JP4155684B2

JP4155684B2 - Heat medium supply system

Info

Publication number: JP4155684B2
Application number: JP30639499A
Authority: JP
Inventors: 淳日下; 靖中川; 和幸森本
Original assignee: Osaka Gas Co Ltd
Current assignee: Osaka Gas Co Ltd
Priority date: 1999-10-28
Filing date: 1999-10-28
Publication date: 2008-09-24
Anticipated expiration: 2019-10-28
Also published as: JP2001124350A

Description

【０００１】
【発明の属する技術分野】
本発明は、熱負荷に接続された熱媒循環路を通して熱媒を循環させる循環手段、前記熱媒を加熱する加熱手段、および、前記熱媒循環路に熱媒を自動的に補給する補給手段を備えた熱源機が設けられ、前記熱媒循環路の途中箇所に、戻り側循環路部分の戻り熱媒を往き側循環路部分にバイパス流動させるバイパス路が設けられ、そのバイパス路からの戻り熱媒と前記熱源機からの往き熱媒との混合比を調整する混合手段と、その混合手段にて混合された混合熱媒を前記熱媒循環路および前記バイパス路を通して前記熱負荷に循環させる熱負荷側循環手段と、熱媒循環運転を管理する制御手段とが設けられ、その制御手段が、熱媒循環運転が指令されると、前記循環手段および前記熱負荷側循環手段を循環作動させ、前記熱源機からの往き熱媒の温度が熱源供給用目標温度になるように前記加熱手段を加熱作動させ、並びに、前記混合熱媒の温度が熱負荷用目標温度になるように前記混合手段を混合作動させる熱媒循環処理を実行するように構成された熱媒供給システムに関する。
【０００２】
【従来の技術】
上記のような熱媒供給システムは、例えば、特開平９−３１８０８２号公報に開示されているように、床暖房パネルなどの熱負荷に適した温度の熱媒を熱負荷に供給するもので、熱負荷にて要求されている温度に対応した熱負荷用目標温度になるように混合手段を混合作動させ、熱負荷にて要求されている温度に対応した熱負荷用目標温度の熱媒を熱負荷に供給するものである。
具体的には、熱源機からの８０℃の高温水とバイパス路からの３０℃の温水を混合させて、６０℃の温水を床暖房パネルなどの熱負荷に供給するように混合手段を混合作動させるようにしている。
【０００３】
ところで、上記熱媒供給システムにおいては、システムの設置後などにおいて熱負荷および熱媒循環路に熱媒を充填させる必要があり、そのために、制御手段が、前記の如く、混合手段を混合作動させながら、循環手段および熱負荷側循環手段を循環作動させて、熱源機から供給される熱媒を熱負荷および熱媒循環路に充填するようにしていた。
【０００４】
【発明が解決しようとする課題】
しかしながら、上記従来の熱媒供給システムでは、熱負荷および熱媒循環路に熱媒を充填するときにおいても、混合手段を混合作動させるために、熱源機から供給される熱媒の全量を混合手段よりも熱負荷側の往き側循環路部分に的確に流動させることができず、熱負荷および熱媒循環路の一部にしか熱媒を充填することができなかったり、熱負荷および熱媒循環路の全体に熱媒を充填することができたとしてもその熱媒の充填に時間がかかるという問題があった。
【０００５】
すなわち、熱源機から供給される熱媒の全量を混合手段よりも熱負荷側の往き側循環路部分に的確に流動させることにより、熱負荷および熱媒循環路に確実にかつ短時間で熱媒を充填することができるものとなるが、上記従来の熱媒供給システムでは、熱負荷および熱媒循環路に熱媒を充填するときにおいても、混合手段を混合作動させるので、熱源機から供給される熱媒が混合手段によりその流れを絞られた状態で混合手段よりも熱負荷側の往き側循環路部分に流動することとなり、熱源機から供給される熱媒の全量を混合手段よりも熱負荷側の往き側循環路部分に的確に流動させることができないことがあった。
【０００６】
熱源機から供給される熱媒が混合手段により不必要に絞られて流れることについて、説明を加えると、例えば、加熱手段を加熱作動させるなどにより、熱源機から熱負荷用目標温度よりも高温の熱媒を供給したときには、熱源機からの高温の熱媒とバイパス路からの低温の熱媒とを混合させて、混合熱媒の温度を熱負荷用目標温度に調整しようとする結果、熱源機から供給される熱媒が混合手段により絞られた状態で流動することとなり、また、混合手段は、熱媒の圧力の変化によって、熱源機からの往き熱媒とバイパス路からの戻り熱媒との実際の混合比が変化するものであるため、往き熱媒と戻り熱媒の圧力によっては、熱源機から供給される熱媒が混合手段により絞られた状態で流動することとなるなど、熱源機から供給される熱媒の全量を混合手段よりも熱負荷側の往き側循環路部分に的確に流動させることができない虞があった。
【０００７】
本発明は、かかる点に着目してなされたものであり、その目的は、熱負荷および熱媒循環路に確実にかつ短時間で熱媒を充填することが可能となる熱媒供給システムを提供する点にある。
【０００８】
【課題を解決するための手段】
この目的を達成するために、請求項１に記載の発明によれば、熱負荷に接続された熱媒循環路を通して熱媒を循環させる循環手段、前記熱媒を加熱する加熱手段、および、前記熱媒循環路に熱媒を自動的に補給する補給手段を備えた熱源機が設けられ、前記熱媒循環路の途中箇所に、戻り側循環路部分の戻り熱媒を往き側循環路部分にバイパス流動させるバイパス路が設けられ、そのバイパス路からの戻り熱媒と前記熱源機からの往き熱媒との混合比を調整する混合手段と、その混合手段にて混合された混合熱媒を前記熱媒循環路および前記バイパス路を通して前記熱負荷に循環させる熱負荷側循環手段と、熱媒循環運転を管理する制御手段とが設けられ、その制御手段が、熱媒循環運転が指令されると、前記循環手段および前記熱負荷側循環手段を循環作動させ、前記熱源機からの往き熱媒の温度が熱源供給用目標温度になるように前記加熱手段を加熱作動させ、並びに、前記混合熱媒の温度が熱負荷用目標温度になるように前記混合手段を混合作動させる熱媒循環処理を実行するように構成された熱媒供給システムにおいて、
前記制御手段が、前記熱負荷および前記熱媒循環路に熱媒を充填する熱媒充填運転が指令されると、前記循環手段および前記熱負荷側循環手段を循環作動させ、並びに、前記バイパス路を通した熱媒の流動が無いあるいはそれに近いバイパス路閉じ状態に前記混合手段を作動させる熱媒充填処理を実行するように構成され、前記熱媒循環路のうちの前記バイパス路が設けられる一部の循環路部分、前記混合手段、および、前記熱負荷側循環手段とが、一体的に混合ユニットとして備えられ、前記混合ユニットに、前記熱媒充填運転を指令する熱媒充填運転指令手段が設けられている。
【０００９】
すなわち、熱媒充填処理を指令することにより、制御手段にて、循環手段および熱負荷側循環手段を作動させることに加えて、前記バイパス路を通した熱媒の流動が無いあるいはそれに近いバイパス路閉じ状態に混合手段を作動させる、熱媒充填処理を実行させるようにしてあるから、つまり、この熱媒充填処理においては、混合手段をバイパス路閉じ状態にするようにして、熱源機から供給される熱媒の温度にかかわらず、混合手段にて熱媒の流れに不必要な絞りを与えるのを回避し、また、熱媒の圧力にて実際の混合比が変化したとしても、混合手段にて熱媒の流れに不必要な絞りを与えるのを極力回避するようにしてあるから、システムの設置後などにおいて熱負荷および熱媒循環路に熱媒を充填させるときに、熱媒充填運転を指令して熱媒充填処理を行わせることにより、熱源機からの熱媒に混合手段にて不必要な絞りを与えること無く、その熱媒の全量を的確に混合手段よりも熱負荷側の往き側循環路部分に流動させながら、熱負荷および熱媒循環路に熱媒の充填を行うことができるものとなるのである。
したがって、熱源機からの熱媒の全量を的確に混合手段よりも熱負荷側の往き側循環路部分に流動させながら、熱負荷および熱媒循環路に熱媒の充填を行うことができるものとなるから、システムの設置後などにおいて熱負荷および熱媒循環路に熱媒を充填することを、確実にかつ短時間で行えるようになった。
【００１０】
