Abstract: A particulate matter detection device includes a collection electrode that collects the particulate matter, a discharge electrode that allows a corona discharge to occur when a voltage is applied between the collection electrode and the discharge electrode, a measurement electrode, the impedance between the collection electrode and the measurement electrode changing when the collection electrode has collected the particulate matter, and a measurement section that detects a change in the impedance between the collection electrode and the measurement electrode, the particulate matter detection device detecting the particulate matter by charging the particulate matter contained in the gas by utilizing the corona discharge, collecting the charged particulate matter by the collection electrode by utilizing an electrostatic force, and detecting a change in the impedance between the collection electrode that has collected the particulate matter and the measurement electrode using the measurement section.

Abstract: The disclosure relates to an air pollution sensor system incorporated in an enclosure, the enclosure including an air handling system inside an air duct, the air duct enabling a communication between air inside the enclosure and air outside the enclosure. The air duct including an air inlet for receiving air and an air outlet for releasing handled air inside the enclosure. The air pollution sensor system includes at least one ultra fine particle sensor capable of sensing particles with a diameter in a range of approximately 5-2500 nm, preferably in a range of approximately 5-1000 nm and more preferably in a range of approximately 5-500 nm inside the enclosure and providing a pollution information signal in response to the sensing of the particles. The disclosure further relates to various types of ultra fine particle sensors and air handling systems.

Abstract: The disclosure relates to a method or device for controlling the operation of an electrostatic precipitator, ESP. The ESP is used to remove dust particles from a process gas, which is generated by a combustion process. An indicator signal is generated, typically by means of a temperature sensor, which signal is indicative of the temperature of combustion air, which is fed to the combustion process. The ESP is operated in a manner depending on the indicator signal. Thereby back-corona effects may be avoided to a great extent.

Abstract: A particulate matter detecting apparatus (100) includes a detecting apparatus main body having a cavity (2) that is formed through the detecting apparatus main body, a particle charging section (3) that can charge particulate matter that has entered the cavity through an inflow-side end (6) of the cavity, a collection section (4) that can collect the particulate matter charged by the particle charging section (3) and measure the amount of the particulate matter, and an ion wind generation section (5) that allows the particulate matter charged by the particle charging section (3) to flow toward an outflow-side end (7) of the cavity, the particle charging section, the collection section (4), and the ion wind generation section (5) being provided inside the cavity in this order from the inflow-side end (6). The particulate matter detecting apparatus has a reduced size, shows only a small measurement error, and can be produced inexpensively.

Abstract: An air filter, an elevator having the same, and an air conditioning control method thereof purify the air inside the elevator to make the air safe and pleasant using a micro plasma ion generator (MPI). The elevator includes a cage which moves up and down in a vertical direction of a building and an air filter which purifies the air inside the cage. The air filter includes an ion generator which generates ions by a plasma discharge to discharge the ions into the cage, a dust sensor which detects a dust contamination level in the cage, and a controller which compares the dust contamination level detected by the dust sensor with a predetermined standard contamination level and operates the ion generator If the dust contamination level is equal to or greater than the predetermined standard contamination level.

Abstract: An onsite chemistry air filtration system to remove gaseous contaminants from air is disclosed. The onsite chemistry air filtration system of the present invention comprises: a conventional particulate filtration section, a photochemical filtration section, a static gas phase filtration section and a catalytic filtration section. The conventional particulate filtration section captures solids and condensables. In the photochemical filtration section, UV lamps generate bio-destruction and surface photochemical activity on a semiconductor catalyst material, provide a radiation source to irradiate airborne contaminant molecules and to energize their states to promote reactions and generate airborne ozone and radicals. In the static gas phase filtration section, gas phase filtration media is used to capture contaminants, concentrate them in a relatively confined space and allow airborne generated chemistries to concentrate and react in-situ, thereby creating a regeneration effect on the media.

