Cold plate side and air side combined refrigerating system

Abstract

According to the cold plate side and air side combined refrigerating system, the cold plate side refrigerating system and the air side refrigerating system are connected through the unified cold water circulating system and hot water circulating system, and flexible conversion and cooperative work between the cold plate side refrigerating system and the air side refrigerating system are achieved. By opening or closing the cold plate side refrigerating system or the air side refrigerating system, the number of the cold plate side refrigerating system and the number of the air side refrigerating system in operation are increased or decreased, the air-liquid ratio can be adjusted according to actual requirements, and the heat dissipation requirements in different service scenes are met. By sharing the cold water circulation system and the hot water circulation system, the problem that each refrigeration device in a traditional system needs an independent cold source is solved, the construction and operation cost of the system is reduced, and the utilization efficiency of energy is improved.

Description

Technical Field

[0001] This application relates to the field of refrigeration system technology, and more specifically, to a combined refrigeration system with a cold plate side and an air side. Background Technology

[0002] Traditional servers typically use air-side cooling systems, while liquid-cooled servers are those that dissipate heat through liquid exchange. They utilize a fluid cooling system to transfer heat generated within the server to the fluid, achieving heat dissipation and cooling. The equipment used for heat exchange in liquid-cooled servers includes cold-plate-side cooling systems and air-side cooling systems. With the continuous upgrading of servers, the required air-to-liquid ratio in data centers needs to be adjusted accordingly, and different brands of servers require different air-to-liquid ratios. Currently, existing servers use separate cooling systems for air-side and cold-plate-side cooling, and the number of these systems is fixed, making it difficult to adjust the air-to-liquid ratio and incompatible with diverse business needs. Utility Model Content

[0003] The purpose of this application is to provide a combined cold plate-side and air-side refrigeration system to solve the problems in existing liquid-cooled servers where the air-side refrigeration equipment and the cold plate-side refrigeration equipment each use a separate cold source system, and the number of air-side refrigeration equipment and cold plate-side refrigeration equipment is fixed, making it difficult to adjust the air-liquid ratio and unable to meet different business needs.

[0004] This application provides a combined cold plate-side and air-side refrigeration system, comprising: at least one refrigeration device, a cold water circulation system, a hot water circulation system, at least one cold plate-side refrigeration system, and at least one air-side refrigeration system.

[0005] The hot water inlet of the refrigeration equipment is connected to the hot water circulation system, and the cold water outlet of the refrigeration equipment is connected to the cold water circulation system.

[0006] The cold water inlet of the air-side refrigeration system is connected to the cold water circulation system, and the hot water outlet of the air-side refrigeration system is connected to the hot water circulation system.

[0007] The cold water inlet of the cold plate side refrigeration system is connected to the cold water circulation system, and the hot water outlet of the cold plate side refrigeration system is connected to the hot water circulation system.

[0008] In the above technical solution, the cold plate-side refrigeration system and the air-side refrigeration system are connected through a unified cold water circulation system and a hot water circulation system, enabling flexible switching and collaborative operation between the two. By turning the cold plate-side refrigeration system or the air-side refrigeration system on or off, and increasing or decreasing the number of operating cold plate-side refrigeration systems and air-side refrigeration systems, the air-liquid ratio can be adjusted according to actual needs to meet the heat dissipation requirements of different business scenarios. By sharing the cold water circulation system and the hot water circulation system, the problem of each refrigeration device requiring an independent cold source in traditional systems is avoided, which not only reduces the system's construction and operation costs but also improves energy utilization efficiency.

[0009] In some alternative implementations, the refrigeration equipment includes: a closed-circuit cooling tower, a cold storage tank, and a water pump;

[0010] The water pump inlet is connected to the hot water circulation system, the water pump outlet is connected to the inlet of the closed cooling tower, the closed cooling tower outlet is connected to the inlet of the cold storage tank, and the cold storage tank outlet is connected to the cold water circulation system.

[0011] In the aforementioned technical solutions, the closed-circuit cooling tower is a heat exchanger that combines the performance of a water-cooled cooler and a conventional cooling tower. Its working principle utilizes the heat absorption during water evaporation to cool the liquid being cooled. In a closed-circuit cooling tower, the circulating water operates in a closed loop, without direct contact with the external environment, thus ensuring the stability and consistency of the circulating medium's composition. Cold storage tanks, as important energy storage devices, play a crucial role in refrigeration systems. They can store cold energy during low-load periods or when electricity prices are low, and then release the cold energy during high-load periods or when electricity prices are high to meet the needs of the refrigeration system. The configuration of cold storage tanks can be flexibly adjusted according to actual needs, including the cold storage capacity and storage time.

