Data center air conditioning system

Abstract

This makes it easier to prevent dust and moisture from entering data center buildings. [Solution] The air conditioning system of this data center comprises a building with an air vent formed at the bottom of the building, an information processing equipment room located between the exterior wall of the building and the air vent and in which racks housing information processing equipment are lined up, an outside air intake path located at the bottom of the building connecting the outside of the building with the air vent, and a blower fan that draws in air from outside the building via the outside air intake path and the air vent and supplies cool air to the information processing equipment room.

Description

[Technical Field]

[0001] The present invention relates to an air conditioning system for a data center. [Background technology]

[0002] In a data center, a large number of pieces of information processing equipment are arranged in an information processing equipment room located inside the building. Air conditioners are used to cool these information processing equipment rooms. As a cooling method using an air conditioner, for example, an outdoor air cooling method can be mentioned, in which air is cooled by introducing outside air (see Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-245913 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-017674 Summary of the Invention [Problem to be solved by the invention]

[0004] In outdoor air cooling systems, filters are installed in the vents that introduce outdoor air to prevent dust from entering the building. Because data centers require higher levels of cleanliness than ordinary residential buildings, filters with high collection performance are used in the vents. Because filters with high collection performance increase airflow resistance, fans with high static pressure are used to introduce outdoor air. The use of fans with high static pressure increases the air pressure difference between the inside and outside of the building, making it easier for dust and moisture to enter through gaps in the building. For example, if the intake side of a fan is placed in an area facing the exterior wall and negative pressure is created, outdoor air containing dust and moisture may enter the building through gaps in the exterior wall near that area without passing through the filter. For this reason, buildings are constructed to minimize the number of gaps. However, constructing a highly airtight building with small gaps is not easy.

[0005] One aspect of the disclosed technology aims to provide an air conditioning system for a data center that can more easily prevent dust and moisture from entering a data center building. [Means for solving the problem]

[0006] One aspect of the disclosed technology is exemplified by the following air conditioning system for a data center: This data center air conditioning system includes a building with an air vent formed in the lower part of the building, an information processing equipment room provided between the outer wall of the building and the air vent and in which racks accommodating information processing equipment are arranged, an outside air introduction path provided in the lower part of the building and connecting the outside of the building with the air vent, and a blower fan that draws in air from outside the building via the outside air introduction path and the air vent and supplies cool air to the information processing equipment room.

[0007] According to the disclosed technology, since the information processing equipment room is located between the vent and the exterior wall, the vent is located away from the exterior wall of the building. Therefore, the area that becomes negative pressure when the outside air from the vent is sucked in by the blower fan can be located away from the exterior wall of the building. The cool air blown out by the blower fan is supplied from the inside of the building to the outside. Therefore, according to the disclosed technology, it is possible to suppress the intrusion of dust and moisture into the data center building due to the larger pressure difference between the inside and outside of the building.

[0008] The disclosed technology may further include the following feature: In the information processing equipment room, a server is disposed on the upstream side of the cool air, and an auxiliary power supply unit is disposed on the downstream side. By providing these features, it is possible to efficiently cool servers that have strict cooling requirements, and also to cool auxiliary power supplies.

[0009] The disclosed technology may further include the following feature: the auxiliary power supply includes an uninterruptible power supply and a battery, a floor member having a plurality of holes formed therein is provided above the battery, and the uninterruptible power supply is placed on the floor member. Since uninterruptible power supplies often draw cooling air from below using an internal fan, an uninterruptible power supply placed on the floor member can efficiently take in cool air supplied through the floor member into the uninterruptible power supply from below.

[0010] The disclosed technology may further include the following features: The information processing equipment room includes a first information processing equipment room and a second information processing equipment room, and the first information processing equipment room and the second information processing equipment room are arranged on either side of the ventilation opening. By arranging the information processing equipment room and the ventilation opening in this manner, the ventilation opening is further separated from the outer wall. This makes it possible to further suppress the intrusion of dust and moisture into the data center building due to a larger difference in air pressure between the inside and outside of the building.

[0011] The disclosed technology may further include the following feature: The vent is provided with a filter that prevents dust and moisture contained in the outside air from entering the building. By providing such a filter at the opening, the intrusion of dust and moisture into the building is prevented.

