A hydrogen production device

Abstract

The present invention discloses a hydrogen production device, comprising: an electrolysis structure and a clamping mechanism, the clamping mechanism comprising a positive electrode pressure plate, a negative electrode pressure plate, a positive plate, a negative plate, and an adjustment assembly, the positive electrode pressure plate and the negative electrode pressure plate facing each other, the positive plate and the negative plate being padded on opposite sides of the positive electrode pressure plate and the negative plate, respectively; the electrolysis structure being sandwiched between the positive plate and the negative plate, the adjustment assembly being connected between the positive plate and the negative plate, the positive plate being provided with a water inlet interface, a water return interface, and a hydrogen outlet interface on the side of the positive plate facing away from the negative plate; the electrolysis structure comprising an electrolysis unit and an external sealing assembly, the external sealing assembly comprising a support ring and an elastic sealing ring, the support ring being sleeved around the outside of the electrolysis unit, the elastic sealing ring being sleeved around the outer periphery of the electrolysis unit, the thickness of the elastic sealing ring being greater than both the thickness of the support ring and the thickness of the electrolysis unit. The present invention can ensure excellent sealing performance.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production, and in particular to a hydrogen production device. Background Art

[0002] PEM (Proton Exchange Membrane) water electrolysis hydrogen production devices use a proton exchange membrane as the core material of the electrolyzer to decompose water, thereby producing hydrogen. PEM water electrolyzer hydrogen production devices offer advantages such as high efficiency and fast reaction speed, which improves hydrogen production efficiency.

[0003] However, since the hydrogen production device produces high-pressure hydrogen, and hydrogen has an extremely low molecular weight and is easy to diffuse, if the sealing design of the hydrogen production device is not strict, hydrogen can easily leak into the external environment. Summary of the Invention

[0004] The purpose of the present invention is to provide a hydrogen production device to ensure better sealing performance.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A hydrogen production device comprises: an electrolysis structure and a clamping mechanism, wherein the clamping mechanism is used to clamp the electrolysis structure;

[0007] The clamping mechanism includes a positive pressure plate, a negative pressure plate, a positive plate, a negative plate and an adjustment component, the positive pressure plate and the negative pressure plate are opposite to each other, the positive plate and the negative plate are correspondingly padded on both sides of the positive pressure plate and the negative pressure plate opposite to each other, the electrolysis structure is clamped between the positive plate and the negative plate, the adjustment component is connected between the positive pressure plate and the negative pressure plate to adjust the distance between the positive pressure plate and the negative pressure plate, and the positive pressure plate is provided with a water inlet interface, a water return interface and a hydrogen outlet interface on the side facing away from the negative pressure plate;

[0008] The electrolysis structure includes an electrolysis unit and an outer sealing assembly, the outer sealing assembly includes a support ring and an elastic sealing ring, the support ring is sleeved on the outside of the electrolysis unit, a sealed space is formed between the support ring, the electrolysis unit, the positive plate and the negative plate, the elastic sealing ring is arranged in the sealed space and sleeved on the outer periphery of the electrolysis unit, the thickness of the elastic sealing ring in the direction from the positive plate to the negative plate is greater than the thickness of the support ring in the direction from the positive plate to the negative plate, and is also greater than the thickness of the electrolysis unit in the direction from the positive plate to the negative plate, the cross-section of the elastic sealing ring is rectangular, and the water inlet interface, return water interface and hydrogen outlet interface of the positive pressure plate are all connected to the electrolysis unit.

[0009] In some embodiments, the electrolytic structure is provided in plurality, and the plurality of electrolytic structures are stacked in sequence, with a titanium plate provided between two adjacent electrolytic structures; and, in the electrolytic structure adjacent to the positive electrode plate, the support ring, the electrolytic unit, the positive electrode plate, and the titanium plate cooperate to form the sealed space;

[0010] In the electrolysis structure adjacent to the negative electrode plate, the support ring and the electrolysis unit form the sealed space with the negative electrode plate and the titanium plate;

[0011] In other electrolysis structures, the support ring, the electrolysis unit, and the two adjacent titanium plates form the sealed space.

[0012] In some embodiments, a positioning ring is further included, which is arranged on the side of the electrolysis structure close to the positive electrode pressure plate. A positioning groove is circumferentially opened on the side of the positioning ring close to the electrolysis structure, and part of the elastic sealing ring enters the positioning groove.

[0013] In some embodiments, the outer sealing assembly further includes a supporting sealing gasket, the supporting ring is a stainless steel supporting ring, and the supporting sealing gaskets are attached to both sides of the supporting ring.

[0014] In some embodiments, the electrolysis unit includes a membrane electrode, a titanium junction, a first drainage ring and a second drainage ring, the first drainage ring, the membrane electrode and the second drainage ring are stacked together in sequence, the membrane electrode is circular, the outer diameter of the first drainage ring and the outer diameter of the second drainage ring are both larger than the outer diameter of the membrane electrode, the first drainage ring and the second drainage ring clamp the outer periphery of the membrane electrode, the first drainage ring is provided with a hydrogen outlet channel connected to one side of the membrane electrode, the second drainage ring is provided with a water inlet channel and a return water channel both connected to the other side of the membrane electrode, there are two titanium junctions, and the two titanium junctions are correspondingly connected to the two sides of the membrane electrode, the water inlet interface, return water interface and hydrogen outlet interface of the positive electrode pressure plate are correspondingly connected to the water inlet channel, return water channel and hydrogen outlet channel of the electrolysis unit.

[0015] In some embodiments, when the elastic sealing ring is squeezed by the clamping mechanism, the inner periphery of the elastic sealing ring is tightly wrapped around the outer peripheries of the first drainage ring and the second drainage ring, and the inner periphery of the elastic sealing ring is squeezed between the first drainage ring and the second drainage ring.

[0016] In some embodiments, the electrolysis unit further includes an intermediate sealing ring and an end sealing ring, the intermediate sealing ring is clamped between the first drainage ring and the second drainage ring, the membrane electrode is clamped between the first drainage ring and the intermediate sealing ring, or the membrane electrode is clamped between the second drainage ring and the intermediate sealing ring, and the end sealing rings are attached to both sides of the first drainage ring and the second drainage ring facing away from each other.

[0017] In some embodiments, the first guide ring is provided with a hydrogen outlet along the axial direction, and a hydrogen outlet groove is provided on a side of the first guide ring facing away from the second guide ring, one end of the hydrogen outlet groove is connected to the hydrogen outlet, and the other end of the hydrogen outlet groove passes through the inner ring of the first guide ring, and the hydrogen outlet and the hydrogen outlet groove form the hydrogen outlet channel;

[0018] The second drainage ring is provided with a water inlet and a water return port along the axial direction, and a water inlet groove and a water return groove are provided on the side of the second drainage ring facing away from the first drainage ring. One end of the water inlet groove is connected with the water inlet, and the other end of the water inlet groove passes through the inner ring of the second drainage ring. One end of the water return groove is connected with the return water port, and the other end of the water return groove passes through the inner ring of the second drainage ring. The water inlet and the water inlet groove form the water inlet channel, and the water return port and the return water groove form the return water channel.

