A two-phase liquid cooling system and cooling device

Abstract

The utility model relates to a kind of two-phase liquid cooling system and cooling equipment, it is related to cold plate type liquid cooling technical field, the two-phase liquid cooling system includes gas-liquid separator, condenser, pump, evaporator;Gas phase outlet of gas-liquid separator is communicated to the refrigerant inlet of condenser;The refrigerant outlet of condenser is communicated to pump;Liquid phase outlet of gas-liquid separator is communicated to the refrigerant inlet of pump;The refrigerant outlet of pump is communicated to the refrigerant inlet of evaporator, and the refrigerant outlet of evaporator is communicated to the inlet of gas-liquid separator.The cooling equipment contains the two-phase liquid cooling system described above.The utility model directly connects between the liquid phase outlet of gas-liquid separator and condenser and pump, so that the liquid phase separated by gas-liquid separator does not pass through condenser, so that the total amount of fluid passing through condenser is reduced, and the technical problem of low two-phase heat exchange efficiency in condenser caused by the refrigerant of liquid phase not participating in heat exchange is avoided, and the heat exchange coefficient in condenser is improved.

Description

Technical Field

[0001] This utility model relates to the field of cold plate liquid cooling technology, and in particular to a two-phase liquid cooling system and cooling equipment. Background Technology

[0002] With the rapid development of 5G, cloud computing, and artificial intelligence, the computing power of data centers is growing rapidly, driving the accelerated iteration of AI chips. The improvement in chip performance is accompanied by a significant increase in power consumption. The stable and secure operation of servers relies on a good cooling system, but with the increase in power, traditional air cooling can no longer meet the demands. Liquid cooling technology, especially cold plate liquid cooling technology, is showing rapid development. Two-phase cold plates are considered the main technical route for the further development of cold plate liquid cooling technology because of their stronger heat exchange capacity than single-phase cold plates and the absence of risks such as medium aging and leakage associated with single-phase cold plates.

[0003] Two-phase cold plate liquid cooling circulation system, such as Figure 1 As shown, the refrigerant liquid discharged from the refrigerant pump enters the cold plate through the pipeline. To prevent cavitation during the pumping process, the liquid entering the refrigerant pump has a large degree of subcooling. This results in the refrigerant liquid entering the cold plate having a large degree of subcooling, and its corresponding lgP-h is as follows. Figure 2 As shown, the supercooled liquid first absorbs heat and heats up to become a saturated liquid in the cold plate, and then evaporates and vaporizes into the two-phase region. The presence of the refrigerant liquid has the following adverse effects: due to the large temperature difference between the refrigerant liquid and the refrigerant in the two-phase region, the surface temperature of the cold plate is uneven; the refrigerant liquid may flash in the cold plate, resulting in unstable flow.

[0004] To address this issue, some existing technologies employ a gas-liquid separator to separate and compress the gas phase discharged from the evaporator. This gas is then mixed with subcooled refrigerant supplied by a refrigerant pump to reduce subcooling before being introduced into the evaporator. However, this structure suffers from a problem where the liquid phase separated by the gas-liquid separator directly enters the condenser along with the two-phase refrigerant from the cold-plate evaporator. The liquid refrigerant does not participate in heat exchange within the condenser, directly impacting the two-phase heat exchange within the condenser. Therefore, existing technologies still suffer from low condenser operating efficiency, resulting in high energy consumption. Utility Model Content

[0005] In view of this, the present invention provides a two-phase liquid cooling system and cooling equipment. The main purpose is to effectively improve the efficiency of the condenser.

[0006] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0007] On one hand, embodiments of this utility model provide a two-phase liquid cooling system, comprising:

[0008] Gas-liquid separator;

[0009] Condenser: The gas phase outlet of the gas-liquid separator is connected to the refrigerant inlet of the condenser;

[0010] Pump: The refrigerant outlet of the condenser is connected to the pump; the liquid phase outlet of the gas-liquid separator is connected to the refrigerant inlet of the pump;

[0011] Evaporator: The refrigerant outlet of the pump is connected to the refrigerant inlet of the evaporator, and the refrigerant outlet of the evaporator is connected to the inlet of the gas-liquid separator.

[0012] Furthermore, it also includes a compressor, and the gas phase outlet of the gas-liquid separator is connected to the refrigerant inlet of the evaporator via the compressor 4.

[0013] Furthermore, it also includes a subcooler, which is located between the condenser and the pump.