[0012] The disclosed technology may further include the following features: The outdoor air introduction path is installed underground. The temperature underground is more stable than above ground. Therefore, even if high-temperature outdoor air is introduced in the summer, for example, the outdoor air is cooled to some extent by flowing through the outdoor air introduction path installed underground. Therefore, the outdoor air drawn into the air conditioner is prevented from becoming too hot. [Effects of the Invention]

[0013] This data center air conditioning system can more easily prevent dust and moisture from entering the data center building. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a plan view showing an example of a building of a data center to which an air conditioning system according to an embodiment is applied. [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 3] FIG. 3 is an example of a side cross-sectional view of a server rack according to an embodiment. [Figure 4] FIG. 4 is a diagram showing the flow of cold air and warm air in a server room. DETAILED DESCRIPTION OF THE INVENTION

[0015] <Embodiment> The configurations of the embodiments described below are merely examples, and the disclosed technology is not limited to the configurations of the embodiments. FIG. 1 is a plan view showing an example of a building 11 of a data center 1 to which an air-conditioning system according to the embodiment is applied. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. The data center 1 includes, for example, one or more buildings 11. In FIG. 1, the air vents 5 formed on the floor 14 of the building 11 of the data center 1 and the cool pit 8 formed below the floor 14 are also illustrated by dotted lines. FIG. 2 also schematically shows the flow of cool air and warm air within the building 11. Note that in this specification, the rightward direction in FIG. 1 is also referred to as the "+X direction," the leftward direction as the "-X direction," the upward direction in FIG. 1 as the "+Y direction," and the downward direction as the "-Y direction." In FIG. 2, the upward direction is also referred to as the "+Z direction," and the downward direction as the "-Z direction."

[0016] The building 11 includes an exterior wall 12, a roof 13, a floor 14, and a eaves 15. The building 11 may be, for example, a flat The building 11 is surrounded by exterior walls 12 that are rectangular (oblong) in plan view. Within the building 11, a corridor 7 is provided along the exterior wall 12, circling the building 11. Within the area surrounded by the corridor 7 in the building 11, for example, four information processing equipment rooms 2, two air conditioning machine rooms 3, and two electrical rooms 4 are provided. The two air conditioning machine rooms 3 are arranged side by side on the center line in the shorter direction of the building 11 in a plan view of the building 11. Furthermore, the two electrical rooms 4 are arranged side by side in a straight line on the center line in the longer direction of the building 11 in a plan view of the building 11. In other words, the two air conditioning machine rooms 3 and the two electrical rooms 4 are arranged in a cross shape in a plan view of the building 11. In the building 11, an air vent 5 is provided in a floor 14 within the air conditioning machine room 3. The vent 5 is provided with a vent filter 51 that prevents dust and moisture contained in the outside air from entering the building 11, and a fourth damper 52 that controls the intake of outside air.

[0017] The cool pit 8 is provided under the floor 14 (for example, underground). The cool pit 8 can be, for example, a piping pit formed underground (underground) in the building 11. The cool pit 8 is formed in a cross shape in a plan view of the building 11, for example, so as to pass under the two air conditioning machine rooms 3 and the two electrical rooms 4. The cool pit 8 is connected to an outside air inlet 9 and a vent 5 provided outside the building 11, and serves as a flow path for air (outside air) outside the building 11 taken in through the outside air inlet 9. The cool pit 8 is an example of an "outside air introduction path." The building 11 and the cool pit 8 are examples of a "building."

[0018] The air conditioning machine room 3 is equipped with a diffusion line fan 31, a blower fan 32, a cooling coil 33, a second damper 34, a humidifier 35, a cooling coil 36, and a third damper 37. The blower fan 32 is installed behind a wall 28 that is located in the information processing equipment room 2 at the boundary with the air conditioning machine room 3. An air outlet is formed in the wall 28 to allow the cool air from the blower fan 32 to pass through. The cool air from the blower fan 32 is supplied to the information processing equipment room 2 through the air outlet formed in the wall 28. The flow of cool air and warm air within the building 11 will be described later. A firewall 6 is installed in the air conditioning machine room 3. Two blower fans 32 are installed with their air outlets facing in opposite directions, with the firewall 6 as the boundary. That is, the blower fans 32 that blow cool air in the "-X direction" are installed on the "-X direction" side of the firewall 6. In the "+X direction" of the firewall 6, a blower fan 32 is arranged, which blows cool air in the "+X direction."

