EP4259303A1 - Dispositif de purification d'air ambiant et utilisation d'un élément filtrant dans un dispositif de purification d'air ambiant - Google Patents

Dispositif de purification d'air ambiant et utilisation d'un élément filtrant dans un dispositif de purification d'air ambiant

Info

Publication number
EP4259303A1
EP4259303A1 EP21840996.9A EP21840996A EP4259303A1 EP 4259303 A1 EP4259303 A1 EP 4259303A1 EP 21840996 A EP21840996 A EP 21840996A EP 4259303 A1 EP4259303 A1 EP 4259303A1
Authority
EP
European Patent Office
Prior art keywords
filter element
filter
ambient air
housing
main
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.)
Pending
Application number
EP21840996.9A
Other languages
German (de)
English (en)
Inventor
Jens Gusek
Christoph Schulz
Marc HITTINGER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mann and Hummel Life Sciences and Environment Holding Singapore Pte Ltd
Original Assignee
Mann and Hummel Life Sciences and Environment Holding Singapore Pte Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mann and Hummel Life Sciences and Environment Holding Singapore Pte Ltd filed Critical Mann and Hummel Life Sciences and Environment Holding Singapore Pte Ltd
Publication of EP4259303A1 publication Critical patent/EP4259303A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0005—Mounting of filtering elements within casings, housings or frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
    • B01D46/121—V-type arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0004—Details of removable closures, lids, caps or filter heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/28—Particle separators, e.g. dust precipitators, using filter brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
    • B01D46/32—Particle separators, e.g. dust precipitators, using loose filtering material the material moving during filtering
    • B01D46/36—Particle separators, e.g. dust precipitators, using loose filtering material the material moving during filtering as a substantially horizontal layer, e.g. on rotary tables, drums, conveyor belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/88—Replacing filter elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28—Arrangement or mounting of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/15—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/80—Self-contained air purifiers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/95—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying specially adapted for specific purposes
    • F24F8/99—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying specially adapted for specific purposes for treating air sourced from urban areas, e.g. from streets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2221/00—Applications of separation devices
    • B01D2221/16—Separation devices for cleaning ambient air, e.g. air along roads or air in cities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/45—Gas separation or purification devices adapted for specific applications
    • B01D2259/455—Gas separation or purification devices adapted for specific applications for transportable use
    • B01D2259/4558—Gas separation or purification devices adapted for specific applications for transportable use for being employed as mobile cleaners for ambient air, i.e. the earth's atmosphere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2265/00—Casings, housings or mounting for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2265/02—Non-permanent measures for connecting different parts of the filter
    • B01D2265/028—Snap, latch or clip connecting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2267/00—Multiple filter elements specially adapted for separating dispersed particles from gases or vapours
    • B01D2267/30—Same type of filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2267/00—Multiple filter elements specially adapted for separating dispersed particles from gases or vapours
    • B01D2267/40—Different types of filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2267/00—Multiple filter elements specially adapted for separating dispersed particles from gases or vapours
    • B01D2267/70—Horizontal arrangement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2271/00—Sealings for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2271/02—Gaskets, sealings
    • B01D2271/022—Axial sealings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2273/30—Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/40—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for cleaning of environmental air, e.g. by filters installed on vehicles or on streets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F24F2013/205—Mounting a ventilator fan therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/15—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
    • F24F8/158—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means using active carbon

