Data center air conditioning system

Abstract

The utility model discloses a data center air conditioning system which comprises a fresh air channel, a longitudinal partition plate is arranged in the fresh air channel, a fresh air valve module is arranged on the longitudinal partition plate, a plurality of indirect evaporation heat exchange cores are arranged on the longitudinal partition plate, and a primary air channel and a secondary air channel are arranged in each indirect evaporation heat exchange core. A machine room and a ventilation chamber are arranged on the two sides of the fresh air channel respectively, a plurality of indoor air supply modules are arranged between the machine room and the fresh air channel, a plurality of outdoor air supply modules are arranged between the ventilation chamber and the fresh air channel, and a plurality of air conditioning units and a plurality of direct evaporative coolers are arranged in the fresh air channel. The indirect evaporative cooling technology, the direct evaporative cooling technology and the fresh air technology are combined, the evaporator and the condenser are designed to be openable and can be opened when not used, wind resistance is reduced, power consumption of an air conditioning unit is reduced, and therefore heat dissipation energy consumption of the data center is reduced, energy is saved to the maximum degree, and energy conservation is achieved. And the energy-saving requirements of large, medium and small data centers can be met.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration equipment, and in particular relates to an air-conditioning system for a data center. Background Art

[0002] A data center, commonly known as a computer room, is a complex set of facilities. It encompasses not only computer systems and supporting equipment (such as communications and storage systems), but also redundant data communication connections, environmental control equipment, monitoring devices, and various safety features. In existing data centers, energy costs account for a significant portion of computer room operating expenses. A portion of the electricity is used for IT loads, while the remainder is used for infrastructure such as power supply and cooling systems.

[0003] Among them, utilizing outdoor fresh air for natural cooling is an energy-saving mode for computer rooms, attracting significant attention for its significant energy-saving benefits. However, in dry northern regions, when computer room equipment uses outdoor air for cooling, if the outdoor fresh air is not humidified after entering the room, it can negatively impact the operation of the computer room and even cause the room to malfunction and cease operation. However, when the outdoor fresh air is humidified, the energy saved is almost equal to the energy consumed by the humidification required to maintain the relative humidity indoors, as well as the energy consumed by the air supply and exhaust systems. This comprehensive analysis of the pros and cons shows that using direct outdoor air for cooling does not offer significant energy savings, is complex to control, and requires extensive humidification. Utility Model Content

[0004] The purpose of the present invention is to provide a data center air conditioning system to solve the above-mentioned problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a data center air-conditioning system, comprising a fresh air duct, a computer room and an outdoor platform area, a longitudinal partition is provided in the fresh air duct, a fresh air valve module is provided on the longitudinal partition, an indoor air supply area is provided between one side of the longitudinal partition and the computer room, an outdoor air supply area is provided between the other side of the longitudinal partition and the outdoor platform area, a plurality of indirect evaporative heat exchange cores are provided on the longitudinal partition, the indirect evaporative heat exchange core is equipped with a spray device, a primary air channel and a secondary air channel capable of heat exchange are provided inside the indirect evaporative heat exchange core, a primary air inlet and a primary air outlet are provided at both ends of the primary air channel respectively, the primary air inlet and the primary air outlet are both connected to the indoor air supply area, and the secondary air channel A secondary air inlet and a secondary air outlet are respectively provided at both ends, and the secondary air inlet and the secondary air outlet are connected to the outdoor air supply area; a number of indoor air supply modules are provided on the partition wall between the machine room and the indoor air supply area, and the indoor air supply module is used to transport the air discharged from the primary air outlet to the machine room through the indoor air supply area, and transport the air discharged from the machine room to the primary air inlet, forming an internal circulation; a number of outdoor air supply modules are provided on the partition wall between the outdoor platform area and the outdoor air supply area, and the outdoor air supply module is used to transport the fresh air from the outdoor platform area to the secondary air inlet through the outdoor air supply area, and transport the air discharged from the secondary air outlet to the outside of the fresh air duct, forming an external circulation; a number of air-conditioning units and a number of direct evaporative coolers are provided in the fresh air duct.

