Telescopic spiral expansion type radiator fin and radiating method thereof

Abstract

The invention relates to the technical field of radiators, in particular to a telescopic spiral expansion type radiator fin and a radiating method thereof, and the radiator fin comprises a frame, a plurality of fin assemblies and a control system; each fin assembly comprises a driving mechanism, a shape memory alloy elastic piece, a rotating shaft, cooling fins, a heat conduction mechanism and a temperature sensor. When the temperature of the heat dissipation fins reaches the working condition temperature of the shape memory alloy elastic piece, the shape memory alloy elastic piece is heated to deform, and the heat dissipation fins are preliminarily unfolded; the control system is in signal connection with the temperature sensor and the driving mechanism, and the control system dynamically controls starting, stopping and steering of the driving mechanism according to temperature signals of the temperature sensor, so that the cooling fins are unfolded or folded. The radiator has the advantages that a dual-driving mode of the shape memory alloy elastic piece and the driving mechanism is adopted, the loss of the driving mechanism can be reduced, the unfolding length of the radiating fins can be accurately controlled, and the radiating requirements of different temperatures can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat sinks, in particular to a scalable spiral-expanding heat sink fin and a heat dissipation method thereof. BACKGROUND

[0002] The existing heat sink fin technology mainly includes fixed type, spiral type and mechanical telescopic type, but all have significant defects and are difficult to meet the modern high-power and variable working condition heat dissipation requirements.

[0003] The fixed heat dissipation fin has a non-adjustable heat dissipation area, and the fin is always in the maximum expanded state, so that the heat dissipation capacity is excessive at low load, resulting in energy waste. Moreover, the fixed fin spacing cannot optimize the air turbulence, and local hot spots are easily formed under high temperature conditions.

[0004] The spiral heat dissipation fin has a spiral structure that can extend the air flow path (improve the heat exchange coefficient), but cannot dynamically adjust the expanded area according to temperature changes, resulting in insufficient heat dissipation capacity when the temperature rises sharply. The spiral structure increases the wind resistance at low temperature, reducing the system efficiency. The manufacturing complexity is high.

[0005] The mechanical telescopic heat dissipation fin relies on guide rails or hinge mechanisms to realize telescoping, resulting in a bulky structure that is difficult to integrate into a compact space, and the moving parts are prone to jamming due to dust accumulation or thermal deformation. An additional motor is required for driving, and the power consumption accounts for 5%~10% of the total system energy consumption. SUMMARY

[0006] Therefore, the present application aims to provide a scalable spiral-expanding heat sink fin and a heat dissipation method thereof, which automatically adjusts the heat dissipation area through temperature triggering to balance the heat dissipation efficiency and energy consumption.

[0007] To achieve the above object, the technical scheme of the present application is realized as follows: A scalable spiral-expanding heat radiator fin comprises a frame, a plurality of fin assemblies and a control system; the plurality of fin assemblies are uniformly distributed on the frame; each fin assembly comprises a driving mechanism, a shape memory alloy elastic member, a rotating shaft, a heat dissipation fin, a heat conduction mechanism and a temperature sensor; the heat conduction mechanism is arranged on the frame; the rotating shaft is rotatably sleeved on the outside of the heat conduction mechanism; the fixed end of the driving mechanism is connected with the frame, and the output end of the driving mechanism is connected with the rotating shaft; the heat dissipation fin is wound on the rotating shaft; the shape memory alloy elastic member is arranged in the corresponding first connecting hole, the root of the shape memory alloy elastic member is wound on the output end of the driving mechanism, and the free end of the shape memory alloy elastic member abuts against the inner wall of the first connecting hole; the heat conduction mechanism is used for conducting heat to the heat dissipation fin; when the temperature of the heat dissipation fin reaches the working temperature of the shape memory alloy elastic member, the shape memory alloy elastic member is deformed by heat, the rotating shaft is driven to rotate by the output end of the driving mechanism, and the heat dissipation fin is preliminarily unfolded; the temperature sensor is arranged at the liquid outlet of the heat conduction mechanism and is used for detecting the temperature of the liquid at the liquid outlet; the control system is signal-connected with the temperature sensor and the driving mechanism, the control system dynamically controls the start-stop and steering of the driving mechanism according to the temperature signal of the temperature sensor, so that the unfolding or contraction of the heat dissipation fin is realized.

