Cold plate heat dissipation performance detection experiment table

Abstract

The utility model discloses a cold plate heat dissipation performance detection experiment table, which comprises a main loop and a detection unit, the main loop comprises a liquid storage tank, and a fluorine pump, a first flow regulating valve, a turbine flowmeter, a supercooling heat exchange piece, a liquid distribution pipe, a liquid collection pipe and a condensation heat exchange piece which are sequentially communicated with the liquid outlet end of the liquid storage tank, and the condensation heat exchange piece is communicated with the liquid inlet end of the liquid storage tank. Wherein at least two cold plates are connected between the liquid distribution pipe and the liquid collection pipe in parallel, the two cold plates make contact with two heat sources correspondingly, and the supercooling heat exchange piece and the condensation heat exchange piece are both used for conducting heat exchange with refrigerants in a main loop; the detection unit comprises two first temperature sensors, and the two first temperature sensors are arranged at the liquid inlet end of the liquid distribution pipe and the liquid outlet end of the liquid collection pipe respectively. The problem that the heat dissipation performance of the cold plate is inconvenient to test in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of hot plate heat dissipation testing technology, specifically to a test bench for testing the heat dissipation performance of cold plates. Background Technology

[0002] Cold plate cooling is a cooling technology commonly used in electronic devices, particularly high-performance computing systems, data center servers, and industrial applications requiring efficient heat dissipation. This technology uses a thermally conductive metal plate (usually copper or aluminum) to conduct heat from a heat source (such as a CPU or other heat-generating components) to a cold plate, where it is then dissipated through liquid cooling or airflow.

[0003] Cold plate heat dissipation testing is a method used to evaluate the heat dissipation performance of electronic devices. This test is usually conducted during the research and development phase to ensure that the product will not overheat under normal operating conditions. However, due to the many factors affecting the heat dissipation performance of cold plates, testing is relatively inconvenient, and it is difficult to test the heat dissipation performance of cold plates under different operating conditions during the testing phase. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a test bench for testing the heat dissipation performance of cold plates, thereby solving the problem that it is inconvenient to test the heat dissipation performance of cold plates in the prior art.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a test bench for testing the heat dissipation performance of cold plates, including a main circuit and a testing unit. The main circuit includes a liquid storage tank, and the outlet end of the liquid storage tank is sequentially connected to a refrigerant pump, a first flow regulating valve, a turbine flow meter, a subcooling heat exchanger, a distributor pipe, a collector pipe, and a condensing heat exchanger. The condensing heat exchanger is connected to the inlet end of the liquid storage tank. At least two cold plates are connected in parallel between the distributor pipe and the collector pipe, and the two cold plates are in contact with two heat sources respectively. The subcooling heat exchanger and the condensing heat exchanger are both used to exchange heat with the refrigerant in the main circuit. The testing unit includes two first temperature sensors, which are respectively located at the inlet end of the distributor pipe and the outlet end of the collector pipe.

[0007] In some embodiments, the subcooled heat exchanger includes a subcooled plate heat exchanger and a subcooling circuit. One fluid channel of the plate heat exchanger is connected to the main circuit. The subcooling circuit includes a first chiller, a storage tank, and a first water pump connected in sequence. The outlet end of another fluid channel of the plate heat exchanger is connected to the first chiller, and the inlet end of another fluid channel of the plate heat exchanger is connected to the first water pump. A first heating rod is connected to the storage tank.

[0008] In some embodiments, a third temperature sensor is provided between the subcooled plate heat exchanger and the liquid distribution pipe, and the third temperature sensor is electrically connected to the first heating rod via a first PID.

[0009] In some embodiments, the condensing heat exchanger includes a condensing plate heat exchanger and a condensing circuit. One fluid channel of the condensing plate heat exchanger is connected to the main circuit. The condensing circuit includes a second chiller, a storage tank, a second water pump, and a float flow meter connected in sequence. The outlet end of another fluid channel of the condensing plate heat exchanger is connected to the second chiller, and the inlet end of another fluid channel of the condensing plate heat exchanger is connected to the float flow meter. A second heating rod is connected to the storage tank.

