JP5543181B2 - Outside air-cooling computer room air conditioner - Google Patents

Outside air-cooling computer room air conditioner Download PDF

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JP5543181B2
JP5543181B2 JP2009272521A JP2009272521A JP5543181B2 JP 5543181 B2 JP5543181 B2 JP 5543181B2 JP 2009272521 A JP2009272521 A JP 2009272521A JP 2009272521 A JP2009272521 A JP 2009272521A JP 5543181 B2 JP5543181 B2 JP 5543181B2
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outside air
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computer room
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JP2010261696A (en
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正樹 原
孝誠 市川
誠志 茂呂
典雄 葛岡
忠敬 才野
義高 佐々木
昌則 杉本
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Kajima Corp
Sinko Industries Ltd
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Sinko Industries Ltd
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Description

本発明は、電算室のように、サーバーやルータなどのICT(Information and Communication Technology)装置等の発熱体を有する高発熱の電子装置が設置され、冷房空気を循環させる電算室における電算室用空気調和機に関する。   The present invention is a computer room air in a computer room in which a high heat generation electronic device having a heating element such as an ICT (Information and Communication Technology) device such as a server or a router is installed and the cooling air is circulated like a computer room. It relates to a harmony machine.

従来の電算室(データセンターのコンピュータ室)では、特許文献1に開示されているように、空気調和機からの冷気を床下からサーバー等のラックに送風し、天井からラックからの排気を空気調和機に還気している。CPUの処理能力の向上、ブレードサーバーの普及に伴い、これらサーバーやルータなどのICT装置のような高発熱を伴う装置も急激に高性能・大容量化し、コンピュータシステムが必要とする冷却空気量が急激に増加しており、サーバーの動作環境、特に温熱環境を維持しサーバーの発熱を冷却するために熱源機を運転してサーバー室である電算室の年間冷房を行うために多大なエネルギーを必要としていた。   In a conventional computer room (data center computer room), as disclosed in Patent Document 1, cool air from an air conditioner is blown from below the floor to a rack such as a server, and exhaust from the rack is air-conditioned from the ceiling. I'm returning to the machine. As CPU processing capacity improves and blade servers become more widespread, devices with high heat generation, such as ICT devices such as servers and routers, have rapidly increased in performance and capacity, and the amount of cooling air required by computer systems has increased. It is increasing rapidly and requires a lot of energy to operate the heat source machine and cool the server room annually in order to maintain the operating environment of the server, especially the thermal environment and cool the server heat generation. I was trying.

この従来のデータセンターでの冷房空調システムを、図1に示して説明する。電算室aに隣接して、冷熱源として、フィルターb冷却コイルcと送風ファンdからなる冷水型冷凍機や直膨型室外機等の冷房空調装置eを配置し冷房を行うものであるが、図1において、冷房空調装置eからの冷気Cをグリル床fからサーバーg2等のラックgの前面パネルg1に送風し、サーバーg2の発熱を処理したラックgで暖まった暖気Hは、サーバー内蔵ファンg3によってラックgの背面パネルg4から排気され、この暖機Hは天井吸込口hから通風路iを介して空気調和機eに還気する循環冷却システムである。
ところで、近時、エネルギーの使用量を改善するために、サーバーの動作温熱環境が長時間30℃近くでも連続稼働が可能なサーバーに改良され、年間を通じて大部分の期間を熱源での冷却運転を行わないで、外気そのものでサーバーが設置された電算室の冷房が可能なようになってきた。
A conventional air conditioning system in a data center will be described with reference to FIG. A cooling air conditioner e such as a chilled water type refrigerator or a direct expansion type outdoor unit composed of a filter b cooling coil c and a blower fan d is arranged as a cooling heat source adjacent to the computer room a for cooling. In FIG. 1, the cool air C from the cooling air conditioner e is blown from the grill floor f to the front panel g1 of the rack g such as the server g2, and the warm air H heated in the rack g that has processed the heat generated by the server g2 is G3 is exhausted from the rear panel g4 of the rack g, and this warm-up H is a circulating cooling system that returns air from the ceiling suction port h to the air conditioner e through the ventilation path i.
By the way, recently, in order to improve the amount of energy used, the server has been improved to a server that can be operated continuously even if the operating thermal environment is close to 30 ° C for a long time, and cooling operation with a heat source is performed for most of the period throughout the year. Without doing so, it has become possible to cool the computer room where the server is installed with the outside air itself.

特開2007−232312公報JP 2007-232312 A

ところで、上述した従来の電算室における循環冷却システムにおいて、サーバー等は年間を通して非常に大きな発熱があり、サーバー等の熱負荷を処理するため、莫大なエネルギーが消費されるため、冷却するための空調エネルギーの削減が求められていた。
本発明の空気調和機は、サーバーの動作温熱環境の向上に伴い、外気そのものでサーバーが設置された電算室の冷房が可能であることに着目して、従来、電算室では行われなかった外気冷房を有効に利用して、サーバーを配置した電算室において省エネが図れるようにした電算室用空気調和機を提供しようとするものである。
By the way, in the circulation cooling system in the conventional computer room described above, the server and the like generate a great amount of heat throughout the year, and a huge amount of energy is consumed to process the heat load of the server and the like. There was a need to reduce energy.
The air conditioner according to the present invention pays attention to the fact that the computer room in which the server is installed can be cooled with the outside air as the operating temperature environment of the server is improved. An object of the present invention is to provide an air conditioner for a computer room that can effectively use cooling and can save energy in a computer room in which servers are arranged.

上記課題を解決するために、請求項1の発明は、電算室用空気調和機において、外気を導入する外気ダクトと、独立して稼働可能な2系統の冷却コイルとを設けた電算室用空気調和機であって、前記2系統の第1冷却コイルと第2冷却コイルとはそれぞれの空気通路の上流は互いに隔てられ、それぞれ戸外から外気を取り入れ独立して制御可能な開閉ダンパをダクト経路に有する外気ダクトが接続されることを特徴とする。
請求項2の発明は、請求項1に記載の電算室用空気調和機において、前記2系統の冷却コイルのうち、一方の外気の一部を冷却コイルで冷却した空気と、他方の外気をバイパスにした空気を混合することを特徴とする。
請求項3の発明は、請求項2に記載の電算室用空気調和機において、少なくとも外気が電算室に適する雰囲気と所定の絶対湿度範囲内であって、温度が低くエンタルピーが高い場合には、外気の一部を冷却した空気と、バイパスした外気とを混合することを特徴とする。
請求項4の発明は、請求項1乃至3のいずれかに記載の電算室用空気調和機において、前記2系統の第1冷却コイルと第2冷却コイルとは上端側が互いに接近し下端側が離れたハの字状に配置されることを特徴とする。
すなわち、請求項2から4は、実施例において、空気線図(図3)でのエリアFの範囲で、導入外気温度OAが還気RA或いは排気EAの温度の上限値(「所定値」:本実施例では35℃)よりも低い場合であって、サーバーの動作温度環境から許容される還気のエンタルピーの上限値(「第1所定値」:本実施例では、外気OAのエンタルピーが63[kJ/kg(DA)])よりも大きい場合、及び、導入外気温度OAの前記上限値(本実施例では35℃)よりも高い場合であって、サーバーの動作温度環境の室内温度のエンタルピーの上限値(「第2所定値」:エリアDのエンタルピーの上限値:本実施例では、外気OAのエンタルピーが53[kJ/kg(DA)])よりも大きい場合には、外気OAを導入しないことを特徴とする。
In order to solve the above-mentioned problems, the invention of claim 1 is a computer room air conditioner, wherein the computer room air is provided with an outside air duct for introducing outside air and two cooling coils that can operate independently. The two systems of the first cooling coil and the second cooling coil are separated from each other upstream of the air passages, and open / close dampers that can be independently controlled by taking in outside air from the outside are used as duct paths. The outside air duct which has is connected .
Bypass invention of claim 2, in computer room air conditioner according to claim 1, of the cooling coil of the two systems, the air a portion of one of the outside air is cooled in the cooling coil, the other of the outside air The mixed air is mixed.
The invention of claim 3 is the computer room air conditioner according to claim 2 , wherein at least the outside air is in an atmosphere suitable for the computer room and within a predetermined absolute humidity range, and the temperature is low and the enthalpy is high. It is characterized by mixing the air which cooled a part of outside air, and the outside air which bypassed.
According to a fourth aspect of the present invention, in the computer room air conditioner according to any one of the first to third aspects, the upper end side of the two systems of the first cooling coil and the second cooling coil are close to each other and the lower end side is separated. It is arranged in a square shape.
That is, according to the second to fourth aspects, in the embodiment, in the area F in the air diagram (FIG. 3), the introduced outside air temperature OA is the upper limit value of the temperature of the return air RA or the exhaust EA (“predetermined value”: The upper limit of the enthalpy of return air allowed from the operating temperature environment of the server (“first predetermined value”: in this embodiment, the enthalpy of the outside air OA is 63). [kJ / kg (DA)]) and higher than the upper limit (35 ° C. in this embodiment) of the introduced outside air temperature OA, and the enthalpy of the room temperature of the operating temperature environment of the server When the enthalpy of outside air OA is 53 [kJ / kg (DA)] in this embodiment, the outside air OA is introduced. It is characterized by not.

請求項1の電算室用空気調和機の発明によれば、空調機内を並列に2系統の冷房系統に分け、且つ外気ダクトも2系統に分け其々に接続しており、且つ、各々の系統がコイル等の上流側で隔壁によって隔てられているので、外気をバイパスして導入が可能となるという作用・効果があり、また、冷房コイルやフィルータが独立しているので、1方の冷房系統が故障した場合には、もう1方の冷房系統を駆動させ、その間に冷房コイルやフィルターの故障を修理することができ、バックアップ機能を持たせることができる。According to the invention of the air conditioner for a computer room of claim 1, the inside of the air conditioner is divided into two cooling systems in parallel, and the outside air duct is also divided into two systems, which are connected to each other. Is separated by a partition on the upstream side of the coil, etc., so that it can be introduced by bypassing the outside air, and since the cooling coil and filleter are independent, one cooling system In the event of failure, the other cooling system can be driven, and the failure of the cooling coil or filter can be repaired in the meantime, and a backup function can be provided.
また、請求項2及び3の電算室用空気調和機によれば、請求項2の効果に加えて、一方の外気の一部を冷却コイルで冷却した空気と、他方の外気をバイパスにした空気を混合するので、他方の冷却コイルを稼働する必要がなく、効率の良い運転が可能となる。Moreover, according to the air conditioner for computer rooms of Claims 2 and 3, in addition to the effect of Claim 2, the air which cooled one part of external air with the cooling coil, and the air which bypassed the other external air Therefore, it is not necessary to operate the other cooling coil, and efficient operation is possible.
更に、請求項4の電算室用空気調和機によれば、請求項1乃至3の電算室用空気調和機の効果に加えて、独立した冷却コイルをハの字に配置するので、自明のことならが、冷却コイルの高さを低くでき、2系統の冷房系統をコンパクトにすることができる。Furthermore, according to the computer room air conditioner of claim 4, in addition to the effects of the computer room air conditioner of claims 1 to 3, an independent cooling coil is arranged in a letter C, so that it is obvious. However, the height of the cooling coil can be reduced, and the two cooling systems can be made compact.

