Valve body assembly and hydrogen production system thereof

Abstract

The utility model relates to the technical field of water electrolysis hydrogen production, in particular to a valve body assembly and a hydrogen production system thereof. The valve body assembly comprises a valve body seat and a plurality of valve bodies, the valve body seat is provided with a gas inlet channel, and hydrogen generated in the hydrogen production system can enter the valve body assembly through the gas inlet channel; the multiple valve bodies are fixed to the valve body seat and communicate with the air inlet channel, and the multiple valve bodies are arranged in parallel. According to the valve body assembly, the multiple valve bodies are all fixed to the valve body seat, the integration degree of the valve body assembly is improved, the number of single control valve bodies and the number of single connecting pipes are reduced, then the occupied space of the hydrogen production system is reduced, the risk of gas leakage at the pipeline connecting position is reduced, and the safety of the hydrogen production system is improved; meanwhile, the multiple valve bodies are communicated with the gas inlet channel, the multiple valve bodies are arranged in parallel, gas can flow to the multiple valve bodies at the same time through the gas inlet channel, even if one valve body goes wrong, other valve bodies can still work normally, and the stability of the system is guaranteed.

Description

Technical Field

[0001] This application relates to the field of water electrolysis for hydrogen production technology, specifically to a valve body assembly and its hydrogen production system. Background Technology

[0002] Electrolysis of water to produce hydrogen is a hydrogen production technology that has attracted much attention in recent years. This system uses a proton exchange membrane as the electrolysis medium. Under the condition of electricity, water molecules are decomposed into hydrogen and oxygen, thus realizing clean and efficient hydrogen production.

[0003] In related technologies, the valve body is a key component of a hydrogen production system. On the one hand, the valve body can be used for pipeline distribution, aggregation, and switching; on the other hand, it can be combined with components such as insertion sensors and pipe fittings to form control valve assemblies with different functions. The valve body can serve as a carrier for other components and as a connector between different pipelines. However, complex hydrogen production systems typically contain a large number of single-function control valve bodies, which are connected by connecting pipes. This pipeline connection method tends to increase the number of control valve bodies and connecting pipes, resulting in a large footprint for the hydrogen production system and increasing the risk of gas leakage at pipeline connections, which is detrimental to improving the safety performance of the hydrogen production system. Utility Model Content

[0004] The embodiments of this application provide a valve body assembly and a hydrogen production system thereof, which can solve the technical problem that in complex hydrogen production systems, there are usually a large number of single-function control valve bodies connected by connecting pipes. This pipe connection method tends to increase the number of control valve bodies and connecting pipes, resulting in a large space occupation of the hydrogen production system and increasing the risk of gas leakage at the pipe connections, which is not conducive to improving the safety performance of the hydrogen production system.

[0005] In a first aspect, embodiments of this application provide a valve body assembly applied in a hydrogen production system, comprising:

[0006] Valve body seat, the valve body seat having an air inlet passage;

[0007] Multiple valve bodies are fixed to the valve body seat, and each valve body is connected to the air intake channel. The multiple valve bodies are arranged in parallel.

[0008] In one embodiment, the valve body assembly further includes a plurality of exhaust channels, each of which corresponds to a plurality of valve bodies, and the exhaust channels are connected to the intake channels through the corresponding valve bodies;

[0009] At least two of the exhaust passages are interconnected, and at least two of the exhaust passages are separated from each other.

[0010] In one embodiment, the valve body includes a first valve body, a second valve body, and a third valve body;

[0011] The exhaust passage includes a first exhaust passage, a second exhaust passage, and a third exhaust passage;

[0012] The first exhaust passage is connected to the intake passage through the first valve body, the second exhaust passage is connected to the intake passage through the second valve body, and the third exhaust passage is connected to the intake passage through the third valve body;

[0013] The valve body seat is provided with a first interface and a second interface. The first exhaust channel is connected to the first interface, and the second exhaust channel and the third exhaust channel are both connected to the second interface.

