JP2018036046A - Air conditioning system, building and data center - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain an efficient humidification environment for stabilizing temperature and humidity in a room within a predetermined range.SOLUTION: An air conditioning system is configured to adjust a temperature of a storage chamber where a heating article is stored in a building. The air conditioning system includes a temperature adjustment device configured to circulate refrigerant to adjust a temperature of the storage chamber, and a humidification device configured to humidify warm air discharged from the storage chamber and feed the humidified air to the storage chamber. The humidification device includes a first humidification unit, and a second humidification unit that operates in a case where the first humidification unit is in an abnormal state.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an air conditioning system, a building, and a data center.

  2. Description of the Related Art Conventionally, in a building such as a data center where a large number of server devices are installed, an air conditioning system is provided to keep the temperature in the server room in which the server device is installed in order to operate the server device stably. (For example, refer to Patent Document 1). In such an air conditioning system, air in the server room is circulated in the building, the temperature of the air is adjusted, and the air is supplied to the server room.

JP 2010-190494 A

  By the way, it is necessary not only to always keep the server device under a substantially constant temperature, but also to keep the humidity substantially constant. Although it is conceivable to install a general humidifier in the server room, it is desired to install a humidifier that enables more efficient operation.

  The subject of this invention is implement | achieving the efficient humidification environment for stabilizing indoor temperature and humidity within a predetermined range, respectively.

  The air conditioning system according to the present application adjusts the temperature of a storage room in which a heat-generating article in a building is stored. The air conditioning system according to the present application humidifies the temperature adjustment device that adjusts the room temperature of the storage room by circulating the refrigerant and the warm air discharged from the storage room, and sends the humidified air to the storage room A humidifier. The humidifying device includes a first humidifying unit and a second humidifying unit that operates when the first humidifying unit is not normal.

  ADVANTAGE OF THE INVENTION According to this invention, the efficient humidification environment for stabilizing indoor temperature and humidity within a predetermined range, respectively is realizable.

It is explanatory drawing which shows schematic structure of the data center which concerns on this embodiment. It is a block diagram which shows the main control structure of the air conditioning system which concerns on this embodiment. It is explanatory drawing which shows schematic structure of the 2nd humidification part which concerns on this embodiment. It is a top view which shows the example of arrangement | positioning in the 2nd floor part of the 2nd humidification part which concerns on this embodiment. It is a schematic diagram which shows the planar layout of the 1st humidification part which concerns on this embodiment. It is a mimetic diagram showing a schematic structure of a ventilator concerning this embodiment. It is a flowchart which shows the flow of the temperature adjustment process which concerns on this embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. The following is one embodiment of the present invention and does not limit the present invention. Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[1. Explanation of data center configuration]
First, the configuration of the data center 100 as a building according to the present embodiment will be described. FIG. 1 is an explanatory diagram showing a schematic configuration of the data center 100. FIG. 2 is a block diagram showing a main control configuration of the air conditioning system 1 provided in the data center 100. As shown in FIG. 1, the data center 100 is, for example, a building on the first basement floor and the third floor above the ground. The underground first floor portion 101 is provided with a cold water tank 102 for storing water as a refrigerant and a humidifying water tank 103 for storing water for humidification. The first floor portion 111 is provided with a refrigerator 21 of the cooling device 2 described later.

  The second floor portion 112 is provided with a server room 3 in which a plurality of server devices 31 are housed, and a ventilator 4 for taking outside air into the server room 3. The ventilation device 4 is disposed in the vicinity of the outer wall of the second floor portion 112. The third floor portion 113 is in communication with the server room 3 and serves as an exhaust heat area for exhausting heat generated from the server device 31 by taking in air from the server room 3. On the rooftop portion 114, the cooling tower 22 of the cooling device 2 is installed.

  Further, as shown in FIGS. 1 and 2, the air conditioning system 1 is provided with a humidifier 5 that humidifies the air discharged from the server room 3 and sends the humidified air to the server room 3. . The humidifying device 5 is provided with a first humidifying unit 6 and a second humidifying unit 7.

  The 1st humidification part 6 takes in the air discharged | emitted from the server room 3 from a heat exhaust area, and humidifies it by sending the said air to the water tank 103 for humidification. Specifically, the first humidification unit 6 includes a first pipe 61 arranged from the exhaust heat area to the humidification water tank 103, and a pump that sends the air in the exhaust heat area to the humidification water tank 103 via the first pipe 61. 62, a second pipe 63 arranged from the humidifying water tank 103 to the server room 3, and a damper 64 for sending the air in the humidifying water tank 103 to the server room 3 through the second pipe 63 are provided.

