CN209527039U - It is a kind of using air-cooled heat pipe cold plate - Google Patents

Abstract

The utility model discloses an air-cooled heat pipe cold plate, wherein a heat pipe unit is embedded in the air-cooled cold plate, thereby obtaining a cold plate structure with built-in heat pipes, and fins are arranged at both ends of the two large surfaces of the cold plate to increase the The heat exchange area finally transfers the heat generated by the electronic appliances through the fins. Compared with ordinary cold plates, the air-cooled cold plate has greatly improved heat exchange capacity and uniform temperature.

Description

An air-cooled heat pipe cold plate

technical field

The utility model belongs to the field of electronic appliance radiators, in particular to a cold plate with built-in heat pipes.

Background technique

The air-cooled cold plate is a kind of common device in the heat dissipation device of electronic and electrical equipment. It is generally made of metal materials with high thermal conductivity such as aluminum alloy or copper alloy. In order to enhance the heat dissipation effect, a groove is usually machined on the shape of the cold plate. Or add fins to increase the heat dissipation area. At present, with the rapid development of high-tech, the heating power density of electronic components is increasing, while the size is getting smaller and smaller, which makes it more and more difficult to achieve their cooling requirements.

For the traditional air-cooled cold plate in the small size design requirements, the heat exchange efficiency can only be enhanced by reducing the thickness of the fins, increasing the number of fins, and increasing the heat dissipation area. There are usually two ways to achieve this. The first method is to integrally process the cold plate body and the fins on a single piece of material. The second method is to process the cold plate body first, and then weld the fins. For the cold plate with integrally processed fins, the heat transfer performance is good, but the working time is long, the precision requirements are high, and the processing is difficult; for the cold plate with welded fins, the processing is convenient, but the contact between the main body of the cold plate and the fin is relatively high. Poor, low thermal conductivity.

SUMMARY OF THE INVENTION

Purpose of the invention: The utility model discloses an air-cooled heat pipe cold plate, which can effectively enhance the thermal conductivity and provide high-power uniform temperature heat dissipation.

Technical scheme: in order to achieve the above-mentioned purpose, the utility model can adopt the following technical scheme:

An air-cooled heat pipe cold plate is characterized in that it includes a base plate, a cover plate, a heat pipe element and fins, wherein the base plate includes an upper surface, a lower surface opposite to the upper surface, two end faces and two side surfaces, The upper surface is recessed with a cover plate groove, and the bottom of the cover plate groove is further recessed with a heat pipe groove, the length of the heat pipe groove is smaller than the length of the cover plate groove, and the width of the heat pipe groove is smaller than the width of the cover plate groove; The heat pipe element is installed in the heat pipe groove, the cover plate is installed in the cover plate groove and covers the heat pipe element; the fins are respectively arranged on both sides of the heat pipe element in the extending direction and connected to the side or end surface of the base plate.

Further, when the extending direction of the heat pipe element is extending toward both sides of the substrate, the fins are arranged on both sides of the substrate; when the extending direction of the heat pipe element is extending toward both ends of the substrate, the fins are installed on both ends of the substrate.

Further, the upper surface or the lower surface of the substrate is the mounting surface of the heat sink.

Further, the fins are assembled on the side surface or the end surface of the base plate; the fins are integrally processed with the base plate.

In general, compared with the existing aluminum alloy air-cooled cold plate technology, the above technical solution conceived by the present invention has the following significant beneficial effects. The heat generated by the heat source with high heat flux density is quickly and evenly conducted to the fins at both ends, which improves the heat transfer performance of the cold plate.

Description of drawings

Figure 1 is a schematic structural diagram of a heat pipe cold plate using air cooling.

FIG. 2 is a schematic diagram of the processing of an air-cooled heat pipe cold plate.

Among them, 100. Air-cooled fins of the cold plate, 200. Mounting screw holes of the cold plate, 300. The large mounting surface provided by the cold plate for electronic appliances that need heat dissipation and cooling, 1. Substrate blank, 2. Heat pipe elements, 3. Cover blank, 12. Cover slot, 13. Heat pipe slot.