Definitions

  • the invention relates to an ambient air purification device, in particular for stationary ambient air filtration in the exterior and/or interior, and the use of a filter element in an ambient air purification device.
  • ambient air cleaners for the separation of air pollutants.
  • Such devices usually have a flow-through housing with an inlet and an outlet, in each of which one or more blowers and a filter are arranged, with the filters being classic filter elements made of porous and air-permeable filter media and/or electrostatic precipitator can act.
  • the ambient air cleaners are advantageously set up in places with an increased concentration of pollutants, such as outdoors as well as indoors, tunnels, underground train stations, bus stops, etc.
  • Generic ambient air cleaners are known, for example, from FR 2787175 A or US 2019 160 411 A.
  • HEPA filters are often combined with a pre-filter upstream in the direction of flow, which has a coarser filter fineness than the HEPA filter.
  • the present invention is based on the object of providing an ambient air cleaning device, in particular an interior air cleaner, with at least two filter elements, in which both filter elements, in particular HEPA filter element and pre-filter element, can be replaced independently of one another and which has as few parts as possible .
  • the object is to provide a use of a filter element in an ambient air purification device that rules out incorrect assembly of the filter element.
  • the ambient air purification device is designed in particular for stationary ambient air filtration in the interior and/or exterior. It can be designed as a so-called. Outside air cleaner or inside air cleaner. In the case of an embodiment as an outdoor air purifier, this can be intended to be set up in the public outdoor space, for example at inner-city pollutant hotspots, for example in the immediate vicinity of a road and/or in a tunnel. In the interior, the ambient air cleaning device can be used wherever there is a need for clean room air, such as in offices, workshops, medical facilities and/or private rooms.
  • the ambient air cleaning device has a housing that has at least one air inlet and at least one air outlet. At least one air flow generating device is arranged in the housing, by means of which an air flow can be generated from the air inlet to the air outlet, with a filter device also being present in the housing in terms of flow between the air inlet and the air outlet, which has a main filter element with a plurality of filter medium bodies arranged in a V-shape relative to one another and a pre-filter element upstream of the main filter element in terms of flow and having at least one filter medium body. That The main filter element and the pre-filter element each have a peripheral frame device.
  • the housing has a filter receiving area in which the filter device is received and sealed with respect to the housing.
  • the filter receiving area has a protruding circumferential contact shoulder for sealing contact with a seal of the filter device.
  • a clamping force generating device is also arranged in the housing and is designed to exert an axially directed clamping force on the frame device of the main filter element in an assembled state. In the installed state, the main filter element rests at its upstream end with its frame device on the frame device of the pre-filter element, the clamping force thereby being transferrable to the frame device of the pre-filter element.
  • the frame device of the pre-filter element can be pressed sealingly against the contact shoulder by the clamping force with the interposition of a first circumferential seal.
  • the clamping force is therefore introduced indirectly into the frame device of the pre-filter element, i.e. with the interposition of the frame device of the main filter element.
  • the main filter element does not have its own sealing point in relation to the housing, but instead seals off indirectly via the frame device of the pre-filter element in relation to the housing.
  • the number of housing sealing points is advantageously reduced, which reduces the risk of leaks and allows a coarser tolerance in the axial direction.
  • the main filter element does not have its own housing sealing point, the complexity and number of parts of the system is reduced.
  • Protruding is understood to mean, in relation to the contact shoulder, in particular a radial protrusion, namely in relation to a flow cross section spanned by the frame device of the pre-filter element.
  • An “axially directed clamping force” can also have other force components, as can result from a force application surface of the clamping force generating device that is at an angle to the axial line.
  • An “axially directed clamping force” is therefore a clamping force that has at least an axial component.
  • a frame device is understood to mean a mechanically stable, encircling element which surrounds the filter medium body or bodies of the filter elements and against which the filter medium bodies are sealed.
  • the frame element is set up to enable a separation between an upstream dirty side and a downstream clean side of the filter elements.
