WO1996023668A1 - Systeme de filtrage a echange automatique des filtres pour vehicules a moteur - Google Patents

Systeme de filtrage a echange automatique des filtres pour vehicules a moteur Download PDF

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Publication number
WO1996023668A1
WO1996023668A1 PCT/EP1996/000356 EP9600356W WO9623668A1 WO 1996023668 A1 WO1996023668 A1 WO 1996023668A1 EP 9600356 W EP9600356 W EP 9600356W WO 9623668 A1 WO9623668 A1 WO 9623668A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
filter system
band
active
marking
Prior art date
Application number
PCT/EP1996/000356
Other languages
German (de)
English (en)
Inventor
Oliver Schael
Wolfgang Scholl
Bruno Egner-Walter
Eckhardt Schmid
Original Assignee
Itt Automotive Europe Gmbh
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 Itt Automotive Europe Gmbh filed Critical Itt Automotive Europe Gmbh
Publication of WO1996023668A1 publication Critical patent/WO1996023668A1/fr

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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
    • B01D46/18—Particle separators, e.g. dust precipitators, using filtering belts
    • B01D46/20—Particle separators, e.g. dust precipitators, using filtering belts the belts combined with drums
    • 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
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/46—Auxiliary equipment or operation thereof controlling filtration automatic

