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
  • B03C3/02—Plant or installations having external electricity supply
  • B03C3/04—Plant or installations having external electricity supply dry type
  • B03C3/08—Plant or installations having external electricity supply dry type characterised by presence of stationary flat electrodes arranged with their flat surfaces parallel to the gas stream
• • 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
  • B03C3/04—Plant or installations having external electricity supply dry type
  • B03C3/09—Plant or installations having external electricity supply dry type characterised by presence of stationary flat electrodes arranged with their flat surfaces at right angles to the gas stream
• • 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
  • B03C3/04—Plant or installations having external electricity supply dry type
  • B03C3/12—Plant or installations having external electricity supply dry type characterised by separation of ionising and collecting stations
• • 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
• • 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
• • 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
  • B03C3/47—Collecting-electrodes flat, e.g. plates, discs, gratings
• • 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
  • B03C2201/00—Details of magnetic or electrostatic separation
  • B03C2201/04—Ionising electrode being a wire
• • 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
  • B03C2201/00—Details of magnetic or electrostatic separation
  • B03C2201/28—Parts being easily removable for cleaning purposes
• • 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
  • B03C3/82—Housings

Definitions

• the invention relates to a filter unit for a fume hood, in particular
• Extractor hood and a fume hood with at least one filter unit.
• extractor hoods in particular extractor hoods, which are operated in a kitchen, it is known to filter out liquid and solid impurities and odors from the steam and vapors produced during cooking.
• mechanical filters are usually used in the extractor hood.
• Eddy current filter can be called, Randabsaugungsfilter and porous
• DE 2146288 A discloses an extractor hood in which an electrostatic filter unit is used.
• the electrostatic filter unit is in this hood from plate-shaped deposition and
• Counterelectrodes and wire-shaped ionization electrodes are connected to one another via electrically conductive webs and are arranged such that the air entering the filter element first of all separates the deposition electrodes with wire-shaped interposed therebetween
• Counter electrodes arrives.
• the separation electrodes are fastened to the housing of the extractor hood via a dividing wall.
• the housing of the extractor hood via a dividing wall.
• Extractor hood provided a high-voltage device, which is connected to the electrodes of the electrodes of the filter unit.
• a disadvantage of this filter unit is that its structure is complex.
• the filter unit can not be removed from the extractor hood due to its construction.
• Object of the present invention is therefore to provide a filter unit for a fume hood and a fume hood, which have a simple structure, easy to and yet allow reliable cleaning of fumes and vapors and other contaminated air.
• the invention is based on the finding that this object can be achieved by providing a filter unit which utilizes the electrostatic filter principle but nevertheless introduces it into a fume hood in a simple manner and out of this
• the object is achieved by a filter unit for a fume hood, comprising an ionization unit and a separation unit.
• Separating unit are accommodated in a common housing, which has at least one wall accessible from the outside electrical contacting element.
• the filter unit is also referred to as a filter module.
• the filter unit is a removable from the extractor, portable filter unit, which is preferably pre-assembled.
• a pre-assembled filter unit is referred to, which can be used as a unit in the extractor and removed from this in one unit.
• a fume extraction device is referred to, which may be, for example, a cooker hood or a ceiling fan.
• the extractor has a suction gap.
• the suction gap can be formed, for example, between an extractor housing and a deflector plate arranged offset below the extractor housing.
• the Absaugspalt can also be referred to as Randabsaugspalt.
• the filter unit comprises an ionization unit, which may also be referred to as an ionization stage, and a separation unit, which may also be referred to as a separation stage.
• the ionization stage preferably has at least one ionization element and at least one counterelectrode.
• the separation stage has at least one
• the separation stage is connected downstream of the ionization stage in the flow direction of the filter unit.
• the ionization element is subjected to voltage, preferably high voltage. As it flows through contaminated air through the ionization solid and liquid substances are electrostatically by means of the ionization element, which also serves as a spray can be designated, charged.
• the separation stage preferably comprises at least one precipitation electrode and at least one counterelectrode, which are configured plate-shaped and are arranged alternately in the deposition stage.