[0019] In some embodiments, a plurality of water inlet grooves are provided on the side of the second drainage ring facing away from the first drainage ring, one end of the plurality of water inlet grooves is connected to the water inlet, and the other end of the plurality of water inlet grooves extends radially to the inner ring of the second drainage ring.

[0020] In some embodiments, the thickness of the second drainage ring in the axial direction is T1 mm, and the depth of the water inlet groove in the axial direction of the second drainage ring is D1 mm, wherein 0.2≤D1 / T1≤0.7;

[0021] The surface area of ​​the inner ring of the second guide ring is S1mm 2 The total opening area of ​​the plurality of water inlet grooves in the inner ring of the second drainage ring is S2mm 2 , where 0.005≤S2 / S1≤0.03.

[0022] In some embodiments, a plurality of return water grooves are provided on the side of the second drainage ring facing away from the first drainage ring, one end of the plurality of return water grooves is connected to the return water port, and the other end of the plurality of return water grooves radially extends to the inner ring of the second drainage ring.

[0023] In some embodiments, the thickness of the second drainage ring in the axial direction is T1 mm, and the depth of the water return groove in the axial direction of the second drainage ring is D2 mm, wherein 0.2≤D2 / T1≤0.7;

[0024] The surface area of ​​the inner ring of the second guide ring is S1mm 2 The total opening area of ​​the plurality of return water grooves in the inner ring of the second drainage ring is S3mm 2 , where 0.005≤S3 / S1≤0.03.

[0025] In some embodiments, a plurality of hydrogen outlet grooves are provided on a side of the first guide ring facing away from the second guide ring, one end of the plurality of hydrogen outlet grooves is connected to the hydrogen outlet port, and the other end of the plurality of hydrogen outlet grooves radially extends to the inner ring of the first guide ring.

[0026] In some embodiments, the thickness of the first guide ring in the axial direction is T2 mm, and the depth of the hydrogen outlet groove in the axial direction of the first guide ring is D3 mm, wherein 0.2≤D3 / T2≤0.7;

[0027] The surface area of ​​the inner ring of the first guide ring is S4mm 2 The total opening area of ​​the plurality of hydrogen outlet grooves in the inner ring of the first guide ring is S5mm 2 , where 0.005≤S5 / S4≤0.05.

[0028] In some embodiments, the electrolysis unit also includes a titanium filter, which is located inside the inner ring of the second drainage ring, the outer ring of the titanium filter is close to the inner ring of the second drainage ring, and the end of the water inlet trough away from the water inlet is opposite to the outer ring of the titanium filter, and the titanium filter is arranged on the side of the titanium sheet on the side of the membrane electrode close to the second drainage ring.

[0029] In some embodiments, the first drainage ring and the second drainage ring are both made of ppsu.

[0030] Compared with the prior art, the hydrogen production device according to the embodiment of the present invention has the following beneficial effects:

[0031] In the present invention, since the electrolysis structure is used to prepare high-pressure hydrogen, it is in a high-pressure environment. In order to ensure the sealing performance, the present invention provides an outer sealing component on the outside of the electrolysis unit, so that the elastic sealing ring is sleeved on the outer periphery of the electrolysis unit, and then the support ring is sleeved on the outer periphery of the elastic sealing ring. The axial thickness of the elastic sealing ring is greater than the axial thickness of the support ring and the axial thickness of the electrolysis unit. Moreover, both sides of the elastic sealing ring in the axial direction are flat, and the cross-section of the elastic sealing ring is rectangular, so that the electrolysis structure is clamped by the clamping mechanism. When the positive plate and the negative plate are clamped together to clamp the electrolysis structure, the positive plate, the negative plate, the support ring and the electrolysis unit together compress the elastic sealing ring in the sealed space, thereby forming a tight structure, ensuring the sealing between the clamping mechanism, the external sealing component and the electrolysis unit, ensuring that the hydrogen production device has sufficient sealing, making it difficult for high-pressure hydrogen to leak, and making the hydrogen production device more stable. When the clamping mechanism clamps the electrolysis structure, the distance between the positive plate and the negative plate can be adjusted by the adjustment component, so that the positive plate and the negative plate are pressed against the two sides of the electrolysis structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is an exploded view of the overall structure of an embodiment of the present invention;

[0033] Figure 2 It is a three-dimensional diagram of the overall structure of an embodiment of the present invention;

[0034] Figure 3 is a side view of the overall structure of an embodiment of the present invention;

[0035] Figure 4 is a three-dimensional diagram of an electrolytic structure according to an embodiment of the present invention;

[0036] Figure 5 is another perspective view of the electrolysis structure according to an embodiment of the present invention;

[0037] Figure 6 is an exploded view of an electrolytic structure according to an embodiment of the present invention;

[0038] Figure 7 is another exploded view of the electrolytic structure of an embodiment of the present invention;

[0039] Figure 8 is a three-dimensional diagram of a first drainage ring according to an embodiment of the present invention;

[0040] Figure 9 yes Figure 8 A magnified view of point A in the figure;

[0041] Figure 10 is a three-dimensional diagram of a second drainage ring according to an embodiment of the present invention;

[0042] Figure 11 yes Figure 10 Enlarged view of point B in FIG.

[0043] Figure 12 yes Figure 10 Enlarged view of point C in the figure;

[0044] Figure 13 is a cross-sectional view of an electrolytic structure according to an embodiment of the present invention;

[0045] Figure 14 yes Figure 13 The enlarged view of point D in the figure;

[0046] Figure 15 is a schematic diagram of a positioning ring according to an embodiment of the present invention;

[0047] Figure 16 is a cross-sectional view of multiple electrolytic structures according to an embodiment of the present invention;

[0048] Figure 17 yes Figure 16 Enlarged view of point E in .

[0049] In the figure, 100, hydrogen outlet channel; 101, hydrogen outlet; 200, water inlet channel; 201, water inlet; 300, water return channel; 301, water return outlet;

[0050] 1. Electrolysis unit; 11. Membrane electrode; 12. Titanium sheet; 13. First drainage ring; 131. Hydrogen outlet tank; 132. First sealing tank; 14. Second drainage ring; 141. Water inlet tank; 142. Water return tank; 143. Second sealing tank; 15. Intermediate sealing ring; 16. End sealing ring; 17. Titanium filter; 18. Gap;

[0051] 2. External sealing assembly; 21. Support ring; 22. Elastic sealing ring; 23. Support sealing gasket;

[0052] 3. Clamping mechanism; 31. Positive pressure plate; 32. Negative pressure plate; 33. Positive plate; 34. Negative plate; 35. Adjustment assembly; 351. Bolt; 352. Nut; 36. Titanium plate; 37. Positioning ring; 371. Positioning groove; 38. First sealing ring; 39. Second sealing ring;

[0053] 4. Sealing plate; 5. Water inlet joint; 6. Water return joint; 7. Hydrogen outlet joint; 8. Sealed space. DETAILED DESCRIPTION

[0054] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0055] In the description of the present invention, it should be understood that the term "comprising" as used in the present specification refers to the presence of the stated features, integers, steps, operations, parts / components, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, parts / components, components, and / or groups thereof. It should be understood that when we refer to a part / component as being "connected" to another part / component, it can be directly connected to the other part / component, or there can be intermediate parts / components. The term "and / or" as used herein includes all or any one of the associated listed items and all combinations thereof.

