Air-liquid mixed refrigerating system based on heat exchange coil in air conditioning unit

Abstract

The utility model discloses an air-liquid mixed refrigerating system based on a heat exchange coil in an air conditioning unit. The air-liquid mixed refrigerating system comprises an air return channel, an air supply channel and a plurality of cabinet units which are arranged at the top in a 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 the floor grating, of the lower portion of the cold channel, and the cold channel is communicated with the 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 air return channel; a cooling liquid distribution unit is also arranged in the data center machine room; the system further comprises an indirect evaporative cooling air conditioning unit, a cooling tower and a pipe network. The indirect evaporative cooling air conditioning unit is communicated with the data center machine room through the first ventilation pipeline and the second ventilation pipeline. The system has the characteristics of prolonging the service time of a natural cold source of the data center cooling system and reducing the energy consumption of the cooling system.

Description

TECHNICAL FIELD

[0001] The utility model belongs to air conditioning equipment technical field, concretely relates to the air and liquid mixed type refrigerating system based on air conditioning unit internal heat exchange coil. BACKGROUND

[0002] With the increasing demand of computing power, the high energy consumption problem of data center cooling system is increasingly prominent, and more and more high-density data centers gradually adopt the form of liquid cooling combined with air cooling to cool the data center. This mixed cooling system can greatly reduce the energy consumption of the data center cooling system and reduce the power consumption of the data center. In addition, with the increasing emphasis on energy saving, environmental protection and sustainable development around the world and the increasing heat generation of single cabinet in data center, the market demand for this cooling form will continue to grow.

[0003] In the traditional cooling form of liquid cooling combined with air cooling, two sets of refrigeration systems are often used to produce cold air and cold water without mutual coupling. The system is complex to install and is not convenient for rapid deployment. At the same time, the cold water equipment is prone to icing, and needs to be defrosted in winter. The ordinary indirect evaporative cooling air handling unit has a relatively short natural cold source use time in areas with high humidity, and the mechanical refrigeration operation time is relatively long. UTILITARY MODEL

[0004] The utility model aims at providing the air and liquid mixed type refrigerating system based on air conditioning unit internal heat exchange coil, has the characteristics of prolonging the natural cold source use time of data center cooling system and reducing the energy consumption of cooling system.

[0005] The utility model adopts the technical scheme, the air and liquid mixed type refrigerating system based on air conditioning unit internal heat exchange coil, including the back air channel that sets up in the data center computer lab top, the air supply channel that forms in the data center computer lab floor below and the multiple cabinet units that set up on the data center computer lab floor, every cabinet unit is by two cabinets, and the air inlet side of two cabinets in every cabinet unit is opposite, and the cold channel is formed between the air inlet side of two cabinets, and the cold air outlet is arranged at the corresponding floor grating of the lower part of cold channel, and the cold channel is communicated with the air supply channel through the cold air outlet, the hot channel is formed between the adjacent two cabinet units, and the hot channel is communicated with the back air channel, and the cooling liquid distribution unit is further arranged in the data center computer lab.

[0006] Further include indirect evaporative cooling air conditioning unit, cooling tower and pipe network, and the indirect evaporative cooling air conditioning unit, cooling tower and cooling liquid distribution unit are connected with the pipe network.

[0007] The indirect evaporative cooling air conditioning unit is communicated with the back air channel through the first ventilation duct, and the indirect evaporative cooling air conditioning unit is communicated with the air supply channel through the second ventilation duct.

[0008] The utility model discloses a feature still lies in:

[0009] The pipe network includes the water outlet pipe of heat exchange coil, pipe D, three-way valve C, pipe C, three-way valve A and water supply pipe that are connected in turn, and one end of the water outlet pipe of heat exchange coil is also connected with the indirect evaporative cooling air conditioning unit, and one end of the water supply pipe is also connected with the water inlet of cooling liquid distribution unit.

[0010] The third port of three-way valve C is communicated with the water outlet pipe of heat exchange coil through bypass pipe.

[0011] The third port of three-way valve A is connected with cooling tower through cooling tower water supply pipe.

[0012] It also includes the water inlet pipe of heat exchange coil, three-way valve B and return pipe that are connected in turn, and one end of the water inlet pipe of heat exchange coil is also connected with the indirect evaporative cooling air conditioning unit, and one end of the return pipe is also connected with the water outlet of cooling liquid distribution unit.

[0013] The third port of three-way valve B is connected with cooling tower through cooling tower spray pipe.

[0014] The water supply pump is arranged on pipe D.

[0015] The spray water pump C is arranged on cooling tower spray pipe.

[0016] The indirect evaporative cooling unit includes unit shell, and the indirect evaporative cooling heat exchange core is arranged in the unit shell, and the indirect evaporative cooling heat exchange core is arranged at 45 degrees in the unit shell, and the indirect evaporative cooling heat exchange core divides the internal space of the unit shell into unit dry channel and unit wet channel, and the unit dry channel and the unit wet channel are cross-distributed, and the corresponding opposite side walls of the unit shell at both ends of the unit dry channel are respectively provided with fresh air outlet and air supply outlet, and the air supply outlet is communicated with air supply channel through second air duct.

