Liquid cooling server cabinet

Abstract

The invention relates to the field of liquid cooling servers, and particularly discloses a liquid cooling server cabinet which is characterized by comprising a water cooling box and a server cabinet, the server cabinet is partially inserted into the water cooling box, and the server cabinet is filled with cooling liquid. And the pressure of the cooling liquid in the water cooling box is greater than that of water in the water cooling box so as to ensure that the cooling liquid can only flow into the water cooling box unidirectionally when the server cabinet leaks. According to the scheme, the server cabinet and the water cooling box are combined, the server is immersed in the cooling liquid of the server cabinet, most of the server cabinet is immersed in the water cooling box, heat of the server is transmitted to the cooling liquid, the cooling liquid transmits the heat to water in the water cooling box through the side wall of the server cabinet, and the water cooling box generally needs to be connected with an external water source; by controlling the pressure of the cooling liquid to be greater than the water pressure in the water cooling box, when the server cabinet leaks, the cooling liquid flows into the water cooling box, and the water in the water cooling box does not flow into the server cabinet, so that the safety of the server is ensured.

Description

Technical Field

[0001] The present application relates to the field of liquid cooling servers, and in particular to a liquid cooling server cabinet. Background Art

[0002] Liquid cooling server cabinet is a device that uses liquid cooling technology to dissipate heat from the server. The following is a detailed introduction about it: Liquid cooling technology uses the high thermal conductivity of liquid to transport the liquid from the condenser to various devices in the server cabinet through a pump, absorbing the heat generated by the equipment, and then flowing back to the condenser for cooling, repeating this cycle to achieve an efficient cooling effect.

[0003] The liquid supply system is responsible for providing cooling liquid, which is generally a mixture of deionized water and ethylene glycol, fluorinated liquid, etc.; the liquid circulation system consists of pumps, pipes and heat exchangers, which brings the heat absorbed by the liquid from the server cabinet back to the cooling system for cooling; the cooling system is mainly composed of a cooling tower, a chilled water system and a heat dissipation system, which is responsible for transferring the heat in the liquid to the external environment.

[0004] Immersed liquid cooling server cabinet: The server is completely immersed in the coolant, and the heat of all heating components is directly transferred to the coolant, and then the heat is dissipated through the circulation of the coolant or the evaporation and condensation phase change. Among them, the circulation of the coolant is single-phase immersion liquid cooling, and the evaporation and condensation phase change of the coolant is phase change immersion liquid cooling.

[0005] When the coolant leaks in the immersion liquid cooling server cabinet, the coolant will directly contact the electronic components of the server. If the coolant is conductive, it will cause a short circuit and damage the server's mainboard, CPU, memory and other key hardware components. For example, some traditional coolants may contain ionic components. Once leaked, it is like building a "conductive bridge" between electronic components. The instantaneous short circuit may burn the chip and make the server unable to work properly. Therefore, the existing coolant generally uses fluorinated liquid.

[0006] However, after the fluorinated liquid absorbs heat, it needs to be cooled down through an additional cooling medium, and water cooling is generally used. If the server cabinet is damaged during water cooling, water will enter the fluorinated liquid and eventually come into contact with the electronic components, easily causing problems such as server short circuits. Summary of the invention

[0007] In order to improve the problem of server safety, the present application provides a liquid-cooled server cabinet.

[0008] The liquid cooling server cabinet provided in this application adopts the following technical solution: A liquid-cooled server cabinet, characterized in that it includes a water cooling box and a server cabinet, wherein the server cabinet is partially inserted into the water cooling box, the server cabinet is filled with coolant, and the coolant pressure in the water cooling box is greater than the pressure of the water in the water cooling box to ensure that when a leak occurs in the server cabinet, the coolant can only flow unidirectionally into the water cooling box.

