Filter Clogging Patents (Class 340/607)
  • Patent number: 10404775
    Abstract: A monitoring system for apparatus and systems in commercial and residential properties is provided. The monitoring system consists of a head unit and a tail unit, each of which has one or more sensors that measure performance parameters that are important to understanding the performance of the apparatus and system being monitored. As an example, an HVAC system may be monitored to determine when an air filter needs to be changed, or to predict when failure of the HVAC system may be imminent. The sensor array in the head unit and tail unit measure performance and report alerts and historical system performance to users through a mobile app, social media accounts, or any other system for communicating over a wired or wireless network connection.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: September 3, 2019
    Inventors: Tim Seaton, Tommi Parkkila
  • Patent number: 10364994
    Abstract: The present application relates to an apparatus for purifying and/or humidifying air, and a related method for purifying and/or humidifying air. The apparatus comprises a rotary filter (1), a fan (9, 10) for passing air through the rotary filter (1), and a reservoir (4, 5), and wherein the rotation speed of the rotary filter (1) and the settings of the fan (9, 10) depend on the ambient relative humidity and ambient gas pollutant concentration. The apparatus combines the feature of chemisorption with the use of a rotary filter (1), thereby providing an apparatus which is able to purify air and/or regulate the ambient humidity based on humidity levels and levels of a target gas pollutant in the air. The invention removes the need for a pump for liquid transport, removes the need for frequent and expensive filter changes by the user, and instead only requires the user to periodically refresh the filtration solution in the reservoir (4, 5).
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: July 30, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Declan Patrick Kelly, Weizhong Chen, Johan Marra, Cornelis Reinder Ronda, John Robert McGarva, Xuan Zhang, Jan Frederik Suijver, Jean-Paul Jacobs
  • Patent number: 10065143
    Abstract: The present disclosure is a filtration monitoring system. Filtration monitoring system may include a sensor configured to measure a characteristic of usage of a monitored filter. The sensor may be communicatively coupled to a controller which is configured to transfer measured data to a server of the filter monitoring system. Server may be configured to store historical data regarding representative filter usage and may determine a predicted expiration time for a monitored filter which may be adjusted based upon the measured data from the sensor.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: September 4, 2018
    Assignee: Complete Filter Management LLC
    Inventor: Michael B. Beier
  • Patent number: 10030567
    Abstract: An exhaust gas purification device, including a diesel particulate filter (“DPF”) for collecting particulate matter contained in an exhaust gas, a forced regeneration unit or performing forced regeneration, a capacitance detection unit for detecting a capacitance of the DPF, a total accumulated amount estimation unit for estimating a total amount of accumulated particulate matter and ash collected in the DPF on the basis of the detected capacitance, and an ash accumulated amount calculation unit for calculating an amount of accumulated ash by using, as the amount of accumulated ash, the total amount of accumulation which is estimated when the forced regeneration finishes.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: July 24, 2018
    Assignee: ISUZU MOTORS LIMITED
    Inventors: Mitsuhiro Aso, Tadashi Uchiyama
  • Patent number: 9920947
    Abstract: A filter condition indicator system is described herein. A pressure differential switch monitors air pressure across a filter, and a transmitter coupled to the pressure differential switch sends a signal to a networked device. If the pressure differential near the filter triggers the switch, then a “dirty” signal is sent to or retrieved by a mobile device which indicates that the filter is dirty and should be replaced. The filter condition indicator is able to be used by bypassing a thermostat and sending an alert to a computer or mobile device wirelessly. Alternatively, the filter condition indicator system described herein is able to be used in conjunction with a previously installed furnace/thermostat system by utilizing the pre-existing thermostat wiring. The filter condition indicator system is able to be used with HVAC systems, air conditioning systems, other heating/cooling systems, or other systems or devices.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: March 20, 2018
    Assignee: BD Technology Partners
    Inventor: Stewart Breslin
  • Patent number: 9702802
    Abstract: There is described a filter arrangement for a particle detector for detecting particles in an environment. The particle detector can include one or more sensors for analyzing fluid in a detection region to produce sensor output. The filter arrangement includes structure defining flow paths, for conveying fluid from the environment towards the detection region, including a first flow path, which includes a filter, and a second flow path bypassing the filter. There is also provided a mechanism for controlling relative flow rates of fluid through the first flow path and the second flow path and a controller configured to receive the sensor output corresponding to at least two relative flow rates and apply logic thereto to generate an output indicative of a condition of the filter.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: July 11, 2017
    Assignee: Garrett Thermal Systems Limited
    Inventors: Kemal Ajay, Nitin Vayeda
  • Patent number: 9651294
    Abstract: An outdoor unit of an air conditioner includes: an outdoor fan; an outdoor air temperature detector; and a controller, wherein the controller performs: a fan defrost operation to circulate the refrigerant in the same order as in the case of a cooling operation and rotate the outdoor fan when the outdoor air temperature is within a predetermined temperature range, a fan defrost operation over a period of a first fan defrost operation time when the outdoor air temperature is lower than a first predetermined temperature, and a fan defrost operation over a period of a second fan defrost operation time that is longer than the first fan defrost operation time when the outdoor air temperature is equal to or higher than a second predetermined temperature that is higher than the first predetermined temperature.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: May 16, 2017
    Assignee: FUJITSU GENERAL LIMITED
    Inventors: Takashi Kimura, Kuniko Hayashi
  • Patent number: 9546942
    Abstract: A method for estimating energy use in an air filtration system using a preselected air filter includes the steps of: entering filtration system information into a computer having access to dust holding capacity—pressure drop curves for a plurality of air filters; determining an estimated current energy use of the air filtration system for a current air filter in the system; and presenting the estimated energy use on a display of the computer. Proposed filters can be evaluated and filter operation and changing cycle can be optimized.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: January 17, 2017
    Assignee: LPD Technologies, Inc.
