Fault self-suppression fuel cell air filter device

Abstract

The application relates to a fault self-inhibiting fuel cell air filtering device applied to the field of air filters, which comprises a filtering cylinder, a suction pipe and an adsorption core ring are arranged at the bottom of the filtering cylinder, an air inlet pipe is arranged through the bottom of the filtering cylinder, a dynamic ring is slidably connected to the inner wall of the air inlet pipe, a filter bag is arranged on the inner side surface of the dynamic ring, a switching assembly is arranged on the filtering cylinder, a constraint ring groove is fixedly arranged at the bottom of the filtering cylinder, a cleaning assembly is arranged below the constraint ring groove, the cleaning assembly comprises an inner gear ring, a driving motor is arranged on the surface of the suction pipe through a supporting plate, a driving gear is connected to the output end of the driving motor, a beating piece is arranged on the surface of the inner gear ring, through cooperation of the filter bag, the switching assembly and the cleaning assembly, the filter bag is fully unfolded for efficient interception, when blockage occurs, the switching assembly makes the filter bag evert to expose the blockage surface, and then the cleaning assembly beats and removes dust from the filter bag.

Description

Technical Field

[0001] This invention relates to fuel cell air filtration devices, and more particularly to a fault-inhibiting fuel cell air filtration device for use in the field of air filters. Background Technology

[0002] The core function of air filtration devices for fuel cells is to provide clean and stable air, primarily oxygen, to the fuel cell stack, ensuring its efficient, safe, and long-term operation. By intercepting and filtering particulate matter in the air, it prevents particulate matter from entering the stack and clogging the gas diffusion layer, thus reducing oxygen transmission efficiency. It also prevents particulate matter from contaminating the catalyst, thereby ensuring the activity of the electrochemical reaction.

[0003] Chinese invention patent CN115138189B discloses a three-stage air filtration device for fuel cell cathodes. Compared with the prior art, this invention has a three-stage filtration structure, mainly utilizing a rigid filtration structure, and is cleaned by scraping or by stopping the machine for disassembly and assembly.

[0004] Chinese invention patent CN115121080B discloses a chemical filtration device for use in fuel cell stacks. The chemical filtration device is used to filter the air passing through the air inlet of the fuel cell stack assembly, thereby extending the service life of the proton exchange membrane and improving the service life and working efficiency of the fuel cell system.

[0005] Existing filtration devices use rigid filter screens to intercept and filter dust. As the filtration time increases, the filter screen will become clogged. At this time, it is necessary to use structures such as scrapers to clean the surface of the filter screen and thus achieve a self-clogging inhibition effect. However, scraper cleaning is difficult to remove the material stuck in the filter screen pores. In addition, the blockage after scraper cleaning needs to be transferred out of the filtration device to avoid secondary clogging. This results in a large number of related structures in the filtration device, occupying filtration space. Summary of the Invention

[0006] The technical problem to be solved by the present invention in view of the above-mentioned prior art is that the air filtration device for fuel cells suffers from incomplete cleaning, low maintenance efficiency, and insufficient self-inhibition ability due to filter bag clogging during long-term operation.

[0007] To address the aforementioned problems, this invention provides a fault-inhibiting fuel cell air filtration device, comprising a filter cylinder with an alarm mounted on its surface, a suction pipe and an adsorption core ring located outside the suction pipe at the bottom center of the filter cylinder, a control valve mounted on the surface of the suction pipe, multiple air inlet pipes located outside the adsorption core ring extending through the bottom of the filter cylinder, a moving ring slidably connected to the inner wall of the air inlet pipe, a filter bag mounted on the inner surface of the moving ring, a switching component for switching the placement state of the filter bag mounted on the filter cylinder, a constraint ring groove fixedly mounted at the bottom of the filter cylinder located outside the suction pipe, a cleaning component for tapping and cleaning the filter bag arranged below the constraint ring groove, the cleaning component including an internal gear ring, the top of the internal gear ring being connected to a roller rotatably connected in the constraint ring groove, a drive motor mounted on the surface of the suction pipe via a support plate, the output end of the drive motor being connected to a drive gear meshing with the internal gear ring, and a tapping element mounted on the surface of the internal gear ring.

