Liquid supply device for hydrogen production system

Abstract

The application discloses a liquid supply device for a hydrogen production system, comprising a water storage tank and a water inlet control assembly. The water storage tank is provided with a first channel, a second channel and a third channel. The outlet end of the first channel is in communication with the inlet end of the second channel and the third channel. The outlet end of the second channel is in communication with the water storage cavity of the water storage tank. The outlet end of the third channel is in communication with the outside of the water storage tank. The water inlet control assembly comprises a first controller, a water quality detection element arranged in the first channel, and a control valve group arranged in the second channel and the third channel. The first controller is electrically connected with the water quality detection element to determine whether the water quality of the first channel is qualified according to a detection signal. The first controller is electrically connected with the control valve group and has a first state of conducting the second channel and closing the third channel when the water quality is qualified, and a second state of closing the second channel and conducting the third channel when the water quality is unqualified. The application solves the problem that the hydrogen production system is difficult to automatically shunt based on water quality detection, and the liquid supply efficiency is low.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production technology, and more specifically, to a liquid supply device for a hydrogen production system. Background Technology

[0002] Currently, hydrogen production systems use a single inlet pipe to directly deliver deionized water to the storage tank, making it impossible to effectively screen and treat the deionized water in the inlet pipe based on its quality. Although conductivity sensors are installed in the inlet pipe to detect the conductivity of the deionized water, when abnormal water quality is detected based on conductivity, alarms are often triggered, requiring manual intervention, resulting in low supply efficiency for the hydrogen production system. Utility Model Content

[0003] The main objective of this invention is to provide a liquid supply device for a hydrogen production system, which at least solves the problem that the liquid supply device of the hydrogen production system uses a single water inlet pipe, making it difficult to automatically divert the liquid based on water quality detection, resulting in relatively low liquid supply efficiency.

[0004] According to one aspect of the present invention, a liquid supply device for a hydrogen production system is provided, comprising:

[0005] A water storage tank is provided with a water storage cavity inside the water storage tank and a water control channel is provided on the water storage tank. The water control channel includes a first channel, a second channel, and a third channel. The first channel, the second channel, and the third channel have an inlet end and an outlet end that are respectively arranged opposite to each other. The inlet end of the first channel is connected to an external water supply device. The outlet end of the first channel is connected to the inlet end of the second channel and the inlet end of the third channel, respectively. The outlet end of the second channel is connected to the water storage cavity. The outlet end of the third channel is connected to the outside of the water storage tank.

[0006] A water inlet control assembly includes a water quality detection element, a control valve assembly, and a first controller. The water quality detection element is disposed in the first channel, and the control valve assembly is disposed in the second and third channels. The first controller is electrically connected to the water quality detection element to determine whether the water quality in the first channel is qualified based on the feedback signal from the water quality detection element. The first controller is electrically connected to the control valve assembly and has a first state where, when the water quality in the first channel is qualified, the first controller controls the control valve assembly to open the second channel and close the third channel; and a second state where, when the water quality in the first channel is unqualified, the first controller controls the control valve assembly to close the second channel and open the third channel.

[0007] Furthermore, the water storage tank includes a top cover and a tank body. The top cover is disposed on the top of the tank body and surrounds the tank body to form the water storage cavity. Along the height direction of the tank body, the second channel is disposed close to the top cover and communicates with the water storage cavity. The first channel communicates with the second channel, and the third channel communicates with the second channel.

[0008] Furthermore, the water quality detection element includes a conductivity detector, which is disposed in the first channel to detect the conductivity of the water in the first channel. When the conductivity of the water in the first channel is less than or equal to a preset conductivity, the first controller is in the first state, and when the conductivity of the water in the first channel is greater than the preset conductivity, the first controller is in the second state.

