DE4027272C1 - Chemisorption filter, esp. for air conditioning systems - includes foamed porous ceramic layer impregnated with alkali, dust capturing prefilter layer and active carbon layer - Google Patents

Chemisorption filter, esp. for air conditioning systems - includes foamed porous ceramic layer impregnated with alkali, dust capturing prefilter layer and active carbon layer

Info

Publication number
DE4027272C1
DE4027272C1 DE4027272A DE4027272A DE4027272C1 DE 4027272 C1 DE4027272 C1 DE 4027272C1 DE 4027272 A DE4027272 A DE 4027272A DE 4027272 A DE4027272 A DE 4027272A DE 4027272 C1 DE4027272 C1 DE 4027272C1
Authority
DE
Germany
Prior art keywords
layer
filter
impregnated
alkali
air conditioning
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.)
Expired - Lifetime
Application number
DE4027272A
Other languages
German (de)
Inventor
Heinz Dipl.-Ing. 4390 Gladbeck De Hoelter
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE4027272A priority Critical patent/DE4027272C1/en
Application granted granted Critical
Publication of DE4027272C1 publication Critical patent/DE4027272C1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2055—Carbonaceous material
    • B01D39/2058—Carbonaceous material the material being particulate
    • B01D39/2062—Bonded, e.g. activated carbon blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2055—Carbonaceous material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/0407—Constructional details of adsorbing systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0464—Impregnants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0618—Non-woven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0654—Support layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0681—The layers being joined by gluing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/25—Coated, impregnated or composite adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/20—Halogens or halogen compounds
    • B01D2257/204—Inorganic halogen compounds
    • B01D2257/2045—Hydrochloric acid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/20—Halogens or halogen compounds
    • B01D2257/204—Inorganic halogen compounds
    • B01D2257/2047—Hydrofluoric acid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/302—Sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/702—Hydrocarbons
    • 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
    • B01D2259/4508—Gas separation or purification devices adapted for specific applications for cleaning air in buildings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Filtering Materials (AREA)

Abstract

Chemisorption filter has a self-supporting body consisting of a foamed porous ceramic layer (2), impregnated with alkali, with a pre-filter layer of dust-capturing fabric (1) on the inflow side and a foamed and adhesively bonded active C layer (3) on the outflow side. A sealing strip (4) holds the layers together and acts as a seal when the filter is inserted in a housing. ADVANTAGE - Readily adaptable, does not require a frame.

Description

Die Erfindung betrifft ein Chemisorptionsfilter, insbe­ sondere für Klimaanlagen, nach dem Oberbegriff des Patent­ anspruchs 1.The invention relates to a chemisorption filter, in particular especially for air conditioning, according to the generic term of the patent claim 1.

Ein derartiges Chemisorptionsfilter ist durch die DE 87 00 521 U1 bekannt.Such a chemisorption filter is due to the DE 87 00 521 U1 known.

Beim Einbau von Filtern in Klimakanäle gibt es immer wieder Schwierigkeiten, durch Rahmen und dergleichen eine ab­ dichtende Filterfläche einzutragen.When installing filters in air conditioning ducts, there are always Difficulties starting with frames and the like enter sealing filter surface.

Es ist durch viele Anmeldungen der Firmengruppe Hölter bekannt, daß sauer-alkalische wechselwirkende Filter eingesetzt werden sollen, um eine bakterizide Wirkung zu erzielen, wobei gleich­ zeitig natürlich auch die Kohlenwasserstoffe über die sauren Bestandteile wie HCL, HF, NOx, SO₂ abgeschieden werden sollen.It is known from many registrations by the Hölter Group, that acid-alkaline interacting filters are used to achieve a bactericidal effect, being the same of course also the hydrocarbons via the acidic components such as HCL, HF, NOx, SO₂ are deposited should.

Der Erfindung liegt die Aufgabe zugrunde, den teuren Aufwand der abdichtenden Filterrahmen nicht notwendig zu machen. Diese Aufgabe wird durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst. Die Erfindung ermöglicht in vorteilhafter Weise, das Filter gleichzeitig als stabiles Traggerüst zu nutzen.The invention has for its object the expensive effort  the sealing filter frame is not necessary. This task is characterized by the characteristics of the Claim 1 solved. The invention enables in advantageously, the filter at the same time as a stable Use scaffolding.

Eine vorteilhafte Ausgestaltung ist im Unteranspruch an­ gegeben.An advantageous embodiment is in the subclaim given.

Im folgenden wird das in der Zeichnung dargestellte Aus­ führungsbeispiel der Erfindung erläutert. In the following the Aus shown in the drawing management example of the invention explained.  

In der Zeichnung ist dargestellt:
mit 1 die Anströmseite, bestehend aus staub­ bindenden Vliesfiltern und dergleichen, mit 2 der selbst stabil in sich stehende Filter­ körper in getränkter Ausführung, vorzugsweise bestehend aus wabenförmigen Keramikstrukturen, die entsprechend der Aufgabenstellung stark alkalisch getränkt sind, z. B. mit einer Soda-Tränkung.The drawing shows:
with 1 the upstream side, consisting of dust-binding fleece filters and the like, with 2 of the self-standing self-standing filter body in an impregnated version, preferably consisting of honeycomb-shaped ceramic structures that are strongly alkaline soaked according to the task, z. B. with a soda soak.

