Hydrogen fuel cell engine heat energy recovery device

Abstract

The invention belongs to the technical field of heat energy recovery, and discloses a hydrogen fuel cell engine heat energy recovery device which comprises an engine body, a main body shell is arranged at the top of the engine body, side face supporting shells are fixedly connected to the two sides of the main body shell correspondingly, and a heat conduction assembly is arranged in the main body shell; the same side of the pair of side surface support shells is fixedly connected with a heat dissipation assembly; the heat conduction assembly comprises a plurality of cooling liquid pipes movably connected to the top of the main body shell, through cooperation of the heat conduction assembly, the temperature difference power generation piece and other structures, heat dissipated by a fuel cell can be conveniently utilized for power generation, the heat dissipated by operation of the engine body is guided to the cooling liquid pipes through the first heat conduction plate, and the cooling liquid pipes are arranged in the cooling liquid pipes. Heat is absorbed through cooling liquid in a cooling liquid pipe, and then the cooling liquid is conveyed into a cooling liquid temporary storage box through a communicating pipeline and a liquid discharging pipeline on the two sides by a liquid conveying pump.

Description

Technical Field

[0001] The invention belongs to the technical field of heat recovery, and in particular is a heat recovery device for a hydrogen fuel cell engine. Background Art

[0002] A hydrogen fuel cell engine is a device that converts hydrogen and oxygen directly into electrical energy through an electrochemical reaction. Its working principle is based on the reverse reaction of water electrolysis, generating electrical energy to drive vehicles or other equipment. During the operation of a hydrogen fuel cell engine, a large amount of heat energy will be generated. If this heat energy is not utilized, it will not only waste energy, but may also cause the system to overheat, affecting the performance and life of the battery. Therefore, heat recovery is of great significance to improving the overall efficiency of the system, reducing energy consumption and environmental pollution.

[0003] When recovering the heat energy of the engine, in most cases, it is directly discharged outside the vehicle body to keep the temperature of the entire system stable. In some cases, the heat will be directed to heating, which will cause a waste of heat energy, a waste of energy, and also pollution to the environment. Therefore, a hydrogen fuel cell engine heat energy recovery device is proposed. Summary of the invention

[0004] In order to solve the problem of heat energy recovery waste mentioned in the above background technology, the present invention provides a heat energy recovery device for a hydrogen fuel cell engine.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a heat energy recovery device for a hydrogen fuel cell engine, comprising an engine body, a main body shell is arranged on the top of the engine body, side support shells are fixedly connected to both sides of the main body shell, a heat conduction component is arranged inside the main body shell, and a pair of side support shells are fixedly connected to the same side of a heat dissipation component; The heat-conducting component includes a plurality of coolant pipes movably connected to the top of the main shell, the top of the coolant pipes are linearly distributed and fixedly connected with connecting pipes, and the connecting pipes located in the middle are used to connect the plurality of coolant pipes.

[0006] Preferably, the heat conduction component also includes a drainage pipe fixedly connected to the connecting pipe, the end of the drainage pipe away from the connecting pipe is fixedly connected to a coolant temporary storage box, the side of the coolant temporary storage box is fixedly connected to a delivery pipe, the middle of the delivery pipe is fixedly connected to a return pipe, the middle of the return pipe is installed with an infusion pump, and a first heat conduction plate is provided at the bottom of the coolant pipe.

[0007] Preferably, the connecting pipes are distributed at both ends and the middle of the coolant pipe, and the drain pipe is arranged on the side of the connecting pipes at both ends of the coolant pipe close to the side support shell, and the end of the drain pipe away from the connecting pipe penetrates the side support shell and extends to the interior of the side support shell.

[0008] Preferably, the coolant temporary storage box is located on a side of the side support shell close to the main shell, a second heat conduction plate protruding outward is provided in the middle of the coolant temporary storage box, the delivery pipe penetrates the side support shell and extends to the outside of the side support shell, the delivery pipe is connected to a pair of coolant temporary storage boxes at the same time, and the end of the reflux pipe away from the delivery pipe is connected to the connecting pipe located in the middle of the coolant pipe.

