Methanol fuel cell vaporizing chamber sealing structure and use method thereof

Abstract

The invention discloses a methanol fuel cell vaporizing chamber sealing structure and a use method thereof.The methanol fuel cell vaporizing chamber sealing structure comprises a lower cover plate, an upper cover plate and a cover plate fixing mechanism connecting the lower cover plate and the upper cover plate, a vaporizing cavity is formed in the interior after the lower cover plate and the upper cover plate are connected, and heating holes are formed in the two corresponding side walls of the lower cover plate and the upper cover plate at equal intervals; a heating hole is formed in the upper cover plate and communicated with the interior of the vaporization cavity, an electric heating rod is arranged in the heating hole in a matched mode, a frame-shaped protruding plate is integrally arranged at the bottom of the upper cover plate, a frame-shaped groove is formed in the top of the lower cover plate, and the frame-shaped protruding plate is connected into the frame-shaped groove in a matched mode. The sealing plates are arranged in a matched manner, so that a high sealing effect can be achieved, the situation that multiple bolts are connected in the past, time and labor are wasted, and the sealing performance is poor is avoided, the U-shaped flow channel formed by the snake-shaped partition plates is adopted, the flowing path of a methanol aqueous solution can be prolonged, and the reaction efficiency of the fuel cell is improved.

Description

Technical Field

[0001] This invention relates to the field of methanol fuel cell technology, specifically to a sealing structure for the vaporization chamber of a methanol fuel cell and its usage method. Background Technology

[0002] Methanol fuel cells, as a highly efficient and clean energy conversion device, have shown broad application prospects in portable power supplies, electric vehicles, and distributed power generation in recent years. Their working principle involves converting a mixture of methanol and water (methanol-water solution) into electrical energy through an electrochemical reaction, while simultaneously producing water and a small amount of carbon dioxide. In a methanol fuel cell system, the vaporization chamber is one of the key components; its main function is to heat and vaporize the liquid methanol-water solution to form gaseous reactants, which can then enter the fuel cell stack to participate in the reaction.

[0003] In current methanol fuel cell reforming hydrogen production processes, methanol and water need to be heated and vaporized, then reformed to complete the hydrogen production process. This entire process is endothermic, with an optimal reaction temperature of around 250 degrees Celsius. Current heating methods primarily involve generating high-temperature gas through fuel combustion, which then heats the vaporization and reforming chambers. However, because the gas carries relatively little heat, the temperature difference between locations far from and near the heat source is significant, easily leading to uneven heating in the reforming chamber, reducing hydrogen production efficiency, and resulting in long restart times (currently typically 20 minutes to 1 hour). Alternatively, some systems use a combustion flame to directly heat the vaporization and reforming chambers. However, the high flame temperature can easily cause ablation in the vaporization and reforming chambers, and temperature control is more difficult, further contributing to uneven heating. Other reforming hydrogen production systems employ combustion-heated furnaces or electric furnaces, but these have shorter lifespans and lower efficiency.

[0004] According to the vaporization chamber sealing structure of a methanol fuel cell disclosed in patent number CN 106784914 B, multiple bolt holes are evenly spaced around the surface of the upper cover plate, and the upper and lower cover plates are fixed together with fixing bolts. However, after the upper and lower cover plates are connected, the gaps between the multiple bolt holes on the surface of the upper cover plate and the inner wall of the bolt holes can easily lead to poor sealing effect inside the vaporization chamber, affecting the vaporization effect. Moreover, the connection and disassembly of the upper and lower cover plates by multiple fixing bolts is very troublesome and inconvenient to use. Therefore, we propose a vaporization chamber sealing structure for a methanol fuel cell and its usage method. Summary of the Invention

[0005] The purpose of this invention is to provide a sealing structure for the vaporization chamber of a methanol fuel cell and its usage method, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sealing structure for the vaporization chamber of a methanol fuel cell, comprising a lower cover plate, an upper cover plate, and a cover plate fixing mechanism connecting the lower cover plate and the upper cover plate. The interior of the lower cover plate and the upper cover plate after connection forms a vaporization cavity. Heating holes are equidistantly opened on the corresponding side walls of the lower cover plate and the heating holes communicate with the interior of the vaporization cavity. An electric heating rod is fitted inside each heating hole. A frame-shaped protrusion is integrally provided at the bottom of the upper cover plate. A frame-shaped groove is opened at the top of the lower cover plate, and the frame-shaped protrusion is fitted into the frame-shaped groove. A sealing plate is provided at the bottom of the lower cover plate, and the frame-shaped protrusion penetrates the sealing plate. A partition plate is fixedly connected inside the lower cover plate, and the partition plate has an overall serpentine structure.

