A heat pipe radiator comprising a heat collecting element

Abstract

This invention discloses a heat pipe radiator containing heat collection elements. It consists of at least one microchannel parallel tube, fins, at least two heat collection elements, an air duct, and a fan. The microchannel parallel tube is filled with a working medium to form a heat pipe, which is divided into an evaporation section and a condensation section according to the different heat absorption and release functional zones. The fins are arranged in the condensation section of the heat pipe, and the heat collection elements are arranged in the evaporation section. The heat collection elements adopt an assembled structure. The heat collection elements carry the heat from the heat source to the fins in the condensation section through the heat pipe. The fan provides power to diffuse the heat into the environment through the flowing air in the air duct. The air duct wall provides a fixed position for the fan. The heat collection elements are combined with the microchannel parallel tube by extrusion, which reduces the gap between the heat collection elements and the microchannel parallel tube, and also reduces the use of thermally conductive interface materials. This greatly increases the contact area between the microchannel parallel tube and the heat collection elements, resulting in a simple process and high reliability.

Description

Technical Field

[0001] This invention relates to the field of radiators, and in particular to a heat pipe radiator containing a heat collection element. Background Technology

[0002] In fields such as electric vehicles, industrial electronics, consumer electronics, computer rooms, and data servers, equipment or devices generate a lot of heat when they are working. If this heat cannot be dissipated in time, the temperature of the equipment or the ambient temperature will continue to rise. High temperatures will seriously affect the operational stability and lifespan of the equipment. Therefore, various thermal management measures are required to ensure that the equipment operates within a suitable temperature range.

[0003] Thermal management includes heat transfer and heat dissipation. Currently, the combination of microchannel heat pipes and heat collection units often involves milling grooves in the heat collection unit, applying thermal grease to the microchannel heat pipes, and then inserting them into the grooves. However, microchannel heat pipes are prone to twisting and deformation during processing, making the process cumbersome and the thermal grease difficult to apply evenly. This results in a large amount of air trapped at the contact points between the heat pipes and the heat transfer unit, leading to low heat transfer efficiency.

[0004] Another method is to widen the milling groove and embed the microchannel heat pipe into the milling groove of the heat collection element, and then weld them together. However, the walls of the microchannel heat pipe are thin, and the heat collection unit needs thicker material to conduct the heat from the bottom to the microchannel heat pipe. This difference in heat capacity greatly increases the welding time and reduces efficiency, which limits the development of the heat pipe heat dissipation industry. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a heat pipe radiator containing heat collection elements, comprising at least one microchannel parallel tube, fins, at least two heat collection elements, an air duct, and a fan. The microchannel parallel tube is filled with a working medium to form a heat pipe, which is divided into an evaporation section and a condensation section according to the different heat absorption and heat release functional areas. The fins are arranged in the condensation section of the heat pipe, and the heat collection elements are arranged in the evaporation section of the heat pipe. The heat collection elements adopt an assembled structure. The heat collection elements carry the heat from the heat source to the fins in the condensation section through the heat pipe. Powered by the fan, the heat is diffused into the environment through the flowing air in the air duct. The air duct wall provides a fixed position for the fan.

[0006] Preferably, the heat collection element adopts a spliced ​​structure, and can be one or more combinations of shapes such as ⊥, L, and |. According to experimental studies, it is easier to apply thermal grease to heat collection elements that are L-shaped or T-shaped.

[0007] Furthermore, the structural thickness between the inserted microchannel parallel tubes should be less than the spacing between the parallel tubes, with the difference being between 0 mm and 0.5 mm.

[0008] Furthermore, the distance between the extruded front end face of the heat collection element root should be between 0 mm and 0.5 mm. Through lateral extrusion, the microchannel parallel tube undergoes slight deformation and fits tightly with the heat collection element. Applying pressure to the outer end of the heat collection element allows for an even tighter fit between the heat pipe and the heat collection element.

[0009] Furthermore, multiple heat collection units are secured by adding screws.

[0010] Furthermore, the fan is located on one side of the fins, the fan direction is parallel to the airflow direction in the duct, and the fan is fixed to the duct wall.

[0011] Furthermore, at least one side of the heat collection element is in contact with the heat source. The heat from the heat collection element is transferred to the microchannel parallel tube, and then transferred to the fins by the working medium in the microchannel parallel tube. Power is provided by the fan, and the heat is carried away by the air in the air duct.

[0012] This invention employs a heat collection element combined with a microchannel parallel tube via extrusion. This combination method reduces the gap between the heat collection element and the microchannel parallel tube, while also reducing the use of thermal interface materials. For applications with low heat flux density, thermal interface materials may not even be required; the heat collection element surface and the microchannel parallel tube surface can be directly bonded by pressure deformation. This design significantly increases the contact area between the microchannel parallel tube and the heat collection element, simplifying the process and ensuring high reliability. Attached Figure Description

[0013] Figure 1 This shows a front view of a heat pipe radiator containing heat collection elements;

[0014] Figure 2 Showing Figure 1 A side view of a heat pipe radiator containing heat collection elements;

[0015] Figure 3 Showing Figure 1 Left view of a heat pipe radiator containing heat collection elements;

[0016] Figure 4 Showing Figure 1 A diagram showing the state of the heat collection element before it is placed into the microchannel parallel tube and compressed.

[0017] Figure 5 Showing Figure 1 The state of the heat collection element after it has been placed into a microchannel parallel tube and compressed.

