JP2013047577A - Information processing system and data center - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate design of an information processing system.SOLUTION: The information processing system includes: a rack installed on a boundary between a cold aisle and a hot aisle; an information processor mounted on the rack; a cooling fan for sending air from the cold aisle to the hot aisle to cool the information processor; and a fan for sending warm air of the hot aisle to the cold aisle.

Description

  The present invention relates to an information processing system, and more particularly to a technique that is effective when applied to cooling an information processing apparatus included in a data center or the like.

  In recent years, information processing apparatuses such as server apparatuses, router apparatuses, and storage apparatuses are rapidly increasing in speed, capacity, and density. In addition, it has become common to accommodate these information processing apparatuses in a computer room in a building called a data center.

  In the computer room of the data center, a rack that houses server devices, storage devices, router devices, and the like as information processing devices is arranged. Air conditioning is commonly used for cooling information processing devices. The rack is generally of a type that draws in cool air from the front and exhausts it from the rear, and generally has a configuration in which the racks are arranged in a horizontal row as rack rows that are aligned in direction. In the computer room, a plurality of such rack rows are arranged across the passage, and are arranged so that the intake surface and the intake surface, and the exhaust surface and the exhaust surface of the adjacent rack rows face each other. The passage between the intake surfaces is called cold aisle because cold air is supplied from the space under the double floor. In contrast, the passage between the exhaust surfaces is called hot aisle because the temperature rises due to exhaust from the rack.

  As disclosed in Non-Patent Document 1, conventionally, in order to cool the server in the data center by introducing the outside air, the return air from the outside air and the hot aisle is maintained so that the inlet temperature to the server is maintained. After the temperature of the air was adjusted in advance by mixing with warm air, the temperature-controlled air was circulated in the computer room and distributed to each cold aisle.

Cliff Saran, “Fresh Air Cooling Makes HP Datasuper Super-Efficient”, [online], February 17, 2010, Computer Weekly. com, [Search August 20, 2011], Internet <URL: http: // www. computerweekly. com / Articles / 2010/03/15/240341 / Fresh-air-cooling-makes-HP-datacentre-super-efficient. htm? printerfriendly = true>

  However, it is not easy to design the information processing system so that the inlet temperature to the server is maintained. For example, it is necessary to consider the variation in the air volume of the cold air distributed to each cold aisle that arises from the positional relationship with the outside air cooler that is the supply source of the cold air. In addition, for example, there is a group of cables in the space under the double floor of the computer room of the data center, and this prevents the cold air from being distributed to each cold aisle. To be complicated. Thus, it is not easy to design an information processing system, which is very expensive.

  An object of the present invention is to facilitate the design of an information processing system.

  Of the inventions disclosed in the present application, the outline of typical ones will be briefly described as follows.

  An information processing system according to the present invention cools an information processing device by blowing air from a cold aisle to a hot aisle, a rack installed at a boundary between the cold aisle and a hot aisle, an information processing device mounted on the rack, and A cooling fan and a fan for blowing hot aisle warm air to the cold aisle are provided.

  The effects obtained by typical ones of the inventions disclosed in the present application will be briefly described as follows.

  In the information processing system of the present invention, it is not necessary to distribute air whose temperature has been adjusted in advance to the inlet temperature to the information processing apparatus, and the information processing system can be easily designed. As a result, the design cost of the information processing system can be reduced.

It is a mimetic diagram from the side of an example of an information processing system of the present invention. It is a schematic diagram from the upper surface side of the Example of the information processing system of this invention. It is a schematic diagram of the cross section of the rack used for the Example of the information processing system of this invention. It is a schematic diagram of the cross section of the air blower used for the Example of the information processing system of this invention. It is a schematic diagram of the cross section of the blower outlet used for the Example of the information processing system of this invention. It is the figure which showed typically the example of a mode that the temperature of the cold aisle of the Example of the information processing system of this invention was controlled. It is a wet air diagram for demonstrating an Example. It is a figure which shows the example of the flow of operation | movement of the information processing system of this invention. It is a mimetic diagram from the side of an example of an information processing system of the present invention. It is a mimetic diagram from the side of an example of an information processing system of the present invention. It is a mimetic diagram from the side of an example of an information processing system of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted.