[0017] The corresponding side wall and upper wall of the unit shell at both ends of the unit wet channel are respectively provided with exhaust air outlet A and return air inlet, and the return air inlet is communicated with return air channel through first air duct.

[0018] The bag filter A, heat exchange coil, dry channel of indirect evaporative cooling heat exchange core, direct evaporative cooling unit, water baffle A, evaporator and air supply fan are sequentially arranged in the unit dry channel according to the flow direction of air after entering, and the water collecting tray is arranged below the evaporator, and the drain pipe is connected to the water collecting tray.

[0019] The water outlet of heat exchange coil is connected with one end of the water outlet pipe of heat exchange coil, and the water inlet of heat exchange coil is connected with one end of the water inlet pipe of heat exchange coil.

[0020] The air entering machine group wet channel is sequentially provided with a return air fan, a spraying device B, an indirect evaporative cooling heat exchange core wet channel, a water storage tank A, an expansion valve, a condenser, a compressor and a bag filter B in the flow direction of the air; the water storage tank A is provided with a float ball valve A and a spraying water pump A; the spraying water pump A is connected with the spraying device B through a first spraying pipeline; a butterfly valve B is arranged on the first spraying pipeline;

[0021] The compressor, the condenser and the expansion valve are sequentially connected through pipelines; the compressor is further connected with the outlet of the evaporator through a pipeline B; and the expansion valve is further connected with the inlet of the evaporator through a pipeline A.

[0022] The direct evaporative cooling unit comprises a water storage tank B, wherein the water storage tank B is provided with a spraying water pump B and a float ball valve B; a spraying device B and direct evaporative cooling filler A are sequentially arranged above the water storage tank B in the air flow direction; the spraying device A is connected with the spraying water pump B through a second spraying pipeline; and a butterfly valve B is arranged on the second spraying pipeline.

[0023] The cooling tower comprises a cooling tower shell, wherein the cooling tower shell is sequentially provided with an exhaust fan, a water baffle B, a spraying device C, direct evaporative cooling filler B and a chilled water tank from top to bottom; air inlets B are arranged on opposite side walls of the cooling tower shell; filter screens are arranged at the air inlets B; the spraying device C is connected with a cooling tower spraying pipeline; an air outlet B is arranged at the top wall of the cooling tower shell corresponding to the exhaust fan; and the chilled water tank is connected with a third end port of a three-way valve A through a cooling tower water supply pipeline.

[0024] The chilled water tank is provided with a float ball valve C.

[0025] The beneficial effects of the utility model are as follows:

[0026] (1) The refrigeration system of the utility model sets the heat exchange coil in the indirect evaporative cooling air treatment unit, when the outdoor temperature is high, the chilled water in the cooling tower is introduced into the heat exchange coil to precool the air entering the indirect evaporative cooling air treatment unit; when the outdoor temperature is low, the cooling tower is prevented from stopping operation to prevent the circulating water from freezing, and the chilled water is obtained by using the heat exchange coil, which is economical, practical, energy-saving and efficient.

[0027] (2) The refrigeration system of the utility model can simultaneously obtain chilled water and cold air, the chilled water can be directly supplied to the cooling liquid distribution unit, the cold air can be directly applied to the data center machine room cooling, the demand of the data center chilled water and cold air of the liquid cooling system is met, the system structure is simplified, the construction and operation and maintenance costs are reduced, and energy saving and efficiency are high.

[0028] (3) The refrigeration system of the utility model adopts the indirect evaporative cooling heat exchange core, the dry channel air and the wet channel air enter the indirect evaporative cooling heat exchange core in the form of cross flow, which is efficient and energy-saving; the indirect evaporative cooling heat exchange core is small in size, simple in assembly and exquisite in design.

[0029] (4) The air handling unit in the refrigeration system adopts a container form, has high equipment integration degree, is simple to install, and is convenient to transport.

[0030] (5) The air handling unit sets two working modes respectively according to different outdoor working conditions and cooling capacity requirements, uses natural cold source as much as possible, intelligently saves energy, has the characteristics of prolonging the use time of the natural cold source, expanding the use area of the indirect evaporative cooling, and reducing the energy consumption of the cooling system. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structure schematic view of a wind-liquid mixed type refrigeration system based on an internal heat exchanger of an air conditioning unit of the utility model;

[0032] Figure 2 is a mixed cooling mode schematic view of a wind-liquid mixed type refrigeration system based on an internal heat exchanger of an air conditioning unit of the utility model;

[0033] Figure 3 is a wind cooling mode schematic view of a wind-liquid mixed type refrigeration system based on an internal heat exchanger of an air conditioning unit of the utility model.

