Air cavity structure and air filter

Abstract

The invention discloses an air cavity structure and an air filter, the air cavity structure comprises: an air cavity main body, two opposite sides of the air cavity main body are provided with an air inlet and a first air outlet; a filter; the side, close to the air inlet, of the filtering piece is connected with the inner wall face of the air cavity body through the first connecting piece; the side, close to the first air outlet, of the filtering piece is connected with the inner wall face of the air cavity body through the second connecting piece. Negative pressure is formed at the second air outlet; when the joint of the first connecting piece and the filtering piece and / or the inner wall face of the air cavity body is loosened, air is exhausted from the second air outlet. The filtering piece is connected with the air cavity body through the first connecting piece and the second connecting piece, when any connecting position is loosened, unfiltered gas or filtered gas can be exhausted through the second air outlet, the unfiltered gas and the filtered gas cannot flow out in a mixed mode, and the filtering efficiency of the filtering piece is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of environmental control, in particular to an air cavity structure and an air filter. Background Art

[0002] In some environmental control fields or scenarios where air filters are used, in order to ensure the filtering effect of the filter, it is necessary to ensure that the filter is in good sealing condition when installed. In the process of realizing the invention, the inventor found that the prior art has at least the following problems: the sealing of the existing filter is basically achieved by rubber strips, and the compression and sealing of the rubber strips must be ensured during installation. The operating accuracy requirements for installing the filter element are relatively high, and the rubber strips often cannot perfectly achieve the compression of all sealing surfaces, resulting in poor filtering effect of the filter element. Summary of the invention

[0003] The purpose of the present invention is to provide an air cavity structure and an air filter to solve the problem that when any connection between the first connecting member and the filter element and / or the inner wall surface of the air cavity body becomes loose, unfiltered gas and filtered gas mix and flow out, making the filtering effect of the filter element worse.

[0004] In a first aspect, the present invention provides an air cavity structure, comprising:

[0005] An air cavity body, wherein an air inlet and a first air outlet are provided on opposite sides of the air cavity body;

[0006] A filter element, disposed in the air cavity body, for filtering gas;

[0007] A first connecting member, wherein opposite ends of the filter member on a side close to the air inlet are connected to the inner wall surface of the air cavity body through the first connecting member;

[0008] A second connecting member, wherein opposite ends of the filter member on a side close to the first air outlet are connected to the inner wall surface of the air cavity body through the second connecting member;

[0009] A second air outlet, the second air outlet comprises at least one, the at least one second air outlet is located on the side wall of the air cavity body between the first connecting member and the second connecting member, and a negative pressure is formed at the second air outlet;

[0010] in:

[0011] When the connection between the first connecting member and the filter member and / or the inner wall surface of the air cavity body is loosened, the gas is discharged from the second gas outlet.

[0012] A wind cavity structure as described above, wherein, preferably, the filter element can move along a preset path, and when the filter element is located at the starting end of the preset path, the filter element is only connected to the first connecting member, and when the filter element is located at the end of the preset path, the opposite sides of the filter element are respectively connected to the first connecting member and the second connecting member.

[0013] In the wind cavity structure as described above, preferably, when the filter element moves along the preset path, the first connecting element moves synchronously.

[0014] In the wind cavity structure as described above, preferably, the first connecting member is made of a flexible sealing material.

[0015] In the air cavity structure as described above, preferably, sealing surfaces are provided on two opposite side walls of the air cavity body close to the first air outlet, and the second connecting member is provided on the sealing surfaces.

[0016] In the wind cavity structure as described above, preferably, the second connecting member is a sealing member, and the sealing member is used to seal the filter member to the sealing surface.

[0017] In the air cavity structure as described above, preferably, the sealing member is a sealing strip.

[0018] In the air cavity structure as described above, preferably, the second air outlet includes one, and the second air outlet is arranged on the side wall of the air cavity body between the sealing surface and the first connecting member on the same side.

[0019] In the wind cavity structure as described above, preferably, the filter element is a filter element of an air filter.

[0020] In a second aspect, the present invention provides an air filter, comprising the aforementioned air cavity structure.

[0021] Compared with the prior art, the wind cavity structure of the present invention arranges the filter element in the wind cavity main body, and the opposite sides of the filter element are connected to the wind cavity main body through the first connecting member and the second connecting member respectively. When any connection between the first connecting member and the filter element and / or the inner wall surface of the wind cavity main body becomes loose and leaks, the unfiltered gas or the filtered gas will be discharged through the second air outlet with lower air pressure, so that the unfiltered gas will not mix with the filtered gas and flow out, thereby further improving the filtering efficiency of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a structural schematic diagram of the wind cavity structure when the filter element provided by an embodiment of the present invention is located at the starting end of a preset path;

[0023] Figure 2 It is a structural schematic diagram of the wind cavity structure when the filter element provided by an embodiment of the present invention is located at the end of a preset path.