[0007] Preferably, a U-shaped flow channel is formed inside the lower cover plate by a partition plate, and a methanol-water inlet pipe is connected to one end of the lower cover plate at the partition plate. A gas outlet is opened at the bottom of the lower cover plate at one end of the partition plate.

[0008] Preferably, the bottom of the frame-shaped protrusion is integrally provided with a locking block at equal intervals, the bottom of the inner wall of the frame-shaped groove is provided with a locking groove at equal intervals, the locking block is engaged in the locking groove, a fixing block is integrally provided between two adjacent locking grooves inside the frame-shaped groove, a fixing groove is provided between two adjacent locking blocks at the bottom of the frame-shaped protrusion, and the fixing block is engaged in the fixing groove.

[0009] Preferably, the cover plate fixing mechanism includes a U-shaped fixing plate, a sliding plate, and a fixing rod. The corresponding two side walls of the lower cover plate are fixedly connected to the U-shaped fixing plate, and the sliding plate is slidably connected inside the U-shaped fixing plate. A sliding rod is fixedly connected to the middle of the side of the sliding plate away from the lower cover plate, and the end of the sliding rod slides through the U-shaped fixing plate. A pull plate is provided at the end of the sliding rod located outside the U-shaped fixing plate. A second spring is sleeved on the outside of the sliding rod between the sliding plate and the U-shaped fixing plate. The sliding plate is fixedly connected to the fixing rod at equal intervals on one side of the lower cover plate, and the end of the fixing rod slides through the lower cover plate and extends into the frame groove. The corresponding two side walls of the upper cover plate are provided with fixing holes, and the fixing rod is engaged in the fixing holes.

[0010] Preferably, the corresponding two side walls of the lower cover plate are symmetrically fixed with fixing rods, and the fixing rods of the side walls of the lower cover plate are located inside the U-shaped fixing plate. The two ends of the slide plate are symmetrically provided with sliding holes, and the two fixing rods are respectively slidably connected in the sliding holes at both ends of the slide plate. A first spring is sleeved on the outside of the fixing rod between the slide plate and the U-shaped fixing plate.

[0011] Preferably, a methanol-water inlet hole is provided on the outer side of the lower cover plate, and a mounting plate is connected to the methanol-water inlet pipe on the outer side of one end of the lower cover plate. The end of the methanol-water inlet pipe extends into the methanol-water inlet hole. Mounting holes are symmetrically provided on the surface of the lower cover plate on the outer side of the methanol-water inlet hole. The mounting plate and the lower cover plate are fixed together by screws, and a sealing gasket is provided on one side of the mounting plate on the lower cover plate.

[0012] Preferably, the surface of the separator plate is provided with micropores at equal intervals.

[0013] Preferably, the methanol-water inlet and the gas outlet are located in the areas formed by the two sides of the partition plate and the inner wall of the lower cover plate, respectively.

[0014] The method of using a methanol fuel cell vaporization chamber sealing structure according to any one of the above includes the following steps:

[0015] Step 1: Insert the end of the methanol-water inlet pipe into the methanol-water inlet hole, and fix the mounting plate at the end of the methanol-water inlet pipe to the lower cover plate with fixing bolts.

[0016] Step 2: Pull the pull plates on both sides of the lower cover plate to move the slide plate toward the U-shaped fixing plate. The first and second springs are compressed. Then, the frame-shaped protrusion at the bottom of the upper cover plate is inserted into the frame-shaped groove. During the connection between the frame-shaped protrusion and the frame-shaped groove, the locking block at the bottom of the frame-shaped protrusion is inserted into the locking slot of the frame-shaped groove, and the fixing block in the frame-shaped groove is locked into the fixing slot on the frame-shaped protrusion. Release the pull plate. Under the action of the first and second springs, the slide plate slides to the lower cover plate. The fixing rod on the slide plate is inserted into the fixing hole on the locking block, so that the upper cover plate and the lower cover plate are tightly connected.

