JP2001293318A - Filter for air-conditioning automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter which is simple and economical and low in mechanical resistance. SOLUTION: The filter to be set especially in a ventilator and/or a heating apparatus and/or an air conditioner for an automobile is constituted of a filter medium (31) having pleats and surrounded at least partially by a plastic frame (32) fixed to the filter medium (31). The pleat (42) has a V-shaped cross section, and the side walls (33, 34, 133) of the frame (32) agree with the V-shape at both ends of the pleat (42) and have openings at least alternately. As a result, both ends of the pleat (42) of the filter medium are not closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for air conditioning of a motor vehicle, and more particularly to a ventilator and / or a heater and / or a heater.
Alternatively, the present invention relates to a filtering device to be installed in an air conditioner.

[0002]

2. Description of the Related Art Documents describing such devices include, for example, US-A-
5,667,545 and US-A-5,679,122.

[0003] The devices described in these documents have a soft filter medium with folds, the frame surrounding the filter medium being provided with two side walls and two lateral walls. The cross-section of the side wall is triangular-shaped, with a sheet, and the shape of the bottom is a triangle covering the entire height of the fold of the filtration media, closing both ends of the fold.

Therefore, the shape of the side wall is like a saw tooth.

[0005] In the document US-A-5,667,545,
The frame is rigid so that the filtration device cannot be deformed.

[0006] The filtration device proposed in document US-A-5,679,122 can be temporarily deformed when the device is inserted or withdrawn in the device, or it can It can be permanently deformed in consideration of the fact that the shape of the storage section is not planar.

To this end, the sheet is provided with a bent portion between two adjacent bottom portions. These folds may break during various operations, which may result in an awkward appearance of the frame or unusual forces on the filtration media.

The present invention seeks to overcome these disadvantages simply and economically.

[0009]

The object of the present invention is solved by a filtering device comprising: Firstly, a filtering device for mounting on a ventilation device and / or a heating device and / or an air conditioning device, especially for a motor vehicle, the filtering device being composed of a pleated filter medium (31), and A filtering device, at least partially surrounded by a plastic frame (32) fixed to (31), wherein the cross-sectional shape of the folds (42) of the filtering medium is V-shaped, comprising: The side walls (33, 34, 133) are provided with folds (4) of the filtration medium (31).
2) conforms to the V-shaped shape at both ends and has at least alternating openings, so that the folds (4
2) The filtering device, wherein both ends are not closed. Secondly, the filtration medium (31) has a non-woven mat consisting of slivers from a card;
3. The filtration device according to item 1. Third, the filtration device according to the second, characterized in that the filtration medium (31) has a grid. 4th
The filtering device according to claim 3, further comprising a gas absorbing means disposed between the lattice and the nonwoven mat. Fifthly, a non-woven mat comprising slivers from a card is disposed on both sides of the absorbing means. Sixth, the plastic material of the frame (32) is a soft thermoplastic material,
The filtration device according to claim 1. Seventh, the filtering device according to the sixth feature, wherein the plastic material of the frame (32) is a thermoplastic elastomer. Eighth, the filtering device according to claim 1, wherein the plastic material of the frame (32) is a hard thermoplastic material. Ninth, the side walls (33, 34, 13)
The filtering device according to claim 1, characterized in that a gas-tight packing (35) is provided on the outside of (3). Tenthly, the filtering device of claim 1, characterized in that the shape of the side walls (33, 34) is V-shaped and runs along both ends of the folds (42) of the filtering medium (31). Eleventh, a filtering device according to claim 1, characterized in that the side walls have alternating bottoms that are lower than the filter media folds (42). Twelfth, the side walls (33, 34, 133) conform to the V-shape at both ends of the folds (42) of the filtration media (31) by replication molding, so that the plastic frame (32) The filtration device according to claim 10, characterized in that is fixed to the filtration medium (31) by duplication molding. Thirteenth, the side wall (1
33. Filter device according to claim 12, characterized in that 33) conforms to the ends of the V-shape of the folds (42) by means of replication molding and has alternating half bottoms (63). 14th
2. The filtering device according to claim 1, wherein the side walls (33, 34, 133) have small angle members (73).