[0008] In the aforementioned fault-inhibiting fuel cell air filtration device, the filter bag is fully expanded for efficient interception through the cooperation of the filter bag, switching component, and cleaning component. When blockage occurs, the switching component causes the filter bag to turn outward to expose the blockage surface, and then the cleaning component beats the filter bag to remove dust.

[0009] As a further improvement of this application, the switching component includes an isolation cover installed on the top of the filter cylinder. A lifting motor is installed inside the isolation cover. The output end of the lifting motor is connected to a winding rod. A lifting rope is wound around the surface of the winding rod. A gravity ball is connected to the tail end of the lifting rope. The bottom surface of the gravity ball is connected to the bottom center of the inner surface of the filter bag when it is placed vertically.

[0010] As a further improvement of this application, a gas sensor is installed on the bottom wall of the filter cylinder, located inside the adsorption core ring, to detect the adsorption state of the adsorption core ring. The inner wall of the air inlet pipe is provided with a sliding groove, and the moving ring is slidably connected to the inside of the sliding groove through a slider.

[0011] As a further improvement of this application, the inner wall of the filter cylinder is provided with a constraint groove, and a connecting rod is slidably connected inside the constraint groove. An electromagnetic ring is connected to the tail end of the connecting rod, and a magnetic ring is fixedly sleeved on the surface of the tail end of the lifting rope. The center of the electromagnetic ring and the center of the air inlet pipe are located on the same vertical axis.

[0012] As a further improvement of this application, a displacement sensor connected to the electromagnetic ring signal is installed on the surface of the connecting rod, and a dust concentration sensor is installed on the inner wall of the filter cylinder to help determine whether the filter bag has ruptured. Both the filter bag and the lifting rope are made of wear-resistant materials.

[0013] As a further improvement of this application, a fault self-inhibition system is also included. The fault self-inhibition system includes a blockage clearing module and a fall restraint module. The blockage clearing module is signal-connected to the clearing component and the switching component to cooperate in performing outward-folding blockage clearing on the filter bag. The fall restraint module is signal-connected to the displacement sensor and the electromagnetic ring to restrain the falling path of the gravity ball.

[0014] As another improvement of this application, a rotating motor is mounted on the surface of the internal gear ring, the output end of the rotating motor is connected to an electric push rod, and the power end of the electric push rod is connected to the surface of the striking component.

[0015] As a further supplement to this application, there is a gap between the surface of the electric actuator and the surface of the internal gear ring, and the rotating motor is located below the constraint ring groove.

[0016] In summary, during the filtration stage, the suction action causes the filter bag to fully expand, efficiently intercepting dust, while the adsorption core further purifies harmful gases. When blockage occurs, the switching component drives the gravity ball downward, causing the filter bag to flip over and expose the blocked surface. Subsequently, the cleaning component uses rotating beaters to thoroughly beat and remove dust from the filter bag. Addressing the issue of blind spots in cleaning the lower part of the filter bag surface, this invention proposes two solutions: first, for minor blockages, lifting the gravity ball forms a W-shaped fold structure, overlapping the bottom area to supplement the beating; second, for severe blockages, using an electric actuator to adjust the angle of the beaters ensures coverage of the entire filter bag length, thus achieving comprehensive beating and cleaning. Furthermore, an electromagnetic ring and displacement sensor work together to constrain the gravity ball's descent path, preventing airflow interference, while gas and dust concentration sensors monitor the status of the adsorption core and filter bag in real time, triggering alarms or closing control valves to remind users to replace or maintain the filter, ensuring stable operation of the filtration device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of this application; Figure 2 This is a schematic diagram of the internal structure of the filter cylinder according to the first embodiment of this application; Figure 3 For this application Figure 2 Enlarged diagram of point A in the diagram; Figure 4 This is a schematic diagram of the cleaning component according to the first embodiment of this application; Figure 5 This is a structural diagram of the moving ring and filter bag according to the first embodiment of this application; Figure 6 This is a structural diagram of the filter bag in a filled state during suction, according to the first embodiment of this application. Figure 7This is a schematic diagram of the beater cleaning the outwardly turned filter bag according to the first embodiment of this application; Figure 8 This is a schematic diagram of the filter bag in a W-shaped folded state after the beater has cleaned the filter bag after it has been turned inside out according to the first embodiment of this application. Figure 9 This is a cross-sectional view of the filter bag in the first embodiment of this application when it is in a W-shaped folded state; Figure 10 This is a schematic diagram of the installation of the rotary motor and electric actuator according to the second embodiment of this application; Figure 11 This is a diagram showing the state of the lower surface of the filter bag being patted and cleaned by the extension of the electric actuator after the second embodiment of this application is implemented, under the action of the rotating motor.

