Filter for hydrogen fuel cell system and hydrogen fuel cell system

Abstract

The filter comprises a filter screen body, the filter screen body comprises a bottom wall and a side wall, the side wall is connected to the bottom wall to form a containing cavity with an opening in one end, the bottom wall and the side wall each comprise a first layer of screen body and a second layer of screen body, and the first layer of screen body is arranged in the containing cavity; the first-layer net body is arranged on the inner side of the second-layer net body and is connected with the second-layer net body, the mesh diameter of the first-layer net body is different from that of the second-layer net body, the mesh diameter of the net body, facing the fluid coming direction, in the first-layer net body and the second-layer net body is smaller than that of the net body, far away from the fluid coming direction, in the first-layer net body and the second-layer net body, and the filter net body is made of metal; the mounting part is connected to the opening so as to connect and fix the first-layer net body and the second-layer net body, and the filter can be mounted in the flow channel through the mounting part. The first layer of net body and the second layer of net body are connected with each other, one layer of net body is used for supporting, the other layer of net body is used for filtering, and the two layers of net bodies support each other, so that the overall supporting strength is improved, and the net body is not easy to damage.

Description

Technical Field

[0001] This utility model relates to a filter for a hydrogen fuel cell system and a hydrogen fuel cell system. Background Technology

[0002] With the rapid development of fuel cell systems, cooling systems have become an indispensable part of fuel cell systems in order to improve performance and reduce costs. Cooling systems are used to lower the temperature of the fuel cell system, ensuring it operates at a suitable temperature to improve efficiency. In fuel cell systems, impurities in the piping generally come from two sources: external intrusion and internal shedding. External intrusion mainly occurs during installation or maintenance. Internal shedding mainly occurs when the coating on the inner surface of components in the cooling system peels off due to aging and water erosion. To prevent impurities from affecting the system, filters are installed at the cooling inlet of the fuel cell stack. If impurities enter the fuel cell stack, there is a high probability of clogging the cooling channels. Clogged channels cannot cool the cells inside the stack, leading to burn-through. To meet the cooling requirements of fuel cell systems, high-flow-rate, high-pressure water pumps are often selected, with operating pressures as high as 2-3 barg and flow rates exceeding 500 SLPM. When impurities clog the filter screen, the pressure difference before and after the filter increases. Under the high-flow-rate erosion, the filter screen may tear due to metal fatigue at the contact point with the support ribs. Even more critically, automotive coolants typically contain a certain proportion of antifreeze. Antifreeze has a certain viscosity, which further increases the pressure difference before and after the filter when it passes through and contacts the mesh, thus placing higher demands on the filter's strength. Furthermore, in automotive cooling systems, OEMs have many stringent requirements for filters, such as small component size, dust-holding capacity, low flow resistance, and high strength, which existing filters cannot meet. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defect that the filters in the prior art cannot meet the filtration requirements of automotive cooling systems, and to provide a filter for hydrogen fuel cell systems and a hydrogen fuel cell system.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A filter for a hydrogen fuel cell system, the filter comprising:

[0006] The filter body includes a bottom wall and a side wall, the side wall being connected to the bottom wall to form a receiving cavity with one end open. Both the bottom wall and the side wall include a first mesh layer and a second mesh layer. The first mesh layer is disposed inside the second mesh layer and connected to it. The mesh aperture of the first mesh layer is different from that of the second mesh layer. In the first mesh layer and the second mesh layer, the mesh aperture of the mesh layer facing the fluid is smaller than that of the mesh layer away from the fluid. The filter body is made of metal.

[0007] The mounting component is connected to the opening in the side wall to connect and fix the first layer of mesh and the second layer of mesh. The filter can be installed in the flow channel through the mounting component.