[0008] Further, when the temperature sensor detects that the temperature of the liquid is greater than or equal to the first preset temperature, the control system controls the driving mechanism to drive the rotating shaft to rotate, so that the heat dissipation fin is further unfolded until the unfolded area of the heat dissipation fin meets the heat dissipation requirement of the heat conduction mechanism; when the temperature of the heat conduction mechanism is lower than the phase transition temperature of the shape memory alloy elastic member, the shape memory alloy elastic member returns to the initial state; at the same time, the control system controls the driving mechanism to drive the rotating shaft to rotate reversely, so that the heat dissipation fin is wound on the rotating shaft.

[0009] Further, the frame comprises a frame body and a driving mechanism mounting rack; the frame body is a rectangular frame and has mutually parallel first and second side edges; a plurality of first connecting holes are arranged on the first side edge, and a plurality of second connecting holes are arranged on the second side edge; the axis of each second connecting hole is located on the same straight line as the axis of the corresponding first connecting hole; each fin assembly 2 is connected to the frame through the corresponding first and second connecting holes; the driving mechanism mounting rack is connected to the outside of the first side edge of the frame body; the driving mechanism mounting rack is uniformly provided with mounting holes, the fixed end of the driving mechanism is connected to the driving mechanism mounting rack through the corresponding mounting hole, and the output end of the driving mechanism is connected to one end of the rotating shaft through the mounting hole and the first connecting hole in sequence; one end of the heat conduction mechanism away from the driving mechanism is fixed to the frame body through the second connecting hole.

[0010] Further, the shape memory alloy elastic member is a shape memory alloy spring, and the material thereof is nickel-titanium alloy.

[0011] Further, the phase transition temperature of the shape memory alloy elastic member is 40-80 DEG C.

[0012] Further, the surface of the heat dissipation fin is provided with a nano radiation coating, and the circumferential edge of the heat dissipation fin is coated with a flexible graphene layer or a polyimide reinforced layer.

[0013] Further, the heat conduction mechanism comprises a sleeve and a conduction liquid pipe, the sleeve is sleeved outside the conduction liquid pipe, and a heat-conducting material is filled between the sleeve and the conduction liquid pipe.

[0014] Further, the conduction liquid pipe has a U-shaped structure, comprising a first straight pipe and a second straight pipe parallel to each other, and a semicircular connecting pipe connecting the first straight pipe and the second straight pipe; the open end of one of the first straight pipe and the second straight pipe is the liquid inlet, and the open end of the other is the liquid outlet; the first straight pipe and the second straight pipe extend along the axis direction of the rotating shaft, and the semicircular connecting pipe is located at one end of the rotating shaft close to the drive.

[0015] A heat dissipation method of a telescopic spiral-expanding heat dissipation fin, which is realized by using the telescopic spiral-expanding heat dissipation fin, comprises the following steps: S1: The temperature sensor monitors the liquid temperature of the liquid outlet of the heat conduction mechanism in real time, and transmits the temperature signal to the control system.

[0016] S2: When the temperature of the heat dissipation fin reaches the working temperature of the shape memory alloy elastic member, the rotating shaft is driven to rotate by the output end of the driving mechanism, so that the heat dissipation fin is preliminarily expanded.

[0017] S3: When the liquid temperature detected by the temperature sensor is greater than or equal to the first preset temperature, the control system controls the driving mechanism to drive the rotating shaft to rotate, so that the heat dissipation fin is further expanded, until the expansion area of the heat dissipation fin meets the heat dissipation demand of the heat conduction mechanism.

[0018] S4: When the temperature of the heat conduction mechanism is lower than the phase transition temperature of the shape memory alloy elastic member, the shape memory alloy elastic member returns to the initial state; at the same time, the control system controls the driving mechanism to reversely rotate the rotating shaft, so that the heat dissipation fin is wound on the rotating shaft.

[0019] Further, in step S3, the control system adjusts the rotation angle of the rotating shaft by the driving mechanism based on the difference between the temperature signal detected by the temperature sensor and the preset temperature value, and then adjusts the expansion length and expansion area of the heat dissipation fin by using the PID control algorithm.

[0020] Compared with the prior art, the application can achieve the following beneficial effects: 1) By winding the heat dissipation fins on the rotating shaft, the heat dissipation fins can be expanded and curled. When the heat dissipation fins are expanded, the heat dissipation area is significantly increased. At the same time, the surface of the heat dissipation fins is coated with a nano-radiation coating to improve the heat dissipation efficiency. The circumferential edge of the heat dissipation fins is coated with a flexible graphene or polyimide reinforcement layer to prevent material rupture caused by repeated curling of the heat dissipation fins.

