Novel hydrogen fuel cell deionizer

Abstract

The utility model relates to the field of fuel cells, and discloses a novel hydrogen fuel cell deionizer which comprises a barrel, end covers are arranged at two ends of the barrel, mixed bed resin is filled in a cavity of the barrel, a liquid inlet and a liquid outlet are respectively arranged on the two end covers, a composite nylon filter screen is arranged in each end cover, and the composite nylon filter screen is provided with a double-layer filter screen structure. The inner side filter screen is high in strength and small in mesh number, the outer side filter screen is low in strength and large in mesh number, a liquid inlet cavity, a transition cavity and a discharge cavity are sequentially formed in the end cover, the cavity bodies of the liquid inlet cavity, the transition cavity and the discharge cavity are sequentially enlarged, the liquid inlet cavity is formed in the liquid inlet / liquid outlet, the discharge cavity is communicated with the cavity of the barrel, and the composite nylon filter screen is arranged in the discharge cavity. According to the deionizer, brand new flow channel design is adopted, flow resistance and exchange capacity are balanced, meanwhile, the composite nylon filter screen without ion precipitation is adopted, the service life of the deionizer is further prolonged, and long-term stable work in a high-temperature environment is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell technology, and in particular to a novel hydrogen fuel cell deionizer. Background Technology

[0002] Fuel cells are widely used in stationary power generation, transportation, and portable power sources due to their advantages such as high efficiency, low noise, low start-up temperature, and zero pollution. Fuel cells contain metal components, and during operation, ion generation is inevitable due to wear of these metal components and corrosion of pipelines and other components by gases and liquids. Simultaneously, high voltage is generated on the bipolar plates of the fuel cell during operation. However, this high voltage must not be transmitted through the coolant between the bipolar plates to the entire cooling circulation channel. Therefore, the coolant must be non-conductive. If the coolant contains ions (positive or negative ions), it will become conductive, causing the bipolar plates to change from a series connection to a parallel connection, potentially charging the fuel cell stack and directly damaging it. Therefore, ion filters play a crucial role in the fuel cell cooling system.

[0003] Currently, most ion filters used in fuel cell cooling systems employ a straight-through structure, including internal and external straight-through and top and bottom straight-through types. Internal and external straight-through deionizers have low flow resistance but require less mixed-bed resin, resulting in insufficient exchange capacity. Top and bottom straight-through deionizers, on the other hand, have a larger mixed-bed resin content but higher flow resistance, which affects system cooling efficiency. Furthermore, existing ion filters commonly use metal mesh, which can lead to metal ion precipitation after prolonged use. Therefore, there is an urgent need for a fuel cell deionizer that combines low flow resistance, high exchange capacity, and minimal metal ion precipitation. Utility Model Content

[0004] The purpose of this invention is to provide a novel hydrogen fuel cell deionizer to solve the problems and defects mentioned in the background art.

[0005] To achieve the above objectives, the following technical solution is provided:

[0006] A novel hydrogen fuel cell deionizer includes a cylindrical body with end caps at both ends, the cylindrical body being fixedly connected to the end caps. The cavity of the cylindrical body is filled with mixed-bed resin. The two end caps are respectively provided with an inlet and an outlet. A composite nylon filter is disposed inside each end cap. The composite nylon filter has a double-layer filter structure, including an inner filter and an outer filter. The inner filter has higher strength and a smaller mesh size, while the outer filter has lower strength and a larger mesh size. An inlet chamber, a transition chamber, and an outlet chamber are sequentially arranged inside the end cap, with the chamber sizes increasing sequentially. The inlet chamber is located inside the inlet / outlet, and the outlet chamber communicates with the cavity of the cylindrical body. The composite nylon filter is disposed in the outlet chamber.

[0007] In this invention, the end cap flow channel design incorporates the Venturi effect, where flow velocity is inversely proportional to the cross-sectional area of ​​the flow. Low pressure is generated near high-speed fluid flow, resulting in adsorption. The flow resistance of the deionizer primarily occurs on the filter screen. The inlet chamber, transition chamber, and outlet chamber feature a gradually increasing cavity design, causing the coolant flow velocity to gradually decrease. Simultaneously, the area of ​​the composite nylon filter screen is significantly larger than that of the inlet chamber, greatly reducing flow resistance. Furthermore, the double-layer composite nylon filter screen ensures filter strength while preventing mixed-bed resin from penetrating the filter screen.

[0008] Furthermore, the inner diameter of the middle section of the cylinder is smaller than the inner diameter of the two end sections of the cylinder.

[0009] This invention, through its "waist-cinching design," firstly facilitates clamp fixation, ensuring that the deionizer does not move axially after being fixed. Most importantly, this design allows the coolant and mixed-bed resin to combine more fully, resulting in more uniform coolant diffusion and thus improving the adsorption of ions by the mixed-bed resin.

[0010] Furthermore, a reinforcing rib is provided at the connection between the back of the end cap and the inlet / outlet.

[0011] In this invention, since the inlet and outlet of the end cap have small diameters and low strength, reinforcing ribs can be provided to significantly increase the strength of the inlet and outlet and prevent breakage.

[0012] Furthermore, anti-detachment barbs are provided on the circumference of the liquid inlet and the liquid outlet.

[0013] Anti-detachment structures are installed at the inlet and outlet to effectively prevent the coolant hose from coming off.

