Air conditioning system and method for data center

Abstract

To provide an air conditioning system for a data center capable of efficiently cooling an information processing apparatus and an uninterruptible power supply device.SOLUTION: An air conditioning system for a data center having an information processing device room in which racks storing an information processing apparatus are lined up and an electrical equipment room arranged next to the information processing device room and having an uninterruptible power supply device for supplying power to the information processing apparatus installed includes a first path connecting to an upper part of the electrical equipment room from an upper part of the information processing apparatus room, a second path connecting to a lower part of the information processing apparatus room from a lower part of the electrical equipment room, a cooling coil provided in the middle of the first path to cool air flowing from the information processing apparatus room to the electrical equipment room, and a blower fan for generating circulation flow of air flowing from the information processing apparatus room through the first path via the electrical equipment room and from the electrical equipment room to the information processing apparatus room through the second path.SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] With the development of information processing technology, the amount of heat generated by information processing devices is steadily increasing. Accordingly, the processing capacity of the air conditioning systems in the information processing device rooms that cool the information processing devices is also increasing, and air conditioning technologies that can efficiently cool the information processing devices are being developed (for example, see Patent Documents 1-3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5541518 [Patent Document 2] Patent No. 6804735 [Patent Document 3] JP 2012-78056 A Summary of the Invention [Problem to be solved by the invention]

[0004] Data centers that house many information processing devices use uninterruptible power supplies to prepare for loss of external power sources and momentary voltage drops. While information processing devices constantly generate a large amount of heat, uninterruptible power supplies only generate a small amount of heat from inverters and converters that perform AC / DC conversion using switching elements. For this reason, air conditioning systems installed in data centers tend to focus mainly on processing the heat generated by information processing devices, but because the operating temperature conditions are set for the storage batteries of uninterruptible power supplies, it is also necessary to give sufficient consideration to cooling the uninterruptible power supplies.

[0005] Therefore, taking into account the increase and decrease in specific gravity due to changes in air temperature, it is possible to install the uninterruptible power supply on a lower floor than the information processing equipment. However, designing interior spaces and facilities that span multiple floors complicates the construction of the building and reduces the versatility of the building.

[0006] The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide an air conditioning system for a data center that can efficiently cool information processing equipment and uninterruptible power supplies. [Means for solving the problem]

[0007] In order to solve the above problems, in the present invention, an electrical equipment room in which an uninterruptible power supply unit that supplies power to information processing equipment is installed is positioned next to the information processing equipment room in which racks housing information processing equipment are aligned, and a first path connecting the top of the information processing equipment room to the top of the electrical equipment room and a second path connecting the bottom of the electrical equipment room to the bottom of the information processing equipment room are provided, and a cooling coil is provided midway along the first path.

[0008] In detail, the present invention is an air conditioning system for a data center having an information processing equipment room in which racks housing information processing equipment are aligned, and an electrical equipment room arranged next to the information processing equipment room in which an uninterruptible power supply unit that supplies power to the information processing equipment is installed, the air conditioning system comprising a first path connecting from the top of the information processing equipment room to the top of the electrical equipment room, a second path connecting from the bottom of the electrical equipment room to the bottom of the information processing equipment room, a cooling coil provided midway along the first path for cooling the air flowing from the information processing equipment room to the electrical equipment room, and a blower fan for generating a circulating flow of air that flows from the information processing equipment room through the first path, via the electrical equipment room, and from the electrical equipment room through the second path to the information processing equipment room.

[0009] The air exhausted from the information processing equipment is likely to rise due to the specific gravity because the temperature of the air is increased by the exhaust heat from the equipment. The air cooled by the cooling coil is likely to fall due to the specific gravity because the temperature of the air is decreased by the cooling. The amount of heat generated by the uninterruptible power supply is small compared to the amount of heat generated by the information processing equipment in the information processing equipment room. Therefore, in the above air conditioning system, a first path connecting the upper part of the information processing equipment room to the upper part of the electrical equipment room and a second path connecting the lower part of the electrical equipment room to the lower part of the information processing equipment room are provided, and a circulating flow of air is generated by a blower fan along these paths. In addition, a cooling coil for cooling the air is provided in the middle of the first path. This makes it possible to efficiently circulate the air by the blower fan while taking advantage of the natural circulation force of the air, which utilizes the increase and decrease in specific gravity due to the change in temperature of the air. Therefore, the above air conditioning system can efficiently cool the information processing equipment and the uninterruptible power supply.

