High reliability liquid cooling system and control method

Abstract

The present invention relates to the technical field of heat dissipation equipment, and specifically discloses a high-reliability liquid cooling system and control method, wherein the high-reliability liquid cooling system comprises a primary pipeline for the flow of a primary coolant, a secondary pipeline for the flow of a secondary refrigerant, a main drive device for driving the flow of the secondary refrigerant, a heat exchanger for heat exchange between the primary coolant and the secondary refrigerant, a pre-pump liquid storage tank connected to the secondary pipeline, and a vacuum pumping device connected to the pre-pump liquid storage tank, a pressure relief pipeline is provided between the outlet of the main drive device and the inlet of the pre-pump liquid storage tank, and a pressure relief valve is provided on the pressure relief pipeline. The present invention provides a high-reliability liquid cooling system and control method, which can effectively relieve pressure when the outlet pressure of the main drive device is too high, thereby preventing the pressure in the secondary pipeline from being higher than the atmospheric pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation equipment, and in particular to a high-reliability liquid cooling system and a control method. Background Art

[0002] See also Figure 1 A liquid cooling system has been developed, which includes a primary pipeline 101 for the flow of a primary coolant, a secondary pipeline 201 for the flow of a secondary refrigerant, and a heat exchanger 3 for exchanging heat between the primary coolant and the secondary refrigerant.

[0003] Among them, a pre-pump liquid storage tank 203 is provided on the secondary pipeline 201, and the pre-pump liquid storage tank 203 is connected to the air suction port of the vacuum pumping device 503, and the exhaust port of the vacuum pumping device 503 is connected to the post-pump liquid storage tank 505 through the post-pump gas-liquid separator 504, and the post-pump liquid storage tank 505 is connected to the pre-pump liquid storage tank 203 through the pre-pump liquid replenishing valve 506. Further, when the vacuum pumping device 503 is a water ring vacuum pump with a liquid replenishing port, the post-pump liquid storage tank 505 is also connected to the liquid replenishing port of the vacuum pumping device 503, so as to provide cooling liquid for the vacuum pumping device 503.

[0004] The working process of the existing liquid cooling system is as follows:

[0005] ① The primary coolant with a lower temperature flows in the primary pipeline 101. When it flows through the heat exchanger 3, it transfers the cold to the secondary refrigerant in the secondary pipeline 201, and its own temperature rises, and then flows out of the heat exchanger 3; after the subsequent cooling treatment, the primary coolant will re-enter the heat exchanger 3, thereby realizing the refrigerant circulation of the primary pipeline 101;

[0006] ② The main driving device 202 drives the secondary refrigerant with a higher temperature to flow in the secondary pipeline 201. When flowing through the heat exchanger 3, it absorbs the cold from the primary refrigerant, and its own temperature drops, and then flows out of the heat exchanger 3. The cooled secondary refrigerant flows through the server chip waiting for the heat dissipation device 4, so that the temperature of the heat dissipation device 4 is reduced; after absorbing the heat of the heat dissipation device 4, the secondary refrigerant itself The temperature rises and re-enters the heat exchanger 3, thereby realizing the refrigerant circulation of the secondary pipeline 201;

[0007] ③ In order to prevent the secondary refrigerant in the secondary pipeline 201 from leaking, a pre-pump liquid storage tank 203 is added to the secondary pipeline 201. The lower part of the pre-pump liquid storage tank 203 is connected to the secondary pipeline 201, and the upper part is connected to the vacuum pumping device 503. Under normal circumstances, the vacuum pumping device 503 will evacuate the pre-pump liquid storage tank 203 to make the air pressure in the pre-pump liquid storage tank 203 lower than the external atmospheric pressure. In this way, even if the secondary pipeline 201 leaks, the secondary refrigerant will not leak due to the pressure difference between the inside and the outside, thereby avoiding environmental pollution and ensuring the safety of the heat dissipation device 4;

[0008] Specifically, the vacuum device 503 controls the vacuum degree of the liquid storage tank 203 in front of the pump, and sends the gas-liquid mixture in the liquid storage tank 203 in front of the pump to the gas-liquid separator 504 in the back of the pump. The gas is discharged through the exhaust valve 5041 on the top of the gas-liquid separator 504 in the back of the pump, and the liquid enters the liquid storage tank 505 in the back of the pump. Under normal circumstances, the liquid storage tank 505 in the back of the pump normally supplies liquid to the vacuum device 503. When the liquid level in the liquid storage tank 203 in front of the pump is too low, the liquid replenishing valve 506 in front of the pump is opened, and the liquid storage tank 505 in the back of the pump can supply liquid to the liquid storage tank 203 in front of the pump. When the liquid level in the liquid storage tank 505 in the back of the pump is too low, secondary refrigerant can be replenished through the liquid replenishing pipeline 602.

