JP2014199151A - Air conditioning system, air conditioning method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to appropriately adjust the air volume of a channel in which the air for cooling equipment flows.SOLUTION: An air conditioning system, in which a double floor for installing equipment thereon is provided, the air conditioner supplies cooling air to an underfloor space of the double floor, the cooling air in the underfloor space is supplied to a first channel for causing the cooling air to flow on a floor surface of the double floor from the underfloor space of the double floor via an opening of the floor surface of the double floor, the cooling air supplied to the first channel cools an interior of the equipment and is discharged as hot air, and the discharged hot air returns to the air conditioner via a second channel, comprises: air pressure detection means for detecting an air pressure in the first channel; determination means for determining whether the detected air pressure is a pressure in a predetermined range; and control means for controlling an air volume of the air conditioner on the basis of a result of the determination.

Description

  The present invention relates to an air conditioning system, an air conditioning method, and a program.

There is a machine room in which storage racks (rack) in which devices such as servers and communication devices are arranged form a row (storage rack), and a plurality of storage racks are arranged. In such an air conditioning system in a machine room, it is necessary to efficiently cool the devices arranged in the respective storage racks. The machine room is made into a double floor, and air conditioning is performed in the space under the double floor. In some cases, the cool air from the machine is supplied and the hot air discharged from the storage rack and the cool air are separated from each other so as not to run around each other. The cold air from the air conditioner in such a machine room is supplied to the storage rack via the underfloor space of the double floor, and the air in the storage rack is cooled and heated (hot air) from the storage rack. It is discharged (see, for example, Patent Document 1).
In the air conditioning system according to Patent Literature 1, in order to cool the apparatus more efficiently, an upper shielding plate and a passage covering a space (cold aisle) between accommodation rows opposed to each other with a passage interposed therebetween are covered. It is closed by a shielding member (aisle capping) including an end shielding plate that covers the end of each of the two. By filling the closed space with cool air to form a cool air flow path, the cool air filled in the space is efficiently supplied to the storage rack to enhance the cooling effect of the apparatus.

In such a cold aisle, if there is a difference between the amount of cold air supplied and the amount of hot air discharged, the hot air exhausted from the containment rack is passed through the gap between the isle capping to the cold aisle. Inflow or cold outflow from the cold aisle may occur. In such a case, there is a possibility that the cooling efficiency is lowered or the amount of cold air supplied is insufficient, leading to a high temperature failure of a device such as a server or a communication device.
In order to avoid such a situation, a temperature sensor disposed in an opening provided in a cold aisle shielding plate, a temperature sensor disposed in a cold aisle space (or an air conditioner outlet temperature sensor), hot A technique for adjusting the air volume of an air conditioner according to a measured value of a temperature detected by a temperature sensor or the like disposed in an aisle space is disclosed (for example, see Patent Document 2).

Japanese Patent No. 3833515 JP 2009-257730 A

  If excessive cold air supply to the cold aisle occurs due to air volume control of an air conditioner or the like, or if the exhaust capacity from the cold aisle becomes excessive, the pressure difference inside and outside the cold aisle will increase, There may be a problem that the load on the exhaust fan to be exhausted increases or excessive distortion occurs in the shielding plate.

  In view of the above problems, an object of the present invention is to provide an air conditioning system, an air conditioning method, and a program capable of appropriately adjusting the air volume of a flow path for flowing air for cooling equipment.

[1] The air conditioning system according to the first aspect of the present invention has a double floor where equipment is installed, and the air conditioner supplies cooling air to the underfloor space of the double floor, Cooling air is supplied from the underfloor space of the double floor to the first flow path for flowing the cooling air on the floor surface through the opening of the floor surface of the double floor, In the air conditioning system, the supplied cooling air cools the inside of the device and is discharged as hot air, and the discharged hot air is returned to the air conditioner through a second flow path. An atmospheric pressure detection means for detecting the atmospheric pressure in the first flow path, a determination means for determining whether or not the detected atmospheric pressure is a pressure within a predetermined range, and an air conditioner based on the result of the determination And a control means for controlling the air volume.

[2] The air conditioning system according to the first aspect of the present invention includes dew point temperature detecting means for detecting dew point temperature in the underfloor space of the double floor, and the control means is configured to adjust the detected dew point temperature. Accordingly, the air volume of the air conditioner is controlled so as not to cause condensation in the space under the double floor.

[3] In the air conditioning system according to the first aspect of the present invention, the control means determines, by the determination, that the detected atmospheric pressure is equal to or higher than a first predetermined pressure value that defines the predetermined range. In this case, the air volume is lowered by a certain amount with respect to the air volume set in the air conditioner.

[4] In the air conditioning system according to the first aspect of the present invention, the control means determines, by the determination, that the detected atmospheric pressure is equal to or less than a pressure value in a second predetermined range that defines the predetermined range. In this case, the air volume is increased by a certain amount with respect to the air volume set in the air conditioner.

[5] The air conditioning system according to the first aspect of the present invention includes a temperature sensor that detects a temperature of the cooling air blown from the air conditioner, and the control means is a cooling blown from the air conditioner. The temperature of the cooling air is controlled so that the temperature of the working air becomes higher than the dew point temperature.

[6] The air conditioning system according to the first aspect of the present invention is characterized by comprising dehumidifying means for dehumidifying so that a dew point temperature under the double floor is lower than a preset dew point temperature.

[7] In the air conditioning system according to the first aspect of the present invention, after the control unit performs the control to change the operating state of the air conditioner, a certain time has passed since the control was performed. It is characterized by detecting a case where a difference between a measurement result of the atmospheric pressure detection unit and a measurement result of the atmospheric pressure detection unit detected before the control is performed is smaller than a predetermined value.