又、請求項１に記載の発明によれば、前記熱媒循環路のうちの前記バイパス路が設けられる一部の循環路部分、前記混合手段、および、前記熱負荷側循環手段とが、一体的に混合ユニットとして備えられている。
すなわち、熱媒循環路のうちのバイパス路が設けられる一部の循環路部分、混合手段、および、熱負荷側循環手段とが一体的に備えられているので、混合ユニットを設置するだけで混合手段や熱負荷側循環手段などを設置することができ、
混合手段や熱負荷側循環手段などの設置作業が容易なものとなる。
【００１１】
さらに、請求項１に記載の発明によれば、前記混合ユニットに、前記熱媒充填運転を指令する熱媒充填運転指令手段が設けられている。
【００１２】
すなわち、熱媒充填運転を指令する熱媒充填運転指令手段を制御手段に制御指令を指令するリモコンや熱源機に設けることも考えられるが、例えば、リモコンには、運転を指令するための運転スイッチやその他のスイッチなどが設けられ、このリモコンに熱媒充填運転指令手段を設ける場合には、既に設けられている運転スイッチやその他のスイッチなどと連係をとる必要があるなど、その分構造が複雑化する虞がある。
また、熱源機に熱媒充填運転指令手段を設ける場合においても、同様に、既に設けられている機器との連係をとる必要があるなど、その分構造が複雑化する虞がある。
【００１３】
しかしながら、熱媒供給システムのために新しく設置される混合ユニットに熱媒充填運転指令手段を設けるので、その混合ユニットに熱媒充填運転指令手段を単純に設けるだけでよく、前記の如く、リモコンや熱源機に熱媒充填運転指令手段を設けるものと比べて、構成が容易なものとなる。
【００１４】
請求項２に記載の発明によれば、前記熱媒循環路における前記熱負荷側循環手段の設置箇所に熱媒が存在していることを検出する熱媒検出手段が設けられ、前記制御手段が、前記熱媒充填処理において、先ず、前記循環手段を循環作動させること並びに前記混合手段を前記バイパス路閉じ状態に作動させることを実行し、前記熱媒検出手段が熱媒を検出すると、前記熱負荷側循環手段を循環作動させることを実行するように構成されている。
【００１５】
すなわち、熱負荷側循環手段の設置箇所に熱媒が存在しない状態でポンプなどの熱負荷側循環手段を循環作動させると、熱負荷側循環手段に損傷を与えることとなり、熱負荷側循環手段の寿命を短くしてしまうという問題があるが、熱媒検出手段の検出情報に基づいて、熱負荷側循環手段の設置箇所に熱媒が存在していることが検出されると、熱負荷側循環手段を循環作動させるので、常に、熱負荷側循環手段の設置箇所に熱媒が存在している状態で熱負荷側循環手段を循環作動させることが可能となり、熱負荷側循環手段の寿命を長くすることが可能となる。
【００１６】
【発明の実施の形態】
本発明にかかる熱媒供給システムを図面に基づいて説明する。
この熱媒供給システムは、図１および２に示すように、熱負荷としての床暖房パネル１と、この床暖房パネル１に接続された熱媒循環路２を通して熱媒を循環させる循環手段などを備えた熱源機４と、熱媒循環路２の途中箇所に設けられたバイパス路３からの戻り熱媒と熱源機４からの往き熱媒との混合比を調整する混合手段９などを備えた混合ユニット５と、熱媒循環運転を管理する制御手段６に動作指令を指令するリモコン操作部７などから構成されている。
【００１７】
前記混合ユニット５は、その運転がユニット側制御手段８により管理され、熱媒循環路２における戻り側循環路部分２ｂの戻り熱媒を往き側循環路部分２ａにバイパス流動させるバイパス路３が設けられる一部の循環路部分２ｃと、バイパス路３からの戻り熱媒と熱源機４からの往き熱媒との混合比を調整する混合手段としてのミキシングバルブ９と、このミキシングバルブ９にて混合された混合熱媒を熱媒循環路２およびバイパス路３を通して床暖房パネル１に循環させる熱負荷側循環手段としての熱負荷側循環ポンプ１０などが備えられている。
また、前記混合ユニット５には、ミキシングバルブ９にて混合された混合熱媒の温度を検出する熱媒検出手段としてのサーミスタ１１が設けられ、熱媒循環路２における往き側循環路部分２ａに、熱源機４側から順にミキシングバルブ９、サーミスタ１１、熱負荷側循環ポンプ１０が設けられ、熱負荷側循環ポンプ１０よりも床暖房パネル１側の往き熱媒の一部をバイパス路３と戻り側循環路部分２ｂとの接続箇所よりも熱源機４側の戻り側循環路部分２ｂにバイパス流動させるユニットバイパス路１２が設けられている。
【００１８】
前記ミキシングバルブ９について説明を加えると、このミキシングバルブ９は、詳細は図示しないが、ステッピングモータ１３を作動させることにより弁本体を作動させて、バイパス路３からの戻り熱媒の流入口と熱源機４からの往き熱媒の流入口との開度を調整して、バイパス路３からの戻り熱媒と熱源機４からの往き熱媒との混合比を調整するように構成され、図３に示すように、ステッピングモータ１３のステップ数を変更することによって、バイパス路３からの戻り熱媒と熱源機４からの往き熱媒との混合比を変更するようにしている。
なお、図３において、低温水側はバイパス路３からの戻り熱媒であり、高温水側は熱源機４からの往き熱媒のことを示している。
【００１９】
前記熱源機４は、図４に示すように、その運転が熱源機側制御手段１４により管理され、補給手段としての補給水タンク１５、加熱手段１６としての熱交換器１７およびこの熱交換器１７を加熱するバーナ１８、循環手段としての循環ポンプ１９などが備えられている。
そして、熱媒循環路２における戻り側循環路部分２ｂに接続される熱媒戻り路２０が補給水タンク１５の入口側に接続され、熱媒循環路２における往き側循環路部分２ａに接続される熱媒往き路２１が熱交換器１７の出口側に接続され、補給水タンク１５の出口側と熱交換器１７の入口側を連通する熱媒連通路２２が設けられ、この熱媒連通路２２の途中箇所に循環ポンプ１９が設けられている。
【００２０】
前記熱媒往き路２１を流動する熱媒を熱媒戻り路２０にバイパス流動させる熱源機バイパス路２３が設けられ、熱媒戻り路２０には、熱媒戻り路２０を流動する熱媒の温度を検出する熱媒戻りサーミスタ２４が設けられ、熱媒往き路２１には、熱媒往き路２１を流動する熱媒の温度を検出する熱媒往きサーミスタ２５が設けられている。
前記補給水タンク１５に給水するためのタンク給水路２６には、補給水バルブ２７と補給水電磁弁２８が設けられ、補給水タンク１５には、水位の上限を検出する上限センサ２９と水位の下限を検出する下限センサ３０が設けられ、熱源機側制御手段１４により補給水タンク１５の水位が上限センサと下限センサとの間の水位に維持されるように、補給水バルブ２７と補給水電磁弁２８が制御されるように構成されている。なお、オーバーフロー路３１も補給水タンク１５に接続されている。
【００２１】
前記バーナ１８に燃料ガスを供給する燃料供給路３２には、燃料供給を断続する電磁操作式の断続弁３３、燃料供給量（バーナ１８の燃焼量）を変更調節自在な電磁操作式のガス量調節弁３４が備えられ、バーナ１８に燃焼用空気を供給するファン３５も設けられ、バーナ１８の近くには、バーナ１８に対する点火動作を実行するイグナイタ３６と、バーナ１８が着火されているか否かを検出するフレームロッド３７とがそれぞれ備えられている。
【００２２】
前記リモコン操作部７には、熱媒循環運転を指令する運転スイッチ３８、床暖房パネル１の室内温度を設定する温度設定スイッチ３９、温度設定スイッチ３９にて設定された室内温度などを表示する表示部４０などが備えられている。
また、ユニット側制御手段８の基板上には、熱媒充填運転を指令する熱媒充填運転指令手段としての水張りスイッチ４１が設けられている。
【００２３】
そして、ユニット側制御手段８および熱源機側制御手段１４とから構成されている制御手段６は、リモコン操作部７の運転スイッチ３８の押し操作により、熱媒循環運転が指令されると、循環ポンプ１９および熱負荷側循環ポンプ１０を循環作動させ、熱源機４からの往き熱媒の温度が熱源供給用温度になるように加熱手段１６を加熱作動させ、並びに、混合熱媒の温度が熱負荷用目標温度になるようにミキシングバルブ９を混合作動させる熱媒循環処理を実行するように構成されている。
また、前記制御手段６は、水張りスイッチ４１のＯＮ操作により、熱媒充填運転が指令されると、循環ポンプ１９および熱負荷側循環ポンプ１０を循環作動させ、熱源機４からの往き熱媒の温度が熱源供給用温度になるように加熱手段１６を加熱作動させ、並びに、バイパス路３を通した熱媒の流動が無いあるいはそれに近いバイパス路閉じ状態（全開状態）にミキシングバルブ９を作動させる熱媒充填処理を実行するように構成されている。