  • the main filter element and the pre-filter element are designed separately from one another and can be removed separately from the filter receiving area. This has the advantage that the pre-filter element can be changed without changing the main filter element, which is important in practice since the service life of the pre-filter element is two to three times longer than that of the main filter element.
  • the contact shoulder can be provided, for example, as a housing area with a reduced cross-section or in the form of a radially circumferential rib that protrudes into the filter receiving area.
  • the contact shoulder provides an axial sealing surface and preferably has an extent which is oriented in the normal direction with respect to a main inflow direction (axially).
  • the clamping force generating device can have a clamping rail which can be pressed onto the frame device of the main filter element by a clamping screw.
  • the clamping force generating device can have other means for generating the clamping force, such as a toggle lever mechanism or a quick-action clamping device.
  • the housing can have a parallelepipedal, in particular cubic, shape, for example. However, it can also have a different shape, for example with a circular or elliptical base.
  • the housing can have at least one grille which at least partially spans the air inlet and/or the air outlet.
  • the grille provides tamper protection and keeps out debris that could otherwise damage the airflow generating device
  • the device for generating the air flow can be an axial, diagonal or centrifugal fan, which can be driven by an electric motor.
  • Other drive types that appear suitable to those skilled in the art are possible.
  • the filter device can preferably include an electrical connection.
  • the electrical connection can preferably be made at the low-voltage level.
  • the filter device can also have devices that enable connection at the medium-voltage level.
  • the ambient air cleaning device can have a control device, in particular an electronic control device, with which operating times and strategies can be controlled.
  • the control device is to be coupled to the electric motor in a manner that appears suitable to a person skilled in the art.
  • This V-shaped filter element configuration of the main filter element has proven to be particularly advantageous for use in a stationary ambient air cleaning device, since a particularly large filter surface can be accommodated with a small inflow surface cross section.
  • Directional information such as axial and radial, is to be understood here in relation to a main inflow direction, which is defined by the direction of a normal vector of a plane of the pre-filter element or the plane of the protruding housing-side contact shoulder.
  • the frame of the main filter element can be sealed directly from the housing via the frame of the pre-filter element and the frame of the main filter element does not have its own sealing point with respect to the housing.
  • both the first and the second circumferential seal can be present on the pre-filter element, in particular on its frame device.
  • the first and the second seal are connected to the pre-filter element, in particular non-detachably connected. This has the advantage that new seals are used each time the pre-filter element is replaced, which in practice has to be replaced more frequently than the main filter element. This ensures a permanently reliable sealing of the filter device in relation to the housing.
  • the first and/or second circumferential seal can be present on a surface of a frame device which is directed normally with respect to a main inflow direction. This allows for a reliable axial seal without the application of shear forces to the seal.
  • the housing can comprise at least one service door through which an interior of the housing is accessible, with the filter receiving area of the housing being accessible in particular through the service door.
  • a longitudinal extent of the plurality of filter medium bodies of the main filter element arranged in a V-shape relative to one another can run in a horizontal direction in a predetermined operating orientation of the ambient air purification device.
  • a different arrangement of the filter medium bodies is also possible, such as an orientation of the longitudinal extensions of the filter medium bodies in the vertical direction, i.e. upright.
  • a longitudinal extension is understood to mean an extension direction of the filter medium body, which coincides with the spatial direction in which it has its greatest dimension.
  • At least one of the filter media bodies of the pre-filter element and/or of the main filter element can comprise a bellows made of a pleated filter medium.
  • both the pre-filter element and the main filter element comprise at least one filter medium body with a bellows made of a pleated filter medium.
  • the housing comprises opposite front and rear walls, side walls and top and bottom walls.
  • the air outlet is in particular in a front or rear wall and the air inlet in a side wall.
  • an air flow between the air inlet and the air outlet can experience at least one change of direction in its main flow direction, in particular by 90°.
  • At least one partition can be arranged in the housing, which partition separates the filter receiving area from a fan receiving area.
