JP3981214B2

JP3981214B2 - One can multi-waterway hot water bath

Info

Publication number: JP3981214B2
Application number: JP34674298A
Authority: JP
Inventors: 清史花澤
Original assignee: 株式会社ガスター
Priority date: 1998-12-07
Filing date: 1998-12-07
Publication date: 2007-09-26
Anticipated expiration: 2018-12-07
Also published as: JP2000171097A

Description

【０００１】
【発明の属する技術分野】
本発明は、浴槽に設けた吸入口と吐出口との間を結ぶ追い焚き用循環流路と給水を通すための給湯流路とが所定の加熱装置で加熱される共通の熱交換器を経由した一缶多水路型給湯風呂釜であって、前記給湯流路から前記熱交換器の出側の所定箇所で分岐し前記追い焚き用循環流路に前記熱交換器を経由する部分以外の所定箇所で合流する注湯連絡管と、前記注湯連絡管の途中に設けられ前記給湯流路内の水を前記注湯連絡管を通じて前記追い焚き用循環流路側に流すか否かを切り替える注湯切替弁とを備え、前記給湯流路で加熱された湯を前記注湯連絡管および前記追い焚き用循環流路を通じて前記浴槽に流し込む注湯動作と給湯動作とを同時に行う際に前記加熱装置の加熱量が給湯側の温度を基準に制御されるものに関する。
【０００２】
【従来の技術】
従来から使用されている一缶多水路型給湯風呂釜は、給湯流路側で昇温された水を出湯栓へ導くほか、給湯流路側で昇温された水を電磁弁等を備えた注湯連絡管を介して追い焚き用循環流路側に流し込むことで浴槽へ注湯し得るようになっている。
【０００３】
注湯連絡管を通じて給湯流路側から追い焚き用循環流路の途中に送り込まれた水は、通常、いわゆるダブル搬送されて浴槽に注湯される。すなわち、給湯流路側から追い焚き用循環流路の途中に送り込まれた水は、再度、熱交換器を経由して浴槽に流れ込むものと、熱交換器を再度経由することなくそのまま浴槽に流れこむものの二手に分かれて浴槽に落とし込まれていた。このように二手に分かれた水のうち熱交換器を再度経由するものは、ここで再加熱されるので、給湯流路側で加熱した後の湯温よりもさらに高い温度になって浴槽へ落とし込まれていた。
【０００４】
特開平８−２３３３６３号公報には、注湯連絡管から追い焚き用循環流路に流れ込んだ水が、再度、熱交換器を経由することなく浴槽に落とし込まれるように構成した給湯装置が開示されている。この装置では、注湯連絡管が追い焚き用循環流路に合流する箇所に三方弁を設け、当該三方弁を境にして追い焚き用循環流路を熱交換器経由側と熱交換器非経由側とに分けている。
【０００５】
そして追い焚き時には、追い焚き循環流路の熱交換器経由側と熱交換器非経由側とを連通させて循環経路を構成し、注湯時には、注湯連絡管と熱交換器非経由側とが連通するように三方弁を切り換えるようになっている。これにより、注湯される水が、熱交換器非経由側のみを通じて浴槽に流れ込む（いわゆるシングル搬送になる）ので、落とし込み温度を容易に制御することが可能になっている。
【０００６】
【発明が解決しようとする課題】
ところで、一缶多水路型給湯風呂釜において注湯動作中に給湯側が同時に使用されると、通常、バーナの加熱量は給湯優先で制御されるので、上述のダブル搬送、シングル搬送のいずれの場合であっても、注湯温度を浴槽側設定温度に維持することができなかった。
【０００７】
このため、給湯動作が行われている間、注湯動作を中断することで注湯温度が浴槽側設定温度から外れることを防止するという対策が考えられるが、この場合には、給湯中は注湯動作が中断されるので、湯張り完了までに時間がかかるという問題が発生する。
【０００８】
一方、給湯動作が行われている間も注湯動作を継続する場合には、注湯動作の最終段階等で、浴槽内の湯温を浴槽側設定温度と一致させるために後処理を行う必要があった。すなわち、給湯側設定温度が浴槽側設定温度よりも低かった場合には、浴槽への落とし込み動作終了後に、浴槽側設定温度まで追い焚きを行う必要があり、逆に給湯側設定温度が浴槽側設定温度より高い場合には、これをうめるために低温度の湯を浴槽に落とし込み直す必要があった。したがって、注湯動作中に給湯動作が同時に行われた場合には、このような後処理を行う分だけ、入浴可能となるまでに長い時間がかかってしまう。また、低温度の湯を落とし込み直す場合には、熱交換器の低温腐食を招くという問題もあった。
【０００９】
本発明は、このような従来の技術が有する問題点に着目してなされたもので、注湯中に給湯側が同時使用されても注湯温度を浴槽側設定温度に維持することができ、短時間で湯張り動作を完了することのできる一缶多水路型給湯風呂釜を提供することを目的としている。
【００１０】
【課題を解決するための手段】
かかる目的を達成するための本発明の要旨とするところは、次の各項の発明に存する。