従来の電算室における空調システムの説明図、An explanatory diagram of an air conditioning system in a conventional computer room, 本発明の参考例の電算室における空調機及びそのシステムの説明図、Explanatory drawing of the air conditioner and its system in the computer room of the reference example of the present invention, 外気の状態と電算室で必要とする空気線図のエリアを示す空気線図、Air diagram showing the area of the outside air and the area of the air diagram required in the computer room, 図3の空気線図で外気がエリアDである場合の参考例の空調機の稼働状態を説明する図、The figure explaining the operating state of the air conditioner of the reference example when outside air is the area D in the air diagram of FIG. 図3の空気線図で外気がエリアCである場合の参考例の空調機の稼働状態を説明する図、The figure explaining the operating state of the air conditioner of the reference example when outside air is the area C in the air diagram of FIG. 図3の空気線図で外気がエリアEである場合の参考例の空調機の稼働状態を説明する図、The figure explaining the operating state of the air conditioner of the reference example when outside air is the area E in the air diagram of FIG. 図3の空気線図で外気がエリアFである場合の参考例の空調機の稼働状態を説明する図、The figure explaining the operating state of the air conditioner of the reference example when outside air is the area F in the air diagram of FIG. 図3の空気線図で外気がエリアBである場合の参考例の空調機の稼働状態を説明する図、The figure explaining the operating state of the air conditioner of the reference example when outside air is the area B in the air diagram of FIG. 図3の空気線図で外気がエリアAである場合の参考例の空調機の稼働状態を説明する図、The figure explaining the operating state of the air conditioner of the reference example when outside air is the area A in the air diagram of FIG. 図3の空気線図で外気がエリアGである場合の参考例の空調機の稼働状態を説明する図、The figure explaining the operating state of the air conditioner of the reference example when outside air is the area G in the air diagram of FIG. 本発明の実施例の電算室における空調機及びそのシステムの説明図である。It is explanatory drawing of the air conditioner in the computer room of the Example of this invention, and its system. 図3の空気線図で外気がエリアDである場合の実施例の空調機の稼働状態を説明する図、The figure explaining the operating state of the air conditioner of an Example in case the external air is the area D in the air diagram of FIG. 図3の空気線図で外気がエリアCである場合の実施例の空調機の稼働状態を説明する図、The figure explaining the operating state of the air conditioner of an Example in case the outside air is the area C in the air diagram of FIG. 図3の空気線図で外気がエリアEである場合の実施例の空調機の稼働状態を説明する図、The figure explaining the operating state of the air conditioner of an Example in case the outside air is the area E in the air diagram of FIG. 図3の空気線図で外気がエリアFである場合の実施例の空調機の稼働状態を説明する図、The figure explaining the operating state of the air conditioner of an Example in case the outside air is the area F in the air diagram of FIG. 図3の空気線図で外気がエリアBである場合の実施例の空調機の稼働状態を説明する図、The figure explaining the operating state of the air conditioner of an Example in case the external air is the area B in the air diagram of FIG. 図3の空気線図で外気がエリアAである場合の実施例の空調機の稼働状態を説明する図、The figure explaining the operating state of the air conditioner of an Example in case the external air is the area A in the air diagram of FIG. 図3の空気線図で外気がエリアGである場合の実施例の空調機の稼働状態を説明する図である。It is a figure explaining the operating state of the air conditioner of an Example in case the external air is the area G by the air diagram of FIG.

先ず、本発明の参考例を説明するが、電算室(データーセンター)用空調機において、外気を制御可能に取り入れる開閉ダンパを設け、電算室の許容された空調範囲に空調機を稼働するようにして、本発明の省エネを実現した。 First, a reference example of the present invention will be described. In an air conditioner for a computer room (data center), an open / close damper for taking in outside air in a controllable manner is provided so that the air conditioner is operated in an allowable air conditioning range of the computer room. Thus, the energy saving of the present invention was realized.

[参考例]
本発明の好適な電算室用空気調和機およびそのシステムの参考例を、図面に沿って説明する。
図2は、本発明の電算室或いはデーターセンターにおける空気調和機の概要を示す図である。
電算室1(データーセンター)と隣接して冷房空調施設2が配置され、電算室1の内部は、発熱体を有するICT(Information and Communication Technology)装置等の電子装置を収納した複数のラック列(図2では4列を図示)が並列に配置され、ラック3には上下に高発熱の電子装置であるサーバー31が配置され、各サーバー31の前面パネル311には冷気Cを吸い込む吸込孔が設けられ、背面パネル312には内蔵ファン313が設けられており、対向するラック3列間の空間が冷却空間領域C1と排熱空間領域H1とに交互に配置されており、冷却空間領域Cが存在するラック3列間の床には貫通した長孔を有するグリル床4が敷き詰められ、グリル床4の床下空間41は互いに連結されていてチャンバー(空気通路)を形成している。
また、冷却空間領域C1の天井51はラック3の上部32と密接しており、排熱空間領域H1の天井52はチャンバー(空気通路)53が形成され、還気ダクト61、共通還気吸込口611と排気ダクト63の排気吸込口631に連通している。
[ Reference example ]
A preferred example of a computer room air conditioner and its system according to the present invention will be described with reference to the drawings.
FIG. 2 is a diagram showing an outline of the air conditioner in the computer room or data center of the present invention.
A cooling air conditioning facility 2 is arranged adjacent to the computer room 1 (data center), and the inside of the computer room 1 includes a plurality of rack rows (including an ICT (Information and Communication Technology) device having a heating element) containing electronic devices. In FIG. 2, four rows are shown in parallel), the rack 3 is provided with servers 31 that are highly heat generating electronic devices on the top and bottom, and the front panel 311 of each server 31 is provided with a suction hole for sucking cold air C The rear panel 312 is provided with a built-in fan 313, and the spaces between the three opposing racks are alternately arranged in the cooling space region C1 and the exhaust heat space region H1, and the cooling space region C exists. The floor between the three rows of racks is laid with a grill floor 4 having a long through hole, and the underfloor space 41 of the grill floor 4 is connected to each other to form a chamber (air passage).
Further, the ceiling 51 of the cooling space region C1 is in close contact with the upper part 32 of the rack 3, and the ceiling 52 of the exhaust heat space region H1 is formed with a chamber (air passage) 53, a return air duct 61, a common return air suction port. 611 and the exhaust duct 63 of the exhaust duct 63 communicate with each other.

次に、冷房空調施設2を説明するが、図2に示すように、冷房空調施設2には空調機7が配置され、これに戸外から外気を取り入れる外気ダクト64を接続し、電算室からの還気を循環させる第1還気ダクト61及び第2還気ダクト62を接続し、還気を戸外に排気する排気ダクト63を接続している。各経路中にはそれぞれ独立して風量が制御可能な第1還気開閉ダンパ612、第2還気開閉ダンパ(MDR2)622、外気開閉ダンパ(MDO)642が設けられている。
また、第1還気ダクト61の上流側には共通還気吸込口611が、下流側には第1還気開口613が設けられ、第2還気ダクト62の上流側には共通還気吸込口611の下流側には第2還気開口623が設けられ、排気ダクト63の上流側には排気吸入口631が、下流側には戸外に向けて排気口633が設けられ、外気ダクト64の上流側には戸外に向けて外気取入口641が、下流側にはフィルター71に向けて外気開口643が設けられている。
Next, the cooling air-conditioning facility 2 will be described. As shown in FIG. 2, the air-conditioning unit 7 is arranged in the cooling air-conditioning facility 2, and an outside air duct 64 for taking in outside air from outside is connected to the air-conditioning facility 2 from the computer room. A first return air duct 61 and a second return air duct 62 that circulate the return air are connected, and an exhaust duct 63 that exhausts the return air to the outside is connected. In each path, a first return air opening / closing damper 612, a second return air opening / closing damper (MDR2) 622, and an outside air opening / closing damper (MDO) 642 that can independently control the air volume are provided.
A common return air suction port 611 is provided on the upstream side of the first return air duct 61, a first return air opening 613 is provided on the downstream side, and a common return air suction port is provided on the upstream side of the second return air duct 62. A second return air opening 623 is provided on the downstream side of the outlet 611, an exhaust inlet 631 is provided on the upstream side of the exhaust duct 63, and an exhaust outlet 633 is provided on the downstream side toward the outside. An outside air inlet 641 is provided on the upstream side toward the outdoor side, and an outside air opening 643 is provided on the downstream side toward the filter 71.

また、参考例の電算室の空調機7の特徴は、冷房運転ができなくなるとサーバーの冷却に重大な支障をきたすので、バックアップ機能をもたせるために熱源・配管・冷却コイルを2系統にしてあること、外気を取り入れてそのまま電算室を通過させて排出すること、電算室1内は居住空間ではないので、通常のフィルターは必要なく、還気をフィルターやコイルや加湿器をバイパスして直接電算室に循環させることである。このため、空調機の冷却コイルは2系統分の2台を空気の流れに直列に配置・装備し、電算室への空調運転をしていた系統に支障が生じた場合には、系統(AからB)を切り替えて運転を行い、長時間の空調停止することを防いでいる。 In addition, the computer room air conditioner 7 of the reference example has a serious problem in cooling the server if the cooling operation cannot be performed. Therefore, in order to provide a backup function, the heat source, the piping, and the cooling coil have two systems. In addition, taking outside air and letting it pass through the computer room as it is, the computer room 1 is not a living space, so there is no need for a normal filter, and the return air is directly calculated by bypassing the filter, coil or humidifier. To circulate in the room. For this reason, two cooling coils for the air conditioner are arranged and equipped in series with the air flow, and if the system that was in the air conditioning operation to the computer room has trouble, the system (A To B) to prevent the air conditioning from stopping for a long time.

空調機7は、上流から順次にフィルター71、第1冷却コイル72、第2冷却コイル73、水気化式加湿器74、送風ファン75が配置されている。そして、送風ファン75は吹き出し口751が床下空間41に接続され、外気ダクト64は外気取入口641から連通する外気開口643と、第1還気ダクト61の共通換気吸込口611と連通する第1還気開口613とはフィルター71の上流に配置して、第1冷却コイル72,第2冷却コイル73に供給する経路を形成し、第2還気ダクト62の第2還気開口623は水気化式加湿器74の下流に配置して、フィルター71、冷却コイル72,73、水気化式加湿器74をバイパスする経路を形成している。
熱源のA系統の第1冷水配管(A系統)81は第1冷却コイル72に接続され、熱源のB系統の第2冷水配管(B系統)82は第2冷却コイル73に接続され、加湿のための加湿水配管83は水気化式加湿器74に、それぞれバルブ811(V2A),821(V2B),831(VM)を介して接続している。
In the air conditioner 7, a filter 71, a first cooling coil 72, a second cooling coil 73, a water vaporizing humidifier 74, and a blower fan 75 are sequentially arranged from the upstream. The blower fan 75 has a blowout opening 751 connected to the underfloor space 41, and the outside air duct 64 communicates with an outside air opening 643 communicating with the outside air intake 641 and a common ventilation inlet 611 of the first return air duct 61. The return air opening 613 is disposed upstream of the filter 71 to form a path to be supplied to the first cooling coil 72 and the second cooling coil 73, and the second return air opening 623 of the second return air duct 62 is water vaporized. It arrange | positions downstream of the type humidifier 74, and forms the path | route which bypasses the filter 71, the cooling coils 72 and 73, and the water vaporization type humidifier 74. FIG.
The first chilled water pipe (A system) 81 of the A system of the heat source is connected to the first cooling coil 72, and the second chilled water pipe (B system) 82 of the B system of the heat source is connected to the second cooling coil 73, The humidifying water pipe 83 is connected to the water vaporizing humidifier 74 via valves 811 (V2A), 821 (V2B), and 831 (VM), respectively.

電算室での空調の範囲は、余りにも熱くなるとサーバー31に支障が生じるので換気が35度以下になるようにしなければならず、湿度が高すぎると結露や電気回路の短絡といった問題があり、余り乾くと静電気が生じるようになり好ましくなく、電算室1に給気する送風状態の空気の温度と湿度は、図3の空気線図のエリアD内にあるようにすることが好ましいとされている。したがって、外気がエリアD以外のエリアA,B,C,E,Fである場合には、供給空気はエリアD内になるように空調機7で調整する必要がある。   The air conditioning range in the computer room will cause problems with the server 31 if it gets too hot, so ventilation must be below 35 degrees, and if the humidity is too high, there will be problems such as condensation and short circuiting of the electrical circuit, If it is too dry, static electricity is generated, which is not preferable, and it is preferable that the temperature and humidity of the air in the blowing state supplied to the computer room 1 be within the area D of the air diagram of FIG. Yes. Therefore, when the outside air is in areas A, B, C, E, and F other than area D, it is necessary to adjust the supply air by air conditioner 7 so that it is in area D.

参考例では、外気OAが図3の空気線図上において、エリアA乃至Fに分けて、次に述べるように空調機を稼働する。 In the reference example , the outside air OA is divided into areas A to F on the air diagram of FIG. 3, and the air conditioner is operated as described below.

