Integrated heat sink and its use in hydrogen fuel cell cooling

Abstract

The application relates to the field of fuel cell technology and particularly relates to an integrated radiator and application of the integrated radiator in hydrogen fuel cell heat dissipation, which comprises an air extractor, a shell and a rack body which is detachably arranged in the shell, a plurality of groups of parallel heat dissipation fins are equidistantly arranged in the rack body, a guide structure is rotatably arranged on the rack body, the guide structure is used for changing the movement path of air after the air enters adjacent two groups of the heat dissipation fins, a traction assembly is arranged on the rack body and connected with the guide structure, the traction assembly can drive the guide structure to move, the guide structure and the heat dissipation fins can form a drainage channel which enables air to directly move towards the middle part of the heat dissipation fins, the guide structure can have two different position states, and therefore, uniform and sufficient heat dissipation can be achieved in the process of heat dissipation.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, specifically to an integrated heat sink and its application in heat dissipation of hydrogen fuel cells. Background Technology

[0002] Hydrogen fuel cells have garnered significant attention across numerous fields due to their clean and efficient advantages. In the transportation sector, hydrogen fuel cell vehicles not only offer rapid refueling, long driving range, and zero emissions, but their performance continues to improve. Furthermore, hydrogen fuel cells demonstrate broad application prospects in distributed power generation and portable power sources due to their high efficiency and environmental friendliness.

[0003] However, hydrogen fuel cells generate a significant amount of heat during charging and discharging. Excessive heat can degrade battery performance, shorten lifespan, and even pose safety hazards. Therefore, effective heat dissipation is crucial for the performance and safety of hydrogen fuel cells.

[0004] Currently, air cooling is one of the most common heat dissipation methods. In an air-cooled system, air flows into the gaps between the heat sink fins under negative pressure, exchanging heat with the fins to achieve heat dissipation. However, this design has shortcomings: air mainly enters from both sides of the heat sink fins, forming a parabolic trajectory between the fins. When a hydrogen fuel cell is in a high-power charging and discharging state, localized high temperatures can easily form in its center. This air movement trajectory prevents the heat in the center of the heat sink fins from being quickly and effectively dissipated, thus affecting the overall performance of the hydrogen fuel cell. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated heat sink and its application in heat dissipation of hydrogen fuel cells, 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:

[0007] An integrated heat sink includes: an exhaust fan, a housing, and a detachable frame installed inside the housing, wherein multiple sets of parallel heat dissipation fins are equidistantly arranged inside the frame.

[0008] A guide structure is rotatably mounted on the frame, and the guide structure is used to change the movement path of air after it enters two adjacent sets of heat dissipation fins;

[0009] A traction assembly is mounted on the frame and connected to the guide structure. The traction assembly can drive the guide structure to move and form a channel between the guide structure and the heat dissipation fins, allowing air to move directly toward the center of the heat dissipation fins.

[0010] As a further aspect of the present invention: the guiding structure includes a deflection plate group symmetrically arranged between two adjacent groups of heat dissipation fins, the deflection plate group being formed by multiple groups of parallel guiding plates;

[0011] The guide plate has a separated state and an extended state that can be changed by being pulled. When the guide plate is in the separated state, air can move toward the exhaust fan through the gap between two adjacent sets of guide plates. When the guide plate is in the extended state, the guide plate can form the airflow channel with the heat dissipation fins.

[0012] As a further aspect of the present invention, the distance between the rotating shafts of two adjacent sets of guide plates is less than the length of the guide plate.

[0013] As a further embodiment of the present invention: the traction assembly includes a guide portion fixedly installed on the frame, and a double-headed electric telescopic rod is slidably installed on the guide portion. The two moving ends of the double-headed electric telescopic rod are connected to the rotating shaft of the guide plate through a traction deflection structure.

[0014] When the guide plate's shaft rotates, the double-headed electric telescopic rod can slide along the length of the guide section.

[0015] As a further embodiment of the present invention: the traction deflection structure includes a drive rod fixedly connected to the moving end of the double-headed electric telescopic rod, and multiple sets of connecting rods are rotatably mounted on the drive rod, the connecting rods being connected to the rotating shaft of the guide plate;

[0016] The rotating shafts of two adjacent sets of guide plates, and the connecting rods and driving rods of two adjacent sets form a parallelogram structure.

[0017] As a further aspect of the present invention, it also includes:

[0018] A side air inlet is provided on the frame and located between the exhaust fan and the guide plate;

[0019] A blocking assembly is disposed on the frame and connected to the drive rod. The blocking assembly can open the side air intake when a drainage channel is formed between the guide plate and the heat sink fins.