[0018] Explanation of the labels in the diagram: 1. Filter cylinder; 2. Suction tube; 3. Air inlet pipe; 31. Moving ring; 4. Isolation cover; 41. Lifting motor; 42. Lifting rope; 43. Gravity ball; 5. Filter bag; 6. Drive motor; 7. Internal gear ring; 8. Beating component; 9. Drive gear; 10. Constraint ring groove; 101. Adsorption core ring; 11. Connecting rod; 12. Electromagnetic ring; 13. Magnetic ring; 14. Electric push rod; 15. Rotating motor; 16. Roller. Detailed Implementation

[0019] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0020] First implementation method: Figures 1-5 The diagram illustrates a fault-inhibiting fuel cell air filtration device, comprising a filter cylinder 1 with an alarm mounted on its surface. A suction pipe 2 and an adsorption core ring 101 located outside the suction pipe 2 are mounted at the bottom center of the filter cylinder 1. A control valve is mounted on the surface of the suction pipe 2. Multiple air inlet pipes 3 are installed through the bottom of the filter cylinder 1, located outside the adsorption core ring 101. A moving ring 31 is slidably connected to the inner wall of the air inlet pipes 3. A filter bag 5 is mounted on the inner surface of the moving ring 31. A switch for changing the filter bag is mounted on the filter cylinder 1. 5. The switching component for the placement state: The bottom of the filter cylinder 1 is fixedly installed with a constraint ring groove 10 located outside the suction pipe 2. Below the constraint ring groove 10, a cleaning component for beating and cleaning the filter bag 5 is arranged. The cleaning component includes an inner toothed ring 7, and the top of the inner toothed ring 7 is connected to a roller 16 rotatably connected in the constraint ring groove 10. The surface of the suction pipe 2 is equipped with a drive motor 6 through a support plate. The output end of the drive motor 6 is connected to a drive gear 9 that meshes with the inner toothed ring 7. A beating element 8 is installed on the surface of the inner toothed ring 7.

[0021] Figure 2As shown, the switching assembly includes an isolation cover 4 installed on top of the filter cylinder 1. A lifting motor 41 is installed inside the isolation cover 4. The output end of the lifting motor 41 is connected to a winding rod. A lifting rope 42 is wound around the surface of the winding rod. A gravity ball 43 is connected to the tail end of the lifting rope 42. The bottom surface of the gravity ball 43 is connected to the bottom center of the inner surface of the filter bag 5 when it is placed vertically.

[0022] Specifically, during the air filtration operation of the fuel cell, a suction device is installed on the suction pipe 2. Under the suction action, air outside the filter cylinder 1 enters the interior of the filter cylinder 1 through the air inlet pipe 3. Under the action of the gas, the filter bag 5, which was originally stretched and placed vertically due to the lifting action, gradually becomes full. When the gas passes through the filter bag 5, the inner surface of the filter bag 5 plays a role in intercepting particles and dust (such as...). Figure 6 As shown in the figure, the gas then passes through the adsorption core ring 101, where harmful gases in the gas are chemically adsorbed (the adsorption core ring 101 is made of chemical adsorption material, which is existing technology and will not be described in detail). After that, the gas is discharged from the interior of the filter cylinder 1 through the suction pipe 2, providing clean and stable air for the fuel cell.