  1 and 2 show an information processing system 101 as an embodiment in which the information processing system of the present invention is applied to a data center. FIG. 1 is a diagram schematically showing the information processing system 101 from the side. The information processing system 101 includes a computer room 102, an outside air cooler 103, a control panel 104 of the outside air cooler 103, rack rows 105a to 108a installed on a double floor, a distribution board 109, and a double floor. It has an underfloor space 110, an exhaust duct 111, and an outlet 112. Each rack row includes at least one rack.

  The rack row 105a is at the boundary between the cold aisle 113a and the hot aisle 114a, the rack row 106a is at the boundary between the hot aisle 114a and the cold aisle 115a, the rack row 107a is between the cold aisle 115a and the hot aisle 116a, and the rack row 108a is It is installed between the hot aisle 116a and the cold aisle 117a. In this embodiment, the cold aisle and the hot aisle are separated by capping. By separation by capping, air conditioning control with higher accuracy becomes possible.

  FIG. 2 is a diagram schematically illustrating the information processing system 110 from the upper surface side. In the information processing system, rack rows 105b to 108b are arranged similarly to the rack rows 105a to 108a.

  The information processing system 101 includes at least one information processing apparatus. The information processing apparatus is mounted on racks that constitute the rack rows 105a to 108a and the rack rows 105b to 108b. The installed information processing apparatus includes a server apparatus, a router apparatus, and a storage apparatus. The rack on which the information processing apparatus is mounted is provided with a cooling fan that cools the information processing apparatus mounted by blowing air from the cold aisle toward the hot aisle. In this embodiment, each cooling fan is provided in each information processing apparatus. For example, the cooling fan is provided in an installed server device.

  The racks constituting the rack rows 105a to 108a and the rack rows 105b to 108b are provided with at least one blower 118 that contacts each cold aisle and blows hot aisle warm air to the cold aisle. Yes. Since the blower 118 blows warm air, it functions as a warm air fan.

  The outside air cooler 103 includes a blower fan 119 that sucks outside air and introduces the cold air into the space 110 under the double floor, and an exhaust fan 120 that exhausts warm air to the outside. When the temperature of the outside air is not sufficiently low, the outside air cooler 103 cools the outside air with the air conditioner 121 provided with a heat exchanger, and introduces it into the space 110 under the double floor. The outdoor air cooler 103 includes a thermometer and a hygrometer in order to measure the temperature and humidity of the cold air introduced into the space 110 under the double floor.

  The cold air introduced from the outside air cooler 103 into the space 110 under the double floor is introduced into each cold aisle through the outlet 112 serving as an inflow port. The cold air introduced into each cold aisle through the air outlet 112 to each cold aisle is used for cooling the information processing device mounted in each rack, and the air heated by each information processing device is used as each cooling fan. Is sent to each hot aisle.

  A part of the warm air of each hot aisle is returned to each cold aisle by the blower 118 and a part thereof is discharged to the exhaust duct 111 through the suction port 122 by the process described later. The air in the exhaust duct 111 is exhausted to the outside by the exhaust fan 120.

  FIG. 3 schematically shows a cross-sectional view of a rack 301 on which an information processing device used for the rack rows 105a to 108a and the rack rows 105b to 108b is mounted and provided with a blower 118. The rack 301 has a blower 118 mounted at the bottom, and at least one information processing device 302 such as a router device, a storage device, a blade server device, and a 1U server device is mounted on the rack frame 303 at the top. The rack 301 is installed so that the front door 304 side is on the cold aisle side and the rear door 305 side is on the hot aisle side.

  Each information processing apparatus mounted on the rack 301 is provided with a cooling fan. The cooling fan of each information processing apparatus sucks cold aisle air from the front door 304 that can be ventilated by applying a member such as a mesh panel of the rack 301 and introduces it into the information processing apparatus 302. A member such as a mesh panel is applied to exhaust air from the rear door 305 that can be ventilated. For example, heat generated by the CPU of the information processing apparatus 302 causes the hot aisle air to become warm.

