Electrolysis structure and hydrogen production device

Abstract

The invention discloses an electrolysis structure and a hydrogen production device.The electrolysis structure comprises an electrolysis unit and an outer sealing assembly, the electrolysis unit comprises a membrane electrode, a titanium junction piece, a first drainage ring and a second drainage ring, the first drainage ring, the membrane electrode and the second drainage ring are sequentially stacked together, a hydrogen outlet channel is formed in the first drainage ring, and a hydrogen outlet channel is formed in the second drainage ring; the second drainage ring is provided with a water inlet channel and a water return channel, the two titanium flakes are correspondingly connected to the two sides of the membrane electrode, the outer sealing assembly comprises a supporting ring and an elastic sealing ring, the supporting ring sleeves the periphery of the elastic sealing ring, the elastic sealing ring sleeves the periphery of the electrolysis unit, and the water inlet channel and the water return channel are communicated with each other. The thickness of the elastic sealing ring in the axial direction is larger than the thickness of the supporting ring in the axial direction and is also larger than the thickness of the electrolysis unit in the axial direction. When the electrolysis structure is used, enough sealing performance can be achieved, and leakage is prevented.

Description

Technical Field

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

[0002] With the rapid development of new energy, hydrogen has gradually gained attention due to its advantages of cleanliness, pollution-free, high efficiency, storability and convenient transportation. Hydrogen is generally stored in gas cylinders after preparation, and hydrogen is compressed into the gas cylinder to form high-pressure hydrogen in the gas cylinder.

[0003] After the traditional atmospheric pressure water electrolysis process produces hydrogen, in order to store the hydrogen in a gas cylinder, an additional gas compression pump is required to allow the hydrogen in the gas cylinder to reach a predetermined pressure. This process is relatively cumbersome.

[0004] In this regard, the hydrogen production device currently uses PEM (Proton Exchange Membrane) water electrolysis hydrogen production technology to directly prepare high-pressure hydrogen. The existing hydrogen production device includes a clamping mechanism and an electrolysis structure. The clamping mechanism is used to clamp the electrolysis structure. The electrolysis structure can generate high-pressure hydrogen therein when power is supplied. If the sealing performance between the outer peripheral side of the electrolysis structure and the clamping mechanism is poor, hydrogen leakage is likely to occur on the outer peripheral side of the electrolysis structure. Therefore, in order to prevent leakage of high-pressure hydrogen, it is necessary to ensure that the electrolysis structure has sufficient sealing performance after assembly. Summary of the invention

[0005] The primary purpose of the present invention is to provide an electrolysis structure with sufficient sealing performance to ensure that high-pressure hydrogen is not easily leaked.

[0006] Another object of the present invention is to provide a hydrogen production device using the above electrolysis structure.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] An electrolysis structure, comprising:

[0009] An electrolysis unit, comprising a membrane electrode, a titanium sheet, a first drainage ring and a second drainage ring, wherein the first drainage ring, the membrane electrode and the second drainage ring are sequentially stacked together, 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;

[0010] An outer sealing assembly comprises a support ring and an elastic sealing ring, wherein the support ring is sleeved on the outer periphery of the elastic sealing ring, and the elastic sealing ring is sleeved on the outer periphery of the electrolysis unit. The axial thickness of the elastic sealing ring is greater than both the axial thickness of the support ring and the axial thickness of the electrolysis unit, and both sides of the elastic sealing ring in the axial direction are planes.

[0011] 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.

[0012] In some embodiments, when the elastic sealing ring is squeezed by axial force, the inner periphery of the elastic sealing ring is tightly wrapped around the outer periphery of the first drainage ring and the second drainage ring, and the inner periphery of the elastic sealing ring is squeezed into between the first drainage ring and the second drainage ring.

[0013] In some embodiments, the electrolysis unit also includes an intermediate sealing ring, which 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.

[0014] In some embodiments, the electrolysis unit further includes an end sealing ring, and the end sealing ring is attached to both sides of the first drainage ring and the second drainage ring facing away from each other.