[0017] Step 3: Liquid methanol-water solution enters the vaporization cavity through the methanol-water inlet pipe. An electric heating rod is inserted into the heating hole. After being energized, it generates heat to directly heat the methanol-water solution in the vaporization cavity. The methanol-water solution flows through a U-shaped channel formed by a partition plate. Due to the serpentine structure of the partition plate, the flow path of the methanol-water solution in the channel is extended. The surface of the partition plate has micropores, which can promote uniform heating of the methanol-water solution during the flow and enhance the gas-liquid mixing effect. The methanol-water solution gradually heats up as it flows through the U-shaped channel and eventually completely vaporizes in the vaporization cavity to form a methanol-water vapor mixture. The vaporized methanol-water vapor mixture is discharged through the gas outlet and transported to the fuel cell stack for subsequent electrochemical reactions.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. In this invention, after the upper cover plate and the lower cover plate are connected, the frame-shaped protrusion at the bottom of the upper cover plate is engaged with the frame-shaped groove on the lower cover plate, the locking block on the frame-shaped protrusion is engaged with the locking groove in the frame-shaped groove, and the fixing block in the frame-shaped groove is engaged with the fixing groove on the frame-shaped protrusion. At the same time, through the cooperative arrangement of the first spring, the second spring, the sliding plate, the U-shaped fixing plate and the fixing rod, multiple fixing rods are quickly engaged with the fixing holes on the multiple locking blocks, so that the upper cover plate and the lower cover plate can be quickly and tightly connected. The cooperative arrangement of the sealing plate can achieve a high sealing effect, avoiding the time-consuming and laborious and poor sealing performance of the previous multiple bolt connection.

[0020] 2. This invention uses a U-shaped flow channel composed of a serpentine partition plate, which can extend the flow path of the methanol aqueous solution, allowing it to be fully heated. The electric heating rods are evenly distributed, and the microporous design on the serpentine partition plate can enhance the heat exchange efficiency, ensure the complete vaporization of the methanol aqueous solution, and improve the reaction efficiency of the fuel cell. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the upper cover plate and the lower cover plate after they have been unfolded according to the present invention;

[0022] Figure 2 This is a schematic diagram of the cover plate fixing mechanism of the present invention;

[0023] Figure 3 This is a schematic diagram of the lower cover plate structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure after the upper cover plate and the lower cover plate of the present invention are connected.

[0025] In the diagram: 1. Lower cover plate; 2. Upper cover plate; 3. Methanol-water inlet pipe; 4. Divider plate; 5. Frame-shaped protrusion plate; 6. Frame-shaped groove; 7. Locking block; 8. Locking groove; 9. Fixing block; 10. Fixing groove; 11. Sealing plate; 12. Heating hole; 13. Electric heating rod; 14. Gas outlet; 15. Fixing rod; 16. U-shaped fixing plate; 17. First spring; 18. Slide plate; 19. Slide rod; 20. Second spring; 21. Pull plate; 22. Methanol-water inlet hole; 23. Mounting plate; 24. Mounting hole; 25. Sealing gasket; 26. Micropore; 27. Fixing rod; 28. Fixing hole; 29. ​​Cover plate fixing mechanism; 30. Vaporization cavity. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1 , Figure 3 and Figure 4 The present invention provides a technical solution: a sealing structure for the vaporization chamber of a methanol fuel cell, including a lower cover plate 1, an upper cover plate 2, and a cover plate fixing mechanism 29 connecting the lower cover plate 1 and the upper cover plate 2. The interior of the lower cover plate 1 and the upper cover plate 2 after connection forms a vaporization cavity 30. Heating holes 12 are equally spaced on the corresponding side walls of the lower cover plate 1 and the upper cover plate 2, and the heating holes 12 are connected to the interior of the vaporization cavity 30. An electric heating rod 13 is provided in the heating hole 12.

[0028] It should be noted that the electric heating rod 13 is inserted into the heating hole 12 and generates heat after being energized, which can directly heat the methanol aqueous solution in the vaporization cavity 30. The electric heating rods 13 on the upper cover plate 2 and the lower cover plate 1 are evenly distributed, which can achieve uniform electric heating, ensure that the methanol aqueous solution is completely vaporized, and improve the reaction efficiency of the fuel cell.