  The front door 304 of the rack 301 is provided with a thermometer 306 and a hygrometer 308, and the temperature and humidity of the cold aisle air can be measured. The rear door 305 is provided with thermometers 306 and 307 and hygrometers 308 and 309. The thermometer 306 and the hygrometer 308 can measure the temperature and humidity of the exhaust from the rack 301. The hygrometer 309 can measure the temperature and humidity of hot air warm air as will be described later. The rear door 305 is provided with an anemometer 310 for detecting the air volume of the cooling fan of the information processing apparatus 302. Since the air blown by the cooling fan passes through the rear door 305, the air volume of the cooling fan can be obtained by measuring the wind speed with the anemometer 310. The thermometers 306 and 307, the hygrometers 308 and 309, and the anemometer 310 can obtain more detailed information on temperature, humidity, and air volume by arranging more closely and increasing the number of measurement points. .

  The blower 118 sucks hot aisle warm air from the rear door 305 of the rack 301, passes the lowermost part of the rack 301, and discharges it to the cold aisle. Further, the temperature and humidity of the warm air blown from the hot aisle by the blower 118 can be measured by the thermometer 307 and the hygrometer 309 installed at the lowest level of the rack 301.

  FIG. 4 schematically shows a cross-sectional view of the blower 118. The blower 118 includes a blower unit 401, a blower control unit 402, and an extension duct 403. The blower unit 401 includes a blower fan 404. The blower fan 404 operates under the control of the blower control unit 402 and blows hot aisle air toward the cold aisle. The air blowing control unit 402 controls the on / off of the air blowing fan 404 and the rotation speed. By controlling the number of revolutions of the blower fan 404, the amount of hot air sent to the cold aisle is controlled. The air blowing unit 401 is a duct, and the air blowing unit 401 and the extension duct 403 form a flow path from the hot aisle side to the cold aisle side. Since the blower 118 includes the extension duct 403, the warm air blown from the hot aisle side is blown forward of the rack 301 and the warm air is prevented from flowing directly into the front door 304 of the rack 301. High temperature failure of the device can be prevented. Further, the warm air blown from the hot aisle side is easily mixed with the cold air in the cold aisle by stirring.

  FIG. 5 schematically shows a configuration example of the outlet 112 in a cross-sectional view. The blowout port 112 includes a blowout control unit 501, an opening 502, and a sensor unit 503 in order to control the amount of cold air supplied to the cold aisle. Cold air flows from the sensor unit 503 side toward the opening 502 side.

  The blowing control unit 501 controls the inflow amount of cold air from the space 110 under the double floor to the cold aisle by changing the opening ratio of the opening 502. The outlet 112 is provided with an array of rotor blades 504 in the opening 502 in order to control the inflow amount of cold air. The blowing control unit 501 controls the direction of each rotary blade 504 to control the aperture ratio, and the amount of cold air flowing into the cold aisle is controlled. In addition, the blow control unit 501 controls the direction of each rotor blade 504 so that the cold air flows in the direction opposite to the direction in which the rack row is installed, so that the information processing apparatus mounted in the rack row Cold air can be prevented from directly flowing in, and dew condensation in the information processing device mounted on the rack can be prevented even when cold air near the dew point flows in.

  The sensor unit 503 includes sensors such as a flow meter, a thermometer, and a hygrometer, and can measure the flow rate, temperature, and humidity of the cold air supplied from the outlet 112 to the cold aisle. The flow rate, temperature, and humidity of the cold air measured by the sensor unit 503 are output to the outside via the blowing control unit 501.

  One of the racks is provided with a management server device 123. The management server device 123 is also an information processing device, and includes a cooling fan like other information processing devices. The management server device 123 includes a control panel 104 of the outside air cooler 103, a blower control unit 402 of each blower 118, a blowout control unit 501 of each blowout port 112, each rack, and information processing mounted in each rack. It is connected to the apparatus via a wiring 124 indicated by a broken line. Note that the wiring 124 is compared with an information communication cable group 125 such as an Ethernet cable and a power cable group 126 connected between each rack and the distribution board 109 for communication between racks and the outside. The provision of the wiring 124 has almost no influence on the distribution of the cold air in the space 110 under the double floor. On the other hand, the information communication cable group 125 and the power cable group 126 generate vortices, for example, so that they become a resistance component against the flow of cold air supplied from the outside air cooler 103 to each cold aisle, and the cold air is supplied to each cold aisle. Variations in distribution can occur.

