Aerosol-generating system with puff detector
An aerosol-generating system includes a liquid-storage portion configured to hold a liquid aerosol-forming substrate, a first electrode, a second electrode, and a control system. The second electrode is spaced from the first electrode. At least a portion of the liquid storage portion is arranged between the first electrode and the second electrode. The control system is configured to measure an electrical quantity between the first electrode and the second electrode, and detect a draw on the aerosol-generating system based on the measured electrical quantity information.
Latest Altria Client Services LLC Patents:
- Dissolvable-chewable exhausted-tobacco tablet
- Nicotine electronic vaping devices having dryness detection and auto shutdown
- Method of making device with chambers configured to accept consumable
- Gas-based material compression and portioning
- METHODS TO ADD MENTHOL, BOTANIC MATERIALS, AND/OR NON-BOTANIC MATERIALS TO A CARTRIDGE, AND/OR AN ELECTRONIC VAPING DEVICE INCLUDING THE CARTRIDGE
This is a continuation of and claims priority to PCT/EP2017/052921 filed on Feb. 9, 2017, and further claims priority to EP 16155568.5 filed on Feb. 12, 2016; both of which are hereby incorporated by reference in their entirety.
BACKGROUNDAt least one example embodiment relates to aerosol-generating systems and cartridges for aerosol-generating systems. The aerosol-generating systems may be electrically operated vaping systems.
One type of aerosol-generating system is an electrically operated vaping system. Electrically operated vaping systems may comprise a liquid aerosol-forming substrate, which is vaporized to form an aerosol. Electrically operated vaping systems often comprise a power supply, a liquid-storage portion configured to hold a supply of liquid aerosol-forming substrate and a heater. The heater used in electronically operated vaping systems may comprise a coil of heater wire wound around an elongate wick soaked in liquid aerosol-forming substrate.
Electrically operated vaping systems may have puff detectors, such as microphones. Puff detectors are typically arranged in an airflow path of the electrically operated vaping system and are configured to sense air passing over the detector when an adult vaper takes a puff.
It would be desirable to provide an improved puff detector for an aerosol generating system. It would be desirable to reduce the number of components of an aerosol generating system. It would be desirable to reduce manufacturing complexity and cost of aerosol-generating systems.
SUMMARYAt least one example embodiment relates to an aerosol-generating system. In at least one example embodiment, an aerosol-generating system comprises a liquid-storage portion configured to hold a liquid aerosol-forming substrate; a first electrode; a second electrode spaced from the first electrode; and a control system. The first electrode and the second electrode are arranged such that at least a portion of the liquid storage portion is between the first electrode and the second electrode. The control system is configured to measure an electrical quantity between the first electrode and the second electrode, and detect a puff on the aerosol-generating system based on the measured electrical quantity information. This may provide the aerosol-generating system with a reliable puff detector. This may enable aerosol-generating systems to dispense with other puff detectors, such as puff detectors arranged in the airflow path of the aerosol generating system. This may enable aerosol-generating systems to dispense with additional airflow paths for puff detectors.
An adult vaper may puff on an aerosol-generating system, drawing air through the aerosol-generating system for inhalation of an aerosol generated by the aerosol-generating system. An adult vaper puff may cause changes or fluctuations in electrical properties of the liquid storage portion. The changes or fluctuations in the electrical properties may be caused by fluctuations in pressure in the liquid storage portion during a puff. The aerosol-generating system is configured to monitor an electrical property of the liquid storage portion. This is achieved by arranging at least a portion of the liquid storage portion between the first electrode and the second electrode and configuring the control system to measure an electrical quantity between the first electrode and the second electrode. As such, the control system is configured to measure an electrical quantity across at least a portion of the liquid storage portion. The control system is further configured to use the measurements of the electrical quantity to detect an adult vaper puff on the aerosol-generating system.
Example embodiments will be further described by way of example only, with reference to the accompanying drawings.
Various example embodiments will now be described more fully with reference to the accompanying drawings in which some example embodiments are shown. However specific structural and functional details disclosed herein are merely representative for purposes of describing example embodiments. Thus, the embodiments may be embodied in many alternate forms and should not be construed as limited to only example embodiments set forth herein. Therefore, it should be understood that there is no intent to limit example embodiments to the particular forms disclosed, but on the contrary, example embodiments are to cover all modifications, equivalents, and alternatives falling within the scope.
In the drawings, the thicknesses of layers and regions may be exaggerated for clarity, avid like numbers refer to like elements throughout the description of the figures.
Although the terms first, second, etc. may be used herein to describe various elements, these dements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.
It will be understood that, if an element is referred to as being “connected” or “coupled” to another element, it can be directly connected, or coupled, to the other element or intervening elements may be present. In contrast, if an element is referred to as being “directly connected” or “directly coupled” to another element, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.).
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises,” “comprising,” “includes” and/or “including,” if used herein, specify the presence of stated features, integers, steps, operations, elements and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof.
Spatially relative terms (e.g., “beneath,” “below,” “lower,” “above,” “upper” and the like) may be used herein for ease of description to describe one element or a relationship between a feature and another element or feature as illustrated in the figures. It will he understood that the spatially relative terms are intended to encompass different orientations of the device during vaping or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, for example, the term “below” can encompass both an orientation that is above, as well as, below. The device may be otherwise oriented (rotated 90 degrees or viewed or referenced in other orientations) and the spatially relative descriptors used herein should be interpreted accordingly.
Example embodiments are described herein with reference to cross-sectional illustrations that are schematic illustrations of idealized embodiments (and intermediate structures). As such, variations front the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, example embodiments should not be construed as limited to the particular shapes of regions illustrated herein but may include deviations in shapes that result, example, from manufacturing. For example, an implanted region illustrated as a rectangle may have rounded or curved features and/or a gradient (e.g., of implant concentration) at its edges rather than an abrupt change from an implanted region to a non-implanted region. Likewise, a buried region formed by implantation may result in some implantation in the region between the buried region and the surface through which the implantation may take place. Thus, the regions illustrated the figures are schematic in nature and their shapes do not necessarily illustrate the actual shape of a region of a device and do not limit the scope.
It should also be noted that in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may in fact be executed substantially concurrently or may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
Although corresponding plan views and/or perspective views of some cross-sectional view(s) may not be shown, the cross-sectional view(s) of device structures illustrated herein provide support for a plurality of device structures that extend along two different directions as would be illustrated in a plan view, and/or in three different directions as would be illustrated in a perspective view. The two different directions may or may not be orthogonal to each other. The three different directions may include a third direction that may be orthogonal to the two different directions. Thu plurality of device structures may be integrated in a same electronic device. For example, when a device structure (e.g., a memory cell structure or a transistor structure) is illustrated in a cross-sectional view, an electronic device may include a plurality of the device structures (e.g., memory cell structures or transistor structures), as would be illustrated by a plan view of the electronic device. The plurality of device structures may be arranged in an array and/or in a two-dimensional pattern.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formed sense unless expressly so defined herein.
Unless specifically stated otherwise, or as is apparent From the discussion, terms such as “processing” or “computing” or “calculating” or “determining” or “displaying” or the like, refer to the action and processes of a computer system, or similar electronic computing device, that manipulates and transforms data represented as physical, electronic quantities within the computer system's registers and memories into other data similarly represented as physical quantities within the computer system memories or registers or other such information storage, transmission or display devices.
As disclosed herein, the term “storage medium”, “computer readable storage medium” or “non-transitory computer readable storage medium,” may represent one or more devices for storing data, including read only memory (ROM), random access memory (RAM), magnetic RAM, core memory, magnetic disk storage mediums, optical storage mediums, flash memory devices and/or other tangible machine readable mediums for storing information. The term “computer-readable medium” may include, but is not limited to, portable or fixed storage devices, optical storage devices, and various other mediums capable of storing, containing or carrying instruction(s) and/or data.
Furthermore, at least some portions of example embodiments only be implemented by hardware, software, firmware, middleware, microcode, hardware description languages, or any combination thereof. When implemented in software, firmware, middleware or microcode, the program code or code segments to perform the necessary tasks may be stored in a machine or computer readable medium such as a computer readable storage medium. When implemented in software, processor(s), processing circuits(s), or processing unit(s) may be programmed to perform the necessary tasks, thereby being transformed into special purpose processor(s) or computer(s).
A code segment may represent a procedure, function, subprogram, program, routine, subroutine, module, software package, class, or any combination of instructions, data structures or program statements. A code segment may be coupled to another code segment or a hardware circuit by passing and/or receiving information, data, arguments, parameters or memory contents. Information, arguments, parameters, data, etc. may be passed, forwarded, or transmitted via any suitable means including memory sharing, message passing, token passing, network transmission, etc.
In order to more specifically describe example embodiments, various features will be described in detail with reference to the attached drawings. However, example embodiments described are not limited thereto.
At least one example embodiment relates to an aerosol-generating system including a liquid-storage portion configured to hold a liquid aerosol-forming substrate; a first electrode; a second electrode spaced from the first electrode; and a control system. The first electrode and the second electrode are arranged such that at least a portion of the liquid storage portion is between the first electrode and the second electrode. The control system is configured to measure an electrical quantity between the first electrode and the second electrode, and detect a puff the aerosol-generating system based on the measured electrical quantity information.
As used herein with reference to the example embodiments, the term ‘electrical quantity’ is used to describe any electrical property, parameter or attribute of a system that can be quantified by measurement. For example, suitable ‘electrical quantities’ include impedance, capacitance and resistance. The control system may be configured to measure at least one of impedance, capacitance and resistance.
The control system may be configured to detect a puff on detection of a change in magnitude of the electrical quantity that exceeds a desired (or, alternatively a predetermined) threshold. The magnitude of the fluctuations in the measured electrical quantity may be small in comparison to the total magnitude of the measured electrical quantity, but may be measurable by the control system. The control system may be configured to detect puff when the rate of change of the measured electrical quantity exceeds a desired (or, alternatively a predetermined) threshold. The rate of change of the electrical quantity due to a puff may be substantially different to the average rate of change of the electrical quantity. The desired (or, alternatively a predetermined) thresholds mat be set in the factory, before first vaping, or by an adult vaper.
The control system may be configured to determine the profile of an adult vaper puff based on the measured electrical quantity. An adult vapor puff may cause a predictable change or fluctuation in the measured electrical quantity over time.
The control system may be configured to detect two or more successive puffs. The control system may he configured to determine an average time between successive puffs.
