EP3376117B1 - Unité filtrante pour hotte aspirante et hotte aspirante - Google Patents

Unité filtrante pour hotte aspirante et hotte aspirante Download PDF

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Publication number
EP3376117B1
EP3376117B1 EP18157660.4A EP18157660A EP3376117B1 EP 3376117 B1 EP3376117 B1 EP 3376117B1 EP 18157660 A EP18157660 A EP 18157660A EP 3376117 B1 EP3376117 B1 EP 3376117B1
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EP
European Patent Office
Prior art keywords
comb
housing
filter unit
unit
filter
Prior art date
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Active
Application number
EP18157660.4A
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German (de)
English (en)
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EP3376117A1 (fr
Inventor
Georg Hepperle
Daniel Vollmar
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Publication of EP3376117A1 publication Critical patent/EP3376117A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2035—Arrangement or mounting of filters
    • 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

Definitions

  • the invention relates to a filter unit for a fume hood, in particular a fume hood, and a fume hood.
  • extractor hoods in particular extractor hoods, which are operated in a kitchen
  • mechanical filters are usually used in the extractor hood.
  • Expanded metal filters, perforated sheet metal filters, baffle filters, which can also be referred to as eddy current filters, edge extraction filters and porous foam media are used as mechanical filters, for example.
  • a fume hood in which an electrostatic filter unit is used.
  • the electrostatic filter unit in this extractor hood consists of plate-shaped separation and counter electrodes as well as wire-shaped ionization electrodes.
  • the plate-shaped separator and counter-electrodes are connected to one another via electrically conductive webs and are arranged in such a way that the air entering the filter element first flows against the separator electrodes with wire-shaped ionization elements in between and then reaches the counter-electrodes offset upwards.
  • a disadvantage of this filter unit is that its construction is complex. In addition, the filter unit cannot be removed from the extractor hood due to its design.
  • the dust collecting mechanism may include a charging unit and a dust collecting unit in which dust charged by the charging unit is collected.
  • the dust collection unit includes a first electrode and a second electrode.
  • Each of these electrodes includes a grid-like base containing a large number of air passages having.
  • the base has a large number of projections that are the same as the
  • the EP 2 309 198 A1 discloses a filter unit according to the preamble of appended claim 1.
  • the object of the present invention is therefore to create a filter unit for a fume hood and a fume hood that has a simple structure, is easy to handle and still allows reliable cleaning of fumes and vapors and other polluted air.
  • the invention is based on the finding that this object can be achieved by using a modular electrostatic filter system consisting of individual, removable, portable filter units, which can also be referred to as filter modules or filter cassettes.
  • the filter mechanism is based on the electrostatic filter principle and the collecting electrodes and the counter-electrodes of the separating stage are each designed in one piece and accommodated in a common housing.
  • a filter unit for a fume hood comprising an ionization unit with at least one ionization element and at least one counter-electrode and a separating unit with at least one collecting electrode and at least one counter-electrode.
  • the filter unit is characterized in that the ionization unit and the separating unit are accommodated in a common housing, the collecting electrodes and the counter-electrodes each represent ribs of a comb profile, which are each connected to one another via a comb base, which is a plate is designed, the comb profile of the collecting electrode and the comb profile of the counter-electrodes each represent a one-piece component and the comb profiles interlock in such a way that the ribs of the comb profile of the collecting electrodes and the ribs of the comb profile of the counter-electrodes are arranged alternately.
  • the filter unit is also referred to as a filter module.
  • the filter unit is a portable filter unit that can be removed from the fume hood and is preferably preassembled.
  • a filter unit is referred to as pre-assembled, which can be built into the extractor hood as a structural unit and can be removed from it in one unit.
  • a fume hood is a fume hood device that can be, for example, a fume hood or a ceiling fan.
  • the fume hood has a suction gap.
  • the extraction gap can be formed, for example, between an extractor housing and a baffle plate arranged offset below the extractor housing.
  • the suction gap can also be referred to as edge suction gap.
  • the filter unit includes an ionization unit, which can also be referred to as an ionization stage, and a separation unit, which can also be referred to as a separation stage.
  • the ionization stage has at least one ionization element and at least one counter-electrode.
  • the separation stage has at least one collecting electrode and at least one counter-electrode.
  • the separation stage is downstream of the ionization stage in the flow direction of the filter unit. Voltage, preferably high voltage, is applied to the ionization element.