  The management server device 123 transmits a control signal to the control panel 104 of the outside air cooler 103 to control the blower fan 119 and transmits a control signal to the blower control unit 402 of each blower 118 to thereby control each blower fan 404. Control and control of the aperture ratio of each outlet 112 can be performed by transmitting a control signal to the outlet controller 501 of each outlet 112. In addition, the management server device 123 uses the blower 118 from the hot aisle from the thermometer 307 and the hygrometer 309 and the information on the temperature and humidity of the cold air introduced into the space 110 under the double floor from the outside air cooler 103. Information on temperature and humidity of warm air to be blown, information on flow rate, temperature and humidity of cold air supplied from each outlet 112 to the cold aisle via the outlet control unit 501 of each outlet 112, and mounted on each rack The information regarding the air volume of the cooling fan of the information processing apparatus and the temperature and humidity information of each cold aisle are obtained from the thermometer 306 and the hygrometer 308 provided in the front door 304 of each rack 301, respectively. be able to.

  Here, the air volume of the cooling fan of each information processing apparatus, that is, the air volume of warm air exhausted to the hot aisle by each information processing apparatus is sensed by the anemometer 310 as described above, or the specifications of each information processing apparatus and each It can be obtained by a method such as estimating the number of rotations of the cooling fan of each information processing device from the work load amount or the like being processed by the information processing device and calculating the amount of air discharged from each information processing device.

  FIG. 6 is a diagram schematically illustrating an example in which the temperature of the cold aisle is controlled by the management server device 123 of the information processing system 101 according to the present embodiment. In the example shown in FIG. 6, the management server device 123 assumes that the relative humidity of the cold air flowing into each cold aisle from each air outlet 112 through the space 110 under the double floor is 100%, by the blower 118. By controlling the temperature of each cold aisle to be higher than a predetermined lower limit (reference temperature_L) by blowing warm air, control is performed so that air sufficiently separated from the dew point is introduced into the information processing apparatus of each rack 301. To do.

  The predetermined lower limit (reference temperature_L) may be a temperature at which the relative humidity becomes 90% when the relative humidity of the cold air flowing into the cold aisle is assumed to be 100%, for example. Thereby, even if the humidity of the cold air flowing into the cold aisle is 100%, the relative humidity of the cold aisle is controlled to be 90% or less, so that it is possible to prevent a failure due to condensation. Alternatively, the predetermined lower limit (reference temperature_L) can be set to 21 ° C., for example, from the specifications of each information processing apparatus. This is because the outside air cooling is generally used in an area where the outside air temperature is low, for example, the outside air temperature is about 5 ° C., so that a failure due to condensation is sufficiently prevented.

  Moreover, the upper limit (reference temperature_U) of the temperature of the air introduced into each information processing device is determined, for example, from the specification of each information processing device, for example, the upper limit temperature of intake air (for example, 25 ° C.), with a margin of, for example, 24 ° C. I can decide.

  The management server device 123 acquires the temperature of the cold air flowing into each cold aisle from each air outlet 112 through the space 110 under the double floor from the thermometer of the outside air cooler 103 or the thermometer of the air outlet 112. In addition, the management server device 123 acquires the temperature CT of each cold aisle from the thermometer 306 of the front door 304 of each rack.

  The management server device 123 is configured such that the sum of the airflow flowing into each cold aisle from each outlet 112 and the airflow flowing into each cold aisle by the blower 118 is the cooling fan of the information processing device in the rack row in contact with each cold aisle. Control to balance with air volume. In the case of the control shown in FIG. 6, when the temperature CT of the cold aisle exceeds the reference temperature _U, the air volume flowing into the cold aisle from the outlet 112 is increased and the air volume of the blower 118 is decreased. When the cold aisle temperature CT falls below the reference temperature _L, the air volume of the blower 118 is increased by reducing the air volume of the cool air flowing into the cold aisle from the outlet 112. Control of the amount of cool air flowing into the cold aisle from the air outlet 112 can be performed by controlling the blower fan 119 of the outside air cooler 103 or controlling the opening ratio of the air outlet 112. Although FIG. 6 shows an example of control for one cold aisle, the management server device 123 performs the above control for each cold aisle.

  As a control method, in addition to the method described above, a method of performing PID control by setting a reference temperature as a target value between the reference temperature_L and the reference temperature_U can be applied. FIG. 6 shows an example of the reference temperature by a one-dot chain line. In addition, the management server device 123 acquires information on the temperature and humidity of the cold air supplied to the cold aisle and the temperature and humidity of the warm air blown by the blower 118, and the inflow of cold air from the outlet 112 to the cold aisle By reflecting in the control of the amount and the control of the blower fan 404, more accurate control can be realized.

