EP4408587A1 - Raumluftreiniger mit ozonkatalysator - Google Patents
Raumluftreiniger mit ozonkatalysatorInfo
- Publication number
- EP4408587A1 EP4408587A1 EP22793153.2A EP22793153A EP4408587A1 EP 4408587 A1 EP4408587 A1 EP 4408587A1 EP 22793153 A EP22793153 A EP 22793153A EP 4408587 A1 EP4408587 A1 EP 4408587A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- room air
- air cleaner
- ozone
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/019—Post-treatment of gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8671—Removing components of defined structure not provided for in B01D53/8603 - B01D53/8668
- B01D53/8675—Ozone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/16—Plant or installations having external electricity supply wet type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/32—Transportable units, e.g. for cleaning room air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/36—Controlling flow of gases or vapour
- B03C3/361—Controlling flow of gases or vapour by static mechanical means, e.g. deflector
- B03C3/365—Controlling flow of gases or vapour by static mechanical means, e.g. deflector located after the filter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1021—Platinum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1023—Palladium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/106—Gold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/2073—Manganese
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/10—Single element gases other than halogens
- B01D2257/106—Ozone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/36—Controlling flow of gases or vapour
- B03C3/368—Controlling flow of gases or vapour by other than static mechanical means, e.g. internal ventilator or recycler
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/41—Ionising-electrodes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/45—Collecting-electrodes
Definitions
- the present invention relates to a device, namely a room air cleaner, and a method for treating, in particular humidifying, cleaning and/or washing air, such as an air humidifier, an air cleaner, an air washer or the like.
- Generic room air cleaners also known as air treatment devices, are used to prepare, in particular to clean, humidify and/or wash air that is present in closed rooms and/or buildings.
- the air treatment devices can have numerous areas of application, for example in medical technology or in the health industry, especially in doctor's offices, isolation rooms, sick rooms, intensive care units or clean rooms, in private households, especially in bedrooms, living rooms, kitchens or children's rooms, in public or industrial buildings such as museums, theaters , government buildings or offices, and/or in mobility, for example for cleaning vehicle interiors, especially in taxis, rental cars or vehicle sharing concepts.
- the air treatment devices are standing devices and/or small electrical devices that can be placed in buildings or rooms on the floor or on shelves such as tables.
- room air cleaners are equipped with multi-layer filter systems.
- a highly effective particle filter is supplemented by additional filters so that the intake air is cleaned and freed from pollutants.
- Air washers usually work without additional filters and lead the air through a water bath, where it is cleaned and humidified at the same time.
- Increasingly high demands are being placed on air treatment. On the one hand, this has to do with tightening legal requirements and the steadily growing health awareness of the population.
- the fine dust present in the air which has solid particles in the pg/m 3 range, has proven to be particularly critical.
- Particulate matter can also contain bacteria, pollen, viruses, spores, fibers or the like.
- ozone can be formed intentionally or unintentionally. For this reason, air conditioning systems generally do not generate ozone.
- the German Lung Foundation warns against eliminating the bad smell of smoky rooms with ozone-generating air purifiers.
- the guideline VDI 6022 sheet 5 "Air conditioning, indoor air quality - avoidance of allergenic loads - requirements for the testing and evaluation of technical devices and components with an influence on the breathing air” therefore recommends determining the ozone emission rate when using ionizers.
- ozone depletion systems are known. These can, for example, be of a thermal nature, for example by applying heat of at least 50 to 60 °C, which represents an additional energy requirement, based on the use of activated carbon, which has the disadvantage that activated carbon filters have a limited lifespan because they decompose and are renewed must be, or act catalytically.
- a plasma-based air cleaner with a catalytic ozone decomposition system is described in EP 2774628 Ai, according to which generated ozone can be broken down via a downstream filter with a catalyst coating.
- a room air cleaner for cleaning, humidifying and/or washing air.