  • a discharge electrode When contaminated air flows through the ionization stage, solid and liquid substances are electrostatically charged by means of the ionization element, which can also be referred to as a discharge electrode.
  • the precipitation electrodes and the counter-electrodes of the separation stage represent ribs of a comb profile.
  • the ribs of the comb profile are plate-shaped.
  • the ribs are connected to each other via a comb bottom and thus form the comb profile.
  • the comb profile can therefore also be referred to as a rib profile, web ribs or web profile.
  • the comb profile of the collecting electrode and the comb profile of the counter-electrodes are each a one-piece component.
  • the ribs are inextricably linked to the comb base.
  • the rib profiles can be produced, for example, by continuous casting.
  • the Comb profiles are arranged in the filter unit in such a way that they interlock in such a way that the ribs of the comb profile of the collecting electrodes and the ribs of the comb profile of the counter-electrodes are arranged alternately.
  • the comb profiles are arranged in such a way that the ribs of the comb profile of the collecting electrodes and the ribs of the comb profile of the counter electrodes do not touch.
  • the air flows through the separating unit in a main flow direction, which runs parallel to the bottoms of the oppositely arranged comb bottoms and along the ribs of the comb profiles.
  • the precipitation electrodes i.e. the comb profile
  • the counter-electrodes i.e. the comb profile
  • an electrostatic field is formed between the positive and the negative electrode.
  • the solid and liquid material particles which are already electrically charged in the ionization unit, are deflected from their flow path by the electrostatic field and separated on the comb profiles, i.e. the precipitation electrodes and counter electrodes.
  • the comb profiles are designed in one piece, the manufacture and handling of the filter unit are simplified.
  • the distances between the plate-shaped ribs of each comb profile, which are arranged parallel to one another, are fixed and do not have to be fixed when the filter unit is installed in the fume hood.
  • the stability of the comb profile is increased by the one-piece design of the respective comb profile.
  • the bottom of the comb, which connects the ribs of the comb profile to one another is designed as a plate.
  • the stability is particularly good.
  • An increase in stability has the advantage, on the one hand, that accidental contact between the collecting electrodes and the counter-electrodes can be prevented and a short circuit can thus be ruled out.
  • the increased stability also improves the handling of the filter unit, so that it can be removed from the fume hood, for example, and cleaned in the dishwasher, for example. Also at Due to the stability of the comb profiles, there is no risk of deformation of the profiles after this cleaning.
  • the filter unit comprises a housing.
  • the housing is preferably made of electrically non-conductive material. Both the ionization unit and the separation unit are accommodated in the housing.
  • the housing thus represents a common housing for these two units. Since the filter unit has such a housing, it can easily be inserted into the fume hood or removed from it.
  • the housing has a box shape.
  • the bottom and top wall of the housing and two side walls are formed by airtight panels.
  • the front and back of the housing are open or formed by an air-permeable component, in particular a grid.
  • Directions such as up, down, front and back refer, unless otherwise stated, to a filter unit in a state in which it is placed in a vertical suction gap of a fume hood.
  • the front side is understood to mean the outwardly directed side through which air can enter the filter unit.
  • the back faces the interior of the extractor hood.
  • the width of the housing and thus the width of the filter unit are preferably greater than their height.
  • the comb profiles are arranged in the housing in such a way that the ribs of the comb profiles extend in the height direction of the housing.
  • the filter unit has a housing made of electrically non-conductive material, which consists of at least two housing parts.
  • the housing parts can also be referred to as housing shells.
  • One housing part preferably comprises the top wall and at least part of the two side walls of the housing and the second housing part comprises the bottom and at least the other part of the side walls of the housing.
  • a protective grille can be provided on one or both parts of the housing, which extends over the Front of the housing parts extends.
  • the first housing part can, for example, be referred to as the lower part of the housing and the second or further housing part can be referred to as the upper part of the housing.
  • the comb profile of the collecting electrodes can be held in the first housing part and the comb profile of the counter-electrodes of the separating unit can be held in the second housing part.
  • the comb profiles are attached to the respective housing part, for example glued or latched, or are made in one piece with it. For example, in the case of a housing made of plastic, the comb profile can be injected into the respective housing part.
  • the two housing parts are attached to one another via at least one attachment point.
  • the attachment points are preferably placed on the sides of the housing parts.
  • the attachment points can be formed, for example, by screw bosses or latching projections.
