Data center cooling system based on seasonal cold storage of soil

Abstract

The invention relates to the technical field of refrigeration, and discloses a data center cooling system based on soil cross-seasonal cold storage, which comprises a refrigeration cycle subsystem, a soil cold storage / cold release cycle subsystem and a data machine room cooling cycle subsystem, cold is supplied to the data center or underground soil is utilized to dissipate heat; the soil cold storage / cold release circulation subsystem is used for storing cold energy in underground soil, or releasing the cold energy of the soil, or dissipating heat for a refrigerating unit and exchanging cold energy with the soil; the data machine room cooling circulation subsystem is used for transmitting cold energy to the data machine room by means of working medium circulation. Cold energy is stored by using natural properties of large specific heat capacity and good cold insulation effect of soil, and air cold energy in low-temperature periods in winter and transition seasons is stored and released in high-temperature periods to cool a data room, so that the requirement of the data center for mechanical refrigeration is reduced, and energy consumption and carbon emission of the data center are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration, and particularly to a data center cooling system based on seasonal cold storage in soil. Background Art

[0002] With the rapid development of communication technologies, the number of data centers in China has been increasing year by year. Moreover, with the continuous development of new digital switching equipment, the heat generation per unit area of a single device has increased sharply, leading to an increase in the heat generation of the entire computer room. According to statistics, the energy consumption of the refrigeration and air-conditioning system in a typical data center accounts for about 40% of the total energy consumption of the data center. Therefore, energy conservation and consumption reduction are of great significance for improving the operational economy of data centers.

[0003] Although the traditional air-conditioning refrigeration method can meet the basic cooling requirements, in large data centers, problems such as low energy efficiency ratio, high energy consumption, and high maintenance costs have become increasingly prominent. Using natural cold sources to cool data centers is an effective energy-saving method. This technology can make full use of outdoor cold air to cool data centers in winter, but in summer when the outdoor temperature is relatively high, the cooling capacity of natural cold sources will be greatly reduced. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a data center cooling system based on seasonal cold storage in soil, which solves the problem that the cooling capacity of natural cold sources will be greatly reduced in summer when the outdoor temperature is relatively high for cooling data centers.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A data center cooling system based on seasonal cold storage in soil, comprising a refrigeration cycle subsystem, a soil cold storage / cold release cycle subsystem, and a data computer room cooling cycle subsystem:

[0006] The refrigeration cycle subsystem is used to transfer heat through the refrigerant cycle to supply cold to the data center or dissipate heat using underground soil;

[0007] The soil cold storage / cold release cycle subsystem is used to store cold energy in underground soil, or release soil cold energy, or dissipate heat for the refrigeration unit, and exchange cold energy with the soil;

[0008] The data computer room cooling cycle subsystem is used to transfer cold energy to the data computer room through the working medium cycle to cool or dissipate heat from the data computer room.

[0009] Preferably, the refrigeration circulating water system includes a condenser for cooling the high-temperature refrigerant in the refrigeration circulating subsystem. The types of the condenser include shell-and-tube type, brazed plate type, and double-pipe type. A compressor and a throttling device are sequentially arranged on one side of the condenser. The compressor is used to drive the refrigerant to circulate and compress the low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure gas. The types of the compressor include scroll type, screw type, piston type, and centrifugal type. The throttling device is used to throttle the high-temperature and high-pressure liquid refrigerant into a low-temperature and low-pressure gas-liquid mixture refrigerant. The types of the throttling device include electronic expansion valve, thermostatic expansion valve, and capillary tube. An evaporator is arranged on one side of the compressor and the throttling device for cooling the circulating working medium in the air cooler of the data room. The types of the evaporator include shell-and-tube type, brazed plate type, and double-pipe type. An air cooler is connected to one side of the evaporator. A first variable-frequency circulating pump and a refrigeration cooling tower are sequentially arranged on the other side of the condenser. One side of the first variable-frequency circulating pump is connected to one side of the refrigeration cooling tower.

