Multi-mode data center cooling system

Abstract

The invention relates to the technical field of air conditioners, in particular to a multi-mode data center cooling system which comprises a spraying assembly, a filler assembly, a water tank assembly, a surface air cooler, a first heat exchanger, a first heat exchange coil pipe, a second heat exchange coil pipe and a refrigeration assembly. The first heat exchanger comprises a first heat exchange channel and a second heat exchange channel; and the spraying assembly, the filling assembly and the water tank assembly are correspondingly arranged. The system has multiple working modes, intelligent switching of the multiple working modes can be carried out, the natural cooling use time can be prolonged, reasonable switching can be carried out according to different environment temperatures, seasonal changes and other factors, then the annual operation power of a unit is reduced, energy consumption is reduced, and the energy utilization efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning, in particular to a multi-mode data center cooling system. BACKGROUND

[0002] In the operation process of a data center, a large amount of heat is continuously generated by core hardware such as servers and storage devices. If the heat cannot be effectively discharged in time, the operating temperature of the equipment will rise, which will not only reduce the data processing efficiency and shorten the service life of the hardware, but also cause the equipment to be down and cause data loss or business interruption. Therefore, the cooling system is a key infrastructure to ensure the stable operation of the data center.

[0003] The current mainstream data center cooling system mainly adopts a single or fixed combination of cooling modes. For example, the traditional air-cooled cooling system relies on air conditioning units for forced refrigeration, and heat exchange between the refrigerant cycle and indoor air to achieve cooling. This mode needs to be continuously operated at full load in high-temperature environments (such as summer), and the power consumption of the refrigeration components is extremely high, resulting in a large annual operating power of the data center and serious energy consumption, which does not meet the current green and low-carbon development needs. For example, some natural cooling systems can use outdoor low-temperature air to exchange heat and reduce the starting frequency of the refrigeration components, but due to the environmental temperature conditions, they can only work in low-temperature seasons (such as winter). When the environmental temperature is higher than the preset threshold, it needs to be completely switched to mechanical refrigeration mode. The natural cooling time is short and cannot fully adapt to the cooling needs of the data center in different seasons and different environmental temperatures.

[0004] In addition, the existing cooling system does not optimize the design of different heat exchange links, resulting in insufficient heat and mass exchange between outdoor air and cooling medium, or low temperature control accuracy of cooling water in the circulation process, further increasing the additional load of the refrigeration components. SUMMARY

[0005] The purpose of the present application is to overcome the above-mentioned deficiencies in the prior art and provide a multi-mode data center cooling system.

[0006] The purpose of the present application is achieved by the following technical solution: a multi-mode data center cooling system, comprising a spraying assembly, a filler assembly, a water tank assembly, a surface air cooler, a first heat exchanger, a first heat exchange coil, a second heat exchange coil and a refrigeration component; the first heat exchanger comprises a first heat exchange channel and a second heat exchange channel; the spraying assembly, the filler assembly and the water tank assembly are correspondingly arranged; One end of the first heat exchange channel is communicated with one end of the first heat exchange coil; the other end of the first heat exchange channel is communicated with the other end of the first heat exchange coil after heat exchange with the refrigeration assembly; one end of the first heat exchange channel is communicated with one end of the cooling pad; the other end of the first heat exchange channel is communicated with the other end of the cooling pad; one end of the second heat exchange channel is communicated with the spraying assembly; the other end of the second heat exchange channel is communicated with the water tank assembly; the water tank assembly is communicated with the spraying assembly after heat exchange with the refrigeration assembly; one end of the second heat exchange coil is communicated with one end of the cooling pad; the other end of the second heat exchange coil is communicated with the other end of the cooling pad; the second heat exchange coil is arranged in the water tank assembly.

[0007] The application is further provided that the refrigeration assembly comprises a second heat exchanger and a third heat exchanger; the second heat exchanger comprises a third heat exchange channel and a fourth heat exchange channel; the third heat exchanger comprises a fifth heat exchange channel and a sixth heat exchange channel; one end of the third heat exchange channel is communicated with the other end of the first heat exchange channel; the other end of the third heat exchange channel is communicated with the other end of the first heat exchange coil; one end of the fourth heat exchange channel is communicated with one end of the fifth heat exchange channel; the other end of the fourth heat exchange channel is communicated with the other end of the fifth heat exchange channel; one end of the sixth heat exchange channel is communicated with the water tank assembly; the other end of the sixth heat exchange channel is communicated with the spraying assembly.

