Cooling device for server and control method of cooling device

Abstract

The present invention provides a cooling device and control method for a server, the cooling device includes a rack, a cold plate and a first heat exchanger, the cold plate and the heating element are arranged in contact; the refrigerant A flow path of the cold plate includes a cold plate A1 port and a cold plate A2 port, and the refrigerant B flow path of the first heat exchanger includes a heat exchanger B1 port and a heat exchanger B2 port; a first branch pipe and a second branch pipe are arranged in parallel between the cold plate A1 port and the heat exchanger B1 port; a compressor is provided in the first branch pipe, and a pump is provided in the second branch pipe; a third branch pipe and a fourth branch pipe are arranged in parallel between the cold plate A2 port and the heat exchanger B2 port, a throttling device is provided in the third branch pipe, and a one-way valve is provided in the fourth branch pipe; the cold plate, the first branch pipe, the first heat exchanger and the third branch pipe are connected in sequence to form a first circulation flow path, and the cold plate, the second branch pipe, the first heat exchanger and the fourth branch pipe are connected in sequence to form a second circulation flow path; the circulation flow path is optimized to reduce the power consumption of the cooling device and improve the heat dissipation efficiency.

Description

Technical Field

[0001] The present invention belongs to the field of cooling technology, and in particular relates to a cooling device for a server and a control method of the cooling device. Background Art

[0002] Internet data centers play a crucial role in the development of globalization and informatization, serving as essential infrastructure for industries such as telecommunications, the internet, and finance. Traditionally, air cooling has been the primary cooling method for servers. However, with the increasing computational workload and complexity of data centers, as well as the growing demand for high-density and ultra-high-density data centers, air cooling is no longer sufficient to meet server cooling requirements.

[0003] In recent years, liquid cooling technology has begun to be applied to data center heat dissipation. Because the refrigerant's specific heat capacity is higher than that of air, it can precisely dissipate heat from heat-generating components. Liquid cooling has become a trend in data center server cooling. Existing cooling devices, due to irrational structural design and a single cooling path, result in low heat exchange efficiency and high power consumption, making them unable to meet diverse cooling requirements. Summary of the Invention

[0004] In view of this, the present invention provides a cooling device for a server and a control method for the cooling device to solve the problems in the prior art such as unreasonable structural design of the cooling device and a single cooling flow path resulting in low heat exchange efficiency and high power consumption and inability to meet different cooling requirements.

[0005] The present invention provides a cooling device for a server, wherein the server includes a heating element; the cooling device includes a rack and a refrigerant system; an installation cavity is formed inside the rack, and the installation cavity is used to install the server;

[0006] The refrigerant system includes a first heat exchanger and a cold plate, wherein one or more cold plates are provided, and the one or more cold plates are used to form a one-to-one correspondence with the heating element to form a heat conduction relationship; when there are multiple cold plates, the multiple cold plates are arranged in parallel; a refrigerant A flow path is formed inside the cold plate, and the refrigerant A flow path includes a cold plate A1 port and a cold plate A2 port, and the cold plate A1 port and the cold plate A2 port are used for the refrigerant to flow in and out;

[0007] A refrigerant B flow path and a natural cooling source flow path having a heat exchange relationship are formed inside the first heat exchanger; the refrigerant B flow path includes a heat exchanger port B1 and a heat exchanger port B2, and the heat exchanger ports B1 and B2 are used for the refrigerant to flow in and out; the natural cooling source flow path includes a heat exchanger port B3 and a heat exchanger port B4, and the heat exchanger ports B3 and B4 are used for the natural cooling source to flow in and out;

[0008] A first branch pipe and a second branch pipe are provided in parallel between the cold plate A1 port and the heat exchanger B1 port; a compressor is provided in the first branch pipe, and a pump is provided in the second branch pipe; a third branch pipe and a fourth branch pipe are provided in parallel between the cold plate A2 port and the heat exchanger B2 port; a throttling device is provided in the third branch pipe, and a one-way valve is provided in the fourth branch pipe; the one-way valve only allows refrigerant to flow from the cold plate to the first heat exchanger;

[0009] The first branch pipeline, the second branch pipeline, the third branch pipeline and the fourth branch pipeline can all be controlled to be connected or disconnected, so that the cold plate, the first branch pipeline, the first heat exchanger and the third branch pipeline are connected in sequence to form a first circulation flow path, or the cold plate, the second branch pipeline, the first heat exchanger and the fourth branch pipeline are connected in sequence to form a second circulation flow path.

