Two-phase flow liquid cooling system

Abstract

This application provides a two-phase flow liquid cooling system, which includes a secondary side and at least two two-phase flow liquid cooling devices. Each two-phase flow liquid cooling device includes at least one two-phase flow cooling plate. The two-phase flow cooling plate is used to house a heat source. The secondary side includes a liquid storage tank, a gas-liquid separation buffer tank, and a heat exchanger assembly. The outlet of the liquid storage tank is connected to the inlet of the two-phase flow cooling plate of the at least two two-phase flow liquid cooling devices, the outlet of the two-phase flow cooling plate of the at least two two-phase flow liquid cooling devices is connected to the inlet of the gas-liquid separation buffer tank, the outlet of the gas-liquid separation buffer tank is connected to the inlet of the heat exchanger assembly, and the outlet of the heat exchanger assembly is connected to the inlet of the liquid storage tank. This effectively alleviates the liquid inlet obstruction at the inlet of the two-phase flow cooling plate caused by the high vaporization degree of the cooling working fluid, avoids local heat accumulation, and ensures high operational reliability.

Description

Technical Field

[0001] This application relates to the field of liquid cooling, and more particularly to a two-phase flow liquid cooling system. Background Technology

[0002] With the rapid development of science and technology, data centers are widely deployed as the infrastructure for cloud computing, artificial intelligence, and big data processing. To cope with the large amount of heat generated by data center computing, two-phase flow liquid cooling systems are commonly used for heat dissipation. However, in two-phase flow liquid cooling systems, when the temperature of a local heat source is too high, the circulation of the cooling medium in the corresponding heat dissipation channel may be obstructed, causing heat accumulation and poor operational reliability. Summary of the Invention

[0003] This application provides a two-phase flow liquid cooling system with high operational reliability.

[0004] This application provides a two-phase flow liquid cooling system, including a secondary side and at least two two-phase flow liquid cooling devices; the two-phase flow liquid cooling devices include at least one two-phase flow cooling plate; the two-phase flow cooling plate is used to house a heat source; the secondary side includes a liquid storage tank, a gas-liquid separation buffer tank, and a heat exchanger assembly; The outlet of the liquid storage tank is connected to the inlet of the two-phase flow cooling plate of the at least two two-phase flow liquid cooling devices, the outlet of the two-phase flow cooling plate of the at least two two-phase flow liquid cooling devices is connected to the inlet of the gas-liquid separation buffer tank, the outlet of the gas-liquid separation buffer tank is connected to the inlet of the heat exchanger group, and the outlet of the heat exchanger group is connected to the inlet of the liquid storage tank.

[0005] Furthermore, the heat exchanger assembly includes a first heat exchanger and a second heat exchanger; the gas-liquid separation buffer tank has at least two outlets, and the outlets of the at least two gas-liquid separation buffer tanks include a gas phase outlet and a liquid phase outlet; the gas phase outlet of the gas-liquid separation buffer tank is connected to the inlet of the first heat exchanger, and the liquid phase outlet of the gas-liquid separation buffer tank is connected to the inlet of the second heat exchanger; the outlets of the first heat exchanger and the second heat exchanger are respectively connected to the inlet of the liquid storage tank.

[0006] Furthermore, the volume of the first heat exchanger is larger than the volume of the second heat exchanger; and / or, The liquid storage tank has at least two inlets, including a top inlet and a bottom inlet; the outlet of the first heat exchanger is connected to the top inlet of the liquid storage tank, and the outlet of the second heat exchanger is connected to the bottom inlet of the liquid storage tank.

[0007] Furthermore, the liquid phase outlet of the gas-liquid separation buffer tank is located at the bottom of the gas-liquid separation buffer tank; the number of inlets of the liquid storage tank is at least one, and at least one inlet of the liquid storage tank includes a bottom inlet; The liquid phase outlet located at the bottom of the gas-liquid separation buffer tank is connected to the inlet of the second heat exchanger, and the outlet of the second heat exchanger is connected to the bottom inlet of the storage tank.

[0008] Furthermore, the secondary side also includes a pressure control valve, a pressure sensor, and a controller; the pressure sensor is installed inside the gas-liquid separation buffer tank; a pressure relief port is provided at the top of the gas-liquid separation buffer tank, a connection port is provided at the top of the liquid storage tank, and the pressure control valve is installed on the pipeline between the pressure relief port of the gas-liquid separation buffer tank and the connection port of the liquid storage tank; The pressure control valve and the pressure sensor are electrically connected to the controller; the controller is used to switch the pressure control valve to the open state when the pressure detected by the pressure sensor is greater than the preset pressure, so as to connect the pressure relief port of the gas-liquid separation buffer tank and the connection port of the liquid storage tank.