[外気状態がエリアDの場合]
外気OAがエリアD内である場合は、外気をそのまま電算室1へ給気し、暖まった空気Hは全てそのまま戸外に排気する。図3のDに示すように、このエリアDの外気OAの雰囲気が電算室1の最適状態で、湿度60%以下で、温度が約18℃乃至26℃で、絶対湿度0.006乃至0.010[kJ/kg(DA)]で囲まれる範囲である。
この場合の空調機の稼働状態を図4で説明する。
図4において、外気を取り入れるため外気開閉ダンパ(MDO)642と、排気開閉ダンパ(MDE)632とを開にし、他の全て閉とする。すなわち、冷水や加湿の供給は必要がなく、戸外の外気OAは外気取入口641から取り込まれ、空調機7に連通する外気開口643からフィルター71を通過し、送風ファン75により吹き出し口751から床下空間41及びグリル床4から電算室1のサーバー31を冷却する。冷却後の暖まった空気Hは天井52の開口から天井のチャンバー53を通過して全てが排気吸込口631から排気ダクト63を介して、排気EAを排気開口633から戸外に放出される。
この状態では、電算室1に供給する全ての空気SAは外気OAをそのまま給気するので、稼働するのは送風ファン75だけである。
[When outside air is in area D]
When the outside air OA is in the area D, the outside air is supplied to the computer room 1 as it is, and all the warm air H is exhausted to the outside as it is. As shown in D of FIG. 3, the atmosphere of the outside air OA in the area D is the optimum state of the computer room 1, the humidity is 60% or less, the temperature is about 18 ° C. to 26 ° C., and the absolute humidity is 0.006 to 0.010 [kJ / kg (DA)].
The operating state of the air conditioner in this case will be described with reference to FIG.
In FIG. 4, in order to take in outside air, the outside air opening / closing damper (MDO) 642 and the exhaust air opening / closing damper (MDE) 632 are opened and all others are closed. That is, there is no need to supply cold water or humidification, and outdoor outdoor air OA is taken in from the outdoor air inlet 641, passes through the filter 71 through the outdoor air opening 643 communicating with the air conditioner 7, and is blown from the outlet 751 by the blower fan 75. The server 31 in the computer room 1 is cooled from the space 41 and the grill floor 4. The cooled warm air H passes through the ceiling chamber 53 from the opening of the ceiling 52, and all of the exhausted air EA is discharged from the exhaust opening 633 to the outside through the exhaust duct 63 through the exhaust duct 63.
In this state, since all the air SA supplied to the computer room 1 supplies the outside air OA as it is, only the blower fan 75 operates.

[外気状態がエリアCの場合]
エリアCの外気OAの雰囲気は、図3のCに示すように、絶対湿度0.010[kJ/kg(DA)]以下で温度が約18℃以上の場合には湿度60%以上で、温度が約18℃以下の場合には0.010[kJ/kg(DA)]以上で囲まれる範囲である。このように、外気OAがエリアC内の場合は、外気OAはエリアDに比べて、概略には、温度が低く湿度が高いので、温度を上げる必要がある。すなわち、温度が上がれば湿度は低くなる。
この場合に、外気はそのままで、電算室1内からバイパスを通して送風ファン75の経路を形成する第2還気開閉ダンパ(MDR2)622を開にして、還気RAと外気OAとの混合割合を調整することで、エリアD内と同じ空気の状態にできる。また、還気の一部は排気EAとして排気開口633から戸外に放出する。
この場合の空調機の稼働状態を図5で説明する。
図5において、外気を取り入れるため外気開閉ダンパ(MDO)642と、排気開閉ダンパ(MDE)632と、第2還気開閉ダンパ(MDR2)622とを開にし、他の全て閉とする。すなわち、冷水や加湿の供給は必要がなく、戸外の外気OAは外気取入口641から取り込まれ、空調機7に連通する外気開口643からフィルター71を通過し、第2還気開閉ダンパ(MDR2)622からのバイパスされた還気とを混合し、送風ファン75により吹き出し口751から床下空間41及びグリル床4から電算室1のサーバー31を冷却する。冷却後の暖まった空気Hは天井52の開口から天井のチャンバー53を通過して一部は還気RAとなって循環し、一部は排気吸込口631から排気ダクト63を介して、排気開口633から戸外に放出される。
この状態でも、電算室1に供給する空気SAは、外気OAと還気RAの混合で賄うので、稼働するのは送風ファン75だけである。
[When outside air is in area C]
As shown in FIG. 3C, the ambient air OA in area C has an absolute humidity of 0.010 [kJ / kg (DA)] or less and a temperature of about 18 ° C. or higher. In the case of 18 ° C. or lower, the range is surrounded by 0.010 [kJ / kg (DA)] or higher. Thus, when the outside air OA is in the area C, the outside air OA generally has a lower temperature and a higher humidity than the area D, and therefore the temperature needs to be raised. That is, the humidity decreases as the temperature increases.
In this case, the second return air opening / closing damper (MDR2) 622 that forms the path of the blower fan 75 is bypassed from the computer room 1 through the bypass while the outside air remains unchanged, and the mixing ratio of the return air RA and the outside air OA is set. By adjusting, it can be in the same air state as in the area D. Further, a part of the return air is discharged to the outside from the exhaust opening 633 as exhaust EA.
The operating state of the air conditioner in this case will be described with reference to FIG.
In FIG. 5, the outside air opening / closing damper (MDO) 642, the exhaust opening / closing damper (MDE) 632, and the second return air opening / closing damper (MDR2) 622 are opened and all others are closed in order to take in outside air. That is, it is not necessary to supply cold water or humidification, and outdoor outdoor air OA is taken in from the outdoor air inlet 641, passes through the filter 71 from the outdoor air opening 643 communicating with the air conditioner 7, and is returned to the second return air opening / closing damper (MDR 2). The bypassed return air from 622 is mixed, and the blower fan 75 cools the underfloor space 41 from the outlet 751 and the server 31 in the computer room 1 from the grill floor 4. The warmed air H after cooling passes through the ceiling chamber 53 from the opening of the ceiling 52 and partly circulates as return air RA, and part of it circulates from the exhaust inlet 631 through the exhaust duct 63. It is discharged from 633 to the outdoors.
Even in this state, the air SA supplied to the computer room 1 is covered by the mixture of the outside air OA and the return air RA, so that only the blower fan 75 operates.

[外気状態がエリアEの場合]
エリアEの外気OAの雰囲気は、図3のEに示すように、絶対湿度0.010[kJ/kg(DA)]以下で、温度が約35℃以下であり、エンタルピーが53kJ/kg(DA)よりも大きい範囲である。このように外気OAがエリアE内の場合は、外気OAの温度が還気RAの上限(35℃)より低いので外気OAを第1冷却コイル72(又は、バックアップの第2冷却コイル73)で冷却し給気する。冷却コイル72には冷水量を制御する制御弁811(又は、821)が介在しており、この制御弁811により給気SAの空気の状態をエリアD内と同じに調整する。
この場合の空調機の稼働状態を図6で説明する。
図6において、外気OAを取り入れるための外気開閉ダンパ(MDO)642と、排気EAのための排気開閉ダンパ(MDE)632と、前記の冷水量を制御する制御弁811(又は、821)を開にして、他の全てを閉にする。
すなわち、戸外の外気OAは外気取入口641から取り込まれ、空調機7に連通する外気開口643からフィルター71を冷却コイル72を通過し、送風ファン75により吹き出し口751から床下空間41及びグリル床4から電算室1のサーバー31を冷却する。冷却後の暖まった空気Hは天井52の開口から天井のチャンバー53を通過して排気吸込口631から排気ダクト63を介して、排気EAを排気開口633から戸外に放出される。
この状態は、冷却コイル72(又は73)が稼働するが、還気RAよりも外気OAの温度が低いのでこの外気OAを利用することで、冷却コイル72(又は第2冷却コイル73)の負荷が軽減される。
[When outside air is in area E]
As shown in E of FIG. 3, the atmosphere of the outside air OA in area E has an absolute humidity of 0.010 [kJ / kg (DA)] or less, a temperature of about 35 ° C. or less, and an enthalpy of 53 kJ / kg (DA). Is also a large range. Thus, when the outside air OA is in the area E, the temperature of the outside air OA is lower than the upper limit (35 ° C.) of the return air RA, so the outside air OA is removed by the first cooling coil 72 (or the backup second cooling coil 73). Cool and supply air. A control valve 811 (or 821) for controlling the amount of cold water is interposed in the cooling coil 72, and the state of the air in the supply air SA is adjusted to be the same as in the area D by the control valve 811.
The operating state of the air conditioner in this case will be described with reference to FIG.
In FIG. 6, an open / close damper (MDO) 642 for taking in external air OA, an exhaust open / close damper (MDE) 632 for exhaust EA, and the control valve 811 (or 821) for controlling the amount of cold water are opened. And close everything else.
That is, outdoor outside air OA is taken in from the outside air inlet 641, passes through the cooling coil 72 through the filter 71 from the outside air opening 643 communicating with the air conditioner 7, and is blown from the outlet 751 to the underfloor space 41 and the grill floor 4 by the blower fan 75. The server 31 in the computer room 1 is cooled. The cooled warm air H passes through the ceiling chamber 53 from the opening of the ceiling 52, and the exhaust EA is discharged from the exhaust opening 633 to the outside through the exhaust duct 63 through the exhaust suction port 631.
In this state, although the cooling coil 72 (or 73) is operated, the temperature of the outside air OA is lower than the return air RA, so that the load of the cooling coil 72 (or the second cooling coil 73) is utilized by using this outside air OA. Is reduced.

[外気状態がエリアFの場合]
外気OAがエリアFの場合は、図3のFに示すように、外気OAの温度が35℃(所定値)よりも低い場合であって、外気のエンタルピーが63[kJ/kg(DA)](第1所定値)よりも大きい場合、及び、外気OAの温度が所定値(35℃)よりも高い場合で外気OAのエンタルピーが53kJ/kg(DA))(第2所定値)よりも大きい場合には外気OAを導入しない。
すなわち、参考例の空気線図(図3)でのエリアFの範囲であって、導入外気温度OAが還気RA或いは排気EAの温度の上限値(「所定値」:本参考例では35℃)よりも低い場合であって、サーバーの動作温度環境から許容される還気のエンタルピーの上限値(「第1所定値」:本参考例では、外気OAのエンタルピーが63[kJ/kg(DA)])よりも大きい場合、及び、導入外気OA温度の前記上限値(本参考例では35℃)よりも高い場合であって、サーバーの動作温度環境の室内温度のエンタルピーの上限値(「第2所定値」:エリアDのエンタルピーの上限値:本参考例では、外気のエンタルピーが54[kJ/kg(DA)])よりも大きい場合には、外気OAを導入せず、外気OAの導入をやめ還気RAのみを循環させ冷却コイル72(又は73)で冷却して、エリアDの空気の状態にして給気する。
この場合の空調機の稼働状態を図7で説明する。
図7において、外気OAを取り入れるための外気開閉ダンパ(MDO)642と排気EAのための排気開閉ダンパ(MDE)632とは閉じる。そして、前記の冷水量を制御する制御弁811(又は、821)を開にするとともに、第1還気開閉ダンパ(MDR1)612を開にし、空調機7に連通する第1還気開口613からフィルター71を冷却コイル72(又は73)を通過させて所定温度に冷房して、送風ファン75により吹き出し口751から床下空間41及びグリル床4から電算室1のサーバー31を冷却する。冷却後の暖まった空気Hは天井52の開口から天井のチャンバー53を通過して再び全部が還気となって循環する。
この状態だけは、従来の電算室1の冷房と同じであり、空調エネルギーも変わらない。
[When outside air is in area F]
When outside air OA is area F, as shown in F of FIG. 3, the temperature of outside air OA is lower than 35 ° C. (predetermined value), and the enthalpy of outside air is 63 [kJ / kg (DA)]. The enthalpy of the outside air OA is greater than 53 kJ / kg (DA)) (the second predetermined value) when it is greater than the (first predetermined value) and when the temperature of the outside air OA is higher than the predetermined value (35 ° C.). In some cases, outside air OA is not introduced.
That is, it is the range of the area F in the air diagram (FIG. 3) of the reference example , and the introduced outside air temperature OA is the upper limit value of the temperature of the return air RA or the exhaust EA (“predetermined value”: 35 ° C. in this reference example) ), And the upper limit of the enthalpy of return air allowed from the operating temperature environment of the server (“first predetermined value”: in this reference example , the enthalpy of the outside air OA is 63 [kJ / kg (DA )]) And higher than the upper limit of the introduced outside air OA temperature (35 ° C. in this reference example ), and the upper limit of the enthalpy of the indoor temperature of the server operating temperature environment (“No. “2 Predetermined value”: Upper limit value of enthalpy in area D: In this reference example , when the enthalpy of the outside air is larger than 54 [kJ / kg (DA)]), the outside air OA is not introduced and the outside air OA is introduced. And only the return air RA is circulated and cooled by the cooling coil 72 (or 73). And, to supply air to the air in the state of the area D.
The operating state of the air conditioner in this case will be described with reference to FIG.
In FIG. 7, the outside air opening / closing damper (MDO) 642 for taking in outside air OA and the exhaust opening / closing damper (MDE) 632 for exhaust EA are closed. Then, the control valve 811 (or 821) for controlling the amount of cold water is opened, the first return air opening / closing damper (MDR1) 612 is opened, and the first return air opening 613 communicating with the air conditioner 7 is opened. The filter 71 is passed through the cooling coil 72 (or 73) to be cooled to a predetermined temperature, and the blower fan 75 cools the underfloor space 41 from the outlet 751 and the server 31 in the computer room 1 from the grill floor 4. The warmed air H after cooling passes through the ceiling chamber 53 from the opening of the ceiling 52 and is circulated again as all the return air.
Only this state is the same as the cooling of the conventional computer room 1, and the air conditioning energy does not change.

