Air-liquid mixed refrigerating system for data center based on rotating wheel dehumidification device

Abstract

The utility model discloses an air-liquid mixed type refrigerating system for a data center based on a rotating wheel dehumidification device. The air-liquid mixed type refrigerating system comprises a data center air return channel arranged at the top in a data center machine room, a data center air supply channel formed below a floor in the data center machine room, and a plurality of cabinet units arranged on the floor in the data center machine room. Each cabinet unit is composed of two cabinets, the air inlet sides of the two cabinets in each cabinet unit are oppositely arranged, a cold channel is formed between the air inlet sides of the two cabinets, a cold air outlet is formed in the position, corresponding to a floor grid, of the lower portion of the cold channel, and the cold channel is communicated with a data center air supply channel through the cold air outlet. A heat channel is formed between every two adjacent cabinet units, and the heat channels are communicated with the data center air return channel; a cooling liquid distribution unit is also arranged in the data center machine room; the system further comprises an air-liquid mixed refrigerating unit. The system has the characteristics of integrated design, convenience in rapid deployment and reduction of the energy consumption of the data center cooling system.

Description

TECHNICAL FIELD

[0001] The utility model belongs to air conditioning equipment technical field, concretely relates to data center air -liquid mixed type refrigerating system based on runner dehumidification device. BACKGROUND

[0002] With the server power consumption rising, the industry supports the single cabinet power consumption of AI calculation to surge, and the data center puts forward higher requirements for heat dissipation. The air -liquid mixed type cooling system combines the advantages of high liquid cooling heat dissipation efficiency and air cooling system, can satisfy the heat dissipation demand of high density data center, relative to single air cooling or water cooling system, more energy saving operation energy consumption and floor area, and it is also one of important cooling modes of future high density data center.

[0003] In the traditional air -liquid mixed type cooling mode, two sets of refrigerating systems are often used, and the construction deployment cycle is long, and the operation control is complicated;In the traditional runner dehumidification device, the regeneration temperature requirement of dehumidification material is higher, and the energy consumption is large, and the development is restricted by economy;The natural cold source use time of ordinary indirect evaporative cooling air handling unit in high humidity area is relatively short. UTILITY MODEL CONTENTS

[0004] The utility model discloses a data center air -liquid mixed type refrigerating system based on runner dehumidification device, has the characteristics of integrated design, convenient quick deployment and the feature of reducing data center cooling system energy consumption.

[0005] The utility model discloses a data center air -liquid mixed type refrigerating system based on runner dehumidification device, has the characteristics of integrated design, convenient quick deployment and the feature of reducing data center cooling system energy consumption.

[0006] Still include air -liquid mixed type refrigerating unit, air -liquid mixed type refrigerating unit with data center return air passage and data center air supply passage intercommunication;Air -liquid mixed type refrigerating unit is connected with cooling liquid distribution unit through pipe network component.

[0007] The utility model discloses a data center air -liquid mixed type refrigerating system based on runner dehumidification device, has the characteristics of integrated design, convenient quick deployment and the feature of reducing data center cooling system energy consumption.

[0008] The pipe network assembly comprises a return water pipe, a water supply pipe and a three-way valve, a first end of the return water pipe is connected with a liquid outlet of the cooling liquid distribution unit, and a second end of the return water pipe is connected with the air-liquid mixed refrigeration unit; a first end of the water supply pipe is connected with a liquid inlet of the cooling liquid distribution unit, a second end of the water supply pipe is connected with a first port of the three-way valve, a second port of the three-way valve is connected with a unit water outlet pipe, and the unit water outlet pipe is also connected with the air-liquid mixed refrigeration unit; a third port of the three-way valve is connected with an air cooler water outlet pipe, and the air cooler water outlet pipe is also connected with the air-liquid mixed refrigeration unit.

[0009] A circulating water pump is arranged on the water supply pipe.

[0010] The air-liquid mixed refrigeration unit comprises a unit shell, the unit shell is divided into two independent unit return air passages and a unit air supply passage, and further comprises a rotary dehumidification device, the rotary dehumidification device penetrates through the unit return air passages and the unit air supply passage, a rotary dehumidification device restoration part of the rotary dehumidification device is located in the unit return air passage, and a rotary dehumidification device dehumidification part of the rotary dehumidification device is located in the unit air supply passage.

[0011] Air inlets A and air supply outlets are respectively arranged on two opposite side walls of the shell at two ends of the unit air supply passage, the unit air supply passage is communicated with the data center air supply passage through the air supply outlet, and the unit air supply passage between the air inlets A and the air supply outlet is sequentially provided with a bag filter, an air cooler, a vertical pipe indirect evaporative cooling unit, a rotary dehumidification device dehumidification part, a direct evaporative cooling unit, a water baffle B, an evaporator and an air supply fan in sequence according to the air flow direction.

[0012] An air outlet A is arranged on the outer wall of the unit shell corresponding to the vertical pipe indirect evaporative cooling unit, and an air inlet B is arranged on the outer wall of the unit shell corresponding to one side of the vertical pipe indirect evaporative cooling unit.

[0013] An air outlet B and an air return inlet are arranged on the outer wall of the unit shell corresponding to the unit return air passage, the unit return air passage is communicated with the data center air return passage through the air return inlet, and the unit return air passage between the air outlet B and the air return inlet is sequentially provided with an expansion valve, a condenser, a compressor, an air blower B and a rotary dehumidification device restoration part in sequence according to the air flow direction.

[0014] The compressor, the condenser, the expansion valve and the evaporator are sequentially connected, the evaporator is further connected with the compressor, and the compressor, the condenser, the expansion valve and the evaporator form a closed loop.

[0015] The liquid inlet of the air cooler is connected with the liquid outlet of the cooling liquid distribution unit through the return water pipe, the liquid outlet of the air cooler is connected with the third port of the three-way valve through the air cooler water outlet pipe, the vertical pipe indirect evaporative cooling unit is connected with the second port of the three-way valve through the unit water outlet pipe, and the vertical pipe indirect evaporative cooling unit is also communicated with the air cooler water outlet pipe through the first water supply pipe.

[0016] The first water supply pipe is provided with a butterfly valve.

[0017] The stand pipe indirect evaporative cooling unit comprises, from top to bottom, an air exhaust fan A, a water baffle A, a spraying device A, a stand pipe indirect evaporative cooling heat exchanger and a cold water tank.

[0018] The cold water tank is connected with the second port of the three-way valve through a unit water outlet pipeline.

[0019] The air exhaust port A is located above the air exhaust fan A, and the air inlet port B is located at a position corresponding to the outer wall of the unit shell between the stand pipe indirect evaporative cooling heat exchanger and the cold water tank.

[0020] The cold water tank is provided with a float ball valve A.

