Air filter

Abstract

The utility model relates to the technical field of air filtration, and discloses an air filter which comprises a shell and a filter structure, the shell is provided with an air flow channel, the filter structure is arranged on the shell and located at an air inlet of the air flow channel, and a first filter element and a second filter element which are sequentially arranged are arranged in the air flow channel. The first filter element is located between the filtering structure and the second filter element, the filtering structure is used for separating physical impurities in air, the first filter element is used for filtering the physical impurities in the air, and the second filter element is used for filtering harmful gas in the air. In the air filter, air needs to pass through the filtering structure to separate out physical impurities, then pass through the first filter element to filter away the physical impurities and finally pass through the second filter element to filter away harmful gas, and the filtering structure and the first filter element can intercept the physical impurities, so that the second filter element does not need to undertake excessive physical impurity filtering work; the workload of the second filter element can be reduced, the service life of the second filter element is prolonged, and the maintenance frequency of the second filter element is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air filtration, in particular to an air filter. Background Art

[0002] When the air pipeline of the fuel cell system takes air from the air, impurity particles and harmful gases in the air will enter the air pipeline. If the particles and harmful gases are allowed to enter the fuel cell stack, the flow channel will be blocked and the service life of the fuel cell stack will be reduced. Therefore, an air filter is required to filter out these particles and harmful gases. In the related art, the air filter includes a shell and a filter element. The shell has an air flow channel, and the filter element is arranged in the air flow channel. The shell also has a filtering structure. The filtering structure is located at the inlet of the air flow channel. The filtering structure usually throws the heavier dust in the dust-containing air to the surroundings through the principle of high-speed centrifugation to reduce the amount of dust. The filter element plays a chemical filtering role in filtering harmful gases to the fuel cell. However, the air filter of this structure filters dust through the filtering structure, and the dust filtering efficiency is low. The dust content of the air entering the filter element is high, and the dust burden on the filter element is large, which further increases the workload of the filter element, shortens the working life of the filter element, and increases the replacement frequency of the filter element. Utility Model Content

[0003] The utility model aims to prolong the working life of a filter element for filtering harmful gases.

[0004] In order to achieve the above-mentioned purpose, the utility model provides an air filter, including a shell and a filtering structure, the shell having an air flow channel, the filtering structure being arranged on the shell and located at the air inlet of the air flow channel, the air flow channel being provided with a first filter element and a second filter element arranged in sequence, the first filter element being located between the filtering structure and the second filter element, the filtering structure being used to separate physical impurities in the air, the first filter element being used to filter physical impurities in the air, and the second filter element being used to filter harmful gases in the air.

[0005] In a specific embodiment of the present invention, the first filter element is a three-dimensional mesh structure, one opening of the mesh faces the filtering structure, and the other opening faces the second filter element.

[0006] In a specific embodiment of the present invention, the second filter element is a filter element made of MOF material or activated carbon material.

[0007] In a specific embodiment of the utility model, the filtering structure includes a filter shell and a dust exhaust valve, the filter shell is connected to the shell, and the filter shell is arranged at the air inlet of the air flow channel, the filter shell is provided with an air inlet duct at the end away from the shell, and an air outlet duct is provided at the end close to the shell, and a dust exhaust port is provided at the bottom of the filter shell, the air inlet duct, the air outlet duct and the dust exhaust port are all connected to the filter shell, the air inlet duct has a spiral air inlet, and the dust exhaust valve is connected to the dust exhaust port.

[0008] In a specific embodiment of the utility model, the filter shell has a plurality of conical protrusions, the protrusions are located on the inner wall of the filter shell facing away from the housing, and the smaller ends of the protrusions are away from the housing, and each of the protrusions is provided with the air outlet duct;

[0009] There are multiple air intake ducts, and the multiple air intake ducts correspond to the multiple protrusions one by one. The protrusions extend into the corresponding air intake ducts, and there is a distance between the outer peripheral wall of the protrusion and the inner wall of the air intake duct.

[0010] In a specific embodiment of the present invention, the dust exhaust valve is a duckbill valve.

[0011] In a specific embodiment of the utility model, the shell body includes a shell body, a first cover body and a second cover body, the top of the shell body is provided with a first opening and a second opening, the first cover body is detachably connected to the shell body and covers the first opening, the second cover body is detachably connected to the shell body and covers the second opening, the shell body, the first cover body and the second cover body define the air flow channel, the first filter element and the second filter element are both detachably connected to the shell body, the first cover body is correspondingly arranged to the first filter element, and the second cover body is correspondingly arranged to the second filter element.