[0034] In the drawing, 1. exhaust air outlet A, 2. compressor, 3. condenser, 4. expansion valve, 5. float ball valve A, 6. water storage tank A, 7. spray water pump A, 8. spray water pump B, 9. water storage tank B, 10. direct evaporative cooling filler A, 11. float ball valve B, 12. water baffle A, 13. drain pipe, 14. evaporator, 15. water collecting disc, 16. air supply fan, 17. butterfly valve A, 18. spray cooling device A, 19. butterfly valve B, 20. spray device B, 21. indirect evaporative cooling heat exchange core, 22. bag type filter A, 23. fresh air outlet, 24. return air fan, 25. return air outlet, 26. air supply outlet, 27. three-way valve A, 28. water supply pump, 29. three-way valve B, 30. spray water pump C, 31. chilled water tank, 32. direct evaporative cooling filler B, 33. spray device C, 34. water baffle B, 35. exhaust fan, 36. exhaust air outlet B, 37. heat exchange coil, 38. water supply pipeline, 39. water return pipeline, 40. return air passage, 41. air supply passage, 42. cooling liquid distribution unit, 43. float ball valve C, 44. floor grating, 45. server, 46. cabinet, 47. bag type filter B, 48. cooling tower shell, 49. unit shell, 50. air inlet B, 51. three-way valve C, 52. filter screen, 53. pipeline A, 54. pipeline B, 55. hot passage, 56. cold passage, 57. unit wet passage, 58. unit dry passage, 59. cooling tower spray pipeline, 60. heat exchange coil water inlet pipeline, 61. heat exchange coil water outlet pipeline, 62. pipeline C, 63. cooling tower water supply pipeline, 64. bypass pipe, 65. pipeline D. Detailed Implementation

[0035] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0036] This utility model provides a wind-liquid hybrid refrigeration system based on the internal heat exchange coil of an air conditioning unit, such as... Figure 1 As shown, the system includes a return air duct 40 located at the top of the data center, an air supply duct 41 formed beneath the floor of the data center, and multiple cabinet units installed on the floor of the data center. Each cabinet unit consists of two cabinets 46, with the air intake sides of the two cabinets 46 in each unit facing each other, forming a cold aisle 56 between the air intake sides of the two cabinets 46. A cold air outlet is provided at the floor grille 44 corresponding to the lower part of the cold aisle 56, and the cold aisle 56 is connected to the air supply duct 41 through the cold air outlet. A hot aisle 55 is formed between two adjacent cabinet units, and the hot aisle 55 is connected to the return air duct 40. A coolant distribution unit 42 is also provided in the data center. The coolant distribution unit 42 is of type RAL110-04U19, RAA32-10U21, or ROL1100-48U32.

[0037] It also includes an indirect evaporative cooling air conditioning unit, a cooling tower and a pipe network, and the indirect evaporative cooling air conditioning unit, cooling tower and coolant distribution unit 42 are all connected to the pipe network;

[0038] The indirect evaporative cooling air conditioning unit is connected to the return air duct 40 through the first ventilation duct, and the indirect evaporative cooling air conditioning unit is connected to the supply air duct 41 through the second ventilation duct.

[0039] The pipeline network includes heat exchange coil outlet pipe 61, pipe D65, three-way valve C51, pipe C62, three-way valve A27 and water supply pipe 38 connected in sequence. One end of heat exchange coil outlet pipe 61 is also connected to the indirect evaporative cooling air conditioning unit, and one end of water supply pipe 38 is also connected to the inlet of coolant distribution unit 42.

[0040] The third port of the three-way valve C51 is connected to the heat exchange coil outlet pipe 61 through the bypass pipe 64;

[0041] The third port of the three-way valve A27 is connected to the cooling tower via the cooling tower water supply pipe 63;

[0042] It also includes a heat exchange coil inlet pipe 60, a three-way valve B29 and a return water pipe 39 connected in sequence. One end of the heat exchange coil inlet pipe 60 is also connected to the indirect evaporative cooling air conditioning unit, and one end of the return water pipe 39 is also connected to the outlet of the coolant distribution unit 42.

[0043] The third end port of the three-way valve B29 is connected with the cooling tower through the cooling tower spray pipeline 59.

[0044] The water supply pump 28 is arranged on the pipeline D65.

[0045] The spray water pump C30 is arranged on the cooling tower spray pipeline 59.

[0046] The indirect evaporative cooling unit comprises a unit shell 49, and the indirect evaporative cooling heat exchange core 21 is arranged in the unit shell 49. The indirect evaporative cooling heat exchange core 21 is arranged at an angle of 45° in the unit shell 49, and divides the internal space of the unit shell 49 into a unit dry channel 58 and a unit wet channel 57. The unit dry channel 58 and the unit wet channel 57 are cross-distributed. The new air outlet 23 and the air supply outlet 26 are respectively arranged on the two opposite side walls of the unit shell 49 at the two ends of the unit dry channel 58. The air supply outlet 26 is communicated with the air supply channel 41 through the second ventilation pipeline.

[0047] The exhaust air outlet A1 and the return air outlet 25 are respectively arranged on the side wall and the upper wall of the unit shell 49 at the two ends of the unit wet channel 57. The return air outlet 25 is communicated with the return air channel 40 through the first ventilation pipeline.

[0048] The bag filter A22, the heat exchange coil 37, the dry channel of the indirect evaporative cooling heat exchange core 21, the direct evaporative cooling unit, the water baffle A12, the evaporator 14 and the air supply fan 16 are sequentially arranged in the unit dry channel 58 according to the flow direction of the air after entering. The water collecting tray 15 is arranged below the evaporator 14, and the drain pipe 13 is connected to the water collecting tray 15.