The control system may be configured to supply an oscillating measurement signal to the first electrode and the second electrode. In other words, the control system may be configured to supply an alternating voltage to the first and second electrodes. The control system may be configured to supply an oscillating measurement signal to the first electrode and the second electrode at a desired (or, alternatively a predetermined) frequency. The desired (or, alternatively a predetermined) frequency may be any suitable frequency for the control system to measure the electrical quantity between the first electrode and the second electrode. The desired (or, alternatively a predetermined) frequency may be equal to or less than about 20 MHz, or equal to or less than about 10 MHz. The desired (or, alternatively a predetermined) frequency may range from about 10 kHz to about 10 MHz, range from about 10 kHz to about 1 MHz, or range from about 100 kHz to about 1 MHz.
Unexpectedly, it has been found that the fluctuations in measured electrical quantities due to puffs are greatest at low frequencies, such as frequencies of less than 1 MHz. This may enable reliable and accurate detection of puffs.
The liquid storage portion may hold liquid aerosol-forming substrate. The liquid storage portion may also comprise one or more of: air held in the liquid storage portion, a carrier material for holding the liquid aerosol-forming substrate, and a housing for holding the liquid aerosol-forming substrate. The liquid aerosol-forming substrate, air, carrier material, and housing may have different electrical properties.
The liquid storage portion may comprise an electrical load. The liquid storage portion may comprise at least one of a resistive load and a capacitive load. Electrical quantities of resistive and capacitive loads may be measured without requiring complex electronics.
The first and second electrodes may be arranged such that liquid aerosol-forming substrate held in the liquid storage portion is arranged between the first electrode and the second electrode. The first electrode and the second electrode may also be arranged such that one or more of the air held in the liquid storage portion, the carrier material, and the housing are arranged between the first and second electrodes. The first and second electrodes may be arranged in contact with liquid aerosol-forming substrate held in the liquid storage portion. The first and second electrodes may be arranged in contact with the carrier material. The first and second electrodes may be arranged in contact with the housing.
The control system may be configured to detect a puff on the aerosol-generating system by comparison. The control system may be configured to compare the measured electrical quantity information to reference electrical quantity information stored in the control system.
Reference electrical quantity information may be stored in a memory of the control system. The reference electrical quantity information may be electrical quantity information measured by the control system and stored in a memory of the control system. The reference electrical quantity information may be associated with puff information. This may enable detection of a puff to be reliable. The reference electrical quantity information may comprise the one or more desired (or, alternatively a predetermined) thresholds.
The reference electrical quantity information may comprise a plurality of ranges of reference electrical quantity information. Each range of the reference electrical quantity information may be associated with a puff. The control system may be configured to compare and match measured electrical quantity information to a stored range of reference electrical quantity information.
The reference electrical quantity information may be stored in a lookup table. The lookup table may comprise stored reference electrical quantity information and stored puff information. The stored reference electrical quantity information may be associated with the stored liquid aerosol-forming substrate puff information. The stored puff information may include one or more of: the occurrence of a puff, the magnitude of the puff, the occurrence of the start of a puff, the occurrence of the end of a puff, and the volume of a puff.
The control system may be configured to indicate to an adult vaper that a puff is occurring. The control system may be configured to indicate to an adult vaper that a puff has occurred. The control system may be configured to count the number of detected puffs. The control system may be configured to indicate to an adult vaper the counted number of detected puffs.
The aerosol-generating system may further comprise an aerosol-generator configured to receive liquid aerosol-forming substrate from the liquid storage portion. The control system may be further configured to supply power to the aerosol-generator on detection at a puff.
A puff may have a duration. The control system may be configured to detect the start of a puff. The start of a puff may affect the electrical properties of the liquid storage portion substantially to enable a puff to be detected by the control system. On detection of the start of a puff, the control system may be configured to supply power to the aerosol-generator. Supplying power to the aerosol-generator enables the aerosol-generator to atomize the liquid aerosol-forming substrate received at the aerosol-generator and generate an aerosol for inhalation by the adult vaper. The control system may be configured to supply power to the aerosol-generator during the remainder or the puff. The control system may be configured to detect the end of a puff. The control system may be configured to substantially prevent and/or reduce power from being supplied to the aerosol-generator on detection of the end of a puff. This may reduce the power requirements of an aerosol-generating system. This may prolong the life of a power supply of the aerosol-generating system.
The control system may be configured to measure the electrical quantity between the first electrode and the second electrode and detect a puff of an adult vaper on the aerosol-generator independently of operation the aerosol-generator. This may enable the control system to operate the aerosol-generator once a puff has been detected. This may reduce the power drawn from a power supply of the aerosol-generating system. This may reduce the operation time of the aerosol-generator per puff and prolong the life of the aerosol-generator.
The first electrode and the second electrode may be arranged at any suitable location relative to the liquid storage portion. The first electrode and the second electrode may be arranged at or in the liquid storage portion. The first electrode and the second electrode may be arranged at or on the housing. Where the housing of the liquid storage portion forms a cavity for holding the liquid aerosol-forming substrate, the first electrode and the second electrode may be arranged at or in the cavity.
The aerosol-generating system may comprise one or more pairs of first and second electrodes. The aerosol-generating system may comprise two or more pairs of electrodes arranged such that different portions of the liquid storage portion are arranged between the first and second electrodes. Providing multiple pairs of electrodes may improve the reliability of the measurements. The one or more pairs of first and second electrodes may comprise part of a sensor.
The electrodes may be any suitable type of electrode. For example, suitable types or electrodes include point electrodes, ring electrodes, plate electrodes, or track electrodes. The first electrode and the second electrode may be the same type of electrode. The first electrode and the second electrode may be different types of electrode.
The electrodes may by any suitable shape. For example, the electrodes may be: square, rectangular, curved, arcuate, annular, spiral, or helical. The electrodes may be substantially cylindrical. The electrodes may comprise one or more sections that are substantially linear, non-linear, planar, or non-planar. The electrodes may be rigid. This may enable the electrodes to maintain their shape. The electrodes may be flexible. This may enable the electrodes to conform to the shape of the liquid storage portion. The electrodes may be configured to conform to the shape of a housing of the liquid storage portion.
The electrodes may have a length, a width, and a thickness. The length of the electrodes may be substantially greater than the width of the electrodes. In other words, the electrodes may be elongate. The thickness of the electrodes may be substantially less than the length and the width of the electrodes. In other words, the electrodes may be thin. Thin electrodes and elongate electrodes may have a larger surface area to volume ratio. This may improve the sensitivity of measurements.
The electrodes may comprise any suitable material. The electrodes may comprise any suitable electrically conductive material. Suitable electrically conductive materials include metals, alloys, electrically conductive ceramics, and electrically conductive polymers. As used herein with respect to at least one example embodiment, an electrically conductive material refers to a material having a volume resistivity at 20° C. of less than about 1×10−3 Ωm. The material may have a volume resistivity at 20° C. ranging from about 1×105 Ωm to about 1×10−5 Ωm. The materials may include gold and platinum, The electrodes may be coated with a passivation layer. The electrodes may comprise or be coated in material that is sufficiently non-reactive so as riot to react with or contaminate the liquid aerosol-forming substrate. The electrodes may comprise transparent or translucent material. For example, a suitable transparent material may be Indium Tin Oxide (ITO).
The electrodes may be arranged in any suitable arrangement relative to the liquid storage portion. The electrodes may be arranged in the liquid storage portion. The first electrode and the second electrode may be arranged at opposite sides of the liquid storage portion. The first electrode and the second electrode may be arranged at opposite ends of the liquid storage portion. Where the liquid-storage portion comprises a carrier material, the electrodes may be arranged in contact with the carrier material. Where the liquid storage portion comprises a housing, at least one of the first and second electrodes may be arranged at or in contact with the housing. The first and second electrodes may be substantially cylindrical. The first electrode may substantially surround the second electrode. The first and second electrodes may be arranged concentrically about a common axis.
At least one of the first electrode and the second electrode may be arranged on a platform. The platform may comprise electrically insulating material. Where the liquid storage portion comprises a housing, the platform may be separate from the housing. The platform may be arranged on the housing. The platform may form a portion of the housing. The platform may comprise the same material as the housing. The platform may comprise a different material to the housing.
The platform may comprise any suitable electrically insulating material. For example, suitable electrically insulating materials include glasses, plastics and ceramic materials. As used herein with respect to example embodiments, an electrically insulating material refers to a material having a volume resistivity 20° C. of greater than about 1×106 Ωm or ranging from about 1×109 Ωm to about 1×1021 Ωm.
The electrodes may be secured on the platform. The electrodes may be secured on the platform by any suitable means. For example, the electrodes may be secured on the platform by a bonding material, such as an adhesive. The electrodes may be deposited on the platform by any suitable method of deposition. The electrodes may be etched in the platform.
The second electrode may be spaced apart from the first electrode. This may substantially present and/or reduce direct contact between the first electrode and the second electrode. The spacing between the first electrode and the second electrode may be consistent along the length of the first electrode and the second electrode. Where the first electrode and the second electrode are arranged at opposite sides of the liquid storage portion, the spacing may be about the width of the liquid storage portion. The spacing between the first electrode and the second electrode may range from about 1 μm to about 1 mm, range from about 1 μm to about 500 μm, or range from about 10 μm to about 100 μm.
The second electrode may substantially follow the path of the first electrode. This may enable the spacing between the first and second electrodes to remain substantially consistent along the length of the first and second electrodes. The second electrode may be arranged substantially parallel to the first electrode.
The first electrode and the second electrode may be interdigitated. The first electrode may comprise a plurality of protrusions and interspaces and the second electrode may comprise a plurality of protrusions and interspaces. The protrusions of the first electrode may extend into the interspaces of the second electrode and the protrusions of the second electrode may extend into the interspaces of the first electrode. Interdigitating the electrodes may reduce and/or substantially minimize the spacing between the electrodes. This may improve the sensitivity of the measurements.
The protrusions of the first and second electrodes may be substantially linear. The protrusions of the first electrode may extend substantially in a first direction and the protrusions of the second electrode may extend substantially in a second direction. The first and second electrodes may be arranged with the first direction substantially parallel to the second direction. The protrusions may be substantially nonlinear. The protrusions may be cursed or arcuate. For example, a suitable sensor comprising interdigitated electrodes may be of the type DRP-G-IDEPT10 from DropSens™.
The aerosol-generating system may comprise aerosol-generator comprising one or more aerosol-generating elements. The one or more aerosol-generating elements may comprise one or more heating elements. The one or more aerosol-generating elements may comprise one or more vibratable elements. Where the aerosol-generator comprises one or more aerosol-generating elements, at least one of the aerosol-generating elements may comprise one of the electrodes. Forming one of the electrodes as part of the aerosol-generator may reduce the number of components required to manufacture the aerosol-generating system.
The control system may comprise electric circuitry. The electric circuitry may comprise a microprocessor, which may be a programmable microprocessor. The electric circuitry may comprise further electronic components. The electric circuitry may be configured to regulate a supply of power to the first electrode and the second electrode.
