Negative pressure phase change type liquid cooling server and implementation method thereof

Abstract

The invention belongs to the technical field of negative pressure phase change type liquid cooling servers, and particularly relates to a negative pressure phase change type liquid cooling server and an implementation method thereof.The negative pressure phase change type liquid cooling server comprises a negative pressure heat dissipation cold plate, a negative pressure pipeline, a heat exchanger, a water inlet pipe and a water outlet pipe, a first negative pressure cavity is formed in the negative pressure heat dissipation cold plate, and liquid is subjected to phase change in the first negative pressure cavity; gas generated in the first negative pressure cavity flows into the heat exchanger through a negative pressure pipeline, is subjected to phase change in the second negative pressure cavity to generate liquid and then flows back to the first negative pressure cavity through the negative pressure pipeline, and the phase change liquid cooling working medium in the first negative pressure cavity circularly reciprocates to bring heat from the heat dissipation cold plate to the heat exchanger; a second negative pressure cavity and a water circulation cavity are formed in the heat exchanger, and heat released by phase change of a liquid cooling working medium in the second negative pressure cavity is conducted to the water circulation cavity to be taken away; low-temperature circulating water provided by the data center machine room enters the water circulating cavity of the heat exchanger from the water inlet pipe, water in the water circulating cavity flows back to the data center refrigerating device from the water outlet pipe, the circulating water does not enter the server in the liquid cooling process, the server is not damaged even if leakage occurs, and reliability is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of negative pressure phase change liquid cooling servers, and particularly relates to a negative pressure phase change liquid cooling server and an implementation method thereof. Background Art

[0002] Liquid cooling servers are currently divided into cold plate liquid cooling servers and immersion liquid cooling servers. Immersion liquid cooling servers are further divided into single-phase immersion liquid cooling servers and phase change immersion liquid cooling servers. The present invention overcomes the disadvantages of cold plate liquid cooling servers and phase change immersion liquid cooling servers, and is a brand-new liquid cooling server.

[0003] The cold plate liquid cooling server is a non-contact liquid cooling method. Its working principle is to place the server heating elements (such as high-heat-generating components like CPUs, GPUs, and memories) close to the liquid cooling plate (usually a closed cavity made of heat-conducting metals such as copper and aluminum). The coolant flows in the liquid cooling plate and the secondary-side circulation pipeline, taking away the heat of the heating elements, and the coolant does not directly contact the heat source. The coolant usually uses deionized water, ethylene glycol solution, propylene glycol solution, etc. Disadvantages of cold plate liquid cooling servers: 1. The coolant is conductive. Once leakage occurs, the server circuit board will be damaged. 2. The cold plate heat dissipation system needs to add a liquid leakage detection device and a valve. Once liquid leakage is detected, the valve is immediately closed to prevent the coolant from flowing into other servers and damaging other servers.

[0004] The phase change immersion liquid cooling server is a server that uses phase change immersion liquid cooling technology to efficiently dissipate heat through liquid phase change to improve the performance and stability of the server. Specifically, the phase change liquid cooling server usually completely immerses the main board, CPU, memory and other components with large heat generation of the server in the refrigerant. In the working state, these heating components generate heat, causing the refrigerant temperature to rise. When the refrigerant temperature rises to the boiling point corresponding to the system pressure, the refrigerant working medium will undergo a phase change, changing from a liquid state to a gaseous state, and realizing heat transfer by absorbing heat through the latent heat of vaporization.

[0005] However, the current phase change immersion liquid cooling servers have the following disadvantages:

[0006] 1. Since the coolant will undergo a phase change, the server housing needs to be completely sealed, which requires a dedicated room and personnel for server maintenance.

[0007] 2. The phase change immersion liquid cooling server requires a special cabinet, and the cost is much higher than that of the cold plate liquid cooling server.

[0008] Therefore, how to improve the existing phase change immersion liquid cooling server to achieve maintenance without a dedicated room and personnel, and at the same time reduce costs is a technical problem that urgently needs to be solved at present. Summary of the Invention

[0009] The object of the present invention is to provide a negative-pressure phase-change liquid-cooled server and its implementation method to solve the technical problems.