［１］浴槽（２００）に設けた吸入口（２０１）と吐出口（２０２）との間を結ぶ追い焚き用循環流路（４０）と給水を通すための給湯流路（２０）とが所定の加熱装置（１２）で加熱される共通の熱交換器（１３）を経由した一缶多水路型給湯風呂釜であって、前記給湯流路（２０）から前記熱交換器（１３）の出側の所定箇所で分岐し前記追い焚き用循環流路（４０）に前記熱交換器（１３）を経由する部分以外の所定箇所で合流する注湯連絡管（５０）と、前記注湯連絡管（５０）の途中に設けられ前記給湯流路（２０）内の水を前記注湯連絡管（５０）を通じて前記追い焚き用循環流路（４０）側に流すか否かを切り替える注湯切替弁（５１）とを備え、前記給湯流路（２０）で加熱された湯を前記注湯連絡管（５０）および前記追い焚き用循環流路（４０）を通じて前記浴槽（２００）に流し込む注湯動作と給湯動作とを同時に行う際に前記加熱装置（１２）の加熱量が給湯側の温度を基準に制御されるものにおいて、
注湯経路切替手段（４４）と、注湯経路切替制御手段（１１２）と、設定温度比較手段（１１１）とを備え、
前記設定温度比較手段（１１１）は、浴槽側設定温度と給湯側設定温度とを比較するものであり、
前記注湯経路切替手段（４４）は、前記注湯連絡管（５０）を通じて前記追い焚き用循環流路（４０）内に流れ込んだ水の一部または全部が前記熱交換器（１３）を再度経由して前記浴槽（２００）に流れ込む再加熱状態と前記注湯連絡管（５０）を通じて前記追い焚き用循環流路（４０）内に流れ込んだ水の全部が前記熱交換器（１３）を再度経由することなく前記浴槽（２００）に流れ込む非再加熱状態とに注湯時の経路状態を切り換えるものであり、
前記注湯経路切替制御手段（１１２）は、給湯動作と注湯動作とが同時に行われかつ給湯側設定温度が浴槽側設定温度よりも低いときは前記再加熱状態が形成されるように前記注湯経路切替手段（４４）を設定し、給湯動作と注湯動作とが同時に行われかつ給湯側設定温度が浴槽側設定温度と等しいかまたは高いときは前記非再加熱状態が形成されるように前記注湯経路切替手段（４４）を設定するものであることを特徴とする一缶多水路型給湯風呂釜。
【００１１】
［２］浴槽（２００）に設けた吸入口（２０１）と吐出口（２０２）との間を結ぶ追い焚き用循環流路（４０）と給水を通すための給湯流路（２０）とが所定の加熱装置（１２）で加熱される共通の熱交換器（１３）を経由した一缶多水路型給湯風呂釜であって、前記給湯流路（２０）から前記熱交換器（１３）の出側の所定箇所で分岐し前記追い焚き用循環流路（４０）に前記熱交換器（１３）を経由する部分以外の所定箇所で合流する注湯連絡管（５０）と、前記注湯連絡管（５０）の途中に設けられ前記給湯流路（２０）内の水を前記注湯連絡管（５０）を通じて前記追い焚き用循環流路（４０）側に流すか否かを切り替える注湯切替弁（５１）とを備え、前記給湯流路（２０）で加熱された湯を前記注湯連絡管（５０）および前記追い焚き用循環流路（４０）を通じて前記浴槽（２００）に流し込む注湯動作と給湯動作とを同時に行う際に前記加熱装置（１２）の加熱量が給湯側の温度を基準に制御されるものにおいて、
注湯経路切替手段（４４）と、注湯経路切替制御手段（１１２）と、設定温度比較手段（１１１）と、給水混合流路（６０）と、混合量調整弁（６１）と、混合量制御手段（１１４）とを備え、
前記設定温度比較手段（１１１）は、浴槽側設定温度と給湯側設定温度とを比較するものであり、
前記注湯経路切替手段（４４）は、前記注湯連絡管（５０）を通じて前記追い焚き用循環流路（４０）内に流れ込んだ水の一部または全部が前記熱交換器（１３）を再度経由して前記浴槽（２００）に流れ込む再加熱状態と前記注湯連絡管（５０）を通じて前記追い焚き用循環流路（４０）内に流れ込んだ水の全部が前記熱交換器（１３）を再度経由することなく前記浴槽（２００）に流れ込む非再加熱状態とに注湯時の経路状態を切り換えるものであり、
前記注湯経路切替制御手段（１１２）は、給湯動作と注湯動作とが同時に行われかつ給湯側設定温度が浴槽側設定温度よりも低いときは前記再加熱状態が形成されるように前記注湯経路切替手段（４４）を設定し、給湯動作と注湯動作とが同時に行われかつ給湯側設定温度が浴槽側設定温度と等しいかまたは高いときは前記非再加熱状態が形成されるように前記注湯経路切替手段（４４）を設定するものであり、
前記給水混合流路（６０）は、前記給湯流路（２０）から前記熱交換器（１３）の入側の所定箇所で分岐しかつ前記追い焚き用循環流路（４０）に所定箇所で合流したものであり、
前記混合量調整弁（６１）は、前記給水混合流路（６０）を通じて前記追い焚き用循環流路（４０）に流し込む給水の流量を調整するものであり、
前記混合量制御手段（１１４）は、給湯動作と注湯動作とが同時に行われているときであって前記混合量調整弁（６１）を閉じた状態では前記浴槽（２００）への注湯温度が前記浴槽側設定温度より高くなるとき、前記混合量調整弁（６１）を開いて前記給水混合流路（６０）から前記追い焚き用循環流路（４０）に給水を流し込むものであることを特徴とする一缶多水路型給湯風呂釜。
【００１２】
