Efficient air-cooled cold plate for solar-assisted thermoelectric refrigeration

Abstract

According to the efficient air-cooling cold plate for solar-assisted thermoelectric refrigeration, the solar battery packs are installed on the end faces of the fins, heating of most of solar radiation on the air-cooling cold plate can be blocked, and the heat dissipation capacity of the air-cooling cold plate is directly improved. The solar cell panel supplies power to the thermoelectric refrigeration sheet through the storage battery, a self-closed loop is formed, and the economical efficiency of the system is improved. The first-stage thermoelectric refrigeration sheet is used, refrigeration is achieved at the chip cold plate, the temperature gradient limitation of a conventional heat dissipation cold plate is broken through, the use environment temperature of the chip is increased to the environment temperature plus the temperature difference of the refrigeration sheet, and the heat dissipation capacity of the air-cooled cold plate is remarkably improved. The secondary cooling assembly can dissipate heat of the solar battery pack through the fin end face cover plate, it can be guaranteed that the battery piece works at the low working temperature, the working efficiency and reliability of the battery piece are improved, meanwhile, auxiliary heat dissipation is indirectly conducted on the fins of the air-cooling cold plate through the fin end face cover plate, and the heat dissipation efficiency of the air-cooling cold plate is further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic equipment, and in particular relates to a high-efficiency air-cooled cold plate for solar-assisted thermoelectric refrigeration. Background Art

[0002] With the development of information technology, the use of electronic chips is becoming more and more popular, and the chip size is getting smaller and smaller, and the power density is getting higher and higher. Ensuring good heat dissipation of electronic chips is the key to improving system reliability. The technologies commonly used for electronic chip heat dissipation mainly include natural heat dissipation, forced air cooling, liquid cooling, etc. Forced air cooling is widely used in engineering practice because of its strong heat dissipation capacity and simple system structure. Forced air cooling mainly relies on air-cooled cold plates. By processing heat dissipation fins on the metal substrate, the fins are used to transfer the heat of the new chip to the cold air flowing between the fins step by step.

[0003] The temperature of traditional air-cooled cold plates increases step by step from the cold air between the wings to the heat dissipation fins, cold plate substrate, and heat-generating chips. The heat dissipation capacity is limited in places where the ambient temperature is high. The measures to improve the heat dissipation capacity of the cold plate mainly lie in increasing the fin area and increasing the wind speed between the wings. The increase in the fin area is mainly achieved by increasing the fin height and reducing the fin spacing, which will significantly increase the size and weight of the cold plate; increasing the wind speed between the wings requires matching a fan with sufficient pressure head, which is less economical and will significantly increase the operating noise, causing a sharp deterioration in personnel comfort. Therefore, a new way is needed to solve the above problems of air-cooled cold plates and improve the heat dissipation capacity of air-cooled cold plates. Summary of the invention

[0004] In order to solve the problems of limited ambient temperature and limited heat dissipation capacity of existing air-cooled cold plates, the present invention proposes a high-efficiency air-cooled cold plate with solar-assisted thermoelectric refrigeration, which has the characteristics of high ambient temperature, high heat dissipation capacity and good economy.

[0005] The high-efficiency air-cooled cold plate for solar-assisted thermoelectric refrigeration of the present invention is characterized by: comprising an air-cooled frame with fins, a fin end face cover plate covered with a solar cell group, a secondary cooling component installed on the fin end face cover plate close to the fin side, a primary thermoelectric cooling plate with thermal conductive pads crimped on the upper and lower surfaces, and a chip mounting plate 6.

[0006] The ends of the air-cooled skeleton fins are evenly provided with threaded holes, which are used to crimp and fix the fin end cover plates to the fin ends with screws, and a secondary cooling component is installed on the fin end cover plates close to the fin side, and a solar cell group is fixed on the side away from the fin; a frame is provided on the end face of the air-cooled skeleton substrate side, and the frame is used to install a primary thermoelectric cooling sheet and a thermal conductive pad, and the chip mounting plate is fixed to the air-cooled skeleton with screws.