  • the attachment points can be arranged on the outside of the housing or on the inside of the housing.
  • the housing consists of two housing parts and a comb profile is held on each housing part, the assembly of the filter unit is simplified. In particular, only the two housing parts have to be connected to one another.
  • the counter-electrode(s) of the ionization unit are also particularly preferably held on the housing parts. This can be attached to the housing parts or integrated into them.
  • the ionization element is preferably attached via attachment points between the housing parts.
  • the attachment points can be, for example, screw domes or latching projections that are located on the top of the lower housing part and the underside of the upper housing part.
  • Corresponding passages for connecting means, such as screws, are provided in the ionization element.
  • the comb profiles are in addition to the connection via the housing parts or alternatively to this connection via at least connected to each other by an electrically non-conductive spacer.
  • the spacer can also be referred to as an insulating element.
  • the ionization element in the ionization unit extends perpendicular to the surface directions of the ribs of the comb profiles of the separating unit.
  • the ribs preferably lie in the height direction of the filter unit and the ionization element therefore preferably extends in the width direction of the filter unit.
  • the counter electrode(s) of the ionization unit also lie in the width direction. Since the ionization element and the counter-electrode(s) of the ionization unit are perpendicular to the ribs of the comb profiles, a single ionization element is sufficient to ionize impurities that flow to the ribs.
  • the ionization element preferably extends over the entire width of the filter unit, so that it lies in front of all the ribs of the comb profiles.
  • the structure of the filter unit is further simplified by the perpendicular orientation of the ionization element to the ribs.
  • the ionization element can also be referred to as a discharge electrode.
  • the ionization element can be an electrically conductive wire.
  • the ionization element preferably has a sawtooth profile.
  • An elongated component is referred to as a sawtooth profile, from which sawteeth protrude on at least one side.
  • the saw teeth can protrude, for example, from the upper side and the underside of the ionization element.
  • a counter-electrode is provided in the ionization unit above and below the ionization element, and the saw teeth are directed towards these counter-electrodes.
  • the saw teeth are only provided on one side of the saw tooth profile.
  • the ionization unit can only have a single counter-electrode. This is then arranged with respect to the ionization element in such a way that the saw teeth are directed towards the counter-electrode.
  • attachment points of the housing parts and attachment points of the ionization element are provided on the inside of the housing, they are preferably located in a space delimited from the air flow by a barrier wall.
  • the attachment points are particularly preferably in the lateral areas of the housing.
  • the barrier wall covers at least part of the front of the housing and protrudes into the interior of the housing.
  • the barrier wall is aligned with a ridge of comb profile in the angled portion. In this case, a space is formed by the barrier wall and the rib, which is delimited from the air flow through the filter unit.
  • the counter-electrode of the separating unit is designed as one part with the counter-electrode of the ionization unit.
  • the counter-electrode of the ionization unit can be, for example, an extension of the comb bottom of the comb profile of the counter-electrodes of the separation unit. This further simplifies the structure of the filter unit.
  • At least one electrical contact element for current and voltage connection is provided on at least one housing wall of the housing. This possibility of contact from the outside simplifies the installation of the filter unit in the extractor hood.
  • the housing parts have insulating webs which cover at least the front edge of the ribs of the comb profiles and preferably the front edge and the rear edge of the ribs of the comb profiles.
  • the insulating webs extend from the bottom of the housing or from the top wall of the housing into the interior of the housing and have a height that corresponds to the height of the ribs of the comb profile.
  • the filter unit has a protective grid.
  • the protective grid serves to increase the stability of the filter unit and, on the other hand, prevents the user from accessing the ionization unit or separation unit.
  • the invention relates to a fume hood with at least one filter unit.
  • the fume hood is characterized in that at least two filter units designed according to the invention are detachably fastened in the fume hood.
  • filter units according to the invention are provided in the extractor and these represent removable structural units, the modular construction of the filter system of the extractor can be implemented in a simple manner.
  • the filter units are also detachably attached to the extractor hood. This means that the filter units can be removed from the fume hood for cleaning purposes, for example.
  • the filter units are preferably installed in a vertically running suction gap of the extractor hood.
  • the filter units can simply be pushed into the suction gap.
  • Contact points are provided on the fume hood, which are positioned in such a way that contact elements provided on the individual filter units can be connected to the contact points and the filter units can be supplied with voltage via them.