[0010] Further optionally, a first control valve is further provided in the first branch pipe, the first control valve and the compressor are arranged in series, and the first control valve is located on the refrigerant inlet side of the compressor; the first control valve can be controlled to connect or disconnect the first branch pipe;

[0011] A second control valve and a liquid storage tank are also provided in the second branch pipeline. The second control valve, pump and liquid storage tank are arranged in series in sequence, and the second control valve is located on the refrigerant outlet side of the pump, and the liquid storage tank is located on the refrigerant inlet side of the pump; the second control valve can be controlled to connect or disconnect the second branch pipeline.

[0012] Further optionally, the refrigerant system further includes a second heat exchanger, which is disposed on the back plate of the rack and is configured to be disposed on the air inlet side of the server; the second heat exchanger and the cold plate are disposed in parallel, and a refrigerant C flow path is formed inside the second heat exchanger; the refrigerant C flow path includes a heat exchanger C1 port and a heat exchanger C2 port, and the heat exchanger C1 port and the heat exchanger C2 port are used for the refrigerant to flow in and out;

[0013] The air on the air inlet side of the server can exchange heat with the refrigerant flowing through the second heat exchanger, and then enter the rack to exchange heat with the heating element.

[0014] Further optionally, the first control valve is a three-way valve, and the first control valve includes a control valve port D1, a control valve port D2, and a control valve port D3; the control valve port D1 is connected to the cold plate A1 port, and the control valve port D2 is connected to the refrigerant inlet of the compressor;

[0015] The heat exchanger C1 port and the cold plate A2 port are connected with a fifth branch pipeline, and the heat exchanger C2 port and the control valve D3 port are connected with a sixth branch pipeline; the sixth branch pipeline, the first branch pipeline, the first heat exchanger, the third branch pipeline, the fifth branch pipeline and the second heat exchanger can be connected to form a third circulation flow path.

[0016] Further optionally, when the refrigerant flows through the first circulation flow path, the refrigerant first flows out of the refrigerant A flow path through the cold plate A1 port, then flows through the compressor and enters the refrigerant B flow path through the heat exchanger B1 port, then flows out of the refrigerant B flow path through the heat exchanger B2 port, flows through the throttling device, and then enters the refrigerant A flow path through the cold plate A2 port;

[0017] When the refrigerant flows through the second circulation path, the refrigerant first flows out of the refrigerant A path through the cold plate A2 port, then flows through the one-way valve and enters the refrigerant B path through the heat exchanger B2 port, then flows out of the refrigerant B path through the heat exchanger B1 port, flows through the liquid storage tank and the pump, and then enters the refrigerant A path through the cold plate A1 port.

[0018] Further optionally, the pressure of the refrigerant in the first circulation flow path and the second circulation flow path is lower than the atmospheric pressure; and / or the refrigerant is a non-conductive fluorinated liquid.

[0019] Further optionally, the first control valve and the second control valve are configured as:

[0020] When the temperature of the environment in which the cooling device is located is higher than or equal to a preset temperature, the first control valve is in an open state and the second control valve is in a closed state, and the refrigerant can flow through the first circulation path;

[0021] When the temperature of the environment in which the cooling device is located is lower than a preset temperature, the first control valve is in a closed state and the second control valve is in an open state, and the refrigerant can flow through the second circulation path.

[0022] The present invention further provides a method for controlling a cooling device, wherein the cooling device is any of the cooling devices for a server described above; the control method comprises:

[0023] Obtaining the current temperature of the environment in which the cooling device is located;

[0024] determining a target circulation flow path according to the current temperature;

[0025] controlling the target circulation flow path to be connected and allowing the refrigerant to flow through the target circulation flow path;

[0026] The target circulation flow path is the first circulation flow path or the second circulation flow path.

[0027] Further optionally, determining the target circulation path according to the current temperature includes:

[0028] comparing the current temperature with a preset temperature;

[0029] When the current temperature is higher than or equal to the preset temperature, determining that the target circulation flow path is the first circulation flow path;

[0030] When the current temperature is lower than the preset temperature, the target circulation flow path is determined to be the second circulation flow path.

[0031] Further optionally, controlling the target circulation flow path to be connected includes:

[0032] When the target circulation flow path is the first circulation flow path, controlling the first branch pipeline and the third branch pipeline to be connected, controlling the second branch pipeline and the fourth branch pipeline to be disconnected, and controlling the compressor to operate;

[0033] When the target circulation flow path is the second circulation flow path, the second branch pipeline and the fourth branch pipeline are controlled to be connected, the first branch pipeline and the third branch pipeline are controlled to be disconnected, and the pump is controlled to operate.