[0012] In some alternative implementations, at least two electric valves are provided between the inlet of the water pump and the hot water circulation system;

[0013] At least two electric valves are installed between the outlet of the water pump and the inlet of the closed cooling tower;

[0014] At least two electric valves shall be installed between the outlet of the closed cooling tower and the inlet of the cold storage tank;

[0015] At least two electric valves are installed between the outlet of the cold storage tank and the cold water circulation system.

[0016] In the above technical solution, dual valves are installed between the water pump and the hot water circulation system, between the water pump and the closed cooling tower, between the closed cooling tower and the cold storage tank, and between the cold storage tank and the cold water circulation system. When the water pump, closed cooling tower, or cold storage tank needs to be repaired or replaced, the part to be repaired is isolated from the entire system by closing the two valves, thereby ensuring the safe conduct of the repair work.

[0017] In some alternative implementations, the air-side refrigeration system includes: a chilled water coil, a compressor, an expansion valve, a condenser, and an evaporator;

[0018] Air-side cooling systems are used for:

[0019] Cooling is achieved using chilled water coils;

[0020] And / or, refrigeration is achieved using a compressor, expansion valve, condenser, and evaporator.

[0021] In the above technical solutions, chilled water coils are a common cooling method in air-side refrigeration systems. They utilize low-temperature chilled water flowing within the coil to remove heat from the air through heat exchange, thereby achieving a cooling effect. Chilled water coils have advantages such as simple structure, convenient maintenance, and stable cooling performance.

[0022] The compressor, expansion valve, condenser, and evaporator together constitute the refrigeration cycle in an air-side refrigeration system. The compressor is one of the core components of the refrigeration system; it is responsible for compressing the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas, providing power for the subsequent condensation process. The condenser is another key component of the refrigeration system; it uses cooling water to cool the high-temperature, high-pressure refrigerant gas output from the compressor into a high-pressure liquid, while releasing heat into the environment. The expansion valve regulates the flow and pressure of the refrigerant entering the evaporator to ensure that the refrigerant within the evaporator can fully evaporate and absorb heat. The evaporator is the refrigeration component in the refrigeration system; it uses the evaporation of the refrigerant to absorb heat from the air, thereby lowering the air temperature. In air-side refrigeration systems, the evaporator is usually used in conjunction with a fan to accelerate airflow and enhance the cooling effect.

[0023] In this embodiment, depending on actual needs, the system can flexibly choose to use a chilled water coil for cooling, or activate a compressor, expansion valve, condenser, and evaporator for cooling. This allows the air-side cooling system to be flexibly adjusted according to different application scenarios and cooling requirements, thereby achieving a higher energy efficiency ratio and lower operating costs.

[0024] In some alternative implementations, the compressor includes a variable frequency compressor.

[0025] In the above technical solution, the variable frequency compressor is a compressor that can adjust its speed according to actual needs. Compared with the traditional fixed frequency compressor, the variable frequency compressor adjusts its speed by changing the power supply frequency, thereby achieving precise control of the cooling capacity.

[0026] In some alternative implementations, a dynamic balancing electric regulating valve is installed on the inlet pipe of the chilled water coil to ensure a constant pressure difference between the supply and return water of the chilled water coil.

[0027] In some optional embodiments, when the cooling water temperature at the cold water inlet of the air-side refrigeration system is greater than a preset value, refrigeration is performed using the compressor, expansion valve, condenser, and evaporator; when the cooling water temperature at the cold water inlet of the air-side refrigeration system is less than or equal to the preset value, refrigeration is performed using the cold water coil.

[0028] In the above technical solution, the cooling method is selected based on the comparison between the cooling water temperature and the preset value. When the cooling water temperature is high, a compressor refrigeration cycle is used, which can quickly and effectively reduce the temperature; when the cooling water temperature is low, a chilled water coil is used for cooling to reduce energy consumption.

[0029] In some alternative implementations, the preset value is less than the supply air temperature of the air-side cooling system.

[0030] In some optional implementations, there are N1 wind-side refrigeration systems, N2 cold plate-side refrigeration systems, and N3 refrigeration equipment;

[0031] Where N1 is the sum of the design quantity and the spare quantity of the air-side refrigeration system, N2 is the design quantity of the cold plate-side refrigeration system plus 1, and N3 is the design quantity of the refrigeration equipment plus 1.