【００２４】
前記熱媒循環処理について説明を加えると、前記制御手段６は、熱媒循環運転が指令されるに伴って、バイパス路３を通した熱媒の流動が無いあるいはそれに近いバイパス路閉じ状態（全開状態）にミキシングバルブ９を徐々に作動させながら、循環ポンプ１９を循環作動させ、熱源機４からの往き熱媒の温度が熱源供給用温度（例えば、８０℃）になるように加熱手段１６を加熱作動させることを実行し、サーミスタ１１の検出温度が作動用設定温度（例えば、５４℃）以上になり、熱負荷側循環ポンプ１０の設置箇所に熱媒を検出すると、熱負荷側循環ポンプ１０を作動させることを実行する。
そして、熱媒循環運転が指令されてから設定時間が経過して、リモコン操作部７による設定室内温度が低温状態であるときに、混合熱媒の温度が熱負荷用目標温度（例えば、５６℃〜６４℃）になるようにミキシングバルブ９を混合作動させることを実行する。
【００２５】
すなわち、熱媒循環運転においては、図１に示すように、熱源機４からの往き熱媒がミキシングバルブ９によりバイパス路３からの戻り熱媒と混合されて、熱負荷側循環ポンプ１０の循環作動により、熱媒循環路２およびバイパス路３を通して床暖房パネル１に熱媒を循環供給することになる。
なお、混合ユニット５内における往き側循環路部分２ａを流動する熱媒の一部がユニットバイパス路１２を通して熱源機４に流動可能とし、混合ユニット５内における戻り側循環路部分２ｂの一部が熱源機４に戻り側循環路部分２ｂを通して熱源機４に流動可能としている。
【００２６】
そして、リモコン操作部７の運転スイッチ３８が再度押し操作されると、循環ポンプ１９の循環作動および加熱手段１６の加熱作動を停止させて熱源機４の運転を停止させ、熱源機４からの往き熱媒の流動が無いあるいはそれに近い熱媒循環路閉じ状態（全閉状態）にミキシングバルブ９を作動させることを実行し、サーミスタ１１の検出温度が停止用設定温度（例えば、６０℃）以下になると、熱負荷側循環ポンプ１０の循環作動を停止させる熱媒循環処理の停止処理を実行するように構成されている。
【００２７】
前記熱媒充填処理について説明を加えると、この熱媒充填処理は、熱源機４の補給水タンク１５の水位が上限センサ２９と下限センサ３０の間にあるときに実行されるようにしており、前記制御手段６は、熱媒充填運転が指令されると、先ず、循環ポンプ１９を循環作動させ、熱源機４からの往き熱媒の温度が熱源供給用温度（例えば、８０℃）になるように加熱手段１６を加熱作動させ、並びに、バイパス路３を通した熱媒の流動が無いあるいはそれに近いバイパス路閉じ状態（全開状態）にミキシングバルブ９を作動させることを実行し、サーミスタ１１の検出温度が作動用設定温度（例えば、５４℃）以上になり、熱負荷側循環ポンプ１０の設置箇所に熱媒を検出すると、熱負荷側循環ポンプ１０を作動させることを実行する。
【００２８】
なお、この実施形態では、熱媒充填運転において、熱源機４からの往き熱媒の温度を熱源供給用目標温度になるように加熱手段１６を加熱作動させるようにしているが、加熱手段１６を加熱作動させずに、熱源機４から補給水タンク１５の水を床暖房パネル１および熱媒循環路２に充填するようにしてもよい。
【００２９】
すなわち、熱媒充填運転においては、図２に示すように、バイパス路３を通した熱媒の流動が無いあるいはそれに近いバイパス路閉じ状態（全開状態）にミキシングバルブ９を作動させ、熱源機４から供給される熱媒の全量をミキシングバルブ９よりも床暖房パネル１側の往き側循環路部分２ａに的確に流動させて、熱源機４からの往き熱媒により床暖房パネル１および熱媒循環路２の熱媒の充填が行われることになる。
【００３０】
このようにして、床暖房パネル１および熱媒循環路２に熱媒を充填する熱媒充填運転において、バイパス路３を通した熱媒の流動が無いあるいはそれに近いバイパス路閉じ状態（全開状態）にミキシングバルブ９を作動させ、熱源機４から供給される熱媒の全量をミキシングバルブ９よりも床暖房パネル１側の往き側循環路部分２ａに的確に流動させるので、熱負荷および熱媒循環路に確実にかつ短時間で熱媒を充填することが可能となる熱媒供給システムを提供することが可能となった。
【００３１】
また、前記熱媒循環運転および熱媒充填運転において、サーミスタ１１の検出温度が作動用設定温度（例えば、５４℃）以上になり、熱負荷側循環ポンプ１０の設置箇所に熱媒を検出すると、熱負荷側循環ポンプ１０を作動させることによって、常に、熱媒が存在する状態で熱負荷側循環ポンプ１０を循環作動させることが可能となり、熱媒が存在しない状態で熱負荷側循環ポンプ１０を循環作動させて、熱負荷側循環ポンプ１０が損傷を受けることを防止して、熱負荷側循環ポンプ１０の寿命を長く維持することが可能となる。
ちなみに、補給水タンク１５により熱媒連通路２２における循環ポンプ１９の設置箇所に熱媒が補給されるので、熱媒連通路２２における循環ポンプ１９の設置箇所に熱媒が存在する状態で循環ポンプ１９を循環作動させ、循環ポンプ１９の空作動を防止して、循環ポンプ１９の寿命も長く維持することが可能となる。
【００３２】
そして、熱媒充填運転が指令されてから停止用設定時間が経過するか、または、水張りスイッチ４１がＯＦＦ操作されると、循環ポンプ１９の循環作動および加熱手段１６の加熱作動を停止させて熱源機４の運転を停止させ、熱源機４からの往き熱媒の流動が無いあるいはそれに近い熱媒循環路閉じ状態（全閉状態）にミキシングバルブ９を作動させることを実行し、サーミスタ１１の検出温度が停止用設定温度以下になると、熱負荷側循環ポンプ１０の循環作動を停止させる熱媒充填処理の停止処理を実行するように構成されている。
【００３３】
前記ユニット側制御手段８は、リモコン操作部７と双方向通信自在に接続され、リモコン操作部７からの熱媒循環運転の指令が指令されると、混合ユニット５の運転を管理するとともに、その熱媒循環運転の指令を中継して熱源機側制御手段１４に指令し、かつ、ユニット側制御手段８の基板上に設けられた水張りスイッチ４１により熱媒充填運転が指令されると、混合ユニット５の運転を管理するとともに、熱媒充填運転を熱源機側制御手段１４に指令するように構成されている。
そして、ユニット側制御手段８は、熱媒循環運転および熱媒充填運転の指令に基づいて、サーミスタ１１の検出温度が設定温度以上となり、熱負荷側循環ポンプ１０の設置箇所に熱媒を検出すると、熱負荷側循環ポンプ１０を循環作動させるとともに、バイパス路３からの戻り熱媒と熱源機４からの往き熱媒との混合比を調整するようにミキシングバルブ９の混合作動を制御するように構成されている。
【００３４】
前記ミキシングバルブ９の混合作動について説明を加えると、熱媒循環運転が指令されるに伴って、バイパス路３を通した熱媒の流動が無いあるいはそれに近いバイパス路閉じ状態（全開状態）になるようにステッピングモータ１３のステップ数を徐々に変更させるようにしている。
すなわち、バイパス路３を通した熱媒の流動が無いあるいはそれに近いバイパス路閉じ状態（全開状態）になるようにステッピングモータ１３のステップ数を徐々に変更させることによって、バルブの急激な開閉、気体の混入などにより発生する異常圧力、すなわちウォーターハンマーを防止するようにしている。
【００３５】
そして、熱媒循環運転が指令されてから設定時間が経過して、リモコン操作部７による設定室内温度が低温状態であるときに、混合熱媒の温度が熱負荷用目標温度（例えば、５４℃〜６４℃）になるように、サーミスタ１１の検出温度に基づいてステッピングモータ１３のステップ数を調整するようにしている。
また、熱媒充填指令が指令されると、バイパス路３を通した熱媒の流動が無いあるいはそれに近いバイパス路閉じ状態（全開状態）になるようにステッピングモータ１３のステップ数を変更させるようにしている。
【００３６】
前記熱源機側制御手段１４は、ユニット側制御手段８により中継されるリモコン操作部７からの指令などに基づいて、循環ポンプ１９を循環作動させるとともに、熱源機４からの往き熱媒の温度が熱源供給用目標温度になるように加熱手段１６を加熱作動させるように構成されている。
ちなみに、熱源機側制御手段４は、
【００３７】
前記加熱手段１６の加熱作動について説明を加えると、ファン３５による通風作動を開始し、かつ、断続弁３３を開弁させてガス量調節弁３４を点火用ガス量になるように開弁調整するとともに、イグナイタ３６によってバーナ１８へ着火し、フレームロッド３７によって確認する。