[0009] In the existing liquid cooling system, it is necessary to keep the pressure difference between the secondary refrigerant and the heat dissipation device 4 stable before and after the heat exchange. For example, the pressure before the heat exchange between the secondary refrigerant and the heat dissipation device 4 is recorded as pressure P21, and the pressure after the heat exchange between the secondary refrigerant and the heat dissipation device 4 is recorded as pressure P22. If the control target is "(pressure P21-pressure P22)∈[0.49bar, 0.51bar]", then when (pressure P21-pressure P22) < 0.49bar, it is necessary to increase the speed of the main drive device 202 so that (pressure P21-pressure P22) falls within the interval [0.49bar, 0.51bar]. On the contrary, when (pressure P21-pressure P22) > 0.51bar, it is necessary to reduce the speed of the main drive device 202 so that (pressure P21-pressure P22) falls within the interval [0.49bar, 0.51bar].

[0010] Obviously, the high point of the secondary refrigerant pressure is at the outlet of the main drive device 202, that is, the pressure P21. It is understandable that when the difference between the pressure P21 and the pressure P22 is too small, the rotation speed of the main drive device 202 will continue to increase, and during this process, the pressure P21 is also increasing. This leads to the following safety hazards: until the pressure P21 is equal to the external atmospheric pressure, the difference between the pressure P21 and the pressure P22 is still too small. At this time, if the rotation speed of the main drive device 202 continues to increase, the pressure P21 will be greater than the external atmospheric pressure. When the pressure P21 is greater than the external atmospheric pressure, once the secondary pipeline 201 is damaged, the secondary refrigerant will leak out, and the system loses its important role in preventing leakage.

[0011] Therefore, it is necessary to improve the existing liquid cooling system to solve the problem that the outlet pressure of the main drive device cannot be effectively prevented from leaking when it is too high.

[0012] The above information disclosed in this Background section is included only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not form the prior art that is currently known to a person of ordinary skill in the art. Summary of the invention

[0013] An object of the present invention is to provide a highly reliable liquid cooling system and control method, which can effectively relieve pressure when the outlet pressure of the main drive device is too high, thereby preventing the pressure in the secondary pipeline from being higher than the atmospheric pressure.

[0014] To achieve the above objectives, on the one hand, the present invention provides a highly reliable liquid cooling system, comprising a primary pipeline for a primary coolant to flow, a secondary pipeline for a secondary refrigerant to flow, a main driving device for driving the secondary refrigerant to flow, a heat exchanger for exchanging heat between the primary coolant and the secondary refrigerant, a pre-pump liquid storage tank connected to the secondary pipeline, and a vacuum pumping device connected to the pre-pump liquid storage tank.

[0015] A pressure relief pipeline is provided between the outlet of the main driving device and the inlet of the pre-pump liquid storage tank, and a pressure relief valve is provided on the pressure relief pipeline.

[0016] Optionally, the exhaust port of the vacuum equipment is connected to the liquid storage tank behind the pump through a gas-liquid separator behind the pump; the outlet of the liquid storage tank behind the pump is connected to the liquid replenishment port of the vacuum equipment, and the outlet of the liquid storage tank behind the pump is connected to the inlet of the liquid storage tank before the pump through a liquid replenishment valve before the pump.

[0017] Optionally, the post-pump liquid storage tank is connected to the liquid replenishment tank via a liquid replenishment pipeline, and the liquid replenishment pipeline is provided with an external liquid replenishment valve, a liquid replenishment drive device and a liquid replenishment one-way valve.

[0018] Optionally, the pipe section between the main driving device and the pressure relief valve is connected to the pipe section between the external fluid replenishment valve and the fluid replenishment driving device through a post-pump fluid replenishment valve.

[0019] Optionally, the rear liquid storage tank of the pump is also connected to a drain pipeline, and a drain valve is provided on the drain pipeline.

