CN-121985518-A - Dustproof and dampproofing flexible drive heat abstractor

CN121985518ACN 121985518 ACN121985518 ACN 121985518ACN-121985518-A

Abstract

The invention discloses a dustproof and dampproof flexible driving heat dissipating device which comprises a mounting base, a heat dissipating cover plate, driving arms and driving connecting rods, wherein heat dissipating holes are formed in the mounting base, the heat dissipating cover plate is used for covering or opening the heat dissipating holes, the mounting base is rotationally connected with the heat dissipating cover plate through at least two rotary connecting structures and forms a parallelogram structure, the mounting base is in transmission connection with the heat dissipating cover plate through a U-shaped driving arm, one end of the driving arm is fixedly connected with the mounting base, and the other end of the driving arm is fixedly connected with the driving connecting rods. According to the invention, illumination and heat can drive the CNT-Nafion/PE double-layer driver to deform and cause the radiating hole to be opened or closed, the projection on the mounting base when the radiating cover plate is opened and the projection on the mounting base when the radiating cover plate is closed can completely cover the radiating hole, and a macroscopic large-amplitude bending stroke can be generated by using a very small temperature change, so that the opening requirement of the radiating channel opening is met.

Inventors

CHANG LONGFEI
HAN SHUAI
HUANG GUOXING
HU YING

Assignees

合肥工业大学

Dates

Publication Date: 20260505
Application Date: 20260310

Claims (10)

1. A dustproof and dampproof flexible driving heat dissipating device is characterized by comprising a mounting base, a heat dissipating cover plate, a driving arm and a driving connecting rod, wherein the mounting base is provided with heat dissipating holes, the heat dissipating cover plate is used for covering or opening the heat dissipating holes, the mounting base is rotationally connected with the heat dissipating cover plate through at least two rotary connecting structures and forms a parallelogram structure, the mounting base is in transmission connection with the heat dissipating cover plate through a U-shaped driving arm, one end of the driving arm is fixedly connected with the mounting base, the other end of the driving arm is fixedly connected with the driving connecting rod, one end of the heat dissipating cover plate, facing the mounting base, is provided with a limit chute matched with the driving connecting rod in a sliding mode, the PE side of the driving arm is arranged away from the heat dissipating cover plate, when the set heat is reached, the driving arm can be driven to deform and enable the heat dissipating holes to be opened or closed, projection located on the mounting base when the heat dissipating cover plate is opened can completely cover the heat dissipating holes, a groove is further formed in the mounting base, and a limit expansion block connected with the moisture absorption expansion block is arranged in the groove, when the set humidity is reached, the moisture absorption expansion block can expand and drive the lock tongue to extend into a plane above the rotary connecting structure and the limit acting force of the driving arm to the temperature is larger than the limit acting force of the driving arm.
2. A flexible driving heat sink as claimed in claim 1, wherein the driving arm is a CNT-Nafion/PE dual layer driver or an AB-Nafion/PE driver or an MXene/PE driver.
3. The dustproof and dampproof flexible driving heat dissipating device according to claim 1, wherein the driving arm comprises a first transverse connecting section, a second transverse connecting section and at least one longitudinal connecting section, the first transverse connecting section is fixedly connected with the second transverse connecting section through the longitudinal connecting section, the first transverse connecting section and the second transverse connecting section are all arranged along the length direction of the heat dissipating cover plate, and the longitudinal connecting section is arranged along the width direction of the heat dissipating cover plate.
4. The dustproof and moistureproof flexible driving heat dissipating device according to claim 1, wherein the dustproof heat dissipating device is arranged at the top of the electronic device housing, the top wall of the electronic device housing forms a mounting base, and the size of the heat dissipating cover plate is larger than the size of the heat dissipating hole.
5. The dustproof and moistureproof flexible driving heat dissipating device according to claim 4, wherein the rotary connecting structure comprises supporting connecting rods, the two supporting connecting rods are respectively arranged at two opposite side edges of the heat dissipating hole, the bottom ends of the supporting connecting rods are rotatably connected to the mounting base through rotating shafts, and the top ends of the supporting connecting rods are rotatably connected with the lower surface of the heat dissipating cover plate through upper fixing blocks.
6. A dustproof and moistureproof flexible driving heat sink according to claim 1, wherein the dustproof and moistureproof heat sink is provided on the periphery of the electronic equipment housing or the automobile, and the side wall of the electronic equipment housing forms a mounting base.
7. The flexible driving heat sink as defined in claim 6, wherein the rotary connection structure comprises hinges, both of which are disposed at the upper portions of the mounting holes.
8. The dustproof and moistureproof flexible driving heat dissipating device according to claim 2, wherein the CNT-Nafion/PE dual-layer driver comprises an active layer and a passive layer, the active layer is a PE composite film, and the passive layer is a CNT-Nafion film.
9. The dustproof and moistureproof flexible driving heat dissipating device according to claim 1, wherein the heat dissipating cover plate is in an elliptical streamline structure, a sealing ring or a sealing cushion layer is arranged at one end of the heat dissipating cover plate facing the mounting base, the heat dissipating hole is positioned at the center of the mounting base, two rectangular frames are fixedly connected to the bottom of the heat dissipating cover plate, and limiting sliding grooves are formed in the centers of the two rectangular frames.
10. The dustproof and dampproof flexible driving heat dissipating device according to claim 1, wherein the set thermal opening threshold is that the internal temperature of the electronic equipment reaches 35 ℃ to 40 ℃, the heat dissipating cover plate is partially opened, when the internal temperature of the electronic equipment corresponding to the set thermal is 45 ℃ or above, the heat dissipating cover plate is fully opened, and the set humidity is that the ambient relative humidity reaches 75% RH to 85% RH.