[0010] The first path may be disposed above the second path, which allows the paths to be disposed efficiently.

[0011] The second path may be disposed to the side of the rack in the information processing equipment room and have a cool air outlet opening toward the rack. With this, the cool air flowing from the bottom of the electrical equipment room to the bottom of the information processing equipment room flows to the rack housing the information processing equipment, so that the information processing equipment can be efficiently cooled.

[0012] The air outlet may be open toward an end of an aisle formed between a pair of rack rows facing each other, so that the cool air flowing from the lower part of the electrical equipment room to the lower part of the information processing equipment room flows into the aisle between the rack rows, thereby efficiently cooling the information processing equipment of each rack.

[0013] The second path may be a path along the longitudinal direction of an aisle formed between a pair of rack rows whose intake surfaces face each other. In this way, the cool air flowing from the lower part of the electrical equipment room to the lower part of the information processing equipment room flows along the aisle between the rack rows, so that the information processing equipment of each rack can be efficiently cooled.

[0014] The first path may have an intake port located in the upper part of the information processing equipment room, and the blower fan may be located in the first path between the intake port and the cooling coil. With this, the air exhausted from the information processing equipment and rising can be taken in by the blower fan from the intake port in the upper part of the information processing equipment room, and the air whose temperature has risen due to the exhaust heat from the information processing equipment can be efficiently cooled by the cooling coil. Effect of the Invention

[0015] The above-mentioned air conditioning system for a data center can efficiently cool information processing equipment and uninterruptible power supplies. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a diagram showing an air conditioning system for a data center according to an embodiment. [Diagram 2] Figure 2 is a diagram explaining the circulating air flow. [Diagram 3] FIG. 3 is an example of a top view of a data center. [Figure 4] FIG. 4 is a first diagram showing a modified example. [Diagram 5] FIG. 5 is a second diagram showing the modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The following describes an embodiment of the present invention. The following is an example, and the technical scope of the present invention is not limited to the following embodiment.

[0018] Fig. 1 is a diagram showing an air conditioning system for a data center according to an embodiment. The air conditioning system 1 is a system installed in a data center having server racks 4 arranged in a server room 2 and uninterruptible power supplies 5 arranged in an electrical equipment room 3, and is responsible for cooling the server racks 4 and the uninterruptible power supplies 5. Note that, although the server racks 4 and the uninterruptible power supplies 5 are illustrated in Fig. 1, the data center to which the air conditioning system 1 is applied is not limited to one having the server racks 4 and the uninterruptible power supplies 5, and may have other electrical equipment.

[0019] In the server room 2, many server racks 4 are lined up, housing information processing devices such as servers and communication devices that perform various types of calculation processing and database management. Each server rack 4 is provided with a cooling fan for cooling the information processing devices, and is configured so that either the front or back of the rack is the intake side and the other is the exhaust side. The cooling fans for the information processing devices in each server rack 4 may be controlled to change their rotation speed from moment to moment depending on the load state and intake temperature of the information processing devices housed in the rack, or may operate at a constant rotation speed. In places where there are gaps within the server racks 4 or between the server racks 4 due to reasons such as no information processing devices being installed, it is preferable to close the gaps with panels that prevent warm air from circulating.

[0020] The server racks 4 arranged in the server room 2 are arranged so that the intake and exhaust sides of each server rack 4 constituting one rack row are aligned to ensure efficient supply of cold air. Two opposing rack rows are arranged so that their intake or exhaust sides face each other. By installing each server rack 4 in this manner, aisles through which cold air flows and aisles through which warm air flows are alternately formed between each rack row. Hereinafter, an aisle through which cold air flows that is surrounded by a pair of rack rows with intake sides facing each other is referred to as a cold aisle C, and an aisle through which warm air flows that is surrounded by a pair of rack rows with exhaust sides facing each other is referred to as a hot aisle H.