[0009] Preferably, the infusion pump is located on the side of the main shell and fixedly connected to the main shell, the first heat conducting plate is located inside the main shell and fixedly connected to the main shell, the first heat conducting plate is in conflict with the engine body, and the first heat conducting plate is fixedly connected to the coolant pipe.

[0010] Preferably, the heat dissipation assembly comprises an air collecting duct fixedly connected to a pair of side support shells, a limiting box is provided on the side of the air collecting duct away from the side support shells, a first heat dissipation fin is provided inside the limiting box, and a guide protrusion is provided in the middle of the air collecting duct.

[0011] Preferably, the gas collecting pipe connects a pair of side supporting shells, the limit box is fixedly connected to the middle part of the delivery pipe, and the connection between the delivery pipe and the return pipe is enclosed inside the limit box, and the limit box is provided with an opening on the side away from the gas collecting pipe, the first heat dissipation fin is fixedly connected to the middle part of the delivery pipe, and the guide protrusion is in the shape of an upwardly contracted pointed angle.

[0012] Preferably, an air supply pipe is fixedly connected to the top of the air collecting pipe, an exhaust fan is fixedly installed inside the air supply pipe, the air supply pipe is externally connected to an exhaust channel connected to the outside of the vehicle body, the air supply pipe corresponds to the position of the guide protrusion, and the guide protrusion is retracted toward the air supply pipe.

[0013] Preferably, a thermoelectric power generation sheet and a second heat dissipation fin are installed inside the side support shell, and an exhaust opening is opened on the same side of a pair of side support shells. The thermoelectric power generation sheet is in conflict with the second heat dissipation fin, and the second heat dissipation fin is located on the side of the thermoelectric power generation sheet away from the coolant temporary storage box.

[0014] Preferably, the temperature difference power generation sheet is divided into a cold surface and a hot surface, wherein the cold surface is in contact with the second heat conduction plate on the coolant temporary storage box for absorbing heat, wherein the hot surface is in contact with the second heat dissipation fin for dissipating heat, and the exhaust opening is located on the side of the side support shell away from the air collecting pipe, and the exhaust opening is connected with the second heat dissipation fin and the air collecting pipe to form an air flow channel.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention facilitates the use of heat dissipation of the fuel cell to generate electricity by arranging the cooperation of structures such as the heat conduction component and the temperature difference power generation sheet. The heat dissipated by the operation of the engine body is guided to the coolant pipe by the first heat conduction plate, and then the heat is absorbed by the coolant inside the coolant pipe. The coolant is then transported to the coolant temporary storage box through the connecting pipes and the drainage pipes on both sides by the infusion pump. Part of the heat is conducted out of the coolant temporary storage box through the second heat conduction plate and absorbed by the temperature difference power generation sheet, thereby realizing the secondary utilization of environmentally friendly energy. The present invention facilitates the processing of residual heat from power generation by arranging a heat dissipation component and an air transmission pipe and other structures. By arranging the heat dissipation component, the second heat dissipation fin is connected to the first heat dissipation fin by the air collecting pipe and the limit box. Then, according to actual needs, the hot air is blown into the interior of the vehicle or the hot air inside the vehicle is blown out to the outside of the vehicle by controlling the reverse rotation of the exhaust fan, so as to maintain the stability of the temperature inside the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the heat recovery device of the present invention; Figure 2 It is a partial cross-sectional schematic diagram of the heat conducting component of the present invention; Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle; Figure 4 This is a schematic diagram of the main body of the first heat conducting plate of the present invention; Figure 5 It is a schematic cross-sectional view of the bottom of the heat conducting component of the present invention; Figure 6 It is a schematic diagram of the partial disassembly of the heat-conducting component of the present invention.