  The end of the first pipe 61 on the humidifying water tank 103 side is disposed in the water of the humidifying water tank 103. On the other hand, the end of the second pipe 63 on the humidifying water tank 103 side is disposed above the water surface of the humidifying water tank 103. The air that has passed through the first pipe 61 is humidified by passing through the water in the humidifying water tank 103, floats on the water, and is sent to the server room 3 by passing through the second pipe 63.

  FIG. 3 is an explanatory diagram showing a schematic configuration of the second humidifying unit 7. As shown in FIG. 3, a first chamber 71 and a second chamber 72 adjacent to the first chamber are provided inside the second humidifying unit 7.

  The first chamber 71 has a space along the vertical direction, and a first damper 73 for adjusting the flow rate of air from the first chamber 71 to the outside is installed at the upper end portion thereof. A second damper 74 for adjusting the flow rate of air from the exhaust heat area to the first chamber 71 is installed on the upper side surface of the first chamber 71. An opening 75 is provided in the lower part of the first chamber 71, and thereby the first chamber 71 and the second chamber 72 communicate with each other.

  The second chamber 72 has a space along the vertical direction, and a fan portion 76 for sending air to the server chamber 3 is provided on the upper side surface thereof. In addition, a water supply unit 77 that sprays water and supplies the water into the second chamber 72 is provided at the ceiling in the second chamber 72. A flow path 78 of water sprayed from the water supply unit 77 is formed below the water supply unit 77.

  The channel 78 is formed by a plurality of plate materials 79 having hydrophilicity, for example. The plurality of plate members 79 are arranged in a bellows shape in the vertical direction. The upper end portion of each plate material 79 is in contact with the wall surface, and the lower end portion is disposed away from the upper end portion of the adjacent plate material 79. Thereby, the water droplet supplied from the water supply part 77 flows down along the surface of all the board | plate materials 79, falling sequentially from the uppermost board | plate material 79 to the lower board | plate material 79 (refer arrow Y1 in FIG. 3). ).

  When the fan unit 76 is driven, the air in the first chamber 71 moves to the second chamber 72 through the opening 75 and reaches the fan unit 76 while passing through the gaps formed by the plate members 79 (FIG. 3). Middle, see arrow Y2), and sent to server room 3. At this time, since the air is exposed to the water flowing through the flow path 78, the air is humidified.

  FIG. 4 is a plan view illustrating an arrangement example of the second humidifying unit 7 in the second floor portion 112. The first chamber 71 and the second chamber 72 are arranged at each corner of the second floor portion 112, and the first chamber 71 is arranged outside the second chamber 72.

  FIG. 5 is a schematic diagram showing a planar layout of the first humidifying unit 6. In addition, in this FIG. 5, it is the figure which looked at the whole layout of the 2nd humidification part 7 from upper direction, and has shown including the structure of all the hierarchy. One end of the first pipe 61 of the first humidifying unit 6 is provided in the first chamber 71, and the other end is provided in the humidifying water tank 103, and communicates with the exhaust heat area via the first chamber 71. ing. A pump 62 is provided in the middle of the first pipe 61. The second pipe 63 of the first humidification unit 6 extends from the humidification water tank 103 and is arranged in the server room 3. A plurality of dampers 64 are provided at predetermined intervals in a portion of the second pipe 63 disposed in the server room 3.

  The water supply unit 77 of the second humidification unit 7 has a pipe 771 having one end provided in the second chamber 72 and the other end provided in the humidification water tank 103, and a pump provided in the middle of the pipe 771. 772 is provided. That is, the water supplied from the water supply part 77 to the second chamber 72 is supplied from the humidifying water tank 103.

  The air conditioning system 1 is also provided with a temperature adjustment device 8 that adjusts the room temperature of the server room 3 by circulating the water stored in the cold water tank 102. The temperature adjustment device 8 includes a cooling coil 81 arranged in the server room 3, a third pipe 82 arranged from the cold water tank 102 to the cooling coil 81, and a fourth pipe arranged from the cooling coil 81 to the cold water tank 102. A pump 84 that sucks water in the cold water tank 102 so that the water in the pipe 83 and the cold water tank 102 passes through the third pipe 82, the cooling coil 81, and the fourth pipe 83 in this order and circulates to the cold water tank 102. And are provided. When the water in the cold water tank 102 reaches the cooling coil 81, the air around the cooling coil 81 is cooled. By using this cooled air, the room temperature of the server room 3 can be kept constant.