• the filter unit comprises a housing.
• the housing is preferably made of electrically non-conductive material. In the housing, both the ionization unit and the separation unit are accommodated. The housing thus represents a common housing for these two units. By having the filter unit such a housing, this can easily in the extractor
• the housing has in particular a box shape.
• the bottom and the top wall of the housing and two side walls are formed by air-impermeable plates.
• the front and back of the housing are open or formed by an air-permeable component, in particular a grid.
• Directional information such as top, bottom, front and back refer, unless otherwise indicated, to a filter unit in a state where it is placed in a vertical suction gap of a fume hood.
• the front side is understood to be the outwardly directed side through which air can enter the filter unit.
• the back faces the interior of the extractor hood.
• the housing of the filter unit has on at least one wall an externally accessible electrical contact element.
• an externally accessible electrical contact element a contact element is referred to, which can be connected without opening the housing of the filter unit to a voltage source and can be passed via the current and voltage to the electrodes located in the housing.
• the filter unit can be introduced as a component in a fume hood, for example, be inserted and removed from this again. In this case, it is ensured by the contact elements that the voltage can be applied to the electrodes of the deposition unit and ionization unit.
• the filter unit can thus be easily implemented as a module of a filter system that consists of several
• Filter units can be used.
• the housing has a cover wall, a bottom wall and at least three side walls, and one of the side walls is at least partially formed by a protective grid.
• the bottom wall is the bottom of the filter unit and the top wall is the top of the filter unit.
• the bottom and the top wall are in this case preferably in the introduced in the extractor state of the filter unit in the horizontal. This can prevent leakage of deposited in the filter unit impurities.
• the side of the housing of the filter unit which is at least partially formed by a protective grid, provides
• the front of the filter unit is in the introduced in the extractor state of the filter unit, the side of the
• the side wall that forms the front of the filter unit can be completely formed by a protective grid.
• the housing is formed on this side by a side wall which consists at least partially of a grid, on the one hand, the ingress of air can be ensured and on the other hand prevents the access of the user of the filter unit and the extractor to the internal electrodes of the filter unit become.
• the stability of the housing is increased over a forwardly open housing by the provision of a protective grid and thereby the
• a drainage channel is formed on the housing.
• the gutter is preferably formed on the back of the housing, that is, on the side opposite to the side wall formed by the protective grid.
• the gutter is formed by an extension of the bottom wall to the rear.
• the gutter may have a slope that of the back of the bottom wall of the housing of the filter unit is inclined downwards.
• Extractor not visible and dripping of dirt from the gutter from the extractor can be prevented.
• precipitation electrodes and counter electrodes are alternately arranged in the deposition unit and the precipitation electrodes and
• Counter electrodes are plates which extend parallel to the bottom of the housing of the filter unit.
• the plates which are called the precipitation electrodes and counter electrodes are arranged alternately.
• the electrodes are thus alternately electrically charged.
• the positive collecting electrodes are under positive electrical high voltage. Between the alternately arranged positive collecting electrodes and negative counter electrodes is formed in
• Precipitation electrodes and counterelectrodes of the separation unit from.
• the separator unit has a simplified structure.
• the filter unit preferably has a greater width than height. In this way, the filter unit can be easily introduced into a fume hood and in particular into a vertically extending suction gap.
• the electrodes are arranged in the deposition unit parallel to the bottom of the housing of the filter unit, therefore, a small number of electrodes is sufficient to allow deposition over the entire height and width of the filter unit.
• precipitation electrodes and counterelectrodes are arranged alternately in the precipitation unit and the precipitation electrodes and counterelectrodes represent plates which extend perpendicular to the bottom of the housing of the filter unit.
• the number of electrodes to be provided in the deposition unit is larger than in the embodiment with electrodes arranged parallel to the bottom. However, when electrodes are arranged perpendicular to the bottom of the housing, impurities deposited on the plates may run down along them and optionally in one of the housings
• the collecting electrodes and counterelectrodes which are formed by plates and are perpendicular to the bottom of the housing, each combined to form a comb profile and the comb profiles engage each other.
