DE1933934U - FRESH AIR FILTER INSERT, IN PARTICULAR FOR THE INTERIOR AIR OF MOTOR VEHICLES. - Google Patents

Description

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F 27 685 / 50e Gbm March 8, 1965

Heinz FISCHER
Pressing and stamping plant

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Utility model registration: Germany
Password: "filter element". . "

A 10 181 · "■ ^;

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Fresh air filter insert

The invention relates to a fresh air filter insert, in particular for the interior air of motor vehicles, consisting of a flat cutout or corresponding to the shape of the filter housing Die-cut from "a filter mat, the edge of which is provided with a frame is determined by its shape and / or its weight and / or its material ensures a secure fit of the filter insert and thus prevents the »■ penetration of unfiltered vehicle air into the ventilation system.

There are already various filter inserts in motor vehicles known which are used for "the ventilation of the car interior To filter fresh air. These filter cartridges consist of one Felt-like filter material, which is used for the purpose of keeping the filter material dry and straining the cut filter material is provided with an approximately U-profile having metal frame. These metal frames ?; are relatively expensive because the Shaping must be made in difficult and time-consuming manual labor. In other known filter inserts are about the Length and width of the filter fabric cutout extending holding wires are provided, the loop-shaped free ends by means of hollow rivets with the Filter fabric are connected.

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Apart from the disadvantages already mentioned, these known filter inserts do not meet the requirements of practice in any way Wise, be it "that the wires if you touch the use carelessly be bent, be it 'that the filter pores are too small, - so that the Flow resistance inhibits the exchange of air in an undesirable manner.

According to the invention, the filter mat from which the filter inserts are punched out consists of felted or glued together native and / or synthetic fibers.

It has proven to be expedient to use such filter mats for the present purpose that are wholly or partially made up of such There are fibers that are electrostatically charged by the air passing them with the result that in the filter mat. also those particles are retained, which - after the, purely geometrical Dimensions - would pass through the filter mat unhindered.

According to the invention, the edge of the filter mat is made of steel connected to a preferably non-metallic frame, which is made, for example, of a material that can also be used as a sealing material, which is formed by | its heaviness and limited deformability the "correct" fit of the filter element effected in the filter housing, can be produced.

The material used to manufacture the frame can, for example, made of bitumen or a similar material comparable in terms of its physical and / or chemical behavior with a preference » consist of short-fiber filler. The following are only mentioned as examples: bitumen cardboard, special sealing cardboard, body cardboard and the like. " To increase the weight of the filter insert frame, the material used for its manufacture can contain a specifically heavy filler, e.g. Contains barium oxide. · '

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A 10 181 "3 -

In addition, a particularly secure fit with good closing force of the filter frame can be achieved in the filter housing, which is preferably made of sheet steel. housing can be achieved by using ferromagnetic material in the frame Powders of high coercive force and remanence are bound, as a result of which the two parts exert a magnetic force of attraction on one another.

The connection of the frame with the filter mat die cut can be done in any way, for example by gluing, stapling, riveting, sewing, Welding or the like. respectively. The frame can be shaped accordingly enclose the edges of the filter mat on both sides.

The filter mat can be stiffened by transverse webs in order to increase the dimensional stability of the filter insert, which is expedient consist of the same material as the frame, in which case the frame with its transverse webs is punched out of a corresponding material plate.

Claims (15)

A 10 181, -, 4- CLAIMS 1. Fresh air filter insert, in particular for the interior air of motor vehicles, consisting of a flat, the shape of the filter housing corresponding cutout or punched from a filter mat, the edge of which is provided with a frame preferably made of a non-metallic material, which in addition to the. Back pressure of a secure seat of the filter cartridge be ~ the filter acts on fresh air through its shape and _weight: works and dadi ^ uch the Bindringen of unfiltered bypass air from entering the ventilation system. ; 2. Filter insert according to claim 1,. Characterized in that the to its production filter mat used from matted and / or glued together he native and / or artificial fibers consists. 3. Filter insert according to claim 1 and / or 2, characterized in that that the filter mat consists wholly or partially of such fibers. electrostatically absorbed by the air passing by them · *; are loaded with the result that in the filter atich such par » small objects are held back, which according to the geonaetrical wetting would pass through the filter mat unhindered. 4. Filter insert according to at least one of claims 1 to 3, characterized characterized in that the frame is made of a z..B-, also as a sealing material usable material consists of: its gravity;, and its limited ^ deformability den. correct ^: -. seat of the filter « insert caused by the filter housing. ; 5. Filter insert according to at least one of claims 1 to 4, characterized characterized in that the material for the frame of the filter insert made of bitumen or a similar one in terms of its ^ physical and / or chemical composition of a comparable material with, a preferably short-fiber ^ filler. ■ A 10 181 - 5 -ζ ' ^: ".: .. ..;; // - ■; \ v :: r -; ■■■. 6. Filter insert according to at least one of claims 1 to 5 ^ characterized in that the material for the frame of the "FjMergäüsMzsms contains a specific heavy filler / eg barium oxide, ^.> 7. Filter insert according to at least one of claims 1 to 6,: characterized in that the frame material contains barium oxide and a fibrous material as filler. -.- ■ _- ■ '■ - ■■] ._ ■ ■? ^: ';-; 8. Filter insert according to at least one of claims 1 to 7, '- by.'., characterized in that the frame material is finely ground or powder contains shaped permanent magnet alloys of high coercive force. 9. Filter insert according to at least one of claims 1 to 8, characterized characterized in that its frame is provided with transverse teeth. 10. Filter insert according to at least one of claims 1 to 9, .due to this; characterized in that the frame including any existing ^: 'Crossbars is punched out of a corresponding material plate. 11. Filter insert according to .at least one of claims 1 to 10, characterized in that the connection between the filter mat and the frame is made by gluing.- _: ■ -_ r./:- . - _; ^; .; / _': Ν 12. Filter insert according to at least one of claims 1 to 11, characterized characterized in that the connection between the filter mat and cream is made by stapling. "Vv;; 13. Filter insert according to at least one of the sprays 1 to; 1; 2, characterized in that the connection between the filter mat and the frame is made by sewing. '' -_ _': ^{/: \:;;} 14. Filter insert according to at least one of claims 1 ^^ to 13, characterized in that the connection between the filter mat and frame is made by welding. · ^_"■::::; - '""."." a 10 181 ~ 6 «- ^{;; v} -.:;;■;■:■: ν. ■: ■." ■■. 15. Filter insert according to at least one of claims 1 to X4. _{: 3} characterized in that the frame encloses the edges of the filter mat on both sides.