その後、循環ポンプ１９の循環作動による循環量、熱媒戻りサーミスタ２４の検出情報、および、熱媒往きサーミスタ２５の検出情報に基づいて、熱源機４からの往き熱媒の温度が熱源供給用目標温度（例えば、８０℃）になるようにバーナ１８の燃焼量を調整するようにしている。
【００３８】
前記制御手段６の熱媒循環運転および熱媒充填運転のそれぞれを、図５および６のフローチャートに基づいて説明する。
まず、熱媒循環運転について説明すると、リモコン操作部７の運転スイッチ３８が押し操作されて、熱媒循環運転が指令されると、図５に示すように、循環ポンプ１９を循環作動させ、加熱手段１６を加熱作動させて熱源機４の運転を開始し、バイパス路を通した熱媒の流動が無いあるいはそれに近いバイパス路閉じ状態（全開状態）にミキシングバルブ９を徐々に作動させる（ステップ１）。
そして、サーミスタ１１の検出温度、すなわちサーミスタ温度が作動用設定温度（例えば、５４℃）以上になると、熱負荷側循環ポンプ１０を循環作動させて、熱媒循環運転が指令されてから設定時間（例えば、３０分）経過して、リモコン操作部７による設定室内温度が低温状態である低温運転のときには、混合熱媒の温度が熱負荷用目標温度（例えば、５４℃〜６４℃）になるようにミキシングバルブ９をミキシング混合作動させる（ステップ２〜６）。
【００３９】
このようにして、熱源機４からの往き熱媒とバイパス路３からの戻り熱媒とがミキシングバルブ９にて混合された混合熱媒が床暖房パネル１に供給されて、室内を暖房するようにしているが、リモコン操作部７の運転スイッチ３８が再度押し操作されて、熱媒循環運転の停止が指令されると、循環ポンプ１９の循環作動および加熱手段１６の加熱作動を停止させて熱源機４の運転を停止させ、熱源機４からの往き熱媒の流動が無いあるいはそれに近い熱媒循環路閉じ状態（全閉状態）にミキシングバルブ９を作動させる（ステップ７，８）。
そして、サーミスタ１の検出温度、すなわちサーミスタ温度が停止用設定温度（例えば、６０℃）以下になると、熱負荷側循環ポンプ１０の循環作動を停止させる（ステップ９，１０）。
【００４０】
次に、熱媒充填処理について説明すると、水張りスイッチ４１がＯＮ操作されて、熱媒充填運転が指令されると、循環ポンプ１９を循環作動させ、加熱手段１６を加熱作動させて熱源機４の運転を開始し、バイパス路を通した熱媒の流動が無いあるいはそれに近いバイパス路閉じ状態（全開状態）にミキシングバルブ９を作動させる（ステップ１１）。
そして、サーミスタ１１の検出温度、すなわちサーミスタ温度が作動用設定温度（例えば、５４℃）以上になると、熱負荷側循環ポンプ１０を作動させる（ステップ１２，１３）。
【００４１】
このようにして、バイパス路を通した熱媒の流動が無いあるいはそれに近いバイパス路閉じ状態（全開状態）で床暖房パネル１および熱媒循環路２に熱媒が充填され、熱媒充填運転が指令されてから停止用設定時間（例えば、２０分）が経過するか、または、水張りスイッチ４１がＯＦＦ操作されて、熱媒充填運転の停止が指令されると、循環ポンプ１９の循環作動および加熱手段１６の加熱作動を停止させて熱源機４の運転を停止させ、熱源機４からの往き熱媒の流動が無いあるいはそれに近い熱媒循環路閉じ状態（全閉状態）にミキシングバルブ９を作動させる（ステップ１４、１５）。
そして、サーミスタ１１の検出温度、すなわちサーミスタ温度が停止用設定温度（例えば、６０℃）以下になると、熱負荷側循環ポンプ１０の循環作動を停止させる（ステップ１６，１７）。
【００４４】
〔別実施形態〕
（１）上記実施形態では、熱媒循環運転および熱媒充填運転において、サーミスタ１１の検出温度が作動用設定温度以上になり、熱負荷側循環ポンプ１０の設置箇所に熱媒を検出すると、熱負荷側循環ポンプ１０を循環作動させるようにしているが、熱媒循環運転および熱媒充填運転が指令されると、熱負荷側循環ポンプ１０を循環作動させてもよく、熱負荷側循環ポンプ１０の循環作動条件は変更可能である。
【００４５】
（２）上記実施形態では、混合ユニット５の運転を管理するユニット側制御手段８と、熱源機４の運転を管理する熱源機側制御手段１４とが各別に設けられているが、例えば、熱源機４および混合ユニット５の運転を管理する制御手段６を設けるようにして実施することも可能である。
【図面の簡単な説明】
【図１】熱媒供給システムの全体概略構成図
【図２】熱媒供給システムの全体概略構成図
【図３】ミキシングバルブにおけるステッピングモータのステップ数と混合比を示す図
【図４】熱源機の全体概略構成図
【図５】熱媒循環運転における制御手段の動作を示すフローチャート
【図６】熱媒充填運転における制御手段の動作を示すフローチャート
【符号の説明】
１熱負荷
２熱媒循環路
３バイパス路
４熱源機
５混合ユニット
６制御手段
９混合手段
１０熱負荷側循環手段
１１熱媒検出手段
１５補給手段
１６加熱手段
１９循環手段
４１熱媒充填運転指令手段[0001]
BACKGROUND OF THE INVENTION
The present invention provides a circulation means for circulating a heat medium through a heat medium circulation path connected to a heat load, a heating means for heating the heat medium, and a supply means for automatically replenishing the heat medium circulation path A heat source device is provided, and a bypass path is provided in the middle of the heating medium circulation path for bypassing the return heat medium in the return side circulation path section to the outward circulation path section, and the return from the bypass path Mixing means for adjusting the mixing ratio of the heat medium and the forward heat medium from the heat source device, and the mixed heat medium mixed by the mixing means are circulated to the heat load through the heat medium circulation path and the bypass path. A heat load side circulation means and a control means for managing the heat medium circulation operation are provided, and when the heat medium circulation operation is commanded, the control means circulates the circulation means and the heat load side circulation means. , Outgoing heat medium from the heat source machine The heating means is heated so that the temperature becomes the target temperature for supplying the heat source, and the heating medium circulation process is performed so that the mixing means is mixed so that the temperature of the mixed heat medium becomes the target temperature for the heat load. The present invention relates to a heat medium supply system configured to do this.