The control system may be configured to control or regulate a supply of power to the first electrode and the second electrode. The control system may be configured to control or regulate a supply of power to the aerosol-generator. A first control system may be configured to control or regulate the supply of power to the first electrode and the second electrode, and a second control system may be configured to control or regulate the supply of power to the aerosol-generator.
Power may be supplied substantially continuously to the first electrode and the second electrode. Power may be supplied to the first electrode and the second electrode following activation of the system. Power may be suppled to the first electrode and the second electrode in the form of pulses of electrical current.
The control system may be configured to detect a puff on the aerosol-generating system following activation of a system. The control system may be configured to detect a puff on the aerosol-generating system substantially continuously. The control system may be configured to detect a puff on the aerosol-generating system periodically at desired (or, alternatively a predetermined) intervals.
The aerosol-generating system may comprise a power supply. The aerosol-generating system may comprise a power supply configured to supply power to the control system, the first electrode and the second electronic and the aerosol-generator. The aerosol-generator may comprise a single power supply. The aerosol-generator may comprise a first power supply configured to supply power to the first electrode and the second electrode and a second power supply configured to supply power to the aerosol-generator.
During vaping, liquid aerosol-forming substrate held in the liquid storage portion is consumed and replaced with air. Liquid aerosol-forming substrates typically have substantially different electrical properties to air. Therefore, the amount of liquid aerosol-forming substrate held in the liquid storage portion may affect the electrical properties of the liquid storage portion. This may affect the measurement of the electrical quantity between the first electrode and the second electrode and the detection of a puff on the aerosol-generating system. The control system may be configured to determine the amount of liquid aerosol-forming substrate held in the liquid storage portion. The control system may be configured to adjust the puff detection based on the amount of liquid aerosol-forming substrate held in the liquid storage portion. In other words, the control system may be configured to compensate for the amount of liquid aerosol-forming substrate held in the liquid storage portion.
The composition of the liquid aerosol-forming substrate held in the liquid storage portion may affect the measurement of the electrical quantity and the detection off puff on the aerosol-generating system. The control system may be configured to determine the identity of the liquid aerosol-forming substrate held in the liquid storage portion. The control system may be configured to adjust the pull detection based on the amount of liquid aerosol-forming substrate held in the liquid storage portion. In other words, the control system may be configured to compensate for the composition of liquid aerosol-forming substrate held in the liquid storage portion.
The control system way comprise any suitable measuring device configured to measure the electrical quantity between the first electrode and the second electrode. For example, the control system may comprise a bridge circuit configured to measure the electrical quantity between the first electrode and the second electrode. The bridge circuit may be any suitable bridge circuit known in the art, such as a Wheatstone bridge or a Wien bridge. The control system may comprise an LCR meter.
The electrical quantity to be measured by the control system may be impedance. The impedance between the first electrode and the second electrode may depend on the composition of the liquid aerosol-forming substrate held in the liquid storage portion.
The impedance may be measured directly by the control system. The impedance may be calculated. For example, the impedance may be calculated from measurements of the magnitude of the voltage and the current between the electrodes, and measurements of the phase difference between the current and voltage. A puff on the aerosol-generating system may be determined from the measured or calculated impedance.
The electrical quantity to be measured by the control system may be resistance. The resistance between the first electrode and the second electrode may depend on the composition of the liquid aerosol-forming substrate held in the liquid storage portion. The resistivity between the first electrode and the second electrode may depend on the liquid aerosol-forming substrate held in the liquid storage portion. The portion of the liquid storage portion arranged between the first electrode and the second electrodes may comprise a resistive load.
The resistance between the first electrode and the second electrode may be measured where the liquid aerosol-forming substrate comprises conductive materials.
The resistance may be calculated. For example, the resistance may be calculated from measurements of the magnitude of the voltage and the current and the phase difference determined from measurements of the impedance between the first electrode and the second electrode. A puff on the aerosol-generating system may be calculated from the measured or calculated resistance.
The electrical quantity to be measured by the control system may be capacitance where the aerosol-forming substrate comprises dielectric materials.
The capacitance between the first electrode and the second electrode may depend on the composition of the liquid aerosol-forming substrate held in the liquid storage portion. The permittivity between the first electrode and the second electrode may depend on the composition of the liquid aerosol forming substrate held in the liquid storage portion. The portion of the liquid storage portion between the first electrode and the second electrode may comprise a capacitive load. The first electrode and the second electrode may form a capacitor. The first electrode may form a first capacitor plate and the second electrode may form a second capacitor plate. Liquid aerosol-forming substrate held in the liquid storage portion may form part of the dielectric of the capacitor. The capacitive load between the first electrode and the second electrode may have a capacitance in the picofarad (pF) range. This may enable fast charging and discharging times of the capacitor, and enable fast measurements of the capacitance.
The capacitance may be measured. For example, the control system may comprise a measuring device configured to measure charge and discharge times of the capacitor comprising the first and second electrodes. The control system may comprise as timer circuit, such as a 555 timer circuit, and may be configured to determine capacitance based on the frequency of the timer circuit output.
The capacitance may be calculated. For example, the capacitance may be calculated from measurements of the magnitude of the voltage and the current between the first and second capacitor plates and the phase difference between the voltage and the current. The capacitance may be calculated from measurements of the impedance. A puff on the aerosol-generating system may be calculated from the measured or calculated capacitance.
The electrical quantity to be measured by the control system may depend on the size of the first and second electrodes and on the separation between the first and second electrodes. For example, capacitance is a function of the separation between the first and second capacitor plates and the shape and size of the first and second capacitor plates. To ensure that a change in the electrical quantity being measured is not the result of a change in the shape or separation of the first and second electrodes, the first and second electrodes may be rigid and secured to a rigid platform or housing. The capacitor plates may comprise solid metal plates or thin walled metal sheets attached to a supporting substrate. The supporting substrate may be arranged between the capacitor plates to form part of the dielectric between the capacitor plates. The substrate may be arranged on the outside of the capacitor plates.
The liquid storage portion may be any suitable shape and size. For example, the liquid storage portion may be substantially cylindrical. The cross-section of the liquid storage portion may, for example, be substantially circular, elliptical, square or rectangular.
The liquid storage portion may comprise a housing. The housing may comprise a base and one or more sidewalls extending from the base. The base and the one or more sidewalls may be integrally formed. The base and one or more sidewalls may be distinct elements that are attached or secured to each other. The housing may be a rigid housing. As used herein, the term ‘rigid housing’ is used to mean a housing that is self-supporting. The rigid housing of the liquid storage portion may provide mechanical support to the aerosol-generator. The storage portion may comprise one or more flexible walls. The flexible walls may be configured to adapt to the volume of the liquid aerosol-forming substrate held in the liquid storage portion. The housing of the liquid storage portion may comprise any suitable material. The liquid storage portion may comprise substantially fluid impermeable material. The housing of the liquid storage portion may comprise a transparent or a translucent portion, such that liquid aerosol-forming substrate held in the liquid storage portion may be visible to an adult vaper through the housing.
The liquid storage portion may be configured such that aerosol-forming substrate held in the liquid storage portion is protected from ambient air. The liquid storage portion may be configured such that aerosol-forming substrate stored in the liquid storage portion is protected from light. This may reduce the risk of degradation of the substrate and may maintain a high level of hygiene.
The liquid storage portion may be substantially sealed. The liquid storage portion may comprise one or more outlets for liquid aerosol-forming substrate held in the liquid storage portion to flow from the liquid storage portion to the aerosol-generator. The liquid storage portion may comprise one or more semi-open inlets. This may enable ambient air to enter the liquid storage portion. The one or more semi-open inlets use be semi-permeable membranes or one way valves, permeable to allow ambient air into the liquid storage portion and impermeable to substantially prevent and/or reduce air and liquid inside the liquid storage portion from leaving the liquid storage portion. The one or more semi-open inlets may enable air to pass into the liquid storage portion under specific conditions.
The liquid storage portion may comprise at least one channel for holding liquid aerosol-forming substrate. The at least one channel may be configured such that capillary forces act on the liquid aerosol-forming substrate. The capillary force acting on the liquid aerosol-forming substrate may hold the level of the liquid aerosol-forming substrate substantially perpendicular to at least one of the sidewalls of the liquid storage portion and the first and second electrodes. One dimension of the channel may be less than a desired (or, alternatively a predetermined) value, such that capillary forces act on liquid aerosol-forming substrate held in the channel. The dimension of the one or more channels may be the width of the one or more channel. The desired (or, alternatively a predetermined) value may be below about 3 mm, below about 2 mm, below about 0.5 mm, or below about 0.25 mm.
The liquid storage portion may comprise aerosol-forming substrate held in the liquid storage portion. As used herein with reference to example embodiments, an aerosol-forming substrate is a substrate capable of releasing volatile compounds that can form an aerosol. Volatile compounds may be released by heating the aerosol-forming substrate. Volatile compounds may be released by moving the aerosol-forming substrate through passages of a vibratable element.
The aerosol-forming substrate may be liquid. The aerosol-forming substrate may be liquid at room temperature. The liquid aerosol-forming substrate may comprise both liquid and solid components. The aerosol-forming substrate may comprise nicotine. The nicotine containing liquid aerosol-forming substrate may be a nicotine salt matrix. The aerosol-forming substrate may comprise plant-based material. The aerosol-forming substrate may comprise tobacco. The aerosol-forming substrate may comprise a tobacco-containing material containing volatile tobacco flavor compounds, which are released from the aerosol-forming substrate upon heating. The aerosol-forming substrate may comprise homogenized tobacco material. The aerosol-forming substrate may comprise a non-tobacco-containing material. The aerosol-forming substrate may comprise homogenized plant-based material.
The liquid aerosol-forming substrate may comprise at least one aerosol-former. An aerosol-former is any suitable known compound or mixture of compounds that, during vaping, facilitates formation of a dense and stable aerosol and that is substantially resistant to thermal degradation at the temperature of operation of the system. Suitable aerosol-formers are well known in the art and include, but are not limited to: polyhydric alcohols, such as triethylene glycol, 1,3-butanediol and glycerine; esters of polyhydric alcohols, such as glycerol mono-, di- or triacetate; and aliphatic esters of mono-, di- or polycarboxylic acids, such as dimethyl dodecanedioate dimethyl tetradecanedioate. Aerosol formers may be polyhydric alcohols or mixtures thereof, such as triethylene glycol, 1,3-butanediol and glycerine. The liquid aerosol-forming substrate may comprise other additives and ingredients, such as flavorants.
The liquid aerosol-forming substrate may comprise water, solvents, ethanol, plant extracts and natural or artificial flavors. The liquid aerosol-forming substrate may comprise one or more aerosol formers. Examples of suitable aerosol formers include glycerine and propylene glycol.