[0015] In some embodiments, first sealing grooves are circumferentially opened on both sides of the first drainage ring, second sealing grooves are circumferentially opened on both sides of the second drainage ring, corresponding parts on both sides of the middle sealing ring are pressed into the first sealing groove and the second sealing groove, part of one of the end sealing rings is pressed into the first sealing groove, and part of the other end sealing ring is pressed into the second sealing groove.

[0016] In some embodiments, the middle sealing ring and the end sealing rings are both made of Teflon.

[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 axially provided with a water inlet and a water return port, and the second drainage ring is provided with a water inlet groove and a water return groove on the side 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 circle of the second drainage ring, one end of the water return groove is connected with the water return port, and the other end of the water return groove passes through the inner circle 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 water return groove form the water return channel.

[0019] In some embodiments, the electrolysis unit also includes a titanium filter, which is located inside the inner circle of the second drainage ring, the outer circle of the titanium filter is close to the inner circle of the second drainage ring, and the end of the water inlet trough away from the water inlet is opposite to the outer circle 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.

[0020] In some embodiments, 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 circle of the second drainage ring.

[0021] 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;

[0022] 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.

[0023] In some embodiments, a plurality of return water grooves are provided on a 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 circle of the second drainage ring.

[0024] 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;

[0025] 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.

[0026] 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.

[0027] 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;

[0028] 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.

[0029] In some embodiments, the water inlet and the water return port of the second drainage ring are evenly distributed along the circumference of the second drainage ring, and one end of the water inlet groove away from the water inlet and one end of the water return groove away from the water return port are relatively arranged.

[0030] In some embodiments, the first drainage ring and the second drainage ring are both made of ppsu.

[0031] The invention also relates to a hydrogen production device, comprising the electrolysis structure.

[0032] Compared with the prior art, the electrolysis structure of the embodiment of the present invention has the following beneficial effects:

[0033] In the present invention, when the electrolysis unit is working, one of the titanium sheets serves as an anode and the other titanium sheet serves as a cathode. Water flows into the titanium sheet serving as an anode through the water inlet channel of the second drainage ring to electrolyze hydrogen ions. The electrolyzed water can then be discharged through the return water channel of the second drainage ring. At the same time, the ionized hydrogen ions can pass through the membrane electrode and reach the titanium sheet serving as the cathode to react and produce high-pressure hydrogen. The high-pressure hydrogen can enter the hydrogen outlet channel of the first drainage ring to facilitate the collection of the high-pressure hydrogen and complete the preparation of the high-pressure hydrogen. 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 sleeves an outer sealing component on the outside of the electrolysis unit, allows the elastic sealing ring to be sleeved on the outer periphery of the electrolysis unit, and then allows the support ring to be sleeved on the outer periphery of the elastic sealing ring, and the thickness of the elastic sealing ring in the axial direction is greater than the thickness of the support ring in the axial direction and the thickness of the electrolysis unit in the axial direction. Moreover, both sides of the elastic sealing ring in the axial direction are planes, and the cross-section of the elastic sealing ring is rectangular, so that when the clamping mechanism clamps the electrolysis structure, the elastic sealing ring is squeezed and deformed, and under the action of the support ring tightening the elastic sealing ring, the elastic sealing ring can be pressed against the clamping mechanism, and the elastic sealing ring can also tighten the electrolysis unit, so that the electrolysis structure forms a tight structure, ensuring that the electrolysis structure can have sufficient sealing performance, making it difficult for high-pressure hydrogen to leak, and making the electrolysis structure more stable.

[0034] Furthermore, since the membrane electrode is clamped between the first drainage ring and the second drainage ring, and 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, then there will be a gap between the areas of the first drainage ring and the second drainage ring close to the outer circle, so that when the clamping mechanism clamps the electrolysis structure, the inner periphery of the elastic sealing ring will squeeze into the gap between the areas of the first drainage ring and the second drainage ring close to the outer circle, which can strengthen the sealing between the first drainage ring and the second drainage ring and further prevent the leakage of high-pressure hydrogen.