Abstract: Provided is an air purifier, including: a body having an air inlet and an air outlet, a blower, an electric control box, an electrostatic absorption device and a carbon dioxide sensor. The air purifier effectively removes dust particles and bacteria in the air, measures and controls the carbon dioxide content in the air, displays the content of carbon dioxide to users and helps to protect human health.

Abstract: A particulate matter detection device (100) includes a first electrode (10) that includes a conductive section (12) and a dielectric (14) that covers the conductive section (12), and a second electrode (20) that is disposed opposite to the first electrode (10) at an interval of 0.3 to 3.0 mm. Charged particulate matter contained in a fluid that passes through the space between the first electrode (10) and the second electrode (20), or particulate matter that is contained in a fluid and charged by a discharge that occurs due to application of a voltage between the electrodes (10) and (20) is electrically adsorbed on at least one of the electrodes (10) and (20), and the particulate matter adsorbed on the electrodes (10) and (20) is detected by measuring a change in electrical properties of the first electrode (10), or a change in electrical properties of the electrodes (10) and (20).

Abstract: An air purifier includes a main frame, a discharging device, a dust collection device and a voltage generator. The discharging device has a discharging portion and is installed in the main frame. The dust collection device has a dust collection portion and is installed in one side of the discharging device. The air purifier can produce ozone, negative ions and static electricity by moving the discharging portion and the dust collection portion and receiving suitable voltage. The voltage generator, the discharging portion, and the dust collection portion accomplish conduction. Production of ozone, negative ions and static electricity occurs according to separation between the discharging portion and dust collection portion, as well as the particular environment of operation, thereby improving air quality.

Abstract: A PM sensor is provided having high responsiveness and capable of long term detection. A PM sensor 11 includes a sensor element 12 that has particulate collection electrodes 123A, 128A to which a particulate collection voltage for causing particulate matter contained in exhaust to adhere to a sensor element 12 is applied, and measurement electrodes 127A, 127B to which a measurement voltage for measuring an electrical characteristic of the sensor element 12 is applied, in which, after a particulate collection voltage is applied to the particulate collection electrodes 123A, 128A, application of the particulate collection voltage is stopped in response to a predetermined condition being satisfied, the measurement voltage is applied to the measurement electrodes 127A, 127B, and the electrical characteristic of the sensor element 12 is measured.

Abstract: A non-discharge type air purification apparatus for industry is disclosed, which is able to effectively remove a smell substance and pollutant contained in an exhaust gas by supplying an enough amount of anion with the help of a multi-step anion generation unit without a high voltage discharge.

Abstract: An air filter, which is intended for installation in an air conditioning system of a vehicle and which exhibits a moisture sensor, is disposed on and/or at the air filter. The moisture sensor is a component of an electric circuit section, which is arranged on and/or at the air filter. The moisture sensor is a capacitive sensor, whose capacitance depends on the moisture loading of the air, flowing around the sensor. At least one electric property of the electric circuit section represents the type of air filter.

Abstract: A system is provided that prevents inhibition of adsorption of Hg and other heavy metals by activated carbon or other heavy metal adsorbent due to prior adsorption of sulfur trioxide (SO3) in an exhaust gas containing SO3. As it has been found that while SO3 is adsorbed, the adsorption of SO3 precedes the adsorption of Hg and other heavy metals onto activated carbon, a basic substance injection system is disposed along an exhaust gas flow channel at an upstream side of an activated carbon injection system, thereby attaining effective removal of Hg and other heavy metals from the exhaust gas by adsorption thereof onto surface pores of the activated carbon. The SO3 concentration after removal by basic substance conversion is computed from the SO3 concentration before removal, and the activated carbon injection rate can be controlled based on the concentration after removal.

