Hydrogen production device

Abstract

The utility model discloses a hydrogen production device, and relates to the technical field of hydrogen production, the hydrogen production device comprises an electrolytic cell, a gas-liquid separator, a gas-water separator, a liquid discharge pipe, a liquid discharge valve and a liquid supplement assembly, the electrolytic cell is provided with an inlet end and an outlet end; the gas-liquid separator is communicated with the outlet end, and the gas-liquid separator is provided with a gas outlet and a liquid inlet; the gas-water separator is communicated with the gas outlet and is provided with a liquid outlet; the liquid discharge pipe is connected with the liquid inlet; one end of the drain valve is communicated with the drain pipe, and the other end is communicated with the drain port; the liquid supplementing assembly communicates with the end, away from the gas outlet, of the liquid discharging pipe. According to the technical scheme provided by the invention, the liquid discharging smoothness of the gas-water separator can be improved.

Description

Technical Field

[0001] This application relates to the technical field of hydrogen production, and particularly to a hydrogen production device. Background Art

[0002] In the electrolytic water hydrogen production process, the liquid phase separated by the gas-liquid separator needs to be discharged into the separator by opening the drain switch valve. However, the traditional discharge scheme requires a relatively large height difference, and the presence of gas phase in the drain pipe easily leads to the problem of unsmooth liquid discharge. Utility Model Content

[0003] The main purpose of this application is to propose a hydrogen production device, aiming to improve the smoothness of liquid discharge of the gas-liquid separator.

[0004] To achieve the above object, the hydrogen production device proposed in this application includes an electrolytic cell, a gas-liquid separator, a gas-liquid separator, a drain pipe, a drain valve, and a liquid replenishment component. The electrolytic cell has an inlet end and an outlet end; the gas-liquid separator has a gas outlet, a first liquid inlet, and a gas-liquid mixture inlet, and the gas-liquid mixture inlet is connected to the outlet end; the gas-liquid separator has an air inlet and a drain outlet, and the air inlet is connected to the gas outlet; the drain pipe is connected to the liquid inlet; one end of the drain valve is connected to the drain pipe, and the other end is connected to the drain outlet; the liquid replenishment component has a water outlet, and the water outlet is connected to the drain pipe.

[0005] In one embodiment, a first switch valve is provided on the liquid replenishment component.

[0006] In one embodiment, the liquid replenishment component includes:

[0007] A liquid replenishment pipe, the liquid replenishment pipe is connected to the end of the drain pipe away from the gas outlet; and the liquid replenishment pipe is independently arranged from the pipeline between the gas-liquid separator and the gas-liquid separator; and

[0008] A liquid replenishment source, the liquid replenishment source is connected to the end of the liquid replenishment pipe away from the drain pipe.

[0009] In one embodiment, the hydrogen production device further includes a scrubber, and the scrubber is arranged on the pipeline between the gas outlet and the air inlet; the scrubber further has a liquid replenishment port, and the hydrogen production device includes a liquid replenishment source, and the liquid replenishment port is connected to the liquid replenishment source.

[0010] In one embodiment, the liquid replenishment component includes a liquid replenishment pipe, and the liquid replenishment pipe has the water outlet; the scrubber has an overflow port, and the overflow port is connected to the end of the liquid replenishment pipe away from the drain pipe.

[0011] In one embodiment, a second switch valve is further connected between the liquid replenishment source and the liquid replenishment port.

[0012] In one embodiment, the scrubber has an overflow port, the gas-liquid separator further includes a second liquid inlet, and the hydrogen production device further includes an overflow pipe. Two ends of the overflow pipe are respectively communicated with the overflow port and the second liquid inlet.

[0013] In one embodiment, the hydrogen production device further includes a first heat exchanger, and the first heat exchanger is connected between the gas outlet and the air inlet.

[0014] In one embodiment, the hydrogen production device further includes a reflux pipeline. The gas-liquid separator has an electrolyte outlet, the electrolyte outlet is communicated with one end of the reflux pipeline, and the inlet end is communicated with the other end of the reflux pipeline.