[0008] The application is further provided that the refrigeration assembly further comprises a compressor arranged between one end of the fourth heat exchange channel and one end of the fifth heat exchange channel and an expansion valve arranged between the other end of the fourth heat exchange channel and the other end of the fifth heat exchange channel.

[0009] The application is further provided that the spraying assembly comprises a first spraying pipe and a second spraying pipe; the filler assembly comprises a first filler and a second filler; the water tank assembly comprises a first water tank and a second water tank; the first spraying pipe, the first filler and the first water tank are correspondingly arranged; the second spraying pipe, the second filler and the second water tank are correspondingly arranged; one end of the second heat exchange channel is communicated with the second spraying pipe; the first water tank is communicated with the second spraying pipe after heat exchange with the refrigeration assembly; the other end of the second heat exchange channel is communicated with the first water tank; the second water tank is communicated with the first spraying pipe.

[0010] The application is further provided that the second heat exchange coil is arranged in the first water tank.

[0011] The application is further provided that the multi-mode data center cooling system further comprises an air inlet and an air outlet; the cooling pad, the first filler and the second filler are all arranged between the air inlet and the air outlet; the first filler is arranged between the cooling pad and the second filler; the cooling pad is arranged at one end close to the air inlet; the second filler is arranged at one end close to the air outlet.

[0012] The application is further provided with a fan at the second spray pipe.

[0013] The application is further provided with a first bypass pipe between one end of the first heat exchange channel and the other end of the first heat exchange channel; the first bypass pipe is provided with a first bypass valve; a second bypass pipe is provided between one end of the third heat exchange channel and the other end of the third heat exchange channel; the second bypass pipe is provided with a second bypass valve; a first control valve is provided between one end of the first heat exchange channel and one end of the surface cooler; a second control valve is provided between the other end of the first heat exchange channel and the other end of the surface cooler; a third control valve is provided between one end of the surface cooler and one end of the second heat exchange coil; a first circulating pump is provided between one end of the first heat exchange channel and one end of the first heat exchange coil; a fourth control valve and a second circulating pump are provided between the other end of the surface cooler and the other end of the second heat exchange coil.

[0014] The application is further provided with a third circulating pump; the water tank assembly is in communication with the other end of the second heat exchange channel and one end of the sixth heat exchange channel through the third circulating pump; One end of the third circulating pump is in communication with the water tank assembly; a fifth control valve is provided between the other end of the third circulating pump and the other end of the second heat exchange channel; a sixth control valve is provided between the other end of the third circulating pump and one end of the sixth heat exchange channel.

[0015] The application is further provided with a fourth circulating pump between the second water tank and the first spray pipe.

[0016] The application has multiple working modes, can intelligently switch between multiple working modes, can increase the natural cooling use time, can reasonably switch according to different environmental temperatures, seasonal changes and other factors, and can reduce the annual operation power of the unit, reduce energy consumption, and improve energy utilization efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] The application is further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the application, and other drawings can be obtained by those skilled in the art without creative labor on the premise of not paying creative labor.

[0018] Figure 1 is a system schematic diagram of the application; Figure 2 is a system schematic diagram when the first working mode; Figure 3 is a system schematic diagram when the second working mode; Figure 4 is a system schematic diagram when the third working mode; Wherein: 11, the surface condenser; 12, the second heat exchange coil; 13, the third control valve; 14, the fourth control valve; 15, the second circulating pump; 2, the first heat exchanger; 21, the first heat exchange channel; 22, the second heat exchange channel; 23, the first control valve; 24, the second control valve; 3, the first heat exchange coil; 31, the first circulating pump; 41, the second heat exchanger; 42, the third heat exchange channel; 43, the fourth heat exchange channel; 44, the third heat exchanger; 45, the fifth heat exchange channel; 46, the sixth heat exchange channel; 47, the compressor; 48, the expansion valve; 51, the first spray pipe; 52, the second spray pipe; 61, the first filler; 62, the second filler; 71, the first water tank; 72, the second water tank; 73, the third circulating pump; 74, the fifth control valve; 75, the sixth control valve; 76, the fourth circulating pump; 81, the air inlet; 82, the air outlet; 83, the fan; 91, the first bypass pipe; 92, the first bypass valve; 93, the second bypass pipe; 94, the second bypass valve. DETAILED DESCRIPTION

[0019] The application will be further described in conjunction with the following examples.