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The filtering device according to the invention is intended for installation in ventilation and / or heating and / or air-conditioning systems, in particular for motor vehicles, and is composed of a pleated filtration medium.
It is at least partially surrounded by a plastic frame secured to the filtration media, and the folds of the filtration media have a V-shaped cross section. A feature of the filtration device is that the side walls of the frame conform to the V-shape of the ends of the fold of the filtration media and have at least alternating openings, so that the ends of the folds of the filtration media are plugged. It is not missing.

According to the invention, and in particular by its opening, it is possible to temporarily deform the filtering device or to permanently deform the filtering device when the shape of the housing in which the filtering device is mounted is not planar. it can.

The mechanical resistance of the filtration device is also good.

It will also be appreciated that the frame matches the ends of the fold and that no fine seams need to be provided outside the filtration media. Therefore, the filtration medium and the side wall of the frame can be simultaneously deformed.

It will be appreciated that the opening in the frame reduces material consumption. The weight of the filtration device is also lighter and harder to break.

[0015] In one embodiment, the side wall is V-shaped and follows the ends of the fold of the filtration media and coincides with the ends.

Therefore, both ends of the fold are open unless the thickness of the side wall is taken into account.

In another embodiment, the side wall has a half bottom that alternately closes some of the ends of the fold.

As a variant, these side walls have alternating bottoms, lower than the folds.

As a method of fixing the frame to both ends of the fold of the filtration medium, bonding, ultrasonic welding, indirect heat input, and the like can be considered.

[0020] Preferably, the frame is fixed to both ends of the fold of the filtration medium by duplication molding, whereby a rigid fixation can be easily performed and appropriate control of the thickness of the side wall can be performed. .

[0021] The filtration medium preferably has a non-woven mat consisting of slivers from the card to reduce the density of the filtration medium.

Preferably, the sliver from the card forms a single top.

In order to improve the mechanical durability, the filtration medium preferably contains a soft grid.

[0024] Advantageously, the filter medium has gas absorbing means narrowly disposed between its grid and said nonwoven mat.

Preferably, the absorbing means is provided with a soft activated carbon tissue.

Advantageously, said absorbing means is provided with an activated carbon layer.

Preferably, nonwoven mats consisting of slivers from the card are arranged on both sides of the absorbing means.

Preferably, the grids are located on both sides of the filtration medium.

It is desirable that the main component of the nonwoven mat is a long fiber and its length is 38 mm or more.

The average diameter of the long fibers is preferably at least 10 μm.

Preferably, the material of the long fiber is thermoplastic.

The long fibers are preferably polypropylene fibers.

Preferably, the plastic material of the frame is a soft thermoplastic material in order to further improve the softness of the filtration device.

The plastic material of the frame is preferably a thermoplastic elastomer.

In a variant, the frame is made of a hard thermoplastic material, such as polypropylene with talc, for example.

Preferably, the side wall has one end connected to a lateral surface, the lateral surface having a peripheral edge, a catching means provided on the outside, and a fixing means provided on the lateral surface.

[0037] The side wall desirably has one end connected to a laterally molded lateral wall of the filtration media.

[0038] The side walls and / or the lateral walls are preferably provided on the outside with retrofitting gas-tight packing.

Preferably, the side walls have alternating bottom halves in addition to the duplicate molds at the V-shaped ends of the fold. The alternating half bottoms are obtained by replication molding. As a variant, the alternating bottoms of the halves may be external in the form of an insert.

It is advantageous if the side walls contain small squares.

Thus, the filtering device according to the invention has the form of a flexible small box which can be temporarily deformed during insertion or withdrawal inside a ventilation device and / or a heating device and / or an air conditioning device. It is convenient to exhibit This considerably simplifies the task, especially when it is generally difficult to get into and out of the storage of the filtration device.

[0042]

BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the invention will become apparent from the following description of embodiments, with reference to the accompanying drawings, in which: FIG.

FIG. 1 is a schematic perspective view of the filtration device of the present invention.

FIG. 2 is an enlarged view of a portion indicated by II in FIG.

FIGS. 3 and 4 are similar to FIG. 2 and each show a variant.

The filtration medium 31 provided in the filtration device 30 forms a filter for soft particles and is preferably formed of a single top non-woven mat consisting of slivers from a card. The filtration medium 31 has a fold.