[0049] The outlet of the heat exchange coil 37 is connected with one end of the heat exchange coil outlet pipeline 61, and the inlet of the heat exchange coil 37 is connected with one end of the heat exchange coil inlet pipeline 60.

[0050] The return air fan 24, the spray device B20, the wet channel of the indirect evaporative cooling heat exchange core, the water storage tank A6, the expansion valve 4, the condenser 3, the compressor 2 and the bag filter B47 are sequentially arranged in the unit wet channel 57 according to the flow direction of the air after entering. The float valve A5 and the spray water pump A7 are arranged in the water storage tank A6. The spray water pump A7 is connected with the spray device B20 through the first spray pipeline. The butterfly valve B19 is arranged on the first spray pipeline. The spray device B20 comprises a second water distribution pipe, a plurality of spray heads are arranged on the second water distribution pipe, and the spray water pump A7 is connected with the second water distribution pipe through the first spray pipeline.

[0051] The compressor 2, the condenser 3 and the expansion valve 4 are sequentially connected through pipelines. The compressor 2 is also connected with the outlet of the evaporator 14 through the pipeline B54, and the expansion valve 4 is also connected with the inlet of the evaporator 14 through the pipeline A53.

[0052] The direct evaporation cooling unit includes a water storage tank B9, which contains a spray water pump B8 and a float valve B11. Above the water storage tank B9, in the direction of airflow, are a spray device A18 and direct evaporation cooling packing A10. The spray device A18 is connected to the spray water pump B8 via a second spray pipe, which is equipped with a butterfly valve B17. The spray device A18 includes a first water distribution pipe with several nozzles, which is connected to the spray water pump B8 via the second spray pipe.

[0053] The cooling tower includes a cooling tower shell 48. Inside the cooling tower shell 48, from top to bottom, are arranged an exhaust fan 35, a baffle plate B34, a spray device C33, direct evaporative cooling packing material B32, and a chilled water tank 31. Air inlets B50 are provided on both opposite side walls of the cooling tower shell 48, and filters 52 are installed at each air inlet B50. The spray device C33 is connected to the cooling tower spray pipe 59. An exhaust port B36 is provided on the top wall of the cooling tower shell 48 above the exhaust fan 35. The chilled water tank 31 is connected to the third port of a three-way valve A27 via a cooling tower water supply pipe 63. The spray device C33 includes a third water distribution pipe with several nozzles installed on it, and the third water distribution pipe is connected to the cooling tower spray pipe 59.

[0054] A float valve C43 is installed in the chilled water tank 31.

[0055] The working principle of the cooling tower in the air-liquid mixing refrigeration system based on the internal heat exchanger of the air conditioning unit is as follows:

[0056] like Figure 1 As shown, in the cooling tower of the air-liquid mixing refrigeration system based on the heat exchanger inside the air conditioning unit, outdoor air enters the cooling tower through the air inlets B50 on both sides of the cooling tower shell 48 under the action of the exhaust fan 35. In the cooling tower, the air passes through the evaporative cooling packing B32 and undergoes direct evaporative cooling with the cooling return water in the packing, carrying away the heat from the cooling return water. After passing through the spray device C33, the baffle plate B34, and the exhaust fan 35, it is discharged to the outside through the exhaust port B36. The cooling return water passes through the spray device C33 and is sprayed into the direct evaporative cooling packing B32, where it undergoes direct evaporative cooling with the outdoor air entering the unit and is cooled and stored in the cold water tank.

[0057] This utility model's refrigeration system has two modes based on the outdoor temperature:

[0058] (1) Hybrid cooling mode

[0059] When outdoor temperatures are high, the system operates in hybrid cooling mode. For example... Figure 2As shown, cooling tower, mechanical refrigeration device, direct evaporative cooling unit operation; data center machine room cooling liquid distribution unit 42 backwater through backwater pipe 39, three-way valve B29, cooling tower spray pipe 59 and cooling tower spray pipe in the spray water pump C30 to reach the spray device C33, after the cooling tower is cooled, through the cooling tower water supply pipe 63, three-way valve A27, water supply pipe 38 back to the cooling liquid distribution unit 42, so as to form a cycle;

[0060] At the same time, the cooling tower in the chilled water tank 31 in the cooling water through the cooling tower water supply pipe 63, three-way valve A27, three-way valve C51, bypass pipe 64, heat exchange coil inlet pipe 61 to reach the heat exchange coil 37 in the indirect evaporative cooling air conditioning unit, the air in the unit dry channel 58 is pre-cooled, and then passes through the heat exchange coil inlet pipe 60, three-way valve B29, cooling tower spray pipe 59 and cooling tower spray pipe in the spray water pump 30 to reach the spray device C33, after the cooling tower is cooled, back to the chilled water tank 31, so as to form a cycle;

[0061] In the indirect evaporative cooling air conditioning unit, the indoor return air enters the unit wet channel 57 under the action of the return air fan 24, passes through the indirect evaporative cooling heat exchange core 21 in the unit wet channel 57, and is directly evaporatively cooled with the water sprayed by the spray device B20 and heat exchanged with the dry channel air, so that the air temperature is reduced, and then passes through the expansion valve 4, the condenser 3, the compressor 2, the bag filter B47 and the air outlet 1 to be discharged to the outdoor atmosphere. At the same time, when passing through the condenser 3, the condenser 3 is cooled; the water in the water storage tank A6 is pumped to the spray device B20 by the spray water pump A7, sprayed into the wet channel of the indirect evaporative cooling heat exchange core 21, directly evaporatively cooled with the air entering the wet channel part of the indirect evaporative cooling heat exchange core 21, and the temperature is reduced to the wet bulb temperature of the return air;