• the structure of the filter unit is further simplified, since only two components, namely a comb profile with collecting electrodes and a comb profile with counter-electrodes are necessary.
• the plate-shaped electrodes may also be referred to as ribs in this embodiment.
• the comb profiles can be easily attached to the housing. Through the comb bottom, which connects the plates of the respective comb profile, is also the
• Comb profiles are the precipitation electrodes and counter electrodes alternately before.
• Ionisationselement arranged, which extends parallel to the bottom of the housing. With particular preference, only a single ionization element is arranged in the ionization unit. As a result, the structure of the filter unit is further simplified. In particular, the ionisationselement can extend over the entire width of the housing of the filter unit and therefore must be attached only to the longitudinal ends. In particular, in the embodiment in which the plate-shaped electrodes of the separation unit are perpendicular to the bottom of the housing, it is ensured in a perpendicular to this lonisationselement that the air between the plate-shaped
• Electrodes are reliably ionized in the ionization unit, that is, the impurities have been ionized in the air.
• the present invention relates to a fume hood, which has a fume hood housing with at least one suction gap.
• the extractor hood is characterized in that in the Absaugspalt at least one
• filter unit according to the invention is detachably arranged.
• filter units according to the invention are detachably provided in the extractor, the modular structure of the filter system of the extractor can be realized in a simple manner.
• the filter units can be removed individually from the extractor, for example for cleaning purposes.
• the filter units are arranged in a suction gap. As Absaugspalt the opening of the extractor is called, is sucked through the air in the extractor. For this purpose is in the
• Extractor hood a fan, which can also be referred to as a fan arranged.
• a fan which can also be referred to as a fan arranged.
• at least two filter units are arranged adjacent to one another in the suction gap.
• the size, that is, in particular the width, of the individual filter elements can be kept low and they can therefore be handled easily.
• Filter unit from the suction can therefore be done without much effort.
• so many filter units are juxtaposed in the suction gap
• the filter units each have a housing and this is formed on the side walls by air-impermeable walls, filter units can also be arranged over the corner, that is adjacent so that the respective rear end of a side wall of two filter units abut each other.
• the suction gap extends over at least part of the circumference of the extractor housing and is preferably oriented vertically.
• the filter units according to the invention can be inserted particularly easily from the sides into the suction gap.
• a vertical alignment of the suction gap and thus a horizontal orientation of the filter unit leakage of impurities from the filter unit is not to be feared.
• the suction gap is bounded below by a baffle plate and the at least one filter unit is mounted on the baffle plate.
• Extractor hood formed in which an inlet opening is provided for air.
• the baffle plate can be firmly connected to the extractor housing or be attached to the bottom extendable on this.
• the filter units can in addition to a connection by means of the electrical
• the filter units may, for example, have latching devices which cooperate with further latching devices on the extractor hood and the filter units are thus fastened to the extractor hood.
• a diaphragm is attached to the filter unit or the extractor hood.
• the outwardly facing side of the filter unit is also referred to as the front of the filter unit. Air can enter the filter unit via this side.
• the filter unit is preferably formed at least partially by a protective grid.
• the aperture is preferably provided along the entire length of the Absaugspaltes. At least the cover covers or cover the panels but at least the front sides of the filter units. The panel or panels may be attached to the filter unit or filter units.
• the panels can also on the extractor, for example be attached to the extractor housing and / or an optionally provided baffle plate.
• the diaphragm can be formed by a mesh panel or by curved air guide elements.
• these are preferably aligned so that this air, which flows to the extractor from below to the
• the air guide elements can also be referred to as air guide vanes.
• FIG. 1 shows a schematic perspective view of an embodiment of a fume hood according to the invention
• FIG. 2 shows a schematic perspective view of an embodiment of a filter unit according to the invention
• FIG. 3 shows a schematic perspective view of the electrodes of the separation unit of an embodiment of the filter unit according to the invention
• FIG. 4 shows a schematic perspective view of the electrodes of the separation unit of a further embodiment of the filter unit according to the invention.
• FIGS. 5a and 5b show schematic views of the electrodes of the separation unit of a further embodiment of the filter unit according to the invention.
