Hydrogen recovery device for hydrogen fuel cell

Abstract

The utility model discloses a hydrogen recovery device for a hydrogen fuel cell, which belongs to the technical field of fuel cells and comprises a cell body, a connecting pipe is fixedly connected to the bottom of one side of the cell body, a first one-way valve is arranged outside the connecting pipe, and a water inlet tank is arranged on one side, far away from the cell body, of the connecting pipe. A through groove is formed in the inner wall of the water inlet tank. According to the hydrogen recovery device for the hydrogen fuel cell, a water pump, a curved pipe, a first one-way valve and a through groove are arranged, the first one-way valve is closed, and water in a water storage tank is guided into the through groove through the curved pipe by the water pump, so that the water drives a floating ball to move upwards while driving hydrogen to flow into an ascending pipe at the top in the through groove; therefore, the floating ball can abut against the bottom of the ascending pipe after water discharges hydrogen out of the through groove, water is prevented from entering the ascending pipe, water is prevented from entering the battery body to affect normal reaction of hydrogen and oxygen, and the power generation efficiency of the battery body is improved.

Description

Technical Field

[0001] This utility model belongs to the field of fuel cell technology, specifically a hydrogen recovery device for hydrogen fuel cells. Background Technology

[0002] A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. The basic principle of a hydrogen fuel cell is the reverse reaction of water electrolysis. At the anode, hydrogen is supplied and diffuses outward, reacting with the electrolyte and releasing electrons. These electrons reach the cathode through an external load. At the cathode, oxygen combines with electrons and hydrogen ions to form water. Hydrogen fuel cells have the advantages of being pollution-free, noiseless, and operating quietly. To ensure the normal and stable operation of the fuel cell system and improve the utilization rate of hydrogen, a hydrogen recovery device is usually used to recycle hydrogen. However, in existing hydrogen recovery devices, because the water inlet tank is connected to the battery body and the hydrogen pipeline, when water is introduced into the water inlet tank and hydrogen is discharged into the hydrogen pipeline for reuse, water may enter the battery body, compressing the hydrogen and oxygen and preventing them from reacting normally, thus affecting the power generation effect of the hydrogen fuel cell. Utility Model Content

[0003] To overcome the above-mentioned defects, this utility model provides a hydrogen recovery device for hydrogen fuel cells. It solves the problem that when the hydrogen recovery device is in use, because the water inlet tank is connected to the battery body and the hydrogen pipe, water may enter the battery body when water is introduced into the water inlet tank and hydrogen is discharged into the hydrogen pipe for reuse. This water may compress the hydrogen and oxygen, causing the hydrogen and oxygen to fail to react normally and affecting the power generation effect of the hydrogen fuel cell.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a hydrogen recovery device for a hydrogen fuel cell, comprising a battery body, a connecting pipe fixedly connected to the bottom of one side of the battery body, a first one-way valve provided outside the connecting pipe, a water inlet tank provided on the side of the connecting pipe away from the battery body, a through groove opened in the inner wall of the water inlet tank, the through groove communicating with the connecting pipe, a curved pipe provided at the bottom of the through groove, a water pump installed through the curved pipe passing through the water inlet tank, a water storage tank provided on one side of the water pump, a floating ball movably connected to the inner wall of the through groove, a riser pipe provided at the top of the through groove, and a second one-way valve installed outside the riser pipe.

[0005] As a further embodiment of this utility model: a dehumidification box is fixedly connected to the top of the riser pipe, and an air inlet pipe is provided on the top of the dehumidification box.

[0006] As a further embodiment of this utility model: two mounting frames are installed on the inner wall of the dehumidification box, and a mounting base is slidably connected between the two mounting frames.

[0007] As a further embodiment of this utility model: a water-absorbing plate is installed on the inner wall of the mounting base, and a handle is fixedly connected to one side of the mounting base.

[0008] As a further embodiment of this utility model: an oxygen pipe is installed on one side of the battery body, and a hydrogen pipe is provided on the side of the battery body away from the oxygen pipe, and the hydrogen pipe is connected to the air inlet pipe.