[0009] Furthermore, the control valve assembly includes a first solenoid valve and a second solenoid valve. The first solenoid valve is disposed in the second channel and electrically connected to the first controller. The second solenoid valve is disposed in the third channel and electrically connected to the first controller. When the first controller is in the first state, it is configured to control the first solenoid valve to open and simultaneously control the second solenoid valve to close. When the first controller is in the second state, it is configured to control the first solenoid valve to close and simultaneously control the second solenoid valve to open.

[0010] Furthermore, the water inlet control assembly also includes a manual regulating valve, which is disposed in the second channel and located between the first solenoid valve and the outlet end of the second channel.

[0011] Furthermore, the liquid supply device also includes a heating control component, which includes a heating element, a liquid level detection element, and a second controller. The heating element is at least partially disposed in the water storage chamber, and the liquid level detection element is disposed in the water storage chamber and is used at least to detect the liquid level in the water storage chamber. The heating element and the liquid level detection element are electrically connected to the second controller, and the liquid level detection element sends the detected liquid level to the second controller. The second controller controls the heating element based on the liquid level.

[0012] Furthermore, the water storage tank is provided with a liquid level detection channel, which includes a first pipe and a second pipe. Along the height direction of the tank body, the first pipe is located near the top cover, and the second pipe is located near the bottom wall of the tank body.

[0013] The liquid level detection component includes:

[0014] A first pressure detection element is disposed in the first pipeline to detect the pressure inside the first pipeline.

[0015] A second pressure detection element is disposed in the second pipeline to detect the pressure inside the second pipeline;

[0016] The calculation module is electrically connected to the first pressure detection device, the second pressure detection device, and the second controller. The calculation module calculates the liquid level height based on the signals transmitted by the first pressure detection device and the second pressure detection device, and transmits the liquid level height to the second controller.

[0017] Furthermore, the tank body is provided with a pressure relief channel connecting the water storage chamber to the outside of the water storage tank. The pressure relief channel is provided with a pressure relief component, which is configured to relieve pressure in the water storage chamber when the air pressure in the water storage chamber is greater than a preset air pressure.

[0018] Furthermore, the pressure relief assembly includes a pressure detection element, which is disposed within the pressure relief channel and is at least used to detect the pressure in the water storage chamber. The pressure relief assembly has a non-pressure relief state where the pressure in the water storage chamber is less than or equal to a predetermined pressure, and a pressure relief state where the pressure in the water storage chamber is greater than the predetermined pressure, and a pressure relief state where the pressure relief channel is opened. When the pressure in the water storage chamber is greater than the predetermined pressure and there is a pressure difference with the outside of the water storage tank, the pressure relief assembly deforms from the non-pressure relief state to the pressure relief state under the action of the pressure difference.

[0019] Furthermore, the pressure relief channel includes a third pipe and a fourth pipe, and the pressure relief assembly includes an installation component, a rupture component, and a third controller. An installation channel is provided through the installation component. The third pipe and the fourth pipe are respectively connected to opposite sides of the installation component and communicate with the installation channel. The end of the third pipe away from the installation component communicates with the water storage tank, and the end of the fourth pipe away from the installation component communicates with the outside of the water storage tank. The rupture component is at least partially disposed within the installation channel and seals the installation channel, allowing the third pipe and the fourth pipe to communicate. The rupture component ruptures under the pressure difference, causing the pressure relief assembly to deform from the non-pressure relief state to the pressure relief state. The third controller is electrically connected to the pressure detection component and the rupture component, respectively. The pressure detection component transmits the detected pressure to the third controller.