[0006] As an optional implementation of the above technical solution, the air-conditioning unit includes a compressor, an evaporator, an expansion valve and a condenser. The compressor, evaporator, expansion valve and condenser are connected by pipelines to form a closed loop. The evaporator is movably arranged at the primary air outlet position, and the condenser is movably arranged at the secondary air outlet position.

[0007] As an optional implementation of the above technical solution, the evaporator is rotatably arranged on the side wall of the primary air outlet, and the evaporator is connected to a first driving mechanism, which is used to drive the evaporator to rotate into the primary air outlet to cool the primary air, or drive the evaporator to rotate away from the primary air outlet to reduce the wind resistance of the primary air; the condenser is rotatably arranged on the side wall of the secondary air outlet, and the condenser is connected to a second driving mechanism, which is used to drive the condenser to rotate into the secondary air outlet to use the secondary air to dissipate heat from the condenser, or drive the condenser to rotate away from the secondary air outlet to reduce the wind resistance of the secondary air.

[0008] As an optional implementation scheme of the above technical solution, a transverse partition is provided in the machine room, and the upper and lower sides of the transverse partition are respectively provided with an upper space and a lower space that are interconnected, and one end of the transverse partition is provided with a connecting plate extending into the indoor air supply area and connected to the longitudinal partition, and the connecting plate is provided with a return air valve for connecting the upper space and the lower space in the indoor air supply area; the upper space is connected to the upper space of the indoor air supply area, and the primary air inlet is arranged in the upper space of the indoor air supply area and is equipped with an upper air valve; an indoor air supply module is arranged between the lower space and the lower space of the indoor air supply area, and the primary air outlet is arranged in the lower space of the indoor air supply area and is equipped with a lower air valve.

[0009] As an optional implementation of the above technical solution, the outdoor platform area is provided with a ventilation shaft and an exhaust duct, the secondary air inlet is provided with an electric sealing air valve, the secondary air outlet is connected to the ventilation shaft through the exhaust duct, and the exhaust duct is equipped with a check valve.

[0010] As an optional implementation scheme of the above technical solution, the fresh air valve module includes a fresh air inlet valve and a fresh air exhaust valve, and the fresh air inlet valve and the fresh air exhaust valve are both arranged on the longitudinal partition. The fresh air inlet valve is used to transport the fresh air from the outdoor air supply area to the indoor air supply area, and the fresh air exhaust valve is used to transport the air from the indoor air supply area to the outdoor air supply area. The fresh air inlet valve on the bottom layer is used to realize the small fresh air function of the computer room when it is started alone.

[0011] As an optional implementation of the above technical solution, the direct evaporative cooler is a wet film humidifier, and the wet film humidifier is arranged in the indoor air supply area.

[0012] As an optional implementation of the above technical solution, the indoor air supply module includes an indoor air supply fan, which is arranged on the partition wall between the machine room and the indoor air supply area; the outdoor air supply module includes an outdoor air supply fan, which is arranged on the partition wall between the outdoor platform area and the outdoor air supply area.

[0013] As an optional implementation of the above technical solution, the spray device includes a water collecting tray, a water pump and a nozzle. The water collecting tray is arranged below the indirect evaporative heat exchange core, and the water pump is arranged in the water collecting tray. The water pump is used to transport the water in the water collecting tray to the nozzle, so that the nozzle generates water mist and sprays it onto the indirect evaporative heat exchange core.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a data center air conditioning system, which uses evaporative cooling and natural cooling source technology, combines indirect evaporative cooling technology, direct evaporative cooling technology and fresh air technology, reduces the power consumption of air conditioning units, thereby reducing the heat dissipation energy consumption of the data center, achieving maximum energy saving, and can meet the energy saving requirements of large, medium and small data centers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the planar layout structure of a data center air conditioning system in one embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the cross-sectional layout structure of a data center air conditioning system in one embodiment of the present invention;