[0007] The fin end cover plate is provided with countersunk through holes and wiring grooves on the side away from the air-cooled skeleton fins. The countersunk through holes 21 correspond one-to-one to the threaded holes on the fins and are used to fix the end cover plate on the fins; the wiring grooves are used for wiring inside the solar cell group. At the same time, the end cover plate is provided with threaded holes on the side close to the air-cooled skeleton fins for fixing the secondary cooling assembly.

[0008] The solar cell group is composed of two or more cells, which are installed in parallel between wiring troughs; the solar cell group absorbs solar energy and converts it into electrical energy, which is stored in the battery through wires.

[0009] The secondary cooling assembly consists of a secondary cold plate, a secondary thermoelectric cooling sheet, a thermally conductive pad attached to the upper and lower surfaces of the secondary cooling sheet, and a screw mounting hole; the screw mounting hole is a countersunk hole, and the secondary cooling sheet is tightly pressed onto the end cover plate by a countersunk screw.

[0010] The size and performance of the secondary cold plate and the secondary thermoelectric cooling sheet are weaker than those of the air-cooled frame and the primary thermoelectric cooling sheet; the cold end of the secondary cooling sheet is close to the end cover plate, and the hot end is close to the secondary cold plate. When working, the end cover plate is cooled, and the heat generated is carried away by the cold air between the wings of the air-cooled frame through the secondary cold plate.

[0011] The first-level thermoelectric cooling chips are evenly distributed throughout the frame, and a gap is left between every two thermoelectric cooling chips for wiring. The gap between the thermoelectric cooling chips is filled with thermal insulation cotton to ensure that the cold end of the first-level cooling chip is completely heat-exchanged with the chip through the chip mounting plate, and the heat is completely taken away by the fins of the air-cooled skeleton 1.

[0012] The height of the frame is determined by the primary thermoelectric cooling sheet and the thermal pad, that is, after the primary thermoelectric cooling sheet and the thermal pad are pressed by the chip mounting board, the compression of the thermal pad is guaranteed to be 20%-30%, and the height of the frame is ensured to be in contact with the chip mounting board 6.

[0013] The air-cooled skeleton, end cover, solar cell group, thermoelectric cooling sheet, chip mounting plate, and secondary cooling assembly are all independent, and the modules are connected by screws; the primary thermoelectric cooling sheet and the secondary cooling sheet are connected to the battery power supply port through wires, and the battery provides the required electricity for work.

[0014] The beneficial effects of the present invention are

[0015] 1. The solar cell group is installed on the end surface of the fin, which can block most of the solar radiation from heating the air-cooled cold plate, and directly improve the heat dissipation capacity of the air-cooled cold plate.

[0016] 2. The solar panel supplies power to the thermoelectric cooling chip through the battery, forming a self-closed loop and improving the economy of the system.

[0017] 3. The use of a first-level thermoelectric cooling sheet realizes cooling at the chip cold plate, breaking through the temperature gradient limitation of conventional heat dissipation cold plates, raising the chip operating environment temperature to the ambient temperature + the temperature difference of the cooling sheet, and significantly improving the heat dissipation capacity of the air-cooled cold plate.

[0018] 4. The secondary cooling assembly can dissipate heat for the solar cell group through the fin end cover, which can ensure that the battery operates at a lower operating temperature, improve the working efficiency and reliability of the battery, and at the same time indirectly assist in dissipating heat for the air-cooled cold plate fins through the fin end cover, further improving the heat dissipation efficiency of the air-cooled cold plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention.

[0020] Figure 2 for Figure 1 Schematic diagram of the structural explosion.

[0021] Figure 3 It is a partial cross-sectional view.

[0022] Figure 4 Schematic diagram of the air-cooled skeleton fin structure.

[0023] Figure 5 It is a schematic diagram of the air-cooled skeleton substrate structure.

[0024] Figure 6 This is a schematic diagram of the front structure of the end cover.

[0025] Figure 7 This is a schematic diagram of the installation structure of the end cover plate and the secondary cooling assembly.

[0026] Figure 8 Schematic diagram of the secondary cooling assembly structure.