Mit 3 wird angedeutet, daß auf der Abströmseite dann zur Aufnahme von Kohlenwasserstoffen nochmals eine A-Kohleschicht aufgeklebt wird, die in Form von Einzelkörnern auf Matten oder auch als Schaum­ körper aufgeklebt sein kann.With 3 it is indicated that an A-carbon layer is then glued on the outflow side to absorb hydrocarbons, which can be glued in the form of individual grains on mats or as a foam body.

Mit 4 ist ein Dicht-Rahmen bezeichnet, der sowohl den Tragkörper aus keramisch-getränktem Material 2 umschließt als auch die Anströmseite vliesförmiger Körper 1 und auf der Abströmseite die A-Kohle 3. 4 with a sealing frame is referred to, which encloses both the support body made of ceramic-impregnated material 2 and the inflow side non-woven body 1 and the A-charcoal 3 on the outflow side.

Der Dicht-Rahmen bzw. auch Dichtleiste 4 wird in einfachster Art und Weise, so wie zeichnerisch dargestellt, zur Umklammerung der Flächenkörper 1, 2 und 3 genutzt und ist gleichzeitig die Abdichtung innerhalb eines Gehäuses. The sealing frame or sealing strip 4 is used in the simplest way, as shown in the drawing, for gripping the flat bodies 1 , 2 and 3 and is at the same time the seal within a housing.

Durch diese verfahrenstechnische Zusammensetzung von Filterkörpern ist der handwerkliche Betrieb in der Lage, auch auf den Baustellen durch das Zu­ schneiden und Anpassen an die gegebenen Kanäle solche Chemisorptionsfilter anzupassen.Due to this procedural composition of filter bodies is the manual operation in able to access the construction sites cut and adapt to the given channels to adapt such chemisorption filters.

Selbstverständlich ist die Erfindung nicht auf die vorstehend im einzelnen beschriebenen Ausbildungs­ formen und Beschreibungen beschränkt, sondern es sind zahlreiche Abänderungen möglich, ohne jedoch von dem Grundgedanken abzuweichen, daß nicht wie bisher ein rahmenförmiger Körper genommen werden muß, um in Klimakanälen eingebaut zu werden, sondern als selbsttragende Schicht eine poröse Masse genommen wird, die vorzugsweise alkalisch getränkt ist und auf der Anströmseite mit einem staubabscheidenden Vliesfilter, vorzugsweise sauer getränkt, ausgebildet ist, und auf der Abströmseite mit 3 eine A-Kohlebeschichtung aufweist, vorzugs­ weise in geschäumter Ausführung, wobei die An­ strömseite 1 und die A-Kohle-Abströmseite 3 mit dem stabilisierenden, porösen Körper 2 vorzugsweise aus getränkter Keramik hergestellt in Punktklebetechnik verbunden ist und mit der Umhüllung 4 klammer­ technisch umschlossen ist bei gleichzeitiger Ab­ dichtwirkung der Umhüllung 4.Of course, the invention is not limited to the forms and descriptions described in detail above, but numerous modifications are possible without, however, deviating from the basic idea that a frame-shaped body does not have to be used as before to be installed in air-conditioning ducts, but instead a porous mass is used as a self-supporting layer removed, the impregnated preferably alkaline, and is preferably impregnated acid on the upstream side with a dust-collecting fleece filter is formed, and has on the outflow side 3 an activated carbon coating, preferably, in the foamed embodiments, the On the flow side 1 and the A-carbon outflow side 3 is connected to the stabilizing, porous body 2, preferably made of impregnated ceramic, using point adhesive technology and is technically enclosed with the sheathing 4 with a simultaneous sealing effect from the sheathing 4 .

Claims (2)