- the air can, for example, be provided with solid and/or liquid particles, in particular impurities, which can be at least partially separated from the air by means of the room air cleaner according to the invention.
- the air is in particular air that is present in closed rooms and/or buildings, such as room air, and with which people are in direct contact can guess.
- the room air cleaner is a small electrical device and/or a stand-alone device that can be set up or removed in buildings or rooms or that can be integrated into a room and/or building ventilation system, such as a vehicle interior ventilation system.
- the room air cleaner can be designed as an independent device, in particular a stand-alone device, it is also possible to integrate the room air cleaner according to the invention in ventilation systems, extractor hoods or other ventilation systems arranged in a room in a building or in a room in a vehicle.
- the room air purifier may be able to remove liquid particles, such as fat or oil particles, as well as fine dust and solid particles from the air, even for solid particle concentrations in the pg/m 3 range.
- the room air cleaner is able to comply with the fine dust limit values, with a fine dust limit value PMio of 40 pg/m 3 being achievable, for example.
- Fine dust particles are understood to mean particles with an aerodynamic diameter of 10 ⁇ m or smaller.
- a room air cleaner according to the invention comprises an electrostatic precipitator with a counter electrode and an emission electrode for separating the liquid and/or solid particles from the air to be treated.
- the emission electrode can be formed, for example, as an array of emission electrodes.
- the emission electrodes can be designed as emission electrode needles.
- the electrostatic precipitator is used to separate solid and/or liquid particles from the air to be cleaned while generating ozone and, in particular, to eliminate unpleasant odors.
- the electrostatic precipitator can be designed as a plasma precipitator.
- the counter electrode and the emission electrode can be insulated from each other and/or can each be made in one piece.
- the emission electrode also known as the discharge electrode, is mainly used to emit negatively charged particles in particular.
- the counter electrode also known as the collecting electrode, forms the opposite pole.
- the space between the emission electrode and the counter-electrode can be referred to as the separation space, in which the solid and/or liquid particles are separated from the air to be treated.
- the high voltage is in the range from 8 to 16 kV, in particular in the range from 11 to 14 kV.
- the electrostatic precipitator is operated below the breakdown or flashover voltage.
- the breakdown voltage also known as the breakdown voltage, is the voltage that must be exceeded in order for a voltage breakdown to occur through a material or substance, for example an insulator or gas.
- the principle of charge generation on which the electrostatic precipitator is based can be impact ionization. When the so-called corona onset field strength is exceeded, electrons exit the emission electrode and interact with the surrounding air molecules, resulting in the formation of a so-called negative corona.
- Free electrons present in the air are strongly accelerated in the electrostatic field of the corona, so that a gas discharge can occur.
- the free electrons hit air molecules, further electrons can be split off or attached to the air molecules.
- the negative charges then move towards the neutrally charged counter-electrode.
- the counter-electrode can, for example, be grounded and/or at ground potential.
- the negatively charged charges accumulate on the particles. Due to the acting electrostatic force of the DC voltage field, which can be oriented transversely to the flow direction of the air through the room air cleaner, the negatively charged particles migrate in the direction of the counter-electrode, where they can release their charge and can be removed from the counter-electrode.
- the present invention also covers embodiments in which a positive corona or positively charged charge is generated instead of the negative corona or negatively charged charges. To avoid repetition, the description of the invention is limited to the implementation of the negative charge situation.
- the room air cleaner can have an air conveying device, in particular an air intake device such as a fan.
- a fan is generally understood to be a turbomachine that builds up a pressure ratio of between 1 and 1.3 between the suction and pressure sides in order to convey air.
- the air conveying device can be set up to suck in air from the environment and/or to convey air in the direction of the electrostatic precipitator.
- the Air conveying device capable or intended to suck the air to be treated, in particular building and/or room air, into the room air cleaner and to feed it to the electrostatic precipitator or to expose it to it in order to subject the air to be treated to an electrostatic precipitator process, solid and/or liquid particles separated from the air to be treated and so to clean the air to be treated.