[0018] In the diagram: 1. Microchannel parallel tube; 2. Fin; 3. Heat collection element; 4. Air duct; 5. Fan; 6. Screw. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] Figure 1-3 The diagram schematically illustrates the structure of a heat pipe radiator containing heat collection elements. The heat pipe radiator consists of at least one microchannel parallel tube 1, fins 2, at least two heat collection elements 3, an air duct 4, and a fan 5. The microchannel parallel tube 1 is filled with a working medium to form a heat pipe, which is divided into an evaporation section and a condensation section. The fins 2 are installed in the condensation section of the heat pipe, and the heat collection elements 3 are installed in the evaporation section. The heat collection elements 3 transfer heat from the heat source to the fins 2 in the condensation section through the heat pipe. Powered by the fan 5, the heat is diffused into the environment through the flowing air in the air duct 4, which provides a fixed position for the fan 5.

[0021] The fan 5 is located on one side of the fin 2. The airflow direction of the fan 5 is parallel to the airflow direction in the air duct 4. The fan 5 is fixed on the side wall of the air duct 4.

[0022] The heat collection element 3 adopts a spliced ​​structure, and at least one side of it is in contact with the heat source. The heat collection element 3 can be selected from one or more combinations of shapes such as ⊥, L, and |. The structural thickness of the element 3 inserted between the microchannel parallel tubes 1 is less than the spacing between the parallel tubes, with a difference of 0 mm to 0.5 mm. The distance between the front end face of the root of the heat collection element 3 is 0 mm to 0.5 mm. After the microchannel parallel tube 1 is slightly deformed under pressure, it fits tightly with the heat collection element 3.

[0023] In addition, screws 6 are used to fix each heat collection element 3.

[0024] exist Figure 4 In the process, the heat collection element 3 is L-shaped and made of aluminum alloy. Silicon grease is applied to the heat conduction element and the heat pipe. The thickness of the aluminum material in which the heat collection element 3 is inserted into the middle of the microchannel heat pipe is 7.9mm. The spacing between the parallel tubes of the microchannel is 8mm. The gap between the end faces of the bottom plate of the heat collection element 3 is 0.1mm.

[0025] And in Figure 5 In the process, the microchannel parallel tube is tightly fitted to the wall of the heat collection element 3 through interference compression, and then the bottom end is connected with screws 6. In some applications, effective fixing can also be achieved by gluing or welding.

[0026] The heat pipe that is in contact with the heat collection element 3 can be vacuumed and filled with working medium using existing scientific and technological methods. Then the heat pipe is sealed, and the working medium flows in the microchannel parallel tube to form a heat pipe.

[0027] The inner cross-section hole of the microchannel parallel tube 1 can be rectangular, square, circular, triangular, trapezoidal and other polygonal shapes, with a diameter generally between 0.3 and 3 mm. Preferably, in this example, the inner cross-section hole is a square with a side length of 1.2 mm.

[0028] The working medium of a heat pipe is generally selected from water, ethanol, acetone, ammonia, and Freon, depending on the situation. The liquid filling volume is generally 30% to 80% of the internal volume. Based on compatibility, the heat pipe wall is made of aluminum alloy, and the internal working medium is R134a.

[0029] In this heat sink, the microchannel parallel tube 1 can be set into a serpentine shape with multiple bends, or it can be set into multiple straight tubes according to the actual situation. The tubes are evacuated and filled with working medium to form heat pipes, and multiple fins 2 are installed in the condensation section between each bend to improve its heat dissipation capacity.

[0030] At least one side of the heat collection element 3 is in contact with the heat source. The heat generated by the electronic device can be transferred from the heat collection element 3 to the heat pipe formed by the microchannel parallel tube 1, and then transferred to the fins 2 by the heat pipe. The fan 5 provides power, and the air absorbs heat through the fins 2 and then diffuses the heat into the air through the air duct 4.

[0031] The heat pipe radiator containing heat collection elements described above is an embodiment provided to facilitate understanding by those skilled in the art. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept, and these all fall within the protection scope of this heat pipe heat-conducting element.

Claims

1. A heat pipe radiator containing a heat collection element, characterized in that: It consists of at least one microchannel parallel tube (1), fins (2), at least two heat collection elements (3), air duct (4) and fan (5). The microchannel parallel tube (1) is filled with working medium to form a heat pipe. The heat pipe is divided into an evaporation section and a condensation section. The fins (2) are installed in the condensation section of the heat pipe. The heat collection elements (3) are installed in the evaporation section of the heat pipe. The heat collection elements (3) carry the heat from the heat source to the fins (2) in the condensation section through the heat pipe. The fan (5) provides power to diffuse the heat into the environment through the flowing air in the air duct. The air duct (4) provides a fixed position for the fan (5). The structural thickness between the heat collection element (3) inserted into the microchannel parallel tube (1) is less than the spacing between the parallel tubes, with a difference of 0mm~0.5mm. The distance between the extruded front end face of the heat collection element (3) is 0 mm to 0.5 mm, and the microchannel parallel tube (1) is closely fitted with the heat collection element (3).

2. A heat pipe radiator containing a heat collection element according to claim 1, characterized in that: The shape of the splicing structure adopted by the heat collection element (3) is selected from one or more combinations of ⊥ type, L type, and | type.

3. A heat pipe radiator containing a heat collection element according to claim 2, characterized in that: Use screws (6) to fix each heat collection element (3).

4. A heat pipe radiator containing a heat collection element according to claim 2, characterized in that: Thermally conductive colloid is applied between the contact surfaces of the heat collection element (3) and the microchannel parallel tube (1) and they are pressed together.

5. A heat pipe radiator containing a heat collection element according to claim 1, characterized in that: The fan (5) is located on one side of the fin (2), and the airflow direction of the fan (5) is parallel to the airflow direction in the air duct (4). The fan (5) is fixed on the side wall of the air duct (4).

6. A heat pipe radiator containing a heat collection element according to any one of claims 1-5, characterized in that: At least one side of the heat collection element (3) is in contact with the heat source.

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