[0009] By adopting the above technical solution, this solution combines the server cabinet and the water cooling box, and the server is immersed in the coolant of the server cabinet. Most of the server cabinet is immersed in the water cooling box. The heat of the server is transferred to the coolant, and the coolant transfers the heat to the water in the water cooling box through the side wall of the server cabinet. The water cooling box generally requires an external water source so that the water in the water cooling box is constantly replaced. By controlling the coolant pressure to be greater than the water pressure in the water cooling box, when the server cabinet leaks, the coolant will flow into the water cooling box, and the water in the water cooling box will not flow into the server cabinet, thereby ensuring the safety of the server. The coolant in the server cabinet is generally a fluorinated liquid, and can also be mineral oil, silicone liquid, dibutyl phosphate and other liquids that do not have conductive properties but have good thermal conductivity.

[0010] Optionally, a first liquid level sensor is provided in the server cabinet, and the water cooling box has a water inlet and a water outlet, and solenoid valves are installed at the water inlet and the water outlet. When the first liquid level sensor is lower than a set value, the solenoid valve of the water inlet is closed and the solenoid valve of the water outlet is opened.

[0011] By adopting the above technical solution, the set value here is that when the liquid level is at the set value, the coolant pressure is close to the water pressure, but the coolant pressure is still maintained to be greater than the water pressure, for example, when the coolant pressure - water pressure = 1kpa is set; the solenoid valve is used to control the water cooling box to only output but not input, thereby reducing the water pressure to ensure that the water pressure is always lower than the coolant pressure, and the water discharge is stopped at least when the water level height is lower than the bottom of the server cabinet.

[0012] Optionally, a stirring member is provided in the server cabinet, and the stirring member drives the cooling liquid to flow.

[0013] By adopting the above technical solution, the stirring member can drive the coolant to flow, thereby avoiding local heat accumulation.

[0014] Optionally, the stirring member includes a circulation pump, a magnetic water pump, or a water turbine.

[0015] By adopting the above technical solution, stirring can be achieved in the above methods.

[0016] Optionally, a first liquid level sensor is provided in the server cabinet, and the server cabinet is connected to a liquid replenishing system, and when the first liquid level is lower than a set value, the liquid replenishing system replenishes coolant.

[0017] By adopting the above technical solution, the method of supplementing the coolant can ensure that the pressure of the coolant is always greater than the water pressure.

[0018] Optionally, the server cabinet has a circulation channel, and the circulation channel is isolated from the interior of the server cabinet.

[0019] By adopting the above technical solution, since the chip part of the server is the main heat source, the flow channel is opened near the main heat source to increase the heat exchange area. Water can flow through the flow channel, but the coolant will not enter the circulation channel.

[0020] Optionally, the top of the water cooling box has an opening, the server cabinet has an annular limiting portion, and after a portion of the server cabinet is inserted into the opening, the annular limiting portion abuts against the top upper surface of the water cooling box.

[0021] By adopting the above technical solution and the above method, the server cabinet can be easily and quickly installed in the water cooling box.

[0022] Optionally, the top upper surface of the water cooling box is concave to form an annular groove, a sealing ring is placed in the annular groove, and the annular limiting portion presses the sealing ring.

[0023] By adopting the above technical solution, water leakage from the connection between the server cabinet and the water cooling box is prevented by means of a sealing ring.

[0024] Optionally, an annular connecting ring is formed outside the opening, a plurality of annular cutting grooves are formed on the outer wall of the annular connecting ring, and the annular connecting ring is welded and sealed with the annular limiting portion.

[0025] This method uses welding sealing, and generally there is no need to worry about water leakage. However, if a leak occurs, the server cabinet can be disassembled by cutting the annular cutting groove with a cutting machine, and then a new server cabinet can be welded.

[0026] Optionally, a second liquid level sensor is provided in the water cooling box, and the server cabinet is connected to a coolant discharge system. When the water level is lower than the lowest value of the server cabinet, the coolant discharge system is started.

[0027] When it is ensured that water will not enter the server cabinet and a leak is detected in the server cabinet, the coolant in the server cabinet is directly drained and collected.