[0023] As the filtration process continues, the inner surface of the filter bag 5 gradually becomes clogged. The suction operation is briefly stopped. With the cooperation of the lifting motor 41 and the lifting rope 42, the gravity ball 43 descends (the gravity ball 43's weight is sufficient to resist the upward wind force, ensuring its smooth descent). During the descent of the gravity ball 43, the originally inflated filter bag 5 gradually moves downwards until it reaches below the air inlet pipe 3 (the gravity ball 43 causes the moving ring 31 connected to the filter bag 5 to move along the chute to the bottom of the chute, meaning the filter bag 5 is essentially in the outer area of ​​the air inlet pipe 3, allowing for more comprehensive cleaning and dust removal during subsequent tapping). This causes the inner surface, which was originally used to intercept particles and dust, to turn outwards. Then, the drive motor 6 is started, rotating the inner gear ring 7, causing the tapping element 8 on the surface of the inner gear ring 7 to approach and tap the upper part of the filter bag 5 for cleaning (e.g., ...). Figure 7 (As shown), then the inner toothed ring 7 is rotated in the opposite direction to tap the surface of the adjacent filter bags 5, making the tapping and cleaning work more comprehensive, and can also directly clean the blockage out of the interior of the filter cylinder 1.

[0024] During the rotation of the internal gear ring 7, because it is rotatably connected to the constraint ring groove 10 through the roller 16, it is constrained by the constraint ring groove 10 during rotation and can stably perform circular motion.

[0025] Figures 8-9As shown, because the length of the filter bag 5 is greater than the length of the beating component 8, the lower part of the filter bag 5 is not effectively cleaned during the beating process. To address this issue, before cleaning the lower part of the filter bag 5, the gravity ball 43 can be raised to a position near the bottom of the air inlet pipe 3 using the lifting motor 41 and lifting rope 42 (if the filter bag 5 is long, the gravity ball 43 needs to be raised further). This allows the filter bag 5 to form a W-shaped bag structure, causing the lower and upper parts of the filter bag 5 to overlap, allowing it to receive a corresponding beating cleaning effect during subsequent beating, thus supplementing the beating cleaning dust removal function.

[0026] A gas sensor (the specific model is selected according to actual needs and will not be described in detail here) is installed on the bottom wall of the filter cylinder 1 inside the adsorption core ring 101. It is used to detect the adsorption state of the adsorption core ring 101. The inner wall of the air inlet pipe 3 is provided with a sliding groove, and the moving ring 31 is slidably connected to the inside of the sliding groove through a slider.

[0027] Specifically, when the intake pipe 3 is turned outward, the inner wall of the intake pipe 3 is acted upon by the moving ring 31 and the slider on the surface of the moving ring 31 (the cross section of the slider is the same as the cross section of the groove, and they are in an interlocking state), which can play a relatively complete sealing role on the inner wall of the intake pipe 3, preventing unfiltered air from entering the interior of the intake pipe 3.

[0028] Figure 3 As shown, the inner wall of the filter cylinder 1 is provided with a constraint groove, and a connecting rod 11 is slidably connected inside the constraint groove. An electromagnetic ring 12 is connected to the tail end of the connecting rod 11. A magnetic ring 13 is fixedly sleeved on the tail end surface of the lifting rope 42, and the center of the electromagnetic ring 12 and the center of the air inlet pipe 3 are located on the same vertical axis.

[0029] Specifically, when the gravity ball 43 falls, the presence of suction airflow inside the filter cylinder 1 may affect the falling path of the gravity ball 43. Therefore, when falling, the electromagnetic ring 12 is activated, so that it is attracted and connected to the magnetic ring 13 on the surface of the lifting rope 42. Under the action of the connecting rod 11, the gravity ball 43 will be constrained when falling until the gravity ball 43 falls into the air intake pipe 3. Then the electromagnetic ring 12 is closed, and the gravity ball 43 can continue to fall until the moving ring 31 is pulled to the bottom of the chute.