  The water intake port of the third pipe 82 and the drain port of the fourth pipe 83 are arranged at positions separated by the cold water tank 102. Even if the water warmed after the circulation is drained from the fourth pipe 83, the water is not immediately absorbed by the third pipe 82, so that the water that is less affected by the drainage is sent to the cooling coil 81.

  The cooling device 2 provided in the air conditioning system 1 cools the water in the cold water tank 102 by a refrigeration cycle, and includes a refrigerator 21 and a cooling tower 22. The refrigerator 21 is provided with a fifth pipe 23 for absorbing the water in the cold water tank 102 and a sixth pipe 24 for draining the cold water tank 102. The water inlet of the fifth pipe 23 is disposed near the drain outlet of the fourth pipe 83. The drain port of the sixth pipe 24 is disposed near the water inlet of the third pipe 82. The cooling device 2 cools the water taken in from the fifth pipe 23 to a predetermined temperature and drains it from the sixth pipe 24 to the cold water tank 102.

  The refrigerator 21 is provided with a seventh pipe 25 and an eighth pipe 26 arranged up to the cooling tower 22, and the inside of the refrigerator 21 is cooled via the seventh pipe 25 and the eighth pipe 26. By circulating water to the cooling tower 22, the temporarily heated cooling water can be cooled by the cooling tower 22 and circulated to the refrigerator 21.

  As shown in FIGS. 1 and 4, the ventilation device 4 provided in the air conditioning system 1 is disposed in the vicinity of the outer wall of the second floor portion 112. FIG. 6 is a schematic diagram illustrating a schematic configuration of the ventilation device 4. As shown in FIG. 6, the ventilator 4 includes a shutter part 41 for opening and closing a flow path of outside air, a fan part 42 for blowing outside air into the server room 3 so as to pass through the flow path, and a flow path. And a fine mesh net 43 that is disposed so as to cover and have air permeability.

  Specifically, the shutter portion 41 is attached to an opening provided on the outer wall of the second floor portion 112, and the opening and closing of the opening opens and closes the flow path of the outside air. The shutter unit 41 completely shields the passage of outside air when closed, and includes, for example, a heavy shutter.

  The fan unit 42 includes a plurality of fans 421, which are arranged on the inner side than the shutter unit 41. When the plurality of fans 421 are driven, an air flow that sends outside air into the room is generated.

  The fine mesh net 43 is disposed between the shutter part 41 and the fan part 42. Each pore diameter of the fine mesh net 43 is preferably 0.2 to 0.6 mm, and more preferably 0.25 to 0.5 mm. As the outside air passes through the fine mesh net 43, the flow of air after passing is made uniform in the surface direction. Furthermore, invasion of insects and dust can be prevented.

  As shown in FIG. 2, the air conditioning system 1 is provided with a control device 9 that controls each drive unit provided in the air conditioning system 1. Specifically, the control device 9 includes a pump 62 and a damper 64 of the first humidifying unit 6, a first damper 73, a second damper 74, a fan unit 76 and a water supply unit 77 of the second humidifying unit 7, and a ventilation device. 4 is electrically connected to the shutter unit 41 and the fan unit 42, the pump 84 of the temperature adjusting device 8, the refrigerator 21 and the cooling tower 22 of the cooling device 2, and these are comprehensively controlled. It has become.

  The control device 9 classifies the day into a first time zone (daytime) and a second time zone (nighttime) in which the outside air temperature is lower than the first time zone, and ventilation is performed in the first time zone. The temperature adjustment device 8 is driven in a state where the device 4 and the cooling device 2 are stopped to adjust the room temperature of the server room 3. On the other hand, in the second time zone, the control device 9 drives the ventilator 4 with the temperature adjusting device 8 stopped to take outside air into the server room 3 and drives the cooling device 2 to drive the cold water tank 102. It is designed to cool the water inside.

  As described above, the first time zone and the second time zone may be simply separated by time, or the time zone in which the outside air temperature is higher than the predetermined temperature is set as the first time zone. The time zone in which the outside air temperature is equal to or lower than the predetermined temperature may be set as the second time zone. The predetermined temperature is an upper limit value of temperature for operating the server device 31 stably.