Definitions

  • the invention relates to a filter system with a replaceable filter, in particular for motor vehicles.
  • Filters are used for this purpose, which are switched in the path that leads from the opening air into the interior to be protected.
  • filters for motor vehicles have been proposed, for example, in which the opening air is filtered via a filter element before it enters the interior of the motor vehicle.
  • the filter element Since the filter element filters out the harmful particles of the filtered air stream and so pollutes them, it loses its permeability and must be replaced. This takes place regularly at prescribed exchange intervals, together with other maintenance activities for the vehicle prescribed for this interval.
  • the maintenance intervals are often based on kilometers, so that they are in no way characteristic of the contamination of a filter, since the contamination of the filter depends heavily on the quality of the outside air and the filtered amount of air, which in turn is time-dependent.
  • the invention is therefore based on a filter system of the type resulting from the preamble of claim 1. It is the object of the invention to modify such a filter system in such a way that the filter is automatically changed if the filter is sufficiently contaminated.
  • the invention therefore consists in storing subsequent elements within the filter system beyond the currently active filter element.
  • a used active filter element is then replaced by a follow-on element if it loses its effectiveness and threatens to become blocked due to its contamination or is no longer able to absorb enough dirt particles.
  • the replacement is carried out by an automatic replacement process. This can either also be triggered automatically if the active filter element is sufficiently contaminated or can also be carried out manually as soon as a warning device indicates the need for a replacement.
  • a particularly simple construction for the active filter element and the subsequent elements results from the combination of features according to claim 2. Thereafter, the individual filter elements form sections of a filter belt, which are successively brought into the air flow to be filtered.
  • the filter band itself can advantageously be formed in accordance with the combination of features according to claim 3 from a non-woven material such as non-woven paper or a cotton-like material that can be rewound like a film from a donor spool into a take-up spool, similar to a film camera, the exposed portion of a Film, can form the currently active filter element.
  • a non-woven material such as non-woven paper or a cotton-like material that can be rewound like a film from a donor spool into a take-up spool, similar to a film camera, the exposed portion of a Film, can form the currently active filter element.
  • a further simplification for the filter system results from the use of the combination of features according to claim 4, in that, like in a film camera, the coils are arranged on both sides of the film strip, which is exposed to light, as a memory for the filter elements.
  • the combination of features according to claim 5 is recommended in a further development of the invention.
  • a section of the filter film is then transported in the direction of the take-up spool by a triggering device, similar to an automatically transporting camera. This transport is triggered with the aid of a measuring device, the measurement result of which is dependent on the degree of contamination of the currently active filter element.
  • a simple measurement for the degree of soiling results from the combination of features according to claim 6 from the point of view that the permeability of a soiled filter is lower than that of a new section of the filter belt.
  • the air transport quantity which otherwise differs under the same conditions, is used as a trigger criterion for a filter change via the pressure gauge.
  • a particularly simple embodiment of the invention can then be designed in such a way that the filter belt continues to be transported until the pressure drops below the negative pressure threshold in the direction of higher pressure, in that, due to the added unpolluted section of the filter belt, the pump has the same suction power can suck larger amounts of air.
  • a control loop is thus created, which in the area of the permissible negative pressure always conveys the filter belt a little as soon as the permissible negative pressure is exceeded to higher negative pressure values.
  • the disadvantage of such a very simple construction is that the drive starts comparatively often and that the effect of a completely new active filter element is never achieved, since the filter belt travels through the filter container in small steps. In extreme cases, it is conceivable that the filter belt moves constantly, albeit very slowly, and that only the speed of the filter belt is regulated.
  • Another possibility is to specify the transport route and thus the length of the belt section to be transported. This can happen, for example, in that when the drive starts up, it switches off after a predetermined speed of the motor.
  • the combination of features according to claim 9 is recommended in a further development of the invention. It is then possible to switch on the Transport continue to transport the filter belt until the beginning of the new section or the subsequent element or the end of the previously active filter element is recognized.
  • a recess or a hole in the filter band can be recommended as a marking according to the features of claim 10.
  • the pump is preferably provided with a fan wheel according to the features of claim 11, the blade-shaped elements of which promote the flow of air.
  • an activated carbon filter can also be arranged in the filter container, the activated carbon filter preferably being in the air flow direction behind the non-woven filter but still in front of the pressure measuring space.
  • a particularly simple and inexpensive embodiment of the invention results from the combination of features according to claim 13, in which a separate sensor is dispensed with, but the pressure prevailing in the measuring space is used directly to switch the drive or the electric drive motor.
  • an additional detection device can also be provided, which detects whether the filter band in the sensor coil has been completely unwound or not.
  • the combination of features according to claim 14 is recommended in a further development of the invention.
  • FIG. 2 shows a detail from FIG. 1 with a band end cutoff.
  • a fan pump 10 which extends with its fan wheel into a measuring chamber 1 on the suction side.
  • the measuring chamber 1 is preceded by a filter container 2, via which the outside air is conveyed by the pump into the interior of the vehicle below the pump 10.
  • the perforated container wall 12 supports a filter belt 13 which can be wound up from a transmitter coil 4 onto a take-up coil 14.
  • the two coils are rotatably mounted in cassettes 3 arranged on the side of the filter container 2.
  • the take-up spool 14 is driven by a drive motor 6 via a gear 15 in a direction of rotation in which the filter band 13 is wound on the take-up spool.
  • the filter container 2 can additionally be provided with an activated carbon filter 16.
  • the section of the filter belt 13 located in front of the perforated container wall 12 is referred to as the active filter element, because only this area of the filter belt is involved in filtering the outside air drawn in through the filter container.
  • the active filter element 17 will clog with the dirt particles filtered out by it, such as dust, grains, pollen, soot bodies and the like, so that the vacuum in the measuring space 1 increases while the pump 10 output remains the same.
  • the middle area of the membrane 18 of the membrane switch 7 moves to the right until finally an electrical contact is closed, which switches on the drive motor 6.
  • the drive motor 6 then pulls the filter belt via the gear 15 and the take-up spool 14
  • a switch-off device shown in FIG. 2 which is directed towards the band area traveling from the transmitter reel 4 to the take-up reel 14.
  • a lamp can be arranged on the side opposite the filter belt. Openings are made in the filter belt at intervals which correspond to the length of the container wall 12 and thus the length of the active filter element 17. If the belt transport is now switched on, it transports the filter belt until the switch-off detector 5 detects an opening in the filter belt that serves as a marking and then stops the drive motor. After the diaphragm switch 7 has responded due to a vacuum which has become sufficiently large in the measuring space 1, the process just mentioned is repeated.
  • the advantage of this measure is that the filter belt is always rewound by the length of an active filter element, so that an entire new filter area is available for cleaning the outside air.
  • a second marking can also be provided in the filter belt at the end of the belt, by means of which the drive can be finally stopped via the shutdown detector 5 or a separate detector.
  • a warning lamp 19 can be connected to the switch-off detector 5, which indicates that the filter roll has been unwound on the sensor coil and the filter belt must therefore be replaced. This can be done for example by exchanging the two coils 4 and 14 but also by exchanging the two cassettes 3 containing the coils. A further possibility is to combine the two cassettes 3 with the filter container 2 in one piece and thus to insert a complete assembly unit consisting of the two cassettes 3 with the filter container 2 into the filter system. In this way, the active carbon filter can also be replaced at the same time.
  • the cassette can be collected during replacement and the filter fleece can be cleaned by blowing out in a special device and thus reused.
  • the activated carbon filter 16 has to be disposed of (the fleece is rewound during the blowing out).
  • the invention is not only suitable for keeping the interior of motor vehicles clean, but also for other interiors, such as in hospitals.