The main component of the nonwoven mat is a long fiber,
The length is desirably 38 mm or more. The average diameter of the long fibers is 10 μm or more. The material of the fibers is thermoplastic, but here is polypropylene for economic reasons.

The nonwoven mat is preferably combined with a soft grid made of, for example, polypropylene. The position of this grid is located downstream in relation to the direction of air circulation in the filtering device 30.

[0049] The filtration media 31 may also be combined into two soft grids having folds.

The grid or grids may or may not be integral to the nonwoven mat. When integrated with the mat, it is a partial integration,
As means for this, for example, ultrasonic welding, bonding (welding), or mechanical joining by jet water flow is used.

The filtering device 30 may be a filter for particles, or a so-called composite filter, that is, a filter for particles and also serves as a filter for preventing toxic gas. In this case, gas absorbing means is added.

The gas absorbing means may have an activated carbon layer, or may have a soft foldable carbon tissue similar to the filtration medium 31.

The frame 32 is prepared to support various components of the filtering device 30. Methods for fixing the frame 32 to the filtering medium include, for example, bonding, ultrasonic welding,
There are various methods, such as indirect heat input.

Here, the frame 32 is fixed to the filtration medium by duplication molding.

More specifically, the frame 32 has two side walls 33 and 34, which are formed into a V-shape at both ends of the fold 42 of the foldable filtration media 31 by replication molding. Agree. As can be seen in FIG. 2, two walls 33,
34 are configured.

The V-shaped cross section of the fold of the filtration media 31 has a top portion and two bottom portions remote from the top portion. Thus, there is a valley between the ridge vertices.

One end of each of the side walls 33 and 34 is connected to a horizontal wall called a horizontal surface 36.
6 extends parallel to the folds 42 and protrudes both in height and width with respect to the side walls 33, 34 and the soft filtration medium 31. As a result, the perimeter 37 is suitably defined to cooperate with the edge of the opening for the introduction of the filtering device 30 of the equipment provided. With the help of an airtight packing, it is possible to cooperate in an airtight state if desired.

In this case, the extra metal protruding from the inner side of the horizontal surface 36 surrounds the lateral edge of the filtration medium 31 by replication molding. In the illustrated form, the lateral edge of the filtration media 31 is of a generally horizontal narrow partition wall 38, which extends in the direction of the lateral surface 36 to a first V-shaped fold 42. The inner sides of the lateral surfaces are connected to the side walls 33, 34 by side connecting parts 43, 44 so that the longitudinal edges of said narrow partition wall 38 and the first slope of the first V-shaped fold 42 are also involved. . The lateral surface 36 is provided on its outer surface with catching means such as, for example, a tongue 40, a fixing leg 45 or the like.

In this case, on the side opposite to the side surface 36, there is a horizontal wall 41 called the bottom, which covers the horizontal edge of the narrow partition wall 39 by duplication molding. The narrow partition wall 39, similar to the previously described narrow partition wall 38, is generally horizontal and extends the last V-shaped fold of the filtration media 31. This lateral wall 41 is for cooperating with the bottom of the housing of the equipment to be provided. It extends laterally along side connecting parts 53, 54 covering the longitudinal edges of the narrow partition wall 39.

Therefore, in the illustrated example, the side walls 33, 3
4 are made by replica molding the ends of the V-shape of the fold 42, so that they themselves assume a V-shape, which results in less material consumption and a smaller frame per weight.
It is a simple and economical solution. The V-shaped ends of the fold 42 are not closed by the frame, except when the size of the side wall is small.

As a material that can be used for the replication molding of the filtration medium 31, a hard thermoplastic material or a soft thermoplastic material having properties comparable to vulcanized rubber can be considered. Deformation of the filtration device 30 of any material is possible, of course at the fold, by deformation of the filtration medium 31 and by deformation of the frame 32, in particular the side walls 33, 34, The side walls can be deformed on a plane without impeding the deformation of the filtration medium 31 in a direction perpendicular to the direction of the fold, for example.

The duplication molding operation is preferably by injection molding, but it is possible to integrate individual functions such as fixing, as already seen. In addition, for example, when a soft plastic material is used, a function such as airtightness can be expected therefrom.