[0020] In this invention, an inlet control assembly consisting of a water quality detection element, a control valve group, and a first controller can monitor the deionized water quality in the first channel in real time. When the water quality is qualified, the first controller controls the control valve group to open the second channel and close the third channel, allowing qualified deionized water to flow into the storage chamber of the storage tank. When the water quality is unqualified, the control valve group closes the second channel and opens the third channel, discharging the unqualified deionized water outside the storage tank. This achieves automatic diversion of deionized water based on water quality detection results, eliminating the need for manual intervention and improving the automation level of the hydrogen production system's liquid supply device. Because it can automatically detect and divert water quality, it can promptly deliver deionized water to the storage tank when the water quality is qualified and promptly discharge unqualified water, avoiding time wasted waiting for manual processing. This ensures the continuous and stable operation of the hydrogen production system's liquid supply process, thereby improving the system's liquid supply efficiency. Since only qualified deionized water can flow into the storage chamber of the water tank, it effectively prevents unqualified deionized water from entering the water tank, ensuring the water quality of the deionized water in the water tank. This provides a qualified water source for the hydrogen production system, which is conducive to the stable operation of the hydrogen production system and reduces the adverse effects of water quality problems on the hydrogen production system. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the liquid supply device for a hydrogen production system disclosed in an embodiment of the present invention from a first-view perspective.

[0023] Figure 2 for Figure 1 An enlarged diagram of A in the diagram;

[0024] Figure 3 This is a schematic diagram of the liquid supply device for a hydrogen production system disclosed in an embodiment of the present invention from a second perspective.

[0025] Figure 4 Book Figure 3 An enlarged diagram of B in the diagram;

[0026] Figure 5 A schematic diagram of the liquid supply device for a hydrogen production system from a third-view perspective, as disclosed in this embodiment of the present invention.

[0027] Figure 6 Book Figure 5 An enlarged diagram of C in the diagram;

[0028] Figure 7Exploded view of the pressure relief channel and pressure relief assembly disclosed in this embodiment of the utility model.

[0029] The above figures include the following reference numerals:

[0030] 10. Water storage tank; 11. Water control channel; 111. First channel; 112. Second channel; 113. Third channel; 12. Top cover; 13. Tank body; 20. Water inlet control assembly; 21. Water quality detection element; 22. Control valve assembly; 221. First solenoid valve; 222. Second solenoid valve; 23. Manual regulating valve; 30. Heating control assembly; 31. Heating component; 32. Liquid level detection component; 321. Second pressure detection element; 33. Liquid level detection channel; 331. First pipeline; 332. Second pipeline; 40. Pressure relief channel; 41. Third pipeline; 42. Fourth pipeline; 50. Pressure relief assembly; 51. Installation component; 511. Installation channel; 52. Bursting component. Detailed Implementation

[0031] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0034] See Figures 1 to 7As shown in the embodiment of this application, a liquid supply device for a hydrogen production system is provided, including a water storage tank 10 and a water inlet control component 20. The water storage tank 10 has a water storage chamber and a water control channel 11, which includes a first channel 111, a second channel 112, and a third channel 113. The first channel 111, second channel 112, and third channel 113 each have an inlet end and an outlet end arranged opposite to each other. The inlet end of the first channel 111 is connected to an external water supply device, and the outlet end of the first channel 111 is connected to the inlet ends of the second channel 112 and the third channel 113, respectively. The outlet end of the second channel 112 is connected to the water storage chamber, and the outlet end of the third channel 113 is connected to the outside of the water storage tank 10. The water inlet control assembly 20 includes a water quality detection element 21, a control valve assembly 22, and a first controller. The water quality detection element 21 is disposed in the first channel 111, and the control valve assembly 22 is disposed in the second channel 112 and the third channel 113. The first controller is electrically connected to the water quality detection element 21 to determine whether the water quality in the first channel 111 is qualified based on the feedback signal from the water quality detection element 21. The first controller is electrically connected to the control valve assembly 22. The first controller has a first state where it controls the control valve assembly 22 to open the second channel 112 and close the third channel 113 when the water quality in the first channel 111 is qualified, and a second state where it controls the control valve assembly 22 to close the second channel 112 and open the third channel 113 when the water quality in the first channel 111 is unqualified.