[0010] Preferably, the soil cold storage / cold release circulating subsystem includes a cold storage working medium circulating pump. A cold storage cooling tower is arranged on one side of the cold storage working medium circulating pump for dissipating the waste heat contained in the cold storage circulating working medium to the outdoor air. The other side of the cold storage working medium circulating pump is respectively connected to a buried heat exchanger and one side of the refrigeration cooling tower through a first three-way valve. The buried heat exchanger is used to store the cold energy contained in the circulating working medium or release the cold energy stored in the soil. One side of the cold storage cooling tower is respectively connected to one side of the buried heat exchanger and one side of the air cooler through a second three-way valve.

[0011] Preferably, the data room cooling circulating subsystem includes a second variable-frequency circulating pump, an air cooler, a first two-way valve, a second two-way valve, a third two-way valve, a fourth two-way valve, a third three-way valve, and a fourth three-way valve. The second variable-frequency circulating pump is arranged on one side of the air cooler. The air cooler is used to release the cold energy contained in the circulating working medium to the data room. One sides of the first two-way valve and the second two-way valve are arranged between the first variable-frequency circulating pump and the refrigeration cooling tower. One sides of the third two-way valve and the fourth two-way valve are arranged between the condenser and the refrigeration cooling tower. One sides of the third three-way valve and the fourth three-way valve are respectively arranged between the evaporator and the air cooler.

[0012] A data center cooling method based on soil seasonal cold storage includes the following steps:

[0013] S1. Start the cold storage working medium circulating pump and the cold storage cooling tower;

[0014] S2. Connect the interfaces of the first three-way valve and the second three-way valve. At the same time, start the second variable-frequency circulating pump, the refrigeration cooling tower, and the air cooler, and open the fourth two-way valve and the fifth two-way valve;

[0015] The interfaces 1# and 2# of the S3, the third three-way valve and the fourth three-way valve are connected, so as to achieve the direct cooling of the soil cold storage combined with the cooling tower.

[0016] Preferably, the following steps are further included:

[0017] A01. The second variable-frequency circulation pump, the refrigeration cooling tower and the air cooler are started;

[0018] A02. The fourth two-way valve and the fifth two-way valve are opened, and the interfaces 1# and 2# of the third three-way valve and the fourth three-way valve are connected, so as to achieve the direct cooling of the cooling tower.

[0019] Preferably, the following steps are further included:

[0020] B01. The second variable-frequency circulation pump and the air cooler are started;

[0021] B02. The interfaces 1# and 3# of the first three-way valve and the second three-way valve are connected, and the interfaces 1# and 2# of the third three-way valve and the fourth three-way valve are connected, so as to achieve the soil cold release for cooling.

[0022] Preferably, the following steps are further included:

[0023] C01. The second variable-frequency circulation pump, the air cooler, the first variable-frequency circulation pump and the compressor are started;

[0024] C02. The first two-way valve and the fourth two-way valve are opened;

[0025] C03. The interfaces 1# and 3# of the first three-way valve and the second three-way valve are connected, and the interfaces 1# and 3# of the third three-way valve and the fourth three-way valve are connected, so as to achieve the cooling of the refrigeration unit with the soil cold source.

[0026] Preferably, the following steps are further included:

[0027] D01. The second variable-frequency circulation pump, the air cooler, the first variable-frequency circulation pump, the compressor and the refrigeration cooling tower are started;

[0028] D02. The interfaces 1# and 3# of the third three-way valve and the fourth three-way valve are connected, and the first two-way valve, the second two-way valve, the third two-way valve and the fourth two-way valve are opened, so as to achieve the cooling of the refrigeration unit with the air cold source.

[0029] The present invention provides a data center cooling system based on soil seasonal cold storage. It has the following

[0030] Beneficial effects:

[0031] 1. The present invention stores cold energy by taking advantage of the natural property of soil with a relatively large specific heat capacity and good cold preservation effect, stores the cold energy of air in the low-temperature periods of winter and transitional seasons, and releases it during the high-temperature periods for cooling the data computer room, thereby reducing the demand of the data center for mechanical refrigeration, reducing the energy consumption and carbon emissions of the data center, and thus solving the problem that the cooling capacity of the natural cold source will be greatly weakened in summer when the outdoor air temperature is relatively high for cooling the data center with the natural cold source.

[0032] 2. The present invention takes advantage of the relatively constant temperature of the underground soil, which is less affected by external climate changes, and can ensure the reliability and continuity of the cooling system even under extreme weather conditions.