[0021] Partitions 7 that separate the hot aisle H from the cold aisle C are provided between both ends of the two rack rows that sandwich one hot aisle H, and between the rack rows and the ceiling board 15. These partitions 7 block the flow of air. If the height of each server rack 4 is the same as the ceiling board 15, the partitions 7 placed between the rack rows and the ceiling board 15 are not necessary. Because the portion of the ceiling board 15 above the hot aisle H is open, the warm air in the hot aisle H surrounded by the partitions 7 flows into the space above the ceiling board 15, above the ceiling board 15, without flowing around to the cold aisle C side.

[0022] In addition, flow straightening materials for adjusting the flow speed of the cold air may be provided on both ends of the two rack rows that sandwich one cold aisle C. As the flow straightening materials, a mesh net, a punched plate, a wire mesh, a cloth, etc. can be used.

[0023] Next to the server room 2 is the electrical equipment room 3 in which the uninterruptible power supply 5 is installed. The uninterruptible power supply 5 is a device that stably supplies power to the server racks 4 even if the external power source is lost or a momentary voltage drop occurs, and incorporates, for example, an inverter that performs AC-DC conversion using switching elements, a converter that performs AC-DC conversion using rectifiers, a storage battery that stores electricity, and various other electrical components. The uninterruptible power supply 5 inserts a converter and an inverter, in that order from the external power source side, in the power line connecting the external power transmission line and the server racks 4, and connects a storage battery in parallel between the converter and the inverter, thereby temporarily converting the AC external power source to DC and then converting it back to AC to supply power to the server racks 4. The uninterruptible power supply 5 also supplies power to the server racks 4 by switching the converter to the inverter when the external power source is lost or a momentary voltage drop occurs. Even if the power supply to the converter is cut off, the power supply to the server rack 4 is continued uninterrupted by supplying power to the inverter from the storage battery connected in parallel between the converter and the inverter. Therefore, the uninterruptible power supply 5 continues to generate heat due to the constant operation of the elements of the converter and inverter, and a small amount of heat due to the continued floating charge of the storage battery. The amount of heat generated by the uninterruptible power supply 5 is small compared to the amount of heat generated by the server rack 4, but since the storage battery of the uninterruptible power supply 5 has a specified operating temperature condition (for example, 25°C or less), the electrical equipment room 3 in which the uninterruptible power supply 5 is installed also needs to be appropriately cooled. In addition, even if the amount of heat generated by the uninterruptible power supply 5 itself is small compared to the server rack 4, the operating temperature condition specified for the storage battery of the uninterruptible power supply 5 is generally stricter (lower) than the operating temperature condition specified for the server rack 4. Therefore, when comparing temperature conditions, it can be said that the electrical equipment room 3 needs to be kept cooler than the server room 2. In addition, depending on the design conditions of the data center building, rooms in which a large number of storage batteries are installed may be required to be partitioned off with fire dampers or fire walls from a disaster prevention standpoint.

[0024] Therefore, the air conditioning system 1 of this embodiment employs the following equipment configuration. That is, the air conditioning system 1 does not basically employ outside air introduction, and has a path for circulating air between the server room 2 and the electrical equipment room 3. Then, considering that the electrical equipment room 3 needs to be kept at a lower temperature than the server room 2, and that the amount of heat generated by the uninterruptible power supply 5 installed in the electrical equipment room 3 is small compared to the server rack 4, a cooling coil 11 for cooling air is installed in the path (corresponding to the "first path" in this application) connecting the server room 2 to the electrical equipment room 3. Also, considering that heated air rises due to a decrease in specific gravity caused by expansion, and cooled air falls due to an increase in specific gravity caused by contraction, the path connecting the server room 2 to the electrical equipment room 3 is configured to connect from the upper part of the server room 2 to the upper part of the electrical equipment room 3, and the path connecting the electrical equipment room 3 to the server room 2 (corresponding to the "second path" in this application) is configured to connect from the lower part of the electrical equipment room 3 to the lower part of the server room 2. Therefore, as shown in FIG. 1, the cooling coil 11 is disposed at a relatively high position on the floor on which the server room 2 and the electrical equipment room 3 are located.