[0014] Furthermore, the liquid phase outlet of the gas-liquid separator 1 is connected to the upstream of the subcooler.

[0015] Furthermore, it also includes a housing, in which the compressor and pump are installed, and the housing is provided with a first inlet, a second inlet and a discharge outlet;

[0016] The compressor's suction port is connected to the first inlet, which in turn connects to the gas phase outlet of the gas-liquid separator.

[0017] The pump's refrigerant inlet is connected to the second inlet, which in turn connects to the condenser's refrigerant outlet.

[0018] The refrigerant outlet of the compressor and the refrigerant outlet of the pump are connected to the discharge port, which in turn connects to the refrigerant inlet of the evaporator.

[0019] Furthermore, the compressor and pump can be driven coaxially or non-coaxially.

[0020] Furthermore, the refrigerant outlet of the compressor and the refrigerant outlet of the pump are connected to the discharge port via connecting pipes.

[0021] Furthermore, the compressor and pump are housed in different housings and connected by a manifold, which has an opening leading to the refrigerant inlet of the evaporator.

[0022] Furthermore, the evaporator includes a cold plate evaporator assembly, which may be one or at least two cold plate evaporator assemblies.

[0023] Furthermore, when there are at least two cold plate evaporator groups, the at least two cold plate evaporator groups are connected in parallel.

[0024] Furthermore, it also includes inlet and outlet pipelines. The refrigerant outlet of the pump and the refrigerant outlet of the compressor are respectively connected to the inlet pipeline through pipelines. One or at least two first connection ports are provided on the inlet pipeline, and the inlet of the cold plate evaporator group is connected to the first connection port one by one.

[0025] A second connection port is provided on the outlet pipeline, and the outlets of at least two cold plate evaporator groups are connected to the second connection port one by one. The other end of the outlet pipeline is connected to the gas-liquid separator.

[0026] Furthermore, the inlet conduit includes:

[0027] The pump outlet and the compressor refrigerant outlet are connected in parallel to the first end of the merging chamber;

[0028] A connecting branch is provided, which may be one or at least two. The first end of the connecting branch is connected to the second end of the merging cavity, and the second end of the connecting branch is provided with a first connection port.

[0029] Furthermore, the ratio of the compressor's discharge pressure to its intake pressure is 1.05-1.5.

[0030] Furthermore, using a volumetric flow meter, the ratio of the refrigerant outlet flow rate of the compressor to the refrigerant outlet flow rate of the pump is (1-12):1.

[0031] Furthermore, when R134a or R515B is used as the refrigerant, the ratio of the refrigerant outlet flow rate of the compressor to the refrigerant outlet flow rate of the pump is (1-5):1.

[0032] When R1233zd(E) is used as the refrigerant, the ratio of the refrigerant outlet flow rate of the compressor to the refrigerant outlet flow rate of the pump is (4-12):1.

[0033] Furthermore, a throttling device is installed downstream of the liquid phase outlet of the gas-liquid separator.

[0034] Compared with the prior art, the two-phase liquid cooling system of this utility model has at least the following beneficial effects:

[0035] The two-phase liquid cooling system provided in this embodiment of the utility model directly connects the liquid phase outlet of the gas-liquid separator to the pump, so that the liquid phase separated by the gas-liquid separator does not pass through the condenser. While reducing the total amount of fluid passing through the condenser, only the gas phase refrigerant enters the condenser, thus avoiding the technical problem of low two-phase heat exchange efficiency in the condenser caused by the liquid phase refrigerant not participating in heat exchange, and improving the heat exchange coefficient in the condenser.

[0036] Furthermore, by installing a throttling device downstream of the liquid phase outlet of the gas-liquid separator, the delivery pressure of the liquid phase flowing out of the solid-liquid separator can be controlled, allowing the liquid phase in the solid-liquid separator to enter the upstream delivery pipeline of the pump at a relatively stable flow rate and pressure, thus avoiding the adverse effects on the pump caused by the instability of the fluid in the delivery pipeline due to the convergence of two branches.

[0037] Furthermore, this invention provides a subcooler in the delivery pipeline to further subcool the liquid phase separated by the gas-liquid separator, thereby ensuring the subcooling of the refrigerant entering the pump and preventing cavitation.