[0020] As a further embodiment of the present invention: the sealing assembly includes a sliding groove disposed between the frame and the heat dissipation fins, a sealing plate is slidably installed in the sliding groove, the sealing plate is fixedly connected to a driven rod that slides through the heat dissipation fins, and the driven rod is connected to the frame by a cylindrical spring;

[0021] The sealing assembly also includes an abutment structure disposed between the driven rod and the driving rod, the abutment structure being able to misalign the sealing plate with the side air inlet when the driving rod is actuated.

[0022] As a further embodiment of the present invention: the abutting structure includes an abutting portion disposed on the driven rod and a convex shaft rotatably connected to the driving rod. An inclined surface is formed on the abutting portion, and the inclined surface abuts and engages with the convex shaft, thereby driving the driven rod to move.

[0023] An application of the integrated heat sink as described above in heat dissipation of hydrogen fuel cells.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] Through the designed guiding structure and traction components, the guide plate has two positional states. On the one hand, it optimizes the airflow path, not only forming a serpentine trajectory between the guide plate and the hydrogen fuel cell to achieve full contact and direct heat exchange, but also evenly converging towards the exhaust fan to efficiently remove heat from the heat dissipation fins, achieving uniform heat dissipation. This design significantly improves the heat dissipation efficiency of the hydrogen fuel cell, ensuring that the hydrogen fuel cell remains within a suitable operating temperature range during low-power charging and discharging, maintaining its stable performance. On the other hand, the guide plate forms a plate-like structure, which increases the airflow in the middle of the heat dissipation fins, allowing heat to be transferred to the air and carried away more efficiently, achieving a higher heat exchange effect, improving heat dissipation efficiency, and avoiding localized high temperatures in the middle of the heat dissipation fins. This effectively prevents the hydrogen fuel cell from deforming and cracking due to localized high temperatures, ensuring its structural stability and performance.

[0026] By incorporating side air inlets and sealing components, the system first ensures that when the guide plate is in the separated state, the airflow from the portion of the heat dissipation fins protruding from the frame enters between adjacent heat dissipation fins, guaranteeing the heat dissipation effect of the hydrogen fuel cell during low-power charging and discharging. Secondly, when the guide plate is in the extended state, some external air can enter the interior of the heat dissipation fins through the side air inlets. This allows for concentrated heat dissipation not only to the center of the heat dissipation fins but also to auxiliary heat dissipation to the sides of the heat dissipation fins, thus ensuring the heat dissipation effect. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of one embodiment of an integrated heat sink.

[0028] Figure 2 This is a structural schematic diagram from another angle of one embodiment of an integrated heat sink.

[0029] Figure 3 This is an exploded view of one embodiment of an integrated heat sink.

[0030] Figure 4 This is a schematic diagram of the structure of the frame and heat dissipation fins in one embodiment of an integrated heat sink.

[0031] Figure 5 This is a schematic diagram of the traction component in one embodiment of an integrated heat sink.

[0032] Figure 6 for Figure 5 Enlarged view of the structure at point A in the middle.

[0033] Figure 7 This is a schematic diagram of the sealing component in one embodiment of an integrated heat sink.

[0034] Figure 8 This is a schematic diagram of the guiding structure and traction assembly in one embodiment of an integrated heat sink.

[0035] Figure 9 This is a schematic diagram of the guide structure in two positional states in one embodiment of an integrated heat sink.

[0036] In the diagram: 1. Exhaust fan; 2. Outer casing; 3. Frame; 301. Side air inlet; 302. Slide groove; 4. Heat dissipation fins; 401. Through hole; 5. Guide plate; 6. Connecting rod; 7. Drive rod; 8. Electric telescopic rod; 9. Guide part; 10. Protruding shaft; 11. Driven rod; 1101. Sliding connection part; 12. Guide component; 13. Abutment part; 1301. Inclined surface; 14. Sealing plate; 15. Cylindrical spring; 16. Drainage channel. Detailed Implementation

[0037] 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.

