JP2016145671A - Air conditioning system, program, determination method, control method, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning system capable of further reducing costs by reducing power consumption.SOLUTION: An air conditioning system is provided with a supply passage for supplying air into an air-conditioned room, at a ceiling space of the air-conditioned room where a rack equipped with an electronic equipment device is disposed, an opening is formed on a ceiling plate of the air-conditioned room, and a cooling device for cooling the air discharged from the rack and flowing into the ceiling space through the suction opening, and discharging cold air to the supply passage, and a blower disposed on the opening and supplying the cold air passing through the supply passage to the air-conditioned room, are disposed between the air-conditioned room and the ceiling space. The blower is disposed on a suction surface at a side for sucking the cold air of the rack to suck the cold air, and further disposed to a rack set determined on the basis of the air volume necessary for the rack set composed of a pair of the racks.SELECTED DRAWING: Figure 14

Description

  The present invention relates to an air conditioning system, a program, a determination method, a control method, and a recording medium.

  In recent years, with the expansion of Internet services and the like, the role of a data center in which servers and network devices that perform information processing are gathered in one place is increasing. In such a data center, an air conditioning system for cooling the electronic device is required.

  As an example of an air conditioning system, for example, Patent Literature 1 describes an air conditioning facility in which an air volume adjusting device is provided for each blowing unit. Patent Document 2 describes a ventilation system for ventilating a plurality of rooms. Patent Document 3 describes an air conditioning facility for a clean room.

JP 2012-177520 A JP 2008-8528 A JP 2009-127940 A

  As the amount of information processed in the data center increases, the power consumption of the data center also increases. Therefore, a technique for reducing the power consumption of the entire data center is required. Therefore, there is a need for a technique for reducing the power consumption of an air conditioner (air conditioning system) for cooling an electronic device included in a data center.

  In many cases, the cables of the electronic equipment installed in the data center are laid under the floor. Such cables for electronic device apparatuses may be laid under the floor as they are in order to avoid troubles caused by removing cables that are no longer used due to replacement of electronic apparatus devices. Therefore, many cables exist under the floor.

  In the technique described in Patent Document 1, air is blown out from the ceiling toward the target space, the air is transferred to the bottom of the floor, and the transferred air is taken in and further controlled to be blown out from the ceiling to the target space. In this method, cables laid under the floor may obstruct the air flow. Therefore, in the air conditioning system using the technique described in Patent Document 1, the air conditioning efficiency is reduced. In addition, when such an air conditioning system maintains the fan speed and cooling efficiency, power consumption increases.

  In the technique described in Patent Document 2, a plurality of rooms are ventilated with one ventilation system. Therefore, when the air flow rate for a certain room is adjusted to a predetermined amount, the air flow rate for another room may be larger or smaller than the necessary air flow rate for the other room. Therefore, in the technique described in Patent Document 2, if a necessary amount of air is blown to all of the plurality of rooms, power consumption may increase.

  In the technique described in Patent Document 3, there is no description about the number of fans (fans). For this reason, in the technique described in Patent Document 3, the arrangement of the blower may not be optimized. In the air conditioning system of the data center, if the arrangement of the blowers is not optimized, the power consumption may increase. This is because as the number of fans increases, the air conditioning efficiency can be increased, but more power is consumed to operate these fans. On the other hand, if the number of blowers is small, the air conditioning efficiency decreases.

  Moreover, when the arrangement | positioning of the air blower is not optimized, in order not to reduce an air conditioning efficiency, it is necessary to arrange many air blowers. This incurs a lot of installation costs.

  Therefore, the present inventor has proposed an air conditioning system that further reduces power consumption in a double-structure ceiling (Japanese Patent Application No. 2014-148951). And this inventor considered the structure of the air-conditioning system which reduces cost more.

  An object of the present invention is to realize an air conditioning system that reduces power consumption and further reduces costs.

  An air conditioning system according to one aspect of the present invention is an air conditioning system that performs air conditioning of an air-conditioned room in which a rack on which an electronic device is mounted is installed, and the air-conditioned room is provided in a ceiling space of the air-conditioned room A supply passage for supplying air is formed, an opening is provided in the ceiling plate of the air-conditioned room, and the air from the air-conditioned room is placed between the air-conditioned room and the ceiling space. A cooling device that is provided with a suction port for sending out to the ceiling space, cools air that is discharged from the rack and flows into the ceiling space through the suction port, and discharges cold air to the supply passage; A blower that is provided in the opening and that supplies the cold air that has passed through the supply passage to the air-conditioned room, and the blower sucks the cold air into a suction surface of the rack that sucks the cold air. It is provided so that Further, the blower requires an air volume required by a rack set including a pair of racks arranged at a predetermined interval so that the suction surfaces face each other, and a plurality of rack sets. It is provided for one or a plurality of rack sets determined based on at least one of the air volumes.

  In addition, the determination method which determines installation of the air blower of the said air conditioning system, and the control method which controls the air blower of the said air conditioning system are also contained under the category of this invention.

  Also, a computer program for realizing a design device for determining installation of a fan of the air conditioning system and a control device for controlling the fan of the air conditioning system by a computer, and a computer-readable storage medium storing the computer program Are also included in the scope of the present invention.

  According to the present invention, it is possible to realize an air conditioning system that reduces power consumption and further reduces costs.

It is a side view showing the whole air-conditioning system outline concerning a 1st embodiment of the present invention. It is a figure at the time of seeing the air-conditioning system of FIG. 1 from the x-axis negative direction. It is an AA line arrow figure of FIG. It is a BB line arrow figure of FIG. It is a functional block diagram which shows an example of a function structure of the design apparatus in the air conditioning system which concerns on the 1st Embodiment of this invention. It is a flowchart which shows an example of the flow of the determination process of the design apparatus in the air conditioning system which concerns on the 1st Embodiment of this invention. It is a functional block diagram which shows an example of a function structure of the control apparatus in the air conditioning system which concerns on the 1st Embodiment of this invention. It is a flowchart which shows an example of the flow of the control processing of the control apparatus in the air conditioning system which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the temperature distribution in the air-conditioned room which air-conditioned using the air conditioning system which concerns on the 1st Embodiment of this invention. FIG. 10 is a view taken along the line CC of FIG. 9. FIG. 10 is a view taken along the line D-D in FIG. 9. It is a figure which shows an example of the hardware constitutions of the design apparatus which concerns on the 1st Embodiment of this invention, a control apparatus, and a control part. It is a figure for demonstrating the outline | summary of the air conditioning system which concerns on the 2nd Embodiment of this invention. It is a figure for demonstrating the concept of the air conditioning system which concerns on the 3rd Embodiment of this invention.