A variety of materials having different properties depending on the stresses required can be co-molded therewith.

As for the material, for example, MULTIBA
It is sold under the trademark MULTIFLEX by SE, or Advanced Elastomer.
SANTOPRENE from Systems (AES)
Good results have been obtained with talc-added polypropylene and thermoplastic elastomers, such as those sold under the trademark T.V.

With the arrangement described above for the filter, it has the interesting feature of softness, which allows it to be temporarily curved,
In addition, you can even drill holes with a cone. As a result, filters can be more easily introduced into ventilation and / or heating and / or air conditioning equipment for motor vehicles,
Alternatively, it can be withdrawn therefrom and is therefore particularly suitable when it is difficult to access the storage of the filtration device.

In the illustrated embodiment, the side walls 33, 3
4 and the lateral wall 41 are covered with an airtight packing 35, for example, attached later by gluing. Such packing 3
It is preferable that 5 can be a foam packing. The packing 35 is installed at the height of the top of the fold 42.

According to the variant of FIG. 3, the side wall, such as the side wall 133, also has a half bottom 63, in addition to the duplicate moldings 33 at the V-shaped ends of the fold 42. The shapes of the bottoms are alternately arranged in a triangular shape as a whole, and the duplicate moldings 33 extend in a plane transverse to the fold 42. As a method of making such a half bottom 63,
It may be performed by replication molding, and as a modification,
There is also a method of inserting the V-shaped ends of the fold 42 during the duplication molding operation.

According to the modification shown in FIG. 4, the side wall 133 has the small square member 73 having a small cross section. The small squares are used, for example, to guide the filter device 30 when it is installed in a housing. The small squares 73 are used to receive the small squares 73 and airtight packing inside the housing. There is a suitable groove.

In a variant not shown, FIGS. 1 and 2
Side walls 33, 34 also include small squares similar to small squares 73 of FIG.

As can be easily understood, the side walls as described with reference to FIGS. 3 and 4 remain completely flexible in the filtering device 30 as mentioned with reference to FIGS.

In each case, an opening is provided in the side wall of the frame, and as a result, both ends of the fold 42 of the filtration medium are not closed. These openings are at least alternating.

In FIG. 2, the inside of the fold and the valley-like portion are not closed apart from the excess of the side walls 33, 34.

3 and 4, the half bottoms 63 are arranged alternately. Half bottom 63 seals fold 42 at the level of its top. On the other hand, a half bottom 63 closes the bottom of each valley adjacent to the fold.
The two half bottoms 63 extend outside the associated fold 42 and close to the base of the fold 42. Therefore, the openings in the frame are alternately arranged, so as to supplement the half bottom 63.

A band of material is formed between the half bottom 63 which closes the interior of the fold 42 at the height of its top and the half bottom which closes the bottom of the valley adjacent to the base of the fold. . FIG.
In and 4, such a strip extends halfway up the height of the fold. Because there is a half bottom 63 there. It goes without saying that the height of this half bottom 63 can be reduced, and thus the height of the material strip allowing the deformation of the filtering device can be increased.

The lowering of the height can be achieved by the side wall 3.
FIG. 1 shows that 3, 34 have a V-shaped configuration and follow both ends of a fold 42 of the filtration media, thereby conforming to said fold.
Until the embodiments of 2 and 2 are reached, this can be done.

As a variant, the band of material dividing the bottom 63 is slightly below or slightly above the height of the fold 42 so that the side walls have a lower height than the fold 42 of the filtration media. It is also possible to have alternating bottoms.

The production of the non-woven mat constituting the filtration medium 31 can be performed as follows.

A polypropylene fiber cut to a length of 40 mm with a fineness of 1.7 dtex (diameter 14 μm) is introduced into a mixer.

The resulting fiber mixture is then placed in a disintegrator and further into a storage and then carded with a double combing wool type card means equipped with a random mixing device to give an isotropic mixture. You get a sliver from the card.

When the sliver comes out of the card,
It is introduced into the condenser and formed on one top.

The choice of card and condenser parameters is such that a top mass of about 20 to 150 g / m ² per unit surface area is obtained.

The top is placed on a carpet and then assembled by hydraulic bundling.