- the air conveying device can be designed in such a way that the sucked-in air reaches speeds in the range from 2 m/s to 10 m/s. After passing through the electrostatic precipitator, the electrically charged air can flow through the room air cleaner at flow speeds in the range from 0.1 m/s to 0.5 m/s, in particular it can be transported.
- the electrostatic precipitator can generate a stable DC voltage plasma with an electrical high-voltage field of the electrostatic precipitator in the range from 8 kV to 16 kV.
- the plasma current at the emission electrodes can be between 4 p ⁇ and 10 p ⁇ .
- At least part of the oxygen (0 2 ) contained in the air to be cleaned is split into individual oxygen atoms by the negative charges generated in the electrostatic precipitator, which can then combine to form ozone (O 3 ).
- O 3 ozone
- the air to be treated can be freed from unpleasant odors and/or disinfected by the ozone.
- the room air cleaner according to the invention comprises a catalyst downstream of the electrostatic precipitator in the air flow direction.
- the catalyst arranged according to the invention does not impair the electrostatic precipitator, in particular the ionization process of the air, so that the degree of separation is increased compared to the prior art, while at the same time the spread of harmful ozone into the environment is avoided .
- the catalytic converter is not directly downstream of the electrostatic precipitator, ie at a small distance therefrom, but quite a significant distance behind it, so that it is reliably ruled out that the electrostatic precipitator process will be impaired.
- the catalyst kicks in catalytic process or a catalytic reaction, the ozone concentration in the treated air down and thus reduces the health risk of the room air cleaner according to the invention.
- the ozone generated is split by the catalytic effect of the catalyst, resulting in oxygen molecules that are harmless to health.
- a room air cleaner that is particularly easy to produce with a reduced health risk and an improved degree of separation is provided, which is characterized in particular by a space-saving, flexible and/or cost-effective property.
- the room air cleaner comprises an air duct, in particular in the form of a rotation, which is set up to guide the air to be treated and enriched with ozone from the electrostatic precipitator to the catalytic converter.
- the air duct is designed in such a way that the air is deflected by at least 10°, 30°, 45 ° , 60° or by approximately 90° on the way to the catalytic converter.
- the air duct has a deflection body which is arranged in particular in the center of rotation of the air duct and which is designed to deflect the air treated by the electrostatic precipitator against the direction of gravity.
- the air can flow evenly into the room air cleaner on all sides of the latter and be guided and/or supplied in a targeted manner to the electrostatic precipitator in order to clean the air.
- the cleaned air is then conveyed further, in particular in the direction of the center of rotation, by means of the air duct, deflected at the deflection body and fed out of the room air cleaner again counter to the direction of gravity, i.e. upwards.
- the inventors have found that the air on the side of the room air cleaner contains a particularly large number of particles, in other words it is particularly heavily polluted, so that particularly heavily polluted air flows into the room air cleaner through a lateral air inlet and a particularly large number of particles can be separated from the air.
- the deflection body is shaped in such a way that the treated air is deflected essentially in the direction of the axis of rotation defined by its center, in particular the center of rotation of the air duct.
- the deflection body is designed in a rotational manner. Provision can be made for the deflection body to have the shape of a gyroscope.
- the deflection body has a deflection surface that is particularly circumferential and at least partially concave, on which the cleaned air is deflected counter to the direction of gravity, ie upwards.
- the cleaned air can be deflected particularly evenly and reliably by means of a rotating deflection body.
- the deflection body can be curved at least in sections, in particular curved in such a way, preferably curved in a concave manner, that the air flows laminarly against it, so that turbulence, such as turbulence, for example, can be prevented.
- the catalyst has a net-shaped support which can have a particularly fine-meshed honeycomb structure or honeycomb shape and/or is provided with a catalytically active coating, such as a precious metal or manganese dioxide coating. Platinum, gold or palladium, for example, have proven particularly effective as precious metals.