  • the filter system consists of individual, removable, portable filter modules, which can also be referred to as filter cassettes.
  • the filter mechanism in each of the filter units is based on the electrostatic filter principle.
  • Each individual filter module consists of an ionization unit (ionization stage) and a separation unit (separation stage) downstream in the air flow direction.
  • ionization stage solid and liquid substances are electrically charged as they flow through by means of an ionization element under electrical high voltage and are separated in the downstream separation stage, which consists of comb profiles arranged one inside the other.
  • the ionization element which can also be referred to as a spray electrode, generates ozone that neutralizes unpleasant odors in the air.
  • FIG 1 an embodiment of a fume hood 1 according to the invention, which can also be referred to as a fume hood device, is shown.
  • the fume hood 1 has a fume hood housing 10 and a baffle plate 11 lying below, ie in front of the underside of the fume hood housing 10 in the direction of flow.
  • a suction gap 12 which can also be referred to as a suction gap, is formed between the underside of the extractor housing 10 and the baffle plate 11.
  • Several filter units 2 are introduced into the suction gap 12 . In the view shown, two filter units 2 are installed across the width of the extractor 1 and one filter unit 2 across the depth of the extractor 1 .
  • the fume hood 1 is fitted above a stove 3 and can be accommodated, for example, in the ceiling (not shown), with at least the suction gap 12 being at least temporarily below the ceiling.
  • the filter units 2 are in the figure 1 only the protective grilles 202, which form the front sides of the filter units 2, can be seen.
  • the filter unit 2 has a lower housing part 201 and an upper housing part 200 which together form the housing 20 .
  • the two housing parts 200 and 201 each have the same height in the illustrated embodiment.
  • the lower housing part 201 consists of a floor and two side wall pieces.
  • the upper housing part 200 consists of a top wall and two side wall pieces.
  • Each of the housing parts 200, 201 has a protective grille 202 on the front side.
  • the protective grille 202 is in one piece and is either a separate component or is connected to the upper or lower housing part 200, 201.
  • contact elements 25 , 26 are also arranged on the upper side of the housing 20 , that is to say on the top wall of the upper housing part 200 .
  • FIG 3 the inside of the filter unit 2 can be seen.
  • the ionization unit 22 includes an ionization element 220, which can also be referred to as a discharge electrode.
  • two counter-electrodes 221, 222 are provided.
  • the counter electrodes 221, 222 are in the front area of the lower housing part 201, in particular on the bottom of the lower Housing part 201 or in the front area of the upper housing part 200, in particular on the underside of the top wall of the upper housing part 200 is arranged and fixed.
  • the ionization element 220 extends in the width direction of the housing 20 and is arranged halfway up the height of the housing 20 . Thus, the ionization element 220 lies in the middle between the counter-electrodes 221, 222 and is parallel to them.
  • the ionization element 220 which, for example, the in figure 4 shown shape of a two-sided sawtooth profile 2200, between the negative counter-electrodes 221, 222.
  • an electrostatic ionization field forms in the direction of the two grounded counter-electrodes.
  • the sawtooth profile can also be referred to as spike electrodes.
  • the saw teeth of the two rows of saw teeth, ie the row of saw teeth directed upwards and downwards, are offset from one another in order to obtain a high level of ionization.
  • the ionization element is installed in the housing 20 of the filter unit 2 for effective charging in the horizontal position or installation situation.
  • a thin wire (not shown) can also be used as the ionization element 220.
  • wires with a diameter of >0.1 mm, for example, can be used.
  • the rear area of the filter unit 2 is in the figure 3 formed by the separation unit 21.
  • the comb profile 210 of the counter-electrodes of the separating unit 21 and the comb profile 211 of the collecting electrodes are in this area.
  • figure 5 1 shows the structure of the embodiment of the filter unit 1 according to the invention figure 2 shown in exploded view.
  • an ionization element 220 in particular a discharge electrode, is provided in the ionization stage 22.
  • the ionization element 220 is arranged between two negative counter-electrodes 221, 222.
  • solid and liquid substances are electrostatically charged by means of the discharge electrode 220.
  • the separation stage 21 downstream in the direction of flow consists of differently, alternately charged electrodes which are arranged alternately.
  • comb profiles 210, 211 are used, which interlock but do not touch at the ribs.
  • One comb profile 211 or the ribs of this comb profile 211 form the positive collecting electrode, which is under electrical high voltage, and the comb profile 210 forms the negative counter-electrode.