[0029] The bottom of the upper cover plate 2 is integrally provided with a frame-shaped protrusion plate 5, and the top of the lower cover plate 1 is provided with a frame-shaped groove 6. The frame-shaped protrusion plate 5 is connected in the frame-shaped groove 6. The bottom of the lower cover plate 1 is provided with a sealing plate 11, and the frame-shaped protrusion plate 5 passes through the sealing plate 11. A partition plate 4 is fixedly connected inside the lower cover plate 1, and the partition plate 4 has an overall serpentine structure.

[0030] It should be noted that the inner walls of the upper cover plate 2 and the lower cover plate 1 corresponding to the partition plate 4 can be designed in a serpentine structure, so that the methanol-water flows in the serpentine channel. The flow path of the methanol-water solution in the flow channel is extended, which can ensure that it is fully heated and improve the vaporization efficiency.

[0031] Please see Figure 3 The lower cover plate 1 is divided into a U-shaped flow channel by a partition plate 4. The lower cover plate 1 is connected to a methanol-water inlet pipe 3 at one end of the partition plate 4, and a gas outlet 14 is opened at the bottom of the lower cover plate 1 at one end of the partition plate 4.

[0032] It should be noted that methanol-water can be introduced into the vaporization cavity 30 through the methanol-water inlet pipe 3, flowing into the U-shaped flow channel formed by the serpentine partition plate 4 in the lower cover plate 1. The methanol-water inlet pipe 3 is located at one end of the U-shaped flow channel, while the gas outlet 14 is located at the other end of the U-shaped flow channel, so that the methanol-water is completely vaporized inside the vaporization cavity 30. The vaporized methanol-water vapor mixture is discharged through the gas outlet 14 and transported to the fuel cell stack for subsequent electrochemical reactions.

[0033] The bottom of the frame-shaped protruding plate 5 is integrally provided with a locking block 7 at equal intervals. The bottom of the inner wall of the frame-shaped groove 6 is provided with a locking groove 8 at equal intervals. The locking block 7 is locked in the locking groove 8. A fixing block 9 is integrally provided between two adjacent locking grooves 8 inside the frame-shaped groove 6. A fixing groove 10 is provided between two adjacent locking blocks 7 at the bottom of the frame-shaped protruding plate 5. The fixing block 9 is locked in the fixing groove 10.

[0034] It should be noted that when the upper cover plate 2 is connected to the lower cover plate 1, the frame-shaped protrusion 5 at the bottom of the upper cover plate 2 is inserted into the frame-shaped groove 6. During the connection process between the frame-shaped protrusion 5 and the frame-shaped groove 6, the locking block 7 at the bottom of the frame-shaped protrusion 5 is inserted into the locking groove 8 of the frame-shaped groove 6, and the fixing block 9 in the frame-shaped groove 6 is locked into the fixing groove 10 on the frame-shaped protrusion 5, so that the connection between the two forms an interlocking shape, making the connection tighter and effectively preventing gas leakage.

[0035] Please see Figure 1 and Figure 2 The cover plate fixing mechanism 29 includes a U-shaped fixing plate 16, a sliding plate 18, and a fixing rod 27. The corresponding two side walls of the lower cover plate 1 are fixedly connected to the U-shaped fixing plate 16, and the sliding plate 18 is slidably connected inside the U-shaped fixing plate 16. The middle part of the sliding plate 18 away from the lower cover plate 1 is fixedly connected to the sliding rod 19, and the end of the sliding rod 19 slides through the U-shaped fixing plate 16. A pull plate 21 is provided at one end of the sliding rod 19 outside the U-shaped fixing plate 16. A second spring 20 is sleeved on the outside of the sliding rod 19 between the sliding plate 18 and the U-shaped fixing plate 16. The sliding plate 18 is fixedly connected to the fixing rod 27 at equal intervals on one side of the lower cover plate 1, and the end of the fixing rod 27 slides through the lower cover plate 1 and extends into the frame groove 6. The surfaces of the corresponding two side walls of the upper cover plate 2 are provided with fixing holes 28, and the fixing rod 27 is engaged in the fixing holes 28.