[0012] In a specific embodiment of the present invention, the first opening and the second opening are connected to each other, and the first cover body and the second cover body are detachably connected.

[0013] In a specific embodiment of the present invention, a third filter element is further included. The third filter element is arranged in the air flow channel, and the third filter element is located on a side of the second filter element away from the first filter element.

[0014] In a specific embodiment of the present invention, the third filter element has a handle, and the handle is located on the side of the third filter element facing the second filter element.

[0015] The utility model provides an air filter, which has the following beneficial effects compared with the prior art:

[0016] The air filter of the embodiment of the utility model has a filtering structure for separating physical impurities in the air, a first filter element for filtering physical impurities in the air, and a second filter element for filtering harmful gases in the air. The filtering structure is arranged at the air inlet of the air flow channel, and the first filter element is arranged between the filtering structure and the second filter element. Based on this, in the air filter, the air needs to first pass through the filtering structure to separate the physical impurities, and then pass through the first filter element to filter out the physical impurities, and finally pass through the second filter element to filter out the harmful gases. Since the filtering structure and the first filter element can both intercept physical impurities, the second filter element does not need to bear too much physical impurity filtering work, which can reduce the workload of the second filter element, extend the working life of the second filter element, and reduce the maintenance frequency of the second filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of an air filter according to an embodiment of the utility model;

[0018] Figure 2 It is an exploded schematic diagram of an air filter according to an embodiment of the utility model;

[0019] Figure 3 This is a structural diagram of the air filter of the utility model embodiment without the second cover body and the second filter element;

[0020] Figure 4 It is a cross-sectional structural diagram of the filtering structure of an embodiment of the utility model.

[0021] In the figure, 1. shell; 100. air flow channel; 11. shell body; 12. first cover body; 13. second cover body; 2. filtering structure; 201. air inlet duct; 202. air outlet duct; 21. filter shell; 211. raised part; 22. dust exhaust valve; 3. first filter element; 4. second filter element; 5. third filter element; 51. handle. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] In the description of the present invention, it should be understood that physical impurities refer to solid particles such as dust, and harmful gases refer to SO2, NO X (nitrogen oxides), NH3 and other gases that are harmful to fuel cells.

[0024] like Figure 1-4As shown, an air filter of an embodiment of the utility model includes a shell 1 and a filtering structure 2, the shell 1 has an air flow channel 100, the filtering structure 2 is arranged on the shell 1 and is located at the air inlet of the air flow channel 100, and a first filter element 3 and a second filter element 4 arranged in sequence are provided in the air flow channel 100, the first filter element 3 is located between the filtering structure 2 and the second filter element 4, the filtering structure 2 is used to separate physical impurities in the air, the first filter element 3 is used to filter physical impurities in the air, and the second filter element 4 is used to filter harmful gases in the air.

[0025] Based on the above structure, in the air filter, the air needs to first pass through the filter structure 2 to separate the physical impurities, then pass through the first filter element 3 to filter out the physical impurities, and finally pass through the second filter element 4 to filter out the harmful gases. Since the filter structure 2 and the first filter element 3 can both intercept physical impurities, the second filter element 4 does not need to bear too much physical impurity filtering work, which can reduce the workload of the second filter element 4, extend the working life of the second filter element 4 and reduce the maintenance frequency of the second filter element 4.

[0026] In this embodiment, the first filter element 3 is a three-dimensional mesh structure, one opening of the mesh faces the filter structure 2, and the other opening faces the second filter element 4. Moreover, the first filter element 3 is a paper structure and has a certain length. Under this structure, physical impurities in the air can be effectively filtered.

[0027] In this embodiment, the second filter element 4 is a filter element made of MOF material or activated carbon material. Specifically, MOF material or activated carbon material can effectively filter harmful gases in the air, and can also filter physical impurities such as dust, with good filtering effect; wherein, MOF material refers to metal organic framework material, which is a new type of organic metal composite material with high porosity.