[0008] In this design, the filter is enclosed by a bottom wall and side walls to form a receiving cavity, which can hold a certain amount of impurities. Since the filter body is composed of a first layer and a second layer of mesh, even if there are a small amount of impurities in the receiving cavity, the fluid can flow out through the mesh openings on the side walls, reducing the risk of filter blockage and failure, and extending the filter's service life. By setting the mesh opening diameters of the first and second layers of mesh to be different, the flow resistance is reduced, the effective filtration area is increased, and the effective filtration area of ​​the filter is reduced due to the stacking of the two layers of mesh, where the outer layer of filter completely covers and blocks the mesh openings of the inner layer of filter. At the same time, the design of the first and second layers of mesh being interconnected makes the two layers of mesh mutually supportive and not easily separated. Furthermore, the mesh opening diameter of the mesh facing the fluid is smaller than that of the mesh facing away from the fluid, so that the mesh facing the fluid is mainly used for filtration, while the mesh facing away from the fluid is mainly used for support, making the filter body less prone to breakage and failure, and increasing the strength of the filter body. In addition, the filter body is made of metal, which is less prone to breakage and failure, further increasing the strength of the filter body.

[0009] In addition, the mounting bracket is used to connect and fix the openings of the first and second mesh layers to improve the strength of the filter. It is also used to install the filter on the flow channel for easy installation and disassembly. With the above structural design, the filter can meet the filtration requirements of automotive cooling systems.

[0010] Preferably, the sidewall has an extension at one end near the opening, the extension being fused to the mounting member, or the extension being injection molded into the mounting member, or the extension being embedded in the mounting member.

[0011] In this solution, by providing an extension on the side wall, the filter body is securely connected to the mounting component, preventing the filter body from detaching from the mounting component.

[0012] Preferably, there are multiple extensions, and the multiple extensions are evenly spaced along the circumferential direction of the filter body.

[0013] In this solution, by setting multiple extensions and evenly spaced along the circumferential direction of the filter body, the filter body and the mounting parts are subjected to uniform force, thereby further improving the connection effect.

[0014] Preferably, the mounting member has a protrusion, and the protrusion is provided in a one-to-one correspondence with the extension, and the extension is embedded in and connected to the protrusion.

[0015] In this design, the size of the mounting component is reduced by incorporating protrusions, saving materials and lowering manufacturing costs. Furthermore, grooves are formed between adjacent protrusions, facilitating the installation and removal of the filter.

[0016] Preferably, the outer peripheral surface of the protrusion is an inclined surface, which is inclined inward from the filter body toward the mounting member.

[0017] In this design, by setting the protrusions on the inclined surface, the size of the protrusions is reduced, saving material and facilitating injection molding. Furthermore, the inclined surface also serves to guide flow and reduce flow resistance.

[0018] Preferably, the filter body is made of stainless steel and the mounting parts are made of plastic, so that the mounting parts can be connected to the filter body by injection molding.

[0019] Preferably, the outer peripheral surface of the mounting element is provided with a groove for embedding a sealing element.

[0020] In this solution, a sealing element is installed to seal between the filter and the side wall of the flow channel, thereby improving the sealing effect and ensuring that the liquid in the flow channel flows through the mesh on the filter, thus improving the filtration effect.

[0021] Preferably, both the first and second mesh layers are woven from metal wires, and at least a portion of the intersections of the metal wires in the first mesh layer are welded to at least a portion of the intersections of the metal wires in the second mesh layer.

[0022] In this design, the aforementioned structural arrangement facilitates the processing of the filter body, reduces flow resistance, and improves filtration efficiency. By welding a portion of the intersecting wires in the first layer of the mesh to a portion of the intersecting wires in the second layer, the two layers of mesh support each other, increasing their structural strength. Even if there is liquid backflow in the pipeline where the filter is installed, the two layers of mesh will not separate.

[0023] Preferably, the first layer of mesh has a mesh count of 165, a mesh aperture of 104 μm, and a wire diameter of 50 μm; the second layer of mesh has a mesh count of 20, a mesh aperture of 0.93 mm, and a wire diameter of 0.34 mm.

[0024] In this solution, the above-mentioned structural design results in a filter with low flow resistance, high strength, and large dust holding capacity, reducing the risk of clogging and failure and extending its service life.

[0025] Preferably, the bottom wall is welded to the side wall.