[0010] In some embodiments, the inlet end of the second chiller and the outlet end of the float flowmeter are respectively provided with a fourth temperature sensor and a fifth temperature sensor, and the fifth temperature sensor is electrically connected to the second heating rod via a second PID.

[0011] In some embodiments, a first pressure sensor is provided between the subcooled plate heat exchanger and the liquid distribution pipe, and the liquid distribution pipe and the liquid collection pipe are respectively connected to a second pressure sensor and a third pressure sensor.

[0012] In some embodiments, a first differential pressure gauge is provided between the liquid inlet end and the liquid outlet end of both cold plates.

[0013] In some embodiments, a second differential pressure gauge is also connected between the inlet end of the separator and the outlet end of the collecting pipe.

[0014] In some embodiments, a filter is provided between the fluorine pump and the first flow regulating valve.

[0015] In some embodiments, the outlet of the filter is also connected to the inlet of the storage tank via a second flow regulating valve.

[0016] Compared with the prior art, the present invention provides a test bench for testing the heat dissipation performance of a cold plate. By controlling the temperature of the refrigerant entering the cold plate inlet and the heating power of the heat source, different operating conditions are simulated. Specifically, the subcooling heat exchanger exchanges heat with the refrigerant in the main circuit to bring the refrigerant to the temperature required for testing. The contact between the cold plate and the heat source can cause the refrigerant to undergo phase transformation into gaseous or gas-liquid two-phase heating. The condensing heat exchanger exchanges heat with the refrigerant in the main circuit to condense the gaseous refrigerant into liquid refrigerant for recycling. Two first temperature sensors are respectively located at the inlet end of the liquid distribution pipe and the outlet end of the liquid collection pipe. The changes in the refrigerant temperature can be detected by the two first temperature sensors, thereby detecting the heat dissipation performance of the cold plate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a cold plate heat dissipation performance testing platform provided in an embodiment of this utility model. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0019] To address the technical problem of the inconvenience in testing the heat dissipation performance of cold plates in existing technologies, this invention provides a cold plate heat dissipation performance testing platform, which can simulate different open environments to test the heat dissipation performance of cold plates.

[0020] Please see Figure 1 , Figure 1 This invention relates to a test bench for testing the heat dissipation performance of a cold plate, comprising a main circuit and a testing unit. The main circuit includes a liquid storage tank 11, and the outlet end of the liquid storage tank 11 is sequentially connected to a refrigerant pump 12, a first flow regulating valve 13, a turbine flow meter 14, a subcooling heat exchanger 15, a distribution pipe 16, a collection pipe 17, and a condensing heat exchanger 18. The condensing heat exchanger 18 is connected to the inlet end of the liquid storage tank 11. At least two cold plates 19 are connected in parallel between the distribution pipe 16 and the collection pipe 17, and the two cold plates 19 are in contact with two heat sources 20 respectively. The subcooling heat exchanger 15 and the condensing heat exchanger 18 are both used for heat exchange with the refrigerant in the main circuit. The testing unit includes two first temperature sensors 21, which are respectively located at the inlet end of the distribution pipe 16 and the outlet end of the collection pipe 17.

[0021] The liquid storage tank 11 is used to store liquid refrigerant, and the refrigerant pump 12 provides power for the refrigerant circulation.

[0022] The first flow regulating valve 13 is used to control the opening degree to control the flow rate into the system, and the turbine flow meter 14 is used to read the flow rate of the refrigeration unit.

[0023] In this specific embodiment, the heat source and the cold plate are in contact through a thermally conductive material. The liquid refrigerant flowing through the cold plate absorbs heat and transforms into a gas-liquid two-phase refrigerant, thereby achieving a heat dissipation effect.

[0024] It should be noted that the refrigerant in the storage tank 11 is delivered by the fluorine pump 12, the first flow regulating valve 13 can regulate the flow rate through the cold plate, the subcooling heat exchanger 15 can exchange heat with the refrigerant in the main circuit to make the refrigerant reach the required test temperature, the heat dissipation of the cold plate 19 can heat the refrigerant in the main circuit to change the phase to gas or gas-liquid two phases, and the condensing heat exchanger 18 condenses the gas phase refrigerant into liquid phase refrigerant so that the refrigerant can be recycled.