[0018] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0019] In the figure: 1-fresh air duct; 2-indirect evaporative heat exchange core; 3-spraying device; 4-machine room; 5-outdoor platform area; 6-indoor air supply module; 7-outdoor air supply module; 8-compressor; 9-evaporator; 10-condenser; 11-horizontal partition; 12-upper air valve; 13-lower air valve; 14-ventilation shaft; 15-exhaust duct; 16-electric sealing air valve; 17-check valve; 18-wet film humidifier; 19-fresh air valve module. DETAILED DESCRIPTION

[0020] like Figure 1-Figure 3As shown, this embodiment provides a data center air conditioning system, including a fresh air duct 1, a computer room 4, and an outdoor platform area 5. The data center building has a multi-story structure, with each floor being equipped with a fresh air duct 1, a computer room 4, and an outdoor platform area 5. Cabinets are arranged within the computer room 4 to form a data center. A longitudinal partition is provided within the fresh air duct 1, on which a fresh air valve module 19 is installed. An indoor air supply area is defined between one side of the longitudinal partition and the computer room 4, and an outdoor air supply area is defined between the other side of the longitudinal partition and the outdoor platform area 5. Several indirect evaporative heat exchange cores 2 are provided on the longitudinal partition, each equipped with a spray device 3. The indirect evaporative heat exchange cores 2 are internally provided with primary and secondary air channels capable of heat exchange. A primary air inlet and a primary air outlet are provided at each end of the primary air duct, both of which are connected to the indoor air supply area. The indirect evaporative heat exchange core 2 is a unique iso-humidity cooling method for evaporative cooling. Its basic principle is to use the secondary air and water after direct evaporative cooling to exchange heat with the outdoor air, achieving primary air cooling. Because the air does not come into direct contact with the water, its moisture content remains unchanged, and the primary air temperature change process is an iso-humidity cooling process. Indirect evaporative cooling technology draws cooling energy from the natural environment. Compared with conventional mechanical refrigeration, it can save 80% to 90% in hot and dry areas, 20% to 25% in hot and humid areas, and 40% in moderately humid areas, significantly reducing air conditioning energy consumption.

[0021] A secondary air inlet and a secondary air outlet are respectively provided at both ends of the secondary air channel, and both the secondary air inlet and the secondary air outlet are connected to the outdoor air supply area; a number of indoor air supply modules 6 are provided on the partition wall between the machine room 4 and the indoor air supply area, and the indoor air supply module 6 is used to transport the air discharged from the primary air outlet to the machine room 4 through the indoor air supply area, and transport the air discharged from the machine room 4 to the primary air inlet, forming an internal circulation; a number of outdoor air supply modules 7 are provided on the partition wall between the outdoor platform area 5 and the outdoor air supply area, and the outdoor air supply module 7 is used to transport the fresh air from the outdoor platform area 5 to the secondary air inlet through the outdoor air supply area, and transport the air discharged from the secondary air outlet to the outside of the fresh air duct 1, forming an external circulation, thereby realizing the heat dissipation function of the machine room 4.

[0022] Several air-conditioning units and several direct evaporative coolers are installed in the fresh air duct 1. Direct evaporative cooling technology is a cooling technology that uses water as a refrigerant. It utilizes direct contact between air and water and the latent heat of evaporation of water for cooling. It can quickly cool down and is environmentally friendly.

[0023] This utility model combines indirect evaporative cooling technology, direct evaporative cooling technology and fresh air technology by using evaporative cooling and natural cooling source technology, reduces the power consumption of air-conditioning units, thereby reducing the heat dissipation energy consumption of data centers, achieving maximum energy saving, and meeting the energy-saving requirements of large, medium and small data centers.

