JP2012048549A - Data center - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data center whose credibility can be entirely maintained even if a rack is rented out to a company.SOLUTION: In a data center, panels 21 are arranged on end sides in a horizontal direction of rack rows 15 whose back surfaces are opposed to each other at intervals, partitions 23 extending to a ceiling 20 are formed at front edge upper parts of both rack rows 15, a hot zone 24 is defined in an air-conditioning chamber 13, an exhaust port 26 is formed at the ceiling 20 in the hot zone 24, an outlet 27 is formed at the ceiling 20 in front of both rack rows 15 and outside the hot zone 24, and air-conditioned air blown from the outlet 27 is introduced from a front surface through a back surface of the rack row 15 into the hot zone 24. The data center includes an exhaust duct 31 for introducing air collected from the exhaust port 26 into an air-conditioning machine, and multiple hot zones 24 are defined with respect to one exhaust duct 31.

Description

  The present invention relates to a data center that efficiently removes heat generated in an electronic device such as a server housed in a rack.

  In recent years, the data center is a field that has attracted a great deal of attention, and research and development of energy-saving technology is also active.

  As a conventional data center, as shown in Patent Documents 1 and 2, a rack row in which a plurality of racks that house multiple stages of electronic devices such as servers on the floor surface of the air conditioning room are arranged in the left-right direction. In addition, there is a data center that includes an air conditioner that air-conditions the air-conditioned room in order to remove heat generated by the electronic equipment housed in the rack.

  In the data centers of Patent Documents 1 and 2, the rear surfaces of the rack rows are arranged on the floor surface in the air-conditioning room facing each other at an interval, and the rack row is placed on the end side in the left-right direction of the opposed rack rows. A panel extending from the lower edge to the ceiling of the air conditioning room is provided, and a partition extending to the ceiling is provided above the front edge of both rack rows to partition the hot zone in the air conditioning room. In addition to forming an exhaust port for exhausting heat, air outlets that blow the conditioned air from the air conditioners are formed outside the hot zone and in front of both rack rows, and the conditioned air blown from the outlets is racked. It is introduced into the hot zone from the front to the back of the row.

  In the data centers of Patent Documents 1 and 2, since all the heat generated in the electronic device is concentrated in the hot zone, it is possible to efficiently operate the air conditioner and reduce the energy consumption in the air conditioner. Because the heat in the hot zone can be recovered from the exhaust port by the principle of natural convection and the conditioned air from the air conditioner can be supplied from the outlet to the rack row by the principle of natural convection, further energy consumption in the air conditioner Reduction is possible, which is very advantageous from the viewpoint of energy saving.

JP 2010-49330 A JP 2010-72697 A

  Currently, while considering a business model of lending a part of a plurality of racks in a data center, that is, a plurality of racks, a data center such as Patent Documents 1 and 2, for example, racks to a certain company When lending four sections, security of electronic devices such as servers installed in adjacent racks becomes a problem. This could lead to a credit problem for the entire data center.

  Therefore, an object of the present invention is to provide a data center capable of solving the above-mentioned problems and maintaining the trust of the entire data center even if a rack is lent to a certain company.

  The present invention was devised to achieve the above-described object, and at least one air conditioning room and one or more racks that house multiple electronic devices such as servers on the floor surface of the air conditioning room are arranged in the left-right direction. A rack row formed, and an air conditioner for air-conditioning the air-conditioned room to remove heat generated by the electronic equipment accommodated in the rack, with the back surfaces of the rack row facing each other with a gap therebetween A panel arranged on the floor surface of the air conditioning room and extending from the lower edge of the rack row to the ceiling of the air conditioning room is provided on the left and right ends of the facing rack row, and the front edges of both rack rows A partition extending to the ceiling is provided at the top, a hot zone is partitioned in the air-conditioned room, an exhaust port for exhausting the heat of the hot zone is formed in the ceiling in the hot zone, and outside the hot zone. Air outlets for blowing conditioned air from the air conditioners are respectively formed in the ceilings in front of both rack rows, and the conditioned air blown from the air outlets is introduced from the front to the back of the rack rows into the hot zone. The data center is provided with an exhaust duct that guides air collected from the exhaust port to the air conditioner, and a plurality of the hot zones are defined for one exhaust duct.

  The exhaust duct may be formed with a plurality of exhaust ports, and the unused exhaust duct may be covered.

  The panel may be provided with a door for entering and exiting the hot zone.