[0034] Further optionally, the control method further includes:

[0035] When the pump is in operation, obtaining the current pressure of the refrigerant in the second circulation flow path;

[0036] comparing the current pressure to atmospheric pressure;

[0037] When the current pressure is greater than or equal to the atmospheric pressure, the pump is controlled to stop running, and the second branch pipeline and the fourth branch pipeline are controlled to be disconnected.

[0038] Compared with the prior art, the beneficial effects of the present invention are mainly:

[0039] The design includes a first circulation flow path and a second circulation flow path. A compressor is provided in the first circulation flow path, and a pump is provided in the second circulation flow path. When the ambient temperature is low, the low-temperature water or low-temperature air in the environment is fully utilized for heat exchange with the refrigerant, and then the refrigerant is input into the cold plate through the pump to dissipate heat to the heating element, thereby reducing the power consumption of the cooling device. When the ambient temperature is high, the refrigerant dissipates heat to the heating element through the action of the compressor, with high heat dissipation efficiency, which can meet the heat dissipation needs of servers with high heat flux density. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0041] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0042] Figure 1 A schematic diagram of the assembly structure of a cooling device and a server embodiment provided by the present invention;

[0043] Figure 2 A schematic flow chart of an embodiment of a control method for a cooling device provided by the present invention;

[0044] In the picture:

[0045] 11-first heat exchanger; 12-second heat exchanger; 13-cold plate;

[0046] 21-first branch pipeline; 22-first control valve; 23-compressor;

[0047] 31-second branch pipeline; 32-second control valve; 33-pump; 34-liquid storage tank; 35-pressure sensor;

[0048] 41-third branch pipeline; 42-throttling device;

[0049] 51-fourth branch pipeline; 52-one-way valve;

[0050] 61- rack; 611- installation cavity; 62- server; 621- heating element. DETAILED DESCRIPTION

[0051] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0052] The terms used in the embodiments of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a," "the," and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. "A plurality" generally includes at least two, but does not exclude the inclusion of at least one.

[0053] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0054] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0055] Existing cooling devices have low heat exchange efficiency and high power consumption due to unreasonable structural design and single cooling flow path, which cannot meet different cooling needs.

[0056] The present invention creatively provides a cooling device for a server, wherein the server includes a heating element; the cooling device includes a rack and a refrigerant system; an installation cavity for arranging the server is formed inside the rack;

[0057] The refrigerant system includes a first heat exchanger and a cold plate, and the cold plate and the heating element form a heat conduction relationship; a refrigerant A flow path is formed inside the cold plate, and the refrigerant A flow path includes a cold plate A1 port and a cold plate A2 port; a refrigerant B flow path and a natural cold source flow path having a heat exchange relationship are formed inside the first heat exchanger; the refrigerant B flow path includes a heat exchanger B1 port and a heat exchanger B2 port, and the natural cold source flow path can flow through the natural cold source; a first branch pipe and a second branch pipe are arranged in parallel between the cold plate A1 port and the heat exchanger B1 port; a compressor is arranged in the first branch pipe, and a pump is arranged in the second branch pipe; a third branch pipe and a fourth branch pipe are arranged in parallel between the cold plate A2 port and the heat exchanger B2 port; a throttling device is arranged in the third branch pipe, and a one-way valve is arranged in the fourth branch pipe;

[0058] When the cold plate, the first branch pipe, the first heat exchanger and the third branch pipe are connected in sequence, a first circulation flow path can be formed; when the cold plate, the second branch pipe, the first heat exchanger and the fourth branch pipe are connected in sequence, a second circulation flow path can be formed;

[0059] When the ambient temperature is low, the low-temperature water or low-temperature air in the environment is fully utilized for heat exchange with the refrigerant to reduce the power consumption of the cooling device; when the ambient temperature is high, the refrigerant dissipates heat to the heating element through the action of the compressor, and the heat dissipation efficiency is high.

[0060] <Cooling device>

[0061] like Figure 1 As shown, this embodiment provides a cooling device for a server, wherein the server 62 includes a heating element 621; the cooling device includes a rack 61 and a refrigerant system; a mounting cavity 611 is formed inside the rack 61, and the mounting cavity 611 is used to mount the server 62; preferably, the server 62 is a high heat flux density server 62; specifically, a plurality of mounting cavities 611 are provided, and each mounting cavity 611 can be equipped with a server 62;

[0062] The refrigerant system includes a first heat exchanger 11 and a cold plate 13. One or more cold plates 13 are provided. The one or more cold plates 13 are used to form a one-to-one correspondence with the heating element 621 to form a heat conduction relationship. When multiple cold plates are provided, the multiple cold plates 13 are arranged in parallel. Preferably, the cold plate 13 is arranged to be in contact with the heating element 621. A refrigerant A flow path is formed inside the cold plate 13. The refrigerant A flow path includes a cold plate A1 port and a cold plate A2 port. The cold plate A1 port and the cold plate A2 port are used for the refrigerant to flow in and out.