[0025] The cooling coil 11 is a cooling coil through which cold water flows, and cools the air passing through it. The cold water flowing through the cooling coil 11 is supplied by a refrigerator or cold water circulation equipment installed at an appropriate location in the building in which the air conditioning system 1 is installed. Thus, the hot air exhausted from the exhaust surface of the server rack 4 rises from the hot aisle H to the ceiling space above the ceiling board 15, and is cooled by the cooling coil 11 by being sent toward the cooling coil 11 by a blower fan 8 installed on a partition plate 14 forming a side wall of the ceiling space. The air cooled by the cooling coil 11 then flows into the electrical equipment room 3 through a fire damper 10 installed on a partition plate 6 that separates the space in which the cooling coil 11 is installed from the electrical equipment room 3. The cold air that flows into the electrical equipment room 3 flows down inside the electrical equipment room 3 to cool the uninterruptible power supply 5 and other devices, and is then sent from the electrical equipment room 3 to the server room 2 by a blower fan 12 installed on a partition plate 13 that separates the electrical equipment room 3 from the server room 2. The cold air sent into the server room 2 is sucked in from the cold aisle C into the intake surfaces of each server rack 4, where it becomes hot again.

[0026] FIG. 2 is a diagram explaining the circulating flow of air. In FIG. 2, a side view of the data center is shown to make it easier to understand the circulation of air generated by the air conditioning system 1. As can be seen from FIG. 2, the electrical equipment rooms 3 are arranged roughly symmetrically on either side of the server room 2. Also, as shown in FIG. 2, the cooling coil 11 is arranged at a relatively high position on the floor on which the server room 2 and the electrical equipment room 3 are located. Therefore, the high-temperature air exhausted from the exhaust surface of the server racks 4 rises from the hot aisle H into the attic space above the ceiling board 15, and is cooled by the cooling coil 11 set up against the partition board 14 that forms the side wall of the attic space. The air is then cooled by being sent to the cooling coil 11 by a blower fan 8 attached to the partition plate 6 which separates the space in which the cooling coil 11 is installed from the electrical equipment room 3. The cold air that has flowed into the electrical equipment room 3 flows down inside the electrical equipment room 3 to cool the uninterruptible power supply 5 and other equipment, and is then sent from the electrical equipment room 3 to the server room 2 by a blower fan 12 attached to the partition plate 13 which separates the electrical equipment room 3 from the server room 2. The cold air sent into the server room 2 is sucked from the cold aisle C into the intake surface of each server rack 4, where it becomes hot again. Since the amount of heat generated by the uninterruptible power supply 5 is small compared to the server racks 4, in the air conditioning system 1 designed primarily to cool the server racks 4, the temperature rise when the air cooled by the cooling coils 11 passes through the electrical equipment room 3 is small, and the air sent from the electrical equipment room 3 to the server room 2 is able to sufficiently cool the server racks 4.

[0027] In the air conditioning system 1 of the present embodiment, such an air circulation path is formed, so that the air can be circulated efficiently by the blower fan 8 and the blower fan 12 while taking advantage of the natural air circulation force that utilizes the increase and decrease in specific gravity due to the temperature change of the air. Therefore, it is possible to reduce the power required for the blower fan 8 and the blower fan 12, and it is possible to suppress the power consumption and the number of fans required for air circulation. In addition, in the air conditioning system 1 of the present embodiment, since the air circulation path does not span multiple floors, there is an extremely low possibility that the construction of the building will be complicated or the versatility of the building will be reduced. Therefore, for example, it is possible to convert the building of a data center in which the air conditioning system 1 is installed to various purposes such as an office or a logistics warehouse.

[0028] FIG. 3 is an example of a view of a data center viewed from above. In the air conditioning system 1 of this embodiment, such a circulating air flow is formed, so that the layout of each device when the data center is viewed from above can be, for example, as shown in FIG. 3, in which the electrical equipment room 3 extends along both sides of the server room 2. Usually, the space required for installing the uninterruptible power supply 5 is smaller than the space required for installing the server rack 4. For this reason, if the uninterruptible power supply 5 is installed on a floor lower than the server rack 4, the space for installing the uninterruptible power supply 5 becomes excessive, and there is a possibility that wasted space that is not effectively used will inevitably occur. In this regard, if the electrical equipment room 3 is arranged next to or on both sides of the server room 2 as in this embodiment, the electrical equipment room 3 can be made the minimum size required for installing the uninterruptible power supply 5, so that the space in the building can be effectively used. The air conditioning system 1 of this embodiment is not limited to application to the layout shown in Figure 3, and may, for example, be arranged in a configuration in which the electrical equipment room 3 is placed on only one side of the server room 2, or the server room 2 and the electrical equipment room 3 may be non-rectangular.