[0028] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting the liquid level difference, the coolant pressure is greater than the water pressure to ensure that water does not enter the server cabinet; 2. In the above scheme, the material of the external pipes (water inlet pipe and water outlet pipe, etc.) of the water cooling box is not limited; 3. The liquid cooling server cabinet can be used in combination, and the water outlets and water inlets of two adjacent liquid cooling server cabinets are connected; 4. Use a combination of internal immersion and external immersion to achieve server cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application; Figure 2 This is a schematic diagram of the structure of Example 2 of the present application. Figure 1 , external tap water; Figure 3 This is a schematic diagram of the structure of Example 2 of the present application. Figure 2 , water circulation system; Figure 4 is a schematic diagram of the structure of Example 3 of the present application; Figure 5 It is a schematic diagram of the structure of the embodiment of the present application, and embodiments 4-6 can be used as a reference; Figure 6 is a structural diagram of a server cabinet according to an embodiment of the present application; Figure 7 This is a schematic diagram of the water cooling box opening.

[0030] Figure numerals: 1. water cooling box; 2. server cabinet; 3. circulating water pipe; 4. circulating water pump; 5. water cooling tower; 6. first liquid level sensor; 7. solenoid valve; 8. three-way solenoid valve; 9. stirring member; 10. liquid replenishing tank; 11. liquid replenishing pump; 12. second liquid level sensor; 13. circulation channel; 14. annular limit portion; 15. opening; 16. annular connecting ring; 17. annular cutting groove. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-7 This application is described in further detail.

[0032] Embodiment 1: A liquid-cooled server cabinet comprises a water cooling box 1 and a server cabinet 2. The server cabinet 2 is partially inserted into the water cooling box 1. Generally, most of the server cabinet 2 is located in the water cooling box 1, preferably 75% to 80% of the volume is located in the water cooling box 1, and a small part is higher than the water cooling box 1. The server cabinet 2 is filled with coolant, which is generally a fluorinated liquid, and can also be a liquid such as mineral oil, silicone liquid, dibutyl phosphate, etc. that does not have conductive properties but has good thermal conductivity. The coolant pressure in the water cooling box 1 is greater than the pressure of the water in the water cooling box 1 to ensure that when a leak occurs in the server cabinet 2, only the coolant can flow unidirectionally into the water cooling box 1. The above purpose is mainly achieved through the liquid level difference, so a small part of the server cabinet 2 needs to be higher than the water cooling box 1. The water cooling box 1 generally has a water inlet and a water outlet. The water inlet can be connected to tap water through a water pipe, and the water outlet is directly connected to the water pipe for external discharge, and cold water is always replenished through tap water. A water circulation system can also be connected. For example, the water circulation system includes a circulating water pipe 3, a circulating water pump 4 and a water cooling tower 5. The circulating water pipe 3 connects the water inlet and the water outlet. After the circulating water pipe 3 passes through the water cooling tower 5, the circulating water pump is installed on the circulating water pipe 3.

[0033] Embodiment 2: A liquid-cooled server cabinet comprises a water cooling box 1 and a server cabinet 2. The server cabinet 2 is partially inserted into the water cooling box 1. Generally, most of the server cabinet 2 is located in the water cooling box 1, preferably 75% to 80% of the volume is located in the water cooling box 1, and a small part is higher than the water cooling box 1. The server cabinet 2 is filled with coolant, and the coolant is generally a fluorinated liquid. The coolant pressure in the water cooling box 1 is greater than the pressure of the water in the water cooling box 1 to ensure that when a leak occurs in the server cabinet 2, only the coolant can flow unidirectionally into the water cooling box 1. The above purpose is mainly achieved through the liquid level difference, so a small part of the server cabinet 2 needs to be higher than the water cooling box 1. The water cooling box 1 generally has a water inlet and a water outlet. The water inlet can be connected to tap water through a water pipe, and the water outlet is directly connected to the water pipe to discharge outside, and cold water is always replenished by tap water. A water circulation system can also be connected. For example, the water circulation system includes a circulating water pipe 3, a circulating water pump 4 and a water cooling tower 5. The circulating water pipe 3 connects the water inlet and the water outlet. After the circulating water pipe 3 passes through the water cooling tower 5, the circulating water pump 4 is installed on the circulating water pipe 3.