[0063] A refrigerant B flow path and a natural cold source flow path with a heat exchange relationship are formed inside the first heat exchanger 11; the refrigerant B flow path includes a heat exchanger B1 port and a heat exchanger B2 port, and the heat exchanger B1 port and the heat exchanger B2 port are used for flowing in and out of the refrigerant; the natural cold source flow path includes a heat exchanger B3 port and a heat exchanger B4 port, and the heat exchanger B3 port and the heat exchanger B4 port are used for flowing in and out of the natural cold source; preferably, the first heat exchanger 11 is a plate heat exchanger, and the natural cold source flow path can flow through a natural cold source used for heat exchange with the refrigerant, and the natural cold source includes water or air in the environment in which the cooling device is located.

[0064] A first branch pipe 21 and a second branch pipe 31 are provided in parallel between the cold plate A1 port and the heat exchanger B1 port; a compressor 23 is provided in the first branch pipe 21, and a pump 33 is provided in the second branch pipe 31; a third branch pipe 41 and a fourth branch pipe 51 are provided in parallel between the cold plate A2 port and the heat exchanger B2 port; a throttling device 42 is provided in the third branch pipe 41, preferably, the throttling device 42 is a throttle valve; a one-way valve 52 is provided in the fourth branch pipe 51; the one-way valve 52 only allows the refrigerant to flow from the cold plate 13 to the first heat exchanger 11; specifically, the refrigerant flowing out of the cold plate 13 can enter the first heat exchanger 11 through the one-way valve 52, and the refrigerant flowing out of the first heat exchanger 11 cannot enter the cold plate 13 through the one-way valve 52;

[0065] The first branch pipe 21 and the second branch pipe 31 can both be controlled to be connected or disconnected, so that the cold plate 13, the first branch pipe 21, the first heat exchanger 11 and the third branch pipe 41 are connected in sequence to form a first circulation flow path, or the cold plate 13, the second branch pipe 31, the first heat exchanger 11 and the fourth branch pipe 51 are connected in sequence to form a second circulation flow path; specifically, when the first branch pipe 21 is connected and the second branch pipe 31 is disconnected, the cold plate 13, the first branch pipe 21, the first heat exchanger 11 and the third branch pipe 41 can be connected in sequence to form the first circulation flow path; when the second branch pipe 31 is connected and the first branch pipe 21 is disconnected, the cold plate 13, the second branch pipe 31, the first heat exchanger 11 and the fourth branch pipe 51 can be connected in sequence to form the second circulation flow path;

[0066] The first circulation flow path and the second circulation flow path are both independent circulation flow paths. The liquid refrigerant enters the cold plate 13. In the cold plate 13, the liquid refrigerant turns into gaseous refrigerant and absorbs the heat of the heating element 621. This has a high heat exchange efficiency and can meet the heat dissipation requirements of high heat flux density services.

[0067] When the ambient temperature is low, the low-temperature water or low-temperature air in the environment is fully utilized for heat exchange with the refrigerant, and then the refrigerant is input into the cold plate 13 through the pump 33 to dissipate heat to the heating element 621, thereby reducing the power consumption of the cooling device; when the ambient temperature is high, the refrigerant is used to dissipate heat to the heating element 621 through the action of the compressor 23, and the heat dissipation efficiency is high, which can meet the heat dissipation requirements of the high heat flux density server 62.

[0068] To address the issue of refrigerant leakage through the circulation flow path causing damage to the server 62, this embodiment proposes that the refrigerant pressure in the first circulation flow path and the second circulation flow path is lower than atmospheric pressure. When a leak occurs in the circulation flow path, the refrigerant will not flow out through the leak point for a short period of time because the refrigerant pressure in the circulation flow path is lower than atmospheric pressure.

[0069] Furthermore, the refrigerant is a non-conductive fluorinated liquid; when the pressure of the refrigerant in the circulation flow path is equal to or greater than the atmospheric pressure, the refrigerant drips onto the server 62 through the leakage point. Since the refrigerant is non-conductive, it does not damage the server 62, thereby improving the reliability of the cooling device.