<First Embodiment>
A first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing an overall outline of the air conditioning system according to the present embodiment. As shown in FIG. 1, an air conditioning system 100 according to the present embodiment is a system that uses a fan unit 10 to perform air conditioning in an air-conditioned room 1 in which a plurality of racks 2 are installed.

  A specific configuration of the air conditioning system 100 will be described with reference to FIGS. 2 is a diagram of the air conditioning system 100 of FIG. 1 as viewed from the negative x-axis direction (left direction of FIG. 1). In FIG. 2, the partition 1a is not shown for convenience of explanation. Moreover, FIG. 3 is an AA line arrow figure of FIG. 1 and FIG. Moreover, FIG. 4 is a BB line arrow figure of FIG. 1 and FIG. In FIGS. 1 to 4, the air flow is indicated by broken-line arrows.

  A plurality of racks 2 are installed in the air-conditioned room 1. As shown in FIG. 2, in the air-conditioned room 1 in the present embodiment, a plurality of racks 2 are installed so as to form a row (referred to as a rack row). The rack 2 is equipped with one or more electronic device devices. The rack 2 has a suction surface (referred to as a front surface 2a) for sucking cold air C1 and a surface (referred to as a back surface 2b) for discharging warm air W1. The rack 2 is installed so that the front surface 2a faces the same direction in one row.

  The air-conditioned room 1 includes a plurality of rack rows (two rows in FIGS. 1 to 4). The rack rows are installed at a predetermined interval from each other. The racks 2 included in one rack row and the racks 2 in the other rack row are installed so that the front surfaces 2a face each other.

  In the present embodiment, the rack 2 has two rows and the number of racks 2 in each row is six as an example, but the present invention is not limited to this.

  Further, the air-conditioned room 1 includes a space on the front surface 2a side and a space on the rear surface 2b side of the rack 2 so that the cool air sucked into the front surface 2a of the rack 2 and the warm air discharged from the rear surface 2b are not mixed. A partition 1a is provided. The material of this partition 1a is not specifically limited, What is necessary is just what does not mix cold air and warm air by installing.

  Further, as shown in FIG. 2, for example, there is a space such as a corridor (corridor 9 in FIG. 1) around the air-conditioned room 1. The corridor 9 and the air-conditioned room 1 are spaces separated by walls 8 or the like so that the mutual air does not come and go. The section such as the corridor 9 may have a configuration in one direction of the air-conditioned room 1 as shown in FIG.

  The air-conditioned room 1 and the space above the ceiling of the air-conditioned room 1 (ceiling back space) are separated by a ceiling plate 4. That is, the surface of the ceiling plate 4 on the air-conditioned room 1 side is the ceiling of the air-conditioned room 1. In the space behind the ceiling, a chamber 3 is formed as a supply passage for supplying (supplying) cold air (cold air C1) to the air-conditioned room 1. The chamber 3 is continuous over the entire upper surface of the ceiling plate 4 (the surface of the ceiling plate 4 opposite to the surface of the air-conditioned room 1). In the present embodiment, the chamber 3 is also referred to as a supply chamber.

  Further, as shown in FIG. 2, a suction slit (suction) for sending air (warm air W <b> 1) of the air-conditioned room 1 to the chamber 3 between the air-conditioned room 1 and the ceiling space and in the upper part of the corridor 9. Mouth) 5 is provided. As shown in FIG. 2, the suction slit 5 is provided so as to partition the space above the hallway 9 and the air-conditioned room 1. As shown in FIGS. 2 and 3, the suction slit 5 has a direction (x) in which the air suction surface is substantially perpendicular to the direction (z-axis direction) substantially parallel to the rack row in the air-conditioned room 1. (Axial direction) is preferably provided. That is, the suction slit 5 is provided on the floor plane (xz-axis plane) of the air-conditioned room 1 such that the air suction surface is substantially perpendicular to the hot aisle formed by the warm air W1 discharged from the rack 2. It is preferred that Warm air W <b> 1 in the air-conditioned room 1 is sent to the chamber 3 through the suction slit 5. The suction slit 5 is not particularly limited as long as it can suitably suck the warm air W1 of the air-conditioned room 1 without staying in the air-conditioned room 1, and the shape and material thereof are not particularly limited.

  Further, as shown in FIGS. 2 and 3, a humidifier 41 is installed in the upper part of the hallway 9. The humidifier 41 adjusts the air to a predetermined humidity by dehumidifying or humidifying the warm air W <b> 1 sent to the space on the hallway through the suction slit 5. Thereby, even if it is a case where the change of the humidity by disturbance occurs, the air conditioning system 100 can send the air of the stable humidity to the air-conditioned room 1. The number of humidifiers 41 is not particularly limited as long as the humidity of air can be stabilized.

  Moreover, it is preferable that the humidifier 41 is a vaporization type humidifier. In addition, as shown in FIG. 2, the humidifier 41 is preferably installed at a position other than the upper part of the air-conditioned room 1 as on the hallway 9. Thereby, for example, the risk of water leakage from the humidifier 41 can be kept away from the air-conditioned room 1.

  In addition, a cooling device 51 is installed on the ceiling plate 4 as shown in FIG. The cooling device 51 used in the present embodiment is, for example, a cooling coil. Examples of the cooling coil include a dry coil in which the temperature of cold water used in the cooling coil is 15 ° C. to 25 ° C., but the present invention is not limited to this. The cooling device 51 cools the input warm air W <b> 1 and discharges the cool air C <b> 1 to the chamber 3. The cooling device 51 is connected to a heat source device (not shown). When the heat source device supplies cold water, the cool air C1 having a predetermined temperature is discharged. The number of the cooling devices 51 is not particularly limited, and may be any number that can discharge the cool air C1 having a predetermined temperature.