  As described above, cold air such as outside air can be guided to the outlet 112 of each cold aisle, and the temperature can be adjusted by each cold aisle. This allows cooler air, such as 5 ° C., to be directed to each cold aisle outlet 112, rather than directing air that has been pre-conditioned to, for example, 24 ° C. to each cold aisle outlet 112, and thus Air required for cooling each information processing apparatus can be supplied with less air flow. Even if there is a variation in the supply of cold air to the cold aisle, the variation is absorbed by the blowing of warm air from the hot aisle to each cold aisle. Therefore, when designing the information processing system 101, the design for distributing cold air to each cold aisle becomes easy, and the design cost can be reduced.

  FIG. 7 shows a wet air diagram for explaining the present embodiment. The temperature of the cold air flowing into the cold aisle is measured, the relative humidity of the air flowing into the cold aisle is assumed to be 100%, and the assumption that the relative humidity decreases due to the warm air from the blower 118 is as shown by arrow A in FIG. Can show. Note that the reason why the absolute humidity can be shown without considering the change of the absolute humidity as indicated by the arrow A is that the absolute humidity changes gently, and in the description of this embodiment, the change of the absolute humidity can be ignored. It is.

  In this embodiment, the relative humidity of the cold air flowing into the cold aisle is assumed to be 100%. However, more accurate control is performed using the measurement results of the hygrometer of the outside air cooler 103 and the hygrometer of the outlet 112. It is also possible. Further, by acquiring the humidity information of each cold aisle from the hygrometer 308 of the front door 304 of each rack, it is possible to control not only the temperature but also the humidity of the air introduced into the information processing apparatus. By obtaining the measurement result of the hygrometer 309 of the rear door 305, the accuracy can be further increased. Further, as described later in the fourth embodiment, a humidifier is introduced into each cold aisle, and the humidifier is controlled by the management server device 123, whereby the degree of freedom in controlling the humidity of each cold aisle can be increased. In addition, it is easy to adjust the humidity of each cold aisle in accordance with the specifications of the information processing devices mounted on the racks in each rack row.

  Hereinafter, an example of a series of controls executed by the management server device 123 will be described. Note that, as an initial state, the outdoor air cooler 103 and the information processing devices mounted in each rack row are all stopped, the cold aisle outlet 112 is closed, and the temperature difference between the cold aisle and the hot aisle. Is a temperature at which there is no problem in operating the information processing apparatus, for example, 23 ° C. Furthermore, in order to make it easy to understand, the outside air temperature is assumed to be sufficiently low (about 5 ° C.) as in winter, for example.

  First, the management server device 123 and the blower 118 provided in the rack on which the management server device 123 is mounted are turned on to be in an operating state, and the information processing system 101 mounted on the management server device 123 is controlled. Run the control program. At this time, the management server apparatus 123 is configured so that the air volume A of the cooling fan provided in the management server apparatus 123 itself balances the air volume B of the blower 118 provided in the rack on which the management server apparatus is mounted. The air volume A is calculated from the anemometer 310 or the like, and the blower 118 provided in the rack on which the management server device 123 is mounted is operated based on the calculated air volume A.

  Next, the management server device 123 transmits a control signal for starting the outside air cooler 103 to the control panel 104 to start the operation of the outside air cooler 103. At this time, the blower fan 119 of the outside air cooler 103 is operated from a sufficiently low speed state, and the cold air is caused to flow into the space 110 under the double floor. The exhaust fan 120 also starts operating according to the operating state of the blower fan 119. In parallel, the information processing apparatus to be operated is turned on to operate the information processing apparatus in an idle state.

  The management server device 123 acquires the air volume information from the anemometer 310 installed on the hot aisle side of each rack row, identifies the information processing apparatus that is operating and its mounting position, and determines the rack corresponding to the mounting position. The operation of the blower 118 is started. At this time, the air volume information is transmitted from the management server apparatus 123 to the corresponding blower 118 so as to be balanced with the air volume of the cooling fan of the information processing apparatus in operation, similarly to when the management server apparatus 123 is started. The corresponding blower 118 starts air blowing from the hot aisle to the cold aisle according to the received information.