The liquid aerosol-forming substrate may comprise nicotine and at least one aerosol former. The aerosol former may be glycerine. The aerosol-former may be propylene glycol. The aerosol former may comprise both glycerine and propylene glycol. The liquid aerosol-forming substrate may have a nicotine concentration ranging from about 0.5% to about 10%, for example about 2%.
The liquid aerosol-forming substrate may contain a mixture of dielectric materials, each with a separate dielectric constant (k). The main constituents of a liquid aerosol-forming substrate at room temperature, about 20° C., may include: glycerine (k~42), propylene glycol (K~32), water (k~80), air (k~1), nicotine anti flavorants. Where the liquid aerosol-forming substrate forms a dielectric material, the electrical quantity to be measured by the control system may be capacitance.
The liquid aerosol-forming substrate may comprise a mixture of electrically conductive materials. Where the liquid aerosol-forming substrate forms an electrically conductive material, the electrical quantity to be measured by the control system may be resistance.
The liquid storage portion may comprise a carrier material within the housing for holding the liquid aerosol-forming substrate. The liquid aerosol-forming substrate may be adsorbed or otherwise loaded onto the carrier material. Liquid aerosol-forming substrate absorbed in the material may spread or permeate through the carrier material, and changes in the saturation of the carrier material affect the entire body of carrier material. This may enable first and second electrodes arranged in contact with a portion of the carrier material to sense changes in the electrical quantity of the entire body of carrier material. This may enable the control system to measure the electrical quantity of the entire liquid storage portion.
The carrier material may be made from any suitable absorbent body of material, for example, a foamed metal or plastics material, polypropylene, terylene, nylon fibers or ceramic. The aerosol-forming substrate may be retained in the carrier material prior to use of the aerosol-generating system. The aerosol-forming substrate may be released into the carrier material during vaping. The aerosol-forming substrate may be released into the carrier material immediately prior to use. For example, the liquid aerosol-forming substrate may be provided in a capsule. The shell of the capsule may melt upon heating by the heating element and releases the liquid aerosol-forming substrate into the carrier material. The capsule may contain a solid in combination with the liquid.
The liquid aerosol-forming substrate may be held in a capillary material. A capillary material is a material that actively conveys liquid from one end of the material to another. The capillary material may draw liquid aerosol-forming substrate to a specific location in the liquid storage portion, regardless of the orientation of the liquid storage portion. This may facilitate arrangement of the first and second electrodes for accurate and reliable detection of a puff on the aerosol generating system.
The capillary material may be configured to convey the aerosol-forming substrate to the aerosol-generator. The capillary material may have a fibrous structure. The capillary material may have a spongy structure. The capillary material may comprise a bundle of capillaries. The capillary material may comprise a plurality of fibers. The capillary material may comprise a plurality of threads. The capillary material may comprise fine bore tubes. The fibers, threads or fine-bore tubes may be generally aligned to convey liquid to an atomizer. The capillary material may comprise a combination of fibers, threads and fine-bore tubes. The capillary material may comprise sponge-like material. The capillary material may comprise foam-like material. The structure of the capillary material may form a plurality of small bores or tubes, through which the liquid can be transported by capillary action.
The capillary material may comprise any suitable material or combination of materials. Examples of suitable materials are a sponge or foam material, ceramic- or graphite-based materials in the form of fibers or sintered powders, foamed metal or plastics materials, a fibrous material, for example made of spun or extruded fibers, such as cellulose acetate, polyester, or bonded polyolefin, polyethylene, terylene or polypropylene fibers, nylon fibers or ceramic. The capillary material may have any suitable capillarity and porosity so as to be used with different liquid physical properties. The liquid aerosol-forming substrate has physical properties, including but not limited to viscosity, surface tension, density, thermal conductivity, boiling, point and vapour pressure, which allow the liquid to be transported through the capillary material by capillary action.
The aerosol-generator may be configured to receive aerosol-forming substrate from the liquid storage portion. The aerosol-generator may be an atomizer and/or a vaporizer. The aerosol-generator may comprise one or more aerosol-generating elements. The aerosol-generator may be configured to vaporize received aerosol-forming substrate using heat. The aerosol-generator may comprise a heating element for vaporizing received liquid aerosol-forming substrate. The one or more aerosol-generating elements may be heating elements. The aerosol-generator may be configured to atomize received aerosol-forming substrate using ultrasonic vibrations. The aerosol-generator may comprise an ultrasonic transducer. The one or more aerosol-generating elements may comprise one or more vibratable elements.
The aerosol-generator may comprise a heating element configured to heat the aerosol-forming substrate. The heating element may comprise one or more heating elements. The one or more heating elements may be arranged appropriately so as to most effectively heat received aerosol-forming substrate. The one or more heating elements may be configured to heat the aerosol-forming substrate primarily by means of conduction. The one or more heating elements may be arranged substantially directly contact with the aerosol-forming substrate. The one or more heating elements may be configured to transfer heat to the aerosol-forming substrate via one or more heat conductive elements. The one or more heating elements may be configured to transfer heat to ambient air drawn through the aerosol-generating system during vaping, which may heat the aerosol-forming substrate by convection. The one or more heating elements may be configured to heat the ambient air before it is drawn through the aerosol-forming substrate. The one or more heating elements may be configured to heat the ambient air after it is drawn through the aerosol-forming substrate.
The heating element may be an electric heating element or an electric heater. The electric heater may comprise one or more electric heating elements. The one or more electric heating elements may comprise an electrically resistive material. Suitable electrically resistive materials may include: semiconductors such as doped ceramics, electrically “conductive” ceramics (such as, for example, molybdenum disilicide), carbon, graphite, metals, metal alloys and composite materials made of a ceramic material and a metallic material.
The one or more electric heating elements may take any suitable form. For example, the one or more electric heating elements may take the form of one or more heating blades. The one or more electric heating elements may take the form of a casing or substrate having different electro-conductive portions, or one or more electrically resistive metallic tube.
The liquid storage portion may incorporate one or more disposable heating elements. The one or more electric heating elements may comprise one or more heating needles or rods that run through the aerosol-forming substrate. The one or more electric heating elements may comprise one or more flexible sheets of material. The electric heating element may comprise one or more heating wires or filaments, for example Ni—Cr, platinum, tungsten or alloy wires, or heating plates. The one or more heating elements may be deposited in and/or on a rigid carrier material.
The one or more heating elements may comprise one or more heat sinks or heat reservoirs. The one or more heat sinks or heat reservoirs may comprise a material capable of absorbing and storing heat and subsequently releasing the heat over time to heat the aerosol-forming substrate.
The heating element may be substantially flat to allow for straightforward manufacture. As used herein, the term ‘substantially flat’ means formed in a single plane and not wrapped around or otherwise confirmed to fit a curved or other non-planar shape. A flat heating element may be easily handled during manufacture and provide for a robust construction.
The heating element may be of the type described in EP-B1-2493342, the entire content of which is incorporated herein by reference thereto. For example, the heating element may comprise one or more electrically conductive tracks on as electrically insulating substrate. The electrically insulating substrate may comprise any suitable material, and may be a material that is able to tolerate high temperatures (in excess of 300° C.) and rapid temperature changes. An example of a suitable material is a polyimide film, such as Kapton®.
The heating element may comprise a heater configured to heat a small amount of liquid aerosol-forming substrate at a time. The heater for heating a small amount of liquid aerosol-forming substrate at a time may include, for example, a liquid passageway in communication with the liquid aerosol-forming substrate. The liquid aerosol-forming substrate may be formed into the liquid passageway by capillary force. The at least one heater may be arranged such that during use, only the small amount of liquid aerosol-forming substrate within the liquid passageway, and not the liquid within the housing, is heated. The heating element may comprise a coil substantially surrounding at least a portion of a liquid passageway.
The heating element may comprise an inductive heating element. Inductive heating elements are described in more detail below, in relation to the cartridge.
The aerosol-generator may comprise one or more vibratable elements and one or more actuators configured to excite vibrations in the one or more vibratable elements. The one or more vibratable elements may comprise a plurality of passages through which aerosol-forming substrate may pass and become atomized. The one or more actuators may comprise one or more piezoelectric transducers.
The aerosol-generator may comprise one or more capillary wicks for conveying liquid aerosol-forming substrate held in the liquid storage portion to the one or more elements of the aerosol-generator. The liquid aerosol-forming substrate may have physical properties, including viscosity, which allow the liquid to be transported through the one or mom capillary wicks by capillary action. The one or more capillary wicks may have any of the properties of structures described above relating to the capillary material.
The one or more capillary wicks may be in contact with liquid held in the liquid storage portion. The one or more capillary wicks may extend into the liquid storage portion. During vaping, liquid may be transferred from the liquid storage portion to the one or more elements of the aerosol-generator by capillary action in the one or more capillary wicks. The one or more capillary wicks may have a first end and a second end. The first end may extend into the liquid storage portion to draw liquid aerosol-forming substrate held in the liquid storage portion into the aerosol generator. The second end may extend into an air passage of the aerosol-generating system. The second end may comprise one or more aerosol-generating elements. The first end and the second end may extend into the liquid storage portion. One or more aerosol-generating elements may be arranged at a central portion of the wick between the first and second ends. During vaping, when the one or snore aerosol-generating elements are activated, the liquid aerosol-forming substrate in the one or more capillary wicks is atomized and/or vaporized at and around the one or more aerosol-generating elements.
The aerosol generator may comprise one or more heating wires or filaments encircling a portion of one or more capillary wicks. The heating wire or filament may support the encircled portion of the one or more capillary wicks.
During atomized and/or vaporized aerosol-forming substrate may be mixed with and carried in air flow through an air passage of the aerosol-generating system. The capillary properties of the one or more capillary wicks, combined with the properties of the liquid substrate, may ensure that, during vaping when there is sufficient aerosol-forming substrate, the wick is always wet with liquid aerosol-forming substrate in the area of the aerosol-generator.
The aerosol-generating system may comprise one or more power supplies. The power supply may be a battery. The battery may be a Lithium based battery, for example a Lithium-Cobalt, a Lithium-Iron-Phosphate, a Lithium Titanate or a Lithium-Polymer battery. The battery may be a Nickel-metal hydride battery or a Nickel cadmium battery. The power supply may be another form of charge storage device such as a capacitor. The power supply may require recharging and be configured for many cycles of charge and discharge. The power supply may have a capacity that allows for the storage of enough energy for one or more vaping experiences; for example, the power supply may have sufficient capacity to allow for the continuous generation of aerosol for a period of around six minutes, corresponding to the time taken to smoke a cigarette, or for a period that is a multiple of six minutes. In another example embodiment, the power supply may have sufficient capacity to allow for a desired (or, alternatively a predetermined) number of puffs or discrete activations of the heating element and actuator.