    Inventors: Dirk ter Horst, Hans-Joachim Lippold
  • Patent number: 9526211
    Abstract: An agricultural harvesting system including a chassis, an agricultural product moving device coupled to the chassis, an airflow system, a cleaning system and an airflow characterizing system. The cleaning system is configured to receive the agricultural product from the moving device. The cleaning system is configured to receive an airflow from the airflow system. The airflow characterizing system is at least partially positioned in the airflow, and is configured to measure an airflow profile across the cleaning system. The airflow characterizing system includes a plurality of sensors that determine airflow by measuring a thermal transfer from the sensors to the airflow. The airflow characterizing system being configured to maintain a substantially constant electrical resistance of the sensors as the airflow varies. The airflow characteristics are measured in the cleaning system and are used to improve the cleaning capacity of the harvesting system.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: December 27, 2016
    Assignee: CNH Industrial America LLC
    Inventors: Craig E. Murray, Tyler L. Nelson, Eric E. Veikle, Kevin S. Schwinn
  • Patent number: 9456780
    Abstract: Systems for delivery of therapeutic agents and related methods are disclosed. A sensing system is configured to detect a chemical in the vicinity of a patient and transmit a signal to a controller upon detection. A controller is configured to release a therapeutic agent which is transported to the site of interest. The controller communicates with an electronic medical records database, an alarm and a nurse call system.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: October 4, 2016
    Assignee: Hill-Rom Services, Inc.
    Inventors: David L. Ribble, Laetitia Gazagnes, Charles A. Lachenbruch
  • Patent number: 9403110
    Abstract: A filter assembly has a qualified filter element that filters fuel, a filter housing for the qualified filter element and a water-in-fuel sensor that senses presence of water in the filter housing. An electrical resistance of the water-in-fuel sensor changes based upon whether the qualified filter element is installed in the housing. A filter assembly can also have a plurality of magnetic elements disposed on at least one of the filter housing and the qualified filter element. A plurality of wires are disposed on at least the other of the filter housing and the qualified filter element. The control circuit determines that the qualified filter element is installed in the filter housing based on a change in the electrical current in the plurality of wires.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: August 2, 2016
    Assignee: CUMMINS FILTRATION IP, INC.
    Inventors: Jared M. Gwin, Sainath Reddy Racha, Gregory D. Shope, Yiming Z. Jiang
  • Patent number: 9207727
    Abstract: A method of determining a condition of a filter located within a system is provided. The method may include determining a first air flow measurement value for a first air flow through the filter, determining a first energy consumption value associated with generating the first air flow through the filter, determining a first ratio between the first air flow measurement value and the first energy consumption value, determining a second air flow measurement value for a second air flow through the filter, determining a second energy consumption value associated with generating the second air flow through the filter, and determining a second ratio between the second air flow measurement value and the second energy consumption value. The filter may then be replaced based on a comparison between the determined first and the determined second ratio.
    Type: Grant
    Filed: February 24, 2014
    Date of Patent: December 8, 2015
    Assignee: Lenovo Enterprise Solutions (Singapore) Pte. Ltd.
    Inventors: Nicholas J. Balogh, Gordon B. Grout, Kobina K. Inkumsah, Robert H. Johnson, Jr.