[0038] Furthermore, this invention, by setting up an inlet pipeline, allows the subcooled refrigerant fluid delivered by the pump to mix evenly with the superheated refrigerant fluid delivered by the compressor. This ensures that the subcooling degree of the refrigerant fluid entering different cold plate evaporator groups remains consistent, improving the safety and stability of the entire system operation. By setting a reasonable ratio between the cross-sectional area of ​​the inlet cavity and the sum of the cross-sectional areas of the pipeline at the pump outlet and the second end of the compressor, it ensures that the two fluids mix evenly while avoiding large pressure changes in the two-phase refrigerant fluids due to an excessively large cross-sectional area of ​​the inlet cavity.

[0039] On the other hand, some embodiments of this utility model also disclose a cooling device, which includes the aforementioned two-phase liquid cooling system. Its beneficial effects are the same as those of the aforementioned two-phase liquid cooling system, and will not be repeated here.

[0040] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of a two-phase liquid cooling system provided by existing technology;

[0042] Figure 2 This is an lgP-h diagram corresponding to a two-phase liquid cooling system provided by existing technology;

[0043] Figure 3 This is a schematic diagram of the structure of a two-phase liquid cooling system provided in an embodiment of the present invention;

[0044] Figure 4 for Figure 3 The figure shown is an lgP-h diagram corresponding to a two-phase liquid cooling system.

[0045] Figure 5 This is a schematic diagram of the structure of a two-phase liquid cooling system provided in an embodiment of the present invention;

[0046] Figure 6 for Figure 5 The figure shown is an lgP-h diagram corresponding to a two-phase liquid cooling system.

[0047] Figure 7 This is a schematic diagram of the structure of the inlet pipe of a two-phase liquid cooling system according to an embodiment of the present invention;

[0048] Figure 8 This is a schematic diagram of a two-phase liquid cooling system provided in an embodiment of the present invention, in which the compressor and pump are housed in the same housing. Detailed Implementation

[0049] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0050] Example 1

[0051] This embodiment provides a two-phase liquid cooling system, such as Figure 3 , Figure 5 As shown, the two-phase liquid cooling system of this embodiment includes a gas-liquid separator 1, a pump 2, an evaporator 5, and a condenser 3. The gas-liquid separator 1 is used to separate the two-phase refrigerant output from the evaporator 5 before it enters the condenser 3. The gas phase outlet of the gas-liquid separator 1 is connected to the refrigerant inlet of the condenser 3; the refrigerant outlet of the condenser 3 is connected to the pump 2; the liquid phase outlet of the gas-liquid separator 1 is connected to the refrigerant inlet of the pump 2; the refrigerant outlet of the pump 2 is connected to the refrigerant inlet of the evaporator 5; and the refrigerant outlet of the evaporator 5 is connected to the inlet of the gas-liquid separator 1. During operation, the two-phase refrigerant that comes out after heat exchange in the evaporator 5 first enters the gas-liquid separator 1 for gas-liquid separation. The gas phase enters the condenser 3 and condenses into a liquid phase, which mixes with the liquid phase refrigerant from the gas-liquid separator and then enters the refrigerant inlet of the pump, and is pumped into the evaporator. In this embodiment, by directly connecting the liquid phase outlet of the gas-liquid separator to the pump, the liquid phase separated by the gas-liquid separator does not pass through the condenser. While reducing the total amount of fluid passing through the condenser, only the gaseous refrigerant enters the condenser. This avoids the technical problem of low two-phase heat exchange efficiency in the condenser caused by the liquid phase refrigerant not participating in heat exchange, and improves the heat exchange coefficient in the condenser.

[0052] In this embodiment, the evaporator can be installed inside the liquid-cooled server to cool the internal components. Piping can be connected via quick-connect fittings, which can be mounted on the liquid-cooled cabinet. The compressor and pump can be installed inside the cabinet or independently outside the cabinet. The condenser can be located outside the cabinet or outside the server room. In some preferred embodiments, to control the subcooling of the two-phase refrigerant entering the evaporator and avoid uneven surface temperature of the cold plate caused by excessive subcooling, a portion of the gaseous refrigerant from the gas-liquid separator 1 can be compressed by the compressor and mixed with the refrigerant from the pump's outlet before being introduced into the evaporator. This effectively reduces the subcooling of the two-phase refrigerant entering the evaporator, preventing flash evaporation of the refrigerant liquid in the cold plate and thus improving heat exchange efficiency.