[0015] In one embodiment, a second heat exchanger and a circulation pump are arranged on the reflux pipeline, and the second heat exchanger and the circulation pump are connected in series.

[0016] The technical solution of the present application is such that the gas-liquid mixture inlet of the gas-liquid separator is communicated with the outlet end of the electrolytic cell, so that the mixture of gas and electrolyte discharged from the outlet end of the electrolytic cell enters the gas-liquid separator for gas-liquid separation, thereby reducing the amount of electrolyte contained in the gas discharged from the gas outlet of the gas-liquid separator. By connecting the gas-water separator to the gas outlet, the gas discharged from the gas outlet of the gas-liquid separator can enter the gas-water separator for further gas-water separation, thereby achieving the drying effect of the gas. By providing a liquid discharge port on the gas-water separator, a liquid discharge pipe is connected to the liquid inlet of the gas-liquid separator, one end of the liquid discharge valve is communicated with the liquid discharge pipe, and the other end is communicated with the liquid discharge port, so that the liquid inside the gas-water separator can sequentially pass through the liquid discharge port, the liquid discharge valve and the liquid discharge pipe and enter the gas-liquid separator, reducing the waste of electrolyte. By providing a liquid replenishing assembly, and the water outlet of the liquid replenishing assembly is connected to the liquid discharge pipe, the liquid replenishing assembly can replenish pure water into the liquid discharge pipe in advance, thereby exhausting the gas in the liquid discharge pipe, making the pure water in the liquid discharge pipe flow, and then opening the liquid discharge valve. At this time, the liquid discharge pipe forms a siphon effect on the gas-water separator, and can quickly suck the liquid in the gas-water separator into the liquid discharge pipe and then flow into the gas-liquid separator, improving the liquid discharge fluency of the gas-water separator. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the structures shown in these drawings.

[0018] Figure 1Schematic structural diagram of an embodiment of the hydrogen production device provided by the present application;

[0019] Figure 2 is Figure 1 partial enlarged view at position A in

[0020] Figure 3 Schematic structural diagram of another embodiment of the hydrogen production device provided by the present application.

[0021] Explanation of the reference numerals in the attached drawings:

[0022] 100, electrolytic cell; 110, inlet end; 120, outlet end;

[0023] 200, gas-liquid separator; 201, gas outlet; 202, first liquid inlet; 203, electrolyte outlet; 204, second liquid inlet; 205, gas-liquid mixture inlet;

[0024] 300, gas-water separator; 301, gas inlet; 302, liquid discharge port;

[0025] 400, liquid replenishing assembly; 410, liquid replenishing pipe; 411, water outlet; 420, liquid replenishing source;

[0026] 500, scrubber; 501, liquid replenishing port; 502, overflow port;

[0027] 600, first heat exchanger;

[0028] 700, second heat exchanger;

[0029] 800, circulation pump;

[0030] 10, liquid discharge pipe; 20, overflow pipe; 30, return pipeline; 40, liquid discharge valve; 50, first switching valve; 60, second switching valve.

[0031] The realization of the purpose, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0033] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present application, then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present application, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0035] In the electrolytic water hydrogen production process, the liquid phase separated by the gas-liquid separator needs to be discharged into the separator by opening the drain switch valve. However, the traditional discharge scheme requires a relatively large height difference, and the presence of gas phase in the drain pipe easily leads to the problem of unsmooth liquid discharge.

[0036] In order to improve the smoothness of liquid discharge, the present application proposes a hydrogen production device.

[0037] Please refer to Figures 1 to 3 , in an embodiment of the present application, the hydrogen production device includes an electrolytic cell 100, a gas-liquid separator 200, a gas-water separator 300, a drain pipe 10, a drain valve 40, and a liquid replenishment component 400. The electrolytic cell 100 has an inlet end 110 and an outlet end 120; the gas-liquid separator 200 has a gas outlet 201, a first liquid inlet 202, and a gas-liquid mixture inlet 205, and the gas-liquid mixture inlet 205 is connected to the outlet end 120; the gas-water separator 300 has an air inlet 301 and a drain outlet 302, and the air inlet 301 is connected to the gas outlet 201; the drain pipe 10 is connected to the liquid inlet 202; one end of the drain valve 40 is connected to the drain pipe 10, and the other end is connected to the drain outlet 302; the liquid replenishment component 400 has a water outlet 411, and the water outlet 411 is connected to the drain pipe 10.