[8] Moreover, the air conditioning method according to the second aspect of the present invention includes a double floor on which equipment is installed, the air conditioner supplies cooling air to the underfloor space of the double floor, and the underfloor The cooling air for the space is supplied from the underfloor space of the double floor to the first flow path for flowing the cooling air on the floor surface through the opening of the floor surface of the double floor, and the first flow Air in the air conditioning system in which the cooling air supplied to the passage cools the device and is discharged as hot air, and the discharged hot air is returned to the air conditioner through the second flow path. A harmony method comprising: detecting an atmospheric pressure in the first flow path; determining whether the detected atmospheric pressure is within a predetermined range; and an air conditioner based on the determination result. And a step of controlling the air volume.
[9] Further, the program according to the third aspect of the present invention has a double floor on which equipment is installed, an air conditioner supplies cooling air to the underfloor space of the double floor, Cooling air is supplied from the underfloor space of the double floor to the first flow path for flowing the cooling air on the floor surface through the opening of the floor surface of the double floor, A computer provided in an air conditioning system in which the supplied cooling air cools the device and is discharged as hot air, and the discharged hot air is returned to the air conditioner through a second flow path. Detecting the atmospheric pressure in the first flow path; determining whether the detected atmospheric pressure is within a predetermined range; and controlling the air volume of the air conditioner based on the determination result. Is a program for executing steps.

  The present invention can provide an air-conditioning system, an air-conditioning method, and a program that can appropriately adjust the air volume of a flow path for flowing air for cooling equipment.

It is a perspective view showing a schematic structure of air harmony system 100 of a 1st embodiment. It is a longitudinal section showing air harmony system 100 which is one mode of this embodiment. It is a block diagram of the air conditioning system 100 in this embodiment. It is a flowchart which shows the process of the air conditioning system in this embodiment. It is a longitudinal section showing air conditioning system 100A which is one mode of the 2nd embodiment. It is a block diagram of 100 A of air conditioning systems in this embodiment. It is a flowchart which shows the process of the air conditioning system in this embodiment. It is a longitudinal cross-sectional view which shows the air conditioning system 100B which is one implementation of 3rd Embodiment. It is a block diagram of the air conditioning system 100B in this embodiment. It is a flowchart which shows the process of the air conditioning system in this embodiment. It is a longitudinal section showing air conditioning system 100C which is one mode of a 4th embodiment. It is a block diagram of the air conditioning system 100C in this embodiment. It is a flowchart which shows the process of the air conditioning system in this embodiment.

  Embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same components, and the description may be omitted. In addition, some configurations may be added or omitted.

<First Embodiment>
FIG. 1 is a perspective view showing a schematic configuration of an air conditioning system 100 of the present embodiment. In the following description, in the horizontal plane, the width direction of the passage 4 described later will be described as the X direction, the longitudinal direction as the Y direction, and the vertical direction as the Z direction.

  As shown in FIG. 1, the air conditioning system 100 of this embodiment is utilized in the machine room 101 formed, for example in substantially box shape. The machine room 101 is surrounded by the floor 1, a wall and a ceiling (not shown). A double floor 2 is provided spaced upward from the floor 1, and an underfloor space 5 is provided below the double floor 2. A passage (interval) 4 extending in one direction (Y-axis direction) on the double floor is formed. The passage 4 is formed with a large number of blowing holes 8 penetrating into the underfloor space 5. The underfloor space 5 under the floor and the space of the passage 4 are communicated with each other through a blowout hole 8.

Next, the air conditioning system 100 used in the machine room 101 will be described.
The air conditioning system 100 includes a structure body (hereinafter simply referred to as a rack (accommodation rack)) 3, an air conditioner (air conditioning apparatus) 6, And a regulating unit 10 to be described later for regulating the flow.

  The rack 3 is formed in a substantially rectangular parallelepiped box shape and accommodates various devices such as a communication device. A plurality of these racks 3 are arranged on both sides in the width direction (X-axis direction) of the passage 4 along the longitudinal direction (Y-axis direction) of the passage 4. The rack 3 takes in the air in the space of the passage 4 from an air supply port (not shown) formed on the opposing surfaces (front surface 3b) facing each other. The taken-in air is discharged upward or rearward (X-axis direction) from the upper surface 3a or the rear discharge port.

  The air conditioners 6 are arranged behind the racks 3 in one row (in the −X direction). The air conditioner 6 is provided with a reflux port 6a on the upper surface and a blowing port 6b for blowing cooling air A1 on the lower surface. The air conditioner 6 sucks air flowing in the upper space of the machine room 101 from the reflux port 6a, cools it, and then blows it out from the blowout port 6b.

The restriction portion 10 includes an upper shielding portion 20 (head cap) that shields the passage 4 sandwiched between the racks 3 (in the Z direction), and an end shielding portion 30 that shields the end portion of the passage 4 in the Y-axis direction. End caps, 30A, 30B).
The upper shielding part 20 is bridged between the upper surfaces 3 a of the racks 3 arranged on both sides of the passage 4 so as to cover the entire upper side of the passage 4. As a result, the passage 4 and the upper space of the rack 3 are partitioned, and the hot air A2 discharged from the upper surface 3a or the rear exhaust port of the rack 3 is restricted from flowing back to the space of the passage 4. Therefore, the space of the passage 4 is always filled with the cooling air A <b> 1 from the floor of the double floor 2 to the upper shielding part 20.