[0035] In this embodiment, the water storage chamber of the water storage tank 10 is used to store water for hydrogen electrolysis. The hydrogen production system uses deionized water (near-pure water obtained by removing ionic impurities from the water). A water inlet channel is formed between the first channel 111 and the second channel 112 on the water storage tank 10, and a drainage channel is formed between the first channel 111 and the third channel 113. A water quality detection element 21 is installed in the first channel 111. Regardless of whether the deionized water enters the water storage chamber of the water storage tank 10 through the water inlet channel or is discharged to the outside of the water storage tank 10 through the drainage channel, the deionized water must pass through the water quality detection element 21 in the first channel 111. Therefore, as long as deionized water flows through the first channel 111, the water quality detection element 21 can detect the water quality data of the deionized water flowing into the first channel 111. Then, the water quality detection element 21 transmits the detected water quality data to the first controller. The first controller judges whether the water quality of the deionized water entering the first channel 111 is qualified based on the preset water quality qualification standard and the received water quality data. When the deionized water entering the first channel 111 and passing through the water quality detection element 21 is deemed to be of acceptable quality, the first controller is in its first state. The second channel 112 is open and the third channel 113 is closed. At this time, the inlet channel is open, while the outlet channel is closed. Therefore, the acceptable water enters the storage chamber of the storage tank 10 through the inlet channel and is used for hydrogen electrolysis. When the deionized water entering the first channel 111 and passing through the water quality detection element 21 is deemed to be of unacceptable quality, the first controller switches from the first state to the second state. The second channel 112 is closed and the third channel 113 is open. At this time, the outlet channel is open, so the unacceptable water is discharged to the outside of the storage tank 10 through the outlet channel, preventing unacceptable water from entering the storage chamber of the storage tank 10. The use of acceptable deionized water ensures the availability of hydrogen feedstock for the hydrogen production system, improving the operational stability and efficiency of the hydrogen production system. The water quality detection element 21 transmits the detected data to the controller, which then controls the control valve group 22. The entire process requires no manual intervention, automating the water quality detection and inlet control of the hydrogen production system. This significantly improves the system's response speed and efficiency, reduces human error, and makes the deionized water replenishment process more stable and reliable. Furthermore, when unqualified deionized water is discharged through the drainage channel, the qualified deionized water entering the first channel 111 simultaneously cleans the water quality detection component. This prevents contamination of the water quality detection element 21 by the unqualified deionized water, which could reduce its detection accuracy, thus extending its lifespan and ensuring accurate water quality detection.

[0036] Furthermore, the water storage tank 10 includes a top cover 12 and a tank body 13. The top cover 12 is located on top of the tank body 13 and forms a water storage cavity with the tank body 13. Along the height direction of the tank body 13 (i.e., the direction from the bottom of the water storage tank 10 towards the top cover 12), a second channel 112 is located near the top cover 12 and communicates with the water storage cavity. A first channel 111 communicates with the second channel 112, and a third channel 113 communicates with the second channel 112. The connection between the second channel 112 and the tank body 13 is located near the top cover 12, which allows the deionized water in the inlet channel to enter the water storage cavity more effectively. After the third channel 113 communicates with the second channel 112, the outlet end of the third channel 113 moves along the height direction of the tank body 13 from the top cover 12 towards the bottom of the tank body 13. This allows for convenient discharge of the substandard deionized water when the water quality in the first channel 111 is detected to be substandard, improving operational convenience.

[0037] Preferably, the water quality detection element 21 includes a conductivity detection element, which is disposed in the first channel 111 to detect the conductivity of the water in the first channel 111. When the conductivity of the water in the first channel 111 is less than or equal to a preset conductivity, the first controller is in a first state, and when the conductivity of the water in the first channel 111 is greater than the preset conductivity, the first controller is in a second state.

[0038] In this embodiment, deionized water entering the storage tank 10 undergoes multi-layer filtration through filters and other devices to remove impurities and ions. Deionized water with a higher ion content has a higher conductivity than deionized water with a lower ion content. Therefore, by detecting the relationship between the conductivity of the deionized water and a preset conductivity, the water quality of the deionized water can be accurately determined, ensuring the quality of the deionized water entering the storage chamber of the storage tank 10 and thus guaranteeing the purity of the hydrogen produced. In this embodiment, the preset conductivity is set to be adjustable. When the hydrogen production system operates under different conditions and has different requirements for the quality of the deionized water, the value of the preset conductivity can be flexibly adjusted to adjust the water quality judgment standard. When the operating conditions of the hydrogen production system change or the requirement for higher hydrogen purity is increased, only the preset conductivity in the first controller needs to be modified to automatically screen deionized water according to the new standard. Through this flexible adjustment mechanism, this embodiment can better adapt to different application scenarios and changing needs.