[0062] Outdoor fresh air, driven by the blower 16, enters the dry duct 58 of the indirect evaporative cooling air conditioning unit through the fresh air inlet 23 and bag filter A22. It then pre-cools the outdoor fresh air via the heat exchange coil 37, and subsequently exchanges heat with the air in the wet duct of the indirect evaporative cooling heat exchange core 21, resulting in isohumid cooling. The air is cooled to its wet-bulb temperature when it entered the dry duct of the indirect evaporative cooling heat exchange core 21, and then passes through the direct evaporative cooling section. Water in the water tank B9 is drawn to the spray device A18 by the spray pump B8 and sprayed onto the direct evaporative cooling packing 10. The air entering the direct evaporative cooling section then undergoes direct evaporative cooling. Water in the evaporative cooling packing A10 undergoes direct evaporative cooling, and its temperature is reduced to the wet-bulb temperature of the air at the dry channel outlet of the indirect evaporative cooling heat exchange core 21. It then passes through the baffle plate A12 and the evaporator 14 of the mechanical refrigeration section for cooling and dehumidification. Finally, it is sent to the air supply channel 41 of the data center computer room by the blower 16. In the mechanical refrigeration section, the high-temperature and high-pressure gaseous refrigerant of the compressor 2 passes through the refrigerant pipeline to the condenser coil 3, where it is cooled into liquid refrigerant. After passing through the expansion valve 4, it reaches the evaporator 14, where it absorbs heat and becomes gaseous refrigerant. Finally, it returns to the compressor 2, and the cycle continues.

[0063] The air supplied to the data center server room air supply duct 41 passes through the floor grille 44 into the cold aisle 56, then passes through the data cabinet 46 to cool the servers 45 installed therein, before entering the hot aisle 55, and finally returns to the indirect evaporative cooling air conditioning unit through the return air duct 40, thus circulating in this way.

[0064] (2) Air-cooled mode

[0065] When the outdoor temperature is very low, it operates in air-cooling mode. For example... Figure 3 As shown, the cooling tower, mechanical refrigeration unit (which includes a compressor 2, condenser 3, expansion valve 4, evaporator 14 connected in sequence by pipes, as well as pipe B54 connecting the compressor and the evaporator and pipe A53 connecting the expansion valve and the evaporator), and direct evaporative cooling unit are not in operation; the cooling return water from the coolant distribution unit 42 in the data center computer room enters the indirect evaporative cooling unit and its dry channel 58 through the return water pipe 39, three-way valve B29, and heat exchange coil inlet pipe 60 to exchange heat with the air in the unit. After being cooled, it returns to the coolant distribution unit 42 through the heat exchange coil outlet pipe 61, pipe D65, and the water supply pump 28, three-way valve C51, pipe C62, three-way valve A27, and water supply pipe 38 installed therein, and the cycle continues.

[0066] In the indirect evaporative cooling air conditioning unit, the indoor return air enters the unit wet channel 57 through the return air inlet 25 under the action of the return air fan 24, and is cooled by the indirect evaporative cooling heat exchange core 21 in the unit wet channel 57. The water sprayed by the spraying device B20 in the indirect evaporative cooling heat exchange core 21 is directly evaporated and cooled, and then the air is cooled by the expansion valve 4, the condenser 3, the compressor 2, the bag filter B and the air outlet 1, and then discharged to the outdoor atmosphere. The water in the water storage tank A6 is pumped to the spraying device B20 by the spraying water pump A7, and is directly evaporated and cooled with the air entering the wet channel of the indirect evaporative cooling heat exchange core 21, and the temperature is reduced to the wet bulb temperature of the return air.

[0067] The outdoor fresh air enters the indirect evaporative cooling air conditioning unit dry channel 58 through the fresh air inlet 23 and the bag filter A22 under the action of the air supply fan 16, and then cools the water in the heat exchange coil 37. The air is cooled by the indirect evaporative cooling heat exchange core 21 in the dry channel of the indirect evaporative cooling heat exchange core 21, and the air is cooled to the wet bulb temperature of the air entering the dry channel of the indirect evaporative cooling heat exchange core 21. Then, the air is cooled by the direct evaporative cooling filler A10, the water baffle A12, the evaporator 14 and the air supply fan 16, and then sent to the data center room air supply channel 41.

[0068] The air sent into the data center room air supply channel 41 enters the cold channel 56 through the floor grille 44, and then cools the servers 45 loaded in the data cabinet 46, and then enters the hot channel 55, and finally returns to the indirect evaporative cooling air conditioning unit through the return air channel 40. Thus, the cycle is repeated.

