JP4640675B2 - Air conditioning system - Google Patents

Description

  The present invention relates to an air conditioning system for a room having a high heat generation density by a server or the like.

  Conventionally, devices such as servers are accommodated in multiple stages in a rack, and the racks are arranged in a rack row and installed in an equipment room.

In recent years, with the spread of the Internet and the like, as the communication and information facilities are enriched, the power / thermal load density of the server rapidly increases to about 5 to 6 KW / m ² , and further 10 to 11 KW / m ^{2 for} blade type servers. It is about.

  As an air conditioning system for a room with such a high power / heat load density, a local cooling device has been installed above each passage space between rack rows mounted with devices such as servers, and a blower is installed above the rack. There is an air conditioning system in which low-temperature conditioned air from a local cooling device is taken into a rack from an opening, and exhaust heat from the equipment is locally processed by a blower (Patent Document 1).

According to this invention, since the local cooling device is installed separately from the rack, even if a failure occurs in some of the local cooling devices, there is little fluctuation in static pressure, and the existing equipment is installed. Is easy to handle and easy to maintain.
JP 2003-166729 A

  However, in the air conditioning system as in Patent Document 1, it is necessary to newly install a local cooling device, and management such as maintenance is required. Moreover, the load applied to the local cooling device itself is further added to the load of the server or the like, resulting in poor efficiency. Furthermore, since one local cooling device is installed for a set of about three racks, the cooling cannot be performed intensively for each rack, resulting in poor efficiency.

  This invention solves the said subject, and it aims at providing the air-conditioning system which can be utilized efficiently by energy saving, minimizing the installation newly installed.

This invention solves the said subject, Comprising: In the air-conditioning system which air-conditions the equipment room which installed and arranged the several rack row | line | column with which the rack which mounted the apparatus up and down was arranged side by side, the electric current value of the said apparatus is set to the said rack. A device switchboard to be managed every time, a control device for calculating a predicted value of the heat generation amount of each rack from the current value managed by the device switchboard, and controlling an air-conditioning unit based on the predicted value, and a room temperature for detecting a room temperature And the equipment room has an underfloor chamber and a ceiling chamber, and the air conditioning unit has an air conditioner that blows air to the underfloor chamber, and every rack on every other floor between the rack rows. Installed on the ceiling surface on the side where there is no air air volume adjusting means between the rack rows, and air air volume adjusting means for adjusting the air air volume to be blown into the equipment room from the underfloor chamber And an exhaust means for blowing air to the ceiling chamber outside the equipment room, and the control device controls the air conditioner and the exhaust means according to a detection value detected by the room temperature sensor, and The air flow rate adjusting means is controlled for each rack according to the current value for each rack to be managed .

In addition, the air conditioner blows air every other rack row .

  ADVANTAGE OF THE INVENTION According to this invention, by applying the management information of an equipment switchboard to control of an air conditioning system, it can be efficiently utilized with energy saving while suppressing newly provided equipment to the minimum. Further, by providing the air flow rate adjusting means for each rack, it is possible to control each rack.

Hereinafter, an embodiment of an air-conditioning system will be described with reference to the drawings. FIG. 1 is a conceptual diagram of an air conditioning system according to this embodiment. In addition, although the actual air conditioner is installed so that it may blow in parallel with a rack row | line, the position is changed for convenience in FIG. In the figure, 1 is an air conditioning unit, 2 is an air conditioner, 3 is a VAV grating outlet as an example of an air flow rate adjusting means, 4 is an outlet, 5 is a damper, 6 is an exhaust fan as an example of an exhaust means, and 7 is A room temperature sensor, 7a is a cool room temperature sensor, 7b is a hot room temperature sensor, 10 is a room, 11 is an equipment room, 11a is a cool corridor, 11b is a hot corridor, 12 is a retin chamber, 13 is an underfloor chamber, 14 is a ceiling chamber, 16 Is a wall surface, 17 is a floor surface, 18 is a ceiling surface, 21 is a first opening, 22 is a floor surface opening, 23 is a ceiling surface opening, 24 is a second opening, AS is an air conditioning system, A is air, L is a rack, and L _{1 to} L ₄ are rack rows.