[0039] Specifically, the control valve group 22 includes a first solenoid valve 221 and a second solenoid valve 222. The first solenoid valve 221 is disposed in the second channel 112 and electrically connected to the first controller. The second solenoid valve 222 is disposed in the third channel 113 and electrically connected to the first controller. When the first controller is in the first state, it is configured to control the first solenoid valve 221 to open and simultaneously control the second solenoid valve 222 to close. When the first controller is in the second state, it is configured to control the first solenoid valve 221 to close and simultaneously control the second solenoid valve 222 to open.

[0040] In this embodiment, when the deionized water in the first channel 111 is of acceptable quality (the conductivity of the deionized water is not greater than a predetermined conductivity), the first solenoid valve 221 opens and the second solenoid valve 222 closes to open the water inlet channel. When the deionized water in the first channel 111 is unacceptable quality (the conductivity of the deionized water is greater than a predetermined conductivity), the first solenoid valve 221 closes and the second solenoid valve 222 opens to open the drainage channel. The first solenoid valve 221 and the second solenoid valve 222 are easily controlled by the first controller, improving the automation level of the hydrogen production system and eliminating the need for manual control of the valves.

[0041] Furthermore, the water inlet control assembly 20 also includes a manual regulating valve 23, which is located in the second channel 112 and between the first solenoid valve 221 and the outlet end of the second channel 112. In the event of leaks in the water supply channel or drainage channel, closing the manual regulating valve 23 allows for quick detection of the leak and prevents contamination from sources in the second channel 112 that would otherwise contaminate the deionized water (which has passed the water quality detection element 21) into the water storage chamber of the storage tank 10, thus improving the safety of the hydrogen production system.

[0042] Furthermore, the liquid supply device also includes a heating control component 30, which includes a heating element 31, a liquid level detection element 32, and a second controller. The heating element 31 is at least partially disposed in the water storage chamber, and the liquid level detection element 32 is disposed in the water storage chamber and is used at least to detect the liquid level in the water storage chamber. The heating element 31 and the liquid level detection element 32 are electrically connected to the second controller, and the liquid level detection element 32 sends the detected liquid level to the second controller. The second controller controls the heating element based on the liquid level.

[0043] In this embodiment, the heating element 31 is partially disposed within the water storage chamber, which heats the deionized water in the chamber to the required temperature for hydrogen electrolysis. However, during the heating or hydrogen production process, the water level in the storage chamber will drop. When the water level drops to the point where the heating element 31 is exposed above the surface of the deionized water, there is a risk of the heating element 31 burning out. Therefore, by electrically connecting the liquid level detection element 32 to the second controller, the second controller controls the operation of the heating element based on the liquid level detected by the liquid level detection element 32. When the liquid level of the deionized water is lower than that of the heating element 31, the controller can stop heating the heating element 31 to prevent it from burning out and being damaged, thus improving the safety of the hydrogen production system.

[0044] Specifically, the water storage tank 10 is equipped with a liquid level detection channel 33, which includes a first pipe 331 and a second pipe 332. Along the height direction of the tank body 13, the first pipe 331 is located near the top cover 12, and the second pipe 332 is located near the bottom wall of the tank body 13. The liquid level detection component 32 includes a first pressure detection element, a second pressure detection element 321, and a calculation module. The first pressure detection element is located in the first pipe 331 to detect the pressure inside the first pipe 331, and the second pressure detection element 321 is located in the second pipe 332 to detect the pressure inside the second pipe 332. The calculation module is electrically connected to the first pressure detection element, the second pressure detection element 321, and the second controller. The calculation module calculates the liquid level height based on the signals transmitted by the first and second pressure detection elements 321 and transmits the liquid level height to the second controller.

