A combined dual-temperature-zone radiator suitable for fuel cells

Abstract

The application relates to the technical field of radiators, in particular to a combined double-temperature-zone radiator suitable for fuel cells, which comprises an outer shell body, a fan and a liquid cooling device arranged on the two sides of the outer shell body; a connecting plate and multiple groups of first radiating fins equidistantly distributed on the connecting plate, a flow guide channel being arranged between the connecting plate and the first radiating fins; second radiating fins, the second radiating fins being attached to the surfaces of the corresponding first radiating fins; a driving structure, the driving structure being capable of driving the second radiating fins to bend; a guide assembly connected to the driving structure, when the second radiating fins bend, the guide assembly is capable of driving the air cooled to flow back to the first radiating fins through the flow guide channel; and a temperature detection unit electrically connected to the driving structure and the fan, the temperature detection unit is capable of increasing the rotating speed of the fan and controlling the driving structure to act when the temperature of the fuel cell stack exceeds a threshold value, so that the heat dissipation efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of radiator technology, specifically a combined dual-temperature zone radiator suitable for fuel cells. Background Technology

[0002] Currently, under high-load conditions in vehicles, the output current of fuel cell systems increases dramatically, and the heat generation rate rises exponentially, placing stringent demands on the instantaneous heat exchange capacity of the cooling system.

[0003] In existing technologies, the common control strategy to cope with such transient high heat loads is to increase the speed of the cooling fan in order to enhance heat dissipation by increasing the convective heat transfer coefficient. However, in practical applications, as the fan speed increases, the air velocity on the surface of the heat sink fins increases. Although the high-speed airflow can thin the thermal boundary layer, the increase in the convective heat transfer coefficient decreases with increasing velocity due to the proportion of air-side thermal resistance to total thermal resistance. Furthermore, the contact time between the airflow and the heat sink fins is shortened, resulting in a large amount of unsaturated air escaping directly. The fan power consumption is not effectively converted into actual heat exchange. When the fan speed exceeds a certain critical value, the aerodynamic power consumption increases rapidly while the increase in heat exchange slows down, forming a high power consumption and low gain operating range, which affects the heat dissipation capacity under extreme conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a combined dual-temperature zone radiator suitable for fuel cells, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A combined dual-temperature zone radiator suitable for fuel cells, comprising: The outer casing has a fan and a liquid cooling device on each side, and the liquid cooling device has two independent circulation channels. The connecting plate and multiple sets of first heat dissipation fins equidistantly distributed on the connecting plate are integrally formed with the liquid cooling device, and a flow channel is provided between the connecting plate and the first heat dissipation fins. The second heat dissipation fins are provided in multiple sets and connected to the connecting plate, and the second heat dissipation fins are in contact with the surface of the corresponding first heat dissipation fins. A driving structure is connected to the end of the second heat sink fin away from the connecting plate, and the driving structure can drive the second heat sink fin to bend. A guiding component, connected to the driving structure, enables the cooled air to flow back to the first heat dissipation fins via the drainage channel when the second heat dissipation fins are bent. The temperature detection unit is electrically connected to the drive structure and the fan. When the temperature of the fuel cell stack exceeds the threshold, the temperature detection unit can increase the fan speed and control the operation of the drive structure.

[0006] The combined dual-temperature zone radiator for fuel cells as described above: a distribution plate is provided on the side of the fan facing the connecting plate, and multiple sets of concentric annular distribution rings are provided on the distribution plate. Each set of annular distribution rings consists of multiple sets of through holes with the same diameter, and the diameter of the through holes on the outer annular distribution ring is smaller than the diameter of the through holes on the inner annular distribution ring.

[0007] The combined dual-temperature zone radiator for fuel cells as described above: the drive structure includes a connecting frame rotatably connected to one end of the second heat dissipation fin away from the connecting plate and an electric telescopic rod rotatably mounted on the outer casing, the actuating end of the electric telescopic rod being rotatably connected to the connecting frame; The electric telescopic rod is electrically connected to the temperature detection unit.