  • the air flow generating device can be held on the partition and there can be a fluidic connection between the filter receiving area and the blower receiving area. Accommodating the air flow generating device, in particular a motor and/or impeller of the air flow generating device, in a separate fan accommodation area has further acoustic advantages.
  • the housing can have at least one acoustic damping element.
  • the housing is preferably lined on the inside with an acoustic material, in particular an insulating foam or insulating fleece, in the area of the fan receiving area. This measure can significantly reduce the operating noise level.
  • the filter receiving area provides a clean air area, which is separated from an outside raw air area by the sealing contact of the first circumferential seal between the pre-filter element and the contact shoulder of the housing.
  • the frame device of at least the pre-filter element or the main filter element, but preferably both, can consist of or have a pressure-resistant material, preferably a plastic or steel material.
  • the frame device is preferably connected in a fluid-tight manner to the respective filter medium body, in particular to the front edges of the folds of the bellows and to the top edges of the bellows.
  • the frame device can in particular have a hard plastic component injection-molded onto the bellows or be connected to the filter medium body in some other way, for example glued or foamed on.
  • the frame device of the main filter element can have a radially projecting circumferential collar, on which the clamping force generating device acts in the assembled state.
  • At least one of the filter elements can have at least one particle filter medium, preferably a HEPA filter medium, and/or have at least one adsorbent, in particular an activated carbon and/or a zeolite.
  • the filter elements or their respective frame devices can have a polygonal, in particular cuboid, shape.
  • the main filter element preferably comprises the HEPA filter medium and the pre-filter element comprises a “coarser” particle filter medium.
  • the particle filter medium can comprise a spunbonded nonwoven material, in particular a polyethylene terephthalate or polypropylene spunbonded nonwoven material, and/or a needled nonwoven material, in particular a polypropylene or polyethylene terephthalate needled nonwoven, and/or a meltblown layer and/or a multicomponent fiber material, in particular with bicomponent fibers with a polyp propylene/polyacrylonitrile component.
  • the HEPA filter medium comprises at least one membrane layer made of an expanded PTFE.
  • the HEPA filter medium is preferably certified according to ISO 29463 and EN 1822 and meets the requirements of class H13 or H14.
  • the adsorbent can be used to adsorb predetermined noxious gases, such as NO x , CO, NH3, and/or odors.
  • the adsorbent can in particular be part of the filter medium and be present therein as a bed in the form of one or more layer(s).
  • the pre-filter element preferably has a filter medium with an adsorbent.
  • the filter medium of at least one of the filter elements can have at least one further layer which is designed as an antimicrobial and/or antiallergenic layer which has at least one antimicrobial and/or antiallergenic substance. This measure can improve the ambient air quality from another important aspect.
  • the antimicrobial, in particular antibacterial or biocidal, substance protects the filter medium or parts or layers thereof from microorganisms such as fungi or fungal spores, in particular mold or mold spores, bacteria or algae, which are in a living, reproductive or propagating form may be present, is infested or such microorganisms spread in the filter medium or grow through it.
  • the anti-allergenic substance can, for example, render extremely fine pollen particles and other allergens, which cannot always be completely retained by the filter medium, at least partially harmless to the human body or its immune system.
  • Zinc pyrithione in particular can serve as an antimicrobial substance.
  • octa-isothiazobn can be used as an antimicrobial agent.
  • the second filter layer may also contain antimicrobial substances based on nanosilver.
  • the second filter layer can also contain antimicrobial metals and metal compounds, in particular silver, copper and aluminum compounds and/or 2-bromo-2-nitropropane-1,3-diol, other isothiazoline compounds, benzoic acid and its derivatives, benzalkonium halides, water-soluble coenzymes, oil-soluble coenzymes, plant extracts , Antibiotics, biocidal metals, aliphatic and/or aromatic fatty acids and/or quaternary surfactants as antimicrobial substances.
  • antimicrobial metals and metal compounds in particular silver, copper and aluminum compounds and/or 2-bromo-2-nitropropane-1,3-diol, other isothiazoline compounds, benzoic acid and its derivatives, benzalkonium halides, water-soluble coenzymes, oil-soluble coenzymes, plant extracts , Antibiotics, biocidal metals, aliphatic and/or aromatic fatty acids and/or quaternary surfactants as antimicrobial substances.
  • Polyphenols such as catechins, tannide or flavonoids, are particularly suitable as antiallergenic substances.
  • caffeic, gallic, ellaginic, tannic acid, cyanidin, procyanidin, proanthocyanidins, rutin, quercitin, resveratol can be used.