[0028] In this embodiment, the filter structure 2 includes a filter shell 21 and a dust exhaust valve 22. The filter shell 21 is connected to the housing 1, and the filter shell 21 is arranged at the air inlet of the air flow channel 100. The end of the filter shell 21 away from the housing 1 is provided with an air inlet duct 201, and the end close to the housing 1 is provided with an air outlet duct 202. The bottom of the filter shell 21 is provided with a dust exhaust port. The air inlet duct 201, the air outlet duct 202, and the dust exhaust port are all connected to the filter shell 21. The air inlet duct 201 has a spiral air inlet portion, and the dust exhaust valve 22 is connected to the dust exhaust port. In actual applications, the air will form a rotating airflow under the action of the spiral air inlet portion, and the physical impurities in it will be thrown around, based on which the air and physical impurities are separated. When the separated physical medium accumulates to a certain extent, the dust exhaust valve 22 can be opened to discharge the physical medium from the dust exhaust port.

[0029] Furthermore, the filter housing 21 has a plurality of conical protrusions 211, which are located on the inner wall of the filter housing 21 facing away from the housing 1, and the smaller end of the protrusion 211 is away from the housing 1, and each protrusion 211 is provided with an air outlet channel; wherein, the air inlet duct 201 is provided with a plurality of protrusions 211, and the plurality of air inlet ducts 201 correspond to the plurality of protrusions 211 one by one, and the protrusions 211 extend into the corresponding air inlet duct 201, and there is a distance between the outer peripheral wall of the protrusion 211 and the inner wall of the air inlet duct 201, based on which, the protrusion 211 and the air inlet duct 201 are spaced apart from each other. A channel is formed between the inner walls of the air inlet duct 201 for discharging physical impurities from the air inlet duct 201, and the separated physical impurities enter the filter shell 21 from the channel under the action of air; and the advantage of the raised portion 211 extending to the air inlet duct 201 is that most of the air will enter the shell 1 along the air inlet duct 201 and the air outlet duct 202, and will not enter the filter shell 21. At this time, the air will not lift up the physical impurities in the filter shell 21, and the separated physical impurities can be prevented from entering the shell 1 with the air.

[0030] As a preferred embodiment of the present invention, the dust exhaust valve 22 is a duckbill valve, which is made of rubber. Physical impurities can be discharged by simply pressing the outer wall of the duckbill valve to deform it and open its opening. It has a simple structure and is easy to operate.

[0031] In this embodiment, the housing 1 includes a housing body 11, a first cover body 12 and a second cover body 13. The top of the housing body 11 is provided with a first opening and a second opening. The first cover body 12 is detachably connected to the housing body 11 and covers the first opening. The second cover body 13 is detachably connected to the housing body 11 and covers the second opening. The housing body 11, the first cover body 12 and the second cover body 13 define an air flow channel 100. The first filter element 3 and the second filter element 4 are both detachably connected to the housing body 11. The first cover body 12 is correspondingly arranged with the first filter element 3, and the second cover body 13 is correspondingly arranged with the second filter element 4. The housing 1 of this structure has the advantage that when the first filter element 3 and / or the second filter element 4 need to be maintained or replaced, it is only necessary to open the first cover body 12 and / or the second cover body 13, and then remove or install the first filter element 3 and / or the second filter element 4 from the first opening and / or the second opening, which is convenient to operate.

[0032] Furthermore, the first opening and the second opening are connected to each other, and the first cover body 12 and the second cover body 13 can be detachably connected. Under this structure, there is no shell body 11 between the first opening and the second opening, which can make the installation and disassembly of the first filter element 3 and / or the second filter element 4 more convenient.

[0033] As a specific implementation of this embodiment, the detachable connection between the first cover body 12, the second cover body 13 and the shell body 11, and the detachable connection between the first cover body 12 and the second cover body 13 are all achieved by snap-fit ​​connection. Figure 1 The figure shows a quick clamp. The first cover body 12 is provided with quick clamps on both sides of its length direction and at both ends of its length direction. The second cover body 13 is provided with quick clamps on both sides of its length direction and at one end away from the first cover body 12 in the length direction.

[0034] In this embodiment, the air filter also includes a third filter element 5, which is arranged in the air flow channel 100, and the third filter element 5 is located on the side of the second filter element 4 away from the first filter element 3. Specifically, the third filter element 5 is a paper filter element. The advantage of providing the third filter element 5 is that when maintaining or replacing the second filter element 4, the third filter element 5 can prevent physical impurities from being directly output from the air outlet of the air flow channel 100, that is, the third filter element 5 plays a role of safety protection and can prevent physical impurities from entering the fuel cell system.