[0024] Specifically, the air conditioning unit includes a compressor 8, an evaporator 9, an expansion valve and a condenser 10. The compressor 8, evaporator 9, expansion valve and condenser 10 are connected by pipelines to form a closed loop. The evaporator 9 is movably set at the primary air outlet position, and the condenser 10 is movably set at the secondary air outlet position. The evaporator 9 is rotatably set on the side wall of the primary air outlet. The evaporator 9 is connected to a first driving mechanism. The first driving mechanism is used to drive the evaporator 9 to rotate into the primary air outlet to cool the primary air, or to drive the evaporator 9 to rotate away from the primary air outlet to reduce the wind resistance of the primary air. If the direction of the evaporator 9 is set to be consistent with the air outlet direction of the primary air outlet to form an open door structure, the wind resistance of the primary air can be reduced. If the direction of the evaporator 9 is set to be perpendicular to the air outlet direction of the primary air outlet to form a closed door structure, the evaporator 9 can be used to cool the primary air.

[0025] The condenser 10 is rotatably mounted on the side wall of the secondary air outlet. The condenser 10 is connected to a second drive mechanism, which is used to drive the condenser 10 to rotate into the secondary air outlet to dissipate heat from the condenser 10 using the secondary air, or to drive the condenser 10 to rotate away from the secondary air outlet to reduce the wind resistance of the secondary air. If the direction of the condenser 10 is set to be consistent with the air outlet direction of the secondary air outlet, forming an open door structure, the wind resistance of the secondary air can be reduced. If the direction of the evaporator 9 is set to be perpendicular to the air outlet direction of the secondary air outlet, forming a closed door structure, the secondary air can be used to dissipate heat from the condenser 10. The utility model designs the adjustable evaporator 9 and the condenser 10 into a movable switch-type structure, which can be rotated 90 degrees parallel to the air flow direction when not in use, thereby reducing wind resistance.

[0026] The machine room 4 is provided with a transverse partition 11, and the upper and lower sides of the transverse partition 11 are respectively provided with an upper space and a lower space that are interconnected. One end of the transverse partition 11 is provided with a connecting plate extending into the indoor air supply area and connected to the longitudinal partition, and the connecting plate is provided with a return air valve for connecting the upper space and the lower space in the indoor air supply area; the upper space is connected to the upper space of the indoor air supply area, and the primary air inlet is set in the upper space of the indoor air supply area and is equipped with an upper air valve 12; an indoor air supply module 6 is set between the lower space and the lower space of the indoor air supply area, and the primary air outlet is set in the lower space of the indoor air supply area and is equipped with a lower air valve 13. A ventilation shaft 14 and an exhaust pipe 15 are provided in the outdoor platform area 5, the secondary air inlet is provided with an electric sealing air valve 16, and the secondary air outlet is connected to the ventilation shaft 14 through the exhaust pipe 15, and the exhaust pipe (15) is equipped with a check valve 17. Outdoor air enters the secondary air inlet through the electric sealed air valve 16, exchanges heat with the hot air in the machine room 4, and is discharged to the exhaust pipe 15 through the secondary air outlet and discharged through the ventilation shaft 14.

[0027] The fresh air valve module 19 includes a fresh air inlet valve and a fresh air exhaust valve, both of which are mounted on the longitudinal partition. The fresh air inlet valve is used to transport fresh air from the outdoor air supply area to the indoor air supply area, and the fresh air exhaust valve is used to transport air from the indoor air supply area to the outdoor air supply area, thereby implementing the fresh air input function of the computer room 4. When the fresh air inlet valve on the bottom layer is activated alone (the fresh air exhaust valve is closed), it is used to implement a small fresh air function for the computer room 4, thereby maintaining a slight positive pressure within the computer room 4.

[0028] In a specific embodiment, the direct evaporative cooler is a wet film humidifier 18 , which is arranged in the indoor air supply area. The air output from the primary air outlet is further cooled by the wet film humidifier 18 and then transported to the machine room 4 .

