A cathode air filter suitable for hydrogen fuel cells

Abstract

The present invention relates to a cathode air filter suitable for a hydrogen fuel cell, comprising a dual filter assembly, an impurity removal and resistance reduction assembly, and a filter intelligent controller. The dual filter assembly comprises a chemical filter box, the bottom end of the chemical filter box is connected to a connecting pipe, and a chemical adsorption filter element is arranged in the chemical filter box. Under the joint action of the dual filter assembly, the impurity removal and resistance reduction assembly, and the filter intelligent controller, each time the air intake system of the hydrogen fuel cell draws air, the impurity removal and resistance reduction assembly can, under the action of the suction force provided by the air intake system, clean the impurity particles filtered out and intercepted on the filter net to prevent the air intake resistance from further increasing due to the clogging of the filter net by the impurity particles. After a short cleaning, the physical filter tube will automatically conduct, so that the air intake system can smoothly draw air, thereby effectively reducing the air intake resistance when the air intake system draws air, and further indirectly improving the power generation efficiency of the hydrogen fuel cell.

Description

Technical Field

[0001] The invention relates to a filter, in particular to a cathode air filter suitable for hydrogen fuel cells in the field of hydrogen fuel cells. Background Art

[0002] A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. Its basic principle is the reverse reaction of water electrolysis. Hydrogen and oxygen are supplied to the anode and cathode respectively. After hydrogen diffuses outward through the anode and reacts with the electrolyte, it releases electrons and reaches the cathode through an external load. Hydrogen fuel cells have the advantages of no pollution, no noise, and high efficiency.

[0003] At present, common hydrogen fuel cells usually use air as an oxidant, but impurity particles and harmful gases in the air (such as H 2 S. SO 2 , CO, etc.) will affect the performance of the fuel cell and reduce the service life of the fuel cell. Therefore, it is necessary to set an air filter in the fuel cell's air intake system to eliminate the impact of impurity particles and harmful gases in the air on the fuel cell.

[0004] Air filters for hydrogen fuel cells usually require two layers of filtering structures, one layer is a filter net, which is used to filter impurity particles in the air, and the other layer is a chemical adsorption filter element, which is used to remove harmful gases in the air. Setting up an air filter will increase the intake resistance of the fuel cell intake system. The impurity particles intercepted and filtered by the filter net will cause the filter net to be blocked, resulting in further increase in intake resistance, which is easy to affect the power generation efficiency of the fuel cell. Therefore, we propose a cathode air filter suitable for hydrogen fuel cells. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the impurity particles intercepted and filtered by the filter will cause clogging of the filter, resulting in further increase of the air intake resistance, which is likely to affect the power generation efficiency of the fuel cell.

[0006] In order to solve the above problems, the present invention provides a cathode air filter suitable for a hydrogen fuel cell, comprising a dual filter assembly, an impurity removal and resistance reduction assembly, and a filter intelligent controller. The dual filter assembly comprises a chemical filter box, the bottom end of the chemical filter box is connected to a connecting pipe, a chemical adsorption filter element matching therewith is arranged in the chemical filter box, the top end of the chemical adsorption filter element is connected to a physical filter tube, a filter net matching therewith is arranged in the physical filter tube, the impurity removal and resistance reduction assembly comprises an impurity collecting cylinder, a impurity collecting trapezoidal net matching therewith is arranged in the impurity collecting cylinder, and an adsorption guide is connected on the outer wall of the impurity collecting cylinder on the side close to the chemical filter box Tube, impurity guide tube, the other end of the suction guide tube is connected with the chemical filter box, the other end of the impurity guide tube is connected with the physical filter tube, the suction guide tube is provided with a suction guide solenoid valve, the impurity guide tube is provided with a impurity guide solenoid valve, an elastic diaphragm is embedded and penetrated on the outer wall of one side of the physical filter tube, a valve regulating button is fixedly installed on the inner wall of the other side of the physical filter tube, an upper solenoid valve and a lower solenoid valve are provided on the physical filter tube, a valve control module is provided in the filter intelligent controller, the valve regulating button is signal-connected with the valve control module, and the valve control module is signal-connected with the upper solenoid valve, the lower solenoid valve, the suction guide solenoid valve and the impurity guide solenoid valve.

[0007] In the above-mentioned cathode air filter suitable for hydrogen fuel cells, the impurity particles filtered out from the filter net can be automatically cleaned to prevent the intake resistance from further increasing due to the impurity particles clogging the filter net, thereby effectively reducing the intake resistance when the intake system draws air, and further indirectly improving the power generation efficiency of the hydrogen fuel cell.