[0002]
[Prior art]
The heat medium supply system as described above, for example, supplies a heat medium having a temperature suitable for a heat load such as a floor heating panel to the heat load as disclosed in JP-A-9-318082. The mixing means is mixed and operated so that the target temperature for the heat load corresponding to the temperature required for the heat load is reached, and the heat medium having the target temperature for the heat load corresponding to the temperature required for the heat load is heated. It supplies to the load.
Specifically, the mixing means is mixed and operated so that hot water of 80 ° C. from the heat source unit and hot water of 30 ° C. from the bypass channel are mixed and the hot water of 60 ° C. is supplied to a heat load such as a floor heating panel. I try to let them.
[0003]
By the way, in the heat medium supply system, it is necessary to fill the heat load and the heat medium circuit with the heat medium after the system is installed. For this purpose, the control means performs the mixing operation of the mixing means as described above. However, the circulation means and the heat load side circulation means are circulated and the heat medium supplied from the heat source device is filled in the heat load and the heat medium circulation path.
[0004]
[Problems to be solved by the invention]
However, in the above conventional heat medium supply system, even when the heat medium is filled in the heat load and the heat medium circulation path, the mixing means is used to mix the entire amount of the heat medium supplied from the heat source unit in order to perform the mixing operation of the mixing means. It is not possible to accurately flow to the forward circulation path portion on the heat load side, and only a part of the heat load and heat medium circulation path can be filled with the heat medium, or the heat load and heat medium circulation Even if the entire path can be filled with the heating medium, there is a problem that it takes time to fill the heating medium.
[0005]
That is, by accurately flowing the entire amount of the heat medium supplied from the heat source device to the forward circulation path portion on the heat load side of the mixing means, the heat medium is reliably and quickly transferred to the heat load and the heat medium circulation path. However, in the above conventional heat medium supply system, the mixing means is mixed and operated even when the heat medium is filled in the heat load and the heat medium circulation path. When the flow of the heat medium is reduced by the mixing means, the heat medium flows into the forward circulation path portion on the heat load side of the mixing means, and the entire amount of the heat medium supplied from the heat source machine is heated more than the mixing means. In some cases, it was not possible to flow accurately to the load-side return circuit section.
[0006]
If the heating medium supplied from the heat source unit is unnecessarily restricted and flows by the mixing unit, for example, the heating unit may be heated to a temperature higher than the target temperature for the heat load by operating the heating unit. When the heat medium is supplied, the high temperature heat medium from the heat source apparatus and the low temperature heat medium from the bypass path are mixed to adjust the temperature of the mixed heat medium to the target temperature for the heat load. The mixing medium flows in a state of being squeezed by the mixing unit, and the mixing unit includes a return heating medium from the heat source unit and a return heating medium from the bypass path due to a change in the pressure of the heating medium. The actual mixing ratio of the heat source changes, so depending on the pressure of the forward and return heat medium, the heat medium supplied from the heat source machine flows in a state of being squeezed by the mixing means, etc. Of the heat medium supplied from the machine Than mixing means the amount there is a possibility that it is impossible to accurately pour the forward side circulation path of the heat load side.
[0007]
The present invention has been made paying attention to such a point, and an object of the present invention is to provide a heat medium supply system capable of reliably filling the heat load and the heat medium circuit with the heat medium in a short time. There is in point to do.
[0008]
[Means for Solving the Problems]
  In order to achieve this object, according to the invention described in claim 1, a circulation means for circulating a heat medium through a heat medium circulation path connected to a heat load, a heating means for heating the heat medium, and the A heat source device having a replenishment means for automatically replenishing the heat medium circulation path is provided, and the return heat medium of the return side circulation path portion is provided in the middle of the heat medium circulation path to the forward side circulation path portion. A bypass path for bypass flow is provided, mixing means for adjusting the mixing ratio of the return heat medium from the bypass path and the forward heat medium from the heat source unit, and the mixed heat medium mixed by the mixing means A heat load side circulation means that circulates to the heat load through the heat medium circulation path and the bypass path, and a control means that manages the heat medium circulation operation are provided, and when the control means commands the heat medium circulation operation, The circulation means and the heat load side circulation The heating means is heated so that the temperature of the forward heat medium from the heat source unit becomes the heat source supply target temperature, and the temperature of the mixed heat medium becomes the heat load target temperature. In the heat medium supply system configured to execute a heat medium circulation process for mixing and operating the mixing means,
  When the control means is instructed to perform a heat medium filling operation for filling the heat load and the heat medium circulation path with the heat medium, the control means circulates the circulation means and the heat load side circulation means, and the bypass path The heat medium filling process is performed to operate the mixing means in a closed state of the bypass passage where there is no flow of the heat medium through or close to it.A part of the circulation path provided with the bypass path in the heat medium circulation path, the mixing means, and the heat load side circulation means are integrally provided as a mixing unit, and the mixing unit includes A heating medium charging operation command means for commanding the heating medium charging operation is provided.ing.
[0009]
That is, by instructing the heat medium filling process, in addition to operating the circulation means and the heat load side circulation means in the control means, there is no flow of the heat medium through the bypass path or a bypass path close thereto. Since the heating medium filling process for operating the mixing means in the closed state is executed, that is, in this heating medium filling process, the mixing means is supplied from the heat source unit so as to be in the bypass path closed state. Regardless of the temperature of the heating medium, the mixing means avoids unnecessary restriction on the flow of the heating medium, and even if the actual mixing ratio changes due to the pressure of the heating medium, the mixing means In order to avoid unnecessary throttling of the flow of the heat medium as much as possible, the heat medium filling operation is performed when the heat medium is filled in the heat load and the heat medium circulation path after the system is installed. Command By carrying out the heat medium filling process, the heat medium from the heat source unit is not subjected to unnecessary restriction by the mixing means, and the entire amount of the heat medium is accurately transferred to the forward load circuit on the heat load side than the mixing means. The heat medium can be filled in the heat load and the heat medium circulation path while flowing in the portion.
Therefore, the heat medium can be filled in the heat load and the heat medium circulation path while accurately flowing the entire amount of the heat medium from the heat source device to the forward circulation path portion on the heat load side from the mixing means. As a result, the heat load and the heat medium circulation path can be filled with the heat medium reliably and in a short time after the system is installed.
[0010]
  Claim 1According to the invention described in the above, a part of the circulation path portion in which the bypass path of the heating medium circulation path is provided, the mixing means, and the heat load side circulation means are integrally formed as a mixing unit. Is provided.
  That is, a part of the circulation path provided with the bypass path in the heat medium circulation path, the mixing means, and the heat load side circulation means are integrally provided, so that the mixing can be performed only by installing the mixing unit. Means and heat load side circulation means can be installed,
Installation work such as mixing means and heat load side circulation means becomes easy.
[0011]
  Further claim 1According to the invention described above, the mixing unit is provided with a heating medium charging operation command means for commanding the heating medium charging operation.
[0012]
That is, it is conceivable to provide a heat medium charging operation command means for instructing a heat medium charging operation in a remote controller or a heat source machine that commands a control command to the control means. And other switches, etc., and when providing the heat medium charging operation command means to this remote control, it is necessary to coordinate with the operation switches and other switches already provided, and the structure is complicated accordingly. There is a risk of becoming.