[0038] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0039] Please see Figures 1-9In this embodiment of the invention, an integrated heat sink includes: an exhaust fan 1, a housing 2, and a detachable frame 3 installed within the housing 2, a guide structure, and a traction assembly. The detachable connection between the housing 2 and the frame 3 is commonly achieved through bolted or snap-fit ​​connections, which are within their applicable scope. This design offers the key advantage of facilitating routine maintenance. During the long-term operation of a hydrogen fuel cell, dust inevitably accumulates on the heat dissipation fins 4. The detachable connection allows for the rapid disassembly of the frame 3 and the heat dissipation fins 4, significantly reducing disassembly time and improving equipment maintenance efficiency. It also facilitates thorough cleaning of the heat dissipation fins 4, helping to ensure the equipment's heat dissipation performance, thereby extending the lifespan of the hydrogen fuel cell and ensuring its long-term stable operation.

[0040] Within the frame 3, multiple sets of parallel heat dissipation fins 4 are arranged at equal intervals. These heat dissipation fins 4 are provided with through holes 401 connecting their upper and lower sides. In actual use, the side of the heat dissipation fins 4 away from the exhaust fan 1 is tightly attached to the surface of the hydrogen fuel cell. In this way, the heat generated during the charging and discharging of the hydrogen fuel cell can be transferred to the heat dissipation fins 4 in a highly efficient heat exchange mode. When the exhaust fan 1 is started and put into operation, the suction force it generates can facilitate the smooth entry of external air into the interlayer area between two adjacent sets of heat dissipation fins 4. In this area, the air and the heat dissipation fins 4 are in full contact and heat exchange occurs. The heat is then transferred from the heat dissipation fins 4 to the air and effectively carried away. This process effectively ensures that the heat dissipation fins 4 and the hydrogen fuel cell maintain good heat exchange efficiency, ensuring that the hydrogen fuel cell can operate stably within a suitable temperature range, which is beneficial to extending the battery's service life and improving its overall performance.

[0041] Furthermore, the through holes 401 provided on the heat dissipation fins 4 play a crucial role. They allow the air between the two adjacent sets of heat dissipation fins 4 at the top to flow continuously and smoothly to the two adjacent sets of heat dissipation fins 4 at the bottom. This design provides more diverse airflow paths, greatly optimizes the airflow between the four sets of heat dissipation fins, and avoids the problem of heat dissipation dead zones caused by poor local airflow.

[0042] In the longitudinal direction, the air that was originally at the edge and had relatively weak heat exchange can also move smoothly to the middle two sets of heat dissipation fins 4 during the air flow. During the longitudinal movement, this part of the air can further contact the heat dissipation fins 4 and exchange heat, fully tapping the heat dissipation potential of the air, thus significantly improving the overall heat exchange effect and effectively ensuring the high-efficiency heat dissipation performance of the entire heat dissipation system. At the same time, when the air flows through the through hole 401, it will also have additional heat exchange with the internal structure of the heat dissipation fins 4, which is like conducting internal heat dissipation on the heat dissipation fins 4, further enhancing the heat dissipation effect.

[0043] In summary, the structure of the heat dissipation fins 4 and their through holes 401, together with the operation of the exhaust fan 1, constructs an efficient and multi-dimensional heat dissipation system, which comprehensively ensures the heat dissipation requirements of the hydrogen fuel cell during charging and discharging, provides a solid heat dissipation foundation for the reliable operation of the hydrogen fuel cell, and creates favorable conditions for it to maintain stable performance under long-term, high-intensity operating conditions.

[0044] Please see Figure 4 , Figures 8-9 The guiding structure is rotatably mounted on the frame 3. The guiding structure is used to change the movement path of air after entering the two adjacent sets of heat dissipation fins 4. Specifically, the guiding structure includes a deflection plate group symmetrically arranged between the two adjacent sets of heat dissipation fins 4. The deflection plate group is formed by multiple sets of parallel guide plates 5. The guide plates 5 are rotatably mounted between the two adjacent sets of heat dissipation fins 4, and the guide plates 5 are in a state of sliding contact with the heat dissipation fins 4. This allows the heat transferred to the heat dissipation fins 4 to be transferred to the guide plates 5, and the air can exchange heat with the guide plates 5. In the process of air flow, the heat exchange area is further increased, so that the air can carry out more complete heat exchange and remove more heat, thereby further improving the cooling effect.

[0045] The guide plate 5 has a separated state and an extended state that can be changed by being pulled. When the guide plate 5 is in the separated state, air can move toward the exhaust fan 1 through the gap between two adjacent sets of guide plates 5. When the guide plate 5 is in the extended state, the guide plate 5 can form the airflow channel 16 with the heat dissipation fins 4.