The aerosol-generating system may comprise a control system configured to operate the aerosol-generator. The control system configured to operate the aerosol generator may be the control system configured to detect an adult vapor puff on the aerosol-generating system. The control system configured to operate the aerosol-generator may be distinct of the control system configured to detect an adult vaper puff on the aerosol-generating system. The control system configured to operate the aerosol-generator may comprise similar components to the control system configured to detect an adult vaper puff on the aerosol-generating system.
The aerosol-generating system may comprise a temperature sensor in communication with the control system. The temperature sensor may be adjacent to the liquid storage portion. The temperature sensor may be a thermocouple. At least one element of the aerosol-generator may be used by the control system to provide information relating to the temperature. The temperature dependent resistive properties of the at least one element may be known and used to determine the temperature of the at least one element in a manner known to the skilled person. The control system may be configured to account or compensate for the effect of temperature on the electrical load between the first electrode and the second electrode using measurements of temperature from the temperature sensor. In at least one example embodiment, where the portion of the liquid storage portion between the first and second electrodes comprises a capacitive load, the control system may be configured to account for variations in the dielectric properties of the liquid storage portion due to changes in temperature.
The control system may comprise a tilt sensor. The tilt sensor may be configured to sense the orientation of the liquid storage portion. The aerosol-generating system may comprise a control system configured to receive sensed orientation information from the tilt sensor and to determine the orientation of the liquid storage portion. By determining the orientation of the liquid storage portion, the control system may be configured to determine whether the liquid aerosol-forming substrate held in the liquid storage portion is substantially perpendicular to the first electrode and the second electrode. The control system may be configured to detect an adult vaper puff on the aerosol-generating system when the liquid aerosol-forming substrate held in the liquid storage portion is substantially perpendicular to the first and second electrodes, such as when the liquid storage portion is determined to be upright.
The liquid aerosol-forming substrate may be subject to gravitational and acceleration forces that move the liquid aerosol-forming substrate to different sections of the liquid storage portion. Provided that the entire liquid storage portion is arranged between the first and second electrodes, the measurement of the electrical quantity should not be affected.
The aerosol-generating system may comprise an input, such as a switch or button. This enables the adult vaper to turn the system on. The switch or button may activate the aerosol-generator. The switch or button may initiate aerosol generation. The switch or button may prepare the control electronics to await input from the puff detector.
The aerosol-generating system may comprise an indicator, for indicating the occurrence of a puff to an adult vaper. The indicator may comprise one or more of lights, such as light emitting diodes (LEDS), a display, such as an LCD display, and a loudspeaker or buzzer. The control system may be configured to indicate that a puff has occurred to an adult vaper with the indicator. The control system may be configured to light one or more of the lights depending on the determined strength of liquid aerosol-forming substrate, display a type or strength of liquid aerosol-forming substrate on the display or emit sounds via the loudspeaker or buzzer to indicate determination of an authorized or unauthorized liquid aerosol-forming substrate.
The aerosol-generating system may comprise a housing. The housing may be elongate. The housing may comprise any suitable material or combination of materials. Examples of suitable materials include metals, alloys, plastics or composite materials containing one or more of those materials, or thermoplastics that are suitable for food or pharmaceutical applications, for example polypropylene, polyetheretherketone (PEEK) and polyethylene, The material may be light and non-brittle.
The housing may comprise a cavity configured to receive the power supply. The housing may comprise a mouthpiece. The mouthpiece may comprise at least one air inlet and at least one air outlet. The mouthpiece may comprise more than one air inlet. One or more of the air inlets may reduce the temperature of the aerosol before it is delivered to an adult vaper and may reduce the concentration of the aerosol before it is delivered to an adult vaper.
The aerosol-generating system may be portable. The aerosol-generating system may have a size comparable to a cigar or a cigarette. the aerosol-generating system may have a total length ranging from about 30 mm to about 150 mm. The aerosol-generating system may have an external diameter ranging from about 5 mm to about 30 mm.
The aerosol generating system may be an electrically operated vaping system. The aerosol-generating system may be an electronic cigarette or an electronic cigar.
The aerosol-generating system may comprise a main unit and a cartridge. The main unit comprises the control system. The cartridge comprises the liquid storage portion configured to hold the liquid aerosol-forming substrate. The main unit may be configured to removably receive the cartridge. The first electrode and the second electrode may be arranged such that a portion of the liquid storage portion of the cartridge is arranged between the first electrode and the second electrode when the cartridge is received by the main unit.
The main unit may comprise one or more power supplies. The main unit may comprise the aerosol-generator.
The cartridge may comprise the aerosol-generator. Where the cartridge comprises the aerosol-generator, the cartridge may be referred to as a ‘cartomizer’.
The aerosol-generating system may comprise an aerosol-generating component comprising the aerosol-generator. The aerosol-generating component may be separate of the main unit and the cartridge. The aerosol-generating component may be removably receivable by at least one of the main unit and the cartridge.
The main unit may comprise the first electrode and the second electrode. The cartridge may comprise the first electrode and the second electrode. The main unit may comprise one of the first electrode and the second electrode. The cartridge may comprise one of the first electrode and the second electrode. Arranging one of the first electrode and the second electrode on the main unit and arranging the other of the first electrode and the second electrode on the cartridge may enable identification of the cartridge. In other words, the presence or absence of an electrode on the cartridge may be used to verify whether the cartridge received by the main unit is a genuine or authentic cartridge from the manufacturer of the main unit. The type of electrode or measurements between the electrode of the mina unit and the electrode of the cartridge may also be used to identify the type of cartridge received by the main unit or the type of liquid aerosol-forming substrate held in the liquid storage portion of the cartridge. The control system may be configured to determine the presence or absence of an electrode in the cartridge. The control system may be configured to determine the identity the cartridge based on the presence or absence of an electrode in the cartridge. The control system may also be configured to determine whether the cartridge has been correctly received by the main unit based on the presence or absence of an electrode in the cartridge.
The aerosol-generator may comprise a heating element substantially as described above. The heating element may be inductive heating element, such that no electrical contacts are formed between the cartridge and the main unit. The main unit may comprise an inductor coil and a power supply configured to provide high frequency oscillating current to the inductor coil. The cartridge may comprise a susceptor element positioned to heat the aerosol-forming substrate. As used herein, a high frequency oscillating current means an oscillating current having a frequency of between 10 KHz and 20 MHz.
The cartridge may be removably coupled to the main unit. The cartridge may be removed from the main unit when the aerosol-forming substrate has been consumed. The cartridge is disposable. The cartridge may be reusable and the cartridge may be refillable with liquid aerosol-forming substrate. The cartridge may be replaceable in the main unit. The main unit may be reusable.
The cartridge may be manufactured at low cost, in a reliable and repeatable fashion. As used herein, the term ‘removably coupled’ is used to mean that the cartridge and main unit can be coupled and uncoupled from one another without significantly damaging either the main unit or cartridge.
The cartridge may have a simple design. The cartridge may have a housing within which a liquid aerosol-forming substrate is held. The cartridge housing may be a rigid housing. The housing may comprise a material that is substantially impermeable to liquid.
The cartridge may comprise a lid. The lid may be peelable before coupling the cartridge to the main unit. The lid may be piercable.
The main unit may comprise a cavity for receiving the cartridge. The main unit may comprise a cavity for receiving the power supply.
The main unit may comprise the aerosol-generator. The main unit may comprise one or more control systems of the aerosol-generating system. The main unit may comprise the power supply. The power supply may be removably coupled to the main unit.
The main unit may comprise the mouthpiece. The mouthpiece may comprise at least one air inlet and at least one air outlet. The mouthpiece may comprise more than one air inlet.
The main unit may comprise a piercing element for piercing the lid of the cartridge. The mouthpiece may comprise the piercing element. The mouthpiece may comprise at least one first conduit extending between the at least one air inlet and a distal end of the piercing element. The mouthpiece may comprise at least one second conduit extending between a distal end of the piercing element and the at least one air outlet. The mouthpiece may be arranged such that during vaping, when an adult vaper draws on the mouthpiece, air flows along an air passage extending from the at least one air inlet, through the at least one first conduit, through a portion of the cartridge, through the at least one second conduit and exits the at least one outlet. This may improve airflow through the main unit and enable the aerosol to be delivered to the adult vaper more easily.
During vaping, an adult vaper may insert a cartridge as described herein into the cavity of a main unit as described herein. The adult vaper may attach the mouthpiece to the body of the main unit, which may pierce the cartridge with the piercing portion. The adult vaper may activate the main unit by pressing the switch or the button. The adult vaper may draw on the mouthpiece to draw air into the main unit through the one or more air inlets. The air may pass over a portion of the aerosol-generator, entraining atomized and/or vaporized aerosol-forming substrate, and exit the main unit through the air outlet in the mouthpiece.
A kit of parts may be provided, comprising a cartridge and a main unit, substantially as described above. An aerosol-generating system according to at least one example embodiment may be provided by assembling the cartridge, the aerosol-generator and the main unit. The components of the kit of parts may be removably connected. The components of the kit of parts may be interchangeable. Components of the kit of parts may be disposable. Components of the kit of parts may be reusable.
According to at least one example embodiment, there is provided a main unit kit an aerosol-generating system. The main unit comprises the control system and at least one of the first electrode and the second electrode.
There may be provided a cartridge for an aerosol-generating system according to at least one example embodiment. The cartridge may comprise the liquid storage portion and at least one of the first electrode and the second electrode. The cartridge may comprise a housing configured to hold a liquid aerosol-forming substrate in the liquid storage portion.
According to at least one example embodiment, there is provided a method of detecting puffs on an aerosol-generating system. The method comprises holding a liquid aerosol-forming substrate in a liquid storage portion of an aerosol-generating system, arranging at least a portion of the liquid storage portion between a first electrode and a second electrode, measuring an electrical quantity between the first electrode and the second electrode, and detecting a puff or draw on the aerosol-generating system based on the measured electrical quantity information.
Features of the method, such as the liquid storage portion and the first electrode and the second electrode may be the same as those described in relation to the example embodiments described herein.
The detecting an adult vaper puff on the aerosol-generating system may comprise comparing the measured electrical quantity information to reference electrical quantity information. The reference electrical quantity information may be electrical quantity information previously measured by the control system. The reference electrical quantity information may be stored in a memory of the aerosol generating system. The reference electrical quantity information may be stored in a lookup table.
The reference electrical quantity information may be measured by the control system in a calibration procedure. The calibration procedure may be performed to populate the lookup table. In the calibration procedure, the liquid storage portion may be loaded with a liquid aerosol-forming substrate and puffs having a regular profile and duration may be made on the aerosol-generating system. The electrical quantity between the first electrode and the second electrode may be measured and fluctuations corresponding to puffs may be measured. The absolute or relative magnitude of the fluctuations of the electrical quantity due to puffs may be stored in a lookup table in a memory of the control system and associated in the lookup table with the detection of a puff.