[0020] From Figure 1 It can be known that the multi-mode data center cooling system comprises a spray assembly, a filler assembly, a water tank assembly, a surface condenser 11, a first heat exchanger 2, a first heat exchange coil 3, a second heat exchange coil 12 and a refrigeration assembly; the first heat exchanger 2 comprises a first heat exchange channel 21 and a second heat exchange channel 22; the spray assembly, the filler assembly and the water tank assembly are correspondingly arranged; One end of the first heat exchange channel 21 is communicated with one end of the first heat exchange coil 3; the other end of the first heat exchange channel 21 is communicated with the other end of the first heat exchange coil 3 after heat exchange with the refrigeration assembly; one end of the first heat exchange channel 21 is communicated with one end of the surface condenser 11; the other end of the first heat exchange channel 21 is communicated with the other end of the surface condenser 11; one end of the second heat exchange channel 22 is communicated with the spray assembly; the other end of the second heat exchange channel 22 is communicated with the water tank assembly; the water tank assembly is communicated with the spray assembly after heat exchange with the refrigeration assembly; one end of the second heat exchange coil 12 is communicated with one end of the surface condenser 11; the other end of the second heat exchange coil 12 is communicated with the other end of the surface condenser 11; the second heat exchange coil 12 is arranged in the water tank assembly.

[0021] Specifically, the multi-mode data center cooling system has multiple working modes. As Figure 2As shown, the first working mode is as follows: when the ambient temperature exceeds the preset upper limit, the connection between the first heat exchange channel 21 and the first heat exchange coil 3 is disconnected, the connection between the first heat exchange channel 21 and the surface cooler 11 is disconnected, the connection between the surface cooler 11 and the second heat exchange coil 12 is disconnected, and the connection between the second heat exchange channel 22 and the water tank assembly and the spray assembly is also disconnected. In this working mode, a small portion of the return water from the first heat exchange coil 3 in the computer room first passes through the surface cooler 11, where the outdoor high-temperature air is cooled by the surface cooler 11. Then, it enters the packing assembly through the air duct, where it undergoes heat and mass exchange with the cooling water, and is then discharged into the atmosphere. Although using the computer room return water will lead to… The power consumption of the chiller (i.e., the refrigeration assembly including compressor 47, second heat exchanger 41, third heat exchanger 44 and expansion valve 48) increases, but because the heat exchange effect of the surface cooler 11 is obvious and the cooling water temperature is low, the power consumption of the chiller can be reduced, thus offsetting the power consumption of the two components. The cooling water from the water tank assembly exchanges heat with the refrigeration assembly, and then sprays onto the packing assembly, where it undergoes an evaporative cooling heat transfer process with the air before flowing back into the water tank assembly. In addition, part of the return water from the computer room exchanges heat with the surface cooler 11, and the water temperature rises. It mixes with the remaining return water from the computer room and exchanges heat with the refrigeration assembly to obtain the required water temperature for the computer room, and finally sends it into the first heat exchange coil 3 in the computer room.

