GB2117665A - Air filter system - Google Patents

Air filter system Download PDF

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Publication number
GB2117665A
GB2117665A GB08307293A GB8307293A GB2117665A GB 2117665 A GB2117665 A GB 2117665A GB 08307293 A GB08307293 A GB 08307293A GB 8307293 A GB8307293 A GB 8307293A GB 2117665 A GB2117665 A GB 2117665A
Authority
GB
United Kingdom
Prior art keywords
housing
filter element
filter
air
suspended matter
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.)
Granted
Application number
GB08307293A
Other versions
GB8307293D0 (en
GB2117665B (en
Inventor
Wolfgang Eckstein
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.)
Draegerwerk AG and Co KGaA
Original Assignee
Draegerwerk AG and Co KGaA
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 Draegerwerk AG and Co KGaA filed Critical Draegerwerk AG and Co KGaA
Publication of GB8307293D0 publication Critical patent/GB8307293D0/en
Publication of GB2117665A publication Critical patent/GB2117665A/en
Application granted granted Critical
Publication of GB2117665B publication Critical patent/GB2117665B/en
Expired 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
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • 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
    • B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
    • B01D46/009—Identification of filter type or position thereof, e.g. by transponders or bar codes
    • 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
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H3/00—Other air-treating devices
    • B60H3/06—Filtering
    • B60H3/0658—Filter elements specially adapted for their arrangement in vehicles
    • 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
    • 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
    • B01D2265/024—Mounting aids
    • B01D2265/026—Mounting aids with means for avoiding false mounting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H3/00—Other air-treating devices
    • B60H3/06—Filtering
    • B60H3/0608—Filter arrangements in the air stream
    • B60H2003/065—Details for holding filter elements in position
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Landscapes

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

Abstract

An air filter system in a vehicle ventilation circuit comprises a housing capable of accommodating either one of two alternative filter elements of identical external size, one being a purely mechanical filter element which removes particles from the air and the other being a combined element which removes both particles and gaseous impurities. The first element has in its peripheral a mean aperture which is engaged by a lever actuating an external indicator, to warn the occupants of the vehicle that only the mechanical filter element is in the housing They will then remove the first element and insert the second if the vehicle is to be exposed to gaseous impurities. Elements are clamped into the housing.

Description

SPECIFICATION A method of providing an air filter for enclosed areas The invention relates to a method of providing an air filter for purifying air in enclosed areas.
Ventilating devices for passenger vehicles, for example, for tanks, ambulances, command oars, or the like, comprise, together with an air conveying device, an air purifying device. The latter is essentially a filter which comprises a suspended matter filter element, for filtering suspended matter from air, with a gas filter element, for filtering undesired gas from air, connected thereafter. The dust particles which are contained in the air are retained in the suspended matter filter element to the finest suspended material, and then the harmful gases are retained in the gas filter element. An essential problem is the space requirement for the filters which are to be arranged inside the vehicle, and the exchange of used-up filter elements, such as the suspended matter filter element or the gas filter element, for new filter elements.
German Patentschrift No. 1281 267 discloses a know filter for a vehicle which contains, in a common housing, in separate chambers, suspended matter filter and gas filter elements. In orderto insert and interchange the separate elements, there are required in the housing an insertion opening, sealable by means of a flap, and also corresponding filter holding devices to hold each filter element respectively. The filter holding devices must brace the filter elements securely even during the roughest journeys of the vehicle. This known filter design still requires an extensive arrangement with the corresponding space requirement.
It would be convenient to have, therefore, a way of providing a filter for purifying air in enclosed areas, with the possibility of interchanging the suspended matter filter and gas filter elements simply and with a reduced space requirement.
In accordance with the present invention there is provided a method of providing an airfilterfor enclosed areas by modifying a filter comprising a housing having an opening and receiving a filter elementforfiltering suspended matter from air, the filter element being clamped in the housing by holding means, the modification comprising removing the filter element from the housing via the opening and replacing it by a second filter element, for removing both suspended matter and undesired gas from air, the second filter element having the same external dimensions as the first-mentioned filter element and being clamped in the housing by the same holding means as clamped the first-mentioned filter element.
The air filter for enclosed areas, for example, in a vehicle ventilating system, may be used under normal environmental conditions as exist, for example, in peacetime, with the suspended matter filter element inserted. The fresh air is then cleansed of the undesirable dust and suspended matter contained in the supply air, which would be harmful to the crew and to the apparatus.
As both the first-mentioned and second filter elements are of the same external dimensions, the suspended matter-gas filter may be simply exchanged for the suspended matter filter in the case of need.
Thus, it is possible to have a substantially smaller filter housing, with only one insertion opening with a flap, and one filter holding device.
According to an embodiment of the invention, the particular design of the suspended matter filter frame together with a switch arrangement in the filter housing ensures that the actual exchange of the filter elements, in case of need, has occurred, as the presence of the suspended matter filter element in the housing may be indicated externally.
For a better understanding of the invention, and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawings in which: Figure 1 shows a cross section of the suspended matter filter; Figure 2 shows a plan view of the suspended matter filter shown in Figure 1; Figure 3 shows a cross-section of the suspended matter-gas filter; Figure 4 shows a cutaway portion of the filter housing; and Figure 5 shows a plan view of the suspended matter filter having been inserted into the housing.
The suspended matter filter 1 of Figure 1 and the combined suspended matter-gas filter 2 of Figure 3 have the same dimensions in respect of length L, width B and height H.
The suspended matter filter f contains a suspended matter filter material 4 tightly inserted in a known manner in a suspended matter filter frame 3.
As shown in Figure 5, the housing 10 is provided with a spring-mounted key lever 6 connected to a switch and indicating apparatus (not shown). The suspended matter filter frame 3 has an opening 5 which engages the key lever 6 when the suspended matter filter 1 has been inserted into the housing.
The opening 5 allows a switching path 5 for the key lever 6. When the switching path 5 has been covered, the key lever triggers a switching process which activates the indicating apparatus to make the suspended matterfilter,which is inserted inthefilter housing 10 for immediate operation, recognizable for the crew.
The combined matter-gas filter 2 comprises, in a known manner in a frame 7, a suspended matter filter material 8 and gas filter material 9 connected thereafter.
The suspended matter filter f or the suspended matter-gas filter 2 is inserted into the filter housing 10, as shown in Figures 4 and 5, and is stretched tightly against a frame 12 by means of mechanical holding devices 11. An insertion opening 13 is sealed in a gas-tight manner by a flap 14. The air to be purified flows through the filter elements in the The drawing(s) originally filed were informal and the print here reproduced is taken from a later filed formal copy.
direction of the arrow 15.