  Subsequently, the management server device 123 gradually increases the opening rate of the air outlet 112 on the cold aisle floor surface corresponding to the mounting position of the information processing device in operation from the closed state, and from the space 110 under the floor of the double floor. Introduce cold air into the cold aisle. The management server device 123 acquires the amount of cool air blown from the outlet 112, and the amount of air supplied to the cold aisle balances the amount of air exhausted to the hot aisle by the cooling fan of the operating information processing apparatus. As described above, the blower amount of each corresponding blower 118 is calculated, and information on the blower amount is transmitted to each blower 118. The air blow control unit 402 of each corresponding blower 118 receives the air flow amount information from the management server device 123, and controls the blower fan 404 of the air blow unit 401 according to the received air flow amount. Then, the management server device 123 monitors the temperature information of each cold aisle, and controls the opening ratio of each blowout port 112 and the air flow rate of each blower 118 so that the temperature of each cold aisle does not deviate from the set range. Enter steady state.

  When entering a steady state, jobs to be processed are sequentially submitted to each information processing apparatus that is operating. At this time, for example, when the amount of air supplied to the cold aisle is insufficient, control for increasing the opening ratio of the outlet 112 and control for increasing the amount of air blown from the blower 118 are performed. When the opening ratio of the air outlet 112 is the maximum and the inflow of cold air is insufficient, a command is sent from the management server device 123 to the control panel 104 to increase the rotational speed of the blower fan 119 of the outside air cooler 103. . As a result, the inflow of cold air from the outlet 112 of each cold aisle increases, but the management server device 123 reduces the opening ratio of each outlet 112 so that the cold aisle environment is within the constraint condition range. Control is performed.

  As described above, the management server device 123 monitors the airflow of the cooling fan of the information processing device and the temperature of the cold aisle, and the airflow from the hot aisle to the cold aisle by the blower 118 and the cool air from the outlet 112. The temperature of the cold aisle is realized by controlling the flow rate of the air.

  FIG. 8 shows an example of a flowchart of control by the management server device 123 of the information processing system 101. In step 801, cold aisle temperature and humidity data are acquired, in step 802, air flow data of the cooling fan of the information processing apparatus is acquired, in step 803, the inflow of cold air and warm air into the cold aisle is calculated, In 804, the amount of cold air and warm air flowing into the cold aisle is controlled. Thus, the cold aisle temperature and humidity environment can be maintained.

  As described above, the information processing system according to the present embodiment can supply air necessary for cooling each information processing apparatus with a smaller flow of cooler air than when the temperature-adjusted air is led to the outlet of each cold aisle. . Even if there is a variation in the supply of cold air to the cold aisle, the variation is absorbed by the blowing of warm air from the hot aisle to each cold aisle. Therefore, when designing the information processing system, the design for distributing cold air to each cold aisle becomes easy, and the design cost can be reduced.

  In the second embodiment, a modification of the first embodiment will be described. Example 1 demonstrated the case where the cold air from an outside air cooler was supplied to each cold aisle via the space under a double floor. On the other hand, in the second embodiment, a case will be described in which the cold air from the outside air cooler is supplied to each cold aisle via the triple ceiling space of the computer room.

  FIG. 9 is a diagram schematically illustrating the information processing system 901 according to the second embodiment of the present invention from the side surface side. In the information processing system 901, the cold air from the outside air cooler 902 is supplied to each cold aisle through the outlet 112 through the triple ceiling space 904 of the computer room 903. The specific gravity of air varies depending on the temperature. The lower the temperature, the greater the specific gravity. Accordingly, by supplying each cold aisle via the triple ceiling space 904, the cool air blown from the outside air cooler 902 can easily enter the cold aisle.

  In the information processing system 901, the blower 118 is installed at the top of each rack in the rack rows 905a to 908a. Since air with high temperature rises because of its relatively low specific gravity, by installing the blower 118 at the top of each rack, the cool air descending from the triple ceiling space 903 and the warm air from the blower 118 It becomes easy to mix by stirring. Hot aisle exhaust is discharged from the suction port 112 via the exhaust duct 909 to the outside through the triple ceiling space 910. Since other configurations are the same as those in FIG. 1, detailed description thereof is omitted.