Also, in the case where the heat medium charging operation command means is provided in the heat source machine, similarly, there is a possibility that the structure becomes complicated correspondingly, for example, it is necessary to coordinate with the equipment already provided.
[0013]
However, since the heating unit charging operation command means is provided in the mixing unit newly installed for the heating medium supply system, it is only necessary to simply provide the heating medium charging operation command means in the mixing unit. Compared with the case where the heat source machine is provided with the heat medium charging operation command means, the configuration becomes easier.
[0014]
  Claim2According to the invention described in (2), the heat medium detecting means for detecting the presence of the heat medium at the installation location of the heat load side circulation means in the heat medium circulation path is provided, and the control means is the heat medium. In the medium filling process, first, the circulating means is circulated and the mixing means is operated to close the bypass passage. When the heat medium detecting means detects the heat medium, the heat load side circulation is performed. It is configured to carry out the circulating operation of the means.
[0015]
That is, if the heat load side circulation means such as a pump is circulated in a state where no heat medium is present at the location where the heat load side circulation means is installed, the heat load side circulation means will be damaged. Although there is a problem of shortening the service life, if it is detected based on the detection information of the heat medium detection means that the heat medium is present at the installation location of the heat load side circulation means, the heat load side circulation Since the means is circulated, it is possible to circulate the heat load side circulator while the heat medium is always present at the location where the heat load side circulator is installed, thereby extending the life of the heat load circulator. It becomes possible to do.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
A heating medium supply system according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the heating medium supply system includes a floor heating panel 1 as a heat load, and circulation means for circulating the heating medium through a heating medium circulation path 2 connected to the floor heating panel 1. The heat source device 4 provided, and a mixing means 9 for adjusting the mixing ratio of the return heat medium from the bypass passage 3 provided in the middle of the heat medium circulation passage 2 and the forward heat medium from the heat source device 4 are provided. The mixing unit 5 and a remote control operation unit 7 for instructing an operation command to the control means 6 for managing the heat medium circulation operation are configured.
[0017]
The operation of the mixing unit 5 is managed by the unit-side control means 8, and a bypass path 3 is provided for bypassing the return heat medium of the return side circulation path portion 2 b in the heat medium circulation path 2 to the outgoing side circulation path portion 2 a. A mixing valve 9 as a mixing means for adjusting a mixing ratio of a part of the circulating path portion 2c to be returned, a return heat medium from the bypass path 3 and an outgoing heat medium from the heat source unit 4, and mixing by the mixing valve 9 A heat load side circulation pump 10 is provided as a heat load side circulation means for circulating the mixed heat medium that has been used to the floor heating panel 1 through the heat medium circulation path 2 and the bypass path 3.
Further, the mixing unit 5 is provided with a thermistor 11 as a heat medium detecting means for detecting the temperature of the mixed heat medium mixed by the mixing valve 9, and is provided in the forward side circulation path portion 2 a in the heat medium circulation path 2. A mixing valve 9, the thermistor 11, and a heat load side circulation pump 10 are provided in order from the heat source unit 4 side, and a part of the outgoing heat medium on the floor heating panel 1 side from the heat load side circulation pump 10 is returned to the bypass path 3. A unit bypass path 12 is provided for bypass flow to the return side circulation path portion 2b closer to the heat source unit 4 than the connection point with the side circulation path portion 2b.
[0018]
The mixing valve 9 will be described in detail. Although not shown in detail, the mixing valve 9 operates the valve main body by operating the stepping motor 13 to return the inlet of the return heat medium from the bypass passage 3 and the heat source. 3 is configured so as to adjust the mixing ratio of the return heat medium from the bypass passage 3 and the forward heat medium from the heat source machine 4 by adjusting the opening degree with the inlet of the forward heat medium from the machine 4. As shown in FIG. 5, the mixing ratio between the return heat medium from the bypass 3 and the forward heat medium from the heat source unit 4 is changed by changing the number of steps of the stepping motor 13.
In FIG. 3, the low temperature water side is a return heat medium from the bypass passage 3, and the high temperature water side is a forward heat medium from the heat source unit 4.
[0019]
As shown in FIG. 4, the operation of the heat source unit 4 is managed by the heat source unit side control unit 14, and a replenishing water tank 15 as a replenishing unit, a heat exchanger 17 as a heating unit 16, and this heat exchanger 17. Are provided with a burner 18, a circulation pump 19 as a circulation means, and the like.
Then, the heating medium return path 20 connected to the return side circulation path portion 2 b in the heating medium circulation path 2 is connected to the inlet side of the makeup water tank 15 and connected to the forward side circulation path portion 2 a in the heating medium circulation path 2. The heat medium forward passage 21 is connected to the outlet side of the heat exchanger 17, and a heat medium communication passage 22 that connects the outlet side of the makeup water tank 15 and the inlet side of the heat exchanger 17 is provided. A circulation pump 19 is provided in the middle of 22.
[0020]
A heat source unit bypass path 23 is provided for bypassing the heat medium flowing through the heat medium return path 21 to the heat medium return path 20, and the temperature of the heat medium flowing through the heat medium return path 20 is provided in the heat medium return path 20. A heating medium return thermistor 24 is provided, and the heating medium return path 21 is provided with a heating medium return thermistor 25 that detects the temperature of the heating medium flowing in the heating medium return path 21.
A tank water supply path 26 for supplying water to the makeup water tank 15 is provided with a makeup water valve 27 and a makeup water electromagnetic valve 28, and the makeup water tank 15 has an upper limit sensor 29 for detecting the upper limit of the water level and a water level sensor. A lower limit sensor 30 for detecting the lower limit is provided, and the makeup water valve 27 and the makeup water electromagnetic wave are maintained so that the water level of the makeup water tank 15 is maintained at a water level between the upper limit sensor and the lower limit sensor by the heat source unit side control means 14. The valve 28 is configured to be controlled. The overflow path 31 is also connected to the makeup water tank 15.
[0021]
The fuel supply passage 32 for supplying fuel gas to the burner 18 has an electromagnetically operated intermittent valve 33 for intermittently supplying the fuel, and an electromagnetically operated gas amount whose fuel supply amount (burner 18 combustion amount) can be changed and adjusted. A control valve 34 is provided, and a fan 35 for supplying combustion air to the burner 18 is also provided. In the vicinity of the burner 18, an igniter 36 for performing an ignition operation on the burner 18 and whether or not the burner 18 is ignited. And a frame rod 37 for detecting.
[0022]
The remote control operation unit 7 displays an operation switch 38 for instructing the heat medium circulation operation, a temperature setting switch 39 for setting the room temperature of the floor heating panel 1, a room temperature set by the temperature setting switch 39, and the like. The unit 40 and the like are provided.
A water filling switch 41 is provided on the substrate of the unit side control means 8 as a heat medium filling operation command means for instructing a heat medium filling operation.
[0023]
The control means 6 constituted by the unit side control means 8 and the heat source machine side control means 14, when the heat medium circulation operation is instructed by pushing the operation switch 38 of the remote control operation unit 7, the circulation pump 19 and the heat load side circulation pump 10 are circulated, the heating means 16 is heated so that the temperature of the forward heat medium from the heat source unit 4 becomes the heat source supply temperature, and the temperature of the mixed heat medium is the heat load. The heat medium circulation process is performed to mix and operate the mixing valve 9 so that the target temperature is reached.
Further, when the heating medium filling operation is commanded by the ON operation of the water filling switch 41, the control means 6 causes the circulation pump 19 and the heat load side circulation pump 10 to circulate, and the outgoing heat medium from the heat source unit 4 is circulated. The heating means 16 is heated so that the temperature becomes the temperature for supplying the heat source, and the mixing valve 9 is operated so that the heat medium does not flow through the bypass passage 3 or close to the bypass passage closed state (fully open state). It is comprised so that a heat medium filling process may be performed.