[0010] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0011] In the first aspect, a negative-pressure phase-change liquid-cooled server is provided, including a negative-pressure heat dissipation cold plate, a negative-pressure pipeline, a heat exchanger, a water inlet pipe, and a water outlet pipe. The negative-pressure heat dissipation cold plate is in contact with the heat source inside the liquid-cooled server, and a first negative-pressure chamber is arranged inside. The liquid undergoes a phase change in the first negative-pressure chamber. The gas generated in the first negative-pressure chamber of the negative-pressure heat dissipation cold plate flows to the heat exchanger through the negative-pressure pipeline, undergoes a phase change in the second negative-pressure chamber inside the heat exchanger, turns into a liquid, and then flows back to the first negative-pressure chamber of the negative-pressure heat dissipation cold plate through the negative-pressure pipeline. The phase-change liquid-cooling working medium in the first negative-pressure chamber uses the air pressure and gravity to circulate reciprocally to carry the heat from the heat dissipation cold plate to the heat exchanger;

[0012] Two chambers are arranged inside the heat exchanger. One of them is the second negative-pressure chamber for the phase change of the liquid-cooling working medium, and the other is a water circulation chamber. The second negative-pressure chamber and the water circulation chamber are completely isolated. The heat released by the phase change of the liquid-cooling working medium in the second negative-pressure chamber is conducted to the water circulation chamber, and the water flow inside the water circulation chamber takes away the heat;

[0013] The low-temperature circulating water provided by the data center computer room enters the water circulation chamber of the heat exchanger from the interface of the water inlet pipe, and the water in the water circulation chamber flows back to the data center refrigeration device from the interface of the water outlet pipe.

[0014] Preferably, two negative-pressure heat dissipation cold plates are provided. Both of the two negative-pressure heat dissipation cold plates are in contact with the heat source inside the liquid-cooled server, and the two negative-pressure heat dissipation cold plates are arranged separately and isolated by the heat source inside the liquid-cooled server. The negative-pressure heat dissipation cold plates and the heat source inside the liquid-cooled server are arranged alternately.

[0015] Preferably, the negative-pressure heat dissipation cold plate is a cuboid, and open concave parts are arranged at the four corner positions. Bolt holes are provided at the bottom of the concave parts, and bolts pass through the bolt holes to be connected with the bottom of the liquid-cooled server.

[0016] Preferably, the two negative-pressure heat dissipation cold plates are respectively connected to one end of the two negative-pressure pipelines, and the other ends of the two negative-pressure pipelines are respectively connected to the two chambers of the heat exchanger.

[0017] Preferably, the two chambers of the heat exchanger are respectively connected to the water inlet pipe and the water outlet pipe.

[0018] Preferably, the heat exchanger, the water inlet pipe, and the water outlet pipe are arranged outside the liquid-cooled server. The heat exchanger is installed at the tail of the housing of the liquid-cooled server and fixedly connected to the tail of the housing. The negative-pressure heat dissipation cold plate and the negative-pressure pipeline are both arranged inside the liquid-cooled server.

[0019] In a second aspect, an implementation method of a negative-pressure phase-change liquid-cooled server is provided, which is implemented based on the negative-pressure phase-change liquid-cooled server, and includes the following steps:

[0020] S1: Install the two negative-pressure heat dissipation cold plates at intervals at the heat source inside the liquid-cooled server. The heat exchanger is installed at the tail of the housing of the liquid-cooled server. The two chambers of the heat exchanger are respectively connected to the two negative-pressure heat dissipation cold plates through two negative-pressure pipelines.

[0021] S2: The two chambers of the heat exchanger are respectively connected to the data center computer room and the data center refrigeration device through the water inlet pipe and the water outlet pipe.

[0022] S3: The heat source inside the liquid-cooled server generates heat, causing the liquid in the first negative-pressure chamber to undergo a phase change to generate gas, and at the same time absorbing the heat generated by the heat source inside the liquid-cooled server.

[0023] S4: The gas generated by the phase change of the liquid in the first negative-pressure chamber flows to the heat exchanger through the negative-pressure pipeline, undergoes a phase change in the second negative-pressure chamber inside the heat exchanger, turns into a liquid, and then flows back to the first negative-pressure chamber of the negative-pressure heat dissipation cold plate through the negative-pressure pipeline. The phase-change liquid-cooling working medium in the first negative-pressure chamber uses the air pressure and gravity to circulate reciprocally to bring the heat from the negative-pressure heat dissipation cold plate to the heat exchanger.