  In the ceiling in front of both rack rows of each hot zone, substantially one said air outlet is provided for each predetermined number of racks so as to correspond to each hot zone, and each of the air outlets is provided. A fan for blowing out the conditioned air is provided in the air-conditioned room, and a temperature detecting means for detecting the temperature in the hot zone is provided in each hot zone, corresponding to the air outlet detected by the temperature detecting means. You may provide the rotation speed control apparatus which controls the rotation speed of the said fan so that the temperature in each said hot zone may be kept in a predetermined temperature range or predetermined temperature.

  A plurality of the exhaust ducts are provided in parallel, and a plurality of the hot zones are defined for each of the plurality of the exhaust ducts, and the front surface of the rack row constituting each of the hot zones corresponding to the adjacent exhaust ducts The air outlets provided on the ceiling of the air conditioning chamber between the hot zones corresponding to the adjacent exhaust ducts when the hot zones are partitioned by aligning the arrangement direction of the rack rows so as to face each other Is a common outlet that is substantially one outlet for each of a predetermined number of racks in the arrangement direction of the rack rows arranged so that the front faces are opposed to each other. The temperature detecting means detects the rotation speed of the fan related to the common outlet provided between the hot zones corresponding to the matching exhaust duct. The temperature of the higher of the temperature in the plurality of the hot zone corresponding to the common outlet being, it may be arranged for controlling so as to maintain a predetermined temperature range or predetermined temperature.

  As the air conditioner, a fanless air conditioner having no fan may be used.

  According to the present invention, even if a rack is lent to a certain company, it is possible to provide a data center capable of maintaining the trust of the entire data center.

It is a top view of the data center which concerns on one embodiment of this invention. It is a front view of the data center of FIG. FIG. 2 is a perspective view of the data center of FIG. 1 as seen through a ceiling of an air conditioning room. It is a side view of the data center of FIG. It is sectional drawing of the hot zone of the data center of FIG. It is a figure explaining the formation procedure of each hot zone in the data center of FIG. It is a figure explaining the input-output structure of the rotation speed control apparatus in the data center of FIG. In this invention, it is a flowchart which shows the control flow of a temperature sensor non-contrast control process. It is a top view of the data center which concerns on other embodiment of this invention. It is a figure explaining the input-output structure of the rotation speed control apparatus in the data center of FIG. 10 is a flowchart showing a control flow of fan control processing in the data center of FIG. 9. In this invention, it is a flowchart which shows the control flow of a temperature sensor contrast control process.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a plan view of a data center according to the present embodiment, FIG. 2 is a front view thereof, FIG. 3 is a perspective view of a ceiling of an air conditioning room, FIG. 4 is a side view, and FIG. It is sectional drawing.

  As shown in FIGS. 1 to 5, the data center 10 includes a box-shaped air conditioning chamber 13 formed of at least a ceiling 20, a floor surface 14, and four side walls (not shown), and an electronic device 11 such as a server. Air conditioner that air-conditions the inside of the air-conditioning chamber 13 to remove heat generated in the rack row 15 in which one or more racks 12 that are housed in multiple stages are arranged in the left-right direction and the electronic device 11 that is housed in the rack 12 Machine (not shown).

  In the rack 12, electronic devices 11 that are equipment devices of information communication technology such as servers, CPUs, network devices, and storage devices are accommodated in multiple stages.

  In the data center 10, one or more racks 12 are arranged in the left-right direction on the floor surface 14 of the air-conditioning room 13 and connected to each other to form a rack row 15 (in this specification, one rack 12 is provided). In some cases, the rack rows 15 are also referred to as “rack rows” for the sake of convenience, and the rear surfaces R of the rack rows 15 are arranged facing each other with an interval (for example, an interval that allows one worker to pass). In this manner, the work rows 16 are formed between the rack rows 15 by arranging the rack rows 15 at intervals.

  These rack rows 15 are arranged on the floor surface 14 via a seismic isolation device 17. In the present embodiment, the seismic isolation device 17 is provided with the seismic isolation table 19 on the gantry 18 via a bearing, but is not limited thereto. 1 and 3, the seismic isolation device 17 is omitted.

  Panels 21 extending from the lower edge of the rack row 15 to the ceiling 20 are provided on the left and right sides of the rack row 15. More specifically, the panel 21 is connected to both ends of the rack row 15 with screws or the like, and has a structure in which both the rack rows 15 are sandwiched. At least one of the panels 21 provided on the left and right sides of the rack row 15 is provided with a door 22 for entering and exiting the work passage 16 (that is, a hot zone 24 described later). The door 22 can be locked. The panel 21 is provided on the seismic isolation device 17.

  A partition 23 extending to the ceiling 20 is provided on the upper front edge of each rack row 15. The upper ends of the partition 23 and the panel 21 are provided so as to be movable with respect to the ceiling 20.