FIG. 2 is a longitudinal sectional view showing an air conditioning system 100 which is an embodiment of the present embodiment.
As shown in FIG. 2, an air conditioner 6 and a pair of racks 3 are provided on a double floor 2. One rack 3 is arranged in the X direction from the air conditioner 6 with an area labeled HA1 and further separated from an area labeled HA2 across an area labeled CA1. The other rack 3 to be paired is arranged.
A region denoted by reference sign CA1 serves as a flow path (first flow path) for supplying the cooling air A1 from the air conditioner 6 to the rack 3. Hereinafter, the area | region which attached | subjected code | symbol CA1 is called cold aisle CA1. In addition, each region denoted by reference characters HA1 and HA2 serves as a flow path (second flow path) through which the hot air discharged from the rack 3 returns to the air conditioner 6. Hereinafter, the respective regions denoted by reference characters HA1 and HA2 are referred to as hot aisle HA1 and HA2.
In the present embodiment, the cold aisle CA1 is provided with a cold aisle pressure detector 12 at a predetermined height.

FIG. 3 is a block diagram of the air conditioning system 100 in the present embodiment.
The air conditioning system 100 shown in FIG. 3 includes an air conditioner 6, a cold aisle pressure detection unit 12, an operation input unit 15, and a control device 200.

The air conditioner 6 supplies cooling air A <b> 1 for cooling the equipment to the underfloor space 5 of the double floor 2. The cold aisle CA1 in which the cooling air A1 in the underfloor space 5 of the double floor 2 flows the cooling air A1 from the underfloor space 5 of the double floor 2 through the opening of the floor surface of the double floor 2 on the floor surface. (First flow path). The cooling air A1 supplied to the cold aisle CA1 is taken into the device, cools the device, becomes hot air A2, and is discharged from the device. The discharged hot air A2 is returned to the air conditioner 6 through the hot aisles HA1 and HA2 (second flow path).
The cold aisle pressure detector 12 (atmospheric pressure detector) detects the atmospheric pressure in the first flow path.
The operation input unit 15 detects a user operation input for causing the air conditioning system 100 to function, and sends the detected operation information to the control device 200. The operation information includes operation command information for instructing operation of the air conditioner 6, determination threshold information used for processing of the control device 200, and the like.

The control device 200 controls the air volume and temperature that the air conditioner 6 blows out.
The control device 200 in this embodiment includes a storage unit 210 and a control unit 230.
The storage unit 210 includes a determination threshold storage unit 211 that stores a determination threshold, and stores a program for performing the processing of the control unit 230. The determination threshold value storage unit 211 stores “cold aisle pressure upper limit value” and “cold aisle pressure lower limit value” as determination threshold information used for processing of the control device 200.
The control unit 230 includes an aisle air pressure control unit 231, an operation input detection unit 235, an air conditioner air volume control unit 236, and an air conditioner blowout temperature control unit 237.
The aisle air pressure control unit 231 includes an aisle air pressure determination unit 232. The aisle atmospheric pressure determination unit 232 determines whether or not the atmospheric pressure detected by the cold aisle atmospheric pressure detection unit 12 is a pressure within a predetermined range.
The air conditioner air volume control unit 236 controls the air volume of the cooling air A <b> 1 blown out by the air conditioner 6 in accordance with a command from the control unit 230. For example, the command from the control unit 230 includes information for controlling the air volume of the air conditioner 6 based on the determination result by the aisle air pressure determination unit 232.
The air conditioner blowing temperature control unit 237 controls the temperature (blowing temperature) of the cooling air A1 blown out by the air conditioner 6 in accordance with a command from the control unit 230. For example, the command from the control unit 230 includes information for controlling the temperature of the air conditioner 6 based on the determination result by the aisle air pressure determination unit 232.
As described above, the air conditioner air volume control unit 236 and the air conditioner blowout temperature control unit 237 constitute control means 239 for controlling the air volume and temperature of the cooling air A1 blown out by the air conditioner 6.

FIG. 4 is a flowchart showing processing of the air conditioning system in the present embodiment.
First, the control unit 230 (air conditioner air volume control unit 236) operates the air conditioner 6 by controlling the air conditioner 6 so that a predetermined blown air volume is set in advance when the air conditioner 6 starts operation. A state is set (step S10).

  The cold aisle pressure detection unit 12 provided in the cold aisle CA1 detects the pressure PCA in the cold aisle CA1 during operation of the air conditioner 6, and the control unit 230 acquires data of the detected pressure PCA ( Step S20).

Next, the aisle atmospheric pressure determination unit 232 (determination means) determines whether or not the detected atmospheric pressure PCA is within a predetermined range of pressure, such as “cold aisle atmospheric pressure upper limit value” as shown below. (PCAmax) ”(hereinafter simply referred to as“ upper limit value ”) as a reference (first determination) and“ cold aisle pressure lower limit value (PCAmin) ”(hereinafter simply referred to as“ lower limit value ”). The determination is performed in accordance with two determination procedures of determination (second determination) as a reference.
First, as a first determination, the aisle pressure determination unit 232 determines whether or not the detected pressure PCA is equal to or higher than a predetermined upper limit (PCAmax). The upper limit value (PCAmax) is a first predetermined pressure value that defines the predetermined range. The conditions for the above determination are shown in equation (1) (step S22).

  PCA ≧ PCAmax (1)

  If it is determined in step S22 that the detected atmospheric pressure PCA is greater than or equal to a predetermined upper limit (PCAmax) (step 22: Yes), the air pressure determination unit 232 blows out the air conditioner 6. It is determined that the air flow is in a high pressure state due to excessive air flow. In order to eliminate the state where the pressure of the cold aisle is higher than the predetermined pressure, the air volume of the air conditioner 6 is decreased by a certain amount (step S24). Note that the processing in step S24 is repeated until the pressure PCA becomes less than a predetermined upper limit (PCAmax). In that case, the air volume is decreased by a certain amount.

