JP7079122B2 - Cooling system - Google Patents

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JP7079122B2
JP7079122B2 JP2018047134A JP2018047134A JP7079122B2 JP 7079122 B2 JP7079122 B2 JP 7079122B2 JP 2018047134 A JP2018047134 A JP 2018047134A JP 2018047134 A JP2018047134 A JP 2018047134A JP 7079122 B2 JP7079122 B2 JP 7079122B2
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heat source
source machine
chilled water
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昌裕 浦田
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Tokyo Gas Co Ltd
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Description

本発明は、複数の熱源機の運転状態を切り換えて使用する冷却システムに関する。 The present invention relates to a cooling system that is used by switching the operating state of a plurality of heat source machines.

特許文献１には、複数の熱源機のうち、所定の負荷熱量に対し最もエネルギー効率がよくなる熱源機の組み合わせを導出し、導出した熱源機の組み合わせで稼働するように、複数の熱源機の運転状態を切り換えることについて開示がある。 In Patent Document 1, among a plurality of heat source machines, a combination of heat source machines having the highest energy efficiency with respect to a predetermined load heat amount is derived, and the operation of the plurality of heat source machines is operated so as to operate with the combination of the derived heat source machines. There is disclosure about switching states.

特開２００８－１５７４９０号公報Japanese Unexamined Patent Publication No. 2008-157490

しかし、特許文献１では、複数の熱源機のうち、所定の熱源機の運転状態が運転停止状態から運転開始状態に切り換わった際に、運転開始状態に切り換わった熱源機から送出される冷水の温度について何ら考慮していない。 However, in Patent Document 1, when the operation state of a predetermined heat source machine is switched from the operation stop state to the operation start state among a plurality of heat source machines, cold water sent from the heat source machine switched to the operation start state is sent. No consideration is given to the temperature of.

運転停止状態から運転開始状態に切り換わった熱源機から送出される冷水の温度は、周囲の環境温度に応じて変化する。例えば、夏場等では、外気温が３５℃に達する場合がある。このように、外気温が高い場合、運転停止状態の熱源機は、外気温に近づくように上昇し、外気温に近い高い温度となる。 The temperature of the cold water sent from the heat source machine that has switched from the operation stopped state to the operation start state changes according to the ambient temperature. For example, in summer or the like, the outside air temperature may reach 35 ° C. As described above, when the outside air temperature is high, the heat source machine in the stopped operation state rises so as to approach the outside air temperature, and becomes a high temperature close to the outside air temperature.

そのため、運転停止状態から運転開始状態に切り換わった直後の熱源機は高い温度となっていることから、設定温度に冷水を冷却することができない。運転停止状態から運転開始状態に切り換わった直後の熱源機から送出される冷水は、他の熱源機から送出される冷水と合流したのち、空調機等の熱負荷装置に供給される。ここで、高温の冷水が他の熱源機から送出される冷水と合流すると、合流した冷水の平均温度が変動するといった問題があった。 Therefore, since the heat source machine immediately after switching from the operation stopped state to the operation start state has a high temperature, the cold water cannot be cooled to the set temperature. The cold water sent from the heat source machine immediately after switching from the operation stopped state to the operation start state merges with the cold water sent from another heat source machine, and then is supplied to a heat load device such as an air conditioner. Here, when the high-temperature cold water merges with the cold water sent from another heat source machine, there is a problem that the average temperature of the merged cold water fluctuates.

本発明は、熱源機から送出される冷水の温度変動を抑制することが可能な冷却システムを提供することを目的とする。 An object of the present invention is to provide a cooling system capable of suppressing temperature fluctuations of cold water sent from a heat source machine.

上記課題を解決するために、本発明の冷却システムは、複数の熱源機と、前記複数の熱源機と接続し、前記複数の熱源機から生成される熱媒体を流通させる複数の熱媒体流路と、前記熱媒体流路の内径より小さい内径を有し、前記複数の熱媒体流路のそれぞれのうち前記熱源機よりも下流側にあるポンプと前記熱源機との間から分岐する複数の分岐路と、前記複数の熱媒体流路のそれぞれのうち前記ポンプよりも下流側に接続され、前記熱媒体流路の内径より小さい内径を有し、前記複数の分岐路が合流する合流路と、前記複数の分岐路にそれぞれ設けられ、前記分岐路を開閉するバルブと、前記バルブの開閉を制御する制御部と、を備え、前記制御部は、前記複数の熱源機のうち、運転開始状態に制御された熱源機と接続する前記熱媒体流路から分岐する前記分岐路に設けられた前記バルブを閉状態に制御し、前記複数の熱源機のうち、運転停止状態に制御された熱源機を運転開始させるまでの時間が所定時間未満である場合、当該運転停止状態の熱源機と接続する前記熱媒体流路から分岐する前記分岐路に設けられた前記バルブを開状態に制御し、前記複数の熱源機のうち、運転停止状態に制御された熱源機を運転開始させるまでの時間が所定時間以上である場合、当該運転停止状態の熱源機と接続する前記熱媒体流路から分岐する前記分岐路に設けられた前記バルブを閉状態に制御する。 In order to solve the above problems, the cooling system of the present invention is connected to a plurality of heat source machines and the plurality of heat source machines, and a plurality of heat medium flow paths for circulating heat media generated from the plurality of heat source machines. A plurality of branches having an inner diameter smaller than the inner diameter of the heat medium flow path and branching from between the pump and the heat source machine on the downstream side of the heat source machine among each of the plurality of heat medium flow paths. A passage, a confluence channel connected to the downstream side of each of the plurality of heat medium flow paths, having an inner diameter smaller than the inner diameter of the heat medium flow path, and the plurality of branch paths merging. Each of the plurality of branch paths is provided with a valve for opening and closing the branch path and a control unit for controlling the opening and closing of the valve, and the control unit is in the operation start state among the plurality of heat source machines. The valve provided in the branch path branching from the heat medium flow path connected to the controlled heat source machine is controlled to be closed, and among the plurality of heat source machines, the heat source machine controlled to be in the stopped state is selected. When the time until the operation is started is less than a predetermined time, the valve provided in the branch path branching from the heat medium flow path connected to the heat source machine in the stopped operation state is controlled to be in the open state, and the plurality of valves are controlled. Of the heat source machines in the above, when the time until the heat source machine controlled to be stopped is started for a predetermined time or more, the branch branching from the heat medium flow path connected to the heat source machine in the stopped state. The valve provided on the road is controlled to be closed .

本発明によれば、熱源機から送出される冷水の温度変動を抑制することができる。 According to the present invention, it is possible to suppress temperature fluctuations of cold water sent from the heat source machine.

冷却システムを説明する図である。It is a figure explaining the cooling system. 本実施形態の冷水温度変動抑制機構の構成を説明するための図である。It is a figure for demonstrating the structure of the chilled water temperature fluctuation suppression mechanism of this embodiment. 変形例の冷水温度変動抑制機構の構成を説明するための図である。It is a figure for demonstrating the structure of the chilled water temperature fluctuation suppression mechanism of a modification.

以下に添付図面を参照しながら、本発明の好適な実施形態について詳細に説明する。かかる実施形態に示す寸法、材料、その他具体的な数値等は、発明の理解を容易とするための例示にすぎず、特に断る場合を除き、本発明を限定するものではない。なお、本明細書および図面において、実質的に同一の機能、構成を有する要素については、同一の符号を付することにより重複説明を省略し、また本発明に直接関係のない要素は図示を省略する。 Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, other specific numerical values, etc. shown in the embodiment are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and the drawings, elements having substantially the same function and configuration are designated by the same reference numerals to omit duplicate description, and elements not directly related to the present invention are not shown. do.

図１は、冷却システム１を説明する図である。図１に示すように、冷却システム１は、冷却装置群１０と、冷水往ヘッダー１２と、負荷側冷水供給路１４と、負荷側冷水ポンプ１６と、負荷バルブ１８と、熱負荷装置２０と、負荷側冷水排出路２２と、冷水還ヘッダー２４とを含んで構成される。 FIG. 1 is a diagram illustrating a cooling system 1. As shown in FIG. 1, the cooling system 1 includes a cooling device group 10, a chilled water forward header 12, a load-side chilled water supply path 14, a load-side chilled water pump 16, a load valve 18, a heat load device 20, and the like. The load-side chilled water discharge passage 22 and the chilled water return header 24 are included.

冷却装置群１０は、熱負荷装置２０に供給するための冷水を生成する。冷水往ヘッダー１２は、冷却装置群１０から送出される冷水が合流する合流部である。負荷側冷水供給路１４は、冷水往ヘッダー１２と、負荷バルブ１８および熱負荷装置２０とを接続し、冷水往ヘッダー１２から負荷バルブ１８および熱負荷装置２０に向かって冷水を供給する。負荷側冷水ポンプ１６は、負荷側冷水供給路１４に設けられ、負荷バルブ１８および熱負荷装置２０に冷水を圧送する。 The cooling device group 10 generates cold water to be supplied to the heat load device 20. The cold water forward header 12 is a confluence portion where cold water sent from the cooling device group 10 joins. The load-side chilled water supply path 14 connects the chilled water forward header 12, the load valve 18, and the heat load device 20, and supplies chilled water from the chilled water forward header 12 toward the load valve 18 and the heat load device 20. The load-side chilled water pump 16 is provided in the load-side chilled water supply path 14, and pumps cold water to the load valve 18 and the heat load device 20.

負荷バルブ１８は、熱負荷装置２０ごとに設けられ、熱負荷装置２０に対して冷水の供給および非供給を切り替える。熱負荷装置２０は、発熱機器や物品を冷却するための熱交換器、または、空気を冷却するための冷房機器等であり、１つまたは複数設けられる。図１に示す例では、熱負荷装置２０は、３つ設けられる。熱負荷装置２０は、負荷バルブ１８を介して負荷側冷水供給路１４に接続されているとともに、負荷側冷水排出路２２に接続されている。 The load valve 18 is provided for each heat load device 20 and switches between supply and non-supply of cold water to the heat load device 20. The heat load device 20 is a heat exchanger for cooling a heat generating device or an article, a cooling device for cooling air, or the like, and is provided with one or more. In the example shown in FIG. 1, three heat load devices 20 are provided. The heat load device 20 is connected to the load side chilled water supply path 14 via the load valve 18 and is also connected to the load side chilled water discharge path 22.