[0033] 3. By adopting the method of seasonal soil cold storage, the present invention requires less ground space compared with some other types of energy storage methods, and is particularly suitable for urban areas with tight land resources. In addition, the underground part has good concealment and will not affect the landscape and planning on the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a system composition diagram of a data center cooling system based on seasonal soil cold storage proposed by the present invention;

[0035] Figure 2 is a schematic diagram of the principle of the direct cooling mode of the soil cold storage combined cooling tower of a data center cooling system based on seasonal soil cold storage proposed by the present invention;

[0036] Figure 3 is a schematic diagram of the principle of the direct cooling mode of the cooling tower of a data center cooling system based on seasonal soil cold storage proposed by the present invention;

[0037] Figure 4 is a schematic diagram of the principle of the soil cold release and cooling mode of a data center cooling system based on seasonal soil cold storage proposed by the present invention;

[0038] Figure 5 is a schematic diagram of the principle of the cooling mode of the refrigeration unit with soil cold source of a data center cooling system based on seasonal soil cold storage proposed by the present invention;

[0039] Figure 6 is a schematic diagram of the principle of the cooling mode of the refrigeration unit with air cold source of a data center cooling system based on seasonal soil cold storage proposed by the present invention.

[0040] Among them, 101 is the second variable-frequency circulating pump; 102 is the air cooler; 201 is the condenser; 202 is the compressor; 203 is the evaporator; 204 is the throttling device; 205 is the first variable-frequency circulating pump; 206 is the refrigeration cooling tower; 301 is the cold storage working medium circulating pump; 302 is the cold storage cooling tower; 303 is the buried heat exchange pipe; F1 is the first three-way valve; F2 is the second three-way valve; F3 is the first two-way valve; F4 is the second two-way valve; F5 is the third two-way valve; F6 is the fourth two-way valve; F7 is the third three-way valve; F8 is the fourth three-way valve. Detailed implementation manners

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] Embodiment:

[0043] Please refer to the attached Figure 1 - attached Figure 6 , the embodiment of the present invention provides a data center cooling system based on seasonal cold storage in soil, including a refrigeration cycle subsystem, a soil cold storage / cold release cycle subsystem, and a data room cooling cycle subsystem:

[0044] The refrigeration cycle subsystem is used to transfer heat through the refrigerant cycle to supply cooling for the data center or dissipate heat using the underground soil.

[0045] The soil cold storage / cold release cycle subsystem is used to store cold energy in the underground soil, or release the cold energy of the soil, or dissipate heat for the refrigeration unit, and exchange cold energy with the soil.

[0046] The data room cooling cycle subsystem is used to transfer cold energy to the data room through the working medium cycle to cool or dissipate heat from the data room.

[0047] The refrigeration cycle subsystem includes a condenser 201 which is used to cool the high-temperature refrigerant in the refrigeration cycle subsystem. The types of the condenser 201 include double-pipe type, brazed plate type, and shell-and-tube type. On one side of the condenser 201, a compressor 202 and a throttling device 204 are arranged in sequence. The compressor 202 is used to drive the refrigerant to circulate and compress the low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure gas. The types of the compressor 202 include scroll type, screw type, piston type, and centrifugal type. The throttling device 204 is used to throttle the high-temperature and high-pressure liquid refrigerant into a low-temperature and low-pressure gas-liquid mixed refrigerant. The types of the throttling device 204 include electronic expansion valve, thermostatic expansion valve, and capillary tube. On one side of the compressor 202 and the throttling device 204, there is an evaporator 203 which is used to cool the circulating working medium in the air cooler of the data computer room. The types of the evaporator 203 include double-pipe type, brazed plate type, and shell-and-tube type. One side of the evaporator 203 is connected to an air cooler 102. On the other side of the condenser 201, a first variable-frequency circulation pump 205 and a refrigeration cooling tower 206 are arranged in sequence. One side of the first variable-frequency circulation pump 205 is connected to one side of the refrigeration cooling tower 206.

[0048] The soil cold storage / cold release cycle subsystem includes a cold storage working medium circulation pump 301. On one side of the cold storage working medium circulation pump 301, there is a cold storage cooling tower 302 which is used to dissipate the waste heat contained in the cold storage circulating working medium to the outdoor air. On the other side of the cold storage working medium circulation pump 301, it is respectively connected to a buried heat exchange pipe 303 and one side of the refrigeration cooling tower 206 through a first three-way valve F1. The buried heat exchange pipe 303 is used to store the cold energy contained in the circulating working medium or release the cold energy stored in the soil. One side of the cold storage cooling tower 302 is respectively connected to one side of the buried heat exchange pipe 303 and one side of the air cooler 102 through a second three-way valve F2.