[0014] In one embodiment, the second exhaust passage is connected to the second interface, the third exhaust passage is connected to the second exhaust passage, and the second interface is connected to the outside atmosphere;

[0015] The second valve body is used to open or close the intake passage and the second exhaust passage;

[0016] The third valve body is used to open and connect the air intake channel and the third exhaust channel when the pressure in the hydrogen production system exceeds a preset safety value, so that some of the hydrogen in the hydrogen production system can be released into the atmosphere through the air intake channel and the third exhaust channel to reduce the pressure of the hydrogen production system.

[0017] In one embodiment, the valve body seat is further provided with a third interface, which is connected to the second exhaust channel. One end of the third exhaust channel is connected to the third interface, and the other end is connected to the air outlet of the third valve body.

[0018] In one embodiment, the first exhaust passage and the second exhaust passage are separated from each other, and the first exhaust passage is connected to the hydrogen storage device through the first interface.

[0019] In one embodiment, the first valve body has a first valve body inlet and a first valve body outlet, the inlet channel is connected to the first valve body inlet, and the first exhaust channel is connected to the first valve body outlet.

[0020] The ventilation area of ​​at least one of the first valve body inlet and the first valve body outlet is adjustable to change the pressure difference on both sides of the first valve body.

[0021] In one embodiment, at least one of the valve bodies is detachably connected to the valve body seat.

[0022] In one embodiment, at least one of the valve bodies is an electric valve body, and the electric valve body is provided with a plug for electrical connection with the controller of the hydrogen production system.

[0023] Secondly, embodiments of this application provide a hydrogen production system, including the valve body assembly described above.

[0024] The beneficial effects of the embodiments of this application are as follows:

[0025] The valve body assembly in this embodiment includes a valve body seat and multiple valve bodies. The valve body seat has an air inlet channel, through which hydrogen generated in the hydrogen production system can enter the valve body assembly. Multiple valve bodies are fixed to the valve body seat, each connected to an air inlet channel, and are arranged in parallel. In this application, on the one hand, multiple valve bodies are fixed to the valve body seat, improving the integration of the valve body assembly and reducing the number of individual control valve bodies. On the other hand, traditionally, multiple separately configured control valve bodies require multiple corresponding connecting pipes to deliver hydrogen to a specific control valve body. However, in this embodiment, the air inlet channels are connected to multiple valve bodies, requiring only one connecting pipe connected to the air inlet channel to deliver hydrogen to multiple valve bodies, reducing the number of connecting pipes and thus reducing the space occupied by the hydrogen production system. Simultaneously, since the connection points between the connecting pipes and the valve bodies are potential sources of gas leakage, reducing the number of connecting pipes reduces the number of connection points, thereby reducing the risk of gas leakage at pipeline connections and improving the safety of the hydrogen production system. On the other hand, multiple valve bodies are connected to the intake channel respectively, and the multiple valve bodies are arranged in parallel, so that gas can flow to multiple valve bodies simultaneously through the intake channel. Even if one valve body has a problem, the other valve bodies can still work normally, ensuring the stability of the system. In addition, the parallel arrangement of multiple valve bodies provides greater flexibility. Users can open or close specific valve bodies as needed to adapt to different operating conditions or flow requirements. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural schematic diagram of the valve body assembly provided in an embodiment of this application;

[0028] Figure 2 This is a three-dimensional structural schematic diagram of the valve body assembly provided in an embodiment of this application from another angle;

[0029] Figure 3This is a top view of the valve body assembly provided in an embodiment of this application;

[0030] Figure 4 This is a schematic diagram of the air intake passage of the valve body assembly provided in an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of the air intake passage, the first exhaust passage, and the second exhaust passage of the valve body assembly provided in the embodiments of this application;

[0032] Figure 6 This is a schematic diagram of the air intake passage, the second exhaust passage, and the third exhaust passage of the valve body assembly provided in the embodiments of this application;

[0033] Figure 7 This is a schematic diagram of the air intake passage, the first exhaust passage, the second exhaust passage, and the third exhaust passage of the valve body assembly provided in the embodiments of this application.