[外気状態がエリアBの場合]
エリアBの外気OAの雰囲気は、図3のBに示すように、エンタルピーが約33kJ/kg(DA)以上から53kJ/kg(DA)以下で、絶対湿度0.006[kJ/kg(DA)]以下で囲まれる範囲と、室温が約26℃以上でエンタルピーが約53kJ/kg(DA)以下で囲まれる範囲である。
外気OAがエリアBの場合は、空気が乾燥しすぎているので、冷却コイルは稼働させないが、外気OAを水気化式加湿で加湿冷却する。このように、加湿量を制御することで、給気する空気の状態をエリアD内と同じに調整する。なお、外気OAの温度が所定値(35℃)よりも高い場合であっても、乾燥していれば、すなわち、外気のエンタルピーが63kJ/kg(DA)(所定値)よりも小さい場合には、水気化式加湿器74が稼働するので、電算室1の温度を低下させることができるからである。
この場合の空調機の稼働状態を図8で説明する。
図8において、外気OAを取り入れるための外気開閉ダンパ(MDO)642と排気EAのための排気開閉ダンパ(MDE)632を開け、更に、水気化式加湿器74の制御弁831を開け、他のダンパや制御弁等は全て閉じる。
すなわち、戸外の外気OAは外気取入口641から取り込まれ、空調機7に連通する外気開口643からフィルター71と冷却コイル72を通過し、これに水気化式加湿器74により所望の湿気が付与されて、送風ファン75により吹き出し口751から床下空間41及びグリル床4から電算室1のサーバー31を冷却する。冷却後の暖まった空気Hは天井52の開口から天井のチャンバー53を通過して排気吸込口631から排気ダクト63を介して、排気EAを排気開口633から戸外に放出される。
この状態でも、電算室1に供給する全ての給気SAは、外気OAを加湿して給気するので、稼働するのは水気化式加湿器74と送風ファン75だけである。
[When outside air is in area B]
As shown in Fig. 3B, the ambient air OA in area B has an enthalpy of about 33 kJ / kg (DA) to 53 kJ / kg (DA) and an absolute humidity of 0.006 [kJ / kg (DA)] or less. And a range surrounded by a room temperature of about 26 ° C. or more and an enthalpy of about 53 kJ / kg (DA) or less.
When the outside air OA is area B, since the air is too dry, the cooling coil is not operated, but the outside air OA is humidified and cooled by water vaporization humidification. Thus, the state of the air to be supplied is adjusted to be the same as in the area D by controlling the humidification amount. Even when the temperature of the outside air OA is higher than a predetermined value (35 ° C.), if it is dry, that is, if the enthalpy of the outside air is smaller than 63 kJ / kg (DA) (predetermined value). This is because the temperature of the computer room 1 can be lowered because the water vaporization type humidifier 74 operates.
The operating state of the air conditioner in this case will be described with reference to FIG.
In FIG. 8, the open / close damper (MDO) 642 for taking in the open air OA and the open / close damper (MDE) 632 for the exhaust EA are opened, and the control valve 831 of the water vaporizing humidifier 74 is opened. Close all dampers and control valves.
That is, outdoor outside air OA is taken in from the outside air inlet 641, passes through the filter 71 and the cooling coil 72 from the outside air opening 643 communicating with the air conditioner 7, and desired moisture is given thereto by the water vaporizing humidifier 74. Then, the blower fan 75 cools the underfloor space 41 from the outlet 751 and the server 31 in the computer room 1 from the grill floor 4. The cooled warm air H passes through the ceiling chamber 53 from the opening of the ceiling 52, and the exhaust EA is discharged from the exhaust opening 633 to the outside through the exhaust duct 63 through the exhaust suction port 631.
Even in this state, all the supply air SA supplied to the computer room 1 supplies the air OA after humidifying it, so that only the water vaporizing humidifier 74 and the blower fan 75 operate.

[外気状態がエリアAの場合]
エリアAの外気OAの雰囲気は、図3のAに示すように、低温の場合でエンタルピーが約33kJ/kg(DA)以下で、絶対湿度0.006[kJ/kg(DA)]以下で囲まれる範囲である。
外気OAがエリアAの場合は、外気OAと還気RAとを混合して、その混合割合を調整し、水気化式加湿を通過する前の空気の状態をエリアB内の状態にし、外気OAと還気RAを混合した空気を水気化式加湿器74で加湿冷却することで、加湿後の空気の状態をエリアD内の空気の状態に調整する。
この場合の空調機の稼働状態を図9で説明する。
図9において、外気OAを取り入れるための外気開閉ダンパ(MDO)642と排気EAのための排気開閉ダンパ(MDE)632とは開け、更に、水気化式加湿器74の制御弁831と第1還気開閉ダンパ(MDR1)612とを開け、他のダンパや制御弁等は全て閉じる。
すなわち、戸外の外気OAは外気取入口641から取り込まれ、空調機7に連通する外気開口643と電算室1からの第1還気開口613とで外気OAと還気RAを所定比率で混合して、フィルター71と冷却コイル72を通過させ、これに水気化式加湿器74により所望の湿気が付与されて、送風ファン75により吹き出し口751から床下空間41及びグリル床4から電算室1のサーバー31を冷却する。冷却後の暖まった空気Hは天井52の開口から天井のチャンバー53を通過して、一部は還気RAとなって循環し、一部は排気吸込口631から排気ダクト63を介して、排気EAを排気開口633から戸外に放出される。
この状態でも、電算室1に供給する空気SAは、外気OAと還気RAとを混合し、加湿して給気するので、稼働するのは水気化式加湿器74と送風ファン75だけである。
[When outside air is in area A]
As shown in Fig. 3A, the atmosphere of outside air OA in area A is a range where the enthalpy is about 33 kJ / kg (DA) or less and the absolute humidity is 0.006 [kJ / kg (DA)] or less at a low temperature. It is.
When the outside air OA is the area A, the outside air OA and the return air RA are mixed, the mixing ratio is adjusted, the state of the air before passing through the water vaporization type humidification is changed to the state in the area B, and the outside air OA And the air mixed with the return air RA are humidified and cooled by the water vaporizing humidifier 74 to adjust the state of the air after humidification to the state of the air in the area D.
The operating state of the air conditioner in this case will be described with reference to FIG.
In FIG. 9, the open / close damper (MDO) 642 for taking in the open air OA and the open / close damper (MDE) 632 for the exhaust EA are opened, and the control valve 831 and the first return of the water vaporizing humidifier 74 are opened. Open the open / close damper (MDR1) 612 and close all other dampers and control valves.
That is, outdoor outside air OA is taken in from outside air inlet 641, and outside air OA and return air RA are mixed at a predetermined ratio by outside air opening 643 communicating with air conditioner 7 and first return air opening 613 from computer room 1. Then, the filter 71 and the cooling coil 72 are passed, and desired moisture is given to the filter 71 and the cooling coil 72 by the water vaporizing humidifier 74, and the blower fan 75 sends the air from the outlet 751 to the underfloor space 41 and the grill floor 4 to the computer in the computer room 1. 31 is cooled. The warmed air H after cooling passes through the ceiling chamber 53 from the opening of the ceiling 52, partially circulates as return air RA, and partially circulates from the exhaust suction port 631 through the exhaust duct 63. EA is discharged from the exhaust opening 633 to the outside.
Even in this state, the air SA supplied to the computer room 1 mixes the outside air OA and the return air RA, and humidifies and supplies the air, so that only the water vaporizing humidifier 74 and the blower fan 75 operate. .

[外気状態がエリアGの場合]
エリアGの外気OAの雰囲気は、図3のGに示すように、エンタルピーが約64kJ/kg(DA)以下で、絶対湿度0.010[kJ/kg(DA)]以上で囲まれる範囲である。
外気OAがエリアGの場合は、外気OAのエンタルピーが還気RAの上限より小さいので、外気OAを冷却コイル72(又は73)で冷却湿減した空気とバイパス路の還気RAとを混合して給気する。外気OAを冷却湿減することでエリアC内と同じ空気の状態に調整し、バイパス還気RAとの混合割合を調整することでエリアD内と同じ空気の状態にする。
この場合の空調機の稼働状態を図10で説明する。
図10において、外気OAを取り入れるための外気開閉ダンパ(MDO)642を開き、冷却コイル72(又は73)で冷却減湿してエリアC内の状態にし、還気バイパス路の第2還気ダクト62での第2還気開閉ダンパ(MDR2)622を開いて還気RAと混合して、エリアD内と同じ空気の状態にして、送風ファン75により吹き出し口751から床下空間41及びグリル床4から電算室1のサーバー31を冷却する。冷却後の暖まった空気Hは天井52の開口から天井のチャンバー53を通過して、一部は還気RAとなって循環し、一部は排気吸込口631から排気ダクト63を介して、排気EAを排気開口633から戸外に放出される。
この状態でも、外気OAを有効に利用して、冷却コイル72(又は第2冷却コイル73)の負荷を軽減している。
[When outside air is in area G]
The atmosphere of the outside air OA in the area G is a range surrounded by an enthalpy of about 64 kJ / kg (DA) or less and an absolute humidity of 0.010 [kJ / kg (DA)] or more as indicated by G in FIG.
When the outside air OA is in the area G, the enthalpy of the outside air OA is smaller than the upper limit of the return air RA. Therefore, the outside air OA is dehumidified by the cooling coil 72 (or 73) and the return air RA in the bypass passage is mixed. To supply air. The outside air OA is adjusted to the same air state as in the area C by reducing the humidity of the outside air OA, and the same air state as in the area D is adjusted by adjusting the mixing ratio with the bypass return air RA.
The operating state of the air conditioner in this case will be described with reference to FIG.
In FIG. 10, the outside air opening / closing damper (MDO) 642 for taking in outside air OA is opened and cooled and dehumidified by the cooling coil 72 (or 73) to be in the area C, and the second return air duct of the return air bypass path. The second return air opening / closing damper (MDR2) 622 at 62 is opened and mixed with the return air RA so as to be in the same air state as in the area D, and is blown from the outlet 751 by the blower fan 75 to the underfloor space 41 and the grill floor 4. The server 31 in the computer room 1 is cooled. The warmed air H after cooling passes through the ceiling chamber 53 from the opening of the ceiling 52, partially circulates as return air RA, and partially circulates from the exhaust suction port 631 through the exhaust duct 63. EA is discharged from the exhaust opening 633 to the outside.
Even in this state, the load on the cooling coil 72 (or the second cooling coil 73) is reduced by effectively using the outside air OA.