[2. Explanation of operation]
Next, a specific example of the temperature adjustment process of the data center 100 by the control device 9 will be described. FIG. 7 is a flowchart showing the flow of temperature adjustment processing.

  As shown in FIG. 7, when the temperature adjustment process is started, the control device 9 determines whether or not the first humidifying unit 6 is normal (step S1). The process proceeds to step S2, and if it is determined that it is not normal, the process proceeds to step S3.

  In step S <b> 2, the control device 9 drives the first humidifying unit 6. Specifically, the control device 9 drives the pump 62 to send the air in the exhaust heat area to the humidifying water tank 103 via the first chamber 71 and opens the damper 64 to supply the air in the humidifying water tank 103 to the server. Send to room 3. The air thus sent is humidified by passing through the water in the humidifying water tank 103 and is sent to the server room 3.

  In addition, the control apparatus 9 controls the 1st damper 73 and the 2nd damper 74 of the 2nd humidification part 7 at this time, via the 2nd damper 74, the 1st chamber 71, and the 1st piping 61 from an exhaust heat area. The amount of air sent to the humidifying water tank 103 and the amount of air discharged from the exhaust heat area through the second damper 74, the first chamber 71 and the first damper 73 to the outside are optimized. Yes.

  In step S <b> 3, the control device 9 drives the second humidifying unit 7. Specifically, the control device 9 drives the water supply unit 77 and the fan unit 76 after the first damper 73 is opened and the second damper 74 is opened. Even at this time, the control device 9 controls the first damper 73 and the second damper 74 of the second humidifying unit 7 to control the air sent from the exhaust heat area to the first chamber 71 via the second damper 74. The amount and the amount of air discharged from the exhaust heat area through the second damper 74, the first chamber 71, and the first damper 73 to the outside are optimized.

  When the water supply unit 77 is driven, water is supplied to the uppermost plate material 79 and sequentially flows down along the surfaces of all the plate materials 79 while dropping to the lower plate material 79. Further, when the fan unit 76 is driven, the air supplied from the exhaust heat area to the first chamber 71 via the second damper 74 moves to the second chamber 72 via the opening 75, and each plate material 79 forms. The fan unit 76 is reached while passing through the gap and is sent to the server room 3. At this time, since the air is exposed to the water flowing through the flow path 78, the air is humidified.

  Next, the control device 9 determines whether the current time zone is the first time zone or the second time zone (step S4), and if it is the first time zone, the process proceeds to step S5. If it is the second time zone, the process proceeds to step S8.

  In step S5, the control device 9 stops the ventilation device 4. Specifically, the control device 9 closes the shutter unit 41 and stops the fan unit 42. As a result, outside air does not enter the server room 3.

  In step S6, the control device 9 stops the cooling device 2. Specifically, the control device 9 places the refrigerator 21 and the cooling tower 22 in a standby state. Thereby, the power consumption of the refrigerator 21 and the cooling tower 22 falls significantly.

  In step S <b> 7, the control device 9 adjusts the room temperature of the server room 3 by driving the temperature adjustment device 8. Specifically, the control device 9 drives the pump 84 to pass the water in the cold water tank 102 in the order of the third pipe 82, the cooling coil 81, and the fourth pipe 83, and circulates the water to the cold water tank 102. When the water in the cold water tank 102 reaches the cooling coil 81, the air around the cooling coil 81 is cooled. By using this cooled air, the room temperature of the server room 3 can be kept constant.

  In step S8, the control device 9 stops the temperature adjusting device 8. Specifically, the control device 9 stops the pump 84 and stops the circulation of water in the cold water tank 102.

  In step S9, the control device 9 drives the cooling device 2. Specifically, the control device 9 cools the water in the cold water tank 102 by driving the refrigerator 21 and the cooling tower 22. In the night time zone, which is the second time zone, the electricity rate is set lower than in the daytime, so that the water in the cold water tank 102 can be cooled using cheap power.

  In step S <b> 10, the control device 9 adjusts the room temperature of the server room 3 by driving the ventilation device 4. Specifically, the control device 9 opens the shutter unit 41 and drives the fan unit 42. As a result, outside air enters the server room 3 and the room temperature becomes a predetermined temperature or lower.