[0020] Optionally, a pre-pump gas-liquid separator and a vacuum check valve are provided between the pre-pump liquid storage tank and the vacuum pumping equipment.

[0021] Optionally, the liquid outlet of the pre-pump gas-liquid separator is connected to the pipe section between the pre-pump liquid replenishing valve and the pre-pump liquid storage tank.

[0022] On the other hand, a control method is provided, applicable to the high-reliability liquid cooling system, comprising:

[0023] The pressure P21 at the outlet of the main drive device is obtained, and when the pressure P21 meets a preset condition, the pressure relief valve is opened.

[0024] Optionally, the exhaust port of the vacuum pumping device is connected to the liquid storage tank behind the pump through the gas-liquid separator behind the pump; the outlet of the liquid storage tank behind the pump is connected to the liquid filling port of the vacuum pumping device, and the outlet of the liquid storage tank behind the pump is connected to the inlet of the liquid storage tank before the pump through the liquid filling valve before the pump:

[0025] The control method further comprises:

[0026] When the temperature in the liquid storage tank after the pump is too high, the liquid replenishing valve before the pump is opened to replenish the liquid into the liquid storage tank before the pump.

[0027] Optionally, the post-pump liquid storage tank is connected to the liquid replenishment tank via a liquid replenishment pipeline, and the pipe section between the main drive device and the pressure relief valve is connected to the liquid replenishment pipeline via a post-pump liquid replenishment valve:

[0028] The control method further comprises:

[0029] When the liquid level of the liquid storage tank after the pump is too low, the liquid level state of the liquid storage tank before the pump is detected:

[0030] If the liquid level of the liquid storage tank before the pump is too low, the liquid storage tank after the pump is replenished with liquid through the liquid replenishment tank;

[0031] Otherwise, open the post-pump liquid replenishing valve to replenish liquid into the post-pump liquid storage tank.

[0032] The beneficial effect of the present invention is that it provides a highly reliable liquid cooling system, i.e., a control method, wherein the main drive device drives the secondary refrigerant to flow forward, thereby cooling the heat dissipation device, and the heated secondary refrigerant returns to the heat exchanger through the pre-pump liquid storage tank, absorbs the coldness of the primary refrigerant in the primary pipeline, recovers to a low temperature, and then enters the main drive device again, thereby realizing the circulation of the secondary refrigerant. In this process, if the pressure P21 at the outlet of the main drive device is too high, the system automatically opens the pressure relief valve, so that part of the secondary refrigerant at the outlet of the main drive device flows directly to the pre-pump liquid storage tank, causing the pressure P21 to drop suddenly, so as to prevent the pressure in the secondary pipeline from being greater than the atmospheric pressure, causing the entire system to lose the negative pressure anti-leakage function. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0034] Figure 1 It is a structural schematic diagram of an existing liquid cooling system;

[0035] Figure 2 A schematic diagram of the structure of a high-reliability liquid cooling system provided in an embodiment;

[0036] Figure 3 A flow chart of a control method provided in an embodiment.

[0037] In the figure:

[0038] 101. Primary pipeline;

[0039] 201, secondary pipeline; 202, main drive device; 203, front pump liquid storage tank;

[0040] 3. Heat exchanger;

[0041] 4. Components to be cooled;

[0042] 501, gas-liquid separator before the pump; 502, air extraction check valve; 503, vacuum extraction equipment; 504, gas-liquid separator after the pump; 5041, exhaust valve; 505, liquid storage tank after the pump; 506, liquid replenishing valve before the pump;

[0043] 601, liquid replenishment tank; 602, liquid replenishment pipeline; 603, external liquid replenishment valve; 604, liquid replenishment drive device; 605, liquid replenishment check valve; 606, post-pump liquid replenishment valve;

[0044] 701. Drainage pipeline; 702. Drainage valve;

[0045] 801. Pressure relief pipeline; 802. Pressure relief valve. DETAILED DESCRIPTION

[0046] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it is to be understood that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally disposed component. When a component is considered to be "disposed on" another component, it may be directly disposed on the other component or there may be a centrally disposed component.

[0048] In addition, terms such as "long", "short", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention. They do not indicate or imply that the device or component referred to must have this specific direction or operate with a specific direction structure, and should not be understood as a limitation of the present invention.

[0049] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0050] The present invention provides a high-reliability liquid cooling system and a control method based on the high-reliability liquid cooling system, which are suitable for application scenarios where heat is dissipated by a server waiting for a heat dissipation device.