Abstract: The following devices are successively disposed in the following order from an upstream side to a downstream side in an exhaust gas duct of a combustion apparatus: an air preheater, preheating combustion air for use in an exhaust gas treating apparatus; a heat recovery unit, recovering exhaust gas heat at an exit of the air preheater; a precipitator, collecting soot/dust contained in an exhaust gas at an exit of the heat recovery unit; a wet flue gas desulfurizer, removing sulfur oxides contained in the exhaust gas at the exit of the precipitator; and a reheater, heating the exhaust gas at the exit of the wet flue gas desulfurizer. Each of the heat recovery unit and the reheater has a heat exchanger tube, and a circulation line is disposed to connect the heat exchanger tubes. A sulfur trioxide (SO3) removing agent is supplied to the upstream side of the heat recovery unit, and the temperature of the exhaust gas at the exit of the heat recovery unit is adjusted to not more than a dew point of sulfur trioxide.

Abstract: In a method of treating a gas exhausted from a process chamber, the exhaust gas is conveyed to a vacuum pump (20) and a nitrogen purge gas is added to the exhaust gas for pumping with the exhaust gas. Gas exhaust from the pump is conveyed to an abatement device (28) for abating the exhaust gas. The amount of purge gas added to the exhaust gas is adjusted in response to a variation of the composition of the exhaust gas, or the composition of the gas supplied to the process chamber, to optimise the abatement of the exhaust gas.

Abstract: A method for reducing biological contamination of indoor air, which method includes providing a concentrated salt solution, which is either (i) a brine capable of responding to aeration thereof by a rapid increase of its Redox potential, wherein the rate of said increase is greater than the rate of increase observed for a 45% (w/w) calcium chloride solution subjected to identical aeration conditions; or (ii) a brine which is passed through an electrolytic cell in order to raise its Redox potential; circulating said concentrated salt solution through a treatment zone; causing a stream of biologically contaminated air to flow through said treatment zone, such that said contaminated air is contacted with said salt solution in said treatment zone; and withdrawing purified air from said treatment zone.

Abstract: An onsite chemistry air filtration system to remove gaseous contaminants from air is disclosed. The onsite chemistry air filtration system of the present invention comprises: a conventional particulate filtration section, a photochemical filtration section, a static gas phase filtration section and a catalytic filtration section. The conventional particulate filtration section captures solids and condensables. In the photochemical filtration section, UV lamps generate bio-destruction and surface photochemical activity on a semiconductor catalyst material, provide a radiation source to irradiate airborne contaminant molecules and to energize their states to promote reactions and generate airborne ozone and radicals. In the static gas phase filtration section, gas phase filtration media is used to capture contaminants, concentrate them in a relatively confined space and allow airborne generated chemistries to concentrate and react in-situ, thereby creating a regeneration effect on the media.

Abstract: A particulate matter detection device includes a collection electrode that collects the particulate matter, a discharge electrode that allows a corona discharge to occur when a voltage is applied between the collection electrode and the discharge electrode, a measurement electrode, the impedance between the collection electrode and the measurement electrode changing when the collection electrode has collected the particulate matter, and a measurement section that detects a change in the impedance between the collection electrode and the measurement electrode, the particulate matter detection device detecting the particulate matter by charging the particulate matter contained in the gas by utilizing the corona discharge, collecting the charged particulate matter by the collection electrode by utilizing an electrostatic force, and detecting a change in the impedance between the collection electrode that has collected the particulate matter and the measurement electrode using the measurement section.

Abstract: A particulate matter detecting apparatus (100) includes a detecting apparatus main body having a cavity (2) that is formed through the detecting apparatus main body, a particle charging section (3) that can charge particulate matter that has entered the cavity through an inflow-side end (6) of the cavity, a collection section (4) that can collect the particulate matter charged by the particle charging section (3) and measure the amount of the particulate matter, and an ion wind generation section (5) that allows the particulate matter charged by the particle charging section (3) to flow toward an outflow-side end (7) of the cavity, the particle charging section, the collection section (4), and the ion wind generation section (5) being provided inside the cavity in this order from the inflow-side end (6). The particulate matter detecting apparatus has a reduced size, shows only a small measurement error, and can be produced inexpensively.