- the catalytically active coating or substance can be designed to bring about a significant reduction in the ozone content in the air even at normal ambient temperature and/or single-layer, reticular carriers.
- the net-shaped support is a fine-meshed expanded metal or an electrically conductive plastic net which is coated with metal, for example.
- the coating is applied to the carrier by means of a gas or solution-based deposition process.
- a gas or solution-based deposition process for example, wet chemical deposition, chemical vapor deposition (CVD) or physical vapor deposition (PVD) can be used.
- CVD chemical vapor deposition
- PVD physical vapor deposition
- the coating can be dusted on.
- the room air cleaner comprises a discharge system, which is connected downstream of the electrostatic precipitator and upstream of the catalytic converter in the air flow direction, for neutralizing the ions generated during the electro-precipitation.
- the unloading system and the catalytic converter can, for example, be preassembled as a unit, in particular to form an air aftertreatment device.
- the discharge system serves to neutralize the electrostatically charged air ions before they are released into the environment in order to reduce the potentially negative health impact of the ozone generated during electrodeposition.
- the unloading system can also be equipped in such a way that the air is calmed by means of the unloading system, for example to reduce flow turbulence and/or to align the air flow so that the air can arrive in the catalyst in a directed, uniform and/or calmed manner, which improves the catalytic effect of the Catalyst increased.
- the discharge system is electrically conductive and/or ozone-resistant. Due to the ozone resistance, the service life of the discharge system and/or the ozone catalyst can be increased.
- the discharge system has an in particular multi-layer mesh or fabric, such as a wire mesh or a wire grid, a metallic mesh fabric or a non-metallic, electrically conductive plastic mesh fabric.
- the plastic netting can be coated with metal.
- the discharge system consists of the mesh or fabric, etc. Due to this form of the unloading system, its surface can be maximized in a minimum of space, which means that its effectiveness can be maximized.
- several layers have proven to be advantageous, in particular at least two, three, four, five, six or seven layers.
- Multi-layer means, in particular, that the layers are arranged one behind the other, viewed in the direction of flow, for example in the sense of a series connection.
- the discharge system is designed with such a fine mesh that an unhindered penetration of liquid and/or solid particles and/or air ions is prevented. This ensures that every particle and/or air ion touches the electrically conductive surface of the discharge system at least once in order to be able to be neutralized.
- the discharge system is designed to discharge ions by impact neutralize. The discharge system can be designed in such a way that the neutralizing effect unfolds when the ionized liquid and/or solid particles or air ions come into contact.
- the unloading system is designed with a fine mesh such that there is a ratio of free passage area to material, in particular mesh, of the unloading system of 5:1 to 10:1.
- the ratio has proven to be particularly advantageous, especially with regard to the compromise between high effectiveness, which would be favored by a small passage area, and the lowest possible pressure loss, which would be favored with the largest possible passage area/volume.
- the discharge system can have a metal foam, in particular made of nickel and/or copper, or a non-metallic, electrically conductive foam, in particular foam coated with metal.
- the foam is open-pored. This ensures that the air can flow through as effectively as possible.
- the foam can be a nickel-coated copper foam.
- the counter-electrode is wetted with liquid, in particular flushed with liquid.
- liquid film can be formed on the counter-electrode.
- the counter-electrode can be sprayed with liquid on its surface facing the emission electrode or can be partially immersed in a liquid or gel bath in order to be continuously wetted with the liquid.
- the counter-electrode, in particular its surface can be completely washed over by an at least temporarily moving, in particular continuously flowing, liquid film, with the liquid film having a film thickness in the range from 0.1 mm to 1 mm, for example.
- the counter-electrode can, for example, be inclined with respect to the direction of gravitation, so that the liquid flows along or down the counter-electrode essentially under the influence of gravitation.