[0051] Next, various implementations of the high-reliability liquid cooling system and control method of the present invention are introduced in conjunction with the accompanying drawings.

[0052] Example 1

[0053] like Figure 2 As shown, a high-reliability liquid cooling system according to Example 1 of the present invention is introduced, which includes a primary pipeline 101 for the flow of a primary coolant, a secondary pipeline 201 for the flow of a secondary refrigerant, a main driving device 202 for driving the flow of the secondary refrigerant, a heat exchanger 3 for performing heat exchange between the primary coolant and the secondary refrigerant, a pre-pump liquid storage tank 203 connected to the secondary pipeline 201, and a vacuum pumping device 503 connected to the pre-pump liquid storage tank 203. A pressure relief pipeline 801 is provided between the outlet of the main driving device 202 and the inlet of the pre-pump liquid storage tank 203, and a pressure relief valve 802 is provided on the pressure relief pipeline 801.

[0054] It should be noted that, generally, the main drive device 202 drives the secondary refrigerant to flow forward, and then cools the heat dissipation device 4. The heated secondary refrigerant returns to the heat exchanger 3 through the pre-pump liquid storage tank 203, absorbs the coldness of the primary refrigerant in the primary pipeline 101, recovers to a low temperature, and then enters the main drive device 202 again, thereby realizing the circulation of the secondary refrigerant. In this process, if the pressure P21 at the outlet of the main drive device 202 is too high (for example, higher than 1 bar or higher than 0.95 bar), the system automatically opens the pressure relief valve 802, so that part of the secondary refrigerant at the outlet of the main drive device 202 flows directly to the pre-pump liquid storage tank 203, so that the pressure P21 drops suddenly, so as to prevent the pressure in the secondary pipeline 201 from being greater than the atmospheric pressure, causing the entire system to lose the negative pressure leakage prevention function.

[0055] Optionally, the primary coolant and the secondary refrigerant can be any liquid working fluid, such as water, ethylene glycol solution, propylene glycol solution, fluorinated liquid, etc. The present invention is not limited to this. In this embodiment, the primary coolant and the secondary refrigerant are both selected as water for introduction.

[0056] In this embodiment, the exhaust port of the vacuum device 503 is connected to the rear-pump liquid storage tank 505 through the rear-pump gas-liquid separator 504; the outlet of the rear-pump liquid storage tank 505 is connected to the liquid replenishment port of the vacuum device 503, and the outlet of the rear-pump liquid storage tank 505 is connected to the inlet of the front-pump liquid storage tank 203 through the front-pump liquid replenishment valve 506. Specifically, after the gas-liquid mixture at the exhaust port of the vacuum device 503 enters the rear-pump gas-liquid separator 504, the gas is discharged through the exhaust valve 5041 at the top of the vacuum device 503, and the liquid enters the rear-pump liquid storage tank 505. In this embodiment, the vacuum device 503 is a water ring vacuum pump. Under normal circumstances, the liquid replenishment port of the vacuum device 503 takes liquid from the rear-pump liquid storage tank 505 to achieve cooling. Normally, the pre-pump refill valve 506 is closed. Only under specific circumstances (for example, when the temperature of the secondary refrigerant in the post-pump liquid storage tank 505 is too high), the pre-pump refill valve 506 will be opened. Under the action of the pressure difference, the secondary refrigerant flows from the post-pump liquid storage tank 505 to the pre-pump liquid storage tank 203.

[0057] In this embodiment, a pre-pump gas-liquid separator 501 and an air extraction check valve 502 are provided between the pre-pump liquid storage tank 203 and the vacuum pumping device 503. Furthermore, the liquid outlet of the pre-pump gas-liquid separator 501 is connected to the pipe section between the pre-pump liquid replenishing valve 506 and the pre-pump liquid storage tank 203. The pre-pump gas-liquid separator 501 can play the role of a gas-liquid separator and filter impurities, thereby reducing the liquid content of the gas-liquid mixture entering the vacuum pumping device 503. The air extraction check valve 502 can prevent external gas from entering the pre-pump liquid storage tank 203 when the vacuum pumping device 503 is damaged, thereby improving the reliability of the negative pressure system.