[0014] Preferably, the anti-detachment structure is a barb.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] This invention fully utilizes the Venturi effect and employs a novel flow channel design to balance flow resistance and exchange capacity. It also replaces the traditional stainless steel filter with a double-layer composite nylon filter that prevents ion release, thus extending the deionizer's lifespan. Furthermore, the composite nylon filter can operate stably for extended periods at temperatures up to 95°C. The deionizer's outer shell features a tapered design, narrower in the middle and wider at both ends. This design facilitates clamp fixation, preventing axial movement after the deionizer is secured, and allows for more thorough integration of the coolant and mixed-bed resin, resulting in more uniform coolant diffusion and enhanced ion adsorption by the mixed-bed resin. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the longitudinal section structure of a novel hydrogen fuel cell deionizer according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the end cap structure of a novel hydrogen fuel cell deionizer according to an embodiment of the present invention;

[0019] Figure 3 for Figure 2 Side view;

[0020] Figure 4 for Figure 1 Enlarged view of part A;

[0021] Figure 5 This is an exploded view of a novel hydrogen fuel cell deionizer according to an embodiment of the present invention;

[0022] Reference numerals: 1. Cylinder; 2. End cap; 21. Liquid inlet chamber; 22. Transition chamber; 23. Discharge chamber; 24. Weld line; 25. Reinforcing rib; 3. Mixed bed resin; 4. Liquid inlet; 41. Anti-detachment structure; 5. Liquid outlet; 6. Composite nylon filter screen; 61. Inner filter screen; 62. Outer filter screen. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, and several embodiments of the utility model will be provided. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and complete.

[0025] like Figures 1 to 5 As shown, a novel hydrogen fuel cell deionizer includes a cylindrical body 1, with end caps 2 at both ends of the cylindrical body 1, which are fixedly connected to the end caps 2. The cavity of the cylindrical body 1 is filled with mixed bed resin 3. The two end caps 2 are respectively provided with an inlet 4 and an outlet 5. A composite nylon filter 6 is provided inside the end cap 2. The composite nylon filter 6 has a double-layer filter structure, including an inner filter 61 and an outer filter 62. The inner filter 61 has higher strength and a smaller mesh size, while the outer filter 62 has lower strength and a larger mesh size. The end cap 2 is provided with an inlet chamber 21, a transition chamber 22, and an outlet chamber 23 in sequence. The cavities of the inlet chamber 21, the transition chamber 22, and the outlet chamber 23 increase in size sequentially. The inlet chamber 21 is located inside the inlet 4 / outlet 5, and the outlet chamber 23 is connected to the cavity of the cylindrical body 1. The composite nylon filter 6 is located in the outlet chamber 23.

[0026] In this embodiment, the end caps 2 at both ends of the cylinder 1 adopt the same structural design. The cylinder 1 and the end caps 2 are fixedly connected by laser welding. In order to facilitate a firm welding, two rings of welding lines 24 are set on the inner circumference of the discharge cavity 23, and the welding lines 24 with an isosceles triangle cross section are used to make the welding more precise, stable and reliable.

[0027] Among them, the cylinder 1 adopts a waist-tight design, that is, the inner diameter of the middle section is smaller than the inner diameter of the two end sections of the cylinder 1.

[0028] Among them, a reinforcing rib plate 25 is provided at the connection between the back of the end cap 2 and the liquid inlet 4 / liquid outlet 5.

[0029] Among them, the inlet 4 and the outlet 5 are provided with anti-detachment structure 41, which is a barb.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel hydrogen fuel cell deionizer, comprising a cylindrical body (1), wherein end caps (2) are provided at both ends of the cylindrical body (1), the cylindrical body (1) and the end caps (2) are fixedly connected, the cavity of the cylindrical body (1) is filled with mixed bed resin (3), and the two end caps (2) are respectively provided with a liquid inlet (4) and a liquid outlet (5), characterized in that, The end cap (2) is provided with a composite nylon filter screen (6). The composite nylon filter screen (6) has a double-layer filter screen structure, including an inner filter screen (61) and an outer filter screen (62). The inner filter screen (61) has higher strength and smaller mesh size, while the outer filter screen (62) has lower strength and larger mesh size. The end cap (2) is provided with an inlet chamber (21), a transition chamber (22), and an outlet chamber (23) in sequence. The cavities of the inlet chamber (21), the transition chamber (22), and the outlet chamber (23) increase in size in sequence. The inlet chamber (21) is located inside the inlet port (4) / outlet port (5). The outlet chamber (23) is connected to the cavity of the cylinder (1). The composite nylon filter screen (6) is located in the outlet chamber.

2. The novel hydrogen fuel cell deionizer according to claim 1, characterized in that, The inner diameter of the middle section of the cylinder (1) is smaller than the inner diameter of the two end sections of the cylinder (1).

3. The novel hydrogen fuel cell deionizer according to claim 1, characterized in that, A reinforcing rib (25) is provided at the connection between the back of the end cap (2) and the inlet (4) / outlet (5).

4. A novel hydrogen fuel cell deionizer according to claim 1, characterized in that, Both the liquid inlet (4) and the liquid outlet (5) are provided with anti-detachment structures (41) on their circumference.

5. A novel hydrogen fuel cell deionizer according to claim 4, characterized in that, The anti-detachment structure (41) is a barb.

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