[0019] The information processing equipment room 2 accommodates information processing equipment such as servers, uninterruptible power supplies (UPS), batteries, etc. As can be seen from FIG. 1 , two information processing equipment rooms 2 are arranged on either side of the air conditioning machine room 3 (or the vent 5 provided in the floor 14 of the air conditioning machine room 3). In other words, the information processing equipment rooms 2 are arranged between the outer wall 12 and the vent 5. The information processing equipment rooms 2 include a server room 21 and an auxiliary power supply room 23. In the server room 21, server racks 22 accommodating information processing devices such as servers are arranged aligned in the Y direction.

[0020] In the information processing equipment room 2, the server room 21 is located closer to the air conditioning machine room 3 than the auxiliary power supply room 23 (upstream of the cool air blown out by the blower fan 32 installed in the air conditioning machine room 3). By locating the server room 21 upstream of the auxiliary power supply room 23, it is possible to effectively cool information processing equipment such as servers, which have strict cooling requirements. Furthermore, the cool air passing through the server room 21 is supplied to the auxiliary power supply room 23 through a perforated door 231 with multiple holes, thereby also cooling the battery 233 and the UPS 234. Furthermore, by locating the server room 21, which houses the server racks 22 housing information processing equipment that stores various types of information, away from the exterior wall 12, the data center 1 also meets the information security requirements required of data centers. The information processing equipment room 2 located in the "-X direction" of the air conditioning machine room 3 is an example of a "first information processing equipment room." The information processing equipment room 2 located in the "+X direction" of the air conditioning machine room 3 is an example of a "second information processing equipment room."

[0021] A battery 233 and a UPS 234 are disposed in the auxiliary power supply room 23. The auxiliary power supply room 23 is divided into a first floor and a second floor by a grating floor 232 with multiple holes formed therein. The battery 233 is disposed on the first floor of the auxiliary power supply room 23, and the UPS 234 is disposed on the second floor. Because the grating floor 232 with multiple holes formed therein allows air to pass through, the cool air supplied to the first floor flows into the second floor through the grating floor 232. The battery 233 and the UPS 234 are an example of an "auxiliary power supply device." The grating floor 232 is an example of a "floor member."

[0022] 3 is an example of a side cross-sectional view of a server rack 22 in an embodiment. A rack door 221 formed of a perforated plate with a plurality of holes is provided on the front side (the intake side of the servers 91) of the server rack 22. The back side of the server rack 22 may be open. The server rack 22 has a plurality of rack rails extending horizontally and arranged vertically. Each server 91 is installed on the rack rail of the server rack 22. A plate-shaped blanking panel 222 is provided in front of the rack rails on which no servers 91 are installed to prevent hot air from the hot aisle from leaking into the cold aisle.

[0023] FIG. 4 is a diagram illustrating the flow of cold air and warm air in the server room 21. As illustrated in FIG. 4, multiple server racks 22 are arranged with their front faces (the intake sides of the servers 91 housed in the server racks 22) facing each other. The passage toward which the intake sides of the servers 91 housed in the server racks 22 face is called the cold air passage 211. Flow straighteners 26 are provided at both ends of the cold air passage 211. The flow straighteners 26 are installed to prevent poor intake of cold air into the server racks 22 due to a decrease in static pressure or the formation of turbulence on the intake side of the server racks 22 caused by the high flow rate of the cold air blown out by the blower fans 32. The provision of the flow straighteners 26 allows cold air to flow from the blower fans 32 to the cold air passage 211 at a substantially uniform flow rate. Furthermore, a ceiling 24 and partition plates 25 extending downward from both ends of the ceiling 24 are provided above the cold air passage 211. The ceiling 24 and the partition plate 25 prevent the inflow of warm air from the warm air passage 212 into the cold air passage 211.

[0024] By arranging the multiple server racks 22 so that their fronts face each other, the multiple server racks 22 also face their rears (the exhaust sides of the servers 91 housed in the server racks 22) towards each other. The aisle towards which the exhaust sides of the servers 91 housed in the server racks 22 face is called the hot aisle 212. Blocking plates 27 are provided on both ends of the hot aisle 212. The hot aisle 212 is separated from the space of the server room 21 by the blocking plates 27. The provision of the blocking plates 27 prevents the hot air exhausted into the hot aisle 212 from flowing into the cold aisle 211. The top of the hot aisle 212 is connected to the back of the ceiling 24 (the space above the ceiling 24), and the hot air in the hot aisle 212 flows into the space above the ceiling 24.