  As shown in FIG. 5, a ceiling seal member 25 for sealing the hot zone 24 and the air conditioning chamber 13 is provided at the upper ends of the panel 21 and the partition 23. In the present embodiment, a rubber sheet is used as the ceiling seal member 25, and the rubber sheet is fixed to the upper end of the partition 23 on the hot zone 24 side with a bolt or the like so that the upper end portion is curved to the hot zone 24 side.

  As a result, a hot zone 24 partitioned from the air conditioning chamber 13 by the rack rows 15, the partitions 23, and the panel 21 is partitioned.

  In the present embodiment, three hot zones 24 are partitioned in the air conditioning chamber 13. Here, the number of racks 12 constituting the rack row 15 in the three hot zones 24 is two, three, and one from the top to the bottom in FIG. 1, and the four hot zones 24 in FIG. The hot zone 24 below is composed of six racks, and the lower hot zone 24 is composed of two racks 12, but the number of racks 12 constituting each hot zone 24 is limited to this. Is not to be done. Each hot zone 24 is partitioned in the air conditioning chamber 13 so that the two rack rows 15 constituting each hot zone 24 are arranged in a straight line in the arrangement direction of the rack rows 15.

  As shown in FIG. 6, these three hot zones 24 are composed of 16 racks 12 (the rack row 15 is composed of 8 racks 12). The third and seventh racks 12 are removed from the rack row 15 and panels 21 are provided at the ends of the rack rows 15 on both sides of the portion from which the rack 12 is removed. That is, the three hot zones 24 are formed by dividing one hot zone 24a.

  In the hot zone 24a before division, an exhaust port 26 for exhausting heat in the hot zone 24 is provided on the ceiling 20 in the hot zone 24a for each rack 12 in the rack row 15 (in the case of both rack rows 15). , One for each of the two racks 12 arranged opposite to each other, and aligned in the arrangement direction of the racks 12 in the rack row 15. Here, “substantially one” in the present application means, for example, that there are further exhaust ports in the vicinity of the exhaust port 26, and even if there are two exhaust ports in appearance, each of the exhaust ports When considering the function (action), if the same function (action) is exhibited, it is understood that it is substantially one exhaust port (hereinafter, the same applies to the case of the “air outlet”). ). Each exhaust port 26 is connected to an exhaust duct 31, and the exhaust duct 31 guides air collected from the exhaust port 26 to a suction port of the air conditioner.

  When the hot zone 24 a is divided, three hot zones 24 are divided for one exhaust duct 31. At this time, since the exhaust port 26 in the portion from which the rack 12 is removed is disposed outside the hot zone 24, the exhaust port 26 in the portion from which the rack 12 is removed is covered with a lid 36. In the present embodiment, as for the exhaust ports 26 in each hot zone 24, only one exhaust port 26 is left for each hot zone 24, and the remaining exhaust ports 26 are covered with a lid 36. . Note that the number of the exhaust ports 26 without the lid 36 may be set as appropriate in consideration of the number of racks 12 constituting the hot zone 24 and the like.

  Further, in the hot zone 24a before the division, a predetermined number of racks are provided on the ceiling 20 outside the hot zone 24a and in front of both rack rows 15 to blow out the conditioned air (cold air) from the air conditioners. For each of the twelve, substantially one is provided, and each of the air outlets 27 is provided with a fan 33 for blowing conditioned air into the air conditioned room 13. In the present embodiment, one air outlet 27 is formed for each of the two racks 12 in the rack row 15, and four air outlets 27 are provided on the ceiling 20 in front of both rack rows 15 so as to sandwich the hot zone 24a. And aligned in the arrangement direction of the racks 12 in the rack row 15. Each outlet 27 is connected to the conditioned air outlet of the air conditioner via the outlet duct 32. When the hot zone 24a is divided, each outlet 27 (fan 33) corresponds to one of the divided hot zones 24.

  In addition, although the case where the one outlet 27 is provided for every two racks 12 is demonstrated here, the space | interval of the outlet 27, ie, how many racks 12, one outlet 27 is provided, is explained. What is necessary is just to determine suitably according to the capacity | capacitance of the fan 33 provided in the exit 27. FIG. For example, if the fan 33 can supply a sufficient amount of conditioned air with which three racks 12 can obtain a sufficient cooling effect, one outlet 27 may be formed for each of the three racks 12.

  Although not shown, each fan 33 is connected to a power INV (inverter) panel with variable output frequency. Each fan 33 rotates at a rotational speed corresponding to the output frequency of the power INV board.