［３］浴槽（２００）に設けた吸入口（２０１）と吐出口（２０２）との間を結ぶ追い焚き用循環流路（４０）と給水を通すための給湯流路（２０）とが所定の加熱装置（１２）で加熱される共通の熱交換器（１３）を経由した一缶多水路型給湯風呂釜であって、前記給湯流路（２０）から前記熱交換器（１３）の出側の所定箇所で分岐し前記追い焚き用循環流路（４０）に前記熱交換器（１３）を経由する部分以外の所定箇所で合流する注湯連絡管（５０）と、前記注湯連絡管（５０）の途中に設けられ前記給湯流路（２０）内の水を前記注湯連絡管（５０）を通じて前記追い焚き用循環流路（４０）側に流すか否かを切り替える注湯切替弁（５１）とを備え、前記給湯流路（２０）で加熱された湯を前記注湯連絡管（５０）および前記追い焚き用循環流路（４０）を通じて前記浴槽（２００）に流し込む注湯動作と給湯動作とを同時に行う際に前記加熱装置（１２）の加熱量が給湯側の温度を基準に制御されるものにおいて、
注湯経路切替手段（４４）と、注湯経路切替制御手段（１１２）と、給水混合流路（６０）と、混合量調整弁（６１）と、混合量制御手段（１１４）とを備え、
前記注湯経路切替手段（４４）は、前記注湯連絡管（５０）を通じて前記追い焚き用循環流路（４０）内に流れ込んだ水の一部または全部が前記熱交換器（１３）を再度経由して前記浴槽（２００）に流れ込む再加熱状態と前記注湯連絡管（５０）を通じて前記追い焚き用循環流路（４０）内に流れ込んだ水の全部が前記熱交換器（１３）を再度経由することなく前記浴槽（２００）に流れ込む非再加熱状態とに注湯時の経路状態を切り換えるものであり、
前記給水混合流路（６０）は、前記給湯流路（２０）から前記熱交換器（１３）の入側の所定箇所で分岐しかつ前記追い焚き用循環流路（４０）に所定箇所で合流したものであり、
前記混合量調整弁（６１）は、前記給水混合流路（６０）を通じて前記追い焚き用循環流路（４０）に流し込む給水の流量を調整するものであり、
前記混合量制御手段（１１４）は、給湯動作と注湯動作とが同時に行われているとき、前記浴槽（２００）への注湯温度が浴槽側設定温度になるように前記混合量調整弁（６１）の開度を制御するものであり、
前記注湯経路切替制御手段（１１２）は、常時は前記再加熱状態が形成されるように前記注湯経路切替手段（４４）を設定するとともに、給湯動作と注湯動作とが同時に行われているときであって前記混合量調整弁（６１）を全開にしても前記浴槽（２００）への注湯温度が前記浴槽側設定温度より高くなったとき、前記非再加熱状態が形成されるように前記注湯経路切替手段（４４）を設定するものであることを特徴とする一缶多水路型給湯風呂釜。
【００１３】
［４］前記注湯経路切替手段（４４）は、流路を開通させるか閉鎖するかを切り換える切替弁（４４）であって、前記注湯連絡管（５０）が前記追い焚き用循環流路（４０）に合流する箇所を境に前記追い焚き用循環流路（４０）を熱交換器経由側と熱交換器非経由側とに分けたうち、前記熱交換器経由側の配管部分に取り付けたものであることを特徴とする［１］、［２］または［３］記載の一缶多水路型給湯風呂釜。
【００１５】
［５］前記注湯連絡管（５０）を通じて前記追い焚き用循環流路（４０）内に流れ込んだ水のうち少なくとも前記熱交換器（１３）を再度経由して前記浴槽（２００）に流れ込む側の水量を調整する水量調整手段（５２）を具備することを特徴とする［１］、［２］、［３］または［４］記載の一缶多水路型給湯風呂釜。
【００１６】
前記本発明は次のように作用する。
注湯経路切替手段（４４）は、注湯連絡管（５０）を通じて追い焚き用循環流路（４０）内に流れ込んだ水の一部または全部が熱交換器（１３）を再度経由して浴槽（２００）に流れ込む再加熱状態と、注湯連絡管（５０）を通じて追い焚き用循環流路（４０）内に流れ込んだ水の全部が熱交換器（１３）を再度経由することなく浴槽（２００）に流れ込む非再加熱状態とに注湯時の経路状態を切り換える。
【００１７】
たとえば、注湯経路切替手段（４４）は、流路を開通させるか閉鎖するかを切り換える切替弁（４４）であって、注湯連絡管（５０）が追い焚き用循環流路（４０）に合流する箇所を境に追い焚き用循環流路（４０）を熱交換器経由側と熱交換器非経由側とに分けたうち熱交換器経由側の配管部分に取り付けたもので構成する。そして、この切替弁（４４）を開くことによって再加熱状態を形成し、切替弁（４４）を閉じることによって非再加熱状態を形成する。
【００１８】
なお注湯経路切替手段（４４）を、熱交換器（１３）を迂回するためのバイパス路と、注湯連絡管（５０）から追い焚き用循環流路（４０）に流入した水を熱交換器（１３）側に流すか先のバイパス路側に流して熱交換器（１３）を迂回させるかを切り換える切替弁（４４）とから構成してもよい。
【００１９】
設定温度比較手段（１１１）は、浴槽側設定温度と給湯側設定温度とを比較し、注湯経路切替制御手段（１１２）は、給湯動作と注湯動作とが同時に行われかつ給湯側設定温度が浴槽側設定温度よりも低いとき、再加熱状態が形成されるように注湯経路切替手段（４４）を設定する。また給湯動作と注湯動作とが同時に行われかつ給湯側設定温度が浴槽側設定温度と等しいかまたは高いとき、非再加熱状態が形成されるように注湯経路切替手段（４４）を設定する。
【００２０】
これにより給湯と注湯との同時使用時に給湯側設定温度が浴槽側設定温度よりも低いときは、注湯連絡管（５０）から追い焚き用循環流路（４０）に流れ込んだ水の一部または全部が熱交換器（１３）で再加熱されて浴槽（２００）に至り、給湯側設定温度が浴槽側設定温度よりも低くないときは、熱交換器（１３）で再加熱されることなく浴槽（２００）に流れ込むことになる。
【００２１】