- a liquid film can be understood, for example, as a closed, uninterrupted mass of liquid which essentially completely covers the counter-electrode.
- the Room air cleaner a device for wetting the counter-electrode with liquid.
- the liquid wetting device can be provided to realize the wetting of the counter-electrode with liquid alone or together with the fog generator.
- the liquid wetting device can be designed, for example, as a nozzle or atomizer.
- the liquid wetting device is/are set up to form a liquid film on the counter-electrode that moves at least temporarily, in particular that flows continuously. It can be provided that the liquid film has a film thickness in the range from 0.1 mm to 1 mm.
- the electrostatic precipitator and the liquid wetting device are matched to one another in such a way that particles charged by the electrostatic precipitator get into the liquid wetting the counter-electrode, in particular into the liquid film formed on the counter-electrode.
- the particles electrically charged by the electrostatic precipitator are attracted by its counter-electrode and can thus be caught in the liquid wetting and taken away by the liquid wetting, in particular the liquid film, and transported away, in particular while the air flow cleaned by it is carried on separately and finally released back into the environment becomes.
- the liquid wetting of the counter-electrode also has the advantage that the counter-electrode is cleaned, in particular rinsed, of dirt or deposits by means of the liquid.
- the liquid wetting device can have operating states, such as an off state or a predetermined deactivated operating state, in which the counter-electrode is not wetted.
- the liquid is generally a flowable rinsing and/or collector medium, for example water, in particular also rainwater, a hygroscopic collecting material, such as sodium hydroxide dissolved in a liquid, a gel which is heated to a certain temperature, for example, so that a liquid state of aggregation is reached, such as a wax or the like, an ionic liquid, such as melted or dissolved salts, or highly viscous oils that are mixed with electrically conductive particles, such as copper, for example.
- a flowable rinsing and/or collector medium for example water, in particular also rainwater, a hygroscopic collecting material, such as sodium hydroxide dissolved in a liquid, a gel which is heated to a certain temperature, for example, so that a liquid state of aggregation is reached, such as
- the liquid may have a predetermined minimum electrical conductivity, for example at least 0.005 S/m.
- the room air cleaner can have a local liquid store.
- local is meant that the liquid reservoir is part of and/or directly associated with the room air cleaner as opposed to a separate liquid reservoir or supply.
- the liquid reservoir is arranged below the electrostatic precipitator and/or below the liquid wetting device. The liquid reservoir can serve to supply the liquid wetting device and/or the fog generator with liquid or water.
- the liquid can get back into the liquid reservoir in a structurally simple way using the weight force.
- the liquid reservoir is integrated into a liquid circuit in such a way that the liquid, which may contain particles, can flow back into the liquid reservoir after wetting the counter-electrode.
- the separated particles can be entrained by the liquid and transported to the liquid reservoir and collected there.
- Known electrostatic precipitators generally have the disadvantage that they become clogged with the separated particles, ie become soiled, so that the separating effect of the electrostatic precipitator is reduced.
- the wetting liquid prevents the separated particles from accumulating and depositing on components of the electrostatic precipitator and carries the particles away in a targeted manner, namely into the liquid reservoir.
- a method for cleaning the air in a room is provided, in particular using a room air cleaner according to the invention.
- liquid and/or solid particles are first electrically separated from the air to be cleaned while generating ozone. At least part of the generated ozone is then catalytically decomposed from the air to be treated and enriched with ozone.
- the catalyst reduces the ozone concentration in the treated air through a catalytic process or a catalytic reaction and thus reduces the health risk of the room air cleaner according to the invention.
- the ozone generated is split by the catalytic effect of the catalyst, resulting in oxygen molecules that are harmless to health.
- the air cleaner according to the invention or the room air cleaning method according to the invention is characterized in particular by a space-saving, flexible and cost-effective property, whereby an ozone reduction in the air is achieved cost-effectively, without maintenance and with a long service life, while at the same time having a high degree of electrostatic separation.