[0032] In the above technical solution, the N1 air-side refrigeration systems include the sum of the designed quantity and the backup quantity, ensuring that even if some systems fail or require maintenance, sufficient cooling capacity is maintained and the overall system operation is not affected. The N2 cold plate-side refrigeration systems, with the designed quantity increased by one, provide additional redundancy, enhancing the system's reliability and stability. Similarly, the N3 refrigeration units, with the designed quantity increased by one, also provide redundancy, ensuring the system can continuously provide cooling services during equipment failures or maintenance.

[0033] In some alternative implementations,

[0034] At least two electric valves shall be installed between the chilled water inlet of the air-side refrigeration system and the chilled water circulation system.

[0035] At least two electric valves shall be installed between the hot water outlet of the air-side refrigeration system and the hot water circulation system.

[0036] At least two electric valves are installed between the chilled water inlet of the cold plate side refrigeration system and the chilled water circulation system;

[0037] At least two electric valves are installed between the hot water outlet of the refrigeration system on the cold plate side and the hot water circulation system.

[0038] In the above technical solution, double valves are installed on both sides of the refrigeration equipment, double valves are installed on both sides of the air-side refrigeration system, and double valves are also installed on both sides of the cold plate-side refrigeration system. When the refrigeration equipment, air-side refrigeration system, or cold plate-side refrigeration system needs to be repaired or replaced, the part to be repaired is isolated from the entire system by closing the two valves, thereby ensuring the safe conduct of the repair work.

[0039] In some alternative implementations, the refrigeration equipment, the cold plate-side refrigeration system, and the air-side refrigeration system all adopt a power distribution method of one uninterruptible power supply and one mains power supply.

[0040] In the above technical solution, by adopting a power distribution method of one UPS and one mains power, the system achieves dual power backup. Even if the mains power fails, the UPS can immediately take over the power supply to ensure the continuous operation of the cooling system, thereby improving the overall reliability of the system. Attached Figure Description

[0041] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 A schematic diagram of a combined cold plate-side and air-side refrigeration system provided in this application embodiment;

[0043] Figure 2 A schematic diagram of the cooling water flow direction of the combined refrigeration system on the cold plate side and the air side provided in the embodiments of this application. Detailed Implementation

[0044] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0045] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of a combined cold plate and air-side refrigeration system provided in an embodiment of this application. Figure 2 A schematic diagram of the cooling water flow direction of the combined refrigeration system on the cold plate side and the air side provided in the embodiments of this application.

[0046] The system includes: at least one refrigeration unit, a chilled water circulation system, a hot water circulation system, at least one cold plate-side refrigeration system (CDU), and at least one air-side refrigeration system (CRAH).

[0047] Specifically, the hot water inlet of the refrigeration equipment is connected to the hot water circulation system, and the cold water outlet of the refrigeration equipment is connected to the cold water circulation system; the cold water inlet of the air-side refrigeration system is connected to the cold water circulation system, and the hot water outlet of the air-side refrigeration system is connected to the hot water circulation system; the cold water inlet of the cold plate-side refrigeration system is connected to the cold water circulation system, and the hot water outlet of the cold plate-side refrigeration system is connected to the hot water circulation system. Specifically, the air-side refrigeration system can be a dual-coil precision air conditioner with a cooling water coil.

[0048] In the above technical solution, the cold plate-side refrigeration system and the air-side refrigeration system are connected through a unified cold water circulation system and a hot water circulation system, enabling flexible switching and collaborative operation between the two. By turning the cold plate-side refrigeration system or the air-side refrigeration system on or off, and increasing or decreasing the number of operating cold plate-side refrigeration systems and air-side refrigeration systems, the air-liquid ratio can be adjusted according to actual needs to meet the heat dissipation requirements of different business scenarios. By sharing the cold water circulation system and the hot water circulation system, the problem of each refrigeration device requiring an independent cold source in traditional systems is avoided, which not only reduces the system's construction and operation costs but also improves energy utilization efficiency.

[0049] In some alternative implementations, the refrigeration equipment includes: a closed-circuit cooling tower, a cold storage tank, and a water pump; the inlet of the water pump is connected to a hot water circulation system, the outlet of the water pump is connected to the inlet of the closed-circuit cooling tower, the outlet of the closed-circuit cooling tower is connected to the inlet of the cold storage tank, and the outlet of the cold storage tank is connected to a cold water circulation system.