このように、給湯と注湯とが同時使用されかつ給湯側設定温度が浴槽側設定温度より低いときだけ注湯連絡管（５０）から流れ込んだ水を熱交換器（１３）で再加熱し、給湯側設定温度が浴槽側設定温度より低くないときには注湯連絡管（５０）から流れ込んだ水が熱交換器（１３）で再加熱されないように注湯経路を切り換えるので、どのような設定温度で給湯側が同時に使用されても、浴槽側設定温度に近い温度あるいは一致した温度で、注湯動作を継続することができ、湯張り完了までに要する時間を短縮することができる。
【００２２】
また熱交換器（１３）を再度経由する水の流量を制御する水量調整手段（５２）を具備するものでは、たとえば、給湯側設定温度と浴槽側設定温度の違いに応じて再加熱する水の流量を適切な値に調整することができる。
【００２３】
給水混合流路（６０）と、この給水混合流路（６０）内の流量を調整するための混合量調整弁（６１）と、混合量調整弁（６１）の開度を制御する混合量制御手段（１１４）とをさらに備えたものでは、給湯と注湯との同時使用時であって混合量調整弁（６１）を閉じたままでは浴槽（２００）への注湯温度が浴槽側設定温度より高くなるとき、混合量調整弁（６１）を開いて給水混合流路（６０）から追い焚き用循環流路（４０）に給水を流し込むようになっている。
【００２４】
このように、給湯側設定温度が浴槽側設定温度より高いときなど浴槽（２００）への注湯温度が浴槽側設定温度より高くなるときに、給水混合流路（６０）から加熱前の給水を混合するので、高温で給湯側が同時に使用されても、適切な温度で浴槽（２００）に湯張りすることができる。なお、給湯設定温度が浴槽側設定温度よりも低いときは、再加熱状態が形成されて熱交換器（１３）での再加熱が行われるが、この再加熱の結果、注湯温度が浴槽側設定温度を越えてしまうような場合にも給水混合流路（６０）から給水を混合することで、適切な温度での注湯が可能になる。もちろん再加熱される側の流量を水量調整手段（５２）によって調整してもよいし、給水の混合量と再加熱する流量の双方を調整することで注湯温度を浴槽側設定温度に合わせるように制御してもよい。
【００２５】
また、給湯動作と注湯動作とが同時に行われているとき、できるだけ、再加熱状態を形成しておき、混合量調整弁（６１）の開度（給水の混合量）によって浴槽（２００）への注湯温度が浴槽側設定温度と一致するように制御する。そして、混合量調整弁（６１）を全開にしても浴槽（２００）への注湯温度が浴槽側設定温度より高くなるときだけ、非再加熱状態が形成されるように注湯経路切替手段（４４）を設定する。
【００２６】
このように、給水の混合量で調整可能なうちは熱交換器（１３）での再加熱を行うので、単位時間当たりの注湯流量が増加し、湯張り時間をより一層短縮することができる。なお、混合量調整弁（６１）を全開にしても注湯温度が浴槽側設定温度を越えるときに一気に非再加熱状態に移行させず、混合量調整弁（６１）の開度ができるだけ大きくなるように再加熱側への流量を水量制御手段（５２）で徐々に制限するようにしてもよい。
【００２７】
このほか、注湯連絡管（５０）を通じて追い焚き用循環流路（４０）内に流れ込んだ水の一部が熱交換器（１３）を再度経由して浴槽（２００）に流れ込む状態を常に形成しておき、給水の混合量を増減させることだけで注湯温度を浴槽側設定温度に近づけるようにしてもよい。
【００２８】
【発明の実施の形態】
以下、図面に基づき本発明の各種実施の形態を説明する。
図１は、本発明の第１の実施の形態にかかる一缶多水路型給湯風呂釜１０の構成を示している。一缶多水路型給湯風呂釜１０は、所定の水栓へ給湯する給湯動作と、浴槽２００内の湯を追い焚きする追い焚き動作と、給湯側で加熱した湯を浴槽２００に注ぎ込む注湯動作の各動作を行う機能を備えている。
【００２９】
図１に示すように、一缶多水路型給湯風呂釜１０は、燃焼室１１を備えており、当該燃焼室１１の下部には、バーナ１２が、燃焼室１１の上部には、バーナ１２からの熱を給水等に伝えるための熱交換器１３がそれぞれ配置されている。熱交換器１３には、給水を流すための給湯流路２０と、追い焚き用に浴槽２００内の水を循環させるための追い焚き用循環流路４０の双方が通っており、熱交換器１３はバーナ１２からの熱をこれら双方の流路内の流体に伝えて加熱する、いわゆる一缶二水路型になっている。
【００３０】
給湯流路２０は、熱交換器１３のフィンプレートから受熱する配管部分である給湯系受熱管２１と、一端が給湯系受熱管２１の入側に接続され、他端側が給水の供給元に通じる給水管２２と、給湯系受熱管２１の出側から延びる給湯管２３とから構成されている。給水管２２の途中には、通水量を検知するための水量センサ２４が、また給水管２２のうち器具１０の入口部近傍には、流れ込む給水の温度を検出するための入水サーミスタ２５が設けてある。
【００３１】
給湯管２３のうち給湯系受熱管２１の出側近傍には、給湯系受熱管２１で加熱された後の水温を検知する熱交サーミスタ２６が配置されている。また給湯管２３のうち熱交サーミスタ２６よりも下流側の所定箇所には、給湯流路２０を通じて出湯される湯量を調整するための第１水量制御弁２７があり、その下流には、給湯確認および給湯側の出湯流量を検知するための出湯側水量センサ２８が取り付けられている。
【００３２】