[0021] 2) The winding design of the heat dissipation fins can reduce the installation space and can be suitable for space-limited occasions.

[0022] 3) Dual driving mode using shape memory alloy elastic element and driving mechanism. The shape memory alloy elastic element provides initial driving force for the expansion of the heat dissipation fins, reducing the loss of the driving mechanism. At the same time, the control system can accurately control the expansion length of the heat dissipation fins through PID algorithm, which can meet the heat dissipation requirements of different temperatures. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification. The embodiments of the application illustrated in the drawings and their description are presented to explain the application and are not intended to limit the application. In the drawings: Figure 1 is a structural schematic diagram of a scalable spiral expanding heat sink fin provided according to an embodiment of the application; Figure 2 is a structural schematic diagram of a frame provided according to an embodiment of the application; Figure 3 is a structural schematic diagram of a fin assembly provided according to an embodiment of the application; Figure 4 is a structural schematic diagram of a shape memory alloy elastic element in an initial state provided according to an embodiment of the application; Figure 5 is a structural schematic diagram of a shape memory alloy elastic element after being deformed by heat provided according to an embodiment of the application.

[0024] The reference signs include: 1, frame; 11, frame body; 12, driving mechanism mounting bracket; 2, fin assembly; 21, driving mechanism; 22, shape memory alloy elastic element; 23, rotating shaft; 24, heat conduction mechanism; 241, sleeve; 242, conduction liquid pipe; 25, heat dissipation fin; 26, coupling; 27, spacer sleeve. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the application more clear, the application will be further described in detail below with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and do not constitute a limitation on the application.

[0026] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0028] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0029] The present application will be described in detail below with reference to the embodiments.

[0030] As Figures 1 to 5 shown, the heat dissipation fin provided by the embodiment of the present application is a scalable spiral unfolding type heat dissipation fin, which comprises a frame 1, a plurality of fin assemblies 2 and a control system. The plurality of fin assemblies 2 are uniformly distributed on the frame 1.

[0031] The frame 1 comprises a frame body 11 and a driving mechanism mounting rack 12. The frame body 11 is a rectangular frame, and the frame body 11 comprises a first side and a second side parallel to each other. A plurality of first connecting holes are arranged on the first side, and a plurality of second connecting holes are arranged on the second side. The axis of each second connecting hole is on the same straight line as the axis of the corresponding first connecting hole.

[0032] The number of the plurality of first connecting holes and the plurality of second connecting holes is equal to the number of the plurality of fin assemblies 2. Each fin assembly 2 is connected to the frame 1 through the corresponding first connecting hole and second connecting hole.

[0033]

[0033] The driving mechanism mounting frame 12 is connected to the outer side of the first side edge of the frame body 11. The driving mechanism mounting frame 12 is uniformly provided with mounting holes, and the driving mechanism 21 of the fin assembly 2 is connected to the driving mechanism mounting frame 12 through the mounting holes. The output end of the driving mechanism 21 is connected to one end of the rotating shaft 23 of the fin assembly 2 in sequence through the mounting holes, the first connecting holes. The heat conduction mechanism 24 of the fin assembly 2 is connected to the frame body 11 through the second connecting hole away from the driving mechanism 21.

[0034] Each fin assembly 2 includes a driving mechanism 21, a shape memory alloy elastic element 22, a rotating shaft 23, a heat conduction mechanism 24, a heat dissipation fin 25, and a temperature sensor. The rotating shaft 23 is rotatably sleeved on the outside of the heat conduction mechanism 24. The gap between the rotating shaft 23 and the heat conduction mechanism 24 is filled with graphite heat-conducting material, which not only ensures efficient heat transfer but also ensures smooth rotation of the rotating shaft 23 by using the self-lubricating property of graphite. In addition, sealing covers are arranged at the annular gaps at both ends of the rotating shaft 23 and the heat conduction mechanism 24 to seal the annular cavity between them and prevent the internal heat-conducting material from leaking. The fixed end of the driving mechanism 21 is connected to the driving mechanism mounting frame 12 through the mounting holes, and the output end of the driving mechanism 21 is connected to the rotating shaft 23 through a shaft coupling 26.