[0050] In the aforementioned technical solutions, the closed-circuit cooling tower is a heat exchanger that combines the performance of a water-cooled cooler and a conventional cooling tower. Its working principle utilizes the heat absorption during water evaporation to cool the liquid being cooled. In a closed-circuit cooling tower, the circulating water operates in a closed loop, without direct contact with the external environment, thus ensuring the stability and consistency of the circulating medium's composition. Cold storage tanks, as important energy storage devices, play a crucial role in refrigeration systems. They can store cold energy during low-load periods or when electricity prices are low, and then release the cold energy during high-load periods or when electricity prices are high to meet the needs of the refrigeration system. The configuration of cold storage tanks can be flexibly adjusted according to actual needs, including the cold storage capacity and storage time.

[0051] In some alternative implementations, at least two electric valves are provided between the inlet of the water pump and the hot water circulation system; at least two electric valves are provided between the outlet of the water pump and the inlet of the closed cooling tower; at least two electric valves are provided between the outlet of the closed cooling tower and the inlet of the cold storage tank; and at least two electric valves are provided between the outlet of the cold storage tank and the cold water circulation system.

[0052] In the above technical solution, dual valves are installed between the water pump and the hot water circulation system, between the water pump and the closed cooling tower, between the closed cooling tower and the cold storage tank, and between the cold storage tank and the cold water circulation system. When the water pump, closed cooling tower, or cold storage tank needs to be repaired or replaced, the part to be repaired is isolated from the entire system by closing the two valves, thereby ensuring the safe conduct of the repair work.

[0053] In some alternative implementations, the air-side refrigeration system includes: a chilled water coil, a compressor, an expansion valve, a condenser, and an evaporator; the air-side refrigeration system is used for: refrigeration using the chilled water coil, and / or refrigeration using the compressor, expansion valve, condenser, and evaporator.

[0054] In the above technical solutions, chilled water coils are a common cooling method in air-side refrigeration systems. They utilize low-temperature chilled water flowing within the coil to remove heat from the air through heat exchange, thereby achieving a cooling effect. Chilled water coils have advantages such as simple structure, convenient maintenance, and stable cooling performance.

[0055] The compressor, expansion valve, condenser, and evaporator together constitute the refrigeration cycle in an air-side refrigeration system. The compressor is one of the core components of the refrigeration system; it is responsible for compressing the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas, providing power for the subsequent condensation process. The condenser is another key component of the refrigeration system; it uses cooling water to cool the high-temperature, high-pressure refrigerant gas output from the compressor into a high-pressure liquid, while releasing heat into the environment. The expansion valve regulates the flow and pressure of the refrigerant entering the evaporator to ensure that the refrigerant within the evaporator can fully evaporate and absorb heat. The evaporator is the refrigeration component in the refrigeration system; it uses the evaporation of the refrigerant to absorb heat from the air, thereby lowering the air temperature. In air-side refrigeration systems, the evaporator is usually used in conjunction with a fan to accelerate airflow and enhance the cooling effect.

[0056] In this embodiment, the cooling system can be flexibly adjusted according to actual needs, either by using a chilled water coil or by using a compressor, expansion valve, condenser, and evaporator. This allows the air-side cooling system to be flexibly adjusted according to different application scenarios and cooling requirements, thereby achieving a higher energy efficiency ratio and lower operating costs.

[0057] In some alternative implementations, the compressor includes a variable frequency compressor.

[0058] In the above technical solution, the variable frequency compressor is a compressor that can adjust its speed according to actual needs. Compared with the traditional fixed frequency compressor, the variable frequency compressor adjusts its speed by changing the power supply frequency, thereby achieving precise control of the cooling capacity.

[0059] In some alternative implementations, when the cooling water temperature of the air-side refrigeration system is greater than a preset value, refrigeration is performed using a compressor, expansion valve, condenser, and evaporator; when the cooling water temperature is less than or equal to the preset value, refrigeration is performed using a chilled water coil.

[0060] In the above technical solution, the cooling method is selected based on the comparison between the cooling water temperature and a preset value. This includes: manual switching control, automatic control via a controller comparing the cooling water temperature with the preset value, or outputting a level signal to the corresponding module via a logic circuit after comparing the cooling water temperature with the preset value to control the corresponding module to turn on or off. When the cooling water temperature is high, a compressor refrigeration cycle is used, which can quickly and effectively reduce the temperature; when the cooling water temperature is low, a chilled water coil is used for cooling to reduce energy consumption.

[0061] The preset value is lower than the supply air temperature of the air-side cooling system.

