Heat dissipation system

Abstract

The utility model relates to the field of heat dissipation, in particular to a heat dissipation system which comprises a heat source and a cold plate attached to the heat source, an S-shaped cooling flow channel is formed in the cold plate, a mounting hole communicated with the cooling flow channel is formed in the plate face of the cold plate, a micropump is arranged in the mounting hole, and the fluid end of the micropump extends into the cooling flow channel from the mounting hole. The refrigerant is used for conveying the refrigerant of the cooling flow channel; and the cold plate inlet, the cooling flow channel, the cold plate outlet and the liquid storage tank are sequentially communicated to form a circulating channel of a refrigerant. According to the utility model, the cold plate and the power source for conveying the refrigerant are integrally arranged, so that the number of pipelines in the system is reduced, and the size of the system is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of heat dissipation, and specifically relates to a heat dissipation system. BACKGROUND

[0002] The T / R components in the radar system are one of the core components of the radar system, which are responsible for transmitting radio waves and receiving returned signals. Since these components generate a large amount of heat when working, an effective heat dissipation system is needed to ensure the stable operation of the components and prolong the service life. To achieve cooling of the T / R components, the traditional heat dissipation structure as described in the announcement number "CN219108092U" contacts the cold plate with the heat source to exchange heat, thereby achieving cooling of the heat source. Parallel flow channels, series flow channels and complex three-dimensional flow channels are usually arranged in the cold plate, which relies on the flow of refrigerant in the internal flow channels of the cold plate to remove the heat generated by the TR components through heat conduction and convection.

[0003] To drive the flow of refrigerant in the cold plate, a water pump is usually externally connected to the inlet or outlet of the cold plate through a pipeline, thereby continuously conveying the refrigerant. The external design of the water pump increases the number of pipelines, and the increase in the number of pipelines increases the risk of leakage at the interface. In addition, the independent external water pump also needs to be supported separately, further increasing the volume of the system. Therefore, it is urgent to solve this problem. SUMMARY

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a heat dissipation system. The utility model integrates the cold plate and the power source for conveying refrigerant, reduces the number of pipelines in the system, and reduces the volume of the system.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A heat dissipation system comprises a heat source and a cold plate arranged in contact with the heat source. The cold plate is provided with a cooling flow channel in the form of an S shape. The surface of the cold plate is provided with a mounting hole in communication with the cooling flow channel. A micro pump is arranged in the mounting hole, and the liquid end of the micro pump extends from the mounting hole into the cooling flow channel to convey the refrigerant in the cooling flow channel. The cold plate inlet, the cooling flow channel, the cold plate outlet and the liquid storage tank are sequentially communicated to form a circulating channel for the refrigerant.

[0007] As a further scheme of the utility model, the heat source, the cold plate and the heat exchanger are sequentially stacked from bottom to top in the shell. There is a space between the cold plate and the heat exchanger for fixing the micro pump. The liquid storage tank is arranged on the side surface of the cold plate. The cold plate outlet is in communication with the inlet of the liquid storage tank through the inlet pipeline of the liquid storage tank. The outlet of the liquid storage tank is in communication with the heat exchanger through the outlet pipeline of the liquid storage tank. After the refrigerant in the liquid storage tank enters the heat exchanger, it exchanges heat with the cooling water circulating pipeline in the heat exchanger and then enters the cold plate inlet through the conveying pipeline.

[0008] As a further scheme of the utility model: the heat exchanger is a plate heat exchanger, the heat exchanger, the cold plate and the heat source are arranged in parallel with each other.

[0009] As a further scheme of the utility model: the opening of the mounting hole is provided with a mounting flange, the micropump is connected with the mounting hole through the mounting flange, the cold plate and the heat source are taken as the front surface, and the micropump is arranged on the back surface of the cold plate.