[0053] Example 2

[0054] This embodiment discloses a two-phase liquid cooling system. Based on the above embodiment, a delivery pipeline 9 can be provided at the fluid inlet of pump 2. The liquid phase outlet of gas-liquid separator 1 is connected to the delivery pipeline 9 through a first pipeline 7, and a throttling device 6 is provided on the first pipeline 7 to reduce the pressure of the fluid in the first pipeline 7, so that it has a lower pressure and flow rate when entering the delivery pipeline 9. The gas phase outlet of gas-liquid separator 1 is connected to the refrigerant inlet of condenser 3 through a first branch 8, and the refrigerant outlet of condenser 3 is connected to the delivery pipeline 9. Finally, the liquid phase separated by gas-liquid separator 1 and the subcooled refrigerant output from condenser 3 are delivered together to evaporator 5 by pump 2.

[0055] The two-phase liquid cooling system provided in this embodiment can control the delivery pressure of the liquid phase flowing out of the solid-liquid separator by setting a throttling device 6 on the first pipe directly connected to the liquid phase outlet of the gas-liquid separator 1. This allows the liquid phase in the solid-liquid separator to enter the upstream delivery pipeline 9 of the pump 2 at a relatively stable flow rate and pressure, avoiding the adverse effects on the pump 2 caused by the instability of the fluid in the delivery pipeline 9 due to the convergence of two branches, and effectively improving the service life of the pump 2.

[0056] Example 3

[0057] This embodiment provides a two-phase liquid cooling system, such as Figure 3 , Figure 4As shown, the system includes a pump 2, a gas-liquid separator 1, a condenser 3, a compressor 4, a throttling device 6, an evaporator 5, an inlet pipe 11, and an outlet pipe 12. The evaporator 5 includes two parallel cold plate evaporator groups. The two-phase refrigerant output from the two cold plate evaporator groups enters the gas-liquid separator 1 after passing through the outlet pipe 12. The liquid phase outlet of the gas-liquid separator 1 is connected to the delivery pipe 9 leading to the pump 2 through the first pipe 7. The throttling device 6 is installed on the first pipe 7. The gas phase outlet of the gas-liquid separator 1 is divided into a first branch 8 and a second branch 10. The first branch 8 enters the condenser 3, and after being condensed by the condenser 3, it is connected to the delivery pipe 9. The second branch 10 is compressed by the compressor 4 and then mixed with the subcooled refrigerant output from the pump 2 in the inlet pipe 11 to reduce the temperature of the two-phase refrigerant entering the cold plate evaporator. Then, it enters the two parallel cold plate evaporators for heat absorption. In this embodiment, the inlet pipe 11 can be provided with two parallel first connection ports, and each first connection port is further provided with multiple quick connectors 14 in parallel to connect to the cold plate evaporator array. In this embodiment, each cold plate evaporator array includes two cold plates connected in series (first cold plate 51 and second cold plate 52), and three cold plate evaporator arrays are connected in parallel to form a cold plate evaporator group. By setting the inlet pipe 11, the temperature of the two-phase refrigerant entering different cold plate evaporator groups is made consistent, ensuring that the subcooling of the two-phase refrigerant entering each cold plate evaporator group is reduced to a suitable range, avoiding problems such as uneven surface temperature of the cold plate and unstable flow within the cold plate caused by the presence of a single-phase region in the cold plate evaporator. At the same time, by separating the liquid in the two-phase refrigerant before entering the condenser 3, the problem of poor two-phase heat exchange in the condenser 3 is solved.

[0058] Preferably, to achieve uniform mixing of the fluid, such as Figure 7 As shown, the inlet pipe 11 may include an inlet cavity 111 and connecting branches 112. The outlet of pump 2 and the second end of compressor 4 are connected in parallel to the first end of inlet cavity 111. There are two connecting branches 112 corresponding to the cold plate evaporator group 5. The first end of connecting branch 112 is connected to the second end of inlet cavity 111, and the second end of connecting branch 112 is provided with a first connection port. By setting up inlet cavity 111 and using the same-end connection method, the two fluids entering can be quickly and evenly mixed.

[0059] In some preferred embodiments, the outlet flow rate of compressor 4 can be controlled by adjusting the speed or volume of compressor 4 to ensure that the outlet flow rate of pump 2 is within a predetermined ratio range. Generally, the ratio of the outlet flow rate of compressor 4 to the outlet flow rate of pump 2 is (1-12):1, measured by volumetric flow rate. Specifically, when R134a or R515B is used as the refrigerant, the ratio of the outlet flow rate of compressor 4 to the outlet flow rate of pump 2 is preferably (1-5):1. When R1233zd(E) is used as the refrigerant, the ratio of the outlet flow rate of compressor 4 to the outlet flow rate of pump 2 is preferably (4-12):1.