Description

Dustproof and dampproofing flexible drive heat abstractor Technical Field The invention relates to the technical field of heat management and flexible drivers, in particular to a dustproof and dampproof flexible driving heat dissipation device. Background With rapid development of electronic information technology, integration level and power density of electronic devices (such as outdoor communication cabinets, photovoltaic junction boxes, high-power computing devices and the like) are continuously improved, and heat dissipation problem has become a key factor for limiting performance and service life of the electronic devices. At present, the most common heat dissipation mode is to provide heat dissipation holes or shutters on the equipment shell, and take away heat by natural convection or forced air cooling. However, the open heat dissipation structure has natural contradiction between heat dissipation and protection, namely, in order to improve heat dissipation efficiency, the opening area needs to be increased as much as possible, but long-term open holes easily cause dust accumulation, moisture invasion and even insect entrance, thereby causing short circuit or corrosion of a circuit and seriously affecting the reliability of equipment. In order to solve the above contradiction, the following two schemes are generally adopted in the prior art: firstly, a fixed dust screen or a labyrinth air duct is adopted, and the mode can prevent foreign matters to a certain extent, but greatly increases flow resistance, reduces heat dissipation efficiency and cannot be dynamically adjusted according to equipment temperature; and secondly, an active opening and closing device is adopted, for example, a motor, an electromagnet or a shape memory alloy spring is used for driving the opening and closing of the shutter. When a temperature rise is detected, the controller drives the motor to open the shutter. However, the active system has a complex structure, needs to be provided with an additional temperature sensor, a control circuit and a power supply, not only increases the cost and the volume of the system, but also can fail when power is off or the sensor fails, and has high maintenance cost. In recent years, flexible intelligent materials (such as electrically actuated polymers, photo-thermal response composite materials and the like) based on external stimulus (such as light, heat and electricity) response are receiving attention in the field of bionic driving because of the advantages of passive driving, light weight, quick response and the like. However, the direct use of sheet-like smart materials for the driving of heat dissipating cover plates still faces challenges: (1) The traditional cantilever beam type driving structure has small tail end displacement, is difficult to drive a large-opening radiating channel and has insufficient ventilation quantity; (2) The mechanical property is insufficient, the rigidity of the flexible material is low under high temperature or large deformation, and the flexible material is difficult to stably support a heavy cover plate or resist external wind pressure; (3) The structure integration level is low, and the existing design often lacks an effective mechanical amplifying mechanism, so that the energy conversion efficiency is low and the action is slow. Therefore, there is a need to develop an adaptive heat dissipating device with a simple structure, no need of external sensors and complex circuits, capable of automatically adjusting the opening and closing angle according to environmental changes, and having a large driving stroke and structural stability. Disclosure of Invention The invention aims to solve the technical problem of providing a dustproof and dampproof self-adaptive heat dissipation device. The invention solves the technical problems by the following technical means that the dustproof and dampproof flexible driving heat dissipation device comprises a mounting base, a heat dissipation cover plate, a driving arm and a driving connecting rod, wherein the mounting base is provided with a heat dissipation hole, the heat dissipation cover plate is used for covering or opening the heat dissipation hole, the mounting base is rotationally connected with the heat dissipation cover plate through at least two rotary connection structures and forms a parallelogram structure, the mounting base is in transmission connection with the heat dissipation cover plate through a U-shaped driving arm, one end of the driving arm is fixedly connected with the mounting base, the other end of the driving arm is fixedly connected with the driving connecting rod, one end of the heat dissipation cover plate facing the mounting base is provided with a limit chute which is matched with the driving connecting rod in a sliding way, the PE side of the driving arm is arranged away from the heat dissipation cover plate, the driving arm can drive the driving arm to deform and enable the heat d