[0010] As a further scheme of the utility model: the back surface of the cold plate is provided with a threaded hole communicated with the cooling flow channel, the pressure sensor is fixed with the cold plate through the threaded hole, and the joint of the pressure sensor extends into the cooling flow channel.

[0011] As a further scheme of the utility model: the pressure sensor is arranged adjacent to the outlet of the cold plate.

[0012] As a further scheme of the utility model: the shell is provided with an electric interface, and the electric interface supplies power for the electric element in the shell cavity.

[0013] As a further scheme of the utility model: the shell is externally connected with a liquid supplement pipeline to supplement the refrigerant for the liquid storage tank.

[0014] As a further scheme of the utility model: the liquid storage tank inlet pipeline and / or the liquid storage tank outlet pipeline are provided with a flow regulating valve.

[0015] As a further scheme of the utility model: the micropump is a high-speed micropump.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] 1. The utility model sets the mounting hole on the cold plate, installs the micropump, makes the liquid force end of the micropump directly extend into the cooling flow channel of the cold plate from the mounting hole, thereby conveying the refrigerant, the micropump and the cold plate are integrally designed, are directly connected and fixed through the flange structure, do not need to externally connect the pipeline to connect the micropump, and do not need to externally connect the support to support the pump, thereby reducing the number of pipelines in the system, improving the product reliability, reducing the overall volume of the system, and being applicable to the scene with high space limitation.

[0018] 2. The heat source, the cold plate and the heat exchanger are arranged in layers and stacked up and down in the system shell, thereby effectively improving the space utilization rate in the shell; the refrigerant leaving the cold plate enters the heat exchanger after passing through the liquid storage tank, exchanges heat with the cooling water in the plate heat exchanger, is cooled, and thereby forms the internal circulation of the refrigerant in the shell.

[0019] 3. The micropump of the utility model is arranged on the back surface of the cold plate, is staggered with the heat source, does not interfere with each other, the pressure sensor is installed through the threaded mode, and the pressure in the cooling flow channel is monitored in real time.

[0020] 4、The utility model discloses a flow regulating valve real -time regulation refrigerant's flow, through the external liquid supplementing pipeline, the refrigerant is supplemented in the liquid storage tank at any time. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is the structure schematic drawing of the utility model.

[0022] Fig. 2 It is the structure schematic drawing of the cold plate in the utility model.

[0023] Fig. 3 It is the sectional view of the cold plate in the utility model.

[0024] In the drawing,

[0025] 1, shell;11, electric interface;

[0026] 2, cold plate;21, micropump;211, mounting flange;22, pressure sensor;

[0027] 23, cold plate entrance;24, cold plate export;25, cooling flow channel;26, mounting hole;

[0028] 3, heat source;4, heat exchanger;41, delivery pipeline;42, cooling water circulation pipeline;

[0029] 5, liquid storage tank;51, liquid storage tank inlet pipeline;52, liquid storage tank export pipeline;53, liquid supplementing pipeline. DETAILED DESCRIPTION

[0030] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0031] Please refer to Figs. 1-3 In the embodiments of the utility model, a heat dissipation system comprises a sealed shell 1, a heat source 3, a cold plate 2, a heat exchanger 4 and a liquid storage tank 5, which are arranged in the shell cavity of the shell 1, wherein the heat source 3, the cold plate 2 and the heat exchanger 4 are arranged in layers from bottom to top. The plate body of the cold plate 2 is arranged in close contact with the heat source 3, and there is a certain spacing between the cold plate 2 and the heat exchanger 4, so that the micropump 21 can be installed, and the cold plate 2 and the heat exchanger 4 are prevented from contacting and heat exchanging, and the heat exchanger 4 is preferably arranged in parallel with the heat source 3.