[0046] See Figure 9The upper diagram shows the separated state, while the lower diagram shows the extended state. In the separated state, there is a gap between the two adjacent sets of guide plates 5. When the exhaust fan 1 is running, a uniform negative pressure is formed between the two adjacent sets of heat dissipation fins 4. At this time, external air enters between the adjacent heat dissipation fins 4 through the part of the heat dissipation fins 4 that protrudes from the frame 3, and naturally generates a tendency to move laterally. Under the action of negative pressure, part of the air flows towards the exhaust fan 1 through the gap between the adjacent guide plates 5, while the other part of the air continues to move laterally and towards the hydrogen fuel cell under the guidance of the guide plates 5. When this part of the air comes into contact with the hydrogen fuel cell, the two directly exchange heat, further improving the heat exchange effect.

[0047] In this embodiment, when the guide plate 5 is in the separated state, the airflow path is optimized. This not only creates a serpentine trajectory between the guide plate 5 and the hydrogen fuel cell, achieving full contact and direct heat exchange, but also allows the airflow to converge evenly towards the exhaust fan 1, efficiently carrying away heat from the heat dissipation fins 4, thus achieving uniform heat dissipation. This design significantly improves the heat dissipation efficiency of the hydrogen fuel cell, ensuring that it remains within a suitable operating temperature range during low-power charging and discharging, maintaining stable performance. Simultaneously, uniform heat dissipation helps extend the lifespan of the hydrogen fuel cell, reducing the risk of performance degradation due to uneven temperature distribution, and providing strong support for the reliable operation of the hydrogen fuel cell.

[0048] It should be noted that, when the air moves laterally, the amount of air entering the heat dissipation fins 4 is theoretically less than the amount of air on the side. However, during the low-power charging and discharging process of the hydrogen fuel cell, the heat generated is relatively small. After the heat on the side is carried away, the heat in the middle of the heat dissipation fins 4 can be transferred to the side, thereby achieving a relatively constant temperature.

[0049] The distance between the rotating shafts of two adjacent sets of guide plates 5 is less than the length of the guide plate 5.

[0050] Furthermore, when two adjacent sets of guide plates 5 are in an extended state, since the distance between the pivots of the guide plates 5 is less than the length of the guide plates 5, one end of the guide plate 5 will fit against the other set of guide plates 5 near the pivot end, forming a closed plate-like structure. At this time, external air is drawn into the space between the two sets of heat dissipation fins 4, and will move laterally in the flow channel 16. After moving to the end of the plate-like structure formed by the guide plates 5, it will move towards the exhaust fan 1. That is, the air moves towards the exhaust fan 1 only after it reaches the middle position of the end of the heat dissipation fins 4.

[0051] When the heat from high-power charging and discharging of the hydrogen fuel cell is concentrated in the middle of the heat dissipation fin 4, the above design can increase the airflow in the middle of the heat dissipation fin 4, so that the heat can be transferred to the air and carried away more efficiently, achieving a higher heat exchange effect, improving heat dissipation efficiency, and avoiding local high temperature in the middle of the heat dissipation fin 4. This effectively prevents the hydrogen fuel cell from deforming and cracking due to local high temperature, ensuring its structural stability and performance. At the same time, the optimized heat dissipation system extends the service life of the hydrogen fuel cell, reduces maintenance costs, and makes it safer and more reliable when operating at high power.

[0052] Please see Figures 5-6 The traction component is mounted on the frame 3 and connected to the guide structure. The traction component can drive the guide structure to move and form a flow channel 16 between the guide structure and the heat dissipation fin 4, allowing air to move directly toward the center of the heat dissipation fin 4.

[0053] The traction assembly includes a guide part 9 fixedly installed on the frame 3, and a double-headed electric telescopic rod 8 is slidably installed on the guide part 9. The two moving ends of the double-headed electric telescopic rod 8 are connected to the rotating shaft of the guide plate 5 through a traction deflection structure.

[0054] When the pivot of the guide plate 5 rotates, the double-headed electric telescopic rod 8 can slide along the length of the guide part 9;

[0055] The traction deflection structure includes a drive rod 7 fixedly connected to the actuating end of the double-headed electric telescopic rod 8. Multiple sets of connecting rods 6 are rotatably mounted on the drive rod 7, and the connecting rods 6 are connected to the rotating shaft of the guide plate 5.

[0056] The rotating shafts of two adjacent sets of guide plates 5, and the connecting rods 6 and driving rods 7 of two adjacent sets form a parallelogram structure.

