A power integrated cooling system

Abstract

The present invention relates to the field of heat dissipation, and specifically to a power-integrated heat dissipation system, including a heat source and a cold plate arranged in close contact with the heat source, an S-shaped cooling channel is provided in the cold plate, a mounting hole connected to the cooling channel is provided on the plate surface of the cold plate, a micro pump is arranged in the mounting hole, and the hydraulic end of the micro pump extends from the mounting hole into the cooling channel to transport the refrigerant in the cooling channel; the cold plate inlet, the cooling channel, the cold plate outlet, the liquid storage tank and the heat exchanger are connected in sequence to form a circulation channel for the refrigerant. The present invention integrates the cold plate with the power source for transporting the refrigerant, reduces the number of pipelines in the system, and reduces the volume of the system.

Description

Technical Field

[0001] The invention relates to the field of heat dissipation, and in particular to a power integrated heat dissipation system. Background Art

[0002] The T / R components in the radar system are one of the core components of the radar system. They are responsible for transmitting radio waves and receiving returned signals. Since these components generate a lot of heat when working, an effective heat dissipation system is required to ensure the stable operation of the components and extend their service life. In order to achieve the cooling of the T / R components, the traditional heat dissipation structure, as described in the announcement number "CN219108092U", exchanges heat between the cold plate and the heat source to achieve cooling of the heat source; parallel flow channels, series flow channels, and complex three-dimensional flow channels are usually set in the cold plate, relying on the flow of refrigerant in the flow channels inside the cold plate to remove the heat generated by the TR components through heat conduction and convection.

[0003] In order to drive the refrigerant to flow in the cold plate, an external water pump is usually connected through a pipeline at the inlet or outlet of the end of the cold plate to continuously transport the refrigerant. The external design of the water pump increases the number of pipelines. As the number of pipelines increases, the risk of leakage at the interface increases accordingly. In addition, an independent external water pump also needs to be supported separately, further increasing the volume of the system, so it needs to be solved urgently. Summary of the invention

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

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A power integrated heat dissipation system comprises a heat source and a cold plate arranged in close contact with the heat source, an S-shaped cooling channel is provided in the cold plate, a mounting hole connected to the cooling channel is provided on the plate surface of the cold plate, a micro pump is arranged in the mounting hole, and a hydraulic end of the micro pump extends from the mounting hole into the cooling channel to transport the refrigerant in the cooling channel; a cold plate inlet, a cooling channel, a cold plate outlet, a liquid storage tank and a heat exchanger are connected in sequence to form a circulation channel for the refrigerant;

[0007] The refrigerant flow rate q at the cold plate inlet is:

[0008]

[0009] Where C is the specific heat capacity of the refrigerant in the cold plate;

[0010] Q is the water mass flow rate of the cold plate;

[0011] Δt is the refrigerant temperature difference between the cold plate inlet and the cold plate outlet;

[0012] F is the heat transfer coefficient of the cold plate;

[0013] t2 is the saturation temperature of the refrigerant;

[0014] t1 is the real-time temperature of the heat source;

[0015] ΔH is the difference in refrigerant enthalpy between the inlet and outlet of the cold plate;

[0016] β is the heat transfer efficiency of the refrigerant in the heat exchanger.

[0017] As a further solution of the present invention: the heat source, the cold plate and the heat exchanger are stacked in sequence from bottom to top in the shell, there is a spacing between the cold plate and the heat exchanger for fixing the micro pump, the liquid storage tank is arranged on the side of the cold plate, the cold plate outlet is connected with the liquid storage tank inlet through the liquid storage tank inlet pipeline, the liquid storage tank outlet is connected with the heat exchanger through the liquid storage tank outlet pipeline, the refrigerant in the liquid storage tank enters the heat exchanger and exchanges heat with the cooling water circulation pipeline in the heat exchanger, and then enters the cold plate inlet through the delivery pipeline.