[0035] In addition, since the titanium sheet has a high flatness, after the titanium sheet is attached to the side of the membrane electrode, it can be tightly attached to the side of the membrane electrode, thereby providing good support for the membrane electrode and ensuring the stability of the electrolysis structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a three-dimensional diagram of an electrolytic structure according to an embodiment of the present invention;

[0037] Figure 2 is another three-dimensional diagram of the electrolytic structure of an embodiment of the present invention;

[0038] Figure 3 is an exploded view of the electrolytic structure of an embodiment of the present invention;

[0039] Figure 4 is another exploded view of the electrolytic structure of an embodiment of the present invention;

[0040] Figure 5 is a stereoscopic diagram of a first drainage ring according to an embodiment of the present invention;

[0041] Figure 6 yes Figure 5 A in the enlarged view;

[0042] Figure 7 is a stereoscopic diagram of a second drainage ring according to an embodiment of the present invention;

[0043] Figure 8 yes Figure 7 The enlarged view of point B in the figure;

[0044] Fig. 9 yes Figure 7 The enlarged view of point C in the figure;

[0045] Fig.10 is a three-dimensional diagram of a hydrogen production device according to an embodiment of the present invention;

[0046] Fig.11 is a side view of a hydrogen production device according to an embodiment of the present invention;

[0047] Fig.12 is a cross-sectional view of an electrolytic structure according to an embodiment of the present invention;

[0048] Fig.13 yes Fig.12 Enlarged view of point D 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 slot; 132. First sealing slot; 14. Second drainage ring; 141. Water inlet slot; 142. Water return slot; 143. Second sealing slot; 15. Middle 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 pad;

[0052] 3. Clamping mechanism; 31. Positive electrode pressure plate; 32. Negative electrode pressure plate; 33. Positive electrode plate; 34. Negative electrode plate; 35. Adjustment assembly; 351. Bolt; 352. Nut. DETAILED DESCRIPTION

[0053] The specific implementation of the present invention is further described in detail below in conjunction with 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.

[0054] In the description of the present invention, it should be understood that the wording "comprising" used in the present specification refers to the presence of the features, integers, steps, operations, parts / components and / or assemblies, but does not exclude the presence or addition of one or more other features, integers, steps, operations, parts / components, assemblies and / or their groups. It should be understood that when we say a part / component is "connected" to another part / component, it can be directly connected to the other part / component, or there can be intermediate parts / components. The wording "and / or" used here includes all or any unit and all combinations of one or more associated listed items.

[0055] like Figures 1 to 13 As shown, the present invention relates to an electrolysis structure, which utilizes PEM water electrolysis hydrogen production technology to produce high-pressure hydrogen. The electrolysis structure includes an electrolysis unit 1 and an external sealing component 2.

[0056] 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 diameters of the first drainage ring 13 and the second drainage ring 14 are both larger than the outer diameters 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 is provided with a hydrogen outlet channel 100 connected to one side of the membrane electrode 11. The second drainage ring 14 is provided with a water inlet channel 200 and a water return channel 300 both connected to the other side of the membrane electrode 11. Two titanium sheets 12 are provided, and the two titanium sheets 12 are correspondingly attached to the two sides of the membrane electrode 11.

[0057] The outer sealing assembly 2 includes a support ring 21 and an elastic sealing ring 22. The support ring 21 is sleeved on the outer periphery of the elastic sealing ring 22, and the elastic sealing ring 22 is sleeved on the outer periphery of the electrolysis unit 1. 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. Both sides of the elastic sealing ring 22 in the axial direction are planes, and the cross-section of the elastic sealing ring 22 is rectangular.

[0058] In the present invention, when the electrolysis unit 1 is working, one of the titanium sheets 12 serves as an anode and the other titanium sheet 12 serves as a cathode. Water flows into the titanium sheet 12 serving as an 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 sheet 12 serving as a 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. 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 sleeves 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 thickness of the elastic sealing ring 22 in the axial direction is greater than the thickness of the support ring 21 in the axial direction, and is also greater than the thickness of the electrolysis unit 1 in the axial direction. Moreover, both sides of the elastic sealing ring 22 in the axial direction are planes, 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 squeezed and deformed, and under the action of the support ring 21 clamping the elastic sealing ring 22, the elastic sealing ring 22 can be pressed against the clamping mechanism 3, and the elastic sealing ring 22 can also clamp the electrolysis unit 1, so that the electrolysis structure forms a tight structure, ensuring that the electrolysis structure can have sufficient sealing performance, making it difficult for high-pressure hydrogen to leak, and making the electrolysis structure more stable.