以上のように、本参考例の空調機は、以下の利点を有する。
(1)外気OAの状態が図3の空気線図上のエリアDにある場合には、外気OAで電算室の冷房が出来るので省エネである。
(2)外気OAの状態が水気化式加湿器74で加湿冷却するエリアA,Bにある場合には、熱源の冷却水を使用せずに外気OAで電算室1の冷房が出来るので省エネを図ることが出来る。
(3)外気OAの状態がバイパス回路の還気RAを使用するエリアC,Gにある場合には、冷却コイル72(又は73)、水気化式加湿器74を通過する空気量を減らし空気側の抵抗を減少することが出来る。したがって、同量の空気を電算室1に送風していても空気側の抵抗が減少するので送風機動力の削減が図れ省エネとなる。
したがって、外気OAの状態が図3の空気線図のエリアA、B,C、Dにある場合には熱源の運転は不要である。外気OAの状態がエリアC,Gにある場合にはバイパス回路の還気を使用して送風機動力の削減が出来る。
ところで、東京近郊では、年間を通じた外気の状態の大部分がエリアA、B,C,D、Gにあるので、本発明の空調機を使用することにより、外気OAの状態がエリアA,B、C、D,Gにある場合には省エネが図れることから、年間を通じた省エネは極めて大きくなる。
As described above, the air conditioner of the present reference example has the following advantages.
(1) When the outside air OA is in the area D on the air diagram of FIG. 3, the outside air OA can cool the computer room, which saves energy.
(2) When the outside air OA is in the areas A and B where it is humidified and cooled by the water vaporizing type humidifier 74, the computer room 1 can be cooled by the outside air OA without using the cooling water of the heat source, so that energy is saved. I can plan.
(3) When the state of the outside air OA is in the areas C and G where the return air RA of the bypass circuit is used, the amount of air passing through the cooling coil 72 (or 73) and the water vaporizing humidifier 74 is reduced to the air side. The resistance can be reduced. Therefore, even if the same amount of air is blown to the computer room 1, the resistance on the air side is reduced, so that the power of the blower can be reduced and energy is saved.
Therefore, when the state of the outside air OA is in the areas A, B, C, and D of the air diagram of FIG. 3, the operation of the heat source is unnecessary. When the state of the outside air OA is in the areas C and G, the power of the blower can be reduced by using the return air of the bypass circuit.
By the way, in the suburbs of Tokyo, most of the outside air conditions throughout the year are in the areas A, B, C, D, and G. By using the air conditioner of the present invention, the outside air OA is in the areas A and B. , C, D and G can save energy, so energy saving throughout the year is extremely large.

次に、本発明の本実施例1を説明するが、電算室用空調機において、従来のバックアップ用の冷却コイル系統を有効に活用して、外気取り入れダクトも2系統として、各ダクト経路中に制御可能に取り入れる開閉ダンパを設け、電算室の許容された空調範囲に空調機を稼働するようにして、本発明の省エネを実現した。 Next, the first embodiment of the present invention will be described. In a computer room air conditioner, a conventional back-up cooling coil system is effectively used, and two outside air intake ducts are provided in each duct path. An open / close damper that can be controlled is provided, and the air conditioner is operated in an allowable air conditioning range of the computer room, thereby realizing the energy saving of the present invention.

本発明の好適な電算室用空気調和機およびそのシステムの実施例1を、図面に沿って説明する。
図11は、本発明の電算室或いはデーターセンターにおける空気調和機の概要を示す図である。
電算室1(データーセンター)と隣接して冷房空調施設2が配置され、電算室1の内部は、発熱体を有する電子装置を収納した複数のラック3の列が並列に配置され、ラック3には上下に電子装置であるサーバ31が配置され、各サーバ31の前面パネル311には冷気Cを吸い込む吸込孔が設けられ、背面パネル312には内蔵ファン313が設けられており、対向するラック3列間の空間が冷却空間領域C1と排熱空間領域H1とに交互に配置されており、冷却空間領域C1が存在するラック3列間の床には貫通した長孔を有するグリル床4が敷き詰められ、グリル床4の床下空間41は互いに連結されていてチャンバー(空気通路)を形成している。
また、冷却空間領域C1の天井51はラック3の上部32と密接しており、排熱空間領域H1の天井52はチャンバー(空気通路)53が形成され、第一還気ダクト61還気吸込口611と排気ダクト63の排気吸込口631に連通している。
Embodiment 1 A preferred computer room air conditioner and system thereof according to the present invention will be described with reference to the drawings.
FIG. 11 is a diagram showing an outline of an air conditioner in a computer room or data center of the present invention.
A cooling air-conditioning facility 2 is arranged adjacent to the computer room 1 (data center), and inside the computer room 1 a plurality of rows of racks 3 containing electronic devices having heating elements are arranged in parallel. The servers 31 that are electronic devices are arranged above and below, the front panel 311 of each server 31 is provided with a suction hole for sucking cold air C, the back panel 312 is provided with a built-in fan 313, and the opposite rack 3 The spaces between the rows are alternately arranged in the cooling space region C1 and the exhaust heat space region H1, and the floor between the three rows of racks in which the cooling space region C1 exists is laid with a grill floor 4 having through holes. The underfloor space 41 of the grill floor 4 is connected to each other to form a chamber (air passage).
The ceiling 51 of the cooling space region C1 is in close contact with the upper portion 32 of the rack 3, and the ceiling 52 of the exhaust heat space region H1 is formed with a chamber (air passage) 53, and the first return air duct 61 is returned to the return air inlet. 611 and the exhaust duct 63 of the exhaust duct 63 communicate with each other.

次に、冷房空調施設2を説明するが、図11に示すように、冷房空調施設2には空調機7が配置され、この空調機7は、上流からフィルター71a,71b、第1冷却コイル72(A系),第2冷却コイル73(B系)、水気化式加湿器74a,74bのユニットの2系統が設けられ、この2系統のユニットの上端側が互いに接近し下端側が離れたハの字状に配置され、それぞれの空気通路の上流は隔壁76で互いに隔てられ、それぞれの2系列には、外気取入口641を介して、戸外から外気を取り入れる外気ダクト64を接続し、この外気ダクト64を分岐して独立してそれぞれ制御可能な第1外気開閉ダンパ(MDO1)652と第2外気開閉ダンパ(MDO2)662をダクト経路に有し、空調機7にそれぞれ第1外気開口653と第2外気開口663に接続している。
また、電算室1から還気を循環させる経路として第1還気ダクト61及び第2還気ダクト62を接続し、還気を戸外に排気する排気ダクト63を接続している。各経路中にはそれぞれ独立して風量が制御可能な第1還気開閉ダンパ(MDR1)612、第2還気開閉ダンパ(MDR2)622、還気開閉ダンパ(MDE)632が設けられている。すなわち、空気通路の上流は互いに隔てられ、それぞれ戸外から外気を取り入れ独立して制御可能な開閉ダンパをダクト経路に有する外気ダクトが接続される。
さらに、第1還気ダクト61の上流側には共通還気吸込口611が、下流側には第1還気開口613が設けられ、第2還気ダクト62の下流側には第2還気開口623が設けられ、排気ダクト63の上流側には排気吸入口631に下流側には戸外に向けて排気口633が設けられている。
Next, the cooling air-conditioning facility 2 will be described. As shown in FIG. 11, the air-conditioning unit 7 is disposed in the cooling-air-conditioning facility 2, and the air-conditioning unit 7 includes filters 71a and 71b and a first cooling coil 72 from upstream. (A system), second cooling coil 73 (B system), and water vaporizing humidifiers 74a and 74b are provided in two systems. The upper end sides of these two systems are close to each other and the lower ends are separated from each other. An upstream air duct 64 for taking in outside air from outside is connected to each of the two series via an outside air inlet 641, and upstream of each air passage is separated from each other by a partition wall 76. The first outside air opening / closing damper (MDO1) 652 and the second outside air opening / closing damper (MDO2) 662 that can be controlled independently of each other are provided in the duct path, and the air conditioner 7 has the first outside air opening 653 and the second outside opening 653 respectively. Connected to the outside air opening 663 ing.
Moreover, the 1st return air duct 61 and the 2nd return air duct 62 are connected as a path | route which circulates return air from the computer room 1, and the exhaust duct 63 which exhausts return air to the outdoors is connected. A first return air opening / closing damper (MDR 1) 612, a second return air opening / closing damper (MDR 2) 622, and a return air opening / closing damper (MDE) 632 are provided in each path so that the air volume can be independently controlled. That is, upstream of the air passage is separated from each other, and an outside air duct having an open and close damper that can be independently controlled by taking in outside air from the outside is connected.
Further, a common return air suction port 611 is provided on the upstream side of the first return air duct 61, a first return air opening 613 is provided on the downstream side, and a second return air is provided on the downstream side of the second return air duct 62. An opening 623 is provided, and an exhaust inlet 631 is provided on the upstream side of the exhaust duct 63, and an exhaust outlet 633 is provided on the downstream side toward the outside.

また、実施例1の電算室1の空調機7の特徴は、冷房運転ができなくなるとサーバの冷却に重大な支障をきたすので、バックアップ機能をもたせるために熱源・配管・冷却コイルを独立した2系統(A系,B系)にしてあること、外気を取り入れてそのまま電算室1を通過させて排出すること、電算室1内は居住空間ではないので、通常のフィルターは必要なく、還気をフィルターやコイルや加湿器をバイパスで繋いで直接電算室1に循環させることである。このため、空調機7の冷却コイルは2系統分の2台を空気の流れに並列に配置・装備し、この2系列を後述する外気を取り入れる場合には2系列を稼働させるが、電算室1への空調運転をしていたどちらかの系統に支障が生じた場合には、系統(AからB)を切り替えて運転を行い、長時間の空調停止を防いでいる。 In addition, the air conditioner 7 of the computer room 1 according to the first embodiment is characterized in that the cooling of the server is seriously hindered if the cooling operation cannot be performed. Therefore, in order to provide a backup function, the heat source, piping, and cooling coil are independent 2 Being a system (A system, B system), taking outside air and letting it pass through the computer room 1 as it is, and the computer room 1 is not a living space, so there is no need for a normal filter. A filter, a coil and a humidifier are connected by a bypass and directly circulated in the computer room 1. For this reason, two cooling coils for the air conditioner 7 are arranged / equipped in parallel with the air flow, and the two systems are operated when taking in the outside air described later. When trouble occurs in one of the systems that have been performing air conditioning operation, the system (A to B) is switched to perform operation, thereby preventing air conditioning from stopping for a long time.

空調機7は、上流から順次にフィルター71a,71b、第1冷却コイル72、第2冷却コイル73、水気化式加湿器74a,74b、送風ファン75が配置されている。そして、送風ファン75は吹き出し口751が床下空間41に接続され、外気ダクト64は外気取入口641から連通する第1外外気開口653と、第1還気ダクト61の共通還気吸込口611と連通する第1還気開口613とはフィルター71aの上流に配置して、第1冷却コイル72,水気化加湿器74aに供給する経路を形成している。また。第2外気開口663と第2還気ダクト62の第2還気開口623とをフィルター71bの上流に配置して、冷却コイル73、水気化式加湿器74bに供給する経路を形成している。
熱源のA系統の独立した第1冷水配管81は第1冷却コイル72に接続され、熱源のB系統の独立した第2冷水配管82は第2冷却コイル73に接続され、加湿のための加湿水配管83は加湿器74a,74bに、それぞれ制御弁(バルブ)811,821,831a,831bを介して接続している。
ここで、独立したA系統の冷水が冷却コイル72に供給される場合は、フィルター71b、水気化式加湿器74b、冷却コイル73より形成される経路がバイパス経路となり、また、独立したB系列の冷水が冷却コイル73に供給される場合は、フィルター71a、水気化式加湿器74a、冷却コイル72より形成される経路がバイパス経路となる。
したがって、独立した2つの熱源・配管・冷却コイルのA系統とB系統は、外気或いはその一部を独立して空調が可能である。
In the air conditioner 7, filters 71 a and 71 b, a first cooling coil 72, a second cooling coil 73, water vaporizing humidifiers 74 a and 74 b, and a blower fan 75 are sequentially arranged from the upstream. The blower fan 75 has a blowout port 751 connected to the underfloor space 41, and the outside air duct 64 has a first outside air opening 653 communicating with the outside air inlet 641, and a common return air suction port 611 of the first return air duct 61. The communicating first return air opening 613 is arranged upstream of the filter 71a to form a path for supplying the first cooling coil 72 and the water vaporizing humidifier 74a. Also. The second outside air opening 663 and the second return air opening 623 of the second return air duct 62 are arranged upstream of the filter 71b to form a path for supplying the cooling coil 73 and the water vaporizing humidifier 74b.
The independent first chilled water pipe 81 of the heat source A system is connected to the first cooling coil 72, and the independent second chilled water pipe 82 of the heat source B system is connected to the second cooling coil 73, and humidified water for humidification. The pipe 83 is connected to the humidifiers 74a and 74b via control valves (valves) 811, 821, 831a and 831b, respectively.
Here, when independent A-system cold water is supplied to the cooling coil 72, the path formed by the filter 71b, the water vaporizing humidifier 74b, and the cooling coil 73 becomes a bypass path, and the independent B-series When cold water is supplied to the cooling coil 73, a path formed by the filter 71a, the water vaporizing humidifier 74a, and the cooling coil 72 is a bypass path.
Accordingly, the two independent heat sources / piping / cooling coils A and B can air-condition outside air or a part thereof independently.