給水管２２のうち熱交換器１３への入側近傍箇所と給湯管２３のうち熱交サーミスタ２６と第１水量制御弁２７の間の所定箇所との間には、熱交換器１３を迂回させて給水管２２からの給水を給湯管２３に直接流し込むための固定バイパス路３０が設けてある。また、給水管２２のうち水量センサ２４よりも給水入側（上流側）の所定箇所と給湯管２３のうち第１水量制御弁２７と出湯側水量センサ２８の間の所定箇所との間には、熱交換器１３を迂回させて給水管２２からの給水を給湯管２３に流し込むための可変バイパス路３１が設けてある。この可変バイパス路３１の途中には、給湯管２３に流し込む水量を調整するための第２水量制御弁３２が取り付けてある。また可変バイパス路３１が合流する箇所よりも出湯側水量センサ２８寄りの箇所には、出湯温度を検知するための出湯サーミスタ２９が配置されている。
【００３３】
追い焚き用循環流路４０は、熱交換器１３のフィンプレートから受熱する配管部分である追い焚き受熱管４１と、追い焚き受熱管４１の熱交換器入側と浴槽２００に設けた吸入口２０１との間を接続する追い焚き戻り管４２と、追い焚き受熱管４１の熱交換器出側と浴槽２００に設けた吐出口２０２との間を接続する追い焚き往き管４３とから構成されている。
【００３４】
追い焚き往き管４３の途中には、流路を閉鎖するか開通させるかを切り換えるための電磁弁４４が設けて有る。また、出湯サーミスタ２９と出湯側水量センサ２８との間にある分岐箇所から分岐した注湯連絡管５０が、電磁弁４４よりもやや吐出口２０２寄りの合流箇所４５で追い焚き往き管４３に合流している。この合流箇所４５を境に追い焚き用循環流路４０は、吐出口２０２側に延びる熱交換器非経由側と、熱交換器１３を再度経由して吸入口２０１に通じる熱交換器経由側の２つに区分けされることになる。
【００３５】
注湯連絡管５０の途中には、当該注湯連絡管５０を閉鎖するか開通させるかを切り替えるための注湯電磁弁５１と、注湯連絡管５０内の流量を調整するための閉止機能つき注湯水量制御弁５２が設けてある。注湯電磁弁５１を開くことで、給湯系受熱管２１で加熱された湯が注湯連絡管５０を通じて合流箇所４５から追い焚き用循環流路４０内へ流れ込み、当該追い焚き用循環流路４０を通じて浴槽２００へ注湯できるようになっている。なお注湯電磁弁５１は閉止機能のないものであってもよい。
【００３６】
給水管２２のうち可変バイパス路３１の分岐箇所と水量センサ２４との間の所定箇所からは、給水混合流路６０が分岐しており、当該給水混合流路６０は、合流箇所４５よりも吐出口２０２寄りの給水合流箇所４６で追い焚き往き管４３に合流している。給水混合流路６０の途中には、管内の通水量を調整するための閉止機能つき混合水量制御弁６１が設けて有る。また混合水量制御弁６１よりも給水合流箇所４６寄りに、給水合流箇所４６側から給水混合流路６０側に向けての逆流を防止するための逆止弁６２が取り付けて有る。
【００３７】
追い焚き往き管４３のうち給水合流箇所４６よりもさらに吐出口２０２寄りには、配管内の湯温を検出するための落とし込みサーミスタ４７と、吐出口２０２から注湯される湯量を検出するための注湯水量センサ４８が設けて有る。追い焚き往き管４３のうち注湯水量センサ４８よりもさらに吐出口２０２寄りの所定箇所には、浴槽２００内の水位を検出するための圧力センサ４９が配置してある。
【００３８】
追い焚き戻り管４２の途中には、追い焚き用循環流路４０を通じて浴槽２００内の湯を強制循環するための循環ポンプ７１と、追い焚き戻り管４２内での通水の有無を検出するための風呂流水スイッチ７２とが設けて有る。また風呂流水スイッチ７２の近傍には、管内の温度、すなわち、循環ポンプ７１を駆動することによって吸入口２０１から流れ込む浴槽内の水の温度を検出するための風呂サーミスタ７３が取り付けてある。
【００３９】
給排気は、燃焼ファン１４によって燃焼室１１の下方側から給気を送風することによって強制的に行われ、排気は燃焼室１１の上部から排出されるようになっている。バーナ１２の近傍には、図示しない点火装置が設けてある。またバーナ１２へ供給される燃焼ガスは、ガス電磁弁１６、元ガス電磁弁１７、ガス切替弁１８によってオンオフ制御される。さらにバーナ１２へ供給される燃焼ガスのガス量は、ガス比例弁１９によって調整される。
【００４０】
一缶多水路型給湯風呂釜１０は、給湯動作、注湯動作、追い焚き動作など各種の動作を制御するための制御部１００を備えている。制御部１００には、電磁弁４４、注湯電磁弁５１、注湯水量制御弁５２、混合水量制御弁６１、通水量を検出するための水量センサ２４、出湯側水量センサ２８、注湯水量センサ４８、各種のサーミスタ２５、２６、４７、７３、循環ポンプ７１、圧力センサ４９、バーナ１２の燃焼を制御するための点火装置やガス電磁弁や比例弁など各種の制御部品やセンサ類が簡略図示した配線１０１によって電気的に接続されている。また制御部１００には、給湯側設定温度や浴槽側設定温度等の設定や、風呂の追い焚き動作や注湯動作の開始指示等を受け付けるための図示しないリモコンが接続されている。このリモコンは浴室等に設置されるものである。
【００４１】
制御部１００は、上述のリモコンによって設定された給湯側設定温度と浴槽側設定温度とを比較する設定温度比較手段１１１と、電磁弁４４の開閉を制御する注湯経路切替制御手段１１２と、注湯水量制御弁５２の開度を制御する注湯流量制御手段１１３と、混合水量制御弁６１の開度を制御する混合流量制御手段１１４の各機能を備えている。なお制御部１００はＣＰＵ（中央処理装置）と、ＲＯＭ（リード・オンリ・メモリ）とＲＡＭ（ランダム・アクセス・メモリ）とを主要部とする回路で構成されている。