[0021] The direct evaporative cooling unit comprises, from top to bottom, a cold spraying device B, direct evaporative cooling filler and a water storage tank; the cold spraying device B is communicated with the water storage tank through a second water supply pipe; and a spraying water pump is arranged on the second water supply pipe.

[0022] The water storage tank is provided with a float ball valve B.

[0023] The utility model discloses the beneficial effect is:

[0024] (1) the utility model discloses a refrigeration system adopts the dehumidification of the wheel device to the air of entering unit air supply channel dehumidification, reduces the moisture content in the air, increases the dry air energy of entering direct evaporative cooling unit air, not only increases the use time of natural cold source but also expands the use regional scope of unit, and simultaneously restores the moisture absorption material of the wheel device through the waste heat recovery of data center and the waste heat generated in the condenser and compressor of mechanical refrigeration supplementary cooling unit, fully utilizes the waste heat of system, and energy -efficient.

[0025] (2) the utility model discloses a refrigeration system can make cold air and cold water simultaneously, can simplify system structure, reduces the construction and operation cost, realizes the flexible adjustment of wind liquid cooling, satisfies different scenes and demand, improves energy utilization efficiency. It has the characteristics of integrated design, convenient quick deployment and reducing the energy consumption of data center cooling system.

[0026] (3) the utility model discloses a refrigeration system when the outdoor temperature is higher, the return water of cooling liquid distribution unit first carries out precooling through the surface cooler and then carries out cooling through the stand pipe indirect evaporative cooling unit, and simultaneously, through the setting butterfly valve, the water amount entering the stand pipe indirect evaporative cooling unit can be intelligently controlled according to the load condition of machine room, and the system is energy -saving and environment -friendly.

[0027] (4) the utility model discloses a refrigeration system when the outdoor temperature is lower, coupling is carried out through the surface cooler and the stand pipe indirect evaporative cooling unit to make cold water, and when the outdoor temperature is lower, only the surface cooler is used to make cold water, so as to prevent the stand pipe indirect evaporative cooling from icing, and the utility model discloses safe and practical.

[0028] (5) The air-liquid mixed refrigerating unit in the refrigerating system adopts a container form, has high equipment integration degree, is simple to install, and is convenient to transport.

[0029] (6) The refrigerating system sets three working modes respectively according to different outdoor working conditions and cold quantity demands, can not only use natural cold source as much as possible, but also can meet the refrigerating demands of cold users throughout the year, is energy-saving and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structure schematic view of the air-liquid mixed refrigerating system for data center based on a rotary dehumidifying device of the utility model;

[0031] Figure 2 is a mixed cooling mode schematic view of the air-liquid mixed refrigerating system for data center based on a rotary dehumidifying device of the utility model;

[0032] Figure 3 is an air-cooled cooling mode schematic view of the air-liquid mixed refrigerating system for data center based on a rotary dehumidifying device of the utility model;

[0033] Figure 4 is a structure schematic view of a rotary dehumidifying device in the refrigerating system of the utility model;

[0034] Figure 5 is a structure schematic view of an indirect evaporative cooling heat exchanger between vertical pipes in the refrigerating system of the utility model.

[0035] In the figure, 1. air inlet A, 2. bag filter, 3. surface cooler, 4. cold water tank, 5. air inlet B, 6. float ball valve A, 7. vertical pipe indirect evaporative cooling heat exchanger, 8. water baffle A, 9. exhaust fan A, 10. spraying device A, 11. butterfly valve, 12. air outlet A, 13. air outlet B, 14. rotary dehumidifying device, 15. exhaust fan B, 16. water storage tank, 17. spraying water pump, 18. spray cooling device B, 19. direct evaporative cooling filler, 20. float ball valve B, 21. water baffle B, 22. compressor, 23. condenser, 24. expansion valve, 25. evaporator, 26. air supply outlet, 27. air supply outlet, 28. return air outlet, 29. unit shell, 30. unit return air passage, 31. unit air supply passage, 32. three-way valve, 33. unit water outlet pipeline, 34. surface cooler water outlet pipeline, 35. circulating water pump, 36. rotary dehumidifying device restoration part, 37. rotary dehumidifying device dehumidification part, 38. rotary, 39. motor, 40. return water pipeline, 41. water supply pipeline, 42. cooling liquid distribution unit, 43. data center air supply passage, 44. floor grille, 45. server, 46. cabinet, 47. data center return air passage, 48. hot channel, 49. cold channel, 50. first water supply pipe, 51. second water supply pipe, 52. upper baffle, 53. heat exchange round pipe group, 54. lower baffle. DETAILED DESCRIPTION

[0036] The utility model will be described in detail below in combination with the drawings and specific embodiments.

[0037] The utility model provides a data center air -liquid mixed formula refrigeration system based on rotary dehumidifying device, such as Figure 1 As shown, the data center return air passage 47 is arranged on the top of the data center machine room, the data center air supply passage 43 is formed below the floor of the data center machine room, and a plurality of cabinet units are arranged on the floor of the data center machine room. Each cabinet unit is composed of two cabinets 46, the air inlet sides of the two cabinets 46 in each cabinet unit are oppositely arranged, the cold channel 49 is formed between the air inlet sides of the two cabinets 46, the cold air outlet is arranged at the corresponding floor grille 44 of the lower part of the cold channel 49, and the cold channel 49 is communicated with the data center air supply passage 43 through the cold air outlet. The hot channel 48 is formed between adjacent two cabinet units, the hot channel 48 is communicated with the data center return air passage 47, and the cooling liquid distribution unit 42 is further arranged in the data center machine room.

[0038] The server 45 is loaded in the data cabinet 46.

[0039] The air-liquid hybrid refrigeration unit is communicated with the data center return air passage 47 and the data center supply air passage 43; the air-liquid hybrid refrigeration unit is connected with the cooling liquid distribution unit 42 through a pipe network assembly. The cooling liquid distribution unit 42 is of RAL110-04U19 type or RAA32-10U21 type or ROL1100-48U32 type;

[0040] The pipe network assembly comprises a return water pipe 40, a supply water pipe 41 and a three-way valve 32. The first end of the return water pipe 40 is connected with the liquid outlet of the cooling liquid distribution unit 42, and the second end of the return water pipe 40 is connected with the air-liquid hybrid refrigeration unit. The first end of the supply water pipe 41 is connected with the liquid inlet of the cooling liquid distribution unit 42, the second end of the supply water pipe 41 is connected with the first port of the three-way valve 32, the second port of the three-way valve 32 is connected with a unit water outlet pipe 33, and the unit water outlet pipe 33 is also connected with the air-liquid hybrid refrigeration unit. The third port of the three-way valve 32 is connected with an air cooler water outlet pipe 34, and the air cooler water outlet pipe 34 is also connected with the air-liquid hybrid refrigeration unit.

[0041] The supply water pipe 41 is provided with a circulating water pump 35.