[0026] In this design, the aforementioned structural configuration facilitates the processing of the filter body. During processing, the bottom wall is first designed as a circle with its bottom edge turned upwards. Then, the sheet-like sidewalls are rolled into a cylindrical shape and welded together. Finally, the cylindrical sidewalls are welded to the bottom wall. The welding process can be a contact welding process such as roll welding or spot welding, or other filler welding processes. Test results show that the weld strength of this combination can reach up to 1200N. Even after being stretched by more than 10mm, the weld remains strong, and the filter maintains its filtration performance.

[0027] A hydrogen fuel cell system, the hydrogen fuel cell system including a filter for a hydrogen fuel cell system as described above.

[0028] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0029] The positive and progressive effects of this utility model are as follows: The filter is formed by a bottom wall and side walls to create a receiving cavity, which can hold a certain amount of impurities. Since the filter body is composed of a first layer of mesh and a second layer of mesh, even if there are a small amount of impurities in the receiving cavity, the fluid can flow out through the mesh openings on the side walls, reducing the risk of filter blockage and failure, and extending the filter's service life. By setting the mesh apertures of the first and second layers of mesh to be different, flow resistance is reduced, the effective filtration area is increased, and the problem of the outer filter completely covering the filter due to the stacking of the two mesh layers in the prior art is avoided. The clogging of the inner filter mesh reduces the effective filtration area of ​​the filter. Simultaneously, the interconnected design of the first and second mesh layers ensures mutual support and prevents separation. Furthermore, the mesh aperture on the fluid-facing side is smaller than that on the fluid-removing side, allowing the fluid-facing side to primarily function as a filter and the fluid-removing side as a support, thus reducing the filter body's durability and preventing failure. Additionally, the metal material of the filter body further enhances its strength and reduces the risk of breakage.

[0030] In addition, the mounting bracket is used to connect and fix the openings of the first and second mesh layers to improve the strength of the filter. It is also used to install the filter on the flow channel for easy installation and disassembly. With the above structural design, the filter can meet the filtration requirements of automotive cooling systems. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a filter according to a preferred embodiment of the present invention. Figure 1 .

[0032] Figure 2 This is a schematic diagram of the structure of a filter according to a preferred embodiment of the present invention. Figure 2 .

[0033] Figure 3 This is a schematic diagram of the structure of the filter body according to a preferred embodiment of the present invention. Figure 1 .

[0034] Figure 4 This is a schematic diagram of the structure of the filter body according to a preferred embodiment of the present invention. Figure 2 .

[0035] Explanation of reference numerals in the attached figures:

[0036] Filter body 1

[0037] Bottom wall 11

[0038] Side wall 12

[0039] Extension 121

[0040] Installation Component 2

[0041] Protrusion 21

[0042] Inclined surface 22

[0043] Groove 23 Detailed Implementation

[0044] The present invention will be described more clearly and completely below by way of embodiments and in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments described herein.

[0045] like Figures 1-4As shown, this embodiment discloses a filter for a hydrogen fuel cell system. The filter includes a filter body 1 and a mounting member 2. The filter body 1 includes a bottom wall 11 and a side wall 12. The side wall 12 is connected to the bottom wall 11 to form a receiving cavity with one end open. Both the bottom wall 11 and the side wall 12 include a first layer of mesh (not shown in the figure) and a second layer of mesh (not shown in the figure). The first layer of mesh is disposed inside the second layer of mesh and is connected to each other. The mesh aperture of the first layer of mesh is different from that of the second layer of mesh. In the first layer of mesh and the second layer of mesh, the mesh aperture of the mesh facing the fluid is smaller than that of the mesh facing away from the fluid. The filter body 1 is made of metal. The mounting member 2 is connected to the opening of the side wall 12 to connect and fix the first layer of mesh and the second layer of mesh. The filter can be installed in the flow channel through the mounting member 2.