[0049] The data computer room cooling cycle subsystem includes a second variable-frequency circulation pump 101, an air cooler 102, a first two-way valve F3, a second two-way valve F4, a third two-way valve F5, a fourth two-way valve F6, a third three-way valve F7, and a fourth three-way valve F8. The second variable-frequency circulation pump 101 is arranged on one side of the air cooler 102. The air cooler 102 is used to release the cold energy contained in the circulating working medium to the data computer room. One side of the first two-way valve F3 and the second two-way valve F4 is arranged between the first variable-frequency circulation pump 205 and the refrigeration cooling tower 206. One side of the third two-way valve F5 and the fourth two-way valve F6 is arranged between the condenser 201 and the refrigeration cooling tower 206. One side of the third three-way valve F7 and the fourth three-way valve F8 is respectively arranged between the evaporator 203 and the air cooler 102.

[0050] Specifically, the refrigeration cycle subsystem mainly consists of a condenser 201, a compressor 202, an evaporator 203, a throttling device 204, a second variable-frequency circulation pump 205, a refrigeration cooling tower 206, and a working medium pipeline connecting the above components.

[0051] The soil cold storage / cold release cycle subsystem mainly consists of a cold storage working medium circulation pump 301, a cold storage cooling tower 302, a buried heat exchange pipe 303, a first three-way valve F1, a second three-way valve F2, and a working medium pipeline connecting the above components.

[0052] The data center cooling cycle subsystem mainly consists of a second variable-frequency circulation pump 101, an air cooler 102, a first on-off valve F3, a second on-off valve F4, a third on-off valve F5, a fourth on-off valve F6, a third three-way valve F7, a fourth three-way valve F8, and a working medium pipeline connecting the above components.

[0053] By controlling the start and stop of the compressor 202, the second variable-frequency circulation pump 205, and the refrigeration cooling tower 206 in the refrigeration cycle subsystem, the start and stop of the cold storage working medium circulation pump 301 and the cold storage cooling tower 302 in the soil cold storage / cold release cycle subsystem, and the connection switches of each interface of the first three-way valve F1 and the second three-way valve F2, as well as controlling the start and stop of the second variable-frequency circulation pump 101 and the air cooler 102 in the data center cooling cycle subsystem, and the switches of the first on-off valve F3, the second on-off valve F4, the third on-off valve F5, and the fourth on-off valve F6, and the connection switches of the first three-way valve F1 and the second three-way valve F2, the system can achieve the soil cold storage combined cooling tower direct cooling mode, the cooling tower direct cooling mode, the soil cold release cooling mode, the refrigeration unit soil cold source cooling mode, and the refrigeration unit air cold source cooling mode. On the basis of stably and efficiently meeting the cooling requirements of the data center, the operation duration of the refrigeration unit is significantly reduced, and the power consumption of the data center cooling system is reduced.

[0054] Please refer to the attached Figure 2 , a data center cooling method based on soil seasonal cold storage, includes the following steps:

[0055] S1. The cold storage working medium circulation pump 301 and the cold storage cooling tower 302 are started.

[0056] S2. The interfaces of the first three-way valve F1 and the second three-way valve F2 are connected. At the same time, the second variable-frequency circulation pump 101, the refrigeration cooling tower 206, and the air cooler 102 are started, and the fourth two-way valve F4 and the fifth two-way valve F5 are opened.

[0057] S3. The interfaces 1# and 2# of the third three-way valve F7 and the fourth three-way valve F8 are connected, so as to achieve the direct cooling of the combined soil cold storage and cooling tower.

[0058] Specifically, in Mode 1, the soil cold storage combined with the cooling tower direct cooling mode, the system enables this operating mode during the winter and the transitional seasons when the temperature is relatively low.