[0029] In a specific embodiment, the indoor air supply module 6 includes an indoor air supply fan, which is arranged on the partition wall between the machine room 4 and the indoor air supply area; the outdoor air supply module 7 includes an outdoor air supply fan, which is arranged on the partition wall between the outdoor platform area 5 and the outdoor air supply area. There is an indoor side wind wall (a combination of a partition wall and an indoor air supply fan) between the machine room 4 and the indoor air supply area. There are eight indoor side wind walls, each 2.5 meters wide and 3.2 meters high. The wind speed of the indoor air supply fan is 3.3 m / s, and the air volume of a single indoor air supply fan is 96000 m 3 / h, the inside and outside temperatures are 25 degrees and 38 degrees respectively, with a temperature difference of 13 degrees. There is an outdoor side wind wall (a combination of a partition wall and an outdoor blower) between the outdoor platform area 5 and the outdoor air supply area. There are sixteen outdoor side wind walls, each 1.25 meters wide and 3.2 meters high. The wind speed of the outdoor blower is 3.3m / s, and the air volume of a single outdoor blower is 48000m 3 / h.

[0030] The spray device 3 includes a water collecting tray, a water pump and a nozzle. The water collecting tray is arranged below the indirect evaporation heat exchange core 2. The water pump is arranged in the water collecting tray. The water pump is used to transport water in the water collecting tray to the nozzle, so that the nozzle generates water mist and sprays it onto the indirect evaporation heat exchange core 2.

[0031] In this embodiment, there are eight indirect evaporation heat exchange cores 2, each with a heat exchange capacity of 380kw and a headwind speed of 3.8m / s. Fresh air inlet valve: 3m*3m (3 pcs), 1.8m*3m (2 pcs, 1 of which also serves as a small fresh air mode to maintain a slightly positive pressure (5-10Pa) in the machine room 4), with a headwind speed of 5m / s. Fresh air exhaust valve: 3m*1.8m (3 pcs), 1.8m*1.8m (2 pcs), with a headwind speed of 8m / s. Ventilation shafts 14, a total of 8 shared air shafts for 3 floors of equipment, 2.9m*3.3m, with a headwind speed of 8.4m / s.

[0032] When arranging indoor side wind walls, aim to face the cabinet cold aisle as much as possible. When arranging outdoor side wind walls, avoid exhaust shafts as much as possible to ensure smooth fresh air introduction. The air volume must be determined based on the heat transfer efficiency of the indirect evaporative heat exchange core 2 before further determination. In the civil engineering air duct area, the walls, ceiling, and floor must be airtight and insulated. Individual walls must meet fire protection requirements, and the passageways must consider equipment handling requirements. Drainage treatment should be provided for the water collection tray. Gas extinguishing should be considered in the upper area of ​​the indoor side wind wall mezzanine and in computer room 4. Compressor 8's cooling capacity should be supplemented by local climatic conditions, the most unfavorable wet-bulb temperature, and the heat transfer efficiency of the indirect evaporative heat exchange core 2 to ensure the supply air temperature is further determined. Indoor side wind walls and weak current group control equipment require one controller per mains supply, while other equipment requires a dual-mains supply configuration. Various sensors should be installed inside and outside the air duct to manage each system device, switch between modes, and monitor system operation.

[0033] This embodiment also provides a working method of a data center air conditioning system, the working method including a dry working mode, a wet working mode, a compressor mode, a fresh air mode, a mixed air mode and an air extinguishing mode.