【００４２】
次に作用を説明する。
注湯動作を行う際には、注湯電磁弁５１が開かれ、加熱された水が、給湯流路２０側から注湯連絡管５０を通じて追い焚き用循環流路４０側に流れ込む。このとき電磁弁４４を開状態に設定しておくと、注湯連絡管５０を通じて合流箇所４５に流れ込んだ水は吐出口２０２側に向けて流れるものと、熱交換器１３を再度経由して吸入口２０１側に流れるものの二手に分かれて浴槽２００に落とし込まれる。すなわち、電磁弁４４を開くことで、注湯経路は熱交換器経由側にも水の流れる再加熱状態になり、いわゆるダブル搬送が行われる。
【００４３】
一方、電磁弁４４を閉止しておくと、注湯連絡管５０を通じて合流箇所４５に流れ込んだ水は、吐出口２０２側に向かってのみ流れ、熱交換器１３を経由して吸入口２０１側に向かって流れることはない。すなわち、電磁弁４４を閉じることで、注湯経路は熱交換器非経由側にだけ水の流れる非再加熱状態となり、いわゆるシングル搬送が行われる。
【００４４】
図２は、一缶多水路型給湯風呂釜１０の行う動作の流れを示している。初期状態では、電磁弁４４は開いているものとする。給湯動作が単独で行われている間は（ステップＳ３０１；Ｙ、Ｓ３０３；Ｎ、Ｓ３０４；Ｎ）、給湯側設定温度に応じた温度の湯が出湯されるように、バーナ１２の燃焼量等を調整する給湯制御（ステップＳ３０２）が行われる。
【００４５】
一方、注湯動作が単独で行われている間は（ステップＳ３０１；Ｎ、Ｓ３０５；Ｙ、Ｓ３０７；Ｎ、Ｓ３０８；Ｎ）、浴槽側設定温度に応じた温度の湯が浴槽２００へ注湯されるようにバーナ１２の燃焼量等を調整する落とし込み制御（ステップＳ３０６）が実行される。注湯動作を終了する場合は（ステップＳ３０８；Ｙ）、電磁弁４４（Ｖ）を開き（ステップＳ３０９；Ｎ、Ｓ３１０）、注湯電磁弁５１（Ｓ）、注湯水量制御弁５２（ＭＨ）、混合水量制御弁６１（ＭＬ）をそれぞれ閉じる処理を行う（ステップＳ３１１）。
【００４６】
給湯中に注湯動作が開始された場合（ステップＳ３０３；Ｙ）および注湯中に給湯動作が開始されたときは（ステップＳ３０７；Ｙ）、以下の処理に移行する。なお、給湯と注湯の同時使用中は、給湯側の温度を基準に、すなわち給湯優先でバーナ１２の燃焼量が制御される。
【００４７】
注湯動作の有無は、内部のフラグ等によって識別され、給湯動作の有無は、出湯側水量センサ２８および水量センサ２４が通水を検出しているか否かで判別される。すなわち、水量センサ２４と出湯側水量センサ２８の双方が通水を検知しているときは、給湯単独あるいは注湯と給湯との同時使用のいずれかであり、先の内部フラグの状態と合わせることで給湯単独使用か給湯注湯同時使用かが判別される。
【００４８】
一方、注湯単独使用の場合には、水量センサ２４は通水を検出するが、出湯側水量センサ２８は通水を検出しないので、この条件により同時使用か否かを判別することができる。したがって、たとえば注湯単独動作中に給湯動作が始まったことは出湯側水量センサ２８が通水を検知し始めたことによって認識される。
【００４９】
給湯動作と注湯動作の同時使用が始まると、まず、設定温度比較手段１１１によって給湯側設定温度（ＴＫ）と浴槽側設定温度（ＴＢ）とが比較される。ここで給湯側設定温度（ＴＫ）が浴槽側設定温度（ＴＢ）よりも低いときは（ステップＳ３１２；Ｎ）、同時フラグのオンオフを判別し（ステップＳ３１６）、同時フラグがオフの場合には（ステップＳ３１６；Ｙ）、再加熱初期制御処理（ステップＳ３１７）を実行する。
【００５０】
給湯側設定温度（ＴＫ）と浴槽側設定温度（ＴＢ）とが等しいときは（ステップＳ３１２；Ｙ、Ｓ３１３；Ｙ）、同時フラグのオンオフを判別し（ステップＳ３１４）、同時フラグがオフの場合には（ステップＳ３１４；Ｙ）、後述する等温度初期制御処理（ステップＳ３１５）を実行する。
【００５１】
給湯側設定温度（ＴＫ）が浴槽側設定温度（ＴＢ）よりも高いときは（ステップＳ３１２；Ｙ、Ｓ３１３；Ｎ）、同時フラグのオンオフを判別し（ステップＳ３１８）、同時フラグがオフの場合には（ステップＳ３１８；Ｙ）、後述する非再加熱初期制御処理（ステップＳ３１９）を実行する。なお、同時フラグは、給湯側設定温度（ＴＫ）と浴槽側設定温度（ＴＢ）との比較結果に応じた初期制御処理を既に実行したか否かを示すための内部フラグである。
【００５２】
給湯と注湯の同時使用が継続している間は（ステップＳ３２０；Ｎ、Ｓ３２１；Ｎ）、同時フラグをオンにする（ステップＳ３２２）。続いて給湯側設定温度（ＴＫ）または浴槽側設定温度（ＴＢ）が変更されたか否かを判別する（ステップＳ３２３）。少なくとも一方の設定温度が変更されたときは（ステップＳ３２３；Ｎ）、同時フラグをオフにしてから（ステップＳ３２４）、給湯側設定温度（ＴＫ）と浴槽側設定温度（ＴＢ）とを比較する処理（ステップＳ３１２）へ戻る。一方、給湯側設定温度（ＴＫ）と浴槽側設定温度（ＴＢ）のいずれもが変更されていないときは、同時フラグをオンした状態のままでステップＳ３１２に戻る。
【００５３】
