JP5478286B2 - Air conditioning control method and apparatus - Google Patents

Air conditioning control method and apparatus Download PDF

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JP5478286B2
JP5478286B2 JP2010021932A JP2010021932A JP5478286B2 JP 5478286 B2 JP5478286 B2 JP 5478286B2 JP 2010021932 A JP2010021932 A JP 2010021932A JP 2010021932 A JP2010021932 A JP 2010021932A JP 5478286 B2 JP5478286 B2 JP 5478286B2
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temperature
supply air
lower limit
air
limit value
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JP2011158219A (en
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龍太 太宰
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Azbil Corp
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Azbil Corp
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Priority to CN201110034628.XA priority patent/CN102141288B/en
Priority to US13/018,659 priority patent/US20110186643A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/0001—Control or safety arrangements for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/76—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by means responsive to temperature, e.g. bimetal springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/0001—Control or safety arrangements for ventilation
    • F24F2011/0006—Control or safety arrangements for ventilation using low temperature external supply air to assist cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Description

この発明は、結露によって物理的損傷を生じる虞がある機器が設置された室を制御対象室とし、この制御対象室への空調機からの給気温度および給気風量を制御する空調制御方法および装置に関するものである。   The present invention relates to an air-conditioning control method for controlling a supply air temperature and an air supply amount from an air conditioner to a control target room, and a room in which equipment that may cause physical damage due to condensation is set as a control target room. It relates to the device.

従来より、サーバなどの電子機器が設置されたデータセンタでは、データセンタ内における機器の排熱を空調機からの給気によって処理するようにしている（例えば、特許文献１，２参照）。   Conventionally, in data centers where electronic devices such as servers are installed, exhaust heat of devices in the data center is processed by supplying air from an air conditioner (see, for example, Patent Documents 1 and 2).

図１０にその概略を示す。同図において、１はデータセンタ（制御対象室）、２はデータセンタ１内に設けられた空調機（冷却装置）、３はデータセンタ１内に設置されたサーバなどの電子機器を収容したラック、４は空調機２に対して設けられた空調制御装置、５は外気の温度および湿度を調整してデータセンタ１内へ供給する外調機、６はデータセンタ１内からの排気の排出を行う排気ファン、７は空調機２からのデータセンタ１内への給気の温度を検出する給気温度センサ、８は空調機２への冷媒の循環量を調節する冷媒循環量調節装置である。   The outline is shown in FIG. In the figure, 1 is a data center (controlled room), 2 is an air conditioner (cooling device) provided in the data center 1, and 3 is a rack containing electronic devices such as servers installed in the data center 1. 4 is an air conditioning control device provided for the air conditioner 2, 5 is an external air conditioner that adjusts the temperature and humidity of the outside air and supplies the air to the data center 1, and 6 is a discharge of exhaust gas from the data center 1. An exhaust fan to be performed, 7 is a supply air temperature sensor that detects the temperature of the supply air from the air conditioner 2 into the data center 1, and 8 is a refrigerant circulation amount adjusting device that adjusts the circulation amount of the refrigerant to the air conditioner 2. .

なお、冷媒循環量調節装置８としては、コンプレッサ（ＣＯＭＰ）、膨張弁、ホットガスバイパス弁など種々の操作対象があるが、この例ではその一例として冷媒循環量調節装置８としてコンプレッサ（ＣＯＭＰ）を用いた例を示している。以下、冷媒循環量調節装置８をＣＯＭＰ８と呼ぶ。   The refrigerant circulation amount adjusting device 8 includes various operation objects such as a compressor (COMP), an expansion valve, and a hot gas bypass valve. In this example, a compressor (COMP) is used as the refrigerant circulation amount adjusting device 8 as an example. The example used is shown. Hereinafter, the refrigerant circulation amount adjusting device 8 is referred to as COMP8.

このシステムにおいて、空調機２は冷却コイル２−１とファン２−２とを備え、ラック３にはファン３−１が内蔵されている。ＣＯＭＰ８は冷却コイル２−１への冷媒の循環通路に設けられている。また、空調機２において、ファン２−２の風量（給気風量）は１００％固定とされている。空調制御装置４は、給気温度センサ７からのデータセンタ１内への給気温度の測定値ｔｓpvを入力とし、この給気温度の測定値ｔｓpvと予め定められている給気温度の設定値ｔｓspとが一致するように、ＣＯＭＰ８へのインバータ出力（ＣＯＭＰＩＮＶ）を調整する。すなわち、給気温度の測定値ｔｓpvと給気温度の設定値ｔｓspとが一致するように、ＣＯＭＰ８へのインバータ出力の％値を調整することによって、冷却コイル２−１への冷媒の供給量を制御する。   In this system, the air conditioner 2 includes a cooling coil 2-1 and a fan 2-2, and the rack 3 includes a fan 3-1. The COMP 8 is provided in the refrigerant circulation passage to the cooling coil 2-1. In the air conditioner 2, the air volume (supply air volume) of the fan 2-2 is fixed to 100%. The air-conditioning control device 4 receives the measured value tspv of the supply air temperature into the data center 1 from the supply air temperature sensor 7 and inputs the measured value tspv of the supply air temperature and a predetermined set value of the supply air temperature. The inverter output (COMPINV) to COMP8 is adjusted so that tssp matches. That is, the refrigerant supply amount to the cooling coil 2-1 is adjusted by adjusting the% value of the inverter output to COMP8 so that the measured value tspv of the supply air temperature and the set value tssp of the supply air temperature match. Control.

このようにして、データセンタ１では、空調機２からの給気風量を１００％固定として、また給気温度を一定として、ラック３に収容されているサーバなどの電子機器の排熱を空調機２からの給気によって処理するようにしている。   In this way, in the data center 1, the exhaust air heat from the electronic devices such as servers accommodated in the rack 3 is fixed with the supply air volume from the air conditioner 2 fixed at 100% and the supply air temperature fixed. It is made to process by the air supply from 2.

データセンタ１において、空調機２からの給気の温度が低すぎると、結露が生じ、データセンタ１内の電子機器に物理的損傷を与えてしまう虞がある。このため、このシステムでは、外調機５によって外気を除湿してデータセンタ１へ取り入れる一方、データセンタ１内で結露が生じない余裕をもった給気温度の設定値ｔｓspを事前に決め、この給気温度の設定値ｔｓspを固定値として、空調機２からの給気温度の一定制御を行うようにしている。なお、この給気温度の一定制御に類似した技術として、特許文献１では、ラックの側面に冷却パネルを設け、このパネル表面が結露しないように、冷却パネルに供給する熱媒の温度を制御するようにしている。   In the data center 1, if the temperature of the air supply from the air conditioner 2 is too low, condensation may occur and the electronic devices in the data center 1 may be physically damaged. For this reason, in this system, the outside air is dehumidified by the external air conditioner 5 and taken into the data center 1, while a set value tssp of the supply air temperature having a margin in which no condensation occurs in the data center 1 is determined in advance. The set value tssp of the supply air temperature is set to a fixed value so that the supply air temperature from the air conditioner 2 is controlled to be constant. As a technique similar to the constant control of the supply air temperature, in Patent Document 1, a cooling panel is provided on the side surface of the rack, and the temperature of the heat medium supplied to the cooling panel is controlled so that the panel surface does not condense. I am doing so.