[0069] Embodiment 1

[0070] The air-liquid mixed refrigeration system based on the heat exchange coil in the air conditioning unit, as shown in Figure 1 The air-liquid mixed refrigeration system based on the heat exchange coil in the air conditioning unit, as shown in

[0071] Further comprising an indirect evaporative cooling air conditioning unit, a cooling tower and a pipe network, the indirect evaporative cooling air conditioning unit, the cooling tower and the cooling liquid distribution unit 42 are connected with the pipe network;

[0072] The indirect evaporative cooling air conditioning unit is connected with the return air passage 40 through a first air duct, and is connected with the supply air passage 41 through a second air duct.

[0073] Embodiment 2

[0074] Based on the air conditioning unit internal heat exchange coil, the air-liquid mixed refrigeration system, as shown in Figure 1 The return air passage 40 is arranged on the top of the data center room, the supply air passage 41 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. 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 passage 56 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 passage 56, the cold passage 56 is connected with the supply air passage 41 through the cold air outlet, a hot passage 55 is formed between adjacent two cabinet units, the hot passage 55 is connected with the return air passage 40, and a cooling liquid distribution unit 42 is further arranged in the data center room. The cooling liquid distribution unit 42 is RAA32-10U21 type.

[0075] Further comprising an indirect evaporative cooling air conditioning unit, a cooling tower and a pipe network, the indirect evaporative cooling air conditioning unit, the cooling tower and the cooling liquid distribution unit 42 are connected with the pipe network;

[0076] The indirect evaporative cooling air conditioning unit is connected with the return air passage 40 through a first air duct, and is connected with the supply air passage 41 through a second air duct.

[0077] Embodiment 3

[0078] Based on the air conditioning unit internal heat exchange coil, the air-liquid mixed refrigeration system, as shown in Figure 1 The return air passage 40 is arranged on the top of the data center room, the supply air passage 41 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. 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 passage 56 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 passage 56, the cold passage 56 is connected with the supply air passage 41 through the cold air outlet, a hot passage 55 is formed between adjacent two cabinet units, the hot passage 55 is connected with the return air passage 40, and a cooling liquid distribution unit 42 is further arranged in the data center room. The cooling liquid distribution unit 42 is ROL1100-48U32 type.

[0079] The indirect evaporative cooling air conditioning unit, the cooling tower and the pipe network are connected with the pipe network;

[0080] The indirect evaporative cooling air conditioning unit is connected with the return air passage 40 through the first air duct, and the indirect evaporative cooling air conditioning unit is connected with the supply air passage 41 through the second air duct.

[0081] Embodiment 4

[0082] The air-liquid mixed refrigeration system based on the heat exchange coil inside the air conditioning unit, as shown in Figure 1 The air-liquid mixed refrigeration system based on the heat exchange coil inside the air conditioning unit, as shown in

[0083] The indirect evaporative cooling air conditioning unit, the cooling tower and the pipe network are connected with the pipe network;

[0084] The indirect evaporative cooling air conditioning unit is connected with the return air passage 40 through the first air duct, and the indirect evaporative cooling air conditioning unit is connected with the supply air passage 41 through the second air duct.

[0085] The pipe network comprises a heat exchange coil outlet water pipe 61, a pipe D65, a three-way valve C51, a pipe C62, a three-way valve A27 and a water supply pipe 38 connected in sequence, one end of the heat exchange coil outlet water pipe 61 is further connected with the indirect evaporative cooling air conditioning unit, and one end of the water supply pipe 38 is further connected with a water inlet of the cooling liquid distribution unit 42;

[0086] The third port of the three-way valve C51 is connected with the heat exchange coil outlet water pipe 61 through a bypass pipe 64;

[0087] The third port of the three-way valve A27 is connected with the cooling tower through a cooling tower water supply pipe 63;

[0088] It also includes a heat exchange coil inlet pipe 60, a three-way valve B29 and a return water pipe 39 connected in sequence. One end of the heat exchange coil inlet pipe 60 is also connected to the indirect evaporative cooling air conditioning unit, and one end of the return water pipe 39 is also connected to the outlet of the coolant distribution unit 42.

[0089] The third port of the three-way valve B29 is connected to the cooling tower through the cooling tower spray pipe 59.

[0090] Example 5

[0091] Air-liquid mixing refrigeration system based on the internal heat exchange coil of the air conditioning unit, such as Figure 1 As shown, the data center includes a return air duct 40 located at the top of the room, an air supply duct 41 formed beneath the floor, and multiple cabinet units on the floor. Each cabinet unit consists of two cabinets 46, with their air intake sides facing each other. A cold aisle 56 is formed between the air intake sides of the two cabinets 46, and a cold air outlet is located at the floor grille 44 corresponding to the lower part of the cold aisle 56. The cold aisle 56 is connected to the air supply duct 41 through the cold air outlet. A hot aisle 55 is formed between two adjacent cabinet units and is connected to the return air duct 40. A coolant distribution unit 42 is also provided in the data center. The coolant distribution unit 42 is of type ROL1100-48U32.

[0092] It also includes an indirect evaporative cooling air conditioning unit, a cooling tower and a pipe network, and the indirect evaporative cooling air conditioning unit, cooling tower and coolant distribution unit 42 are all connected to the pipe network;

[0093] The indirect evaporative cooling air conditioning unit is connected to the return air duct 40 through the first ventilation duct, and the indirect evaporative cooling air conditioning unit is connected to the supply air duct 41 through the second ventilation duct.