[0024] S5: The heat released by the phase change of the liquid-cooling working medium in the second negative-pressure chamber is conducted to the water circulation chamber, and the water flow inside the water circulation chamber takes away the heat.

[0025] S6: The low-temperature circulating water provided by the data center computer room enters the water circulation chamber of the heat exchanger from the interface of the water inlet pipe, and the water in the water circulation chamber flows back to the data center refrigeration device from the interface of the water outlet pipe.

[0026] The beneficial effects of the present invention include:

[0027] The negative-pressure phase-change liquid-cooled server provided by the present invention and its implementation method include a negative-pressure heat dissipation cold plate, a negative-pressure pipeline, a heat exchanger, a water inlet pipe, and a water outlet pipe. A first negative-pressure chamber is arranged inside the negative-pressure heat dissipation cold plate, and a phase change occurs to the liquid in the first negative-pressure chamber, and the gas generated in the first negative-pressure chamber flows to the heat exchanger through the negative-pressure pipeline, and after a phase change occurs to generate a liquid in the second negative-pressure chamber, it flows back to the first negative-pressure chamber through the negative-pressure pipeline. The phase-change liquid-cooling working medium in the first negative-pressure chamber circulates reciprocally to carry heat from the heat dissipation cold plate to the heat exchanger; a second negative-pressure chamber and a water circulation chamber are arranged inside the heat exchanger, and the heat released by the phase change of the liquid-cooling working medium in the second negative-pressure chamber is conducted to the water circulation chamber to take away the heat; the low-temperature circulating water provided by the data center computer room enters the water circulation chamber of the heat exchanger through the water inlet pipe, and the water in the water circulation chamber flows back to the data center refrigeration device through the water outlet pipe. During the liquid-cooling process, the circulating water does not enter the server interior, and even if leakage occurs, the server will not be damaged, and the reliability is high.

[0028] First, the two negative-pressure heat dissipation cold plates are installed at intervals at the heat source inside the liquid-cooled server, the heat exchanger is installed at the tail of the shell of the liquid-cooled server, and the two chambers of the heat exchanger are respectively connected to the two negative-pressure heat dissipation cold plates through two negative-pressure pipelines. The two chambers of the heat exchanger are respectively connected to the data center computer room and the data center refrigeration device through the water inlet pipe and the water outlet pipe. There will be no situation where the server circuit board will be damaged once coolant leakage occurs like a traditional cold plate liquid-cooled server, and there is no leakage risk. Therefore, there is no need to add a liquid leakage detection device and a valve like a traditional cold plate liquid-cooled server, which can greatly reduce the server cost.

[0029] Second, since the phase-change working medium in the liquid-cooled server is completely sealed in the heat dissipation pipeline, there is no need to completely seal the server shell like a traditional phase-change immersion liquid-cooled server, and there is no need for a special room and personnel for server maintenance. Only an ordinary cold plate server cabinet can be used, and the cost is also much lower than that of a traditional phase-change immersion liquid-cooled server.

[0030] Finally, the heat generated by the heat source in the liquid-cooled server causes the liquid in the first negative pressure chamber to undergo a phase change to generate gas, while absorbing the heat generated by the heat source in the liquid-cooled server; the gas generated by the phase change of the liquid in the first negative pressure chamber flows through the negative pressure pipeline to the heat exchanger, where it undergoes a phase change in the second negative pressure chamber inside the heat exchanger, turns into liquid, and then flows back to the first negative pressure chamber of the negative pressure radiating cold plate through the negative pressure pipeline. The phase change liquid cooling working medium in the first negative pressure chamber uses the air pressure and gravity to circulate and transfer the heat from the negative pressure radiating cold plate to the heat exchanger; the heat released by the phase change of the liquid cooling working medium in the second negative pressure chamber is conducted to the water circulation chamber, and the water flow inside the water circulation chamber takes away the heat; the low-temperature circulating water provided by the data center computer room enters the water circulation chamber of the heat exchanger from the interface of the water inlet pipe, and the water in the water circulation chamber flows back from the interface of the water outlet pipe to the liquid cooling process of the data center refrigeration device without coolant leakage, improving the safety of the liquid-cooled server and reducing the server equipment cost and maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the composition structure of the negative pressure phase change type liquid-cooled server of the present invention.

[0032] Figure 2 It is a schematic diagram of the composition structure of the negative pressure phase change liquid cooling and heat dissipation device in the liquid-cooled server of the present invention.