特開２００３−３５４４１号公報JP 2003-35441 A 特開２００９−１４０４２１号公報JP 2009-140421 A

しかしながら、図１０に示したシステムでは、給気温度の設定値ｔｓspを余裕をもって高めに設定し、この高めに設定した給気温度の設定値ｔｓspを固定として給気温度の一定制御を行うようにしているため、また、空調機２からの給気風量を１００％固定としているため、消費されるエネルギーのロスが大きいという問題があった。   However, in the system shown in FIG. 10, the set value tssp of the supply air temperature is set high with a margin, and the set value tssp of the supply air temperature set higher is fixed, and the constant control of the supply air temperature is performed. Therefore, since the supply air volume from the air conditioner 2 is fixed to 100%, there is a problem that the loss of consumed energy is large.

本発明は、このような課題を解決するためになされたもので、その目的とするところは、給気温度を下げて、その分、給気風量を削減して、省エネルギーを図ることができる空調制御方法および装置を提供することにある。   The present invention has been made in order to solve such problems, and the object of the present invention is to reduce the supply air temperature and reduce the supply air volume accordingly, thereby achieving energy saving. It is to provide a control method and apparatus.

このような目的を達成するために、本発明に係る空調制御方法は、制御対象室の露点温度を測定するステップと、測定された露点温度に基づいて制御対象室において結露が発生する虞のない給気温度の下限値を算出するステップと、機器を収容したラックへの空気の流入側の温度を現在温度として測定するステップと、測定される現在温度に対する要求温度を記憶しておくステップと、算出された給気温度の下限値と測定された現在温度と記憶されている要求温度とに基づいて給気温度の設定値を決定するステップと、算出された給気温度の下限値と測定された現在温度と記憶されている要求温度とに基づいて給気風量の設定値を決定するステップとを備えることを特徴とする。 In order to achieve such an object, the air-conditioning control method according to the present invention includes a step of measuring the dew point temperature of the controlled room, and there is no possibility that condensation occurs in the controlled room based on the measured dew point temperature. A step of calculating a lower limit value of the supply air temperature, a step of measuring the temperature on the air inflow side into the rack containing the equipment as a current temperature, a step of storing a required temperature for the current temperature to be measured, A step of determining a set value of the supply air temperature based on the calculated lower limit value of the supply air temperature , the measured current temperature and the stored required temperature, and the lower limit value of the calculated supply air temperature is measured. And a step of determining a set value of the supply air volume based on the current temperature and the stored required temperature .

この発明では、制御対象室の露点温度を測定し、この露点温度の測定値（ｔｒpv）に基づいて制御対象室において結露が発生する虞のない給気温度の下限値（ｔｓmin1）を算出する。例えば、余裕分をαとし、ｔｓmin1＝ｔｒpv＋αとして給気温度の下限値ｔｓmin1を算出する。   In the present invention, the dew point temperature of the control target room is measured, and the lower limit value (tsmin1) of the supply air temperature at which there is no possibility of condensation in the control target room is calculated based on the measured value (trpv) of the dew point temperature. For example, the margin is α, and the lower limit value tsmin1 of the supply air temperature is calculated as tsmin1 = trpv + α.

そして、機器を収容したラックへの空気の流入側の温度（ラックの入口側の温度）を現在温度（ｔpv）として測定し、算出した給気温度の下限値ｔｓmin1と測定した現在温度ｔpvと記憶されている要求温度ｔspとに基づいて給気温度の設定値ｔｓspを決定する。また、算出した給気温度の下限値ｔｓmin1と測定した現在温度ｔpvと記憶されている要求温度ｔspとに基づいて給気風量の設定値Ｑｓspを決定する。 Then, the temperature on the air inflow side to the rack containing the equipment (temperature on the inlet side of the rack) is measured as the current temperature (tpv), and the calculated lower limit value tsmin1 of the supply air temperature and the measured current temperature tpv are stored. The set value tssp of the supply air temperature is determined based on the required temperature tssp. Further, the set value Qssp of the supply air amount is determined based on the calculated lower limit value tsmin1 of the supply air temperature, the measured current temperature tpv, and the stored required temperature tsp.

本発明において、制御対象室の露点温度を測定するステップに代えて、制御対象室からの排気の露点温度、外調機からの給気の露点温度を測定するステップを設けるようにしてもよい。すなわち、本発明では、制御対象室からの排気の露点温度に基づいて給気温度の下限値を算出するようにしてもよく、外調機からの給気の露点温度に基づいて給気温度の下限値を算出するようにしてもよい。また、本発明において、外調機は必ずしも設けなくてもよく、外調機を設けない場合、外気の露点温度に基づいて給気温度の下限値を算出するようにすることも考えられる。また、本発明は、上述した空調制御方法を適用した空調制御装置としても構成することが可能である。   In the present invention, instead of the step of measuring the dew point temperature of the control target chamber, a step of measuring the dew point temperature of the exhaust gas from the control target chamber and the dew point temperature of the supply air from the external air conditioner may be provided. That is, in the present invention, the lower limit value of the supply air temperature may be calculated based on the dew point temperature of the exhaust from the control target chamber, and the supply air temperature may be calculated based on the dew point temperature of the supply air from the external air conditioner. The lower limit value may be calculated. In the present invention, it is not always necessary to provide an external air conditioner. When no external air conditioner is provided, it is conceivable to calculate the lower limit value of the supply air temperature based on the dew point temperature of the outside air. The present invention can also be configured as an air conditioning control device to which the above-described air conditioning control method is applied.

本発明によれば、制御対象室の露点温度（或いは、排気の露点温度、外調機からの給気の露点温度、外気の露点温度）を測定し、この測定した露点温度に基づいて制御対象室において結露が発生する虞のない給気温度の下限値を算出し、この算出した給気温度の下限値と測定された現在温度と記憶されている要求温度とに基づいて給気温度の設定値および給気風量の設定値を決定するようにしたので、給気温度を下げて、その分、給気風量を削減して、省エネルギーを図ることができるようになる。 According to the present invention, the dew point temperature of the control target room (or the dew point temperature of the exhaust, the dew point temperature of the supply air from the external air conditioner, the dew point temperature of the outside air) is measured, and the control target is based on the measured dew point temperature. Calculate the lower limit value of the supply air temperature that does not cause condensation in the room, and set the supply air temperature based on the calculated lower limit value of the supply air temperature , the measured current temperature, and the stored required temperature Since the value and the set value of the supply air volume are determined, it is possible to reduce the supply air temperature and reduce the supply air volume accordingly, thereby saving energy.