  • Polyphenols preferentially bind anti-allergenic substances, so that the allergic effect can be reduced. Allergen pollen, for example, is denatured by polyphenols.
  • the anti-allergenic substance may also include anti-allergenic enzymes. Antiallergic enzymes split preferentially allergenic proteins into smaller, less harmful components.
  • the filter device is arranged on the suction side with respect to the air flow generating device. This reduces the operating noise level and allows for a less complex sealing of the housing, as there is a relative negative pressure compared to the surroundings in a large part of the housing.
  • the main filter element has at least four, preferably at least six, filter medium bodies arranged in a V-shape relative to one another. This is also known as a V-cell configuration.
  • the filter area of an individual filter medium body in the form of a folded filter bellows can be 0.5 to 3.5 m 2 , preferably 1.7 to 2.7 m 2 , using a non-HEPA particle filter medium.
  • the filter surface per filter medium body can even be 4-7 m 2 since a HEPA filter medium is usually significantly thinner than other filter media.
  • the dimensions of the individual filter medium bodies of the V-cell element of the main filter element can be designed as follows, for example
  • Pleat height 20 - 50 mm
  • the ambient air cleaning device according to the invention can have a third filter element, which is downstream of the main filter element in terms of flow.
  • the third filter element has at least one adsorbent, in particular an activated carbon.
  • the third filter element can be located upstream or downstream of the air flow generating device.
  • the adsorbent of the third filter element may be an adsorbent other than an adsorbent provided in the pre-filter element.
  • certain target gas spectra can advantageously be optimally covered.
  • the third filter element has, in particular, a filter medium folded to form a filter bellows and a frame device surrounding the filter bellows. It can be arranged downstream of the main filter element in a manner that appears suitable to a person skilled in the art.
  • a further aspect of the invention relates to the use of a filter element as a pre-filter element and as a main filter element in an ambient air purification device according to the invention.
  • FIG. 1 isometric view of the ambient air purification device according to the invention.
  • 3-7 isometric representations of the maintenance of the ambient air purification device according to the invention.
  • the ambient air purification device 10 according to the invention and shown in an isometric external view in FIG. 1 has a housing 1 which has an air inlet 15 and an air outlet 14 .
  • the air inlet 15 and the air outlet 14 are each spanned by a grid 16, which protects against access to the interior of the housing 1 and keeps other foreign bodies away.
  • the housing 1 has an essentially cuboid shape and has side walls 12 and an upper and lower wall 11 each.
  • the housing 10 has rounded edges that minimize the risk of injury, which is particularly advantageous when the device according to the invention is installed indoors. Edge roundings are provided on the short edges of the box shape.
  • the air inlet 15 is provided in a side wall 12 and the air outlet 14 in a front wall.
  • the Housing 1 Flowwise between the air inlet 15 and the air outlet 14 is in the Housing 1 has a filter device 2 and an air flow generating device 3 arranged (see FIGS. 2 and 3), which is designed to generate an air flow from the air inlet 15 through the filter device 2 to the air outlet 14 .
  • the air flow generating device 3 of the ambient air purification device 10 shown is a radial fan that is driven by an electric motor.
  • the ambient air purification device 10 according to the invention also has a service door 13 which can be opened for servicing.
  • the air flow generating device 3 has a fan (flow machine) and an electric motor that drives the fan.
  • the fan can be designed by a person skilled in the art as a function of the system characteristic, with known designs such as axial, diagonal and radial fans being suitable in particular.
  • the ambient air purification device 10 has a control device 4.
  • the control device 4 can in particular be an electronic control device with which the operating times and strategies can be controlled.
  • the control device 4 is to be coupled to the electric motor in a manner that appears suitable to a person skilled in the art.
  • the electric motor of the air flow generating device 3 can also be actuated by a simple switch.
  • FIGS. 3 to 7 The service process for replacing the filter elements 2 and further details of the ambient air cleaning device 10 are shown in detail in FIGS. 3 to 7 with the service door 13 open.
  • the service door 13 is hinged and in the closed state is sealed by a seal 132 surrounding the service opening of the housing 1. In its closed state, the service door 13 can be locked in relation to a housing body via locking means 131 and is opened during the service process.
  • the housing 1 has a filter receiving area 17 in which a filter device 2 comprising a main filter element 21 and a pre-filter element 22 (see FIGS. 5 to 9) is arranged.
  • the main filter element 21 has a plurality of filter medium bodies 211 arranged in a V-shape relative to one another, here six pieces.