  • Patent number: 9120043
    Abstract: A filter life sensor assembly within an air handling system is disclosed. The air handling system includes an air flow intake, an air flow exit, and a filter disposed between the air flow intake and air flow exit. The filter sensor assembly comprises a bypass connecting the air flow intake to the air flow exit, a dielectric sensor adjacent the bypass, wherein the dielectric sensor generates an electrical signal in response the air flow passing through the bypass.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: September 1, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Ronald C. Johansson, Vivek Bharti
  • Patent number: 9000944
    Abstract: A mechanical fluid meter, for liquid or gas, includes an electronic device (E) that has means for metering, and generally also displaying, consumption, said fluid meter including: at least one fluid temperature sensor (3) near the meter and at least one ambient temperature sensor (4) where the meter is installed; a connection means between the temperature sensors (3, 4) and the electronic device (E); and analysis means (5) for establishing the temperature difference (??) between the fluid temperature and the ambient temperature and for taking into account the fluid flow rate value supplied by the meter, said analysis means being programmed so as to display and/or transmit information indicating a meter blockage when the temperature difference (??) is higher than a predetermined limit and the flow rate value supplied by the meter is zero.
    Type: Grant
    Filed: October 11, 2010
    Date of Patent: April 7, 2015
    Assignee: Suez Environnement
    Inventor: Jean-Paul Borlee
  • Patent number: 8791826
    Abstract: A method for fire detection in enclosed environments (1) subject to explosion protection regulations out of which an air-dust mixture is filtered while the concentration of dust of the air-dust mixture is lowered to under the explosion limit by a filter (2) and the aspirated air-dust mixture is checked for burning characteristics and if appropriate a fire alarm is triggered, in which the function of the filter (2) is monitored, the fire detection is carried out by use of an aspirating smoke detector system (7) not approved for use in potentially explosive areas but instead is deployed outside the ex-zone and if the filter (2) is destroyed a signal processing unit (15, 15.1) of a malfunction monitoring sensor (14) generates a signal which initiates a subsequent action preventing aspirated air-dust mixture with an elevated concentration of dust from entering the aspirating smoke detector system (7).
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: July 29, 2014
    Assignee: Minimax GmbH & Co. KG
    Inventors: Manfred Russwurm, Torsten Westphal, Thomas Mendle, Olaf Klischat, Bernd Ziems, Hauke Dittmer, Kurt Lenkeit
  • Patent number: 8704672
    Abstract: Methods and systems for indicating a status of an air filter of an HVAC system may include receiving a measure that is related to an amount of flow restriction presented by the air filter in an HVAC system, using the measure to determine whether the air filter does not need replacing, the air filter needs to be replaced soon, or the air filter should be replaced now, and displaying on a display of an HVAC controller an air filter status indicator, wherein the air filter status indicator includes a stop-light metaphor. In one example, the air filter status indicator may display a green color when the air filter does not need replacing, display a yellow color when the air filter needs to be replaced soon, and display a red color when the air filter should be replaced now. In some cases, the air filter status indicator may also include a qualitative term indicative of the current status of the air filter.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: April 22, 2014
    Assignee: Honeywell International Inc.
    Inventors: Steven Hoglund, Reed Bisson, Amy Ragland, Barbara Dean-Hendricks, Christopher Goh, Robert Bick
  • Patent number: 8681010
    Abstract: An improved pump, reservoir and reservoir piston are provided for controlled delivery of fluids. A motor is operably coupled to a drive member, such as a drive screw, which is adapted to advance a plunger slide in response to operation of the motor. The plunger slide is removably coupled to the piston. A method, system, and an article of manufacture for automatically detecting an occlusion in a medication infusion pump is provided. The electrical current to an infusion pump is measured. Based on a series of measurements of one or more variables, the infusion pump detects whether there is an occlusion in the system.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: March 25, 2014
    Assignee: Medtronic Minimed, Inc.
    Inventors: Sheldon B. Moberg, Ian B. Hanson, Cary D. Talbot
  • Patent number: 8580008
    Abstract: The invention hereby disclosed is a vertical filtering and separating suction machine of chips, steam and smoke for machining center, lathe machine or other machines, which operates by sudden changes of sucked air, thus generating hits which separate heavy particles, whose suction pipe extends almost up to the bottom of the rotor, which only uses filters at the end of the process of air purification, whose rotor has outer paddles modified in order to improve suction power and to cause more hits of air flow, and which includes an air pressure alarm showing the filter is saturated.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: November 12, 2013
    Inventor: Tomio Ota
  • Patent number: 8487776
    Abstract: Automatic devices that determine when pollutant deposits have accumulated in ductwork may be employed to notify maintenance personnel or automated cleaning equipment of the need for ducts to cleaned or replaced. Various detection devices may be employed to detect a property of accumulated grease and generate an indication of an accumulation. The detection device may present a surface to the fume stream inside a duct. The surface may be cooled to a temperature that represents a worst case temperature so that the accumulation due to condensation on the detector surface is at least as high as the coolest surface in the ductwork which is being monitored. Alternatively, the detection device may be located external to the duct. The detection device may interrogate the surface of the duct through contact or noncontact measurements to determine the thickness of an accumulated grease layer on the interior of the duct.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: July 16, 2013
    Assignee: Oy Halton Group Ltd.