Claims (6)

1. A method of providing an airfilterforenclosed areas by modifying a filter comprising a housing having an opening and receiving a filter element for filtering suspended matter from air, the filter element being clamped in the housing by holding means, the modification comprising removing the filter element from the housing via the opening and replacing it by a second filter element, for removing both suspended matter and undesired gas from air, the second filter element having the same external dimensions as the first-mentioned filter element and being clamped in the housing by the same holding means as clamped the first-mentioned filter element.
2. A method as claimed in Claim 1, wherein the presence of the first-mentioned filter element in the housing is indicated externally.
3. A method as claimed in Claim 2, wherein the first-mentioned filter element has an external frame having an opening therein, there being means disposed at the housing for engaging said opening of the frame, and means controlled by the engaging means for indicating the presence of the fi rst-mentioned filter element in the housing.
4. A method as claimed in Claim 2, wherein said engaging means is a spring-mounted lever disposed on the housing so asto be opposite said opening in the frame when the first-mentioned filter element is present in the housing.
5. A method as claimed in Claim 4, wherein the spring-mounted lever is connected to a switch which actuates said indicating means when the spring mounted lever has traversed a switching path between the housing and the frame.
6. A method of providing an air filter for enclosed areas, substantially as hereinbefore described with reference to the accompanying drawings.
GB08307293A 1982-04-02 1983-03-16 Air filter system Expired GB2117665B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823212289 DE3212289A1 (en) 1982-04-02 1982-04-02 FILTER TO CLEAN THE AIR FOR OUTSIDE ROOMS

Publications (3)

Publication Number Publication Date
GB8307293D0 GB8307293D0 (en) 1983-04-20
GB2117665A true GB2117665A (en) 1983-10-19
GB2117665B GB2117665B (en) 1985-08-07

Family

ID=6160065

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08307293A Expired GB2117665B (en) 1982-04-02 1983-03-16 Air filter system

Country Status (4)