[0070] To address the problem of being unable to timely control the connection or disconnection of the first branch pipe 21 and the second branch pipe 31, this embodiment proposes that a first control valve 22 is further provided in the first branch pipe 21. The first control valve 22 and the compressor 23 are arranged in series, and the first control valve 22 is located on the refrigerant inlet side of the compressor 23. The first control valve 22 can be controlled to connect or disconnect the first branch pipe 21.

[0071] The second branch line 31 is further provided with a second control valve 32 and a liquid storage tank 34. The second control valve 32, the pump 33, and the liquid storage tank 34 are sequentially arranged in series. The second control valve 32 is located on the refrigerant outlet side of the pump 33. The second control valve 32 can be controlled to connect or disconnect the second branch line 31. The liquid storage tank 34 is located on the refrigerant inlet side of the pump 33 and is provided with a pressure sensor 35 for detecting the pressure in the liquid storage tank 34.

[0072] The maximum flow area of ​​the first control valve 22 is smaller than the maximum flow area of ​​the second control valve 32 .

[0073] The first control valve 22 and the second control valve 32 are both solenoid valves. The cooling device further includes a controller, to which the pressure sensor 35, the pump 33, the compressor 23, and the first control valve 22 and the second control valve 32 are all electrically connected. The controller can control the first control valve 22 and the second control valve 32 according to the pressure signal transmitted by the pressure sensor 35, thereby connecting the corresponding circulation flow paths and controlling the operation of the pump 33 or the compressor 23 to circulate the refrigerant in the corresponding circulation flow paths, thereby achieving heat dissipation for the heating element 621.

[0074] The first control valve 22 and the second control valve 32 are configured as follows:

[0075] When the temperature of the environment in which the cooling device is located is higher than or equal to the preset temperature, the first control valve 22 is in the open state and the second control valve 32 is in the closed state, and the refrigerant can flow through the first circulation path;

[0076] When the temperature of the environment in which the cooling device is located is lower than a preset temperature, the first control valve 22 is in a closed state and the second control valve 32 is in an open state, and the refrigerant can flow through the second circulation path.

[0077] The refrigerant flows in different directions in the first circulation flow path and the second circulation flow path. When the refrigerant flows through the first circulation flow path, the refrigerant flows out through the cold plate 13, then flows through the compressor 23 and the first heat exchanger 11 in sequence, and then enters the cold plate 13. When the refrigerant flows through the second circulation flow path, the refrigerant flows out through the cold plate 13, then flows through the first heat exchanger 11 and the pump 33 in sequence, and then enters the cold plate 13.

[0078] Specifically, when the refrigerant flows through the first circulation path, the refrigerant first flows out of the refrigerant A path through the cold plate A1 port, then flows through the compressor 23 and enters the refrigerant B path through the heat exchanger B1 port, then flows out of the refrigerant B path through the heat exchanger B2 port, flows through the throttling device 42, and then enters the refrigerant A path through the cold plate A2 port;

[0079] When the refrigerant flows through the second circulation path, the refrigerant first flows out of the refrigerant A path through the cold plate A2 port, then flows through the one-way valve 52 and enters the refrigerant B path through the heat exchanger B2 port, then flows out of the refrigerant B path through the heat exchanger B1 port, flows through the liquid storage tank 34 and the pump 33, and then enters the refrigerant A path through the cold plate A1 port.

[0080] To address the problem of low heat dissipation efficiency for the heating element 621 due to relying solely on the compressor 23 to cool the refrigerant when the ambient temperature is high, this embodiment proposes that the refrigerant system further includes a second heat exchanger 12, which is disposed on the back plate of the rack 61 and is configured to be disposed on the air inlet side of the server 62; the second heat exchanger 12 and the cold plate 13 are disposed in parallel; a refrigerant C flow path is formed inside the second heat exchanger 12, and the refrigerant C flow path includes a heat exchanger C1 port and a heat exchanger C2 port, which are used for the refrigerant to flow in and out;

[0081] The air on the air inlet side of the server 62 can exchange heat with the refrigerant flowing through the second heat exchanger 12 , and then enter the rack 61 to exchange heat with the heating element 621 .

[0082] Furthermore, the first control valve 22 is a three-way valve, and the first control valve 22 is formed with a control valve port D1, a control valve port D2, and a control valve port D3; the control valve port D1 is connected to the cold plate A1 port, and the control valve port D2 is connected to the refrigerant inlet of the compressor 23;

[0083] The heat exchanger C1 port and the cold plate A2 port are connected by a fifth branch pipe, and the heat exchanger C2 port and the control valve D3 port are connected by a sixth branch pipe; the sixth branch pipe, the first branch pipe, the first heat exchanger 11, the third branch pipe, the fifth branch pipe and the second heat exchanger 12 can be connected to form a third circulation flow path. When the refrigerant circulates in the third circulation flow path, the air on the air inlet side of the server 62 can be cooled.