本発明に係る空調制御方法を適用した空調制御システムの説明に入る前の参 考例（参考例１）の概略を示す図である。The outline of ginseng Reference Example before entering the description of the air conditioning control system according to the air conditioning control method according to the present invention (Example 1) shows. 参考例１の空調制御システムにおける空調制御装置の要部を示す機能ブロック図である。It is a functional block diagram which shows the principal part of the air-conditioning control apparatus in the air-conditioning control system of the reference example 1 . 本発明に係る空調制御方法を適用した空調制御システムの実施の形態（実施 の形態１）の概略を示す図である。It is a figure which shows the outline of embodiment ( Embodiment 1) of the air-conditioning control system to which the air-conditioning control method which concerns on this invention is applied. 実施の形態１の空調制御システムにおける空調制御装置の要部を示す機能ブロック図である。FIG. 3 is a functional block diagram illustrating a main part of an air conditioning control device in the air conditioning control system according to the first embodiment . 実施の形態１の空調制御システムで用いる給気温度の設定特性Ｉおよび給気風量の設定特性IIを例示する図である。It is a figure which illustrates the setting characteristic I of the supply air temperature used in the air-conditioning control system of Embodiment 1 , and the setting characteristic II of the supply air volume. 給気温度の下限値が高い場合と低い場合とで異なる給気温度の設定特性Ｉおよび給気風量の設定特性IIを対比して示す図である。It is a figure which contrasts and shows the setting characteristic I of the supply air temperature and the setting characteristic II of the supply air volume which differ depending on whether the lower limit value of the supply air temperature is high or low. 露点温度センサをデータセンタ内からの排気の排出通路に設けた例を示す図である。It is a figure which shows the example which provided the dew point temperature sensor in the discharge path of the exhaust_gas | exhaustion from the inside of a data center. 露点温度センサをデータセンタ内への外調機からの給気の供給通路に設けた例を示す図である。It is a figure which shows the example which provided the dew point temperature sensor in the supply path of the air supply from the external air conditioner in a data center. 外調機を設けない場合に露点温度センサをデータセンタ内への外気の供給通路に設けた例を示す図である。It is a figure which shows the example which provided the dew point temperature sensor in the supply path of the external air in a data center, when not providing an external air conditioner. 従来の空調制御システムの概略を示す図である。It is a figure which shows the outline of the conventional air conditioning control system.

以下、本発明の実施の形態を図面に基づいて詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

〔参考例１〕
図１は本発明に係る空調制御方法を適用した空調制御システムの説明に入る前の参考例（参考例１）の概略を示す図である。同図において、図１０と同一符号は図１０を参照して説明した構成要素と同一或いは同等構成要素を示し、その説明は省略する。 [ Reference Example 1 ]
FIG. 1 is a diagram showing an outline of a reference example (reference example 1) before entering an explanation of an air conditioning control system to which an air conditioning control method according to the present invention is applied. 10, the same reference numerals as those in FIG. 10 denote the same or equivalent components as those described with reference to FIG. 10, and the description thereof is omitted.

この参考例１において、図１０に示した従来のシステムと異なる点は、空調制御装置４が有する機能にある。この参考例１では、空調制御装置４を４Ａとし、従来のシステムにおける空調制御装置と区別する。 The reference example 1 is different from the conventional system shown in FIG. 10 in the function of the air conditioning control device 4. In this reference example 1 , the air conditioning control device 4 is 4A, and is distinguished from the air conditioning control device in the conventional system.

また、この参考例１において、データセンタ１には、データセンタ１内の露点温度を測定する露点温度センサ９が設けられており、この露点温度センサ９からの露点温度の測定値ｔｒpvを空調制御装置４Ａに送るものとしている。 In the first reference example , the data center 1 is provided with a dew point temperature sensor 9 for measuring the dew point temperature in the data center 1, and the measured value trpv of the dew point temperature from the dew point temperature sensor 9 is controlled by air conditioning. The data is sent to the device 4A.

また、この参考例１において、空調機２のファン２−２には、その回転数を可変とするインバータＩＮＶが付設されており、空調制御装置４ＡからのインバータＩＮＶへのインバータ出力（ファンＩＮＶ）の％値を調整することによって、ファン２−２の風量（給気風量）を制御するものとしている。 Further, in Reference Example 1 , the fan 2-2 of the air conditioner 2 is provided with an inverter INV whose rotation speed is variable, and an inverter output (fan INV) from the air conditioning control device 4A to the inverter INV. The air volume of the fan 2-2 (supply air volume) is controlled by adjusting the% value.

空調制御装置４Ａは、プロセッサや記憶装置からなるハードウェアと、これらのハードウェアと協働して各種機能を実現させるプログラムとによって実現され、参考例１特有の機能として空調機２からのデータセンタ１内への給気温度および給気風量の設定値の決定機能を有している。 The air conditioning control device 4A is realized by hardware including a processor and a storage device, and a program that realizes various functions in cooperation with these hardware. A data center from the air conditioner 2 is provided as a function unique to Reference Example 1. 1 has a function for determining the set value of the supply air temperature and the supply air volume.

図２に空調制御装置４Ａの要部の機能ブロック図を示す。以下、この機能ブロック図における各部の機能を交えながら、空調制御装置４Ａが有する給気温度および給気風量の設定値の決定機能について説明する。   FIG. 2 shows a functional block diagram of the main part of the air conditioning control device 4A. Hereinafter, a function for determining the set values of the supply air temperature and the supply air volume of the air conditioning control device 4A will be described with the functions of the respective units in this functional block diagram.

空調制御装置４Ａは、給気温度下限値算出部４０１と、機器制約給気温度下限値記憶部４０２と、給気温度設定値決定部４０３と、給気風量設定値決定部４０４と、ＣＯＭＰＩＮＶ出力部４０５と、ファンＩＮＶ出力部４０６とを備えている。   The air conditioning control device 4A includes a supply air temperature lower limit value calculation unit 401, a device-restricted supply air temperature lower limit value storage unit 402, a supply air temperature setting value determination unit 403, an intake air flow rate setting value determination unit 404, and a COMPINV output. Unit 405 and a fan INV output unit 406.