[0094] The pipeline network includes heat exchange coil outlet pipe 61, pipe D65, three-way valve C51, pipe C62, three-way valve A27 and water supply pipe 38 connected in sequence. One end of heat exchange coil outlet pipe 61 is also connected to the indirect evaporative cooling air conditioning unit, and one end of water supply pipe 38 is also connected to the inlet of coolant distribution unit 42.

[0095] The third port of the three-way valve C51 is connected to the heat exchange coil outlet pipe 61 through the bypass pipe 64;

[0096] The third port of the three-way valve A27 is connected to the cooling tower via the cooling tower water supply pipe 63;

[0097] It also includes a heat exchange coil inlet pipe 60, a three-way valve B29 and a return water pipe 39 connected in sequence. One end of the heat exchange coil inlet pipe 60 is also connected to the indirect evaporative cooling air conditioning unit, and one end of the return water pipe 39 is also connected to the outlet of the coolant distribution unit 42.

[0098] The third port of the three-way valve B29 is connected to the cooling tower through the cooling tower spray pipe 59.

[0099] A water pump 28 is installed on pipe D65.

[0100] Example 6

[0101] Air-liquid mixing refrigeration system based on the internal heat exchange coil of the air conditioning unit, such as Figure 1 As shown, the data center includes a return air duct 40 located at the top of the room, an air supply duct 41 formed beneath the floor, and multiple cabinet units on the floor. Each cabinet unit consists of two cabinets 46, with their air intake sides facing each other. A cold aisle 56 is formed between the air intake sides of the two cabinets 46, and a cold air outlet is located at the floor grille 44 corresponding to the lower part of the cold aisle 56. The cold aisle 56 is connected to the air supply duct 41 through the cold air outlet. A hot aisle 55 is formed between two adjacent cabinet units and is connected to the return air duct 40. A coolant distribution unit 42 is also provided in the data center. The coolant distribution unit 42 is of type ROL1100-48U32.

[0102] It also includes an indirect evaporative cooling air conditioning unit, a cooling tower and a pipe network, and the indirect evaporative cooling air conditioning unit, cooling tower and coolant distribution unit 42 are all connected to the pipe network;

[0103] The indirect evaporative cooling air conditioning unit is connected to the return air duct 40 through the first ventilation duct, and the indirect evaporative cooling air conditioning unit is connected to the supply air duct 41 through the second ventilation duct.

[0104] The pipeline network includes heat exchange coil outlet pipe 61, pipe D65, three-way valve C51, pipe C62, three-way valve A27 and water supply pipe 38 connected in sequence. One end of heat exchange coil outlet pipe 61 is also connected to the indirect evaporative cooling air conditioning unit, and one end of water supply pipe 38 is also connected to the inlet of coolant distribution unit 42.

[0105] The third port of the three-way valve C51 is connected to the heat exchange coil outlet pipe 61 through the bypass pipe 64;

[0106] The third port of the three-way valve A27 is connected to the cooling tower via the cooling tower water supply pipe 63;

[0107] The water inlet pipeline 60 of the heat exchange coil, the three-way valve B29 and the water return pipeline 39 are sequentially connected, one end of the water inlet pipeline 60 of the heat exchange coil is further connected with the indirect evaporative cooling air conditioning unit, and one end of the water return pipeline 39 is further connected with the water outlet of the cooling liquid distribution unit 42.

[0108] The third end port of the three-way valve B29 is connected with the cooling tower through the cooling tower spray pipeline 59.

[0109] The water supply pump 28 is arranged on the pipeline D65.

[0110] The spray water pump C30 is arranged on the cooling tower spray pipeline 59.

Claims

1. A wind-liquid hybrid refrigeration system based on the internal heat exchange coil of an air conditioning unit, characterized in that, It includes a return air duct (40) located at the top of the data center computer room, an air supply duct (41) formed under the floor of the data center computer room, and multiple cabinet units located on the floor of the data center computer room; each cabinet unit consists of two cabinets (46), with the air intake sides of the two cabinets (46) in each cabinet unit facing each other, forming a cold aisle (56) between the air intake sides of the two cabinets (46), and a cold air outlet is provided at the floor grille (44) corresponding to the lower part of the cold aisle (56), and the cold aisle (56) is connected to the air supply duct (41) through the cold air outlet; a hot aisle (55) is formed between two adjacent cabinet units, and the hot aisle (55) is connected to the return air duct (40); a coolant distribution unit (42) is also provided in the data center computer room. It also includes an indirect evaporative cooling air conditioning unit, a cooling tower and a pipe network, and the indirect evaporative cooling air conditioning unit, the cooling tower and the coolant distribution unit (42) are all connected to the pipe network; The indirect evaporative cooling air conditioning unit is connected to the return air channel (40) through the first ventilation duct, and the indirect evaporative cooling air conditioning unit is connected to the supply air channel (41) through the second ventilation duct.