[0008] As a further improvement of the present application, the upper solenoid valve and the lower solenoid valve are respectively located on the upper and lower sides of the filter screen, the impurity guide pipe and the suction guide pipe are respectively located on the upper and lower sides of the impurity collecting trapezoidal net, the bottom end of the impurity guide pipe is flush with the top end of the filter screen, the upper solenoid valve and the lower solenoid valve are in a closed state, the suction guide solenoid valve and the impurity guide solenoid valve are in an open state, and the valve adjustment button is a self-resetting button.

[0009] As a further improvement of the present application, an air inlet hole is opened on the outer wall of the physical filter tube, and the air inlet hole is located above the filter mesh. The aperture of the air inlet hole is smaller than the inner diameter of the impurity guide tube, which can extend the time for cleaning impurity particles and thus improve the cleaning effect.

[0010] As a further improvement of the present application, the bottom end of the collecting barrel is arranged to be open, and the bottom end of the collecting barrel is threadedly connected with a matching storage barrel cover, the collecting trapezoidal net is arranged to be a hollow cone shape which is thick at the top and thin at the bottom, a middle blocking column which matches the collecting trapezoidal net is fixedly installed in the middle of the storage barrel cover, a driving spring is fixedly installed on the inner wall of the top end of the collecting barrel, the bottom end of the driving spring is fixedly connected with a driving springboard which is slidingly and sealingly connected to the collecting barrel, and the driving springboard is fixedly connected to the collecting trapezoidal net through a T-shaped rod.

[0011] As a further improvement of the present application, the bottom end of the impurity collecting trapezoidal net is sleeved on the outer wall of the middle blocking column, and the impurity collecting trapezoidal net is slidingly connected to the outer wall of the middle blocking column, and the impurity collecting trapezoidal net is slidingly connected to the inner wall of the impurity collecting tube. The bottom end of the impurity collecting trapezoidal net is 1-5cm lower than the top of the middle blocking column, and the drive springboard is located above the impurity guiding pipe, so that the impurity particles on the inside of the impurity collecting trapezoidal net can be automatically cleaned, thereby further reducing the intake resistance when the intake system draws air.

[0012] As another improvement of the present application, a filter efficiency analysis module and an intelligent reminder module are also provided in the filter intelligent controller. An upper gas sensor and a lower gas sensor are fixedly installed on the inner wall of the chemical filter box. The upper gas sensor and the lower gas sensor are respectively located on the upper and lower sides of the chemical adsorption filter element. The upper gas sensor and the lower gas sensor are both connected to the filter efficiency analysis module signal, and the filter efficiency analysis module is connected to the intelligent reminder module signal.

[0013] As another improvement supplement to the present application, the chemical adsorption filter element is movably connected to the inner wall of the chemical filter box, and one end of the chemical adsorption filter element is detachably fixedly connected with a matching core changing sealing handle, which passes through the outer wall of the chemical filter box and is slidingly and sealingly connected to the outer wall of the chemical filter box, which can prompt relevant personnel to replace or maintain the chemical adsorption filter element in time and improve the filtering effect of the filter.

[0014] In summary, the present application adopts the arrangement of dual filter components, impurity removal and resistance reduction components, and filter intelligent controller, so that each time the intake system of the hydrogen fuel cell draws air, the impurity removal and resistance reduction components can clean the impurity particles that are filtered out and intercepted on the filter net under the action of the suction force provided by the intake system, so as to prevent the intake resistance from further increasing due to the clogging of the filter net by impurity particles, and after a short cleaning, the physical filter tube will automatically conduct, so that the intake system can smoothly extract air, thereby effectively reducing the intake resistance when the intake system draws air, and further indirectly improving the power generation efficiency of the hydrogen fuel cell; through the connection of the middle blocking column, spring, drive springboard, etc. The combined setting can automatically clean the impurity particles on the inside of the collecting trapezoidal net, thereby preventing the impurity particles from clogging the collecting trapezoidal net and affecting the cleaning effect of the filter, thereby effectively improving the cleaning effect of the filter, and further reducing the intake resistance when the intake system draws air, and improving the practicality of the filter; through the joint setting of the core replacement sealing handle, the upper gas sensor, the lower gas sensor, etc., when the filtering effect of the chemical adsorption filter element is greatly reduced and needs to be replaced, the intelligent reminder module will send a reminder to the relevant personnel, prompting the relevant personnel to replace or maintain the chemical adsorption filter element in time, thereby improving the filtering effect of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a schematic diagram of the three-dimensional structure of a cathode air filter suitable for a hydrogen fuel cell in the first embodiment of the present application;