[0034] A first liquid level sensor 6 is provided in the server cabinet 2, and the water cooling box 1 has a water inlet and a water outlet, and electromagnetic valves 7 are installed at the water inlet and the water outlet. When the first liquid level sensor 6 is lower than the set value, the electromagnetic valve 7 of the water inlet is closed, and the electromagnetic valve 7 of the water outlet is opened. By adopting the above technical solution, the set value here is that when the liquid level is at the set value, the coolant pressure is close to the water pressure, but the coolant pressure is still maintained to be greater than the water pressure, for example, when the coolant pressure-water pressure=1kpa; the water cooling box 1 is controlled by the electromagnetic valve 7 to only discharge but not inlet, thereby reducing the water pressure, to ensure that the water pressure is always lower than the coolant pressure, and at least when the water level height is lower than the bottom of the server cabinet 2, the water discharge is stopped.

[0035] When the water circulation system is connected, the solenoid valve 7 at the water outlet needs to be provided with a three-way solenoid valve 87, one for circulation and the other for draining.

[0036] Embodiment 3: Based on Embodiments 1 and 2, a stirring member 9 can be provided. The stirring member 9 is located in the server cabinet 2. The stirring member 9 drives the coolant to flow. The stirring member 9 can drive the coolant to flow to avoid local heat accumulation. The stirring member 9 includes a circulating pump or a magnetic water pump or a water turbine. This embodiment can be a circulating pump.

[0037] Embodiment 4: A liquid-cooled server cabinet comprises a water cooling box 1 and a server cabinet 2. The server cabinet 2 is partially inserted into the water cooling box 1. Generally, most of the server cabinet 2 is located in the water cooling box 1, preferably 75% to 80% of the volume is located in the water cooling box 1, and a small part is higher than the water cooling box 1. The server cabinet 2 is filled with coolant, which is generally a fluorinated liquid. The coolant pressure in the water cooling box 1 is greater than the pressure of the water in the water cooling box 1 to ensure that when a leak occurs in the server cabinet 2, only the coolant can flow unidirectionally into the water cooling box 1. The above purpose is mainly achieved through the liquid level difference, so a small part of the server cabinet 2 needs to be higher than the water cooling box 1. The water cooling box 1 generally has a water inlet and a water outlet. The water inlet can be connected to tap water through a water pipe, or it can be connected to a water circulation system. For example, the water coming out of the water outlet passes through a water cooling tower 5 and then enters the water inlet. A first liquid level sensor 6 is provided in the server cabinet 2, and the server cabinet 2 is connected to a liquid replenishing system. When the first liquid level is lower than the set value, the liquid replenishing system replenishes the coolant. The refilling system may include a refilling tank 10 and a refilling pump 11. The outlet of the refilling tank 10 is connected to the inlet of the refilling pump 11 through a refilling pipe, and the outlet of the refilling pump 11 is connected to the server cabinet 2 through the refilling pipe. By adopting the above technical solution, the method of replenishing coolant can ensure that the pressure of the coolant is always greater than the water pressure.

[0038] Embodiment 5: Based on Embodiment 2, a liquid replenishing system may also be added, and when the first liquid level is lower than the set value, the liquid replenishing system replenishes the coolant. The liquid replenishing system may include a liquid replenishing tank 10 and a liquid replenishing pump 11. The outlet of the liquid replenishing tank 10 is connected to the inlet of the liquid replenishing pump 11 through a liquid replenishing pipe, and the outlet of the liquid replenishing pump 11 is connected to the server cabinet 2 through the liquid replenishing pipe. By adopting the above technical solution, the method of replenishing the coolant can ensure that the pressure of the coolant is always greater than the water pressure.

[0039] Embodiment 6: A liquid-cooled server cabinet, based on any one of Embodiments 2-5, a second liquid level sensor 12 is provided in the water cooling box 1, and the server cabinet 2 is connected to the coolant discharge system. When the water level is lower than the lowest value of the server cabinet 2, the coolant discharge system is started. The discharge system here can be provided with a separate discharge pump and a collection box, and the coolant in the damaged server cabinet 2 is pumped into the collection box, and then pumped again after the new server cabinet 2 is installed. In this example, the discharge system can share a set with the rehydration system, and the rehydration pump 11 of the rehydration system is controlled to replenish or extract, and the rehydration tube is inserted to the server cabinet 2 near the bottom.