[0056] like Figures 1 to 17 As shown, the present invention relates to a hydrogen production device, comprising: an electrolysis structure and a clamping mechanism 3, wherein the clamping mechanism 3 is used to clamp the electrolysis structure.

[0057] The clamping mechanism 3 includes a positive pressure plate 31, a negative pressure plate 32, a positive plate 33, a negative plate 34 and an adjusting component 35. The positive pressure plate 31 and the negative pressure plate 32 are opposite to each other. The positive plate 33 and the negative plate 34 are correspondingly padded on both sides of the positive pressure plate 31 and the negative pressure plate 32. The electrolysis structure is clamped between the positive plate 33 and the negative plate 34. The adjusting component 35 is connected between the positive pressure plate 31 and the negative pressure plate 32 to adjust the distance between the positive pressure plate 31 and the negative pressure plate 32. The side of the positive pressure plate 31 facing away from the negative pressure plate 32 is provided with a water inlet interface, a water return interface and a hydrogen outlet interface connected to the electrolysis structure.

[0058] The electrolysis structure includes an electrolysis unit 1 and an outer sealing assembly 2, wherein the outer sealing assembly 2 includes a support ring 21 and an elastic sealing ring 22, wherein the support ring 21 is sleeved outside the electrolysis unit 1, and a sealed space is formed between the support ring 21, the electrolysis unit 1, the positive plate 33 and the negative plate 34, and the elastic sealing ring 22 is arranged in the sealed space and sleeved on the outer periphery of the electrolysis unit 1. The thickness of the elastic sealing ring 22 in the direction from the positive plate 33 to the negative plate 34 is greater than the thickness of the support ring 21 in the direction from the positive plate 33 to the negative plate 34, and is also greater than the thickness of the electrolysis unit 1 in the direction from the positive plate 33 to the negative plate 34. The cross-section of the elastic sealing ring 22 is rectangular, and the water inlet interface, return water interface and hydrogen outlet interface of the positive plate 31 are all connected to the electrolysis unit 1.

[0059] In the present invention, the electrolysis structure is used to prepare high-pressure hydrogen, so it is in a high-pressure environment. In order to ensure the sealing performance, the present invention is provided with an outer sealing component 2 on the outside of the electrolysis unit 1, so that the elastic sealing ring 22 is sleeved on the outer periphery of the electrolysis unit 1, and then the support ring 21 is sleeved on the outer periphery of the elastic sealing ring 22, and the axial thickness of the elastic sealing ring 22 is greater than the axial thickness of the support ring 21 and the axial thickness of the electrolysis unit 1. Moreover, both sides of the elastic sealing ring 22 in the axial direction are flat, and the cross-section of the elastic sealing ring 22 is rectangular, so that when the clamping mechanism 3 clamps the electrolysis structure, the elastic sealing ring 22 is The sealing ring 22 is deformed by being squeezed, and under the action of the support ring 21 clamping the elastic sealing ring 22, the elastic sealing ring 22 can be pressed against each other with the clamping mechanism 3, and the elastic sealing ring 22 can also clamp the electrolysis unit 1, that is, when the positive plate 33 and the negative plate 34 are driven to clamp the electrolysis structure, the positive plate 33, the negative plate 34, the support ring 21 and the electrolysis unit 1 together compress the elastic sealing ring 22 in the sealed space, thereby forming a tight structure, ensuring the sealing between the clamping mechanism 3, the outer sealing component 2 and the electrolysis unit 1, ensuring that the hydrogen production device can have sufficient sealing, making it difficult for high-pressure hydrogen to leak, and making the hydrogen production device more stable. When the clamping mechanism 3 clamps the electrolysis structure, the distance between the positive plate 31 and the negative plate 32 can be adjusted by the adjustment component 35, so that the positive plate 33 and the negative plate 34 are pressed against the two sides of the electrolysis structure.

[0060] In this embodiment, the electrolysis unit 1 includes a membrane electrode 11, a titanium sheet 12, a first drainage ring 13 and a second drainage ring 14. The first drainage ring 13, the membrane electrode 11 and the second drainage ring 14 are stacked together in sequence. The membrane electrode 11 is circular. The outer diameter of the first drainage ring 13 and the outer diameter of the second drainage ring 14 are both larger than the outer diameter of the membrane electrode 11. The first drainage ring 13 and the second drainage ring 14 clamp the outer periphery of the membrane electrode 11. The first drainage ring 13 A hydrogen outlet channel 100 is provided on it, which is connected to one side of the membrane electrode 11. The second drainage ring 14 is provided with a water inlet channel 200 and a return water channel 300, both of which are connected to the other side of the membrane electrode 11. There are two titanium sheets 12, and the two titanium sheets 12 are correspondingly connected to the two sides of the membrane electrode 11. The water inlet interface, return water interface and hydrogen outlet interface of the positive electrode pressure plate 31 are correspondingly connected to the water inlet channel 200, return water channel 300 and hydrogen outlet channel 100 of the electrolysis unit 1.

[0061] In the present invention, when the electrolysis unit 1 is working, one of the titanium knots 12 serves as an anode and the other titanium knot 12 serves as a cathode. Water flows into the titanium knot 12 serving as the anode through the water inlet channel 200 of the second drainage ring 14 to electrolyze hydrogen ions. The electrolyzed water can then be discharged through the return water channel 300 of the second drainage ring 14. At the same time, the ionized hydrogen ions can pass through the membrane electrode 11 and reach the titanium knot 12 serving as the cathode to react and produce high-pressure hydrogen. The high-pressure hydrogen can enter the hydrogen outlet channel 100 of the first drainage ring 13 to facilitate the collection of the high-pressure hydrogen and complete the preparation of the high-pressure hydrogen.

[0062] Furthermore, since the membrane electrode 11 is clamped between the first drainage ring 13 and the second drainage ring 14, and the outer diameter of the first drainage ring 13 and the outer diameter of the second drainage ring 14 are both larger than the outer diameter of the membrane electrode 11, the first drainage ring 13 and the second drainage ring 14 clamp the outer periphery of the membrane electrode 11, then there will be a gap between the areas of the first drainage ring 13 and the second drainage ring 14 close to the outer circle, so that when the clamping mechanism 3 clamps the electrolysis structure, the inner periphery of the elastic sealing ring 22 will squeeze into the gap between the areas of the first drainage ring 13 and the second drainage ring 14 close to the outer circle, which can strengthen the sealing between the first drainage ring 13 and the second drainage ring 14 and further prevent the leakage of high-pressure hydrogen.

[0063] In addition, since the titanium sheet 12 has a high flatness, after the titanium sheet 12 is attached to the side of the membrane electrode 11, it can be tightly attached to the side of the membrane electrode 11, thereby providing good support for the membrane electrode 11 and ensuring the stability of the electrolysis structure.

[0064] In this embodiment, the outer sealing assembly 2 further includes a supporting sealing gasket 23 . The supporting ring 21 is a stainless steel supporting ring 21 . The supporting sealing gaskets 23 are attached to both sides of the supporting ring 21 in the axial direction.