[0009] As a further embodiment of this utility model: a negative terminal is provided on the top of the battery body, and a positive terminal is fixedly connected to the top of the battery body.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] This hydrogen recovery device for hydrogen fuel cells incorporates a water pump, a curved pipe, a first one-way valve, and a channel. When hydrogen from the channel is discharged into a hydrogen pipe for reuse, the first one-way valve is closed. The water pump then pumps water from the storage tank through the curved pipe into the channel. This water carries hydrogen towards the riser pipe at the top of the channel, simultaneously moving a floating ball upwards. This allows the floating ball to rest against the bottom of the riser pipe after the hydrogen is discharged from the channel, preventing water from entering the riser pipe and thus avoiding water entering the battery body and affecting the normal reaction between hydrogen and oxygen, thereby improving the battery's power generation efficiency.

[0012] This hydrogen recovery device for hydrogen fuel cells incorporates a dehumidification chamber, a riser pipe, a mounting base, and a water absorption plate. Hydrogen enters the dehumidification chamber through the riser pipe and continues to rise within the chamber, allowing it to pass through the water absorption plate inside the mounting base. The water absorption plate filters and absorbs the moisture carried by the hydrogen, ensuring that the hydrogen enters the fuel cell dry for reaction, thus improving the hydrogen power generation efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional structural diagram of the water inlet tank and the water storage tank of this utility model;

[0015] Figure 3 This is a cross-sectional structural diagram of the dehumidification box and hydrogen pipe of this utility model;

[0016] In the diagram: 1. Battery body; 2. Connecting pipe; 3. First one-way valve; 4. Water inlet tank; 5. Through groove; 6. Curved pipe; 7. Water pump; 8. Water storage tank; 9. Float ball; 10. Ascending pipe; 11. Second one-way valve; 12. Dehumidification box; 13. Mounting frame; 14. Mounting base; 15. Water absorption plate; 16. Handle; 17. Air inlet pipe; 18. Hydrogen pipe; 19. Oxygen pipe; 20. Battery negative terminal; 21. Battery positive terminal. Detailed Implementation

[0017] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0018] like Figure 1-3 As shown, this utility model provides a technical solution: a hydrogen recovery device for a hydrogen fuel cell, including a battery body 1, a battery negative electrode 20 is provided on the top of the battery body 1, and a battery positive electrode 21 is fixedly connected to the top of the battery body 1. By providing the battery negative electrode 20, the battery body 1 can discharge to the outside through the battery negative electrode 20 and the battery positive electrode 21, thereby realizing the normal use of the battery body 1.

[0019] A connecting pipe 2 is fixedly connected to the bottom of one side of the battery body 1. A first one-way valve 3 is installed outside the connecting pipe 2. A water inlet tank 4 is installed on the side of the connecting pipe 2 away from the battery body 1. A through groove 5 is opened on the inner wall of the water inlet tank 4. The through groove 5 is connected to the connecting pipe 2. A curved pipe 6 is installed at the bottom of the through groove 5. A water pump 7 is installed through the curved pipe 6 and a water storage tank 8 is installed on one side of the water pump 7. A floating ball 9 is movably connected to the inner wall of the through groove 5. By setting the curved pipe 6, some water can remain after the water flows back into the water storage tank 8, thereby blocking hydrogen and ensuring that hydrogen will not enter the water storage tank 8 through the curved pipe 6.

[0020] A riser pipe 10 is installed at the top of the channel 5. A dehumidification box 12 is fixedly connected to the top of the riser pipe 10. An air inlet pipe 17 is installed at the top of the dehumidification box 12. Two mounting frames 13 are installed on the inner wall of the dehumidification box 12. A mounting seat 14 is slidably connected between the two mounting frames 13. By setting the mounting frames 13, the mounting seat 14 is slid into the space between the two mounting frames 13, thereby enabling the mounting frames 13 and the water absorption plate 15 to be quickly installed inside the dehumidification box 12.