[0062] In some optional implementations, there are N1 wind-side refrigeration systems, N2 cold plate-side refrigeration systems, and N3 refrigeration equipment; wherein, N1 is the sum of the designed number and the spare number of wind-side refrigeration systems, N2 is the designed number of cold plate-side refrigeration systems plus 1, and N3 is the designed number of refrigeration equipment plus 1.

[0063] In the above technical solution, the N1 air-side refrigeration systems include the sum of the designed quantity and the backup quantity, ensuring that even if some systems fail or require maintenance, sufficient cooling capacity is maintained and the overall system operation is not affected. The N2 cold plate-side refrigeration systems, with the designed quantity increased by one, provide additional redundancy, enhancing the system's reliability and stability. Similarly, the N3 refrigeration units, with the designed quantity increased by one, also provide redundancy, ensuring the system can continuously provide cooling services during equipment failures or maintenance.

[0064] In some alternative implementations, at least two electric valves are provided between the cold water inlet of the air-side refrigeration system and the cold water circulation system; at least two electric valves are provided between the hot water outlet of the air-side refrigeration system and the hot water circulation system; at least two electric valves are provided between the cold water inlet of the cold plate-side refrigeration system and the cold water circulation system; and at least two electric valves are provided between the hot water outlet of the cold plate-side refrigeration system and the hot water circulation system.

[0065] In the above technical solution, the air-side refrigeration system is equipped with double valves for isolation on both sides, and the cold plate-side refrigeration system is also equipped with double valves for isolation on both sides. When the air-side refrigeration system or the cold plate-side refrigeration system needs to be repaired or replaced, the part to be repaired is isolated from the whole system by closing the two valves, thereby ensuring the safe conduct of the repair work.

[0066] In some alternative implementations, the refrigeration equipment, the cold plate-side refrigeration system, and the air-side refrigeration system all adopt a power distribution method of one uninterruptible power supply and one mains power supply.

[0067] In the above technical solution, by adopting a power distribution method of one UPS and one mains power, the system achieves dual power backup. Even if the mains power fails, the UPS can immediately take over the power supply to ensure the continuous operation of the cooling system, thereby improving the overall reliability of the system.

[0068] The control principles of the combined refrigeration system in this embodiment specifically include:

[0069] Control principles of the cold plate side refrigeration system:

[0070] 1. The frequency of the closed cooling tower is controlled based on the temperature of the cooling water in the lower tower. The temperature of the cooling tower is determined based on the outdoor wet-bulb temperature and the minimum approach.

[0071] 2. The operating frequency of the cooling water pump is controlled based on the pressure difference at the most unfavorable point in the primary loop of the cold plate side refrigeration system and the cooling water loop of the air side refrigeration system. The most unfavorable point sensors are respectively arranged at the most unfavorable points in the cooling water loops of the cold plate side refrigeration system and the air side refrigeration system to ensure that the pressure difference control requirements at the most unfavorable points are met.

[0072] 3. The refrigeration system on the cold plate side controls the secondary side liquid supply temperature by adjusting the opening of the water valve. The water pump built into the refrigeration system on the cold plate side regulates the flow rate of the liquid-cooled secondary side water supply by adjusting the constant pressure difference at the most unfavorable point at the end.

[0073] Control principles for air-side cooling systems:

[0074] 1. When using a variable frequency compressor, expansion valve, condenser and evaporator for refrigeration, the operating status of the variable frequency compressor is controlled according to the set air supply temperature.

[0075] 2. During transitional seasons and winter conditions, the operating conditions of the air-side refrigeration system are determined based on the temperature of the water at the bottom of the cooling tower. When the temperature of the water at the bottom of the cooling tower is lower than the critical temperature for natural cooling of the chilled water coil (e.g., if the designed air supply temperature is 30℃, the critical temperature can be set to 24℃), the variable frequency compressor, expansion valve, condenser, and evaporator are shut down, and the chilled water coil is switched to provide cooling.

[0076] 3. To ensure hydraulic balance after mode switching, a dynamic balancing electric regulating valve is installed on the inlet pipe of the chilled water coil to ensure a constant pressure difference between the supply and return water of the chilled water coil.

[0077] 4. When the cooling water temperature (outlet water temperature) rises above the critical temperature for natural cooling of the chilled water coil, the system switches to a mode that uses a variable frequency compressor, expansion valve, condenser, and evaporator for refrigeration to ensure the safety of liquid-cooled air-side refrigeration. The cold storage tank in the refrigeration equipment is set to operate online, which can effectively ensure the continuity and reliability of the air-side refrigeration system mode adjustment.