[0059] Under this operating mode, the operating principle of the soil cold storage / cold release cycle subsystem is as follows: The working medium is driven by the cold storage working medium circulation pump 301, flows into the cold storage cooling tower 302 and directly contacts with the low-temperature air to dissipate heat and its temperature drops. Then, it flows back into the buried heat exchange pipe 303 through the 2# and 1# interfaces of the second three-way valve F2, absorbs the heat of the underground soil, causing the soil temperature to drop. Finally, it flows back into the cold storage working medium circulation pump 301 through the 1# and 2# interfaces of the first three-way valve F1. The working medium circulates according to the above process, absorbs the heat of the underground soil, and releases this part of heat in the cold storage cooling tower 302, ultimately realizing the function of soil cold storage.

[0060] Under this operating mode, the operating principle of the data center cooling circulation subsystem directly using the cold energy of low-temperature air to cool the data center is as follows: The working medium is driven by the second variable-frequency circulation pump 101, and successively flows through the 1# and 2# interfaces of the fourth three-way valve F8 and the second two-way valve into the refrigeration cooling tower 206, directly contacts with the low-temperature air to dissipate heat and its temperature drops. Then, it flows back into the second variable-frequency circulation pump 101 through the 2# and 1# interfaces of the third two-way valve and the third three-way valve, and finally flows into the air cooler 102, absorbs the heat of the air in the data center to lower the temperature of the data center and the cabinets. The working medium circulates according to the above process, absorbs the heat of the data center, and releases this part of heat to the outdoor air in the refrigeration cooling tower 206, ultimately realizing the function of cooling the data center computer room.

[0061] Please refer to Appendix Figure 2 、Appendix Figure 3 , and it also includes the following steps:

[0062] A01. The second variable-frequency circulation pump 101, the refrigeration cooling tower 206, and the air cooler 102 are started;

[0063] A02. The fourth two-way valve F4 and the fifth two-way valve F5 are opened, and the 1# and 2# interfaces of the third three-way valve F7 and the fourth three-way valve F8 are connected, thus achieving direct cooling of the cooling tower.

[0064] Specifically, in Mode 2, the cooling tower direct cooling mode, this operating mode is enabled when the soil cold storage is completed and the outdoor temperature is still relatively low.

[0065] Under this operating mode, the second variable-frequency circulation pump 101, the refrigeration cooling tower 206, and the air cooler 102 are started, the fourth two-way valve F4 and the fifth two-way valve F5 are opened, and the 1# and 2# interfaces of the third three-way valve F7 and the fourth three-way valve F8 are connected.

[0066] As Figure 3 、 Figure 2As shown, the operating principle of the cooling cycle subsystem of the data room in this operating mode is the same as that of Mode 1, which will not be elaborated here.

[0067] Please refer to the appendix Figure 4 , and also includes the following steps:

[0068] B01, the second variable-frequency circulation pump 101, and the air cooler 102 are started;

[0069] B02, the interfaces 1# and 3# of the first three-way valve F1 and the second three-way valve F2 are connected, and the interfaces 1# and 2# of the third three-way valve F7 and the fourth three-way valve F8 are connected, so as to achieve soil cold release for cooling.

[0070] Specifically, in Mode 3, the soil cold release for cooling mode, when the temperature of the outdoor air is relatively high and the cold energy of the air cannot be directly used to cool the data center, while the underground soil temperature is relatively low and the stored cold energy is sufficient, this operating mode is enabled.

[0071] In this operating mode, the second variable-frequency circulation pump 101 and the air cooler 102 are started, and the interfaces 1# and 3# of the first three-way valve F1 and the second three-way valve F2 are connected, and the interfaces 1# and 2# of the third three-way valve F7 and the fourth three-way valve F8 are connected.

[0072] The operating principle of the cooling cycle subsystem of the data room directly using the cold energy stored in the soil to cool the data center in this operating mode is as follows: The working medium is driven by the second variable-frequency circulation pump 101, and successively flows into the buried heat exchange pipe 303 through the interfaces 1# and 2# of the fourth three-way valve F8 and the interfaces 3# and 1# of the first three-way valve F1, releases heat to the underground soil with stored cold energy and relatively low temperature and then the temperature drops, and then flows back into the second variable-frequency circulation pump 101 through the interfaces 1# and 3# of the second three-way valve F2 and the interfaces 2# and 1# of the third three-way valve, and finally flows into the air cooler 102 to absorb the heat of the air in the data room, so that the temperature of the data room and the cabinets drops; The working medium circulates according to the above process, absorbs the heat of the data room, and releases this part of heat to the underground soil in the buried heat exchange pipe 303, and finally realizes the function of cooling the data center computer room.