  As described above, the information processing system 901 according to the present embodiment cools each information processing apparatus with less flow of cooler air than when the temperature-adjusted air is led to the outlet of each cold aisle as in the first embodiment. The necessary air can be supplied. Even if there is a variation in the supply of cold air to the cold aisle, the variation is absorbed by the blowing of warm air from the hot aisle to each cold aisle. Therefore, when designing the information processing system, the design for distributing cold air to each cold aisle becomes easy, and the design cost can be reduced.

  In the third embodiment, a modification of the first embodiment will be described. In the first embodiment, the case where the outside air and the warm air from the hot aisle are stirred in the cold aisle has been described. In the third embodiment, a case where warm air from outside air and hot aisle is stirred in a space below the double floor and the temperature-controlled air is blown to the cold aisle will be described.

  FIG. 10 is a diagram schematically illustrating an information processing system 1001 according to the third embodiment of the present invention from the side surface side. In the information processing system 1001, the cool air from the outside air cooler 103 and the warm air from each hot aisle are stirred in the space 110 under the double floor, and the stirred air is blown to each cold aisle. A suction port 1002 is installed on the floor surface of each hot aisle so that warm air of each hot aisle can be introduced into the space 110 under the floor of the double floor. At that time, in order to prevent the cold air blown from the outdoor air cooler 103 to the space 110 under the double floor and the warm air of each hot aisle from being directly mixed, by the isile capping in the space 110 under the double floor, A hot air introduction section 1003 into which hot aisle warm air is introduced, and a mixing chamber 1004 for mixing the warm air introduced from the hot aisle and the cold air blown into the space 110 under the double floor are formed. Further, a blower 118 is installed at the boundary between the warm air introduction unit 1003 and the mixing chamber 1004 in order to blow warm air from the warm air introduction unit 1003 to the mixing chamber 1004. The mixing chamber 1004 is provided with a cold air flow inlet 1005 whose opening ratio is variable in order to control the inflow amount of the cold air from the outside air conditioner 103. The cold air inlet 1005 is connected to the management server device 123, and the opening ratio of the cold air inlet 1005 is controlled by the management server device 123. Similarly to the air outlet 112, the cold air inlet 1005 is provided with sensors such as a flow meter, a thermometer, and a hygrometer, and can measure the flow rate, temperature, and humidity of the cold air supplied to the mixing chamber 1004. . The measurement result is collected in the management server device 123.

  The management server device 123 maintains the balance between the air volume supplied to each cold aisle and the air volume exhausted from each rack row by controlling the opening ratio of the cold air flow inlet 1005 and the blower 118 as in the first embodiment. In addition, the temperature of each cold aisle, that is, the temperature of the air supplied to the rack rows 1006a to 1009a is set within the set temperature range. Since other configurations are the same as those of the first embodiment, detailed description thereof is omitted.

  As described above, the information processing system 1001 according to the present embodiment cools each information processing apparatus with less flow of cooler air than when the temperature-adjusted air is led to the outlet of each cold aisle as in the first embodiment. The necessary air can be supplied. Even if there is a variation in the supply of cold air to the cold aisle, the variation is absorbed by the blowing of warm air from the hot aisle to each cold aisle. Therefore, when designing the information processing system, the design for distributing cold air to each cold aisle becomes easy, and the design cost can be reduced.

  In the fourth embodiment, a humidifier is further introduced into the information processing system 101 of the first embodiment.

  FIG. 11 is a diagram schematically illustrating the information processing system 1101 of the present embodiment from the side surface side. In the information processing system 1101, the introduction of the humidifier 1102 is introduced into the cold aisle 113 a, and the humidifier 1102 is connected to the management server device 123 via the wiring 124. In FIG. 11, the humidifier 1102 is shown only in the cold aisle 113a, but the humidifier 1102 can be similarly installed in the cold aisle 115a and the cold aisle 117a, for example, between the outlets 112. . By installing the humidifier 1102, the degree of freedom in controlling the humidity of each cold aisle can be increased. In addition, it is easy to adjust the humidity of the cold aisle according to the specifications of the information processing apparatus mounted on each rack.

  As described above, the invention made by the present inventor has been specifically described based on the embodiment, but the present invention is not limited to the embodiment, and various modifications can be made without departing from the scope of the invention. Other embodiments other than this embodiment can be used. Accordingly, all modifications within the scope of the present invention are included in the claims.