[0022] like Figure 3 As shown, the second working mode is as follows: when the ambient temperature is between the preset upper limit and the preset lower limit, the connection between the first heat exchange channel 21 and the surface cooler 11 is disconnected; in this working mode, the second heat exchange coil 12 in the water tank assembly is cooled by the water in the water tank assembly and then sent to the surface cooler 11. The outdoor medium-temperature air is cooled by the surface cooler 11, and then enters the packing assembly through the air duct, where it exchanges heat and mass with the cooling water, and then is discharged into the atmosphere. By using the second heat exchange coil 12 in the water tank assembly for heat exchange, it can achieve the desired effect. This effectively reduces the power consumption of the chiller and lowers the PUE value of the computer room. The cooling water from the water tank assembly is divided into two paths. One path enters the second heat exchange channel 22, where it exchanges heat with the computer room return water and is heated. Then, it is sprayed onto the packing assembly through the spray assembly, cooled, and flows into the water tank assembly. The other path of the cooling water from the water tank assembly exchanges heat with the refrigeration assembly. The computer room return water is pre-cooled after passing through the first heat exchange channel 21, and its temperature is lowered. It then exchanges heat with the refrigeration assembly to obtain the required water temperature for the computer room and is finally sent to the first heat exchange coil 3 in the computer room.

[0023] like Figure 4As shown, the third working mode is as follows: when the ambient temperature is less than the preset lower limit value, the entire refrigeration assembly is bypassed; in this working mode, the second heat exchange coil 12 in the water tank assembly is heated by the water in the water tank assembly, and then mixed with part of the room return water and sent to the cooling coil 11, the outdoor low-temperature air is heated by the cooling coil 11, the temperature is increased, and then after entering the filler assembly and exchanging heat with the cooling water, it is discharged into the atmosphere; the cooling water discharged from the water tank assembly exchanges heat with the room return water through the second heat exchange channel 22, and then is sprayed onto the filler assembly through the spraying assembly, and then exchanges heat with the air through the evaporation cooling process, and finally flows into the water tank assembly.

[0024] The embodiment has multiple working modes, can intelligently switch between multiple working modes, can increase the natural cooling time, can reasonably switch according to different environmental temperatures, seasonal changes and other factors, can reduce the annual operating power of the unit, can reduce energy consumption, and can improve energy utilization efficiency; and in the summer working condition, the cooling coil 11 takes the room return water, because the room return water temperature is relatively stable and generally at 30°C, can precool the outdoor high-temperature air in summer, compared with the water (summer working condition water temperature is higher) taken by the second heat exchange coil 12 in the water tank assembly, the inlet water temperature is lower, the cooling coil 11 air outlet temperature is more obvious, the air temperature is lower, and the cooling water machine power consumption is reduced; in addition, in the winter working condition, the cooling coil 11 takes the water of the second heat exchange coil 12 in the water tank assembly (the water temperature in the winter working condition is higher than the outdoor low-temperature air), the ambient air is heated by the cooling coil 11 to a temperature above 0°C, so that the air inlet of the filler assembly does not produce ice curtain, which affects the overall air inlet effect; if the temperature reaches the extremely cold working condition, only the water of the second heat exchange coil 12 in the water tank assembly can reduce the overall air volume to make the temperature at the air inlet of the filler assembly above 0°C, and the overall heat exchange capacity will be reduced, at this time, part of the room return water can be introduced to the cooling coil 11, on the one hand, the room return water temperature is reduced, on the other hand, the air inlet temperature of the filler assembly is heated to above 0°C, preventing the water tank assembly from freezing, double protection, and meeting the winter anti-freezing function of the unit.

[0025] The multi-mode data center cooling system comprises a refrigeration assembly, a water tank assembly, a filler assembly, a spray assembly and a second heat exchange channel. The refrigeration assembly comprises a first heat exchange channel 21, a first heat exchange coil 3, a second heat exchange channel 22, a third heat exchange channel 42 and a fourth heat exchange channel 43. The first heat exchange channel 21 is connected with the first heat exchange coil 3. The second heat exchange channel 22 is connected with the third heat exchange channel 42 and the fourth heat exchange channel 43. The third heat exchange channel 42 is connected with the first heat exchange channel 21. The fourth heat exchange channel 43 is connected with the third heat exchange channel 42. The water tank assembly comprises a first water tank 71 and a second water tank 72. The filler assembly comprises a first filler 61 and a second filler 62. The spray assembly comprises a first spray pipe 51 and a second spray pipe 52. The first spray pipe 51, the first filler 61 and the first water tank 71 are arranged correspondingly. The second spray pipe 52, the second filler 62 and the second water tank 72 are arranged correspondingly. One end of the second heat exchange channel 22 is connected with the second spray pipe 52. The first water tank 71 is connected with the second spray pipe 52 after heat exchange with the refrigeration assembly. The other end of the second heat exchange channel 22 is connected with the first water tank 71. The second water tank 72 is connected with the first spray pipe 51.