[0060] In some preferred embodiments, based on the above embodiments, the compressor 4 and pump 2 can be housed in the same housing and driven coaxially; or they can be housed separately as two parts of the same housing (fluorine pump part and compression part) and driven by different shafts. When housed in the same housing, such as... Figure 8 As shown, the housing 205 is provided with a first inlet, a second inlet, and an outlet 213; the compressor's suction port 211 is connected to the first inlet, and the first inlet is connected to the gas phase outlet of the gas-liquid separator 1; the refrigerant inlet (liquid inlet 207) of the pump 2 is connected to the second inlet, and the second inlet is connected to the refrigerant outlet of the condenser 3; the compressor 4's discharge port 208 (refrigerant outlet) and the pump 2's liquid outlet 210 (refrigerant outlet) are connected to the outlet 213, and the outlet 213 is connected to the refrigerant inlet of the evaporator 5. The compression section has a suction port 211 connected to the first inlet on the outside of the housing (i.e., the suction port 211 of the compressor), and the refrigerant pump section has a liquid inlet 207 connected to the second inlet on the outside of the housing 205 (which can be connected to the delivery pipeline 9, or connected to the liquid phase outlet of the gas-liquid separator 1 and the refrigerant outlet of the condenser 3). The outlets (refrigerant outlets) of the compression section and the refrigerant pump section are connected (to achieve mixing of the two fluids) and connected to the outlet on the outside of the housing 205 (for connecting the evaporator 5). The pump working chamber 201 and the compressor working chamber 202 are located on both sides of the motor 203, respectively. The oil sump 212 of the compressor can be set in the lower part of the housing 205. The motor 203 connects the pump 2 and the compressor 4 through the crankshaft 204. When driven coaxially, the outlet flow rate of the compressor 4 and the outlet flow rate of the pump 2 can be controlled by the suction volume of the compressor 4, the liquid inlet volume of the pump 2 and the flow control device. When driven non-coaxially, the outlet flow rate of the compressor 4 and the outlet flow rate of the pump 2 can be controlled by the suction volume of the compressor 4, the liquid inlet volume of the pump 2 and the flow control device. Alternatively, the outlet flow rate of the compressor 4 and the outlet flow rate of the pump 2 can be controlled by controlling the speed of the compressor 4, the flow control device and the speed of the pump 2.

[0061] Example 4

[0062] Unlike Example 2, as Figure 5 , Figure 6 As shown, in this embodiment, a subcooler 13 is installed on the upstream delivery pipeline of pump 2. The liquid phase outlet of gas-liquid separator 1 is connected to the upstream of subcooler 13 to supplement the subcooling of refrigerant liquid and avoid the adverse effects of insufficient subcooling on pump 2.

[0063] Some embodiments of this utility model also disclose a cooling device, which includes the two-phase liquid cooling system disclosed in the foregoing embodiments, and can be used for server cooling, etc.

[0064] In summary, the two-phase liquid cooling system and cooling equipment disclosed in this utility model embodiment not only solves the problem of excessively high refrigerant liquid cooling upon entering the cold plate evaporator, avoiding issues such as uneven surface temperature and unstable flow within the cold plate caused by the presence of a single-phase region in the cold plate evaporator, but also solves the problem of poor two-phase heat transfer in the condenser by separating the liquid from the two-phase refrigerant before it enters the condenser, thus improving the heat transfer coefficient within the condenser. Furthermore, the throttling device ensures better fluid flow stability in the delivery pipeline entering the pump, preventing adverse effects of unstable fluid flow on the pump and extending its service life.

[0065] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous technical features can be freely combined and superimposed.

[0066] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A two-phase liquid cooling system, characterized in that, include: Gas-liquid separator (1); Condenser (3): The gas phase outlet of the gas-liquid separator (1) is connected to the refrigerant inlet of the condenser (3); Pump (2): The refrigerant outlet of the condenser (3) is connected to the pump (2); the liquid phase outlet of the gas-liquid separator (1) is connected to the refrigerant inlet of the pump (2); Evaporator (5): The refrigerant outlet of the pump (2) is connected to the refrigerant inlet of the evaporator (5), and the refrigerant outlet of the evaporator (5) is connected to the inlet of the gas-liquid separator (1).