[0027] Among them, 1 is a skeleton cold plate, 2 is an end cover plate, 3 is a solar cell group, 4 is a thermally conductive pad, 5 is a primary thermoelectric cooling sheet, 6 is a chip mounting plate, 7 is a secondary cooling assembly, 8 is a battery, 11 is a fin threaded hole, 12 is a surrounding frame, 13 is a chip mounting plate fixing hole, 21 is a through hole on the end cover plate, 22 is a wiring groove on the end cover plate, 71 is a secondary cold plate, 72 is a secondary cooling sheet, 73 is a thermally conductive pad, and 74 is a screw hole. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] A high-efficiency air-cooled cold plate for solar-assisted thermoelectric refrigeration in this embodiment, such as Figure 1-Figure 6 As shown, it includes: an air-cooled skeleton 1 with a substrate and fins, a fin end cover plate 2 covered with a solar cell group 3, a secondary cooling assembly 7 mounted on the fin end cover plate 2 near the fin side, a primary thermoelectric cooling sheet 5 with a thermal conductive pad 4 crimped on the upper and lower surfaces, and a chip mounting plate 6. The ends of the fins of the air-cooled skeleton 1 are evenly distributed with threaded holes 11, and the fin end cover plate 2 is crimped and fixed to the ends of the fins by screws. A surrounding frame 12 and screw holes 13 are provided on the end surface of the substrate side of the air-cooled skeleton 1, and the surrounding frame is used to install the primary thermoelectric cooling sheet 5 and the thermal conductive pad 4. The side of the fin end cover plate 2 away from the fin is provided with a countersunk through hole 21 and a wiring groove 22, and the countersunk through hole 21 corresponds to the threaded hole 11 one by one. The solar cell group 3 is fixed between the wiring grooves 22, and is attached to the fin end cover plate 2 after the end cover plate 2 is fixed to the fin, and is composed of two or more battery cells. The cells are evenly arranged on the end cover plate 2 and connected in parallel with each other. They are connected to each other through wires arranged in the wiring groove 22. The wires are gathered and connected to the power input port of the battery 8. The solar cells store the converted electrical energy in the battery 8. The secondary cooling assembly 7 includes a secondary cold plate 71, a secondary cooling fin 72, a thermally conductive pad 73 attached to the upper and lower surfaces of the secondary cooling fin 72, and a screw mounting hole 74. The screw mounting hole 74 is designed as a countersunk through hole. The secondary cooling assembly 7 is fixed to the fin end cover plate 2 by screws, and the mounting position is at the fin spacing of the air-cooled skeleton 1. The cold end of the secondary thermoelectric cooling fin 72 faces the fin end cover plate 2, and indirectly assists in heat dissipation of the fins and solar cells of the air-cooled skeleton 1 by lowering the temperature of the end cover plate 2. The secondary cold plate 71 has heat dissipation fins, and shares the inter-fin cold air with the fins of the air-cooled skeleton 1 to achieve cooling of the secondary thermoelectric cooling fin 72. The hot end surface of the primary thermoelectric cooling sheet 5 contacts the air-cooled skeleton 1 through the thermal pad 4, and the cold end surface contacts the chip mounting board 6 through the thermal pad 4. The primary thermoelectric cooling sheets 5 are evenly distributed in the enclosure 12, and a gap is left between every two cooling sheets for wiring, and the gap between the cooling sheets is filled with thermal insulation cotton to ensure that the cold end of the primary cooling sheet 5 is completely exchanged with the mounting board 6, and the heat at the hot end is completely taken away by the fins of the air-cooled skeleton 1.

[0030] Its working principle is as follows: when the device is used for chip heat dissipation, the solar cell converts solar energy into electrical energy, and supplies power to the primary and secondary refrigeration sheets through the battery; the primary refrigeration sheet starts to work after being powered on, and performs cooling at the chip mounting plate, providing a constant low-temperature environment for the heat-generating chip to ensure normal operation during the period; the heat generated by the hot end of the primary refrigeration sheet is transferred to the fins at the bottom of the frame through the air-cooled cold plate, and the heat is eventually taken away by the cold air between the wings. When the secondary refrigeration sheet is working, it performs cooling at the end cover plate, which, on the one hand, provides a low-temperature installation and working environment for the solar cell, and on the other hand, the low-temperature end cover plate provides auxiliary heat dissipation for the high-temperature cold plate fins, improving the heat dissipation efficiency, and the hot end temperature of the secondary refrigeration sheet is taken away by the cold air between the wings.