[0026] As Figure 2As shown, the first working mode is as follows: when the ambient temperature is greater than the preset upper limit value, disconnect the connection between the first heat exchange channel 21 and the first heat exchange coil 3, disconnect the connection between the first heat exchange channel 21 and the cooling pad 11, and disconnect the connection between the second heat exchange channel 22 and the first water tank 71 and the second spray pipe 52, respectively; in this working mode, a part of the return water of the first heat exchange coil 3 in the machine room first passes through the cooling pad 11, the outdoor high-temperature air is cooled after heat exchange with the cooling pad 11, then enters the first filler 61 to exchange heat with the cooling water of the first filler 61, and then enters the second filler 62, and finally is discharged into the atmosphere through the fan 83. Because the return water of the machine room is slightly warmed after the cooling pad 11 cools the outdoor high-temperature air, more work needs to be done by the water chiller (i.e., the refrigeration assembly including the compressor 47, the second heat exchanger 41, the third heat exchanger 44, and the expansion valve 48) to compensate, which will increase the power consumption of the water chiller. However, because the cooling pad 11 has obvious heat exchange effect, the cooling pad 11 exchanges heat with the outdoor high-temperature ambient air, so that the dry-bulb temperature and the wet-bulb temperature of the air after passing through the cooling pad 11 are both lowered, and the outlet water theoretical value after passing through the filler assembly changes from the ambient wet-bulb temperature to the lower wet-bulb temperature of the air after being cooled by the cooling pad 11, thereby reducing the outlet water temperature of the first water tank 71. The cooling water of the first water tank 71 is simultaneously cooled by the sixth heat exchange channel 46 for the fifth heat exchange channel 45 of the third heat exchanger 44 of the water chiller, i.e., the condensing temperature of the water chiller is lowered, so that the condensing pressure and the evaporation pressure of the water chiller on the psychrometric chart are both lowered, i.e., the increased part of the power consumption of the compressor 47 can be offset by each other. After the cooling water of the first water tank 71 is heated by the sixth heat exchange channel 46 and the fifth heat exchange channel 45, it is first sprayed onto the second filler 62 through the second spray pipe 52, and then flows into the second water tank 72, and finally flows into the first water tank 71 after being sprayed onto the first filler 61 through the first spray pipe 51 to perform a two-stage relay cooling process. In addition, a part of the return water of the machine room is heated after passing through the cooling pad 11, mixed with the remaining part of the return water of the machine room, and then cooled by the third heat exchange channel 42 and the fourth heat exchange channel 43 to obtain the required water temperature of the machine room, and finally sent to the first heat exchange coil 3 in the machine room.

[0027] As shown, Figure 3As shown, the second working mode is as follows: when the ambient temperature is between the preset upper limit and the preset lower limit, the connection between the first heat exchange channel 21 and the surface cooler 11 is disconnected. In this working mode, the second heat exchange coil 12 in the first water tank 71 is cooled by the water in the first water tank 71 and then sent to the surface cooler 11. The outdoor medium-temperature air exchanges heat with the surface cooler 11 and is cooled down. Then it enters the first packing 61 and exchanges heat and mass with the cooling water in the first packing 61. Then it enters the second packing 62 and is finally discharged into the atmosphere by the fan 83. By using the water in the first water tank 71 to cool the second heat exchange coil 12, and at the same time cooling the fifth heat exchange channel 45 through the sixth heat exchange channel 46 of the third heat exchanger 44, the third heat exchanger 44 is cooled, thereby dissipating heat and cooling the third heat exchanger 44 of the chiller, which leads to a decrease in the condensing temperature of the chiller and can effectively reduce the pressure of the chiller. The power consumption of compressor 47 is reduced, thus lowering the PUE value of the computer room. The cooling water from the first water tank 71 is divided into two paths. One path enters the second heat exchange channel 22, where it exchanges heat with the computer room return water and is heated. Then, it is sprayed onto the second packing material 62 through the second spray pipe 52, where it undergoes an evaporative cooling and heat transfer process with the air. It then flows into the second water tank 72 and is sprayed onto the first packing material 61 through the first spray pipe 51, undergoing a two-stage relay cooling process. Finally, it flows into the first water tank 71. The cooling water from the first water tank 71 is also heated by heat exchange through the sixth heat exchange channel 46 and the fifth heat exchange channel 45. The computer room return water is pre-cooled after passing through the first heat exchange channel 21, resulting in a lower water temperature. It then exchanges heat through the third heat exchange channel 42 and the fourth heat exchange channel 43 to achieve the required water temperature for the computer room. Finally, it is sent to the first heat exchange coil 3 in the computer room.