  The air conditioner is provided in a different space from the air conditioning room 13 in which the rack 12 is disposed, for example, in another room or passage of a building in which the data center 10 is provided, or outdoors. Thereby, piping, such as a refrigerant | coolant, is no longer connected to the rack 12 (rack row | line | column 15), and an air conditioner and the rack 12 (rack row | line | column 15) are completely cut away. In the present embodiment, a fanless air conditioner having only a cooling coil (DC; Dry Coil) that cools the air from the exhaust duct 31 and blows out the conditioned air is used as the air conditioner. I made it.

  In the data center 10, the air in each hot zone 24 is collected at the exhaust port 26, passes through the exhaust duct 31, and is collected by the air conditioner. At this time, the air in the hot zone 24 is heated by the electronic device 11 and naturally rises, so that it can be easily collected by the air conditioner.

  The conditioned air cooled by passing through the cooling coil of the air conditioner is sucked by the fan 33 of the air outlet 27 and blown out from the air outlet 27 into the air conditioning chamber 13 through the air outlet duct 32. The temperature of the conditioned air in the air conditioned room 13 is about 23 ° C., for example.

  The conditioned air blown into the air conditioning chamber 13 is introduced from the front surface F of the rack row 15, removes (absorbs) heat generated by the electronic devices 11 in the rack 12, and then enters a hot zone from the rear surface R of the rack row 15. 24.

  In the data center 10 according to the present embodiment, a temperature sensor 34 is provided in each hot zone 24 and serves as a temperature detecting means for detecting the temperature in the hot zone 24, and the temperature detected by each temperature sensor 34. A rotation speed control device 35 that individually controls the rotation speed of the fan 33 corresponding to the hot zone 24 provided with each temperature sensor 34 is further provided so as to maintain the predetermined temperature.

  2 to 5, the temperature sensor 34 and the rotation speed control device 35 are omitted for simplification of the drawing. In the present embodiment, the temperature detection means in the present application is configured to have a plurality of temperature sensors (A1 to A3) provided corresponding to each hot zone 24 (see FIG. 7), but others. It may be configured as follows. For example, if a known optical fiber temperature distribution sensor capable of detecting temperatures at a plurality of locations with one optical fiber is used, the temperature detecting means is one temperature sensor provided corresponding to each hot zone 24. A configuration having (one optical fiber temperature distribution sensor) is also conceivable. In short, the number of temperature sensors is not an element that specifies the technical scope of the present invention.

  Next, the rotation speed control device 35 will be described.

  The rotational speed control device 35 determines the rotational speed of the fan 33 based on a temperature difference ΔT obtained by subtracting each temperature corresponding to the air outlet 27 detected by the temperature sensor 34 from a preset target temperature (for example, 35 ° C.). To be determined.

More specifically, the rotation speed control device 35 is represented by the following formula (1).
F = F _d + ΔT × ΔF (1)
Thus, the output frequency F output to the power INV board of each fan 33 is determined. In Expression (1), F _d is a reference output frequency output from the power INV panel to the fan 33, and ΔF is an output that determines how much the output frequency is changed when the temperature difference ΔT is 1 ° C. It is a frequency change width. That is, the rotation speed control device 35 changes the output frequency of the fan 33 by the frequency determined based on the temperature difference ΔT.

  By determining the output frequency F to be output to the power INV panel of each fan 33 by the equation (1), the temperature detected by each temperature sensor 34 (that is, the temperature in the hot zone 24) is set to a predetermined temperature (target temperature). The rotation speed of each fan 33 is controlled so as to keep (the operation of changing the output frequency may be performed while taking a time interval). In this specification, the control process of the rotation speed of the fan 33 by the rotation speed control device 35 is referred to as a temperature sensor non-contrast control process in order to distinguish it from a temperature sensor contrast control process described later.

The reference output frequency F _d and the output frequency change width ΔF may be appropriately determined in consideration of the capacity of the fan 33 and the like. Here, as an example, a case where the reference output frequency F _d is 30 (Hz) and the output frequency change width ΔF is 1.5 (Hz) will be described. Here, for simplification, the case where all the fans 33 are the same will be described. However, when the fans 33 having different characteristics such as capacity are used in combination, the reference output frequency F _d and the output frequency for each fan 33 are used. The change width ΔF may be set individually.

  Hereinafter, the four fans 33 provided on the left side of FIG. 1 are referred to as a first fan group, and the four fans 33 constituting the first fan group are referred to as fans A1 to A4. Further, the four fans 33 provided on the right side of FIG. 1 are referred to as a second fan group, and the four fans 33 constituting the second fan group are referred to as fans B1 to B4.

