Single-phase jet type liquid cooling plate

Abstract

The utility model discloses a single-phase jet type liquid cooling plate, which comprises a runner plate, a liquid receiving groove, a backflow groove and two communicating grooves are formed on the front surface of the runner plate, and the communicating grooves are connected between the end part of the liquid receiving groove and the end part of the backflow groove; the plurality of heat dissipation needles are vertically arranged in the liquid receiving tank; a plurality of first heat dissipation fins, wherein the plurality of first heat dissipation fins are vertically arranged in the two opposite ends of the liquid receiving groove respectively; the plurality of second heat dissipation fins are vertically arranged in the backflow groove; the sealing cover plate is installed on the front face, the sealing cover plate seals the liquid receiving groove, the backflow groove and the communication groove, a liquid inlet and a liquid outlet are formed in the sealing cover plate, the position of the liquid inlet corresponds to the multiple heat dissipation needles, and the position of the liquid outlet corresponds to the multiple second heat dissipation fins. The liquid cooling plate solves the problems that the thickness of a boundary layer in the area is large and the heat resistance of flow heat exchange is high due to the fact that the length direction of a cooling fin or a flow channel at a heat source position of a traditional liquid cooling plate is consistent with the flowing direction of a refrigerant.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid cooling plates, and particularly relates to a single-phase jet type liquid cooling plate. Background Art

[0002] One of the key components of the liquid cooling and heat dissipation technology is the liquid cooling plate. The liquid cooling plate is an intermediate place for heat exchange. The heat generated by the chip is conducted to the liquid cooling plate in a heat conduction manner. During the flow of the refrigerant in the internal flow channels of the liquid cooling plate, convective heat transfer occurs with the side walls of the flow channels, and the heat is transferred from the side walls of the flow channels of the liquid cooling plate to the refrigerant, and the temperature of the refrigerant rises, thereby taking away the heat.

[0003] Currently, the internal flow channels of the liquid cooling plates commonly used in the server and communication fields are shovel tooth flow channels.

[0004] The heat source position is located in the central area of the liquid cooling plate, and the direction of the refrigerant flowing through the heat source position is the same as the length direction of the shovel tooth fins. Since fluids all have viscosity, a flow boundary layer is formed on the surface of the shovel teeth. The thickness of the boundary layer gradually increases with the flow direction, and the heat transfer performance gradually weakens.

[0005] The information disclosed in this background art section is only intended to enhance the overall understanding of the present utility model and should not be regarded as an admission or any form of suggestion that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0006] To overcome the defects existing in the prior art, the present utility model provides a single-phase jet type liquid cooling plate to solve the problem that the length direction of the heat sink or the flow channel at the heat source position of the traditional liquid cooling plate is the same as the flow direction of the refrigerant, resulting in a relatively large boundary layer thickness and a relatively high flow heat transfer resistance in this area.

[0007] To achieve the above object, the present utility model provides a single-phase jet type liquid cooling plate, comprising:

[0008] A flow channel plate having a front surface and a back surface, wherein a liquid receiving groove, a reflux groove and two communication grooves are formed on the front surface, and the communication grooves are connected between the end of the liquid receiving groove and the end of the reflux groove;

[0009] Multiple heat dissipation pins vertically arranged in the liquid receiving groove;

[0010] Multiple first heat dissipation fins, with the multiple first heat dissipation fins vertically arranged respectively at opposite ends inside the liquid receiving groove, and the first heat dissipation fins are arranged along the length direction of the liquid receiving groove;

[0011] Multiple second heat dissipation fins vertically arranged in the reflux groove, and the second heat dissipation fins are arranged along the length direction of the reflux groove;

[0012] The cover plate is installed on the front surface. The cover plate closes the liquid receiving groove, the reflux groove and the communication groove. The cover plate is provided with a liquid inlet and a liquid outlet. The position of the liquid inlet corresponds to the multiple heat dissipation pins, and the position of the liquid outlet corresponds to the multiple second heat dissipation fins.

[0013] Furthermore, the multiple heat dissipation pins are arranged in a matrix.

[0014] Furthermore, the multiple heat dissipation pins are arranged in the middle of the liquid receiving groove.

[0015] Furthermore, the first heat dissipation fins and the second heat dissipation fins are shovel-shaped fins.

[0016] The beneficial effect of the present utility model is that the position of the liquid receiving groove of the flow channel plate of the single-phase jet liquid cooling plate of the present utility model facing the heat source is designed as multiple heat dissipation pins (i.e., needle-shaped heat dissipation fins). The first heat dissipation fins are arranged on the relative two sides of the multiple heat dissipation pins. The second heat dissipation fins are arranged in the reflux groove. The refrigerant enters the flow channel plate from the positive top end of the heat dissipation pins (i.e., needle-shaped heat dissipation fins), and realizes jet impingement cooling on the heat dissipation pins and the bottom of the liquid receiving groove. Subsequently, the refrigerant flows directionally along the first heat dissipation fins and then flows into the second heat dissipation fins. The heat exchange in the whole process includes two parts, namely, jet impingement heat transfer in the heat dissipation pin area and convective heat transfer in the heat dissipation fin area.

[0017] The single-phase jet liquid cooling plate of the present utility model can effectively increase the heat transfer intensity in the heat source area and reduce the heat transfer thermal resistance in the heat source area. Especially for heat sources with small size and high heat flux density, its effect will be more advantageous compared with traditional liquid cooling plates. Description of the Drawings

[0018] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes and advantages of the present application will become more obvious:

[0019] Figure 1 It is a schematic structural diagram of the single-phase jet liquid cooling plate of the embodiment of the present utility model.