[0057] When the guide plate 5 switches from the separated state to the extended state, the dual-headed electric telescopic rod 8 starts and drives the two sets of drive rods 7 to move away from each other. The drive rods 7 simultaneously drive the connecting rod 6 connected to the rotating shaft of the guide plate 5 to operate. The connecting rod 6 moves in a circle with the rotating shaft of the guide plate 5 as the center, thereby precisely controlling the deflection of the guide plate 5 and realizing the smooth switching of the guide plate 5 between the separated state and the extended state. This design ensures that when the hydrogen fuel cell switches between low-power and high-power charging and discharging modes, the heat dissipation system can flexibly and timely adapt to and adjust the heat dissipation state, maintaining the stability and efficiency of heat dissipation.

[0058] Since the rotating shafts of two adjacent sets of guide plates 5, as well as the two adjacent sets of connecting rods 6 and drive rods 7, together form a parallelogram structure, the drive rod 7 can produce a translational effect when it moves. This ensures the synchronous movement of multiple sets of connecting rods 6 and guide plates 5, and also ensures the orientation stability of the drive rod 7 during movement. This stable synchronous movement mechanism not only improves the reliability of the heat dissipation system, but also enhances its adaptability under different working conditions.

[0059] With the above settings, the heat dissipation system can flexibly adjust the heat dissipation path and efficiency according to the changes in the charging and discharging power of the hydrogen fuel cell. During low-power charging and discharging, the guide plate 5 is in a separated state, providing basic and uniform heat dissipation; while during high-power charging and discharging, the guide plate 5 switches to an extended state, enhancing the heat dissipation effect on the middle part.

[0060] Please see Figure 4 , Figure 6 , Figure 7 The integrated heat sink also includes a side air intake 301 and a sealing assembly.

[0061] The side air inlet 301 is provided on the frame 3 and located between the exhaust fan 1 and the guide plate 5;

[0062] The sealing component is mounted on the frame 3 and connected to the drive rod 7. When the sealing component forms a drainage channel 16 between the guide plate 5 and the heat sink fin 4, the side air intake 301 is opened.

[0063] The sealing assembly includes a groove 302 disposed between the frame 3 and the heat dissipation fins 4. A sealing plate 14 is slidably installed in the groove 302. The sealing plate 14 is fixedly connected to a driven rod 11 that slides through the heat dissipation fins 4. The driven rod 11 is connected to the frame 3 by a columnar spring 15. A sliding connection part 1101 is formed on the driven rod 11. The sliding connection part 1101 is slidably connected to a guide member 12 disposed on the frame 3. The sliding connection part 1101 and the guide member 12 enable the driven rod 11 to be oriented in a directional manner, preventing it from being stuck due to unilateral force and causing difficulty in movement.

[0064] The sealing assembly also includes an abutment structure disposed between the driven rod 11 and the driving rod 7. The abutment structure can cause the sealing plate 14 to be misaligned with the side air inlet 301 when the driving rod 7 is actuated.

[0065] The abutting structure includes an abutting part 13 disposed on the driven rod 11 and a convex shaft 10 rotatably connected to the driving rod 7. An inclined surface 1301 is formed on the abutting part 13, and the inclined surface 1301 abuts and engages with the convex shaft 10, thereby driving the driven rod 11 to move.

[0066] When the guide plate 5 is in the separated state, it can achieve uniform heat dissipation of the heat dissipation fins 4. At this time, the side air inlet 301 is blocked to avoid insufficient air intake between adjacent heat dissipation fins 4 due to the side air inlet 301 also allowing air to enter.

[0067] When the guide plate 5 switches from the separated state to the extended state, the drive rod 7 will move accordingly. At this time, the convex shaft 10 connected to the drive rod 7 will move in a circular motion toward the inclined surface 1301. During the process of the convex shaft 10 cooperating with the inclined surface 1301, it drives the driven rod 11 to move, so that the sealing plate 14 can be separated from the side air inlet 301. At this time, the side air inlet 301 is in a conducting state, so that external air can also enter the heat dissipation fin 4 through the side air inlet 301. The significance of this setting is that when the guide plate 5 is in the extended state, the air will move toward the middle of the heat dissipation fin 4 and then toward the exhaust fan 1, which will cause the heat dissipation effect on both sides of the heat dissipation fin 4 to decrease. By allowing external air to partially enter the heat dissipation fin 4 through the side air inlet 301, in the extended state, not only can the middle of the heat dissipation fin 4 be concentrated for heat dissipation, but the sides of the heat dissipation fin 4 can also be assisted for heat dissipation, thus ensuring the heat dissipation effect.