[0038] An electrolytic cell 100 is provided with an electrolytic solution, and hydrogen and oxygen are generated under the action of electrolysis. Among them, the electrolytic solution can be water or an alkaline electrolytic solution. Among the gases generated in the electrolytic cell 100, part of the electrolytic solution is mixed. By providing a gas-liquid separator 200, the gas-liquid separator 200 can separate at least part of the electrolytic solution from the gas, thereby reducing the risk of electrolytic solution discharge and at the same time improving the purity of hydrogen. It can be understood that the gas discharged from the gas outlet 201 of the gas-liquid separator 200 may also contain a small amount of water. By connecting the gas inlet 301 of the gas-water separator 300 to the gas outlet 201, the gas discharged from the gas-liquid separator 200 can pass through the gas-water separator 300 to separate the moisture in the gas, thereby obtaining crude hydrogen. It should be noted that when the gas inlet 301 of the gas-water separator 300 is connected to the gas outlet 201, it can be directly connected or indirectly connected, as long as the gas discharged from the gas-liquid separator 200 can enter the gas-water separator 300.

[0039] It can be understood that the gas-water separator 300 can separate the gas and the moisture contained in the gas. By connecting the drain pipe 10 to the first liquid inlet 202 of the gas-liquid separator 200; one end of the drain valve 40 is connected to the drain pipe 10, and the other end is connected to the drain port 302, the moisture in the gas-water separator 300 can enter the gas-liquid separator 200 through the drain port 302, the drain valve and the liquid inlet 202 in sequence. Further, the gas-liquid separator 200 also has a liquid outlet, and the liquid outlet can be connected to the reflux port of the electrolytic cell 100, so that the separated liquid can flow back into the electrolytic cell 100 to supplement the raw materials in the electrolytic cell 100. By connecting the water outlet of the liquid supplementing assembly 400 to the drain pipe 10, when the drain valve 40 is closed, pure water can be introduced into the drain pipe 10 through the liquid supplementing assembly 400, thereby enabling the pure water to occupy the space in the drain pipe 10 in advance, discharging the gas in the drain pipe 10, and at the same time making the fluid in the drain pipe 10 flow. When the drain valve 40 is opened after flowing for a period of time, the drain pipe 10 forms a siphon effect on the gas-water separator 300, so that the liquid at the bottom of the gas-water separator 300 quickly enters the drain pipe 10 through the drain valve 40 and is discharged into the gas-liquid separator 200. Therefore, the problem of poor liquid discharge caused by the presence of gas in the drain pipe 10 can be improved, and the liquid at the bottom of the gas-water separator 300 is discharged more quickly due to the siphon effect formed by the drain pipe 10.

[0040] In the technical solution of the present application, the gas-liquid mixture inlet 205 of the gas-liquid separator 200 is connected to the outlet end 120 of the electrolytic cell 100. Then, the mixture of gas and electrolyte discharged from the outlet end 120 of the electrolytic cell 100 enters the gas-liquid separator 200 for gas-liquid separation, so that the gas discharged from the gas outlet 201 of the gas-liquid separator 200 contains less electrolyte. By connecting the air inlet 301 of the air-water separator 300 to the gas outlet 201 of the gas-liquid separator 200, the gas discharged from the gas outlet 201 of the gas-liquid separator 200 can enter the air-water separator 300 for further air-water separation, thereby achieving the drying effect of the gas. By providing a drain port 302 on the air-water separator 300, a drain pipe 10 is connected to the first liquid inlet 202 of the gas-liquid separator 200, and one end of a drain valve 40 is connected to the drain pipe 10 and the other end is connected to the drain port 302. Then, the liquid inside the air-water separator 300 can sequentially pass through the drain port 302, the drain valve 40 and the drain pipe 10 and enter the gas-liquid separator 200, reducing the waste of electrolyte. By providing a liquid supplement assembly 400, and the water outlet 411 of the liquid supplement assembly 400 is connected to the drain pipe 10, the liquid supplement assembly 400 can supplement pure water into the drain pipe 10 in advance, thereby exhausting the gas in the drain pipe 10, making the pure water in the drain pipe 10 flow. Then, when the drain valve 40 is opened again, at this time, the drain pipe 10 forms a siphon effect on the air-water separator 300, and the liquid in the air-water separator 300 can be quickly sucked into the drain pipe 10 and then flow into the gas-liquid separator 200, improving the drainage fluency of the air-water separator 300.