Abstract

L'invention concerne un système de filtrage de l'air extérieur qui parvient à l'intérieur d'un véhicule. Dans l'état antérieur de l'art, ces systèmes de filtrage sont échangés à la fin d'un délai d'entretien prescrit, quel que soit leur degré d'encrassement. L'invention concerne un système de filtrage dans lequel les éléments de filtrage encrassés sont automatiquement échangés en fonction de leur degré d'encrassement. De façon avantageuse, les éléments individuels de filtrage sont assemblés les uns après les autres pour former une bande de filtrage (13) qui, lorsque le besoin se fait sentir, est transportée par intermittence sur des distances prédéterminées, à la manière d'une pellicule de petit format dans un appareil photographique. Des développements avantageux de l'invention concernent la commande du transport en fonction d'une pression négative se produisant lorsque l'élément de filtrage en utilisation est encrassé. La bande de filtrage peut être échangée au moyen d'une double cassette (13), ce qui permet d'échanger en même temps le filtre au charbon actif (16) contenu dans le boîtier du filtre.
PCT/EP1996/000356 1995-02-02 1996-01-30 Systeme de filtrage a echange automatique des filtres pour vehicules a moteur WO1996023668A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19503303.5 1995-02-02
DE1995103303 DE19503303A1 (de) 1995-02-02 1995-02-02 Filtersystem mit selbsttätigem Filterwechsel für Kraftfahrzeuge

Publications (1)

Publication Number Publication Date
WO1996023668A1 true WO1996023668A1 (fr) 1996-08-08

Family

ID=7752952

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/000356 WO1996023668A1 (fr) 1995-02-02 1996-01-30 Systeme de filtrage a echange automatique des filtres pour vehicules a moteur

Country Status (2)

Country Link
DE (1) DE19503303A1 (fr)
WO (1) WO1996023668A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6084075A (en) * 1996-03-01 2000-07-04 Pharmacia & Upjohn Ab Agonist and antagonist antibodies to the chemokine receptor-2 (CCR2)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19738197C1 (de) * 1997-09-02 1999-02-18 Webasto Klimatech Gmbh Belüftungs- und/oder Klimaanlagen in Omnibussen
FR2842432B1 (fr) * 2002-07-16 2005-04-29 Valeo Climatisation Dispositif de filtration d'air pour une installation de chauffage et/ou climatisation de vehicule automobile
DE102018108815A1 (de) * 2018-04-13 2019-10-17 Hengst Se Rollbandluftfilter
CN114013246A (zh) * 2021-11-23 2022-02-08 珠海格力电器股份有限公司 格栅组件、通风组件和车载空调

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1025848A (en) * 1964-03-16 1966-04-14 Ozonair Engineering Company Lt Improvements in or relating to air filter assemblies
DE6811436U (de) * 1968-12-14 1969-04-10 Trox Gmbh Geb Rollbandfilter
DE7140423U (de) * 1971-10-26 1972-10-05 Gebr Trox Gmbh Rollbandfilter mit automatischer oder halbautomatischer steuerung
DE9420146U1 (de) * 1994-12-16 1995-02-09 Acg Deutschland Gmbh Partikelfilter für Fahrzeuge

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2839063C3 (de) * 1978-09-07 1982-04-08 Nordenskjöld, Reinhart von, Dr.-Ing., 8011 Solalinden Fluidfilter
DE3731892A1 (de) * 1987-09-23 1989-04-13 Seco Maschinenbau Gmbh & Co Kg Einrichtung zur kontinuierlichen filterung von luft mittels aktivkohle
DE9413742U1 (de) * 1994-08-25 1994-11-10 Jensen Ag Burgdorf Flusenfilter in einer Anlage zum Behandeln von Kleidungsstücken

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1025848A (en) * 1964-03-16 1966-04-14 Ozonair Engineering Company Lt Improvements in or relating to air filter assemblies
DE6811436U (de) * 1968-12-14 1969-04-10 Trox Gmbh Geb Rollbandfilter
DE7140423U (de) * 1971-10-26 1972-10-05 Gebr Trox Gmbh Rollbandfilter mit automatischer oder halbautomatischer steuerung
DE9420146U1 (de) * 1994-12-16 1995-02-09 Acg Deutschland Gmbh Partikelfilter für Fahrzeuge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6084075A (en) * 1996-03-01 2000-07-04 Pharmacia & Upjohn Ab Agonist and antagonist antibodies to the chemokine receptor-2 (CCR2)

Also Published As

Publication number Publication date
DE19503303A1 (de) 1996-08-08

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