2. The two-phase liquid cooling system according to claim 1, characterized in that, It also includes a compressor (4), and the gas phase outlet of the gas-liquid separator (1) is also connected to the refrigerant inlet of the evaporator (5) through the compressor (4).

3. The two-phase liquid cooling system according to claim 1, characterized in that, It also includes a subcooler (13) disposed between the condenser (3) and the pump (2).

4. The two-phase liquid cooling system according to claim 3, characterized in that, The liquid phase outlet of the gas-liquid separator (1) is connected to the upstream of the subcooler (13).

5. The two-phase liquid cooling system according to claim 2, characterized in that, It also includes a housing, in which the compressor (4) and the pump (2) are installed, and the housing is provided with a first inlet, a second inlet and an outlet; The suction port of the compressor (4) is connected to the first inlet, and the gas phase outlet of the gas-liquid separator (1) is connected through the first inlet; The refrigerant inlet of the pump (2) is connected to the second inlet, and the refrigerant outlet of the condenser (3) is connected through the second inlet; The refrigerant outlet of the compressor (4) and the refrigerant outlet of the pump (2) are connected to the discharge port, and the discharge port is connected to the refrigerant inlet of the evaporator (5).

6. The two-phase liquid cooling system according to claim 5, characterized in that, The compressor (4) and the pump (2) are driven coaxially or non-coaxially.

7. The two-phase liquid cooling system according to claim 5, characterized in that, The refrigerant outlet of the compressor (4) and the refrigerant outlet of the pump (2) are connected to the discharge outlet via a connecting pipe.

8. The two-phase liquid cooling system according to claim 2, characterized in that, The compressor (4) and the pump (2) are housed in different housings and connected by a manifold, which has an opening that connects to the refrigerant inlet of the evaporator (5).

9. The two-phase liquid cooling system according to claim 1, characterized in that, The evaporator (5) includes a cold plate evaporator group, which is one or at least two.

10. The two-phase liquid cooling system according to claim 9, characterized in that, When there are at least two cold plate evaporator groups, the at least two cold plate evaporator groups are connected in parallel.

11. The two-phase liquid cooling system according to claim 9, characterized in that, When the two-phase liquid cooling system further includes a compressor (4), and the gas phase outlet of the gas-liquid separator (1) is also connected to the refrigerant inlet of the evaporator (5) through the compressor (4), the two-phase liquid cooling system further includes an inlet pipe (11) and an outlet pipe (12). The refrigerant outlet of the pump (2) and the refrigerant outlet of the compressor (4) are respectively connected to the inlet pipe (11) through pipes. The inlet pipe (11) is provided with one or at least two first connection ports, and the inlet of the cold plate evaporator group is connected to the first connection port one by one. The outlet pipe (12) is provided with a second connection port, and the outlets of at least two of the cold plate evaporator groups are connected to the second connection port in a one-to-one correspondence. The other end of the outlet pipe (12) is connected to the gas-liquid separator (1).

12. The two-phase liquid cooling system according to claim 11, characterized in that, The inlet pipe (11) includes: The outlet of the pump (2) and the refrigerant outlet of the compressor (4) are connected in parallel to the first end of the inlet cavity (111); A connecting branch (112) is provided, which may be one or at least two, wherein the first end of the connecting branch (112) is connected to the second end of the inlet cavity (111), and the second end of the connecting branch (112) is provided with the first connecting port.

13. The two-phase liquid cooling system according to claim 2, characterized in that, The ratio of the exhaust pressure to the intake pressure of the compressor (4) is 1.05-1.

5.

14. The two-phase liquid cooling system according to claim 2, characterized in that, The ratio of the refrigerant outlet flow rate of the compressor (4) to the refrigerant outlet flow rate of the pump (2) is (1-12):1, measured by volume flow rate meter.

15. The two-phase liquid cooling system according to claim 14, characterized in that, When R134a or R515B is used as the refrigerant, the ratio of the refrigerant outlet flow rate of the compressor (4) to the refrigerant outlet flow rate of the pump (2) is (1-5):1; When R1233zd(E) is used as the refrigerant, the ratio of the refrigerant outlet flow rate of the compressor (4) to the refrigerant outlet flow rate of the pump (2) is (4-12):

1.

16. The two-phase liquid cooling system according to claim 1, characterized in that, A throttling device (6) is provided downstream of the liquid phase outlet of the gas-liquid separator.

17. A cooling device, characterized in that, Includes the two-phase liquid cooling system as described in any one of claims 1-16.

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