[0059] 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, and 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. Therefore, 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.

[0060] 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 fit tightly 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.

[0061] In this embodiment, the outer sealing component 2 further includes a supporting sealing gasket 23 , and the supporting ring 21 is a stainless steel supporting ring 21 , and the supporting sealing gaskets 23 are attached to both sides of the supporting ring 21 in the axial direction.

[0062] Specifically, the support seal 23 is made of Teflon. On the one hand, the support seal 23 is attached to both sides of the support ring 21, so that after the clamping mechanism 3 clamps the electrolytic structure, the support seal 23 is tightly attached to the clamping mechanism 3, which can further improve the sealing effect. Therefore, the electrolytic structure is tightly attached to the clamping mechanism 3 through the elastic seal 22, and is tightly attached to the clamping mechanism 3 through the support seal 23, so that a double sealing effect is achieved, and the sealing of the electrolytic structure is ensured. On the second hand, since the support ring 21 is made of stainless steel, the elastic seal 22 is clamped with sufficient strength, and then the support seal 23 is attached to both sides of the stainless steel support ring 21, so that the flatness requirements of the planes on both sides of the support ring 21 do not need to be too high, and the sealing can be ensured, and the processing difficulty and processing accuracy of the support ring 21 can be reduced. On the third hand, Teflon has high chemical stability and can withstand high temperatures, so that the support seal 23 can have a long service life and high practicality.

[0063] In this embodiment, when the elastic sealing ring 22 is squeezed by the axial force, the inner periphery of the elastic sealing ring 22 is tightly sleeved around the outer peripheries of the first drainage ring 13 and the second drainage ring 14, and 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 enhancing the sealing between the first drainage ring 13 and the second drainage ring 14.

[0064] 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.

[0065] In this embodiment, the electrolysis unit 1 also 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.

[0066] The middle sealing ring 15 is sandwiched between the first drain ring 13 and the second drain ring 14. The middle sealing ring 15 is made of Teflon. Since Teflon has high chemical stability and high temperature resistance, the sealing between the first drain ring 13 and the second drain ring 14 can be ensured, and the life of the electrolysis structure is longer. Then, the edge of the membrane electrode 11 is sandwiched between the first drain ring 13 and the middle sealing ring 15, or the edge of the membrane electrode 11 is sandwiched between the second drain ring 14 and the middle sealing ring 15, so that the membrane electrode 11 blocks the inner rings of the first drain ring 13 and the second drain ring 14, so as to limit water from passing through the inner ring of the second drain ring 14 to the inner ring of the first drain ring 13, and only allow hydrogen ions to pass through the membrane electrode 11 to the titanium sheet 12 as the cathode.

[0067] Preferably, the electrolysis unit 1 further comprises 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.

[0068] The first drainage ring 13 and the second drainage ring 14 are both provided with the end sealing ring 16 on both sides facing away from each other. The end sealing ring 16 is made of Teflon. Since Teflon has high chemical stability and high temperature resistance, after the clamping mechanism 3 clamps the electrolytic structure, the sealing between the electrolytic structure and the clamping mechanism 3 can be ensured, and the service life of the electrolytic structure is longer. Moreover, when one of the end sealing rings 16 is attached to the side of the first drainage ring 13 facing away from the second drainage ring 14, the end sealing ring 16 can also cover the hydrogen outlet groove 131 of the first drainage ring 13 and seal the hydrogen outlet groove 131. When the other end sealing ring 16 is attached to the side of the second drainage ring 14 facing away from the first drainage ring 13, the end sealing ring 16 can also cover the water inlet groove 141 and the water return groove 142 of the second drainage ring 14 and seal the water inlet groove 141 and the water return groove 142.

[0069] In this embodiment, the first drainage ring 13 is provided with first sealing grooves 132 along the circumferential direction on both sides in the axial direction, and the second drainage ring 14 is provided with second sealing grooves 143 along the circumferential direction on both sides in the axial direction. 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.