  Moreover, although the cooling device 51 is installed in the state stood | rightened with respect to the ceiling board 4 in FIG. 2, this invention is not limited to this. The cooling device 51 may be configured to form a predetermined angle with respect to the ceiling plate 4.

  As shown in FIGS. 1 and 4, an opening 4 a is formed in the ceiling plate 4. The opening 4 a passes through the air-conditioned room 1 and the chamber 3. In FIG. 4, for convenience of explanation, the rack 2 shown in FIG. 3 is indicated by a two-dot chain line, and the suction slit 5 is indicated by a one-dot chain line.

  The position on the ceiling plate 4 where the opening 4a is formed is preferably a position where the cold air C1 can be sent to the front surface 2a of the rack 2 with respect to the air-conditioned room 1. For example, the position where the opening 4a is formed is preferably the upper part of a passage (cold aisle) formed by installing the front surfaces 2a of the rack 2 facing each other.

  Moreover, as shown in FIG. 2, it is preferable that the cooling device 51 is installed in the position which is not the upper part of the air-conditioned room 1 like the hallway 9. As shown in FIG. Thereby, for example, the risk of water leakage from the cooling device 51 and the pipe for supplying the cold water connected to the cooling device 51 can be kept away from the air-conditioned room 1.

  A fan unit 10 including a blower 11 is attached to the opening 4a. The fan unit 10 includes a blower 11 and a control unit 13 (not shown) that controls the rotational speed of the blower 11. The control unit 13 controls the rotational speed of the blower 11 associated with the control unit 13 in accordance with an instruction from the control device 20 described later.

  The blower 11 of the fan unit 10 supplies the cold air C <b> 1 that has passed through the chamber 3 to the air-conditioned room 1. The blower 11 is provided so that the cool air C <b> 1 is sucked into the front surface 2 a of the rack 2. In FIG. 4, one fan unit 10 is provided for two racks 2 that are installed so that the front surfaces 2 a face each other. This is determined by the design device 30 described later. . The process flow for determining the arrangement of the fan units 10 will be described later.

(Air flow of the air conditioning system 100)
Next, the flow of air will be described with reference to FIGS. Warm air W1 (see FIGS. 1 and 3) discharged from the back surface 2b of the rack 2 passes through the suction slit 5 (see FIGS. 2 and 3). The warm air W1 is cooled by the cooling device 51. The cooling device 51 discharges the cooled air (cold air C1) to the chamber 3 (see FIGS. 2 and 4). The cool air C1 passing through the chamber 3 is supplied into the air-conditioned room 1 by the blower 11 (see FIG. 1). The cold air C1 supplied from the blower 11 is sucked into the rack 2 from the front surface 2a of the rack 2 (see FIGS. 1 and 3).

(About the design device 30)
Next, the design device 30 that determines the arrangement of the fan units 10 will be described. FIG. 5 is a functional block diagram illustrating an example of a functional configuration of the design apparatus 30 according to the present embodiment. As illustrated in FIG. 5, the design apparatus 30 according to the present embodiment includes a calculation unit 301 and a determination unit 302. FIG. 6 is a flowchart showing an example of the flow of determination processing of the design apparatus 30 according to the present embodiment. The function of the design apparatus 30 will be described with reference to FIGS.

  The calculation unit 301 receives input of information necessary for determining the arrangement of the fan units 10. This necessary information is input by the designer using an input device or the like, for example. For example, the calculation unit 301 may be information stored in a storage device (not shown), and may acquire information necessary for the determination from the storage device.

  The calculation unit 301 receives, for example, the value of the amount of heat generated by the rack 2 and information on the environment in which the rack 2 is arranged (step S1 in FIG. 6). The information on the environment in which the rack 2 is arranged includes, for example, the mass of air in the air-conditioned room 1, the specific heat of air in the air-conditioned room 1, the temperature of cold air (supply air) supplied to the rack 2, The temperature of warm air (exhaust) discharged from the rack 2 can be mentioned. These values may be values measured in an actual environment or estimated values. In the present embodiment, it is assumed that the sum of the maximum values of heat generated by each electronic device mounted on the rack 2 is used as the value of heat generated by the rack 2. Hereinafter, the amount of heat generated by the rack 2 is referred to as the amount of heat generated by the rack 2.

The calculation unit 301 receives the received (acquired) information and information necessary for determining the arrangement of the fan units 10. Then, using the following formula (1), a ventilation air volume V (m ³ / min), which is an air volume necessary per second, is obtained for a group of racks 2 (referred to as a rack group) (FIG. 6). Step S2). The rack set is a pair of racks 2 arranged at a predetermined interval so that the front surfaces 2a face each other.

Here, Q1 is a generated heat amount (kcal / h) (first heat amount) of one rack 2 (referred to as rack 2A) of a certain rack set. Q2 is a heat generation amount (kcal / h) (second heat amount) of the rack 2A (referred to as a rack 2B) facing the rack 2A and the front surface 2a. γ is the mass of air in the air-conditioned room 1 (kg / m ³ ), and is assumed to be 1.2 kg / m ³ in the present embodiment. Cρ is the specific heat of the air in the air-conditioned room 1 (kJ / kg · ° C.), and is assumed to be 1.006 kJ / kg · ° C. in the present embodiment. Further, t1 is the temperature (° C.) of the cold air (supply air) supplied to the rack 2A and the rack 2B. t2 is the temperature (° C.) of warm air (exhaust) discharged from the rack 2A or the rack 2B, or the average value (° C.) of the temperature of warm air discharged from the rack 2A or the rack 2B.

  Thereby, the calculation part 301 calculates | requires the ventilation air volume V with respect to the rack 2 (rack group) which opposes. The calculation unit 301 obtains the ventilation air volume V for all the racks 2 arranged in the air-conditioned room 1. Then, the calculation unit 301 outputs the obtained ventilation air volume V to the determination unit 302.