なお、この例では、空調制御装置４ＡにＣＯＭＰＩＮＶ出力部４０５とファンＩＮＶ出力部４０６を設けた構成としているが、実際のシステムでは空調機２に対して専用のコントローラ（図示せず）が設けられている場合が多く、このような専用のコントローラが空調機２に対して設けられている場合には、その専用のコントローラがＣＯＭＰＩＮＶ出力部４０５やファンＩＮＶ出力部４０６を有する構成とされる。この場合、空調制御装置４Ａからは、ＣＯＭＰＩＮＶ出力部４０５およびファンＩＮＶ出力部４０６が除かれ、給気温度設定値決定部４０３や給気風量設定値決定部４０４で決定された設定値が専用のコントローラへ送信されることになる。   In this example, the COMPINV output unit 405 and the fan INV output unit 406 are provided in the air conditioning control device 4A. However, in an actual system, a dedicated controller (not shown) is provided for the air conditioner 2. When such a dedicated controller is provided for the air conditioner 2, the dedicated controller includes a COMPINV output unit 405 and a fan INV output unit 406. In this case, the COMPINV output unit 405 and the fan INV output unit 406 are removed from the air conditioning control device 4A, and the setting values determined by the supply air temperature setting value determination unit 403 and the supply air amount setting value determination unit 404 are dedicated. It will be sent to the controller.

給気温度下限値算出部４０１は、露点温度センサ９からのデータセンタ１内の露点温度（室内の露点温度）の測定値ｔｒpvを入力とし、この露点温度の測定値ｔｒpvに予め定められている余裕分αを加算して、データセンタ１内で結露が発生する虞のない給気温度の下限値ｔｓmin1（ｔｓmin1＝ｔｒpv＋α）を算出する。すなわち、空調機２からの給気によってデータセンタ１内で除湿（コイル２−１での除湿も含む）が発生する虞のない給気温度の下限値ｔｓmin1を算出する。なお、余裕分αは、室内のＣＯ2濃度から人がどの程度いるかを判断し（室内発生水分量を推定し）、可変とするようにしてもよい。また、ＣＯ2濃度だけではなく、セキュリティシステムなどの情報から、どの程度人がいるかを把握するようにしてもよい。 The supply air temperature lower limit value calculation unit 401 receives the measured value trpv of the dew point temperature (indoor dew point temperature) in the data center 1 from the dew point temperature sensor 9, and is preset to the measured value trpv of this dew point temperature. By adding the margin α, a lower limit value tsmin1 (tsmin1 = trpv + α) of the supply air temperature at which there is no possibility of condensation in the data center 1 is calculated. That is, the lower limit value tsmin1 of the supply air temperature at which there is no possibility of dehumidification (including dehumidification in the coil 2-1) in the data center 1 due to supply of air from the air conditioner 2 is calculated. The margin α may be made variable by determining how much a person is from the indoor CO 2 concentration (estimating the amount of water generated in the room). Further, it may be determined how many people are present not only from the CO 2 concentration but also from information such as a security system.

給気温度設定値決定部４０３は、給気温度下限値算出部４０１によって算出された給気温度の下限値ｔｓmin1を入力とし、この給気温度の下限値ｔｓmin1と機器制約給気温度下限値記憶部４０２に記憶されている機器制約給気温度下限値ｔｓmin2とを比較し、高い方の給気温度の下限値を給気温度の設定値ｔｓspとする。ここで、機器制約給気温度下限値ｔｓmin2とは、空調機２の能力によって制約される給気温度の下限値であり、カタログ等に記載されている給気温度範囲の下限値のことを指す。   The supply air temperature set value determination unit 403 receives the lower limit value tsmin1 of the supply air temperature calculated by the supply air temperature lower limit calculation unit 401, and stores the lower limit value tsmin1 of the supply air temperature and the device-constrained supply air temperature lower limit value. The device-constrained supply air temperature lower limit value tsmin2 stored in the unit 402 is compared, and the lower limit value of the higher supply air temperature is set as the supply air temperature setting value tssp. Here, the device-constrained supply air temperature lower limit value tsmin2 is a lower limit value of the supply air temperature restricted by the capacity of the air conditioner 2, and indicates a lower limit value of the supply air temperature range described in a catalog or the like. .

給気風量設定値決定部４０４は、給気温度設定値決定部４０３によって決定された給気温度の設定値ｔｓspを入力とし、Ｑｓsp（ＣＭＨ）＝定格能力（ｋＷ）×３６００／｛（想定吸込み温度−ｔｓsp）×比重量（ｋｇ／ｍ3））｝として給気風量の設定値Ｑｓspを決定する。なお、この給気風量の設定値Ｑｓspの算出式において、「想定吸込み温度」とは、空調機２の定格運転時に想定されている吸込み温度のことで、カタログ等に記載されている定格時吸込み温度のことの指す。また、「定格能力」とは空調機２の定格冷却能力である。 The supply air amount set value determination unit 404 receives the set value tssp of the supply air temperature determined by the supply air temperature set value determination unit 403, and Qssp (CMH) = rated capacity (kW) × 3600 / {(assumed suction Temperature-tssp) × specific weight (kg / m 3 ))}, the set value Qssp of the supply air volume is determined. In the calculation formula for the set value Qssp of the supply air flow rate, the “assumed suction temperature” is the suction temperature assumed during the rated operation of the air conditioner 2, and the suction at the time described in the catalog etc. It refers to temperature. The “rated capacity” is the rated cooling capacity of the air conditioner 2.

ＣＯＭＰＩＮＶ出力部４０５は、給気温度センサ７からのデータセンタ１内への給気温度の測定値ｔspvと給気温度設定値決定部４０３によって決定された給気温度の設定値ｔｓspとを入力とし、給気温度の測定値ｔspvと給気温度の設定値ｔｓspとが一致するように、ＣＯＭＰ８へのインバータ出力（ＣＯＭＰＩＮＶ）を調整する。   The COMPINV output unit 405 receives the measured value tsspv of the supply air temperature into the data center 1 from the supply air temperature sensor 7 and the set value tssp of the supply air temperature determined by the supply air temperature setting value determination unit 403. Then, the inverter output (COMPINV) to COMP8 is adjusted so that the measured value tsspv of the supply air temperature matches the set value tssp of the supply air temperature.

ファンＩＮＶ出力部４０６は、給気風量設定値決定部４０４によって決定された給気風量の設定値Ｑｓspを入力とし、ファン２−２からの給気風量ＱｓをＱｓspとするように、インバータＩＮＶへのインバータ出力（ファンＩＮＶ）を調整する。   The fan INV output unit 406 receives the setting value Qssp of the supply air amount determined by the supply air amount setting value determination unit 404 and inputs the supply air amount Qs from the fan 2-2 to the inverter INV. The inverter output (fan INV) is adjusted.