[0058] Optionally, the post-pump liquid storage tank 505 is connected to a liquid replenishment tank 601 for storing secondary refrigerant through a liquid replenishment pipeline 602, and the liquid replenishment pipeline 602 is provided with an external liquid replenishment valve 603, a liquid replenishment drive device 604 and a liquid replenishment check valve 605. When the liquid in the pre-pump liquid storage tank 203 and the post-pump liquid storage tank 505 are both too low, it means that the secondary refrigerant in the entire system is insufficient. At this time, it is necessary to replenish the secondary refrigerant from the liquid replenishment tank 601 to the secondary pipeline 201.

[0059] Furthermore, the pipe section between the main driving device 202 and the pressure relief valve 802 is connected to the pipe section between the external refilling valve 603 and the refilling driving device 604 through the post-pump refilling valve 606. If the liquid level in the pre-pump liquid storage tank 203 is not too low, but the liquid level in the post-pump liquid storage tank 505 is too low, the post-pump refilling valve 606 and the refilling driving device 604 can be opened to transfer the secondary refrigerant in the pre-pump liquid storage tank 203 to the post-pump liquid storage tank 505.

[0060] Optionally, the post-pump liquid storage tank 505 is also connected to a drain pipeline 701, and a drain valve 702 is provided on the drain pipeline 701. After running for a period of time, when there are too many secondary refrigerant impurities in the secondary pipeline 201 or the temperature is too high or the system needs to be repaired, the drain valve 702 is opened to discharge the secondary refrigerant in the secondary pipeline 201.

[0061] The high-reliability liquid cooling system provided in this embodiment has the following working process:

[0062] ① During the initial operation, the secondary pipeline 201 is first filled with liquid, and the external liquid replenishing valve 603 and the liquid replenishing drive device 604 are opened. The secondary refrigerant enters the rear-pump liquid storage tank 505 through the liquid replenishing pipeline 602. When the water level in the rear-pump liquid storage tank 505 rises to the high water level switch of the rear-pump liquid storage tank 505, the front-pump liquid replenishing valve 506 is opened, and the liquid replenishing enters the front-pump liquid storage tank 203. When the water level in the front-pump liquid storage tank 203 rises to the position of the low water level switch in the front-pump liquid storage tank 203, the main drive device 202 is opened to put the entire system into operation, and the liquid replenishing operation is continued until the liquid level in the front-pump liquid storage tank 203 reaches the position of the high water level switch in the front liquid storage tank 203. Then the front-pump liquid replenishing valve 506 can be closed first, and then the liquid replenishing drive device 604 can be closed, and finally the external liquid replenishing valve 603 can be closed to complete the liquid filling operation during the initial operation.

[0063] ② The primary refrigerant in the primary pipeline 101 flows through the heat exchanger 3, providing cooling capacity for the secondary refrigerant in the secondary pipeline 201, thereby causing the secondary refrigerant to cool down;

[0064] ③ Under the drive of the main drive device 202, the secondary refrigerant flows forward and exchanges heat with the heat dissipation device 4 to cool the heat dissipation device 4. The heated secondary refrigerant enters the pre-pump liquid storage tank 203 and then returns to the heat exchanger 3 to form a cycle. In this process, if the pressure at the outlet of the main drive device 202 is too high, the pressure relief valve 802 can be opened to relieve the pressure to prevent the pressure in the secondary pipeline 201 from being greater than the atmospheric pressure.

[0065] ④ The vacuum pumping device 503 controls the vacuum degree of the liquid storage tank 203 in front of the pump, and sends the gas-liquid mixture in the liquid storage tank 203 in front of the pump to the gas-liquid separator 504 after the pump, and the gas is discharged through the exhaust valve 5041 on the top of the gas-liquid separator 504 after the pump, and the liquid enters the liquid storage tank 505 after the pump; the liquid storage tank 505 after the pump normally supplies liquid to the vacuum pumping device 503, and when necessary, the liquid storage tank 505 after the pump also supplies liquid to the liquid storage tank 203 in front of the pump; when the liquid level in the liquid storage tank 505 after the pump is too low, liquid can be replenished through the liquid replenishing valve 606 after the pump or the external liquid replenishing valve 603.

[0066] Example 2

[0067] like Figure 3As shown, the control method of embodiment 2 of the present invention is introduced, which is applicable to Figure 2 The high-reliability liquid cooling system provided in the embodiment 1 shown has the same functions and technical effects.