[0025] In this specific embodiment, the subcooled heat exchanger 15 includes a subcooled plate heat exchanger 151 and a subcooling circuit. One fluid channel of the plate heat exchanger is connected to the main circuit. The subcooling circuit includes a first chiller 152, a liquid storage tank 153, and a first water pump 154 ​​connected in sequence. The liquid outlet of the other fluid channel of the plate heat exchanger is connected to the first chiller 152, and the liquid inlet of the other fluid channel of the plate heat exchanger is connected to the first water pump 154. A first heating rod 155 is connected to the liquid storage tank 153.

[0026] It should be noted that the refrigerant can flow in one fluid channel of the cold plate heat exchanger, the liquid storage tank 153 contains cooling water, the first heating rod 155 can heat the cooling water in the liquid storage tank 153; the first chiller 152 can cool the cooling water; the temperature of the refrigerant entering the cold plate can be adjusted by exchanging heat with the cooling water in another fluid channel.

[0027] Based on the above scheme, a third temperature sensor 23 is further provided between the subcooled plate heat exchanger 151 and the liquid distribution pipe 16, and the third temperature sensor 23 is electrically connected to the first heating rod 155 via a first PID controller. It should be noted that when the third temperature sensor 23 detects that the refrigerant temperature is lower than the temperature required for testing, the first PID controller can control the first heating rod 155 to heat the cooling water in the liquid storage tank 153.

[0028] In this specific embodiment, the condensing heat exchanger 18 includes a condensing plate heat exchanger 181 and a condensing circuit. One fluid channel of the condensing plate heat exchanger 181 is connected to the main circuit. The condensing circuit includes a second chiller 182, a liquid storage tank 183, a second water pump 184, and a float flow meter 185 connected in sequence. The liquid outlet of the other fluid channel of the condensing plate heat exchanger 181 is connected to the second chiller 182, and the liquid inlet of the other fluid channel of the condensing plate heat exchanger 181 is connected to the float flow meter 185. A second heating rod 186 is connected to the liquid storage tank 183.

[0029] It should be noted that the refrigerant can flow in one fluid channel of the condenser plate heat exchanger 181, and the liquid storage tank 183 contains cooling water. Under the action of the second water pump 184, the cooling water can flow in another fluid channel of the condenser plate heat exchanger 181. The cooling water exchanges heat with the refrigerant, condensing the gaseous refrigerant into a liquid refrigerant.

[0030] Based on the above scheme, the inlet end of the second chiller 182 and the outlet end of the float flowmeter 185 are respectively equipped with a fourth temperature sensor 24 and a fifth temperature sensor 25. The fifth temperature sensor 25 is electrically connected to the second heating rod 186 via a second PID controller. Specifically, when the fifth temperature sensor detects that the temperature of the cooling water supplied to the condenser plate heat exchanger 181 is too low, which could easily cause the refrigerant to become too cold, the second heating rod 186 can be controlled by the second PID controller to heat the cooling water in the storage tank 183.

[0031] In this specific embodiment, a first pressure sensor 26 is provided between the subcooled plate heat exchanger 151 and the liquid distribution pipe 16. The liquid distribution pipe 16 and the liquid collection pipe 17 are respectively connected to a second pressure sensor 27 and a third pressure sensor 28. The pressure value of the refrigerant in the main circuit can be read through the first pressure sensor 26, the second pressure sensor 27 and the third pressure sensor 28.

[0032] Based on the above scheme, a first differential pressure gauge 29 is provided between the liquid inlet and liquid outlet of both cold plates 19, and a second differential pressure gauge 30 is connected between the liquid inlet of the liquid distributor 16 and the liquid outlet of the liquid collector 17. The resistance value between the liquid inlet and liquid outlet of the cold plate 19 can be read by the first differential pressure gauge 29, and the resistance value between the liquid inlet of the liquid distributor 16 and the liquid outlet of the liquid collector 17 can be read by the second differential pressure gauge 30.