[0035] The heat dissipation fin 25 is wound around the rotating shaft 23. The shape memory alloy elastic element 22 is arranged in the corresponding first connecting hole, the root of which is wound around the output end of the driving mechanism 21, and the free end of which abuts against the inner wall of the first connecting hole. The heat conduction mechanism 24 is used for conducting heat to the heat dissipation fin 25.

[0036] The end of the heat conduction mechanism 24 away from the driving mechanism 21 is fixed to the frame body 11 through the second connecting hole and connected to an external device for conducting heat from the external device to the heat dissipation fin 25.

[0037] When the rotating shaft 23 rotates, the heat conduction mechanism 24 remains stationary. The temperature sensor is arranged at the liquid outlet of the heat conduction mechanism 24 for detecting the temperature of the liquid at the liquid outlet.

[0038] The rotating shaft 23 and the spacer 27 are integrally machined and formed.

[0039] In this embodiment, the rotating shaft 23 and the spacer 27 are integrally machined and formed.

[0040] When the temperature of the heat dissipation fin 25 reaches the working temperature (40℃~80℃) of the shape memory alloy elastic element 22, the rotating shaft 23 is driven to rotate by the output end of the driving mechanism 21, so that the heat dissipation fin 25 is preliminarily unfolded.

[0041] The control system is signal connected with the temperature sensor and the driving mechanism 21, and the control system dynamically controls the start-stop and steering of the driving mechanism 21 according to the temperature signal of the temperature sensor, so as to realize the expansion or contraction of the heat dissipation fin 25.

[0042] Specifically, when the temperature sensor detects that the temperature of the liquid is greater than or equal to the first preset temperature (50℃), the control system controls the driving mechanism 21 to drive the rotating shaft 23 to rotate, so that the heat dissipation fin 25 is further expanded until the expansion area of the heat dissipation fin 25 meets the heat dissipation demand of the heat conduction mechanism 24.

[0043] When the temperature of the heat conduction mechanism 24 is lower than the phase transition temperature of the shape memory alloy elastic member 22, the shape memory alloy elastic member 22 returns to the initial state, and the driving mechanism 21 drives the rotating shaft 23 to rotate reversely, so that the heat dissipation fin 25 is wound on the rotating shaft 23.

[0044] In the embodiment, the driving mechanism 21 is an electric motor.

[0045] The initial state of the heat dissipation fin 25 is wound on the rotating shaft 23. After the heat dissipation fin 25 is expanded, a rectangular heat dissipation surface is formed. The expansion area of the heat dissipation fin 25 is significantly larger than that in the wound state.

[0046] In the embodiment, the heat dissipation fin 25 is made of flexible high-thermal-conductivity material such as aluminum foil or aluminum-manganese alloy foil, which has both flexibility and rigidity and can maintain the stability of the structure during winding and expansion. The thickness of the heat dissipation fin 25 is about 0.2mm, the width of the heat dissipation fin 25 is 50mm, and the bending stiffness EI is about 2.31N·m 2 .

[0047] The surface of the heat dissipation fin 25 is provided with a nano-radiation coating for enhancing the radiation heat dissipation capacity. The circumferential edge of the heat dissipation fin 25 is covered with a flexible graphene layer or a polyimide reinforcing layer to prevent the heat dissipation fin 25 from being broken due to repeated winding.

[0048] The shape memory alloy elastic member 22 is a shape memory alloy spring, and the material thereof is nickel-titanium alloy. The working temperature of the shape memory alloy elastic member 22 is 40℃-80℃. In the initial state, the shape memory alloy elastic member 22 is wound on the rotating shaft 23 in a pre-tightened spiral form and stores elastic potential energy. When the temperature sensor detects that the ambient temperature rises to the phase transition temperature range of the shape memory alloy elastic member 22, the shape memory alloy elastic member 22 will automatically expand and release its stored elastic potential energy, thereby providing an initial thrust for the heat dissipation fin 25 to reduce the load of the driving mechanism 21.

[0049] The heat conduction mechanism 24 includes a sleeve 241 and a conduction liquid pipe 242, the sleeve 241 is sleeved outside the conduction liquid pipe 242, and a heat-conducting material is filled between the sleeve 241 and the conduction liquid pipe 242 to ensure effective heat transfer. In addition, sealing covers are arranged at the annular gaps at both ends of the sleeve 241 and the conduction liquid pipe 242, for sealing the annular cavity between the two, preventing leakage of the internal heat-conducting material. In this embodiment, the heat-conducting material is graphite.