[0068] The control method comprises the following steps:

[0069] S10: Obtain the pressure P21 at the outlet of the main driving device 202, and when the pressure P21 meets a preset condition, open the pressure relief valve 802;

[0070] After the pressure relief valve 802 is opened, the secondary refrigerant at the outlet of the main drive device 202 will flow directly to the pre-pump liquid storage tank 203 through the pressure relief valve 802, thereby preventing the pressure in the secondary pipeline 201 from being greater than the atmospheric pressure, causing the anti-leakage function of the negative pressure system to fail. Generally, it can be set that when the pressure P21> (1bar-margin value), the pressure relief valve 802 can be automatically controlled to open. Among them, the margin value can be 0.03bar~0.05bar.

[0071] S20: Obtain the temperature T5 of the secondary refrigerant in the liquid storage tank 505 after the pump. When the temperature T5 in the liquid storage tank 505 after the pump is too high, open the liquid replenishing valve 506 before the pump to replenish the liquid in the liquid storage tank 203 before the pump.

[0072] After the pre-pump refill valve 506 is opened, the secondary refrigerant in the post-pump refill tank 505 will flow directly to the pre-pump refill tank 203 through the pre-pump refill valve 506, and then enter the heat exchanger 3 to participate in heat exchange and achieve cooling. Generally, it can be set that when the temperature T5>60°C, it is considered that the secondary refrigerant in the post-pump refill tank 505 has lost its heat dissipation capacity, which is not conducive to the heat dissipation of the vacuum pumping equipment 503, and the pre-pump refill valve 506 can be automatically controlled to open.

[0073] S30: Obtain the liquid level of the liquid storage tank 505 after the pump:

[0074] S301: When the liquid level of the post-pump liquid storage tank 505 is too low, the liquid level state of the pre-pump liquid storage tank 203 is detected: if the liquid level of the pre-pump liquid storage tank 203 is too low, the post-pump liquid storage tank 505 is replenished with liquid through the liquid replenishing tank 601; otherwise, the post-pump liquid replenishing valve 606 is opened to replenish liquid to the post-pump liquid storage tank 505;

[0075] Generally, if the secondary refrigerant in the secondary pipeline 201 is sufficient, when the liquid level of the post-pump liquid storage tank 505 is too low, the liquid level of the pre-pump liquid storage tank 203 should be at a higher level. At this time, the secondary refrigerant in the pre-pump liquid storage tank 203 can be transferred to the post-pump liquid storage tank 505 by opening the post-pump liquid replenishment valve 606 and the liquid replenishment drive device 604, so as to avoid insufficient coolant in the vacuum equipment 503 and affect the normal operation of the vacuum equipment 503.

[0076] In extreme cases, if the secondary refrigerant in the secondary pipeline 201 is insufficient due to leakage or other factors, when the liquid level of the rear-pump liquid storage tank 505 is too low, the liquid level of the front-pump liquid storage tank 203 will also be at a lower level, that is, the secondary refrigerant in both the front-pump liquid storage tank 203 and the rear-pump liquid storage tank 505 is insufficient. At this time, it is necessary to open the external liquid replenishment valve 603 and the liquid replenishment drive device 604, and then transfer the secondary refrigerant in the liquid replenishment tank 601 to the rear-pump liquid storage tank 505, and then enter the front-pump liquid storage tank 203 through the front-pump liquid replenishment valve 506 to ensure the normal operation of the entire system.

[0077] Optionally, a pressure level sensor or a float level switch may be designed to monitor the liquid levels of the pre-pump liquid storage tank 203 and the post-pump liquid storage tank 505. However, this is not the focus of the present application and will not be elaborated on herein.

[0078] S302: When the liquid level of the post-pump liquid storage tank 505 is too high, detect the liquid level status of the pre-pump liquid storage tank 203: If the liquid level of the pre-pump liquid storage tank 203 is too high, open the drain valve 702 to discharge the excess secondary refrigerant in the secondary pipeline 201 through the drain pipeline 701; otherwise, open the pre-pump replenishing valve 506 to replenish the pre-pump liquid storage tank 203.