The hydraulic bundling operation consists of passing a high-pressure, fine jet (of 40 to 200 bar) through a top placed on a rotating drum.

While bouncing on the drum, the jets of water cause the fibers to bond and give the top a large mechanical resistance, while the density does not increase consistently.

After passing through the tunnel dryer, the top is wound up.

Next, the top is taken up again and subjected to a folding operation.

The mass per unit surface area of the filter formed at the top having a thickness of 0.84 mm is 66 g.
/ M ² and the density is 0.07.

The efficiency of the filter thus produced
100cm cross section to test ^TwoInto the flow tube
Filter, and pass an air flow containing particles at a speed of 20 cm / sec.
did.

The particles are powders referred to as “SAE fine powders”, which are specified in the US standard as SAEJ726 / ISO5011.

The concentration of the particles is 100 mg / m ³ .

On the one hand, it was observed that under these conditions the pressure lost through the filter was only 14 Pa, and on the other hand the efficiency reached 80%.

The filtration medium obtained by such treatment has a low density, a low original value, and good mechanical durability.
This filtration medium is also very soft.

Needless to say, in a variant, the nonwoven mat is selected from the group of thermoplastic fibers such as polyethylene fibers, polyester fibers, polycarbonate fibers and polyamide fibers.

The filtration medium may be provided with two non-woven layers.
A soft grid for reinforcement is placed between the two layers, the two non-woven layers being at least partially penetrated into each other, so that the whole consisting of the two layers and the grid is united It has become.

[0095]

According to the present invention, it is possible to provide a filtration device which is simple, economical and has good mechanical resistance.
Specifically, the side walls of the frame conform to the V-shape at both ends of the folds of the filtration media, and have alternating openings, which can reduce material consumption and reduce weight. Lighter,
Because the openings do not block both ends of the fold, the filtration media and the side walls of the frame can be temporarily or permanently deformed.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a filtration device of the present invention.

FIG. 2 is an enlarged view of a portion indicated by II in FIG. 1;

FIG. 3 shows a variant similar to FIG.

FIG. 4 shows a variant similar to FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 30 Filtration apparatus 31 Filtration medium 32 Frame 33 Side wall 34 Side wall 35 Packing 36 Side surface 37 Perimeter 38 Narrow partition wall 39 Narrow partition wall 40 Tongue member 41 Side wall 42 Fold 43 Side connection part 44 Side connection part 45 Fixed leg 53 Side connection part 54 Side connection part 63 Bottom part 73 Small angle material 133 Side wall

Claims (14)

[Claims] 1. A filtering device comprising a pleated filtration medium and at least partially surrounded by a plastic frame fixed to the filtration medium, wherein the fold of the filtration medium has a V-shaped cross section. The side walls of the frame have V
A filtering device characterized by conforming to the shape of a letter. 2. The filtering device according to claim 1, wherein the filtering medium comprises a non-woven mat consisting of slivers from a card. 3. The filtering device according to claim 2, wherein the filtering medium has a grid. 4. The filtering device according to claim 3, further comprising gas absorbing means disposed between the grid and the nonwoven mat. 5. The filtering device according to claim 4, wherein non-woven mats made of slivers from cards are arranged on both sides of the absorbing means. 6. The filtering device according to claim 1, wherein the plastic material of the frame is a soft thermoplastic material. 7. The filtering device according to claim 6, wherein the plastic material of the frame is a thermoplastic elastomer. 8. The filtering device according to claim 1, wherein the plastic material of the frame is a hard thermoplastic material. 9. The filtering device according to claim 1, wherein an airtight packing is provided on the outside of the side wall. 10. The filtering device according to claim 1, wherein the shape of the side wall is V-shaped and is along both ends of the fold of the filtering medium. 11. The filtering device according to claim 1, wherein the side walls have alternating bottoms that are lower in height than the folds of the filtering media. 12. The side wall conforms to the V-shape at both ends of the fold of the filtration media by replication molding, so that the plastic frame is fixed to the filtration media by replication molding. The filtration device according to claim 10, wherein 13. The filtering device according to claim 12, wherein the side walls conform to both ends of the V-shape of the fold by replication molding and have alternating half bottoms. 14. The filtering device according to claim 1, wherein the side wall has a small angle material.