[0036] It should be noted that when the upper cover plate 2 is connected to the lower cover plate 1, the pull plates 21 on both sides of the lower cover plate 1 are pulled to move the slide plate 18 toward the U-shaped fixing plate 16. The first spring 17 and the second spring 20 are compressed. After the upper cover plate 2 and the lower cover plate 1 are connected accordingly, the pull plates 21 are released. Under the action of the first spring 17 and the second spring 20, the slide plate 18 slides to the lower cover plate 1. The fixing rod 27 on the slide plate 18 is inserted into the fixing hole 28 on the card block 7, so that the upper cover plate 2 and the lower cover plate 1 are tightly connected. The upper cover plate 2 and the lower cover plate 1 can be quickly connected without drilling bolt holes on the upper cover plate 2 and the lower cover plate 1, avoiding the possibility of gas leakage.

[0037] Please see Figure 2The corresponding two side walls of the lower cover plate 1 are symmetrically fixed with fixing rods 15, and the fixing rods 15 on the side walls of the lower cover plate 1 are located inside the U-shaped fixing plate 16. The two ends of the slide plate 18 are symmetrically provided with sliding holes, and the two fixing rods 15 are respectively slidably connected in the sliding holes at both ends of the slide plate 18. The outer side of the fixing rods 15 is provided with a first spring 17 between the slide plate 18 and the U-shaped fixing plate 16.

[0038] It should be noted that the setting of the fixing rod 15 ensures the stable sliding of the slide plate 18 inside the U-shaped fixing plate 16 and ensures that the fixing rod 27 can be connected to the fixing hole 28 on the card block 7.

[0039] See also Figure 2 A methanol-water inlet hole 22 is provided on the outer side of the lower cover plate 1. A methanol-water inlet pipe 3 is located on the outer side of one end of the lower cover plate 1 and is connected to a mounting plate 23. The end of the methanol-water inlet pipe 3 extends into the methanol-water inlet hole 22. Mounting holes 24 are symmetrically provided on the surface of the lower cover plate 1 on the outer side of the methanol-water inlet hole 22. The mounting plate 23 and the lower cover plate 1 are fixed together by screws. A sealing gasket 25 is provided on one side of the mounting plate 23 on the lower cover plate 1.

[0040] It should be noted that the methanol-water inlet pipe 3 and the methanol-water inlet hole 22 of the lower cover plate 1 are precisely fitted together by insertion, which can ensure smooth connection of the liquid channel and avoid flow resistance. A special sealing gasket 25 is set between the mounting plate 23 and the lower cover plate 1 to form the first line of sealing. The precise fit between the methanol-water inlet pipe 3 and the methanol-water inlet hole 22 forms the second seal, which effectively prevents liquid leakage.

[0041] See also Figure 2 The surface of the partition plate 4 is provided with micropores 26 at equal intervals.

[0042] It should be noted that the micropores 26 on the surface of the separator plate 4 can promote uniform heating of the methanol aqueous solution during the flow process and enhance the gas-liquid mixing effect.

[0043] See also Figure 3 The methanol-water inlet 22 and the gas outlet 14 are located on both sides of the partition plate 4 and in the area formed by the inner wall of the lower cover plate 1.

[0044] It should be noted that the methanol-water inlet 22 and the gas outlet 14 are located on both sides of the serpentine partition plate 4, which allows the methanol-water entering the vaporization cavity 30 to form along the U-shaped flow channel. The inner wall of the U-shaped flow channel is a serpentine channel, which can increase the liquid travel path and greatly improve the vaporization efficiency.

[0045] A method for using a methanol fuel cell vaporization chamber sealing structure according to any of the above includes the following steps:

[0046] Step 1: Insert the end of the methanol-water inlet pipe 3 into the methanol-water inlet hole 22, and fix the mounting plate 23 at the end of the methanol-water inlet pipe 3 to the lower cover plate 1 with fixing bolts.

[0047] Step 2: Pull the pull plates 21 on both sides of the lower cover plate 1 to move the slide plate 18 toward the U-shaped fixing plate 16. The first spring 17 and the second spring 20 are compressed. Then, the frame-shaped protrusion 5 at the bottom of the upper cover plate 2 is inserted into the frame-shaped groove 6. During the connection between the frame-shaped protrusion 5 and the frame-shaped groove 6, the locking block 7 at the bottom of the frame-shaped protrusion 5 is inserted into the locking slot 8 of the frame-shaped groove 6, and the fixing block 9 in the frame-shaped groove 6 is locked into the fixing slot 10 on the frame-shaped protrusion 5. Release the pull plate 21. Under the action of the first spring 17 and the second spring 20, the slide plate 18 slides down to the lower cover plate 1. The fixing rod 27 on the slide plate 18 is inserted into the fixing hole 28 on the locking block 7, so that the upper cover plate 2 and the lower cover plate 1 are tightly connected.