[0034] When the outdoor dry-bulb temperature is ≤18°C, the data center air conditioning system enters the dry working mode. At this time: the fresh air inlet valve and the fresh air exhaust valve are both closed, the evaporator 9 rotates to the outside of the primary air outlet to reduce the wind resistance of the primary air, the condenser 10 rotates to the outside of the secondary air outlet to reduce the wind resistance of the secondary air, the upper air valve 12, the lower air valve 13 and the electric sealing air valve 16 are all open, and the spray device 3, the wet film humidifier 18 and the compressor 8 are all closed;

[0035] When the outdoor dry-bulb temperature is greater than 18°C ​​and the outdoor wet-bulb temperature is less than or equal to 20°C, the data center air conditioning system enters the wet working mode. At this time, the fresh air inlet valve and the fresh air exhaust valve are both closed, the evaporator 9 rotates to the outside of the primary air outlet to reduce the wind resistance of the primary air, the condenser 10 rotates to the outside of the secondary air outlet to reduce the wind resistance of the secondary air, the upper air valve 12, the lower air valve 13 and the electric sealing air valve 16 are all open, the spray device 3 is on, the wet film humidifier 18 is closed or on, and the compressor 8 is off.

[0036] When the outdoor wet-bulb temperature is greater than 20°C, the data center air conditioning system enters the compressor mode. At this time, the fresh air inlet valve and the fresh air exhaust valve are both closed, the evaporator 9 rotates to the inside of the primary air outlet to cool the primary air, the condenser 10 rotates to the inside of the secondary air outlet to use the secondary air to dissipate heat from the condenser 10, the upper air valve 12, the lower air valve 13 and the electric sealing air valve 16 are all open, the spray device 3 is on, the wet film humidifier 18 is closed or on, and the compressor 8 is on.

[0037] When the air quality PM2.5 is lower than 75μg / m 3 , SO2 concentration is lower than 100μg / m 3 When the outdoor temperature is 25±3℃ and the outdoor dew point temperature is lower than 15.5℃, the data center air conditioning system enters the fresh air mode. At this time: the fresh air inlet valve and the fresh air exhaust valve are both open, the evaporator 9 rotates to the inside of the primary air outlet, the condenser 10 rotates to the inside of the secondary air outlet, the upper air valve 12, the lower air valve 13 and the electric sealing air valve 16 are all closed, and the spray device 3, the wet film humidifier 18 and the compressor 8 are all turned off;

[0038] When the outdoor air quality PM2.5 is lower than 75μg / m 3 , SO2 concentration is lower than 100μg / m 3When the outdoor dry-bulb temperature is lower than 25°C and the outdoor dew point temperature is lower than 15.5°C, the data center air conditioning system enters the mixed air mode. At this time: the fresh air inlet valve and the fresh air exhaust valve are both in the open state. The fresh air volume is adjusted by controlling the opening ratio of the fresh air inlet valve and the fresh air exhaust valve. The return air valve is in the open state. The evaporator 9 rotates to the inside of the primary air outlet, and the condenser 10 rotates to the inside of the secondary air outlet. The upper air valve 12, the lower air valve 13 and the electric sealing air valve 16 are all in the closed state. The spray device 3, the wet film humidifier 18 and the compressor 8 are all in the off state.

[0039] When a fire occurs in the computer room 4, the data center air conditioning system enters the gas extinguishing mode. At this time: the fresh air inlet valve and the fresh air exhaust valve are both closed, the upper air valve 12 and the lower air valve 13 are both closed, the spray device 3 is closed, the wet film humidifier 18 is closed, and the compressor 8 is closed;

[0040] Among them, in the dry working mode, wet working mode and compressor mode, the fresh air inlet valve of the lowest layer is started separately to realize the small fresh air function to maintain a slight positive pressure in the machine room 4.

[0041] The details of each working mode are as follows:

[0042]

[0043]

[0044] For dry working mode, the wind resistance is calculated as follows:

[0045]

[0046]

[0047] For the fresh air mode, the wind resistance is calculated as follows:

[0048]

[0049] The indirect evaporation heat exchange core (dry) means that the spray device 3 is not in working state, and the indirect evaporation heat exchange core (wet) means that the spray device 3 is in working state.