[0046] like Figures 1-4 As shown, in this embodiment, the filter is enclosed by a bottom wall 11 and a side wall 12 to form a receiving cavity, which can hold a certain amount of impurities. Since the filter body 1 is composed of a first layer of mesh and a second layer of mesh, even if there are a small amount of impurities in the receiving cavity, the fluid can flow out from the mesh holes on the side wall 12, reducing the risk of filter blockage and failure, and extending the service life of the filter. By setting the mesh hole diameters of the first layer of mesh and the second layer of mesh to be different, the flow resistance is reduced and the effective filtration area is increased. This avoids the situation in the prior art where the outer layer of filter completely covers and blocks the mesh holes of the inner layer of filter due to the mutual stacking of the two layers of mesh, resulting in a reduction in the effective filtration area of ​​the filter. At the same time, the design of the first layer of mesh and the second layer of mesh being connected to each other, and the mesh hole diameter of the mesh facing the fluid side being smaller than that of the mesh facing away from the fluid side, makes the mesh facing the fluid side mainly used for filtration, and the mesh facing away from the fluid side mainly used for support, making the filter body 1 less prone to breakage and failure, and increasing the strength of the filter body 1. Furthermore, the filter body 1 is made of metal, which is less prone to breakage and failure, further increasing the strength of the filter body 1. In addition, the mounting component 2 is used to connect and fix the openings of the first and second mesh layers to improve the strength of the filter. It is also used to install the filter on the flow channel for easy installation and disassembly. With the above structural design, the filter can meet the filtration requirements of automotive cooling systems.

[0047] In this embodiment, there are two ways to install the filter. The first is to face the direction of the fluid flow, so that the receiving cavity can hold the filtered impurities in the fluid. The second is to install the filter with the opening facing away from the direction of the fluid flow, which can also achieve the filtering function.

[0048] like Figures 1-4As shown, the side wall 12 has an extension 121 at one end near the opening. The extension 121 is welded to the mounting part 2, or the extension 121 is injection molded into the mounting part 2, or the extension 121 is embedded in the mounting part 2. By providing the extension 121 on the side wall 12, the filter body 1 is firmly connected to the mounting part 2, preventing the filter body 1 from falling off the mounting part 2.

[0049] like Figure 3 and Figure 4 As shown, there are multiple extensions 121, which are evenly spaced along the circumferential direction of the filter body 1. By providing multiple extensions 121 and evenly spaced along the circumferential direction of the filter body 1, the filter body 1 and the mounting member 2 are subjected to uniform force, thereby further improving the connection effect.

[0050] like Figure 1 and Figure 2 As shown, the mounting component 2 has a protrusion 21, which is provided in a one-to-one correspondence with the extension 121. The extension 121 is embedded in and connected to the protrusion 21. By providing the protrusion 21, the size of the mounting component 2 is reduced, saving materials and reducing manufacturing costs. Furthermore, a groove 23 is formed between adjacent protrusions 21, which facilitates the installation and removal of the filter through the groove 23 and the protrusion 21.

[0051] like Figure 1 and Figure 2 As shown, the outer peripheral surface of the protrusion 21 is an inclined surface 22, which is inclined inward from the filter body 1 toward the mounting part 2. By providing the protrusion 21 with the inclined surface 22, the size of the protrusion 21 is reduced, saving material and facilitating injection molding. In addition, the inclined surface 22 is also used for drainage, reducing flow resistance.

[0052] Preferably, the filter body 1 is made of stainless steel, utilizing the tensile strength of stainless steel to prevent fatigue damage. The mounting part 2 is made of plastic, facilitating its connection to the filter body 1 via injection molding. The mounting part 2 is made of PPS+GF30% plastic to ensure it meets the strength requirements of the filter.

[0053] like Figure 1 and Figure 2 As shown, the outer circumferential surface of the mounting component 2 is provided with a groove 23, which is used to embed and fix the sealing element. By setting the sealing element, the sealing effect is improved between the filter and the flow channel sidewall 12, so that the liquid in the flow channel flows through the mesh on the filter, thereby improving the filtration effect.