[0070] 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 are 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.

[0071] In this embodiment, the first guide ring 13 is provided with a hydrogen outlet 101 in the axial direction, and the first guide ring 13 is provided with a hydrogen outlet groove 131 on the side 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 circle of the first guide ring 13, and the hydrogen outlet 101 and the hydrogen outlet groove 131 form the hydrogen outlet channel 100.

[0072] The second drainage ring 14 is axially provided with a water inlet 201 and a water return port 301, and the second drainage ring 14 is provided with a water inlet groove 141 and a water return groove 142 on the side facing away from the first drainage ring 13, one end of the water inlet groove 141 is connected with 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 water return groove 142 is connected with the water return port 301, and the other end of the water return 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 water return port 301 and the water return groove 142 form the water return channel 300.

[0073] 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, and the multiple water inlets 201 are connected together, the multiple water return ports 301 are connected together, and the 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, it is convenient to set up multiple electrolysis structures later, and the multiple electrolysis structures are stacked together along the axial direction. After water is injected into the outermost water inlet 201, the water can flow into the multiple electrolysis structures along the multiple water inlets 201, and because the middle sealing ring 15 and the end sealing ring According to the configuration of 16, water can only enter the inner circle of the second drainage ring 14 through the water inlet groove 141, and after electrolysis, water enters the multiple water return ports 301 through the water return groove 142, and 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, which facilitates the simultaneous water supply, water recovery and hydrogen collection of the multiple electrolysis structures, and can facilitate users to stack the electrolysis structures as needed, with high practicality.

[0074] Moreover, the water inlet, water return and hydrogen collection of the electrolysis structure are all carried out on the axial side of the electrolysis structure, so it will not affect the sealing of the outer sealing component 2, nor will it affect the sealing of the middle sealing ring 15 and the end sealing ring 16, thereby ensuring the sealing of the electrolysis structure when in use.

[0075] 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 groove 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 of the membrane electrode 11 close to the second drainage ring 14.

[0076] 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 to prevent 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 the titanium filter 17 is connected, water can be guided 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 as the anode, which is conducive 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 setting of the titanium filter 17 can help water to quickly cover the entire surface of the titanium sheet 12, and prevent the part of the titanium sheet 12 that is not wetted by water from overheating and eventually ablating the membrane electrode 11 or other components. At the same time, since 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 environment, which is conducive to improving the service life of the electrolysis structure.

[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 radially extends to the inner circle of the second drainage ring 14 .

[0078] There are multiple water inlet grooves 141, one end of each of the multiple 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 multiple 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 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 sheet 12 serving as the anode. Moreover, since the electrolysis structure is in 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 a high-pressure environment, thereby ensuring the stability of the electrolysis structure.

[0079] Preferably, the thickness of the second drainage ring 14 in the axial direction is T1 mm, and the depth of the water inlet groove 141 in the axial direction of the second drainage 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, 0.2≤D1 / T1≤0.7 is maintained to 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 S2 mm 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 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, 0.005≤S2 / S1≤0.03 is maintained to 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 radially extends 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 a high-pressure environment, thereby ensuring the stability of the electrolysis structure.