  The determination unit 302 receives the ventilation air volume V calculated by the calculation unit 301 from the calculation unit 301. And the determination part 302 determines arrangement | positioning of the fan unit 10 arrange | positioned in the air-conditioned room 1 using the received ventilation air volume V (step S3 of FIG. 6). That is, the determination unit 302 determines the position of the rack 2 and the number of racks 2 to which the blower 11 of the fan unit 10 blows the cool air C1.

  For example, when the ventilation air volume V of the rack 2 arranged in a certain area in the air-conditioned room 1 is smaller than the air volume from the fan unit 10, the determination unit 302 has one fan unit for a plurality of sets of racks 2. 10 may be determined to be installed. That is, the determination unit 302 determines the position and number of racks 2 to be supplied by one fan unit 10 according to the ventilation air volume V.

  The calculating unit 301 may further calculate the ventilation air volume V for the plurality of racks 2. For example, a case will be described in which the determining unit 302 determines that three sets of racks 2 are blown by one fan unit 10 based on the ventilation air volume V calculated by the calculating unit 301. At this time, the calculation unit 301 sets Q1 as the heat generation amount of the three racks 2 included in one rack row, and generates three racks 2 included in the other rack row. The ventilation air volume V may be obtained with the heat quantity as Q2. And the determination part 302 may determine the fan unit 10 to arrange | position based on the ventilation air volume V further calculated by the calculation part 301. FIG.

  Thus, the design apparatus 30 can determine the position and number of racks 2 to which the fan unit 10 is to be blown.

  In the present embodiment, it is assumed that the determination unit 302 determines to install one fan unit 10 for one set of racks 2. And the fan unit 10 is installed as shown in FIG. 4 based on the result of the determination process of the design apparatus 30.

  Hereinafter, the fan unit 10 that sends the cool air C1 to the front surface 2a of a certain rack 2 is referred to as a “fan unit 10 corresponding to the rack 2”.

(About the control device 20)
Next, the control device 20 that controls the control unit 13 of the fan unit 10 will be described. For example, the control device 20 is provided in a region outside the air-conditioned room 1 such as a corridor 9. Thereby, the area | region in the air-conditioned room 1 can be used effectively. Therefore, the installation efficiency of the rack 2 can be improved.

  FIG. 7 is a functional block diagram showing a functional configuration of the control device 20 according to the present embodiment. As shown in FIG. 7, the control device 20 includes one or more control units (13-1 to 13-N (N is a natural number)) and one or more front-side thermometers (21-1 to 21-M (M is Natural number)) and one or more backside thermometers (22-1 to 22-L (L is a natural number)). FIG. 8 is a flowchart showing an example of the flow of control processing of the control device 20 according to the present embodiment. The function of the control device 20 will be described with reference to FIGS.

  In the present embodiment, when each of the plurality of control units 13-1 to 13-N is not distinguished or collectively referred to, they are referred to as the control unit 13. Similarly, when the front-side thermometers 21-1 to 21-M are not distinguished from each other or are collectively referred to, they are called the front-side thermometer 21 and the rear-side thermometers 22-1 to 22-M. When these are not distinguished from each other or when they are collectively referred to, they are referred to as a back side thermometer 22.

  The front surface side thermometer 21 is installed on the front surface 2a side of the rack 2, and measures the temperature of the cold air C1 sucked from the front surface 2a. The front side thermometer 21 may be provided for each rack 2 or may be provided for each predetermined number of racks 2. Further, the front side thermometer 21 may be provided for each fan unit 10. Moreover, the installation position of the front surface side thermometer 21 is not specifically limited, What is necessary is just the position which can measure the temperature of the cool air C1. The installation position of the front-side thermometer 21 may be, for example, the ceiling on the cold aisle (on the surface of the ceiling board 4 on the air-conditioned room 1 side) or the front surface 2a of the rack 2. In the present embodiment, description will be made assuming that one front-side thermometer 21 is provided for each fan unit 10. In the present embodiment, as described above, one fan unit 10 is provided for the two racks 2 installed so that the front surfaces 2a face each other. Therefore, it is assumed that one front-side thermometer 21 in the present embodiment is provided for two racks 2 that are installed with the front surfaces 2a facing each other.

  The back surface side thermometer 22 is installed on the back surface 2b side of the rack 2, and measures the temperature of the warm air W1 discharged from the back surface 2b. The back side thermometer 22 may be installed for each rack 2 or may be provided for each predetermined number of racks 2. Moreover, the installation position of the back surface side thermometer 22 is not specifically limited, What is necessary is just the position which can measure the temperature of the warm air W1. The installation position of the rear side thermometer 22 may be, for example, the ceiling on the hot aisle (on the surface of the ceiling board 4 on the air-conditioned room 1 side) or the rear surface 2b of the rack 2. In the present embodiment, the back side thermometer 22 will be described as an example in which the back side thermometer 22 is provided for each row included in the set of racks 2 to be blown by the fan unit 10. That is, when the set of racks 2 to be blown by the fan unit 10 is three sets, the rear-side thermometer 22 includes two racks 2 included in one rack row and 3 included in the other rack row. Assume that one rack 2 is provided.

  The control device 20 receives measurement results (temperatures) from each front-side thermometer 21 and each back-side thermometer 22.

  As illustrated in FIG. 7, the control device 20 includes a storage unit 201 and an instruction transmission unit (control unit) 202.

  In the storage unit 201, information (position information) indicating the installation positions of the front-side thermometer 21 and the rear-side thermometer 22, and the front 2a side of the rack 2 in which the front-side thermometer 21 and the rear-side thermometer 22 are installed. The information (fan unit information) indicating the fan unit 10 installed in the upper part of the space (cold aisle) is stored in association with each other. The storage unit 201 may be built in the control device 20 or may be realized by a storage device connected to the outside of the control device 20.

  In addition, information stored in the storage unit 201 in the case where one front-side thermometer 21 and / or one rear-side thermometer 22 is installed for a predetermined number of racks 2 will be described. In this case, the storage unit 201 includes a set of fan unit information indicating the fan units 10 corresponding to each of the predetermined number of racks 2 and a position indicating the installation position of the front-side thermometer 21 and / or the rear-side thermometer 22. Stored in association with information.

  The timing at which the information is stored in the storage unit 201 may be the timing at which the front-side thermometer 21 or the rear-side thermometer 22 is installed, or the timing at which the air conditioning system 100 starts operation. Alternatively, other timing may be used.