[0073] Please refer to the appendix Figure 5 , and also includes the following steps:

[0074] C01, the second variable-frequency circulation pump 101, the air cooler 102, the first variable-frequency circulation pump 205, and the compressor 202 are started;

[0075] C02, the first two-way valve F3 and the fourth two-way valve F6 are opened;

[0076] The interfaces 1# and 3# of C03, the first three-way valve F1 and the second three-way valve F2 are connected, and the interfaces 1# and 3# of the third three-way valve F7 and the fourth three-way valve F8 are connected, so as to achieve the cooling of the refrigeration unit by the soil cold source.

[0077] Specifically, in Mode 4, the soil cold source cooling mode of the refrigeration unit, when the temperature of the outdoor air is relatively high and it is impossible to directly use the air cooling energy to cool the data center, and the underground soil cannot directly cool the data center, this operating mode is enabled.

[0078] In this operating mode, the second variable-frequency circulation pump 101, the air cooler 102, the first variable-frequency circulation pump 205 and the compressor 202 are started, the first two-way valve F3 and the fourth two-way valve F6 are opened, the interfaces 1# and 3# of the first three-way valve F1 and the second three-way valve F2 are connected, and the interfaces 1# and 3# of the third three-way valve F7 and the fourth three-way valve F8 are connected.

[0079] The operating principle of the refrigeration cycle subsystem in this operating mode is as follows: The low-temperature and low-pressure gaseous refrigerant inhaled by the compressor 202 is compressed by the compressor 202 into a high-temperature and high-pressure gaseous refrigerant, and then flows into the condenser 201, and releases the latent heat it carries to the circulating working medium, condensing into a high-temperature and high-pressure liquid refrigerant. Then it is throttled by the throttling device 204 to reduce the temperature and pressure, becoming a low-temperature and low-pressure gas-liquid mixed refrigerant, and then enters the evaporator 203 to absorb the heat of the circulating working medium and evaporate into a gas, and finally returns to the compressor 202.

[0080] The operating principle of the soil cold storage / cold release cycle subsystem in this operating mode is as follows: The working medium is driven by the first variable-frequency circulation pump 205 and flows into the condenser 201 of the refrigeration cycle subsystem, absorbs the heat released by the refrigerant and the temperature rises. Then it flows into the buried heat exchange pipe 303 in the underground soil through the 3# and 1# interfaces of the first two-way valve F3 and the first three-way valve, releases heat to the underground soil and the temperature drops. Then it passes through the 1# and 3# interfaces of the second three-way valve F2 and the fourth two-way valve F6, and finally returns to the condenser 201; The working medium circulates according to the above process, absorbs the heat generated by the refrigeration cycle subsystem, and releases this part of heat to the underground soil, realizing the function of dissipating heat for the refrigeration unit; During this process, the underground soil acts as the cold energy source of the refrigeration cycle subsystem.

[0081] Under this operating mode, the operating principle of the cooling cycle subsystem in the data center using the cold energy generated by the refrigeration cycle subsystem to cool the data center is as follows: Driven by the second variable-frequency circulation pump 101, the working medium flows into the evaporator 203 in the refrigeration cycle subsystem successively through the 1# and 3# interfaces of the fourth three-way valve F8. The heat is absorbed by the refrigerant in the evaporator 203 and the temperature drops. Then it flows back into the second variable-frequency circulation pump 101 through the 3# and 1# interfaces of the third three-way valve F7, and finally flows into the air cooler 102 to absorb the heat of the air in the data center, reducing the temperature of the data center and the cabinets. The working medium circulates according to the above process, absorbs the heat of the data center, and releases this part of the heat to the refrigerant in the evaporator 203 of the refrigeration cycle subsystem, ultimately realizing the function of cooling the data center computer room.

[0082] Please refer to the appendix Figure 6 , and also includes the following steps:

[0083] D01. Start the second variable-frequency circulation pump 101, the air cooler 102, the first variable-frequency circulation pump 205, the compressor 202, and the refrigeration cooling tower 206;

[0084] D02. Connect the 1# and 3# interfaces of the third three-way valve F7 and the fourth three-way valve F8, and open the first two-way valve F3, the second two-way valve F4, the third two-way valve F5, and the fourth two-way valve F6, thereby achieving the air-cooled source cooling of the refrigeration unit.