[0018] As a further solution of the present invention: a mounting flange is provided at the opening of the mounting hole, the micro pump is connected to the mounting hole through the mounting flange, the contact surface between the cold plate and the heat source is the front side, and the micro pump is provided on the back side of the cold plate.

[0019] As a further solution of the present invention: a threaded hole communicating with the cooling channel is opened on the back of the cold plate, the pressure sensor is fixed with the cold plate thread through the threaded hole, and the connector of the pressure sensor extends into the cooling channel.

[0020] As a further solution of the present invention: the pressure sensor is arranged adjacent to the cold plate outlet.

[0021] As a further solution of the present invention: an electrical interface is provided on the shell to supply power to the electrical components in the shell cavity.

[0022] As a further solution of the present invention, a liquid replenishing pipeline is externally connected to the shell to replenish the refrigerant in the liquid storage tank.

[0023] As a further solution of the present invention: the heat exchanger is a plate heat exchanger, and the heat exchanger, the cold plate and the heat source are arranged parallel to each other.

[0024] As a further solution of the present invention: a flow regulating valve is provided on the liquid storage tank inlet pipeline and / or the liquid storage tank outlet pipeline of the liquid storage tank.

[0025] As a further solution of the present invention: temperature sensors are provided at the cold plate inlet, the cold plate outlet and the heat source surface.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention opens a mounting hole on the cold plate and installs a micro pump, so that the hydraulic end of the micro pump directly extends from the mounting hole to the cooling channel of the cold plate, thereby transporting the refrigerant. The micro pump and the cold plate are designed as an integrated whole and are directly connected and fixed through a flange structure. There is no need for an external pipeline to connect the micro pump, and there is no need for an external bracket to support the pump, which reduces the number of pipelines in the system and improves product reliability. The overall volume of the system is reduced, which is suitable for scenes with high space restrictions. By real-time control of the refrigerant flow rate and adaptation to the real-time temperature of the heat source, the heat dissipation effect is optimized.

[0028] 2. The heat source, cold plate and heat exchanger of the present invention are stacked up and down in layers in the system shell, which effectively improves 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 for cooling, thereby forming an internal circulation of the refrigerant in the shell.

[0029] 3. The micro pump of the present invention is arranged on the back of the cold plate, so as to be offset from the heat source position and not interfere with each other. The pressure sensor is installed by means of threads to monitor the pressure in the cooling channel in real time.

[0030] 4. The present invention adjusts the flow rate of the refrigerant in real time through the flow regulating valve, and replenishes the refrigerant in the liquid storage tank at any time through the external liquid replenishing pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention.

[0032] Figure 2 It is a schematic diagram of the structure of the cold plate in the present invention.

[0033] Figure 3 It is a cross-sectional view of the cold plate in the present invention.

[0034] In the figure:

[0035] 1. Shell; 11. Electrical interface;

[0036] 2. Cold plate; 21. Micro pump; 211. Mounting flange; 22. Pressure sensor;

[0037] 23. Cold plate inlet; 24. Cold plate outlet; 25. Cooling channel; 26. Mounting hole;

[0038] 3. Heat source; 4. Heat exchanger; 41. Transport pipeline; 42. Cooling water circulation pipeline;

[0039] 5. Liquid storage tank; 51. Liquid storage tank inlet pipeline; 52. Liquid storage tank outlet pipeline; 53. Liquid replenishment pipeline. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0041] See also Figures 1 to 3 In an embodiment of the present invention, a power integrated heat dissipation system includes a sealed housing 1, a heat source 3, a cold plate 2, a heat exchanger 4, and a liquid storage tank 5, all of which are arranged in a shell cavity of the housing 1, wherein the heat source 3, the cold plate 2, and the heat exchanger 4 are arranged in layers from bottom to top. The body of the cold plate 2 is arranged in close contact with the heat source 3, and there is a certain distance between the cold plate 2 and the heat exchanger 4, so that the micro pump 21 can be installed while avoiding contact between the cold plate 2 and the heat exchanger 4 for heat exchange. The heat exchanger 4 is preferably arranged in parallel with the heat source 3.

