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CN-121996041-A - Self-adaptive air duct radiator based on shape memory alloy

CN121996041ACN 121996041 ACN121996041 ACN 121996041ACN-121996041-A

Abstract

The invention relates to the technical field of heat dissipation, in particular to a self-adaptive air duct radiator based on a shape memory alloy, which comprises a radiator main body, at least one fan, at least one self-adaptive air guide mechanism and at least one shape memory alloy driving unit, wherein the shape memory alloy driving unit is made of an alloy material with a thermally induced shape memory effect, a first end of the shape memory alloy driving unit is fixedly connected with a temperature response part of the radiator main body, and a second end of the shape memory alloy driving unit is in transmission connection with the self-adaptive air guide mechanism. When the temperature of the temperature response part reaches or exceeds the preset phase change trigger temperature, the shape memory alloy driving unit generates preset deformation from the first shape to the second shape, and the self-adaptive air guide mechanism is driven to move from the first position to the second position in the air duct by driving force generated by the deformation, so that the local geometric shape and air flow guide of the air duct are changed.

Inventors

  • ZHANG JIANJIE

Assignees

  • 东莞市万亨达热传科技有限公司

Dates

Publication Date
20260508
Application Date
20260128

Claims (10)

  1. 1. A shape memory alloy-based adaptive air duct radiator, comprising: The radiator comprises a radiator body, a heat-conducting base, a plurality of heat pipes and a heat radiation fin group, wherein the heat-conducting base is used for contacting a heat source, the heat pipes are thermally connected with the heat-conducting base, the heat radiation fin group is thermally connected with the heat pipes, and an air channel through which air flows are formed in the heat radiation fin group; at least one fan, the said fan is set up in one side of the said heat-dissipating fin group, is used for forcing the air supply to the said wind channel; the self-adaptive air guide mechanism is movably arranged in the air duct; And at least one shape memory alloy drive unit; the shape memory alloy driving unit is made of an alloy material with a thermal shape memory effect, a first end of the shape memory alloy driving unit is fixedly connected to a temperature response part of the radiator main body, and a second end of the shape memory alloy driving unit is in transmission connection with the self-adaptive air guide mechanism; The shape memory alloy driving unit is configured to generate preset deformation from a first shape to a second shape when the temperature of the temperature response part reaches or exceeds the preset phase change trigger temperature of the temperature response part, and drive the self-adaptive air guide mechanism to move from a first position to a second position in the air duct through driving force generated by the deformation, so that the local geometric shape and air flow guide of the air duct are changed.
  2. 2. The shape memory alloy-based adaptive air duct radiator as set forth in claim 1, wherein the adaptive air guiding mechanism comprises an air deflector, a rotating shaft and a transmission arm; The air deflector is rotatably connected between adjacent fixed fins in the radiating fin group through the rotating shaft; One end of the transmission arm is fixedly connected with the air deflector or the rotating shaft, and the other end of the transmission arm is connected with the second end of the shape memory alloy driving unit; The deformation of the shape memory alloy driving unit is converted into the rotary motion of the air deflector around the rotating shaft through the transmission arm.
  3. 3. The shape memory alloy-based adaptive air duct radiator as set forth in claim 2, wherein when the temperature of the temperature responsive portion is lower than the phase transition trigger temperature, the air deflector is at the first position, and an included angle between a plate surface extending direction of the air deflector and a main flow direction of the fan air supply is smaller than 30 degrees, and the air deflector is in a downstream state; When the temperature of the temperature response part reaches or exceeds the phase change trigger temperature, the air deflector moves to the second position, and at the moment, an included angle between the extending direction of the plate surface of the air deflector and the main flow direction of the air supply of the fan is between 45 degrees and 90 degrees, so that the air deflector is in a turbulent flow or diversion state.
  4. 4. The adaptive air duct radiator based on the shape memory alloy according to claim 1, wherein the shape memory alloy driving unit is a shape memory alloy spring or a shape memory alloy sheet cantilever beam; When the self-adaptive air guide mechanism is a shape memory alloy spring, the first end of the self-adaptive air guide mechanism is fixed on the heat conduction base or is adjacent to the first-stage fins of the heat conduction base, the second end of the self-adaptive air guide mechanism is connected with the self-adaptive air guide mechanism through a stay wire or a connecting rod, and when the temperature rises, the spring contracts to generate tension; When the cantilever beam is a shape memory alloy thin sheet, the first end of the cantilever beam is rigidly fixed on a specific fin in the middle of the radiating fin group, the second end is in a free state and directly abuts against or is connected with the self-adaptive air guide mechanism, and when the temperature rises, the thin sheet bends to one side to generate displacement.
  5. 5. The adaptive air duct radiator based on the shape memory alloy according to claim 1, wherein the temperature response part is one or a combination of the following positions: a) The heat conduction base; b) At least one row of heat dissipation fins closest to the CPU heat source is defined as a near heat source fin area; c) At least one row of the heat radiation fins positioned in the middle of the heat radiation fin group or at the downstream of the air flow is defined as a temperature monitoring fin area; wherein the phase transition trigger temperature of the shape memory alloy drive unit disposed in the near heat source fin region is higher than the phase transition trigger temperature of the shape memory alloy drive unit disposed in the temperature monitoring fin region.
  6. 6. The shape memory alloy based adaptive air duct radiator as set forth in claim 1, wherein said heat radiation fin group is divided into at least two areas in the air flow direction and/or the vertical direction, a fixed air duct area and an adaptive variable air duct area; The self-adaptive air guide mechanism and the shape memory alloy driving unit are integrally arranged in the self-adaptive variable air channel area; the fixed air duct area is not provided with a movable air guide structure.
  7. 7. The adaptive air duct radiator based on shape memory alloy according to claim 1, further comprising an elastic reset element; One end of the elastic reset element is fixed, the other end of the elastic reset element is connected with the self-adaptive air guide mechanism, and the direction of elastic restoring force provided by the elastic reset element is opposite to the direction of the self-adaptive air guide mechanism driven by the shape memory alloy driving unit to move at high temperature; When the temperature of the temperature response part is reduced to be lower than the phase change trigger temperature, the driving force of the shape memory alloy driving unit is weakened or eliminated, and the elastic reset element drives the self-adaptive air guide mechanism to recover from the second position to the first position.
  8. 8. The adaptive air duct radiator based on the shape memory alloy according to claim 2, wherein the transmission arm is of a lever structure and comprises a fulcrum, a power arm and a resistance arm; the pivot is fixed on the radiating fins or the radiator frame; the shape memory alloy driving unit is connected to the power arm; The resistance arm is connected with the air deflector or the rotating shaft; The length of the power arm is larger than that of the resistance arm, so that the tiny displacement generated by the shape memory alloy driving unit is amplified to be larger in rotation angle of the air deflector.
  9. 9. The adaptive duct radiator based on shape memory alloy of claim 1, wherein the shape memory alloy driving unit is made of nickel-titanium-based shape memory alloy, and the austenite phase transition end temperature is set between 45 ℃ and 75 ℃ to adapt to the working temperature range of the CPU radiator.
  10. 10. The shape memory alloy-based adaptive air duct radiator as set forth in claim 1, wherein the number of the adaptive air guide mechanism and the number of the shape memory alloy driving units are plural, and the adaptive air guide mechanism and the shape memory alloy driving units are distributed at different positions of the radiating fin group in an array form; The phase change trigger temperature of at least the first group of driving units is different from the phase change trigger temperature of the second group of driving units, so that the radiator can adjust the air duct form in stages and areas according to different temperature thresholds.