このようにして、参考例１では、露点温度センサ９によって測定されるデータセンタ１内の露点温度ｔｒpvより、可能な限り低い値として、データセンタ１内で結露が発生する虞のない給気温度の設定値ｔｓspが決定されるものとなり、またその給気温度の設定値ｔｓspに適した給気風量の設定値Ｑｓspが決定されるようになり、給気温度を下げて、その分、給気風量を削減して、省エネルギーを図ることができるようになる。 In this way, in the reference example 1 , the supply air temperature at which the dew point is not generated in the data center 1 is set as low as possible from the dew point temperature trpv in the data center 1 measured by the dew point temperature sensor 9. Set value tssp is determined, and the set value Qssp of the supply air amount suitable for the set value tssp of the supply air temperature is determined, and the supply air temperature is lowered and the supply air is increased accordingly. The air volume can be reduced to save energy.

なお、参考例１において、給気風量の設定値Ｑｓspを算出する際、この算出される給気風量の設定値Ｑｓspに少し安全を見込んだ値を足しこむようにしてもよい。ラック３に収容されている電子機器の負荷によっては、データセンタ１内が暑くなりすぎるという虞があるが、給気風量の設定値Ｑｓspに少し安全を見込んだ値を足しこむようにすることにより、データセンタ１内が暑くなりすぎるという問題を改善することが可能となる。 In Reference Example 1 , when the set value Qssp of the supply air volume is calculated, a value that is a little safer may be added to the calculated set value Qssp of the supply air volume. Depending on the load of the electronic equipment accommodated in the rack 3, the data center 1 may become too hot. However, by adding a value that allows a little safety to the set value Qssp of the supply air volume, The problem that the inside of the data center 1 becomes too hot can be improved.

〔実施の形態１〕
図３は本発明に係る空調制御方法を適用した空調制御システムの実施の形態（実施の形態１）の概略を示す図である。この実施の形態１において、データセンタ１には、データセンタ１内の露点温度を測定する露点温度センサ９に加え、ラック３の入口側の温度（ラック３への空気の流入側の温度）を現在温度として測定する温度センサ１０が設けられており、露点温度センサ９からの露点温度の測定値ｔｒpvおよび温度センサ１０からの現在温度の測定値ｔpvを空調制御装置４（４Ｂ）へ送るようにしている。 [ Embodiment 1 ]
FIG. 3 is a diagram showing an outline of an embodiment (Embodiment 1) of an air conditioning control system to which an air conditioning control method according to the present invention is applied. In the first embodiment, in addition to the dew point temperature sensor 9 that measures the dew point temperature in the data center 1, the data center 1 includes the temperature on the inlet side of the rack 3 ( the temperature on the air inflow side to the rack 3) . A temperature sensor 10 that measures the current temperature is provided, and the measured value trpv of the dew point temperature from the dew point temperature sensor 9 and the measured value tpv of the current temperature from the temperature sensor 10 are sent to the air conditioning controller 4 (4B). ing.

また、この実施の形態１においても、参考例１と同様、空調機２のファン２−２には、その回転数を可変とするインバータＩＮＶが付設されており、空調制御装置４ＢからのインバータＩＮＶへのインバータ出力（ファンＩＮＶ）の％値を調整することによって、ファン２−２の風量（給気風量）を制御するようにしている。 Also in the first embodiment , similarly to the reference example 1 , the fan 2-2 of the air conditioner 2 is provided with the inverter INV that makes the rotation speed variable, and the inverter INV from the air conditioning control device 4B. The air volume (supply air volume) of the fan 2-2 is controlled by adjusting the% value of the inverter output (fan INV).

図４に空調制御装置４Ｂの要部の機能ブロック図を示す。以下、この機能ブロック図における各部の機能を交えながら、空調制御装置４Ｂが有する給気温度および給気風量の設定値の決定機能について説明する。   FIG. 4 shows a functional block diagram of the main part of the air conditioning control device 4B. Hereinafter, the function for determining the set values of the supply air temperature and the supply air volume of the air conditioning control device 4B will be described while combining the functions of the respective units in this functional block diagram.

空調制御装置４Ｂは、給気温度下限値算出部４１１と、機器制約給気温度下限値記憶部４１２と、給気温度下限値決定部４１３と、要求温度記憶部４１４と、給気温度設定値決定部４１５と、給気風量設定値決定部４１６と、ＣＯＭＰＩＮＶ出力部４１７と、ファンＩＮＶ出力部４１８とを備えている。なお、要求温度記憶部４１４には、温度センサ１０が測定する現在温度ｔpvに対する要求値が要求温度ｔspとして記憶されている。   The air-conditioning control device 4B includes a supply air temperature lower limit value calculation unit 411, a device-constrained supply air temperature lower limit value storage unit 412, a supply air temperature lower limit value determination unit 413, a required temperature storage unit 414, and an intake air temperature set value. A determination unit 415, an air supply air volume setting value determination unit 416, a COMPINV output unit 417, and a fan INV output unit 418 are provided. The required temperature storage unit 414 stores a required value for the current temperature tpv measured by the temperature sensor 10 as the required temperature tsp.

給気温度下限値算出部４１１は、参考例１における給気温度下限値算出部４０１と同様にして、露点温度センサ９からのデータセンタ１内の露点温度（室内の露点温度）の測定値ｔｒpvを入力とし、この露点温度の測定値ｔｒpvに予め定められている余裕分αを加算して、データセンタ１内で結露が発生する虞のない給気温度の下限値ｔｓmin1（ｔｓmin1＝ｔｒpv＋α）を算出する。 The supply air temperature lower limit value calculation unit 411 is the same as the supply air temperature lower limit value calculation unit 401 in Reference Example 1, and the measured value trpv of the dew point temperature (indoor dew point temperature) in the data center 1 from the dew point temperature sensor 9. Is added to the measured value trpv of the dew point temperature and a predetermined margin α is added to obtain the lower limit value tsmin1 (tsmin1 = trpv + α) of the supply air temperature at which there is no possibility of condensation in the data center 1. calculate.

給気温度下限値決定部４１３は、給気温度下限値算出部４１１によって算出された給気温度の下限値ｔｓmin1を入力とし、この給気温度の下限値ｔｓmin1と機器制約給気温度下限値記憶部４１２に記憶されている機器制約給気温度下限値ｔｓmin2とを比較し、高い方の給気温度の下限値を給気温度の下限値ｔｓminとする。   The supply air temperature lower limit determination unit 413 receives the lower limit value tsmin1 of the supply air temperature calculated by the supply air temperature lower limit calculation unit 411, and stores the lower limit value tsmin1 of the supply air temperature and the device-constrained supply air temperature lower limit value. The lower limit value tsmin2 of the device restriction supply air temperature stored in the unit 412 is compared, and the lower limit value of the higher supply air temperature is set as the lower limit value tsmin of the supply air temperature.