[0040] The content of Example 3 can also be added to Examples 4-6.

[0041] In all the above embodiments, the server cabinet 2 has a circulation channel 13, and the circulation channel 13 is isolated from the inside of the server cabinet 2. Since the chip part of the server is the main heat source, the flow channel is opened near the main heat source to increase the heat exchange area. Water can flow through the flow channel, but the coolant will not enter the circulation channel 13. There are two ways to connect the server cabinet 2 to the water cooling box 1, one is welding, and the other is bolt connection. The top of the water cooling box 1 has an opening 15, and the server cabinet 2 has an annular limiting portion 14. After a part of the server cabinet 2 is inserted into the opening 15, the annular limiting portion 14 abuts against the top upper surface of the water cooling box 1, and the annular limiting portion 14 is welded to the top of the water cooling box 1. The welding method preferably forms an annular connecting ring 16 outside the opening 15, and the outer wall of the annular connecting ring 16 is provided with a plurality of annular cutting grooves 17, and the annular connecting ring 16 is welded and sealed with the annular limiting portion 14.

[0042] Another way is to form an annular groove on the top upper surface of the water cooling box 1, place a sealing ring in the annular groove, press the sealing ring with the annular limiting part 14, and the bolts pass through the annular limiting part 14 to connect with the water cooling box 1.

[0043] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A liquid-cooled server cabinet, characterized in that: It includes a water cooling box and a server cabinet. The server cabinet is partially inserted into the water cooling box. The server cabinet is filled with coolant. The coolant pressure in the water cooling box is greater than the pressure of water in the water cooling box to ensure that when the server cabinet leaks, the coolant can only flow unidirectionally into the water cooling box.

2. A liquid-cooled server cabinet according to claim 1, characterized in that: A first liquid level sensor is arranged in the server cabinet, and the water cooling box has a water inlet and a water outlet. Solenoid valves are installed at the water inlet and the water outlet. When the first liquid level sensor is lower than a set value, the solenoid valve of the water inlet is closed and the solenoid valve of the water outlet is opened.

3. The liquid-cooled server cabinet according to claim 1, characterized in that: The server cabinet is provided with a stirring member, and the stirring member drives the cooling liquid to flow.

4. A liquid-cooled server cabinet according to claim 3, characterized in that: The stirring member includes a circulating pump, a magnetic water pump or a water turbine.

5. The liquid-cooled server cabinet according to claim 1, characterized in that: A first liquid level sensor is arranged in the server cabinet, and the server cabinet is connected to a liquid replenishing system. When the first liquid level is lower than a set value, the liquid replenishing system replenishes coolant.

6. The liquid-cooled server cabinet according to claim 1, characterized in that: The server cabinet has a circulation channel, and the circulation channel is isolated from the interior of the server cabinet.

7. The liquid-cooled server cabinet according to claim 1, characterized in that: The top of the water cooling box is provided with an opening, and the server cabinet is provided with an annular limiting portion. After a part of the server cabinet is inserted into the opening, the annular limiting portion abuts against the top upper surface of the water cooling box.

8. The liquid cooling server cabinet according to claim 7, characterized in that: The top upper surface of the water cooling box is concave to form an annular groove, a sealing ring is placed in the annular groove, and the annular limiting portion presses the sealing ring.

9. The liquid cooling server cabinet according to claim 7, characterized in that: An annular connecting ring is formed outside the opening, a plurality of annular cutting grooves are formed on the outer wall of the annular connecting ring, and the annular connecting ring is welded and sealed with the annular limiting portion.

10. The liquid cooling server cabinet according to claim 1, characterized in that: A second liquid level sensor is arranged in the water cooling box, and the server cabinet is connected to the cooling liquid discharge system. When the water level is lower than the minimum value of the server cabinet, the cooling liquid discharge system is started.

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