- FIG. 1 shows a schematic outline sketch of an exemplary embodiment of a room air cleaner according to the invention
- FIG. 2 shows a sectional view of a section of an exemplary embodiment of a room air cleaner according to the invention.
- Figure 3 is a schematic perspective view of an ozone catalyst combined with a discharge system.
- a room air cleaner according to the invention is generally given the reference number 1 .
- the room air cleaner 1 can fulfill various functions depending on the operating state or by structurally simple expansion, namely air humidification, air purification, air washing and particle separation, which makes the air purification particularly effective.
- the room air cleaner 1 is a free-standing device or a small electrical device which is primarily intended for use in building rooms, for example on a table or in to be placed on a shelf.
- FIG. 1 shows a schematic outline sketch of an exemplary embodiment of a room air cleaner according to the invention to illustrate its mode of operation.
- the room air cleaner i according to FIG. i essentially has the following Main components: a housing 3; an electrostatic precipitator 5; an air duct 7 which, according to FIG. 1, has a central deflection body 9; and an air aftertreatment system which is connected downstream of the electrostatic precipitator 5 in the air flow direction and which, according to FIG. All components of the room air cleaner 1 according to the invention are accommodated or accommodated within the housing 3 .
- the air to be treated which is generally provided with the reference number 17 and which contains liquid and/or solid particles, is introduced laterally into the interior of the housing 3 via an air inlet 19 and fed to the electrostatic precipitator 5 .
- the separated liquid and/or solid particles which are generally identified by the reference number 20, are transported away to a collection container 21, which is also arranged inside the housing 3, while the cleaned fresh air, which is identified by the reference number 23, via the Air duct 7 is deflected in the direction of the air treatment system 11.
- the clean air After passing through the air after-treatment system 11, the clean air, which has been cleaned and has a reduced ozone content and which is provided with the reference number 25, leaves the housing 3 or the room air cleaner 1 in the direction of the environment via an air outlet, which can have grid-like or lamellar-like outlet openings 29, for example.
- the air duct 7 and in particular the supply of the cleaned and ozone-enriched air flow 23 into the air after-treatment device 21 and out of the device 1 into the environment is explained in more detail with reference to FIG. A schematic depiction of the air aftertreatment device 11 is shown in FIG.
- the section of the room air cleaner 1 from FIG. 2 is to be understood downstream of the deflection body 9 shown in FIG.
- the room air cleaner 1 also includes electronics 33 housed in a particularly centrally arranged electronics housing 31, in which, for example, the high-voltage device for the electrostatic precipitator 5 is housed.
- the direction of air flow downstream of the deflection body 9 is indicated schematically by means of the solid arrow with the reference number 35 .
- Air flow downstream of the electrostatic precipitator 5 and air flow upstream of the air outlet 27 is the air aftertreatment system 11 which is shown in FIG
- the embodiment shown in FIG. 2 consists, for example, of a sandwich structure of a discharge system 15 and an ozone catalyst 13 .
- the air outlet 27 is formed in FIG.
- the air after-treatment system 11 is fastened to the housing 3 of the room air cleaner 1 via a clamp-like housing mount 39 and held in position.
- the housing frame 39 is also shown schematically in a perspective view in FIG.
- the housing enclosure 39 protects the ozone catalyst 13 and the discharge system 15 from the environment and, in particular, seals them from liquids.
- the housing frame 39 includes a plurality of attachment interfaces 41 via which the housing frame 39 can be connected to the housing 3 of the room air cleaner 1, for example screwed.
- FIG. 3 shows the schematic series connection or sandwich structure of the discharge system 15 connected upstream in the direction of flow and the ozone catalyst 13 connected downstream in the direction of flow.
- the air after-treatment system 11 is combined with the exemplary embodiments of FIGS. 2-4 by four individual modules of an ozone catalyst 13 and a discharge system 15 to form a rectangular structure.