[0048] Step 3: Liquid methanol-water solution enters the vaporization cavity 30 through methanol-water inlet pipe 3. Electric heating rod 13 is inserted into heating hole 12. After being energized, it generates heat to directly heat the methanol-water solution in the vaporization cavity 30. It flows through the U-shaped flow channel formed by the partition plate 4. Because the partition plate 4 has a serpentine structure, the flow path of the methanol-water solution in the flow channel is extended. The surface of the partition plate 4 is provided with micropores 26, which can promote uniform heating of the methanol-water solution during the flow process and enhance the gas-liquid mixing effect. The methanol-water solution gradually heats up when flowing through the U-shaped flow channel and finally completely vaporizes in the vaporization cavity 30 to form a methanol-water vapor mixture. The vaporized methanol-water vapor mixture is discharged through gas outlet 14 and transported to the fuel cell stack for subsequent electrochemical reactions.

[0049] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for the vaporization chamber of a methanol fuel cell, characterized in that, The device includes a lower cover plate (1), an upper cover plate (2), and a cover plate fixing mechanism (29) connecting the lower cover plate (1) and the upper cover plate (2). The lower cover plate (1) and the upper cover plate (2) form a vaporization cavity (30) after being connected. Heating holes (12) are equidistantly provided on the corresponding side walls of the lower cover plate (1) and the upper cover plate (2), and the heating holes (12) are connected to the interior of the vaporization cavity (30). An electric heating device is provided in the heating hole (12). The heating rod (13) has a frame-shaped protrusion (5) integrally provided at the bottom of the upper cover plate (2), and a frame-shaped groove (6) is provided at the top of the lower cover plate (1). The frame-shaped protrusion (5) is connected in the frame-shaped groove (6). A sealing plate (11) is provided at the bottom of the lower cover plate (1). The frame-shaped protrusion (5) penetrates the sealing plate (11). A partition plate (4) is fixedly connected inside the lower cover plate (1), and the partition plate (4) has an overall serpentine structure.

2. The sealing structure of the vaporization chamber of a methanol fuel cell according to claim 1, characterized in that: The lower cover plate (1) is divided into a U-shaped flow channel by a partition plate (4). The lower cover plate (1) is connected to a methanol-water inlet pipe (3) at one end of the partition plate (4). A gas outlet (14) is opened at the bottom of the lower cover plate (1) at one end of the partition plate (4).

3. The sealing structure of the vaporization chamber of a methanol fuel cell according to claim 1, characterized in that: The bottom of the frame-shaped protrusion (5) is integrally provided with a locking block (7) at equal intervals. The bottom of the inner wall of the frame-shaped groove (6) is provided with a locking groove (8) at equal intervals. The locking block (7) is engaged in the locking groove (8). A fixing block (9) is integrally provided between two adjacent locking grooves (8) inside the frame-shaped groove (6). A fixing groove (10) is provided between two adjacent locking blocks (7) at the bottom of the frame-shaped protrusion (5). The fixing block (9) is engaged in the fixing groove (10).

4. The sealing structure of the vaporization chamber of a methanol fuel cell according to claim 3, characterized in that: The cover plate fixing mechanism (29) includes a U-shaped fixing plate (16), a sliding plate (18), and a fixing rod (27). The corresponding two side walls of the lower cover plate (1) are fixedly connected to the U-shaped fixing plate (16), and the sliding plate (18) is slidably connected inside the U-shaped fixing plate (16). A sliding rod (19) is fixedly connected to the middle of the side of the sliding plate (18) away from the lower cover plate (1), and the end of the sliding rod (19) slides through the U-shaped fixing plate (16). One end of the sliding rod (19) located outside the U-shaped fixing plate (16) is provided with… A pull plate (21) is provided. A second spring (20) is sleeved on the outside of the slide rod (19) between the slide plate (18) and the U-shaped fixing plate (16). The slide plate (18) is fixedly connected to a fixing rod (27) at equal intervals on one side of the lower cover plate (1). The end of the fixing rod (27) slides through the lower cover plate (1) and extends into the frame groove (6). The upper cover plate (2) has fixing holes (28) on the surface of the corresponding side wall blocks (7). The fixing rod (27) is engaged in the fixing hole (28).