  • the filter medium bodies 211 can in particular be filter bellows made from a folded filter medium.
  • the main filter element 21 has in particular a HEPA filter medium.
  • the attachment of the filter elements 21 , 22 in the filter receiving area 17 of the housing 1 can be seen in FIG. 4 .
  • the main filter element 21 is braced in the housing 1 via a clamping force generating device 5 which exerts an axial clamping force on its frame device 212 (see FIG. 5).
  • the clamping force generating device 5 has a clamping rail 51 which can exert a clamping force on the frame device 212 of the main filter element 21 via one or more clamping screws 52 .
  • 4 shows the assembled state, ie a state with mounted/tensioned filter elements 21, 22.
  • the clamping screws 52 are loosened and the clamping rail 51 can be radially displaced by means of an L-shaped cutout in the clamping rail 51 that is assigned to the clamping screws 52 and through which the clamping screws 52 are guided, see above that the clamping engagement of the clamping rail 51 on the frame device 212 of the main filter element 21 is released and this can be removed from the housing 1, which can be seen in FIG.
  • the end of the main filter element 21 on the right in the drawing is its upstream end and the end on the left in the drawing is its downstream end.
  • the main filter element 21 is preceded by a pre-filter element 22 which also includes a filter bellows made from a folded filter medium and serves to protect the main filter element 21 and prevents the main filter element 21 from being excessively loaded prematurely.
  • a pre-filter element 22 which also includes a filter bellows made from a folded filter medium and serves to protect the main filter element 21 and prevents the main filter element 21 from being excessively loaded prematurely.
  • the pre-filter element 22 has a frame device 222 which surrounds the filter medium body 221 all around.
  • a second circumferential seal 223 is provided on a downstream side of the frame device 222 (on the left in the drawing), by means of which the frame device 222 of the pre-filter element 22 is sealed off from the frame device 212 of the main filter element 21 in the assembled state.
  • the sealing effect between the frame device 222 of the pre-filter element 22 and the frame device 212 of the main filter element 21 takes place axially.
  • Fig. 8 and 9 the interface of the pre-22 and main filter element 21 is now shown in relation to the housing 1 in longitudinal sectional views, which show the assembled state of the ambient air cleaning device 10.
  • Fig. 9 shows detail A from Fig. 8.
  • the main filter element 21 does not have its "own” seal with respect to the housing 1, but is sealed indirectly via the first circumferential seal 224, which is present between the frame device 222 of the pre-filter element 22 and the protruding contact shoulder 171 of the housing 1.
  • the frame device 222 of the pre-filter element 22 rests on its end facing away from the main filter element 21, i.e. with its upstream side (on the right in the drawing), with the interposition of the first peripheral seal 224 on a protruding peripheral contact shoulder 171 of the filter receiving area 17 of the housing 1 and is the clamping force is pressed against the contact shoulder 171.
  • the actual sealing contact of the filter device 2 occurs in the axial sealing contact between the first circumferential seal 224 and the contact shoulder 171.
  • both the first circumferential seal 224 and the second circumferential seal 223 are arranged on the pre-filter element 22 .
  • the first 224 and/or second seal 223 are not connected to the pre-filter element 22 and are provided loosely.
  • the frame device 212 of the main filter element 21 has a circumferential collar 213 which protrudes radially and provides a force introduction surface for the clamping force generating device 5 .
  • the indirect sealing of the main filter element 21 with respect to the housing 1 according to the invention has the advantage that the main filter element 21 does not require its own sealing point with respect to the housing 21 . As a result, the number of sealing points on the housing is reduced, which reduces the risk of leaks and allows for greater tolerances in the axial direction.
  • the pre-filter element 22 can be changed without changing the main filter element 21 , which is relevant in practice since the service life of the pre-filter element 22 is two to three times longer than that of the main filter element 21 .
  • the frame devices 212, 222 of the filter elements 21, 22 must have a sufficiently high pressure rigidity so that the forces required due to the sealing reaction forces can be transmitted. without failure of the frame assemblies 212, 222 occurring. Therefore, the frame devices 212, 222 are preferably made of a (hard) plastic or steel material.
  • the partition wall has a through-opening that enables fluidic connection of the filter receiving area 17 with the blower receiving area 19 and supports the air flow generating device 3, which is arranged in the through-opening.
  • the fan receiving area 19 is lined with an acoustic insulating material 191, which significantly reduces the operating noise level of the ambient air cleaning device 10 .