[0050] For dry working mode and fresh air mode, the fan power consumption is calculated as follows:

[0051]

[0052] This utility model makes full use of the space conditions of civil engineering and, based on the principle of evaporative cooling units, distributes its internal core components in the civil engineering space. This is no longer limited by the size of the unit itself, and the core heat exchange area can be further increased, thereby increasing the overall cooling capacity. The fan energy saving effect brought about by the reduction in wind speed is very significant, and the load-bearing capacity of the floor can be greatly reduced. Based on the core advantages of the traditional units, this utility model also designs the evaporator 9 and condenser 10 to be openable, which can be opened when not in use to reduce wind resistance; adds a fresh air mode, which can directly send outdoor fresh air into the computer room 4 for cooling when conditions are met; adds a direct evaporation mode to further reduce the supply air temperature; and because the core is not limited by size, a water collection tray can be further implanted to increase the heat recovery mode, thereby meeting the winter heating needs of the data center.

[0053] This new system is particularly suitable for use in northern China, allowing for flexible adjustments based on the project's system configuration and mode. For key data center locations, such as Huailai in Zhangjiakou, an indirect evaporation system with compressor 8 is used; Ulanqab uses fresh air with compressors; and Inner Mongolia and Xinjiang use fresh air with no compressors. Under the same cooling capacity, the energy consumption of the spray device 3 and compressor 8 is roughly equivalent, primarily relying on the fan for energy savings. This new system is theoretically estimated to achieve energy savings of over 40%, and over 70% in fresh air mode.

[0054] In the description of the present utility model, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, and can be fixedly connected, detachably connected, or integrated; can be mechanically connected or electrically connected; can be directly connected or indirectly connected through an intermediate medium, can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood. In addition, the specific features, structures, etc. described in the embodiment are included in at least one embodiment. Under the condition that there is no contradiction, those skilled in the art can combine the features of different embodiments. The scope of protection of the present utility model is not limited to the above-mentioned specific embodiments. According to the basic technical concept of the present utility model, the embodiments that can be associated with by ordinary technicians in this field without creative work all fall within the scope of protection of the present utility model.

Claims

1. A data center air conditioning system, comprising a fresh air duct (1), a machine room (4) and an outdoor platform area (5), characterized in that: A longitudinal partition is provided in the fresh air duct (1), a fresh air valve module (19) is provided on the longitudinal partition, an indoor air supply area is provided between one side of the longitudinal partition and the machine room (4), and an outdoor air supply area is provided between the other side of the longitudinal partition and the outdoor platform area (5), a plurality of indirect evaporation heat exchange cores (2) are provided on the longitudinal partition, the indirect evaporation heat exchange cores (2) are equipped with a spray device (3), a primary air channel and a secondary air channel capable of heat exchange are provided inside the indirect evaporation heat exchange core (2), a primary air inlet and a primary air outlet are provided at both ends of the primary air channel, both of which are connected to the indoor air supply area, a secondary air inlet and a secondary air outlet are provided at both ends of the secondary air channel, The outlets are all connected to the outdoor air supply area; a plurality of indoor air supply modules (6) are provided on the partition wall between the machine room (4) and the indoor air supply area, and the indoor air supply modules (6) are used to transport the air discharged from the primary air outlet to the machine room (4) through the indoor air supply area, and transport the air discharged from the machine room (4) to the primary air inlet, forming an internal circulation; a plurality of outdoor air supply modules (7) are provided on the partition wall between the outdoor platform area (5) and the outdoor air supply area, and the outdoor air supply modules (7) are used to transport the fresh air from the outdoor platform area (5) to the secondary air inlet through the outdoor air supply area, and transport the air discharged from the secondary air outlet to the outside of the fresh air duct (1), forming an external circulation; a plurality of air conditioning units and a plurality of direct evaporative coolers are provided in the fresh air duct (1).