[0054] In this embodiment, both the first and second mesh layers are woven from metal wires, reducing flow resistance and improving filtration efficiency. Furthermore, some intersections of the metal wires in the first mesh layer are welded to some intersections of the metal wires in the second mesh layer, ensuring the two mesh layers do not separate and provide mutual support, thus increasing overall strength. Even if liquid backflows in the pipeline where the filter is installed, the first and second mesh layers will not separate.

[0055] In this embodiment, the bottom wall 11 and side wall 12 of the filter body 1 are welded together, which facilitates the processing of the filter body 1. During processing, the bottom wall 11 is first designed as a circle with its bottom surface turned upwards. Then, the sheet-like side wall 12 is rolled into a cylindrical shape and welded together. Finally, the cylindrical side wall 12 is welded together with the bottom wall 11. The welding process can be a contact welding process such as roll welding or spot welding, or other filler welding processes. Experiments show that the welding strength of this combination method can reach up to 1200N. After being stretched for more than 10mm, the weld remains strong, and the filter still maintains its filtration performance.

[0056] In this embodiment, the first layer of mesh has a mesh count of 165, a mesh aperture of 104 μm, and a wire diameter of 50 μm. The second layer of mesh has a mesh count of 20, a mesh aperture of 0.93 mm, and a wire diameter of 0.34 mm. The filter designed with these parameters has low flow resistance, high strength, and large dust holding capacity, reducing the risk of clogging and failure, and extending its service life.

[0057] This embodiment discloses a hydrogen fuel cell system, which includes a filter for a hydrogen fuel cell system as described above.

[0058] In the description herein, it should be understood that the terms "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0059] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A filter for a hydrogen fuel cell system, characterized in that, The filter includes: The filter body includes a bottom wall and a side wall, the side wall being connected to the bottom wall to form a receiving cavity with one end open. Both the bottom wall and the side wall include a first mesh layer and a second mesh layer. The first mesh layer is disposed inside the second mesh layer and connected to it. The mesh aperture of the first mesh layer is different from that of the second mesh layer. In the first mesh layer and the second mesh layer, the mesh aperture of the mesh layer facing the fluid is smaller than that of the mesh layer away from the fluid. The filter body is made of metal. The mounting component is connected to the opening in the side wall to connect and fix the first layer of mesh and the second layer of mesh. The filter can be installed in the flow channel through the mounting component.

2. The filter for a hydrogen fuel cell system as described in claim 1, characterized in that, The sidewall has an extension at one end near the opening, the extension being fused to the mounting member, or the extension being injection molded into the mounting member, or the extension being embedded in the mounting member.

3. The filter for a hydrogen fuel cell system as described in claim 2, characterized in that, The number of extensions is multiple, and the multiple extensions are evenly spaced along the circumferential direction of the filter body.

4. The filter for a hydrogen fuel cell system as described in claim 3, characterized in that, The mounting component has a protrusion, and the protrusion and the extension are respectively provided. The extension is embedded in and connected to the protrusion.

5. The filter for a hydrogen fuel cell system as described in claim 4, characterized in that, The outer peripheral surface of the protrusion is an inclined surface, which is inclined inward from the filter body toward the mounting component.

6. The filter for a hydrogen fuel cell system as described in claim 1, characterized in that, The outer circumferential surface of the mounting component is provided with a groove, which is used to embed a sealing element.

7. The filter for a hydrogen fuel cell system as described in claim 1, characterized in that, Both the first and second mesh layers are woven from metal wires, and at least a portion of the intersections of the metal wires in the first mesh layer are welded to at least a portion of the intersections of the metal wires in the second mesh layer.

8. The filter for a hydrogen fuel cell system as described in claim 7, characterized in that, The first layer of mesh has a mesh count of 165, a mesh aperture of 104 μm, and a wire diameter of 50 μm. The second layer of mesh has a mesh count of 20, a mesh aperture of 0.93 mm, and a wire diameter of 0.34 mm.

9. The filter for a hydrogen fuel cell system as described in claim 1, characterized in that, The bottom wall is welded to the side wall.

10. A hydrogen fuel cell system, characterized in that, The hydrogen fuel cell system includes a filter for a hydrogen fuel cell system as described in any one of claims 1-9.

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