[0009] Furthermore, the secondary side also includes a replenishment tank, a replenishment valve, a level sensor, and a controller; the level sensor is disposed inside the storage tank; the storage tank is provided with a replenishment port connected to the replenishment tank; the replenishment valve is disposed on the pipeline between the replenishment port of the storage tank and the replenishment tank; The replenishment valve and the liquid level sensor are electrically connected to the controller; the controller is used to switch the replenishment valve to the open state when the liquid level detected by the liquid level sensor is lower than the preset liquid level, so as to connect the replenishment port of the storage tank and the replenishment tank.

[0010] Furthermore, the secondary side also includes a first temperature sensor, a second temperature sensor, and a controller; the heat exchanger group includes at least two first heat exchangers and at least two second heat exchangers, the at least two first heat exchangers including a first main heat exchanger and a first standby heat exchanger connected in parallel; the at least two second heat exchangers include a second main heat exchanger and a second standby heat exchanger connected in parallel. The first temperature sensor is disposed at the outlet of the first main heat exchanger, and the second temperature sensor is disposed at the outlet of the second main heat exchanger; the first temperature sensor and the second temperature sensor are electrically connected to the controller; the controller is used to control the gas phase outlet to switch from being connected to the first main heat exchanger to being connected to the first standby heat exchanger when the temperature detected by the first temperature sensor is higher than a first temperature threshold; and to control the liquid phase outlet to switch from being connected to the second main heat exchanger to being connected to the second standby heat exchanger when the temperature detected by the second temperature sensor is higher than a second temperature threshold.

[0011] Furthermore, the two-phase flow cooling device includes at least two two-phase flow cooling plates; the at least two two-phase flow cooling plates are respectively used to set different heat sources.

[0012] Furthermore, the flow resistance value of at least two of the two-phase flow cooling plates used for the heat source with high heat generation is less than the flow resistance value of the two-phase flow cooling plate used for the heat source with low heat generation.

[0013] Furthermore, the secondary side also includes a liquid pump and a controller; the liquid pump is connected between the outlet of the liquid storage tank and the inlet of the two-phase flow cooling plate of at least two of the two-phase flow liquid cooling devices; The liquid pump is electrically connected to the controller; the controller is used to determine the pulse signal corresponding to each of the heat sources according to their respective temperatures, and to control the speed of the liquid pump based on the pulse signal with the largest duty cycle.

[0014] The two-phase flow liquid cooling system of this application includes a secondary side and at least two two-phase flow liquid cooling devices. The secondary side includes a liquid storage tank, a gas-liquid separation buffer tank, and a heat exchanger group. The outlet of the two-phase flow cooling plate of the at least two two-phase flow liquid cooling devices is connected to the inlet of the gas-liquid separation buffer tank, and the outlet of the gas-liquid separation buffer tank is connected to the inlet of the heat exchanger group. The gas-liquid separation buffer tank can prevent the pressure at the outlet of the two-phase flow cooling plate in the at least two two-phase flow liquid cooling devices from rising excessively, thereby effectively alleviating the liquid inlet obstruction at the inlet of the two-phase flow cooling plate caused by the high degree of vaporization of the cooling working fluid, avoiding local heat accumulation, and ensuring high operational reliability.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0017] Figure 1 The diagram shown is a schematic diagram of a two-phase flow liquid cooling system according to an embodiment of this application; Figure 2 The diagram shown is a schematic diagram of a two-phase flow liquid cooling system according to another embodiment of this application. Detailed Implementation

[0018] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0019] To better understand the technical solution of this application, the two-phase flow liquid cooling system of this application will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features in the following embodiments and implementation methods can be combined with each other.

[0020] Figure 1 The diagram shown is a schematic representation of a two-phase flow liquid cooling system 100 according to an embodiment of this application. See also... Figure 1 As shown in the figure, this application provides a two-phase flow liquid cooling system 100, which includes a secondary side 101 and at least two two-phase flow liquid cooling devices 102. In the embodiment shown in the figure, the two-phase flow liquid cooling system 100 includes two two-phase flow liquid cooling devices 102.