[0042] The air-liquid hybrid refrigeration unit comprises a unit shell 29, which is divided into two independent unit return air passages 30 and unit supply air passages 31. The air-liquid hybrid refrigeration unit also comprises a rotary dehumidification device 14, which penetrates the unit return air passage 30 and the unit supply air passage 31. The rotary dehumidification device 14 further comprises a rotary dehumidification device return part 36 located in the unit return air passage 30 and a rotary dehumidification device dehumidification part 37 located in the unit supply air passage 31. The rotary dehumidification device 14 comprises a rotary wheel 38 and a driving motor 39, and the driving motor 39 drives the rotary wheel 38 to rotate through a belt. The dehumidifier is made of aluminum oxide or a mixture of aluminum oxide and polyacrylic acid.

[0043] The unit supply air passage 31 is provided with an air inlet A1 and a supply air outlet 27 on the two opposite side walls of the shell at both ends, respectively. The unit supply air passage 31 is communicated with the data center supply air passage 43 through the supply air outlet 27. The unit supply air passage 31 between the air inlet A1 and the supply air outlet 27 is provided with a bag filter 2, an air cooler 3, a vertical pipe indirect evaporative cooling unit, a rotary dehumidification device dehumidification part 37, a direct evaporative cooling unit, a water baffle B21, an evaporator 25 and a supply air fan 26 in sequence according to the air flow direction.

[0044] An air outlet A12 is arranged on the outer wall of the unit shell 29 corresponding to the upper part of the vertical pipe indirect evaporative cooling unit, and an air inlet B5 is arranged on the outer wall of the unit shell 29 corresponding to one side of the vertical pipe indirect evaporative cooling unit.

[0045] The outer wall of the unit shell 29 corresponding to the unit return air passage 30 is provided with an exhaust air outlet B13 and a return air outlet 28, the unit return air passage 30 is communicated with the data center return air passage 47 through the return air outlet 28; the unit return air passage 30 between the exhaust air outlet B13 and the return air outlet 28 is sequentially provided with the expansion valve 24, the condenser 23, the compressor 22, the exhaust fan B15 and the rotary dehumidification device restoration part 36 in the air flow direction;

[0046] The compressor 22, the condenser 23, the expansion valve 24 and the evaporator 25 are sequentially connected, the evaporator 25 is also connected with the compressor 22, and the compressor 22, the condenser 23, the expansion valve 24 and the evaporator 25 constitute a mechanical refrigeration cooling unit by forming a closed loop by a refrigerant pipeline;

[0047] The liquid inlet of the surface cooler 3 is connected with the liquid outlet of the cooling liquid distribution unit 42 through the return water pipeline 40; the liquid outlet of the surface cooler 3 is connected with the third port of the three-way valve 32 through the surface cooler water outlet pipeline 34; the vertical pipe indirect evaporative cooling unit is connected with the second port of the three-way valve 32 through the unit water outlet pipeline 33; and the vertical pipe indirect evaporative cooling unit is also communicated with the surface cooler water outlet pipeline 34 through the first water supply pipeline 50.

[0048] The butterfly valve 11 is arranged on the first water supply pipeline 50.

[0049] The vertical pipe indirect evaporative cooling unit comprises, from top to bottom, the exhaust fan A9, the water baffle A8, the spraying device A10, the vertical pipe indirect evaporative cooling heat exchanger 7 and the cold water tank 4.

[0050] The spraying device A comprises a water distribution pipe A, a plurality of spray heads are arranged on the water distribution pipe A, and the water distribution pipe A is communicated with the first water supply pipeline 50.

[0051] As shown in Figure 5 The vertical pipe indirect evaporative cooling heat exchanger 7 comprises, from top to bottom, the upper baffle 52, the heat exchange round pipe group 53 and the lower baffle 54; the heat exchange round pipe group 53 is composed of a plurality of vertically arranged heat exchange round pipes, and the heat exchange round pipes are made of aluminum alloy or cast iron;

[0052] The cold water tank 4 is connected with the second port of the three-way valve 32 through the unit water outlet pipeline 33.

[0053] The exhaust air outlet A12 is located above the exhaust fan A9, and the air inlet B5 is located at the outer wall of the unit shell 29 corresponding to the space between the vertical pipe indirect evaporative cooling heat exchanger 7 and the cold water tank 4.

[0054] The cold water tank 4 is provided with the float valve A6.

[0055] The direct evaporative cooling unit comprises a spray cooling device B18, a direct evaporative cooling filler 19 and a water storage tank 16 arranged in sequence from top to bottom; the spray cooling device B18 is communicated with the water storage tank 16 through a second water supply pipe 51; and the second water supply pipe 51 is provided with a spray water pump 17.

[0056] The spray device B comprises a water distribution pipe B provided with a plurality of spray heads, and the water distribution pipe B is communicated with the second water supply pipe 51.

[0057] The water storage tank 16 is provided with a floating ball valve B20.

[0058] The working principle of the air-liquid mixed refrigeration system for data center based on the rotary dehumidification device is as follows:

[0059] As shown in the indirect evaporative cooling unit of the riser pipe, Figure 1 A part of outdoor air enters the heat exchange pipe 53 through the lower baffle 54 of the indirect evaporative cooling heat exchanger 7 of the riser pipe and is subjected to direct evaporative cooling with the water discharged through the spray device A10, so that the temperature of the water and the air is reduced at the same time; then the air passes through the upper baffle 52 and the water baffle A8 and is discharged into the outdoor through the air outlet A12 under the action of the exhaust fan A9, and the cooled water is gathered in the cold water tank 4; the other part of the air is subjected to sensible heat exchange with the air and the water in the pipe when passing through the outer wall of the heat exchange pipe in the indirect evaporative cooling heat exchanger 7 of the riser pipe through the air inlet A1, so that the temperature is reduced.

[0060] As shown in the unit air supply channel, Figure 4 The air in the unit air supply channel passes through the dehumidification part 37 of the rotary dehumidification device, the water vapor in the air is adsorbed by the dehumidifier in the dehumidification part 37 of the rotary dehumidification device, a dehumidification process occurs, and the moisture content in the air is reduced; at the same time, the waste heat recovered from the data center return air channel 47 and the condenser 23 of the mechanical refrigeration supplementary cooling unit passes through the reduction part 36 of the rotary dehumidification device, and the dehumidifier is reduced in the rotary wheel 38; the rotary wheel 38 in the rotary dehumidification device 14 rotates under the action of the driving motor 39, so as to form a cycle.