[0041] In an embodiment of the present application, as Figure 1 shown, a first switch valve 50 is provided on the liquid supplement assembly 400.

[0042] By providing the first switch valve 50 on the liquid supplement assembly 400, it is possible to control whether the liquid supplement assembly 400 supplements pure water into the drain pipe 10. For example, when the first switch valve 50 on the liquid supplement assembly 400 is opened for a period of time and the drain pipe 10 is filled with pure water, and then the drain valve 40 is opened so that the liquid in the air-water separator 300 is normally discharged into the gas-liquid separator 200, the first switch valve 50 on the liquid supplement assembly 400 can be closed to reduce its influence on the liquid discharge in the air-water separator 300.

[0043] As Figure 1 shown, in an embodiment of the present application, the liquid supplement assembly 400 includes a liquid supplement pipe 410 and a liquid supplement source 420. The liquid supplement pipe 410 is connected to one end of the drain pipe 10 away from the gas outlet 201; and the liquid supplement pipe 410 is independently arranged from the pipeline between the gas-liquid separator 200 and the air-water separator 300; the liquid supplement source 420 is connected to one end of the liquid supplement pipe 410 away from the drain pipe 10.

[0044] With such a setting, the liquid replenishment source 420 can directly replenish pure water into the drain pipe 10 through the liquid replenishment pipe 410, thereby improving the efficiency of replenishing pure water into the drain pipe 10.

[0045] Please refer to Figure 1 and Figure 2 In another embodiment of the present application, the hydrogen production device further includes a scrubber 500, and the scrubber 500 is provided on the pipeline between the gas outlet 201 and the air inlet 301; the scrubber 500 further has a liquid replenishment port 501, and the hydrogen production device includes a liquid replenishment source 420, and the liquid replenishment port 501 is communicated with the liquid replenishment source 420.

[0046] By providing the scrubber 500, when the electrolyte is an alkaline solution and the scrubber 500 is provided between the gas outlet 201 of the gas-liquid separator 200 and the air inlet 301 of the gas-water separator 300, the gas discharged from the gas-liquid separator 200 enters the scrubber 500 for washing, so as to wash away the alkali in the alkaline solution, so that only water remains in the gas discharged from the scrubber 500, which is beneficial to realizing the purification effect of hydrogen.

[0047] It can be understood that when washing the gas, a washing liquid needs to be provided in the scrubber 500, and the washing liquid is continuously consumed during the washing process. By providing a liquid replenishment port 501 on the scrubber 500 and communicating the liquid replenishment port 501 with the liquid replenishment source 420, the liquid replenishment source 420 can replenish liquid into the scrubber 500 through the liquid replenishment port 501, which is beneficial to the continuous normal operation of the scrubber 500.

[0048] Please refer to Figure 3 As shown, in another example, the liquid replenishment assembly 400 includes a liquid replenishment pipe 410, and the liquid replenishment pipe 410 has a water outlet 411; the scrubber 500 has an overflow port 502, and the overflow port 502 communicates with one end of the liquid replenishment pipe 410 away from the drain pipe 10.

[0049] By making the liquid replenishment pipe 410 have a water outlet 411 and one end of the liquid replenishment pipe 410 away from the drain pipe 10 communicate with the overflow port 502 of the scrubber 500, pure water can be replenished into the liquid replenishment pipe 410 through the scrubber 500, and then the effect of introducing pure water into the drain pipe 10 can be achieved. Such a setting can reduce the number of pipelines in the hydrogen production device, thereby simplifying the structure of the hydrogen production device and reducing the cost of the hydrogen production device.