[0033] Figure 3 It is a schematic flow diagram of the implementation method of the negative pressure phase change type liquid-cooled server of the present invention.

[0034] Reference numerals: 1 negative pressure radiating cold plate, 2 negative pressure pipeline, 3 heat exchanger, 4 water inlet pipe, 5 water outlet pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The following further describes the present invention in detail with reference to the attached Figures 1 to 3 drawings:

[0036] Embodiment 1

[0037] Referring to the attached Figure 1 drawings and the attached Figure 2 drawings, a negative pressure phase change type liquid-cooled server includes a negative pressure radiating cold plate 1, a negative pressure pipeline 2, a heat exchanger 3, a water inlet pipe 4 and a water outlet pipe 5. The negative pressure radiating cold plate 1 is in contact with the heat source in the liquid-cooled server, and a first negative pressure chamber is provided inside. The liquid undergoes a phase change in the first negative pressure chamber. The gas generated in the first negative pressure chamber of the negative pressure radiating cold plate 1 flows through the negative pressure pipeline 2 to the heat exchanger 3, where it undergoes a phase change in the second negative pressure chamber inside the heat exchanger 3, turns into liquid, and then flows back to the first negative pressure chamber of the negative pressure radiating cold plate 1 through the negative pressure pipeline 2. The phase change liquid cooling working medium in the first negative pressure chamber uses the air pressure and gravity to circulate and transfer the heat from the radiating cold plate to the heat exchanger 3.

[0038] The heat exchanger 3 is internally provided with two chambers, one of which is a second negative pressure chamber for the phase change of the liquid cooling working medium, and the other is a water circulation chamber. The second negative pressure chamber and the water circulation chamber are completely isolated. The heat released by the phase change of the liquid cooling working medium in the second negative pressure chamber is conducted to the water circulation chamber, and the water flow inside the water circulation chamber takes away the heat. The low-temperature circulating water provided by the data center computer room enters the water circulation chamber of the heat exchanger 3 from the interface of the water inlet pipe 4, and the water in the water circulation chamber flows back to the data center refrigeration device from the interface of the water outlet pipe 5.

[0039] Since the traditional plate liquid cooling server is non-contact liquid cooling, by bringing the server heating elements (such as high-heat-generating components like CPU, GPU, memory, etc.) close to the liquid cooling plate (usually a closed cavity composed of heat-conducting metals such as copper and aluminum), the cooling liquid flows in the liquid cooling plate and the secondary-side circulation pipeline to take away the heat of the heating elements, and the cooling liquid does not directly contact the heat source. The cooling liquid mostly uses deionized water, ethylene glycol solution, propylene glycol solution, etc. Since the cooling liquid has electrical conductivity, once leakage occurs, the server circuit board will be damaged. The cold plate heat dissipation system needs to add a liquid leakage detection device and a valve, with high costs. Once liquid leakage is detected, the valve is immediately closed to prevent the cooling liquid from flowing into other servers and damaging other servers.

[0040] However, the negative pressure phase change type liquid cooling server of the present invention will not cause the server circuit board to be damaged due to the leakage of the cooling liquid like the traditional cold plate liquid cooling server. Since there is no leakage risk, there is no need to add a liquid leakage detection device and a valve like the traditional cold plate liquid cooling server, resulting in lower costs. And since the phase change working medium is completely sealed in the heat dissipation pipeline, there is no need to completely seal the server shell like the traditional phase change immersion liquid cooling server, which is convenient for maintenance. It can be used with an ordinary cold plate server cabinet, and the cost is much lower than that of the traditional phase change immersion liquid cooling server.

[0041] On the basis of Embodiment 1, there are two negative pressure heat dissipation cold plates 1. Both of the two negative pressure heat dissipation cold plates 1 are in contact with the heat sources inside the liquid cooling server, and the two negative pressure heat dissipation cold plates 1 are arranged in isolation, isolated by the heat sources inside the liquid cooling server, and the negative pressure heat dissipation cold plates 1 and the heat sources inside the liquid cooling server are arranged alternately. The negative pressure heat dissipation cold plate 1 is a cuboid, and open recesses are provided at the four corner positions. Bolt holes are provided at the bottom of the recesses, and bolts pass through the bolt holes to be connected to the bottom of the liquid cooling server. The two negative pressure heat dissipation cold plates 1 are respectively connected to one ends of the two negative pressure pipelines 2, and the other ends of the two negative pressure pipelines 2 are respectively connected to the two chambers of the heat exchanger 3.