[0030] After cleaning, the lifting motor 41 and lifting rope 42 are used to lift the gravity ball 43 and the filter bag 5 in the outward position into the filter cylinder 1. During this process, the electromagnetic ring 12 will slide up along the inside of the constraint groove due to the pushing action of the gravity ball 43 below, until the gravity ball 43 stops moving up. At this time, the moving ring 31 and the filter bag 5 on the surface will also move to the top of the slide groove, waiting for the next round of filtration and interception operation.

[0031] A displacement sensor connected to the electromagnetic ring 12 is installed on the surface of the connecting rod 11. A dust concentration sensor is installed on the inner wall of the filter cylinder 1 to help determine whether the filter bag 5 has ruptured. Both the filter bag 5 and the lifting rope 42 are made of wear-resistant materials.

[0032] Specifically, if the adsorption core ring 101 is damaged and harmful gases (such as sulfur dioxide) are present in the gas entering the suction pipe 2, the presence of harmful gases can be detected by the gas sensor, which then sends a signal to the control valve and alarm connected to it. The control valve closes and the alarm sounds, reminding the user to replace and maintain the adsorption core ring 101. In addition, if the filter bag 5 is damaged, dust will be present in the space between the adsorption core ring 101 and the inner wall of the filter cylinder 1 during operation. This dust will be detected by the dust concentration sensor, which then sends a signal to the alarm and control valve to stop the suction operation and remind the user to replace and maintain the filter bag 5.

[0033] It also includes a fault self-inhibition system, which includes a blockage clearing module and a fall restraint module. The blockage clearing module is signal-connected to the clearing component and the switching component to cooperate in cleaning the filter bag 5 by turning it inside out. The fall restraint module is signal-connected to the displacement sensor and the electromagnetic ring 12 to restrain the falling path of the gravity ball 43.

[0034] Specifically, the blockage-clearing module is signal-connected to the lifting motor 41 and the drive motor 6 to assist the release of the lifting rope 42, causing the filter bag 5 to fall outwards and be patted clean accordingly. The restraint-fall module is mainly used to restrain the falling path of the gravity ball 43 before it falls into the air inlet pipe 3, preventing deviation and thus ensuring the smooth falling and outward turning of the filter bag 5.

[0035] Second implementation method: Figure 10 As shown, a rotary motor 15 is mounted on the surface of the internal gear ring 7, and an electric push rod 14 is connected to the output end of the rotary motor 15. The power end of the electric push rod 14 is connected to the surface of the striking member 8.

[0036] There is a gap between the surface of the electric actuator 14 and the surface of the internal gear ring 7, and the rotating motor 15 is located below the constraint ring groove 10.

[0037] Unlike the first embodiment, in the first embodiment, the bottom of the filter bag 5 is pulled up to form a bag-shaped structure with a W-shaped cross section for tapping to clean the surface of the lower part of the filter bag 5. However, if the filter bag 5 is heavily clogged, the tapping effect on the lower part of the filter bag 5 is weaker than that on the outer surface because it is on the inner side, resulting in unstable cleaning quality. This embodiment makes corresponding improvements to address this issue.

[0038] Specifically, after the upper part of the filter bag 5 is cleaned by tapping with the tapping component 8, the electric push rod 14 can be extended to increase the horizontal distance between the tapping component 8 and the surface of the inner toothed ring 7. Then, the electric push rod 14 is rotated by the rotating motor 15, causing the electric push rod 14 to tilt until the tapping component 8 at the tail end of the electric push rod 14 falls into the effective cleaning area of ​​the filter bag 5. Then, the rotation stops, and the tapping operation continues (e.g., ...). Figure 11 (As shown).