[0034] Figure label:

[0035] 100. Valve body assembly; 1. Valve body seat; 11. Inlet passage; 12. First interface; 13. Second interface; 14. Third interface; 15. Main air inlet; 2. First valve body; 21. First valve body air inlet; 22. First valve body air outlet; 3. Second valve body; 31. Second valve body air inlet; 32. Second valve body air outlet; 4. Third valve body; 41. Third valve body air inlet; 42. Third valve body air outlet; 5. First exhaust passage; 6. Second exhaust passage; 7. Third exhaust passage; 8. Plug. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0037] Please refer to Figures 1 to 4The valve body assembly 100 of this application is applied to a hydrogen production system. The valve body assembly 100 includes: a valve body seat 1 and a plurality of valve bodies. The valve body seat 1 has an air inlet channel 11 through which hydrogen generated in the hydrogen production system can enter the valve body assembly 100. The plurality of valve bodies are fixed to the valve body seat 1, and the plurality of valve bodies are respectively connected to the air inlet channel 11 and are arranged in parallel. In this application, on the one hand, multiple valve bodies are fixed on the valve body seat 1, improving the integration of the valve body assembly 100 and reducing the number of individual control valve bodies; on the other hand, traditionally, multiple separately configured control valve bodies require multiple corresponding connecting pipes to deliver hydrogen to a specific control valve body. However, in this embodiment, the air inlet channel 11 is connected to multiple valve bodies, so only one connecting pipe connected to the air inlet channel 11 is needed to deliver hydrogen to multiple valve bodies, reducing the number of connecting pipes and thus reducing the space occupied by the hydrogen production system. At the same time, since the connection point between the connecting pipe and the valve body is a potential source of gas leakage, reducing the number of connecting pipes can reduce the number of connection points, thereby reducing the risk of gas leakage at the pipeline connection and improving the safety of the hydrogen production system. On the other hand, multiple valve bodies are connected to the intake channel 11 respectively, and the multiple valve bodies are arranged in parallel, so that gas can flow to multiple valve bodies simultaneously through the intake channel 11. Even if one valve body has a problem, the other valve bodies can still work normally, ensuring the stability of the system. In addition, the parallel arrangement of multiple valve bodies provides greater flexibility. Users can open or close specific valve bodies as needed to adapt to different operating conditions or flow requirements.

[0038] In this embodiment, the shape of the valve body seat 1 is not limited; it can be a cuboid, cylinder, L-shaped block, or other shape. The material of the valve body seat 1 is not limited; it can be made of stainless steel, copper alloy, or other metal materials, or of polypropylene, polyethylene, or other plastic materials. The shape and cross-sectional shape of the air intake channel 11 are not limited; it can be straight, S-shaped, L-shaped, U-shaped, or other shapes, and its cross-sectional shape can be circular, square, triangular, or other shapes. The number of valve bodies is not limited; it can be two, three, or more. The type of valve body is not limited; it can be a vent valve, proportional valve, safety valve, etc., or it can be an electric valve body, pneumatic valve body, manual valve body, self-operated valve body, etc. The connection method between the valve body and the valve body seat 1 is also not limited; they can be connected by welding, riveting, screws, etc.

[0039] In one embodiment, please refer to Figure 7The valve body assembly 100 also includes multiple exhaust channels, each corresponding to a specific valve body. These exhaust channels are connected to the intake channel 11 via their respective valve bodies. During hydrogen production, different exhaust paths may need to be selected based on different operational stages (such as startup, operation, and shutdown). Multiple exhaust channels and their corresponding valve bodies can be independently controlled as needed, enabling the selection of different exhaust paths and facilitating flexible response of the hydrogen production system to various operating conditions. Furthermore, each exhaust channel is controlled by an independent valve body, preventing system failure due to a single exhaust channel malfunction. Additionally, at least two exhaust channels are interconnected, allowing continued exhaust through other channels in case of a malfunction in one exhaust channel or valve body, thus improving system safety. At least two exhaust channels are also separated, allowing independent operation based on different exhaust requirements, enabling the valve body assembly 100 to meet diverse operating conditions and enhancing its practicality and flexibility. In this embodiment, the shape of the exhaust channels and their cross-sectional shape are not limited. The exhaust channel shape can be straight, S-shaped, L-shaped, U-shaped, or other shapes, and the cross-sectional shape can be circular, square, triangular, or other shapes.