  On the other hand, if it is determined by the determination in step S22 that the detected atmospheric pressure PCA is less than a predetermined upper limit value (PCAmax) (step 22: No), as a second determination procedure, an aisle atmospheric pressure determination is performed. The unit 232 determines whether or not the detected atmospheric pressure PCA is equal to or lower than a predetermined lower limit (PCAmin). The lower limit value (PCAmin) is a second predetermined pressure value that defines the predetermined range. The conditions for the above determination are shown in Expression (2) (step S26).

  PCA ≦ PCAmin (2)

  If it is determined by the determination that the detected atmospheric pressure PCA is equal to or lower than a predetermined lower limit (PCAmin) (step S26: Yes), the aisle internal air pressure determination unit 232 determines the amount of air blown out by the air conditioner 6. It is determined that the pressure is low due to being in a low state. In order to eliminate the state where the cold aisle pressure is lower than the predetermined pressure, the air conditioner air volume control unit 236 increases the air volume of the air conditioner 6 by a certain amount (step S28). Note that the process of step S28 is repeated until the pressure PCA becomes larger than a predetermined lower limit (PCAmin). In that case, the air volume is increased by a certain amount.

  On the other hand, when it is determined by the determination that the detected atmospheric pressure PCA is larger than a predetermined lower limit (PCAmin), that is, a second predetermined pressure value that defines the predetermined range (step S26: No), the air conditioner air volume control unit 236 controls to maintain the air volume at that time.

  In this way, the air conditioning system 100 can appropriately adjust the air volume of the cold aisle (flow path) through which the cooling air A1 for cooling the rack 3 (accommodating rack, equipment) flows.

Second Embodiment
With reference to FIGS. 5 to 7, an air conditioning system 100 </ b> A according to the present embodiment will be described. FIG. 5 is a longitudinal sectional view showing an air conditioning system 100A which is an embodiment of the present embodiment.
As shown in FIG. 5, in the underfloor space 5 in the air conditioning system 100A, a dew point temperature detection unit 13 and an air conditioner blowing temperature detection unit 14 (temperature sensor) are added to the air conditioning system 100 shown in FIG. Is further provided. The dew point temperature detection unit 13 is provided in the vicinity of the air outlet 6b of the air conditioner 6 in the underfloor space 5 or in the air conditioner 6, for example. This figure shows the former case. Note that the dew point temperature detection unit 13 may be provided in the vicinity of the blowout hole 8 through which the cooling air A1 is blown into the cold aisle CA1 in the underfloor space 5. The air conditioner outlet temperature detection unit 14 is provided in the vicinity of the outlet 6b of the air conditioner 6 in the underfloor space 5 or in the air conditioner 6, for example. This figure shows the former case.
As described above, the air conditioning system 100A in which the dew point temperature detection unit 13 and the air conditioner blowing temperature detection unit 14 are arranged does not cause condensation so that the detected blowing temperature of the air conditioner 6 is equal to or higher than the dew point temperature DT. To.

FIG. 6 is a block diagram of an air conditioning system 100A in the present embodiment.
The air conditioning system 100A shown in FIG. 6 includes an air conditioner 6, a cold aisle pressure detector 12, a dew point temperature detector 13, an air conditioner blowout temperature detector 14, an operation input unit 15, and a control device 200A.
The difference between the present embodiment and the first embodiment described above is that the air conditioning system 100A according to the present embodiment detects the blowout temperature of the air conditioner 6 and the underfloor space of the double floor 2. And a dew point temperature detecting unit 13 (dew point temperature detecting means) for detecting the dew point temperature within 5. Another difference from the first embodiment is that a control device 200A is provided instead of the control device 200.
200 A of control apparatuses in this embodiment are provided with the memory | storage part 210 and the control part 230A. The controller 230A includes an aisle air pressure controller 231A, an operation input detector 235, an air conditioner air volume controller 236, and an air conditioner blowout temperature controller 237. The aisle air pressure control unit 231A includes an aisle air pressure determination unit 232 and a dew point temperature determination unit 233. In short, the control device 200A corresponds to the control device 200, and the aisle pressure control unit 231A further includes a dew point temperature determination unit 233.

In such an air conditioning system 100 </ b> A, in addition to the first embodiment, the dew point temperature DT in the underfloor space 5 of the double floor 2 is detected by the dew point temperature detector 13, and the air conditioner blowing temperature detector 14 detects the air conditioner 6. Is detected.
200 A of control apparatuses (control part 230A) control the blowing temperature of the air conditioner 6 so that the detected blowing temperature of the air conditioner 6 becomes more than dew point temperature DT.
More specifically, the aisle air pressure control unit 231A (dew point temperature determination unit 233) determines the detected value of the dew point temperature detected by the dew point temperature detection unit 13 and the blowing temperature of the air conditioner 6 (the temperature of the cooling air A1). Compare with the detected value. The aisle air pressure control unit 231A performs temperature control of the blowout temperature of the air conditioner 6 via the air conditioner blowout temperature control unit 237 according to the comparison result.