- the individual modules are dimensioned in such a way that they form a square when assembled.
- the air treatment system 11 including the housing frame 39 can thus be integrated into the room air cleaner 1 as a unit and dismantled if replacement is necessary.
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrostatic Separation (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021125570.8A DE102021125570A1 (de) | 2021-10-01 | 2021-10-01 | Raumluftreiniger mit Ozonkatalysator |
| PCT/EP2022/076695 WO2023052299A1 (de) | 2021-10-01 | 2022-09-26 | Raumluftreiniger mit ozonkatalysator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4408587A1 true EP4408587A1 (de) | 2024-08-07 |
Family
ID=83902752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22793153.2A Withdrawn EP4408587A1 (de) | 2021-10-01 | 2022-09-26 | Raumluftreiniger mit ozonkatalysator |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240408615A1 (de) |
| EP (1) | EP4408587A1 (de) |
| CN (1) | CN118338970A (de) |
| DE (1) | DE102021125570A1 (de) |
| WO (1) | WO2023052299A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4552731A1 (de) * | 2023-11-10 | 2025-05-14 | SKAN Deutschland GmbH | Luftreinigungsvorrichtung, containment und dessen verwendung |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6029532A (ja) * | 1983-07-26 | 1985-02-14 | Nippon Soken Inc | 空気清浄器 |
| JP3393270B2 (ja) | 1994-10-17 | 2003-04-07 | 増田 佳子 | コロナ放電ユニット |
| JPH08309229A (ja) | 1995-05-16 | 1996-11-26 | Sanyo Electric Co Ltd | 静電式空気清浄装置 |
| US20050095182A1 (en) | 2003-09-19 | 2005-05-05 | Sharper Image Corporation | Electro-kinetic air transporter-conditioner devices with electrically conductive foam emitter electrode |
| US20070180996A1 (en) * | 2006-02-09 | 2007-08-09 | Oreck Holdings, Llc | Tower air cleaner with improved airflow |
| US7857890B2 (en) * | 2006-02-28 | 2010-12-28 | Oreck Holdings, Llc | Air cleaner including ozone removal |
| ES2323823B1 (es) | 2006-10-26 | 2010-05-25 | Bsh Electrodomesticos España, S.A. | Dispositivo separador de particulas electrostaticas. |
| US20090010801A1 (en) * | 2007-05-15 | 2009-01-08 | Murphy Oliver J | Air cleaner |
| CN201363833Y (zh) | 2009-03-12 | 2009-12-16 | 李燕 | 集中式空气处理器 |
| WO2013065206A1 (ja) | 2011-11-02 | 2013-05-10 | 三菱電機株式会社 | 微生物・ウイルスの捕捉・不活化装置及びその方法 |
| US9056277B1 (en) | 2013-03-14 | 2015-06-16 | Johannes Schieven | Filter coating composition and method |
| CN106949561B (zh) * | 2017-04-28 | 2023-06-23 | 深圳市力德诺华科技有限公司 | 一种一体化复合式空气净化装置 |
| CN109663666B (zh) * | 2019-02-18 | 2024-07-23 | 孟金来 | 空气净化无风机径流式电除尘装置 |
-
2021
- 2021-10-01 DE DE102021125570.8A patent/DE102021125570A1/de not_active Ceased
-
2022
- 2022-09-26 CN CN202280078411.5A patent/CN118338970A/zh active Pending
- 2022-09-26 WO PCT/EP2022/076695 patent/WO2023052299A1/de not_active Ceased
- 2022-09-26 US US18/697,582 patent/US20240408615A1/en not_active Abandoned
- 2022-09-26 EP EP22793153.2A patent/EP4408587A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US20240408615A1 (en) | 2024-12-12 |
| CN118338970A (zh) | 2024-07-12 |
| DE102021125570A1 (de) | 2023-04-06 |
| WO2023052299A1 (de) | 2023-04-06 |
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