[0021] The secondary side 101 includes a liquid storage tank 11, a gas-liquid separation buffer tank 13, and a heat exchanger group 14. The heat exchanger group 14 may include one or more heat exchangers, which are equivalent to condensers and are used to condense the cooling working fluid into a liquid state.

[0022] The two-phase flow cooling device 102 includes at least one two-phase flow cooling plate 12. In the embodiment shown in the figure, the two-phase flow cooling device 102 includes one two-phase flow cooling plate 12. The two-phase flow cooling plate 12 is used to house a heat source 15. One two-phase flow cooling plate 12 can be used to house one heat source 15. The heat source 15 can be attached to the two-phase flow cooling plate 12. The heat source 15 may include electronic components in a data center rack, and the heat source 15 may include at least one electronic component. The electronic component may be a central processing unit, image processor, integrated circuit, power module, etc., and this application is not limited thereto.

[0023] The outlet of the liquid storage tank 11 is connected to the inlet of the two-phase flow cooling plate 12 of at least two two-phase flow liquid cooling devices 102. The outlet of the two-phase flow cooling plate 12 of the at least two two-phase flow liquid cooling devices 102 is connected to the inlet of the gas-liquid separation buffer tank 13. The outlet of the gas-liquid separation buffer tank 13 is connected to the inlet of the heat exchanger group 14. The outlet of the heat exchanger group 14 is connected to the inlet of the liquid storage tank 11, forming a circulation loop. The cooling medium can circulate in this circulation loop to dissipate heat from the heat source 15 disposed on the two-phase flow cooling plate 12. The cooling medium can be a fluorinated liquid.

[0024] The cooling medium flows out from the outlet of the storage tank 11 and enters the inlet of the two-phase flow cooling plate 12 of at least two two-phase flow liquid cooling devices 102. The two-phase flow cooling plate 12 is used to house the heat source 15. The heat generated by the heat source 15 during operation causes part of the cooling medium flowing through the two-phase flow cooling plate 12 to vaporize. The greater the heat output of the heat source 15, the higher the degree of vaporization of the cooling medium. The vaporized two-phase cooling medium flows sequentially through the gas-liquid separation buffer tank 13 and the heat exchanger group 14. After condensing and liquefying in the heat exchanger group 14, it flows back into the storage tank 11.

[0025] The two-phase flow liquid cooling system 100 of this application includes a secondary side 101 and at least two two-phase flow liquid cooling devices 102. The secondary side 101 includes a liquid storage tank 11, a gas-liquid separation buffer tank 13, and a heat exchanger group 14. The outlet of the two-phase flow cooling plate 12 of the at least two two-phase flow liquid cooling devices 102 is connected to the inlet of the gas-liquid separation buffer tank 13, and the outlet of the gas-liquid separation buffer tank 13 is connected to the inlet of the heat exchanger group 14. The gas-liquid separation buffer tank 13 can prevent the pressure at the outlet of the two-phase flow cooling plate 12 in the at least two two-phase flow liquid cooling devices 102 from rising excessively, thereby effectively alleviating the liquid inlet obstruction at the inlet of the two-phase flow cooling plate 12 caused by the high degree of vaporization of the cooling working fluid, avoiding local heat accumulation, and ensuring high operational reliability.

[0026] In one embodiment, when the heat exchanger group 14 includes multiple heat exchangers, the heat exchanger group 14 includes a first heat exchanger 16 and a second heat exchanger 17. The gas-liquid separation buffer tank 13 can be used to achieve gas-liquid separation of the cooling working fluid flowing into the gas-liquid separation buffer tank 13.

[0027] The gas-liquid separation buffer tank 13 has at least two outlets, including a gas phase outlet 18 and a liquid phase outlet 19. The inlet of the gas-liquid separation buffer tank 13 is located between the gas phase outlet 18 and the liquid phase outlet 19. The gas phase outlet 18 is located at the top of the gas-liquid separation buffer tank 13, and the liquid phase outlet 19 is located at the bottom of the gas-liquid separation buffer tank 13.