[0040] In one embodiment, please refer to Figure 7 The valve body includes a first valve body 2, a second valve body 3, and a third valve body 4; the exhaust channels include a first exhaust channel 5, a second exhaust channel 6, and a third exhaust channel 7; the first exhaust channel 5 is connected to the intake channel 11 through the first valve body 2, the second exhaust channel 6 is connected to the intake channel 11 through the second valve body 3, and the third exhaust channel 7 is connected to the intake channel 11 through the third valve body 4; the valve body seat 1 has a main intake port 15, a first interface 12, and a second interface 13. The intake channel 11 is connected to the main intake port 15, the first exhaust channel 5 is connected to the first interface 12, and the second exhaust channel 6 and the third exhaust channel 7 are both connected to the second interface 13. In this embodiment, the first exhaust channel 5 is connected to the first interface 12, and the second exhaust channel 6 and the third exhaust channel 7 are both connected to the second interface 13. The three exhaust channels use two interfaces, which can reduce the number of interfaces and connecting components such as pipes and joints connected to the interfaces, reduce manufacturing costs, simplify the pipeline layout of the hydrogen production system, reduce the space occupied by the pipelines, and improve the compactness and space utilization of the hydrogen production system. In this embodiment, the first valve body 2, the second valve body 3, and the third valve body 4 can be made of alkali-resistant materials such as stainless steel and copper alloy, and no limitation is made here.

[0041] In one embodiment, please refer to Figure 6The second exhaust passage 6 is connected to the second interface 13, the third exhaust passage 7 is connected to the second exhaust passage 6, and the second interface 13 is connected to the external atmosphere. The second valve body 3 is used to open or close the intake passage 11 and the second exhaust passage 6. Specifically, the second valve body 3 has a second valve body inlet 31 and a second valve body outlet 32. The intake passage 11 is connected to the second valve body inlet 31, and the second exhaust passage 6 is connected to the second valve body outlet 32. In this embodiment, when the hydrogen production system is working normally, the second valve body 3 is normally closed. When the hydrogen production system needs to be emptied due to shutdown, maintenance, or emergency, the second valve body 3 can be opened to allow the hydrogen in the hydrogen production system to pass through the intake passage 11, the second valve body inlet 31, the second valve body outlet 32, the second exhaust passage 6, and the second interface 13 in sequence and then be quickly discharged into the atmosphere to achieve hydrogen venting, prevent hydrogen accumulation in the hydrogen production system from causing explosion or fire risks, and reduce safety risks. In this embodiment, the type of the second valve body 3 is not limited. The second valve body 3 can be a solenoid valve, a pneumatic valve, or other types of valve bodies.

[0042] In one embodiment, please refer to Figure 1 and Figure 6 The second exhaust passage 6 is connected to the second interface 13, the third exhaust passage 7 is connected to the second exhaust passage 6, and the second interface 13 is connected to the external atmosphere. Specifically, the third valve body 4 has a third valve body inlet 41 and a third valve body outlet 42. The inlet passage 11 is connected to the third valve body inlet 41, and the third exhaust passage 7 is connected to the third valve body outlet 42. When the hydrogen production system is working normally, the third valve body 4 is in a normally closed state. When the pressure in the hydrogen production system exceeds the preset safety value, the third valve body 4 opens and connects the inlet passage 11 and the third exhaust passage 7, so that some of the hydrogen in the hydrogen production system can be released into the atmosphere in sequence through the inlet passage 11, the third valve body inlet 41, the third valve body outlet 42, the third exhaust passage 7, the second exhaust passage 6, and the second interface 13, thereby reducing the pressure of the hydrogen production system, preventing the hydrogen production system from being damaged or exploded due to overpressure, and ensuring the safe operation of the hydrogen production system. In this embodiment, the type of the third valve body 4 is not limited. The third valve body 4 can be a spring-loaded pressure relief valve, a balanced pressure relief valve, a solenoid pressure relief valve, etc.