熱負荷装置２０は、負荷側冷水供給路１４から供給された冷水と、発熱機器や物品、または、空気等の冷却対象物との間で熱交換を行い、冷却対象物を冷却する。例えば、熱負荷装置２０は、冷水を用いて冷風を生成する空調機である。負荷側冷水排出路２２は、熱負荷装置２０と、冷水還ヘッダー２４とを接続し、冷却対象物を冷却することで温められた冷水を冷水還ヘッダー２４へ排出する。冷水還ヘッダー２４は、負荷側冷水排出路２２から送られてくる冷水を受け、受けた冷水を冷却装置群１０に分配する分配部である。 The heat load device 20 exchanges heat between the cold water supplied from the load-side chilled water supply path 14 and a cooling object such as a heat generating device, an article, or air to cool the cooling object. For example, the heat load device 20 is an air conditioner that uses cold water to generate cold air. The load-side chilled water discharge path 22 connects the heat load device 20 and the chilled water return header 24, and discharges the chilled water warmed by cooling the object to be cooled to the chilled water return header 24. The cold water return header 24 is a distribution unit that receives cold water sent from the load-side cold water discharge path 22 and distributes the received cold water to the cooling device group 10.

冷却装置群１０は、冷水往ヘッダー１２と接続し、冷水往ヘッダー１２を介して熱負荷装置２０に冷水を供給する。また、冷却装置群１０は、冷水還ヘッダー２４と接続し、冷水還ヘッダー２４を介して熱負荷装置２０から温められた冷水を受け取る。 The cooling device group 10 is connected to the cold water forward header 12 and supplies cold water to the heat load device 20 via the cold water forward header 12. Further, the cooling device group 10 is connected to the cold water return header 24 and receives the warmed cold water from the heat load device 20 via the cold water return header 24.

冷却装置群１０は、複数の冷却装置１００を含んで構成される。複数の冷却装置１００は、それぞれ同じ構成を有する。冷却装置１００は、冷却塔１０２と、冷却水供給路１０４と、冷却水ポンプ１０６と、熱源機１０８と、冷却水排出路１１０と、熱源機側冷水供給路（熱媒体流路）１１２と、熱源機側冷水ポンプ１１４と、熱源機側冷水排出路（熱媒体流路）１１６とを含んで構成される。 The cooling device group 10 includes a plurality of cooling devices 100. The plurality of cooling devices 100 each have the same configuration. The cooling device 100 includes a cooling tower 102, a cooling water supply path 104, a cooling water pump 106, a heat source machine 108, a cooling water discharge path 110, a heat source machine side chilled water supply path (heat medium flow path) 112, and the like. It is configured to include a heat source machine side chilled water pump 114 and a heat source machine side chilled water discharge path (heat medium flow path) 116.

本実施形態では、冷却装置群１０は、４つの冷却装置１００を備えている。そのため、冷却装置群１０は、４つの冷却塔１０２と、４つの冷却水供給路１０４と、４つの冷却水ポンプ１０６と、４つの熱源機１０８と、４つの冷却水排出路１１０と、４つの熱源機側冷水供給路１１２と、４つの熱源機側冷水ポンプ１１４と、４つの熱源機側冷水排出路１１６とを含んで構成される。 In the present embodiment, the cooling device group 10 includes four cooling devices 100. Therefore, the cooling device group 10 includes four cooling towers 102, four cooling water supply passages 104, four cooling water pumps 106, four heat source machines 108, four cooling water discharge passages 110, and four cooling water discharge passages 110. It includes a heat source machine side chilled water supply path 112, four heat source machine side chilled water pumps 114, and four heat source machine side chilled water discharge paths 116.

冷却塔１０２は、大気と冷却水とを熱交換して、熱源機１０８に供給するための冷却水を生成する。冷却塔１０２は、筐体１０２ａ、ノズル群１０２ｂ、冷却ファン１０２ｃ、貯水槽１０２ｄを含んで構成され、ノズル群１０２ｂ、冷却ファン１０２ｃ、貯水槽１０２ｄが筐体１０２ａ内に収容されている。ノズル群１０２ｂは、冷却水排出路１１０に接続され、筐体１０２ａ内に冷却水を散布する。 The cooling tower 102 exchanges heat between the atmosphere and the cooling water to generate cooling water for supplying to the heat source machine 108. The cooling tower 102 includes a housing 102a, a nozzle group 102b, a cooling fan 102c, and a water storage tank 102d, and the nozzle group 102b, a cooling fan 102c, and a water storage tank 102d are housed in the housing 102a. The nozzle group 102b is connected to the cooling water discharge path 110, and the cooling water is sprayed into the housing 102a.

冷却ファン１０２ｃは、筐体１０２ａ内におけるノズル群１０２ｂよりも上方に設けられ、不図示のモータによって回転駆動される。冷却ファン１０２ｃは、回転駆動することにより、ノズル群１０２ｂから散布された冷却水を外空気（外気）に晒して、冷却水を冷却する。そして、ノズル群１０２ｂから散布され、冷却ファン１０２ｃによって外空気に晒されて冷却された冷却水は、筐体１０２ａの下部に設けられた貯水槽１０２ｄ内に貯留される。貯水槽１０２ｄには、冷却水供給路１０４が接続される。 The cooling fan 102c is provided above the nozzle group 102b in the housing 102a and is rotationally driven by a motor (not shown). The cooling fan 102c is driven to rotate to expose the cooling water sprayed from the nozzle group 102b to the outside air (outside air) to cool the cooling water. Then, the cooling water sprayed from the nozzle group 102b and exposed to the outside air by the cooling fan 102c and cooled is stored in the water storage tank 102d provided in the lower part of the housing 102a. A cooling water supply path 104 is connected to the water storage tank 102d.

冷却水供給路１０４は、冷却塔１０２と熱源機１０８とを接続し、冷却塔１０２（貯水槽１０２ｄ）から熱源機１０８に向かって冷却水を供給する。冷却水ポンプ１０６は、冷却水供給路１０４に設けられ、熱源機１０８に冷却水を圧送する。 The cooling water supply path 104 connects the cooling tower 102 and the heat source machine 108, and supplies cooling water from the cooling tower 102 (water storage tank 102d) toward the heat source machine 108. The cooling water pump 106 is provided in the cooling water supply path 104 and pumps the cooling water to the heat source machine 108.

熱源機１０８は、冷却塔１０２から冷却水を受け取り、ヒートポンプの原理により冷水（熱媒体）を冷却し、所定温度（設定温度）の冷水を生成する。本実施形態の熱源機１０８は、冷却水を用いて冷水を生成する冷凍機である。熱源機１０８は、例えば、ターボ冷凍機や吸収式冷凍機等である。熱源機１０８は、冷水を生成する際に発生する熱を冷却水により冷却する。冷却水排出路１１０は、熱源機１０８と冷却塔１０２とを接続し、熱源機１０８で発生する熱を冷却することで温められた冷却水を冷却塔１０２へ排出する。 The heat source machine 108 receives cooling water from the cooling tower 102, cools the cold water (heat medium) according to the principle of the heat pump, and generates cold water having a predetermined temperature (set temperature). The heat source machine 108 of the present embodiment is a refrigerator that generates cold water using cooling water. The heat source machine 108 is, for example, a turbo chiller, an absorption chiller, or the like. The heat source machine 108 cools the heat generated when the cold water is generated by the cooling water. The cooling water discharge path 110 connects the heat source machine 108 and the cooling tower 102, and discharges the cooling water warmed by cooling the heat generated by the heat source machine 108 to the cooling tower 102.

熱源機側冷水供給路１１２は、熱源機１０８と冷水往ヘッダー１２とを接続し、熱源機１０８から冷水往ヘッダー１２に向かって冷水を供給する。熱源機側冷水ポンプ１１４は、熱源機側冷水供給路１１２に設けられ、冷水往ヘッダー１２に冷水を圧送する。熱源機側冷水排出路１１６は、冷水還ヘッダー２４と熱源機１０８とを接続し、冷水還ヘッダー２４から熱源機１０８に向かって冷水を排出する。 The cold water supply path 112 on the heat source machine side connects the heat source machine 108 and the cold water forward header 12, and supplies cold water from the heat source machine 108 toward the cold water forward header 12. The heat source machine side chilled water pump 114 is provided in the heat source machine side chilled water supply path 112, and pumps cold water to the chilled water forward header 12. The cold water discharge path 116 on the heat source machine side connects the cold water return header 24 and the heat source machine 108, and discharges cold water from the cold water return header 24 toward the heat source machine 108.

本実施形態では、冷却装置群１０が４つの冷却装置１００から構成されるため、冷水往ヘッダー１２は、４つの熱源機側冷水供給路１１２と接続する。また、冷水還ヘッダー２４は、４つの熱源機側冷水排出路１１６と接続する。４つの熱源機側冷水供給路１１２、または、４つの熱源機側冷水排出路１１６には、後述する冷水温度変動抑制機構２００（図１では、不図示）が設けられる。 In the present embodiment, since the cooling device group 10 is composed of four cooling devices 100, the chilled water forward header 12 is connected to the four heat source machine side chilled water supply paths 112. Further, the cold water return header 24 is connected to four heat source machine side cold water discharge passages 116. The four heat source machine side chilled water supply paths 112 or the four heat source machine side chilled water discharge paths 116 are provided with a chilled water temperature fluctuation suppressing mechanism 200 (not shown in FIG. 1), which will be described later.

図２は、本実施形態の冷水温度変動抑制機構２００の構成を説明するための図である。図２では、信号の流れを破線で示す。図２に示すように、４つの熱源機１０８と冷水往ヘッダー１２との間には、４つの熱源機側冷水供給路１１２が設けられる。また、４つの熱源機１０８と冷水還ヘッダー２４との間には、４つの熱源機側冷水排出路１１６が設けられる。４つの熱源機側冷水供給路１１２および４つの熱源機側冷水排出路１１６は、複数の熱源機１０８から生成される冷水（熱媒体）を流通させる複数の熱媒体流路として機能する。 FIG. 2 is a diagram for explaining the configuration of the chilled water temperature fluctuation suppressing mechanism 200 of the present embodiment. In FIG. 2, the signal flow is shown by a broken line. As shown in FIG. 2, four heat source machine side chilled water supply paths 112 are provided between the four heat source machines 108 and the chilled water forward header 12. Further, four heat source machine side chilled water discharge passages 116 are provided between the four heat source machines 108 and the chilled water return header 24. The four heat source machine side chilled water supply passages 112 and the four heat source machine side chilled water discharge passages 116 function as a plurality of heat medium flow paths for circulating cold water (heat medium) generated from the plurality of heat source machines 108.