[0065] Specifically, the support gasket 23 is made of Teflon. First, the support gaskets 23 are attached to both sides of the support ring 21. This allows the support gaskets 23 to be tightly attached to the clamping mechanism 3 after the clamping mechanism 3 clamps the electrolytic structure, further enhancing the sealing effect. Consequently, the electrolytic structure is tightly attached to the clamping mechanism 3 via the elastic sealing ring 22, and also to the clamping mechanism 3 via the support gasket 23, achieving a dual sealing effect and ensuring the sealing of the electrolytic structure. Second, because the support ring 21 is made of stainless steel, it provides sufficient strength to clamp the elastic sealing ring 22, and then the support gaskets 23 are attached to both sides of the stainless steel support ring 21. This eliminates the need for high flatness requirements on both sides of the support ring 21, while ensuring sealing performance. This reduces the difficulty and precision of machining the support ring 21. Third, Teflon's high chemical stability and high temperature resistance ensure that the support gasket 23 has a long service life and is highly practical.

[0066] In this embodiment, the clamping mechanism 3 clamps the electrolysis structure so that when the elastic sealing ring 22 is squeezed, the inner periphery of the elastic sealing ring 22 is tightly wrapped around the outer periphery of the first drainage ring 13 and the second drainage ring 14, and part of the inner periphery of the elastic sealing ring 22 is squeezed into between the first drainage ring 13 and the second drainage ring 14, thereby strengthening the sealing between the first drainage ring 13 and the second drainage ring 14.

[0067] In this embodiment, the elastic sealing ring 22 is a rubber elastic sealing ring 22, so as to ensure the sealing performance of the electrolysis structure.

[0068] In this embodiment, the electrolysis unit 1 further includes an intermediate sealing ring 15, which is sandwiched between the first drainage ring 13 and the second drainage ring 14, and the membrane electrode 11 is sandwiched between the first drainage ring 13 and the intermediate sealing ring 15, or the membrane electrode 11 is sandwiched between the second drainage ring 14 and the intermediate sealing ring 15.

[0069] The first drain ring 13 and the second drain ring 14 are sandwiched by an intermediate sealing ring 15. Made of Teflon, the intermediate sealing ring 15 ensures a tight seal between the first and second drain rings 13, 14 due to its high chemical stability and high temperature resistance, extending the life of the electrolysis structure. The edge of the membrane electrode 11 is then sandwiched between the first drain ring 13 and the intermediate sealing ring 15, or between the second drain ring 14 and the intermediate sealing ring 15. This allows the membrane electrode 11 to block the inner rings of the first and second drain rings 13, 14, and restrict water from passing through the inner ring of the second drain ring 14 to the inner ring of the first drain ring 13, allowing only hydrogen ions to pass through the membrane electrode 11 to the titanium junction sheet 12, which serves as the cathode.

[0070] Preferably, the electrolysis unit 1 further includes an end sealing ring 16 , and the end sealing ring 16 is attached to both sides of the first drainage ring 13 and the second drainage ring 14 facing away from each other.

[0071] The first drain ring 13 and the second drain ring 14 are both provided with end sealing rings 16 on both sides facing away from each other. The end sealing rings 16 are made of Teflon. Due to Teflon's high chemical stability and high temperature resistance, after the clamping mechanism 3 clamps the electrolytic structure, it can ensure the sealing between the electrolytic structure and the clamping mechanism 3, and extend the service life of the electrolytic structure. Moreover, when one of the end sealing rings 16 is attached to the side of the first drain ring 13 facing away from the second drain ring 14, the end sealing ring 16 can also cover the hydrogen outlet groove 131 of the first drain ring 13 and seal the hydrogen outlet groove 131. When the other end sealing ring 16 is attached to the side of the second drain ring 14 facing away from the first drain ring 13, the end sealing ring 16 can also cover the water inlet groove 141 and the water return groove 142 of the second drain ring 14 and seal the water inlet groove 141 and the water return groove 142.

[0072] In this embodiment, the first drainage ring 13 is provided with a first sealing groove 132 along the circumferential direction on both sides in the axial direction, and the second drainage ring 14 is provided with a second sealing groove 143 along the circumferential direction on both sides. After the clamping mechanism 3 clamps the electrolysis structure, the corresponding parts of the intermediate sealing ring 15 on both sides in the axial direction are pressed into the first sealing groove 132 and the second sealing groove 143, and a part of one of the end sealing rings 16 is pressed into the first sealing groove 132 of the first drainage ring 13, and a part of the other end sealing ring 16 is pressed into the second sealing groove 143 of the second drainage ring 14.

[0073] That is, by correspondingly opening the first sealing groove 132 and the second sealing groove 143 on the first drainage ring 13 and the second drainage ring 14, when the clamping mechanism 3 clamps the electrolysis structure, the corresponding parts on both sides of the intermediate sealing ring 15 will be pressed into the first sealing groove 132 of the first drainage ring 13 and the second sealing groove 143 of the second drainage ring 14, which is conducive to strengthening the sealing between the first drainage ring 13 and the second drainage ring 14. At the same time, part of one of the end sealing rings 16 is pressed into the first sealing groove 132 of the first drainage ring 13, and part of the other end sealing ring 16 is pressed into the second sealing groove 143 of the second drainage ring 14, which can strengthen the sealing between the first drainage ring 13 and one of the end sealing rings 16, so that hydrogen will not leak, and also strengthen the sealing between the second drainage ring 14 and the other end sealing ring 16, so that water will not leak.

[0074] In this embodiment, a hydrogen outlet 101 is axially defined in the first guide ring 13 , and a hydrogen outlet groove 131 is defined on the side of the first guide ring 13 facing away from the second guide ring 14 . One end of the hydrogen outlet groove 131 is connected to the hydrogen outlet 101 , and the other end of the hydrogen outlet groove 131 passes through the inner ring of the first guide ring 13 . The hydrogen outlet 101 and the hydrogen outlet groove 131 form the hydrogen outlet channel 100 .

[0075] The second drainage ring 14 is provided with a water inlet 201 and a return water port 301 along the axial direction, and the second drainage ring 14 is provided with a water inlet groove 141 and a return water groove 142 on the side facing away from the first drainage ring 13. One end of the water inlet groove 141 is connected to the water inlet 201, and the other end of the water inlet groove 141 passes through the inner circle of the second drainage ring 14, one end of the return water groove 142 is connected to the return water port 301, and the other end of the return water groove 142 passes through the inner circle of the second drainage ring 14, the water inlet 201 and the water inlet groove 141 form the water inlet channel 200, and the return water port 301 and the return water groove 142 form the return water channel 300.