  DESCRIPTION OF SYMBOLS 101 ... Information processing system, 102 ... Computer room, 103 ... Outside air cooler, 104 ... Control panel, 105a-108a ... Rack row, 105b-108b ... Rack row, 109 ... Distribution board, 110 ... Double floor under floor Space, 111 ... Exhaust duct, 112 ... Outlet, 113a ... Cold aisle, 113b ... Cold aisle, 114a ... Hot aisle, 114b ... Hot aisle, 115a ... Cold aisle, 115b ... Cold aisle, 116a ... Hot aisle, 116b ... Hot Aisle, 117a ... Cold aisle, 117b ... Cold aisle, 118 ... Blower, 119 ... Blower fan, 120 ... Exhaust fan, 121 ... Air conditioner, 122 ... Suction port, 123 ... Management server device, 124 ... Wiring, 125 ... Information communication Cable group 126 ... Power cable group 301 ... 302 ... Information processing device 303 ... Rack frame 304 ... Front door 305 ... Rear door 306 ... Thermometer 307 ... Thermometer 308 ... Hygrometer 309 ... Hygrometer 401 ... Air blower 402 DESCRIPTION OF SYMBOLS ... Air blow control part, 403 ... Extension duct, 404 ... Air blow fan, 501 ... Air blow control part, 502 ... Opening part, 503 ... Sensor part, 504 ... Rotor blade.

Claims (15)

At least one rack in contact with the cold aisle;
At least one information processing device mounted on the at least one rack;
At least one first fan for cooling the at least one information processing device by blowing air from the cold aisle to the hot aisle;
And at least one second fan for blowing warm air of the hot aisle to the cold aisle,
An information processing system, wherein the amount of cold air flowing into the cold aisle and the at least one second fan are controlled in accordance with an air flow rate of the at least one first fan and a temperature of the cold aisle. The information processing system according to claim 1,
Comprising the cold air inlet to the cold aisle,
An information processing system, wherein the inflow amount is controlled by changing an opening ratio of the inlet. The information processing system according to claim 1,
An information processing system comprising a third fan for blowing the cold air to the cold aisle. The information processing system according to claim 3,
An information processing system, wherein the inflow amount is controlled by controlling the third fan. The information processing system according to claim 1,
The at least one information processing device includes a server device,
The information processing system, wherein the at least one first fan includes a cooling fan provided in the server device. The information processing system according to claim 1,
The information processing system, wherein the cold air is outside air. The information processing system according to claim 1,
The information processing system, wherein the at least one second fan is provided in the at least one rack. The information processing system according to claim 1,
The information processing system, wherein the cold air flows into the cold aisle from a ceiling. The information processing system according to claim 1,
The information processing system, wherein the cold air flows into the cold aisle from under the floor.   A data center comprising the information processing system according to claim 1. A rack installed at the boundary between cold aisle and hot aisle;
An information processing device mounted on the rack;
A cooling fan that cools the information processing apparatus by blowing air from the cold aisle to the hot aisle;
An information processing system comprising: a hot air fan that blows warm air of the hot aisle to the cold aisle. The information processing system according to claim 11,
The information processing system, wherein the hot air fan is provided in the rack. The information processing system according to claim 11,
An information processing system that controls the amount of cool air flowing into the cold aisle and the hot air fan in accordance with the amount of air blown from the cooling fan and the temperature and humidity of the cold aisle. The information processing system according to claim 11,
An information processing system, wherein the amount of cool air flowing into the cold aisle and the hot air fan are controlled in accordance with an air flow rate of the cooling fan and a temperature of the cold aisle. A rack installed on the double floor where cold air is introduced into the space under the floor and at the boundary between the cold aisle and the hot aisle;
An information processing device mounted on the rack;
A first fan that cools the information processing device by blowing air from the cold aisle to the hot aisle;
A warm air introduction section for introducing warm air of the hot aisle, which is provided in a space under the double floor;
A mixing chamber that is provided in a space under the double floor, mixes the cold air and the warm air from the warm air introduction section, and supplies the mixed air to the cold aisle;
A second fan provided between the warm air introduction part and the mixing chamber;
An information processing system, wherein the amount of cool air flowing into the mixing chamber and the second fan are controlled in accordance with an air flow rate of the first fan and a temperature of the cold aisle.