冷水温度変動抑制機構２００は、分岐路２０２と、合流路２０４と、逆止弁２０６と、バルブ２０８と、制御装置２１０とを含んで構成される。 The chilled water temperature fluctuation suppressing mechanism 200 includes a branch path 202, a junction flow path 204, a check valve 206, a valve 208, and a control device 210.

分岐路２０２は、複数の熱源機側冷水供給路１１２のそれぞれから分岐する。本実施形態では、熱源機側冷水供給路１１２が４つ（複数）設けられるため、分岐路２０２は、４つ（複数）設けられる。合流路２０４は、複数の分岐路２０２が合流する合流路である。 The branch path 202 branches from each of the plurality of heat source machine side chilled water supply paths 112. In the present embodiment, since the heat source machine side chilled water supply paths 112 are provided in four (plural), the branch paths 202 are provided in four (plural). The merging flow path 204 is a merging flow path in which a plurality of branch paths 202 merge.

なお、複数の熱源機側冷水供給路１１２と、複数の分岐路２０２と、合流路２０４とは、それぞれ配管により構成される。ここで、複数の分岐路２０２および合流路２０４の内径は、複数の熱源機側冷水供給路１１２の内径よりも小さい。例えば、複数の分岐路２０２および合流路２０４の内径は、複数の熱源機側冷水供給路１１２の内径の１／１０の大きさである。 The plurality of heat source machine side chilled water supply paths 112, the plurality of branch paths 202, and the combined flow path 204 are each composed of pipes. Here, the inner diameters of the plurality of branch paths 202 and the combined flow paths 204 are smaller than the inner diameters of the plurality of heat source machine side chilled water supply paths 112. For example, the inner diameter of the plurality of branch paths 202 and the combined flow path 204 is 1/10 of the inner diameter of the plurality of heat source machine side chilled water supply paths 112.

分岐路２０２は、一端が熱源機側冷水供給路１１２と接続し、他端が合流路２０４と接続する。分岐路２０２の一端は、熱源機側冷水供給路１１２のうち熱源機側冷水ポンプ１１４よりも上流側において、熱源機側冷水供給路１１２と接続（連通）する。換言すれば、分岐路２０２は、熱源機１０８と熱源機側冷水ポンプ１１４との間の熱源機側冷水供給路１１２と接続（連通）する。 One end of the branch path 202 is connected to the heat source machine side chilled water supply path 112, and the other end is connected to the junction flow path 204. One end of the branch path 202 is connected (communicated) with the chilled water supply path 112 on the heat source machine side on the upstream side of the chilled water supply path 112 on the heat source machine side with respect to the chilled water pump 114 on the heat source machine side. In other words, the branch path 202 connects (communicates) with the heat source machine side chilled water supply path 112 between the heat source machine 108 and the heat source machine side chilled water pump 114.

合流路２０４は、複数の熱源機側冷水供給路１１２の全てと連通する。合流路２０４は、熱源機側冷水供給路１１２のうち熱源機側冷水ポンプ１１４よりも下流側において、熱源機側冷水供給路１１２と接続（連通）する。換言すれば、合流路２０４は、熱源機側冷水ポンプ１１４と冷水往ヘッダー１２との間の熱源機側冷水供給路１１２と接続（連通）する。 The communication flow path 204 communicates with all of the plurality of heat source machine side chilled water supply paths 112. The combined flow path 204 connects (communicates) with the chilled water supply path 112 on the heat source machine side on the downstream side of the chilled water supply path 112 on the heat source machine side with respect to the chilled water pump 114 on the heat source machine side. In other words, the combined flow path 204 connects (communicates) with the heat source machine side chilled water supply path 112 between the heat source machine side chilled water pump 114 and the chilled water forward header 12.

逆止弁２０６は、熱源機１０８から冷水往ヘッダー１２に向かって冷水が流れるとき開状態となり、冷水往ヘッダー１２から熱源機１０８に向かって冷水が流れる（すなわち、逆流する）とき閉状態となる。逆止弁２０６は、複数の熱源機側冷水供給路１１２のそれぞれに設けられる。逆止弁２０６は、熱源機側冷水供給路１１２のうち合流路２０４との接続箇所よりも下流側に設けられる。換言すれば、逆止弁２０６は、合流路２０４との接続箇所と冷水往ヘッダー１２との間の熱源機側冷水供給路１１２に設けられる。 The check valve 206 is opened when cold water flows from the heat source machine 108 toward the cold water forward header 12, and is closed when cold water flows (that is, backflows) from the cold water forward header 12 toward the heat source machine 108. .. The check valve 206 is provided in each of the plurality of heat source machine side chilled water supply paths 112. The check valve 206 is provided on the downstream side of the heat source machine side chilled water supply path 112 from the connection point with the junction flow path 204. In other words, the check valve 206 is provided in the heat source machine side chilled water supply path 112 between the connection point with the junction flow path 204 and the chilled water forward header 12.

バルブ２０８は、複数の分岐路２０２のそれぞれに設けられる。バルブ２０８は、分岐路２０２を開閉する。 The valve 208 is provided in each of the plurality of branch paths 202. The valve 208 opens and closes the branch path 202.

制御装置２１０は、中央処理装置（ＣＰＵ）、プログラム等が格納されたＲＯＭ、ワークエリアとしてのＲＡＭ等を含むマイクロコンピュータでなり、冷却システム１全体を統括制御する。制御装置２１０は、バルブ制御部２１２と、熱源機制御部２１４と、冷水ポンプ制御部２１６とを含んで構成される。 The control device 210 is a microcomputer including a central processing unit (CPU), a ROM in which a program or the like is stored, a RAM as a work area, and the like, and controls the entire cooling system 1. The control device 210 includes a valve control unit 212, a heat source machine control unit 214, and a chilled water pump control unit 216.

バルブ制御部２１２は、熱源機１０８の運転状態に応じて、複数のバルブ２０８を開状態または閉状態に制御する。ただし、これに限定されず、バルブ２０８は、手動で開状態または閉状態に駆動されてもよい。バルブ２０８が手動で開閉される場合、バルブ制御部２１２は設けられなくてもよい。なお、バルブ制御部２１２の具体的な制御については後述する。 The valve control unit 212 controls a plurality of valves 208 to be in an open state or a closed state according to the operating state of the heat source machine 108. However, but not limited to this, the valve 208 may be manually driven to the open or closed state. When the valve 208 is manually opened and closed, the valve control unit 212 may not be provided. The specific control of the valve control unit 212 will be described later.

熱源機制御部２１４は、複数の熱源機１０８の駆動（発停）を制御する。熱源機制御部２１４は、熱負荷装置２０に冷水を供給する場合、複数の熱源機１０８のうち０台～全台までの熱源機１０８を駆動させる。このとき、熱源機制御部２１４は、複数の熱源機１０８すべてを駆動させずに、複数の熱源機１０８のうち少なくとも一つの熱源機１０８の駆動を停止させる。 The heat source machine control unit 214 controls the drive (start / stop) of the plurality of heat source machines 108. When supplying cold water to the heat load device 20, the heat source machine control unit 214 drives the heat source machines 108 from 0 to all of the plurality of heat source machines 108. At this time, the heat source machine control unit 214 stops driving at least one of the plurality of heat source machines 108 without driving all of the plurality of heat source machines 108.

これは、熱源機１０８を長時間連続駆動させた場合、長時間連続駆動させた熱源機１０８の機器寿命が短くなったりするおそれがあるためである。そのため、熱源機制御部２１４は、熱源機１０８を駆動させる際に、複数の熱源機１０８のうち少なくとも一つの熱源機１０８の駆動を停止させる。また、熱源機制御部２１４は、複数の熱源機１０８のそれぞれの駆動時間に応じてローテーションで運転させ、駆動させる熱源機１０８と、駆動を停止させる熱源機１０８とを順次変更する。 This is because if the heat source machine 108 is continuously driven for a long time, the life of the heat source machine 108 that has been continuously driven for a long time may be shortened. Therefore, when the heat source machine control unit 214 drives the heat source machine 108, the heat source machine control unit 214 stops driving the heat source machine 108 of at least one of the plurality of heat source machines 108. Further, the heat source machine control unit 214 sequentially changes the heat source machine 108 to be operated and driven by rotation according to the drive time of each of the plurality of heat source machines 108, and the heat source machine 108 to stop the drive.

本実施形態では、熱源機制御部２１４は、熱負荷装置２０に冷水を供給する場合、４つの熱源機１０８のうち、３つの熱源機１０８を駆動させ、１つの熱源機１０８の駆動を停止させる。ただし、これに限定されず、熱源機制御部２１４は、熱負荷装置２０に冷水を供給する場合、４つの熱源機１０８のうち、２つの熱源機１０８を駆動させ、２つの熱源機１０８の駆動を停止させてもよい。また、熱源機制御部２１４は、熱負荷装置２０に冷水を供給する場合、４つの熱源機１０８のうち、１つの熱源機１０８を駆動させ、３つの熱源機１０８の駆動を停止させてもよい。運転自体は０台運転と４台運転も可能であるが、本設備は使用しない。 In the present embodiment, when the heat source machine control unit 214 supplies cold water to the heat load device 20, the heat source machine control unit 214 drives three heat source machines 108 out of the four heat source machines 108 and stops the drive of one heat source machine 108. .. However, the present invention is not limited to this, and when the heat source machine control unit 214 supplies cold water to the heat load device 20, the heat source machine control unit 214 drives two heat source machines 108 out of the four heat source machines 108, and drives two heat source machines 108. May be stopped. Further, when the heat source machine control unit 214 supplies cold water to the heat load device 20, the heat source machine control unit 214 may drive one heat source machine 108 out of the four heat source machines 108 and stop the drive of the three heat source machines 108. .. The operation itself can be 0 or 4 units, but this equipment is not used.

また、熱源機制御部２１４は、熱源機１０８を駆動させる場合、熱源機１０８から送出される冷水の温度が設定温度となるように熱源機１０８を制御する。熱源機１０８は、熱源機制御部２１４により運転状態が運転開始状態に制御されると、設定温度となる冷水の生成を開始する。また、熱源機１０８は、熱源機制御部２１４により運転状態が運転停止状態に制御されると、冷水の生成を停止する。 Further, when the heat source machine 108 is driven, the heat source machine control unit 214 controls the heat source machine 108 so that the temperature of the cold water sent from the heat source machine 108 becomes the set temperature. When the operation state is controlled to the operation start state by the heat source machine control unit 214, the heat source machine 108 starts to generate cold water having a set temperature. Further, the heat source machine 108 stops the generation of cold water when the operation state is controlled to the operation stop state by the heat source machine control unit 214.