[0008] The combined dual-temperature zone radiator for fuel cells as described above: the airflow channel includes multiple sets of air guide channels disposed on the connecting plate and multiple sets of air supply channels disposed on the first heat dissipation fins. Multiple sets of air supply holes perpendicular to the surface of the first heat dissipation fins and communicating with the outside are equidistantly disposed on the air supply channels.

[0009] The combined dual-temperature zone radiator for fuel cells as described above: the guiding assembly includes a guide member disposed on the side of the connecting plate and a tensioning structure connecting the guide member and the connecting frame. The guide member is capable of guiding the air discharged from the sides of the first heat dissipation fins and the second heat dissipation fins into the drainage channel.

[0010] The combined dual-temperature zone radiator for fuel cells described above: the cross-section of the guide has a U-shaped structure.

[0011] The combined dual-temperature zone radiator for fuel cells as described above: a guide frame is detachably mounted on the guide member, and the guide frame is slidably connected to a transverse axis disposed on the outer casing.

[0012] The combined dual-temperature zone radiator for fuel cells as described above: the tensioning structure includes a first convex shaft connecting the connecting frame and a second convex shaft connecting the guide frame; The traction structure also includes a lifting component that is slidably connected to the side of the outer shell via a guide structure. The lifting component is provided with a drive groove, which is adapted to the first convex shaft and the second convex shaft.

[0013] The combined dual-temperature zone radiator for fuel cells as described above: the drive tank includes a horizontal groove and an inclined groove disposed on the lifting member, the first convex shaft can slide in the horizontal groove, and the second convex shaft can slide in the inclined groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are: By setting up a guiding component, some of the air can flow back into the fins after air cooling, thereby improving the utilization rate of this air and allowing it to carry sufficient heat before escaping. This avoids the high wind speed generated by the fan at high speed, which would cause the air to be discharged before sufficient heat exchange with the first heat dissipation fins. Furthermore, the air discharged from the air outlet can impact the air moving along the length of the first heat dissipation fins, creating turbulence and disrupting the boundary effect between the air and the first heat dissipation fins. This slows down the rate of decrease in heat dissipation capacity under extreme heat loads, ensuring that the equipment can operate within a highly efficient heat dissipation range, even with the same fan power. By using the second heat dissipation fins and the drive structure, the heat exchange area between the air and the fins can be increased when the temperature of the fuel cell stack is higher than the threshold, thereby improving the heat dissipation effect. In addition, the second heat dissipation fins, which are in a bent state, can guide the air towards the corresponding first heat dissipation fins, thereby generating a corresponding turbulence effect and further improving the heat dissipation effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a combined dual-temperature zone radiator suitable for fuel cells.

[0016] Figure 2 A side view of a combined dual-temperature zone radiator suitable for fuel cells.

[0017] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle.

[0018] Figure 4 This is a schematic diagram of the liquid cooling device, connecting plate, first heat dissipation fin, second heat dissipation fin, and drive structure in a combined dual-temperature zone radiator suitable for fuel cells.

[0019] Figure 5 This is a schematic diagram of the state structure of the second heat dissipation fin when the temperature of the fuel cell stack exceeds the threshold in a combined dual-temperature zone radiator suitable for fuel cells.

[0020] Figure 6 This is a schematic diagram of the air movement path in a combined dual-temperature zone radiator suitable for fuel cells.

[0021] Figure 7This is a schematic diagram of the distribution plate in a combined dual-temperature zone radiator suitable for fuel cells.

[0022] Figure 8 This is a schematic diagram showing the position of the guide relative to the connecting plate in different states in a combined dual-temperature zone radiator suitable for fuel cells.

[0023] Figure 9 for Figure 8 A magnified view of the structure and gas flow trend at point B.