[0085] Specifically, for Mode 5, the air-cooled source cooling mode of the refrigeration unit, when both the outdoor air temperature and the underground soil temperature are relatively high, resulting in the inability to directly utilize the air cold energy and the inability to use the underground soil as a cold source to cool the data center, this operating mode is enabled.

[0086] Under this operating mode, the second variable-frequency circulation pump 101, the air cooler 102, the first variable-frequency circulation pump 205, the compressor 202, and the refrigeration cooling tower 206 are started, the 1# and 3# interfaces of the third three-way valve F7 and the fourth three-way valve F8 are connected, and the first two-way valve F3, the second two-way valve F4, the third two-way valve F5, and the fourth two-way valve F6 are opened.

[0087] The operating principle of the refrigeration cycle subsystem under this operating mode is the same as that of Mode 4, and will not be elaborated here.

[0088] After the working medium circulating in the condenser 201 of the refrigeration cycle subsystem is heated and its temperature rises by the refrigerant, it is driven by the first variable-frequency circulation pump and successively flows through the first two-way valve F3 and the second two-way valve F4 into the refrigeration cooling tower 206, directly contacts the low-temperature air to dissipate heat and the temperature drops, and then flows into the condenser 201 through the third two-way valve F5 and the fourth two-way valve F6.

[0089] The operating principle of the cooling cycle subsystem of the data room using the cold energy generated by the refrigeration cycle subsystem to cool the data center in this operating mode is the same as that of Mode 4, and will not be elaborated here.

[0090] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A data center cooling system based on cross-seasonal soil cold storage, comprising a refrigeration cycle subsystem, a soil cold storage / cold release cycle subsystem, and a data computer room cooling cycle subsystem, characterized in that: The refrigeration cycle subsystem is used to transfer heat through the refrigerant cycle to supply cooling for the data center or utilize the underground soil for heat dissipation; The soil cold storage / cold release cycle subsystem is used to store cold energy in the underground soil, or release the soil cold energy, or dissipate heat for the refrigeration unit, and exchange cold energy with the soil; The data computer room cooling cycle subsystem is used to transfer cold energy to the data computer room through the working medium cycle to cool or dissipate heat from the data computer room.

2. The data center cooling system based on cross-seasonal soil cold storage according to claim 1, wherein: The refrigeration cycle subsystem includes a condenser (201), which is used to cool the high-temperature refrigerant in the refrigeration cycle subsystem. The types of the condenser (201) include shell-and-tube type, brazed plate type, and shell-and-tube type. A compressor (202) and a throttling device (204) are sequentially arranged on one side of the condenser (201). The compressor (202) is used to drive the refrigerant to circulate and compress the low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure gas at the same time. The types of the compressor (202) include scroll type, screw type, piston type, and centrifugal type. The throttling device (204) is used to throttle the high-temperature and high-pressure liquid refrigerant into a low-temperature and low-pressure gas-liquid mixed refrigerant. The types of the throttling device (204) include electronic expansion valve, thermostatic expansion valve, and capillary tube. An evaporator (203) is arranged on one side of the compressor (202) and the throttling device (204). The evaporator (203) is used to cool the circulating working medium in the air cooler of the data computer room. The types of the evaporator (203) include shell-and-tube type, brazed plate type, and shell-and-tube type. An air cooler (102) is connected to one side of the evaporator (203). A first variable-frequency circulation pump (205) and a refrigeration cooling tower (206) are sequentially arranged on the other side of the condenser (201). One side of the first variable-frequency circulation pump (205) is connected to one side of the refrigeration cooling tower (206).

3. The data center cooling system based on cross-seasonal soil cold storage according to claim 1, characterized in that: The soil cold storage / cold release cycle subsystem includes a cold storage working medium circulation pump (301). A cold storage cooling tower (302) is arranged on one side of the cold storage working medium circulation pump (301). The cold storage cooling tower (302) is used to dissipate the waste heat contained in the cold storage circulating working medium to the outdoor air. The other side of the cold storage working medium circulation pump (301) is respectively connected to a buried heat exchange pipe (303) and one side of the refrigeration cooling tower (206) through a first three-way valve (F1). The buried heat exchange pipe (303) is used to store the cold energy contained in the circulating working medium or release the cold energy stored in the soil. One side of the cold storage cooling tower (302) is respectively connected to one side of the buried heat exchange pipe (303) and one side of the air cooler (102) through a second three-way valve (F2).