  The three temperature sensors 34 are referred to as temperature sensors A1 to A3. Fans A1 and B1 correspond to temperature sensor A1, fans A2, A3, B2, and B3 correspond to temperature sensor A2, and fans A4 and B4 correspond to temperature sensor A3.

  As shown in FIGS. 1 and 7, the rotational speed control device 35 is connected to the fans A1 to A4 of the first fan group and the power INV boards of the second fan groups B1 to B4 via signal lines. (The power INV board is not shown). Although not shown in FIG. 1, the rotation speed control device 35 is connected to each temperature sensor A1 to A3 via a signal line.

  Here, the control flow of the rotation speed control process (temperature sensor non-contrast control process) of the fan 33 by the rotation speed control device 35 will be described with reference to FIG. The rotation speed control device 35 is configured to repeatedly execute the control flow of FIG.

As shown in FIG. 8, in the temperature sensor non-contrast control process, first, in step S1, temperatures T _{A1 to} T _A3 are detected by the temperature sensors A1 to _A3 .

  In step S2, the rotational speed control process for each of the fans A1 to A4 in the first fan group is sequentially performed in steps S21 to S24.

Specifically, in the rotational speed control (fan A1 control process) of the fan A1 in step S21, first, in step S21a, the rotational speed control device 35 uses the target temperature (for example, the temperature T _A1 detected by the temperature sensor A1). 35 ° C.) and the temperature difference ΔT _A1 is calculated. Thereafter, in step S21b, the rotation speed control device 35 calculates the output frequency F to be output to the power INV board of the fan A1 based on the temperature difference ΔT _A1 calculated in step S21a according to the above formula (1). FIG. 8 shows a case where the reference output frequency F _d is 30 (Hz) and the output frequency change width ΔF is 1.5 (Hz). Thereafter, in step S21c, the rotation speed control device 35 outputs the output frequency F calculated in step S21b to the power INV board, and controls the rotation speed of the fan A1. Although omitted in FIG. 8, the temperatures T _A2 and T _A3 detected by the temperature sensors A2 and A3 corresponding to the fans A2 to A4 are also used in the rotation speed control processing of the fans A2 to A4 in steps S22 to S24. The same operation as the rotation speed control of the fan A1 in step S21 is performed.

In step S3, in steps S31 to S34, the rotational speed control process for each of the fans B1 to B4 of the second fan group is sequentially performed. Although omitted in FIG. 8, also in the rotation speed control processing of the fans B1 to B4 in steps S31 to S34, the temperatures T _{A1 to} T _A3 detected by the temperature sensors A1 to A3 corresponding to the fans B1 to B4 are used. The same operation as the rotation speed control of the fan A1 in step S21 is performed.

  After performing the rotation speed control process (fan control process) for each of the fans B1 to B4 of the second fan group, the control is terminated.

  The operation of the present embodiment will be described.

  In the data center 10 according to the present embodiment, a plurality of hot zones 24 are defined for one exhaust duct 31. In other words, in the data center 10, one hot zone 24 a divided for one exhaust duct 31 is divided into a plurality of hot zones 24.

  Thereby, for example, when the rack 12 is lent to a certain company, the hot zone 24 can be divided only by the rack 12 lent to the company, and the lent rack 12 and other racks 12 can be divided and managed. Become. Therefore, even if the rack 12 is lent to a certain company, it is possible to secure the security of the electronic equipment 11 arranged in the other rack 12 and maintain the trust of the entire data center 10. It is possible to realize a business model of renting a section of the rack 12.

  Further, in the data center 10, since the unused exhaust duct 26 is covered with a lid 36, when the hot zone 24a is divided, the exhaust port 26 disposed outside the hot zone 24 is covered with the lid 36. Hot air can be prevented from flowing into the air-conditioning chamber 13 from the exhaust port 26, and the number of exhaust ports 26 in the hot zone 24 (the number of exhaust ports 26 without the lid 36) can be adjusted to obtain a hot zone. It is possible to efficiently collect hot air from within 24.

  Further, in the data center 10, substantially one outlet 27 is provided on the ceiling 20 in front of both rack rows 15 of each hot zone 24 so as to correspond to each hot zone 24 for each predetermined number of racks 12. In addition, a fan 33 for blowing conditioned air into the air conditioning chamber 13 is provided at each of the air outlets 27, and a temperature sensor 34 for detecting the temperature in the hot zone 24 is provided in each hot zone 24. At 35, the rotational speed of the fan 33 corresponding to the hot zone 24 provided with each temperature sensor 34 is individually set so that each temperature corresponding to the air outlet 27 detected by each temperature sensor 34 is maintained at a predetermined temperature. I try to control it.