[0029] In addition, in the air conditioning system 1 of the above embodiment, the blower fan 8 and the blower fan 12 are provided, but either one of the blower fan 8 and the blower fan 12 may be omitted. In addition, the blower fan 8 and the blower fan 12 are not limited to being provided in the positions described above. For example, the blower fan 8 may be provided on the partition plate 6 instead of the partition plate 14. In this case, the fire damper 10 is provided integrally with the blower fan 8, or is provided on the partition plate 14, or is omitted.

[0030] In addition, in the air conditioning system 1 of the above embodiment, the path leading from the top of the server room 2 to the top of the electrical equipment room 3 is located above the path leading from the lower part of the electrical equipment room 3 to the lower part of the server room 2, but this is not limited to a form in which it is located directly above the path leading from the lower part of the electrical equipment room 3 to the lower part of the server room 2. The path leading from the upper part of the server room 2 to the upper part of the electrical equipment room 3 may be located in a position other than above the path leading from the lower part of the electrical equipment room 3 to the lower part of the server room 2.

[0031] Furthermore, in the air conditioning system 1 of the above embodiment, the uninterruptible power supply 5 is disposed at a position away from the wall of the electrical equipment room 3, but the uninterruptible power supply 5 may be disposed, for example, along a wall surface of the electrical equipment room 3 that is distal from the server room 2. If the uninterruptible power supply 5 is disposed in such a position, the flow of cool air that has passed through the cooling coils 11 is less likely to be impeded by the uninterruptible power supply 5 in the electrical equipment room 3, so that air can be circulated smoothly throughout the entire air conditioning system 1.

[0032] In the air conditioning system 1 of the above embodiment, the cooling coil 11 can be installed in various configurations. Fig. 4 is a first diagram showing a modified example, and Fig. 5 is a second diagram showing the modified example.

[0033] In the above embodiment, the cooling coil 11 is installed perpendicular to the horizontal direction, but the cooling coil 11 may be installed diagonally to the horizontal direction, for example, as shown in FIG. 4(A1) or FIG. 4(A2). It is not easy to ensure a sufficient height for the path leading from the upper part of the server room 2 to the upper part of the electrical equipment room 3, because a path leading from the lower part of the electrical equipment room 3 to the lower part of the server room 2 must be secured below the path. Therefore, if the cooling coil 11 is installed vertically, it may be difficult to ensure a sufficient effective area of ​​the cooling coil 11. However, if the cooling coil 11 is installed diagonally as shown in FIG. 4(A1) or FIG. 4(A2), the effective area of ​​the cooling coil 11 can be increased.

[0034] In the above embodiment, the cooling coil 11 is an integrated part from the upper side to the lower side of the path, but the cooling coil 11 may be divided into two parts, one for the upper side and one for the lower side of the path, as shown in Fig. 4(B1) and Fig. 4(B2). In this case, even if the cooling coil 11 is installed at an angle, the length along the path can be reduced, so that the effective area of ​​the cooling coil 11 can be increased even if the space between the blower fan 8 and the fire damper 10 is narrow.

[0035] Furthermore, in the air conditioning system 1 of the above embodiment, the height of the space in which the cooling coil 11 is installed can be changed as appropriate depending on the size of the cooling coil 11. For example, when the cooling coil 11 is relatively large, a height that can accommodate the large cooling coil 11 is ensured in the path leading from the upper part of the server room 2 to the upper part of the electrical equipment room 3, as shown in Fig. 4(C1). Also, when the cooling coil 11 is relatively small, for example, the height of the path leading from the upper part of the server room 2 to the upper part of the electrical equipment room 3 can be set to the minimum height that can accommodate the cooling coil 11, as shown in Fig. 4(C2), thereby making it possible to make the height of the path leading from the lower part of the electrical equipment room 3 to the lower part of the server room 2 relatively large.