上述の処理により、給湯と注湯の同時使用が開始されたときと、同時使用中に給湯側設定温度（ＴＫ）または浴槽側設定温度（ＴＢ）が変更されたときだけ、再加熱初期制御処理と、等温度初期制御処理と、非再加熱初期制御処理のうちのいずれかの初期制御処理が実行されることになる。これらの初期制御処理は、給湯と注湯とが同時使用されることによってバーナ１２の燃焼制御が給湯優先で行われる状態になっても、浴槽２００への落とし込み温度が浴槽側設定温度（ＴＢ）と一致あるいはこれに近づくように、給湯側設定温度（ＴＫ）と浴槽側設定温度（ＴＢ）との比較結果に応じて電磁弁４４の開閉状態や注湯電磁弁５１、注湯水量制御弁５２の開度等を制御するものである。
【００５４】
注湯と給湯の同時使用が行われている間に、注湯動作が先に終了した場合は（ステップＳ３２０；Ｙ）、同時フラグをオフにし（ステップＳ３２６）、電磁弁４４（Ｖ）を開き（ステップＳ３２７；Ｎ、Ｓ３２８）、注湯電磁弁５１（Ｓ）、注湯水量制御弁５２（ＭＨ）、混合水量制御弁６１（ＭＬ）をそれぞれ閉じる処理を行う（ステップＳ３２９）。その後、給湯動作がまだ継続しているので、ステップＳ３０３に戻って給湯制御（ステップＳ３０２）が実行される。
【００５５】
一方、給湯動作が先に終了した場合は（ステップＳ３２１；Ｙ）、同時フラグをオフにした後（ステップＳ３２５）、まだ注湯動作が継続しているので、ステップＳ３０７に戻る。
【００５６】
次に、等温度初期制御処理について説明する。図３は、等温度初期制御処理の流れを示している。この処理では、まず、電磁弁４４を閉じる（ステップＳ４０１）。等温度初期制御処理が実行されるときは、給湯側設定温度（ＴＫ）と浴槽側設定温度（ＴＢ）とが等しい場合なので、給湯流路２０側で加熱された後の湯を、熱交換器１３を再度経由させることなく、そのまま浴槽２００に落とし込めば、浴槽側設定温度（ＴＢ）が満足される。そこで、電磁弁４４を閉じて熱交換器１３で再加熱される側の注湯経路に注湯連絡管５０からの水が流れないように注湯経路を設定する。
【００５７】
また注湯電磁弁５１および注湯水量制御弁５２が開いているか否かを調べ（ステップＳ４０２）、閉じている場合（ステップＳ４０２；Ｎ）には、これらを開く（ステップＳ４０３）。また同時使用が開始されることによって、給湯側の出湯流量が不足したような場合には、注湯水量制御弁５２の開度が調整される（ステップＳ４０４；Ｙ、Ｓ４０５）。なお、注湯電磁弁５１および注湯水量制御弁５２が閉じているのは、同時使用が開始されてから初めていずれかの初期制御処理を実行する場合であって、同時使用が開始される前の状態が給湯単独使用であったときである。
【００５８】
このほか、図３では示していないが、同時使用中に給湯側設定温度（ＴＫ）や浴槽側設定温度（ＴＢ）が変更された場合には混合水量制御弁６１が開いている場合が有り得るので、この場合には、混合水量制御弁６１を閉じるようになっている。
【００５９】
図４は、非再加熱初期制御処理の流れを示している。非再加熱初期処理が実行されるのは、給湯側設定温度（ＴＫ）が浴槽側設定温度（ＴＢ）よりも高い場合であるので、非再加熱初期制御処理では、熱交換器１３で再加熱が行われないように注湯経路を設定するとともに、加熱前の給水を注湯される湯に混合するようになっている。
【００６０】
具体的には、まず電磁弁４４を閉じ（ステップＳ５０１）、注湯連絡管５０からの水が熱交換器１３を再経由しない状態に注湯経路を設定する。次に、注湯電磁弁５１（Ｓ）、注湯水量制御弁５２（ＭＨ）および混合水量制御弁６１（ＭＬ）が開いているか否かを調べ（ステップＳ５０２）、いずれか１つでも開いていない場合には（ステップＳ５０２；Ｎ）、それを開く（ステップＳ５０３）。
【００６１】
この状態では、浴槽２００への注湯は吐出口２０２を通じてのみ行われ、その際の注湯温度は、落とし込みサーミスタ４７によって検出される。そこで、落とし込みサーミスタ４７の検出する温度（ＴＤ）が浴槽側設定温度（ＴＢ）と等しくなければ（ステップＳ５０４；Ｎ）、これらが等しくなるように注湯水量制御弁５２および混合水量制御弁６１の開度を調整する（ステップＳ５０５）。なお、注湯水量制御弁５２および混合水量制御弁６１の開度をどのように調整しても、落とし込みサーミスタ４７の検出する温度（ＴＤ）と浴槽側設定温度（ＴＢ）とが等しくならない場合には（ステップＳ５０６；Ｎ）、落とし込み動作を一時的に中断する（ステップＳ５０７）。
【００６２】
図５は、再加熱初期制御処理の流れを示している。再加熱初期制御処理は、浴槽側設定温度（ＴＢ）が給湯側設定温度（ＴＫ）より高い場合に行われ、注湯連絡管５０を通じて流れ込む水の一部を追い焚き受熱管４１を通じてさらに加熱してから浴槽２００へ落とし込むように注湯経路を設定するものである。
【００６３】
まず、電磁弁４４が開いているか否かを調べ、もともと開いている場合はそのまま、閉じている場合には電磁弁４４を開いて、注湯連絡管５０から流れ込む水の一部が熱交換器１３を再度経由して吸入口２０１からも浴槽２００内に落とし込まれるように注湯経路を設定する（ステップＳ６０１）。次に、注湯電磁弁５１、注湯水量制御弁５２が開いていなければ（ステップＳ６０２；Ｎ）、これらを開く（ステップＳ６０３）。すなわち、同時使用が開始されてから初めて初期制御処理を実行する場合であって、同時使用が開始される前の状態が給湯単独使用であったときには、まだ注湯電磁弁５１、注湯水量制御弁５２が閉じた状態にあるので、これらを開く。