[0078] Refrigeration equipment control principles:

[0079] 1. The cooling water tower temperature (outlet water temperature) is determined by the outdoor wet-bulb temperature. The goal is to obtain the lowest possible outlet water temperature. The refrigeration equipment is centrally controlled and supports hot standby operation when necessary. This means that all cooling towers and cooling water circulation pumps are turned on to pursue the lowest possible approach to obtain the lowest possible cooling water temperature, so as to ensure that the air-side refrigeration system has good energy efficiency.

[0080] 2. The operating frequency of the cooling water pump is controlled based on the pressure difference at the most unfavorable point in the primary loop of the refrigeration system on the cold plate side and the cooling water loop of the refrigeration system on the air side.

[0081] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0082] Furthermore, the units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0083] Furthermore, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0084] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations.

[0085] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A combined cold plate side and air side refrigeration system, characterized by, Comprising: at least one refrigeration device, a cold water circulation system, a hot water circulation system, at least one cold plate side refrigeration system, and at least one air side refrigeration system; a hot water inlet of the refrigeration device is connected to the hot water circulation system, and a cold water outlet of the refrigeration device is connected to the cold water circulation system; a cold water inlet of the air side refrigeration system is connected to the cold water circulation system, and a hot water outlet of the air side refrigeration system is connected to the hot water circulation system; a cold water inlet of the cold plate side refrigeration system is connected to the cold water circulation system, and a hot water outlet of the cold plate side refrigeration system is connected to the hot water circulation system; the refrigeration device comprises a closed cooling tower, a cold storage tank, and a water pump, an outlet of the closed cooling tower is connected to an inlet of the cold storage tank, and an outlet of the cold storage tank is connected to the cold water circulation system.

2. The cold plate and airside combined refrigeration system of claim 1, wherein ； an inlet of the water pump is connected to the hot water circulation system, and an outlet of the water pump is connected to an inlet of the closed cooling tower.

3. The cold plate and airside combined refrigeration system of claim 2, wherein, at least two electric valves are arranged between the inlet of the water pump and the hot water circulation system; at least two electric valves are arranged between the outlet of the water pump and the inlet of the closed cooling tower; at least two electric valves are arranged between the outlet of the closed cooling tower and the inlet of the cold storage tank; at least two electric valves are arranged between the outlet of the cold storage tank and the cold water circulation system.

4. The cold plate and airside combined refrigeration system of claim 1, wherein, the air side refrigeration system comprises a cold water coil, a compressor, an expansion valve, a condenser, and an evaporator; the air side refrigeration system is used for: refrigeration by the cold water coil, and / or refrigeration by the compressor, the expansion valve, the condenser, and the evaporator.

5. The cold plate and airside combined refrigeration system of claim 4, wherein, a dynamic balance electric regulating valve is arranged on a cold water coil water inlet pipe.

6. The cold plate and airside combined refrigeration system of claim 4, wherein, in a case where a cooling water temperature at a cold water inlet of the air side refrigeration system is greater than a preset value, refrigeration is performed by the compressor, the expansion valve, the condenser, and the evaporator; in a case where the cooling water temperature at the cold water inlet of the air side refrigeration system is less than or equal to the preset value, refrigeration is performed by the cold water coil.

7. The cold plate and airside combined refrigeration system of claim 6, wherein, wherein, the preset value is less than a supply air temperature of the air side refrigeration system.

8. The cold plate and airside combined refrigeration system of claim 1, wherein, comprising N1 air side refrigeration systems, N2 cold plate side refrigeration systems, and N3 refrigeration devices; wherein, N1 is a sum of a design quantity and a standby quantity of the air side refrigeration systems, N2 is a design quantity plus 1 of the cold plate side refrigeration systems, and N3 is a design quantity plus 1 of the refrigeration devices.

9. The cold plate side and air side combined refrigeration system according to claim 1, wherein, at least two electric valves are arranged between a cold water inlet of the air side refrigeration system and the cold water circulation system; at least two electric valves are arranged between a hot water outlet of the air side refrigeration system and the hot water circulation system; at least two electric valves are arranged between a cold water inlet of the cold plate side refrigeration system and the cold water circulation system; at least two electric valves are arranged between a hot water outlet of the cold plate side refrigeration system and the hot water circulation system.

10. The cold plate and airside combined refrigeration system of claim 1, wherein, the refrigeration device, the cold plate side refrigeration system, and the air side refrigeration system all adopt a power distribution mode of 1 uninterruptible power supply and 1 commercial power supply.

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