[0050] Please refer to Figure 1 and Figure 2 Or please refer to Figure 3 As shown, further, a second on-off valve 60 is also communicated between the liquid replenishment source 420 and the liquid replenishment port 501.

[0051] By connecting the second on-off valve 60 between the refill source 420 and the refill port 501, the second on-off valve 60 can be used to control whether the refill source 420 replenishes pure water into the scrubber 500. When the liquid level in the gas-liquid separator 200 is low, the second on-off valve 60 can be opened, allowing the refill source 420 to replenish pure water into the scrubber 500 through the refill port 501. When the liquid level in the gas-liquid separator 200 is high, the second on-off valve 60 can be closed, eliminating the need for the refill source 420 to replenish pure water into the scrubber 500.

[0052] Further, please refer to Figure 1 and Figure 2 In one example, the scrubber 500 has an overflow port 502 , the gas-liquid separator 200 further includes a second liquid inlet 204 , and the hydrogen production device further includes an overflow pipe 20 , the two ends of the overflow pipe 20 are connected to the overflow port 502 and the second liquid inlet 204 , respectively.

[0053] This arrangement can control the liquid level in the scrubber 500 and prevent excessive liquid in the scrubber 500. By connecting the overflow port 502 to the second liquid inlet 204 via the overflow pipe 20, the liquid in the scrubber 500 can flow into the gas-liquid separator 200. When the liquid outlet of the gas-liquid separator 200 is connected to the return end of the electrolytic cell 100, the electrolyte can flow back into the electrolytic cell 100.

[0054] Please refer to Figure 1 and Figure 2 Or please refer to Figure 3 As shown, in an embodiment of the present application, the hydrogen production device further includes a first heat exchanger 600 , which is connected between the gas outlet 201 and the gas inlet 301 .

[0055] It is understood that the electrolyte in the electrolytic cell 100 releases a large amount of heat during the electrolysis process, so the temperature of the gas discharged from the gas outlet 201 of the gas-liquid separator 200 is also relatively high. By connecting the first heat exchanger 600 between the gas outlet 201 of the gas-liquid separator 200 and the gas inlet 301 of the gas-water separator 300, the gas and liquid mixed in the gas can be cooled and condensed before entering the gas-water separator 300, thereby facilitating the separation of gas and liquid within the gas-water separator 300.

[0056] Specifically, when the hydrogen production device includes both the first heat exchanger 600 and the scrubber 500 , the first heat exchanger 600 may be disposed between the scrubber 500 and the gas-water separator 300 , or between the scrubber 500 and the gas-liquid separator 200 .

[0057] like Figure 1 or Figure 3As shown, in the embodiment of the present application, the hydrogen production device further includes a reflux pipeline 30. The gas-liquid separator 200 has an electrolyte outlet 203. The electrolyte outlet 203 communicates with one end of the reflux pipeline 30, and the inlet end 110 communicates with the other end of the reflux pipeline 30.

[0058] By providing a reflux pipeline 30 between the electrolyte outlet 203 of the gas-liquid separator 200 and the inlet end 110 of the electrolytic cell 100, the electrolyte in the gas-liquid separator 200 can be recycled into the electrolytic cell 100.

[0059] Further, as Figure 1 or Figure 3 shown, a second heat exchanger 700 and a circulation pump 800 are provided on the reflux pipeline 30, and the second heat exchanger 700 and the circulation pump 800 are connected in series.

[0060] It can be understood that since the electrolyte in the electrolytic cell 100 will release a large amount of heat under the action of electrolysis, the temperature of the electrolyte entering the gas-liquid separator 200 and the electrolyte flowing out from the electrolyte outlet 203 of the gas-liquid separator 200 is relatively high. By providing a second heat exchanger 700 on the reflux pipeline 30, the effect of cooling the electrolyte flowing out from the electrolyte outlet 203 can be achieved, so that the temperature of the electrolyte is more appropriate when it returns to the electrolytic cell 100 again.