  The structure of the chamber 10 of the air conditioning system AS of this embodiment will be described. The equipment room 11 in which the rack L is installed has a double-chamber structure with a wall chamber 16 and a retent chamber 12 in which the air conditioner 2 is installed. A chamber 13 is formed. A first opening 21 is provided between the lettan chamber 12 and the underfloor chamber 13. A floor surface opening 22 is provided in the floor surface 17 between the equipment room 11 and the underfloor chamber 13, and the VAV grating outlet 3 is installed in the floor surface opening 22. A ceiling chamber 14 is formed on the ceiling surface 18 of the equipment room 11. A ceiling surface opening 23 is provided in the ceiling surface 18 between the equipment room 11 and the ceiling chamber 14, and the exhaust fan 6 is installed in the ceiling surface opening 23. A second opening 24 is provided between the ceiling chamber 14 and the lettan chamber 12.

  As shown in FIG. 2, the VAV grating blower outlet 3 has a floor blower outlet 4 that is supported by a support M provided on the slab S and through which air A passes, and a damper 5 that can be freely opened and closed. Air A is passed from the underfloor chamber 13 to the equipment room 11 while adjusting the amount.

In the equipment room 11, rows of racks L on which communication / information processing equipment is mounted on the floor surface 17 are installed, and in this embodiment, four rows L _{1 to} L ₄ are installed. The rack L is configured by stacking devices such as servers in multiple stages, and has an opening for maintenance and inspection on the front or rear surface, so that air A flows from the front surface to the rear surface. The rack rows are arranged in such a way that the front or rear surfaces of the racks L face each other, and in this embodiment, between the first rack row L ₁ and the second rack row L ₂ and the third rack. Between the row L ₃ and the fourth rack row L ₄ is the front surface of the rack L, between the wall surface 16 and the first rack row L _1, and between the second rack row L ₂ and the third rack row L _3. Is the rear surface of the rack L.

VAV grating outlets 3 ₁ and 3 ₂ are formed on the floor surface between the first rack row L ₁ and the second rack row L _2, and similarly, the third rack row L ₃ and the fourth rack row L _4. VAV grating outlets 3 ₃ and 3 ₄ are formed on the floor surface 17 between the first rack row L ₁ and the second rack row L ₂ to cool the equipment in the rack L. A cool corridor 11a ₃₄ is formed between the cool corridor 11a ₁₂ through which the air A to be transmitted passes and the third rack row L ₃ and the fourth rack row L ₄ .

In addition, the ceiling surface opening 23 between the side wall 16 without VAV grating outlet 3 and the first rack rows L ₁ is formed an exhaust fan _61, likewise, no side of the VAV grating outlet 3 An exhaust fan ₆₂₃ is formed in the ceiling surface opening 23 between the second rack row L ₂ and the third rack row L _3, and between the wall surface 16 and the first rack row L _1. , hot corridor 11b ₁ that air a is cooled warm equipment in the rack L passes, hot corridor 11b ₂₃ is formed between the second rack row L ₂ and the third row of racks L _3.

Further, a room temperature sensor 7 for detecting the room temperature is installed above the cool corridor 11a and the hot corridor 11b, and the room temperature sensor 7 above the cool corridors 11a ₁₂ and 11a ₃₄ is connected to the cool room temperature sensors 7a ₁₂ and 7a ₃₄ and the hot corridor 11b. The room temperature sensors 7 above ₁ and 11b ₂₃ are designated as hot room temperature sensors 7b ₁ and 7b ₂₃ .

In this embodiment, _four rack rows L _{1 to} L ₄ are installed, but the number of rack rows is not limited to four, and any number of rows may be installed. At that time, every other cool corridor 11a provided with the VAV grating outlet 3 and hot corridor 11b provided with the exhaust fan 6 are arranged.