[0045] In traditional hydrogen production systems, the liquid level is detected directly by installing a water level sensor inside the storage chamber. However, during electrolytic hydrogen production, an electrolyte is added to the storage chamber. This electrolyte is highly corrosive and can corrode the water level sensor, causing it to fail to accurately detect the water level. This results in the inability to control the operation of the heating element 31 and also poses a risk of dry burning. This embodiment addresses this by configuring the liquid level detection component 32 as a structure comprising a first pressure detection element, a second pressure detection element 321, and a calculation module. The first pressure detection element detects the pressure in a first pipe 331 located near the top cover 12 and connected to the storage chamber. The second pressure detection element 321 detects the pressure in a second pipe 332 located near the bottom wall of the tank 13 and connected to both the first pipe 331 and the storage chamber. The calculation module calculates the liquid level height based on the pressures detected by the two pressure detectors. This not only avoids the corrosion problem of the water level sensor inside the storage chamber but also prevents the heating element 31 from dry burning, thus improving the safety of the hydrogen production system.

[0046] Furthermore, the tank body 13 is provided with a pressure relief channel 40 connecting the water storage chamber and the outside of the water storage tank 10. The pressure relief channel 40 is provided with a pressure relief component 50, which is configured to relieve pressure in the water storage chamber when the air pressure in the water storage chamber is greater than the preset air pressure.

[0047] The pressure relief assembly 50 includes a pressure detection element, which is disposed in the pressure relief channel 40 and is used at least to detect the pressure in the water storage chamber. The pressure relief assembly 50 has a non-pressure relief state in which the pressure relief channel 40 is closed when the pressure in the water storage chamber is less than or equal to a predetermined pressure, and a pressure relief state in which the pressure relief channel 40 is opened when the pressure in the water storage chamber is greater than the predetermined pressure. When the pressure in the water storage chamber is greater than the predetermined pressure and there is a pressure difference with the outside of the water storage tank 10, the pressure relief assembly 50 deforms from the non-pressure relief state to the pressure relief state under the action of the pressure difference.

[0048] In this embodiment, the hydrogen production system generates some oxygen and other gases during electrolysis. These gases are stored in the water storage chamber of the water storage tank 10. That is, the water storage tank 10 not only stores deionized water but also stores gases such as oxygen. However, excessive gas storage in the water storage chamber can gradually increase the pressure. Excessive pressure can lead to deformation or explosion risks in the water storage tank 10. Therefore, a safe predetermined pressure is set, and a dedicated pressure relief channel 40 is provided on the water storage tank 10. A pressure detection device within the pressure relief channel 40 detects the pressure in the water storage chamber and transmits the data to a third controller. When the detected pressure exceeds the predetermined pressure, the third controller controls the pressure relief component 50 to release pressure, preventing excessive pressure in the water storage chamber, improving the safety of the hydrogen production system, and preventing the risk of deformation or explosion of the water storage tank 10.

[0049] Specifically, the pressure relief channel 40 includes a third pipe 41 and a fourth pipe 42. The pressure relief assembly 50 includes an installation component 51, a rupture element 52, and a third controller. An installation channel 511 is provided through the installation component 51. The third pipe 41 and the fourth pipe 42 are respectively connected to opposite sides of the installation component 51 and communicate with the installation channel 511. The end of the third pipe 41 away from the installation component 51 is connected to the water storage tank 10, and the end of the fourth pipe 42 away from the installation component 51 is connected to the outside of the water storage tank 10. The rupture element 52 is at least partially disposed in the installation channel 511 and seals the installation channel 511 to isolate the third pipe 41 and the fourth pipe 42 from each other. The rupture element 52 ruptures under the action of pressure difference to deform the pressure relief assembly 50 from a non-pressure relief state to a pressure relief state. The third controller is electrically connected to the air pressure detection component and the rupture element 52 respectively. The air pressure detection component transmits the detected air pressure to the third controller.