[0035] As a preference of this embodiment, the third filter element 5 has a handle 51, which is located on the side of the third filter element 5 facing the second filter element 4. Based on this, when the third filter element 5 needs maintenance or replacement, the second cover 13 can be opened and the second filter element 4 can be taken out. Thereafter, the handle 51 can be grasped to pull the third filter element 5 to the position of the second opening of the air flow channel 100 corresponding to the third filter element 5, and then the third filter element 5 can be taken out from the second opening, which is easy to operate.

[0036] In this embodiment, the outer peripheral walls of the first filter element 3, the second filter element 4 and the third filter element 5 are all sealed and connected to the inner wall of the air flow channel 100 to ensure the filtering effect.

[0037] In addition, the outer wall of the housing 1 is also provided with a U-shaped clamp fixing seat. In actual application, the air filter can be installed to the use position through the U-shaped clamp and bolts. The housing 1 is also provided with a mounting screw hole, which is arranged on the same side as the air outlet of the air flow channel 100. A barometer or an air pressure indicator can be installed through the mounting screw hole to monitor the air pressure inside the air filter when it delivers air.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An air filter, characterized in that: The invention comprises a shell (1) and a filter structure (2), wherein the shell (1) has an air flow channel (100), the filter structure (2) is arranged on the shell (1) and located at the air inlet of the air flow channel (100), and a first filter element (3) and a second filter element (4) arranged in sequence are arranged in the air flow channel (100), the first filter element (3) is located between the filter structure (2) and the second filter element (4), the filter structure (2) is used to separate physical impurities in the air, the first filter element (3) is used to filter physical impurities in the air, and the second filter element (4) is used to filter harmful gases in the air.

2. The air filter according to claim 1, characterized in that The first filter element (3) is a three-dimensional mesh structure, one opening of the mesh faces the filter structure (2), and the other opening faces the second filter element (4).

3. The air filter according to claim 1, characterized in that The second filter element (4) is a filter element made of MOF material or activated carbon material.

4. The air filter according to claim 1, characterized in that The filtering structure (2) comprises a filtering shell (21) and a dust exhaust valve (22); the filtering shell (21) is connected to the shell (1), and the filtering shell (21) is arranged at the air inlet of the air flow channel (100); an end of the filtering shell (21) away from the shell (1) is provided with an air inlet duct (201), and an end close to the shell (1) is provided with an air outlet duct (202); a dust exhaust port is provided at the bottom of the filtering shell (21); the air inlet duct (201), the air outlet duct (202) and the dust exhaust port are all connected to the filtering shell (21); the air inlet duct (201) has a spiral air inlet portion, and the dust exhaust valve (22) is connected to the dust exhaust port.

5. The air filter according to claim 4, characterized in that The filter shell (21) has a plurality of conical protrusions (211), the protrusions (211) are located on the inner wall of the filter shell (21) facing away from the housing (1), and the smaller ends of the protrusions (211) are away from the housing (1), and each of the protrusions (211) is provided with the air outlet duct (202); There are multiple air intake ducts (201), and the multiple air intake ducts (201) correspond one-to-one to the multiple protrusions (211), and the protrusions (211) extend into the corresponding air intake ducts (201), and there is a distance between the outer peripheral wall of the protrusion (211) and the inner wall of the air intake duct (201).

6. The air filter according to claim 4, characterized in that The dust exhaust valve (22) is a duckbill valve.

7. The air filter according to claim 1, characterized in that The shell (1) comprises a shell body (11), a first cover body (12) and a second cover body (13); a first opening and a second opening are provided on the top of the shell body (11); the first cover body (12) is detachably connected to the shell body (11) and covers the first opening; the second cover body (13) is detachably connected to the shell body (11) and covers the second opening; the shell body (11), the first cover body (12) and the second cover body (13) define the air flow channel (100); the first filter element (3) and the second filter element (4) are both detachably connected to the shell body (11); the first cover body (12) is correspondingly arranged to the first filter element (3); and the second cover body (13) is correspondingly arranged to the second filter element (4).

8. The air filter according to claim 7, characterized in that The first opening and the second opening are connected to each other, and the first cover body (12) and the second cover body (13) are detachably connected.

9. The air filter according to claim 7, characterized in that It also includes a third filter element (5), which is arranged in the air flow channel (100), and the third filter element (5) is located on a side of the second filter element (4) away from the first filter element (3).

10. The air filter according to claim 9, characterized in that The third filter element (5) has a handle (51), and the handle (51) is located on the side of the third filter element (5) facing the second filter element (4).

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