以下では、複数の熱源機１０８のうち、熱源機制御部２１４により運転状態が運転開始状態に制御された熱源機１０８を稼働熱源機１０８ともいう。また、複数の熱源機１０８のうち、熱源機制御部２１４により運転状態が運転停止状態に制御された熱源機１０８を非稼働熱源機１０８ともいう。 Hereinafter, among the plurality of heat source machines 108, the heat source machine 108 whose operating state is controlled to the operation start state by the heat source machine control unit 214 is also referred to as an operating heat source machine 108. Further, among the plurality of heat source machines 108, the heat source machine 108 whose operating state is controlled to the stopped state by the heat source machine control unit 214 is also referred to as a non-operating heat source machine 108.

冷水ポンプ制御部２１６は、複数の熱源機側冷水ポンプ１１４の駆動を制御する。冷水ポンプ制御部２１６は、稼働熱源機１０８と接続（連通）される熱源機側冷水ポンプ１１４を駆動するように制御する。冷水ポンプ制御部２１６は、熱源機１０８が運転開始状態である間、熱源機側冷水ポンプ１１４を駆動するように制御する。また、冷水ポンプ制御部２１６は、非稼働熱源機１０８と接続（連通）される熱源機側冷水ポンプ１１４の駆動を停止するように制御する。冷水ポンプ制御部２１６は、熱源機１０８が運転停止状態である間、熱源機側冷水ポンプ１１４の駆動を停止するように制御する。 The chilled water pump control unit 216 controls the drive of a plurality of chilled water pumps 114 on the heat source machine side. The chilled water pump control unit 216 controls to drive the chilled water pump 114 on the heat source machine side connected (communication) with the operating heat source machine 108. The chilled water pump control unit 216 controls to drive the chilled water pump 114 on the heat source machine side while the heat source machine 108 is in the operation start state. Further, the chilled water pump control unit 216 controls to stop the drive of the chilled water pump 114 on the heat source machine side connected (communication) with the non-operating heat source machine 108. The chilled water pump control unit 216 controls so that the drive of the chilled water pump 114 on the heat source machine side is stopped while the heat source machine 108 is in the operation stopped state.

また、冷水ポンプ制御部２１６は、負荷側冷水ポンプ１６の駆動を制御する。冷水ポンプ制御部２１６は、複数の熱源機１０８のうち少なくとも一つの熱源機１０８が運転開始状態である間、負荷側冷水ポンプ１６を駆動するように制御する。また、冷水ポンプ制御部２１６は、複数の熱源機１０８すべてが運転停止状態である間、負荷側冷水ポンプ１６の駆動を停止するように制御する。 Further, the chilled water pump control unit 216 controls the drive of the load-side chilled water pump 16. The chilled water pump control unit 216 controls to drive the load-side chilled water pump 16 while at least one of the plurality of heat source machines 108 is in the operation start state. Further, the chilled water pump control unit 216 controls so that the drive of the load-side chilled water pump 16 is stopped while all of the plurality of heat source machines 108 are in the operation stopped state.

ところで、非稼働熱源機１０８が運転開始状態に切り換わった際に、運転開始直後の稼働熱源機１０８から送出される冷水の温度は、運転開始時から所定時間が経過するまでの間、設定温度とならずに周囲の環境温度に応じた温度となる。例えば、夏場等では、外気温が３５℃に達する場合がある。このように、外気温が高い場合、非稼働熱源機１０８は、外気温に近づくように上昇し、外気温に近い高い温度となる。 By the way, when the non-operating heat source machine 108 is switched to the operation start state, the temperature of the cold water sent from the operating heat source machine 108 immediately after the start of operation is the set temperature from the start of operation until a predetermined time elapses. Instead, the temperature will be adjusted according to the ambient temperature. For example, in summer or the like, the outside air temperature may reach 35 ° C. As described above, when the outside air temperature is high, the non-operating heat source machine 108 rises so as to approach the outside air temperature, and becomes a high temperature close to the outside air temperature.

そのため、運転開始直後の稼働熱源機１０８は高い温度となっていることから、設定温度に冷水を冷却することができない。運転開始直後の稼働熱源機１０８から送出される冷水は、他の稼働熱源機１０８から送出される冷水と冷水往ヘッダー１２で合流したのち、空調機等の熱負荷装置２０に供給される。ここで、高温の冷水が他の稼働熱源機１０８から送出される冷水と冷水往ヘッダー１２で合流すると、合流した冷水の平均温度が変動する。冷水往ヘッダー１２で合流する冷水の平均温度が変動すると、熱負荷装置２０が配された空間に収容された物品等に悪影響を及ぼすおそれがある。 Therefore, since the operating heat source machine 108 immediately after the start of operation has a high temperature, the cold water cannot be cooled to the set temperature. The cold water sent from the operating heat source machine 108 immediately after the start of operation merges with the cold water sent from the other operating heat source machine 108 at the cold water forward header 12, and then is supplied to the heat load device 20 such as an air conditioner. Here, when the high-temperature cold water merges with the cold water sent from the other operating heat source machine 108 at the cold water forward header 12, the average temperature of the merged cold water fluctuates. If the average temperature of the cold water merging in the cold water forward header 12 fluctuates, there is a possibility that the articles and the like housed in the space where the heat load device 20 is arranged may be adversely affected.

そこで、本実施形態の冷却システム１は、稼働熱源機１０８から送出される冷水の温度変動を抑制すべく、冷水温度変動抑制機構２００を含んで構成される。バルブ制御部２１２は、複数のバルブ２０８を制御することで、稼働熱源機１０８から送出される冷水の一部を、非稼働熱源機１０８に供給させる。稼働熱源機１０８から送出される冷水の一部を非稼働熱源機１０８に供給させることで、非稼働熱源機１０８を冷却することができる。以下、本実施形態のバルブ制御部２１２の具体的な制御について説明する。 Therefore, the cooling system 1 of the present embodiment includes a chilled water temperature fluctuation suppressing mechanism 200 in order to suppress the temperature fluctuation of the chilled water sent from the operating heat source machine 108. The valve control unit 212 controls a plurality of valves 208 to supply a part of the cold water sent from the operating heat source machine 108 to the non-operating heat source machine 108. The non-operating heat source machine 108 can be cooled by supplying a part of the cold water sent from the operating heat source machine 108 to the non-operating heat source machine 108. Hereinafter, specific control of the valve control unit 212 of the present embodiment will be described.

バルブ制御部２１２は、複数のバルブ２０８のうち、稼働熱源機１０８と接続する熱源機側冷水供給路１１２から分岐する分岐路２０２に設けられたバルブ（以下、稼働熱源機バルブという）２０８を閉状態に制御する。バルブ制御部２１２は、常時、稼働熱源機バルブ２０８を閉状態に制御する。すなわち、バルブ制御部２１２は、非稼働熱源機１０８を冷却する場合も、非稼働熱源機１０８を冷却しない場合も、稼働熱源機バルブ２０８を閉状態に制御する。 The valve control unit 212 closes the valve (hereinafter referred to as the operating heat source machine valve) 208 provided in the branch path 202 branching from the heat source machine side chilled water supply path 112 connected to the operating heat source machine 108 among the plurality of valves 208. Control to state. The valve control unit 212 constantly controls the operating heat source machine valve 208 in the closed state. That is, the valve control unit 212 controls the operating heat source machine valve 208 to be closed regardless of whether the non-operating heat source machine 108 is cooled or the non-operating heat source machine 108 is not cooled.

また、バルブ制御部２１２は、複数のバルブ２０８のうち、非稼働熱源機１０８と接続する熱源機側冷水供給路１１２から分岐する分岐路２０２に設けられたバルブ（以下、非稼働熱源機バルブという）２０８を閉状態または開状態に制御する。例えば、バルブ制御部２１２は、熱源機制御部２１４が非稼働熱源機１０８を運転開始状態に制御する前に、非稼働熱源機バルブ２０８を開状態に制御する。 Further, the valve control unit 212 is a valve (hereinafter referred to as a non-operating heat source machine valve) provided in the branch path 202 branching from the heat source machine side chilled water supply path 112 connected to the non-operating heat source machine 108 among the plurality of valves 208. ) Control 208 to be closed or open. For example, the valve control unit 212 controls the non-operating heat source machine valve 208 to the open state before the heat source machine control unit 214 controls the non-operating heat source machine 108 to the operation start state.

具体的に、バルブ制御部２１２は、非稼働熱源機１０８を運転開始させるまでの時間が所定時間（例えば、３０分）未満である場合、バルブ２０８を閉状態から開状態に変更するように制御する。換言すれば、バルブ制御部２１２は、非稼働熱源機１０８を運転開始させるまでの時間が所定時間未満である場合、非稼働熱源機バルブ２０８を開状態に制御し、所定時間以上である場合、非稼働熱源機バルブ２０８を閉状態に制御する。 Specifically, the valve control unit 212 controls to change the valve 208 from the closed state to the open state when the time required to start the operation of the non-operating heat source machine 108 is less than a predetermined time (for example, 30 minutes). do. In other words, the valve control unit 212 controls the non-operating heat source machine valve 208 to be in the open state when the time until the non-operating heat source machine 108 is started to operate is less than the predetermined time, and when it is more than the predetermined time, the valve control unit 212 controls the non-operating heat source machine valve 208 to the open state. The non-operating heat source valve 208 is controlled to be closed.

以下、非稼働熱源機１０８を運転開始させるまでの時間が所定時間（例えば、３０分）以上である場合の冷水温度変動抑制機構２００の具体的な動作について説明する。その後、非稼働熱源機１０８を運転開始させるまでの時間が所定時間（例えば、３０分）未満である場合の冷水温度変動抑制機構２００の具体的な動作について説明する。 Hereinafter, the specific operation of the chilled water temperature fluctuation suppressing mechanism 200 when the time until the non-operating heat source machine 108 is started to operate is a predetermined time (for example, 30 minutes) or more will be described. After that, a specific operation of the chilled water temperature fluctuation suppressing mechanism 200 when the time until the non-operating heat source machine 108 is started to operate is less than a predetermined time (for example, 30 minutes) will be described.