[0050] In this embodiment, when the pressure detector detects that the pressure inside the water storage chamber is greater than the predetermined pressure, it sends feedback to the third controller. The rupture element 52 ruptures under the pressure difference between the water storage chamber and the predetermined pressure, as well as under the action of the third controller. This connects the third pipe 41, which was isolated by the rupture element 52, with the fourth pipe 42, thus opening the installation channel 511. At this time, the pressure relief component 50 deforms from a non-pressure relief state to a pressure relief state. The gas inside the water storage chamber enters the outside of the water storage tank 10 through the pressure relief channel 40, gradually bringing the pressure inside the water storage chamber closer to the predetermined pressure or atmospheric pressure. This avoids the risk of excessive pressure inside the water storage chamber, which could lead to deformation or even explosion of the water storage tank 10, effectively protecting the hydrogen production system from high-pressure damage and improving the safety of the hydrogen production system.

[0051] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0052] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0053] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A liquid supply device for a hydrogen production system, characterized in that, include: A water storage tank (10) is provided with a water storage cavity inside the water storage tank (10). A water control channel (11) is provided on the water storage tank (10). The water control channel (11) includes a first channel (111), a second channel (112) and a third channel (113). The first channel (111), the second channel (112) and the third channel (113) have an inlet end and an outlet end respectively arranged opposite to each other. The inlet end of the first channel (111) is connected to an external water supply device. The outlet end of the first channel (111) is connected to the inlet end of the second channel (112) and the inlet end of the third channel (113) respectively. The outlet end of the second channel (112) is connected to the water storage cavity. The outlet end of the third channel (113) is connected to the outside of the water storage tank (10). The water inlet control assembly (20) includes a water quality detection element (21), a control valve assembly (22), and a first controller. The water quality detection element (21) is disposed in the first channel (111), and the control valve assembly (22) is disposed in the second channel (112) and the third channel (113). The first controller is electrically connected to the water quality detection element (21) to determine whether the water quality in the first channel (111) is qualified based on the feedback signal of the water quality detection element (21). The first controller is electrically connected to the control valve assembly (22). The first controller has a first state where, when the water quality in the first channel (111) is qualified, it controls the control valve assembly (22) to open the second channel (112) and close the third channel (113), and a second state where, when the water quality in the first channel (111) is unqualified, it controls the control valve assembly (22) to close the second channel (112) and open the third channel (113).

2. The liquid supply device for a hydrogen production system according to claim 1, characterized in that, The water storage tank (10) includes a top cover (12) and a tank body (13). The top cover (12) is disposed on the top of the tank body (13) and surrounds the tank body (13) to form the water storage cavity. Along the height direction of the tank body (13), the second channel (112) is disposed close to the top cover (12) and communicates with the water storage cavity. The first channel (111) communicates with the second channel (112), and the third channel (113) communicates with the second channel (112).

3. The liquid supply device for a hydrogen production system according to claim 2, characterized in that, The water quality detection element (21) includes a conductivity detection element, which is disposed in the first channel (111) to detect the conductivity of the water in the first channel (111). When the conductivity of the water in the first channel (111) is less than or equal to a preset conductivity, the first controller is in the first state. When the conductivity of the water in the first channel (111) is greater than the preset conductivity, the first controller is in the second state.

4. The liquid supply device for a hydrogen production system according to claim 2, characterized in that, The control valve group (22) includes a first solenoid valve (221) and a second solenoid valve (222). The first solenoid valve (221) is disposed in the second channel (112) and electrically connected to the first controller. The second solenoid valve (222) is disposed in the third channel (113) and electrically connected to the first controller. When the first controller is in the first state, it is configured to control the first solenoid valve (221) to open and simultaneously control the second solenoid valve (222) to close. When the first controller is in the second state, it is configured to control the first solenoid valve (221) to close and simultaneously control the second solenoid valve (222) to open.