  After step S7 and step S10, the process proceeds to step S4, so that the first time zone process (steps S5, S6, S7) and the second time zone process (steps S8, S9, S10). ) Is repeated and repeated.

[3. effect]
As described above, according to the present embodiment, the temperature adjustment device 8 is driven to adjust the room temperature of the server room 3 while the ventilation device 4 and the cooling device 2 are stopped in the first time zone. The room temperature of the server room 3 can be adjusted using water (refrigerant) stored in the cold water tank 102 only by operating the temperature adjustment device 8 whose electric power is smaller than that of the cooling device 2.

  On the other hand, in the second time zone, the room temperature of the server room 3 is reduced to a predetermined temperature or less by driving the ventilator 4 with the temperature adjusting device 8 stopped and taking outside air into the server room 3. Can do. In the second time zone, the cooling device 2 is driven to cool the water in the cold water tank 102. Since the second time zone is a night zone where the electricity rate is set lower than in the daytime, the water in the cold water tank 102 can be cooled using cheap electric power.

  From these facts, it is possible to perform stable temperature adjustment throughout the entire day while suppressing power consumption during a time period (first time period) in which the peak of power consumption is reached during the day. Therefore, it is possible to make a social contribution in terms of power consumption.

  Further, since the ventilator 4 is provided with the shutter part 41 for opening and closing the flow path of the outside air, a large amount of outside air can be taken in and closed only by opening and closing the shutter part 41. In addition, since the fine mesh net 43 having air permeability is arranged so as to block the flow path of the outside air, the outside air passes through the fine mesh net 43 so that the air flow after passing is made uniform in the surface direction. Can be made. Furthermore, invasion of insects and dust can be prevented.

  Further, since the humidifier 5 is humidifying the air discharged from the server room 3, the humidified air can be humidified with respect to the air heated in the server room 3 and having a large saturated water vapor amount. Can be included in the air. Since the humidified air is sent again into the server room 3, the humidity can be stabilized while circulating the air in the server room 3. Thus, by providing the temperature adjusting device 8 and the humidifying device 5, it is possible to realize an efficient humidifying environment for stabilizing the temperature and humidity in the server room 3 within a predetermined range. .

  Moreover, since the humidifier 5 is equipped with the 1st humidification part 6 humidified by sending the air discharged | emitted from the server room 3 in the stored water, it is easy only by sending air into water. Can be humidified.

  Moreover, since the humidification apparatus 5 is provided with the 2nd humidification part 7 humidified by sending the air discharged | emitted from the server room 3 along the flowing water, it only sends air along the flowing water Can be easily humidified.

  Furthermore, since two humidification systems are provided, even if one of them has a problem, if the other is used, a humidified state can be maintained, and operation over a long period of time becomes possible.

[4. Others]
Note that the present invention is not limited to the above embodiment, and can be modified as appropriate.
For example, in the above-described embodiment, the data center 100 including the server room 3 has been described as an example of a building. However, the above-described configuration is applied even to a building including a storage room in which articles requiring temperature management are stored. It is also possible.

  Moreover, in the 2nd humidification part 7 of the said embodiment, although the case where it humidifies by sending the air discharged | emitted from the server room 3 so that it may flow backwards to the flowing water was demonstrated, it flows the said air It is also possible to humidify by sending the water so that it flows forward. In any case, it can be easily humidified just by sending air along the flowing water.

1 Air conditioning system 2 Cooling device 3 Server room (storage room)
4 Ventilator 5 Humidifier 6 First humidifier 7 Second humidifier 8 Temperature controller 9 Controller 21 Refrigerator 22 Cooling tower 31 Server device 41 Shutter unit 42 Fan unit 43 Fine mesh net 100 Data center (building)
102 Cold water tank 103 Humidification water tank

Claims (9)