[0028] like Figure 4 As shown, the third working mode is as follows: when the ambient temperature is lower than the preset lower limit, the second heat exchanger 41 and the third heat exchanger 44 are bypassed. In this working mode, the second heat exchange coil 12 in the first water tank 71 is initially heated by the water in the first water tank 71, and then mixed with a portion of the high-temperature return water from the computer room before being sent to the surface cooler 11. The outdoor low-temperature air is heated by the surface cooler 11, and its temperature rises. Then, it enters the first packing 61 through the air duct and exchanges heat and mass with the cooling water. Then, it enters the second packing 62 and is finally discharged into the atmosphere. The cooling water coming out of the first water tank 71 enters the second heat exchange channel 22, exchanges heat with the return water from the computer room, and then is sprayed onto the second packing 62 through the second spray pipe 52. On the second packing 62, it undergoes an evaporative cooling and heat transfer process with the air and flows into the second water tank 72. Then, it is sprayed onto the first packing 61 through the first spray pipe 51 for a two-stage relay cooling process, and finally flows into the first water tank 71.

[0029] In this embodiment, outdoor air is first exchanged with cooling water in the first filler 61, so the water temperature in the first water tank 71 is lower than that in the second water tank 72. Moreover, the water in the first water tank 71 undergoes two evaporation cooling processes, which further reduces the water temperature in the first water tank 71 and allows for the provision of more cooling capacity.

[0030] This embodiment describes a multi-mode data center cooling system. The cooling assembly further includes a compressor 47 located between one end of the fourth heat exchange channel 43 and one end of the fifth heat exchange channel 45, and an expansion valve 48 located between the other end of the fourth heat exchange channel 43 and the other end of the fifth heat exchange channel 45. This configuration enables the cooling assembly to possess excellent cooling capacity.

[0031] In this embodiment, a multi-mode data center cooling system is described, in which the second heat exchange coil 12 is located in the first water tank 71. Since the water temperature in the first water tank 71 is lower than that in the second water tank 72, the above arrangement can provide the surface cooler 11 with cooler water at a lower temperature.

[0032] This embodiment describes a multi-mode data center cooling system, which further includes an air inlet 81 and an air outlet 82; the surface cooler 11, the first packing 61, and the second packing 62 are all disposed between the air inlet 81 and the air outlet 82; the first packing 61 is disposed between the surface cooler 11 and the second packing 62; the surface cooler 11 is disposed at one end near the air inlet 81; and the second packing 62 is disposed at one end near the air outlet 82.

[0033] Specifically, through the above arrangement, outdoor air exchanges heat with the surface cooler 11 after passing through the air inlet 81, then exchanges heat with cooling water in the first packing 61, and finally exchanges heat with the second packing 62.

[0034] In this embodiment, a multi-mode data center cooling system is provided with a fan 83 at the second spray pipe 52. This arrangement allows the fan 83 to directly dissipate heat from the high-temperature water in the second spray pipe 52, effectively expelling a large amount of heat to the outdoor side. This reduces the heat exchange temperature difference at the second packing 62, thus reducing the heat exchange load on the second packing 62 and improving energy efficiency.