[0061] The refrigeration system of the utility model is divided into three modes according to outdoor temperature:

[0062] (1) Mechanical supplementary cooling mode

[0063] When the outdoor wet-bulb temperature is 24 DEG C and above 24 DEG C, the system runs in the mixed cooling mode. Figure 1As shown, mechanical refrigeration supplemental cooling unit, standpipe indirect evaporative cooling unit work; outdoor air through the air inlet A1, bag filter 2 to reach the cooling coil 3, in the cooling coil 3 with the data center cooling liquid distribution unit 42 heat exchange, air temperature rises, cooling coil 3 water temperature decreases, after the standpipe indirect evaporative cooling heat exchange unit, with the standpipe indirect evaporative cooling heat exchanger 7 is cooled, and then through the rotary dehumidification device dehumidification part 37, the air humidity is reduced, and then through the direct evaporative cooling unit, direct evaporative cooling occurs, the air temperature is reduced to close to the rotary dehumidification device dehumidification part 36 outlet air wet bulb temperature, and finally by the evaporator 25 of the mechanical refrigeration supplemental cooling unit further cooling, under the action of the supply fan 26, through the air supply port 27 into the data center air supply channel 43; the air in the direct evaporative cooling unit is cooled by the direct evaporative cooling filler 19, and the water on the surface of the direct evaporative cooling filler 19 is sprayed by the spraying device 18 under the action of the spraying water pump 17, the air temperature is reduced;

[0064] The air sent into the data center air supply channel 43 enters the cooling channel 49 through the floor grille 44, and then enters the hot channel 48 after cooling the server 45 loaded therein through the data cabinet 46, and finally enters the data center return air channel 47 and the return air inlet 28 to return to the air-liquid hybrid refrigeration unit;

[0065] The air in the air-liquid hybrid refrigeration unit enters the air-liquid hybrid refrigeration unit, passes through the expansion valve 24, the condenser 23, and the compressor 22 while taking away the heat generated thereby, so that the air temperature is further increased, and then the air is discharged into the outdoor environment through the rotary dehumidification device restoration part 36 and the exhaust air outlet 13 under the action of the exhaust fan 15, so as to circulate; the high-temperature and high-pressure gaseous refrigerant passing through the compressor 22, the refrigerant pipeline, the condenser 23, the expansion valve 24 and the evaporator 25, and finally the compressor 22, so as to circulate;

[0066] The cold water in the air-liquid hybrid refrigeration unit enters the air-liquid hybrid refrigeration unit, passes through the expansion valve 24, the condenser 23, and the compressor 22 while taking away the heat generated thereby, so that the air temperature is further increased, and then the air is discharged into the outdoor environment through the rotary dehumidification device restoration part 36 and the exhaust air outlet 13 under the action of the exhaust fan 15, so as to circulate; the high-temperature and high-pressure gaseous refrigerant passing through the compressor 22, the refrigerant pipeline, the condenser 23, the expansion valve 24 and the evaporator 25, and finally the compressor 22, so as to circulate;

[0067] (2) mixed cooling mode

[0068] When the outdoor wet-bulb temperature is below 24°C and the dry-bulb temperature is above 0°C, the system operates in hybrid cooling mode. For example... Figure 2 As shown, the mechanical refrigeration supplementary cooling unit is not working, while the riser indirect evaporative cooling unit is working. Outdoor air passes through the air inlet A1 and the bag filter 2 to reach the surface cooler 3. In the surface cooler 3, it exchanges heat with the coolant distribution unit 42 in the data center, causing the air temperature to rise and the water temperature in the surface cooler 3 to drop. Then, it passes through the riser indirect evaporative cooling heat exchange unit 7 and is cooled in the riser indirect evaporative cooling heat exchanger 7. After passing through the dehumidification section 37 of the rotary dehumidifier, the moisture content in the air is reduced. Then, it passes through the direct evaporative cooling unit, where direct evaporative cooling occurs, reducing the air temperature to near the wet bulb temperature of the air at the outlet of the dehumidification section 36 of the rotary dehumidifier. Finally, under the action of the blower 26, it enters the data center air supply duct 43 through the air outlet 27.

[0069] Air supplied to the data center air supply duct 43 passes through the floor grille 44 into the cold aisle 49, then passes through the data cabinet 46 to cool the servers 45 installed therein, before entering the hot aisle 48, and finally returns to the air-liquid hybrid chiller unit through the data center return air duct 47 and return air outlet 28; air entering the air-liquid hybrid chiller unit's return air duct 30 passes through the expansion valve 24, condenser 23, and compressor 22, and is discharged into the outdoor environment through the rotary dehumidifier reduction section 36 and exhaust outlet 13 under the action of the exhaust fan 15, thus circulating in this way;

[0070] The chilled water in the chilled water tank 4 of the air-liquid hybrid chiller unit is discharged through the unit outlet pipe 33 to the three-way valve 32. Under the action of the circulating water pump 35 on the water supply pipe 41, it enters the coolant distribution unit 42 in the data center through the water supply pipe 41. The water from the coolant distribution unit 42 passes through the return water pipe 40 to the surface cooler 3 in the air-liquid hybrid chiller unit. The water from the surface cooler 3 passes through the butterfly valve 11 to the spray device A10. After passing through the riser indirect evaporative cooling heat exchanger 7, it returns to the chilled water tank 4, and so on.

[0071] (3) Air-cooled mode

[0072] When the outdoor dry-bulb temperature is 0℃ or below, the system operates in air-cooled mode. For example... Figure 3As shown, the mechanical refrigeration supplementary cooling unit and the riser indirect evaporative cooling unit are not working; outdoor air passes through the air inlet A1 and the bag filter 2 to reach the surface cooler 3, where it exchanges heat with the coolant distribution unit 42 in the data center, causing the air temperature to rise and the water temperature in the surface cooler 3 to drop. Then, it passes through the dehumidification section 37 of the rotary dehumidifier, which reduces the moisture content in the air. After passing through the direct evaporative cooling unit, direct evaporative cooling occurs, which lowers the air temperature to near the wet bulb temperature of the air at the outlet of the dehumidification section 36 of the rotary dehumidifier. Finally, under the action of the blower 26, it enters the data center air supply channel 43 through the air outlet 27.

[0073] Air supplied to the data center air supply duct 43 passes through the floor grille 44 into the cold aisle 49, then passes through the data cabinet 46 to cool the servers 45 installed therein, before entering the hot aisle 48, and finally returns to the air-liquid hybrid chiller unit through the data center return air duct 47 and return air outlet 28; air entering the air-liquid hybrid chiller unit's return air duct 30 passes through the expansion valve 24, condenser 23, and compressor 22, and is discharged into the outdoor environment through the rotary dehumidifier reduction section 36 and exhaust outlet 13 under the action of the exhaust fan 15, thus circulating in this way;

[0074] In the air-liquid hybrid chiller unit, the water outlet of the surface cooler 3 passes through the surface cooling water outlet pipe 34 to the three-way valve 32. Under the action of the circulating water pump 35 on the water supply pipe 41, the water enters the coolant distribution unit 42 in the data center through the water supply pipe 41. The water outlet of the coolant distribution unit 42 passes through the return water pipe 40 to the surface cooler 3 in the air-liquid hybrid chiller unit, and so on.