[0036] In the air conditioning system 1 of the above embodiment, the cooling coil 11 may be disposed in the upper part of the electrical equipment room 3, on the distal side from the server room 2. For example, as shown in Figs. 5(A) to (C), if the cooling coil 11 is disposed in the upper part of the electrical equipment room 3, on the distal side from the server room 2, it is possible to avoid disposing the branch pipe connecting the vertical pipe and the cooling coil 11 and the cooling coil 11 directly above the uninterruptible power supply 5 by disposing the chilled water vertical pipe passing through the cooling coil 11 on each floor in the outer part of the electrical equipment room 3, such as the outer wall of the building. In addition, the length of the branch pipe and the length of the electric wire connecting the uninterruptible power supply 5 and the server rack 4 can be shortened compared to the cases shown in Figs. 2, 4, etc., and therefore the man-hours and costs for laying the piping and electric wires can be reduced.

[0037] In the above embodiment and modified example, the cooling coil 11, the partition plate 6, etc. are installed in the building through on-site construction. However, the air conditioning system 1 may be provided with an intake and exhaust port for forming a path from the top of the server room 2 to the top of the electrical equipment room 3, and an exhaust port for forming a path from the bottom of the electrical equipment room 3 to the top of the electrical equipment room 3. The server room 2 has an intake and exhaust port for forming a path leading from the server room 2 to the bottom, and may be an integrated air conditioner with built-in blower fan 8, blower fan 12, cooling coil 11, etc. Such an air conditioner can be easily installed on-site, since it is only necessary to install it inside the building and provide a partition plate.

[0038] In addition, the air conditioning system 1 can be modified appropriately without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0039] C Cold Aisle H. Hot Aisle 1. Air conditioning system 2. Server room 3. Electrical Equipment Room 4··Server rack 5...Uninterruptible power supply 6,7,13,14 Partition plate 7. Partition plate 8,12··Ventilation fan 9. Partition plate 10. Fire damper 11. Cooling coil 15 Ceiling board

Claims

1. 1. An air conditioning system for a data center having an information processing equipment room in which racks accommodating information processing equipment are aligned, and an electrical equipment room arranged adjacent to the information processing equipment room in a lateral direction and in which an uninterruptible power supply unit for supplying power to the information processing equipment is installed, a first path connecting an upper portion of the information processing device room to an upper portion of the electrical equipment room; a second path connecting a lower portion of the electrical equipment room to a lower portion of the information processing device room; a cooling coil that is provided in the middle of the first path and is therefore located at a higher position than the uninterruptible power supply, and that cools air flowing from the information processing equipment room to the electrical equipment room; a blower fan that generates a circulating current of air that rises in the information processing equipment room due to heat of the information processing equipment, passes from the information processing equipment room through the first path, is cooled by the cooling coil, flows from the first path into the electrical equipment room, falls to a lower part in the electrical equipment room, and flows from the lower part in the electrical equipment room through the second path into the information processing equipment room. Air conditioning system for data centers.

2. An air conditioning system for a data center having an information processing equipment room in which racks accommodating information processing equipment are aligned, and an electrical equipment room arranged next to the information processing equipment room and in which an uninterruptible power supply unit for supplying power to the information processing equipment is installed, a first path connecting an upper portion of the information processing device room to an upper portion of the electrical equipment room; a second path connecting a lower portion of the electrical equipment room to a lower portion of the information processing device room; a cooling coil provided in the first path and configured to cool air flowing from the information processing equipment room to the electrical equipment room; a blower fan that generates a circulating flow of air that flows from the information processing equipment room through the first path, via the electrical equipment room, and from the electrical equipment room through the second path to the information processing equipment room, The blower fan is disposed in the first path upstream of the cooling coil. Air conditioning system for data centers.