    Inventors: Andrey V. Livchak, Derek W. Schrock
  • Patent number: 8392034
    Abstract: The invention provides an electronic apparatus including a casing, a thermal sensor, a controlling unit, an air filter and a cooling fan. The air filter is detachably attached to the inlet of the casing. When the air filter is attached to the inlet of the casing, a partial structure of the air filter neighboring the thermal sensor blocks an airflow from flowing through the thermal sensor. In particular, when the air filter is attached to the inlet of the casing, or when the air filter is not attached to the inlet of the casing, the controlling unit always calculates a determined speed by applying the temperature sensed by the thermal sensor in a function of speed versus temperature, and controls the cooling fan operating under the determined speed to cool the electronic apparatus.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: March 5, 2013
    Assignee: Qisda Corporation
    Inventor: Chi-Hung Hsiao
  • Publication number: 20120318738
    Abstract: An autonomous filter device and a method for improving the filter life and performance is disclosed. The filter element is equipped with one or more sensors, adapted to measure one or more characteristics. In response to the measured characteristic, the control logic within the filter element is able to determine an appropriate response. For example, the control logic may determine that a sudden, but temporary, blockage has occurred in the filter membrane. In response, the control logic may initiate a specific response designed to alleviate the blockage. The control logic will then determine the success of the response, based monitoring any change in the fluid characteristics. Based thereon, the control logic may alert the operator that the filter element must be replaced. Alternatively, if the response was successful in correcting the blockage, the control logic need not notify the operator, as the filter element is back to normal operating operation.
    Type: Application
    Filed: August 13, 2012
    Publication date: December 20, 2012
    Applicant: EMD MILLIPORE CORPORATION
    Inventors: Aaron Burke, Anthony DiLeo, Timothy O'Brien
  • Publication number: 20120319851
    Abstract: Methods and systems for indicating a status of an air filter of an HVAC system may include receiving a measure that is related to an amount of flow restriction presented by the air filter in an HVAC system, using the measure to determine whether the air filter does not need replacing, the air filter needs to be replaced soon, or the air filter should be replaced now, and displaying on a display of an HVAC controller an air filter status indicator, wherein the air filter status indicator includes a stop-light metaphor. In one example, the air filter status indicator may display a green color when the air filter does not need replacing, display a yellow color when the air filter needs to be replaced soon, and display a red color when the air filter should be replaced now. In some cases, the air filter status indicator may also include a qualitative term indicative of the current status of the air filter.
    Type: Application
    Filed: June 20, 2011
    Publication date: December 20, 2012
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Steven Hoglund, Reed Bisson, Amy Ragland, Barbara Dean-Hendricks, Christopher Goh, Robert Bick
  • Patent number: 8334783
    Abstract: A projection display device includes: a dustproof filter that removes dust and a foreign material from drawn air; an air guide path that guides, to a liquid crystal panel, the cooling air blown by a suction fan; an air velocity detector that is arranged in the air guide path and detects the velocity of the cooling air that flows in the air guide path; and a CPU that determines, on the basis of the value detected by the air velocity detector, whether or not the dustproof filter is clogged. The air velocity detector detects the velocity of the cooling air by measuring the temperature of the air in the vicinity of the heat generating element that will be increased due to heat transfer generated by the heat generating element. This configuration improves accuracy in determining whether or not the dustproof filter is clogged.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: December 18, 2012
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Takeshi Katayama, Miyuki Ikeda, Hirotoshi Kemi, Hideharu Saito
  • Patent number: 8314710
    Abstract: The present invention relates to a system for determining particle transmittance Tx of a filter for use with a particle detection system to provide a filter warning for aspirated particle detection systems by detecting a level of first particles having a size indicative of smoke particles and which pass through the detection system; determining an integrated smoke hours value by integrating the detected level of first particles over time; estimating the smoke particle transmittance Tx of the filter by applying a predetermined weighting operation to the integrated smoke hours value. An empirical measure of a filter's particle transmittance Tx, due to at least first particles having a size indicative of smoke particles may be achieved by way of integrating a level of such first particles passing through a particle detection system over time to determine the proportion of smoke particles arrested by a filter, “integrated smoke hours”.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: November 20, 2012
    Assignee: Vision Fire & Security Pty Ltd
    Inventors: Ron Knox, Karl Boettger
  • Patent number: 8289179
    Abstract: A vibratory flow meter (100) for correcting for entrained gas in a flow material is provided. The vibratory flow meter (100) comprises a flow meter assembly (10) configured to generate a vibrational response for the flow material, a bubble size sensor (50) configured to generate a bubble measurement signal for the flow material, and meter electronics (20) coupled to the flow meter assembly (10) and to the bubble size sensor (50). The meter electronics (20) is configured to receive the vibrational response and the bubble measurement signal, determine a bubble size of bubbles in the flow material using at least the bubble measurement signal, determine one or more flow characteristics of the flow material using at least the vibrational response and the bubble size.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: October 16, 2012
    Assignee: Micro Motion, Inc.