[0075] Example 1

[0076] Data center air-liquid hybrid cooling systems based on rotary dehumidifiers, such as Figure 1 As shown, the data center includes a data center return air duct 47 located at the top of the data center, a data center supply air duct 43 formed under the floor of the data center, and multiple rack units located on the floor of the data center. Each rack unit consists of two racks 46, with the air intake sides of the two racks 46 in each rack unit facing each other, forming a cold aisle 49 between the air intake sides of the two racks 46. A cold air outlet is provided at the floor grille 44 corresponding to the lower part of the cold aisle 49, and the cold aisle 49 is connected to the data center supply air duct 43 through the cold air outlet. A hot aisle 48 is formed between two adjacent rack units, and the hot aisle 48 is connected to the data center return air duct 47. A coolant distribution unit 42 is also provided in the data center.

[0077] Server 45 is installed inside data rack 46;

[0078] It also includes a wind-liquid hybrid chiller unit, which is connected to the data center return air duct 47 and the data center supply air duct 43; the wind-liquid hybrid chiller unit is connected to the coolant distribution unit 42 through a pipeline assembly.

[0079] Example 2

[0080] Data center air-liquid hybrid cooling systems based on rotary dehumidifiers, such as Figure 1 As shown, the data center includes a data center return air duct 47 located at the top of the data center, a data center supply air duct 43 formed under the floor of the data center, and multiple rack units located on the floor of the data center. Each rack unit consists of two racks 46, with the air intake sides of the two racks 46 in each rack unit facing each other, forming a cold aisle 49 between the air intake sides of the two racks 46. A cold air outlet is provided at the floor grille 44 corresponding to the lower part of the cold aisle 49, and the cold aisle 49 is connected to the data center supply air duct 43 through the cold air outlet. A hot aisle 48 is formed between two adjacent rack units, and the hot aisle 48 is connected to the data center return air duct 47. A coolant distribution unit 42 is also provided in the data center.

[0081] Server 45 is installed inside data rack 46;

[0082] It also includes a wind-liquid hybrid chiller unit, which is connected to the data center return air duct 47 and the data center supply air duct 43; the wind-liquid hybrid chiller unit is connected to the coolant distribution unit 42 through a pipeline assembly.

[0083] The piping system includes a return water pipe 40, a supply water pipe 41, and a three-way valve 32. The first end of the return water pipe 40 is connected to the outlet of the coolant distribution unit 42, and the second end of the return water pipe 40 is connected to the air-liquid mixing chiller unit. The first end of the supply water pipe 41 is connected to the inlet of the coolant distribution unit 42, and the second end of the supply water pipe 41 is connected to the first port of the three-way valve 32. The second port of the three-way valve 32 is connected to the unit outlet water pipe 33, which is also connected to the air-liquid mixing chiller unit. The third port of the three-way valve 32 is connected to the surface cooler outlet water pipe 34, which is also connected to the air-liquid mixing chiller unit.

[0084] Example 3

[0085] Data center air-liquid hybrid cooling systems based on rotary dehumidifiers, such as Figure 1As shown, it comprises a data center return air passage 47 arranged on the top of the data center room, a data center supply air passage 43 formed below the floor of the data center room, and a plurality of cabinet units arranged on the floor of the data center room; each cabinet unit is composed of two cabinets 46, the air inlet sides of the two cabinets 46 in each cabinet unit are arranged oppositely, a cold aisle 49 is formed between the air inlet sides of the two cabinets 46, a cold air outlet is arranged at the corresponding floor grille 44 at the lower part of the cold aisle 49, and the cold aisle 49 is in communication with the data center supply air passage 43 through the cold air outlet; a hot aisle 48 is formed between adjacent two cabinet units, and the hot aisle 48 is in communication with the data center return air passage 47; a cooling liquid distribution unit 42 is further arranged in the data center room.

[0086] The data cabinet 46 is loaded with servers 45.

[0087] It further comprises an air-liquid hybrid refrigeration unit, which is in communication with the data center return air passage 47 and the data center supply air passage 43; the air-liquid hybrid refrigeration unit is connected with the cooling liquid distribution unit 42 through a pipe network assembly.

[0088] The pipe network assembly comprises a return water pipe 40, a water supply pipe 41, and a three-way valve 32; the first end of the return water pipe 40 is connected with the liquid outlet of the cooling liquid distribution unit 42, and the second end of the return water pipe 40 is connected with the air-liquid hybrid refrigeration unit; the first end of the water supply pipe 41 is connected with the liquid inlet of the cooling liquid distribution unit 42, the second end of the water supply pipe 41 is connected with the first port of the three-way valve 32, the second port of the three-way valve 32 is connected with a unit water outlet pipe 33, and the unit water outlet pipe 33 is further connected with the air-liquid hybrid refrigeration unit; the third port of the three-way valve 32 is connected with an air cooler water outlet pipe 34, and the air cooler water outlet pipe 34 is further connected with the air-liquid hybrid refrigeration unit.

[0089] A circulating water pump 35 is arranged on the water supply pipe 41.

[0090] Embodiment 4

[0091] The air-liquid hybrid refrigeration system for data centers based on the rotary dehumidification device, as shown in Figure 1As shown, it comprises a data center return air passage 47 arranged on the top of the data center room, a data center supply air passage 43 formed below the floor of the data center room, and a plurality of cabinet units arranged on the floor of the data center room; each cabinet unit is composed of two cabinets 46, the air inlet sides of the two cabinets 46 in each cabinet unit are arranged oppositely, a cold aisle 49 is formed between the air inlet sides of the two cabinets 46, a cold air outlet is arranged at the corresponding floor grille 44 at the lower part of the cold aisle 49, and the cold aisle 49 is communicated with the data center supply air passage 43 through the cold air outlet; a hot aisle 48 is formed between adjacent two cabinet units, and the hot aisle 48 is communicated with the data center return air passage 47; a cooling liquid distribution unit 42 is further arranged in the data center room.

[0092] The data cabinet 46 is loaded with servers 45.

[0093] It further comprises an air-liquid hybrid refrigeration unit, which is communicated with the data center return air passage 47 and the data center supply air passage 43; the air-liquid hybrid refrigeration unit is connected with the cooling liquid distribution unit 42 through a pipe network assembly.