4. The data center cooling system based on cross-seasonal soil cold storage according to claim 1, wherein: The cooling circulation subsystem of the data machine room includes a second variable-frequency circulation pump (101), an air cooler (102), a first two-way valve (F3), a second two-way valve (F4), a third two-way valve (F5), a fourth two-way valve (F6), a third three-way valve (F7), and a fourth three-way valve (F8). The second variable-frequency circulation pump (101) is arranged on one side of the air cooler (102), and the air cooler (102) is used to release the cold energy contained in the circulating working medium to the data machine room. One side of the first two-way valve (F3) and the second two-way valve (F4) is arranged between the first variable-frequency circulation pump (205) and the refrigeration cooling tower (206). One side of the third two-way valve (F5) and the fourth two-way valve (F6) is arranged between the condenser (201) and the refrigeration cooling tower (206). One side of the third three-way valve (F7) and the fourth three-way valve (F8) is respectively arranged between the evaporator (203) and the air cooler (102).

5. A data center cooling method based on cross-seasonal cold storage in soil, characterized in that Applied to a data center cooling system based on soil seasonal cold storage according to any one of claims 1-4, the method includes the following steps: S1. The cold storage working medium circulation pump (301) and the cold storage cooling tower (302) are started. S2. The interfaces of the first three-way valve (F1) and the second three-way valve (F2) are connected. At the same time, the second variable-frequency circulation pump (101), the refrigeration cooling tower (206), and the air cooler (102) are started, and the fourth two-way valve (F4) and the fifth two-way valve (F5) are opened. S3. The interfaces 1# and 2# of the third three-way valve (F7) and the fourth three-way valve (F8) are connected, so as to achieve soil cold storage combined with direct cooling of the cooling tower.

6. The data center cooling method based on cross-seasonal cold storage in soil according to claim 5, characterized in that: It further includes the following steps: A01. The second variable-frequency circulation pump (101), the refrigeration cooling tower (206), and the air cooler (102) are started. A02. The fourth two-way valve (F4) and the fifth two-way valve (F5) are opened, and the interfaces 1# and 2# of the third three-way valve (F7) and the fourth three-way valve (F8) are connected, so as to achieve direct cooling of the cooling tower.

7. A data center cooling method based on cross-seasonal cold storage in soil according to claim 5, characterized in that: It further includes the following steps: B01. The second variable-frequency circulation pump (101) and the air cooler (102) are started. B02. The interfaces 1# and 3# of the first three-way valve (F1) and the second three-way valve (F2) are connected, and the interfaces 1# and 2# of the third three-way valve (F7) and the fourth three-way valve (F8) are connected, so as to achieve soil cold release for cooling.

8. A data center cooling method based on cross-seasonal cold storage in soil according to claim 5, characterized in that: It further includes the following steps: C01. The second variable-frequency circulation pump (101), the air cooler (102), the first variable-frequency circulation pump (205), and the compressor (202) are started. C02. The first two-way valve (F3) and the fourth two-way valve (F6) are opened. C03. The interfaces 1# and 3# of the first three-way valve (F1) and the second three-way valve (F2) are connected, and the interfaces 1# and 3# of the third three-way valve (F7) and the fourth three-way valve (F8) are connected, so as to achieve cooling with soil cold source of the refrigeration unit.

9. A data center cooling method based on cross-seasonal soil cold storage according to claim 5, characterized in that: It further includes the following steps: D01. The second variable-frequency circulation pump (101), the air cooler (102), the first variable-frequency circulation pump (205), the compressor (202), and the refrigeration cooling tower (206) are started. The interfaces 1# and 3# of the D02, the third three-way valve (F7) and the fourth three-way valve (F8) are connected, and the first two-way valve (F3), the second two-way valve (F4), the third two-way valve (F5) and the fourth two-way valve (F6) are opened, so as to achieve the cooling of the air cooling source of the refrigeration unit.

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