非稼働熱源機１０８を運転開始させるまでの時間が所定時間以上である場合、バルブ制御部２１２は、複数のバルブ２０８すべて（すなわち、稼働熱源機バルブ２０８および非稼働熱源機バルブ２０８）を閉状態に制御する。 When the time required to start the operation of the non-operating heat source machine 108 is longer than a predetermined time, the valve control unit 212 closes all the plurality of valves 208 (that is, the operating heat source machine valve 208 and the non-operating heat source machine valve 208). To control.

稼働熱源機１０８により生成された冷水は、熱源機側冷水供給路１１２に送出される。熱源機側冷水ポンプ１１４は、熱源機側冷水供給路１１２に送出された冷水を冷水往ヘッダー１２に圧送する。 The cold water generated by the operating heat source machine 108 is sent to the cold water supply path 112 on the heat source machine side. The heat source machine side chilled water pump 114 pumps the chilled water sent to the heat source machine side chilled water supply path 112 to the chilled water forward header 12.

熱源機側冷水ポンプ１１４により圧送された冷水は、熱源機側冷水供給路１１２と合流路２０４の接続部において、熱源機側冷水供給路１１２を流れる冷水と、合流路２０４を流れる冷水とに分岐する。ところが、合流路２０４を流れる冷水は、分岐路２０２に設けられたすべてのバルブ２０８が閉状態に制御されているため、すべての分岐路２０２内を流通することができない。この場合、非稼働熱源機１０８と熱源機側冷水ポンプ１１４とを接続する熱源機側冷水供給路１１２には、稼働熱源機１０８により生成された冷水が供給されない。 The cold water pumped by the heat source machine side chilled water pump 114 branches into cold water flowing through the heat source machine side chilled water supply path 112 and cold water flowing through the combined flow path 204 at the connection portion between the heat source machine side chilled water supply path 112 and the junction channel 204. do. However, the cold water flowing through the combined flow path 204 cannot flow in all the branch paths 202 because all the valves 208 provided in the branch path 202 are controlled to be closed. In this case, the cold water generated by the operating heat source machine 108 is not supplied to the heat source machine side chilled water supply path 112 connecting the non-operating heat source machine 108 and the heat source machine side chilled water pump 114.

一方、非稼働熱源機１０８を運転開始させるまでの時間が所定時間未満である場合、バルブ制御部２１２は、複数のバルブ２０８のうち、稼働熱源機バルブ２０８を閉状態に制御し、非稼働熱源機バルブ２０８を開状態に制御する。 On the other hand, when the time until the non-operating heat source machine 108 is started to operate is less than a predetermined time, the valve control unit 212 controls the operating heat source machine valve 208 to be in the closed state among the plurality of valves 208, and the non-operating heat source machine 108 is not operated. The machine valve 208 is controlled to be in the open state.

これにより、合流路２０４を流れる冷水は、複数の分岐路２０２のうち、非稼働熱源機バルブ２０８が設けられた分岐路２０２内を流通することができる。このとき、稼働熱源機バルブ２０８が閉状態に制御されているため、合流路２０４を流れる冷水は、稼働熱源機バルブ２０８が設けられた分岐路２０２内を流通することができない。 As a result, the cold water flowing through the combined flow path 204 can flow in the branch path 202 provided with the non-operating heat source machine valve 208 among the plurality of branch paths 202. At this time, since the operating heat source machine valve 208 is controlled to be in the closed state, the cold water flowing through the junction flow path 204 cannot flow in the branch path 202 provided with the operating heat source machine valve 208.

非稼働熱源機バルブ２０８が設けられた分岐路２０２に流入した冷水は、非稼働熱源機１０８と熱源機側冷水ポンプ１１４との間の熱源機側冷水供給路１１２に送出される。 The chilled water flowing into the branch path 202 provided with the non-operating heat source machine valve 208 is sent to the heat source machine side chilled water supply path 112 between the non-operating heat source machine 108 and the heat source machine side chilled water pump 114.

ここで、非稼働熱源機１０８に対し熱源機側冷水供給路１１２を介して接続される熱源機側冷水ポンプ１１４は、冷水ポンプ制御部２１６により運転停止状態に制御されている。熱源機側冷水ポンプ１１４が運転停止状態に制御されていると、冷水は、熱源機側冷水ポンプ１１４から冷水往ヘッダー１２側（図２中、右側）への移動が抑制される。そのため、非稼働熱源機１０８と熱源機側冷水ポンプ１１４との間の熱源機側冷水供給路１１２に送出された冷水は、非稼働熱源機１０８内に流入する。非稼働熱源機１０８内に冷水が流入することにより、非稼働熱源機１０８本体および周辺部材（熱源機側冷水供給路１１２や熱源機側冷水排出路１１６等）が冷却される。 Here, the heat source machine side chilled water pump 114 connected to the non-operating heat source machine 108 via the heat source machine side chilled water supply path 112 is controlled to be in an operation stopped state by the chilled water pump control unit 216. When the heat source machine side chilled water pump 114 is controlled to be in the stopped state, the cold water is suppressed from moving from the heat source machine side chilled water pump 114 to the chilled water forward header 12 side (right side in FIG. 2). Therefore, the chilled water sent to the chilled water supply path 112 on the heat source machine side between the non-operating heat source machine 108 and the chilled water pump 114 on the heat source machine side flows into the non-operating heat source machine 108. The inflow of cold water into the non-operating heat source machine 108 cools the non-operating heat source machine 108 main body and peripheral members (heat source machine side chilled water supply path 112, heat source machine side chilled water discharge path 116, etc.).

本実施形態では、非稼働熱源機１０８を運転開始（運転再開）させる約３０分前から稼働熱源機１０８により生成された冷水を非稼働熱源機１０８に供給させる。これにより、非稼働熱源機１０８の運転開始時までに、非稼働熱源機１０８本体および周辺部材を十分に冷却することができる。非稼働熱源機１０８本体および周辺部材を十分に冷却することで、非稼働熱源機１０８の運転開始時に設定温度となる冷水を生成しやすくすることができる。その結果、稼働熱源機１０８から送出される冷水の温度変動を抑制することができる。 In the present embodiment, the cold water generated by the operating heat source machine 108 is supplied to the non-operating heat source machine 108 from about 30 minutes before the non-operating heat source machine 108 is started (restarted). As a result, the main body of the non-operating heat source machine 108 and peripheral members can be sufficiently cooled by the start of operation of the non-operating heat source machine 108. By sufficiently cooling the non-operating heat source machine 108 main body and peripheral members, it is possible to easily generate cold water having a set temperature at the start of operation of the non-operating heat source machine 108. As a result, the temperature fluctuation of the cold water sent from the operating heat source machine 108 can be suppressed.

なお、熱源機側冷水ポンプ１１４により圧送された冷水の圧力および冷水往ヘッダー１２内の冷水の圧力は、冷水還ヘッダー２４内の冷水の圧力より大きい。そのため、非稼働熱源機バルブ２０８を開状態にした場合、冷水還ヘッダー２４内の冷水は、熱源機側冷水排出路１１６、非稼働熱源機１０８、および、熱源機側冷水供給路１１２を介して、非稼働熱源機バルブ２０８が設けられた分岐路２０２に流入しない。非稼働熱源機バルブ２０８を開状態にした場合、非稼働熱源機バルブ２０８が設けられた分岐路２０２から送出される冷水は、熱源機側冷水供給路１１２、非稼働熱源機１０８、および、熱源機側冷水排出路１１６を介して、冷水還ヘッダー２４内に流入（逆流）する。冷水還ヘッダー２４に流入した冷水は、稼働熱源機１０８に接続される熱源機側冷水排出路１１６に流入する。稼働熱源機１０８に接続される熱源機側冷水排出路１１６に流入した冷水は、稼働熱源機１０８内に流入し、稼働熱源機１０８内で冷却される。 The pressure of the chilled water pumped by the chilled water pump 114 on the heat source machine side and the pressure of the chilled water in the chilled water forward header 12 are larger than the pressure of the chilled water in the chilled water return header 24. Therefore, when the non-operating heat source machine valve 208 is opened, the cold water in the chilled water return header 24 passes through the heat source machine side chilled water discharge path 116, the non-operating heat source machine 108, and the heat source machine side chilled water supply path 112. , The non-operating heat source machine valve 208 does not flow into the branch path 202 provided. When the non-operating heat source machine valve 208 is opened, the cold water sent from the branch path 202 provided with the non-operating heat source machine valve 208 is the heat source machine side chilled water supply path 112, the non-operating heat source machine 108, and the heat source. It flows into (backflow) into the cold water return header 24 via the machine-side cold water discharge path 116. The chilled water that has flowed into the chilled water return header 24 flows into the chilled water discharge path 116 on the heat source machine side that is connected to the operating heat source machine 108. The chilled water that has flowed into the chilled water discharge path 116 on the heat source machine side connected to the operating heat source machine 108 flows into the operating heat source machine 108 and is cooled in the operating heat source machine 108.

本実施形態によれば、冷却システム１は、冷水温度変動抑制機構２００を含んで構成される。バルブ制御部２１２は、複数のバルブ２０８を制御することで、稼働熱源機１０８から送出される冷水の一部を、非稼働熱源機１０８に供給させる。稼働熱源機１０８から送出される冷水の一部を非稼働熱源機１０８に供給させることで、非稼働熱源機１０８を冷却することができる。その結果、稼働熱源機１０８から送出される冷水の温度変動を抑制することができる。 According to the present embodiment, the cooling system 1 includes a chilled water temperature fluctuation suppressing mechanism 200. The valve control unit 212 controls a plurality of valves 208 to supply a part of the cold water sent from the operating heat source machine 108 to the non-operating heat source machine 108. The non-operating heat source machine 108 can be cooled by supplying a part of the cold water sent from the operating heat source machine 108 to the non-operating heat source machine 108. As a result, the temperature fluctuation of the cold water sent from the operating heat source machine 108 can be suppressed.

（変形例）
図３は、変形例の冷水温度変動抑制機構３００の構成を説明するための図である。図３では、信号の流れを破線で示す。上記実施形態の冷水温度変動抑制機構２００と実質的に等しい構成要素については、同一の符号を付して説明を省略する。 (Modification example)
FIG. 3 is a diagram for explaining the configuration of the cold water temperature fluctuation suppressing mechanism 300 of the modified example. In FIG. 3, the signal flow is shown by a broken line. The components substantially the same as those of the cold water temperature fluctuation suppressing mechanism 200 of the above embodiment are designated by the same reference numerals, and the description thereof will be omitted.