Description

Self-adaptive air duct radiator based on shape memory alloy Technical Field The invention relates to the technical field of heat dissipation, in particular to a self-adaptive air duct radiator based on shape memory alloy. Background In the prior art, performance of core processors (CPU, GPU, etc.) of electronic devices such as computers and servers is continuously improved, and power consumption and heat productivity of the core processors are increasingly increased, which provides a serious challenge for a heat dissipation system. Conventional air-cooled radiators generally have a static air duct formed by a fixed set of cooling fins and cooperate with a fan that is constant or whose rotational speed is regulated by PWM signals to perform forced convection heat dissipation. The heat dissipation scheme has obvious limitation that the heat dissipation capacity is basically constant at the specific fan rotating speed, and the air duct structure cannot be dynamically adjusted according to the power consumption and the temperature of the heat source which are changed in real time. In order to cope with possible instantaneous high load and temperature rise, the heat dissipation system is often designed according to the worst working condition, so that the fan is kept at a higher rotating speed for a long time or frequently, continuous pneumatic noise is generated, user experience is affected, and the overall energy consumption of the system is increased. Meanwhile, the fixed air duct structure is difficult to locally optimize aiming at uneven heat flux density on the surface of the chip, and may cause insufficient heat dissipation of part of high-temperature areas. Although some technologies exist for driving the movable air deflector through additional electric control elements (such as micro motors and electromagnets), the schemes introduce complex circuits, control modules and moving parts, increase the system cost, failure rate and electromagnetic interference risk, and the active control logic still needs to rely on external sensors and power supply, so that the reliability and the integration level are insufficient. Therefore, there is a need in the industry for a high-efficiency heat dissipation scheme that has a simple structure, is directly responsive, and can adaptively adjust the air duct according to the temperature without external complex control. Disclosure of Invention In order to solve the problems, the self-adaptive air duct radiator based on the shape memory alloy is characterized in that the sliding support frame extending along the axial direction of the carrier roller is arranged on the support underframe, and the sliding groove matched with the sliding support frame is arranged on the sliding connection frame of the carrier roller assembly, so that the whole carrier roller assembly can slide out or push in along the axial direction like a drawer. The self-adaptive air duct radiator based on the shape memory alloy comprises a radiator main body, at least one fan, at least one self-adaptive air guide mechanism and at least one shape memory alloy driving unit, wherein the radiator main body comprises a heat conduction base used for contacting a heat source, a plurality of heat pipes thermally connected with the heat conduction base and a heat radiation fin group thermally connected with the heat pipes, and an air duct through which air flows is formed by the heat radiation fin group; the shape memory alloy driving unit is made of an alloy material with a thermal shape memory effect, a first end of the shape memory alloy driving unit is fixedly connected to a temperature response part of the radiator main body, and a second end of the shape memory alloy driving unit is in transmission connection with the self-adaptive air guide mechanism; The shape memory alloy driving unit is configured to generate preset deformation from a first shape to a second shape when the temperature of the temperature response part reaches or exceeds the preset phase change trigger temperature of the temperature response part, and drive the self-adaptive air guide mechanism to move from a first position to a second position in the air duct through driving force generated by the deformation, so that the local geometric shape and air flow guide of the air duct are changed. The self-adaptive wind guiding mechanism comprises a wind guiding plate, a rotating shaft and a transmission arm; The air deflector is rotatably connected between adjacent fixed fins in the radiating fin group through the rotating shaft; One end of the transmission arm is fixedly connected with the air deflector or the rotating shaft, and the other end of the transmission arm is connected with the second end of the shape memory alloy driving unit; The deformation of the shape memory alloy driving unit is converted into the rotary motion of the air deflector around the rotating shaft through the transmission arm. The further improvement of the scheme i