[0094] The pipe network assembly comprises a return water pipe 40, a water supply pipe 41, and a three-way valve 32; the first end of the return water pipe 40 is connected with the liquid outlet of the cooling liquid distribution unit 42, and the second end of the return water pipe 40 is connected with the air-liquid hybrid refrigeration unit; the first end of the water supply pipe 41 is connected with the liquid inlet of the cooling liquid distribution unit 42, the second end of the water supply pipe 41 is connected with the first port of the three-way valve 32, the second port of the three-way valve 32 is connected with a unit water outlet pipe 33, and the unit water outlet pipe 33 is further connected with the air-liquid hybrid refrigeration unit; the third port of the three-way valve 32 is connected with an air cooler water outlet pipe 34, and the air cooler water outlet pipe 34 is further connected with the air-liquid hybrid refrigeration unit.

[0095] A circulating water pump 35 is arranged on the water supply pipe 41.

[0096] The air-liquid hybrid refrigeration unit comprises a unit shell 29, which is divided into two independent unit return air passages 30 and unit supply air passages 31; the air-liquid hybrid refrigeration unit further comprises a rotary dehumidification device 14, which penetrates the unit return air passages 30 and the unit supply air passages 31; the rotary dehumidification device 14 further comprises a rotary dehumidification device reduction part 36 located in the unit return air passage 30 and a rotary dehumidification device dehumidification part 37 located in the unit supply air passage 31; the rotary dehumidification device 14 comprises a rotary wheel 38 and a driving motor 39, and the driving motor 39 drives the rotary wheel 38 to rotate through a belt; the dehumidifier is made of aluminum oxide or a mixture of aluminum oxide and polyacrylic acid.

[0097] The air supply channel 31 is provided with an air inlet A1 and an air supply outlet 27 on the opposite side walls of the casing corresponding to the two ends of the air supply channel 31, and the air supply channel 31 is communicated with the data center air supply channel 43 through the air supply outlet 27; the air supply channel 31 between the air inlet A1 and the air supply outlet 27 is provided with a bag filter 2, a surface cooler 3, a vertical pipe indirect evaporative cooling unit, a dehumidification part 37 of a rotary dehumidification device, a direct evaporative cooling unit, a water baffle B21, an evaporator 25 and an air supply fan 26 in sequence according to the air flow direction;

[0098] The casing 29 corresponding to the vertical pipe indirect evaporative cooling unit is provided with an air outlet A12 on the outer wall, and the casing 29 corresponding to one side of the vertical pipe indirect evaporative cooling unit is provided with an air inlet B5 on the outer wall;

[0099] The casing 29 corresponding to the air supply channel 31 is provided with an air outlet B13 and an air return outlet 28 on the outer wall, and the air supply channel 30 is communicated with the data center air return channel 47 through the air return outlet 28; the air supply channel 30 between the air outlet B13 and the air return outlet 28 is provided with an expansion valve 24, a condenser 23, a compressor 22, an air return fan B15 and a restoration part 36 of a rotary dehumidification device in sequence according to the air flow direction;

[0100] The compressor 22, the condenser 23, the expansion valve 24 and the evaporator 25 are connected in sequence, and the evaporator 25 is also connected with the compressor 22, and the compressor 22, the condenser 23, the expansion valve 24 and the evaporator 25 form a closed loop by a refrigerant pipeline;

[0101] The liquid inlet of the surface cooler 3 is connected with the liquid outlet of the cooling liquid distribution unit 42 through a return water pipeline 40; the liquid outlet of the surface cooler 3 is connected with the third port of a three-way valve 32 through a surface cooler water outlet pipeline 34; the vertical pipe indirect evaporative cooling unit is connected with the second port of the three-way valve 32 through a unit water outlet pipeline 33; and the vertical pipe indirect evaporative cooling unit is also communicated with the surface cooler water outlet pipeline 34 through a first water supply pipeline 50.

[0102] Example 5

[0103] The air supply channel 31 is provided with an air inlet A1 and an air supply outlet 27 on the opposite side walls of the casing corresponding to the two ends of the air supply channel 31, and the air supply channel 31 is communicated with the data center air supply channel 43 through the air supply outlet 27; the air supply channel 31 between the air inlet A1 and the air supply outlet 27 is provided with a bag filter 2, a surface cooler 3, a vertical pipe indirect evaporative cooling unit, a dehumidification part 37 of a rotary dehumidification device, a direct evaporative cooling unit, a water baffle B21, an evaporator 25 and an air supply fan 26 in sequence according to the air flow direction; Figure 1As shown, it comprises a data center return air passage 47 arranged on the top of the data center room, a data center supply air passage 43 formed below the floor of the data center room, and a plurality of cabinet units arranged on the floor of the data center room; each cabinet unit is composed of two cabinets 46, the air inlet sides of the two cabinets 46 in each cabinet unit are arranged oppositely, a cold aisle 49 is formed between the air inlet sides of the two cabinets 46, a cold air outlet is arranged at the corresponding floor grille 44 at the lower part of the cold aisle 49, and the cold aisle 49 is communicated with the data center supply air passage 43 through the cold air outlet; a hot aisle 48 is formed between adjacent two cabinet units, and the hot aisle 48 is communicated with the data center return air passage 47; a cooling liquid distribution unit 42 is further arranged in the data center room.

[0104] The data cabinet 46 is loaded with servers 45.

[0105] It further comprises an air-liquid hybrid refrigeration unit, which is communicated with the data center return air passage 47 and the data center supply air passage 43; the air-liquid hybrid refrigeration unit is connected with the cooling liquid distribution unit 42 through a pipe network assembly.

[0106] The pipe network assembly comprises a return water pipe 40, a water supply pipe 41, and a three-way valve 32; the first end of the return water pipe 40 is connected with the liquid outlet of the cooling liquid distribution unit 42, and the second end of the return water pipe 40 is connected with the air-liquid hybrid refrigeration unit; the first end of the water supply pipe 41 is connected with the liquid inlet of the cooling liquid distribution unit 42, the second end of the water supply pipe 41 is connected with the first port of the three-way valve 32, the second port of the three-way valve 32 is connected with a unit water outlet pipe 33, and the unit water outlet pipe 33 is further connected with the air-liquid hybrid refrigeration unit; the third port of the three-way valve 32 is connected with an air cooler water outlet pipe 34, and the air cooler water outlet pipe 34 is further connected with the air-liquid hybrid refrigeration unit.

[0107] A circulating water pump 35 is arranged on the water supply pipe 41.