[0043] In one embodiment, please refer to Figure 1 and Figure 6The valve body seat 1 also has a third interface 14, which is connected to the second exhaust channel 6. One end of the third exhaust channel 7 is connected to the third interface 14, and the other end is connected to the outlet of the third valve body 4. Specifically, after hydrogen enters the inlet channel 11, it can flow sequentially through the third valve body 4, the third exhaust channel 7, the third interface 14, the second exhaust channel 6, and the second interface 13. The second valve body 3 and the third valve body 4 share a second interface 13 for exhaust, which can reduce the number of interfaces and connecting parts such as pipes and joints connected to the interfaces, reduce manufacturing costs, simplify the pipeline layout of the hydrogen production system, reduce the space occupied by the pipeline, and improve the compactness and space utilization of the hydrogen production system. In this embodiment, the third exhaust channel 7 can be a connecting pipe set outside the valve body seat 1, or the third exhaust channel 7 can be an exhaust channel set inside the valve body seat 1, which is not specifically limited here. In this embodiment, the types of the first interface 12, the second interface 13, and the third interface 14 are not limited. The first interface 12, the second interface 13, and the third interface 14 can be external thread interfaces, tapered internal thread interfaces, or other types of interfaces.

[0044] In one embodiment, please refer to Figure 5 The first exhaust channel 5 and the second exhaust channel 6 are separated from each other. The first exhaust channel 5 is connected to the hydrogen storage device through the first interface 12. In this embodiment, after hydrogen enters the inlet channel 11, it flows sequentially through the first valve body 2, the first exhaust channel 5, and the first interface 12 before entering the hydrogen storage device, thereby forming a hydrogen product. The separation between the first exhaust channel 5 and the second exhaust channel 6 can prevent impurities such as nitrogen, carbon dioxide, air, and water vapor discharged during the hydrogen venting process from entering the first exhaust channel 5 and contaminating it, thus ensuring the high purity of the hydrogen product and avoiding the impact of impurity gases on the quality of the hydrogen.

[0045] In one embodiment, please refer to Figure 7 The first valve body 2 has a first valve body inlet 21 and a first valve body outlet 22. An inlet channel 11 communicates with the first valve body inlet 21, and a first exhaust channel 5 communicates with the first valve body outlet 22. The ventilation area of ​​at least one of the first valve body inlet 21 and the first valve body outlet 22 is adjustable to change the pressure difference across the first valve body 2. In this embodiment, the first valve body 2 can change the pressure difference across its two sides by altering the ventilation area of ​​the first valve body inlet 21 and / or the first valve body outlet 22. The first valve body 2 can adjust the hydrogen output pressure according to the pressure requirements of different hydrogen storage devices, thereby meeting the pressure requirements of different hydrogen products. In this embodiment, the type of the first valve body 2 is not limited; it can be an electric proportional valve, a pneumatic proportional valve, a digital proportional valve, etc.

[0046] In one embodiment, at least one valve body is detachably connected to the valve body seat 1. In this embodiment, at least one valve body can be detachably connected to the valve body seat 1 by means of screw connection, flange connection, clamp connection, etc. The detachable connection between at least one valve body and the valve body seat 1 allows for easy separation of the valve body and the valve body seat 1, facilitating maintenance, cleaning, or replacement of the valve body.

[0047] In one embodiment, please refer to Figure 3 At least one valve body is an electric valve body, and the electric valve body is equipped with a plug 8 for electrical connection with the controller of the hydrogen production system. In this embodiment, the electric valve body can be automatically controlled by the controller, automatically adjusting the valve opening, flow rate, pressure, etc. according to the needs of the hydrogen production system. This can improve control accuracy, facilitate remote control and monitoring, reduce manual operation, reduce the risk of human error, and improve system safety.