[0084] When the ambient temperature is low, in order to make full use of the natural cold source, low-temperature water or low-temperature air is obtained from the environment to cool the refrigerant, while reducing the energy consumption of the cooling device and minimizing the opening time of the compressor 23; at this time, the second control valve 32 is controlled to be open, and the first control valve 22 is controlled to be closed, so that the second branch pipe 31 is connected and the first branch pipe 21 is disconnected, and the pump 33 is controlled to run and the compressor 23 is stopped; the liquid refrigerant passes through the second control valve 32 under the drive of the pump 33 and enters the cold plate 13, and the refrigerant changes from liquid to gas in the cold plate 13. The gaseous refrigerant passes through the one-way valve 52 and enters the first heat exchanger 11. The gaseous refrigerant is cooled by the low-temperature water in the first heat exchanger 11 and changes from gas to liquid. The gaseous refrigerant enters the liquid storage tank 34, and the liquid refrigerant enters the pump 33. The pressure sensor 35 monitors the pressure of the refrigerant in the liquid storage tank 34 in real time. If the pressure of the refrigerant is greater than or equal to the atmospheric pressure, the first control valve 22 and the second control valve 32 are controlled to close, so that the first branch pipe 21 and the second branch pipe 31 are disconnected, and maintenance is carried out.

[0085] When the ambient temperature is high, the efficiency of cooling the gaseous refrigerant into liquid refrigerant by relying solely on a natural cold source is low; at this time, the first control valve 22 is controlled to be open, and the second control valve 32 is controlled to be closed, so that the first branch pipe 21 is connected and the second branch pipe 31 is disconnected, and the compressor 23 is controlled to run and the pump 33 is stopped; the gaseous refrigerant passes through the first control valve 22 and enters the compressor 23. After being compressed by the compressor 23, the gaseous refrigerant becomes a high-temperature and high-pressure gaseous refrigerant, and then enters the first heat exchanger 11. The high-temperature and high-pressure gaseous refrigerant is cooled by the higher-temperature water obtained from the environment in the first heat exchanger 11 and becomes a high-pressure liquid refrigerant. After passing through the throttling device 42, the high-pressure liquid refrigerant becomes a low-temperature gas-liquid two-phase refrigerant. , and then divided into two paths; a part of the gas-liquid two-phase refrigerant enters the cold plate 13 to absorb heat and cool the heating element 621. After absorbing heat, the refrigerant turns into gaseous refrigerant again and enters the compressor 23 through the first control valve 22; the other part of the gas-liquid two-phase refrigerant enters the second heat exchanger 12 through the fifth branch pipe to evaporate, and exchanges heat with the air on the air inlet side of the server 62, thereby reducing the air temperature on the air inlet side of the server 62. When the low-temperature air flows through the server 62, it can take away part of the heat of the server 62, which helps to alleviate the problem of insufficient heat dissipation capacity of the cold plate 13 under the condition of high power consumption of the server 62; the gaseous refrigerant flowing out of the second heat exchanger 12 enters the first control valve 22 through the sixth branch pipe, and then enters the compressor 23.

[0086] The first control valve 22 , the compressor 23 , the second control valve 32 , the pump 33 , the liquid storage tank 34 , the pressure sensor 35 and the first heat exchanger 11 in the refrigerant system are all arranged at the bottom inside the rack 61 , specifically, below the server 62 .

[0087] <Control Method>

[0088] like Figure 2 As shown, this embodiment provides a control method for a cooling device, where the cooling device is any of the above cooling devices for a server; the control method includes:

[0089] S1. Obtain the current temperature of the environment in which the cooling device is located;

[0090] S2. Determine the target circulation flow path according to the current temperature;

[0091] S3, controlling the target circulation flow path to be connected and allowing the refrigerant to flow through the target circulation flow path;

[0092] The target circulation flow path is the first circulation flow path or the second circulation flow path.

[0093] Furthermore, S2 includes:

[0094] Compare the current temperature with the preset temperature;

[0095] When the current temperature is higher than or equal to the preset temperature, determining the target circulation flow path as the first circulation flow path;

[0096] When the current temperature is lower than the preset temperature, the target circulation flow path is determined to be the second circulation flow path.