[0024] In the diagram: 1. Outer shell; 2. Fan; 3. Liquid cooling device; 4. Connecting plate; 401. Air guide channel; 5. First heat dissipation fin; 501. Air outlet; 6. Second heat dissipation fin; 7. Connecting frame; 701. First convex shaft; 8. Electric telescopic rod; 9. Lifting component; 901. Horizontal groove; 902. Inclined groove; 10. Guide structure; 11. Guide component; 12. Horizontal shaft; 13. Guide frame; 14. Second convex shaft; 15. Distribution plate; 1501. Through hole. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Please see Figures 1-9 As an embodiment of the present invention, the combined dual-temperature zone radiator suitable for fuel cells includes: an outer shell 1, a connecting plate 4, a second heat dissipation fin 6, a drive structure, a guide component, and a temperature detection unit.

[0027] A fan 2 and a liquid cooling device 3 are respectively provided on both sides of the outer casing 1. The liquid cooling device 3 has two independent circulation channels, each using an independent circulation pump. One set of circulation channels is used to cool the fuel cell stack, and the other set of circulation channels is used to dissipate heat from auxiliary components such as the air compressor and D / C converter.

[0028] Multiple sets of first heat dissipation fins 5 are evenly distributed on the connecting plate 4. The connecting plate 4 is integrally formed with the liquid cooling device 3, and a flow channel is provided between the connecting plate 4 and the first heat dissipation fins 5. The flow channel includes multiple sets of air guide channels 401 provided on the connecting plate 4 and multiple sets of air supply channels provided on the first heat dissipation fins 5. Multiple sets of air supply holes 501 perpendicular to the surface of the first heat dissipation fins 5 and connected to the outside are evenly distributed on the air supply channels.

[0029] In this embodiment, under rated operating conditions, the fan 2 rotates and draws in external air, causing the cooled external air to impact the connecting plate 4 and be discharged outward along the gap between two adjacent sets of first heat dissipation fins 5. During this process, the external air can exchange heat with the connecting plate 4 and the first heat dissipation fins 5, so that the temperature of the connecting plate 4 and the first heat dissipation fins 5 decreases, thereby allowing the temperature inside the liquid cooling device 3 to be transferred to the connecting plate 4 and the first heat dissipation fins 5, thereby achieving continuous heat dissipation and ensuring the heat dissipation effect of the fuel cell stack, air compressor, D / C converter and other components.

[0030] When the vehicle is under high load, such as when climbing a hill or accelerating rapidly, the fuel cell will release a larger current. At this time, the heat generated in the fuel cell stack will also rise sharply. The temperature detection unit can detect the temperature of the stack and control the speed of the fan 2 to increase. At the same time, the guide component will move and extend to the air outlet of the cooling air, guiding the cooled and exhausted air into the air guide channel 401. At this time, the air can enter the air guide channel 401 and the air supply channel, and be discharged from the air outlet 501. During this process, the air moving along the length of the first heat dissipation fin 5 can impact the air discharged from the air outlet 501, causing turbulence in the air moving along the length of the first heat dissipation fin 5. This turbulence can destroy the boundary effect between the air and the first heat dissipation fin 5, thereby enabling the air to have a better heat dissipation effect with the first heat dissipation fin 5.

[0031] Furthermore, by allowing some air to recirculate, the utilization rate of this air can be improved, allowing it to carry sufficient heat before escaping. This avoids the air being exhausted before sufficient heat exchange with the first heat dissipation fins 5 due to the high wind speed generated by the fan 2 at high speed, thus further improving the heat dissipation effect.

[0032] Please see Figure 7 The fan 2 is provided with a distribution plate 15 on the side facing the connecting plate 4. The distribution plate 15 is provided with multiple sets of concentric annular distribution rings. Each set of annular distribution rings is composed of multiple sets of through holes 1501 with the same diameter. The diameter of the through holes 1501 on the outer annular distribution ring is smaller than the diameter of the through holes 1501 on the inner annular distribution ring.