[0076] Specifically, the first drainage ring 13, the second drainage ring 14, the middle sealing ring 15 and the end sealing ring 16 are all provided with the water inlet 201, the water return port 301 and the hydrogen outlet 101. Multiple water inlets 201 are connected together, multiple water return ports 301 are connected together, and multiple hydrogen outlets 101 are connected together. By providing the water inlet 201, the water return port 301, and the hydrogen outlet 101 on the first drainage ring 13, the second drainage ring 14, the middle sealing ring 15, and the end sealing ring 16, multiple electrolysis structures can be stacked. After water is injected into the water inlet 201 of the outermost electrolysis structure, the water can flow into the multiple electrolysis structures along the multiple water inlets 201. In addition, due to the arrangement of the middle sealing ring 15 and the end sealing ring 16, water can only enter the inner ring of the second drainage ring 14 through the water inlet groove 141. After electrolysis, the water enters the multiple water return ports 301 through the water return groove 142. Then, after the hydrogen ions at the titanium sheet 12 serving as the cathode react to generate hydrogen, the hydrogen can enter the hydrogen outlet 101 along the hydrogen outlet groove 131. This facilitates the simultaneous water supply, water recovery, and hydrogen collection of the multiple electrolysis structures, and can facilitate the user to stack the electrolysis structures as needed, thereby achieving high practicality.

[0077] In this embodiment, a plurality of water inlet grooves 141 are provided on the side of the second drainage ring 14 facing away from the first drainage ring 13 , one end of the plurality of water inlet grooves 141 is connected to the water inlet 201 of the second drainage ring 14 , and the other end of the plurality of water inlet grooves 141 extends radially to the inner circle of the second drainage ring 14 .

[0078] There are multiple water inlet grooves 141, one end of each of the water inlet grooves 141 is connected to the water inlet 201 of the second drainage ring 14, and the other end of each of the water inlet grooves 141 extends radially to the inner circle of the second drainage ring 14. Therefore, on the one hand, water can be quickly injected into the titanium junction sheet 12 serving as the anode through the multiple water inlet grooves 141, which is beneficial to speed up the water injection efficiency and improve the electrolysis efficiency; on the other hand, the multiple water inlet grooves 141 extend radially to the inner circle of the second drainage ring 14, so that water can more quickly and evenly soak the titanium junction sheet 12 serving as the anode. Moreover, since the interior of the electrolysis structure is a high-pressure environment, the multiple water inlet grooves 141 are extended radially, so that the openings of the multiple water inlet grooves 141 located in the inner circle of the second drainage ring 14 can maintain a sufficient distance from each other, and the structural strength of the second drainage ring 14 is not easily affected by the setting of the multiple water inlet grooves 141, so that the second drainage ring 14 can still maintain sufficient structural strength under high-pressure environment, thereby ensuring the stability of the electrolysis structure.

[0079] Preferably, the axial thickness of the second guide ring 14 is T1 mm, and the axial depth of the water inlet groove 141 in the second guide ring 14 is D1 mm, wherein 0.2≤D1 / T1≤0.7. The value of D1 / T1 can be 0.2, 0.3, 0.4, 0.5, 0.6 or 0.7.

[0080] When D1 / T1 is too large, the axial thickness of the second drainage ring 14 is small, or the axial depth of the water inlet groove 141 in the second drainage ring 14 is large, which will cause the structural strength of the second drainage ring 14 to become weak; when D1 / T1 is too small, the thickness of the second drainage ring 14 is large, which will cause the volume of the electrolysis structure to be too large, or the axial depth of the water inlet groove 141 in the second drainage ring 14 is small, which will affect the efficiency of water injection into the titanium sheet 12 and affect the hydrogen production efficiency. Therefore, maintaining 0.2≤D1 / T1≤0.7 can ensure the hydrogen production efficiency of the electrolysis structure and ensure that the electrolysis structure has sufficient strength.

[0081] Furthermore, the surface area of ​​the inner circumference of the inner ring of the second guide ring 14 is S1mm 2 The total opening area of ​​the plurality of water inlet grooves 141 in the inner ring of the second drainage ring 14 is S2mm 2 , where 0.005≤S2 / S1≤0.03. The value of S2 / S1 can be 0.008, 0.01, 0.015, 0.02, 0.025 or 0.028.

[0082] Since the second drainage ring 14 is weaker at the position where the water inlet groove 141 is opened, the more position of the second drainage ring 14 occupied by the water inlet groove 141, the weaker the structural strength of the second drainage ring 14 will be. When S2 / S1 is large, the more position of the second drainage ring 14 occupied by the water inlet groove 141 will be affected, which will affect the structural strength of the second drainage ring 14. When S2 / S1 is small, the water inlet groove 141 occupies less position of the second drainage ring 14. Although the structural strength of the second drainage ring 14 can be ensured, the efficiency of water injection into the titanium sheet 12 will be affected. Therefore, maintaining 0.005≤S2 / S1≤0.03 can ensure the structural strength of the second drainage ring 14, and also ensure the water injection efficiency and hydrogen production efficiency.

[0083] In this embodiment, a plurality of return water grooves 142 are provided on the side of the second drainage ring 14 facing away from the first drainage ring 13 , one end of the plurality of return water grooves 142 is connected to the return water port 301 of the second drainage ring 14 , and the other end of the plurality of return water grooves 142 extends radially to the inner circle of the second drainage ring 14 .

[0084] There are multiple return water grooves 142, one end of each of the return water grooves 142 is connected to the return water port 301 of the second drainage ring 14, and the other end of each of the return water grooves 142 extends radially to the inner circle of the second drainage ring 14. Therefore, on the one hand, water can quickly flow from the titanium sheet 12 serving as the anode to the return water port 301 through the multiple return water grooves 142, which is beneficial to speeding up the water recovery efficiency and will not affect the electrolysis efficiency; on the other hand, since the interior of the electrolysis structure is a high-pressure environment, extending the multiple return water grooves 142 radially can allow the openings of the multiple return water grooves 142 located in the inner circle of the second drainage ring 14 to maintain a sufficient distance from each other, and it is not easy for the setting of the multiple return water grooves 142 to affect the structural strength of the second drainage ring 14, so that the second drainage ring 14 can still maintain sufficient structural strength under high-pressure environment, thereby ensuring the stability of the electrolysis structure.

[0085] Preferably, the axial thickness of the second drainage ring 14 is T1 mm, and the axial depth of the water return groove 142 in the second drainage ring 14 is D2 mm, wherein 0.2≤D2 / T1≤0.7. The value of D2 / T1 can be 0.2, 0.3, 0.4, 0.5, 0.6 or 0.7.

[0086] When D2 / T1 is too large, the axial thickness of the second drainage ring 14 is small, or the axial depth of the return water groove 142 in the second drainage ring 14 is large, which will cause the structural strength of the second drainage ring 14 to become weak; when D2 / T1 is too small, the thickness of the second drainage ring 14 is large, which will cause the volume of the electrolysis structure to be too large, or the axial depth of the return water groove 142 in the second drainage ring 14 is small, which will affect the efficiency of water exiting the titanium sheet 12 and the electrolysis efficiency. Therefore, maintaining 0.2≤D2 / T1≤0.7 can ensure the hydrogen production efficiency of the electrolysis structure and ensure that the electrolysis structure has sufficient structural strength.

[0087] Furthermore, the surface area of ​​the inner circumference of the inner ring of the second guide ring 14 is S1mm 2 The total opening area of ​​the plurality of return water grooves 142 in the inner ring of the second drainage ring 14 is S3mm 2 , where 0.005≤S3 / S1≤0.03. The value of S3 / S1 can be 0.005, 0.008, 0.01, 0.015, 0.02, 0.025, 0.028 or 0.03.