[0039] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A fault-inhibiting fuel cell air filtration device, comprising a filter cylinder (1) with an alarm mounted on its surface, characterized in that: A suction pipe (2) and an adsorption core ring (101) located outside the suction pipe (2) are installed at the center of the bottom of the filter cylinder (1). A control valve is installed on the surface of the suction pipe (2). Multiple air inlet pipes (3) located outside the adsorption core ring (101) are installed through the bottom of the filter cylinder (1). A moving ring (31) is slidably connected to the inner wall of the air inlet pipe (3). A filter bag (5) is installed on the inner surface of the moving ring (31). A switching component for switching the placement state of the filter bag (5) is installed on the filter cylinder (1). The bottom of the filter cylinder (1) A constraint ring groove (10) is fixedly installed on the outside of the suction pipe (2). A cleaning component for beating and cleaning the filter bag (5) is arranged below the constraint ring groove (10). The cleaning component includes an internal gear ring (7), and the top of the internal gear ring (7) is connected to a roller (16) rotatably connected in the constraint ring groove (10). A drive motor (6) is installed on the surface of the suction pipe (2) through a support plate. The output end of the drive motor (6) is connected to a drive gear (9) that meshes with the internal gear ring (7). A beating component (8) is installed on the surface of the internal gear ring (7).

2. The fault-inhibiting fuel cell air filtration device according to claim 1, characterized in that: The switching assembly includes an isolation cover (4) installed on top of the filter cylinder (1). A lifting motor (41) is installed inside the isolation cover (4). The output end of the lifting motor (41) is connected to a winding rod. A lifting rope (42) is wound around the surface of the winding rod. A gravity ball (43) is connected to the tail end of the lifting rope (42). The bottom surface of the gravity ball (43) is connected to the bottom center of the inner surface of the filter bag (5) when it is placed vertically.

3. The fault-inhibiting fuel cell air filtration device according to claim 1, characterized in that: The bottom wall of the filter cylinder (1) is equipped with a gas sensor located inside the adsorption core ring (101) to detect the adsorption state of the adsorption core ring (101). The inner wall of the air inlet pipe (3) is provided with a sliding groove, and the moving ring (31) is slidably connected to the inside of the sliding groove by a slider.

4. The fault-inhibiting fuel cell air filtration device according to claim 2, characterized in that: The inner wall of the filter cylinder (1) is provided with a constraint groove, and a connecting rod (11) is slidably connected inside the constraint groove. An electromagnetic ring (12) is connected to the tail end of the connecting rod (11). A magnetic suction ring (13) is fixedly sleeved on the tail end surface of the lifting rope (42), and the center of the electromagnetic ring (12) and the center of the air inlet pipe (3) are located on the same vertical axis.

5. The fault-inhibiting fuel cell air filtration device according to claim 4, characterized in that: The surface of the connecting rod (11) is equipped with a displacement sensor that is connected to the electromagnetic ring (12) by signal. The inner wall of the filter cylinder (1) is equipped with a dust concentration sensor to help determine whether the filter bag (5) has been broken. The filter bag (5) and the lifting rope (42) are both made of wear-resistant materials.

6. The fault-inhibiting fuel cell air filtration device according to claim 5, characterized in that: It also includes a fault self-inhibition system, which includes a blockage clearing module and a fall restraint module. The blockage clearing module is signal-connected to the clearing component and the switching component to cooperate in cleaning the filter bag (5) by turning it outward. The fall restraint module is signal-connected to the displacement sensor and the electromagnetic ring (12) to restrain the falling path of the gravity ball (43) when it falls.

7. The fault-inhibiting fuel cell air filtration device according to claim 1, characterized in that: A rotating motor (15) is mounted on the surface of the internal gear ring (7). The output end of the rotating motor (15) is connected to an electric push rod (14), and the power end of the electric push rod (14) is connected to the surface of the striking component (8).

8. A fault-inhibiting fuel cell air filtration device according to claim 7, characterized in that: There is a gap between the surface of the electric push rod (14) and the surface of the internal gear ring (7), and the rotating motor (15) is located below the constraint ring groove (10).

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