[0033] In the existing technology, during the rotation of the fan 2, the wind speed in the area near its axis of rotation is lower than that in other areas. This results in inconsistent wind speeds in different areas of the connecting plate 4 and the first heat dissipation fin 5. That is, the closer to the center of the connecting plate 4, the smaller the airflow. This will affect the heat dissipation effect to a certain extent. However, by setting the distribution plate 15 and the corresponding through holes 1501, the airflow generated by the fan 2 can be more easily discharged in the center and relatively difficult to be discharged at the edge. This allows the air generated by the fan 2 to act more evenly on the connecting plate 4 and the first heat dissipation fin 5, ensuring uniform heat dissipation in different areas of the connecting plate 4 and the first heat dissipation fin 5.

[0034] Please see Figures 2-6 The second heat dissipation fin 6 is provided with multiple sets and connected to the connecting plate 4, and the second heat dissipation fin 6 is attached to the surface of the corresponding first heat dissipation fin 5; The drive structure is connected to the end of the second heat sink 6 away from the connecting plate 4. The drive structure can drive the second heat sink 6 to bend. The drive structure includes a connecting frame 7 rotatably connected to the end of the second heat sink 6 away from the connecting plate 4 and an electric telescopic rod 8 rotatably mounted on the outer shell 1. The actuating end of the electric telescopic rod 8 is rotatably connected to the connecting frame 7. The electric telescopic rod 8 is electrically connected to the temperature detection unit.

[0035] In the initial state, the first heat dissipation fin 5 and the second heat dissipation fin 6 are in a close fit, and both are fixedly connected to the connecting plate 4, so that the heat of the connecting plate 4 can be transferred to the first heat dissipation fin 5 and the second heat dissipation fin 6. This allows the air to exchange heat with the surfaces of the first heat dissipation fin 5 and the second heat dissipation fin 6 under rated operating conditions, thereby achieving the effect of heat dissipation for the connecting plate 4 and the liquid cooling device 3.

[0036] When the temperature of the fuel cell stack exceeds the threshold, the temperature detection unit will control the electric telescopic rod 8 to move and push the connecting frame 7 to tilt. During this process, the connecting frame 7 will drive one end of the second heat dissipation fin 6 to move, causing the second heat dissipation fin 6 to bend (see appendix). Figure 5 At this time, a certain gap is formed between the first heat dissipation fin 5 and the second heat dissipation fin 6 at the ends away from the connecting plate 4, so that the air blown by the fan 2 toward the connecting plate 4 can move along the gap between them. That is, the area for heat exchange with the air will increase, thereby improving the heat exchange effect.

[0037] Furthermore, the aforementioned second heat dissipation fin 6 is made of an elastic metal material, and when it is bent to a predetermined degree, the end away from the connecting plate 4 is located in the middle of the two adjacent sets of first heat dissipation fins 5. That is, at this time, the airflow generated by the fan 2 can flow through the upper and lower parts of the second heat dissipation fin 6, avoiding the reduction of heat exchange area caused by air only flowing through the upper part of the second heat dissipation fin 6, thus ensuring the heat dissipation effect.

[0038] It should be noted that the reason why the second heat dissipation fin 6 is not bent under rated operating conditions is that the stable airflow generated by the fan 2 can meet the heat dissipation requirements under these conditions. At this time, keeping the first heat dissipation fin 5 and the second heat dissipation fin 6 in contact helps to maintain low wind resistance and operating noise. When the second heat dissipation fin 6 is bent, although it will lead to adverse effects such as increased wind resistance and increased noise, it can increase the effective convection heat transfer area, thereby improving the heat dissipation capacity under extreme operating conditions.

[0039] It should also be noted that the second heat dissipation fin 6 is within the range of elastic deformation when bent, and after the electric telescopic rod 8 retracts, it can rely on its own elasticity and the pulling force of the electric telescopic rod 8 to return to the state of being in contact with the first heat dissipation fin 5.