[0033] Based on the above scheme, in order to filter out excess water in the main circuit, a filter 31 is specifically provided between the fluoride pump 12 and the first flow regulating valve 13; in addition, the outlet of the filter 31 is also connected to the inlet of the storage tank 11 via the second flow regulating valve 32.

[0034] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A test bench for testing the heat dissipation performance of a cold plate, comprising a main circuit and a testing unit, wherein the main circuit includes a liquid storage tank, characterized in that, The outlet end of the storage tank is sequentially connected to a fluorine pump, a first flow regulating valve, a turbine flow meter, a subcooling heat exchanger, a distributor pipe, a collector pipe, and a condensing heat exchanger. The condensing heat exchanger is connected to the inlet end of the storage tank. At least two cold plates are connected in parallel between the distributor pipe and the collector pipe. The two cold plates are in contact with two heat sources respectively. Both the subcooling heat exchanger and the condensing heat exchanger are used to exchange heat with the refrigerant in the main circuit. The detection unit includes two first temperature sensors, which are respectively located at the inlet end of the liquid separator and the outlet end of the liquid collector.

2. The experimental platform for testing the heat dissipation performance of a cold plate according to claim 1, characterized in that, The subcooled heat exchanger includes a subcooled plate heat exchanger and a subcooling circuit. One fluid channel of the plate heat exchanger is connected to the main circuit. The subcooling circuit includes a first chiller, a liquid storage tank, and a first water pump connected in sequence. The liquid outlet of the other fluid channel of the plate heat exchanger is connected to the first chiller, and the liquid inlet of the other fluid channel of the plate heat exchanger is connected to the first water pump. A first heating rod is connected to the liquid storage tank.

3. The experimental platform for testing the heat dissipation performance of a cold plate according to claim 2, characterized in that, A third temperature sensor is also provided between the subcooled plate heat exchanger and the liquid distribution pipe, and the third temperature sensor is electrically connected to the first heating rod via a first PID.

4. The experimental platform for testing the heat dissipation performance of a cold plate according to claim 1 or 3, characterized in that, The condensing heat exchanger includes a condensing plate heat exchanger and a condensing circuit. One fluid channel of the condensing plate heat exchanger is connected to the main circuit. The condensing circuit includes a second chiller, a liquid storage tank, a second water pump, and a float flow meter connected in sequence. The liquid outlet of the other fluid channel of the condensing plate heat exchanger is connected to the second chiller, and the liquid inlet of the other fluid channel of the condensing plate heat exchanger is connected to the float flow meter. A second heating rod is connected to the liquid storage tank.

5. The experimental platform for testing the heat dissipation performance of a cold plate according to claim 4, characterized in that, The second chiller's inlet end and the float flow meter's outlet end are respectively equipped with a fourth temperature sensor and a fifth temperature sensor, and the fifth temperature sensor is electrically connected to the second heating rod via a second PID.

6. The experimental platform for testing the heat dissipation performance of a cold plate according to claim 2, characterized in that, A first pressure sensor is provided between the subcooled plate heat exchanger and the liquid distribution pipe, and a second pressure sensor and a third pressure sensor are respectively connected to the liquid distribution pipe and the liquid collection pipe.

7. The experimental platform for testing the heat dissipation performance of a cold plate according to claim 1, characterized in that, A first differential pressure gauge is installed between the liquid inlet and liquid outlet of both cold plates.

8. The experimental platform for testing the heat dissipation performance of a cold plate according to claim 1, characterized in that, A second differential pressure gauge is also connected between the inlet end of the liquid separator and the outlet end of the liquid collector.

9. The experimental platform for testing the heat dissipation performance of a cold plate according to claim 1, characterized in that, A filter is provided between the fluorine pump and the first flow regulating valve.

10. The experimental platform for testing the heat dissipation performance of a cold plate according to claim 9, characterized in that, The outlet of the filter is also connected to the inlet of the storage tank via a second flow regulating valve.

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