[0050] The conduction liquid pipe 242 has a U-shaped structure, including a first straight pipe and a second straight pipe parallel to each other, and a semicircular connecting pipe connecting the first straight pipe and the second straight pipe. The open end of one of the first straight pipe and the second straight pipe is the liquid inlet, and the open end of the other is the liquid outlet. The first straight pipe and the second straight pipe extend along the axis direction of the rotating shaft 23, and the semicircular connecting pipe is located at one end of the rotating shaft 23 close to the driving mechanism 21.

[0051] Heat is conducted from the conduction liquid pipe 242 to the sleeve 241 through the heat-conducting material, then to the rotating shaft 23 through the sleeve 241, and finally to the root of the heat dissipation fin 25 through the rotating shaft 23, and further to the surface of the heat dissipation fin 25.

[0052] A heat dissipation method for a retractable spiral unfolding type heat dissipation fin, which is realized by using the above-mentioned retractable spiral unfolding type heat dissipation fin, comprising the following steps: S1: Real-time monitoring of the liquid temperature at the liquid outlet of the heat conduction mechanism 24 by a temperature sensor, and transmitting the temperature signal to the control system.

[0053] S2: When the temperature of the heat dissipation fin 25 reaches the working temperature of the shape memory alloy elastic member 22, the rotating shaft 23 is driven to rotate by the output end of the driving mechanism 21, so that the heat dissipation fin 25 is initially unfolded.

[0054] S3: When it is detected that the temperature is greater than or equal to the first preset temperature, the control system controls the driving mechanism 21 to drive the rotating shaft 23 to rotate, so that the heat dissipation fin 25 is further unfolded, until the unfolded area of the heat dissipation fin 25 meets the heat dissipation demand of the heat conduction mechanism 24.

[0055] Specifically, the control system adjusts the rotation angle of the rotating shaft 23 by the driving mechanism 21 based on the difference between the temperature signal of the temperature sensor and the preset temperature value (corresponding to the target cooling temperature of the heat conduction mechanism 24), and then adjusts the unfolded length and unfolded area of the heat dissipation fin 25 by PID algorithm. In this embodiment, the preset temperature value is 40℃.

[0056] S4: When the temperature of the heat conduction mechanism 24 is lower than the phase transition temperature of the shape memory alloy elastic member 22, the shape memory alloy elastic member 22 returns to the initial state. At the same time, the control system drives the mechanism 21 to rotate the rotating shaft 23 reversely, so that the heat dissipation fins 25 are rewound on the rotating shaft 23.

[0057] The above detailed description does not constitute a limitation on the protection scope of the present application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A retractable spiral-deployable radiator fin, characterized in that, include: The frame, multiple fin assemblies, and a control system are provided; the frame is provided with multiple first connection holes. Multiple fin assemblies are evenly distributed on the frame; each fin assembly includes a drive mechanism, a shape memory alloy elastic element, a rotating shaft, heat dissipation fins, a heat conduction mechanism, and a temperature sensor; The heat conduction mechanism is mounted on the frame; the rotating shaft is rotatably sleeved on the outside of the heat conduction mechanism; the fixed end of the driving mechanism is connected to the frame, and the output end of the driving mechanism is connected to the rotating shaft; the heat dissipation fins are wound around the rotating shaft; the shape memory alloy elastic element is disposed in the corresponding first connecting hole, its root is wound around the output end of the driving mechanism, and its free end abuts against the inner wall of the first connecting hole; the heat conduction mechanism is used to conduct heat to the heat dissipation fins. When the temperature of the heat dissipation fins reaches the operating temperature of the shape memory alloy elastic element, the shape memory alloy elastic element deforms due to heat, and drives the rotating shaft to rotate through the output end of the drive mechanism, so that the heat dissipation fins are initially unfolded. The temperature sensor is located at the liquid outlet of the heat conduction mechanism and is used to detect the liquid temperature at the liquid outlet. The control system is connected to the temperature sensor and the drive mechanism via signal connection. The control system dynamically controls the start, stop and direction of the drive mechanism based on the temperature signal from the temperature sensor, thereby enabling the heat dissipation fins to expand or contract.