[0017] In the figure: 1. Engine body; 2. Main body shell; 3. Side support shell; 4. Heat conduction component; 41. Coolant pipe; 42. Connecting pipe; 43. Drain pipe; 44. Coolant temporary storage box; 45. Delivery pipe; 46. Return pipe; 47. Infusion pump; 48. First heat conduction plate; 5. Heat dissipation component; 51. Gas collecting pipe; 52. Limiting box; 53. First heat dissipation fin; 54. Guide protrusion; 6. Gas delivery pipe; 7. Exhaust fan; 8. Temperature difference power generation sheet; 9. Second heat dissipation fin. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figures 1 to 6 As shown, the present invention provides a heat recovery device for a hydrogen fuel cell engine, comprising an engine body 1, a main body shell 2 is arranged on the top of the engine body 1, side support shells 3 are fixedly connected to both sides of the main body shell 2, a heat conduction component 4 is arranged inside the main body shell 2, and a pair of side support shells 3 are fixedly connected to the same side of a heat dissipation component 5; Among them, the heat conduction component 4 includes a plurality of coolant pipes 41 movably connected to the top of the main shell 2, and the top of the coolant pipes 41 is linearly distributed and fixedly connected with connecting pipes 42. At the same time, the connecting pipe 42 located in the middle is used to connect the plurality of coolant pipes 41.

[0020] The above scheme is adopted: the heat emitted by the operation of the engine body is guided to the coolant pipe through the first heat conduction plate, and then the heat is absorbed by the coolant inside the coolant pipe, and then the coolant is transported to the coolant temporary storage box through the connecting pipes and the discharge pipes on both sides by the infusion pump. Inside the coolant temporary storage box, part of the heat is conducted out through the second heat conduction plate and absorbed by the temperature difference power generation sheet, and then the hot air is blown into the interior of the vehicle by controlling the rotation direction of the exhaust fan, or the hot air inside the vehicle is blown out to the outside of the vehicle body, so as to keep the temperature inside the vehicle body stable.

[0021] like Figures 2 to 6 As shown, the heat-conducting component 4 also includes a drainage pipe 43 fixedly connected to the connecting pipe 42, and one end of the drainage pipe 43 away from the connecting pipe 42 is fixedly connected to a cooling liquid temporary storage box 44, a delivery pipe 45 is fixedly connected to the side of the cooling liquid temporary storage box 44, a return pipe 46 is fixedly connected to the middle of the delivery pipe 45, an infusion pump 47 is installed in the middle of the return pipe 46, and a first heat-conducting plate 48 is arranged at the bottom of the cooling liquid pipe 41.

[0022] The above scheme is adopted: by setting up a heat-conducting component 4, the first heat-conducting plate 48 absorbs the heat dissipated by the operation of the engine body 1, and then the heat is guided to the coolant pipe 41, and the coolant inside the coolant pipe 41 absorbs the heat, and then the coolant is transported to the coolant temporary storage box 44 through the connecting pipes 42 and the discharge pipes 43 on both sides. After a part of the heat is absorbed inside the coolant temporary storage box 44, it is transported to the outside of the side support shell 3 through the transport pipe 45 for secondary heat dissipation through the first heat dissipation fins 53, and then transported back to the coolant pipe 41 through the reflux pipe 46 and the infusion pump 47.

[0023] like Figures 2 to 6 As shown, the coolant temporary storage box 44 is located on the side of the side support shell 3 close to the main shell 2, and a second heat conduction plate protruding outward is set in the middle of the coolant temporary storage box 44. The delivery pipe 45 penetrates the side support shell 3 and extends to the outside of the side support shell 3. The delivery pipe 45 is connected with a pair of coolant temporary storage boxes 44 at the same time. The end of the reflux pipe 46 away from the delivery pipe 45 is connected with the connecting pipe 42 located in the middle of the coolant pipe 41. The infusion pump 47 is located on the side of the main shell 2 and is fixedly connected to the main shell 2. The first heat conduction plate 48 is located inside the main shell 2 and is fixedly connected to the main shell 2. The first heat conduction plate 48 is in conflict with the engine body 1, and the first heat conduction plate 48 is fixedly connected to the coolant pipe 41.