  • the upper comb profile 211 is oriented with its ribs projecting downward and the lower comb profile 210 is oriented with its ribs projecting upward.
  • Insulating webs 203 are arranged on the upper housing part 200 on the side facing the inside of the housing 20 and extend downwards into the interior of the housing 20 .
  • the insulating webs 203 have a height that corresponds to the height of the upper comb profile 211. Insulating webs 203 are arranged on the lower housing part 201 on the side facing the inside of the housing 20 and extend upwards into the interior of the housing 20 . The insulating webs 203 have a height that corresponds to the height of the lower comb profile 210 . In the illustrated embodiment, an insulation element 212 is arranged on the laterally outer ribs of the lower comb profile 210 and extends upwards over the ribs. This insulating element 212, which can also be referred to as a spacer, reliably keeps the comb profiles 210, 211 at a distance from one another. This function is shown schematically in figure 9 shown.
  • a protective grid 202 which serves as protection against access, is implemented in the housing 20.
  • the protective grille 202 serves to protect against direct contact with the ionization element 220.
  • various insulation elements 212 can also be used, which serve as spacers between the comb profiles 210, 211 and increase the mechanical rigidity of the entire filter unit 2.
  • the electrical current and voltage are supplied to the filter unit 2 by means of the electrical contact elements 25, 26.
  • the electrical contact elements 25, 26 are shown on the upper side of the housing 20, they can alternatively also be provided on another side of the filter unit.
  • FIG 6 a further embodiment of the filter unit according to the invention is shown. This embodiment differs from that in figure 2 shown embodiment only by the structure of the ionization unit 22. The rest of the structure is the same and will not be described again.
  • a single-row or multi-row sawtooth ionization element 2201 is arranged in the area of the top wall of the upper housing part 200 .
  • the saw teeth of the ionization element 220 are directed downwards.
  • the counter-electrode 221 of the ionization unit 22 is arranged on the bottom of the lower housing part 201 in the front area.
  • the electrical ionization field expands only in the direction of the one negative counter-electrode 221 .
  • the sawtooth rows of the ionization element 220 can have one or more stages. For the most effective ionization possible, the saw teeth of the individual rows of saw teeth should be offset from one another.
  • An advantage of building after figure 6 is that no negative component such as the counter electrode 222 in the first embodiment of FIG figure 2 , is in close proximity to the positive collecting electrode 211 which is under voltage. This increases the resistance to electrical tracking and short-circuits.
  • angular and pointed edges are avoided at the transitions on the two comb profiles 210, 211 and the negative counter-electrodes 221, 222, because very high electrical field strengths are formed at pointed and angular transitions and thus electrical encourage rollovers.
  • all transitions (edges, corners) of the comb profiles 210, 211 or grounded counter-electrodes 221, 222 are rounded with a radius of >0.2 mm, for example.
  • the two-sided end faces of the comb profiles 210, 211 i.e. the collecting electrode and counter-electrode of the separating unit 21, can be covered or coated with insulating material, for example with an insulating plastic.
  • connection between the positive collecting electrode, i.e. the comb profile 211, and the negative counter-electrode, i.e. the comb profile 210, is preferably made in the illustrated embodiments via lateral attachment points 23 of the electrically insulating housing 20 and the additional insulation elements 212.
  • the attachment points 23 are in the figures 8 and 10 to recognize.
  • the fastening points 23 represent inwardly directed domes, into which latching elements (not shown) of the other housing part can engage, for example.
  • these lateral attachment points 23 of the comb profiles 210, 211 via the housing 20 and the attachment points 24 of the ionization element 220 to the housing 20 are arranged in a shielded area.
  • a barrier wall 27 is provided on the front of the housing 20, which shields the lateral area from the front.
  • the barrier wall 27 is angled in such a way that it extends into the interior of the housing 20 .
  • the housing of the filter unit according to the invention which can also be referred to as an electrostatic filter module, is preferably made of a high-voltage-resistant plastic.
  • a potential plastic comes here, for example Glass fiber reinforced polybutylene terephthalate (PBT) or polyphenylene sulfide (PPS) are used.
  • PBT polybutylene terephthalate
  • PPS polyphenylene sulfide
  • the material properties in terms of mechanical rigidity, low water absorption capacity, water-repellent surfaces and resistance to chemically aggressive substances can be significantly improved by adding additives.