• FIG. 6 shows a schematic perspective view of part of an embodiment of the extractor hood according to the invention.
• Figure 7 a schematic perspective view of part of another
• FIG. 1 shows an embodiment of a fume extractor according to the invention, which can also be referred to as a fume extractor or extractor hood.
• the extractor 1 in the illustrated embodiment, a fume hood housing 10 and a below, that is in the flow direction in front of the bottom of the
• Extractor housing 10 lying baffle plate 1 1 on. Between the bottom of the extractor housing 10 and the baffle plate 1 1 is a suction gap 12, which can also be referred to as Einsaugspalt formed. In the suction gap 12 a plurality of filter units 2 are introduced. In the view shown are across the width of the
• Extractor 1 two and over the depth of the extractor 1 a filter unit 2 introduced.
• the extractor hood 1 is mounted above a cooker 3 and can be accommodated, for example, in the ceiling (not shown), wherein at least the suction gap 12 lies at least temporarily below the ceiling.
• the modular electrostatic filter system in which the individual filter units 2, which are also referred to as filter modules 2, directly in the suction, which can also be referred to as Einsaugspalt, between the extractor housing 10 and the front baffle plate 1 1 are arranged.
• the filter modules 2 can be used here in any number depending on the extractor. The alignment, distance, arrangement, location of
• Extractor or similar suction device 1 to the stove 3 is free and can be arranged accordingly at any angle and distance from the stove 3.
• FIG. 2 shows a schematic perspective view of an embodiment of a filter unit 2 according to the invention, which may also be referred to as a filter cassette or filter module.
• the electrostatic filter unit 2 consists of a in
• an ionization element 220 is arranged centrally between two negative or grounded counterelectrodes 221, 222.
• the ionization element 220 which can also be referred to as a spray electrode, is under positive electrical high voltage, for example> 6kV (> 6000V).
• the ionization element 220 is arranged parallel to the bottom of the housing 20 of the filter unit 2 in the illustrated embodiment and extends over the entire width of the housing 20.
• the ionization element 220 is disposed at half the height of the housing 20.
• the counter electrodes 221, 222 are at the bottom of the top wall of the housing 20 and at the top of the bottom of the
• the counterelectrodes 221, 222 and the ionization element 220 are located in the front region of the housing 20 behind the protective grid 200 forming the front side of the housing 20.
• Thin wires having a wire diameter of, for example,> 0.1 mm may be considered as an ionization element 220.
• a sawtooth ionization element (not shown) may also be used as the ionization element 220.
• the solid and liquid particles are electrostatically charged in the air stream and in the downstream separation unit 21
• the separation unit 21 consists of plates, so-called precipitation electrodes 21 1 and counterelectrodes 210.
• the plates are arranged parallel to one another and lie in the vertical direction in the embodiment shown in FIG. 2, that is to say perpendicular to the bottom of the housing 20.
• the electrodes 21 1, 210 may also lie in the horizontal, that is to say be aligned parallel to the bottom of the housing 20.
• the plates (collecting electrodes 21 1 and counter electrodes 210) are arranged alternately.
• alternately electrically charged electrodes 21 1, 210 are present in the separation unit 21.
• the positive electrodes 21 1 are under positive electrical high voltage. Between the alternately arranged positive and negative electrodes 21 1, 210 forms an electric field in the filter operation.
• This electric field causes the solid and liquid substances already charged in the ionization unit 22 to be deflected out of the air flow through the electric field and to precipitate or precipitate on the precipitation electrodes 21 1 and counterelectrodes 210, respectively. These solid and liquid substances settle in the form of impurities on the precipitation electrodes 21 1 and counterelectrodes 210.
• FIGS. 5a and 5b illustrate another very effective solution for the
• the separation unit 21 consists of two intermeshing comb profiles 212, 213, which can also be referred to as web profiles or rib profiles, which are connected to each other only at the lateral attachment points by an insulating material or are kept at a distance to each other.
• the individual ribs of the respective comb profiles 212, 213 do not touch each other. If the positive collecting electrode 213 applied to positive electrical voltage and the negative counter electrode 212 to a negative
• Comb profiles 212, 213 an electric field.