[0088] Since the second drainage ring 14 is weaker at the position where the return water groove 142 is opened, the more position of the second drainage ring 14 is occupied by the return water groove 142, the weaker the structural strength of the second drainage ring 14 will be. When S3 / S1 is large, the more position of the second drainage ring 14 is occupied by the return water groove 142, which will affect the structural strength of the second drainage ring 14. When S3 / S1 is small, the return water groove 142 occupies less position of the second drainage ring 14. Although it can ensure the structural strength of the second drainage ring 14, it will affect the efficiency of water exiting the titanium sheet 12. Therefore, maintaining 0.005≤S3 / S1≤0.03 can ensure the structural strength of the second drainage ring 14 and the hydrogen production efficiency.

[0089] In this embodiment, a plurality of hydrogen outlet grooves 131 are provided on a side of the first guide ring 13 facing away from the second guide ring 14 , one end of the plurality of hydrogen outlet grooves 131 is connected to the hydrogen outlet 101 of the first guide ring 13 , and the other end of the plurality of hydrogen outlet grooves 131 extends radially to the inner circle of the first guide ring 13 .

[0090] There are multiple hydrogen outlet grooves 131, one end of each of the multiple hydrogen outlet grooves 131 is connected to the hydrogen outlet 101 of the first drainage ring 13, and the other ends of the multiple hydrogen outlet grooves 131 extend radially to the inner ring of the first drainage ring 13. Therefore, on the one hand, the hydrogen produced by the reaction at the titanium sheet 12 serving as the cathode can quickly enter the hydrogen outlet 101 through the multiple hydrogen outlet grooves 131; on the other hand, the multiple hydrogen outlet grooves 131 extend radially to the inner ring of the first drainage ring 13, so that hydrogen can be collected more quickly. Moreover, since the interior of the electrolysis structure is a high-pressure environment, the multiple hydrogen outlet grooves 131 are extended radially, so that the openings of the multiple hydrogen outlet grooves 131 located in the inner ring of the first drainage ring 13 can maintain a sufficient distance from each other, and the structural strength of the first drainage ring 13 is not easily affected by the setting of the multiple hydrogen outlet grooves 131. The first drainage ring 13 still maintains sufficient structural strength under a high-pressure environment, thereby ensuring the stability of the electrolysis structure.

[0091] Preferably, the thickness of the first guide ring 13 in the axial direction is T2 mm, and the depth of the hydrogen outlet groove 131 in the axial direction of the first guide ring 13 is D3 mm, wherein 0.2≤D3 / T2≤0.7. The value of D3 / T2 can be 0.2, 0.3, 0.4, 0.5, 0.6 or 0.7.

[0092] When D3 / T2 is too large, the axial thickness of the first drainage ring 13 is small, or the axial depth of the hydrogen outlet groove 131 in the first drainage ring 13 is large, which will cause the structural strength of the first drainage ring 13 to become weak; when D3 / T2 is too small, the thickness of the first drainage ring 13 is large, which will cause the volume of the electrolysis structure to be too large, or the axial depth of the hydrogen outlet groove 131 in the first drainage ring 13 is small, which will affect the hydrogen recovery efficiency. Therefore, maintaining 0.2≤D3 / T2≤0.7 can ensure the efficiency of the electrolysis structure in collecting hydrogen and ensure that the electrolysis structure has sufficient structural strength.

[0093] Furthermore, the surface area of ​​the inner ring of the first guide ring 13 is S4mm 2 The total opening area of ​​the plurality of hydrogen outlet grooves 131 in the inner ring of the first guide ring 13 is S5mm 2 , where 0.005≤S5 / S4≤0.05. The value of S5 / S4 can be 0.005, 0.008, 0.01, 0.015, 0.02, 0.025, 0.03, 0.035, 0.04, 0.045 or 0.05.

[0094] Since the first drainage ring 13 is weaker at the position where the hydrogen outlet groove 131 is opened, the more position of the first drainage ring 13 occupied by the hydrogen outlet groove 131, the weaker the structural strength of the first drainage ring 13 will be. When S5 / S4 is large, the more position of the first drainage ring 13 occupied by the hydrogen outlet groove 131 will be affected, which will affect the structural strength of the first drainage ring 13. When S5 / S4 is small, the hydrogen outlet groove 131 occupies less position of the first drainage ring 13. Although the structural strength of the first drainage ring 13 can be ensured, the efficiency of hydrogen entering the hydrogen outlet 101 will be affected. Therefore, maintaining 0.005≤S5 / S4≤0.05 can ensure the structural strength of the first drainage ring 13 and also ensure the hydrogen collection efficiency.

[0095] In addition, in the present invention, the axial thickness T1 of the second drainage ring 14 is greater than the axial thickness T2 of the first drainage ring 13. Since water will pass through the water inlet 201 to the water inlet groove 141 of the second drainage ring 14 and enter the second drainage ring 14, that is, the second drainage ring 14 will also be impacted by water. Moreover, the second drainage ring 14 is provided with the water inlet groove 141 and the return water groove 142, so the structural strength of the second drainage ring 14 is affected to a certain extent. However, the first drainage ring 13 is only provided with the hydrogen outlet groove 131, so the structural strength of the first drainage ring 13 is less affected. Therefore, considering that the axial size of the electrolysis structure will not be too large, the axial thickness T1 of the second drainage ring 14 is made greater than the axial thickness T2 of the first drainage ring 13, so as to ensure the overall stability of the electrolysis structure and avoid the axial size of the electrolysis structure being too large.

[0096] In this embodiment, the water inlet 201 and the water return port 301 of the second drainage ring 14 are evenly distributed along the circumference of the second drainage ring 14 , and the end of the water inlet groove 141 away from the water inlet 201 and the end of the water return groove 142 away from the water return port 301 are oppositely arranged.

[0097] Since the water in the water inlet 201 enters the inner ring of the second drainage ring 14 through the water inlet groove 141 of the second drainage ring 14, and after passing through the titanium sheet 12, the water can enter the return water port 301 through the return water groove 142 of the second drainage ring 14, the water inlet 201 and the return water port 301 of the second drainage ring 14 are evenly distributed along the circumference of the second drainage ring 14, so as to facilitate better and more uniform wetting of the entire surface of the titanium sheet 12 by the water, thereby improving the efficiency of electrolysis and preventing the titanium sheet 12 from ablating the membrane electrode 11 or other components. Moreover, the end of the water inlet groove 141 away from the water inlet 201 and the end of the return water groove 142 away from the return water port 301 are arranged relative to each other, which facilitates smoother entry and exit of water and ensures the amount of electrolyte.

[0098] In this embodiment, the electrolysis unit 1 also includes a titanium filter 17, which is located in the inner circle of the second drainage ring 14, and the outer circle of the titanium filter 17 is close to the inner circle of the second drainage ring 14, and the end of the water inlet trough 141 away from the water inlet 201 is opposite to the outer circle of the titanium filter 17, and the titanium filter 17 is attached to the side of the titanium sheet 12 on the side of the membrane electrode 11 close to the second drainage ring 14.