[0032] The liquid storage tank 5 is located on the side of the heat source 3, horizontally offset from the heat source 3, cold plate 2, and heat exchanger 4. The liquid storage tank 5 is used to store refrigerant. The liquid storage tank 5 is equipped with a liquid storage tank inlet pipe 51 and a liquid storage tank outlet pipe 52. The liquid storage tank inlet pipe 51 is connected to the cold plate inlet 23 of the cold plate 2, and the liquid storage tank outlet pipe 52 is connected to the refrigerant heat exchange pipe inside the heat exchanger 4. After exchanging heat with the cooling water inside the heat exchanger 4 through the refrigerant heat exchange pipe, the refrigerant enters the cold plate inlet 23 through the delivery pipe 41. After heat exchange in the cold plate 2, it is discharged through the cold plate outlet 24 back to the liquid storage tank inlet pipe 51, thus completing the refrigerant circulation.

[0033] The shell 1 is provided with a cooling water circulation pipe 42, which exchanges heat with the refrigerant in the heat exchanger 4 through the externally circulated cooling water. The heat exchanger 4 is preferably a plate heat exchanger with a built-in double flow channel for the flow of cooling water and refrigerant.

[0034] The housing 1 is also equipped with a liquid replenishment line 53, through which refrigerant is replenished into the liquid storage tank 5. A support frame is built into the housing 1 to support the liquid storage tank 5. The liquid storage tank 5 is equipped with a flow meter to monitor the refrigerant flow rate in real time, and a flow regulating valve is also equipped on the liquid storage tank 5 to control the refrigerant delivery flow rate.

[0035] A cooling channel 25, arranged in an S-shape, is formed in the cold plate 2, connecting the cold plate inlet 23 and the cold plate outlet 24. The surface where the cold plate 2 contacts the heat source 3 is considered the front side, and a thermally conductive interface material is provided at this surface. A mounting hole 26, communicating with the cooling channel 25, is formed on the back side of the cold plate 2. A micropump 21 is positioned at the mounting hole 26, with its hydraulic end extending into the cooling channel 25 to deliver refrigerant. The mounting hole 26 is adjacent to the cold plate outlet 24. The micropump 21 is preferably a high-speed micro-canned pump, connected and fixed to the mounting hole 26 via a mounting flange 211.

[0036] A threaded hole is also provided on the back of the cold plate 2. The pressure sensor 22 is fixed to the cold plate 2 through the threaded hole and the connector of the pressure sensor 22 extends into the cooling channel 25. The pressure sensor 22 is arranged adjacent to the outlet 24 of the cold plate. When the external cooling water needs to be driven by a pump to circulate in the heat exchanger 4, a micro pump can also be integrated on the heat exchanger 4, with the same arrangement as the micro pump 21 on the cold plate 2.

[0037] The micro-pump 21, pressure sensor 22, flow meter, and electrical interface 11 of heat source 3 are all located on housing 1. During heat dissipation, if the refrigerant flow rate is too low, the refrigerant temperature near the cold plate outlet 24 will be too high, reducing heat exchange efficiency; conversely, if the refrigerant flow rate is too high, the refrigerant will leave the cold plate quickly without sufficient heat exchange, resulting in inefficient refrigerant utilization. To find the critical flow point with the highest heat exchange efficiency, the refrigerant flow rate q is controlled in real time based on the temperature monitored by the temperature sensor.

[0038]

[0039] C is the specific heat capacity of the refrigerant in the cold plate 2;

[0040] Q is the mass flow rate of water into the cold plate 2;

[0041] Δt is the temperature difference of the refrigerant at the cold plate inlet 23 and the cold plate outlet 24;

[0042] F is the heat transfer coefficient of the cold plate 2;

[0043] t2 is the saturation temperature of the refrigerant;

[0044] t1 is the real-time temperature of the heat source 3;

[0045] ΔH is the enthalpy difference of the refrigerant at the inlet and outlet of the cold plate 2;

[0046] β is the heat exchange efficiency of the refrigerant in the heat exchanger 4.