  The conventional data center employs a method in which the conditioned air is sent in a batch by the fan of the air conditioner, and only the total amount of the conditioned air to be sent can be adjusted. The supply amount of the conditioned air can be individually adjusted every 24, and the conditioned air can be supplied to each rack 12 by the amount necessary for cooling so that the temperature detected by the temperature sensor 34 becomes constant. It becomes possible.

  Therefore, according to the present invention, it is possible to realize the data center 10 in which fan power is reduced and energy saving is further improved while maintaining a sufficient cooling effect for each rack 12.

  In the data center 10, since the fan 33 is provided in each of the air outlets 27, a fanless air conditioner can be used as the air conditioner, and the power consumption in the air conditioner can be reduced.

  Next, another embodiment of the present invention will be described.

  The data center 91 shown in FIG. 9 is provided with a plurality of (two in this case) exhaust ducts 31 arranged in parallel, and a plurality of hot zones 24 are divided for each of the plurality of exhaust ducts 31.

  The data center 91 is further divided into two hot zones 24 on the right side of the three hot zones 24 of the data center 10 described in FIG. Here, the hot zone 24 partitioned in the upper right in FIG. 9 is configured by two racks 12, and the hot zone 24 partitioned in the lower right is configured by ten racks 12. Each hot zone 24 is partitioned with the arrangement direction of the rack rows 15 aligned so that the front surfaces F of the rack rows 15 constituting each hot zone 24 corresponding to the adjacent exhaust ducts 31 face each other.

  Provided on the ceiling 20 of the air-conditioning chamber 13 between the hot zones 24 corresponding to the adjacent exhaust ducts 31 (that is, the ceiling 20 between the three hot zones 24 on the left side in the drawing and the two hot zones 24 on the right side in the drawing). The air outlets 27 are arranged in the arrangement direction of the rack rows 15 arranged so that the front surfaces F face each other. In each rack 12), substantially one common outlet 27 (common outlet) is formed. As described with reference to FIG. 6, each hot zone 24 divided on the left or right side in FIG. 9 is formed by removing the rack 12 from the hot zone 24a before division and dividing one hot zone 24a. However, one outlet 27 is formed for each of the two racks 12 in the hot zone 24a before the division. Each of the air outlets 27 is provided with a fan 33.

  A temperature sensor 34 is provided in each hot zone 24. In the data center 91, with respect to the fans 33 provided between the hot zones 24 corresponding to the adjacent exhaust ducts 31, the hot zones 24 are partitioned so as to sandwich the fans 33. The temperature sensor 34 corresponds.

  In the data center 91 according to another embodiment of the present invention, the rotation speed control device 35 is a fan related to the air outlet 27 (common air outlet) provided between the hot zones 24 corresponding to the adjacent exhaust ducts 31. The rotational speed of 33 is controlled so as to keep the higher one of the two temperatures corresponding to the air outlet 27 (common air outlet) detected by the two temperature sensors 34 at a predetermined temperature. Such control processing of the rotational speed of the fan 33 by the rotational speed control device 35 is referred to as temperature sensor contrast control processing. Regarding the fans 33 other than the fans 33 provided between the hot zones 24 corresponding to the adjacent exhaust ducts 31, that is, the fans 33 provided on both sides (the left end and the right end in FIG. 9) of the five hot zones 24 The rotational speed is controlled by the temperature sensor non-contrast control process described in FIG. That is, in the data center 91, different control processing is performed between the fans 33 provided between the hot zones 24 corresponding to the adjacent exhaust ducts 31 and the other fans 33.

  Hereinafter, three fan groups provided in the data center 91 (two fan groups provided at the left end and the right end in FIG. 9 and one fan group provided at the center in FIG. 9) are moved from the left to the right in FIG. These are referred to as a first fan group, a third fan group, and a second fan group.

  The four fans 33 constituting the first fan group are fans A1 to A4, the four fans 33 constituting the second fan group are fans B1 to B4, and the four fans 33 constituting the third fan group are fans C1 to C4. And

  Further, the three temperature sensors 34 provided in the left hot zone 24 in FIG. 9 are referred to as a first temperature sensor group, and the two temperature sensors 34 provided in the right hot zone 24 in FIG. 9 are referred to as a second temperature sensor group. It is called.

  Three temperature sensors 34 constituting the first temperature sensor group are temperature sensors A1 to A3, and two temperature sensors 34 constituting the second temperature sensor group are temperature sensors B1 and B2.