[0024]
When the heat medium circulation process is described further, the control means 6 is in a closed state of the bypass path (fully opened) in the absence of or close to the flow of the heat medium through the bypass path 3 as the heat medium circulation operation is commanded. In this state, the circulation pump 19 is circulated while the mixing valve 9 is gradually operated, and the heating means 16 is set so that the temperature of the forward heat medium from the heat source unit 4 becomes the heat source supply temperature (for example, 80 ° C.). When the heating operation is executed, the detected temperature of the thermistor 11 becomes equal to or higher than the set temperature for operation (for example, 54 ° C.), and the heat medium is detected at the location where the heat load side circulation pump 10 is installed, the heat load side circulation pump 10 Execute the operation.
When the set time elapses after the heat medium circulation operation is commanded and the set room temperature by the remote control operation unit 7 is in a low temperature state, the temperature of the mixed heat medium is set to the target temperature for heat load (for example, 56 ° C. The mixing valve 9 is mixed and operated so that the temperature becomes ˜64 ° C.).
[0025]
That is, in the heat medium circulation operation, as shown in FIG. 1, the forward heat medium from the heat source unit 4 is mixed with the return heat medium from the bypass path 3 by the mixing valve 9, and the heat load side circulation pump 10 is circulated. By the operation, the heat medium is circulated and supplied to the floor heating panel 1 through the heat medium circulation path 2 and the bypass path 3.
It should be noted that a part of the heat medium that flows in the forward-side circulation path part 2 a in the mixing unit 5 can flow to the heat source unit 4 through the unit bypass path 12, and a part of the return-side circulation path part 2 b in the mixing unit 5 It is possible to flow to the heat source unit 4 through the return side circulation path portion 2b to the heat source unit 4.
[0026]
Then, when the operation switch 38 of the remote control operation unit 7 is pushed again, the circulation operation of the circulation pump 19 and the heating operation of the heating means 16 are stopped, the operation of the heat source unit 4 is stopped, and the operation from the heat source unit 4 is stopped. The mixing valve 9 is operated so that the heat medium does not flow or close to the heat medium circulation path closed state (fully closed state), and the detected temperature of the thermistor 11 is equal to or lower than the set temperature for stopping (for example, 60 ° C.). If it becomes, it will be comprised so that the stop process of the heat medium circulation process which stops the circulation action of the heat load side circulation pump 10 may be performed.
[0027]
In addition to the description of the heat medium filling process, the heat medium filling process is executed when the water level of the makeup water tank 15 of the heat source device 4 is between the upper limit sensor 29 and the lower limit sensor 30. When the heat medium charging operation is commanded, the control means 6 first causes the circulation pump 19 to circulate so that the temperature of the forward heat medium from the heat source unit 4 becomes the heat source supply temperature (for example, 80 ° C.). The heating means 16 is heated and the mixing valve 9 is operated in a closed state (fully opened state) in which the heat medium does not flow through the bypass passage 3 or close to it, and the thermistor 11 is detected. When the temperature becomes equal to or higher than the set temperature for operation (for example, 54 ° C.) and the heat medium is detected at the installation location of the heat load side circulation pump 10, the operation of the heat load side circulation pump 10 is executed.
[0028]
In this embodiment, in the heat medium charging operation, the heating means 16 is heated so that the temperature of the outgoing heat medium from the heat source device 4 becomes the target temperature for heat source supply. You may make it fill the floor heating panel 1 and the heat-medium circulation path 2 with the water of the replenishment water tank 15 from the heat source machine 4 without heating operation.
[0029]
That is, in the heat medium charging operation, as shown in FIG. 2, the mixing valve 9 is operated in a state where the heat medium does not flow through the bypass path 3 or close to the bypass path (full open state), and the heat source machine 4 The total amount of the heat medium supplied from the heat source unit 4 is caused to flow accurately to the forward circulation path portion 2a closer to the floor heating panel 1 than the mixing valve 9, and the floor heating panel 1 and the heat medium circulation by the forward heat medium from the heat source unit 4. The heating medium in the path 2 is filled.
[0030]
In this manner, in the heat medium filling operation in which the floor heating panel 1 and the heat medium circulation path 2 are filled with the heat medium, the bypass path closed state (fully opened state) in which the heat medium does not flow through the bypass path 3 or close thereto. The mixing valve 9 is operated and the total amount of the heat medium supplied from the heat source device 4 is accurately flowed to the forward circulation portion 2a closer to the floor heating panel 1 than the mixing valve 9, so that the heat load and the heat medium circulation It has become possible to provide a heating medium supply system that can reliably fill a path with a heating medium in a short time.
[0031]
Further, in the heat medium circulation operation and the heat medium filling operation, when the detected temperature of the thermistor 11 becomes equal to or higher than the set temperature for operation (for example, 54 ° C.) and the heat medium is detected at the installation location of the heat load side circulation pump 10, By operating the heat load side circulation pump 10, it becomes possible to always circulate the heat load side circulation pump 10 in a state where the heat medium is present, and the heat load side circulation pump 10 is operated in a state where there is no heat medium. The circulation operation is performed to prevent the heat load side circulation pump 10 from being damaged, and the life of the heat load side circulation pump 10 can be maintained long.
Incidentally, since the heat medium is replenished to the installation location of the circulation pump 19 in the heat medium communication path 22 by the replenishment water tank 15, the circulation pump is in a state where the heat medium exists at the installation position of the circulation pump 19 in the heat medium communication path 22. The circulation pump 19 is circulated to prevent the circulation pump 19 from being idle, and the life of the circulation pump 19 can be maintained long.
[0032]
When the set time for stop elapses after the heat medium charging operation is instructed or when the water filling switch 41 is turned OFF, the circulation operation of the circulation pump 19 and the heating operation of the heating means 16 are stopped, and the heat source The operation of the machine 4 is stopped, and the mixing valve 9 is operated in the closed state (fully closed state) where the heat medium from the heat source machine 4 does not flow or is close thereto, and the thermistor 11 is detected. When the temperature becomes equal to or lower than the set temperature for stoppage, the heat medium filling process for stopping the circulation operation of the heat load side circulation pump 10 is executed.
[0033]
The unit-side control means 8 is connected to the remote control operation unit 7 so as to be capable of two-way communication. When the command for the heat medium circulation operation is instructed from the remote control operation unit 7, the unit side control means 8 manages the operation of the mixing unit 5 and When the heat medium circulation operation command is relayed to the heat source machine side control means 14 and the heat medium filling operation is instructed by the water filling switch 41 provided on the substrate of the unit side control means 8, the mixing unit 5 is managed, and the heat medium charging operation is instructed to the heat source apparatus side control means 14.
And the unit side control means 8 will detect the heat medium in the installation location of the heat load side circulation pump 10 when the detection temperature of the thermistor 11 becomes more than preset temperature based on the instruction | command of a heat medium circulation operation and a heat medium filling operation. The heat load side circulation pump 10 is circulated and the mixing operation of the mixing valve 9 is controlled so as to adjust the mixing ratio of the return heat medium from the bypass passage 3 and the forward heat medium from the heat source unit 4. It is configured.
[0034]
When the mixing operation of the mixing valve 9 is described, as the heat medium circulation operation is instructed, there is no flow of the heat medium through the bypass path 3, or the bypass path is closed (fully opened). Thus, the number of steps of the stepping motor 13 is gradually changed.
That is, by gradually changing the number of steps of the stepping motor 13 so that the heat medium does not flow through the bypass path 3 or close to the bypass path closed state (fully open state), the valve opens and closes rapidly. An abnormal pressure generated by mixing of water, that is, a water hammer is prevented.
[0035]
When the set time elapses after the heat medium circulation operation is instructed and the set room temperature by the remote control operation unit 7 is in the low temperature state, the temperature of the mixed heat medium becomes the target temperature for heat load (for example, 54 ° C. The number of steps of the stepping motor 13 is adjusted on the basis of the temperature detected by the thermistor 11 so that the temperature is about -64 ° C.
Further, when the heat medium filling command is instructed, the number of steps of the stepping motor 13 is changed so that the heat medium does not flow through the bypass path 3 or close to the bypass path closed state (fully open state). ing.