[0079] The high-reliability liquid cooling system and control method provided by the present invention have the following advantages:

[0080] ① By controlling the opening timing of the pressure relief valve 802, it is possible to ensure that the pressure in the secondary pipeline 201 is not higher than the atmospheric pressure, thereby preventing the system's negative pressure leakage prevention function from failing;

[0081] ② By controlling the opening timing of the liquid replenishing valve 506 before the pump, the secondary refrigerant in the liquid storage tank 505 after the pump can be ensured to be at a suitable temperature, so as to avoid the secondary refrigerant in the liquid storage tank 505 after the pump being too high in temperature, causing the vacuum device to work abnormally;

[0082] ③ By controlling the opening timing of the post-pump replenishment valve 606, the external replenishment valve 603 and the drain valve 702, the secondary refrigerant in the pre-pump liquid storage tank 203 and the post-pump liquid storage tank 505 is effectively ensured to be at an appropriate liquid level, avoiding the pre-pump liquid storage tank 203 and the post-pump liquid storage tank 505 from working in the absence of liquid or in the presence of rich liquid.

[0083] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0084] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-reliability liquid cooling system, comprising a primary pipeline (101) for a primary coolant to flow, a secondary pipeline (201) for a secondary refrigerant to flow, a main driving device (202) for driving the secondary refrigerant to flow, a heat exchanger (3) for exchanging heat between the primary coolant and the secondary refrigerant, a pre-pump liquid storage tank (203) connected to the secondary pipeline (201), and a vacuum pumping device (503) connected to the pre-pump liquid storage tank (203), characterized in that: A pressure relief pipeline (801) is provided between the outlet of the main driving device (202) and the inlet of the pre-pump liquid storage tank (203), and a pressure relief valve (802) is provided on the pressure relief pipeline (801); A pre-pump gas-liquid separator (501) and a gas extraction check valve (502) are provided between the pre-pump liquid storage tank (203) and the vacuum extraction device (503); The exhaust port of the vacuum pumping device (503) is connected to the post-pump liquid storage tank (505) via the post-pump gas-liquid separator (504); the outlet of the post-pump liquid storage tank (505) is connected to the liquid replenishment port of the vacuum pumping device (503); and the outlet of the post-pump liquid storage tank (505) is connected to the inlet of the pre-pump liquid storage tank (203) via the pre-pump liquid replenishment valve (506).

2. The high reliability liquid cooling system according to claim 1, characterized in that: The post-pump liquid storage tank (505) is connected to the liquid replenishment tank (601) via a liquid replenishment pipeline (602), and the liquid replenishment pipeline (602) is provided with an external liquid replenishment valve (603), a liquid replenishment drive device (604) and a liquid replenishment one-way valve (605).

3. The high reliability liquid cooling system according to claim 2, characterized in that: The pipe section between the main drive device (202) and the pressure relief valve (802) is connected to the pipe section between the external fluid replenishment valve (603) and the fluid replenishment drive device (604) via the post-pump fluid replenishment valve (606).

4. The high reliability liquid cooling system according to claim 3, characterized in that: The post-pump liquid storage tank (505) is also connected to a liquid discharge pipeline (701), and a liquid discharge valve (702) is provided on the liquid discharge pipeline (701).

5. The high reliability liquid cooling system according to claim 1, characterized in that: The liquid outlet of the pre-pump gas-liquid separator (501) is connected to the pipe section between the pre-pump liquid replenishing valve (506) and the pre-pump liquid storage tank (203).

6. A control method, applicable to the high-reliability liquid cooling system according to any one of claims 1 to 5, characterized in that: include: The pressure P21 at the outlet of the main drive device (202) is obtained, and when the pressure P21 meets a preset condition, the pressure relief valve (802) is opened.

7. The control method according to claim 6, characterized in that: The control method further comprises: When the temperature in the post-pump liquid storage tank (505) is too high, the pre-pump liquid replenishing valve (506) is opened to replenish liquid into the pre-pump liquid storage tank (203).

8. The control method according to claim 7, characterized in that: The post-pump liquid storage tank (505) is connected to the liquid replenishing tank (601) via a liquid replenishing pipeline (602), and the pipe section between the main drive device (202) and the pressure relief valve (802) is connected to the liquid replenishing pipeline (602) via a post-pump liquid replenishing valve (606): The control method further comprises: When the liquid level of the post-pump liquid storage tank (505) is too low, the liquid level state of the pre-pump liquid storage tank (203) is detected: If the liquid level of the pre-pump liquid storage tank (203) is too low, liquid is replenished to the post-pump liquid storage tank (505) through the liquid replenishment tank (601); Otherwise, the post-pump liquid replenishing valve (606) is opened to replenish liquid into the post-pump liquid storage tank (505).

Images