[0042] The liquid storage tank 5 is arranged on the side of the heat source 3, and is staggered in horizontal position with the heat source 3, the cold plate 2 and the heat exchanger 4. The liquid storage tank 5 is used to store refrigerant. The liquid storage tank 5 is provided with a liquid storage tank inlet pipeline 51 and a liquid storage tank outlet pipeline 52. The liquid storage tank inlet pipeline 51 is connected to the cold plate inlet 23 of the cold plate 2, and the liquid storage tank outlet pipeline 52 is connected to the refrigerant heat exchange pipeline in the heat exchanger 4. After the refrigerant exchanges heat with the cooling water in the heat exchanger 4 through the refrigerant heat exchange pipeline in the heat exchanger 4, it enters the cold plate inlet 23 through the delivery pipeline 41, and after heat exchange in the cold plate 2, it is discharged to the liquid storage tank inlet pipeline 51 through the cold plate outlet 24, thereby completing the circulation of the refrigerant.

[0043] The shell 1 is provided with a cooling water circulation pipeline 42, through which the externally circulated cooling water exchanges heat with the refrigerant in the heat exchanger 4. The heat exchanger 4 is preferably a plate heat exchanger with a built-in double flow channel for the cooling water and the refrigerant to flow.

[0044] The shell 1 is also provided with a liquid replenishing pipeline 53, through which the refrigerant is replenished into the liquid storage tank 5, and the shell 1 is built with a support frame to support the liquid storage tank 5. The liquid storage tank 5 is provided with a flow meter to monitor the refrigerant flow in real time, and the liquid storage tank 5 is also provided with a flow regulating valve to control the delivery flow of the refrigerant.

[0045] A cooling channel 25 arranged in an S-shaped direction is provided in the cold plate 2, and the cooling channel 25 connects the cold plate inlet 23 and the cold plate outlet 24. The bonding surface between the cold plate 2 and the heat source 3 is taken as the front side, and a thermal interface material is provided at the bonding surface between the cold plate 2 and the heat source 3. A mounting hole 26 connected to the cooling channel 25 is provided on the back side of the cold plate 2, and a micro pump 21 is provided at the mounting hole 26, and the hydraulic end of the micro pump 21 extends into the cooling channel 25 to transport the refrigerant, and the mounting hole 26 is arranged adjacent to the cold plate outlet 24. The micro pump 21 is preferably a high-speed micro shielded pump, which is connected and fixed to the mounting hole 26 through a mounting flange 211.

[0046] A threaded hole is also provided on the back of the cold plate 2, and 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 cold plate outlet 24. When the external cooling water needs to be pumped and circulated in the heat exchanger 4, a micro pump can also be integrated on the heat exchanger 4, which is arranged in the same manner as the micro pump 21 on the cold plate 2.

[0047] The micro pump 21, the pressure sensor 22, the flow meter and the electrical interface 11 of the heat source 3 are all placed on the housing 1. During the heat dissipation process, if the refrigerant flow rate is too low, the refrigerant temperature near the cold plate outlet 24 will be too high, and the heat exchange efficiency will be reduced; if the refrigerant flow rate is too high, the refrigerant will leave the cold plate quickly without sufficient heat exchange, and the refrigerant will not be fully utilized. In order to find the critical point of the flow rate when the heat exchange efficiency is the highest, the refrigerant flow rate q is controlled in real time according to the monitoring temperature of the temperature sensor:

[0048]

[0049] Wherein, C is the specific heat capacity of the refrigerant in the cold plate 2;

[0050] Q is the water mass flow rate of cold plate 2;

[0051] Δt is the refrigerant temperature difference between the cold plate inlet 23 and the cold plate outlet 24;

[0052] F is the heat transfer coefficient of cold plate 2;

[0053] t2 is the saturation temperature of the refrigerant;

[0054] t1 is the real-time temperature of heat source 3;

[0055] ΔH is the refrigerant enthalpy difference between the inlet and outlet of cold plate 2;

[0056] β is the heat exchange efficiency of the refrigerant in the heat exchanger 4.