  The instruction transmission unit 202 receives the measurement result from each front-side thermometer 21 and / or each back-side thermometer 22 (step S11 in FIG. 8). The instruction transmission unit 202 identifies the position where the front-side thermometer 21 or the rear-side thermometer 22 that has transmitted the measurement result is installed (step S12 in FIG. 8). Then, the instruction transmission unit 202 acquires fan unit information associated with the position information of the specified position from the storage unit 201 (step S13 in FIG. 8).

  Thereafter, the instruction transmission unit 202 generates an instruction to control the rotation speed of the blower 11 of the fan unit 10 indicated by the acquired fan unit information based on the received measurement result (step S14 in FIG. 8). At this time, the instruction transmission unit 202 may calculate the rotation speed of the blower 11 of the fan unit 10 and generate an instruction for controlling the blower 11 to be at the rotation speed. The air volume of the blower 11 of the fan unit 10 is adjusted between the minimum value and the maximum value of the ventilation air volume V calculated using the above-described equation (1). The minimum value of the ventilation airflow V is the minimum airflow that the blower 11 can blow. In addition, the maximum value of the ventilation airflow V is the maximum value of the heat generation amount of the rack 2 included in one rack row among the one or a plurality of racks 2 to be blown by the fan unit 10 and the other rack. It is calculated using the maximum value of the heat generation amount of the rack 2 included in the row.

  The instruction transmission unit 202 transmits the generated instruction to the control unit 13 of the fan unit 10 (step S15 in FIG. 8).

  For example, when the temperature of the back side thermometer 22 is higher than the upper limit value of a first predetermined range (for example, 25 ° C. to 35 ° C.), the instruction transmission unit 202 is attached to the rack 2 in which the back side thermometer 22 is installed. An instruction to increase the rotational speed of the blower 11 of the corresponding fan unit 10 is transmitted to the control unit 13 of the fan unit 10.

  Thereby, the control apparatus 20 can increase the quantity of the cool air C1 ventilated to the rack 2 which is discharging | emitting the warm air W1 of temperature higher than a predetermined value.

  In addition, the instruction transmission unit 202 is, for example, a rack in which the front side thermometer 21 is installed when the temperature of the front side thermometer 21 is higher than an upper limit value of a second predetermined range (for example, 15 ° C. to 25 ° C.). An instruction to increase the rotational speed of the blower 11 of the fan unit 10 corresponding to 2 is transmitted to the control unit 13 of the fan unit 10.

  Thereby, the control apparatus 20 can increase the quantity of the cool air C1 in the position where the temperature of the cool air C1 is higher than a predetermined value.

  In addition, the instruction transmission unit 202 is installed when, for example, the temperature of the back side thermometer 22 is lower than the lower limit value of the first predetermined range (for example, 25 ° C. to 35 ° C.). An instruction to lower the rotational speed of the blower 11 of the fan unit 10 corresponding to the rack 2 is transmitted to the control unit 13 of the fan unit 10.

  Thereby, the control apparatus 20 can reduce the ventilation volume of the cool air C1 with respect to the rack 2 with the small discharge | emission amount of the warm air W1, ie, the operation rate of an electronic device apparatus is small.

  In addition, the instruction transmission unit 202, for example, the rack in which the front side thermometer 21 is installed when the temperature of the front side thermometer 21 is lower than a lower limit value of a second predetermined range (for example, 15 ° C. to 25 ° C.). An instruction to reduce the rotational speed of the blower 11 of the fan unit 10 corresponding to 2 is transmitted to the control unit 13 of the fan unit 10.

  Thereby, the supply amount of the cold air C1 can be controlled to an appropriate amount.

  Thereafter, the control unit 13 of the fan unit 10 controls the rotational speed of the blower 11 based on the instruction transmitted from the control device 20. Specifically, the control unit 13 controls the rotation speed of the blower 11 by controlling the frequency of the blower 11. In addition, the control method of the rotation speed of the air blower 11 is not limited to controlling the frequency, and any method may be used.

  In addition, in this Embodiment, although the control part 13 matched with each air blower 11 demonstrated that it controlled the rotation speed of the air blower 11 based on the control apparatus 20, the control apparatus 20 controlled each air blower 11. You may control.

  As the rotational speed of the blower 11 increases, the supply amount of the cool air C1 also increases. Therefore, the amount of air returning to the chamber 3 through the suction slit 5 also increases. On the contrary, when the rotation speed of the blower 11 decreases, the supply amount of the cool air C1 decreases and the amount of air returning to the chamber 3 also decreases. Thus, by controlling the rotation speed of the blower 11, the air conditioning system 100 can adjust the amount of air circulating in the air-conditioned room 1.

  Each blower 11 may be set to belong to any of a plurality of groups. And the control apparatus 20 may transmit the instruction | indication which controls the air blower 11 contained in this group per this group. For example, a case will be described in which a plurality of adjacent racks 2 belong to one group, and among the plurality of racks 2, the temperature of the front-side thermometer 21 of a certain rack 2 is higher than an upper limit value in a predetermined range. At this time, the control device 20 may control not only the certain rack 2 but also the temperature of the adjacent racks 2 by controlling to increase the rotation speed of the blowers 11 belonging to this group. As a result, the control device 20 causes the temperature of the rack 2 adjacent to a certain rack 2 to be higher than the upper limit value of the predetermined range or close to the upper limit value of the predetermined range. The temperature can also be controlled.

(Example of temperature distribution in air-conditioned room 1)
Next, an example of the temperature distribution in the air-conditioned room 1 when the amount of air in the air-conditioned room 1 is adjusted using the air-conditioning system 100 according to the present embodiment will be described. FIG. 9 is a diagram illustrating an example of a temperature distribution in the air-conditioned room 1 that is air-conditioned using the air-conditioning system 100 according to the present embodiment. In FIG. 9, the temperature distribution at the time of seeing the air-conditioned room 1 which concerns on this Embodiment from the upper surface is shown. In the air-conditioned room 1 in FIG. 9, 12 racks are arranged in one rack row. Moreover, the air-conditioned room 1 in FIG. 9 includes 18 rack rows. For convenience of explanation, the description of the fan unit 10 is omitted in FIG.