[0099] By allowing the titanium filter 17 to be attached to the side of the titanium sheet 12 on the side of the membrane electrode 11 close to the second drainage ring 14, that is, the titanium filter 17 can be attached to the side of the titanium sheet 12 serving as the anode, on the one hand, the titanium filter 17 can play a filtering role, preventing foreign matter from entering the titanium sheet 12 and the membrane electrode 11 and affecting the electrolysis of water; on the other hand, the titanium filter 17 is a mesh structure, so under the capillary action of the titanium filter 17, water enters the titanium filter After 17, it can guide water to quickly and evenly penetrate the surface of the titanium filter 17, so that water can flow more quickly and evenly to the surface of the titanium sheet 12 serving as the anode, which is beneficial to accelerating the electrolysis efficiency and improving the hydrogen production efficiency. Moreover, since the titanium sheet 12 will quickly generate heat after being energized, the provision of the titanium filter 17 can help water quickly cover the entire surface of the titanium sheet 12, and can prevent the parts of the titanium sheet 12 that are not wetted by water from overheating and eventually ablating the membrane electrode 11 or other components. At the same time, because the titanium filter 17 has high mechanical strength and toughness, it can withstand greater pressure and mechanical impact without being easily deformed or damaged. Compared with other metal filters, the titanium filter 17 can maintain long-term stability under high pressure or harsh working environments, which is beneficial to improving the service life of the electrolysis structure.

[0100] In this embodiment, the first drainage ring 13 and the second drainage ring 14 are both made of PPSU.

[0101] PPSU (polyphenylsulfone) is a high-performance engineering plastic with the advantages of high temperature resistance, chemical corrosion resistance, and good mechanical properties. It can have a long service life in electrolytic hydrogen production technology, thereby improving the service life of the electrolytic structure.

[0102] In this embodiment, multiple electrolytic structures are provided, and the multiple electrolytic structures are stacked in sequence, with a titanium plate 36 positioned between two adjacent electrolytic structures. Furthermore, in the electrolytic structure adjacent to the positive electrode plate 33, the support ring 21, the electrolytic cell 1, the positive electrode plate 33, and the titanium plate 36 cooperate to form the sealed space. In the electrolytic structure adjacent to the negative electrode plate 34, the support ring 21, the electrolytic cell 1, the negative electrode plate 34, and the titanium plate 36 form the sealed space. In other electrolytic structures, the support ring 21, the electrolytic cell 1, and two adjacent titanium plates 36 form the sealed space. In two adjacent electrolytic structures, the titanium filter 17 of one electrolytic structure and the titanium sheet 12 of the other electrolytic structure are in contact with both sides of the titanium plate 36.

[0103] Specifically, the titanium junction 12 serving as the cathode in the electrolytic structure near the negative plate 34 contacts the negative plate 34, and the titanium filter 17 in the electrolytic structure near the positive plate 33 contacts the positive plate 33. Then, in the two adjacent electrolytic structures, the titanium filter 17 of one electrolytic structure and the titanium junction 12 of the other electrolytic structure are correspondingly attached to both sides of the titanium plate 36, so that when the positive plate 33 and the negative plate 34 are energized, multiple electrolytic structures are also energized.

[0104] In this embodiment, a plurality of positioning rings 37 are further included, and the plurality of positioning rings 37 are arranged one by one on one side of the plurality of electrolytic structures close to the positive electrode pressure plate 31. The inner diameter of the positioning ring 37 is greater than or equal to the outer diameter of the electrolytic unit 1. A positioning groove 371 is circumferentially provided on the side of the positioning ring 37 close to the electrolytic structure, and a portion of the elastic sealing ring 22 enters the positioning groove 371.

[0105] Specifically, a positioning ring 37 is provided between two adjacent electrolytic structures. When the positioning ring 37 is located between the two adjacent electrolytic structures, the positioning ring 37 is located between the electrolytic structure and the titanium plate 36, and a first sealing ring 38 is provided between the positioning ring 37 and the titanium plate 36. The first sealing ring 38 is made of Teflon; a positioning ring 37 is also provided between the electrolytic structure close to the positive plate 33 and the positive plate 33, and a second sealing ring 39 is provided between the positioning ring 37 and the positive plate 33. The second sealing ring 39 is made of Teflon.

[0106] In this embodiment, a sealing plate 4 is provided between the positive electrode pressure plate 31 and the positive electrode plate 33, and a sealing plate 4 is provided between the negative electrode pressure plate 32 and the negative electrode plate 34. The sealing plate 4 is made of Teflon to allow the positive electrode pressure plate 31 and the positive electrode plate 33 to have a higher sealing performance after being attached, and to allow the negative electrode pressure plate 32 and the negative electrode plate 34 to have a higher sealing performance after being attached.

[0107] It should be noted that the titanium plate 36, the positive plate 33 and the positive pressure plate 31 are also provided with a water inlet 201, a return water port 301 and a hydrogen outlet 101, and the titanium plate 36, the positive plate 33, the positive pressure plate 31 and the water inlet 201, the return water port 301 and the hydrogen outlet 101 of the electrolysis unit 1 are correspondingly connected, and the positive pressure plate 31 is provided with a water inlet interface, a return water interface and a hydrogen outlet interface corresponding to the water inlet 201, the return water port 301 and the hydrogen outlet 101 of the electrolysis unit 1 on the side facing away from the negative pressure plate 32, and the water inlet interface, the return water interface and the hydrogen outlet interface are correspondingly installed with a water inlet connector 5, a return water connector 6 and a hydrogen outlet connector 7, so that the hydrogen production device can transport and recycle water at the positive pressure plate 31, and can also collect hydrogen.

[0108] In this embodiment, there are multiple adjustment components 35, and the multiple adjustment components 35 are evenly distributed along the circumference of the positive electrode pressure plate 31. The adjustment component 35 can be a combination of a bolt 351 and a nut 352. The bolt 351 passes through the negative electrode pressure plate 32 and the positive electrode pressure plate 31 in sequence. The nut 352 is threadedly connected to the bolt 351, and the nut 352 is tightly pressed against the side of the positive electrode pressure plate 31 facing away from the negative electrode pressure plate 32, so that the positive electrode pressure plate 31 and the negative electrode pressure plate 32 can clamp the electrolytic structure when the nut 352 is tightened.