[0016] Figure 2 This is a front view structural schematic diagram of a cathode air filter suitable for a hydrogen fuel cell in the first embodiment of the present application;

[0017] Figure 3 This is a schematic cross-sectional view of the chemical filter box in the first embodiment of the present application;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the physical filter tube in the first embodiment of the present application;

[0019] Figure 5 This is a schematic cross-sectional view of the structure of the miscellaneous barrel in the first embodiment of the present application;

[0020] Figure 6 This is a system structure block diagram of the filtering intelligent controller in the first embodiment of the present application;

[0021] Figure 7 This is a front view structural schematic diagram of a cathode air filter suitable for a hydrogen fuel cell in a second embodiment of the present application;

[0022] Figure 8 This is a schematic cross-sectional view of the chemical filter box in the second embodiment of the present application;

[0023] Fig. 9 This is a system structure block diagram of the filtering intelligent controller in the second embodiment of the present application.

[0024] Description of the numbers in the figure:

[0025] 101. Chemical filter box; 102. Connecting pipe; 103. Chemical adsorption filter element; 104. Physical filter tube; 105. Filter net; 106. Elastic diaphragm; 107. Valve adjustment button; 108. Upper solenoid valve; 109. Lower solenoid valve; 110. Air inlet; 201. Collection cylinder; 202. Collection trapezoidal net; 203. Suction guide tube; 204. Guide tube; 205. Suction guide solenoid valve; 206. Guide solenoid valve; 207. Storage cylinder cover; 208. Middle blocking column; 209. Spring; 210. Drive springboard; 211. T-bar; 003. Filter intelligent controller; 501. Element replacement seal handle; 502. Upper gas sensor; 503. Lower gas sensor. DETAILED DESCRIPTION

[0026] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0027] The first implementation method:

[0028] Figure 1-6 A cathode air filter suitable for a hydrogen fuel cell is shown, comprising a dual filter assembly, a debris removal and resistance reduction assembly, and a filter intelligent controller 003. The dual filter assembly comprises a chemical filter box 101, the bottom end of the chemical filter box 101 is connected to a connecting pipe 102, a chemical adsorption filter element 103 matching therewith is arranged in the chemical filter box 101, the top end of the chemical adsorption filter element 103 is connected to a physical filter tube 104, and a filter screen 105 matching therewith is arranged in the physical filter tube 104 The impurity removal and resistance reduction component includes an impurity collection cylinder 201, in which a matching impurity collection trapezoidal net 202 is arranged, and an outer wall of the impurity collection cylinder 201 close to the chemical filter box 101 is connected with a suction pipe 203 and an impurity guide pipe 204, the other end of the suction pipe 203 is connected to the chemical filter box 101, and the other end of the impurity guide pipe 204 is connected to the physical filter tube 104, and an suction guide electromagnetic valve 205 is arranged on the suction pipe 203, and an impurity guide electromagnetic valve 205 is arranged on the impurity guide pipe 204. The outer wall of one side of the physical filter tube 104 is penetrated and embedded with an elastic diaphragm 106, and the inner wall of the other side of the physical filter tube 104 is fixedly installed with a valve adjustment button 107. The physical filter tube 104 is provided with an upper solenoid valve 108 and a lower solenoid valve 109. The filter intelligent controller 003 is provided with a valve control module. The valve adjustment button 107 is connected to the valve control module signal. The valve control module is connected with the upper solenoid valve 108, the lower solenoid valve 109, the suction solenoid valve 205, The impurity guide solenoid valve 206 is signal connected, the upper solenoid valve 108 and the lower solenoid valve 109 are respectively located on the upper and lower sides of the filter screen 105, the impurity guide pipe 204 and the suction guide pipe 203 are respectively located on the upper and lower sides of the impurity collecting trapezoidal net 202, the bottom end of the impurity guide pipe 204 is flush with the top end of the filter screen 105, the upper solenoid valve 108 and the lower solenoid valve 109 are in the closed state, the suction guide solenoid valve 205 and the impurity guide solenoid valve 206 are in the open state, and the valve adjustment button 107 is a self-resetting button.