[0035] This embodiment describes a multi-mode data center cooling system. A first bypass pipe 91 is provided between one end of the first heat exchange channel 21 and the other end of the first heat exchange channel 21; the first bypass pipe 91 is equipped with a first bypass valve 92; a second bypass pipe 93 is provided between one end of the third heat exchange channel 42 and the other end of the third heat exchange channel 42; the second bypass pipe 93 is equipped with a second bypass valve 94; a first control valve 23 is provided between one end of the first heat exchange channel 21 and one end of the surface cooler 11; a second control valve 24 is provided between the other end of the first heat exchange channel 21 and the other end of the surface cooler 11; a third control valve 13 is provided between one end of the surface cooler 11 and one end of the second heat exchange coil 12; a first circulation pump 31 is provided between one end of the first heat exchange channel 21 and one end of the first heat exchange coil 3; a fourth control valve 14 and a second circulation pump 15 are provided between the other end of the surface cooler 11 and the other end of the second heat exchange coil 12. Specifically, in this embodiment, by setting a first bypass pipe 91 and a first bypass valve 92, the first heat exchange channel 21 can be bypassed; by setting a second bypass pipe 93 and a second bypass valve 94, the third heat exchange channel 42 can be bypassed; by setting a first control valve 23 and a second control valve 24, the connection between the first heat exchange channel 21 and the surface cooler 11 can be controlled; by setting a third control valve 13 and a fourth control valve 14, the connection between the surface cooler 11 and the second heat exchange coil 12 can be controlled; by setting a first circulation pump 31, water can be driven to flow between one end of the first heat exchange channel 21 and the first heat exchange coil 3; by setting a second circulation pump 15, water can be driven to flow between the surface cooler 11 and the second heat exchange coil 12.

[0036] The multi-mode data center cooling system described in this embodiment further includes a third circulation pump 73; the water tank assembly is connected to the other end of the second heat exchange channel 22 and one end of the sixth heat exchange channel 46 via the third circulation pump 73. One end of the third circulation pump 73 is connected to the water tank assembly; a fifth control valve 74 is provided between the other end of the third circulation pump 73 and the other end of the second heat exchange channel 22; a sixth control valve 75 is provided between the other end of the third circulation pump 73 and one end of the sixth heat exchange channel 46; preferably, one end of the third circulation pump 73 is connected to the first water tank 71.

[0037] Specifically, in this embodiment, by setting a third circulation pump 73, the water in the first water tank 71 can be driven to flow to the second heat exchange channel 22 and the sixth heat exchange channel 46; by setting a fifth control valve 74, the connection between the first water tank 71 and the second heat exchange channel 22 can be controlled; and by setting a sixth control valve 75, the connection between the first water tank 71 and the sixth heat exchange channel 46 can be controlled.

[0038] In this embodiment, a multi-mode data center cooling system is provided, wherein a fourth circulation pump 76 is installed between the second water tank 72 and the first spray pipe 51. This arrangement drives the water from the second water tank 72 to flow towards the first spray pipe 51.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A multi-mode data center cooling system, characterized in that: It includes a spray assembly, a packing assembly, a water tank assembly, a surface cooler (11), a first heat exchanger (2), a first heat exchange coil (3), a second heat exchange coil (12), and a refrigeration assembly; the first heat exchanger (2) includes a first heat exchange channel (21) and a second heat exchange channel (22); the spray assembly, the packing assembly, and the water tank assembly are respectively arranged; One end of the first heat exchange channel (21) is connected to one end of the first heat exchange coil (3); the other end of the first heat exchange channel (21) is connected to the other end of the first heat exchange coil (3) after exchanging heat with the refrigeration component; one end of the first heat exchange channel (21) is connected to one end of the surface cooler (11); the other end of the first heat exchange channel (21) is connected to the other end of the surface cooler (11); one end of the second heat exchange channel (22) is connected to the spray component; the other end of the second heat exchange channel (22) is connected to the water tank component; the water tank component is connected to the spray component after exchanging heat with the refrigeration component; one end of the second heat exchange coil (12) is connected to one end of the surface cooler (11); the other end of the second heat exchange coil (12) is connected to the other end of the surface cooler (11); the second heat exchange coil (12) is located in the water tank component.