[0025] Returning to FIG. 2, the warm air that flows upward from the hot air passage 212 and the warm air that has passed through the auxiliary power supply room 23 is exhausted to the outside, for example, through a first damper 16 provided on the roof 13. The first damper 16 is provided above the air conditioning machine room 3. In other words, the first damper 16 is not provided directly above the information processing equipment room 2. The first damper 16 is normally closed, but is opened when exhausting air. Note that a eaves 15 protrudes in front of the first damper 16 (in the direction of exhaust), which prevents rainwater from entering the building 11 even when the first damper 16 is open.

[0026] Furthermore, the warm air that flows upward from the warm air passage 212 and the warm air that has passed through the auxiliary power supply room 23 is returned to the air conditioning machine room 3 via, for example, the second damper 34 and the third damper 37. When the second damper 34 is open, the warm air that returns to the air conditioning machine room 3 via the second damper 34 is humidified by the humidifier 35 and cooled by the cooling coil 33. When returning the warm air to the air conditioning machine room 3 via the third damper 37, the third damper 37 is also opened. The warm air returned to the air conditioning machine room 3 via the third damper 37 is cooled by the cooling coil 36. In the air conditioning machine room 3, the diffusion line fan 31 thoroughly mixes the outside air drawn in from the vent 5 with the return air returned to the air conditioning machine room 3 via the second damper 34 and the third damper 37. The blower fan 32 can supply the thoroughly mixed air (cool air) to the information processing equipment room 2.

[0027] The air conditioning machine room 3 may be cooled using only outside air (outside air cooling method) with the second damper 34 and the third damper 37 closed, or may be cooled using warm air from inside the building 11 with the second damper 34 and the third damper 37 open and the fourth damper 52 closed (circulation cooling method). When the circulation cooling method is used, the humidifier 35 may be stopped.

[0028] In the building 11, no circulation fan or outside air intake fan is provided in the area (for example, the auxiliary power supply room 23) on the exterior wall 12 side. That is, in this embodiment, outside air is taken in through the vent 5 located in the center of the building 11, and cool air is supplied from the center of the building 11 to the outside (exterior wall 12) by the blower fan 32 in the air conditioning machine room 3.

[0029] <Effects of the embodiment> In this embodiment, the air conditioning machine room 3 is arranged so as to be sandwiched between the two information processing equipment rooms 2, and therefore the cool air supplied by the blower fan 32 flows in a direction from the center of the building 11 toward the exterior wall 12. That is, in this embodiment, the cool air is supplied from near the center of the building 11 toward the exterior wall 12. Furthermore, it is the cool pit 8 that becomes negative pressure due to the air suction by the air conditioning machine room 3, and not the inside of the building 11. Therefore, according to this embodiment, by suppressing the difference in air pressure between the inside and outside of the building 11 (or by increasing the air pressure inside the building 11 more than outside the building 11), it is possible to suppress the intrusion of dust and moisture from outside the building 11 into the building 11.

[0030] As described above, the data center 1 of this embodiment can prevent dust and moisture from entering the building 11 from outside the building 11, thereby increasing the cleanliness of the cool air supplied to the servers 91 and ultimately increasing the cleanliness of the servers 91.

[0031] Furthermore, according to this embodiment, the difference in air pressure between the inside and outside of building 11 is reduced, so that the intrusion of dust and moisture into building 11 is suppressed without the need to make building 11 a highly airtight building with small gaps. This makes it easier to construct building 11. Furthermore, in this embodiment, corridors 7 are provided on the exterior wall 12 side within building 11, and the air conditioning machine room 3 and information processing equipment room 2 are provided within the area surrounded by corridors 7. This makes it possible to further reduce the difference in air pressure between the inside and outside of building 11.

[0032] In this embodiment, the server room 21 is located upstream of the cool air supplied by the blower fan 32, and the auxiliary power supply room 23 is located downstream. A punched door 231 that allows air to circulate is provided at the boundary between the auxiliary power supply room 23 and the server room 21. By adopting this arrangement, this embodiment can efficiently cool the servers 91 that require strict cooling, and can also supply cool air to the auxiliary power supply room 23 via the server room 21 and the punched door 231 to cool the battery 233 and the UPS 234.

[0033] In this embodiment, the auxiliary power supply room 23 is divided into the first and second floors by a grating floor 232, with the battery 233 located on the first floor and the UPS 234 located on the second floor. The UPS 234 is equipped with a fan inside, and often cools the inside by drawing in cooling air from the bottom and discharging it from the top. By arranging the UPS 234 in this manner, the cool air supplied through the first floor of the auxiliary power supply room 23 can be efficiently taken into the UPS 234 by the fan of the UPS 234.