[0028] The gas phase outlet 18 of the gas-liquid separation buffer tank 13 is connected to the inlet of the first heat exchanger 16, and the liquid phase outlet 19 of the gas-liquid separation buffer tank 13 is connected to the inlet of the second heat exchanger 17. The outlets of the first heat exchanger 16 and the second heat exchanger 17 are respectively connected to the inlet of the liquid storage tank 11. The first heat exchanger 16 is used to condense the cooling medium discharged from the gas phase outlet 18 of the gas-liquid separation buffer tank 13, and the second heat exchanger 17 is used to subcool the cooling medium discharged from the liquid phase outlet 19 of the gas-liquid separation buffer tank 13. Condensation and subcooling are respectively completed by the first heat exchanger 16 and the second heat exchanger 17, thereby improving the heat exchange efficiency.

[0029] In one embodiment, the volume of the first heat exchanger 16 is larger than the volume of the second heat exchanger 17, wherein the heat exchange capacity of the first heat exchanger 16 can be higher than that of the second heat exchanger 17. This allows for a smaller volume of the second heat exchanger 17, used for condensing the cooling medium discharged from the liquid phase outlet 19 of the gas-liquid separation buffer tank 13, thus reducing costs while ensuring effective heat exchange.

[0030] In one embodiment, the storage tank 11 has at least two inlets, including a top inlet 20 and a bottom inlet 21. The top inlet 20 is located at the top of the storage tank 11, and the bottom inlet 21 is located at the bottom of the storage tank 11. The outlet of the first heat exchanger 16 is connected to the top inlet 20 of the storage tank 11, and the outlet of the second heat exchanger 17 is connected to the bottom inlet 21 of the storage tank 11. The top inlet 20 of the storage tank 11 is used for reflux of the condensed liquid cooling medium, and the bottom inlet 21 of the storage tank 11 is used for reflux of the subcooled liquid cooling medium. This effectively prevents fluctuations in the liquid level of the storage tank 11, which is beneficial for accurate detection by the level sensor and reliable operation of the liquid pump.

[0031] In one embodiment, the number of inlets of the liquid storage tank 11 is at least one, and at least one inlet of the liquid storage tank 11 includes a bottom inlet 21. A liquid phase outlet 19 disposed at the bottom of the gas-liquid separation buffer tank 13 is connected to the inlet of the second heat exchanger 17, and the outlet of the second heat exchanger 17 is connected to the bottom inlet 21 of the liquid storage tank 11. This allows for communication between the liquid cooling working fluid of the gas-liquid separation buffer tank 13 and the liquid storage tank 11, avoiding insufficient liquid supply.

[0032] In one embodiment, the secondary side 101 further includes a pressure control valve 22, a pressure sensor 23, and a controller (not shown in the figure). The pressure sensor 23 is disposed inside the gas-liquid separation buffer tank 13 and is used to detect the pressure inside the gas-liquid separation buffer tank 13.

[0033] The gas-liquid separation buffer tank 13 is provided with a pressure relief port 24 at its top, and the liquid storage tank 11 is provided with a connection port 25 at its top. The pressure relief port 24 is connected to the connection port 25. The pressure relief port 24 of the gas-liquid separation buffer tank 13 and the connection port 25 of the liquid storage tank 11 are connected by a pipeline. A pressure control valve 22 is installed on the pipeline between the pressure relief port 24 of the gas-liquid separation buffer tank 13 and the connection port 25 of the liquid storage tank 11.

[0034] When the pressure control valve 22 is closed, the pressure relief port 24 of the gas-liquid separation buffer tank 13 is isolated from the connection port 25 of the liquid storage tank 11. When the pressure control valve 22 is open, the pressure relief port 24 of the gas-liquid separation buffer tank 13 is connected to the connection port 25 of the liquid storage tank 11.

[0035] The pressure control valve 22 and pressure sensor 23 are electrically connected to the controller. The controller switches the pressure control valve 22 to the open state when the pressure detected by the pressure sensor 23 exceeds a preset pressure, thereby connecting the pressure relief port 24 of the gas-liquid separation buffer tank 13 to the connection port 25 of the storage tank 11. The pressure control valve 22 can be switched to the open state when the pressure inside the gas-liquid separation buffer tank 13 is high. Since the liquid phase outlet 19 at the bottom of the gas-liquid separation buffer tank 13 is connected to the bottom inlet 21 of the storage tank 11 via the second heat exchanger 17, a communicating vessel can be formed when the pressure control valve 22 is in the open state, enabling pressure balance between the gas-liquid separation buffer tank 13 and the storage tank 11, thus improving reliability.