[0061] By further providing a circulation pump 800 on the reflux pipeline 30, and the circulation pump 800 is connected in series with the second heat exchanger 700, the circulation pump 800 can provide power for the electrolyte on the reflux pipeline 30 to flow into the electrolytic cell 100.

[0062] As Figure 1 or Figure 3 shown, in the embodiment of the present application, the outlet end 120 includes an anode outlet and a cathode outlet. There are at least two gas-liquid separators 200, and the at least two gas-liquid separators 200 are respectively communicated with the anode outlet and the cathode outlet.

[0063] After the electrolyte is electrolyzed to produce hydrogen and oxygen, in order to reduce the risk of safety hazards caused by the mixing of hydrogen and oxygen, the outlet end 120 of the electrolytic cell 100 is provided with an anode outlet and a cathode outlet. Hydrogen is discharged from the cathode outlet, and oxygen is discharged from the anode outlet. There are at least two gas-liquid separators 200, and the at least two gas-liquid separators 200 are respectively communicated with the anode outlet and the cathode outlet, so that the at least two gas-liquid separators 200 can respectively perform gas-liquid separation on the hydrogen with electrolyte and perform gas-liquid separation on the oxygen with electrolyte.

[0064] The above are only exemplary embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural transformation made under the technical concept of the present application by using the content of the specification and drawings of the present application, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A hydrogen production device, characterized in that, Comprising: An electrolytic cell having an inlet end and an outlet end; A gas-liquid separator having a gas outlet, a first liquid inlet, and a gas-liquid mixture inlet, the gas-liquid mixture inlet being connected to the outlet end; A gas-water separator having an air inlet and a liquid discharge port, the air inlet being connected to the gas outlet; A liquid discharge pipe connecting the liquid inlet; A liquid discharge valve, one end of the liquid discharge valve being connected to the liquid discharge pipe and the other end being connected to the liquid discharge port; And A liquid replenishment assembly having a water outlet connected to the liquid discharge pipe.

2. The hydrogen production device according to claim 1, characterized in that, A first switching valve is provided on the liquid replenishment assembly.

3. The hydrogen production device according to claim 1, characterized in that, The liquid replenishment assembly includes: A liquid replenishment pipe communicating with one end of the liquid discharge pipe remote from the gas outlet; and the liquid replenishment pipe is independently arranged from the pipeline between the gas-liquid separator and the gas-water separator; and A liquid replenishment source communicating with one end of the liquid replenishment pipe remote from the liquid discharge pipe.

4. The hydrogen production device according to claim 1, characterized in that, The hydrogen production device further includes a scrubber provided on the pipeline between the gas outlet and the air inlet; the scrubber further has a liquid replenishment port, and the hydrogen production device includes a liquid replenishment source, and the liquid replenishment port is communicated with the liquid replenishment source.

5. The hydrogen production device according to claim 4, characterized in that, The liquid replenishment assembly includes a liquid replenishment pipe having the water outlet; the scrubber has an overflow port, and the overflow port is communicated with one end of the liquid replenishment pipe remote from the liquid discharge pipe.

6. The hydrogen production device according to claim 4, characterized in that, A second switching valve is further connected between the liquid replenishment source and the liquid replenishment port.

7. The hydrogen production device according to claim 4, characterized in that, The scrubber has an overflow port, the gas-liquid separator further includes a second liquid inlet, and the hydrogen production device further includes an overflow pipe, and both ends of the overflow pipe are respectively communicated with the overflow port and the second liquid inlet.

8. The hydrogen production device according to claim 1, characterized in that, The hydrogen production device further includes a first heat exchanger connected between the gas outlet and the air inlet.

9. The hydrogen production device according to any one of claims 1 to 8, characterized in that, The hydrogen production device further includes a return pipeline, the gas-liquid separator has an electrolyte outlet, the electrolyte outlet is communicated with one end of the return pipeline, and the inlet end is communicated with the other end of the return pipeline.

10. The hydrogen production device according to claim 9, characterized in that, A second heat exchanger and a circulation pump are provided on the return pipeline, and the second heat exchanger and the circulation pump are connected in series.

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