[0034] In this embodiment, an air vent filter 51 is provided in the air vent 5. In this embodiment, the air vent filter 51 can remove dust and moisture from the outside air introduced into the building 11 through the air vent 5, and thus can prevent dust and moisture from entering the building 11 from outside.

[0035] In this embodiment, no circulation fan or outside air intake fan is provided in the area on the exterior wall 12 side (for example, the auxiliary power supply room 23 or the corridor 7). In this embodiment, by adopting such a configuration, it is possible to prevent the area on the exterior wall 12 side from becoming negative pressure.

[0036] In this embodiment, the air conditioning machine room 3 is disposed on the central side (inside) of the building 11, so that piping and the like are concentrated on the central side of the building 11. Therefore, according to this embodiment, the amount of work involved in the construction work of the building 11 can be reduced.

[0037] In this embodiment, the first damper 16 is not placed directly above the server room 21, but is placed above the air conditioning machine room 3. Therefore, according to this embodiment, even if rainwater enters the building 11 through the first damper 16, the rainwater is prevented from falling into the server room 21.

[0038] <Modification> In the embodiment described above, air conditioning machine rooms 3 are provided with air outlet directions facing in opposite directions, with the firewall 6 as the boundary. However, in the building 11, an air conditioning machine room 3 that cools the information processing equipment room 2 in the "-X direction" and an air conditioning machine room 3 that cools the information processing equipment room 2 in the "+X direction" may be combined into a single air conditioning machine room 3. In this case, the air conditioning machine room 3 may be provided with a blower fan 32 that blows cool air in the "-X direction" and a blower fan 32 that blows cool air in the "+X direction."

[0039] In the embodiment described above, no fan for taking in outside air and no fan for exhausting air are provided, but a fan for taking in outside air and a fan for exhausting air may be provided. By providing the fan for taking in outside air at the vent 5 and providing the fan for exhausting air next to the first damper 16, the amount of outside air taken into the building 11 and the amount of exhausted air exhausted from the building 11 can be adjusted by controlling the rotation speed of the fan for taking in outside air and the fan for exhausting air.

[0040] Here, if no fan for taking in outside air is provided in the air vent 5, outside air is also taken in using the power of the blower fan 32, and the static pressure inside the air conditioning machine room 3 becomes higher than when no fan for taking in outside air is provided. By providing an outside air intake fan in the air vent 5 and taking in outside air using the fan for taking in outside air, the static pressure in the air conditioning machine room 3 can be reduced accordingly, making it possible to further suppress the intrusion of outside air from places other than the air vent filter 51. Furthermore, if at least the outer walls (floor panels) around the air vent 5 and the air vent filter 51 are constructed with a panel structure with increased airtightness, it is possible to further prevent outside air from entering from places other than the air vent filter 51.

[0041] In the embodiment described above, a temperature and humidity sensor is not provided, but a temperature and humidity sensor may be provided. For example, a temperature and humidity sensor that detects the temperature and humidity outside the building 11 (outdoor temperature and humidity) may be provided outside the building 11, and a temperature and humidity sensor that detects the temperature and humidity inside the building 11 (indoor temperature and humidity) may be provided inside the building 11. Then, if the temperature and humidity are such that the outdoor air cooling method is effective based on the detected outdoor temperature and humidity and indoor temperature and humidity, the outdoor air cooling method may be selected as the ventilation method. The fourth damper 52 of the vent 5 may be opened to introduce outside air. The amount of outside air taken in through the vent 5 can be adjusted by controlling the opening degree of the fourth damper 52. Furthermore, the opening degree of the first damper 16 may be controlled to exhaust to the outdoors approximately the same amount of air as the outside air taken in through the vent 5. If it is determined that the outside air cooling method is not effective based on the detected outside temperature and humidity and the indoor temperature and humidity, the fourth damper 52 and the first damper 16 may be closed to switch to the circulation cooling method. The control of the opening degrees of the fourth damper 52 and the first damper 16 based on the temperature and humidity detected by the temperature and humidity sensor may be executed by a computer including a processor and a memory.

[0042] In the embodiment described above, the building 11 is formed to have a rectangular shape in a plan view, but the building 11 may be formed to have a shape other than a rectangle in a plan view. For example, the building 11 may be formed to have a circular shape or a polygonal shape with pentagons or more sides in a plan view.