[0036] In one embodiment, the secondary side 101 further includes a replenishment tank 26, a replenishment valve 27, and a level sensor 28. The storage tank 11 is provided with a replenishment port 29 connected to the replenishment tank 26. The level sensor 28 is disposed inside the storage tank 11 and is used to detect the liquid level of the cooling medium inside the storage tank 11. The replenishment port 29 of the storage tank 11 is connected to the replenishment tank 26 via a pipeline. The replenishment valve 27 is disposed on the pipeline between the replenishment port 29 of the storage tank 11 and the replenishment tank 26.

[0037] When the replenishment valve 27 is closed, the replenishment port 29 of the storage tank 11 is isolated from the replenishment tank 26. When the replenishment valve 27 is open, the replenishment port 29 of the storage tank 11 is connected to the replenishment tank 26. The replenishment valve 27 and the level sensor 28 are electrically connected to the controller. The controller is used to switch the replenishment valve 27 to the open state when the level detected by the level sensor 28 is lower than the preset level, so as to connect the replenishment port 29 of the storage tank 11 and the replenishment tank 26. This allows the replenishment valve 27 to be switched to the open state when the level is low, so as to replenish the cooling medium through the replenishment tank 26, effectively avoiding insufficient liquid supply and reduced heat dissipation capacity caused by low liquid level.

[0038] In one embodiment, the two-phase flow cooling device 102 includes at least two two-phase flow cooling plates 12, each used to house a different heat source 15. The different heat sources 15 can be of the same or different types. Thus, at least two heat sources 15 can be cooled by the at least two two-phase flow cooling plates 12, thereby enabling simultaneous cooling of multiple heat sources 15 and achieving high operating efficiency.

[0039] In one embodiment, at least two two-phase flow cooling plates 12 include a first two-phase flow cooling plate and a second two-phase flow cooling plate, and at least two heat sources 15 include a first heat source and a second heat source. The first two-phase flow cooling plate is used to house the first heat source to achieve heat dissipation of the first heat source, and the second two-phase flow cooling plate is used to house the second heat source to achieve heat dissipation of the second heat source. The type of the first heat source may be the same as or different from the type of the second heat source.

[0040] In one embodiment, the flow resistance of at least two two-phase flow cooling plates 12 used for heat sources 15 with high heat generation is less than the flow resistance of two-phase flow cooling plates 12 used for heat sources 15 with low heat generation. In this way, the heat generation of different heat sources 15 can correspond to different flow resistance values ​​of the two-phase flow cooling plates 12, thereby adapting to the heat generation of the heat source 15 and achieving effective cooling of the heat source 15.

[0041] In one embodiment, the secondary side 101 further includes a liquid pump 34. The liquid pump 34 is connected between the outlet of the storage tank 11 and the inlet of the two-phase flow cooling plates 12 of at least two two-phase flow liquid cooling devices 102. The liquid pump 34 provides power for the circulating flow of the cooling medium within the loop. The controller can directly obtain the temperature of each heat source 15.

[0042] The liquid pump 34 is electrically connected to the controller. The controller determines the pulse signal corresponding to each temperature of each heat source 15, and controls the rotational speed of the liquid pump 34 based on the pulse signal with the largest duty cycle. The pulse signal can be a PWM (Pulse-width modulation) signal. By controlling the rotational speed of the liquid pump 34, the heat dissipation capacity of the two-phase flow liquid cooling system 100 can be regulated. By controlling the rotational speed of the liquid pump 34 based on the pulse signal with the largest duty cycle, the heat dissipation effect of each heat source 15 can be ensured, and the temperature of each heat source 15 can be stabilized within a suitable operating temperature range.

[0043] Figure 2 The diagram shown is a schematic representation of a two-phase flow liquid cooling system 100 according to another embodiment of this application. See also... Figure 2 As shown, in one embodiment, the secondary side 101 further includes a first temperature sensor 35 and a second temperature sensor 36. (As illustrated...) Figure 1 The heat exchanger assembly 14 shown includes at least one first heat exchanger 16 and at least one second heat exchanger 17. For example... Figure 2 The heat exchanger assembly 14 shown includes at least two first heat exchangers 16 and at least two second heat exchangers 17.

[0044] At least two first heat exchangers 16 include a first main heat exchanger 37 and a first standby heat exchanger 38 connected in parallel. At least two second heat exchangers 17 include a second main heat exchanger 39 and a second standby heat exchanger 40 connected in parallel. A first temperature sensor 35 is disposed at the outlet of the first main heat exchanger 37 for detecting the outlet temperature of the first main heat exchanger 37. A second temperature sensor 36 is disposed at the outlet of the second main heat exchanger 39 for detecting the outlet temperature of the second main heat exchanger 39.