変形例の冷水温度変動抑制機構３００は、４つの熱源機側冷水排出路１１６側に設けられる点で、上記実施形態の冷水温度変動抑制機構２００と相違する。また、本変形例の熱源機側冷水ポンプ３１４は、熱源機側冷水排出路１１６に設けられている点で、上記実施形態の熱源機側冷水ポンプ１１４と相違する。以下、本変形例の冷水温度変動抑制機構３００について説明する。 The chilled water temperature fluctuation suppressing mechanism 300 of the modified example is different from the chilled water temperature fluctuation suppressing mechanism 200 of the above embodiment in that it is provided on the four heat source machine side chilled water discharge passages 116 side. Further, the heat source machine side chilled water pump 314 of this modification is different from the heat source machine side chilled water pump 114 of the above embodiment in that it is provided in the heat source machine side chilled water discharge passage 116. Hereinafter, the cold water temperature fluctuation suppressing mechanism 300 of this modification will be described.

冷水温度変動抑制機構３００は、分岐路３０２と、合流路３０４と、逆止弁３０６と、バルブ２０８と、制御装置２１０とを含んで構成される。 The chilled water temperature fluctuation suppressing mechanism 300 includes a branch path 302, a junction flow path 304, a check valve 306, a valve 208, and a control device 210.

分岐路３０２は、複数の熱源機側冷水排出路１１６のそれぞれから分岐する。本変形例では、熱源機側冷水排出路１１６が４つ（複数）設けられるため、分岐路３０２は、４つ（複数）設けられる。合流路３０４は、複数の分岐路３０２が合流する合流路である。 The branch path 302 branches from each of the plurality of heat source machine side chilled water discharge paths 116. In this modification, since the heat source machine side chilled water discharge passages 116 are provided in four (plurality), the branch passages 302 are provided in four (plurality). The merging flow path 304 is a merging flow path in which a plurality of branch paths 302 merge.

なお、複数の熱源機側冷水排出路１１６と、複数の分岐路３０２と、合流路３０４とは、それぞれ配管により構成される。ここで、複数の分岐路３０２および合流路３０４の内径は、複数の熱源機側冷水排出路１１６の内径よりも小さい。例えば、複数の分岐路３０２および合流路３０４の内径は、複数の熱源機側冷水排出路１１６の内径の１／１０の大きさである。 The plurality of heat source machine side chilled water discharge passages 116, the plurality of branch passages 302, and the junction flow path 304 are each composed of pipes. Here, the inner diameters of the plurality of branch paths 302 and the combined flow paths 304 are smaller than the inner diameters of the plurality of heat source machine side chilled water discharge paths 116. For example, the inner diameters of the plurality of branch paths 302 and the combined flow path 304 are 1/10 of the inner diameters of the plurality of heat source machine side chilled water discharge paths 116.

分岐路３０２は、一端が熱源機側冷水排出路１１６と接続し、他端が合流路３０４と接続する。分岐路３０２の一端は、熱源機側冷水排出路１１６のうち熱源機側冷水ポンプ３１４よりも下流側において、熱源機側冷水排出路１１６と接続（連通）する。換言すれば、分岐路３０２は、熱源機１０８と熱源機側冷水ポンプ３１４との間の熱源機側冷水排出路１１６と接続（連通）する。 One end of the branch path 302 is connected to the heat source machine side chilled water discharge path 116, and the other end is connected to the junction flow path 304. One end of the branch path 302 is connected (communicated) with the chilled water discharge path 116 on the heat source machine side on the downstream side of the chilled water discharge path 116 on the heat source machine side with respect to the chilled water pump 314 on the heat source machine side. In other words, the branch path 302 connects (communicates) with the heat source machine side chilled water discharge path 116 between the heat source machine 108 and the heat source machine side chilled water pump 314.

本変形例では、合流路３０４は、複数の熱源機側冷水排出路１１６のいずれとも接続（連通）しない。合流路３０４は、複数の分岐路３０２のすべての他端と接続することで、複数の分岐路３０２を連通させる。 In this modification, the combined flow path 304 is not connected (communicated) with any of the plurality of heat source machine side chilled water discharge passages 116. The combined flow path 304 communicates with the plurality of branch paths 302 by connecting to all the other ends of the plurality of branch paths 302.

逆止弁３０６は、冷水還ヘッダー２４から熱源機１０８に向かって冷水が流れるとき開状態となり、熱源機１０８から冷水還ヘッダー２４に向かって冷水が流れる（すなわち、逆流する）とき閉状態となる。逆止弁３０６は、複数の熱源機側冷水排出路１１６のそれぞれに設けられる。逆止弁３０６は、熱源機側冷水排出路１１６のうち分岐路３０２よりも上流側に設けられる。換言すれば、逆止弁３０６は、熱源機側冷水排出路１１６のうち分岐路３０２との接続箇所と熱源機側冷水ポンプ１１４（あるいは、冷水還ヘッダー２４）の間の熱源機側冷水排出路１１６に設けられる。 The check valve 306 is opened when cold water flows from the cold water return header 24 toward the heat source machine 108, and is closed when cold water flows (that is, backflows) from the heat source machine 108 toward the cold water return header 24. .. The check valve 306 is provided in each of the plurality of heat source machine side chilled water discharge passages 116. The check valve 306 is provided on the upstream side of the chilled water discharge path 116 on the heat source machine side with respect to the branch path 302. In other words, the check valve 306 is a heat source machine side chilled water discharge path between the connection point with the branch path 302 of the heat source machine side chilled water discharge path 116 and the heat source machine side chilled water pump 114 (or the chilled water return header 24). It is provided in 116.

熱源機側冷水ポンプ３１４は、逆止弁３０６と冷水還ヘッダー２４との間の熱源機側冷水排出路１１６に設けられる。 The heat source machine side chilled water pump 314 is provided in the heat source machine side chilled water discharge path 116 between the check valve 306 and the chilled water return header 24.

冷水ポンプ制御部２１６は、複数の熱源機側冷水ポンプ３１４の駆動を制御する。冷水ポンプ制御部２１６は、稼働熱源機１０８と接続（連通）される熱源機側冷水ポンプ３１４を駆動するように制御する。熱源機側冷水ポンプ３１４は、冷水ポンプ制御部２１６により運転開始状態に制御されると、冷水還ヘッダー２４から熱源機１０８に向かって冷水を供給するように駆動する。また、冷水ポンプ制御部２１６は、非稼働熱源機１０８と接続（連通）される熱源機側冷水ポンプ３１４の駆動を停止するように制御する。熱源機側冷水ポンプ３１４は、冷水ポンプ制御部２１６により運転停止状態に制御されると、駆動を停止する。 The chilled water pump control unit 216 controls the drive of a plurality of chilled water pumps 314 on the heat source machine side. The chilled water pump control unit 216 controls to drive the chilled water pump 314 on the heat source machine side connected (communication) with the operating heat source machine 108. When the chilled water pump 314 on the heat source machine side is controlled to the operation start state by the chilled water pump control unit 216, the chilled water pump 314 is driven to supply cold water from the chilled water return header 24 toward the heat source machine 108. Further, the chilled water pump control unit 216 controls to stop the drive of the chilled water pump 314 on the heat source machine side connected (communication) with the non-operating heat source machine 108. When the operation of the chilled water pump 314 on the heat source machine side is controlled by the chilled water pump control unit 216, the drive of the chilled water pump 314 is stopped.

以下、非稼働熱源機１０８を運転開始させるまでの時間が所定時間（例えば、３０分）以上である場合の冷水温度変動抑制機構３００の具体的な動作について説明する。その後、非稼働熱源機１０８を運転開始させるまでの時間が所定時間（例えば、３０分）未満である場合の冷水温度変動抑制機構３００の具体的な動作について説明する。 Hereinafter, the specific operation of the chilled water temperature fluctuation suppressing mechanism 300 when the time until the non-operating heat source machine 108 is started to operate is a predetermined time (for example, 30 minutes) or more will be described. After that, a specific operation of the chilled water temperature fluctuation suppressing mechanism 300 when the time until the non-operating heat source machine 108 is started to operate is less than a predetermined time (for example, 30 minutes) will be described.

非稼働熱源機１０８を運転開始させるまでの時間が所定時間以上である場合、バルブ制御部２１２は、複数のバルブ２０８すべて（すなわち、稼働熱源機バルブ２０８および非稼働熱源機バルブ２０８）を閉状態に制御する。 When the time required to start the operation of the non-operating heat source machine 108 is longer than a predetermined time, the valve control unit 212 closes all the plurality of valves 208 (that is, the operating heat source machine valve 208 and the non-operating heat source machine valve 208). To control.

稼働熱源機１０８により生成された冷水は、熱源機側冷水供給路１１２、冷水往ヘッダー１２、負荷側冷水供給路１４、熱負荷装置２０、負荷側冷水排出路２２、および、冷水還ヘッダー２４を介して、熱源機側冷水排出路１１６に送出される。熱源機側冷水ポンプ３１４は、熱源機側冷水排出路１１６に送出された冷水を非稼働熱源機１０８に圧送する。 The cold water generated by the operating heat source machine 108 includes a heat source machine side chilled water supply path 112, a chilled water forward header 12, a load side chilled water supply path 14, a heat load device 20, a load side chilled water discharge path 22, and a chilled water return header 24. It is sent to the cold water discharge passage 116 on the heat source machine side via the heat source machine. The heat source machine side chilled water pump 314 pumps the chilled water sent to the heat source machine side chilled water discharge passage 116 to the non-operating heat source machine 108.