FIG. 7 is a flowchart showing the processing of the air conditioning system in the present embodiment.
First, 200 A of control apparatuses (control part 230A) control the air conditioner 6 so that it may become a predetermined blowing air quantity at the time of the driving | operation start of the air conditioner 6. FIG.
The processing from step S10 to step S28 is the same as the processing shown in FIG.
When each processing of step S24 and step S28 is completed, and when it is determined by step S26 that the detected atmospheric pressure PCA is larger than a predetermined lower limit (PCAmin) (step S26: No) ), The dew point temperature detection unit 13 detects the dew point temperature in the underfloor space 5 of the double floor 2, and the air conditioner outlet temperature detection unit 14 detects the outlet temperature of the air conditioner (air conditioner outlet temperature). . The controller 230A acquires data of the detected dew point temperature and air conditioner outlet temperature (step S30).

  Next, control unit 230A determines whether or not the air conditioner outlet temperature is equal to or lower than the dew point temperature based on the acquired data. The conditions for the above determination are shown in Expression (3) (step S32).

  Air conditioner outlet temperature ≤ dew point temperature (3)

If it is determined in step S32 that the air conditioner outlet temperature is equal to or lower than the dew point temperature (step S32: Yes), the controller 230A sets the temperature so that the air conditioner outlet temperature is higher than the dew point temperature. The setting is made (step S34), and the processing after step S20 is performed.
On the other hand, when it is determined in step S32 that the air conditioner outlet temperature is higher than the dew point temperature (step S32: No), the control unit 230A sets the air conditioner outlet temperature to the set temperature. This is maintained (step S36), and the processing after step S20 is performed.

  In this way, the air conditioning system 100A can appropriately adjust the air volume and temperature of the cold aisle (flow path) through which the cooling air A1 that cools the rack 3 (accommodating rack, equipment) flows. Further, since the temperature of the cooling air A1 supplied from the air conditioner 6 is too low to prevent condensation, the cooling air A1 blown from the air conditioner 6 to the underfloor space 5 of the double floor 2 is below the floor. Condensation in the space 5 can prevent the equipment provided in the underfloor space 5 from being damaged or leaking to the lower floor.

<Third Embodiment>
With reference to FIGS. 8 to 10, an air conditioning system 100B in the present embodiment will be described.
FIG. 8 is a longitudinal sectional view showing an air conditioning system 100B which is an embodiment of the present embodiment.
As shown in FIG. 8, a dew point temperature detector 13 is further provided in the underfloor space 5 in the air conditioning system 100B with respect to the air conditioning system 100 shown in FIG. In the air conditioning system 100B, an air conditioner 6B is provided instead of the air conditioner 6. Dehumidifying means 9 is provided in the air conditioner 6B. For example, the dehumidifying means 9 dehumidifies the cooling air A1 during operation.
As described above, the air-conditioning system 100B in which the dew point temperature detection unit 13 and the air conditioner 6B (dehumidifying unit 9) are arranged is configured such that the detected dew point temperature DT is equal to or lower than a predetermined dew point determination threshold DTx. The dehumidifying means 9 is controlled to prevent condensation.
In the above description, the dehumidifying means 9 has been described as being provided in the air conditioner 6B. However, the dehumidifying means 9 is not limited to be provided separately from the air conditioner 6 (FIG. 2). In this case, the dehumidifying means 9 is provided, for example, in the vicinity of the air outlet 6b of the air conditioner 6, and dehumidifies the cooling air A1 in the underfloor space 5 during operation. Even if comprised in this way, the same effect can be acquired.

FIG. 9 is a block diagram of the air conditioning system 100B in the present embodiment.
The air conditioning system 100B shown in FIG. 9 includes an air conditioner 6B, a dehumidifying means 9, a cold aisle pressure detection unit 12, a dew point temperature detection unit 13, an operation input unit 15, and a control device 200B.
The difference between the present embodiment and the first embodiment described above is that the air conditioning system 100B in the present embodiment detects the dew point temperature in the underfloor space 5 of the dehumidifying means 9 and the double floor 2 and a dew point temperature detector 13. And a point provided with a control device 200B instead of the control device 200.
The control device 200B in the present embodiment includes a storage unit 210B and a control unit 230B.
The storage unit 210B includes a determination threshold storage unit 211B that stores a determination threshold, and stores a program for performing the processing of the control unit 230B. The determination threshold value storage unit 211B stores “cold aisle pressure upper limit value”, “cold aisle pressure lower limit value”, and “dew point temperature determination threshold value DTx” as determination threshold information used for processing of the control device 200B.
The control unit 230B includes an aisle air pressure control unit 231B, an operation input detection unit 235, an air conditioner air volume control unit 236, an air conditioner blowout temperature control unit 237, and a dehumidifying means control unit 238. In short, the control device 200B corresponds to the control device 200 and includes the dehumidifying means control unit 238, and the aisle air pressure control unit 231B included in the control device 200B controls the dehumidifying means control unit 238.

In such an air conditioning system 100B, in addition to the first embodiment, the dew point temperature detection unit 13 detects the dew point temperature DT in the underfloor space 5 of the double floor 2. The control device 200B (control unit 230B) controls the dehumidifying means 9 to dehumidify the underfloor space 5 of the double floor 2.
More specifically, the aisle pressure control unit 231B (dew point temperature determination unit 233) compares the detected dew point temperature detected by the dew point temperature detection unit 13 with a predetermined dew point temperature determination threshold DTx. . The aisle pressure control unit 231B controls the dehumidifying means 9 to dehumidify via the dehumidifying means control unit 238 according to the comparison result.

FIG. 10 is a flowchart showing the processing of the air conditioning system in the present embodiment.
First, the control device 200B (the control unit 230B) controls the air conditioner 6B so as to obtain a predetermined blowing air amount when the operation of the air conditioner 6B is started.