2. The air-liquid hybrid refrigeration system based on the internal heat exchange coil of an air conditioning unit according to claim 1, characterized in that, The pipeline network includes a heat exchange coil outlet pipe (61), pipe D (65), three-way valve C (51), pipe C (62), three-way valve A (27) and water supply pipe (38) connected in sequence. One end of the heat exchange coil outlet pipe (61) is also connected to the indirect evaporative cooling air conditioning unit, and one end of the water supply pipe (38) is also connected to the inlet of the coolant distribution unit (42). The third port of the three-way valve C (51) is connected to the heat exchange coil outlet pipe (61) through the bypass pipe (64); The third port of the three-way valve A (27) is connected to the cooling tower via the cooling tower water supply pipe (63); It also includes a heat exchange coil inlet pipe (60), a three-way valve B (29) and a return water pipe (39) connected in sequence. One end of the heat exchange coil inlet pipe (60) is also connected to the indirect evaporative cooling air conditioning unit, and one end of the return water pipe (39) is also connected to the outlet of the coolant distribution unit (42). The third port of the three-way valve B (29) is connected to the cooling tower through the cooling tower spray pipe (59).

3. The air-liquid hybrid refrigeration system based on the internal heat exchange coil of an air conditioning unit according to claim 2, characterized in that, A water pump (28) is installed on the pipeline D (65).

4. The air-liquid hybrid refrigeration system based on the internal heat exchange coil of an air conditioning unit according to claim 2, characterized in that, A spray water pump C (30) is installed on the spray pipe (59) of the cooling tower.

5. The air-liquid hybrid refrigeration system based on the internal heat exchange coil of an air conditioning unit according to claim 2, characterized in that, The indirect evaporative cooling air conditioning unit includes a unit shell (49), and an indirect evaporative cooling heat exchange core (21) is provided inside the unit shell (49). The indirect evaporative cooling heat exchange core (21) is set at 45° inside the unit shell (49). The indirect evaporative cooling heat exchange core (21) divides the internal space of the unit shell (49) into a unit dry channel (58) and a unit wet channel (57). The unit dry channel (58) and the unit wet channel (57) are distributed in a cross pattern. Fresh air inlets (23) and air outlets (26) are respectively provided on the two opposite side walls of the unit shell (49) at both ends of the unit dry channel (58). The air outlets (26) are connected to the air supply channel (41) through a second ventilation duct. The unit's wet passage (57) has exhaust port A (1) and return air port (25) respectively on the side wall and top wall of the unit casing (49) at both ends; the return air port (25) is connected to the return air passage (40) through the first ventilation duct; The unit's main channel (58) is arranged in sequence according to the air flow direction after it enters, including bag filter A (22), heat exchange coil (37), the main channel of indirect evaporative cooling heat exchange core (21), direct evaporative cooling unit, baffle plate A (12), evaporator (14) and blower (16). A water collection tray (15) is set below the evaporator (14), and a drain pipe (13) is connected to the water collection tray (15). The outlet of the heat exchange coil (37) is connected to one end of the heat exchange coil outlet pipe (61), and the inlet of the heat exchange coil (37) is connected to one end of the heat exchange coil inlet pipe (60). The unit's wet passage (57) is arranged in sequence according to the air flow direction after it enters, including a return air fan (24), a spray device B (20), a wet passage of an indirect evaporative cooling heat exchange core, a water storage tank A (6), an expansion valve (4), a condenser (3), a compressor (2), and a bag filter B (47); the water storage tank A (6) is equipped with a float valve A (5) and a spray water pump A (7); the spray water pump A (7) is connected to the spray device B (20) through the first spray pipe; the first spray pipe is equipped with a butterfly valve B (19); The compressor (2), condenser (3) and expansion valve (4) are connected in sequence by pipes. The compressor (2) is also connected to the evaporator (14) by pipe B (54), and the expansion valve (4) is also connected to the evaporator (14) by pipe A (53).

6. The air-liquid hybrid refrigeration system based on the internal heat exchange coil of an air conditioning unit according to claim 5, characterized in that, The direct evaporation cooling unit includes a water storage tank B (9), a spray water pump B (8) and a float valve B (11) are installed in the water storage tank B (9); a spray device B (20) and a direct evaporation cooling packing A (10) are arranged in sequence above the water storage tank B (9) in the direction of air flow. The spray device A (18) is connected to the spray water pump B (8) through a second spray pipe, and a butterfly valve B (19) is installed on the second spray pipe.

7. The air-liquid hybrid refrigeration system based on the internal heat exchange coil of an air conditioning unit according to claim 5, characterized in that, The cooling tower includes a cooling tower shell (48), and inside the cooling tower shell (48) are arranged from top to bottom an exhaust fan (35), a baffle plate B (34), a spray device C (33), a direct evaporation cooling packing B (32), and a chilled water tank (31); air inlets B (50) are provided on both opposite side walls of the cooling tower shell (48), and filters (52) are provided at each air inlet B (50); the spray device C (33) is connected to the cooling tower spray pipe (59); an exhaust port B (36) is provided on the top wall of the cooling tower shell (48) above the exhaust fan (35); the chilled water tank (31) is connected to the third end port of the three-way valve A (27) through the cooling tower water supply pipe (63).

8. The air-liquid hybrid refrigeration system based on the internal heat exchange coil of an air conditioning unit according to claim 7, characterized in that, A float valve C (43) is installed in the chilled water tank (31).

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