[0108] The air-liquid hybrid refrigeration unit comprises a unit shell 29, which is divided into two independent unit return air passages 30 and unit supply air passages 31; the air-liquid hybrid refrigeration unit further comprises a rotary dehumidification device 14, which penetrates the unit return air passages 30 and the unit supply air passages 31; the rotary dehumidification device 14 further comprises a rotary dehumidification device reduction part 36 located in the unit return air passage 30 and a rotary dehumidification device dehumidification part 37 located in the unit supply air passage 31; the rotary dehumidification device 14 comprises a rotary wheel 38 and a driving motor 39, and the driving motor 39 drives the rotary wheel 38 to rotate through a belt; the dehumidifier is made of aluminum oxide or a mixture of aluminum oxide and polyacrylic acid;

[0109] The air supply channel 31 of the unit is provided with an air inlet A1 and an air supply port 27 on the opposite side walls of the shell at both ends, respectively, and the air supply channel 31 of the unit is communicated with the data center air supply channel 43 through the air supply port 27; the air supply channel 31 between the air inlet A1 and the air supply port 27 is provided with a bag filter 2, a surface cooler 3, a vertical pipe indirect evaporative cooling unit, a dehumidification part 37 of a rotary dehumidification device, a direct evaporative cooling unit, a water baffle B21, an evaporator 25 and an air supply fan 26 in sequence according to the air flow direction;

[0110] The outer wall of the unit shell 29 corresponding to the vertical pipe indirect evaporative cooling unit is provided with an air outlet A12, and the outer wall of the unit shell 29 corresponding to one side of the vertical pipe indirect evaporative cooling unit is provided with an air inlet B5;

[0111] The outer wall of the unit shell 29 corresponding to the unit return air channel 30 is provided with an air outlet B13 and a return air port 28, and the unit return air channel 30 is communicated with the data center return air channel 47 through the return air port 28; the unit return air channel 30 between the air outlet B13 and the return air port 28 is provided with an expansion valve 24, a condenser 23, a compressor 22, an air return fan B15 and a restoration part 36 of a rotary dehumidification device in sequence according to the air flow direction;

[0112] The compressor 22, the condenser 23, the expansion valve 24 and the evaporator 25 are connected in sequence, the evaporator 25 is also connected with the compressor 22, and the compressor 22, the condenser 23, the expansion valve 24 and the evaporator 25 form a closed loop by a refrigerant pipeline;

[0113] The liquid inlet of the surface cooler 3 is connected with the liquid outlet of the cooling liquid distribution unit 42 through a return water pipeline 40; the liquid outlet of the surface cooler 3 is connected with the third port of a three-way valve 32 through a surface cooler water outlet pipeline 34; the vertical pipe indirect evaporative cooling unit is connected with the second port of the three-way valve 32 through a unit water outlet pipeline 33; and the vertical pipe indirect evaporative cooling unit is also communicated with the surface cooler water outlet pipeline 34 through a first water supply pipeline 50.

[0114] The first water supply pipeline 50 is provided with a butterfly valve 11.

[0115] Example 6

[0116] The air-liquid mixed refrigeration system for data center based on the rotary dehumidification device, like Figure 1As shown, it comprises a data center return air passage 47 arranged on the top of the data center room, a data center supply air passage 43 formed below the floor of the data center room, and a plurality of cabinet units arranged on the floor of the data center room; each cabinet unit is composed of two cabinets 46, the air inlet sides of the two cabinets 46 in each cabinet unit are arranged oppositely, a cold aisle 49 is formed between the air inlet sides of the two cabinets 46, a cold air outlet is arranged at the corresponding floor grille 44 at the lower part of the cold aisle 49, and the cold aisle 49 is communicated with the data center supply air passage 43 through the cold air outlet; a hot aisle 48 is formed between adjacent two cabinet units, and the hot aisle 48 is communicated with the data center return air passage 47; a cooling liquid distribution unit 42 is further arranged in the data center room.

[0117] The data cabinet 46 is loaded with servers 45.

[0118] It further comprises an air-liquid hybrid refrigeration unit, which is communicated with the data center return air passage 47 and the data center supply air passage 43; the air-liquid hybrid refrigeration unit is connected with the cooling liquid distribution unit 42 through a pipe network assembly.

[0119] The pipe network assembly comprises a return water pipe 40, a water supply pipe 41, and a three-way valve 32; the first end of the return water pipe 40 is connected with the liquid outlet of the cooling liquid distribution unit 42, and the second end of the return water pipe 40 is connected with the air-liquid hybrid refrigeration unit; the first end of the water supply pipe 41 is connected with the liquid inlet of the cooling liquid distribution unit 42, the second end of the water supply pipe 41 is connected with the first port of the three-way valve 32, the second port of the three-way valve 32 is connected with a unit water outlet pipe 33, and the unit water outlet pipe 33 is further connected with the air-liquid hybrid refrigeration unit; the third port of the three-way valve 32 is connected with an air cooler water outlet pipe 34, and the air cooler water outlet pipe 34 is further connected with the air-liquid hybrid refrigeration unit.

[0120] The water supply pipe 41 is provided with a circulating water pump 35.

[0121] The air-liquid hybrid refrigeration unit comprises a unit shell 29, which is divided into two independent unit return air passages 30 and unit supply air passages 31; the air-liquid hybrid refrigeration unit further comprises a rotary dehumidification device 14, which penetrates the unit return air passages 30 and the unit supply air passages 31; the rotary dehumidification device 14 further comprises a rotary dehumidification device reduction part 36 located in the unit return air passage 30 and a rotary dehumidification device dehumidification part 37 located in the unit supply air passage 31; the rotary dehumidification device 14 comprises a rotary wheel 38 and a driving motor 39, and the driving motor 39 drives the rotary wheel 38 to rotate through a belt; the dehumidifier is made of aluminum oxide or a mixture of aluminum oxide and polyacrylic acid;

[0122] The air supply channel 31 is provided with an air inlet A1 and an air supply outlet 27 on the opposite side walls of the shell at both ends, and the air supply channel 31 is communicated with the data center air supply channel 43 through the air supply outlet 27; the air supply channel 31 between the air inlet A1 and the air supply outlet 27 is sequentially provided with a bag filter 2, a surface cooler 3, a vertical pipe indirect evaporative cooling unit, a dehumidification part 37 of a rotary dehumidification device, a direct evaporative cooling unit, a water baffle B21, an evaporator 25 and an air supply fan 26 in the direction of air flow;

[0123] The vertical pipe indirect evaporative cooling unit is provided with an air outlet A12 on the outer wall of the corresponding unit shell 29, and an air inlet B5 is provided on the outer wall of the corresponding unit shell 29 on one side of the vertical pipe indirect evaporative cooling unit.

[0124] The unit return air channel 30 is provided with an air outlet B13 and a return air inlet 28 on the outer wall of the corresponding unit shell 29, and the unit return air channel 30 is communicated with the data center return air channel 47 through the return air inlet 28; the unit return air channel 30 between the air outlet B13 and the return air inlet 28 is sequentially provided with an expansion valve 24, a condenser 23, a compressor 22, an air return fan B15 and a restoration part 36 of a rotary dehumidification device in the direction of air flow;

[0125] The compressor 22, the condenser 23, the expansion valve 24 and the evaporator 25 are sequentially connected, and the evaporator 25 is also connected with the compressor 22, and the compressor 22, the condenser 23, the expansion valve 24 and the evaporator 25 form a closed loop by a refrigerant pipeline;

[0126] The liquid inlet of the surface cooler 3 is connected with the liquid outlet of the cooling liquid distribution unit 42 through a return water pipeline 40; the liquid outlet of the surface cooler 3 is connected with the third port of the three-way valve 32 through a surface cooler water outlet pipeline 34; the vertical pipe indirect evaporative cooling unit is connected with the second port of the three-way valve 32 through a unit water outlet pipeline 33; and the vertical pipe indirect evaporative cooling unit is also communicated with the surface cooler water outlet pipeline 34 through a first water supply pipeline 50.