  • the positive collecting electrodes or negative counter-electrodes of the separating unit consist of an electrically conductive material.
  • Electrically conductive plastics are optionally used. Glass fiber reinforced polybutylene terephthalates (PBT) can also be used here, for example.
  • PBT polybutylene terephthalates
  • the addition of additives to the plastic also improves certain properties in terms of resistance to chemically aggressive substances, high mechanical strength, water-repellent surfaces and low water absorption capacity.
  • Metallic materials such as aluminum or stainless steel can be used as an alternative to electrically conductive plastics.
  • the negative counter-electrodes of the ionization unit are electrically conductive and, like the electrodes of the separating unit, can consist of an electrically conductive plastic with the properties already mentioned or, as an alternative, can consist of a metallic material.
  • all surfaces can optionally be coated with an antibacterial coating or added to the plastic material as an additive.
  • the electrodes of the separation unit and the counter-electrodes of the ionization unit can be coated with an ozone-neutralizing coating in order to neutralize the ozone in the filter module.
  • the ozone-neutralizing material can also be added to the plastic as an additive during the manufacture of the items mentioned.
  • the present invention can be used in fume hoods and similar fume extraction systems and electrostatic air cleaners in the function of a fine dust filter.
  • the advantage of this invention over the known grease filter technologies currently in use is the significantly higher filter efficiency when filtering solid and liquid substances from the steam air flow.
  • liquid and solid particles smaller than 1 ⁇ m are filtered out of the vapor air flow.
  • the downstream extractor components are protected from dirt and other contaminants.
  • the downstream odor filters such as activated carbon filters and zeolite filters for odor filtration, are thus protected from solid and liquid vapor deposits, which increases the service life of the odor filters.
  • Further advantages of the present invention are, for example, the very high filter performance with low air flow difficulties.
  • a very high filter efficiency can be achieved with the electrostatic filter unit according to the invention even at low volume flows or air flow speeds.
  • the electrostatic filter unit according to the invention also has a low pressure drop.
  • the separation unit consists of comb profiles with preferably lateral attachment points. There is therefore no contact between the ribs of the respective electrodes.
  • the attachment points between the collecting electrodes and the counter-electrodes of the separating unit, ie the positive and negative comb profile, are preferably located in the flow-calmed room and not directly in the air-flowing room. This prevents water and grease deposits and other electrically conductive impurities from causing electrical creepage distances and short circuits between the two comb profiles.
  • the filter units can also be used in the extractor hood outside of the cooking process as room air cleaners due to the very high filter efficiency, for example in circulating air mode to improve indoor air quality.
  • odors can be neutralized by ozone, which is generated in the ionization unit by the ionization element.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrostatic Separation (AREA)

Claims (13)

  1. Unité filtrante pour une hotte aspirante (1), comprenant une unité d'ionisation (22) avec au moins un élément d'ionisation (220) et au moins une contre-électrode (221, 222) et une unité de séparation (21) avec au moins une électrode de précipitation et au moins une contre-électrode, l'unité de séparation (21) étant montée en aval de l'unité d'ionisation (22) dans une direction d'écoulement, l'unité d'ionisation (22) et l'unité de séparation (21) étant logées dans un boîtier commun (20),
    caractérisée en ce que les électrodes de précipitation et les contre-électrodes représentent des nervures d'un profilé en peigne (210, 211) qui sont reliées entre elles respectivement par un fond de peigne qui est réalisé sous forme de plaque, le profilé en peigne (211) de l'électrode de précipitation et le profilé en peigne (210) des contre-électrodes représentent respectivement un composant monobloc et les profilés en peigne (210, 211) viennent en prise mutuellement de telle sorte que les nervures du profilé en peigne (211) des électrodes de précipitation et les nervures du profilé en peigne (210) des contre-électrodes sont agencées alternativement, et en ce que l'air circule à travers l'unité de séparation (21) dans une direction d'écoulement principale qui s'étend parallèlement aux fonds des fonds de peigne opposés et le long des nervures des profilés en peigne (210, 211).
  2. Unité filtrante selon la revendication 1, caractérisée en ce que l'unité filtrante (2) présente un boîtier (20) en matériau non conducteur électriquement, qui se compose d'au moins deux parties de boîtier (200, 201), dans la première partie de boîtier (200) étant maintenu le profilé en peigne (211) des électrodes de précipitation et dans la seconde partie de boîtier (201) étant maintenu le profilé en peigne (210) des contre-électrodes, et les deux parties de boîtier (200, 201) étant fixées l'une à l'autre par au moins un point de fixation (23).