[0024] The above solution is adopted: by providing the connecting pipes 42, the connecting pipes 42 located on both sides of the coolant pipe 41 are connected to the corresponding coolant pipe 41 separately, and the coolant pipe 41 is connected to the corresponding drain pipe 43 at the same time, so that the coolant inside the coolant pipe 41 can be easily discharged, and it is avoided that the coolant pipes 41 flow in the connecting pipes 42 when discharging the coolant, which affects the discharge efficiency; The coolant temporary storage box 44 is provided for storing and transporting the coolant. When the heat-containing coolant in the coolant pipe 41 enters the coolant temporary storage box 44, the coolant will be transported to the coolant pipe 41 through the delivery pipe 45 and the return pipe 46. At the same time, when the coolant passes through the coolant temporary storage box 44, the second heat conduction plate provided on the coolant temporary storage box 44 will extract part of the heat from the coolant, which will be absorbed by the temperature difference power generation sheet 8, thereby generating electricity using the temperature difference.

[0025] like Figure 2 and Figure 5As shown, the heat dissipation assembly 5 includes an air collecting pipe 51 fixedly connected to a pair of side support shells 3, a limiting box body 52 is provided on the side of the air collecting pipe 51 away from the side support shell 3, a first heat dissipation fin 53 is provided inside the limiting box body 52, a guide protrusion 54 is provided in the middle of the air collecting pipe 51, the air collecting pipe 51 connects the pair of side support shells 3, the limiting box body 52 is fixedly connected to the middle of the delivery pipe 45, and the connection between the delivery pipe 45 and the return pipe 46 is enclosed. Surrounded by the limit box body 52, the limit box body 52 has an opening on one side away from the air collecting pipe 51, the first heat dissipation fin 53 is fixedly connected to the middle part of the delivery pipe 45, the guide protrusion 54 is in an upward pointed shape, the top of the air collecting pipe 51 is fixedly connected to the air supply pipe 6, the exhaust fan 7 is fixedly installed inside the air supply pipe 6, the air supply pipe 6 is externally connected to an exhaust channel connected to the outside of the vehicle body, the air supply pipe 6 corresponds to the position of the guide protrusion 54, and the guide protrusion 54 is gathered toward the air supply pipe 6.

[0026] The above scheme is adopted: by setting the heat dissipation component 5, the side support shell 3 is connected by the air collecting pipe 51, the middle part of the delivery pipe 45 is limited and dissipated by the limit box 52 and the first heat dissipation fin 53, the first heat dissipation fin 53 dissipates the coolant inside the delivery pipe 45, and the guide protrusion 54 is set in the middle of the air collecting pipe 51, so that the air collecting pipe 51 can directly discharge the hot air guided from the inside of the side support shell 3 and the hot air generated from the first heat dissipation fin 53 to the outside of the vehicle body through the air delivery pipe 6; By providing a limit box body 52 and a first heat dissipating fin 53, the limit box body 52 surrounds and limits the first heat dissipating fin 53, so that the hot air at the first heat dissipating fin 53 will not directly escape to the surroundings. The hot air inside the side supporting shell 3 and the first heat dissipating fin 53 can be discharged to the outside through the air pipe 6 through the exhaust fan 7, or the air can be sucked from the outside through the exhaust fan 7 and transported to the inside of the vehicle body.

[0027] like Figure 3 , Figure 5 and Figure 6 As shown, a thermoelectric power generation sheet 8 and a second heat dissipation fin 9 are installed inside the side support shell 3, and an exhaust opening is opened on the same side of a pair of side support shells 3. The thermoelectric power generation sheet 8 is in conflict with the second heat dissipation fin 9, and the second heat dissipation fin 9 is located on the side of the thermoelectric power generation sheet 8 away from the coolant temporary storage box 44. The thermoelectric power generation sheet 8 is divided into a cold side and a hot side, wherein the cold side is in conflict with the second heat conduction plate on the coolant temporary storage box 44 for absorbing heat, and the hot side is in conflict with the second heat dissipation fin 9 for heat dissipation, and the exhaust opening is located on the side of the side support shell 3 away from the air collecting pipe 51, and the exhaust opening is connected with the second heat dissipation fin 9 and the air collecting pipe 51 to form an air flow channel.