Abstract: A control device repeats first air volume control and second air volume control for a predetermined number of times irrespective of a control state at that time while forcedly driving an ion generator, when a bacteria elimination shower switch is turned on. In the first air volume control, a sirocco fan generates an air flow having a predetermined air volume. In the second air volume control, the sirocco fan generates an air flow having an air volume smaller than the predetermined air volume. Therefore, a bacteria elimination effect is enhanced in an air conditioning apparatus.

Abstract: An electric power supply of a discharge device which generates a streamer discharge is provided with a discharge control part. By virtue of the discharge control part, the discharge electric power of the discharge device is increased or decreased depending on the treatment amount of a component to be treated in an air purification device.

Abstract: A system for decontaminating a gas is provided. The system includes: a passageway containing at least one set of two or three electrodes. If the set contains three electrodes, it has two outer electrodes electrically connected together and one inner electrode.

Abstract: The air clarifying apparatus includes a negative ion generator and an indoor air circulator. It further includes an ozone generator having a capability of maintaining the average concentration value of ozone in an indoor atmosphere at 0.02 to 0.05 ppm, while the average concentration value of negative ions in the vicinity of the blowout port of the negative ion generator is maintained at 200,000 to 1,000,000 pieces/cc. With this configuration, the negative ions coexist with ozone having a low concentration.

Abstract: An air filter, an elevator having the same, and an air conditioning control method thereof purify the air inside the elevator to make the air safe and pleasant using a micro plasma ion generator (MPI). The elevator includes a cage which moves up and down in a vertical direction of a building and an air filter which purifies the air inside the cage. The air filter includes an ion generator which generates ions by a plasma discharge to discharge the ions into the cage, a dust sensor which detects a dust contamination level in the cage, and a controller which compares the dust contamination level detected by the dust sensor with a predetermined standard contamination level and operates the ion generator If the dust contamination level is equal to or greater than the predetermined standard contamination level.

Abstract: Method for supplying a high purity gas product comprising providing a first gas stream including a major component and at least one impurity component, determining the concentration of the at least one impurity component, and comparing the concentration so determined with a reference concentration for that component. When the value of the concentration so determined is less than or equal to the reference concentration, the first gas stream is utilized to provide the high purity gas product. When the value of the concentration so determined is greater than the reference concentration, a second gas stream comprising the major component is provided and the first and second gas streams are mixed to yield a mixed gas stream having a concentration of the at least one impurity component that is less than the reference concentration.

Abstract: The present invention relates to a system for effectively filtering particulate matter from exhaust gas. Exemplary embodiments of the invention provides a system for capturing diesel-powered vehicle particulate matter in exhaust gas, the system including: a detour channel at the interior of the entrance to the diesel particulate filter, an electrode located in front of the detour channel and operable to ionize the particulate matter, and a control unit operable to control operation of the electrode.

Abstract: An air cleaner is provided that includes one or more ionizing panels having at least one ionizing wire in connection with a voltage source. One or more collector cells separate from the one or more ionizing wire panels are releasably received within the air cleaner housing to establish an electrical connection between the collector cell and the voltage source for applying a voltage potential between the collector cell and the ionizing wire. The collector cell may be removed from the air cleaner to permit cleaning of the collector cell separate from the ionizing panels. The air cleaner monitors at least one variable indicative of the operation of the air cleaner. Upon determining that the variable has reached a predetermined level indicative of a significant amount of dust accumulation, a controller activates a light source to illuminate indicia on a display screen which indicates a need for servicing the air cleaner.

Abstract: An air purifier includes an outer case having an air purifying cavity, an ionizer module, and an ozone reduction module. The ionizer module includes a power unit and an ionizing electrode. The ozone reduction module is electrically connected to the power unit for generating heat within the air purifying cavity, wherein when a temperature within the air purifying cavity reaches a preset temperature, a level of ozone generated by the ionizing electrode unit is substantially minimized and controlled for preventing excess generation of ozone.