[0043] The embodiments and modifications disclosed above can be combined with each other. [Explanation of symbols]

[0044] 1. Data Center 2. Information Processing Equipment Room 3. Air conditioning machine room 4. Electrical Room 5. Ventilation hole 6.Fire wall 7. Hallway 8. Cool Pit 9. Fresh air intake 11. Building 12. Exterior wall 13. Roof 14 floors 15. Eaves 16. First damper 21. Server Room 22 Server Racks 23...Auxiliary power supply room 24. Ceiling 25··Partition plate 26...Fluid rectifier 27...occlusion plate 28. Wall 31 Diffusion Line Fan 32 Blower fan 33. Cooling coil 34 Second damper 35...humidifier 36. Cooling coil 37··Third damper 51··Ventilation filter 52··4th damper 91··Server 211 Cold Aisle 212··Hot aisle 221··Rack door 222··Blank Panel 231··Perforated door 232··Grating floor 233 Battery 234··UPS

Claims

1. An information processing equipment room provided within a building and housing information processing equipment, A ventilation opening that draws air supplied to the information processing equipment room from outside the building into the building, The system includes a fan that draws in outside air from the building introduced into the ventilation opening and supplies it to the information processing equipment room, The aforementioned information processing equipment room is provided between the outer wall of the building and the ventilation opening. All of the ventilation openings that draw air into the building from outside the building to supply air to the information processing equipment room are not provided in areas closer to the outer wall than the information processing equipment room. Air conditioning system for data centers.

2. An information processing equipment room provided within a building and housing information processing equipment, A ventilation opening that draws air supplied to the information processing equipment room from outside the building into the building, The system includes a fan that draws in outside air from the building introduced into the ventilation opening and supplies it to the information processing equipment room, The aforementioned information processing equipment room is provided between the outer wall of the building and the ventilation opening. All of the blower fans that draw in outside air introduced into the ventilation opening and supply it to the information processing equipment room are not installed in areas closer to the outer wall than the information processing equipment room. Air conditioning system for data centers.

3. An information processing equipment room provided within a building and housing information processing equipment, A ventilation opening that draws air supplied to the information processing equipment room from outside the building into the building, The system includes a fan that draws in outside air from the building introduced into the ventilation opening and supplies it to the information processing equipment room, The aforementioned information processing equipment room is provided between the outer wall of the building and the ventilation opening. In the aforementioned information processing equipment room, the auxiliary power supply is located in an area closer to the outer wall than the area where the servers are located. Air conditioning system for data centers.

4. An information processing equipment room provided within a building and housing information processing equipment, A ventilation opening that draws air supplied to the information processing equipment room from outside the building into the building, The system includes a fan that draws in outside air from the building introduced into the ventilation opening and supplies it to the information processing equipment room, The aforementioned information processing equipment room is provided between the outer wall of the building and the ventilation opening. The air supplied to the information processing equipment room by the blower fan is supplied to a first area where servers are located in the information processing equipment room, and then supplied via the first area to a second area where auxiliary power supply devices are located. Air conditioning system for data centers.

5. An information processing equipment room provided within a building and housing information processing equipment, A ventilation opening that draws air supplied to the information processing equipment room from outside the building into the building, The system includes a fan that draws in outside air from the building introduced into the ventilation opening and supplies it to the information processing equipment room, The aforementioned information processing equipment room is provided between the outer wall of the building and the ventilation opening. The server is positioned upstream of the air supplied to the information processing equipment room by the aforementioned fan. An auxiliary power supply unit is located downstream of the air supplied to the aforementioned information processing equipment room. The auxiliary power supply device includes an uninterruptible power supply and a battery. A floor member with multiple holes is provided above the battery. The uninterruptible power supply is placed on the floor member. Air conditioning system for data centers.

6. In the aforementioned information processing equipment room, the server is located upstream of the air, and the auxiliary power supply is located downstream. A data center air conditioning system according to any one of claims 1 to 4.

7. The aforementioned information processing equipment room includes a first information processing equipment room and a second information processing equipment room. The first information processing equipment room and the second information processing equipment room are arranged so as to sandwich the ventilation opening, A data center air conditioning system according to any one of claims 1 to 6.

8. The aforementioned ventilation opening is equipped with a filter to prevent dust and moisture contained in the outside air from entering the building. A data center air conditioning system according to any one of claims 1 to 7.

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