[0097] S3 includes:

[0098] When the target circulation flow path is the first circulation flow path, the first branch pipe 21 is controlled to be connected and the second branch pipe 31 is disconnected, and the compressor 23 is controlled to operate; that is, the first control valve 22 is controlled to be open and the second control valve 32 is controlled to be closed, so that the refrigerant can circulate in the first circulation flow path and the third circulation flow path, thereby dissipating heat to the heating element 621;

[0099] When the target circulation flow path is the second circulation flow path, the second branch pipe 31 is controlled to be connected and the first branch pipe 21 is disconnected, and the pump 33 is controlled to run; that is, the second control valve 32 is controlled to be connected and the first control valve 22 is controlled to be disconnected; so that the refrigerant can circulate in the second circulation flow path, thereby dissipating heat to the heating element 621.

[0100] In addition, control methods include:

[0101] When the pump 33 is in operation, the current pressure of the refrigerant in the second circulation path is obtained;

[0102] Compare current pressure to atmospheric pressure;

[0103] When the current pressure is greater than or equal to the atmospheric pressure, the pump 33 is controlled to stop running and the second branch pipe 31 is controlled to be disconnected.

[0104] While the exemplary embodiments of the present disclosure have been specifically illustrated and described above, it should be understood that the present disclosure is not limited to the detailed structures, configurations, or implementations described herein; rather, the present disclosure is intended to encompass various modifications and equivalent configurations within the spirit and scope of the appended claims.

Claims

1. A cooling device for a server, wherein the server (62) comprises a heating element (621); The cooling device comprises a frame (61) and a refrigerant system; an installation cavity (611) is formed inside the frame (61), and the installation cavity (611) is used to install the server (62); The refrigerant system comprises a first heat exchanger (11) and a cold plate (13), wherein one or more cold plates (13) are provided, and the one or more cold plates (13) are used to form a heat conduction relationship with the heating element (621) in a one-to-one correspondence; when multiple cold plates (13) are provided, the multiple cold plates (13) are arranged in parallel; a refrigerant A flow path is formed inside the cold plate (13), and the refrigerant A flow path comprises a cold plate A1 port and a cold plate A2 port, and the cold plate A1 port and the cold plate A2 port are used for the refrigerant to flow in and out; The first heat exchanger (11) has a refrigerant B flow path and a natural cold source flow path with a heat exchange relationship formed therein; the refrigerant B flow path includes a heat exchanger B1 port and a heat exchanger B2 port, and the heat exchanger B1 port and the heat exchanger B2 port are used for the refrigerant to flow in and out; the natural cold source flow path includes a heat exchanger B3 port and a heat exchanger B4 port, and the heat exchanger B3 port and the heat exchanger B4 port are used for the natural cold source to flow in and out; A first branch pipeline (21) and a second branch pipeline (31) are arranged in parallel between the cold plate A1 port and the heat exchanger B1 port; a compressor (23) is arranged in the first branch pipeline (21), and a pump (33) is arranged in the second branch pipeline (31); a third branch pipeline (41) and a fourth branch pipeline (51) are arranged in parallel between the cold plate A2 port and the heat exchanger B2 port; a throttling device (42) is arranged in the third branch pipeline (41), and a one-way valve (52) is arranged in the fourth branch pipeline (51); the one-way valve (52) only allows refrigerant to flow from the cold plate (13) to the first heat exchanger (11); The first branch pipe (21) and the second branch pipe (31) can be controlled to be connected or disconnected, so that the cold plate (13), the first branch pipe (21), the first heat exchanger (11) and the third branch pipe (41) are connected in sequence to form a first circulation flow path, or the cold plate (13), the second branch pipe (31), the first heat exchanger (11) and the fourth branch pipe (51) are connected in sequence to form a second circulation flow path.

2. The cooling device for a server according to claim 1, wherein: A first control valve (22) is further provided in the first branch pipe (21). The first control valve (22) and the compressor (23) are arranged in series, and the first control valve (22) is located on the refrigerant inlet side of the compressor (23). The first control valve (22) can be controlled to connect or disconnect the first branch pipe (21). A second control valve (32) and a liquid storage tank (34) are further provided in the second branch pipeline (31). The second control valve (32), the pump (33) and the liquid storage tank (34) are sequentially arranged in series, and the second control valve (32) is located on the refrigerant outlet side of the pump (33), and the liquid storage tank (34) is located on the refrigerant inlet side of the pump (33). The second control valve (32) can be controlled to connect or disconnect the second branch pipeline (31).