Abstract: The method for salon air purifying comprises the following steps: (a) categorizing contaminants generated in the salon; (b) selecting air purifiers such that each air purifier is most effective in capturing a specific category of contaminants; (c) detecting which category of contaminants is being generated; (d) activating the air purifier that would most effectively capture the specific contaminants being generated and deactivate other air purifier(s) if not needed. Applying the aforementioned method, the apparatus for salon air purification comprises: (a) detectors to detect which category of contaminants are being generated, (b) two different air purifiers: one for capturing chemical fumes and the other for capturing filing dust and (c) a controller to receive the detectors' data, to activate air purifier only when airborne contaminants are present and to select which air purifier to activate based on the detectors' data.

Abstract: A system and method for ionization detection in electrically enhanced air filtration systems is described. One embodiment includes a system for electrically enhanced air filtration, the system comprising an electrically enhanced filter comprising a filter and an ionizing electrode disposed on an upstream side of the filter; a control device connected to the electrically enhanced filter, wherein the control device can control the electrically enhanced filter; and an ionization detector, wherein the ionization detector is adjacent to the electrically enhanced filter and wherein the ionization detector is connected to the control device.

Abstract: An arrangement for treating room air has a first air quality sensor in an external air conduit of an air conditioning device. An ionization apparatus, an ozone sensor, an air humidity sensor, an airflow sensor, and at least one air temperature adjusting device are arranged in the supply conduit between air conditioning device and room. Chamber or hood devices forming a component of the room are coupled to the supply conduit. A side of the chamber or hood devices has openings ensuring convection of the supply air into the room. A recirculating air conduit branches off an exhaust conduit to the air-conditioning device. A second air quality sensor is arranged in the recirculating air conduit. A control device is connected to first air quality sensor, ozone sensor, air humidity sensor, airflow sensor, second air quality sensor, and the air temperature adjusting device.

Abstract: The invention concerns a device for purifying a gas stream containing condensable vapours. The device comprises a shell (b 7) defining a sealed volume, a cooler for quenching the gas stream, a rotating assembly (42) including a rotor (44) and a cylindrical separating and filtering ferrule (54) consisting of two circular slotted bands (56) mounted on the rotor and rotating therewith; a supporting tube (48) mounted on the rotor (44) and bearing a swirling-scraper device (50), a cylindrical electrode (94) surrounding the separating and filtering ferrule (54) and a central counter-electrode (94) for creating an electrostatic field in the shell (7), an outlet duct for the purified gas, an outlet duct for the condensates (40). Impact and separation plates (64) are fixed on the bands of the collet. Device for purification of a gas flow containing condensable vapours.

Abstract: An intense field dielectric air filtration system associated with an air conditioning unit includes a microprocessor based control system which may be connected to the thermostat of the air conditioning unit to energize the air filtration system in response to a call for heat or cooling signal at the thermostat or startup of the fan motor for the air conditioning unit. The control system includes a power supply for the air filtration system together with voltage and current monitoring circuits for detecting a fault condition. Filtration system on/off and timing function reset switches are connected to the microprocessor and visual displays, including a multicolored LED bargraph display, are controlled by the microprocessor to indicate voltage potential applied to the air filtration system, a fault condition or a test mode.

Abstract: An air filtering apparatus for electrolyzing water in an electrolytic bath by applying a voltage between electrodes in the electrolytic bath, supplying the generated electrolytic water to a gas-liquid contact member and blowing air to the gas-liquid contact member to filter the air, including a scale removing unit for inverting the polarities of the electrodes to remove scale deposited on the electrodes, and a judging unit for judging on the basis of a current value flowing between the electrodes whether the scale is removed from the surface of the electrode.

Abstract: The present invention relates to a system for effectively filtering particulate matter from exhaust gas. Exemplary embodiments of the invention provides a system for capturing diesel-powered vehicle particulate matter in exhaust gas, the system including: a detour channel at the interior of the entrance to the diesel particulate filter, an electrode located in front of the detour channel and operable to ionize the particulate matter, and a control unit operable to control operation of the electrode.