[0029] See also Figure 1-6, connect the bottom end of the connecting pipe 102 to the air intake system of the hydrogen fuel cell. When the air intake system draws air, since the upper solenoid valve 108 and the lower solenoid valve 109 are in a closed state, and the suction solenoid valve 205 and the impurity guide solenoid valve 206 are in an open state, under the action of suction, the air in the physical filter tube 104 will flow into the impurity collecting cylinder 201 through the impurity guide pipe 204, and then flow into the chemical filter box 101 through the suction guide pipe 203, so that the impurity particles filtered out of the filter net 105 will be sucked into the impurity collecting cylinder 201 together with the air, and the impurity collecting trapezoidal net 202 will intercept the impurity particles to prevent the impurities from When particles enter the chemical filter box 101, the outflow of air will reduce the air pressure in the physical filter tube 104, causing the elastic diaphragm 106 to sag and deform inward, causing the elastic diaphragm 106 to squeeze and trigger the valve adjustment button 107. At this time, the valve control module will open the upper solenoid valve 108 and the lower solenoid valve 109, and close the suction solenoid valve 205 and the impurity guide solenoid valve 206, so that the physical filter tube 104 is completely conductive, and then the air can be extracted through the physical filter tube 104, the chemical filter box 101, and the connecting tube 102. In the process of extracting air, the filter 105 will filter out impurity particles in the air. , the chemical adsorption filter element 103 can remove harmful gases in the air to eliminate the influence of impurity particles and harmful gases in the air on the hydrogen fuel cell. After the air extraction is completed, the valve control module will close the upper solenoid valve 108 and the lower solenoid valve 109 and reopen the suction solenoid valve 205 and the impurity guide solenoid valve 206 (the valve control module is connected to the air intake system of the hydrogen fuel cell by signal, and the air intake system will send a signal to the valve control module at the end of the air extraction, and the valve control module can automatically close and open the corresponding valve after the air extraction is completed. This is a well-known technology for those skilled in the art and will not be elaborated here). Therefore, By setting up the dual filter components, the impurity removal and resistance reduction components, and the filter intelligent controller 003, each time the hydrogen fuel cell's intake system draws air, the impurity removal and resistance reduction components can clean the impurity particles filtered out and intercepted on the filter 105 under the action of the suction provided by the intake system, to prevent the intake resistance from further increasing due to the impurity particles clogging the filter 105, and after a short cleaning, the physical filter tube 104 will automatically turn on, so that the intake system can smoothly extract air, thereby effectively reducing the intake resistance when the intake system draws air, and further indirectly improving the power generation efficiency of the hydrogen fuel cell.

[0030] See also Figure 4 An air inlet hole 110 is provided on the outer wall of the physical filter tube 104. The air inlet hole 110 is located above the filter screen 105. The aperture of the air inlet hole 110 is smaller than the inner diameter of the impurity guide tube 204. When cleaning the foreign particles on the filter screen 105, the air inlet hole 110 can play a role in replenishing air, which can slightly delay the triggering of the regulating valve button 107, thereby extending the time for cleaning the foreign particles and further improving the cleaning effect.

[0031] See also Figure 5 The bottom end of the collecting cylinder 201 is set to be open, and the bottom end of the collecting cylinder 201 is threadedly connected with a matching storage cylinder cover 207, the collecting cylinder trapezoidal net 202 is set to be a hollow truncated cone with a thick top and a thin bottom, and a middle blocking column 208 matching the collecting cylinder trapezoidal net 202 is fixedly installed in the middle of the storage cylinder cover 207, and a driving spring 209 is fixedly installed on the inner wall of the top of the collecting cylinder 201, and the bottom end of the driving spring 209 is fixedly connected with a sliding sealing connection with the collecting cylinder 201 The driving springboard 210 is connected, and the driving springboard 210 is fixedly connected to the impurity collecting trapezoidal net 202 through a T-shaped rod 211. The bottom end of the impurity collecting trapezoidal net 202 is sleeved on the outer wall of the middle blocking column 208, and the impurity collecting trapezoidal net 202 is slidably connected to the outer wall of the middle blocking column 208, and the impurity collecting trapezoidal net 202 is slidably connected to the inner wall of the impurity collecting cylinder 201. The bottom end of the impurity collecting trapezoidal net 202 is 1-5 cm lower than the top end of the middle blocking column 208, and the driving springboard 210 is located above the impurity guiding pipe 204.