Further, the VAV grating outlet 3 is installed between the first rack row L ₁ and the second rack row L ₂ and on the front side of the equipment between the third rack row L ₃ and the fourth rack row L _4. and cool corridor 11a Te, between the wall 16 and the first rack rows L _1, and a hot established the exhaust fan 6 to the apparatus rear surface side between the second rack row L ₂ and the third rack row L ₃ The corridor 11b is used, but it may be reversed. In particular, it is desirable to provide the hot corridor 11b in the exhaust direction of the equipment or rack L.

  Next, the flow of air A in the air conditioning system AS of the present embodiment will be described. First, fresh air A is discharged from the air conditioner 2 installed in the retan chamber 12 that separates the equipment room 11 and the wall surface 16. The discharged air A passes through the first opening 21 and is supplied to the underfloor chamber 13 provided in the lower part of the floor surface 17 of the equipment room 11. The underfloor chamber 13 is provided with a VAV grating air outlet 3 having an air outlet 4 and a damper 5. The VAV grating air outlet 3 allows air A to pass from the underfloor chamber 13 to the equipment room 11 while adjusting the flow rate. The air A that has passed through the VAV grating outlet 3 is blown out to the cool corridor 11 a in the equipment room 11. The temperature of the air A at this time is detected by the first room temperature sensor 7a. Thereafter, the air A passes through the rack L on which the communication / information processing device is mounted and flows to the hot corridor 11b. The temperature of the air A at this time is detected by the second room temperature sensor 7b. Next, the air A flows from the equipment room 11 to the ceiling chamber 14 by the exhaust fan 6 installed on the ceiling surface 18, passes through the second opening 24, and returns to the lettan chamber 12.

  Next, control of the air conditioning system AS will be described with reference to FIGS. FIG. 3 is a block diagram of the air conditioning system AS, and FIG. 4 is a diagram showing an outline of device heat generation prediction control of the air conditioning system AS. In FIG. 3, P is a server switchboard and C is a control device.

  In the control in the air conditioning system AS of the present embodiment, the cool room temperature sensor 7a installed in the cool corridor 11a and the hot room temperature sensor 7b installed in the hot corridor 11b detect the ambient temperature in each corridor and an example of a device switchboard The server switchboard P as a server detects the current value of the equipment in each rack L, and the control device C calculates the predicted value of the heat generation amount of each rack L from the current value managed by the server switchboard P, and the predicted value and The air conditioner 2, which is the air conditioning unit 1, the damper 5 of the VAV grating outlet 3, the exhaust fan 6, and the like are controlled by the detection value of the room temperature sensor 7.

Next, an outline of the control system is shown. For example, as shown in FIG. 4, with respect to the racks installed in the equipment room, the rack rows are shown as rack row L ₁ and rack row L ₂ from the top, and the racks in each rack row are rack L _1-1 from the left. And shown as rack L _2-1 . That is, in the present embodiment, since 13 racks are arranged in each rack row, the uppermost leftmost rack is the rack _L1-1, and the lowermost rightmost rack is the rack _{L4-. 13}

Air conditioner 2, first of rack rows L ₁ and the first air-conditioner 2a for first cool corridor 11a ₁₂ between rack rows L _2, rack rows L ₃ and the second cool corridor 11a ₃₄ between rack rows L ₄ 2 Air conditioner 2b is installed. One VAV grating outlet 3 is installed for each rack L, and the one corresponding to the upper left rack L _1-1 is the VAV grating outlet 3 _1-1, and the lower right rack L ₄ those corresponding to _-13 and VAV grating blow-out port 3 _4-13. Further, although the magnitude of the current value of each rack L is displayed in shades, it is actually preferable to display in color. In addition, each facility is installed as shown in FIG. 1 and connected as shown in the block diagram shown in FIG.