The calibration procedure may be performed in the factory before the aerosol-generating system is distributed. The calibration procedure may be performed by an adult vaper before first vaping of the aerosol-generating system.
A method of operating an aerosol-generating system may comprise holding a liquid aerosol-forming substrate in a liquid storage portion of an aerosol-generating system, arranging at least a portion of the liquid storage portion between a first electrode and a second electrode, measuring an electrical quantity between the first electrode and the second electrode, detecting an adult vapor puff on the aerosol-generating system based on the measured electrical quantity information, and supplying power to an aerosol-generator of the aerosol-generating system on detection of an adult vaper puff.
Features described in relation to one example embodiments may also be applicable to other example embodiments. Features described in relation to the method may be applicable to the aerosol-generating system and features corresponding to the aerosol-generating system may be applicable to the method.
The main unit 100 comprises a main housing 101. The housing is substantially cylindrical and has a longitudinal length of about 100 mm and an external diameter of about 20 mm, comparable to a cigar. The main unit 100 comprises an electric power supply in the form of a lithium ion phosphate battery 102 and a control system in the form of control electronics 104. The main housing 101 also defines a cavity 112 into which the cartridge 200 is received.
The main unit 100 also includes a mouthpiece portion 120 including an outlet 124. The mouthpiece portion is connected to the main housing 101 by a hinged connection, but any kind of connection may be used, such as a snap fitting or a screw fitting. One or more air inlets 122 are provided between the mouthpiece portion 120 and the main body 101 When the mouthpiece portion is in as closed position, as shown in
Within the mouthpiece portion is a flat spiral inductor coil 110. The coil 110 is formed by stamping or cutting a spiral coil from a sheet of copper. The coil 110 is positioned between the air inlets 122 and the air outlet 124 so that air drawn through the inlets 122 so the outlet 124 passes through the coil.
The cartridge 200 (shown in schematic form in
During vaping, an adult vaper puffs on the mouthpiece portion 120 to draw air though the air inlets 122 into the mouthpiece portion 120 and out of the outlet 124. The main unit includes a puff sensor 106 in the form of a microphone, as part of the control electronics 104. A small air flow is drawn through sensor inlet 121 past the microphone 106 and up into the mouthpiece portion 120 when an adult vaper puffs on the mouthpiece portion. When a puff is detected, the control electronics provide a high frequency oscillating current to the coil 110. This generates an oscillating magnetic field as shown in dotted lines in
The cartridge 200 has a substantially cylindrical shape, and the susceptor element spans a circular open end of the cartridge housing. It will be appreciated that other configurations are possible. For example, the susceptor element may be a strip of steel mesh 220 that spans a rectangular opening in the cartridge housing 204.
In at least one example embodiment, as shown in
It will be appreciated hat the aerosol-generating system may comprise other types of aerosol-generator. For example, the aerosol-generator may comprise other aerosol-generator configured to vaporize the liquid aerosol-forming substrate by heat. The aerosol-generator may comprise one or more resistive heating elements. The aerosol-generator may also comprise aerosol-generator configured to atomize the liquid aerosol-forming substrate by vibration. The aerosol-generator may comprise one or more vibratable elements and actuators.
In at least one example embodiment, the aerosol-generating system comprises first electrodes and second electrodes spaced from the first electrodes. Portions of the liquid storage portions are arranged between the first electrodes and the second electrodes. The control systems are configured to measure an electrical quantity between the first electrodes and second electrodes, and detect an adult vaper puff on the aerosol-generating system based on measured electrical quantity information. As such, aerosol generating systems do not require additional puff detectors, such as the puff detector 106 of the aerosol-generating system 100 shown in
Several examples of cartridges suitable for main units of aerosol generating systems, such as the main unit shown in
The cartridge 300 shown in
Electrical contacts (not shown) extend through the housing, from the outer surface to the inner surface of each of the plates. When the cartridge 300 is received in a cavity of a main unit, the contacts of the cartridge 300 abut complimentary contacts arranged in the cavity of the main unit to electrically connect the sensor 303 to a power supply and a control system of the main unit.
The cartridge 310 shown in
The cartridge 310 shown in
The cartridge 330 shown in
The cartridge 340 shown in
An example embodiment of first and second electrodes on platform, such as the platform of the sensor 343, is shown in
The main track of the first electrode 344′ and the main track of the second electrode 345′ are arranged in parallel on the platform, at a separation of about 6780 μm. The first electrode 344′ is arranged with its protrusions 346′ facing the second electrode 345′ and within the interspaces of the second electrode 345′, The second electrode 345′ is arranged with its protrusions 347′ facing the first electrode 344′ and within the interspaces of the first electrode 344′. In this arrangement, a consistent spacing of about 10 μm is provided between the first electrode 344′ and the second electrode 345′ along the entire length of the electrodes 344′, 345′.
Another example embodiment of first and second electrodes on a platform, such as the platform of the sensor 343, is shown in
The main track of the first electrode 344″ and the main track of the second electrode 345″ are arranged in coaxial alignment on the platform parallel on the platform, with the protrusions 346″ of the first electrode 344″ within the interspaces of the second electrode 345″ and the protrusions 347″ of the second electrode 345″ within the interspaces of the first electrode 344″. The distalmost protrusion of the first electrode 344″ substantially surrounds the distalmost protrusion of the second electrode 345″. In at least one example embodiment, a substantially consistent spacing of about 10 μm is provided between the first electrode 344′ and the second electrode 345′ along the entire length of the electrodes 344′, 345′.
The cartridge 350 shown in
The cartridge 350 further comprises aerosol-generator in the form of a wick 352 extending front an end of the liquid storage portion and a heating coil 358 wound around the wick 352 at the distal end. During vaping, the coil 358 heats the wick 352 and vaporizes liquid aerosol-forming substrate in the wick 352. This draws liquid aerosol-harming substrate held in the liquid storage portion to the wick end of the liquid storage portion. The capillary forces caused by the narrow separation between the first and second electrodes 354, 355 do not enable the liquid aerosol-forming substrate held in the liquid storage portion to move freely. As a result, liquid aerosol-forming substrate collects at the wick end of the liquid storage portion and the liquid storage portion may be notionally divided into two sections, a first section 38A towards the wick end that is filled with liquid aerosol-forming substrate and a second section 38B opposite the wick end that is filled with air. As the liquid aerosol-forming substrate is consumed during vaping, the second section 38B filled with air increases in size and the first section 38A filled with liquid aerosol-forming substrate decreases in size.
In at least one example embodiment, as shown in
In at least one example embodiment, as shown in
In other example embodiments (not shown) the sensor 403 may be connected to the power supply 406, which may be configured to supply power to the sensor circuit 401 and the control system circuit 402. The power supply 406 may also be configured to supply power to the aerosol-generator of the aerosol-generating system and the control system circuit 402 may be configured to control operation of the aerosol-generator.
In at least one example embodiment, an aerosol-generating system comprises one of the cartridges shown in
When the control system is supplying power to the aerosol-generator, the control system continues to measure the impedance and determine the rate of change of the impedance. However, when the control system is supplying power to the aerosol-generator, the control system compares the determined rate of change to a second desired (or, alternatively a predetermined) threshold. When the determined rate of change exceeds the second desired (or, alternatively a predetermined) threshold, the control system detects the end of an adult vaper puff, and stops supplying power to the aerosol-generator and the LED.
The experimental data shown in
A 2 V alternating voltage was supplied to the sensor at a frequency of 100 kHz, and the resistance 501 and capacitance 502 of the sensor were measured using au LCR meter. Power was supplied to heat the aerosol-generator to atomized liquid aerosol-forming substrate received at the mesh and a regular series of puffs were taken on the mouthpiece using an analytical machine at a frequency of 2 puffs per minute. Each puff had a rectangular puff profile, a puff volume of 55 ml and a duration of about 3 seconds (s).
The experimental data shown in
A 1 V alternating voltage was supplied to the sensor at a frequency of 1013 kHz, and the resistance 601 and the capacitance 602 of the sensor were measured using an LCR meter. Power was supplied to heat the aerosol-generator to atomized liquid aerosol-forming substrate received at the mesh and a regular series of puffs were taken on the mouthpiece using an analytical machine at a frequency of 2 puffs per minute. Each puff had a rectangular puff profile, a puff volume of 55 ml and a duration of 3 s.
Similar procedures may be performed during calibration of an aerosol-generating system, wherein a desired (or, alternatively a predetermined) series of puffs may be taken on the aerosol-generating system, and a change in at least one of the inductance, resistance or capacitance may be measured and associated with detection of a puff. The results of such a calibration procedure may be stored in the memory of a control system of the aerosol-forming substrate.
It will be appreciated that the relationship between the impedance, resistance and capacitance between the first and second electrodes and the fluctuations caused by the occurrence of a puff will depend on the type and relative positions of the electrodes relative to the liquid storage portion.
It will be appreciated that in other example embodiments (not shown) that the cartridges described in relation to
It will be appreciated that features described for one example embodiment may be provided in other example embodiments. In particular, it will be appreciated that cartridges and aerosol-generating systems may comprise more than one means of detecting an adult vaper puff on the aerosol-generating system, such as more than one pair of first and second electrodes.
Claims
1. An aerosol-generating system comprising:
- a storage portion configured to hold an aerosol-forming substrate;
- a first electrode;
- a second electrode spaced from the first electrode, a portion of the storage portion being arranged between the first electrode and the second electrode; and
- a control system configured to, measure an electrical quantity of the portion of the storage portion between the first electrode and the second electrode, determine a rate of change of the measured electrical quantity of the portion of the storage portion, and detect a draw on the aerosol-generating system based on the rate of change of the measured electrical quantity of the portion of the storage portion.
2. The aerosol-generating system according to claim 1, wherein the control system is configured to apply an oscillating measurement signal to the first electrode and the second electrode.
3. The aerosol-generating system according to claim 1, wherein the control system is configured to detect the draw when the rate of change of the measured electrical quantity exceeds a threshold.
4. The aerosol-generating system according to claim 1, further comprising:
- an aerosol-generator configured to receive aerosol-forming substrate from the storage portion.
5. The aerosol-generating system according to claim 1, further comprising:
- an aerosol-generator, wherein the control system is configured to supply power to the aerosol-generator on detection of the draw.
6. The aerosol-generating system according to claim 1, wherein the first electrode and the second electrode are arranged on a platform of electrically insulating material.
7. The aerosol-generating system according to claim 1, wherein the first electrode and the second electrode are interdigitated.
8. The aerosol-generating system according, to claim 1, wherein the aerosol-generating system further comprises an aerosol-generator comprising one or more aerosol-generating elements, and wherein at least one of the aerosol-generating elements comprises the first electrode, the second electrode, or both the first electrode and the second electrode.