[0020] Figure 2 It is Figure 1 The cross-sectional view at A-A in

[0021] Figure 3 It is a schematic plan view of the heat dissipation pins of the embodiment of the present utility model.

[0022] Figure 4 It is a side view of the heat dissipation pins of the embodiment of the present utility model. Detailed Embodiments

[0023] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model and not to limit the utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the utility model are shown in the drawings.

[0024] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0025] Referring to Figures 1 to 4 As shown, the present utility model provides a single-phase jet liquid cooling plate, including: a flow channel plate 1, heat dissipation pins 2, a first heat dissipation fin 3, a second heat dissipation fin 4, and a cover plate 5.

[0026] Among them, the flow channel plate 1 is rectangular. The flow channel plate 1 has a front surface and a back surface. A liquid receiving groove, a return groove, and two connecting grooves a are formed on the front surface of the flow channel plate 1. The connecting groove a is connected between the end of the liquid receiving groove and the end of the return groove.

[0027] The number of the heat dissipation pins 2 is multiple. Multiple heat dissipation pins 2 are vertically arranged in the liquid receiving groove.

[0028] As a preferred embodiment, multiple heat dissipation pins 2 are arranged in a matrix.

[0029] In this embodiment, multiple heat dissipation pins 2 are arranged in the middle of the liquid receiving groove.

[0030] The number of the first heat dissipation fins 3 is multiple. Multiple first heat dissipation fins 3 are vertically arranged in the relative two ends of the liquid receiving groove respectively. The first heat dissipation fins 3 are arranged along the length direction of the liquid receiving groove. The two first heat dissipation fins in the liquid receiving groove are respectively arranged on the relative two sides of multiple heat dissipation pins.

[0031] Multiple first heat dissipation fins 3 are arranged at equal intervals. A first flow channel is formed between two adjacent first heat dissipation fins and between the first heat dissipation fin and the groove wall of the liquid receiving groove.

[0032] The number of the second heat dissipation fins 4 is multiple. Multiple second heat dissipation fins 4 are vertically arranged in the return groove at equal intervals. The second heat dissipation fins 4 are arranged along the length direction of the return groove.

[0033] A second flow channel is formed between two adjacent second heat dissipation fins and between the second heat dissipation fin 4 and the groove wall of the return groove.

[0034] As a preferred embodiment, the first heat dissipation fins 3 and the second heat dissipation fins 4 are shovel-tooth fins.

[0035] The cover plate 5 is installed on the front surface of the flow channel plate 1. Specifically, the flow channel plate and the cover plate are hermetically welded by vacuum brazing, diffusion welding, or electron beam welding.

[0036] The cover plate 5 closes the liquid receiving groove, the reflux groove and the communication groove a. The cover plate 5 is provided with a liquid inlet and a liquid outlet. The position of the liquid inlet corresponds to multiple heat dissipation pins 2. The position of the liquid outlet corresponds to multiple second heat dissipation fins 4.

[0037] In the single-phase jet type liquid cooling plate of the present utility model, the position of the liquid receiving groove of the flow channel plate facing the heat source is designed as multiple heat dissipation pins (i.e., needle-shaped heat dissipation fins), and the first heat dissipation fins are arranged on the relative two sides of the multiple heat dissipation pins. The second heat dissipation fins are arranged in the reflux groove. Referring to Figure 2 the arrows shown in [reference], the refrigerant enters the flow channel plate from the liquid inlet at the positive top end of the heat dissipation pins (i.e., needle-shaped heat dissipation fins), realizes jet impingement cooling on the heat dissipation pins and the bottom of the liquid receiving groove, then the refrigerant flows directionally along the first heat dissipation fins, and then flows into the second heat dissipation fins and flows out through the liquid outlet. The heat exchange in the whole process includes two parts, namely, jet impingement heat transfer in the heat dissipation pin area and convective heat transfer in the heat dissipation fin area.

[0038] The single-phase jet type liquid cooling plate of the present utility model can effectively increase the heat transfer intensity of the heat source area and reduce the heat transfer thermal resistance of the heat source area. Especially for heat sources with small size and high heat flux density, its effect will be more advantageous compared with traditional liquid cooling plates.

[0039] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principle. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solution formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. A single-phase jet liquid cooling plate, characterized in that: include: A flow channel plate, the flow channel plate having a front side and a back side, the front side being formed with a liquid receiving groove, a reflux groove and two connecting grooves, the connecting groove being connected between an end of the liquid receiving groove and an end of the reflux groove; A plurality of heat dissipation pins are vertically arranged in the liquid receiving tank; A plurality of first heat dissipation fins, wherein the plurality of first heat dissipation fins are vertically arranged in opposite ends of the liquid receiving tank, respectively, and the first heat dissipation fins are arranged along the length direction of the liquid receiving tank; A plurality of second heat dissipation fins are vertically arranged in the reflow groove, and the second heat dissipation fins are arranged along the length direction of the reflow groove; A cover plate is installed on the front side, the cover plate closes the liquid receiving groove, the reflux groove and the connecting groove, the cover plate is provided with a liquid inlet and a liquid outlet, the position of the liquid inlet corresponds to the multiple heat dissipation needles, and the position of the liquid outlet corresponds to the multiple second heat dissipation fins.

2. The single-phase jet liquid cooling plate according to claim 1, characterized in that: The plurality of heat dissipation pins are arranged in a matrix.

3. The single-phase jet liquid cooling plate according to claim 2, characterized in that: The plurality of heat dissipation pins are arranged in the middle of the liquid receiving tank.

4. The single-phase jet liquid cooling plate according to claim 1, characterized in that: The first heat dissipation fins and the second heat dissipation fins are shovel-tooth fins.

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