[0057] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0058] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

Claims

1. A power integrated cooling system, characterized in that: The invention comprises a heat source (3) and a cold plate (2) arranged in close contact with the heat source (3); an S-shaped cooling channel (25) is provided in the cold plate (2); a mounting hole (26) connected to the cooling channel (25) is provided on the plate surface of the cold plate (2); a micro pump (21) is arranged in the mounting hole (26); and a hydraulic end of the micro pump (21) extends from the mounting hole (26) into the cooling channel (25) to transport the refrigerant in the cooling channel (25); a cold plate inlet (23), a cooling channel (25), a cold plate outlet (24), a liquid storage tank (5) and a heat exchanger (4) are connected in sequence to form a circulation channel for the refrigerant; The refrigerant flow rate q at the cold plate inlet (23) is: Wherein, C is the specific heat capacity of the refrigerant in the cold plate (2); Q is the water mass flow rate of the cold plate (2); Δt is the refrigerant temperature difference between the cold plate inlet (23) and the cold plate outlet (24); F is the heat transfer coefficient of the cold plate (2); t2 is the saturation temperature of the refrigerant; t1 is the real-time temperature of the heat source (3); ΔH is the difference in refrigerant enthalpy between the inlet and outlet of the cold plate (2); β is the heat exchange efficiency of the refrigerant in the heat exchanger (4).

2. A power integrated cooling system according to claim 1, characterized in that: The heat source (3), the cold plate (2) and the heat exchanger (4) are stacked in sequence from bottom to top in the shell (1); a spacing exists between the cold plate (2) and the heat exchanger (4) for fixing the micro pump (21); the liquid storage tank (5) is arranged on the side of the cold plate (2); the cold plate outlet (24) is connected to the liquid storage tank (5) inlet via a liquid storage tank inlet pipeline (51); the liquid storage tank (5) outlet is connected to the heat exchanger (4) via a liquid storage tank outlet pipeline (52); the refrigerant in the liquid storage tank (5) enters the heat exchanger (4), exchanges heat with the cooling water circulation pipeline (42) in the heat exchanger (4), and then enters the cold plate inlet (23) via the delivery pipeline (41).

3. A power integrated cooling system according to claim 1 or 2, characterized in that: A mounting flange (211) is provided at the opening of the mounting hole (26), and the micro pump (21) is connected to the mounting hole (26) via the mounting flange (211). The micro pump (21) is arranged on the back side of the cold plate (2) with the contact surface between the cold plate (2) and the heat source (3) being the front side.

4. A power integrated cooling system according to claim 3, characterized in that: A threaded hole communicating with the cooling channel (25) is provided on the back of the cold plate (2), the pressure sensor (22) is fixed to the cold plate (2) by threaded engagement through the threaded hole, and the connector of the pressure sensor (22) extends into the cooling channel (25).

5. A power integrated cooling system according to claim 4, characterized in that: The pressure sensor (22) is arranged adjacent to the cold plate outlet (24).

6. A power integrated cooling system according to claim 1 or 2, characterized in that: The shell (1) is provided with an electrical interface (11) for supplying power to the electrical components in the shell cavity.

7. A power integrated cooling system according to claim 1 or 2, characterized in that: The shell (1) is externally connected to a liquid replenishing pipeline (53) for replenishing the refrigerant in the liquid storage tank (5).

8. A power integrated cooling system according to claim 1 or 2, characterized in that: 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.

9. A power integrated cooling system according to claim 1 or 2, characterized in that: A flow regulating valve is provided on the liquid storage tank inlet pipeline (51) and / or the liquid storage tank outlet pipeline (52) of the liquid storage tank (5).

10. A power integrated cooling system according to claim 1 or 2, characterized in that: Temperature sensors are provided at the cold plate inlet (23), the cold plate outlet (24) and the surface of the heat source (3).

Images