給気温度設定値決定部４１５は、給気温度下限値決定部４１３によって決定された給気温度の下限値ｔｓminと温度センサ１０からの現在温度ｔpvと要求温度記憶部４１４に記憶されている要求温度ｔspとを入力とし、図５に示す給気温度の設定特性Ｉに従って給気温度の設定値ｔｓspを決定する。   The supply air temperature set value determination unit 415 includes a lower limit value tsmin of the supply air temperature determined by the supply air temperature lower limit determination unit 413, the current temperature tpv from the temperature sensor 10, and the request stored in the required temperature storage unit 414. Using the temperature tsp as an input, the set value tssp of the supply air temperature is determined according to the setting characteristic I of the supply air temperature shown in FIG.

すなわち、給気温度の下限値ｔｓminを制御パラメータとして利用し、現在温度ｔpvがｔｘよりも高い範囲では、給気温度の設定値ｔｓspを給気温度の下限値ｔｓminとして固定する一方、現在温度ｔpvがｔｘよりも低い範囲では、要求温度ｔspとの差が広がるにつれ、給気温度の設定値ｔｓspを上げて行く。   That is, the lower limit value tsmin of the supply air temperature is used as a control parameter, and in the range where the current temperature tpv is higher than tx, the set value tssp of the supply air temperature is fixed as the lower limit value tsmin of the supply air temperature, while the current temperature tpv In a range lower than tx, the set value tssp of the supply air temperature is increased as the difference from the required temperature tsp increases.

このような給気温度の設定特性Ｉとすることにより、データセンタ１内での負荷が減って、現在温度ｔpvがｔｘよりも低くなると、給気温度の設定値ｔｓspがアップされ、空調機２の能力が下げられる。これにより、データセンタ１内での過冷却が防がれ、省エネルギーとなる。   By setting the supply air temperature setting characteristic I as described above, when the load in the data center 1 decreases and the current temperature tpv becomes lower than tx, the supply air temperature setting value tssp is increased, and the air conditioner 2 The ability of is reduced. This prevents overcooling in the data center 1 and saves energy.

給気風量設定値決定部４１６は、給気温度下限値決定部４１３によって決定された給気温度の下限値ｔｓminと温度センサ１０からの現在温度ｔpvと要求温度記憶部４１４に記憶されている要求温度ｔspとを入力とし、図５に示す給気風量の設定特性IIに従って給気風量の設定値Ｑｓspを決定する。   The supply air amount set value determination unit 416 includes the lower limit value tsmin of the supply air temperature determined by the supply air temperature lower limit determination unit 413, the current temperature tpv from the temperature sensor 10, and the request stored in the required temperature storage unit 414. Using the temperature tsp as an input, a setting value Qssp of the supply air volume is determined according to the setting characteristic II of the supply air volume shown in FIG.

すなわち、給気温度の下限値ｔｓminを制御パラメータとして利用し、給気温度の設定値ｔｓspがｔｓminに固定される前は、予め定められた下限値に給気風量の設定値Ｑｓspを固定する一方、給気温度の設定値ｔｓspがｔｓminに固定された後は、要求温度ｔspとの差が広がるにつれ、給気風量の設定値Ｑｓspを上げて行く。   In other words, the lower limit value tsmin of the supply air temperature is used as a control parameter, and the set value Qssp of the supply air volume is fixed to a predetermined lower limit value before the set value tssp of the supply air temperature is fixed to tsmin. After the supply air temperature setting value tssp is fixed at tsmin, the supply air flow rate setting value Qssp is increased as the difference from the required temperature tssp increases.

このような給気風量の設定特性IIとすることにより、データセンタ１内での負荷が小さい場合には、給気風量の設定値Ｑｓspが下限値に固定されて省エネルギーが図られる一方、データセンタ１内での負荷が増え、現在温度ｔpvがｔｘよりも高くなると、給気風量の設定値Ｑｓspが上げられて行き、データセンタ１内が暑くなることが防がれる。   By setting the supply air flow rate setting characteristic II as described above, when the load in the data center 1 is small, the supply air flow rate setting value Qssp is fixed to the lower limit value to save energy. When the load in 1 increases and the current temperature tpv becomes higher than tx, the set value Qssp of the supply air flow rate is raised, and the inside of the data center 1 is prevented from becoming hot.

ＣＯＭＰＩＮＶ出力部４１７は、給気温度センサ７からのデータセンタ１内への給気温度の測定値ｔspvと給気温度設定値決定部４１５によって決定された給気温度の設定値ｔｓspとを入力とし、給気温度の測定値ｔspvと給気温度の設定値ｔｓspとが一致するように、ＣＯＭＰ８へのインバータ出力（ＣＯＭＰＩＮＶ）を調整する。   The COMPINV output unit 417 receives as input the measured value tsspv of the supply air temperature into the data center 1 from the supply air temperature sensor 7 and the set value tssp of the supply air temperature determined by the supply air temperature setting value determination unit 415. Then, the inverter output (COMPINV) to COMP8 is adjusted so that the measured value tsspv of the supply air temperature matches the set value tssp of the supply air temperature.

ファンＩＮＶ出力部４０６は、給気風量設定値決定部４１６によって決定された給気風量の設定値Ｑｓspを入力とし、ファン２−２からの給気風量ＱｓをＱｓspとするように、インバータＩＮＶへのインバータ出力（ファンＩＮＶ）を調整する。   The fan INV output unit 406 receives the air supply air volume setting value Qssp determined by the air supply air volume setting value determination unit 416 and inputs the air supply air volume Qs from the fan 2-2 to the inverter INV. The inverter output (fan INV) is adjusted.

図６に給気温度の下限値ｔｓminを制御パラメータとして変化する給気温度の設定特性Ｉおよび給気風量の設定特性IIを示す。特性ＩHおよびIIHは給気温度の下限値ｔｓminが高い場合の給気温度の設定特性および給気風量の設定特性を示し、特性ＩLおよびIILは給気温度の下限値ｔｓminが低い場合の給気温度の設定特性および給気風量の設定特性を示す。このような設定特性の変化からも、給気温度の下限値ｔｓminを低くすれば、同程度の冷房要求でも、給気風量（ファンＩＮＶの出力）を抑えることができることが分かる。 FIG. 6 shows a setting characteristic I of the supply air temperature and a setting characteristic II of the supply air volume that change using the lower limit value tsmin of the supply air temperature as a control parameter. Characteristics I H and II H indicate a setting characteristic of the supply air temperature and a setting characteristic of the supply air amount when the lower limit value tsmin of the supply air temperature is high, and the characteristics I L and II L have a lower lower limit value tsmin of the supply air temperature. The setting characteristics of the supply air temperature and the setting characteristics of the supply air volume are shown. It can be seen from such a change in the setting characteristics that if the lower limit value tsmin of the supply air temperature is lowered, the supply air volume (the output of the fan INV) can be suppressed even with the same cooling requirement.