The processing from step S10 to step S28 is the same as the processing shown in FIG.
When each processing of step S24 and step S28 is completed, and when it is determined by step S26 that the detected atmospheric pressure PCA is larger than a predetermined lower limit (PCAmin) (step S26: No) ), The dew point temperature detector 13 detects the dew point temperature in the underfloor space 5 of the double floor 2. Control unit 230B acquires data of the detected dew point temperature (step S40).

  Next, control unit 230B determines whether or not the dew point temperature is equal to or lower than the dew point temperature determination threshold (DTx) based on the acquired data. The conditions for the above determination are shown in Expression (4) (step S42).

  Dew point temperature ≦ dew point temperature determination threshold DTx (4)

When it is determined in step S42 that the dew point temperature is equal to or lower than the dew point temperature determination threshold (DTx) (step S42: Yes), the control unit 230B operates the dehumidifying unit 9 so as to maintain the dew point temperature. It stops (step S44) and the process after step S20 is implemented.
On the other hand, when it is determined in step S42 that the dew point temperature is higher than the dew point temperature determination threshold (DTx) (step S42: No), the control unit 230B has the dew point temperature lower than the dew point temperature determination threshold (DTx). The dehumidifying means 9 is operated so as to be (becomes lower) (step S46), and the processing after step S20 is performed.

  In this way, the air conditioning system 100B can appropriately adjust the air volume and temperature of the cold aisle (flow path) through which the cooling air A1 that cools the rack 3 (storage rack, equipment) flows.

<Fourth embodiment>
With reference to FIGS. 11 to 13, an air conditioning system 100 </ b> C in the present embodiment will be described. FIG. 11 is a longitudinal sectional view showing an air conditioning system 100C which is an embodiment of the present embodiment. As shown in FIG. 11, the hot aisle HA2 in the air conditioning system 100C is further provided with a hot aisle pressure detector 16 as compared with the air conditioning system 100 shown in FIG. The hot aisle pressure detector 16 detects a pressure PHA in the hot aisle.

FIG. 12 is a block diagram of an air conditioning system 100C in the present embodiment.
The air conditioning system 100C shown in FIG. 12 includes an air conditioner 6, a cold aisle pressure detector 12, a hot aisle pressure detector 16, an operation input unit 15, and a control device 200C. The difference between the present embodiment and the first embodiment described above is that the air conditioning system 100C according to the present embodiment further includes a hot aisle pressure detector 16. Another difference from the first embodiment is that a control device 200C is provided instead of the control device 200.
The control device 200C in the present embodiment includes a storage unit 210C and a control unit 230C.
The storage unit 210C includes a determination threshold storage unit 211C that stores a determination threshold, and stores a program for performing the processing of the control unit 230C. The determination threshold value storage unit 211C stores “isle inside / outside air pressure difference upper limit value” and “isle inside / outside air pressure difference lower limit value” as determination threshold information used for the processing of the control device 200C.
The control unit 230C includes an aisle air pressure control unit 231C, an operation input detection unit 235, an air conditioner air volume control unit 236, and an air conditioner blowout temperature control unit 237. The aisle internal air pressure control unit 231C includes an aisle internal / external air pressure difference determination unit 232C. In short, the control device 200C is different from the control device 200 in that the aisle internal pressure control unit 231C is replaced with the aisle internal pressure control unit 231.

  In the air conditioning system 100 according to the first embodiment described above, the cold aisle pressure detection unit 12 has been described as measuring the pressure PCA in the cold aisle. However, in the air conditioning system 100C, the hot aisle pressure detection unit 16 is further configured. Measures the atmospheric pressure PHA in the hot aisle. Such an air conditioning system 100C (aisle pressure control unit 231C) controls the air volume of the air conditioner 6 based on the detected pressure PHA in the hot aisle and the pressure PCA in the cold aisle. Here, the atmospheric pressure PCA with respect to the atmospheric pressure PHA is defined as a pressure difference ΔP, and the relationship is shown in Expression (5).

ΔP = PCA−PHA (5)

  For example, if it is determined from the value of the pressure difference ΔP that the atmospheric pressure PCA is higher than the atmospheric pressure PHA by the upper and lower air pressure difference upper limit ΔPmax, the air volume of the air conditioner 6 is decreased. On the other hand, if it is determined from the pressure difference ΔP that the atmospheric pressure PCA is lower than the atmospheric pressure PHA and the lower limit value ΔPmin of the inside / outside air pressure difference, the air volume of the air conditioner 6 is increased. In this way, by controlling the amount of air blown out by the air conditioner 6, it is possible to control so that the difference between the pressure PCA in the cold aisle and the pressure PHA in the hot aisle does not become larger than a predetermined pressure difference.

FIG. 13 is a flowchart showing the processing of the air conditioning system in the present embodiment.
First, the control unit 230C (air conditioner air volume control unit 236) controls the air conditioner 6 so that a predetermined blown air volume is set in advance when the air conditioner 6 starts operation, thereby operating the air conditioner 6. A state is set (step S10).

Next, the cold aisle pressure detection unit 12 provided in the cold aisle CA1 detects the atmospheric pressure PCA in the cold aisle CA1 during operation of the air conditioner 6, and the control unit 230C uses the detected pressure PCA data. Obtain (step S20).
Next, the hot aisle pressure detection unit 16 provided in the hot aisle HA2 detects the pressure PHA in the hot aisle HA2 during operation of the air conditioner 6, and the control unit 230C obtains data of the detected pressure PHA. Obtain (step S21).
Next, the aisle inside / outside air pressure difference determination unit 232C (determination means) determines whether or not the detected air pressure PCA is within a predetermined range of pressure, for example, “hot aisle air pressure” as shown below. And “Aisle inside / outside air pressure difference upper limit value ΔPmax”. The aisle internal / external air pressure difference upper limit ΔPmax of the pressure difference is a predetermined value.
For example, the aisle atmospheric pressure control unit 231C determines whether or not the detected atmospheric pressure PCA is higher than the detected atmospheric pressure PHA by a pressure higher than the aisle internal / external air pressure difference upper limit value ΔPmax (a first predetermined pressure value or higher). To do. The conditions for the above determination are shown in Expression (6) (step S22A).