  Moreover, in FIG. 9, the code | symbol CA1 has shown cold aisle and the code | symbol HA1 has shown hot aisle. In the air conditioning system 100, as shown in FIG. 9, the racks 2 are arranged so that cold aisles and hot aisles are alternately formed in the paths between the rack rows.

  The suction slit 5 is provided so as to be substantially perpendicular to the hot aisle on the floor plane (xz-axis plane) of the air-conditioned room 1. The cooling device 51 is disposed so as to be substantially parallel to the suction slit 5 so as to efficiently cool the air through the suction slit 5.

  Further, in FIG. 9, a darker color indicates that the temperature is low, and that the temperature is higher as it approaches white.

  As shown in FIG. 9, it can be seen that each cold aisle CA1 has a temperature of approximately 25 ° C. or lower.

  10 is a view taken along the line CC of FIG. FIG. 10 shows the temperature distribution of the hot aisle HA1, and shows the temperature distribution in the air-conditioned room 1 when viewed from the back surface 2b side of the rack 2. FIG. For convenience of explanation, the description of the fan unit 10 is omitted in FIG.

  The air sucked into the rack 2 is warmed by the electronic device in the rack 2, becomes warm air that is about 10 ° C. higher, and is considered to be discharged. Therefore, the air conditioning system 100 can also control the temperature of the warm air discharged from the rack 2 by controlling the temperature of the cool air sucked into the rack 2.

  As shown in FIG. 10, the air on the hot aisle HA1 in the air-conditioned room 1 is approximately 35 ° C. Thus, the air conditioning system 100 according to the present embodiment can control the temperature of warm air to be approximately 35 ° C.

  FIG. 11 is a view taken along line DD in FIG. FIG. 11 shows the temperature distribution of the cold aisle CA1, and shows the temperature distribution in the air-conditioned room 1 when viewed from the front surface 2a side of the rack 2. FIG. For convenience of explanation, the description of the fan unit 10 is omitted in FIG.

  As shown in FIG. 11, it can be seen that the cold air cooled by the cooling device 51 and passed through the chamber 3 flows into the cold aisle in the air-conditioned room 1 at about 25 ° C. Thus, the air conditioning system 100 according to the present embodiment can control the temperature of the cold air to about 25 ° C.

(About hardware configuration)
The hardware configuration of the design apparatus 30 illustrated in FIG. 5 and the control apparatus 20 and the control unit 13 illustrated in FIG. 7 will be described. The design apparatus 30 illustrated in FIG. 5 and the control apparatus 20 and the control unit 13 illustrated in FIG. 7 may be realized by the hardware resources illustrated in FIG. 12 includes a RAM (Random Access Memory) 101, a ROM (Read Only Memory) 102, a communication interface 103, a storage medium 104, a CPU (Central Processing Unit) 105, an input device 106, and an output device 107. .

  The input device 106 is realized by, for example, a mouse, a keyboard, a built-in key button, or a touch panel, and is used for an input operation. For example, the input device 106 is a device that inputs necessary information for determining the arrangement of the fan units 10.

  The output device 107 is realized by a display, for example, and is used for confirming the output. The output device 107 is, for example, a display that can confirm the temperature distribution described with reference to FIGS. 9 to 11.

  The CPU 105 controls the overall operation of the design device 30, the control device 20, and the control unit 13 by reading various software programs (computer programs) stored in the ROM 102 or the storage medium 104 into the RAM 101 and executing them. That is, in the present embodiment, the CPU 105 refers to the ROM 102 or the storage medium 104 as appropriate, and each function (each unit) included in the design device 30, each function (each unit) included in the control device 20, and the function of the control unit 13. Execute the software program to be executed.

  Further, in the present invention described by taking this embodiment as an example, the computer program capable of realizing the functions described above is supplied to the design device 30, the control device 20, and the control unit 13, and then the computer program is This is achieved by the CPU 105 reading it into the RAM 101 and executing it.

  The supplied computer program may be stored in a computer-readable storage device such as a readable / writable memory (temporary storage medium) or a hard disk device. In such a case, the present invention can be understood as being configured by a code representing the computer program or a storage medium storing the computer program.

  In the above-described embodiment, each block in the design device 30 shown in FIG. 5, each block in the control device 20 shown in FIG. 7, and the function shown in the control unit 13 are executed by the CPU 105 shown in FIG. 12 as an example. The case where it is realized by a software program has been described. However, some or all of the functions shown in the blocks shown in FIGS. 5 and 7 may be realized as a hardware circuit.

  In the present embodiment, the control device 20 and the design device 30 may be realized by different devices, or may be realized by one information processing device. Further, in the present embodiment, the description will be given by taking as an example that the suction slit 5 and the cooling device 51 are provided on one end side of the hot aisle (one direction out of the directions substantially parallel to the hot aisle). Although performed, it may be provided also on the other end side. By providing the suction slit 5 and the cooling device 51 on both sides of the hot aisle, the air-conditioned room 1 can be air-conditioned more efficiently.

(effect)
According to air conditioning system 100 according to the present embodiment, it is possible to reduce power consumption and further reduce costs. This is because the warm air W1 discharged from the rack 2 passes through the suction slit 5 and is cooled by the cooling device 51. Then, the cool air C1 cooled by the cooling device 51 is blown into the air-conditioned room 1 from the blower 11, and the cool air C1 blown by the blower 11 is sucked into the rack 2 from the front surface 2a of the rack 2. .

  Thereby, the air conditioning system 100 can perform air conditioning without being affected by the wiring, unlike the air conditioning system using the space under the floor where the wiring of the device is arranged. Thereby, the air-conditioning system 100 can reduce power consumption compared with the air-conditioning system using the space under the floor where the wiring of an apparatus is arrange | positioned.