3. The cooling device for a server according to claim 2, characterized in that: The refrigerant system further comprises a second heat exchanger (12), the second heat exchanger (12) being arranged on the back plate of the rack (61) and being used to be arranged on the air inlet side of the server (62); the second heat exchanger (12) and the cold plate (13) being arranged in parallel, a refrigerant C flow path being formed inside the second heat exchanger (12); the refrigerant C flow path comprising a heat exchanger C1 port and a heat exchanger C2 port, the heat exchanger C1 port and the heat exchanger C2 port being used for the refrigerant to flow in and out; The air on the air inlet side of the server (62) can exchange heat with the refrigerant flowing through the second heat exchanger (12), and then enter the rack (61) to exchange heat with the heating element (621).

4. The cooling device for a server according to claim 3, characterized in that: The first control valve (22) is a three-way valve, and the first control valve (22) includes a control valve port D1, a control valve port D2, and a control valve port D3; the control valve port D1 is connected to the cold plate port A1, and the control valve port D2 is connected to the refrigerant inlet of the compressor (23); The heat exchanger C1 port and the cold plate A2 port are connected with a fifth branch pipeline, and the heat exchanger C2 port and the control valve D3 port are connected with a sixth branch pipeline; the sixth branch pipeline, the first branch pipeline, the first heat exchanger, the third branch pipeline, the fifth branch pipeline and the second heat exchanger can be connected to form a third circulation flow path.

5. The cooling device for a server according to claim 2, wherein: When the refrigerant flows through the first circulation flow path, the refrigerant first flows out of the refrigerant A flow path through the cold plate A1 port, then flows through the compressor (23) and enters the refrigerant B flow path through the heat exchanger B1 port, then flows out of the refrigerant B flow path through the heat exchanger B2 port, flows through the throttling device (42), and then enters the refrigerant A flow path through the cold plate A2 port; When the refrigerant flows through the second circulation flow path, the refrigerant first flows out of the refrigerant A flow path through the cold plate A2 port, then flows through the one-way valve (52) and enters the refrigerant B flow path through the heat exchanger B2 port, then flows out of the refrigerant B flow path through the heat exchanger B1 port, flows through the liquid storage tank (34) and the pump (33), and then enters the refrigerant A flow path through the cold plate A1 port.

6. The cooling device for a server according to claim 5, characterized in that: The pressure of the refrigerant in the first circulation flow path and the second circulation flow path is lower than the atmospheric pressure; and / or the refrigerant is a non-conductive fluorinated liquid.

7. The cooling device for a server according to claim 5, characterized in that: The first control valve (22) and the second control valve (32) are configured as follows: When the temperature of the environment in which the cooling device is located is higher than or equal to a preset temperature, the first control valve (22) is in an open state and the second control valve (32) is in a closed state, and the refrigerant can flow through the first circulation flow path; When the temperature of the environment in which the cooling device is located is lower than a preset temperature, the first control valve (22) is in a closed state and the second control valve (32) is in an open state, and the refrigerant can flow through the second circulation flow path.

8. A method for controlling a cooling device, characterized in that: The cooling device is a cooling device for a server according to any one of claims 1 to 7; the control method comprises: Obtaining the current temperature of the environment in which the cooling device is located; determining a target circulation flow path according to the current temperature; controlling the target circulation flow path to be connected and allowing the refrigerant to flow through the target circulation flow path; The target circulation flow path is the first circulation flow path or the second circulation flow path.

9. The control method of the cooling device according to claim 8, characterized in that: Determining the target circulation path according to the current temperature includes: comparing the current temperature with a preset temperature; When the current temperature is higher than or equal to the preset temperature, determining that the target circulation flow path is the first circulation flow path; When the current temperature is lower than the preset temperature, the target circulation flow path is determined to be the second circulation flow path.

10. The control method of the cooling device according to claim 8, characterized in that: The controlling the target circulation flow path to be connected includes: When the target circulation flow path is the first circulation flow path, controlling the first branch pipe (21) to be connected and the second branch pipe (31) to be disconnected, and controlling the compressor (23) to operate; When the target circulation flow path is the second circulation flow path, the second branch pipe (31) is controlled to be connected and the first branch pipe (21) is controlled to be disconnected, and the pump (33) is controlled to operate.

11. The control method of the cooling device according to claim 10, characterized in that: The control method further includes: When the pump (33) is in operation, obtaining the current pressure of the refrigerant in the second circulation flow path; comparing the current pressure to atmospheric pressure; When the current pressure is greater than or equal to the atmospheric pressure, the pump (33) is controlled to stop running, and the second branch pipeline (31) is controlled to be disconnected.

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