[0032] When cleaning the impurity particles on the filter screen 105 (before the elastic diaphragm 106 triggers the valve regulating button 107), the impurity particles will fall into the inner side of the collecting trapezoidal net 202, and under the action of suction, the driving spring 210 will move downward a certain distance, and the driving spring 209 will be stretched to a certain extent. After the cleaning is completed (the valve regulating button 107 is triggered, the valve control module opens the upper solenoid valve 108 and the lower solenoid valve 109 and closes the suction solenoid valve 205 and the impurity guiding solenoid valve 206), the suction force on the driving spring 210 will be significantly reduced, so that the driving spring 209 will rebound. The rebound of the driving spring 209 will cause the driving spring 210 and the collecting trapezoidal net 202 to bounce up and down several times ( The amplitude of the jump will gradually decrease and then tend to be calm). In the process of jumping up and down, the impurity trapezoidal net 202 will briefly break away from the middle blocking column 208, allowing the impurity particles to slide out from the inner side of the impurity trapezoidal net 202 and fall to the inner side of the impurity storage tube cover 207, thereby automatically cleaning the impurity particles on the inner side of the impurity trapezoidal net 202, thereby preventing the impurity particles from clogging the impurity trapezoidal net 202 and affecting the cleaning effect of the filter 105, thereby effectively improving the cleaning effect of the filter 105, and further reducing the intake resistance when the intake system draws air, and improving the practicability of the filter. The relevant staff can unscrew the impurity storage tube cover 207 to clean the impurity particles on the inside thereof.

[0033] The second implementation method:

[0034] Figure 7-9A cathode air filter suitable for a hydrogen fuel cell is shown. Different from the first embodiment, a filter efficiency analysis module and an intelligent reminder module are also provided in the filter intelligent controller 003. An upper gas sensor 502 and a lower gas sensor 503 are fixedly installed on the inner wall of the chemical filter box 101. The upper gas sensor 502 and the lower gas sensor 503 are respectively located on the upper and lower sides of the chemical adsorption filter element 103. The upper gas sensor 502 and the lower gas sensor 503 are both connected to the filter efficiency analysis module signal. The filter efficiency analysis module is connected to the intelligent The reminder module signal is connected, the chemical adsorption filter element 103 is movably connected to the inner wall of the chemical filter box 101, one end of the chemical adsorption filter element 103 is detachably fixedly connected with a core replacement sealing handle 501 matching therewith, the core replacement sealing handle 501 penetrates the outer wall of the chemical filter box 101, and the core replacement sealing handle 501 is slidably sealed and connected to the outer wall of the chemical filter box 101, the upper gas sensor 502 can detect the concentration of harmful gases in the air that has not been filtered by the chemical adsorption filter element 103, and the lower gas sensor 503 can detect the concentration of harmful gases in the air that has been filtered by the chemical adsorption filter element 103. 03 The concentration of harmful gases in the filtered air, and the data detected by the upper gas sensor 502 and the lower gas sensor 503 will be transmitted to the filter efficiency analysis module. The filter efficiency analysis module can determine whether the chemical adsorption filter element 103 needs to be replaced by analyzing the detection results of the upper gas sensor 502 and the lower gas sensor 503. When the filtering effect of the chemical adsorption filter element 103 is greatly reduced and needs to be replaced, the filter efficiency analysis module will send an instruction to the intelligent reminder module, so that the intelligent reminder module will issue a reminder to the relevant personnel. After receiving the reminder, the staff can pull the core replacement sealing handle 501 outward to take out the chemical adsorption filter element 103, and then replace or maintain the chemical adsorption filter element 103. Therefore, through the joint setting of the core replacement sealing handle 501, the upper gas sensor 502, the lower gas sensor 503, etc., when the filtering effect of the chemical adsorption filter element 103 is greatly reduced and needs to be replaced, the intelligent reminder module will issue a reminder to the relevant personnel, prompting the relevant personnel to replace or maintain the chemical adsorption filter element 103 in time, thereby improving the filtering effect of the filter.