2. The data center air conditioning system according to claim 1, characterized in that: The air conditioning unit comprises a compressor (8), an evaporator (9), an expansion valve and a condenser (10); the compressor (8), evaporator (9), expansion valve and condenser (10) are connected via pipelines to form a closed loop; the evaporator (9) is movably arranged at a primary air outlet position, and the condenser (10) is movably arranged at a secondary air outlet position.

3. The data center air conditioning system according to claim 2, characterized in that: The evaporator (9) is rotatably arranged on the side wall of the primary air outlet, and the evaporator (9) is connected to a first driving mechanism, and the first driving mechanism is used to drive the evaporator (9) to rotate and enter the primary air outlet to cool the primary air, or to drive the evaporator (9) to rotate and leave the primary air outlet to reduce the wind resistance of the primary air; the condenser (10) is rotatably arranged on the side wall of the secondary air outlet, and the condenser (10) is connected to a second driving mechanism, and the second driving mechanism is used to drive the condenser (10) to rotate and enter the secondary air outlet to use the secondary air to dissipate heat for the condenser (10), or to drive the condenser (10) to rotate and leave the secondary air outlet to reduce the wind resistance of the secondary air.

4. The data center air conditioning system according to claim 1, characterized in that: The machine room (4) is provided with a transverse partition (11), and upper and lower sides of the transverse partition (11) are respectively provided with an upper space and a lower space that are interconnected. One end of the transverse partition (11) is provided with a connecting plate that extends into the indoor air supply area and is connected to the longitudinal partition, and the connecting plate is provided with a return air valve for connecting the upper space and the lower space in the indoor air supply area; the upper space is connected to the upper space of the indoor air supply area, and the primary air inlet is arranged in the upper space of the indoor air supply area and is equipped with an upper air valve (12); an indoor air supply module (6) is arranged between the lower space and the lower space of the indoor air supply area, and the primary air outlet is arranged in the lower space of the indoor air supply area and is equipped with a lower air valve (13).

5. The data center air conditioning system according to claim 1, wherein: The outdoor platform area (5) is provided with a ventilation shaft (14) and an exhaust pipe (15); the secondary air inlet is provided with an electric sealing air valve (16); the secondary air outlet is communicated with the ventilation shaft (14) through the exhaust pipe (15); and the exhaust pipe (15) is equipped with a check valve (17).

6. The data center air conditioning system according to claim 1, characterized in that: The fresh air valve module (19) includes a fresh air inlet valve and a fresh air exhaust valve, both of which are arranged on a longitudinal partition. The fresh air inlet valve is used to transport fresh air from an outdoor air supply area to an indoor air supply area, and the fresh air exhaust valve is used to transport air from an indoor air supply area to an outdoor air supply area. The fresh air inlet valve at the bottom layer is used to realize a small fresh air function of the machine room (4) when it is started alone.

7. The data center air conditioning system according to claim 1, characterized in that: The direct evaporative cooler is a wet film humidifier (18), and the wet film humidifier (18) is arranged in an indoor air supply area.

8. The data center air conditioning system according to claim 1, wherein: The indoor air supply module (6) includes an indoor air supply fan, and the indoor air supply fan is arranged on the partition wall between the machine room (4) and the indoor air supply area.

9. The data center air conditioning system according to claim 1, characterized in that: The outdoor air supply module (7) comprises an outdoor air supply fan, and the outdoor air supply fan is arranged on the partition wall between the outdoor platform area (5) and the outdoor air supply area.

10. The data center air conditioning system according to claim 1, wherein: The spraying device (3) comprises a water collecting tray, a water pump and a nozzle. The water collecting tray is arranged below the indirect evaporative heat exchange core (2). The water pump is arranged in the water collecting tray. The water pump is used to transport water in the water collecting tray to the nozzle, so that the nozzle generates water mist and sprays it onto the indirect evaporative heat exchange core (2).

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