  3. Unité filtrante selon l'une quelconque des revendications 1 ou 2, caractérisée en ce que les profilés en peigne (210, 211) sont reliés mutuellement par au moins une entretoise non conductrice électriquement (212).
  4. Unité filtrante selon l'une quelconque des revendications 1 à 3, caractérisée en ce que l'élément d'ionisation (220) s'étend dans l'unité d'ionisation (22) perpendiculairement aux surfaces des nervures des profilés en peigne (210, 211) de l'unité de séparation (21).
  5. Unité filtrante selon l'une quelconque des revendications 1 à 4, caractérisée en ce que l'élément d'ionisation (220) est un profilé en dents de scie (2200, 2201).
  6. Unité filtrante selon la revendication 5, caractérisée en ce que les dents de scie sont prévues sur un côté du profil en dents de scie (2201) et l'unité d'ionisation (22) présente une seule contre-électrode (221).
  7. Unité filtrante selon l'une quelconque des revendications 2 à 6, caractérisée en ce que les points de fixation (23) des parties de boîtier (200, 201) et les points de fixation (24) de l'élément d'ionisation (220) sur le boîtier (20) sont situés dans un espace délimité par une paroi d'arrêt (27) du flux d'air.
  8. Unité filtrante selon l'une quelconque des revendications 1 à 7, caractérisée en ce que la contre-électrode (210) de l'unité de séparation (21) est réalisée en une seule pièce avec la contre-électrode (221) de l'unité d'ionisation (22).
  9. Unité filtrante selon l'une quelconque des revendications 1 à 8, caractérisée en ce qu'au moins un élément de contact électrique (25, 26) est prévu sur au moins une paroi de boîtier du boîtier (20) pour une connexion de courant et de tension.
  10. Unité filtrante selon l'une quelconque des revendications 2 à 9, caractérisée en ce que les parties de boîtier (200, 201) présentent des traverses d'isolation (203) qui recouvrent au moins les bords avant des nervures des profilés en peigne (210, 211) et de préférence les bords avant et les bords arrière des nervures des profilés en peigne (210, 211).
  11. Unité filtrante selon l'une quelconque des revendications 1 à 10, caractérisée en ce que l'unité filtrante présente une grille de protection (202).
  12. Hotte aspirante avec au moins une unité filtrante, caractérisée en ce qu'au moins deux unités filtrantes (2) selon l'une des revendications 1 à 11 sont fixées de manière amovible dans la hotte aspirante (1).
  13. Hotte aspirante selon la revendication 12, caractérisée en ce que les unités filtrantes (2) sont placées dans une fente d'aspiration (12) s'étendant verticalement de la hotte aspirante (1).
EP18157660.4A 2017-03-13 2018-02-20 Unité filtrante pour hotte aspirante et hotte aspirante Active EP3376117B1 (fr)

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CN110848779A (zh) * 2019-11-27 2020-02-28 陈秉江 可替换滤网的抽油烟机油网
DE102020203314A1 (de) 2020-03-16 2021-09-16 Volkswagen Aktiengesellschaft Luftreinigungsanordnung für ein Kraftfahrzeug
CN113310097A (zh) * 2021-07-08 2021-08-27 成都前锋电子有限责任公司 一种带自动清洗的油烟净化设备

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Publication number Priority date Publication date Assignee Title
EP1058066A2 (fr) * 1999-05-31 2000-12-06 O-DEN Corporation Dépoussiéreur électrique

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DE2146288A1 (de) 1971-09-16 1973-03-22 Bosch Hausgeraete Gmbh Kuechendunstabzugshaube zum abscheiden von wrasen und verunreinigungen aus der raumluft
JPS60132661A (ja) * 1983-12-20 1985-07-15 Nippon Soken Inc 空気清浄器
JP2010007871A (ja) * 2008-06-24 2010-01-14 Daikin Ind Ltd 換気装置
TW201111713A (en) * 2009-09-17 2011-04-01 Chih-Hsing Chen Household soot exhaust

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Publication number Priority date Publication date Assignee Title
EP1058066A2 (fr) * 1999-05-31 2000-12-06 O-DEN Corporation Dépoussiéreur électrique

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