  Temperature sensor A1 corresponds to fan A1, temperature sensor A2 corresponds to fans A2 and A3, temperature sensor A3 corresponds to fan A4, temperature sensor B1 corresponds to fan B1, and fans B2 to B4. Each corresponds to the temperature sensor B2. Further, the temperature sensors A1 and B1 correspond to the fan C1, the temperature sensors A2 and B2 correspond to the fans C2 and C3, and the temperature sensors A3 and B2 correspond to the fan C4, respectively.

  As shown in FIGS. 9 and 10, the rotation speed control device 35 includes the fans A1 to A4 of the first fan group, the fans B1 to B4 of the second fan group, and the fans C1 to C4 of the third fan group. It is connected to the power INV board via a signal line (the power INV board is not shown). Although not shown in FIG. 9, the rotation speed control device 35 is connected to each temperature sensor A1 to A3 of the first temperature sensor group and each temperature sensor B1 and B2 of the second temperature sensor group via a signal line. Has been.

  Here, the control flow of the fan control process by the rotation speed control device 35 will be described with reference to FIGS.

As shown in FIG. 11, the rotation speed control device 35 is configured to repeatedly execute the temperature sensor non-contrast control process in step S100 and the temperature sensor contrast control process in step S200. The temperature sensor non-contrast control process in step S100 is the same as the control flow described in FIG. However, in the data center 91, the temperatures T _B1 and T _B2 detected by the temperature sensors B1 and _B2 are used in the rotation speed control of the fans B1 to B4 of the second fan group in steps S31 to S34 in FIG. .

In the temperature sensor comparison control process of step S200, as shown in FIG. 12, first, in step S5, the temperature T1 is measured by the temperature sensors A1 to A3, B1, and B2 of the first temperature sensor group and the second temperature sensor group. _{A1 to} T _A3 , T _B1 , and T _B2 are detected.

  In step S6, the rotational speed control process of each fan C1-C4 of the third fan group is sequentially performed in steps S61-S64.

Specifically, in the rotation speed control of the fan C1 in step S61, first, in step S61a, the temperature T _A1 detected by the rotation speed control device 35 with the temperature sensor A1 is the temperature T _B1 detected with the temperature sensor _B1. It is detected whether it is above. If YES is determined in step S61a, the target temperature (for example, 35 ° C.) is subtracted from the temperature T _A1 detected by the temperature sensor A1 in step S61b to calculate a temperature difference ΔT _A1 . Thereafter, in step S61c, the rotation speed control device 35 calculates the output frequency F to be output to the power INV panel of the fan C1 based on the temperature difference ΔT _A1 calculated in step S61b, according to the above equation (1). Proceed to S61f.

On the other hand, if NO is determined in step S61a, the target temperature (for example, 35 ° C.) is subtracted from the temperature T _B1 detected by the temperature sensor B1 in step S61d to calculate the temperature difference ΔT _B1 . Thereafter, in step S61e, the rotation speed control device 35 calculates the output frequency F to be output to the power INV panel of the fan C1 based on the temperature difference ΔT _B1 calculated in step S61d, according to the above equation (1). Proceed to S61f.

  In step S61f, the rotation speed control device 35 outputs the output frequency F calculated in step S61c or step S61e to the power INV board, and controls the rotation speed of the fan C1.

Although omitted in FIG. 12, the rotation speed control process for the fans C2 to C4 in steps S62 to S64 is the same as the rotation speed control for the fan C1 in step S61 (the rotation speed control process for the fans C2 and C3). Then, the temperatures T _A2 and T _B2 detected by the corresponding temperature sensors A2 and B2 are used, and the temperatures T _A3 and T _B2 detected by the corresponding temperature sensors A3 and B2 are used in the rotation speed control processing of the fan C4.

  After performing the rotational speed control process for each of the fans C1 to C4 in the third fan group, the control is terminated.

  In the data center 91, the rotational speed of the fan 33 provided between the hot zones 24 corresponding to the adjacent exhaust ducts 31 is set to the higher one of the temperatures detected by the two temperature sensors 34 corresponding to the fans 33. Since the control is performed so that the temperature is kept at a predetermined temperature, the rotational speed of the fan 33 can be controlled so that a sufficient amount of conditioned air can be supplied to the hot zone 24 having the rack 12 that generates a large amount of heat. It is possible to suppress the occurrence of problems in the electronic device 11 in the rack 12 due to a shortage of the supply amount of conditioned air to the rack 12.

  The present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the spirit of the present invention.

  For example, in the above embodiment, the case where the temperature sensor 34 is used as the temperature detection unit has been described. However, the temperature detection unit is not limited to this, and for example, an optical fiber temperature sensor may be used. When an optical fiber temperature sensor is used, a common optical fiber is disposed in each hot zone 24, and the temperature distribution in the longitudinal direction of the optical fiber is detected to detect the temperature in each hot zone 24. That's fine.