2. The multi-mode data center cooling system according to claim 1, characterized in that: The refrigeration assembly includes a second heat exchanger (41) and a third heat exchanger (44); the second heat exchanger (41) includes a third heat exchange channel (42) and a fourth heat exchange channel (43); the third heat exchanger (44) includes a fifth heat exchange channel (45) and a sixth heat exchange channel (46); one end of the third heat exchange channel (42) is connected to the other end of the first heat exchange channel (21); the other end of the third heat exchange channel (42) is connected to the other end of the first heat exchange coil (3); one end of the fourth heat exchange channel (43) is connected to one end of the fifth heat exchange channel (45); the other end of the fourth heat exchange channel (43) is connected to the other end of the fifth heat exchange channel (45); one end of the sixth heat exchange channel (46) is connected to the water tank assembly; the other end of the sixth heat exchange channel (46) is connected to the spray assembly.

3. The multi-mode data center cooling system according to claim 2, characterized in that: The refrigeration assembly also includes a compressor (47) located between one end of the fourth heat exchange channel (43) and one end of the fifth heat exchange channel (45), and an expansion valve (48) located between the other end of the fourth heat exchange channel (43) and the other end of the fifth heat exchange channel (45).

4. The multi-mode data center cooling system according to claim 1, characterized in that: The spray assembly includes a first spray pipe (51) and a second spray pipe (52); the packing assembly includes a first packing material (61) and a second packing material (62); the water tank assembly includes a first water tank (71) and a second water tank (72); the first spray pipe (51), the first packing material (61), and the first water tank (71) are correspondingly arranged; the second spray pipe (52), the second packing material (62), and the second water tank (72) are correspondingly arranged; one end of the second heat exchange channel (22) is connected to the second spray pipe (52); the first water tank (71) is connected to the second spray pipe (52) after exchanging heat with the refrigeration assembly; the other end of the second heat exchange channel (22) is connected to the first water tank (71); the second water tank (72) is connected to the first spray pipe (51).

5. A multi-mode data center cooling system according to claim 4, characterized in that: The second heat exchange coil (12) is located in the first water tank (71).

6. A multi-mode data center cooling system according to claim 4, characterized in that: The multi-mode data center cooling system also includes an air inlet (81) and an air outlet (82); the surface cooler (11), the first packing (61) and the second packing (62) are all located between the air inlet (81) and the air outlet (82); the first packing (61) is located between the surface cooler (11) and the second packing (62); the surface cooler (11) is located at one end near the air inlet (81); the second packing (62) is located at one end near the air outlet (82).

7. A multi-mode data center cooling system according to claim 6, characterized in that: A fan (83) is installed at the second spray pipe (52).

8. A multi-mode data center cooling system according to claim 2, characterized in that: A first bypass pipe (91) is provided between one end of the first heat exchange channel (21) and the other end of the first heat exchange channel (21); the first bypass pipe (91) is provided with a first bypass valve (92); a second bypass pipe (93) is provided between one end of the third heat exchange channel (42) and the other end of the third heat exchange channel (42); the second bypass pipe (93) is provided with a second bypass valve (94); a first control valve (23) is provided between one end of the first heat exchange channel (21) and one end of the surface cooler (11); A second control valve (24) is provided between the other end of the first heat exchange channel (21) and the other end of the surface cooler (11); a third control valve (13) is provided between one end of the surface cooler (11) and one end of the second heat exchange coil (12); a first circulation pump (31) is provided between one end of the first heat exchange channel (21) and one end of the first heat exchange coil (3); a fourth control valve (14) and a second circulation pump (15) are provided between the other end of the surface cooler (11) and the other end of the second heat exchange coil (12).

9. A multi-mode data center cooling system according to claim 2, characterized in that: The multi-mode data center cooling system also includes a third circulation pump (73); the water tank assembly is connected to the other end of the second heat exchange channel (22) and one end of the sixth heat exchange channel (46) respectively after passing through the third circulation pump (73); One end of the third circulation pump (73) is connected to the water tank assembly; a fifth control valve (74) is provided between the other end of the third circulation pump (73) and the other end of the second heat exchange channel (22); a sixth control valve (75) is provided between the other end of the third circulation pump (73) and one end of the sixth heat exchange channel (46).

10. A multi-mode data center cooling system according to claim 4, characterized in that: A fourth circulation pump (76) is provided between the second water tank (72) and the first spray pipe (51).

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