5. The liquid supply device for a hydrogen production system according to claim 4, characterized in that, The water inlet control assembly (20) also includes a manual regulating valve (23), which is disposed in the second channel (112) and located between the first solenoid valve (221) and the outlet end of the second channel (112).

6. The liquid supply device for a hydrogen production system according to claim 2, characterized in that, The liquid supply device further includes a heating control component (30), which includes a heating element (31), a liquid level detection element (32), and a second controller. The heating element (31) is at least partially disposed in the water storage chamber, and the liquid level detection element (32) is disposed in the water storage chamber and is used at least to detect the liquid level in the water storage chamber. The heating element (31) and the liquid level detection element (32) are electrically connected to the second controller. The liquid level detection element (32) sends the detected liquid level to the second controller, and the second controller controls the heating element (31) based on the liquid level.

7. The liquid supply device for a hydrogen production system according to claim 6, characterized in that, The water storage tank (10) is provided with a liquid level detection channel (33), which includes a first pipe (331) and a second pipe (332). Along the height direction of the tank body (13), the first pipe (331) is located near the top cover (12), and the second pipe (332) is located near the bottom wall of the tank body (13). The liquid level detection component (32) includes: A first pressure detection element is disposed in the first pipe (331) to detect the pressure inside the first pipe (331); A second pressure detection element (321) is disposed in the second pipe (332) for detecting the pressure inside the second pipe (332); The calculation module is electrically connected to the first pressure detection element, the second pressure detection element (321) and the second controller respectively. The calculation module calculates the liquid level height based on the signals transmitted by the first pressure detection element and the second pressure detection element (321) and transmits the liquid level height to the second controller.

8. The liquid supply device for a hydrogen production system according to any one of claims 2 to 7, characterized in that, The tank body (13) is provided with a pressure relief channel (40) connecting the water storage cavity to the outside of the water storage tank (10). The pressure relief channel (40) is provided with a pressure relief component (50). The pressure relief component (50) is configured to relieve pressure in the water storage cavity when the air pressure in the water storage cavity is greater than the preset air pressure.

9. The liquid supply device for a hydrogen production system according to claim 8, characterized in that, The pressure relief assembly (50) includes a pressure detection element, which is disposed in the pressure relief channel (40) and is used at least to detect the pressure in the water storage chamber. The pressure relief assembly (50) has a non-pressure relief state in which the pressure relief channel (40) is closed when the pressure in the water storage chamber is less than or equal to a predetermined pressure, and a pressure relief state in which the pressure relief channel (40) is opened when the pressure in the water storage chamber is greater than the predetermined pressure. When the pressure in the water storage chamber is greater than the predetermined pressure and there is a pressure difference with the outside of the water storage tank (10), the pressure relief assembly (50) deforms from the non-pressure relief state to the pressure relief state under the action of the pressure difference.

10. The liquid supply device for a hydrogen production system according to claim 9, characterized in that, The pressure relief channel (40) includes a third pipe (41) and a fourth pipe (42). The pressure relief assembly (50) includes a mounting component (51), a bursting component (52), and a third controller. An installation channel (511) is provided through the mounting component (51). The third pipe (41) and the fourth pipe (42) are respectively connected to opposite sides of the mounting component (51) and communicate with the installation channel (511). The end of the third pipe (41) away from the mounting component (51) is... The fourth pipe (42) is connected to the water storage tank (10) at one end away from the mounting component (51) and is connected to the outside of the water storage tank (10); the rupture element (52) is at least partially disposed in the mounting channel (511) and seals the mounting channel (511) so that the third pipe (41) and the fourth pipe (42) are isolated from each other; the rupture element (52) ruptures under the action of pressure difference so that the pressure relief component (50) deforms from the non-pressure relief state to the pressure relief state; The third controller is electrically connected to the air pressure detection device and the rupture device (52) respectively, and the air pressure detection device transmits the detected air pressure to the third controller.

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