[0028] The above scheme is adopted: by setting a thermoelectric power generation sheet 8, the cold surface of the thermoelectric power generation sheet 8 absorbs heat from the coolant temporary storage box 44, and then dissipates it from the hot surface to the second heat dissipation fin 9 to generate electricity through thermal energy. The exhaust opening is opened so that the second heat dissipation fin 9 inside the side support shell 3 maintains air flow when the air collecting duct 51 absorbs or blows out hot air. By setting the second heat dissipation fin 9, the heat dissipated by the thermoelectric power generation sheet 8 is outputted by the second heat dissipation fin 9, and then outputted to the outside of the vehicle body through the air collecting duct 51, or blown into the vehicle body to preheat the internal components of the vehicle body.

[0029] The working principle and use process of the present invention are as follows: when in use, after the engine body 1 is started, the first heat conducting plate 48 absorbs the heat emitted by the engine body 1 during operation, and at the same time guides the heat to the coolant pipe 41, and the coolant inside the coolant pipe 41 absorbs the heat to reduce the temperature at the engine body 1. At the same time, the infusion pump 47 is started to transport the coolant inside the delivery pipe 45 to the inside of the coolant pipe 41, so that the heated coolant is transported to the inside of the coolant temporary storage box 44 through the connecting pipes 42 and the discharge pipe 43 on both sides. In the coolant temporary storage box 44, a part of the heat is extracted through the second heat conducting plate and absorbed by the temperature difference power generation sheet 8, and then enters the delivery pipe 45 and is transported to the first heat dissipation fin 53 in the middle of the delivery pipe 45 for secondary heat dissipation, and finally refluxes to the inside of the coolant pipe 41 through the reflux pipe 46 and the infusion pump 47, completing the heat extraction at the engine body 1; After the heat extracted from the coolant temporary storage box 44 is absorbed by the temperature difference power generation sheet 8, the temperature difference power generation sheet 8 uses the heat to generate electricity, thereby improving the utilization rate of thermal energy. Then, the heat extracted from the hot surface of the temperature difference power generation sheet 8 is absorbed by the second heat dissipation fin 9, and dissipated into the air to form hot air. At the same time, the remaining heat inside the coolant is extracted and dissipated into the air through the first heat dissipation fin 53 in the middle of the conveying pipe 45, and the exhaust fan 7 inside the air supply pipe 6 is started synchronously. The selection can be made according to the vehicle body condition. When the temperature is too low, the exhaust fan 7 can be controlled to convey air to the first heat dissipation fin 53 and the second heat dissipation fin 9, so that the hot air is blown into the vehicle body to preheat the components inside the vehicle. If the vehicle body is in a high temperature state, the exhaust fan 7 can be used to draw air from the first heat dissipation fin 53 and the second heat dissipation fin 9 to remove the hot air inside the vehicle body and reduce the vehicle body temperature.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat recovery device for a hydrogen fuel cell engine, comprising an engine body (1), characterized in that: A main casing (2) is arranged on the top of the engine body (1), side support casings (3) are fixedly connected to both sides of the main casing (2), a heat conduction component (4) is arranged inside the main casing (2), and a pair of side support casings (3) are fixedly connected to the same side with a heat dissipation component (5); The heat-conducting component (4) comprises a plurality of coolant pipes (41) movably connected to the top of the main shell (2), the top of the coolant pipes (41) are linearly distributed and fixedly connected with connecting pipes (42), and the connecting pipe (42) located in the middle is used to connect the plurality of coolant pipes (41).

2. The heat recovery device for a hydrogen fuel cell engine according to claim 1, characterized in that: The heat-conducting component (4) further comprises a drainage pipe (43) fixedly connected to the connecting pipe (42); one end of the drainage pipe (43) away from the connecting pipe (42) is fixedly connected to a cooling liquid temporary storage box (44); a delivery pipe (45) is fixedly connected to the side of the cooling liquid temporary storage box (44); a return pipe (46) is fixedly connected to the middle of the delivery pipe (45); an infusion pump (47) is installed in the middle of the return pipe (46); and a first heat-conducting plate (48) is arranged at the bottom of the cooling liquid pipe (41).