熱源機側冷水ポンプ３１４により圧送された冷水は、熱源機側冷水排出路１１６と分岐路３０２の接続部に到達する。ところが、分岐路３０２に設けられたすべてのバルブ２０８が閉状態に制御されているため、熱源機側冷水排出路１１６と分岐路３０２の接続部に到達した冷水は、分岐路３０２内を流通することができない。また、非稼働熱源機１０８と接続する熱源機側冷水排出路１１６に設けられた熱源機側冷水ポンプ３１４は、駆動が停止させられているため、冷水還ヘッダー２４から非稼働熱源機１０８に向かう冷水の流れが抑制される。この場合、非稼働熱源機１０８と熱源機側冷水ポンプ１１４とを接続する熱源機側冷水排出路１１６には、稼働熱源機１０８により生成された冷水が供給されない。 The cold water pumped by the heat source machine side chilled water pump 314 reaches the connection portion between the heat source machine side chilled water discharge path 116 and the branch path 302. However, since all the valves 208 provided in the branch path 302 are controlled to be closed, the cold water that reaches the connection portion between the heat source machine side chilled water discharge path 116 and the branch path 302 circulates in the branch path 302. I can't. Further, since the drive of the heat source machine side chilled water pump 314 provided in the heat source machine side chilled water discharge path 116 connected to the non-operating heat source machine 108 is stopped, the chilled water return header 24 heads toward the non-operating heat source machine 108. The flow of cold water is suppressed. In this case, the cold water generated by the operating heat source machine 108 is not supplied to the heat source machine side chilled water discharge path 116 that connects the non-operating heat source machine 108 and the heat source machine side chilled water pump 114.

一方、非稼働熱源機１０８を運転開始させるまでの時間が所定時間未満である場合、バルブ制御部２１２は、複数のバルブ２０８のすべて（すなわち、稼働熱源機バルブ２０８および非稼働熱源機バルブ２０８）を開状態に制御する。 On the other hand, when the time until the non-operating heat source machine 108 is started to operate is less than a predetermined time, the valve control unit 212 uses all of the plurality of valves 208 (that is, the operating heat source machine valve 208 and the non-operating heat source machine valve 208). Is controlled to the open state.

これにより、熱源機側冷水排出路１１６と分岐路３０２の接続部に到達した冷水は、分岐路３０２内を流通することができる。分岐路３０２内を流通する冷水は、合流路３０４に流入する。このとき、稼働熱源機バルブ２０８が設けられた分岐路３０２には、駆動中の熱源機側冷水ポンプ３１４により圧送された圧力の高い冷水が流入する。そのため、合流路３０４に流入した冷水は、稼働熱源機バルブ２０８が設けられた分岐路３０２から非稼働熱源機バルブ２０８が設けられた分岐路３０２に向かって流れる。 As a result, the cold water that has reached the connection portion between the cold water discharge path 116 on the heat source machine side and the branch path 302 can circulate in the branch path 302. The cold water flowing in the branch passage 302 flows into the junction flow path 304. At this time, the high-pressure chilled water pumped by the chilled water pump 314 on the heat source machine side being driven flows into the branch path 302 provided with the operating heat source machine valve 208. Therefore, the cold water flowing into the combined flow path 304 flows from the branch path 302 provided with the operating heat source machine valve 208 toward the branch path 302 provided with the non-operating heat source machine valve 208.

非稼働熱源機バルブ２０８が設けられた分岐路３０２に流入した冷水は、非稼働熱源機１０８と熱源機側冷水ポンプ３１４との間の熱源機側冷水排出路１１６に送出される。 The chilled water flowing into the branch path 302 provided with the non-operating heat source machine valve 208 is sent to the heat source machine side chilled water discharge path 116 between the non-operating heat source machine 108 and the heat source machine side chilled water pump 314.

ここで、逆止弁３０６は、非稼働熱源機１０８と熱源機側冷水ポンプ３１４との間の熱源機側冷水排出路１１６に流入した冷水が、冷水還ヘッダー２４に向かって流れることを防止する。そのため、非稼働熱源機１０８と熱源機側冷水ポンプ３１４との間の熱源機側冷水排出路１１６に流入した冷水は、非稼働熱源機１０８に向かって流れ、非稼働熱源機１０８内に流入する。非稼働熱源機１０８内に冷水が流入することにより、非稼働熱源機１０８本体および周辺部材（熱源機側冷水供給路１１２や熱源機側冷水排出路１１６等）が冷却される。 Here, the check valve 306 prevents the chilled water flowing into the chilled water discharge path 116 on the heat source machine side between the non-operating heat source machine 108 and the chilled water pump 314 on the heat source machine side from flowing toward the chilled water return header 24. .. Therefore, the chilled water that has flowed into the chilled water discharge path 116 on the heat source machine side between the non-operating heat source machine 108 and the chilled water pump 314 on the heat source machine side flows toward the non-operating heat source machine 108 and flows into the non-operating heat source machine 108. .. The inflow of cold water into the non-operating heat source machine 108 cools the non-operating heat source machine 108 main body and peripheral members (heat source machine side chilled water supply path 112, heat source machine side chilled water discharge path 116, etc.).

本変形例では、非稼働熱源機１０８を運転開始（運転再開）させる約３０分前から稼働熱源機１０８により生成された冷水を非稼働熱源機１０８に供給させる。これにより、非稼働熱源機１０８の運転開始時までに、非稼働熱源機１０８本体および周辺部材を十分に冷却することができる。非稼働熱源機１０８本体および周辺部材を十分に冷却することで、非稼働熱源機１０８の運転開始時に設定温度となる冷水を生成しやすくすることができる。その結果、稼働熱源機１０８から送出される冷水の温度変動を抑制することができる。 In this modification, the cold water generated by the operating heat source machine 108 is supplied to the non-operating heat source machine 108 from about 30 minutes before the non-operating heat source machine 108 is started (restarted). As a result, the main body of the non-operating heat source machine 108 and peripheral members can be sufficiently cooled by the start of operation of the non-operating heat source machine 108. By sufficiently cooling the non-operating heat source machine 108 main body and peripheral members, it is possible to easily generate cold water having a set temperature at the start of operation of the non-operating heat source machine 108. As a result, the temperature fluctuation of the cold water sent from the operating heat source machine 108 can be suppressed.

なお、熱源機側冷水ポンプ３１４により圧送された冷水の圧力は、冷水往ヘッダー１２内の冷水の圧力より大きい。そのため、非稼働熱源機バルブ２０８を開状態にした場合、冷水往ヘッダー１２内の冷水は、熱源機側冷水供給路１１２、非稼働熱源機１０８、および、熱源機側冷水排出路１１６を介して、非稼働熱源機バルブ２０８が設けられた分岐路３０２に流入（逆流）しない。非稼働熱源機バルブ２０８を開状態にした場合、非稼働熱源機バルブ２０８が設けられた分岐路３０２から送出される冷水は、熱源機側冷水排出路１１６、非稼働熱源機１０８、および、熱源機側冷水供給路１１２を介して、冷水往ヘッダー１２内に流入する。 The pressure of the chilled water pumped by the chilled water pump 314 on the heat source machine side is larger than the pressure of the chilled water in the chilled water forward header 12. Therefore, when the non-operating heat source machine valve 208 is opened, the cold water in the cold water forward header 12 passes through the heat source machine side chilled water supply path 112, the non-operating heat source machine 108, and the heat source machine side chilled water discharge path 116. , Does not flow into (backflow) the branch path 302 provided with the non-operating heat source valve 208. When the non-operating heat source machine valve 208 is opened, the cold water sent from the branch path 302 provided with the non-operating heat source machine valve 208 is the heat source machine side chilled water discharge path 116, the non-operating heat source machine 108, and the heat source. It flows into the cold water forward header 12 via the machine-side cold water supply path 112.

ここで、上述したように、分岐路３０２の内径は、複数の熱源機側冷水排出路１１６の内径の１／１０の大きさである。したがって、非稼働熱源機１０８内から熱源機側冷水供給路１１２に流出する水の流量は、稼働熱源機１０８内から熱源機側冷水供給路１１２に流出する冷水の流量の約１／１００となる。そのため、非稼働熱源機１０８により温められた冷水が冷水往ヘッダー１２内に流入しても、冷水往ヘッダー１２内の冷水の温度変動を小さくすることができる。 Here, as described above, the inner diameter of the branch path 302 is 1/10 of the inner diameter of the plurality of heat source machine side chilled water discharge paths 116. Therefore, the flow rate of the water flowing out from the non-operating heat source machine 108 to the chilled water supply path 112 on the heat source machine side is about 1/100 of the flow rate of the chilled water flowing out from the inside of the operating heat source machine 108 to the chilled water supply path 112 on the heat source machine side. .. Therefore, even if the cold water warmed by the non-operating heat source machine 108 flows into the cold water forward header 12, the temperature fluctuation of the cold water in the cold water forward header 12 can be reduced.

冷水往ヘッダー１２に流入した冷水は、負荷側冷水供給路１４、熱負荷装置２０、負荷側冷水排出路２２、冷水還ヘッダー２４、熱源機側冷水排出路１１６を介して、稼働熱源機１０８内に流入する。稼働熱源機１０８に流入した冷水は、稼働熱源機１０８内で冷却される。 The chilled water flowing into the chilled water forward header 12 passes through the load side chilled water supply path 14, the heat load device 20, the load side chilled water discharge path 22, the chilled water return header 24, and the heat source machine side chilled water discharge path 116, and is inside the operating heat source machine 108. Inflow to. The cold water that has flowed into the operating heat source machine 108 is cooled in the operating heat source machine 108.

本変形例によれば、冷却システム１は、冷水温度変動抑制機構３００を含んで構成される。バルブ制御部２１２は、複数のバルブ２０８を制御することで、稼働熱源機１０８から送出される冷水の一部を、非稼働熱源機１０８に供給させる。稼働熱源機１０８から送出される冷水の一部を非稼働熱源機１０８に供給させることで、非稼働熱源機１０８を冷却することができる。その結果、稼働熱源機１０８から送出される冷水の温度変動を抑制することができる。 According to this modification, the cooling system 1 includes a chilled water temperature fluctuation suppressing mechanism 300. The valve control unit 212 controls a plurality of valves 208 to supply a part of the cold water sent from the operating heat source machine 108 to the non-operating heat source machine 108. The non-operating heat source machine 108 can be cooled by supplying a part of the cold water sent from the operating heat source machine 108 to the non-operating heat source machine 108. As a result, the temperature fluctuation of the cold water sent from the operating heat source machine 108 can be suppressed.

以上、添付図面を参照しながら本発明の好適な実施形態について説明したが、本発明はかかる実施形態に限定されないことは言うまでもない。当業者であれば、特許請求の範囲に記載された範疇内において、各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。 Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such an embodiment. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood.

上記実施形態および変形例では、熱源機１０８が熱媒体（冷水）を冷却する場合の例を示した。しかし、これに限定されず、熱源機１０８は、熱媒体（温水）を加熱してもよい。 In the above-described embodiment and modification, an example in which the heat source machine 108 cools the heat medium (cold water) is shown. However, the heat source machine 108 may heat the heat medium (hot water) without being limited to this.