5. The sealing structure of the vaporization chamber of a methanol fuel cell according to claim 4, characterized in that: The corresponding two side walls of the lower cover plate (1) are symmetrically fixed with fixing rods (15), and the fixing rods (15) on the side walls of the lower cover plate (1) are located inside the U-shaped fixing plate (16). The two ends of the slide plate (18) are symmetrically provided with sliding holes. The two fixing rods (15) are respectively slidably connected in the sliding holes at both ends of the slide plate (18). The outer side of the fixing rod (15) is fitted with a first spring (17) between the slide plate (18) and the U-shaped fixing plate (16).

6. The sealing structure of the vaporization chamber of a methanol fuel cell according to claim 1, characterized in that: The lower cover plate (1) has a methanol-water inlet hole (22) on its outer side. The methanol-water inlet pipe (3) is connected to an mounting plate (23) on the outer side of one end of the lower cover plate (1). The end of the methanol-water inlet pipe (3) extends into the methanol-water inlet hole (22). The surface of the lower cover plate (1) has symmetrical mounting holes (24) on the outer side of the methanol-water inlet hole (22). The mounting plate (23) and the lower cover plate (1) are fixed together by screws. A sealing gasket (25) is provided on one side of the mounting plate (23) of the lower cover plate (1).

7. The sealing structure of the vaporization chamber of a methanol fuel cell according to claim 1, characterized in that: The surface of the partition plate (4) is provided with micropores (26) at equal intervals.

8. The sealing structure of the vaporization chamber of a methanol fuel cell according to claim 6, characterized in that: The methanol-water inlet (22) and gas outlet (14) are located on both sides of the partition plate (4) and in the area formed by the inner wall of the lower cover plate (1).

9. A method of using the sealing structure of the vaporization chamber of a methanol fuel cell according to any one of claims 1-8, characterized in that, The steps include: Step 1: Insert the end of the methanol-water inlet pipe (3) into the methanol-water inlet hole (22), and fix the mounting plate (23) at the end of the methanol-water inlet pipe (3) to the lower cover plate (1) with fixing bolts. Step 2: Pull the pull plates (21) on both sides of the lower cover plate (1) to move the slide plate (18) toward the U-shaped fixing plate (16). The first spring (17) and the second spring (20) are compressed. Then, the frame-shaped protrusion (5) at the bottom of the upper cover plate (2) is inserted into the frame-shaped groove (6). During the connection between the frame-shaped protrusion (5) and the frame-shaped groove (6), the locking block (7) at the bottom of the frame-shaped protrusion (5) is inserted into the locking slot (8) of the frame-shaped groove (6), and the fixing block (9) in the frame-shaped groove (6) is locked into the fixing slot (10) on the frame-shaped protrusion (5). Release the pull plate (21). Under the action of the first spring (17) and the second spring (20), the slide plate (18) slides down to the lower cover plate (1). The fixing rod (27) on the slide plate (18) is inserted into the fixing hole (28) on the locking block (7), so that the upper cover plate (2) and the lower cover plate (1) are tightly connected. Step 3: Liquid methanol-water solution enters the vaporization cavity (30) through methanol-water inlet pipe (3). Electric heating rod (13) is inserted into heating hole (12). After being powered on, heat is generated to directly heat the methanol-water solution in the vaporization cavity (30). It travels through the U-shaped flow channel formed by the partition plate (4). Since the partition plate (4) has a serpentine structure, the flow path of the methanol-water solution in the flow channel is extended. The surface of the partition plate (4) is provided with micropores (26), which can promote the uniform heating of the methanol-water solution during the flow process and enhance the gas-liquid mixing effect. The methanol-water solution gradually heats up when flowing through the U-shaped flow channel and finally completely vaporizes in the vaporization cavity (30) to form a methanol-water vapor mixture. The vaporized methanol-water vapor mixture is discharged through the gas outlet (14) and transported to the fuel cell stack for subsequent electrochemical reactions.

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