In an air conditioning system that adjusts the temperature of a storage room in which heat generating articles in a building are stored,
A temperature adjusting device for adjusting the room temperature of the storage chamber by circulating a refrigerant;
A humidifier for humidifying the warmed air discharged from the storage chamber and sending the humidified air to the storage chamber;
The said humidifier is provided with a 1st humidification part and a 2nd humidification part which operate | moves when said 1st humidification part is not normal, The air conditioning system characterized by the above-mentioned. In an air conditioning system that adjusts the temperature of a storage room in which articles in a building are stored,
A temperature adjusting device for adjusting the room temperature of the storage chamber by circulating a refrigerant;
A humidifier for humidifying the air discharged from the storage chamber and sending the humidified air to the storage chamber;
A cooling device for cooling the refrigerant;
A ventilator for taking outside air into the storage room;
A control device for controlling the temperature adjusting device, the cooling device and the ventilation device,
The humidifier includes a first humidifier and a second humidifier that operates when the first humidifier is not normal.
The control device classifies a day into a first time zone and a second time zone in which the outside air temperature is lower than the first time zone, and in the first time zone of the day, The temperature adjusting device was driven in a state where the ventilation device and the cooling device were stopped to adjust the room temperature of the storage chamber, and the temperature adjusting device was stopped in the second time zone of the day. An air conditioning system, wherein the ventilation device is driven in a state to take outside air into the storage chamber, and the cooling device is driven to cool the refrigerant. The air conditioning system according to claim 1,
A cooling device for cooling the refrigerant;
A ventilator for taking outside air into the storage room;
A control device for controlling the temperature adjusting device, the cooling device and the ventilation device;
With
The control device classifies a day into a first time zone and a second time zone in which the outside air temperature is lower than the first time zone. In the first time zone, the ventilation device and the The temperature adjustment device is driven in a state where the cooling device is stopped to adjust the room temperature of the storage chamber, and the ventilation device is driven in the state where the temperature adjustment device is stopped during the second time period to store the storage. An air conditioning system characterized in that outside air is taken into the chamber and the cooling device is driven to cool the refrigerant. In the air conditioning system according to any one of claims 1 to 3,
The air conditioning system, wherein the first humidifying unit humidifies the air discharged from the storage chamber by sending it into the stored water. In the air conditioning system according to any one of claims 1 to 3,
Said 2nd humidification part humidifies by sending the air discharged | emitted from the said storage chamber along flowing water, The air conditioning system characterized by the above-mentioned. A storage room for storing items that generate heat;
A temperature adjusting device for adjusting the room temperature of the storage chamber by circulating a refrigerant;
A humidifier for humidifying the warmed air discharged from the storage chamber and sending the humidified air to the storage chamber;
The said humidifier is provided with the 1st humidification part and the 2nd humidification part which operate | moves when the said 1st humidification part is not normal, The building characterized by the above-mentioned. A storage room in which articles are stored;
A temperature adjusting device for adjusting the room temperature of the storage chamber by circulating a refrigerant;
A humidifier for humidifying the air discharged from the storage chamber and sending the humidified air to the storage chamber;
A cooling device for cooling the refrigerant;
A ventilator for taking outside air into the storage room;
A control device for controlling the temperature adjusting device, the cooling device and the ventilation device,
The humidifier includes a first humidifier and a second humidifier that operates when the first humidifier is not normal.
The control device classifies a day into a first time zone and a second time zone in which the outside air temperature is lower than the first time zone, and in the first time zone of the day, The temperature adjusting device was driven in a state where the ventilation device and the cooling device were stopped to adjust the room temperature of the storage chamber, and the temperature adjusting device was stopped in the second time zone of the day. The building is characterized in that the ventilation device is driven in a state to take outside air into the storage chamber, and the cooling device is driven to cool the refrigerant. A server room in which the server device is stored;
A temperature adjusting device for adjusting the room temperature of the server room by circulating a refrigerant;
A humidifier for humidifying the warmed air discharged from the server room, and sending the humidified air to the server room;
The data center comprising: a first humidification unit; and a second humidification unit that operates when the first humidification unit is not normal. A server room in which the server device is stored;
A temperature adjusting device for adjusting the room temperature of the server room by circulating a refrigerant;
A humidifier for humidifying the air discharged from the server room, and sending the humidified air to the server room;
A cooling device for cooling the refrigerant;
A ventilator for taking outside air into the server room;
A control device for controlling the temperature adjusting device, the cooling device and the ventilation device,
The humidifier includes a first humidifier and a second humidifier that operates when the first humidifier is not normal.
The control device classifies a day into a first time zone and a second time zone in which the outside air temperature is lower than the first time zone, and in the first time zone of the day, The temperature adjusting device was driven to adjust the room temperature of the server room while the ventilation device and the cooling device were stopped, and the temperature adjusting device was stopped in the second time zone of the day. A data center characterized by driving the ventilation device in a state to take outside air into the server room and driving the cooling device to cool the refrigerant.

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