[0085] Preferably, the thickness of the second drainage ring 14 in the axial direction is T1 mm, and the depth of the water return groove 142 in the axial direction of 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 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 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, 0.2≤D2 / T1≤0.7 is maintained to 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 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 occupied by the return water groove 142 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 the structural strength of the second drainage ring 14 can be ensured, the efficiency of water exiting the titanium sheet 12 will be affected. Therefore, 0.005≤S3 / S1≤0.03 is maintained to 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 port 101 of the first guide ring 13 , and the other end of the plurality of hydrogen outlet grooves 131 radially extends 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 port 101 of the first guide ring 13, and the other end of each of the multiple hydrogen outlet grooves 131 extends radially to the inner circle of the first guide 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 port 101 through the multiple hydrogen outlet grooves 131; on the other hand, the multiple hydrogen outlet grooves 131 extend radially to the inner circle of the first guide ring 13, so that hydrogen can be collected faster. Moreover, since the inside 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 circle of the first guide ring 13 can maintain a sufficient distance from each other, and the structural strength of the first guide ring 13 is not easily affected by the setting of the multiple hydrogen outlet grooves 131, so that the first guide ring 13 can still maintain 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, 0.2≤D3 / T2≤0.7 is maintained to ensure the efficiency of the electrolysis structure in collecting hydrogen and to 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 S4 mm 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 , wherein 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 is occupied by the hydrogen outlet groove 131, the weaker the structural strength of the first drainage ring 13 will be. When S5 / S4 is larger, the more position of the first drainage ring 13 is occupied by the hydrogen outlet groove 131, which will affect the structural strength of the first drainage ring 13. When S5 / S4 is smaller, 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, 0.005≤S5 / S4≤0.05 is maintained to ensure the structural strength of the first drainage ring 13 and 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 titanium filter 17 at the second drainage ring 14, that is, the second drainage ring 14 will also be impacted by water. Moreover, the water inlet groove 141 and the return water groove 142 are provided on the second drainage ring 14, 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 size of the electrolysis structure in the axial direction 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 size of the electrolysis structure in the axial direction 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 relatively arranged.

[0097] Since the water in the water inlet 201 enters the inner circle of the second drainage ring 14 through the water inlet groove 141 of the second drainage ring 14, the water can enter the water return port 301 through the water return groove 142 of the second drainage ring 14 after passing through the titanium sheet 12, so the water inlet 201 and the water return port 301 of the second drainage ring 14 are evenly arranged along the circumference of the second drainage ring 14, so that the water can better and evenly wet the entire surface of the titanium sheet 12, which is conducive to improving the efficiency of electrolysis, and can also prevent 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 water return groove 142 away from the water return port 301 are arranged relative to each other, which is conducive to smoother entry and exit of water and ensures the amount of electrolyte.

[0098] In this embodiment, the first drainage ring 13 and the second drainage ring 14 are both made of ppsu.

[0099] 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.

[0100] The present invention also relates to a hydrogen production device, comprising the electrolysis structure and the clamping mechanism 3, wherein the clamping mechanism 3 comprises a positive electrode pressure plate 31, a negative electrode pressure plate 32, a positive electrode plate 33, a negative electrode plate 34 and an adjusting component 35, wherein the positive electrode pressure plate 31 and the negative electrode pressure plate 32 are opposite to each other, the positive electrode plate 33 and the negative electrode plate 34 are correspondingly arranged on both sides of the positive electrode pressure plate 31 and the negative electrode pressure plate 32 opposite to each other, the electrolysis structure is clamped between the positive electrode plate 33 and the negative electrode plate 34, and the positive electrode plate 33 is attached to the titanium junction sheet 12 serving as the anode, and the negative plate 34 is attached to the titanium junction sheet 12 serving as the cathode. The positive plate 33 and the negative plate 34 are used to be electrically connected to an external power source. The adjustment component 35 is connected between the positive plate 31 and the negative plate 32 to adjust the distance between the positive plate 31 and the negative plate 32, so that the positive plate 31 and the negative plate 32 can clamp the electrolysis structure between the positive plate 33 and the negative plate 34.

[0101] The adjustment assembly 35 can be a combination of a bolt 351 and a nut 352, wherein the bolt 351 passes through the negative electrode pressure plate 32 and the positive electrode pressure plate 31 in sequence, and the nut 352 is threadedly connected to the bolt 351, and the nut 352 is 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.

[0102] Furthermore, the positive electrode pressure plate 31 and the positive electrode plate 33 are provided with a water inlet interface, a water return interface and a hydrogen outlet interface at positions corresponding to the water inlet 201, the water return port 301 and the hydrogen outlet 101 of the electrolysis unit 1, so as to facilitate the introduction of water into the electrolysis structure and the collection of hydrogen.