[0045] The first temperature sensor 35 and the second temperature sensor 36 are electrically connected to the controller. The controller is used to switch the gas phase outlet 18 from being connected to the first main heat exchanger 37 to being connected to the first standby heat exchanger 38 when the temperature detected by the first temperature sensor 35 is higher than a first temperature threshold.

[0046] A first control valve 41 is installed on the pipeline connecting the gas outlet 18 to the inlet of the first main heat exchanger 37, and a second control valve 42 is installed on the pipeline connecting the gas outlet 18 to the inlet of the first standby heat exchanger 38. The first control valve 41 and the second control valve 42 are electrically connected to a controller. The controller is used to control the first control valve 41 to switch to a closed state and the second control valve 42 to an open state when the temperature detected by the first temperature sensor 35 is higher than a first temperature threshold, thereby switching the gas outlet 18 from being connected to the first main heat exchanger 37 to being connected to the first standby heat exchanger 38.

[0047] When the temperature detected by the second temperature sensor 36 is higher than the second temperature threshold, the liquid phase outlet 19 is switched from being connected to the second main heat exchanger 39 to being connected to the second standby heat exchanger 40.

[0048] A third control valve 43 is installed on the pipeline connecting the liquid outlet 19 to the inlet of the second main heat exchanger 39, and a fourth control valve 44 is installed on the pipeline connecting the liquid outlet 19 to the inlet of the second standby heat exchanger 40. The third control valve 43 and the fourth control valve 44 are electrically connected to a controller. The controller is used to control the third control valve 43 to switch to the closed state and the fourth control valve 44 to the open state when the temperature detected by the second temperature sensor 36 is higher than a second temperature threshold, thereby switching the liquid outlet 19 from being connected to the second main heat exchanger 39 to being connected to the second standby heat exchanger 40.

[0049] In this way, when the outlet liquid temperature of the first main heat exchanger 37 and the outlet liquid temperature of the second main heat exchanger 39 are high, the system can switch to the corresponding first standby heat exchanger 38 and second standby heat exchanger 40, thereby ensuring the heat dissipation capacity of the two-phase flow liquid cooling system 100 and improving its reliability.

[0050] In one embodiment, the secondary side 101 further includes a main temperature sensor 45, which is disposed inside the storage tank 11. The main temperature sensor 45 is used to detect the temperature of the cooling medium inside the storage tank 11. The main temperature sensor 45 is electrically connected to a controller, which is used to acquire the temperatures detected by the first temperature sensor 35 and the second temperature sensor 36 when the temperature detected by the main temperature sensor 45 is higher than a third temperature threshold. This allows for comparison of the temperatures detected by the first temperature sensor 35 and the second temperature sensor 36 when the temperature of the cooling medium inside the storage tank 11 is already high, thereby improving operating efficiency.

[0051] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A two-phase flow liquid cooling system, characterized in that, It includes a secondary side and at least two two-phase flow liquid cooling devices; the two-phase flow liquid cooling devices include at least one two-phase flow cooling plate; the two-phase flow cooling plate is used to house a heat source; the secondary side includes a liquid storage tank, a gas-liquid separation buffer tank, and a heat exchanger assembly. The outlet of the liquid storage tank is connected to the inlet of the two-phase flow cooling plate of the at least two two-phase flow liquid cooling devices, the outlet of the two-phase flow cooling plate of the at least two two-phase flow liquid cooling devices is connected to the inlet of the gas-liquid separation buffer tank, the outlet of the gas-liquid separation buffer tank is connected to the inlet of the heat exchanger group, and the outlet of the heat exchanger group is connected to the inlet of the liquid storage tank.

2. The two-phase flow liquid cooling system according to claim 1, characterized in that, The heat exchanger assembly includes a first heat exchanger and a second heat exchanger; the gas-liquid separation buffer tank has at least two outlets, and the outlets of the at least two gas-liquid separation buffer tanks include a gas phase outlet and a liquid phase outlet; the gas phase outlet of the gas-liquid separation buffer tank is connected to the inlet of the first heat exchanger, and the liquid phase outlet of the gas-liquid separation buffer tank is connected to the inlet of the second heat exchanger; the outlets of the first heat exchanger and the second heat exchanger are respectively connected to the inlet of the liquid storage tank.