[0109] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A hydrogen production device, characterized in that: include: an electrolysis structure and a clamping mechanism, wherein the clamping mechanism is used to clamp the electrolysis structure; The clamping mechanism includes a positive pressure plate, a negative pressure plate, a positive plate, a negative plate and an adjustment component, the positive pressure plate and the negative pressure plate are opposite to each other, the positive plate and the negative plate are correspondingly padded on both sides of the positive pressure plate and the negative pressure plate opposite to each other, the electrolysis structure is clamped between the positive plate and the negative plate, the adjustment component is connected between the positive pressure plate and the negative pressure plate to adjust the distance between the positive pressure plate and the negative pressure plate, and the positive pressure plate is provided with a water inlet interface, a water return interface and a hydrogen outlet interface on the side facing away from the negative pressure plate; The electrolysis structure includes an electrolysis unit and an outer sealing assembly, the outer sealing assembly includes a support ring and an elastic sealing ring, the support ring is sleeved outside the electrolysis unit, a sealed space is formed between the support ring, the electrolysis unit, the positive plate and the negative plate, the elastic sealing ring is arranged in the sealed space and sleeved on the outer periphery of the electrolysis unit, the thickness of the elastic sealing ring in the direction from the positive plate to the negative plate is greater than the thickness of the support ring in the direction from the positive plate to the negative plate, and is also greater than the thickness of the electrolysis unit in the direction from the positive plate to the negative plate, the cross-section of the elastic sealing ring is rectangular, and the water inlet interface, the return water interface and the hydrogen outlet interface of the positive plate are all connected to the electrolysis unit; The electrolysis unit includes a membrane electrode, a titanium sheet, a first drainage ring and a second drainage ring, the first drainage ring, the membrane electrode and the second drainage ring are stacked together in sequence, the membrane electrode is circular, the outer diameter of the first drainage ring and the outer diameter of the second drainage ring are both larger than the outer diameter of the membrane electrode, the first drainage ring and the second drainage ring clamp the outer periphery of the membrane electrode, the first drainage ring is provided with a hydrogen outlet channel connected to one side of the membrane electrode, the second drainage ring is provided with a water inlet channel and a water return channel both connected to the other side of the membrane electrode, two titanium sheets are provided, and the two titanium sheets are correspondingly connected to the two sides of the membrane electrode, the water inlet interface, the water return interface and the hydrogen outlet interface of the positive electrode pressure plate are correspondingly connected to the water inlet channel, the water return channel and the hydrogen outlet channel of the electrolysis unit; When the elastic sealing ring is squeezed by the clamping mechanism, the inner periphery of the elastic sealing ring is tightly wrapped around the outer peripheries of the first drainage ring and the second drainage ring, and the inner periphery of the elastic sealing ring is squeezed between the first drainage ring and the second drainage ring.

2. The hydrogen production device according to claim 1, characterized in that The electrolytic structures are provided in plurality and are stacked in sequence, with a titanium plate provided between two adjacent electrolytic structures; and in the electrolytic structure adjacent to the positive electrode plate, the support ring, the electrolytic unit, the positive electrode plate, and the titanium plate cooperate to form the sealed space; In the electrolysis structure adjacent to the negative electrode plate, the support ring and the electrolysis unit form the sealed space with the negative electrode plate and the titanium plate; In other electrolysis structures, the support ring, the electrolysis unit, and the two adjacent titanium plates form the sealed space.

3. The hydrogen production device according to claim 1 or 2, characterized in that: It also includes a positioning ring, which is arranged on the side of the electrolysis structure close to the positive electrode pressure plate. The side of the positioning ring close to the electrolysis structure is circumferentially provided with a positioning groove, and part of the elastic sealing ring enters the positioning groove.

4. The hydrogen production device according to claim 1, characterized in that The outer sealing assembly further comprises a supporting sealing gasket, wherein the supporting ring is a stainless steel supporting ring, and the supporting sealing gaskets are attached to both sides of the supporting ring.

5. The hydrogen production device according to claim 1, characterized in that: The electrolysis unit also includes an intermediate sealing ring and an end sealing ring. The intermediate sealing ring is sandwiched between the first drainage ring and the second drainage ring, and the membrane electrode is sandwiched between the first drainage ring and the intermediate sealing ring, or the membrane electrode is sandwiched between the second drainage ring and the intermediate sealing ring. The end sealing rings are attached to both sides of the first drainage ring and the second drainage ring facing away from each other.

6. The hydrogen production device according to claim 1, characterized in that: The first guide ring is provided with a hydrogen outlet along the axial direction, and a hydrogen outlet groove is provided on a side of the first guide ring facing away from the second guide ring, one end of the hydrogen outlet groove is connected to the hydrogen outlet, and the other end of the hydrogen outlet groove passes through the inner ring of the first guide ring, and the hydrogen outlet and the hydrogen outlet groove form the hydrogen outlet channel; The second drainage ring is provided with a water inlet and a water return port along the axial direction, and a water inlet groove and a water return groove are provided on the side of the second drainage ring facing away from the first drainage ring. One end of the water inlet groove is connected with the water inlet, and the other end of the water inlet groove passes through the inner ring of the second drainage ring. One end of the water return groove is connected with the return water port, and the other end of the water return groove passes through the inner ring of the second drainage ring. The water inlet and the water inlet groove form the water inlet channel, and the water return port and the return water groove form the return water channel.

7. The hydrogen production device according to claim 6, characterized in that: A plurality of water inlet grooves are provided on a side of the second drainage ring facing away from the first drainage ring. One end of the plurality of water inlet grooves is connected to the water inlet, and the other end of the plurality of water inlet grooves radially extends to the inner ring of the second drainage ring.

8. The hydrogen production device according to claim 7, characterized in that: The thickness of the second drainage ring in the axial direction is T1 mm, and the depth of the water inlet groove in the axial direction of the second drainage ring is D1 mm, wherein 0.2≤D1 / T1≤0.7; The surface area of ​​the inner ring of the second guide ring is S1mm 2 The total opening area of ​​the plurality of water inlet grooves in the inner ring of the second drainage ring is S2mm 2 , where 0.005≤S2 / S1≤0.

03.

9. The hydrogen production device according to claim 6, characterized in that: A plurality of return water grooves are provided on the side of the second drainage ring facing away from the first drainage ring. One end of the plurality of return water grooves is connected to the return water port, and the other end of the plurality of return water grooves radially extends to the inner ring of the second drainage ring.

10. The hydrogen production device according to claim 9, characterized in that: The thickness of the second drainage ring in the axial direction is T1 mm, and the depth of the return water groove in the axial direction of the second drainage ring is D2 mm, wherein 0.2≤D2 / T1≤0.7; The surface area of ​​the inner ring of the second guide ring is S1mm 2 The total opening area of ​​the plurality of return water grooves in the inner ring of the second drainage ring is S3mm 2 , where 0.005≤S3 / S1≤0.

03.

11. The hydrogen production device according to claim 6, characterized in that: A plurality of hydrogen outlet grooves are provided on a side of the first guide ring facing away from the second guide ring. One end of the plurality of hydrogen outlet grooves is connected to the hydrogen outlet port, and the other end of the plurality of hydrogen outlet grooves radially extends to the inner ring of the first guide ring.

12. The hydrogen production device according to claim 11, characterized in that: The thickness of the first guide ring in the axial direction is T2 mm, and the depth of the hydrogen outlet groove in the axial direction of the first guide ring is D3 mm, wherein 0.2≤D3 / T2≤0.7; The surface area of ​​the inner ring of the first guide ring is S4mm 2 The total opening area of ​​the plurality of hydrogen outlet grooves in the inner ring of the first guide ring is S5mm 2 , where 0.005≤S5 / S4≤0.

05.

13. The hydrogen production device according to claim 6, characterized in that: The electrolysis unit also includes a titanium filter, which is located inside the inner ring of the second drainage ring, the outer ring of the titanium filter is close to the inner ring of the second drainage ring, and the end of the water inlet trough away from the water inlet is opposite to the outer ring of the titanium filter, and the titanium filter is arranged on the side of the titanium sheet on the side of the membrane electrode close to the second drainage ring.

14. The hydrogen production device according to claim 1, characterized in that: The first drainage ring and the second drainage ring are both made of ppsu.

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