First, control based on the room temperature sensor 7 will be described. When the first cool room temperature sensor 7a ₁₂ installed in the first cool corridor 11a ₁₂ among the cool corridors 11a detects a temperature higher than normal, the control device C increases the air volume of the first air conditioner 2a, Alternatively, the temperature is controlled to be lowered. When the first hot room temperature sensor 7b ₁ installed in the first hot corridor 11b ₁ of the hot corridor 11b detects a temperature higher than normal, the control device C controls the first exhaust fan 6a ₁ in FIG. Control to increase the rotation speed.

Next, server heat generation prediction control based on the server switchboard P will be described. For example, as shown in FIG. 4, the leftmost rack L _{1-1 in the} rack row L ₁ is indicated by a dark color indicating that the current value is large, based on the signal from the server switchboard P, and the adjacent rack L _{1− If 2} is shown in a lighter color, the amount of heat generated rack L _1-1 many predicts that the amount of heat generated rack L _1-2 is small. Then, the controller C controls the opening and closing angle of the damper 5 _1-1 VAV grating outlet 3 _1-1 of a portion corresponding to the rack L _1-1, to increase the air air volume.

  In addition, if the temperature setting of the air conditioner 2 and the air volume setting, the opening / closing angle of the damper 5 of the VAV grating outlet 3, the rotational speed of the exhaust fan 6, and the like are combined and controlled, finer control becomes possible. A plurality of exhaust fans 6 and room temperature sensors 7 may be provided in each corridor. Further, the VAV grating outlet 3 is not necessarily provided for each rack L, and may be adjusted such that one VAV grating outlet 3 is provided for two racks L.

  In this way, by applying the management information of the server switchboard P to the control of the air conditioning system AS, it is possible to efficiently use it with energy saving while minimizing the equipment to be newly provided. Further, by providing the VAV grating outlet 3 for each rack L, it is possible to control each rack.

The figure which shows the air-conditioning system of this embodiment The figure which shows the VAV grating blower outlet of this embodiment Block diagram of the air conditioning system of this embodiment The figure which shows the server heat_generation | fever prediction control of the air conditioning system of this embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Air-conditioning part, 2 ... Air conditioner, 3 ... VAV grating blower outlet (air volume adjustment means), 4 ... Air outlet, 5 ... Damper, 6 ... Exhaust fan (exhaust means), 7 ... Room temperature sensor, 10 ... Chamber, DESCRIPTION OF SYMBOLS 11 ... Equipment room, 11a ... Cool corridor, 11b ... Hot corridor, 12 ... Retin chamber, 13 ... Under floor chamber, 14 ... Ceiling chamber, 16 ... Wall surface, 17 ... Floor surface, 18 ... Ceiling surface, 21 ... 1st opening part , 22 ... floor opening, 23 ... ceiling surface opening 24: second opening, AS ... air conditioning system, A ... air, L ... rack, L ₁ ~L ₄ ... rack rows, P ... server switchboard (equipment Switchboard), C ... Control device

Claims (2)

In the air conditioning system that air-conditions the equipment room where a plurality of rack rows in which racks with equipment mounted are arranged side by side are installed,
An equipment switchboard for managing the current value of the equipment for each rack;
A control device that calculates a predicted value of the device heat generation amount for each rack from the current value managed by the device switchboard, and controls an air conditioning unit according to the predicted value;
A room temperature sensor for detecting room temperature;
With
The equipment room has an underfloor chamber and a ceiling chamber,
The air conditioning unit
An air conditioner for blowing air into the underfloor chamber;
An air flow rate adjusting means which is installed corresponding to each rack on every other floor between the rack rows and adjusts the air flow rate blown into the equipment room from the underfloor chamber;
Exhaust means that is installed on the ceiling surface on the side without the air flow rate adjusting means between the rack rows and blows air to the ceiling chamber outside the equipment room;
Have
The control device includes:
Controlling the air conditioner and the exhaust means according to the detection value detected by the room temperature sensor,
The air conditioning system characterized in that the air flow rate adjusting means is controlled for each rack in accordance with the current value for each rack managed by the equipment switchboard . The air conditioning system according to claim 1 , wherein the air conditioner blows air every other rack row .

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