    Inventors: Joel Weinstein, Mark James Bell
  • Patent number: 8169551
    Abstract: The present invention provides a method for adjusting a center frequency of a filter utilized for extracting information carried via a target channel. The method includes: detecting adjacent channel interference (ACI) for the target channel to generate a channel interference information; and adjusting the center frequency of the filter for the target channel according to the channel interference information.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: May 1, 2012
    Assignee: Himax Technologies Limited
    Inventor: Jeng-Shiann Jiang
  • Patent number: 8084259
    Abstract: The present invention describes a system for accurately measuring the concentration of a substance within a filter housing. A concentration sensor and a communications device are coupled so as to measure and transmit the concentration of a particular substance within the filter housing while in use. This system allows the operator to certify the integrity of the filters within the filter housing at the customer site without additional equipment. In one embodiment, a tracer gas, such as helium or hydrogen, is added to a carrier and injected into the system. The concentration of tracer gas at a specific operating transmembrane pressure is indicative of bubble pointing specific pores in the filter. This test will give a more sensitive indication of the bubble point and the presence of defects than a standard diffusion test. In a second embodiment, two gasses, in a known ratio, are introduced into the filter housing.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: December 27, 2011
    Assignee: Millipore Corporation
    Inventor: Anthony DiLeo
  • Patent number: 8059004
    Abstract: Disclosed is a drain blockage responsive alarm system. The drain blockage responsive alarm system comprises a cleanout cap member, at least one drain blockage responsive element, and an alarming module. The cleanout cap member is capable of being installed at a portion of a drain pipe. Further, the at least one drain blockage responsive element is configured to the cleanout cap member adapted to sense clog deposition at the portion of the drain pipe, and to generate an output signal upon sensing the clog deposition. Furthermore, the alarming module is electrically coupled to the at least one drain blockage responsive element for generating an alarm signal upon receiving the output signal.
    Type: Grant
    Filed: January 7, 2009
    Date of Patent: November 15, 2011
    Inventors: Eric James, Laura James
  • Patent number: 7879226
    Abstract: A flow indicator for showing blocking of filter cotton, being installed in a pipe line of a spraying head for the purpose of showing and controlling blocking of filter cotton in a filter in connecting with a submerged pump for the spraying head, it has a tri-branch tube to connect the pipe line, and to connect to a housing provided therein with an electric power source, an indicating device, an igniting switch and a triggering device, the tri-branch tube is provided therein with a pusher rod that can detect the pressure of water and can thus be moved. When the filter cotton is blocked to lower the water pressure, the pusher rod is moved and makes the triggering device to turn on the indicating lamp device, in order to warn a user to clean or change the filter cotton of the filter.
    Type: Grant
    Filed: February 18, 2008
    Date of Patent: February 1, 2011
    Assignee: Eiko Electric Products Corp.
    Inventor: Yu-Chin Wang
  • Patent number: 7868774
    Abstract: An oil leakage detector for detecting the leakage of e.g. diesel or fuel oil in an engine room of a vessel comprises a conduit for an airflow therethrough, and a screen in the conduit. The screen is meshed to prevent oil particles or droplets from passing therethrough. A sensor determines a pressure loss across the screen, and a control system operatively connected to the sensor is configured to output an oil leakage warning signal if the pressure loss exceeds a predetermined threshold value. A fan may be provided for generating the airflow through the conduit. A gas sensor for determining the presence of hydrocarbon, carbon monoxide or carbon dioxide is optionally provided.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: January 11, 2011
    Assignee: Daspos A/S
    Inventor: Torben Jorgensen
  • Patent number: 7791475
    Abstract: An apparatus includes a mounting base and a compatible electrical unit removably carried on the base. The base carries a transducer and a sensor external to the unit. The transducer emits radiant energy toward the unit. The sensor receives radiant energy modulated by the unit. A local control unit can store the received, modulated radiant energy as a base-line profile. Subsequently, additional profiles can be generated and compared to the stored base-line to determine is a spatial characteristic of the electrical unit has changed.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: September 7, 2010
    Assignee: Honeywell International Inc.