[0042] The two chambers of the heat exchanger 3 are respectively connected to the water inlet pipe 4 and the water outlet pipe 5. The heat exchanger 3, the water inlet pipe 4, and the water outlet pipe 5 are arranged outside the liquid-cooled server. The heat exchanger 3 is installed at the tail of the liquid-cooled server housing and fixedly connected to the tail of the housing. The negative pressure heat dissipation cold plate 1 and the negative pressure pipeline 2 are both arranged inside the liquid-cooled server.

[0043] Embodiment 3

[0044] Based on Embodiment 1 or Embodiment 2, refer to the attached Figure 3 As shown, a method for realizing a negative pressure phase change type liquid-cooled server is based on the negative pressure phase change type liquid-cooled server and includes the following steps:

[0045] S1: Install the two negative pressure heat dissipation cold plates 1 at intervals at the heat source inside the liquid-cooled server. The heat exchanger 3 is installed at the tail of the liquid-cooled server housing. The two chambers of the heat exchanger 3 are respectively connected to the two negative pressure heat dissipation cold plates 1 through two negative pressure pipelines 2.

[0046] S2: The two chambers of the heat exchanger 3 are respectively connected to the data center computer room and the data center refrigeration device through the water inlet pipe 4 and the water outlet pipe 5.

[0047] S3: The heat source inside the liquid-cooled server generates heat, causing the liquid in the first negative pressure chamber to undergo a phase change to generate gas, and at the same time absorbing the heat generated by the heat source inside the liquid-cooled server.

[0048] S4: The gas generated by the phase change of the liquid in the first negative pressure chamber flows to the heat exchanger 3 through the negative pressure pipeline 2, undergoes a phase change inside the second negative pressure chamber of the heat exchanger 3, turns into a liquid, and then flows back to the first negative pressure chamber of the negative pressure heat dissipation cold plate 1 through the negative pressure pipeline 2. The phase change liquid cooling working medium in the first negative pressure chamber uses the air pressure and gravity to move in a cycle, taking the heat from the negative pressure heat dissipation cold plate 1 to the heat exchanger 3.

[0049] S5: The heat released by the phase change of the liquid cooling working medium in the second negative pressure chamber is conducted to the water circulation chamber, and the water flow inside the water circulation chamber takes away the heat.

[0050] S6: The low-temperature circulating water provided by the data center computer room enters the water circulation chamber of the heat exchanger 3 from the interface of the water inlet pipe 4, and the water in the water circulation chamber flows back to the data center refrigeration device from the interface of the water outlet pipe 5.

[0051] In this embodiment, the heat source inside the liquid-cooled server generates heat, causing the liquid in the first negative pressure chamber to undergo a phase change to produce gas, while absorbing the heat generated by the heat source inside the liquid-cooled server. The gas generated by the phase change of the liquid in the first negative pressure chamber flows through the negative pressure pipeline 2 to the heat exchanger 3, where it undergoes a phase change inside the second negative pressure chamber of the heat exchanger 3 and turns into liquid, and then flows back to the first negative pressure chamber of the negative pressure radiating cold plate 1 through the negative pressure pipeline 2. The phase change liquid-cooling working medium in the first negative pressure chamber uses the air pressure and gravity to move in a cycle, transferring the heat from the negative pressure radiating cold plate 1 to the heat exchanger 3. The heat released by the phase change of the liquid-cooling working medium in the second negative pressure chamber is conducted to the water circulation chamber, and the water flow inside the water circulation chamber takes away the heat. The low-temperature circulating water provided by the data center computer room enters the water circulation chamber of the heat exchanger 3 from the interface of the water inlet pipe 4, and the water in the water circulation chamber flows back from the interface of the water outlet pipe 5 to the data center refrigeration device. The liquid-cooling process will not result in coolant leakage, improving the safety of the liquid-cooled server, and at the same time reducing the server equipment cost and maintenance cost.