[0021] A water-absorbing plate 15 is installed on the inner wall of the mounting base 14. A handle 16 is fixedly connected to one side of the mounting base 14. By setting the handle 16, pulling the handle 16 can drive the mounting base 14 to slide out of the mounting frame 13, thereby realizing the quick disassembly of the mounting base 14 and the dehumidification box 12, which facilitates the maintenance of the water-absorbing plate 15 on the mounting base 14.

[0022] A second one-way valve 11 is installed outside the riser pipe 10. An oxygen pipe 19 is installed on one side of the battery body 1. A hydrogen pipe 18 is provided on the side of the battery body 1 away from the oxygen pipe 19. The hydrogen pipe 18 is connected to the air inlet pipe 17. By setting the air inlet pipe 17 and connecting it with the hydrogen pipe 18, the air inlet pipe 17 can allow the recovered hydrogen to be reintroduced into the battery body 1 along with the normally introduced hydrogen.

[0023] The working principle of this utility model is as follows:

[0024] In use, hydrogen and oxygen are introduced into the battery body 1 through hydrogen pipe 18 and oxygen pipe 19, causing them to react and generate electricity inside the battery body 1. After power generation, any remaining hydrogen can be channeled through connecting pipe 2 into the channel 5 inside the water inlet tank 4. When hydrogen needs to be recycled, the first one-way valve 3 is closed, and the water pump 7 is started. The water pump 7 draws water from the water storage tank 8 into the channel 5 through the curved pipe 6, causing the water in the channel 5 to carry the hydrogen upwards. As the water level rises, the hydrogen flows from the water inlet tank 4 into the channel 5. As the floating ball 9 moves upward, the hydrogen gas is introduced into the riser pipe 10 by the water. The floating ball 9 can then rest against the bottom of the riser pipe 10, thus isolating the riser pipe 10 from the channel 5. The hydrogen gas entering the riser pipe 10 continues to move upward into the dehumidification box 12, allowing the water absorption plate 15 inside the dehumidification box 12 to dehumidify the hydrogen gas. Subsequently, the hydrogen gas enters the hydrogen gas pipe 18 through the air inlet pipe 17 and is input into the battery body 1 together with the normally introduced hydrogen gas to generate electricity.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A hydrogen recovery device for a hydrogen fuel cell, comprising a cell body (1), characterised in that: A connecting pipe (2) is fixedly connected to the bottom of one side of the battery body (1). A first one-way valve (3) is provided outside the connecting pipe (2). A water inlet tank (4) is provided on the side of the connecting pipe (2) away from the battery body (1). A through groove (5) is opened on the inner wall of the water inlet tank (4). The through groove (5) is connected to the connecting pipe (2). A curved pipe (6) is provided at the bottom of the through groove (5). A water pump (7) is installed through the curved pipe (6) through the water inlet tank (4). A water storage tank (8) is provided on one side of the water pump (7). A floating ball (9) is movably connected to the inner wall of the through groove (5). A riser pipe (10) is provided at the top of the through groove (5). A second one-way valve (11) is installed outside the riser pipe (10).

2. The hydrogen recovery device for a hydrogen fuel cell according to claim 1, characterized by: The top of the riser pipe (10) is fixedly connected to a dehumidification box (12), and the top of the dehumidification box (12) is provided with an air inlet pipe (17).

3. The hydrogen recovery device for a hydrogen fuel cell according to claim 2, characterized by: The inner wall of the dehumidification box (12) is equipped with two mounting frames (13), and a mounting base (14) is slidably connected between the two mounting frames (13).

4. The hydrogen recovery device for a hydrogen fuel cell according to claim 3, characterized by: The inner wall of the mounting base (14) is equipped with a water-absorbing plate (15), and a handle (16) is fixedly connected to one side of the mounting base (14).

5. The hydrogen recovery device for a hydrogen fuel cell according to claim 2, characterized by: An oxygen pipe (19) is installed on one side of the battery body (1), and a hydrogen pipe (18) is provided on the side of the battery body (1) away from the oxygen pipe (19). The hydrogen pipe (18) is connected to the air inlet pipe (17).

6. The hydrogen recovery device for a hydrogen fuel cell according to claim 1, characterized by: The battery body (1) has a negative electrode (20) on its top and a positive electrode (21) fixedly connected to its top.

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