    Inventor: Rob Clow
  • Patent number: 7777633
    Abstract: The present invention relates to a system for determining particle transmittance Tx of a filter for use with a particle detection system to provide a filter warning for aspirated particle detection systems by detecting a level of first particles having a size indicative of smoke particles and which pass through the detection system; determining an integrated smoke hours value by integrating the detected level of first particles over time; estimating the smoke particle transmittance Tx of the filter by applying a predetermined weighting operation to the integrated smoke hours value. An empirical measure of a filter's particle transmittance Tx, due to at least first particles having a size indicative of smoke particles may be achieved by way of integrating a level of such first particles passing through a particle detection system over time to determine the proportion of smoke particles arrested by a filter, “integrated smoke hours”.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: August 17, 2010
    Assignee: Vision Fire & Security Pty Ltd
    Inventors: Ron Knox, Karl Boettger
  • Patent number: 7726186
    Abstract: A thermal management system includes an airflow sensor that measures airflow in an air path inside an enclosure to be cooled, wherein the air path includes a filter and a fan. A controller is responsive to the airflow sensor for monitoring the rate of airflow inside the enclosure and determining the condition of the filter. In one embodiment, the airflow sensor is an active type sensor, such as a thermistor, disposed on circuit boards. In further embodiments, the airflow sensor is disposed proximate a tube through the filter.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: June 1, 2010
    Assignee: Degree Controls, Inc.
    Inventor: Rajesh M. Nair
  • Patent number: 7713339
    Abstract: An air filter monitoring system for indicating when to clean or replace a flexible air filter includes an air filter having a peripheral frame and an interior filtering region, a fixed support structure for receiving the air filter and maintaining the perimeter of the filter frame in a generally fixed position while allowing the interior filtering region to flex in response to air flow through the filter, and a filter change indicator having a predetermined bias force. The filter change indicator is arranged to contact the interior filtering region of the filter, wherein when the predetermined bias force is reached, the filter change indicator is activated to notify a user to clean or replace the filter.
    Type: Grant
    Filed: May 26, 2006
    Date of Patent: May 11, 2010
    Assignee: 3M Innovative Properties Company
    Inventor: Ronald C. Johansson
  • Patent number: 7640077
    Abstract: Static pressures are measured in an HVAC system and utilized to predict the condition of a filter in the HVAC system. As the filter becomes clogged, the static pressure can be expected to increase. Changes in the static pressure are determined periodically, and utilized to predict the condition of the filter. A display provides a user with an indication of the current condition of the filter, and a recommendation to replace the filter once it reaches a predetermined condition.
    Type: Grant
    Filed: November 4, 2005
    Date of Patent: December 29, 2009
    Assignee: Carrier Corporation
    Inventor: Rajendra K. Shah
  • Patent number: 7638042
    Abstract: A fluid treatment system is provided, the system including a fluid treatment cartridge for treating fluid passing therethrough. The cartridge has an inlet through which untreated fluid enters the cartridge and an outlet from which treated fluid exits the cartridge. The cartridge also has a radio frequency identification (RFID) tag for storing data. The fluid treatment system also includes a connection manifold configured to detachably support the fluid treatment cartridge. The connection manifold has an inlet flow path for directing untreated fluid to the inlet of the cartridge and an outlet flow path for directing treated fluid from the outlet of the cartridge, and a data sensor for reading data stored on the RFID tag. Data stored on the RFID tag can be read by the data sensor and evaluated. Use of the fluid treatment system can be deterred based upon the evaluated data.