電算室1での空調の範囲は、余りにも熱くなるとサーバ31に支障が生じるので35℃以下になるように換気しなければならず、湿度が高すぎると結露や電気回路の短絡といった問題があり、又、逆に余り乾くと静電気が生じるようになり好ましくなく、従来より電算室1に給気する送風状態の空気の温度と湿度は、図3の空気線図のエリアD内であることが好ましいとされている。したがって、外気がエリアD以外のエリアA,B,C,E,Fの場合には、供給空気はエリアD内になるように空調機7で調整する必要がある。   If the air conditioning range in the computer room 1 becomes too hot, the server 31 will be disturbed, so the server 31 must be ventilated to 35 ° C. or lower. If the humidity is too high, there is a problem such as condensation or short circuit of the electric circuit. On the other hand, if it dries too much, static electricity is generated, which is not preferable, and the temperature and humidity of the air in the blown state supplied to the computer room 1 may be in the area D of the air diagram of FIG. It is preferred. Therefore, when the outside air is in the areas A, B, C, E, and F other than the area D, it is necessary to adjust the supply air by the air conditioner 7 so as to be in the area D.

実施例1では、外気OAが図3の空気線図上において、エリアA乃至Fに分けて、次に述べるように空調機を稼働する。 In the first embodiment , the outside air OA is divided into areas A to F on the air diagram of FIG. 3, and the air conditioner is operated as described below.

[外気状態がエリアDの場合]
外気OAがエリアD内である場合は、外気をそのまま電算室1へ給気し、暖まった空気Hは全てそのまま戸外に排気する。
この場合の空調機の稼働状態を図12で説明する。
図12において、外気を取り入れるための2系列の第1外気開閉ダンパ(MDO1)652及び第2外気開閉ダンパ(MDO2)662、排気開閉ダンパ(MDE)632とを開にし、他の全て閉とする。すなわち、冷水や加湿の供給は必要がなく、戸外の外気OAは外気取入口641から取り込まれ、空調機7に連通する第1外気開口653及び第2外気開口663からフィルター71a,71bを通過し、送風ファン75により吹き出し口751から床下空間41及びグリル床4から電算室1のサーバ31を冷却する。冷却後の暖まった空気Hは天井52の開口から天井のチャンバー53を通過して全てが排気吸込口631から排気ダクト63を介して、排気EAを排気開口633から戸外に放出される。
この状態では、電算室1に供給する全ての空気SAを外気OAで賄うので、送風ファン75の稼働だけである。また、2系統の第1外気開閉ダンパ(MDO1)652、第2外気開閉ダンパ(MDO2)662、及び、2つのフィルター71a,71bを使用するので、空気の搬送抵抗が少なくなり、送風ファン75の負荷も軽減される。
[When outside air is in area D]
When the outside air OA is in the area D, the outside air is supplied to the computer room 1 as it is, and all the warm air H is exhausted to the outside as it is.
The operating state of the air conditioner in this case will be described with reference to FIG.
In FIG. 12, two series of first outside air opening / closing damper (MDO1) 652, second outside air opening / closing damper (MDO2) 662, and exhaust opening / closing damper (MDE) 632 for taking in outside air are opened and all others are closed. . That is, there is no need to supply cold water or humidification, and outdoor outdoor air OA is taken in from the outdoor air intake 641 and passes through the filters 71a and 71b from the first external air opening 653 and the second external air opening 663 communicating with the air conditioner 7. The server 31 in the computer room 1 is cooled from the under floor space 41 and the grill floor 4 by the blower fan 75. The cooled warm air H passes through the ceiling chamber 53 from the opening of the ceiling 52, and all of the exhausted air EA is discharged from the exhaust opening 633 to the outside through the exhaust duct 63 through the exhaust duct 63.
In this state, since all the air SA supplied to the computer room 1 is covered by the outside air OA, only the blower fan 75 is operated. In addition, since two systems of the first outside air opening / closing damper (MDO1) 652, the second outside air opening / closing damper (MDO2) 662 and the two filters 71a and 71b are used, the air conveyance resistance is reduced, and The load is also reduced.

[外気状態がエリアCの場合]
外気OAがエリアC内の場合は、外気OAはエリアDに比べて、概略には、温度が低く湿度が高いので、温度を上げる必要がある。そして、温度が上がれば湿度は低くなる。
この場合に、外気OAはそのままで、還気RAとの混合割合を調整することで、エリアD内と同じ空気の条件にできる。還気RAの一部は排気EAとして排気開口633から戸外に排出する。
この場合の空調機の稼働状態を図13で説明する。
図13において、外気を取り入れるための独立した2系列の第1外気開閉ダンパ(MDO1)652及び第2外気開閉ダンパ(MDO2)662と、排気開閉ダンパ(MDE)632と、第1還気開閉ダンパ(MDR1)612及び第2還気開閉ダンパ(MDR2)622とを開にし、他の全て閉とする。すなわち、冷水や加湿の供給は必要がなく、戸外の外気OAは外気取入口641から取り込まれ、空調機7に連通する第1外気開口653及び第2外気開口663、更に、フィルター71a,71bを通過し、やはり2系統の第1還気開閉ダンパ(MDR1)612及び第2還気開閉ダンパ(MDR2)622からの換気とを混合し、送風ファン75により吹き出し口751から床下空間41及びグリル床4から電算室1のサーバ31を冷却する。冷却後の暖まった空気Hは天井52の開口から天井のチャンバー53を通過して一部は還気RAとなって循環し、一部は排気吸込口631から排気ダクト63を介して、排気EAを排気開口633から戸外に放出される。
この状態でも、電算室1に供給する空気SAは、外気OAと還気RAとを混合して給気するので、稼働するのは送風ファン75だけである。また、2系統の第1外気開閉ダンパ(MDO1)652、第2外気開閉ダンパ(MDO2)662、及び、2つのフィルター71a,71bを使用し、更に、2系統の第1還気ダクト61及び第2還気ダクト62と第1還気開閉ダンパ(MDR1)612及び第2還気開閉ダンパ(MDR2)622を使用するので、空気の搬送抵抗が少なくなり、送風ファン75の負荷も軽減される。
[When outside air is in area C]
When the outside air OA is in the area C, the outside air OA generally has a lower temperature and a higher humidity than the area D, and thus the temperature needs to be raised. And if temperature rises, humidity will become low.
In this case, the outside air OA is left as it is, and the same air condition as in the area D can be obtained by adjusting the mixing ratio with the return air RA. A part of the return air RA is exhausted from the exhaust opening 633 to the outside as exhaust EA.
The operating state of the air conditioner in this case will be described with reference to FIG.
In FIG. 13, two independent series of first outside air opening / closing damper (MDO1) 652 and second outside air opening / closing damper (MDO2) 662 for taking in outside air, an exhaust opening / closing damper (MDE) 632, and a first return air opening / closing damper. (MDR1) 612 and the second return air opening / closing damper (MDR2) 622 are opened, and all others are closed. That is, it is not necessary to supply cold water or humidification, and outdoor outdoor air OA is taken in from the outdoor air intake 641 and is connected to the first external air opening 653 and the second external air opening 663 communicating with the air conditioner 7, and filters 71 a and 71 b. It passes through and mixes the ventilation from the first return air opening / closing damper (MDR1) 612 and the second return air opening / closing damper (MDR2) 622 of the two systems. The server 31 in the computer room 1 is cooled from 4. The warmed air H after cooling passes through the ceiling chamber 53 from the opening of the ceiling 52 and partly circulates as return air RA, and partly circulates from the exhaust inlet 631 through the exhaust duct 63 to the exhaust EA. From the exhaust opening 633 to the outside.
Even in this state, the air SA supplied to the computer room 1 mixes the outside air OA and the return air RA and supplies the air, so that only the blower fan 75 operates. Further, two systems of first outside air opening / closing damper (MDO1) 652, second outside air opening / closing damper (MDO2) 662 and two filters 71a and 71b are used, and further, two systems of first return air duct 61 and second Since the second return air duct 62, the first return air opening / closing damper (MDR1) 612 and the second return air opening / closing damper (MDR2) 622 are used, the air conveyance resistance is reduced and the load of the blower fan 75 is reduced.

[外気状態がエリアEの場合]
外気OAがエリアE内の場合は、外気OAの温度が還気RAの上限(35℃)より低いので外気OAを第1冷却コイル72(又は、バックアップの第2冷却コイル73)で冷却し給気する。冷却コイル72には冷水量を制御する制御弁811(又は、821)が介在しており、この制御弁811により給気SAする空気の状態をエリアD内と同じに調整する。
この場合の空調機の稼働状態を図14で説明する。
図14において、外気OAを取り入れるための第1外気開閉ダンパ(MDO1)652(又は、第2外気開閉ダンパ(MDO2)662)と、排気EAのための排気開閉ダンパ(MDE)632と、前記の冷水量を制御する制御弁811(又は、821)を開にして、他の全てを閉とする。
すなわち、戸外の外気OAは外気取入口641から取り込まれ、空調機7に連通する第1外気開口653(又は、第2外気開口663)からフィルター71a(又は、フィルター71b)を冷却コイル72(又は、第2冷却コイル73)を通過し、送風ファン75により吹き出し口751から床下空間41及びグリル床4から電算室1のサーバ31を冷却する。冷却後の暖まった空気Hは天井52の開口から天井のチャンバー53を通過して排気吸込口631から排気ダクト63を介して、排気EAを排気開口633から戸外に放出される。
この状態は、冷却コイル72(又は73)が稼働するが、還気RAよりも外気OAの温度が低いのでこの外気OAを利用するので、冷却コイル72(又は、第2冷却コイル73)の負荷が軽減される。
ただし、エリアE内でも外気温がそれほど高くない場合には、外気の一部を冷水を供給しない系列の冷却コイル73の配置された通路をバイパス経路として使用し、この外気をバイパス(第2外気開閉ダンパ(MDO2)662)したものを、外気の一部を制御弁811を開けて冷却コイル72で冷却してエリアCの状態にしたものとを混合してエリアD内と同じになるように調整してもよい。
[When outside air is in area E]
When the outside air OA is in the area E, the outside air OA is cooled by the first cooling coil 72 (or the backup second cooling coil 73) because the temperature of the outside air OA is lower than the upper limit (35 ° C.) of the return air RA. I care. A control valve 811 (or 821) for controlling the amount of cold water is interposed in the cooling coil 72, and the state of the air supplied by the control valve 811 is adjusted to be the same as in the area D.
The operating state of the air conditioner in this case will be described with reference to FIG.
In FIG. 14, a first outside air opening / closing damper (MDO1) 652 (or second outside air opening / closing damper (MDO2) 662) for taking in outside air OA, an exhaust opening / closing damper (MDE) 632 for the exhaust EA, The control valve 811 (or 821) for controlling the amount of cold water is opened and all others are closed.
That is, outdoor outdoor air OA is taken in from the outdoor air intake 641, and the filter 71 a (or filter 71 b) is moved from the first outdoor air opening 653 (or second outdoor air opening 663) communicating with the air conditioner 7 to the cooling coil 72 (or And the second cooling coil 73), and the blower fan 75 cools the underfloor space 41 from the blowout opening 751 and the server 31 in the computer room 1 from the grill floor 4. The cooled warm air H passes through the ceiling chamber 53 from the opening of the ceiling 52, and the exhaust EA is discharged from the exhaust opening 633 to the outside through the exhaust duct 63 through the exhaust suction port 631.
In this state, although the cooling coil 72 (or 73) operates, the temperature of the outside air OA is lower than the return air RA, and this outside air OA is used, so the load of the cooling coil 72 (or the second cooling coil 73) Is reduced.
However, when the outside air temperature is not so high even in the area E, a passage where the cooling coil 73 of a series that does not supply cold water is used as a bypass route is used as a bypass route, and this outside air is bypassed (second outside air a material obtained by opening and closing the damper (MDO2) 662), consisting of as those of the state of the outside air area partially cooled by the cooling coil 72 by opening the control valve 811 C the same as the area D engages mixed You may adjust as follows.