1. Chemisorptionsfilter, insbesondere für Klimaanlagen, mit einem selbsttragenden Stützkörpersystem für mehrere, in Strömungsrichtung hintereinander angeordnete Filterschichten, worunter sich eine Vorfilterschicht und eine Aktivkohle­ schicht befinden, und mit einer Dichtleiste zum abdichtenden Einschub in einen Luftkanal, dadurch gekennzeichnet, daß das Stützkörpersystem aus einer porösen, geschäumten, keramischen Schicht 2 besteht, die alkalisch getränkt ist und an die sich auf der Anströmseite die Vorfilterschicht als ein Vlies (1) und auf der Abströmseite die Aktivkohle­ schicht als eine geschäumte und verklebte Schicht (3) an­ lagert, und daß die Dichtleiste (4) die Filterschichten (1, 2, 3) umklammert.1.Chemisorption filter, in particular for air conditioning systems, with a self-supporting support body system for several filter layers arranged one behind the other in the direction of flow, including a pre-filter layer and an activated carbon layer, and with a sealing strip for sealing insertion into an air duct, characterized in that the support body system consists of one Porous, foamed, ceramic layer 2, which is soaked in alkaline and to which on the upstream side the pre-filter layer as a fleece ( 1 ) and on the downstream side the activated carbon layer as a foamed and bonded layer ( 3 ), and that the Sealing strip ( 4 ) clasps the filter layers ( 1 , 2 , 3 ). 2. Chemisorptionsfilter nach Anspruch 1, dadurch gekenn­ zeichnet, daß die Vorfilterschicht in Form des Vlieses (1) sauer getränkt ist.2. Chemisorption filter according to claim 1, characterized in that the pre-filter layer in the form of the fleece ( 1 ) is impregnated with acid.
DE4027272A 1990-08-29 1990-08-29 Chemisorption filter, esp. for air conditioning systems - includes foamed porous ceramic layer impregnated with alkali, dust capturing prefilter layer and active carbon layer Expired - Lifetime DE4027272C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4027272A DE4027272C1 (en) 1990-08-29 1990-08-29 Chemisorption filter, esp. for air conditioning systems - includes foamed porous ceramic layer impregnated with alkali, dust capturing prefilter layer and active carbon layer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4027272A DE4027272C1 (en) 1990-08-29 1990-08-29 Chemisorption filter, esp. for air conditioning systems - includes foamed porous ceramic layer impregnated with alkali, dust capturing prefilter layer and active carbon layer

Publications (1)

Publication Number Publication Date
DE4027272C1 true DE4027272C1 (en) 1992-02-27

Family

ID=6413126

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4027272A Expired - Lifetime DE4027272C1 (en) 1990-08-29 1990-08-29 Chemisorption filter, esp. for air conditioning systems - includes foamed porous ceramic layer impregnated with alkali, dust capturing prefilter layer and active carbon layer

Country Status (1)

Country Link
DE (1) DE4027272C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003002234A1 (en) * 2001-06-27 2003-01-09 Mahle Filtersysteme Gmbh Method for sealing the cut edges of web-shaped filter material

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8700521U1 (en) * 1987-01-12 1987-05-21 Schlimme, Wolfram, Dr.Ing. Dipl.-Ing. Dipl.-Wirtsch.-Ing., 8000 München Interior air filters for motor vehicles

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8700521U1 (en) * 1987-01-12 1987-05-21 Schlimme, Wolfram, Dr.Ing. Dipl.-Ing. Dipl.-Wirtsch.-Ing., 8000 München Interior air filters for motor vehicles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003002234A1 (en) * 2001-06-27 2003-01-09 Mahle Filtersysteme Gmbh Method for sealing the cut edges of web-shaped filter material

Similar Documents

Publication Publication Date Title
DE69012880T2 (en) Sorption filter device.
EP0100907B2 (en) Air-cleaning apparatus
EP0211177B1 (en) Filter element in sheet form
DE1279433B (en) Plate-shaped air filter element and process for its manufacture
DE102018108815A1 (en) Roll Band Air Filter
EP0317593B1 (en) Process, filter and device for supplying high-quality breathing air
DE2911428A1 (en) Filter for air supply to lorry cabs - having set of chemically absorbent layers for different contaminants held apart by felt or other woven or nonwoven material
DE4329737C1 (en) Filter arrangement consisting of at least two filters which can be flowed through in succession
EP1618938A1 (en) Filter arrangement
DE202008009005U1 (en) Gas filter and air purifier
DE4027272C1 (en) Chemisorption filter, esp. for air conditioning systems - includes foamed porous ceramic layer impregnated with alkali, dust capturing prefilter layer and active carbon layer
DE4413606A1 (en) Composite filter for motor vehicles removes acid gases and particles from the air
DE102010050222A1 (en) Cabin air filter, filter holder and filter assembly
DE3042455A1 (en) Air supply purificn. esp. for vehicle cabin - using sorbent and catalyst system of soda lime, hopcalite and charcoal
DE3640953C2 (en) Chemisorption filter for filtering air
WO1998002228A1 (en) Particle filter in the form of a pleated nonwoven layer
DE3331864A1 (en) Process to give air-conditioned clean air for, preferably, living rooms or commercially-used rooms
EP3167949A1 (en) Mobile cleaning device and method for cleaning room air and/or fresh air
EP0752901B1 (en) Method of manufacturing flexible sheet filter material designed to keep out toxic substances, and use of the material
WO2001051308A1 (en) Climatized upholstery system, especially for a vehicle seat
DE3803613C2 (en)
EP1481718A1 (en) Filter arrangement
DE20306250U1 (en) Filter unit, used e.g. in air conditioners, comprises filter element containing granular spherical activated charcoal, and filter element containing combination of granular spherical activated charcoal and activated charcoal fibers
DE9012356U1 (en) Filters for installation in air conditioning ducts, etc.
DE2212687A1 (en) VENTILATION DEVICE FOR THE INTERIORS OF VEHICLES

Legal Events

Date Code Title Description
8100 Publication of patent without earlier publication of application
D1 Grant (no unexamined application published) patent law 81
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee