CN114051356B - Negative pressure liquid cooling system - Google Patents

Abstract

The invention relates to the technical field of chip cooling, in particular to a negative pressure liquid cooling system. The negative pressure liquid cooling system includes first liquid reserve tank, second liquid reserve tank, vacuum pump, heat exchanger and cold plate, and the negative pressure liquid cooling system has: the first air inlet is used for air inlet, the second air outlet is used for air outlet, the first liquid outlet is used for liquid outlet, and the second liquid inlet is used for liquid inlet; and the second air inlet is used for air inlet, the first air outlet is used for air outlet, the second liquid outlet is used for liquid outlet, and the first liquid inlet is used for liquid inlet; the negative pressure liquid cooling system is suitable for being circularly switched between a first state and a second state. The negative pressure liquid cooling system provided by the invention can realize the flowing circulation of the cooling liquid without a water pump, reduces parts such as the water pump, reduces the cost and also reduces the control difficulty of the negative pressure liquid cooling system.

Description

Negative pressure liquid cooling system

Technical field

The invention relates to the technical field of chip cooling, and in particular to a negative pressure liquid cooling system.

Background technique

In recent years, with the improvement of the integration of electronic components, the power of chips has become higher and higher, and the heat dissipation requirements of chips have become higher and higher. The traditional air-cooling heat dissipation method is difficult to solve the heat dissipation problem of high-power, high heat flow density chips.

Because liquid cooling can solve the heat dissipation problem of high-power, high-heat-flux-density chips, it is increasingly used in cooling high-power electronic equipment. The traditional liquid cooling system is a positive pressure liquid cooling system, that is, the liquid pressure in the pipeline is greater than the ambient pressure outside the pipeline. When the pipeline is perforated due to corrosion or other reasons, the liquid in the pipeline will leak from the perforation to the electronics. components, causing damage to electronic components.

In the negative pressure liquid cooling system, because the internal pressure of the liquid is lower than atmospheric pressure, there will be no problem of coolant leakage. An existing negative pressure liquid cooling system and its control method include a heat exchanger, a one-way valve, a cooling plate and a water tank connected in sequence. The outlet of the water tank is connected to the inlet of the heat exchanger, and the coolant acts on the liquid pump. It circulates between the heat exchanger, cooling plate and water tank. The water tank is also connected to a vacuum pump. The vacuum pump is used to adjust the pressure at the outlet of the cooling plate. This negative pressure liquid cooling system requires the vacuum pump and the water pump to work at the same time to maintain the normal operation of the system. The reliability requirements for the vacuum pump and the water pump are high, and the cost and control difficulty of the system are also high.

Contents of the invention

Therefore, the technical problem to be solved by the present invention is to overcome the shortcomings in the prior art that the vacuum pump and the water pump need to work at the same time to maintain the normal operation of the system, and the cost and control difficulty of the system are high, thereby providing a low cost and control difficulty Negative pressure liquid cooling system.

In order to solve the above problems, the present invention provides a negative pressure liquid cooling system, which includes a first liquid storage tank, a second liquid storage tank, a vacuum pump, a heat exchanger and a cold plate. The first liquid storage tank includes a first air inlet. , a first air outlet, a first liquid inlet and a first liquid outlet; the second liquid storage tank includes a second air inlet, a second air outlet, a second liquid inlet and a second liquid outlet; the vacuum pump includes an inlet The air inlet and the exhaust port are connected, the air inlet is connected to the first air outlet and the second air outlet, and the exhaust port is connected to both the first air inlet and the second air inlet; the heat exchanger includes a liquid inlet and a liquid outlet, the liquid The inlet is connected to both the first liquid outlet and the second liquid outlet; the cold plate includes a liquid inlet and a liquid outlet, the liquid inlet is connected to the liquid outlet, and the liquid outlet is connected to the first liquid inlet and the second liquid inlet. are all connected; wherein, the negative pressure liquid cooling system has: a first state in which air is taken in through the first air inlet, air is discharged through the second air outlet, liquid is discharged through the first liquid outlet, and liquid is introduced into the second liquid inlet; and The air inlet is in the air port, the first air outlet is out air, the second liquid outlet is out liquid, and the first liquid inlet is in the second state; the negative pressure liquid cooling system is suitable for cyclic switching between the first state and the second state.

The negative pressure liquid cooling system provided by the present invention also includes an adjustment structure, which is provided on the upstream pipeline of the liquid inlet and is suitable for adjusting the hydraulic pressure at the liquid inlet to lower than atmospheric pressure.

In the negative pressure liquid cooling system provided by the invention, the adjustment structure includes a pressure gauge and an electromagnetic regulating valve; the pressure gauge is arranged on the connecting pipeline between the liquid outlet and the liquid inlet, and is suitable for measuring hydraulic pressure; the electromagnetic regulating valve is communicated with the pressure gauge. , suitable for adjusting the opening of the solenoid regulating valve according to the measurement results of the pressure gauge.

In the negative pressure liquid cooling system provided by the present invention, a bubble detection structure is provided on the downstream pipeline of the liquid discharge port. The negative pressure liquid cooling system is adapted to have a third state when the bubble detection structure detects bubbles. In the third state, the first The air outlet and the second air outlet both discharge air, and the first liquid inlet and the second liquid inlet both receive liquid.

The negative pressure liquid cooling system provided by the present invention also includes an electromagnetic exhaust valve and an exhaust pipe. One end of the exhaust pipe is connected to the exhaust port of the vacuum pump, and the other end is connected to the atmosphere; the electromagnetic exhaust valve is arranged on the exhaust pipe. , and is suitable for opening when the negative pressure liquid cooling system is in the third state.

The negative pressure liquid cooling system provided by the present invention also includes a first switching structure, a second switching structure, a third switching structure and a fourth switching structure. The first switching structure is arranged on the pipeline downstream of the liquid discharge port and is suitable for controlling the third switching structure. The opening and closing of the first liquid inlet and the second liquid inlet; the second switching structure is provided on the upstream pipeline of the liquid inlet, and is suitable for controlling the opening and closing of the first liquid outlet and the second liquid outlet; and the third switching structure is provided The pipeline downstream of the exhaust port is suitable for controlling the opening and closing of the first air inlet and the second air inlet; the fourth switching structure is provided on the pipeline upstream of the air inlet and is suitable for controlling the opening and closing of the first air outlet and the second air inlet. The opening and closing of the air outlet.

In the negative pressure liquid cooling system provided by the present invention, the first switching structure includes a first solenoid valve and a second solenoid valve. The first solenoid valve is provided on the connecting pipeline between the liquid discharge port and the first liquid inlet; the second solenoid valve is provided On the connecting pipeline between the drain port and the second liquid inlet.

In the negative pressure liquid cooling system provided by the present invention, the second switching structure includes a third solenoid valve and a fourth solenoid valve. The third solenoid valve is arranged on the connecting pipeline between the liquid inlet and the first liquid outlet; the fourth solenoid valve is arranged on On the connecting pipeline between the liquid inlet and the second liquid outlet.

In the negative pressure liquid cooling system provided by the present invention, the third switching structure includes a fifth solenoid valve and a sixth solenoid valve. The fifth solenoid valve is provided on the connecting pipeline between the exhaust port and the first air inlet; the sixth solenoid valve is provided On the connecting pipe between the exhaust port and the second air inlet.

In the negative pressure liquid cooling system provided by the present invention, the fourth switching structure includes a seventh solenoid valve and an eighth solenoid valve; the seventh solenoid valve is disposed on the connecting pipeline between the air inlet and the first air outlet; and the eighth solenoid valve is disposed on the inlet. On the connecting pipeline between the air port and the second air outlet.

The invention has the following advantages:

1. The negative pressure liquid cooling system provided by the present invention includes a first liquid storage tank, a second liquid storage tank, a vacuum pump, a heat exchanger and a cold plate. Under the action of the vacuum pump, the first liquid storage tank and the second liquid storage tank The tank alternately switches between low pressure and high pressure to provide power for the circulation of coolant in the negative pressure liquid cooling system. The flow circulation of the coolant can be realized without a water pump, which reduces parts such as water pumps, reduces costs, and reduces This reduces the difficulty of controlling the negative pressure liquid cooling system; at the same time, in the negative pressure liquid cooling system provided by the present invention, the vacuum pump not only provides negative pressure for the cooling liquid, but also provides power for the cooling liquid in the negative pressure liquid cooling system, and does not require The above functions can be achieved by modifying the vacuum pump structure and control.

Description of the drawings

In order to more clearly explain the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description The drawings illustrate some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting any creative effort.

Figure 1 shows a schematic diagram of the negative pressure liquid cooling system of the present invention when it is in a first state;

Figure 2 shows a schematic diagram of the negative pressure liquid cooling system of the present invention in the second state;

Figure 3 shows a schematic diagram of the negative pressure liquid cooling system of the present invention when it is in a third state.

Explanation of reference symbols:

1. The first liquid storage tank; 101. The first air inlet; 102. The first air outlet; 103. The first liquid inlet; 104. The first liquid outlet; 2. The second liquid storage tank; 201. Two air inlets; 202, second air outlet; 203, second liquid inlet; 204, second liquid outlet; 3, vacuum pump; 301, air inlet; 302, exhaust port; 4, heat exchanger; 401 , liquid inlet; 402, liquid outlet; 5, cold plate; 501, liquid inlet; 502, liquid outlet; 6, regulating structure; 601, pressure gauge; 602, electromagnetic regulating valve; 7, bubble detection structure; 8. Solenoid drain valve; 9, drain pipe; 10, first solenoid valve; 11, second solenoid valve; 12, third solenoid valve; 13, fourth solenoid valve; 14, fifth solenoid valve; 15, sixth Solenoid valve; 16. Seventh solenoid valve; 17. Eighth solenoid valve; 18. Flow meter.

Detailed ways

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limitations of the invention. Furthermore, the terms “first”, “second” and “third” are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in Figures 1 to 2, this embodiment discloses a negative pressure liquid cooling system, including a first liquid storage tank 1, a second liquid storage tank 2, a vacuum pump 3, a heat exchanger 4, a cold plate 5 and The controller is not shown in the drawings. The first liquid storage tank 1 includes a first air inlet 101, a first air outlet 102, a first liquid inlet 103 and a first liquid outlet 104; the second liquid storage tank 2 It includes a second air inlet 201, a second air outlet 202, a second liquid inlet 203 and a second liquid outlet 204; the vacuum pump 3 includes an air inlet 301 and an exhaust port 302, and the air inlet 301 and the first air outlet 102 and The second air outlets 202 are all connected, and the exhaust outlet 302 is connected to both the first air inlet 101 and the second air inlet 201; the heat exchanger 4 includes a liquid inlet 401 and a liquid outlet 402, and the liquid inlet 401 is connected to the first liquid outlet. The inlet 104 and the second liquid outlet 204 are both connected; the cold plate 5 includes a liquid inlet 501 and a liquid outlet 502. The liquid inlet 501 is connected with the liquid outlet 402, and the liquid outlet 502 is connected with the first liquid inlet 103 and the second liquid outlet 402. The liquid inlets 203 are all connected; among them, the negative pressure liquid cooling system has: a first air inlet 101 for air inlet, a second air outlet 202 for air outlet, the first liquid outlet 104 for liquid outlet, and the second liquid inlet 203 for liquid inlet. a first state; and a second state in which air is taken in through the second air inlet 201, air is discharged through the first air outlet 102, liquid is discharged through the second liquid outlet 204, and liquid is introduced into the first liquid inlet 103; the negative pressure liquid cooling system is suitable for Switch cyclically between the first state and the second state. The negative pressure liquid cooling system of this embodiment also includes a flow meter 18, which is provided on the upstream pipeline of the liquid inlet.

The negative pressure liquid cooling system provided by this embodiment includes a first liquid storage tank 1, a second liquid storage tank 2, a vacuum pump 3, a heat exchanger 4 and a cold plate 5. Under the action of the vacuum pump 3, the first liquid storage tank 1 and the second liquid storage tank 2 alternately switch between low pressure and high pressure to provide power for the circulation of coolant in the negative pressure liquid cooling system. The flow circulation of the coolant can be realized without a water pump, reducing the need for water pumps and other components. , reduces the cost, and also reduces the difficulty of controlling the negative pressure liquid cooling system; at the same time, in the negative pressure liquid cooling system provided by the present invention, the vacuum pump 3 not only provides negative pressure for the cooling liquid, but also can be used in the negative pressure liquid cooling system. Provides power for the coolant, and can realize the above functions without modifying the structure and control of the vacuum pump 3. The first liquid storage tank 1 and the second liquid storage tank 2 adjust the pressure of the coolant through a vacuum pump 3. The pressure of the coolant is lower than the atmospheric pressure of the external environment, and the coolant is in a negative pressure state, so there will be no problem of coolant leakage. It can also solve the heat dissipation problem of high-power, high-heat-flux-density chips.

In a specific implementation, the negative pressure liquid cooling system in this embodiment also includes a liquid level detection structure for detecting the liquid levels in the first liquid storage tank 1 and the second liquid storage tank 2 . When the liquid level in the second liquid storage tank 2 reaches the liquid level threshold, the negative pressure liquid cooling system switches from the first state to the second state; when the liquid level in the first liquid storage tank 1 reaches the liquid level threshold, the negative pressure liquid cooling system switches to the second state. The hydraulic cooling system switches from the second state to the first state. The coolant can be deionized water.

In the preferred embodiment, the first air inlet 101 and the first air outlet 102 are both arranged on the top of the first liquid storage tank 1, and the first liquid inlet 103 and the first liquid outlet 104 are both arranged on the first liquid storage tank 1. The bottom of the box 1 facilitates the discharge of cooling liquid and prevents the cooling liquid from overflowing through the first air inlet 101 and the first air outlet 102 .

In a specific embodiment, the vacuum pump 3 is a water ring vacuum pump 3 . Preferably, the rotation speed of the vacuum pump 3 can be adjusted through PID. By controlling the rotation speed to control the operating status of the components, the control results are accurate and can prevent the problem of difficulty in starting the vacuum pump 3 due to low voltage during voltage adjustment.

In a specific embodiment, the heat exchanger 4 is a condenser using an air-cooled heat dissipation method. There may be at least one cold plate 5 . When there are more than two cold plates 5 , the two or more cold plates 5 may be connected in series or in parallel to synchronously dissipate heat for large-scale electronic devices or multiple electronic devices.

The negative pressure liquid cooling system of this embodiment also includes an adjustment structure 6, which is provided on the upstream pipeline of the liquid inlet 401 and is suitable for adjusting the hydraulic pressure at the liquid inlet 501 to below atmospheric pressure. The adjusting structure 6 cooperates with the vacuum pump 3 to adjust the hydraulic pressure of the liquid inlet 501 to ensure that there will be no overflow of coolant at the cold plate 5 and to prevent electronic devices from being damaged by the overflowed coolant.

In this embodiment, the regulating structure 6 includes a pressure gauge 601 and an electromagnetic regulating valve 602. The pressure gauge 601 is provided on the connecting pipeline between the liquid outlet 402 and the liquid inlet 501 and is suitable for measuring hydraulic pressure; the electromagnetic regulating valve 602 and the pressure gauge 601 communication connection, suitable for adjusting the opening of the electromagnetic regulating valve 602 according to the measurement results of the pressure gauge 601. When the hydraulic pressure measured by the pressure gauge 601 is greater than the atmospheric pressure, the opening of the electromagnetic regulating valve 602 is reduced to increase the system flow resistance, so that the hydraulic pressure of the coolant entering the cold plate 5 is maintained at a negative pressure lower than the atmospheric pressure. Communication connections include wired connections through connecting wires, and network connections through 2G, 3G, 4G, 5G and WIFI. The pressure gauge 601 and the electromagnetic regulating valve 602 are both communicatively connected with the controller.

As shown in Figure 3, in this embodiment, a bubble detection structure 7 is provided on the downstream pipeline of the liquid discharge port 502. The negative pressure liquid cooling system is adapted to have a third state when the bubble detection structure 7 detects bubbles. The third state , the first air outlet 102 and the second air outlet 202 both outlet air, and the first liquid inlet 103 and the second liquid inlet 203 both enter liquid. When the bubble detection structure 7 detects bubbles, it indicates that there is damage in the negative pressure liquid cooling system. At this time, the machine should be shut down and the coolant should be recovered into the first liquid storage tank 1 and the second liquid storage tank 2 to prevent coolant leakage and damage. Electronic devices, then check for damage and repair them. In the preferred embodiment, when the negative pressure liquid cooling system is in the third state, the first liquid outlet 104 can also feed liquid into the first liquid storage tank 1, and the second liquid outlet 204 can also feed liquid into the second liquid storage tank 1. 2, liquid is fed in to increase the recovery speed of coolant. The negative pressure liquid cooling system can also enter the third state to recover the coolant when replacing coolant or transporting. The bubble detection structure 7 is communicatively connected with the controller.

The negative pressure liquid cooling system of this embodiment also includes an electromagnetic exhaust valve 8 and an exhaust pipe 9. One end of the exhaust pipe 9 is connected to the exhaust port 302 of the vacuum pump 3, and the other end is connected to the atmosphere; the electromagnetic exhaust valve 8 It is provided on the exhaust pipe 9 and is adapted to be opened when the negative pressure liquid cooling system is in the third state to discharge the gas in the first liquid storage tank 1 and the second liquid storage tank 2 to the external environment. The electromagnetic exhaust valve 8 is communicatively connected with the controller.

In a preferred embodiment, the sum of the volumes of the first liquid storage tank 1 and the second liquid storage tank 2 is greater than the content of the coolant in the negative pressure liquid cooling system.

As shown in Figures 1 to 3, the negative pressure liquid cooling system of this embodiment also includes a first switching structure, a second switching structure, a third switching structure and a fourth switching structure. The first switching structure is provided at the drain port. The downstream pipeline of 502 is suitable for controlling the opening and closing of the first liquid inlet 103 and the second liquid inlet 203; the second switching structure is provided on the upstream pipeline of the liquid inlet 401, and is suitable for controlling the first liquid outlet 104 and the second liquid inlet 203. The opening and closing of the second liquid outlet 204; the third switching structure is provided on the downstream pipeline of the exhaust port 302, suitable for controlling the opening and closing of the first air inlet 101 and the second air inlet 201; the fourth switching structure is provided On the upstream pipeline of the air inlet 301, it is suitable to control the opening and closing of the first air outlet 102 and the second air outlet 202.

In this embodiment, the first switching structure includes a first solenoid valve 10 and a second solenoid valve 11. The first solenoid valve 10 is provided on the connecting pipeline between the liquid discharge port 502 and the first liquid inlet 103; the second solenoid valve 11 It is provided on the connecting pipeline between the liquid discharge port 502 and the second liquid inlet 203 . Both the first solenoid valve 10 and the second solenoid valve 11 are communicatively connected with the controller.

As an alternative embodiment, the first switching structure may be an electromagnetic three-way valve, which is connected to the liquid discharge port 502, the first liquid inlet 103, and the second liquid inlet 203 respectively.

In this embodiment, the second switching structure includes a third solenoid valve 12 and a fourth solenoid valve 13. The third solenoid valve 12 is provided on the connecting pipeline between the liquid inlet 401 and the first liquid outlet 104; the fourth solenoid valve 13 is provided On the connecting pipeline between the liquid inlet 401 and the second liquid outlet 204. The third solenoid valve 12 and the fourth solenoid valve 13 are both communicatively connected with the controller.

As an alternative implementation, the second switching structure may be an electromagnetic three-way valve, which is connected to the liquid inlet 401, the first liquid outlet 104, and the second liquid outlet 204 respectively.

In this embodiment, the third switching structure includes a fifth solenoid valve 14 and a sixth solenoid valve 15. The fifth solenoid valve 14 is provided on the connecting pipeline between the exhaust port 302 and the first air inlet 101; the sixth solenoid valve 15 It is provided on the connecting pipeline between the exhaust port 302 and the second air inlet 201. The fifth solenoid valve 14 and the sixth solenoid valve 15 are both communicatively connected with the controller.

As an alternative embodiment, the third switching structure may be an electromagnetic three-way valve, which is connected to the exhaust port 302, the first air inlet 101, and the second air inlet 201 respectively.

In this embodiment, the fourth switching structure includes a seventh solenoid valve 16 and an eighth solenoid valve 17; the seventh solenoid valve 16 is disposed on the connecting pipeline between the air inlet 301 and the first air outlet 102; the eighth solenoid valve 17 is disposed on On the connecting pipeline between the air inlet 301 and the second air outlet 202.

As an alternative implementation, the fourth switching structure may be an electromagnetic three-way valve, which is connected to the air inlet 301, the first air outlet 102, and the second air outlet 202 respectively.

In a preferred embodiment, all connecting pipelines of the negative pressure liquid cooling system are transparent pipelines that can withstand negative pressure, and bubbles inside the pipelines can be directly observed.

The operation process of the negative pressure liquid cooling system in this embodiment includes a first state, a second state and a third state. In the first state, when the coolant in the first liquid storage tank 1 reaches the liquid level threshold, the second solenoid valve 11, the third solenoid valve 12, the fifth solenoid valve 14, the eighth solenoid valve 17 and the solenoid regulating valve 602 are opened. , the vacuum pump 3 is started, air is taken in from the first air inlet 101, air is discharged from the second air outlet 202, liquid is discharged from the first liquid outlet 104, and the coolant passes from the first liquid storage tank 1 through the electromagnetic regulating valve 602 and the heat exchanger 4 After cooling with the cold plate 5, it enters the second liquid storage tank 2 through the second liquid inlet 203, until the cooling liquid in the second liquid storage tank 2 reaches the liquid level threshold and switches to the second state; in the second state, the second liquid storage tank 2 When the coolant in the liquid tank 2 reaches the liquid level threshold, the first solenoid valve 10, the fourth solenoid valve 13, the seventh solenoid valve 16, the sixth solenoid valve 15 and the solenoid regulating valve 602 are opened, the vacuum pump 3 is started, and the second inlet valve is opened. Air enters through the air port 201, air comes out of the first air outlet 102, and liquid comes out of the second liquid outlet 204. The coolant passes from the second liquid storage tank 2 through the electromagnetic regulating valve 602, the heat exchanger 4 and the cold plate 5 and then passes through the first The liquid inlet 103 enters the first liquid storage tank 1 until the cooling liquid in the first liquid storage tank 1 reaches the liquid level threshold and switches to the first state. In the third state, the first solenoid valve 10, the second solenoid valve 11, the third solenoid valve 12, the fourth solenoid valve 13, the seventh solenoid valve 16, the eighth solenoid valve 17, the solenoid regulating valve 602 and the solenoid exhaust valve 8 are all opened, the vacuum pump 3 is started, the first air outlet 102 and the second air outlet 202 discharge the gas, and the gas is discharged to the external environment through the exhaust port 302; the coolant part passes through the first liquid inlet 103 and the first liquid outlet 104 It is recovered into the first liquid storage tank 1, and part of it is recovered into the second liquid storage tank 2 through the second liquid inlet 203 and the second liquid outlet 204. If the first liquid storage tank 1 and/or the second liquid storage tank 2 When the liquid level threshold is reached, the corresponding solenoid valve is closed.

Obviously, the above-mentioned embodiments are only examples for clear explanation and are not intended to limit the implementation. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. An exhaustive list of all implementations is neither necessary nor possible. The obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims (8)

1. A negative pressure liquid cooling system, characterized by including: The first liquid storage tank (1) includes a first air inlet (101), a first air outlet (102), a first liquid inlet (103) and a first liquid outlet (104); The second liquid storage tank (2) includes a second air inlet (201), a second air outlet (202), a second liquid inlet (203) and a second liquid outlet (204); The vacuum pump (3) includes an air inlet (301) and an exhaust port (302). The air inlet (301) is connected to both the first air outlet (102) and the second air outlet (202), so The exhaust port (302) is connected to both the first air inlet (101) and the second air inlet (201); The heat exchanger (4) includes a liquid inlet (401) and a liquid outlet (402). The liquid inlet (401) is connected to both the first liquid outlet (104) and the second liquid outlet (204); The cold plate (5) includes a liquid inlet (501) and a liquid outlet (502). The liquid inlet (501) is connected to the liquid outlet (402), and the liquid outlet (502) is connected to the liquid outlet (402). The first liquid inlet (103) and the second liquid inlet (203) are both connected; Wherein, the negative pressure liquid cooling system has: the first air inlet (101) takes in air, the second air outlet (202) discharges air, the first liquid outlet (104) discharges liquid, and the The second liquid inlet (203) is in the first state of liquid inlet; and the second air inlet (201) is inlet, the first air outlet (102) is out, and the second liquid outlet (204) Liquid is discharged, and the first liquid inlet (103) enters the second state of liquid; the negative pressure liquid cooling system is suitable for cyclic switching between the first state and the second state; A bubble detection structure (7) is provided on the downstream pipeline of the liquid discharge port (502), and the negative pressure liquid cooling system is adapted to have a third state when the bubble detection structure (7) detects bubbles. In the third state, the first air outlet (102) and the second air outlet (202) both outlet air, and the first liquid inlet (103) and the second liquid inlet (203) both inlet. liquid; Electromagnetic evacuation valve (8) and evacuation pipe (9). One end of the evacuation pipe (9) is connected to the exhaust port (302) of the vacuum pump (3), and the other end is connected to the atmosphere; the electromagnetic evacuation pipe (9) is connected to the exhaust port (302) of the vacuum pump (3). A drain valve (8) is provided on the drain pipe (9) and is adapted to be opened when the negative pressure liquid cooling system is in the third state; All connecting pipes of the negative pressure liquid cooling system are transparent pipes. 2. The negative pressure liquid cooling system according to claim 1, further comprising an adjustment structure (6) disposed on the upstream pipeline of the liquid inlet (401), adapted to adjust the liquid inlet (401). The hydraulic pressure at 501) is adjusted below atmospheric pressure. 3. The negative pressure liquid cooling system according to claim 2, characterized in that the adjustment structure (6) includes: A pressure gauge (601) is provided on the connecting pipeline between the liquid outlet (402) and the liquid inlet (501), suitable for measuring hydraulic pressure; The electromagnetic regulating valve (602) is communicatively connected with the pressure gauge (601), and is adapted to adjust the opening of the electromagnetic regulating valve (602) according to the measurement results of the pressure gauge (601). 4. The negative pressure liquid cooling system according to any one of claims 1-3, further comprising: A first switching structure is provided on the downstream pipeline of the liquid discharge port (502), and is suitable for controlling the opening and closing of the first liquid inlet (103) and the second liquid inlet (203); A second switching structure is provided on the upstream pipeline of the liquid inlet (401), and is suitable for controlling the opening and closing of the first liquid outlet (104) and the second liquid outlet (204); A third switching structure is provided on the downstream pipeline of the exhaust port (302), and is suitable for controlling the opening and closing of the first air inlet (101) and the second air inlet (201); The fourth switching structure is provided on the upstream pipeline of the air inlet (301), and is suitable for controlling the opening and closing of the first air outlet (102) and the second air outlet (202). 5. The negative pressure liquid cooling system according to claim 4, wherein the first switching structure includes: The first solenoid valve (10) is provided on the connecting pipeline between the liquid discharge port (502) and the first liquid inlet (103); The second solenoid valve (11) is provided on the connecting pipeline between the liquid discharge port (502) and the second liquid inlet (203). 6. The negative pressure liquid cooling system according to claim 4, characterized in that the second switching structure includes: A third solenoid valve (12) is provided on the connecting pipeline between the liquid inlet (401) and the first liquid outlet (104); The fourth solenoid valve (13) is provided on the connecting pipeline between the liquid inlet (401) and the second liquid outlet (204). 7. The negative pressure liquid cooling system according to claim 4, wherein the third switching structure includes: The fifth solenoid valve (14) is provided on the connecting pipeline between the exhaust port (302) and the first air inlet (101); The sixth solenoid valve (15) is provided on the connecting pipeline between the exhaust port (302) and the second air inlet (201). 8. The negative pressure liquid cooling system according to claim 4, wherein the fourth switching structure includes: A seventh solenoid valve (16) is provided on the connecting pipeline between the air inlet (301) and the first air outlet (102); The eighth solenoid valve (17) is provided on the connecting pipeline between the air inlet (301) and the second air outlet (202).