[0024] Description of reference numerals:

[0025] 10-wind chamber body, 11-air inlet, 12-first air outlet, 13-second air outlet, 14-unfiltered area, 15-filtered area;

[0026] 20- filter element;

[0027] 30- first connecting member;

[0028] 40- Second connecting member. DETAILED DESCRIPTION

[0029] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but should not be construed as limiting the present invention.

[0030] In a first aspect, the present invention provides an air cavity structure, comprising an air cavity body 10, a filter element 20, a first connecting element 30, a second connecting element 40 and a second air outlet 13, wherein:

[0031] An air inlet 11 and a first air outlet 12 are provided on opposite sides of the air cavity body 10, and a filter 20 is provided in the air cavity body 10. Gas enters the air cavity body 10 from the air inlet 11, is filtered by the filter 20, and is discharged from the first air outlet 12. The filter 20 is preferably a filter element of an air filter, which is suitable for filtering and purifying air.

[0032] The first connecting member 30 includes two, and the two first connecting members 30 are respectively connected to the opposite ends of the filter element 20 near the air inlet 11, thereby connecting the side of the filter element 20 near the air inlet 11 to the air cavity body 10. The second connecting member 40 includes two, and the two second connecting members 40 respectively connect the opposite ends of the filter element 20 near the first air outlet 12 to the air cavity body 10. When the first connecting member 30 and the second connecting member 40 have good sealing properties with the filter element 20 and the air cavity body 10 respectively, the gas enters the filter element 20 from the air inlet 11, and is discharged from the first air outlet 12 after being filtered, thereby having a good filtering effect.

[0033] When any one or more connection points between the first connecting member 30 or the second connecting member 40 and the filter element 20 and / or the air chamber body 10 become loose, the gas will flow to the connection point (or leakage point), bypass or avoid the filter element 20, and be discharged directly from the first air outlet 12, thereby causing the filtering effect to deteriorate. In order to solve this problem, at least one second air outlet 13 is provided on the inner wall of the air cavity main body 10, and the second air outlet 13 is located between the first connecting member 30 and the second connecting member 40 of the corresponding side wall, and a negative pressure is formed at the second air outlet 13. In a feasible implementation mode, a negative pressure device is connected to the second air outlet 13. Compared with the air inlet 11 and the first air outlet 12, the air pressure at the second air outlet 13 is the smallest, and the gas will flow from the high-pressure area to the low-pressure area. When a leakage point occurs between the first connecting member 30 and the filter element 20 or the air cavity main body 10, the unfiltered gas is directly discharged from the second air outlet 13. When a leakage point occurs between the second connecting member 40 and the filter element 20 or the air cavity main body 10, part of the gas filtered by the filter element 20 can be discharged from the second air outlet 13. Therefore, the gas not filtered by the filter element 20 cannot be discharged from the first air outlet 12, and the unfiltered gas will not pollute the filtered gas, thereby not affecting the filtering effect.

[0034] In other embodiments, when the outside air pressure is lower than the air pressure at the air inlet 11 and the first air outlet 12, the second air outlet 13 may also be directly connected to the outside air, which is selected according to actual conditions and is not limited here.

[0035] Preferably, a second air outlet 13 is provided, which is arranged on the side wall of the air cavity body 10 and is located between the first connecting member 30 and the second connecting member 40 on the same side wall. When a leakage point occurs, the gas is discharged from the second air outlet 13. On the one hand, the filtering effect of the filter element 20 is ensured, and on the other hand, the air cavity structure can be simplified.

[0036] In the embodiment provided in the present application, the filter element 20 can move along a preset path, which is a path moving along the line connecting the air inlet 11 and the first air outlet 12. Figure 1 As shown, when the filter element 20 is located at the starting end of the preset path, only the two opposite ends of the filter element 20 close to the air inlet 11 are connected to the first connecting member 30, and the other side of the filter element 20 is not connected to the second connecting member 40. Figure 2As shown, when the filter element 20 is located at the end of the preset path, the two opposite sides of the filter element 20 are connected to the air chamber body 10 through the first connecting member 30 and the second connecting member 40 respectively, so as to separate the inside of the air chamber body 10 into an unfiltered area 14 and a filtered area 15. The unfiltered area 14 and the filtered area 15 are completely isolated from each other under the action of the first connecting member 30 and the second connecting member 40, and the gas in the unfiltered area 14 can enter the filtered area 15 only after being filtered by the filter element 20. When gas leakage occurs at the connection point between the first connecting member 30 or the second connecting member 40 and the filter element 20 and the connection point between the first connecting member 30 and the inner wall of the air chamber body 10 (the position of the dotted circle in the figure), the unfiltered gas and part of the filtered gas will be discharged from the second gas outlet 13 along the direction of the solid arrow in the figure, thereby avoiding the situation where the unfiltered gas and the filtered gas are mixed and discharged from the first gas outlet 12, thereby improving the filtering effect of the filter element 20.