  PCA ≧ PHA + ΔPmax (6)

  When it is determined by the determination in step S22A that the detected atmospheric pressure PCA is higher than the detected atmospheric pressure PHA by more than the aisle internal / external atmospheric pressure difference upper limit value ΔPmax (first predetermined pressure value or more) (step 22A: In Yes), the aisle internal / external air pressure difference determination unit 232C determines that the air pressure blown out by the air conditioner 6 is in a high pressure state due to being in an excessive state. In order to eliminate the state where the pressure of the cold aisle is higher than the predetermined pressure, the air volume of the air conditioner 6 is decreased by a certain amount (step S24).

  On the other hand, when it is determined by the determination in step S22A that the detected atmospheric pressure PCA is not higher than the detected atmospheric pressure PHA by a pressure higher than or equal to the aisle internal / external atmospheric pressure difference upper limit value ΔPmax (the first predetermined pressure value or higher) (step 22A). : No), as a second determination procedure, the aisle internal / external air pressure difference determination unit 232C determines that the detected atmospheric pressure PCA is lower than the detected atmospheric pressure PHA by a lower isle internal / external air pressure difference lower limit ΔPmin (second predetermined value). Or less). The conditions for the above determination are shown in Expression (7) (step S26A).

  PCA ≦ PHA + ΔPmin (7)

  When it is determined by the determination that the detected atmospheric pressure PCA is lower than the detected atmospheric pressure PHA by a pressure lower than the lower limit ΔPmin of the inside / outside air pressure difference (below the second predetermined pressure value) (step S26A: Yes) In this case, the aisle internal / external air pressure difference determination unit 232C determines that the air pressure from the air conditioner 6 is in a low pressure state due to an excessively small amount of air. In order to eliminate the state where the cold aisle pressure is lower than the predetermined pressure, the air conditioner air volume control unit 236 increases the air volume of the air conditioner 6 by a certain amount (step S28).

  On the other hand, when it is determined by the above determination that the detected atmospheric pressure PCA is not lower than the detected atmospheric pressure PHA by a pressure lower than the lower limit ΔPmin of the inside / outside air pressure difference (below the second predetermined pressure value) (step S26A: No) ), The air conditioner air volume control unit 236 performs control so as to maintain the air volume at that time.

  In this way, the air conditioning system 100C can appropriately adjust the air volume of the cold aisle (flow path) through which the cooling air A1 that cools the rack 3 (accommodating rack, equipment) flows.

3 exemplifies the case where the hot aisle pressure detecting unit 16 for detecting the pressure PHA is provided in the hot aisle HA2, the hot aisle HA1 is provided above the upper shielding part 20 (FIG. 1) of the cold aisle CA1. May be. Further, the cold aisle pressure detection unit 12 and the hot aisle pressure detection unit 16 may be arranged in the vicinity with the upper shielding unit 20 (FIG. 1) and the end shielding unit 30 (FIG. 1) interposed therebetween.
The control method for controlling the air volume of the air conditioner 6 shown in this embodiment, that is, the control method based on the pressure difference ΔP between the pressure PHA in the hot aisle and the pressure PCA in the cold aisle is described in the second embodiment. You may apply to a form and 3rd Embodiment.

As shown in the above embodiment, in the air conditioning system 100 (100A, 100B, 100C), there is a double floor 2 in which the rack 3 is installed, and the air conditioner 6 is located in the underfloor space 5 of the double floor 2. (Air conditioner) supplies the cooling air A1, and the cooling air A1 of the underfloor space 5 passes from the underfloor space 5 of the double floor 2 through the opening of the floor surface of the double floor 2. It is supplied to the first flow path (cold aisle) through which the cooling air A1 flows on the floor surface. The cooling air A1 supplied to the first flow path cools the inside of the rack 3 and is discharged as hot air A2, and the discharged hot air A2 passes through the second flow path (hot aisle). It returns to the air conditioner 6.
The cold aisle pressure detection unit 12 (atmospheric pressure detection means) in the air conditioning system 100 (100A, 100B, 100C) detects the atmospheric pressure in the first flow path. The controller 230 (230A, 230B) determines whether or not the detected atmospheric pressure is a pressure within a predetermined range. The control means 239 controls the air volume of the air conditioner 6 (6B) based on the determination result.
Thereby, the air conditioning system 100 (100A, 100B, 100C) can adjust appropriately the air volume of the flow path which flows the cooling air A1 which cools the rack 3 (accommodation rack, apparatus).

  As mentioned above, although embodiment of this invention was described, the air conditioning system 100 (100A, 100B, 100C) mentioned above and the control apparatus 200 (200A, 200B, 200C) have a computer system inside. A series of processes related to the above-described process is stored in a computer-readable recording medium in the form of a program, and the above-described process is performed by the computer reading and executing this program. That is, in the air conditioning system 100 (100A, 100B, 100C) and the control device 200 (200A, 200B, 200C), the central processing unit such as a CPU executes the above program in a main storage device such as a ROM or RAM. This is realized by reading and executing information processing and arithmetic processing. Here, the computer system includes a CPU, various memories, an OS, and hardware such as peripheral devices.

Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, it also includes those that hold a program for a certain period of time, such as a volatile memory inside a computer system serving as a server or client in that case. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

As mentioned above, although embodiment of this invention was described, the air conditioning system 100 (100A, 100B, 100C) and the control apparatus 200 (200A, 200B, 200C) of this invention are limited only to the above-mentioned example of illustration. However, it goes without saying that various changes can be made without departing from the scope of the present invention.
For example, the control device 200 (200A, 200B, control means) performs the control to change the operation state of the air conditioner 6, and then performs the control of the cold aisle pressure detection unit 12 at the time when a certain time has passed since the control was performed. You may make it detect the case where the difference of a measurement result and the measurement result of the said cold aisle pressure | pressure detection part 12 detected before implementing the said control is less than a predetermined value defined beforehand.
The control device 200C (control means) performs the control to change the operation state of the air conditioner 6, and then the measurement result of the cold aisle pressure detection unit 12 and the hot aisle pressure at the time when a certain time has elapsed since the execution of the control. The difference between the pressure difference ΔP from the measurement result of the detection unit 16 and the pressure difference ΔP between the measurement result of the cold aisle pressure detection unit 12 and the measurement result of the hot aisle pressure detection unit 16 detected before the control is performed. However, it may be detected that the number is smaller than a predetermined value.
In the fourth embodiment, as shown in FIG. 11, a hot aisle pressure detector 16 is further provided in the hot aisle HA2 (or HA1), and the detected pressure PHA in the hot aisle and the cold aisle Although the aspect which controls the air volume of the air conditioner 6 based on the atmospheric pressure difference with the atmospheric pressure PCA has been shown, instead of the atmospheric pressure PHA in the hot aisle, the atmospheric pressure outside the cold aisle CA1 or the outside of the machine room 101 The air volume of the air conditioner 6 may be controlled using the atmospheric pressure.

100, 100A, 100B, 100C air conditioning system,
200, 200A, 200B, 200C control device,
230, 230A, 230B, 230C control unit (determination means),
236 air conditioner air volume control unit, 239 control means,
6, 6B air conditioner (air conditioner), 9 dehumidifying means,
12 cold aisle pressure detector (atmospheric pressure detector), 13 dew point temperature detector (dew point temperature detector)

Claims (9)

There is a double floor where equipment is installed, and an air conditioner supplies cooling air to the underfloor space of the double floor, and the cooling air of the underfloor space passes from the underfloor space of the double floor to the double floor. Is supplied to a first flow path for flowing cooling air on the floor surface through an opening in the floor surface, and the cooling air supplied to the first flow path cools the interior of the device to generate hot air. An air conditioning system in which the discharged hot air is recirculated to the air conditioner via a second flow path,
Atmospheric pressure detection means for detecting the atmospheric pressure in the first flow path;
Determination means for determining whether or not the detected atmospheric pressure is a pressure within a predetermined range;
An air conditioning system comprising: control means for controlling the air volume of the air conditioner based on the result of the determination. A dew point temperature detecting means for detecting a dew point temperature in the space under the double floor,
The control means includes
The air conditioning system according to claim 1, wherein the air volume of the air conditioner is controlled so as not to condense in the underfloor space of the double floor according to the detected dew point temperature. The control means includes
When it is determined by the determination that the detected atmospheric pressure is equal to or higher than a first predetermined pressure value that defines the predetermined range, the air volume is decreased by a certain amount with respect to the air volume set in the air conditioner. The air conditioning system according to claim 1 or 2, characterized in that The control means includes
When it is determined by the determination that the detected atmospheric pressure is equal to or less than the pressure value of the second predetermined range that defines the predetermined range, the air volume is increased by a certain amount with respect to the air volume set in the air conditioner. The air conditioning system according to any one of claims 1 to 3, wherein A temperature sensor for detecting the temperature of the air conditioner blowout;
The control means includes
The air conditioning according to any one of claims 1 to 4, wherein a temperature of the cooling air is controlled so that a temperature of the cooling air blown out from the air conditioner is higher than a dew point temperature. system. The air conditioning system according to claim 2, further comprising a dehumidifying unit that dehumidifies so that a dew point temperature below the double floor is lower than a preset dew point temperature. The control means includes
After performing control to change the operating state of the air conditioner, the measurement result of the atmospheric pressure detection unit when a certain time has elapsed since the execution of the control, and the atmospheric pressure detection unit detected before performing the control The air conditioning system according to claim 2, wherein a case where the difference from the measurement result is less than a predetermined value is detected. There is a double floor where equipment is installed, and an air conditioner supplies cooling air to the underfloor space of the double floor, and the cooling air of the underfloor space passes from the underfloor space of the double floor to the double floor. The cooling air supplied to the first flow path for flowing the cooling air on the floor surface through the opening of the floor surface of the floor cools the device to become hot air. An air conditioning method in an air conditioning system in which the discharged hot air is recirculated to the air conditioner via a second flow path,
Detecting the atmospheric pressure in the first flow path;
Determining whether the detected atmospheric pressure is within a predetermined range;
Controlling the air volume of the air conditioner based on the result of the determination. There is a double floor where equipment is installed, and an air conditioner supplies cooling air to the underfloor space of the double floor, and the cooling air of the underfloor space passes from the underfloor space of the double floor to the double floor. The cooling air supplied to the first flow path for flowing the cooling air on the floor surface through the opening of the floor surface of the floor cools the device to become hot air. A computer provided in an air conditioning system in which the discharged hot air is recirculated to the air conditioner through a second flow path;
Detecting the atmospheric pressure in the first flow path;
Determining whether the detected atmospheric pressure is within a predetermined range;
And a step of controlling the air volume of the air conditioner based on the result of the determination.

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