[0036]
The heat source machine side control means 14 circulates the circulation pump 19 based on a command from the remote control operation unit 7 relayed by the unit side control means 8 and the temperature of the outgoing heat medium from the heat source machine 4 is increased. The heating means 16 is configured to be heated so as to reach the heat source supply target temperature.
By the way, the heat source machine side control means 4
[0037]
The heating operation of the heating means 16 will be described. The ventilation operation by the fan 35 is started, and the intermittent valve 33 is opened to adjust the opening of the gas amount adjusting valve 34 so that the amount of ignition gas becomes the ignition gas amount. At the same time, the burner 18 is ignited by the igniter 36 and confirmed by the frame rod 37.
Thereafter, based on the circulation amount of the circulation pump 19, the detection information of the heating medium return thermistor 24, and the detection information of the heating medium return thermistor 25, the temperature of the outgoing heat medium from the heat source unit 4 is the target for supplying the heat source. The combustion amount of the burner 18 is adjusted so as to reach a temperature (for example, 80 ° C.).
[0038]
The heating medium circulation operation and the heating medium filling operation of the control means 6 will be described based on the flowcharts of FIGS.
First, the heat medium circulation operation will be described. When the operation switch 38 of the remote control operation unit 7 is pushed and the heat medium circulation operation is commanded, as shown in FIG. The operation of the heat source unit 4 is started by heating the means 16 and the mixing valve 9 is gradually operated so that the heat medium does not flow through the bypass passage or close to the bypass passage closed state (fully open state) (step 1). ).
When the detected temperature of the thermistor 11, that is, the thermistor temperature becomes equal to or higher than the set temperature for operation (for example, 54 ° C.), the heat load side circulation pump 10 is circulated and set for a set time after the heat medium circulation operation is commanded For example, after 30 minutes), when the low temperature operation is performed in which the set room temperature by the remote control operation unit 7 is in a low temperature state, the temperature of the mixed heat medium is set to the heat load target temperature (for example, 54 ° C. to 64 ° C.). Then, the mixing valve 9 is mixed and mixed (steps 2 to 6).
[0039]
In this way, the mixed heat medium in which the forward heat medium from the heat source device 4 and the return heat medium from the bypass path 3 are mixed by the mixing valve 9 is supplied to the floor heating panel 1 so as to heat the room. However, when the operation switch 38 of the remote control operation unit 7 is pressed again and a stop of the heat medium circulation operation is instructed, the circulation operation of the circulation pump 19 and the heating operation of the heating means 16 are stopped, and the heat source The operation of the machine 4 is stopped, and the mixing valve 9 is operated in a closed state (fully closed state) in which the heat medium from the heat source machine 4 does not flow or is close thereto (steps 7 and 8).
When the detected temperature of the thermistor 1, that is, the thermistor temperature becomes equal to or lower than the set temperature for stoppage (for example, 60 ° C.), the circulation operation of the heat load side circulation pump 10 is stopped (steps 9 and 10).
[0040]
Next, the heat medium filling process will be described. When the water filling switch 41 is turned ON and the heat medium filling operation is commanded, the circulation pump 19 is circulated and the heating means 16 is heated to activate the heat source unit 4. The operation is started, and the mixing valve 9 is operated so that the heat medium does not flow through the bypass passage or close to the bypass passage closed state (fully opened state) (step 11).
When the detected temperature of the thermistor 11, that is, the thermistor temperature becomes equal to or higher than the set temperature for operation (for example, 54 ° C.), the heat load side circulation pump 10 is operated (steps 12 and 13).
[0041]
In this way, the heating medium is filled in the floor heating panel 1 and the heating medium circulation path 2 in a closed state (fully opened state) where the heating medium does not flow through or close to the bypass path, and the heating medium charging operation is performed. When a set stop time (for example, 20 minutes) elapses after the command is issued, or when the water filling switch 41 is turned OFF to stop the heating medium charging operation, the circulation operation and heating of the circulation pump 19 are performed. The heating operation of the means 16 is stopped, the operation of the heat source unit 4 is stopped, and the mixing valve 9 is operated so that the heat medium flowing from the heat source unit 4 does not flow or is close to the heat medium circulation path closed state (fully closed state). (Steps 14 and 15).
When the detected temperature of the thermistor 11, that is, the thermistor temperature becomes equal to or lower than the set temperature for stoppage (for example, 60 ° C.), the circulation operation of the heat load side circulation pump 10 is stopped (steps 16 and 17).
[0044]
[Another embodiment]
(1In the above embodiment, in the heat medium circulation operation and the heat medium filling operation, when the detected temperature of the thermistor 11 is equal to or higher than the set temperature for operation and the heat medium is detected at the installation location of the heat load side circulation pump 10, the heat load side Although the circulation pump 10 is circulated, when the heat medium circulation operation and the heat medium filling operation are instructed, the heat load side circulation pump 10 may be circulated and the circulation of the heat load side circulation pump 10 may be performed. The operating conditions can be changed.
[0045]
(2In the above embodiment, the unit side control means 8 for managing the operation of the mixing unit 5 and the heat source apparatus side control means 14 for managing the operation of the heat source apparatus 4 are provided separately, but for example, the heat source apparatus 4 It is also possible to implement by providing a control means 6 for managing the operation of the mixing unit 5.
[Brief description of the drawings]
FIG. 1 is an overall schematic configuration diagram of a heating medium supply system.
FIG. 2 is an overall schematic configuration diagram of a heating medium supply system.
FIG. 3 is a diagram showing the number of steps and the mixing ratio of a stepping motor in a mixing valve.
FIG. 4 is an overall schematic configuration diagram of a heat source machine.
FIG. 5 is a flowchart showing the operation of the control means in the heat medium circulation operation.
FIG. 6 is a flowchart showing the operation of the control means in the heating medium charging operation.
[Explanation of symbols]
1 Heat load
2 Heat transfer circuit
3 Bypass
4 heat source machine
5 mixing units
6 Control means
9 Mixing means
10 Thermal load side circulation means
11 Heat medium detection means
15 Supply means
16 Heating means
19 Circulation means
41 Heating medium charging operation command means

Claims

A heat source comprising circulation means for circulating a heat medium through a heat medium circulation path connected to a heat load, heating means for heating the heat medium, and replenishment means for automatically replenishing the heat medium circulation path Machine is provided,
A bypass path is provided in the middle of the heating medium circulation path for bypassing the return heating medium of the return side circulation path part to the outgoing side circulation path part,
A mixing means for adjusting a mixing ratio of the return heat medium from the bypass passage and the forward heat medium from the heat source unit;
Heat load side circulation means for circulating the mixed heat medium mixed by the mixing means to the heat load through the heat medium circulation path and the bypass path;
And a control means for managing the heat medium circulation operation,
When the heat medium circulation operation is instructed by the control means, the circulation means and the heat load side circulation means are circulated and the temperature of the forward heat medium from the heat source unit becomes the heat source supply target temperature. A heating medium supply system configured to perform heating medium circulation processing to heat the heating means and to mix and operate the mixing means so that the temperature of the mixed heat medium becomes a target temperature for heat load; There,
When the control means is instructed to perform a heat medium filling operation for filling the heat load and the heat medium circulation path with the heat medium, the control means circulates the circulation means and the heat load side circulation means, and the bypass path The heat medium filling process is performed to operate the mixing means in a closed state of the bypass path in which the heat medium does not flow through or close to the heat medium ,
Of the heating medium circulation path, a part of the circulation path portion provided with the bypass path, the mixing means, and the heat load side circulation means are integrally provided as a mixing unit,
A heating medium supply system in which the mixing unit is provided with a heating medium charging operation command means for commanding the heating medium charging operation .

A heat medium detecting means for detecting the presence of the heat medium at an installation location of the heat load side circulation means in the heat medium circulation path is provided;
In the heat medium filling process, the control means first performs the circulation operation of the circulation means and the operation of the mixing means to the closed bypass path, and the heat medium detection means detects the heat medium. Then, the heat medium supply system according to claim 1 , wherein the heat load side circulation means is configured to circulate .