3. The two-phase flow liquid cooling system according to claim 2, characterized in that, The volume of the first heat exchanger is larger than the volume of the second heat exchanger; and / or, The liquid storage tank has at least two inlets, including a top inlet and a bottom inlet; the outlet of the first heat exchanger is connected to the top inlet of the liquid storage tank, and the outlet of the second heat exchanger is connected to the bottom inlet of the liquid storage tank.

4. The two-phase flow liquid cooling system according to claim 2, characterized in that, The liquid phase outlet of the gas-liquid separation buffer tank is located at the bottom of the gas-liquid separation buffer tank; the number of inlets of the liquid storage tank is at least one, and at least one inlet of the liquid storage tank includes a bottom inlet; The liquid phase outlet located at the bottom of the gas-liquid separation buffer tank is connected to the inlet of the second heat exchanger, and the outlet of the second heat exchanger is connected to the bottom inlet of the storage tank.

5. The two-phase flow liquid cooling system according to claim 4, characterized in that, The secondary side also includes a pressure control valve, a pressure sensor, and a controller; the pressure sensor is installed inside the gas-liquid separation buffer tank; a pressure relief port is provided at the top of the gas-liquid separation buffer tank, a connection port is provided at the top of the liquid storage tank, and the pressure control valve is installed on the pipeline between the pressure relief port of the gas-liquid separation buffer tank and the connection port of the liquid storage tank; The pressure control valve and the pressure sensor are electrically connected to the controller; The controller is used to switch the pressure control valve to the open state when the pressure detected by the pressure sensor is greater than the preset pressure, so as to connect the pressure relief port of the gas-liquid separation buffer tank and the connection port of the liquid storage tank.

6. The two-phase flow liquid cooling system according to claim 4, characterized in that, The secondary side also includes a replenishment tank, a replenishment valve, a level sensor, and a controller; the level sensor is installed inside the storage tank; the storage tank is provided with a replenishment port connected to the replenishment tank; the replenishment valve is installed on the pipeline between the replenishment port of the storage tank and the replenishment tank; The replenishment valve and the liquid level sensor are electrically connected to the controller; the controller is used to switch the replenishment valve to the open state when the liquid level detected by the liquid level sensor is lower than the preset liquid level, so as to connect the replenishment port of the storage tank and the replenishment tank.

7. The two-phase flow liquid cooling system according to claim 2, characterized in that, The secondary side also includes a first temperature sensor, a second temperature sensor, and a controller; the heat exchanger group includes at least two first heat exchangers and at least two second heat exchangers, the at least two first heat exchangers including a first main heat exchanger and a first standby heat exchanger connected in parallel; the at least two second heat exchangers including a second main heat exchanger and a second standby heat exchanger connected in parallel. The first temperature sensor is located at the outlet of the first main heat exchanger, and the second temperature sensor is located at the outlet of the second main heat exchanger; the first temperature sensor and the second temperature sensor are electrically connected to the controller; The controller is configured to switch the gas phase outlet from being connected to the first main heat exchanger to being connected to the first standby heat exchanger when the temperature detected by the first temperature sensor is higher than the first temperature threshold; and to switch the liquid phase outlet from being connected to the second main heat exchanger to being connected to the second standby heat exchanger when the temperature detected by the second temperature sensor is higher than the second temperature threshold.

8. The two-phase flow liquid cooling system according to claim 1, characterized in that, The two-phase flow cooling device includes at least two two-phase flow cooling plates; the at least two two-phase flow cooling plates are used to set different heat sources.

9. The two-phase flow liquid cooling system according to claim 8, characterized in that, The flow resistance of at least two of the two-phase flow cooling plates used for a heat source with high heat generation is less than the flow resistance of the two-phase flow cooling plate used for a heat source with low heat generation.

10. The two-phase flow liquid cooling system according to claim 1, characterized in that, The secondary side also includes a liquid pump and a controller; the liquid pump is connected between the outlet of the liquid storage tank and the inlet of the two-phase flow cooling plate of at least two of the two-phase flow liquid cooling devices; The liquid pump is electrically connected to the controller; The controller is used to determine the pulse signal corresponding to each of the heat sources based on their respective temperatures, and to control the speed of the liquid pump based on the pulse signal with the largest duty cycle.

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