2. The retractable spiral-deployable radiator fins according to claim 1, characterized in that, When the temperature sensor detects that the temperature of the liquid is greater than or equal to the first preset temperature, the control system controls the drive mechanism to drive the rotating shaft to rotate, so that the heat dissipation fins are further expanded until the expanded area of ​​the heat dissipation fins meets the heat dissipation requirements of the heat conduction mechanism. When the temperature of the heat conduction mechanism is lower than the phase transition temperature of the shape memory alloy elastic element, the shape memory alloy elastic element returns to its initial state; at the same time, the control system controls the drive mechanism to drive the rotating shaft to rotate in the opposite direction, so that the heat dissipation fins are wound around the rotating shaft.

3. The retractable spiral-deployable radiator fins according to claim 1, characterized in that, The frame includes a frame body and a drive mechanism mounting bracket; the frame body is a rectangular frame with a first side and a second side that are parallel to each other; a plurality of first connecting holes are provided on the first side, and a plurality of second connecting holes are provided on the second side; the axis of each second connecting hole is on the same straight line as the axis of the corresponding first connecting hole; each fin assembly is connected to the frame through the corresponding first connecting hole and second connecting hole; The drive mechanism mounting bracket is connected to the outer side of the first side of the frame body; the drive mechanism mounting bracket is evenly provided with mounting holes, and the fixed end of the drive mechanism is connected to the drive mechanism mounting bracket through the corresponding mounting holes; The output end of the drive mechanism passes through the mounting hole and the first connecting hole in sequence and is connected to one end of the rotating shaft; the end of the heat conduction mechanism away from the drive mechanism is fixed to the frame body through the second connecting hole.

4. The retractable spiral-deployable radiator fins according to claim 1, characterized in that, The shape memory alloy elastic element is a shape memory alloy spring, and its material is nickel-titanium alloy.

5. The retractable spiral-deployable radiator fins according to claim 4, characterized in that, The operating temperature of the shape memory alloy elastic component is 40℃~80℃.

6. The retractable spiral-deployable radiator fins according to claim 1, characterized in that, The surface of the heat dissipation fins is provided with a nano-radiation coating, and the circumferential edges of the heat dissipation fins are covered with a flexible graphene layer or a polyimide reinforcement layer.

7. The retractable spiral-deployable radiator fins according to claim 1, characterized in that, The heat conduction mechanism includes a sleeve and a conductive liquid pipe. The sleeve is fitted over the conductive liquid pipe, and the space between the sleeve and the conductive liquid pipe is filled with a heat-conducting material.

8. The retractable spiral-deployable radiator fins according to claim 7, characterized in that, The conductive fluid tube has a U-shaped structure, including a first straight tube and a second straight tube that are parallel to each other, and a semi-circular connecting tube that connects the first straight tube and the second straight tube; The open end of one of the first straight pipe and the second straight pipe is the liquid inlet, and the open end of the other is the liquid outlet; The first straight tube and the second straight tube extend along the axial direction of the rotating shaft, and the semi-circular connecting tube is located at one end of the rotating shaft near the driving mechanism.

9. A heat dissipation method for a retractable spiral-deployable radiator fin, implemented using the retractable spiral-deployable radiator fin as described in any one of claims 1-8, characterized in that, Includes the following steps: S1: The temperature sensor monitors the liquid temperature at the outlet of the heat conduction mechanism in real time and transmits the temperature signal to the control system; S2: When the temperature of the heat dissipation fins reaches the operating temperature of the shape memory alloy elastic element, the rotating shaft is driven to rotate through the output end of the drive mechanism, so that the heat dissipation fins are initially deployed. S3: When the liquid temperature detected by the temperature sensor is greater than or equal to the first preset temperature, the control system controls the drive mechanism to drive the rotating shaft to rotate, so that the heat dissipation fins are further expanded until the expanded area of ​​the heat dissipation fins meets the heat dissipation requirements of the heat conduction mechanism. S4: When the temperature of the heat conduction mechanism is lower than the phase transition temperature of the shape memory alloy elastic element, the shape memory alloy elastic element returns to its initial state; at the same time, the control system controls the drive mechanism to rotate the rotating shaft in the opposite direction, so that the heat dissipation fins are wound around the rotating shaft.

10. The heat dissipation method for retractable spiral-deployable radiator fins according to claim 9, characterized in that, In step S3, the control system uses a PID control algorithm to adjust the rotation angle of the rotating shaft through the drive mechanism based on the difference between the temperature signal detected by the temperature sensor and the preset temperature value, thereby adjusting the unfolded length and unfolded area of ​​the heat dissipation fins.

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