Abstract: A volatile organic compound treatment apparatus including an adsorber coming into contact with a gas to be treated and adsorbing volatile organic compounds; a plurality of pairs of electrodes, divided into a plurality of groups, which generate electric discharge so that a part of the adsorber is exposed to the electric discharge; and an electric discharge control mechanism for controlling whether or not the electric discharge is generated in what pair of the electrodes by applying a voltage to every group of the pair of electrodes such that different parts of the adsorber are sequentially exposed to the electric discharge.

Abstract: An indoor air quality system for a structure is provided. The indoor air quality system includes a ventilation system and a corona discharge apparatus. The ventilation system directs air through the structure. The corona discharge apparatus is positioned within the ventilation system and is operable to filter the air and to move the air through the ventilation system.

Abstract: Disclosed is an apparatus and method for controlling an air cleaning. The apparatus includes an air cleaning element, an AC high-voltage generator and a control unit. The air cleaning element generates negative ions and ozone using plasma discharge, and cleans indoor air using the negative ions and ozone. The AC high-voltage generator generates an AC high-voltage, and applies the AC high-voltage to the air cleaning element. The control unit varies at least one of the AC voltage and AC frequency applied to the air cleaning element by the AC high-voltage generator depending on a state of indoor air being cleaned using the air cleaning element. Therefore, it is possible to effectively generate negative ions while minimizing ozone generation to an acceptable level depending on a state of indoor air, thereby increasing air cleaning performance so as to sterilize and clean contaminants more efficiently.

Abstract: The invention relates to a method for the separation of molecules having different excitation spectra, which form components of a gas. The molecules are excited by laser pulses in a way that the molecules to be separated are transferred into a state of excitation due to multi-absorption of energy quanta from laser pulses, and in which they are extracted from the gas so that they exist in a composition determined by the form of the laser pulses. According to the invention, the laser pulses are formed by an iterative process in which each laser pulse varies in its form depending on the extracted molecules' composition after their absorption of energy quanta.

Abstract: An electrostatic precipitator having a plurality of electrostatic precipitation units positioned within the electrostatic precipitator. Each of the electrostatic precipitation units includes a plurality of negative wire electrodes and a plurality of positive electrode plates. The electrostatic precipitation units are arranged such that spacing between the negative wire electrodes of a first electrostatic precipitation unit is a first distance apart, and spacing between the negative wire electrodes of additional electrostatic precipitation units is less than the spacing between the negative wire electrodes of the first electrostatic precipitation unit. Moreover, a variable voltage is applied to the each of the electrostatic precipitation units between the positive electrode plates and the negative wire electrodes so as to cause particles in the exhaust gas to adhere to the positive electrode plates.

Abstract: A battery (16) drives an electric motor (17) which in turn drives a fan (18). A circuit board (20) controls the operation of the motor and fan to maintain the flow rate. Air is drawn through an inlet (22) and out through a vent (24). Foam discs (32) and (34) may extract particles from the air and an electrostatic filter may attract aerosols in the air.

Abstract: An apparatus analyzes components of particulate materials suspended in air. The apparatus includes a container into which the air is introduced, a discharging electrode arranged in the container to electrically charge the particulate materials contained in the air, a dust collecting electrode arranged in the container to collect charged particulate materials utilizing electric potential difference, and a device for separating volatile components contained in the particulate materials collected on the dust collecting electrode. A gas analyzer is connected to the container into which the volatile components of the particulate materials separated in the container are introduced, to analyze the volatile components.

Abstract: A ceiling fan that incorporates into its blades both a system for air purification by removing dust and other particulate pollutants from the air in a room through ionization of the air stream passing over an ionizer grid and also a system for heating and cooling the air stream passing over the blades. The device provides a room conditioner for efficiently heating or cooling and maintaining a room at a temperature comfortable to the user. The device also provides negative ion generation through the use of the ionizer.