[0103] The hydrogen production device of the present invention adopts the electrolysis structure, and the electrolysis structure 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, so that when the positive electrode pressure plate 31 and the negative electrode pressure plate 32 of the clamping mechanism 3 jointly clamp the electrolysis structure, the elastic sealing ring 22 is squeezed and deformed, and under the action of the support ring 21 clamping the elastic sealing ring 22, the elastic sealing ring 22 can be pressed against the positive electrode plate 33 and the negative electrode plate 34 of the clamping mechanism 3, and the elastic sealing ring 22 can also clamp the electrolysis unit 1, so that the electrolysis structure forms a tight structure, ensuring that the electrolysis structure can have sufficient sealing performance, making it difficult for high-pressure hydrogen to leak, and making the electrolysis structure more stable.

[0104] 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. An electrolysis structure, characterized in that: include: An electrolysis unit, comprising a membrane electrode, a titanium sheet, a first drainage ring and a second drainage ring, wherein the first drainage ring, the membrane electrode and the second drainage ring are sequentially stacked together, 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; An outer sealing assembly comprises a support ring and an elastic sealing ring, wherein the support ring is sleeved on the outer periphery of the elastic sealing ring, and the elastic sealing ring is sleeved on the outer periphery of the electrolysis unit. The axial thickness of the elastic sealing ring is greater than both the axial thickness of the support ring and the axial thickness of the electrolysis unit, and both sides of the elastic sealing ring in the axial direction are planes.

2. The electrolysis structure according to claim 1, characterized in that: The outer sealing component also includes a supporting sealing pad. The supporting ring is a stainless steel supporting ring. The supporting sealing pads are attached to both sides of the supporting ring.

3. The electrolysis structure according to claim 1, characterized in that: When the elastic sealing ring is squeezed by the axial force, the inner periphery of the elastic sealing ring is tightly sleeved 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.

4. The electrolysis structure according to claim 1, characterized in that: The electrolysis unit also includes an intermediate sealing ring, which 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.

5. The electrolysis structure according to claim 4, characterized in that: The electrolysis unit further comprises an end sealing ring, and the end sealing ring is attached to both sides of the first drainage ring and the second drainage ring facing away from each other.

6. The electrolysis structure according to claim 5, characterized in that: A first sealing groove is opened on both sides of the first drainage ring along the circumferential direction, and a second sealing groove is opened on both sides of the second drainage ring along the circumferential direction. The corresponding parts on both sides of the middle sealing ring are pressed into the first sealing groove and the second sealing groove, and a part of one of the end sealing rings is pressed into the first sealing groove, and a part of the other end sealing ring is pressed into the second sealing groove.

7. The electrolysis structure according to claim 5, characterized in that: The middle sealing ring and the end sealing rings are both made of Teflon.

8. The electrolysis structure 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 axially provided with a water inlet and a water return port, and the second drainage ring is provided with a water inlet groove and a water return groove on the side 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 circle of the second drainage ring, one end of the water return groove is connected with the water return port, and the other end of the water return groove passes through the inner circle 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 water return groove form the water return channel.

9. The electrolysis structure according to claim 8, characterized in that: The electrolysis unit also includes a titanium filter, which is located in the inner circle of the second drainage ring, the outer circle of the titanium filter is close to the inner circle of the second drainage ring, and the end of the water inlet trough away from the water inlet is opposite to the outer circle 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.

10. The electrolysis structure according to claim 8, 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 circle of the second drainage ring.

11. The electrolysis structure according to claim 10, 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.

12. The electrolytic structure according to claim 8, characterized in that: A plurality of return water grooves are provided on a 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 circle of the second drainage ring.

13. The electrolysis structure according to claim 12, characterized in that: 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; 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.

14. The electrolysis structure according to claim 8, 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.

15. The electrolysis structure according to claim 14, 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.

16. The electrolysis structure according to claim 8, characterized in that: The water inlet and the water return port of the second drainage ring are evenly distributed along the circumference of the second drainage ring, and one end of the water inlet groove away from the water inlet and one end of the water return groove away from the water return port are arranged opposite to each other.

17. The electrolytic structure according to claim 1, characterized in that: The first drainage ring and the second drainage ring are both made of ppsu.

18. A hydrogen production device, characterized in that: The invention comprises the electrolysis structure as described in any one of claims 1 to 17.

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