3. An air conditioning system for a data center having an information processing equipment room in which racks accommodating information processing equipment are aligned, and an electrical equipment room arranged next to the information processing equipment room and in which an uninterruptible power supply unit for supplying power to the information processing equipment is installed, a first path connecting an upper portion of the information processing device room to an upper portion of the electrical equipment room; a second path connecting a lower portion of the electrical equipment room to a lower portion of the information processing device room; a cooling coil provided in the first path and configured to cool air flowing from the information processing equipment room to the electrical equipment room; a blower fan that generates a circulating flow of air that flows from the information processing equipment room through the first path, via the electrical equipment room, and from the electrical equipment room through the second path to the information processing equipment room, the first path has an intake port disposed in an upper portion of the information processing equipment room, The blower fan is disposed in the first path between the air inlet and the cooling coil. Air conditioning system for data centers.

4. The first path is disposed above the second path.

3. An air conditioning system for a data center according to claim 1 or 2.

5. The cooling coil is disposed at a location other than directly above the uninterruptible power supply. An air conditioning system for a data center according to any one of claims 1 to 4.

6. the second path is disposed to the side of the rack in the information processing equipment room and has a cool air outlet opening toward the rack; An air conditioning system for a data center according to any one of claims 1 to 5.

7. The air outlet is open toward an end of an aisle formed between a pair of rack rows in which the intake surfaces of the racks face each other. The air conditioning system for a data center according to claim 6.

8. the second path is a path along a longitudinal direction of an aisle formed between a pair of rack rows in which the intake surfaces of the racks face each other; An air conditioning system for a data center according to any one of claims 1 to 7.

9. An air conditioning method for an air conditioning system for a data center having an information processing equipment room in which racks accommodating information processing equipment are aligned, and an electrical equipment room arranged adjacent to the information processing equipment room in a lateral direction and in which an uninterruptible power supply unit for supplying power to the information processing equipment is installed, comprising: a first path connecting an upper portion of the information processing device room to an upper portion of the electrical equipment room; a second path connecting a lower portion of the electrical equipment room to a lower portion of the information processing device room; a cooling coil that is provided in the middle of the first path and is therefore located at a higher position than the uninterruptible power supply, and that cools the air flowing from the information processing equipment room to the electrical equipment room; a circulating flow of air is generated by a blower fan, the air rising in the information processing equipment room due to heat of the information processing equipment, passing from the information processing equipment room through the first path, being cooled by the cooling coil, flowing from the first path into the electrical equipment room, descending to a lower portion in the electrical equipment room, and flowing from the lower portion in the electrical equipment room through the second path into the information processing equipment room; Air conditioning methods for data centers.

10. An information processing equipment room in which racks accommodating information processing equipment are arranged, and an electrical facility in which an uninterruptible power supply unit that supplies power to the information processing equipment is installed and that is disposed next to the information processing equipment room. An air conditioning method for an air conditioning system for a data center having an equipment room, comprising: a first path connecting an upper portion of the information processing device room to an upper portion of the electrical equipment room; a second path connecting a lower portion of the electrical equipment room to a lower portion of the information processing device room; a cooling coil provided in the middle of the first path and configured to cool air flowing from the information processing equipment room to the electrical equipment room, a circulating flow of air that flows from the information processing equipment room through the first path, via the electrical equipment room, and from the electrical equipment room through the second path to the information processing equipment room is generated by a blower fan that is disposed upstream of the cooling coil in the first path; Air conditioning methods for data centers.

11. An air conditioning method for an air conditioning system for a data center having an information processing equipment room in which racks accommodating information processing equipment are aligned, and an electrical equipment room arranged next to the information processing equipment room and in which an uninterruptible power supply unit for supplying power to the information processing equipment is installed, comprising: a first path connecting an upper portion of the information processing device room to an upper portion of the electrical equipment room; a second path connecting a lower portion of the electrical equipment room to a lower portion of the information processing device room; a cooling coil provided in the first path and configured to cool air flowing from the information processing equipment room to the electrical equipment room, The first path is provided by the air conditioning system having an air intake located at an upper portion of the information processing equipment room, a circulating flow of air that flows from the information processing equipment room through the first path, via the electrical equipment room, and from the electrical equipment room through the second path to the information processing equipment room is generated by a blower fan that is disposed upstream of the cooling coil in the first path; Air conditioning methods for data centers.

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