[0035] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A cathode air filter suitable for a hydrogen fuel cell, comprising a dual filter assembly, a debris removal and resistance reduction assembly, and a filter intelligent controller (003), characterized in that: The dual filtration component comprises a chemical filter box (101), the bottom end of the chemical filter box (101) is connected to a connecting pipe (102), a chemical adsorption filter element (103) matching therewith is arranged in the chemical filter box (101), the top end of the chemical adsorption filter element (103) is connected to a physical filter tube (104), a filter net (105) matching therewith is arranged in the physical filter tube (104), the impurity removal and resistance reduction component comprises an impurity collecting cylinder (201), a impurity collecting trapezoidal net (202) matching therewith is arranged in the impurity collecting cylinder (201), and a suction guide is connected to the outer wall of the impurity collecting cylinder (201) on the side close to the chemical filter box (101). (203), a guide pipe (204), the other end of the suction guide pipe (203) being connected to the chemical filter box (101), the other end of the guide pipe (204) being connected to the physical filter pipe (104), the suction guide pipe (203) being provided with a suction guide solenoid valve (205), the guide pipe (204) being provided with a guide solenoid valve (206), an elastic diaphragm (106) being embedded and penetrated on the outer wall of one side of the physical filter pipe (104), a valve regulating button (107) being fixedly mounted on the inner wall of the other side of the physical filter pipe (104), and an upper solenoid valve (108) and a lower solenoid valve (109) being provided on the physical filter pipe (104); The filter intelligent controller (003) is provided with a valve control module, the valve adjustment button (107) is connected to the valve control module by signal, and the valve control module is connected to the upper solenoid valve (108), the lower solenoid valve (109), the suction solenoid valve (205), and the impurity guide solenoid valve (206) by signal; The upper solenoid valve (108) and the lower solenoid valve (109) are respectively located on the upper and lower sides of the filter screen (105); the impurity guide pipe (204) and the suction guide pipe (203) are respectively located on the upper and lower sides of the impurity collecting trapezoidal net (202); the bottom end of the impurity guide pipe (204) is flush with the top end of the filter screen (105); the upper solenoid valve (108) and the lower solenoid valve (109) are in a closed state; the suction guide solenoid valve (205) and the impurity guide solenoid valve (206) are in an open state; and the valve adjustment button (107) is a self-resetting button.

2. A cathode air filter suitable for a hydrogen fuel cell according to claim 1, characterized in that: An air inlet hole (110) is provided on the outer wall of the physical filter tube (104); the air inlet hole (110) is located above the filter screen (105); and the diameter of the air inlet hole (110) is smaller than the inner diameter of the impurity guide tube (204).

3. A cathode air filter suitable for a hydrogen fuel cell according to claim 1, characterized in that: The bottom end of the collecting barrel (201) is configured to be open, and a matching collecting barrel cover (207) is threadedly connected to the bottom end of the collecting barrel (201); the collecting barrel trapezoidal net (202) is configured to be a hollow truncated cone with a thick top and a thin bottom; a middle blocking column (208) matching the collecting barrel trapezoidal net (202) is fixedly installed in the middle of the collecting barrel cover (207); a driving spring (209) is fixedly installed on the inner wall of the top end of the collecting barrel (201); a driving spring (209) is fixedly connected to the bottom end of the driving spring (209) with a driving spring board (210) that is slidably and sealingly connected to the collecting barrel (201); and the driving spring board (210) is fixedly connected to the collecting barrel trapezoidal net (202) via a T-shaped rod (211).

4. A cathode air filter suitable for a hydrogen fuel cell according to claim 3, characterized in that: The bottom end of the impurity collecting trapezoidal net (202) is sleeved on the outer wall of the middle blocking column (208), and the impurity collecting trapezoidal net (202) is slidably connected to the outer wall of the middle blocking column (208). The impurity collecting trapezoidal net (202) is slidably connected to the inner wall of the impurity collecting tube (201). The bottom end of the impurity collecting trapezoidal net (202) is 1-5 cm lower than the top end of the middle blocking column (208), and the driving springboard (210) is located above the impurity guiding pipe (204).

5. A cathode air filter suitable for a hydrogen fuel cell according to claim 1, characterized in that: The filter intelligent controller (003) is also provided with a filter efficiency analysis module and an intelligent reminder module. An upper gas sensor (502) and a lower gas sensor (503) are fixedly installed on the inner wall of the chemical filter box (101). The upper gas sensor (502) and the lower gas sensor (503) are respectively located on the upper and lower sides of the chemical adsorption filter element (103). The upper gas sensor (502) and the lower gas sensor (503) are both connected to the filter efficiency analysis module by signal, and the filter efficiency analysis module is connected to the intelligent reminder module by signal.

6. A cathode air filter suitable for a hydrogen fuel cell according to claim 5, characterized in that: The chemical adsorption filter element (103) is movably connected to the inner wall of the chemical filter box (101); one end of the chemical adsorption filter element (103) is detachably fixedly connected to a core replacement sealing handle (501) that matches the core replacement sealing handle (501); the core replacement sealing handle (501) penetrates the outer wall of the chemical filter box (101), and the core replacement sealing handle (501) is slidably and sealingly connected to the outer wall of the chemical filter box (101).

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