[0031] The present invention is not limited to the above specific implementations, and the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made to the above implementations based on the technical essence of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-efficiency air-cooled cold plate for solar-assisted thermoelectric refrigeration, characterized in that: It includes an air-cooled frame with fins, a fin end cover plate covered with a solar cell group, a secondary cooling assembly mounted on the fin end cover plate close to the fin side, a primary thermoelectric cooling sheet with a thermal conductive pad pressed on the upper and lower surfaces, and a chip mounting plate 6; The ends of the air-cooled skeleton fins are evenly provided with threaded holes, which are used to crimp and fix the fin end cover plates to the fin ends by screws, and a secondary cooling component is installed on the fin end cover plates close to the fin side, and a solar cell group is fixed on the side away from the fin; a frame is provided on the end face of the air-cooled skeleton substrate side, and a primary thermoelectric cooling sheet and a thermal conductive pad are installed in the frame, and the chip mounting plate is fixed to the air-cooled skeleton by screws.

2. A high-efficiency air-cooled cold plate for solar-assisted thermoelectric refrigeration according to claim 1, characterized in that: The fin end cover plate is provided with countersunk through holes and wiring grooves on the side away from the air-cooled skeleton fins. The countersunk through holes 21 correspond one-to-one to the threaded holes on the fins and are used to fix the end cover plate on the fins; the wiring grooves are used for wiring inside the solar cell group. At the same time, the end cover plate is provided with threaded holes on the side close to the air-cooled skeleton fins for fixing the secondary cooling assembly.

3. A high-efficiency air-cooled cold plate for solar-assisted thermoelectric refrigeration according to claim 2, characterized in that: The solar cell group is composed of two or more battery cells, which are installed in parallel between the wiring troughs; the solar cell group absorbs solar energy and converts it into electrical energy, and stores the electrical energy in the battery through the wires.

4. A high-efficiency air-cooled cold plate for solar-assisted thermoelectric refrigeration according to claim 3, characterized in that: The secondary cooling assembly consists of a secondary cold plate, a secondary thermoelectric cooling sheet, a thermally conductive pad attached to the upper and lower surfaces of the secondary cooling sheet, and a screw mounting hole; the screw mounting hole is a countersunk hole, and the secondary cooling sheet is tightly pressed onto the end cover plate by a countersunk screw.

5. A high-efficiency air-cooled cold plate for solar-assisted thermoelectric refrigeration according to claim 4, characterized in that: The size and performance of the secondary cold plate and the secondary thermoelectric refrigeration sheet are weaker than those of the air-cooled frame and the primary thermoelectric refrigeration sheet; the cold end of the secondary refrigeration sheet is close to the end cover plate, and the hot end is close to the secondary cold plate. When working, the end cover plate is cooled, and the heat generated is carried away by the cold air between the wings of the air-cooled frame through the secondary cold plate.

6. A high-efficiency air-cooled cold plate for solar-assisted thermoelectric refrigeration according to claim 1, characterized in that: The first-level thermoelectric cooling sheets are evenly distributed over the frame, and a gap is left between every two thermoelectric cooling sheets for wiring, and the gap between the thermoelectric cooling sheets is filled with thermal insulation cotton to ensure that the cold end of the first-level cooling sheet is completely heat-exchanged with the chip through the chip mounting plate, and the heat is completely taken away by the fins of the air-cooled skeleton 1.

7. The high-efficiency air-cooled cold plate for solar-assisted thermoelectric refrigeration according to claim 1, characterized in that: The height of the enclosure is determined by the primary thermoelectric cooling sheet and the thermal pad, that is, after the primary thermoelectric cooling sheet and the thermal pad are pressed by the chip mounting plate, the compression amount of the thermal pad is guaranteed to be 20%-30%, and the height of the enclosure is ensured to be in contact with the chip mounting plate 6.

8. The high-efficiency air-cooled cold plate for solar-assisted thermoelectric refrigeration according to claim 1, characterized in that: The air-cooled skeleton, end cover, solar cell group, thermoelectric cooling sheet, chip mounting plate, and secondary cooling assembly are all independent, and the modules are connected by screws; the primary thermoelectric cooling sheet and the secondary cooling sheet are connected to the battery power supply port through wires, and the battery provides the required electricity for work.

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