  Further, in the above embodiment, the case where the rotation speed of each fan 33 is individually controlled so as to keep the temperature detected by each temperature sensor 34 at a predetermined temperature has been described. You may make it control the rotation speed of each fan 33 separately so that temperature may be kept in a predetermined temperature range (for example, 34 to 36 degreeC).

In this case, based on a preset temperature T _high (for example, 36 ° C.) and a minimum threshold temperature T _low (for example, 34 ° C.), the temperature measured by each temperature sensor 34 is the maximum threshold. When the temperature is higher than T _{high, the} number of rotations of the corresponding fan 33 is increased by a certain value (for example, the output frequency of the power INV panel is increased by 2 Hz per minute. It may be done in some cases). When the temperature measured by each temperature sensor 34 is lower than the minimum temperature T _low , the rotation speed of the corresponding fan 33 is decreased by a certain value (for example, the output frequency of the power INV panel is reduced to 1 minute). The operation for lowering may be performed while taking a time interval). The operation of changing the output frequency to each fan 33 may be performed by normal PID control or a combination thereof, and this control method is not limited.

  Moreover, although the case where a fanless air conditioner is used as the air conditioner has been described in the above embodiment, an air conditioner having a fan can also be used.

10 Data Center 11 Electronic Equipment 12 Rack 13 Air Conditioning Room 14 Floor 15 Rack Row 20 Ceiling 21 Panel 23 Partition 24 Hot Zone 26 Exhaust Outlet 27 Outlet 31 Exhaust Duct 32 Outlet Duct 33 Fan 34 Temperature Sensor (Temperature Detection Means)
35 Speed controller

Claims (6)

At least an air-conditioning room, a rack row in which one or more racks that house multiple electronic devices such as servers on the floor surface of the air-conditioning room are arranged in the left-right direction, and an electronic device housed in the rack An air conditioner for air-conditioning the air-conditioned room to remove generated heat,
The back surfaces of the rack rows are arranged on the floor surface of the air conditioning room facing each other with a space therebetween, and the left and right ends of the facing rack rows are arranged from the lower edge of the rack row to the air conditioning room. A panel extending to the ceiling is provided, a partition extending to the ceiling is provided above the front edge of both rack rows, a hot zone is defined in the air conditioning chamber, and an exhaust port for exhausting the heat of the hot zone to the ceiling in the hot zone Are formed outside the hot zone and in front of the two rack rows in front of the rack rows, and blown out the conditioned air from the air conditioners. In a data center that is introduced into the hot zone from the front to the back,
An exhaust duct for guiding the air collected from the exhaust port to the air conditioner;
A data center characterized in that a plurality of hot zones are defined for one exhaust duct.   The data center according to claim 1, wherein the exhaust duct is formed with a plurality of exhaust ports, and the unused exhaust duct is covered.   The data center according to claim 1, wherein the panel is provided with a door for entering and exiting the hot zone. In the ceiling in front of both rack rows of each hot zone, substantially one said air outlet is provided for each predetermined number of racks so as to correspond to each hot zone, and each of the air outlets is provided. A fan for blowing out conditioned air in the air conditioning room is provided,
A temperature detecting means for detecting the temperature in the hot zone is provided in each hot zone, and the temperature in each hot zone corresponding to the air outlet detected by the temperature detecting means is a predetermined temperature range, or The data center according to any one of claims 1 to 3, further comprising a rotation speed control device that individually controls the rotation speed of the fan so as to maintain a predetermined temperature. A plurality of the exhaust ducts are provided in parallel, and a plurality of the hot zones are defined for each of the plurality of the exhaust ducts, and the front surface of the rack row constituting each of the hot zones corresponding to the adjacent exhaust ducts In the case where the hot zones are partitioned by aligning the arrangement direction of the rack rows so that they face each other,
The air outlets provided in the ceiling of the air conditioning chamber between the hot zones corresponding to the adjacent exhaust ducts are arranged for each predetermined number of racks in the arrangement direction of the rack rows aligned so that the front faces each other. A common outlet which is substantially one of the outlets;
The rotation speed control device is configured to set the rotation speed of the fan related to the common air outlet provided between the hot zones corresponding to the adjacent exhaust ducts to the common air outlet detected by the temperature detection unit. The data center according to claim 4, wherein a higher one of the temperatures in the corresponding plurality of hot zones is controlled to be kept within a predetermined temperature range or a predetermined temperature.   The data center according to claim 4 or 5, wherein a fanless air conditioner having no fan is used as the air conditioner.

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