[外気状態がエリアFの場合]
外気OAがエリアFの場合(図3:外気OAの温度が35℃(所定値)よりも低い場合であって、外気のエンタルピーが63[kJ/kg(DA)](第1所定値)よりも大きい場合、及び、外気OAの温度が所定値(35℃)よりも高い場合であって外気のエンタルピーが63kJ/kg(DA))(第2所定値)よりも大きい場合)は、外気OAの温度が還気RAの上限より高いか、且つ、外気OAのエンタルピーが還気RAの上限より大きいので外気OAの導入をやめ、還気RAのみを循環させ冷却コイル72(又は73)で冷却して、エリアDの空気の状態にして給気する。
この場合の空調機の稼働状態を図15で説明する。
図15において、外気OAを取り入れるための第1外気開閉ダンパ(MDO1)652及び第2外気開閉ダンパ(MDO2)662と排気EAのための排気開閉ダンパ(MDE)632とは閉じる。そして、前記の冷水量を制御する制御弁811(又は、821)を開にするとともに、第1還気開閉ダンパ(MDR1)612(又は第2還気開閉ダンパ(MDR2)622)を開にし、空調機7に連通する第1還気開口613からフィルター71a(又は71b)を冷却コイル72(又は73)を通過させて所定温度に冷房して、送風ファン75により吹き出し口751から床下空間41及びグリル床4から電算室1のサーバ31を冷却する。冷却後の暖まった空気Hは天井52の開口から天井のチャンバー53を通過して再び全部が還気となって循環する。
この状態だけは、従来の電算室1の冷房と同じであり、空調エネルギーも変わらない。
[When outside air is in area F]
When the outside air OA is in the area F (FIG. 3: the temperature of the outside air OA is lower than 35 ° C. (predetermined value), and the enthalpy of the outside air is 63 [kJ / kg (DA)] (first predetermined value) And the temperature of the outside air OA is higher than a predetermined value (35 ° C.) and the enthalpy of the outside air is larger than 63 kJ / kg (DA)) (second predetermined value)). Is higher than the upper limit of the return air RA, and the enthalpy of the outside air OA is larger than the upper limit of the return air RA, the introduction of the outside air OA is stopped and only the return air RA is circulated and cooled by the cooling coil 72 (or 73). Then, the air in the area D is supplied.
The operating state of the air conditioner in this case will be described with reference to FIG.
In FIG. 15, the first outside air opening / closing damper (MDO1) 652 and the second outside air opening / closing damper (MDO2) 662 for taking in outside air OA and the exhaust opening / closing damper (MDE) 632 for the exhaust EA are closed. Then, the control valve 811 (or 821) for controlling the amount of cold water is opened, the first return air opening / closing damper (MDR1) 612 (or the second return air opening / closing damper (MDR2) 622) is opened, The filter 71a (or 71b) passes through the cooling coil 72 (or 73) from the first return air opening 613 communicating with the air conditioner 7 and is cooled to a predetermined temperature. The server 31 in the computer room 1 is cooled from the grill floor 4. The warmed air H after cooling passes through the ceiling chamber 53 from the opening of the ceiling 52 and is circulated again as all the return air.
Only this state is the same as the cooling of the conventional computer room 1, and the air conditioning energy does not change.

[外気状態がエリアBの場合]
外気OAがエリアBの場合は、空気が乾燥しすぎているので、冷却コイルは稼働させないが、外気OAを水気化式加湿で加湿冷却する。このように、加湿量を制御することで、給気する空気の状態をエリアD内と同じに調整する。
この場合の空調機の稼働状態を図16で説明する。
図16において、外気OAを取り入れるための第1外気開閉ダンパ(MDO1)652(又は、第2外気開閉ダンパ(MDO2)662)と排気EAのための排気開閉ダンパ(MDE)632とは開け、更に、水気化式加湿器74a(又は、74b)の制御弁831a(又は、831b)を開け、他のダンパや制御弁等は全て閉じる。
すなわち、戸外の外気OAは外気取入口641から取り込まれ、空調機7に連通する第1外気開口653からフィルター71aと冷却コイル72を通過し、これに水気化式加湿器74aにより所望の湿気が付与されて、送風ファン75により吹き出し口751から床下空間41及びグリル床4から電算室1のサーバ31を冷却する。冷却後の暖まった空気Hは天井52の開口から天井のチャンバー53を通過して排気吸込口631から排気ダクト63を介して、排気EAを排気開口633から戸外に放出される。
この状態でも、電算室1に供給する空気SAは、外気OAを加湿して給気するので、稼働するのは水気化式加湿器74と送風ファン75だけである。
[When outside air is in area B]
When the outside air OA is area B, since the air is too dry, the cooling coil is not operated, but the outside air OA is humidified and cooled by water vaporization humidification. Thus, the state of the air to be supplied is adjusted to be the same as in the area D by controlling the humidification amount.
The operating state of the air conditioner in this case will be described with reference to FIG.
In FIG. 16, the first outside air opening / closing damper (MDO1) 652 (or the second outside air opening / closing damper (MDO2) 662) for taking in outside air OA and the exhaust opening / closing damper (MDE) 632 for the exhaust EA are opened. Then, the control valve 831a (or 831b) of the water vaporizing humidifier 74a (or 74b) is opened, and all other dampers and control valves are closed.
That is, outdoor outside air OA is taken in from the outside air inlet 641, passes through the filter 71 a and the cooling coil 72 from the first outside air opening 653 communicating with the air conditioner 7, and desired moisture is supplied thereto by the water vaporizing humidifier 74 a. Then, the blower fan 75 cools the underfloor space 41 from the outlet 751 and the server 31 in the computer room 1 from the grill floor 4. The cooled warm air H passes through the ceiling chamber 53 from the opening of the ceiling 52, and the exhaust EA is discharged from the exhaust opening 633 to the outside through the exhaust duct 63 through the exhaust suction port 631.
Even in this state, since the air SA supplied to the computer room 1 humidifies and supplies the outside air OA, only the water vaporizing humidifier 74 and the blower fan 75 operate.

[外気状態がエリアAの場合]
外気OAがエリアAの場合は、外気OAと還気RAとを混合して、その混合割合を調整し、水気化式加湿を通過する前の空気の状態をエリアB内の状態にし、水気化式加湿器74a(又は、74b)で加湿冷却することで、加湿後の空気の状態をエリアD内の空気の状態に調整する。
この場合の空調機の稼働状態を図17で説明する。
図17において、外気OAを取り入れるための第1外気開閉ダンパ(MDO1)652(又は第2外気開閉ダンパ(MDO2)662)と排気EAのための排気開閉ダンパ(MDE)632とは開け、更に、水気化式加湿器74a(又は74b)の制御弁831a(又は831b)と第1還気開閉ダンパ(MDR1)612(又は第2還気開閉ダンパ(MDR2)662)とを開け、他のダンパや制御弁等は全て閉じる。
すなわち、戸外の外気OAは外気取入口641から取り込まれ、空調機7に連通する第1外気開口653(又は第2外気開口663)と電算室1からの第1還気開口613(又は第2還気開口623)とで外気OAと還気RAを所定比率で混合して、フィルター71a(又は71b)と冷却コイル72(又は73)を通過させ、これに水気化式加湿器74a(又は74b)により所望の湿気が付与されて、送風ファン75により吹き出し口751から床下空間41及びグリル床4から電算室1のサーバ31を冷却する。冷却後の暖まった空気は天井52の開口から天井のチャンバー53を通過して、一部は還気RAとなって循環し、一部は排気吸込口631から排気ダクト63を介して、排気EAを排気開口633から戸外に放出される。
この状態でも、電算室1に供給する空気SAは、外気OAと還気RAを混合し加湿して給気するので、稼働するのは水気化式加湿器74a(又は74b)と送風ファン75だけである。
[When outside air is in area A]
When the outside air OA is in the area A, the outside air OA and the return air RA are mixed, the mixing ratio is adjusted, the state of the air before passing through the water vaporization type humidification is changed to the state in the area B, and the water vaporization is performed. By humidifying and cooling with the type humidifier 74a (or 74b), the state of air after humidification is adjusted to the state of air in the area D.
The operating state of the air conditioner in this case will be described with reference to FIG.
In FIG. 17, the first outside air opening / closing damper (MDO1) 652 (or the second outside air opening / closing damper (MDO2) 662) for taking in outside air OA and the exhaust opening / closing damper (MDE) 632 for the exhaust EA are opened, The control valve 831a (or 831b) and the first return air opening / closing damper (MDR1) 612 (or the second return air opening / closing damper (MDR2) 662) of the water vaporizing humidifier 74a (or 74b) are opened, and other dampers or Close all control valves.
That is, outdoor outside air OA is taken in from the outside air inlet 641, and the first outside air opening 653 (or the second outside air opening 663) communicating with the air conditioner 7 and the first return air opening 613 (or the second air opening from the computer room 1). The outside air OA and the return air RA are mixed at a predetermined ratio in the return air opening 623) and passed through the filter 71a (or 71b) and the cooling coil 72 (or 73), and the water vaporizing humidifier 74a (or 74b) is passed through this. ) Is applied, and the blower fan 75 cools the underfloor space 41 from the blowout opening 751 and the server 31 in the computer room 1 from the grill floor 4. The warm air after cooling passes through the ceiling chamber 53 from the opening of the ceiling 52, partly circulates as return air RA, and partly circulates from the exhaust inlet 631 through the exhaust duct 63 to the exhaust EA. From the exhaust opening 633 to the outside.
Even in this state, since the air SA supplied to the computer room 1 mixes the outside air OA and the return air RA and humidifies and supplies the air, only the water vaporizing humidifier 74a (or 74b) and the blower fan 75 operate. It is.

[外気状態がエリアGの場合]
外気OAがエリアGの場合は、外気OAのエンタルピーが還気RAの上限より小さいので、外気OAを冷却コイル72(又は73)で冷却減湿した空気とバイパス路の還気RAとを混合して給気する。外気OAを冷却減湿することでエリアC内と同じ空気の状態に調整し、バイパス還気RAとの混合割合を調整することでエリアD内と同じ空気の状態にする。
この場合の空調機の稼働状態を図18で説明する。
図18において、外気OAを取り入れるため第1外気開閉ダンパ(MDO1)652(又は、第2外気開閉ダンパ(MDO2)662)を開き、冷却コイル72(又は73)で冷却減湿してエリアC内の状態にし、第2還気ダクト62での第2還気開閉ダンパ(MDR2)622を開いて還気RAと混合して、エリアD内と同じ空気の状態にして、送風ファン75により吹き出し口751から床下空間41及びグリル床4から電算室1のサーバ31を冷却する。冷却後の暖まった空気Hは天井52の開口から天井のチャンバー53を通過して、一部は還気RAとなって循環し、一部は排気吸込口631から排気ダクト63を介して、排気EAを排気開口633から戸外に放出される。
この状態でも、外気OAを有効に利用して、冷却コイル72(又は第2冷却コイル73)の負荷を軽減している。
[When outside air is in area G]
When the outside air OA is in the area G, the enthalpy of the outside air OA is smaller than the upper limit of the return air RA. Therefore, the outside air OA is cooled and dehumidified by the cooling coil 72 (or 73) and the return air RA in the bypass passage is mixed. To supply air. The outside air OA is adjusted to the same air state as in the area C by cooling and dehumidifying, and the same air state as in the area D is adjusted by adjusting the mixing ratio with the bypass return air RA.
The operating state of the air conditioner in this case will be described with reference to FIG.
In FIG. 18, in order to take in the outside air OA, the first outside air opening / closing damper (MDO1) 652 (or the second outside air opening / closing damper (MDO2) 662) is opened and cooled and dehumidified by the cooling coil 72 (or 73). The second return air opening / closing damper (MDR2) 622 in the second return air duct 62 is opened and mixed with the return air RA so as to be in the same air state as in the area D. The server 31 in the computer room 1 is cooled from the underfloor space 41 and the grill floor 4 from 751. The warmed air H after cooling passes through the ceiling chamber 53 from the opening of the ceiling 52, partially circulates as return air RA, and partially circulates from the exhaust suction port 631 through the exhaust duct 63. EA is discharged from the exhaust opening 633 to the outside.
Even in this state, the load on the cooling coil 72 (or the second cooling coil 73) is reduced by effectively using the outside air OA.