    Type: Grant
    Filed: November 4, 2005
    Date of Patent: December 29, 2009
    Assignee: 3M Innovative Properties Company
    Inventors: Robert E. Astle, Hemang Patel, Mahesh Z. Patel, Thomas Holler, Karl Fritze
  • Patent number: 7527680
    Abstract: Data of a barometric pressure that a barometric pressure sensor outputs, and data of an air volume that an air-volume sensor outputs are input into a system control circuit. The system control circuit is provided with a table storing portion. In the table storing portion, a control table is stored. The control table is formed of a plus supplied-voltage value to fan power set by a barometric pressure value and an air-volume value, and a warning instruction. In a case that the warning instruction is selected based on the barometric pressure value and the air-volume value, the system control circuit turns on a warning-use LED so as to inform a user that a filter is clogged.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: May 5, 2009
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Hirotake Horiguchi, Takeshi Higashino, Ryosuke Sato
  • Publication number: 20090027214
    Abstract: The fuel filter monitor measures pressure upstream and downstream of a fuel filter or filter bank. A solid state differential pressure sensor senses the pressure difference across the filter or filter bank. The analog output of the pressure sensor is connected to an electronic gauge for continuous monitoring of the pressure differential to determine if the filter is reaching clogged condition. The analog output signal can be supplied to an analog to digital converter and the digital information supplied to a processor for pressure trending.
    Type: Application
    Filed: July 14, 2008
    Publication date: January 29, 2009
    Inventor: Robert M. Elwood
  • Publication number: 20080148597
    Abstract: A clogging detecting apparatus for a dryer is provided that can check a clogging state of an air passage according to an off time of a drying operation. The clogging detecting apparatus may include a heater for heating the air of the air passage, a temperature control unit for turning on/off a power supply from a power unit to the heater according to a temperature of the air passage or a temperature of the heater, and a judgment unit for judging the clogging state of the air passage according to an on/off time of the temperature control unit. The clogging detecting apparatus may precisely judge the clogging state of the air passage according to a quantity of laundry dried in the dryer regardless of external factors such as a variation of an external common power.
    Type: Application
    Filed: December 21, 2007
    Publication date: June 26, 2008
    Inventors: Yang-hwan KIM, Kyung-hun KIM, Ja-in KOO, Ju-hyun KIM, Sun-cheol BAE, Ju-young MIN, Jin-seok HU
  • Patent number: 7261762
    Abstract: A method and system for detecting and predicting air filter condition for an air handling system operates by determining a system resistance to air flow. The system resistance is utilized to determine a detection statistic indicative of current filter condition and to predict remaining life of the air filter. The system resistance is determined using models that approximate the expected operation of the air handling system. The approximation is then compared to actual values to obtain a difference. Once the difference between the approximated value exceeds a threshold value, an alarm is initiated that is indicative of system resistance. The remaining air filter life is then determined by using historically gathered data, or by using a known degradation rate of the air filter. Once the remaining life of the air filter is estimated, replacement can be scheduled that would coincide with other maintenance.
    Type: Grant
    Filed: May 6, 2004
    Date of Patent: August 28, 2007
    Assignee: Carrier Corporation
    Inventors: Pengju Kang, Mohsen Farzad, Slaven Stricevic, Payman Sadegh, Alan M. Finn
  • Patent number: 7253742
    Abstract: An apparatus for measuring at least one parameter associated with a fluid flowing within a pipe includes a spatial array of pressure sensors disposed at different axial locations x1. . . xN along the pipe. Each of the pressure sensors provides a pressure signal P(t) indicative of unsteady pressure within the pipe at a corresponding axial location of the pipe. A signal processor receives the pressure signals from each of the pressure sensors and determines the parameter of the fluid using pressure signals from selected ones of the pressure sensors. By selecting different pressure sensors, the signal processor can configure the array to meet different criteria. In one embodiment, the array of pressure sensors may be formed on a single sheet of polyvinylidene fluoride (PVDF) that is wrapped around at least a portion of an outer surface of the pipe. This arrangement allows a large number of pressure sensors to be quickly and economically installed.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: August 7, 2007
    Assignee: CiDRA Corporation
    Inventors: Michael A. Davis, Mark R. Fernald, Timothy J. Bailey
  • Patent number: 7182855
    Abstract: A fuel filter includes a first filter chamber, a second filter chamber and a valve assembly disposed between the first and second filter chambers. The valve assembly includes a valve casing with a valve head connected to a flag indicator slidably disposed within the valve casing and movable between a first and second position. A port located in the valve casing allows fuel to flow from the first filter chamber to the second filter chamber when the valve head and flag indicator moves from the first position to the second position. A transparent portion of the valve casing allows the flag indicator to be visible in the second position allowing a user to determine that the fuel filter must be serviced or removed and replaced.