3. The heat recovery device for a hydrogen fuel cell engine according to claim 2, characterized in that: The connecting pipe (42) is distributed at both ends and the middle of the cooling liquid pipe (41), and the drain pipe (43) is arranged on a side of the connecting pipe (42) located at both ends of the cooling liquid pipe (41) close to the side supporting shell (3), and an end of the drain pipe (43) away from the connecting pipe (42) penetrates the side supporting shell (3) and extends to the inside of the side supporting shell (3).

4. The hydrogen fuel cell engine heat recovery device according to claim 2, characterized in that: The cooling liquid temporary storage box (44) is located inside the side supporting shell (3) on a side close to the main shell (2); a second heat conduction plate protruding outward is provided in the middle of the cooling liquid temporary storage box (44); the delivery pipe (45) penetrates the side supporting shell (3) and extends to the outside of the side supporting shell (3); the delivery pipe (45) is simultaneously connected to a pair of cooling liquid temporary storage boxes (44); and the end of the return pipe (46) away from the delivery pipe (45) is connected to the connecting pipe (42) located in the middle of the cooling liquid pipe (41).

5. The heat recovery device for a hydrogen fuel cell engine according to claim 2, characterized in that: The infusion pump (47) is located on the side of the main shell (2) and is fixedly connected to the main shell (2); the first heat conducting plate (48) is located inside the main shell (2) and is fixedly connected to the main shell (2); the first heat conducting plate (48) is in contact with the engine body (1); and the first heat conducting plate (48) is fixedly connected to the coolant pipe (41).

6. The heat recovery device for a hydrogen fuel cell engine according to claim 1, characterized in that: The heat dissipation assembly (5) comprises an air collecting duct (51) fixedly connected to a pair of side support shells (3); a limiting box body (52) is provided on a side of the air collecting duct (51) away from the side support shells (3); a first heat dissipation fin (53) is provided inside the limiting box body (52); and a flow guide protrusion (54) is provided in the middle of the air collecting duct (51).

7. The heat recovery device for a hydrogen fuel cell engine according to claim 6, characterized in that: The gas collecting pipe (51) connects a pair of side support shells (3); the limit box (52) is fixedly connected to the middle of the delivery pipe (45), and the connection between the delivery pipe (45) and the return pipe (46) is enclosed in the limit box (52); an opening is provided on a side of the limit box (52) away from the gas collecting pipe (51); the first heat dissipation fin (53) is fixedly connected to the middle of the delivery pipe (45); and the guide protrusion (54) is in the shape of a pointed angle that gathers upward.

8. The hydrogen fuel cell engine heat recovery device according to claim 6, characterized in that: The top of the air collecting pipe (51) is fixedly connected to an air delivery pipe (6), an exhaust fan (7) is fixedly installed inside the air delivery pipe (6), the air delivery pipe (6) is externally connected to an exhaust passage communicating with the outside of the vehicle body, the air delivery pipe (6) corresponds to the position of the guide protrusion (54), and the guide protrusion (54) is retracted toward the air delivery pipe (6).

9. The hydrogen fuel cell engine heat recovery device according to claim 1, characterized in that: A temperature difference power generation sheet (8) and a second heat dissipation fin (9) are installed inside the side support shell (3), and an exhaust opening is provided on the same side of a pair of the side support shells (3). The temperature difference power generation sheet (8) is in contact with the second heat dissipation fin (9), and the second heat dissipation fin (9) is located on a side of the temperature difference power generation sheet (8) away from the coolant temporary storage box (44).

10. The heat recovery device for a hydrogen fuel cell engine according to claim 9, characterized in that: The temperature difference power generation sheet (8) is divided into a cold surface and a hot surface, wherein the cold surface contacts the second heat conduction plate on the coolant temporary storage box (44) for absorbing heat, and the hot surface contacts the second heat dissipation fin (9) for dissipating heat, and the exhaust opening is located on a side of the side support shell (3) away from the air collecting pipe (51), and the exhaust opening is connected with the second heat dissipation fin (9) and the air collecting pipe (51) to form an air flow channel.

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