[0040] Please see Figure 3 , Figures 8-9 The guiding component is connected to the connecting frame 7. When the second heat dissipation fin 6 is bent, the guiding component can drive the cooled air to flow back to the first heat dissipation fin 5 through the drainage channel. The guiding component includes a guide member 11 disposed on the side of the connecting plate 4 and a tensioning structure connecting the guide member 11 and the connecting frame 7. The guide member 11 can guide the air discharged from the side of the first heat dissipation fin 5 and the second heat dissipation fin 6 into the drainage channel. Specifically, the cross-section of the guide member 11 is U-shaped.

[0041] Under rated operating conditions, the guide 11 is located on the side of the connecting plate 4 away from the first heat dissipation fin 5 (at this time, the guide 11 is completely misaligned with the air outlet). That is, in this state, the air discharged from the end of the fin will not interfere with the guide 11. When the temperature of the fuel cell stack exceeds the threshold, the connecting frame 7 will also drive the guide 11 to move through the traction structure during the bending of the second heat dissipation fin 6, so that the guide 11 can move towards the air outlet. At this time, the guide 11 and the discharged air will produce a collision effect, so that some of the discharged air can enter the drainage channel under the guidance of the guide 11 and be discharged perpendicular to the first heat dissipation fin 5, which will interfere with the air moving along the length of the fin, so that it achieves a turbulent effect and improves the heat exchange effect with the first heat dissipation fin 5 and the second heat dissipation fin 6.

[0042] Furthermore, when the second heat dissipation fin 6 is in a bent state, the airflow generated by the fan 2 will impact its upper surface (see Appendix). Figure 5 At this time, the airflow will change direction and impact the lower surface of the corresponding first heat dissipation fin 5, thereby generating a turbulence effect. As for the lower part of the second heat dissipation fin 6, the first heat dissipation fin 5 located at the lower part can generate airflow perpendicular to its surface, so that under the action of this airflow, the airflow generated by the fan 2 can impact the lower part of the second heat dissipation fin 6. That is, a certain degree of turbulence can be generated on both sides of the second heat dissipation fin 6 and the lower side of the first heat dissipation fin 5, further improving the heat exchange effect.

[0043] Please see Figure 3 , Figure 4 The guide 11 is detachably mounted with a guide frame 13, which is slidably connected to a horizontal shaft 12 disposed on the outer casing 1. The traction structure includes a first convex shaft 701 connecting the connecting frame 7 and a second convex shaft 14 connecting the guide frame 13. The traction structure also includes a lifting member 9 that is slidably connected to the side of the outer shell 1 via a guide structure 10. The lifting member 9 is provided with a drive groove, which is adapted to the first convex shaft 701 and the second convex shaft 14. The drive groove includes a horizontal groove 901 and an inclined groove 902 provided on the lifting member 9. The first convex shaft 701 can slide in the horizontal groove 901, and the second convex shaft 14 can slide in the inclined groove 902.

[0044] During the bending of the second heat dissipation fin 6, the connecting frame 7 is in a state of arc-like motion. In this state, the connecting frame 7 has a tendency to move vertically downward. At this time, the first convex shaft 701 can drive the lifting member 9 to move vertically downward (guided by the guide structure 10). In the initial state, the second convex shaft 14 is at the lower end of the inclined groove 902. When the lifting member 9 moves downward, the second convex shaft 14 can move along the length direction of the inclined groove 902 and cause the second convex shaft 14 to move laterally. At this time, the guide frame 13 will move along the length direction of the horizontal axis 12 and drive the guide member 11 to collide with the exhaust air, thereby guiding some air into the drainage channel.

[0045] When the second heat dissipation fin 6 is reset, the above action will be reversed, causing the guide 11 to retract, so that when the fan 2 rotates at a low speed, the guide 11 will not affect the air exhaust, ensuring that the air can be smoothly exhausted and ensuring heat dissipation stability.