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

La présente invention concerne un dispositif de purification d'air ambiant (10) doté d'un boîtier (1). Au moins un dispositif de filtration (2) est disposé dans le boîtier (1), le ou les dispositifs de filtration (2) comprenant un élément filtrant principal (21) et un élément préfiltrant (22) qui est monté en amont de l'élément filtrant principal (21). La zone de réception de filtre (17) présente un épaulement de palier périphérique en saillie (171) destiné à venir en appui de manière étanche contre un joint d'étanchéité (224) du dispositif de filtration (2). Un dispositif de génération de force de serrage (5) est disposé dans le boîtier (1). Grâce à ce dispositif (5), une force de serrage dirigée axialement peut être exercée sur le dispositif de cadre (212) de l'élément filtrant principal (21), le dispositif de cadre (222) de l'élément préfiltrant (22) pouvant être pressé de manière étanche sur l'épaulement de palier (171) par l'intermédiaire de la force de serrage, un premier joint d'étanchéité périphérique (224) étant positionné entre eux. L'invention concerne en outre l'utilisation d'un élément filtrant dans chaque cas comme élément préfiltrant (22) et comme élément filtrant principal (21).
EP21840996.9A 2020-12-09 2021-12-08 Dispositif de purification d'air ambiant et utilisation d'un élément filtrant dans un dispositif de purification d'air ambiant Pending EP4259303A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020132834.6A DE102020132834A1 (de) 2020-12-09 2020-12-09 Umgebungsluftreinigungsvorrichtung und Verwendung eines Filterelements in einer Umgebungsluftreinigungsvorrichtung
PCT/IB2021/061439 WO2022123453A1 (fr) 2020-12-09 2021-12-08 Dispositif de purification d'air ambiant et utilisation d'un élément filtrant dans un dispositif de purification d'air ambiant

Publications (1)

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EP4259303A1 true EP4259303A1 (fr) 2023-10-18

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EP21840996.9A Pending EP4259303A1 (fr) 2020-12-09 2021-12-08 Dispositif de purification d'air ambiant et utilisation d'un élément filtrant dans un dispositif de purification d'air ambiant

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US (1) US20230321580A1 (fr)
EP (1) EP4259303A1 (fr)
KR (1) KR20230116787A (fr)
CN (1) CN116600873A (fr)
DE (1) DE102020132834A1 (fr)
WO (1) WO2022123453A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2787175B1 (fr) 1998-12-15 2001-03-09 Marc Astorga Dispositif d'aspiration et de filtration de gaz d'echappement
RU2543889C2 (ru) * 2010-06-22 2015-03-10 Кларкор Эр Филтрейшн Продактс, Инк. Система фильтрации воздуха в сооружениях для стойлового содержания животных с помощью панельного воздушного фильтра с зигзагообразным расположением панелей
KR102527659B1 (ko) 2017-11-27 2023-05-03 삼성전자주식회사 공기청정기
DE102018124610B4 (de) * 2018-10-05 2022-03-03 Mann+Hummel Gmbh Stationäre Umgebungsluftreinigungsvorrichtung und Umgebungsluftreinigungsvorrichtungs-Anordnung
DE102018129286B3 (de) 2018-11-21 2019-08-14 Mann+Hummel Gmbh Stationäre Umgebungsluftreinigungsvorrichtung und Betriebsverfahren

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KR20230116787A (ko) 2023-08-04
DE102020132834A1 (de) 2022-06-09
CN116600873A (zh) 2023-08-15
WO2022123453A1 (fr) 2022-06-16
US20230321580A1 (en) 2023-10-12

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