CN212757768U

CN212757768U - Composite filter screen assembly

Info

Publication number: CN212757768U
Application number: CN202020940991.2U
Authority: CN
Inventors: 陈双扬; 杨威; 蔺勇智
Original assignee: Infinitus China Co Ltd
Current assignee: Infinitus China Co Ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-03-23
Anticipated expiration: 2030-05-28

Abstract

The utility model relates to the technical field of filter screens, in particular to a composite filter screen assembly, which comprises a first shell, a second shell and a filter screen fixed between the first shell and the second shell, wherein the filter screen is folded layer by layer around the circumferential direction and is in a ring shape as a whole; the filter screen comprises a supporting layer, a filtering layer and a protective layer which are stacked in sequence. The filter layer contains silicon dioxide and active carbon, effectively filters pollutants in the vehicle such as formaldehyde, peculiar smell and the like, has simple manufacturing process, does not need to add a bonding agent, does not influence the specific surface area of the active carbon, and also avoids secondary pollution. Moreover, a certain rule is made for the air inlet included angle of the windward side of the filter screen and the air outlet included angle of the air outlet side of the filter screen, and the filter layer is matched, so that the wind resistance can be effectively reduced, and the primary filtering efficiency and the overall filtering performance are improved.

Description

Composite filter screen assembly

Technical Field

The utility model relates to a filter screen technical field, more specifically relates to a compound filter screen assembly.

Background

The filter screen is the indispensable part of on-vehicle air purifier, and common filter screen is the square positive shape mostly, and the filter screen expansion area is less, and the low-usage. The common filter screen mainly has the following defects: 1) only the silicon dioxide is added into the filter screen, but the silicon dioxide has an efficient removing effect on formaldehyde, but cannot adsorb peculiar smell in the air, and has a single removing effect on environmental pollutants in the current vehicle; 2) the filter screen is provided with a two-layer structure, one layer is silicon dioxide, the other layer is activated carbon, but the activated silicon is attached to the surface of the silicon dioxide by using an adhesive, the adhesive has great influence on the specific surface area and the adsorption effect of the activated carbon, and meanwhile, the processing cost is high, the glue smell is easy to generate secondary pollution.

Patent CN201820443678.0 discloses an adopt porous structure's silica filter screen, and this technical scheme adopts silica as the filter core of main part as the filter screen, has important effect to harmful gas such as absorption formaldehyde, but silica can't adsorb to the peculiar smell in the air, and purifying effect is comprehensive not enough.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome above-mentioned prior art the defect, provide a compound filter screen assembly, purifying effect is comprehensive, and the filter screen structure need not add the bonding agent, is difficult for producing secondary pollution, and the filter screen has effectively increased filter screen expansion area moreover.

In order to solve the technical problem, the utility model discloses a technical scheme is:

a composite filter screen assembly comprises a first shell, a second shell and a filter screen fixed between the first shell and the second shell, wherein the filter screen is folded layer by layer in the circumferential direction and is annular as a whole; the filter screen comprises a supporting layer, a filtering layer and a protective layer which are stacked in sequence. Wherein, first casing, second casing are installed fixedly to the filter screen, and the filter screen is the ring shape, and filtering gas loops through supporting layer, filter layer and the protective layer of filter screen to reach purifying effect.

As one of the preferred scheme, the folding angle of filter screen divide into wind contained angle and air-out contained angle, and the wind contained angle is towards the ring outside, and the air-out contained angle is towards the ring inboard, and filtering gas flows to the ring inboard by the ring outside.

As one preferable scheme, the angle range of the air inlet included angle is 4.5-6.5 degrees, and the size of the air inlet included angle is twice that of the air outlet included angle. According to the number of the folded mountains designed by the filter screen, the angle can be properly adjusted, the minimum pressure loss value of the whole filter screen is ensured, the air speed is low, and the filtering efficiency of polluted air every time is improved. Certain stipulations are made to the air inlet contained angle of filter screen windward side and the air-out contained angle of air-out face, and the combination of each layer of cooperation filter screen can effectively reduce the windage, promotes first filtration efficiency and holistic filtration performance.

As one of the preferred scheme, the filter screen is an unclosed ring, and the ring opening is clamped and fixed on the first shell and the second shell. First casing, second casing are injection moulding's product, are fixed in the filter screen between first casing, the second casing, effectively protect the filter screen in transportation, use, handling, the condition of deformation does not appear.

Preferably, the support layer and the protective layer are both high-efficiency filter paper. The high-efficiency filter paper is made from glass fiber as a main raw material by a wet forming process, has the characteristics of uniform fiber distribution, large dust holding capacity, small resistance, high strength and the like, and is an ideal air filter material.

As a preferable scheme, the support layer is PET high-efficiency filter paper or PET/PP composite high-efficiency filter paper.

As one preferable scheme, the protective layer is PP high-efficiency filter paper.

As one of the preferable schemes, the filtering layer is silica particles. The silica particles are white transparent granular polymers, and can effectively filter harmful gases such as formaldehyde and the like.

As one of preferable solutions, the filter layer is mixed with columnar activated carbon particles. The columnar activated carbon particles are cylindrical particles, and are modified and activated to effectively adsorb peculiar smell.