9. The aerosol-generating system according to claim 1, wherein the measured electrical quantity is impedance between the fast electrode and the second electrode.
10. The aerosol-generating system according to claim 1, wherein the measured electrical quantity is resistance between the first electrode and the second electrode.
11. The aerosol-generating system according to claim 1, wherein the measured electrical quantity is capacitance between the first electrode and the second electrode.
12. The aerosol-generating system according to claim 1, further comprising,
- a cartridge including, the storage portion; and
- a main unit including, the control system.
13. The aerosol-generating system according to claim 12, wherein the main unit is configured to removably receive the cartridge, and the first electrode and the second electrode are arranged such that a portion of the storage portion of the cartridge is arranged between the first electrode and the second electrode when the cartridge is received by the main unit.
14. The aerosol-generating system according to claim 12, wherein the cartridge comprises,
- the first electrode, and
- the second electrode.
15. The aerosol -generating system according to claim 12, wherein the main unit comprises,
- the first electrode, and
- the second electrode.
16. The aerosol-generating system according to claim 12, wherein the cartridge comprises,
- one of the first electrode or the second electrode, and the main unit comprises,
- another one of the first electrode or the second electrode.
17. The aerosol-generating system according to claim 1, wherein the first electrode comprises a first arcuate metal plate, and the second electrode comprises a second arcuate metal plate.
18. The aerosol-generating system according to claim 1, wherein the first electrode comprises a first metal ring, and the second electrode comprises a second metal ring.
19. The aerosol-generating system according to claim 2, wherein the oscillating measurement signal has a frequency of less than 10 MHz.
20. A main unit for an aerosol-generating system comprising:
- least one of a first electrode and a second electrode; and
- a control system configured to: measure an electrical quantity of a storage portion between the first electrode and the second electrode, the storage portion configured to store an aerosol-forming substrate, determining a rate a change of the measured electrical quantity of the storage portion, and detect a draw on the aerosol-generating system based on the rate of change of the measured electrical quantity of the storage portion.
21. A method of detecting a draw on an aerosol-generating system, the method comprising:
- measuring an electrical quantity or a portion of a storage portion between a first electrode and a second electrode, the portion of the storage portion configured to store an aerosol-forming substrate between the first electrode and the second electrode;
- determining a rate of change of the measured electrical quantity of the portion of the storage portion; and
- detecting a draw on the aerosol-generating system based on the rate of change of the measured electrical quantity of the portion of the storage portion.
| 2399636 | May 1946 | Keith |
| 3326043 | June 1967 | Roeske |
| 3952182 | April 20, 1976 | Flanders |
| 4417473 | November 29, 1983 | Tward et al. |
| 4646569 | March 3, 1987 | Cosser |
| 4922901 | May 8, 1990 | Brooks et al. |
| 5083383 | January 28, 1992 | Heger |
| 5095921 | March 17, 1992 | Losee et al. |
| 5530225 | June 25, 1996 | Hajaligol |
| 5865185 | February 2, 1999 | Collins et al. |
| 6273342 | August 14, 2001 | Terada et al. |
| 6474156 | November 5, 2002 | Endo et al. |
| 7779831 | August 24, 2010 | Von Hollen |
| 9668522 | June 6, 2017 | Memari et al. |
| 9681688 | June 20, 2017 | Rinehart et al. |
| 9993025 | June 12, 2018 | Alarcon |
| 10588176 | March 10, 2020 | Marsh et al. |
| 10687552 | June 23, 2020 | Zinovik et al. |
| 10757976 | September 1, 2020 | Mironov et al. |
| 10952473 | March 23, 2021 | Bessant et al. |
| 11006668 | May 18, 2021 | Mironov et al. |
| 11013268 | May 25, 2021 | Bessant et al. |
| 11363682 | June 14, 2022 | Mironov et al. |
| 11602019 | March 7, 2023 | Reevell |
| 11837975 | December 5, 2023 | Kubota et al. |
| 20030000303 | January 2, 2003 | Livingston et al. |
| 20040029366 | February 12, 2004 | Jakoby |
| 20050016549 | January 27, 2005 | Banerjee et al. |
| 20050229700 | October 20, 2005 | Chai et al. |
| 20070216424 | September 20, 2007 | Sieh et al. |
| 20090199635 | August 13, 2009 | Jacobson et al. |
| 20100074602 | March 25, 2010 | Israelsohn et al. |
| 20110083504 | April 14, 2011 | Unger |
| 20110113878 | May 19, 2011 | Ohshima et al. |
| 20110240475 | October 6, 2011 | Hother et al. |
| 20120199663 | August 9, 2012 | Qiu |
| 20130066168 | March 14, 2013 | Yang |
| 20130192615 | August 1, 2013 | Tucker et al. |
| 20130319435 | December 5, 2013 | Flick |
| 20130341218 | December 26, 2013 | Liu |
| 20140000638 | January 2, 2014 | Sebastian et al. |
| 20140041655 | February 13, 2014 | Barron et al. |
| 20140150810 | June 5, 2014 | Hon |
| 20140191054 | July 10, 2014 | Hingley et al. |
| 20140290650 | October 2, 2014 | Ivey |
| 20140352428 | December 4, 2014 | Kato |
| 20150122015 | May 7, 2015 | Leppard |
| 20150181945 | July 2, 2015 | Tremblay |
| 20150189919 | July 9, 2015 | Liu |
| 20150208729 | July 30, 2015 | Monsees et al. |
| 20150235546 | August 20, 2015 | Stapleford |
| 20150257445 | September 17, 2015 | Henry, Jr. |
| 20150257448 | September 17, 2015 | Lord |
| 20150366266 | December 24, 2015 | Chen |
| 20160025545 | January 28, 2016 | Saltzgiver et al. |
| 20160029698 | February 4, 2016 | Xiang |
| 20160106936 | April 21, 2016 | Kimmel |
| 20160158782 | June 9, 2016 | Henry, Jr. et al. |
| 20160192712 | July 7, 2016 | Memari et al. |
| 20160213065 | July 28, 2016 | Wensley |
| 20160235122 | August 18, 2016 | Krietzman |
| 20160310684 | October 27, 2016 | McCullough |
| 20160338407 | November 24, 2016 | Kerdemelidis |
| 20160345628 | December 1, 2016 | Sabet |
| 20170020197 | January 26, 2017 | Cameron |
| 20170027229 | February 2, 2017 | Cameron |
| 20170027233 | February 2, 2017 | Mironov |
| 20170048927 | February 16, 2017 | Murison et al. |
| 20170048930 | February 16, 2017 | Marsh et al. |
| 20170064997 | March 9, 2017 | Murison et al. |
| 20170099878 | April 13, 2017 | Murison et al. |
| 20170156397 | June 8, 2017 | Sur et al. |
| 20170231276 | August 17, 2017 | Mironov et al. |
| 20170231278 | August 17, 2017 | Mironov et al. |
| 20170245552 | August 31, 2017 | Reevell |
| 20170295846 | October 19, 2017 | Liu |
| 20180049469 | February 22, 2018 | Kaufman et al. |
| 20180177238 | June 28, 2018 | Bessant et al. |
| 20180242644 | August 30, 2018 | Bessant et al. |
| 20210199432 | July 1, 2021 | Bessant et al. |
| 20210251295 | August 19, 2021 | Mironov et al. |
| 20210293600 | September 23, 2021 | Bessant et al. |
| 20220248503 | August 4, 2022 | Mironov et al. |
| 20230209662 | June 29, 2023 | Reevell |
| 2013214984 | August 2014 | AU |
| 2940096 | November 2015 | CA |
| 103338664 | October 2013 | CN |
| 104010529 | August 2014 | CN |
| 104413544 | March 2015 | CN |
| 104799438 | July 2015 | CN |
| 204579886 | August 2015 | CN |
| 204838003 | December 2015 | CN |
| 204949519 | January 2016 | CN |
| 105939625 | September 2016 | CN |
| 205667358 | November 2016 | CN |
| 106455704 | February 2017 | CN |
| 106455707 | February 2017 | CN |
| 110248562 | September 2019 | CN |
| 19645970 | May 1998 | DE |
| 12481 | October 2009 | EA |
| 0516293 | December 1992 | EP |
| 2399636 | December 2011 | EP |
| 2399696 | December 2011 | EP |
| 2468116 | June 2012 | EP |
| 2756859 | July 2014 | EP |
| 2493342 | December 2014 | EP |
| 2959786 | December 2015 | EP |
| 3413734 | November 2021 | EP |
| 3003442 | September 2014 | FR |
| 1071656 | June 1967 | GB |
| 2533652 | June 2016 | GB |
| 9851/CHENP/2011 | May 2013 | IN |
| S55-147342 | November 1980 | JP |
| 58066719 | April 1983 | JP |
| S59-111031 | June 1984 | JP |
| H04-350550 | December 1992 | JP |
| H11-033097 | February 1999 | JP |
| 2007-218797 | August 2007 | JP |
| 2009-150738 | July 2009 | JP |
| 2009-295329 | December 2009 | JP |
| 2010-097740 | April 2010 | JP |
| 2014-501107 | January 2014 | JP |
| 2014-527614 | October 2014 | JP |
| 2014-232002 | December 2014 | JP |
| 2015-512262 | April 2015 | JP |
| 2015-524257 | August 2015 | JP |
| 2015-532136 | November 2015 | JP |
| 2017-510270 | April 2017 | JP |
| 10-2012-0080286 | July 2012 | KR |
| 10-2012-0080287 | July 2012 | KR |
| 10-2015-0064754 | June 2015 | KR |
| 2517125 | May 2014 | RU |
| 2573948 | January 2016 | RU |
| 2604012 | December 2016 | RU |
| 2014/120479 | August 2014 | WO |
| 2014159982 | October 2014 | WO |
| 2015/128665 | September 2015 | WO |
| WO-2015/140312 | September 2015 | WO |
| WO 2015/151053 | October 2015 | WO |
| 2015/167000 | November 2015 | WO |
| WO-2015/177046 | November 2015 | WO |
| WO-2015/177257 | November 2015 | WO |
| WO-2016/150922 | September 2016 | WO |
| WO-2017/045897 | March 2017 | WO |
| 2017/137512 | August 2017 | WO |
| 2017137505 | August 2017 | WO |
| 2017/214517 | December 2017 | WO |
| 2018/114849 | June 2018 | WO |
| 2018158081 | September 2018 | WO |
- U.S. Appl. No. 15/429,651, claiming priority to U.S. Appl. No. 15/429,651.
- First Office Action and Search Report dated Sep. 2, 2020 in Chinese Application No. 201780006966.8.
- Notice of Allowance dated Feb. 4, 2021 issued in corresponding Japanese Patent Application No. 2018-540739.