  Moreover, since it is not necessary to construct the space under the floor and the ceiling space is only the chamber 3, the installation cost is lower than the case where the ceiling space described in Japanese Patent Application No. 2014-148951 has a double structure. Can be lowered. Further, the air conditioning system 100 according to the present embodiment is constructed even if the height of the room required for construction is lower than when constructing a space under the floor or when the ceiling space has a double structure. be able to. Thereby, the air conditioning system 100 which concerns on this Embodiment can be constructed | assembled also with respect to the existing building. Thus, since the air conditioning system 100 according to the present embodiment can use an existing building, it is possible to reduce the cost for construction. The air conditioning system 100 according to the present embodiment can also be suitably applied to existing buildings.

  In addition, the air conditioning system 100 according to the present embodiment includes one or more airflows determined based on at least one of the air volume required by the pair of opposing racks 2 and the airflow required by the plurality of rack groups. One blower 11 is provided for the rack set. Thereby, the air conditioning system 100 which concerns on this Embodiment can adjust the quantity of the cool air C1 which blows on the rack 2 according to the number and operation rate of the electronic device apparatus mounted in the rack 2. FIG. Therefore, the air conditioning system 100 according to the present embodiment can more suitably reduce power consumption for air conditioning. In addition, as described above, the air conditioning system 100 according to the present embodiment is more cost effective than arranging the fans 11 for all the racks 2 by disposing the optimized number of fans 11. Can be reduced.

<Second Embodiment>
Next, a second embodiment of the present invention will be described with reference to FIG. In the present embodiment, it will be described that the control device 20 and the design device 30 described in the first embodiment are realized by one device.

  FIG. 13 is a diagram for explaining the concept of the air conditioning system 200 according to the present embodiment. For convenience of explanation, members having the same functions as those included in the drawings described in the first embodiment described above are given the same reference numerals, and descriptions thereof are omitted.

  The air conditioning system 200 according to the present embodiment is an air conditioning system that performs air conditioning of the air-conditioned room 1 in which the rack 2 on which an electronic device (not shown) is mounted. As shown in FIG. 13, in the air conditioning system 200, a supply passage (chamber 3) for supplying air to the air-conditioned room 1 is formed in the ceiling space of the air-conditioned room 1.

  In addition, a suction port (suction slit 5) for sending air from the air-conditioned room 1 to the ceiling space is provided between the air-conditioned room 1 and the ceiling space where the chamber 3 is formed.

  The ceiling plate 4 of the air-conditioned room 1 is provided with an opening 4a.

  The air conditioning system 200 includes a cooling device 51 that cools the air (warm air W1) that is discharged from the back surface 2b of the rack 2 and flows into the ceiling space through the suction slit 5 and discharges the cool air C1 to the chamber 3. ing. Furthermore, the air conditioning system 200 includes a blower 11 that is provided in the opening 4a and supplies cold air C1 that has passed through the chamber 3 to the air-conditioned room.

  The blower 11 is provided in the rack 2 so that the cold air C1 is sucked into the suction surface (front surface 2a) on the side of sucking the cold air C1.

  The air conditioning system 200 includes a calculation unit 210, a determination unit 220, and a control unit 230. The calculation unit 210 corresponds to the calculation unit 301 according to the first embodiment. The calculation unit 210 requires an air volume required by a rack set including a pair of racks 2 arranged at a predetermined interval so that the front surfaces 2a face each other and / or a plurality of rack sets. Calculate the air volume. Specifically, the calculation unit 210 includes the first heat amount generated from one rack 2 included in the rack set, the second heat amount generated from the other rack 2, and information on the environment in which the rack 2 is disposed. Based on the above, the air volume is calculated.

  The determination unit 220 corresponds to the determination unit 302 according to the first embodiment. The determination unit 220 determines the position and number of the racks 2 in which the blower 11 is arranged based on the air volume calculated by the calculation unit 210. And the air blower 11 is provided with respect to this determined 1 or several rack group.

  The control unit 230 has the functions of the instruction transmission unit 202 and the control unit 13 according to the first embodiment. Based on the temperature of the air discharged from the rack 2 and the temperature of the air sucked into the rack 2, which is transmitted from the thermometer (T1 to T3 in FIG. 13), the control unit 230 2 is controlled.

  Thereby, the warm air W <b> 1 discharged from the rack 2 passes through the retan chamber 6 and is cooled by the cooling device 51. Then, the cool air C <b> 1 is blown into the air-conditioned room 1 from the blower 11 through the duct 12. The blower 11 whose rotation speed is controlled by the control unit 230 blows the cool air C1, and the cool air C1 is sucked into the rack 2 from the front surface 2a of the rack 2.

  Note that the calculation unit 210, the determination unit 220, and the control unit 230 illustrated in FIG. 13 may be realized by one information processing device in the air conditioning system 100, or may be realized by different devices. It may be. In addition, the calculation unit 210, the determination unit 220, and the control unit 230 illustrated in FIG. 13 are realized by the hardware resources illustrated in FIG. 12, similarly to the control device 20 and the design device 30 according to the first embodiment described above. It may be done.

  Thus, unlike the above-described first embodiment, the air conditioning system 200 performs air conditioning without being affected by the wiring, unlike the air conditioning system using the space under the floor where the wiring of the device is arranged. be able to. Therefore, the air conditioning system 200 according to the present embodiment can efficiently cool the rack 2 with lower power.

<Third Embodiment>
Next, a third embodiment of the present invention will be described with reference to FIG. In this embodiment, a minimum configuration that solves the problems of the present invention will be described.

  FIG. 14 is a diagram for explaining the concept of air conditioning system 300 according to the present embodiment. For convenience of explanation, members having the same functions as those included in the drawings described in the first or second embodiment described above are given the same reference numerals, and descriptions thereof are omitted.

  The air conditioning system 300 according to the present embodiment is an air conditioning system that performs air conditioning of the air-conditioned room 1 in which the rack 2 on which an electronic device (not shown) is mounted. As shown in FIG. 14, in the air conditioning system 300, a supply passage (chamber 3) for supplying air to the air-conditioned room 1 is formed in the ceiling space of the air-conditioned room 1.

  In addition, a suction port (suction slit 5) for sending air from the air-conditioned room 1 to the ceiling space is provided between the air-conditioned room 1 and the ceiling space where the chamber 3 is formed.

  The ceiling plate 4 of the air-conditioned room 1 is provided with an opening 4a.