In one preferred embodiment, the columnar activated carbon is crushed carbon particles or ellipsoidal shell carbon particles.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a composite filter screen assembly, 1) the filter layer contains silicon dioxide and active carbon, effectively filters pollutants in the vehicle such as formaldehyde and peculiar smell, has simple manufacturing process, does not need to add adhesive, does not influence the specific surface area of the active carbon, and also avoids secondary pollution; 2) the air inlet included angle of the windward side of the filter screen and the air outlet included angle of the air outlet side of the filter screen are regulated to a certain degree, and the filter layer is matched, so that the wind resistance can be effectively reduced, and the primary filtering efficiency and the integral filtering performance are improved; 3) the annular filter screen is fixed between the first shell and the second shell, so that the filter screen is effectively protected from deformation in the processes of transportation, use and carrying; 4) the circular ring-shaped filter screen is used, air enters the filter screen at an angle close to 360 degrees, the air inlet area is improved, meanwhile, the expansion area of the filter screen is increased, and the product purification capacity is improved.

Drawings

Fig. 1 is an exploded view of the assembly of the present invention.

Fig. 2 is a schematic diagram of a filter screen.

Fig. 3 is a partially enlarged view of the position a.

Fig. 4 is a schematic view of a filter screen structure.

The air filter comprises a first shell 1, a second shell 2, a filter screen 3, a supporting layer 31, a filter layer 32, a protective layer 33, an air inlet included angle 301 and an air outlet included angle 302.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", "long", "short", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limiting the present patent, and those skilled in the art will understand the specific meaning of the terms according to their specific circumstances.

The technical solution of the present invention is further described in detail by the following specific embodiments in combination with the accompanying drawings:

example 1

As shown in fig. 1-2, the present embodiment provides a composite filter screen assembly, which includes a first casing 1, a second casing 2 and a filter screen 3 fixed between the first casing 1 and the second casing 2, wherein the first casing 1 and the second casing 2 are both formed by injection molding, the filter screen 3 is folded layer by layer around the circumferential direction, and the whole filter screen is annular, and the filtering gas flows from the outer side of the ring to the inner side of the ring. This embodiment filter screen 3 is for not sealing the ring, and ring opening joint is fixed at first casing 1, second casing 2, and first casing 1, second casing 2 correspond and are equipped with the joint structure.

As shown in fig. 3, the folding angle of the filter screen 3 is divided into an air inlet included angle 301 of a windward side and an air outlet included angle 302 of an air outlet side, the air inlet included angle 301 faces the outer side of the ring, the air outlet included angle 302 faces the inner side of the ring, in order to effectively reduce wind resistance, the angle range of the air inlet included angle 301 is selected to be 4.5-6.5 degrees, the air outlet included angle 302 of the filter screen 3 is 2.25-3.75 degrees, in the folding process of the filter screen 3, the air inlet included angle 301 is usually set to be 2 times of the air outlet included angle 302, the angle can be properly adjusted according to the number of folding mountains designed on the filter screen 3, the pressure loss value of the whole filter screen 3 is ensured to be minimum, the wind speed is low, the filtering efficiency of polluted air.

In addition, as shown in fig. 4, the filter screen 3 includes a supporting layer 31, a filtering layer 32 and a protective layer 33, which are stacked in sequence, where the supporting layer 31 and the protective layer 33 are both high-efficiency low-resistance filter paper, where the supporting layer 31 is PET high-efficiency filter paper, and the protective layer 33 is PP high-efficiency filter paper. Filter layer 32 is the silica granule, and filter layer 32 has still mixed the column active carbon granule, and this embodiment column active carbon is broken carbon particle, uses tiny silica granule and column active carbon, can effectual reduction windage, promotes contaminated air's filtration efficiency.

Silica particles and columnar active carbon particles are uniformly scattered on the supporting layer 31 of the filter screen 3, and then a protective layer 33 is covered on the surface of the filter screen, so that the composite filter screen 3 is formed, formaldehyde can be efficiently removed, and meanwhile, peculiar smell in the environment in a vehicle can be adsorbed.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a compound filter screen assembly, includes first casing (1), second casing (2) and is fixed in filter screen (3) between the two, its characterized in that: the filter screen (3) is folded layer by layer in the circumferential direction and is annular as a whole; the filter screen (3) comprises a supporting layer (31), a filter layer (32) and a protective layer (33) which are sequentially stacked.

2. The composite filter screen assembly of claim 1, wherein: the folding angle of filter screen (3) divide into wind contained angle (301) and air-out contained angle (302), and the wind contained angle (301) is outside towards the ring, and air-out contained angle (302) is inboard towards the ring, and it is inboard that filtering gas flows to the ring by the ring outside.

3. The composite filter screen assembly of claim 2, wherein: the angle range of the air inlet included angle (301) is 4.5-6.5 degrees, and the size of the air inlet included angle (301) is twice that of the air outlet included angle (302).

4. The composite filter screen assembly of claim 1, wherein: the filter screen (3) is an unclosed ring, and an opening of the ring is clamped and fixed on the first shell (1) and the second shell (2).

5. The composite filter screen assembly of claim 1, wherein: the supporting layer (31) and the protective layer (33) are both high-efficiency filter paper.

6. The composite filter screen assembly of claim 5, wherein: the support layer (31) is PET high-efficiency filter paper or PET/PP composite high-efficiency filter paper.

7. The composite filter screen assembly of claim 5, wherein: the protective layer (33) is PP high-efficiency filter paper.

8. A composite filter screen assembly according to any one of claims 1 to 7, wherein: the filter layer (32) is silica particles.

9. The composite filter screen assembly of claim 8, wherein: the filter layer (32) is mixed with columnar activated carbon particles.

10. The composite filter screen assembly of claim 9, wherein: the columnar activated carbon particles are crushed carbon particles or elliptical shell carbon particles.