なお、上述した例では、データセンタ１内に露点温度センサ９を設け、室内の露点温度を測定するようにしたが、データセンタ１内からの排気ファン６による排気の露点温度を測定するようにしてもよく、データセンタ１内への外調機５からの給気の露点温度を測定するようにしてもよい。 In the above-described example , the dew point temperature sensor 9 is provided in the data center 1 and the indoor dew point temperature is measured. However, the dew point temperature of the exhaust by the exhaust fan 6 from the data center 1 is measured. Alternatively, the dew point temperature of the supply air from the external air conditioner 5 into the data center 1 may be measured.

すなわち、参考例１を例とした場合、図７に示すように、データセンタ１内からの排気ファン６による排気の排出通路に露点温度センサ９を設け、この露点温度センサ９からの露点温度の測定値ｔｒpvより給気温度の下限値ｔｓmin1を算出するようにしてもよく、図８に示すように、データセンタ１内への外調機５からの給気の供給通路に露点温度センサ９を設け、この露点温度センサ９からの露点温度の測定値ｔｒpvより給気温度の下限値ｔｓmin1を算出するようにしてもよい。 That is, taking Reference Example 1 as an example, as shown in FIG. 7, a dew point temperature sensor 9 is provided in the exhaust discharge path by the exhaust fan 6 from the data center 1, and the dew point temperature from the dew point temperature sensor 9 is measured. The lower limit value tsmin1 of the supply air temperature may be calculated from the measured value trpv. As shown in FIG. 8, a dew point temperature sensor 9 is provided in the supply passage of the supply air from the external air conditioner 5 into the data center 1. It is also possible to calculate the lower limit value tsmin1 of the supply air temperature from the measured value trpv of the dew point temperature from the dew point temperature sensor 9.

また、上述した例では、外調機５を設けるようにしたが、外調機５は必ずしも設けなくてもよい。外調機５を設けない場合、例えば参考例１において、図９に示すように、データセンタ１内への外気の供給通路に露点温度センサ９を設け、この露点温度センサ９からの露点温度の測定値ｔｒpvより給気温度の下限値ｔｓmin1を算出するようにすることも考えられる。 In the example described above , the external air conditioner 5 is provided, but the external air conditioner 5 is not necessarily provided. When the external air conditioner 5 is not provided, for example, in Reference Example 1 , as shown in FIG. 9, a dew point temperature sensor 9 is provided in the outside air supply passage into the data center 1, and the dew point temperature from the dew point temperature sensor 9 is It is also conceivable to calculate the lower limit value tsmin1 of the supply air temperature from the measured value trpv.

また、上述した例では、露点温度センサ９を設けて露点温度を測定するようにしたが、温度と湿度を測定するようにし、この測定した温度と湿度から露点温度を算出するようにしてもよい。本発明において、露点温度を測定するという概念には、測定した温度と湿度から露点温度を算出することも含まれる。 In the example described above , the dew point temperature sensor 9 is provided to measure the dew point temperature. However, the temperature and humidity may be measured, and the dew point temperature may be calculated from the measured temperature and humidity. . In the present invention, the concept of measuring the dew point temperature includes calculating the dew point temperature from the measured temperature and humidity.

また、上述した例では、冷媒循環量調節装置８をコンプレッサ（ＣＯＭＰ）としているが、前述したとおり、膨張弁、ホットガスバイパス弁など種々の操作対象が冷媒循環量調節装置８として考えられることは言うまでもない。 In the above-described example , the refrigerant circulation amount adjusting device 8 is a compressor (COMP). However, as described above, various operation objects such as an expansion valve and a hot gas bypass valve can be considered as the refrigerant circulation amount adjusting device 8. Needless to say.

本発明の空調制御方法および装置は、結露によって物理的損傷を生じる虞がある機器が設置された室を制御対象室への空調機からの給気温度および給気風量を制御する空調制御方法および装置として、サーバなどの電子機器を設置したデータセンタなど様々な室を制御対象室として適用することが可能である。   The air-conditioning control method and apparatus of the present invention include an air-conditioning control method for controlling a supply air temperature and a supply air amount from an air conditioner to a control target room in a room in which equipment that may cause physical damage due to condensation is installed. As a device, various rooms such as a data center in which electronic devices such as servers are installed can be applied as control target rooms.

１…データセンタ、２…空調機（冷却装置）、２−１…冷却コイル、２−２…ファン、ＩＮＶ…インバータ、３…ラック、３−１…ファン（内蔵ファン）、４（４Ａ，４Ｂ）…空調制御装置、５…外調機、６…排気ファン、７…給気温度センサ、８…冷媒循環量調節装置（ＣＯＭＰ）、９…露点温度センサ、１０…温度センサ、４０１…給気温度下限値算出部、４０２…機器制約給気温度下限値記憶部、４０３…給気温度設定値決定部、４０４…給気風量設定値決定部、４０５…ＣＯＭＰＩＮＶ出力部、４０６…ファンＩＮＶ出力部、４１１…給気温度下限値算出部、４１２…機器制約給気温度下限値記憶部、４１３…給気温度下限値決定部、４１４…要求温度記憶部、４１５…給気温度設定値決定部、４１６…給気風量設定値決定部、４１７…ＣＯＭＰＩＮＶ出力部、４１８…ファンＩＮＶ出力部。   DESCRIPTION OF SYMBOLS 1 ... Data center, 2 ... Air conditioner (cooling device), 2-1 ... Cooling coil, 2-2 ... Fan, INV ... Inverter, 3 ... Rack, 3-1 ... Fan (built-in fan), 4 (4A, 4B) ) ... Air conditioning control device, 5 ... External air conditioner, 6 ... Exhaust fan, 7 ... Air supply temperature sensor, 8 ... Refrigerant circulation amount adjusting device (COMP), 9 ... Dew point temperature sensor, 10 ... Temperature sensor, 401 ... Air supply Temperature lower limit value calculation unit, 402 ... device-constrained supply air temperature lower limit value storage unit, 403 ... supply air temperature set value determination unit, 404 ... supply air flow rate set value determination unit, 405 ... COMPINV output unit, 406 ... fan INV output unit 411 ... Supply air temperature lower limit value calculation unit, 412 ... Device-constrained supply air temperature lower limit value storage unit, 413 ... Supply air temperature lower limit value determination unit, 414 ... Required temperature storage unit, 415 ... Supply air temperature set value determination unit, 416 ... Supply air volume setting value determination unit, 41 ... COMPINV output section, 418 ... fan INV output section.