[0068] It should also be noted that when air enters the heat dissipation fins 4 through the side air inlet 301, the air moves in a parabolic motion. At this time, there are actually two airflows in the heat dissipation fins 4, and a vacuum zone is generated between the two airflows. As a result, the heat on the heat dissipation fins 4 located in the vacuum zone cannot be effectively dissipated. However, the heat in this area can be dissipated when the guide plate 5 is in the separated state. Therefore, in actual use, even if the hydrogen fuel cell is in a high-power charging and discharging state, the guide plate 5 should still periodically switch between the separated state and the extended state to maintain a stable heat dissipation effect.

[0069] As an embodiment of the present invention, an application of the integrated heat sink as described above in heat dissipation of hydrogen fuel cells is also proposed.

[0070] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0071] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An integrated heat spreader, comprising: The fan (1), the outer casing (2) and the detachable frame (3) installed inside the outer casing (2), wherein multiple sets of parallel heat dissipation fins (4) are equidistantly arranged inside the frame (3). Its characteristic is that it further includes: A guide structure is rotatably mounted on the frame (3). The guide structure is used to change the movement path of air after it enters the two adjacent sets of heat dissipation fins (4). A traction component is provided on the frame (3) and connected to the guide structure. The traction component can drive the guide structure to move and form a flow channel (16) between the guide structure and the heat dissipation fins (4) so ​​that air can move directly toward the middle of the heat dissipation fins (4). The guiding structure includes a deflection plate group symmetrically arranged between two adjacent sets of heat dissipation fins (4), and the deflection plate group is formed by multiple sets of parallel guiding plates (5); The guide plate (5) has a separated state and an extended state that can be changed by being pulled. When the guide plate (5) is in the separated state, air can move toward the exhaust fan (1) through the gap between two adjacent sets of guide plates (5). When the guide plate (5) is in the extended state, the guide plate (5) can form the drainage channel (16) between itself and the heat dissipation fins (4). The distance between the rotating shafts of two adjacent sets of guide plates (5) is less than the length of the guide plate (5); The traction assembly includes a guide part (9) fixedly installed on the frame (3), and a double-headed electric telescopic rod (8) is slidably installed on the guide part (9). The two moving ends of the double-headed electric telescopic rod (8) are connected to the rotating shaft of the guide plate (5) through a traction deflection structure. When the shaft of the guide plate (5) rotates, the double-headed electric telescopic rod (8) can slide along the length direction of the guide part (9).

2. An integrated heat spreader as claimed in claim 1, wherein The traction deflection structure includes a drive rod (7) fixedly connected to the actuating end of the double-headed electric telescopic rod (8), and multiple sets of connecting rods (6) are rotatably mounted on the drive rod (7). The connecting rods (6) are connected to the rotating shaft of the guide plate (5). The rotating shafts of two adjacent sets of guide plates (5), the connecting rods (6) and the driving rods (7) of two adjacent sets form a parallelogram structure.

3. An integrated heat spreader as claimed in claim 2, wherein Also includes: A side air inlet (301) is provided on the frame (3) and located between the exhaust fan (1) and the guide plate (5); A blocking assembly is disposed on the frame (3) and connected to the drive rod (7). When the blocking assembly forms a drainage channel (16) between the guide plate (5) and the heat sink fins (4), the side air inlet (301) is opened.

4. An integrated heat spreader as claimed in claim 3, wherein The sealing assembly includes a groove (302) disposed between the frame (3) and the heat dissipation fins (4), a sealing plate (14) is slidably installed in the groove (302), the sealing plate (14) is fixedly connected to a driven rod (11) slidably disposed through the heat dissipation fins (4), and the driven rod (11) is connected to the frame (3) by a columnar spring (15); The sealing assembly also includes an abutment structure disposed between the driven rod (11) and the driving rod (7), the abutment structure being able to misalign the sealing plate (14) with the side air inlet (301) when the driving rod (7) is actuated.

5. An integrated heat spreader as claimed in claim 4, wherein, The abutting structure includes an abutting part (13) provided on the driven rod (11) and a convex shaft (10) rotatably connected to the driving rod (7). An inclined surface (1301) is formed on the abutting part (13), and the inclined surface (1301) abuts and cooperates with the convex shaft (10) to drive the driven rod (11) to move.

6. The application of an integrated heat sink as described in any one of claims 1 to 5 in heat dissipation of a hydrogen fuel cell.

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