  The air conditioning system 300 includes a cooling device 51 that cools air (warm air W <b> 1) that is discharged from the rack 2 and flows into the ceiling space through the suction slit 5 and discharges cool air C <b> 1 to the chamber 3. Furthermore, the air conditioning system 300 includes a blower 11 that is provided in the opening 4a and supplies the cold air C1 that has passed through the chamber 3 to the air-conditioned room.

  The blower 11 is provided in the rack 2 so that the cold air C1 is sucked into the suction surface (front surface 2a) on the side of sucking the cold air C1. The blower 11 has at least an air volume required by a rack set including a pair of racks 2 arranged at a predetermined interval so that the front surfaces 2a face each other, and an air volume required by a plurality of rack sets. It is provided for one or a plurality of rack sets determined based on any one of them.

  Thereby, unlike the first embodiment described above, the air conditioning system 300 performs air conditioning without being affected by the wiring, unlike the air conditioning system using the space under the floor where the wiring of the device is arranged. be able to. In addition, since there is no space under the floor or a double-structured ceiling space, costs can be reduced.

  Thereby, the air conditioning system 300 according to the present embodiment can efficiently cool the rack 2 with lower power and can further reduce the cost.

  Each of the above-described embodiments is a preferred embodiment of the present invention, and the scope of the present invention is not limited only to the above-described embodiments, and those skilled in the art do not depart from the gist of the present invention. However, it is possible to construct a form in which various modifications are made by correcting or substituting the above-described embodiments.

DESCRIPTION OF SYMBOLS 1 Air-conditioned room 2 Rack 3 Chamber 4 Ceiling board 5 Suction slit 8 Wall 9 Corridor 10 Fan unit 11 Blower 13 Control part 20 Control apparatus 21 Front side thermometer 22 Back side thermometer 201 Storage part 202 Instruction transmission part 30 Design apparatus 301 Calculation unit 302 Determination unit 41 Humidifier 51 Cooling device 100 Air conditioning system 101 RAM
102 ROM
103 Communication Interface 104 Storage Medium 105 CPU
DESCRIPTION OF SYMBOLS 106 Input device 107 Output device 200 Air conditioning system 210 Calculation part 220 Determination part 230 Control part 300 Air conditioning system 1a Partition 2a Front surface 2b Rear surface 4a Opening C1 Cold air W1 Warm air CA1 Cold aisle HA1 Hot aisle

Claims (11)

An air conditioning system that air-conditions an air-conditioned room in which a rack equipped with an electronic device is installed,
A supply passage for supplying air to the air-conditioned room is formed in the ceiling space of the air-conditioned room,
The ceiling plate of the air-conditioned room is provided with an opening,
Between the air-conditioned room and the ceiling space, a suction port for sending air from the air-conditioned room to the ceiling space is provided,
A cooling device that cools air that is discharged from the rack and flows into the ceiling space through the suction port, and discharges cool air to the supply passage;
A blower that is provided in the opening and supplies the cold air that has passed through the supply passage to the air-conditioned room,
The blower is provided so that the cold air is sucked into a suction surface of the rack that sucks the cold air,
Further, the blower requires an air volume required by a rack set including a pair of racks arranged at a predetermined interval so that the suction surfaces face each other, and a plurality of rack sets. An air conditioning system, which is provided for one or a plurality of rack sets determined based on at least one of the air volumes. Calculating means for calculating the air volume;
Determining means for determining the arrangement of the blower,
The calculating means is based on the first heat amount generated from one rack included in the rack set, the second heat amount generated from the other rack, and information on the environment in which the rack is arranged. Calculate the air volume,
2. The air conditioning system according to claim 1, wherein the determining unit determines the position and the number of the racks on which the blower is arranged based on the air volume calculated by the calculating unit. Further comprising control means for controlling each of the blowers,
The control means controls the number of rotations of the blower related to the rack based on at least one of a temperature of air discharged from the rack and a temperature of air sucked into the rack. The air conditioning system according to claim 1 or 2.   The control means includes a condition that the temperature of the air discharged from the rack is higher than an upper limit value of a first predetermined range, and the temperature of the air sucked into the rack is higher than an upper limit value of a second predetermined range. The air conditioning system according to claim 3, wherein when at least one of the conditions of high is satisfied, the rotational speed of the blower related to the rack is increased.   The control means includes a condition that the temperature of the air discharged from the rack is lower than a lower limit value of a first predetermined range, and the temperature of the air sucked into the rack is lower than a lower limit value of a second predetermined range. 5. The air conditioning system according to claim 3, wherein when at least one of a low condition is satisfied, the number of rotations of the blower associated with the rack is decreased.   The air conditioning system according to claim 1, wherein the cooling device is a dry coil. A program to be executed by a design device that determines the arrangement of a blower in the air conditioning system according to any one of claims 1 to 6,
A first heat amount generated from one rack included in a rack set arranged with a predetermined interval so that the suction surfaces of the racks face each other; a second heat amount generated from the other rack; Processing for calculating the air volume required by one or a plurality of the rack sets based on the information on the environment in which the racks are arranged;
A program for executing, based on the calculated air volume, a process for determining the position and number of the racks to which the blower blows cool air. A determination method for determining arrangement of a blower in the air conditioning system according to any one of claims 1 to 6,
A first heat amount generated from one rack included in a rack set arranged with a predetermined interval so that the suction surfaces of the racks face each other; a second heat amount generated from the other rack; Based on the information on the environment in which the rack is arranged, the air volume required by one or a plurality of the rack sets is calculated,
A determination method characterized by determining the position and number of the racks to which the blower blows cool air based on the calculated air volume. A program that is executed by a control device that controls a blower in the air conditioning system according to any one of claims 1 to 6,
Processing for obtaining the temperature of air discharged from the rack and the temperature of air sucked into the rack;
And a process for controlling the rotational speed of the blower related to the rack based on the temperature. A method for controlling a blower in an air conditioning system according to any one of claims 1 to 6,
Obtain the temperature of the air exhausted from the rack and the temperature of the air sucked into the rack,
A control method, comprising: controlling a rotation speed of the blower related to the rack based on the temperature.   A computer-readable recording medium that stores the program according to claim 7 or 9.