    Type: Grant
    Filed: January 15, 2004
    Date of Patent: February 27, 2007
    Inventor: Patrick Owen O'Leary
  • Patent number: 7098779
    Abstract: Notification of an air intake restriction is provided for an internal combustion engine (101). Readings from one or more air pressure sensors (117, 119) utilized with an internal combustion engine (101) are processed to determine whether an air intake restriction is present. A notification is provided, for example, by displaying (209) a message on a display (123) in a driver's station of a vehicle housing the engine. Various data, including detection of an air intake restriction, may be transmitted (215) for use by personnel, for example, to provide maintenance.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: August 29, 2006
    Assignee: International Engine Intellectual Property Company, LLC
    Inventor: Stephen M. Pontius
  • Patent number: 7091868
    Abstract: A portable liquid level detector. The detector comprises a portable casing, a power supply unit disposed in the portable casing, a sensing device coupled to the power supply unit to sense a capacitance within a container and to output a enable signal when a difference in the capacitance is detected, a light emission device coupled to the sensing unit that illuminates after receiving the enable signal, and an alarm device coupled to the sensing unit that sounds after receiving the enable signal.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: August 15, 2006
    Assignee: Nanya Technology Corporation
    Inventors: Chin Chung Ku, Chih-Kun Chen, Chien-hui Lin
  • Patent number: 7084778
    Abstract: A sensor system for monitoring cryogenic gas flow through a tube/pipe has at least one sensor coupled to the tube/piping. An alarm circuit is coupled to the sensor for receiving measurement signals from the at least one sensor and for sending an alarm signal when the measurement signal deviates from a predetermined level.
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: August 1, 2006
    Inventor: Marcus Shoub
  • Patent number: 7075425
    Abstract: Disclosed are methods and apparatus for monitoring a plurality of grinder pumps, and in particular, remotely over a communications network. Aspects of the invention include an alarm panel having a modular configuration, a modem board which allows use of a single telephone line and use by the homeowner in an emergency, the transmission of data over a high voltage AC line, and recharging of a sensing tube for measuring the level of wastewater in a tank.
    Type: Grant
    Filed: October 12, 2001
    Date of Patent: July 11, 2006
    Assignee: Environment One Corporation
    Inventors: David Capano, Clark A. Henry, William J. Antalek, Elwood L. Morrell, Jr., John H. Koegler, Jr., Sharon G. Salvi
  • Patent number: 7030766
    Abstract: A device with a multi-function test feature for assessing or directing multiple sensor functions is provided for monitoring and interrogating air flow through Heating/Ventilation/Air-conditioning (HVAC)-type ducts for changes to ambient conditions such as smoke, heat, gas, and/or relative humidity.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: April 18, 2006
    Assignee: Edwards Systems Technology, Inc.
    Inventors: Robert Right, Hilario Costa, Jan Braam, Paul Schatz
  • Patent number: 7015820
    Abstract: The proper function of a smoke detector of an enclosed space, such as a toilet or freight space or crew quarters in an aircraft, is monitored by at least two air pressure sensors which are so positioned that these air pressure sensors can measure an air pressure differential in the air flow into the smoke detector. If a pressure differential is detected the differential is evaluated in a central processing unit which produces a respective signal that indicates that the air flow and thus the smoke flow into the smoke detector is obstructed, whereby the smoke detector cannot function properly. This signal is visibly or audibly indicated.
    Type: Grant
    Filed: May 3, 2004
    Date of Patent: March 21, 2006
    Assignee: Airbus Deutschland GmbH
    Inventor: Axel Bobenhausen
  • Patent number: 6993414
    Abstract: Static pressures are measured in an HVAC system and utilized to predict the condition of a filter in the HVAC system. As the filter becomes clogged, the static pressure can be expected to increase. Changes in the static pressure are determined periodically, and utilized to predict the condition of the filter. A display provides a user with an indication of the current condition of the filter, and a recommendation to replace the filter once it reaches a predetermined condition.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: January 31, 2006
    Assignee: Carrier Corporation
    Inventor: Rajendra K. Shah
  • Patent number: RE39871
    Abstract: A novel basic allergen/particulate data collection device and a novel multi-function personal air quality management device are disclosed. Both devices include sensor sub-assembly detecting and reporting on allergen/particulate data (preferably, for allergen/particulate with sizes smaller than 5 micron) for an indoor location (where the asthma patient is situated). Both devices are communication enabled to allow the allergen/particulate data to be provided to an air/asthma advice server, to generate air/asthma advice for an asthma patient, taking into consideration the allergen/particulate data as well as air quality data for a surrounding outdoor area of the indoor location. In one embodiment of the basic device, the communication interface is tailored for “harsh environment” local area networking.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: October 9, 2007
    Assignee: AirAdvice, Inc.
    Inventor: John N. Skardon