また、上記実施形態および変形例では、複数の冷却装置１００は、それぞれ同じ構成を有する例について説明した。しかし、これに限定されず、複数の冷却装置１００は、互いに異なっていてもよい。ただし、冷却装置１００は、少なくとも熱源機１０８と、熱源機側冷水供給路１１２と、熱源機側冷水ポンプ１１４、３１４と、熱源機側冷水排出路１１６とを含んで構成される。 Further, in the above-described embodiment and modified example, an example in which the plurality of cooling devices 100 each have the same configuration has been described. However, the present invention is not limited to this, and the plurality of cooling devices 100 may be different from each other. However, the cooling device 100 includes at least a heat source machine 108, a heat source machine side chilled water supply path 112, a heat source machine side chilled water pump 114, 314, and a heat source machine side chilled water discharge path 116.

また、上記実施形態では、バルブ制御部２１２は、非稼働熱源機１０８を運転開始させるまでの時間に応じて、バルブ２０８の開閉を制御する例について説明した。しかし、これに限定されず、バルブ制御部２１２は、常時、非稼働熱源機バルブ２０８を開状態に制御するようにしてもよい。また、バルブ制御部２１２は、バルブ２０８を開状態に制御する際、バルブ２０８の開度を制御するようにしてもよい。バルブ２０８の開度を制御することで、分岐路２０２から送出される冷水の量を制御することができる。 Further, in the above embodiment, an example in which the valve control unit 212 controls the opening and closing of the valve 208 according to the time until the non-operating heat source machine 108 is started to operate has been described. However, the present invention is not limited to this, and the valve control unit 212 may constantly control the non-operating heat source machine valve 208 in the open state. Further, the valve control unit 212 may control the opening degree of the valve 208 when controlling the valve 208 in the open state. By controlling the opening degree of the valve 208, it is possible to control the amount of cold water delivered from the branch path 202.

また、バルブ制御部２１２は、非稼働熱源機１０８が複数台ある場合、非稼働熱源機バルブのすべてを開状態に制御しなくともよい。例えば、バルブ制御部２１２は、複数の非稼働熱源機１０８のうち、運転停止状態から運転開始状態に制御される非稼働熱源機１０８と接続する熱源機側冷水排出路１１６から分岐する分岐路２０２に設けられたバルブ２０８を開状態に制御する。一方、バルブ制御部２１２は、複数の非稼働熱源機１０８のうち、運転停止状態が維持される非稼働熱源機１０８と接続する熱源機側冷水排出路１１６から分岐する分岐路２０２に設けられたバルブ２０８を閉状態に制御する。 Further, when there are a plurality of non-operating heat source machine 108s, the valve control unit 212 does not have to control all the non-operating heat source machine valves to the open state. For example, the valve control unit 212 is a branch path 202 that branches from the chilled water discharge path 116 on the heat source machine side connected to the non-operating heat source machine 108 controlled from the stopped state to the started state among the plurality of non-operating heat source machines 108. The valve 208 provided in the above is controlled to be in an open state. On the other hand, the valve control unit 212 is provided in the branch path 202 branching from the heat source machine side chilled water discharge path 116 connected to the non-operating heat source machine 108 in which the operation is maintained, among the plurality of non-operating heat source machines 108. The valve 208 is controlled to be closed.

また、上記変形例では、バルブ制御部２１２は、非稼働熱源機１０８を運転開始させるまでの時間に応じて、バルブ２０８の開閉を制御する例について説明した。しかし、これに限定されず、バルブ制御部２１２は、常時、複数のバルブ２０８のすべてを開状態に制御するようにしてもよい。また、バルブ制御部２１２は、バルブ２０８を開状態に制御する際、バルブ２０８の開度を制御するようにしてもよい。バルブ２０８の開度を制御することで、分岐路３０２から送出される冷水の量を制御することができる。 Further, in the above modification, an example in which the valve control unit 212 controls the opening and closing of the valve 208 according to the time until the non-operating heat source machine 108 is started to operate has been described. However, the present invention is not limited to this, and the valve control unit 212 may constantly control all of the plurality of valves 208 in the open state. Further, the valve control unit 212 may control the opening degree of the valve 208 when controlling the valve 208 in the open state. By controlling the opening degree of the valve 208, it is possible to control the amount of cold water delivered from the branch path 302.

また、バルブ制御部２１２は、非稼働熱源機１０８が複数台ある場合、複数のバルブ２０８のすべてを開状態に制御しなくともよい。例えば、バルブ制御部２１２は、複数の非稼働熱源機１０８のうち、運転停止状態から運転開始状態に制御される非稼働熱源機１０８と接続する熱源機側冷水排出路１１６から分岐する分岐路３０２に設けられたバルブ２０８を開状態に制御する。一方、バルブ制御部２１２は、複数の非稼働熱源機１０８のうち、運転停止状態が維持される非稼働熱源機１０８と接続する熱源機側冷水排出路１１６から分岐する分岐路３０２に設けられたバルブ２０８を閉状態に制御する。 Further, when there are a plurality of non-operating heat source machines 108, the valve control unit 212 does not have to control all of the plurality of valves 208 in the open state. For example, the valve control unit 212 is a branch path 302 that branches from the chilled water discharge path 116 on the heat source machine side connected to the non-operating heat source machine 108 controlled from the stopped state to the started state among the plurality of non-operating heat source machines 108. The valve 208 provided in the above is controlled to be in an open state. On the other hand, the valve control unit 212 is provided in the branch path 302 branching from the chilled water discharge path 116 on the heat source machine side connected to the non-operating heat source machine 108 in which the operation is maintained, among the plurality of non-operating heat source machines 108. The valve 208 is controlled to be closed.

本発明は、冷却システムに利用することができる。 The present invention can be used in cooling systems.

１ 冷却システム
１０８ 熱源機
１１２ 熱源機側冷水供給路（熱媒体流路）
１１４、３１４ 熱源機側冷水ポンプ
１１６ 熱源機側冷水排出路（熱媒体流路）
２０２、３０２ 分岐路
２０４、３０４ 合流路
２０８ バルブ
２１２ バルブ制御部（制御部） 1 Cooling system 108 Heat source machine 112 Heat source machine side chilled water supply path (heat medium flow path)
114, 314 Heat source machine side chilled water pump 116 Heat source machine side chilled water discharge path (heat medium flow path)
202, 302 Branch road 204, 304 Combined flow path 208 Valve 212 Valve control unit (control unit)

Claims (1)

複数の熱源機と、
前記複数の熱源機と接続し、前記複数の熱源機から生成される熱媒体を流通させる複数の熱媒体流路と、
前記熱媒体流路の内径より小さい内径を有し、前記複数の熱媒体流路のそれぞれのうち前記熱源機よりも下流側にあるポンプと前記熱源機との間から分岐する複数の分岐路と、
前記複数の熱媒体流路のそれぞれのうち前記ポンプよりも下流側に接続され、前記熱媒体流路の内径より小さい内径を有し、前記複数の分岐路が合流する合流路と、
前記複数の分岐路にそれぞれ設けられ、前記分岐路を開閉するバルブと、
前記バルブの開閉を制御する制御部と、
を備え、
前記制御部は、
前記複数の熱源機のうち、運転開始状態に制御された熱源機と接続する前記熱媒体流路から分岐する前記分岐路に設けられた前記バルブを閉状態に制御し、
前記複数の熱源機のうち、運転停止状態に制御された熱源機を運転開始させるまでの時間が所定時間未満である場合、当該運転停止状態の熱源機と接続する前記熱媒体流路から分岐する前記分岐路に設けられた前記バルブを開状態に制御し、
前記複数の熱源機のうち、運転停止状態に制御された熱源機を運転開始させるまでの時間が所定時間以上である場合、当該運転停止状態の熱源機と接続する前記熱媒体流路から分岐する前記分岐路に設けられた前記バルブを閉状態に制御する、
冷却システム。 With multiple heat source machines,
A plurality of heat medium flow paths that are connected to the plurality of heat source machines and circulate the heat medium generated from the plurality of heat source machines.
A plurality of branch paths having an inner diameter smaller than the inner diameter of the heat medium flow path and branching from between the pump located downstream of the heat source machine and the heat source machine among each of the plurality of heat medium flow paths. ,
A confluence channel connected to the downstream side of each of the plurality of heat medium flow paths, having an inner diameter smaller than the inner diameter of the heat medium flow path, and merging the plurality of branch paths.
A valve provided in each of the plurality of branch paths to open and close the branch path,
A control unit that controls the opening and closing of the valve,
Equipped with
The control unit
Among the plurality of heat source machines, the valve provided in the branch path branching from the heat medium flow path connected to the heat source machine controlled in the operation start state is controlled to be closed.
If the time required to start the operation of the heat source machine controlled to be stopped is less than a predetermined time among the plurality of heat source machines, the heat medium flow path is branched from the heat medium flow path connected to the heat source machine in the stopped state. The valve provided in the branch path is controlled to be in an open state, and the valve is controlled to be in an open state.
When the time required to start the operation of the heat source machine controlled to be stopped is longer than a predetermined time among the plurality of heat source machines, the heat medium flow path is branched from the heat medium flow path connected to the heat source machine in the stopped state. Controlling the valve provided in the branch path to a closed state,
Cooling system.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007163075A (en) 2005-12-15 2007-06-28 Kitz Corp Flow control system
JP2010210124A (en) 2009-03-09 2010-09-24 Sanken Setsubi Kogyo Co Ltd Heat source system
JP2013224794A (en) 2012-04-23 2013-10-31 Panasonic Corp Method and device for air conditioning control of clean room
JP5474050B2 (en) 2009-04-01 2014-04-16 三菱電機株式会社 Air conditioner
US20160033158A1 (en) 2013-04-01 2016-02-04 Carrier Corporation Air conditioning system and method for controlling air conditioning system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007163075A (en) 2005-12-15 2007-06-28 Kitz Corp Flow control system
JP2010210124A (en) 2009-03-09 2010-09-24 Sanken Setsubi Kogyo Co Ltd Heat source system
JP5474050B2 (en) 2009-04-01 2014-04-16 三菱電機株式会社 Air conditioner
JP2013224794A (en) 2012-04-23 2013-10-31 Panasonic Corp Method and device for air conditioning control of clean room
US20160033158A1 (en) 2013-04-01 2016-02-04 Carrier Corporation Air conditioning system and method for controlling air conditioning system

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