[0048] Secondly, embodiments of this application provide a hydrogen production system, including a valve body assembly 100 as described above. The valve body assembly 100 includes a valve body seat 1 and a plurality of valve bodies. The valve body seat 1 has an air inlet channel 11, through which hydrogen generated in the hydrogen production system can enter the valve body assembly 100. The plurality of valve bodies are fixed to the valve body seat 1, and the plurality of valve bodies are respectively connected to the air inlet channel 11, and the plurality of valve bodies are arranged in parallel. In this application, multiple valve bodies are fixed on valve body seats 1, which improves the integration of valve body assembly 100, reduces the number of individual control valve bodies and connecting pipes, thereby reducing the space occupied by the hydrogen production system, reducing the risk of gas leakage at pipeline connections, and improving the safety of the hydrogen production system. At the same time, multiple valve bodies are respectively connected to the air inlet channel 11, and the multiple valve bodies are arranged in parallel, so that gas can flow to multiple valve bodies simultaneously through the air inlet channel 11. Even if one valve body malfunctions, the other valve bodies can still work normally, ensuring the stability of the hydrogen production system. In addition, the parallel arrangement of multiple valve bodies provides greater flexibility. Users can open or close specific valve bodies as needed to adapt to different operating conditions or flow requirements.

[0049] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A valve body assembly used in a hydrogen production system, characterized in that, Comprising: a valve body seat, the valve body seat having an air inlet channel; a plurality of valve bodies, the plurality of valve bodies being fixed to the valve body seat, the plurality of valve bodies being respectively in communication with the air inlet channel, and the plurality of valve bodies being arranged in parallel with each other.

2. The valve body assembly according to claim 1, wherein the valve body assembly further comprises a plurality of air outlet channels, the plurality of air outlet channels respectively corresponding to the plurality of valve bodies, the air outlet channels being capable of being in communication with the air inlet channel through the corresponding valve bodies; at least two of the air outlet channels are in communication with each other, and at least two of the air outlet channels are separated from each other.

3. The valve body assembly according to claim 2, wherein the valve bodies comprise a first valve body, a second valve body, and a third valve body; the air outlet channels comprise a first air outlet channel, a second air outlet channel, and a third air outlet channel; the first air outlet channel is in communication with the air inlet channel through the first valve body, the second air outlet channel is in communication with the air inlet channel through the second valve body, and the third air outlet channel is in communication with the air inlet channel through the third valve body; the valve body seat is provided with a first interface and a second interface, the first air outlet channel is in communication with the first interface, and the second air outlet channel and the third air outlet channel are both in communication with the second interface.

4. The valve body assembly according to claim 3, wherein the second air outlet channel is in communication with the second interface, the third air outlet channel is in communication with the second air outlet channel, and the second interface is in communication with the external atmosphere; the second valve body is used to open or close the air inlet channel and the second air outlet channel; the third valve body is used to open and connect the air inlet channel and the third air outlet channel when the pressure in the hydrogen production system exceeds a preset safety value, so that part of the hydrogen in the hydrogen production system can be released to the atmosphere through the air inlet channel and the third air outlet channel, thereby reducing the pressure in the hydrogen production system.

5. The valve body assembly according to claim 4, wherein the valve body seat is further provided with a third interface, the third interface is in communication with the second air outlet channel, one end of the third air outlet channel is in communication with the third interface, and the other end is in communication with the air outlet of the third valve body.

6. The valve body assembly according to any one of claims 3 to 5, wherein the first air outlet channel and the second air outlet channel are separated from each other, and the first air outlet channel is in communication with a hydrogen storage device through the first interface.

7. The valve body assembly according to claim 6, wherein the first valve body has a first valve body air inlet and a first valve body air outlet, the air inlet channel is in communication with the first valve body air inlet, and the first air outlet channel is in communication with the first valve body air outlet; the air passage area of at least one of the first valve body air inlet and the first valve body air outlet is adjustable, so as to change the pressure difference on both sides of the first valve body.

8. The valve body assembly according to any one of claims 1 to 5, wherein at least one of the valve bodies is detachably connected to the valve body seat.

9. The valve body assembly according to any one of claims 1 to 5, wherein At least one of the valve bodies is an electric valve body, and a plug is arranged on the electric valve body, and the plug is electrically connected with a controller of the hydrogen production system.

10. A hydrogen production system, characterized by, The valve body assembly comprises the valve body assembly according to any one of claims 1 to 9.

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