Country Link
DE (1) DE3212289A1 (en)
FR (1) FR2524337B1 (en)
GB (1) GB2117665B (en)
IT (1) IT1198546B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0291072A2 (en) * 1987-05-15 1988-11-17 Drägerwerk Aktiengesellschaft Filter arrangement for keeping ventilated aircraft interiors clean
FR2722452A1 (en) * 1994-07-14 1996-01-19 Daimler Benz Ag HOUSING OF A DUST FILTER, POSSIBLY FOLLOWED BY AN ABSORPTION FILTER IN A MOTOR VEHICLE
FR2722453A1 (en) * 1994-07-14 1996-01-19 Daimler Benz Ag DUST FILTER SURROUNDED BY A FRAME FOR A MOTOR VEHICLE
EP0707989A1 (en) * 1994-10-14 1996-04-24 HS Technik und Design Technische Entwicklungen GmbH Apparatus for cleaning ambient air

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19505723C2 (en) * 1995-02-20 1996-12-12 Daimler Benz Ag Filter insert made of foamed plastic
DE29504132U1 (en) * 1995-03-09 1996-07-25 Liebherr-Werk Bischofshofen Ges.M.B.H., Bischofshofen air conditioner

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB509179A (en) * 1938-05-02 1939-07-12 Frederick Braby And Company Lt Improvements in air filters for gas proof chambers
GB1169285A (en) * 1967-07-29 1969-11-05 Spirax Sarco Ltd Improvements in or relating to Apparatus for Drying or Filtering Fluids

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6944603U (en) * 1969-11-04 1970-03-19 Rheinstahl Hanomag Ag AIR CONDITIONING SYSTEM FOR VEHICLES AND WORK MACHINERY
AT306309B (en) * 1970-11-23 1973-04-10 Krobath Maschf Ferd Device for removing dusty and possibly vapor or gaseous contaminants from an air stream
DE7047672U (en) * 1970-12-24 1974-08-14 Nix H Fresh air filters for the interiors of motor vehicles
DE2224172A1 (en) * 1972-05-18 1973-12-06 Helmut Beeck GAS ABSORBERS FOR VEHICLE VENTILATION SYSTEMS
DE2241647B2 (en) * 1972-08-24 1975-10-09 Lothar Prof. Dr. 6000 Frankfurt Wendt Device for reducing the Co content of the fresh air supplied to the interior of a closed motor vehicle
CA1041914A (en) * 1973-12-17 1978-11-07 William J. Sayer Fluid treating apparatus
DE7638901U1 (en) * 1976-12-11 1977-03-24 Hose, Wilhelm, 3500 Kassel Supply duct for fresh air in motor vehicles
DE2811419A1 (en) * 1978-03-16 1979-09-27 Heinz Hoelter Bonnet mounted fresh air filter for car - is held by magnetic or elastic seals when bonnet is closed down
SE423356B (en) * 1978-04-18 1982-05-03 Saab Scania Ab ARRANGEMENTS FOR CLEANING OF INTRODUCTION AIR TO A VEHICLE'S SPACES
DE2911428A1 (en) * 1979-03-23 1980-10-02 Hoelter Ges Fuer Patenverwertu 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
US4306892A (en) * 1981-02-06 1981-12-22 Tec-Air, Inc. Disposable air freshening packet

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB509179A (en) * 1938-05-02 1939-07-12 Frederick Braby And Company Lt Improvements in air filters for gas proof chambers
GB1169285A (en) * 1967-07-29 1969-11-05 Spirax Sarco Ltd Improvements in or relating to Apparatus for Drying or Filtering Fluids

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0291072A2 (en) * 1987-05-15 1988-11-17 Drägerwerk Aktiengesellschaft Filter arrangement for keeping ventilated aircraft interiors clean
EP0291072A3 (en) * 1987-05-15 1989-05-10 Drägerwerk Aktiengesellschaft Filter arrangement for keeping ventilated aircraft interiors clean
FR2722452A1 (en) * 1994-07-14 1996-01-19 Daimler Benz Ag HOUSING OF A DUST FILTER, POSSIBLY FOLLOWED BY AN ABSORPTION FILTER IN A MOTOR VEHICLE
FR2722453A1 (en) * 1994-07-14 1996-01-19 Daimler Benz Ag DUST FILTER SURROUNDED BY A FRAME FOR A MOTOR VEHICLE
EP0707989A1 (en) * 1994-10-14 1996-04-24 HS Technik und Design Technische Entwicklungen GmbH Apparatus for cleaning ambient air

Also Published As

Publication number Publication date
IT1198546B (en) 1988-12-21
FR2524337A1 (en) 1983-10-07
GB8307293D0 (en) 1983-04-20
IT8309384A0 (en) 1983-04-01
DE3212289A1 (en) 1983-10-13
GB2117665B (en) 1985-08-07
FR2524337B1 (en) 1988-12-09

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930316