[0046] The temperature detection unit is electrically connected to the electric telescopic rod 8 and the fan 2. When the temperature of the fuel cell stack exceeds the threshold, the temperature detection unit can increase the speed of the fan 2 and control the operation of the electric telescopic rod 8.

[0047] The temperature detection unit is located inside the fuel cell stack. When the temperature of the fuel cell stack exceeds the threshold, the temperature detection unit will control the fan 2 to increase the speed, thereby increasing the air intake, and control the electric telescopic rod 8 to bend the second heat dissipation fin 6, thereby increasing the heat exchange area and generating turbulence of a certain intensity, ensuring that the heat exchange effect is further improved.

[0048] 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.

[0049] 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. A combined dual-temperature zone radiator suitable for fuel cells, comprising: The outer casing has a fan and a liquid cooling device on each side, and the liquid cooling device has two independent circulation channels. Its characteristic is that it further includes: The connecting plate and multiple sets of first heat dissipation fins are equidistantly distributed on the connecting plate. The connecting plate is integrally formed with the liquid cooling device, and a flow channel is provided between the connecting plate and the first heat dissipation fins. The second heat dissipation fins are provided in multiple sets and connected to the connecting plate, and the second heat dissipation fins are in contact with the surface of the corresponding first heat dissipation fins. A driving structure is connected to the end of the second heat sink fin away from the connecting plate, and the driving structure can drive the second heat sink fin to bend. A guiding component, connected to the driving structure, enables the cooled air to flow back to the first heat dissipation fins via the drainage channel when the second heat dissipation fins are bent. A temperature detection unit is electrically connected to the drive structure and the fan. The temperature detection unit can increase the fan speed and control the drive structure when the temperature of the fuel cell stack exceeds a threshold. The drive structure includes a frame rotatably connected to one end of the second heat sink fin away from the connecting plate, and an electric telescopic rod rotatably mounted on the outer casing. The actuating end of the electric telescopic rod is rotatably connected to the frame. The electric telescopic rod is electrically connected to the temperature detection unit; The airflow channel includes multiple sets of air guide channels disposed on the connecting plate and multiple sets of air supply channels disposed on the first heat dissipation fin. Multiple sets of air supply holes perpendicular to the surface of the first heat dissipation fin and connected to the outside are equidistantly disposed on the air supply channels. The guiding assembly includes a guide member disposed on the side of the connecting plate and a tensioning structure connecting the guide member and the connecting frame. The guide member is capable of guiding the air discharged from the side of the first heat dissipation fin and the second heat dissipation fin into the drainage channel.

2. A combined dual-temperature zone radiator suitable for fuel cells according to claim 1, characterized in that, The fan is provided with a distribution plate on the side facing the connecting plate. The distribution plate is provided with multiple sets of concentric annular distribution rings. Each set of annular distribution rings is composed of multiple sets of through holes with the same diameter. The diameter of the through holes on the outer annular distribution ring is smaller than the diameter of the through holes on the inner annular distribution ring.

3. A combined dual-temperature zone radiator suitable for fuel cells according to claim 1, characterized in that, The cross-section of the guide has a U-shaped structure.

4. A combined dual-temperature zone radiator suitable for fuel cells according to claim 1, characterized in that, The guide is detachably mounted with a guide frame, which is slidably connected to a horizontal axis disposed on the outer casing.

5. A combined dual-temperature zone radiator suitable for fuel cells according to claim 4, characterized in that, The traction structure includes a first convex shaft connecting the connecting frame and a second convex shaft connecting the guide frame; The traction structure also includes a lifting component that is slidably connected to the side of the outer shell via a guide structure. The lifting component is provided with a drive groove, which is adapted to the first convex shaft and the second convex shaft.

6. A combined dual-temperature zone radiator suitable for fuel cells according to claim 5, characterized in that, The drive groove includes a horizontal groove and an inclined groove disposed on the lifting member. The first convex shaft can slide in the horizontal groove, and the second convex shaft can slide in the inclined groove.

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