- Notice of Allowance dated Apr. 28, 2023 issued in related U.S. Appl. No. 17/728,154.
- U.S. Office Action for U.S. Appl. No. 17/306,192, dated Jul. 31, 2023.
- Office Action dated Oct. 5, 2023 issued in related U.S. Appl. No. 17/728,154.
- Notice of Allowance dated Oct. 27, 2023 issued in related U.S. Appl. No. 18/298,757.
- Office Action dated Nov. 24, 2023 issued in related U.S. Appl. No. 18/298,757.
- U.S. Office Action dated Oct. 6, 2022 for corresponding U.S. Appl. No. 17/728,154.
- Notice of Allowance dated Jul. 20, 2023 issued in related Korean patent application No. 10-2019-7016364.
- European Search Report for Application No. EP16155565 dated Aug. 9, 2016.
- International Search Report and Written Opinion for corresponding International Application No. PCT/EP2017/052902 dated Apr. 24, 2017.
- International Preliminary Report on Patentability issued Apr. 30, 2018 in International Application No. PCT/EP2017/052902.
- Russian Notice of Allowance and Search Report for corresponding Application No. 2018129581, dated Mar. 5, 2020, English translation thereof.
- Written Opinion of the International Preliminary Examining authority issued Jan. 26, 2018 in International Application No. PCT/EP2017/052902.
- First Office Action issued Sep. 2, 2020 in Chinese Application No. 201780007223.2.
- Office Action dated Feb. 8, 2021 issued in corresponding Japanese Patent Application No. 2018-537765.
- Japanese Decision to Grant for corresponding Application No. 2018-537765, dated Jul. 12, 2021.
- Extended European Search Report #16206381.2 dated Jun. 9, 2017.
- Jacques Robert et al. “A Second-Order High-Resolution Incremental A/D Converter with Offset and Charge Injection Compensation”. IEEE Journal of Solid-State Circuits, vol. 23, No. 3. Jun. 1988. pp. 736-741.
- Alexander V. Mamishev et al. “Interdigital Sensors and Transducers”. Proceedings of the IEEE, vol. 92, No. 5. May 2004. pp. 808-845.
- David Wang, “TI Designs: Capacitive-Based Liquid Level Sensing Sensor Reference Design”. Texas Instruments Incorporated. Jan. 2015. pp. 1-23.
- International Preliminary Report and Written Opinion for corresponding PCT Application No. PCT/EP2017/083386 dated Jul. 4, 2019.
- Extended European Search Report #17158521.9 dated Sep. 13, 2017.
- International Preliminary Report on Patentability for International Application No. PCT/EP2018/053725 mailed on Sep. 12, 2019.
- International Search Report and Written Opinion for International Application No. PCT/EP2018/053725 mailed on May 18, 2018.
- European Office Action dated Oct. 8, 2020 issued in corresponding European Patent Application No. 18705147.9.
- U.S. Office Action dated Nov. 6, 2020 issued in co-pending U.S. Appl. No. 15/908,074.
- U.S. Office Action dated May 22, 2020 issued in co-pending U.S. Appl. No. 15/908,074.
- Notice of Allowance in co-pending U.S. Appl. No. 15/850,278 dated Nov. 30, 2020.
- U.S. Notice of Allowance dated Jan. 28, 2021 issued in co-pending U.S. Appl. No. 15/908,074.
- U.S. Office Action dated May 19, 2020 issued in U.S. Appl. No. 15/850,278.
- Russian Office action and Search report issued in Application No. 2019118259/03(034983), dated Apr. 19, 2021.
- Russian Office action and Search report issued in Application No. 2019126802, dated Jun. 4, 2021.
- Chinese Office Action dated Aug. 24, 2021 issued in corresponding Chinese Patent Application No. 201780073684. X. English translation is enclosed.
- Chinese Office Action dated Nov. 3, 2021 issued in corresponding Chinese Patent Application No. 201880009882.4. English translation has been included.
- Russian Decision to Grant for corresponding Application No. 2019118259/03(034983), dated Nov. 24, 2021, English translation has been included.
- Japanese Office Action dated Dec. 20, 2021 issued in corresponding Japanese Patent Application No. 2019-531461. English translation has been provided.
- Japanese Office Action dated Feb. 9, 2022 issued in Japanese Patent Application No. 2019-541785. English translation has been provided.
- Office Action dated Feb. 9, 2022 issued in corresponding Japanese Patent Application No. 2019-541785.
- Russian Decision to Grant for corresponding Application No. 2019126802/03(052556), dated Mar. 28, 2022, English translation has been included.
- Decision to Grant dated Aug. 1, 2022 issued in Japanese Patent Application No. 2019-531461. English translation has been provided.
- Japanese Notice of Allowance dated Nov. 24, 2022 for corresponding Japanese Application No. 2019-541785, and English-language translation thereof.
- Korean Office Action dated Nov. 1, 2022 for corresponding Korean Application No. 10-2019-7020653, and English-language translation thereof.
- Korean Office Action for corresponding Application No. 10-2019-7016364, dated Dec. 16, 2022, with English translation included.
- Korean Notice of Allowance for corresponding Application No. 10-2019-7020653, dated Jan. 13, 2023, with English Translation.
- Notice of Allowance dated Feb. 20, 2024 issued in corresponding U.S. Appl. No. 17/728,154.
- Office Action issued Feb. 1, 2024 in Japanese Application No. 2022-206266.
- Decision to grant issued Apr. 4, 2024 in Japanese Application No. 2022-206266.
- Notice of Allowance dated Apr. 10, 2024 issued in U.S. Appl. No. 18/298,757.
- Notice of Allowance dated May 16, 2024 issued in U.S. Appl.No. 17/728,154.
- Office Action dated May 1, 2024 issued in Korean patent application No. 2018-7021321.
- Office Action dated Aug. 29, 2024 issued in U.S. Appl. No. 17/230,463.
- Notice of Allowance dated Sep. 4, 2024 issued in U.S. Appl. No. 18/298,757.
- Written Decision on Registration issued Aug. 6, 2024 in Korean Application No. 10-2018-7021321.
- Notice of Allowance dated Sep. 4, 2024 issued in U.S. Appl. 18/728,154.
- Office Action dated Oct. 23, 2024 issued in U.S. Appl. No. 17/728,154.
- Office Action dated Oct. 23, 2024 issued in U.S. Appl. No. 18/298,757.
- Notice of Allowance issued Nov. 18, 2024 in U.S. Appl. No. 17/204,490.
- Office Action dated Nov. 27, 2024 issued in U.S. Appl. No. 18/322,027.
- Notice of Allowance dated May 10, 2024 issued in U.S. Appl. No. 18/298,757.
- U.S. Office Action for U.S. Appl. No. 17/306,192, dated May 13, 2024.
- U.S. Office Action for U.S. Appl. No. 17/204,490, dated Aug. 1, 2024.
- U.S. Office Action for U.S. Appl. No. 18/322,027, dated Aug. 6, 2024.
- Office Action dated Dec. 1, 2024 issued in Korean patent application No. 10-2024-7036990.
- Office Action dated Jan. 28, 2025 issued in U.S. Appl. No. 17/230,463.
- Notice of Allowance dated Feb. 6, 2025 issued in U.S. Appl. No. 17/204,490.
- Notice of Allowance dated Feb. 6, 2025 issued in U.S. Appl. No. 18/298,757.
- Notice of Allowance dated Feb. 7, 2025 issued in U.S. Appl. No. 17/728,154.
- Notice of Allowance dated Dec. 16, 2024 issued in Korean patent application No. 10-2018-70210008.
- Notice of Allowance dated Aug. 14, 2025 issued in U.S. Appl. No. 17/233,746.
- Notice of Allowance dated Aug. 28, 2025 issued in U.S. Appl. No. 18/322,027.
- Office Action dated Sep. 16, 2025 issued in U.S. Appl. No. 18/318,196.
- Notice of Allowance dated Apr. 1, 2025 issued in Korean patent application No. 10-2024-7036990.
- Notice of Allowance dated Apr. 23, 2025 issued in U.S. Appl. No. 17/204,490.
- Notice of Allowance dated May 12, 2025 issued in U.S. Appl. No. 17/230,463.
- Office Action dated May 14, 2025 issued in U.S. Appl. No. 18/185,775.
- Notice of Allowance dated Apr. 24, 2025 issued in U.S. Appl. No. 17/728,154.
- Notice of Allowance dated Apr. 28, 2025 issued in U.S. Appl. No. 18/298,757.
- Notice of Allowance dated Jun. 24, 2025 issued in U.S. Appl. No. 17/204,490.
- Office Action dated Apr. 3, 2025 issued in U.S. Appl. No. 17/306,192.
- Notice of Allowance dated Jun. 2, 2025 issued in U.S. Appl. No. 17/204,490.
- Office Action dated Jun. 3, 2025 issued in U.S. Appl. No. 17/728,154.
- Office Action dated Jun. 3, 2025 issued in U.S. Appl. No. 18/298,757.
- Office Action dated Mar. 29, 2025 issued in Chinese Patent Application No. 202210914458.2.
- Notice of Allowance dated Jan. 2, 2026 issued in U.S. Appl. No. 17/204,490.
- Notice of Allowance dated Dec. 3, 2025, issued in U.S. Appl. No. 17/230,463.
- Notice of Allowance dated Dec. 12, 2025, issued in U.S. Appl. No. 17/204,490.
- Final Office Action issued Dec. 1, 2025 in U.S. Appl. No. 18/185,775.
- Office Action and search report issued on Oct. 17, 2025 in Russian application No. 2022114504/03.
- Final Office Action issued Oct. 27, 2025 in U.S. Appl. No. 17/306,192.
- Final Office Action issued Mar. 11, 2026 in U.S. Appl. No. 18/318,196.
- Russian Notice of Allowance for corresponding Application No. 2022114504, dated Mar. 23, 2026, English translation thereof.
- International Search Report for corresponding International application No. PCT/EP2017/052921 dated May 17, 2017.
- European Search Report for European Patent Application No. 16155568.5 dated Aug. 9, 2016.
- Russian Notice of Allowance and Search Report for corresponding Application No. 2018132263, dated Feb. 28, 2020, English translation thereof.
Type: Grant
Filed: Aug 29, 2022
Date of Patent: Jul 21, 2026
Assignee: Altria Client Services LLC (Richmond, VA)
Inventors: Oleg Mironov (Neuchatel), Ihar Nikolaevich Zinovik (Peseux), Jerome Christian Courbat (Neuchatel), Tony Reevell (London)
Primary Examiner: Elizabeth L McKane
Application Number: 17/897,831
International Classification: H05B 3/44 (20060101); A24F 40/10 (20200101); A24F 40/40 (20200101); A24F 40/50 (20200101); H05B 1/02 (20060101);