Claims (6)

結露によって物理的損傷を生じる虞がある機器が設置された室を制御対象室とし、この制御対象室への空調機からの給気温度および給気風量を制御する空調制御方法であって、
前記制御対象室の露点温度を測定するステップと、
前記測定された露点温度に基づいて前記制御対象室において結露が発生する虞のない前記給気温度の下限値を算出するステップと、
前記機器を収容したラックへの空気の流入側の温度を現在温度として測定するステップと、
前記測定される現在温度に対する要求温度を記憶しておくステップと、
前記算出された給気温度の下限値と前記測定された現在温度と前記記憶されている要求温度とに基づいて前記給気温度の設定値を決定するステップと、
前記算出された給気温度の下限値と前記測定された現在温度と前記記憶されている要求温度とに基づいて前記給気風量の設定値を決定するステップと
を備えることを特徴とする空調制御方法。 An air conditioning control method for controlling a supply air temperature and an air supply amount from an air conditioner to a room to be controlled, where a room in which equipment that may cause physical damage due to condensation is installed is set as a room to be controlled,
Measuring a dew point temperature of the controlled room;
Calculating a lower limit value of the supply air temperature that does not cause condensation in the control target room based on the measured dew point temperature; and
Measuring the temperature on the air inflow side to the rack containing the equipment as the current temperature;
Storing a required temperature for the measured current temperature;
Determining a set value of the supply air temperature based on a lower limit value of the calculated supply air temperature, the measured current temperature, and the stored required temperature ;
Determining a set value of the supply air volume based on the calculated lower limit value of the supply air temperature, the measured current temperature, and the stored required temperature. Method. 請求項１に記載された空調制御方法において、
前記空調機の能力によって制約される給気温度の下限値を機器制約給気温度下限値とし、この機器制約給気温度下限値と前記算出された給気温度の下限値とを比較し、高い方の値を給気温度の下限値として決定するステップを備え、
前記給気温度の設定値を決定するステップは、
前記決定された給気温度の下限値と前記測定された現在温度と前記記憶されている要求温度とに基づいて前記給気温度の設定値を決定する
ことを特徴とする空調制御方法。 In the air-conditioning control method according to claim 1,
The lower limit value of the supply air temperature restricted by the capacity of the air conditioner is set as the lower limit value of the device restriction supply air temperature. Determining the value of the one as the lower limit value of the supply air temperature,
Determining the set value of the supply air temperature;
An air conditioning control method comprising: determining a set value of the supply air temperature based on a lower limit value of the determined supply air temperature, the measured current temperature, and the stored required temperature . 請求項１又は２に記載された空調制御方法において、
前記制御対象室の露点温度を測定するステップに代えて、前記制御対象室からの排気の露点温度、前記制御対象室へ外気を処理して供給する外調機からの給気の露点温度、外気の露点温度のうち、何れかの露点温度を測定するステップ
を備えることを特徴とする空調制御方法。 In the air-conditioning control method according to claim 1 or 2,
In place of the step of measuring the dew point temperature of the control target room, the dew point temperature of the exhaust gas from the control target room, the dew point temperature of the supply air from the external air conditioner that processes and supplies the outside air to the control target room, the outside air An air conditioning control method comprising the step of measuring any one of the dew point temperatures. 結露によって物理的損傷を生じる虞がある機器が設置された室を制御対象室とし、この制御対象室への空調機からの給気温度および給気風量を制御する空調制御装置であって、
前記制御対象室の露点温度を測定する露点温度測定手段と、
前記測定された露点温度に基づいて前記制御対象室において結露が発生する虞のない前記給気温度の下限値を算出する給気温度下限値算出手段と、
前記機器を収容したラックへの空気の流入側の温度を現在温度として測定する現在温度測定手段と、
前記測定される現在温度に対する要求温度を記憶しておく記憶手段と、
前記算出された給気温度の下限値と前記測定された現在温度と前記記憶されている要求温度とに基づいて前記給気温度の設定値を決定する給気温度設定値決定手段と、
前記算出された給気温度の下限値と前記測定された現在温度と前記記憶されている要求温度とに基づいて前記給気風量の設定値を決定する給気風量設定値決定手段と
を備えることを特徴とする空調制御装置。 An air conditioning control device that controls a supply air temperature and an air supply amount from an air conditioner to a control target room, where a room in which equipment that may cause physical damage due to condensation is installed is set as a control target room,
Dew point temperature measuring means for measuring the dew point temperature of the controlled room;
A supply air temperature lower limit value calculating means for calculating a lower limit value of the supply air temperature without the possibility of dew condensation in the controlled room based on the measured dew point temperature;
Current temperature measuring means for measuring the temperature of the air inflow side to the rack containing the equipment as the current temperature;
Storage means for storing a required temperature for the current temperature to be measured;
A supply air temperature setting value determining means for determining a set value of the supply air temperature based on a lower limit value of the calculated supply air temperature, the measured current temperature, and the stored required temperature ;
Supply air volume setting value determining means for determining a set value of the supply air volume based on the lower limit value of the calculated supply air temperature, the measured current temperature, and the stored required temperature. An air conditioning control device. 請求項４に記載された空調制御装置において、
前記空調機の能力によって制約される給気温度の下限値を機器制約給気温度下限値とし、この機器制約給気温度下限値と前記算出された給気温度の下限値とを比較し、高い方の値を給気温度の下限値として決定する給気温度下限値決定手段を備え、
前記給気温度設定値決定手段は、
前記決定された給気温度の下限値と前記測定された現在温度と前記記憶されている要求温度とに基づいて前記給気温度の設定値を決定する
ことを特徴とする空調制御装置。 In the air conditioning control device according to claim 4,
The lower limit value of the supply air temperature constrained by the capacity of the air conditioner is set as a device-restricted supply air temperature lower limit value, and the device-restricted supply air temperature lower limit value is compared with the calculated lower limit value of the supply air temperature. Supply air temperature lower limit value determining means for determining one value as the lower limit value of the supply air temperature,
The supply air temperature set value determining means includes
An air conditioning control device that determines a set value of the supply air temperature based on a lower limit value of the determined supply air temperature, the measured current temperature, and the stored required temperature . 請求項４又は５に記載された空調制御装置において、
前記制御対象室の露点温度を測定する露点温度測定手段に代えて、前記制御対象室からの排気の露点温度、前記制御対象室へ外気を処理して供給する外調機からの給気の露点温度、外気の露点温度のうち、何れかの露点温度を測定する露点温度測定手段
を備えることを特徴とする空調制御装置。 In the air-conditioning control device according to claim 4 or 5,
Instead of the dew point temperature measuring means for measuring the dew point temperature of the control target room, the dew point temperature of the exhaust from the control target room, the dew point of the supply air from the external air conditioner that processes and supplies the outside air to the control target room An air conditioning control device comprising: dew point temperature measuring means for measuring any one of a temperature and a dew point temperature of outside air.
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