[0052] In summary, the negative pressure phase change type liquid-cooled server and its implementation method provided by the present invention include a negative pressure radiating cold plate 1, a negative pressure pipeline 2, a heat exchanger 3, a water inlet pipe 4, and a water outlet pipe 5. A first negative pressure chamber is arranged inside the negative pressure radiating cold plate 1, and the liquid undergoes a phase change in the first negative pressure chamber. The gas generated in the first negative pressure chamber flows through the negative pressure pipeline 2 to the heat exchanger 3, where it undergoes a phase change to generate liquid in the second negative pressure chamber and then flows back to the first negative pressure chamber through the negative pressure pipeline 2. The phase change liquid-cooling working medium in the first negative pressure chamber moves in a cycle to transfer the heat from the radiating cold plate to the heat exchanger 3. The second negative pressure chamber and the water circulation chamber are arranged inside the heat exchanger 3, and the heat released by the phase change of the liquid-cooling working medium in the second negative pressure chamber is conducted to the water circulation chamber to take away the heat. The low-temperature circulating water provided by the data center computer room enters the water circulation chamber of the heat exchanger 3 from the water inlet pipe 4, and the water in the water circulation chamber flows back to the data center refrigeration device from the water outlet pipe 5. The circulating water does not enter the server during the liquid-cooling process. Even if there is a leak, the server will not be damaged, and the reliability is high.

[0053] Install two pieces of the negative pressure cooling plates 1 at intervals at the heat source in the liquid-cooled server. Install the heat exchanger 3 at the tail of the housing of the liquid-cooled server. Two chambers of the heat exchanger 3 are respectively connected to the two pieces of the negative pressure cooling plates 1 through two negative pressure pipelines 2. Two chambers of the heat exchanger 3 are respectively connected to the data center computer room and the data center refrigeration device through the water inlet pipe 4 and the water outlet pipe 5. There will be no situation where the server circuit board will be damaged once the coolant leaks like in a traditional cold plate liquid-cooled server, and there is no leakage risk. Therefore, there is no need to add a liquid leakage detection device and a valve like in a traditional cold plate liquid-cooled server, which can greatly reduce the server cost. Since the phase change working fluid in the liquid-cooled server is completely sealed in the heat dissipation pipeline, there is no need to completely seal the server housing like in a traditional phase change immersion liquid-cooled server, and there is no need for a special room and personnel to maintain the server. Only an ordinary cold plate server cabinet can be used, and the cost is also much lower than that of a traditional phase change immersion liquid-cooled server.

[0054] The heat generated by the heat source in the liquid-cooled server causes the liquid in the first negative pressure chamber to undergo a phase change to generate gas, and at the same time absorbs the heat generated by the heat source in the liquid-cooled server. The gas generated by the phase change of the liquid in the first negative pressure chamber flows through the negative pressure pipeline 2 to the heat exchanger 3, where a phase change occurs in the second negative pressure chamber inside the heat exchanger 3 and turns into liquid, and then flows back to the first negative pressure chamber of the negative pressure cooling plate 1 through the negative pressure pipeline 2. The phase change liquid-cooled working fluid in the first negative pressure chamber uses the air pressure and gravity to circulate reciprocally to bring the heat from the negative pressure cooling plate 1 to the heat exchanger 3. The heat released by the phase change of the liquid-cooled working fluid in the second negative pressure chamber is conducted to the water circulation chamber, and the water flow inside the water circulation chamber takes away the heat. The low-temperature circulating water provided by the data center computer room enters the water circulation chamber of the heat exchanger 3 from the interface of the water inlet pipe 4, and the water in the water circulation chamber flows back to the data center refrigeration device from the interface of the water outlet pipe 5. The liquid-cooling process will not have coolant leakage, improving the safety of the liquid-cooled server and reducing the server equipment cost and maintenance cost.

Claims

1. A negative pressure phase change liquid cooling server, characterized in that: It comprises a negative pressure heat dissipation cold plate (1), a negative pressure pipeline (2), a heat exchanger (3), a water inlet pipe (4) and a water outlet pipe (5); the negative pressure heat dissipation cold plate (1) contacts the heat source in the liquid cooling server, and a first negative pressure chamber is arranged inside. Liquid undergoes phase change in the first negative pressure chamber. The gas generated in the first negative pressure chamber of the negative pressure heat dissipation cold plate (1) flows to the heat exchanger (3) through the negative pressure pipeline (2), undergoes phase change in the second negative pressure chamber inside the heat exchanger (3), becomes liquid, and then flows back to the first negative pressure chamber of the negative pressure heat dissipation cold plate (1) through the negative pressure pipeline (2). The phase change liquid cooling medium in the first negative pressure chamber uses the action of air pressure and gravity to carry heat from the heat dissipation cold plate to the heat exchanger (3) through a cyclic reciprocating motion; The heat exchanger (3) is provided with two chambers, one of which is a second negative pressure chamber for phase change of liquid cooling medium, and the other is a water circulation chamber, the second negative pressure chamber and the water circulation chamber are completely isolated, the heat released by the phase change of liquid cooling medium in the second negative pressure chamber is transferred to the water circulation chamber, and the water flow in the water circulation chamber takes away the heat; Low-temperature circulating water provided by the data center machine room enters the water circulation chamber of the heat exchanger (3) from the interface of the water inlet pipe (4), and the water in the water circulation chamber flows back to the data center refrigeration device from the interface of the water outlet pipe (5).