[0127] The first water supply pipeline 50 is provided with a butterfly valve 11.

[0128] The vertical pipe indirect evaporative cooling unit comprises, from top to bottom, an air return fan A9, a water baffle A8, a spraying device A10, a vertical pipe indirect evaporative cooling heat exchanger 7 and a cold water tank 4;

[0129] The cold water tank 4 is connected with the second port of the three-way valve 32 through a unit water outlet pipeline 33;

[0130] The air outlet A12 is located above the air return fan A9, and the air inlet B5 is located at the outer wall of the corresponding unit shell 29 between the space between the vertical pipe indirect evaporative cooling heat exchanger 7 and the cold water tank 4.

Claims

1. A hybrid air-liquid refrigerant system for a data center based on a rotary dehumidification device, characterized by, The data center return air passage (47) is arranged on the top of the data center room, the data center air supply passage (43) is formed below the floor of the data center room, and a plurality of cabinet units are arranged on the floor of the data center room. The wind-liquid mixed refrigeration unit is connected with the data center return air passage (47) and the data center air supply passage (43).

2. The hybrid air-liquid desiccant wheel based data center cooling system of claim 1, wherein, The pipe network assembly comprises a return water pipeline (40), a water supply pipeline (41) and a three-way valve (32), the first end of the return water pipeline (40) is connected with the liquid outlet of the cooling liquid distribution unit (42), the second end of the return water pipeline (40) is connected with the wind-liquid mixed refrigeration unit, the first end of the water supply pipeline (41) is connected with the liquid inlet of the cooling liquid distribution unit (42), the second end of the water supply pipeline (41) is connected with the first port of the three-way valve (32), the second port of the three-way valve (32) is connected with a unit water outlet pipeline (33), the unit water outlet pipeline (33) is also connected with the wind-liquid mixed refrigeration unit, the third port of the three-way valve (32) is connected with an air cooler water outlet pipeline (34), and the air cooler water outlet pipeline (34) is also connected with the wind-liquid mixed refrigeration unit.

3. The hybrid air-liquid desiccant wheel based data center cooling system of claim 2, wherein, The water supply pipeline (41) is provided with a circulating water pump (35).

4. The hybrid air-liquid desiccant wheel based data center cooling system of claim 3, wherein, The wind-liquid mixed refrigeration unit comprises a unit shell (29), the unit shell (29) is divided into two independent unit return air passages (30) and a unit air supply passage (31) in the unit shell (29), and a rotary dehumidification device (14) is further arranged, the rotary dehumidification device (14) penetrates through the unit return air passage (30) and the unit air supply passage (31), the rotary dehumidification device (14) is arranged in the unit return air passage (30), and the rotary dehumidification device (14) is arranged in the unit air supply passage (31). The air supply channel (31) is provided with an air inlet A (1) and an air outlet (27) on the opposite side walls of the shell at both ends, respectively, and is communicated with the data center air supply channel (43) through the air outlet (27); the air supply channel (31) between the air inlet A (1) and the air outlet (27) is sequentially provided with a bag filter (2), a surface cooler (3), a vertical pipe indirect evaporative cooling unit, a dehumidification part (37) of a rotary dehumidification device, a direct evaporative cooling unit, a water baffle B (21), an evaporator (25) and an air supply fan (26) in the air flow direction; The vertical pipe indirect evaporative cooling unit is provided with an air outlet A (12) on the outer wall of the corresponding unit shell (29) above, and an air inlet B (5) on the outer wall of the corresponding unit shell (29) on one side of the vertical pipe indirect evaporative cooling unit; The outer wall of the corresponding unit shell (29) of the unit return air channel (30) is provided with an air outlet B (13) and a return air inlet (28), and the unit return air channel (30) is communicated with the data center return air channel (47) through the return air inlet (28); the unit return air channel (30) between the air outlet B (13) and the return air inlet (28) is sequentially provided with an expansion valve (24), a condenser (23), a compressor (22), an air outlet B (15) and a restoration part (36) of a rotary dehumidification device in the air flow direction; The compressor (22), the condenser (23), the expansion valve (24) and the evaporator (25) are sequentially connected, and the evaporator (25) is also connected with the compressor (22); The liquid inlet of the surface cooler (3) is connected with the liquid outlet of the cooling liquid distribution unit (42) through the return water pipeline (40); the liquid outlet of the surface cooler (3) is connected with the third port of the three-way valve (32) through the surface cooler water outlet pipeline (34); the vertical pipe indirect evaporative cooling unit is connected with the second port of the three-way valve (32) through the unit water outlet pipeline (33); and the vertical pipe indirect evaporative cooling unit is also communicated with the surface cooler water outlet pipeline (34) through the first water supply pipe (50).

5. The hybrid air-liquid desiccant wheel based data center cooling system of claim 4, wherein, The first water supply pipe (50) is provided with a butterfly valve (11).

6. The hybrid air-liquid desiccant wheel based data center cooling system of claim 4, wherein, The vertical pipe indirect evaporative cooling unit comprises, from top to bottom, an air outlet fan A (9), a water baffle A (8), a spraying device A (10), a vertical pipe indirect evaporative cooling heat exchanger (7) and a cold water tank (4); The cold water tank (4) is connected with the second port of the three-way valve (32) through the unit water outlet pipeline (33); The air outlet A (12) is located above the air outlet fan A (9), and the air inlet B (5) is located at the outer wall of the corresponding unit shell (29) between the space between the vertical pipe indirect evaporative cooling heat exchanger (7) and the cold water tank (4).

7. The hybrid air-liquid desiccant wheel based data center cooling system of claim 6, wherein, The cold water tank (4) is provided with a float valve A (6) therein.

8. The hybrid air-liquid desiccant wheel based data center cooling system of claim 4, wherein, The direct evaporative cooling unit comprises, from top to bottom, a spraying cooling device B (18), a direct evaporative cooling filler (19) and a water storage tank (16); the spraying cooling device B (18) is communicated with the water storage tank (16) through a second water supply pipe (51); and the second water supply pipe (51) is provided with a spraying water pump (17).

9. The hybrid air-liquid desiccant wheel based data center cooling system of claim 8, wherein, The water storage tank (16) is provided with a float valve B (20) therein.

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