Abstract: An apparatus for separating and converting exhaust particulates from a stream of exhaust gas, especially a diesel engine, into gaseous substances, in which the exhaust gas is guided through a honeycomb filter (6) made from a porous ceramic material whose axially extending channels (1, 2) are open merely at one face side of the filter and are closed off at the respective other face side, and a voltage is applied to electrodes (3, 4) extending parallel to the channels (1, 2) of the honeycomb filter (6). The closure of the channels (1, 2) at the face side is made in such a way that the channels (1, 2) each extending at the same normal distance from one of the electrodes (3, 4) are either all open or all closed off at their face side (9). The channels (1, 2) are mutually offset in a brickwork-like way.

Abstract: An example airborne conductive contaminant handling system is described. The airborne conductive contaminant handling system may include a handling circuit that is configured to selectively pass an electric current through a conductive contaminant. The airborne conductive contaminant handling system may also include an attracting circuit that is configured to attract an airborne conductive contaminant towards the handling circuit, where it can be subjected to the electric current.

Abstract: An air purifier discharges air directly to a room without forcing the air to pass through a HEPA filter when the level of contaminations in the air, such as dust particles, is determined to be sufficiently low. The air purifier thus minimizes air pressure loss and attenuates operational noise caused by the HEPA filter, through which air passes. In an aspect, the air purifier includes a main body defining an air passage therein to allow sucked air to pass therethrough prior to being discharged, and a first filter installed in the main body to be switched between a dosed state and an open state. The first filter removes contaminants from the sucked air in the dosed state, and allows the sucked air to pass smoothly through the air passage in the open state.

Abstract: A housing for purifying an air flow moving through it provides a reception space for receiving the air flow. The air is treated with mechanical filtration of particles larger than approximately 2 micron, ionizing with energetic ions, exposure to ultraviolet light radiation, and electrostatic precipitation of particles in the air inflow. The ionizing and UV bombardment of the air inflow occur simultaneously.

Abstract: The invention relates to a device for producing active oxygen ions in the air for improved air quality, comprising at least one air ionizer and an electric transformer producing sufficient electrical high voltage for air ionization. The air ionizer is coupled to a sensor which detects the oxidizable gas content in the air (air pollution sensor). On the basis of the detected content of such oxidizable gases, the electrical energy which is guided to the air ionizer is transformed by an electrical control device in such a way that only low-level ionization occurs at low concentration of oxidizable gases. Said ionization is sensor-controlled and can automatically be increased to a maximum value when the concentration of oxidizable gases rises.

Abstract: A hand-holdable electro-kinetic electro-static ionic air refreshener-conditioner for a pet shelter or litter box includes a self-contained ion generator that provides electro-kinetically moved air with ions and safe amounts of ozone. The ion generator includes a high voltage pulse generator whose output pulses are coupled between first and second electrode arrays. Preferably the first array comprises one or more pin-like electrodes and the second array comprises one more washer-like electrodes. Preferably a ratio between effective area of an electrode in the second array compared to effective area of an electrode in the first array exceeds about 15:1 and preferably is about 20:1. An electric field produced by the high voltage pulses between the arrays produces an electrostatic flow of ionized air containing safe amounts of ozone. Optionally, a sensor detects odor adjacent the refreshener-conditioner causes the ion generator to be activated when sensed odor exceeds a predetermined threshold.

Abstract: A hand-holdable electro-kinetic electro-static ionic air refreshener-conditioner for a pet shelter or litter box includes a self-contained ion generator that provides electro-kinetically moved air with ions and safe amounts of ozone. The ion generator includes a high voltage pulse generator whose output pulses are coupled between first and second electrode arrays. Preferably the first array comprises one or more pin-like electrodes and the second array comprises one or more washer-like electrodes. Preferably a ratio between effective area of an electrode in the second array compared to effective area of an electrode in the first array exceeds about 15:1 and preferably is about 20:1. An electric field produced by the high voltage pulses between the arrays produces an electrostatic flow of ionized air containing safe amounts of ozone. Optionally, a sensor detectors odor adjacent the refreshener-conditioner causes the ion generator to be activated when sensed odor exceeds a predetermined threshold.