• Both the ionization unit 22 and the separation unit 21 are housed in an electrically insulating housing 20 according to FIG.
• the housing 20 includes an engagement guard in the form of a protective grid 200.
• the guard 200 is intended to prevent contact with the ionization and separation articles involved.
• Housing 20 can consist of a single part including the protective grid 200 or of several individual parts (not shown). Furthermore, a drainage channel 201 or a reservoir is implemented in the housing 20 in the embodiment shown in FIG. This gutter 201 serves that to the
• Precipitation electrodes 21 1 and counter electrodes 210 deposited Drain contaminants in the form of solid and liquid substances along the plates and collect in the gutter 201 and the bottom of the housing.
• the individual electrostatic filter units 2 can be removed from the extractor 1 and then in the dishwasher or a similar
• Housing 20 is provided.
• the electrical contacting can also take place on other housing surfaces of a single electrical filter module 2, for example, on the bottom and thus between the filter unit 2 and the baffle plate 1 shown in Figure 1 1.
• FIG. 6 shows a part of the extractor 1 according to an embodiment of the invention. In this embodiment, over the entire gap circumference
• Filter units 2 a diaphragm in the form of a diaphragm grille 13 is provided. This
• Aperture grille 13 serves as an additional protection against interference to the already provided on the housing 20 protective grid 200.
• the aperture serves as an additional measure against touching the electrostatic components.
• aerodynamic flow orientation of the air to the filter unit 2 can be achieved by the grid.
• the geometry or structure of this diaphragm, in particular of the diaphragm grille 13 is dependent on legal requirements as well as design-technical aspects. A VDE test finger must not fit through.
• Air guide elements 14 is formed, used. This guide geometry ensures primarily a homogeneous inflow of air to the filter unit 2 in Absaugspalt 12 and also serves as intervention protection for safety reasons. In view of a homogeneous inflow of air is the need of these air guide elements 14 therein, the resulting vapors from the vertical flow direction in the cooking process to transfer horizontal flow direction. This measure ensures that the vapors and other impurities are homogeneous over the entire
• the air guiding elements 14 are formed by individual blades, which are circular-arc-shaped in a gradient-free and optimal manner.
• the distance between the individual air guiding elements 14 should optimally be kept constant.
• Filter modules are arranged in the immediate intake, in particular the suction of a fume hood. This ensures that downstream, downstream components of a cooker hood remain free of vapor accumulation and other impurities. In contrast to expanded metal fat filters, baffle filters and other grease filters on the market, liquid and solid particles smaller than 1 ⁇ m are filtered out of the stream of compressed air. Even the finest oil smoke can be filtered by means of the filter units according to the invention.
• Odor filters such as activated carbon filters and zeolite filters for odor filtration are thus protected against solid and liquid vapor deposits and other impurities, which increases the life of the odor filter.
• Another advantage of the present invention is that the air filtration can also be done outside the cooking process to increase the indoor air quality.
• the use of the extractor in the function of a room air cleaner outside the cooking process takes place. Ideally, this function occurs at very low intake air flow rates.
• Advantage of this feature is particularly suitable for allergy sufferers.
• Further advantages of the invention are, for example, a very high filter performance at low air flow rates. In contrast to expanded metal fat filters, a very high filtration efficiency can be achieved with the electrostatic filter units according to the invention, even at low volume flows or air flow rates.
• the electrostatic filter units according to the invention have a low pressure loss.
• the removability and cleanability of the filter units are advantageous.

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• 2017
  • 2017-03-13 DE DE102017204059.9A patent/DE102017204059A1/de not_active Withdrawn
• 2018
  • 2018-02-21 CN CN201880018111.1A patent/CN110402351B/zh active Active
  • 2018-02-21 EP EP18707005.7A patent/EP3596396A1/de active Pending
  • 2018-02-21 WO PCT/EP2018/054213 patent/WO2018166764A1/de unknown
  • 2018-02-21 US US16/488,950 patent/US11369975B2/en active Active

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