[0037] Before the second connecting member 40 is connected to the filter element 20, there is a certain distance between the filter element 20 and the second connecting member 40. When the filter element 20 and the second connecting member 40 are connected to close the air cavity main body 10 from the outside, in order to ensure the sealing of the unfiltered area 14, the first connecting member 30 needs to remain connected to the filter element 20. When the filter element 20 moves along a preset path, the first connecting member 30 will move synchronously with the movement of the filter element 20.

[0038] Preferably, the first connector 30 is made of a flexible sealing material, which is capable of maintaining good sealing performance while having a certain elasticity or stretchable deformation ability. During the movement of the filter element 20, the first connector 30 made of the flexible material moves to the air inlet surface of the filter element 20 to form a seal, so the first connector 30 can move synchronously with the movement of the filter element 20 along the preset path, thereby maintaining good sealing between the first connector 30 and the filter element 20 and the air chamber body 10. The first connector 30 can be selected according to the filtering requirements and is not limited here.

[0039] In the embodiment provided in the present application, sealing surfaces are provided on the opposite side walls of the air cavity main body 10 near the first air outlet 12, and the sealing surfaces extend from the side walls of the air cavity main body 10 to the interior of the air cavity main body 10. The second connecting member 40 is provided on the side of the sealing surface facing the filter element 20. When the filter element 20 moves to the end of the preset path, it is connected to the sealing surface through the second connecting member 40.

[0040] In a feasible implementation, the second connecting member 40 is a sealing member, which can not only connect the filter element 20 to the sealing surface, but also seal the connection between the filter element 20 and the sealing surface, thereby preventing leakage. Preferably, the sealing member is a sealing rubber strip, and the side of the filter element 20 close to the air outlet is sealed and connected to the sealing surface by the viscosity of the sealing rubber strip, thereby sealing the filter area 15.

[0041] In other embodiments, the sealing element may be other structures or components that can both connect the filter element 20 to the air cavity body 10 and seal the filter area 15, which is not limited here.

[0042] In a second aspect, the present invention provides an air filter, comprising the aforementioned wind cavity structure. The air filter having the wind cavity structure of the present application has a good filtering effect, and even if a leakage point occurs in the wind cavity body 10, it will not affect the filtering effect of the air filter.

[0043] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. A wind cavity structure, characterized in that: include: An air cavity body, wherein an air inlet and a first air outlet are provided on opposite sides of the air cavity body; A filter element, disposed in the air cavity body, for filtering gas; A first connecting member, wherein opposite ends of the filter member on a side close to the air inlet are connected to the inner wall surface of the air cavity body through the first connecting member; A second connecting member, wherein opposite ends of the filter member on a side close to the first air outlet are connected to the inner wall surface of the air cavity body through the second connecting member; A second air outlet, the second air outlet comprises at least one, the at least one second air outlet is located on the side wall of the air cavity body between the first connecting member and the second connecting member, and a negative pressure is formed at the second air outlet; in: When the connection between the first connecting member and the filter member and / or the inner wall surface of the air cavity body is loosened, the gas is discharged from the second gas outlet.

2. The air cavity structure according to claim 1, characterized in that: The filter element can move along a preset path. When the filter element is located at the starting end of the preset path, the filter element is only connected to the first connecting member. When the filter element is located at the end of the preset path, the opposite sides of the filter element are respectively connected to the first connecting member and the second connecting member.

3. The air cavity structure according to claim 2, characterized in that: When the filter element moves along the preset path, the first connecting element moves synchronously.

4. The air cavity structure according to claim 3, characterized in that: The first connecting member is made of a flexible sealing material.

5. The air cavity structure according to claim 1, characterized in that: The wind cavity main body is provided with sealing surfaces on two opposite side walls close to the first air outlet, and the second connecting member is provided on the sealing surfaces.

6. The air cavity structure according to claim 5, characterized in that: The second connecting member is a sealing member, and the sealing member is used to seal the filter element to the sealing surface.

7. The air cavity structure according to claim 6, characterized in that: The sealing member is a sealing rubber strip.

8. The air cavity structure according to claim 1, characterized in that: The second air outlet includes one, and the second air outlet is arranged on the side wall of the air cavity body between the sealing surface and the first connecting member on the same side.

9. The air cavity structure according to claim 1, characterized in that: The filter element is a filter element of an air filter.

10. An air filter, characterized in that: The wind cavity structure comprises the wind cavity structure as described in any one of claims 1 to 9.

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