[0047] The basic principles of the present application are described above in combination with specific embodiments, however, it should be pointed out that the advantages, advantages, effects and the like mentioned in the present application are only examples and are not limited, and these advantages, advantages, effects and the like cannot be considered as the must-have of each embodiment of the present application. In addition, the above-mentioned specific details are only for the purpose of example and for the purpose of understanding, and are not limited to the above-mentioned specific details, and the above-mentioned details do not limit the present application to the above-mentioned specific details.

[0048] The block diagrams of the devices, apparatuses, equipment, systems involved in the present application are only illustrative examples and are not intended to require or imply the connection, arrangement, configuration shown in the block diagram. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged, configured in any manner. Words such as "include", "contain", "have" and the like are open-ended words, which mean "include but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

Claims

1. A heat dissipation system, characterized by, The heat source (3) and the cold plate (2) arranged in close contact with the heat source (3) are included, a cooling flow channel (25) in the shape of S is arranged in the cold plate (2), a mounting hole (26) in communication with the cooling flow channel (25) is arranged on the surface of the cold plate (2), a micropump (21) is arranged in the mounting hole (26), and the liquid end of the micropump (21) extends from the mounting hole (26) into the cooling flow channel (25) to transport the refrigerant in the cooling flow channel (25); the cold plate inlet (23), the cooling flow channel (25), the cold plate outlet (24) and the liquid storage tank (5) are sequentially communicated to form a circulating channel of the refrigerant.

2. The heat dissipation system of claim 1, wherein, The heat source (3), the cold plate (2) and the heat exchanger (4) are sequentially stacked from bottom to top in the shell (1), there is a spacing between the cold plate (2) and the heat exchanger (4) for fixing the micropump (21), the liquid storage tank (5) is arranged on the side surface of the cold plate (2), the cold plate outlet (24) is communicated with the inlet of the liquid storage tank (5) through the liquid storage tank inlet pipeline (51), the outlet of the liquid storage tank (5) is communicated with the heat exchanger (4) through the liquid storage tank outlet pipeline (52), after the refrigerant in the liquid storage tank (5) enters the heat exchanger (4) and exchanges heat with the cooling water circulating pipeline (42) in the heat exchanger (4), the refrigerant enters the cold plate inlet (23) through the delivery pipeline (41).

3. The heat dissipation system of claim 2, wherein, The heat exchanger (4) is a plate heat exchanger, and the heat exchanger (4), the cold plate (2) and the heat source (3) are arranged in parallel with each other.

4. The heat dissipation system of any one of claims 1-3, wherein, An installation flange (211) is arranged at the opening of the mounting hole (26), the micropump (21) is connected with the mounting hole (26) through the installation flange (211), the front surface of the cold plate (2) and the heat source (3) is taken as the front surface, and the micropump (21) is arranged on the back surface of the cold plate (2).

5. The heat dissipation system of any one of claims 1-3, wherein, A threaded hole in communication with the cooling flow channel (25) is arranged on the back surface of the cold plate (2), a pressure sensor (22) is fixed with the cold plate (2) through the threaded hole in a threaded manner, and the connector of the pressure sensor (22) extends into the cooling flow channel (25).

6. The heat dissipation system of claim 5, wherein, The pressure sensor (22) is arranged adjacent to the cold plate outlet (24).

7. The heat dissipation system of any one of claims 1-3, wherein, An electrical interface (11) is arranged on the shell (1) to supply power to the electrical components in the shell cavity.

8. The heat dissipation system of any one of claims 1-3, wherein, A liquid supplement pipeline (53) is connected to the shell (1) to supplement the refrigerant in the liquid storage tank (5).

9. The heat dissipation system of any one of claims 1-3, wherein, Flow regulating valves are arranged on the liquid storage tank inlet pipeline (51) and / or the liquid storage tank outlet pipeline (52) of the liquid storage tank (5).

10. The heat dissipation system of any one of claims 1-3, wherein, The micropump (21) is a high-speed micropump.

Images