Detailed ways

Please refer to FIG. 1 and FIG. 2 , the present invention discloses an air-cooled heat pipe cold plate, including a base plate 1, a cover plate 3, a heat pipe element 2 and fins 100, wherein the base plate includes an upper surface, an upper surface On the opposite lower surface, two end surfaces and two side surfaces, a cover plate groove 12 is recessed inward on the upper surface, and a heat pipe groove 13 is further recessed inward at the bottom of the cover plate groove 12. The length of the heat pipe groove 13 is smaller than the length of the cover plate slot 12, and the width of the heat pipe slot 13 is smaller than the width of the cover plate slot 12; the heat pipe element is installed in the heat pipe slot 13, and the cover plate 3 is installed in the cover plate slot 12 and covers the heat pipe element; the The fins 100 are respectively disposed on both sides of the extending direction of the heat pipe element and connected to the side or end surface of the base plate. The heat pipe 2 can rapidly and uniformly conduct the heat generated by the local high heat flux density heat source to the fins 100 at both ends, thereby improving the heat transfer performance of the cold plate. When the extension direction of the heat pipe element is to extend to both sides of the substrate, the fins 100 are arranged on both sides of the substrate; when the extension direction of the heat pipe element is to extend to both ends of the substrate, the fins 100 are arranged At both ends of the substrate, the two ends of the heat pipe element 2 should be close to the fins 100 so that the heat pipe element 2 can effectively conduct heat to the fins 100 for heat dissipation. The upper surface or the lower surface of the base plate is the mounting surface of the heat sink. The fins are assembled on the side or end face of the base plate; the fins are integrally processed with the base plate.

Please refer to FIG. 2 for an embodiment of processing the heat pipe cold plate.

Include the following steps.

Step 1: Prepare a base plate blank and a cover plate blank according to the shape of the cold plate.

Preparation of aluminum alloy substrate (1) blank: 240mm×100mm×26mm,

Machining cover slot(12) The four corners are rounded R4;

Machining Heat Pipe Slots(13) Round corners R2.

The cover blank size is Round corners R4.

In step 2, the cover plate groove (12) and the heat pipe groove (13) are processed on the substrate blank; the length and width of the cover plate groove (12) are at least 5 mm larger than the length and width of the heat pipe groove; and the cover plate groove ( 12) The clearance fit with the cover plate blank (3) is a transition fit, and the thickness of the cover plate blank (3) is equal to the depth of the cover plate groove (12).

Step 3, fixing the heat pipe (2) in the heat pipe groove (13) with thermally conductive adhesive; the length, width and depth of the heat pipe groove (13) are respectively 0.1mm larger than the length, width and height of the heat pipe;

Step 4, use a rubber hammer to drive the cover plate blank into the cover plate groove (12);

Step 5, use the method of friction stir welding to weld the cover plate blank and the gap of the cover plate groove (12) into a whole; Stirring head, the welding speed is 1200RPM, the welding speed is 100mm/min, the positive pressure is 15-25kN, and the welding nugget temperature is maintained between 75% and 85% of the melting point temperature of the aluminum alloy material used during the welding process.

Step 6, remove excess material and process the shape of the cold plate. The fins connected to the cold plate can be directly machined integrally with the cold plate or assembled with the external cooling fins and the cold plate.

There are many methods and approaches for implementing the technical solution in the present invention, and the above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, some improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims (5)

1. An air-cooled heat pipe cold plate, characterized in that it comprises a base plate (1), a cover plate (3), a heat pipe element (2) and a fin (100), wherein the base plate comprises an upper surface, a The opposite lower surface, two end surfaces and two side surfaces are provided with a cover plate groove (12) concave inward on the upper surface, and a heat pipe groove (13) is further concave inward at the bottom of the cover plate groove (12), so The length of the heat pipe groove (13) is smaller than the length of the cover plate groove (12), and the width of the heat pipe groove (13) is smaller than the width of the cover plate groove (12); the heat pipe element is installed in the heat pipe groove (13), and the cover The plate (3) is installed in the cover plate slot (12) and covers the heat pipe element; the fins (100) are respectively arranged on both sides of the extension direction of the heat pipe element and connected to the side or end surface of the base plate. 2. The heat pipe cold plate according to claim 1, characterized in that: when the extension direction of the heat pipe element is to extend to both sides of the base plate, the fins (100) are arranged on both sides of the base plate; When the extension direction of the heat pipe element is to extend toward both ends of the base plate, the fins (100) are arranged at both ends of the base plate. 3 . The heat pipe cold plate according to claim 2 , wherein the upper surface or the lower surface of the base plate is the mounting surface of the heat sink. 4 . 4. The heat pipe cold plate according to claim 1 or 2, wherein the fins are assembled on the side surface or the end surface of the base plate. 5. The heat pipe cold plate according to claim 1 or 2, wherein the fins are integrally processed with the base plate.