2. A negative pressure phase change liquid cooling server according to claim 1, characterized in that: The negative pressure heat dissipation cold plates (1) are provided with two pieces, and both of the negative pressure heat dissipation cold plates (1) are in contact with the heat source in the liquid cooling server, and the two negative pressure heat dissipation cold plates (1) are arranged in isolation, and are isolated by the heat source in the liquid cooling server, and the negative pressure heat dissipation cold plates (1) and the heat source in the liquid cooling server are arranged alternately.

3. A negative pressure phase change liquid cooling server according to claim 2, characterized in that: The negative pressure heat dissipation cold plate (1) is a rectangular parallelepiped, and has open recesses at the four corners. Bolt holes are provided at the bottom of the recesses, and bolts pass through the bolt holes to connect with the bottom of the liquid cooling server.

4. The negative pressure phase change liquid cooling server according to claim 3, characterized in that: The two negative pressure heat dissipation cold plates (1) are respectively connected to one end of the two negative pressure pipelines (2), and the other ends of the two negative pressure pipelines (2) are respectively connected to the two chambers of the heat exchanger (3).

5. The negative pressure phase change liquid cooling server according to claim 4, characterized in that: The two chambers of the heat exchanger (3) are respectively connected to a water inlet pipe (4) and a water outlet pipe (5).

6. The negative pressure phase change liquid cooling server according to claim 1, characterized in that: The heat exchanger (3), the water inlet pipe (4) and the water outlet pipe (5) are arranged outside the liquid cooling server, the heat exchanger (3) is installed at the rear of the shell of the liquid cooling server and is fixedly connected to the rear of the shell, and the negative pressure heat dissipation cold plate (1) and the negative pressure pipeline (2) are both arranged inside the liquid cooling server.

7. A method for implementing a negative pressure phase change liquid cooling server, characterized in that: The following steps are involved: S1: two negative pressure heat dissipation cold plates (1) are installed at intervals at the heat source in the liquid cooling server, the heat exchanger (3) is installed at the rear of the shell of the liquid cooling server, and the two chambers of the heat exchanger (3) are respectively connected to the two negative pressure heat dissipation cold plates (1) through two negative pressure pipelines (2); S2: The two chambers of the heat exchanger (3) are connected to the data center computer room and the data center refrigeration device through the water inlet pipe (4) and the water outlet pipe (5) respectively; S3: The heat source in the liquid cooling server generates heat, causing the liquid in the first negative pressure chamber to undergo a phase change to generate gas, while absorbing the heat generated by the heat source in the liquid cooling server; S4: The liquid in the first negative pressure chamber undergoes a phase change to generate gas, which flows through the negative pressure pipeline (2) to the heat exchanger (3), undergoes a phase change in the second negative pressure chamber inside the heat exchanger (3), becomes liquid, and then flows back to the first negative pressure chamber of the negative pressure heat dissipation cold plate (1) through the negative pressure pipeline (2). The phase change liquid cooling medium in the first negative pressure chamber utilizes the effects of air pressure and gravity to circulate and reciprocate to bring heat from the negative pressure heat dissipation cold plate (1) to the heat exchanger (3); S5: The heat released by the phase change of the liquid-cooling medium in the second negative pressure chamber is transferred to the water circulation chamber, and the water flow in the water circulation chamber takes away the heat; S6: Low-temperature circulating water provided by the data center computer room enters the water circulation chamber of the heat exchanger (3) from the interface of the water inlet pipe (4), and the water in the water circulation chamber flows back to the data center refrigeration device from the interface of the water outlet pipe (5).

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