以上のように、本実施例1の空調機は、以下の利点を有する。
(1)外気OAの状態が図3の空気線図上のエリアDにある場合には、外気OAで電算室1の冷房が出来るので省エネである。
(2)外気OAの状態が水気化式加湿器74で加湿冷却するエリアA,Bにある場合には、熱源の冷却水を使用せずに外気OAで電算室1の冷房が出来るので省エネを図ることが出来る。
(3)外気OAの状態がエリアCにある場合は、熱源の冷却水を使用せずに、外気OAとバイパス還気RAの混合で電算室1の冷房が出来るので省エネとなる。また、還気RAは、冷却コイル72(又は73)、水気化式加湿器74aを通過する空気量を減らし空気側の抵抗を減少することが出来る。したがって、同量の空気を電算室1に送風していても空気側の抵抗が減少するので送風機動力の削減が図れ省エネとなる。
(4)外気OAの状態がエリアGにある場合には、外気OAのみを熱源の冷却水を使用して冷却し、バイパス還気RAと混合するため、冷却コイル72(又は73)、水気化式加湿器74aを通過する空気量を減らし空気側の抵抗を減少させることが出来る。したがって、同量の空気を電算室1に送風していても空気側の抵抗が減少するので送風機動力の削減が図れ省エネとなる。
以上のように、外気OAの状態が図3の空気線図のエリアA、B,C、Dにある場合には熱源の運転は不要である。外気OAの状態がエリアC,Gにある場合にはバイパス回路の還気を使用して送風機動力の削減が出来る。
ところで、東京近郊では、年間を通じた外気の状態の大部分がエリアA、B,C,D、Gにあるので、本発明の空調機を使用することにより、外気OAの状態がA、B,C,D、Gにある場合には、省エネが図ることが可能であることから、年間を通じた省エネは極めて大きくなる。
(5)冷房空気の流れが独立した第1冷却コイル72と第2冷却コイル73の2系統あるので、1方の独立した冷房系統(A系統81)が故障した場合には、空気駆動動力が増えるが、もう1方の独立した冷房系統(B系統82)を駆動させ、その間に故障を修理することができ、バックアップ用の冷房系統を有効に活用することができる。
As described above, the air conditioner of the first embodiment has the following advantages.
(1) When the state of the outside air OA is in the area D on the air diagram of FIG. 3, the computer room 1 can be cooled by the outside air OA, which saves energy.
(2) When the outside air OA is in the areas A and B where it is humidified and cooled by the water vaporizing type humidifier 74, the computer room 1 can be cooled by the outside air OA without using the cooling water of the heat source, so that energy is saved. I can plan.
(3) When the state of the outside air OA is in the area C, the computer room 1 can be cooled by mixing the outside air OA and the bypass return air RA without using the cooling water of the heat source, thereby saving energy. In addition, the return air RA can reduce the amount of air passing through the cooling coil 72 (or 73) and the water vaporizing humidifier 74a and reduce the resistance on the air side. Therefore, even if the same amount of air is blown to the computer room 1, the resistance on the air side is reduced, so that the power of the blower can be reduced and energy is saved.
(4) When the state of the outside air OA is in the area G, only the outside air OA is cooled using the cooling water of the heat source and mixed with the bypass return air RA, so that the cooling coil 72 (or 73), water vaporization The amount of air passing through the humidifier 74a can be reduced and the resistance on the air side can be reduced. Therefore, even if the same amount of air is blown to the computer room 1, the resistance on the air side is reduced, so that the power of the blower can be reduced and energy is saved.
As described above, when the state of the outside air OA is in the areas A, B, C, and D of the air diagram of FIG. 3, the operation of the heat source is unnecessary. When the state of the outside air OA is in the areas C and G, the power of the blower can be reduced by using the return air of the bypass circuit.
By the way, in the suburbs of Tokyo, most of the outside air conditions throughout the year are in areas A, B, C, D, and G. By using the air conditioner of the present invention, the outside air OA state is A, B, In the case of C, D, and G, since energy saving can be achieved, energy saving throughout the year becomes extremely large.
(5) Since there are two systems of the first cooling coil 72 and the second cooling coil 73 with independent cooling air flows, if one independent cooling system (A system 81) fails, the air drive power is Although the number increases, the other independent cooling system (B system 82) can be driven and the failure can be repaired in the meantime, and the backup cooling system can be used effectively.

なお、本発明の特徴を損なうものでなければ、上記の実施例1に限定されるものでないことは勿論である。
例えば、参考例及び実施例1において、第1還気ダクト61と第2還気ダクト62の電算室1の還気吸込口は、共通の共通還気吸込口611としたが、それぞれ別々に設けてもよいことは勿論であり、同様に、実施例1において、第1外気開閉ダンパ652と第2外気開閉ダンパ662のダクトの外気取入口641を共通としたが、それぞれ別々に設けてもよいことは勿論である。
また、参考例ではフィルターや加湿器を冷却コイルの下流に配置したが、実施例1のように上流に配置してもよく、逆に、実施例1では冷却コイルの下流に配置してもよい。更に、実施例1でのバイパスは稼働していない冷却コイルを意味するが、参考例のように冷却コイルの下流に開口を配置するようにしてもよい。
Of course, the present invention is not limited to the first embodiment as long as the characteristics of the present invention are not impaired.
For example, in the reference example and the first embodiment , the return air intake port of the computer room 1 of the first return air duct 61 and the second return air duct 62 is the common common return air intake port 611, but each is provided separately. and it may be is a matter of course, likewise in example 1, the first outdoor air closing damper 652 has been common duct of the outside air inlet 641 of the second outdoor air closing damper 662 may be provided separately from each other Of course.
Also, Reference Example In filters and humidifiers have been positioned downstream of the cooling coil, may be disposed upstream as in Example 1, on the contrary, it may be disposed downstream of the cooling coil in the first embodiment . Furthermore, the bypass in the first embodiment means a cooling coil that is not operating, but an opening may be arranged downstream of the cooling coil as in the reference example .

C・・冷気、C1・・冷却空間領域、
H・・暖気、H1・・排熱空間領域
1・・ 電算室(データーセンター)、
2・・冷房空調施設、
3・・ラック、31・・サーバー、
311・・サーバー前面パネル、312・・サーバー背面パネル、
313・・サーバー内蔵ファン、32・・ラック上部
4・・グリル床、41・・床下空間(チャンバー)
51、52・・天井、53・・チャンバー(空気通路)
61・・第1還気ダクト、611・・共通還気吸込口、
612・・第1還気開閉ダンパ(MDR1)、613・・第1還気開口、
62・・第2還気ダクト、622・・第2還気開閉ダンパ(MDR2)、
623・・第2還気開口、
63・・排気ダクト、631・・排気吸込口、
632・・排気開閉ダンパ(MDE)、633・・排気開口、
64・・外気ダクト、641・・外気取入口、
642・・外気開閉ダンパ(MDO)、643・・外気開口、
652・・第1外気開閉ダンパ(MDO1)、653・・第1外気開口、
662・・第2外気開閉ダンパ(MDO2)、663・・第2外気開口、
7・・空調機、71,71a、71b・・フィルター、
72・・第1冷却コイル、73・・第2冷却コイル、
74(74a,74b)・・水気化式加湿器、
75・・送風ファン、751・・吹き出し口、76・・隔壁、
81・・第1冷水配管(A系統)、811・・制御弁(V2A)、
82・・第2冷水配管(B系統)、821・・制御弁(V2B)、
83・・加湿水配管、831・・制御弁(VM)、
831a,831b・・制御弁(VMB)
C ... Cold air, C1 ... Cooling space area,
H ... Warm air, H1 ... Waste heat space area 1 .... Computer room (data center),
2. Cooling air conditioning facilities,
3 .. Rack, 31 .. Server,
311 ··· Server front panel, 312 · · · Server rear panel,
313 .. Server built-in fan, 32. Rack upper part 4. Grill floor, 41. Under floor space (chamber)
51, 52 ... Ceiling, 53 ... Chamber (air passage)
61 .. First return air duct, 611 .. Common return air inlet,
612 ··· First return air opening / closing damper (MDR1), 613 ··· First return air opening,
62 .. Second return air duct, 622 .. Second return air opening / closing damper (MDR2),
623 .. second return opening,
63..Exhaust duct, 631 ... Exhaust air inlet,
632 .. Exhaust opening / closing damper (MDE), 633 .. Exhaust opening,
64 .. Outside air duct, 641 .. Outside air intake,
642 .. Open air opening and closing damper (MDO), 643 .. Open air opening,
652 .. First outside air opening / closing damper (MDO1), 653 .. First outside air opening,
662 .. Second outside air opening / closing damper (MDO2), 663 .. Second outside air opening,
7. ・ Air conditioners, 71, 71a, 71b ・ ・ Filters
72 .. First cooling coil, 73 .. Second cooling coil,
74 (74a, 74b) ・ ・ Water vaporizing humidifier,
75 .... Blower fan, 751 ... Blowout port, 76 ... Bulk,
81 .. First cold water pipe (A system), 811 .. Control valve (V2A),
82 .. Second cold water piping (B system), 821 .. Control valve (V2B),
83 ... Humidification water piping, 831 ... Control valve (VM),
831a, 831b ・ ・ Control valve (VMB)

Claims (3)

外気を導入する外気ダクトと、独立して稼働可能な2系統の冷却コイルとを並列して設けた電算室用空気調和機であって、
前記2系統の第1冷却コイルと第2冷却コイルとはそれぞれの空気通路の上流は互いに隔てられ、それぞれ戸外から外気を取り入れ独立して制御可能な開閉ダンパをダクト経路に有する外気ダクトが接続され、
前記2系統の冷却コイルのうち、冷水を供給しない系列の冷却コイルの配置された通路をバイパス経路として使用し、該バイパスにした空気と、他の外気の一部を冷却コイルで冷却した空気とを混合するようにしたことを特徴とする電算室用空気調和機。
An air conditioner for a computer room in which an outside air duct for introducing outside air and two cooling coils that can be operated independently are provided in parallel ,
The two systems of the first cooling coil and the second cooling coil are separated from each other upstream of the air passages, and are connected to an outside air duct having an open / close damper that can be independently controlled by taking outside air from the outside in the duct path. ,
Of the two cooling coils, a passage in which a cooling coil of a series that does not supply cold water is used as a bypass route, and the bypassed air and air that has cooled some of the outside air with the cooling coil, An air conditioner for a computer room, characterized by mixing .
少なくとも外気が電算室に適する雰囲気と所定の絶対湿度範囲内であって、温度が低くエンタルピーが高い場合には、外気の一部を冷却した空気と、バイパスした外気とを混合することを特徴とする請求項1に記載の電算室用空気調和機。 At least the outside air is suitable for the computer room and within the specified absolute humidity range, and when the temperature is low and the enthalpy is high, the air that has cooled a part of the outside air is mixed with the bypassed outside air. The computer room air conditioner according to claim 1 . 前記2系統の第1冷却コイルと第2冷却コイルとは上端側が互いに接近し下端側が離れたハの字状に配置されることを特徴とする請求項1又は2に記載の電算室用空気調和機。
3. The air conditioning system for a computer room according to claim 1, wherein the first cooling coil and the second cooling coil of the two systems are arranged in a square shape in which the upper end sides are close to each other and the lower end sides are separated from each other. Machine.
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