【００６４】
なお、同時使用中に給湯側設定温度（ＴＫ）や浴槽側設定温度（ＴＢ）が変更された為に、再加熱初期制御処理が行われる場合には、混合水量制御弁６１が開いている可能性があるので、流れ図では示していないが、この場合には混合水量制御弁６１を一旦閉じるようになっている。
【００６５】
次に、浴槽２００に落とし込まれる湯温（ＴＷ）を演算で求める。吐出口２０２から浴槽２００に落とし込まれる湯量は注湯水量センサ４８により、またその温度は落とし込みサーミスタ４７によって検出される。一方、吸入口２０１から浴槽２００に落とし込まれる湯温は、風呂サーミスタ７３によって検出される。
【００６６】
給水温度（Ｔｉｎ）は入水サーミスタ２５によって検知され、給湯温度（出湯温度…Ｔｏｕｔ）は出湯サーミスタ２９で検出されるので、これらの温度と落とし込みサーミスタ４７の検出温度（ＴＤ）とから、注湯水量センサ４８の検出する流量（Ｑ１）のうち給水混合流路６０から供給された給水の量（Ｑ１Ｌ）と注湯連絡管５０から供給された湯の量（Ｑ１Ｈ）とがそれぞれ判明する。一方、注湯連絡管５０から供給される湯量（ＱＨ）は、水量センサ２４の検出流量（Ｑｉｎ）から出湯側水量センサ２８の検出流量（Ｑｏｕｔ）を差し引いた値として求まる。したがって、（Ｑｉｎ−Ｑｏｕｔ−Ｑ１Ｈ）を求めることで、合流箇所４５に流れ込んだ湯のうち電磁弁４４側に流れる湯量（Ｑ２Ｈ）が判明する。
【００６７】
また、入水サーミスタ２５の検出する給水温度（Ｔｉｎ）と出湯サーミスタ２９の検出する給湯温度（Ｔｏｕｔ）と風呂サーミスタ７３の検出する温度（Ｔｆ）とから吸入口２０１から落とし込まれる湯に含まれる給水と給湯との配分が分かる。この配分比と、先に求めた、合流箇所４５で分岐して電磁弁４４側に流れる湯の量（Ｑ２Ｈ）とから、吸入口２０１を通じて浴槽２００に落とし込まれる湯量（Ｑ２）を求めることができる。
【００６８】
このように、吸入口２０１、吐出口２０２それぞれから浴槽２００に落とし込まれる湯の量とそれらの温度とが求まるので、これらを用いて浴槽２００内で合流した際の湯温（ＴＷ）が演算で求まる。
【００６９】
このようにして求めた浴槽落とし込み温度（ＴＷ）が、浴槽側設定温度（ＴＢ）と等しくない場合には、これらが等しくなるように注湯水量制御弁５２および混合水量制御弁６１の開度を調整し（ステップＳ６０６）、再度、浴槽落とし込み温度（ＴＷ）を演算で求める（ステップＳ６０７）。注湯水量制御弁５２および混合水量制御弁６１の開度をどのように調整しても浴槽落とし込み温度（ＴＷ）と浴槽側設定温度（ＴＢ）とが等しくならない場合は（ステップＳ６０８；Ｎ）、注湯電磁弁５１、注湯水量制御弁５２、混合水量制御弁６１を閉じて（ステップＳ６０９）、注湯動作を中断する（ステップＳ６１０）。浴槽落とし込み温度（ＴＷ）が浴槽側設定温度（ＴＢ）と等しくなったときは、その状態で給湯と注湯の同時使用を継続する（ステップＳ６０５；Ｙ、ステップＳ６０８；Ｙ）。
【００７０】
このように、給湯側設定温度（ＴＫ）がいかなる温度であっても、浴槽２００への浴槽側設定温度（ＴＢ）での落とし込み動作を給湯動作と同時並行して実行することができるので、湯張り完了までに要する時間が短縮される。また、給湯側設定温度（ＴＫ）が浴槽側設定温度（ＴＢ）よりも低い場合には、いわゆるダブル搬送になるので、単位時間当たりの落とし込み流量を多く確保することができる。
【００７１】
さらに、給湯温度が落とし込み温度より高い場合であっても、その高い温度の湯がそのまま浴槽２００に注湯されないので、注湯動作中に入浴者があっても、その者が火傷を負ったり、高温の湯が出て不快感を覚えるようなことがない。
【００７２】
次に、本発明の第２の実施の形態について説明する。
【００７３】
第２の実施の形態では、装置構成自体は、第１の実施の形態に示したものと同様であるが、電磁弁４４、注湯電磁弁５１、注湯水量制御弁５２、混合水量制御弁６１の制御内容が異なっている。第２の実施の形態では、給湯と注湯とを同時使用するとき、電磁弁４４をできるだけ開いた状態に維持し、混合水量制御弁６１の開度、すなわち、給水の混合量によって浴槽落とし込み温度（ＴＷ）が浴槽側設定温度（ＴＢ）になるように制御する。そして、混合水量制御弁６１を全開にしても、浴槽落とし込み温度（ＴＷ）が浴槽側設定温度（ＴＢ）より高くなる場合に、初めて電磁弁４４を閉じるようになっている。
【００７４】
すなわち、給湯側設定温度（ＴＫ）が浴槽側設定温度（ＴＢ）より高い場合あるいはこれらが等しい場合であっても、電磁弁４４をとりあえず開状態に設定し、混合水量制御弁６１の開度（給水の混合量）によって、浴槽落とし込み温度（ＴＷ）が浴槽側設定温度（ＴＢ）になるよう調整を試みる。これにより浴槽落とし込み温度（ＴＷ）と浴槽側設定温度（ＴＢ）とが等しくなる場合には、電磁弁４４を開いた状態のままで同時使用を継続する。
【００７５】
一方、混合水量制御弁６１を全開にしても浴槽落とし込み温度（ＴＷ）が浴槽側設定温度（ＴＢ）より高い場合には、電磁弁４４を閉じ、この状態で浴槽落とし込み温度（ＴＷ）と浴槽側設定温度（ＴＢ）とが一致するように混合水量制御弁６１の開度を再調整する。これにより、単位時間当たりの落とし込み流量が多くなり、湯張り完了までに要する時間をより一層短縮することができる。
【００７６】
なお、電磁弁４４を一気に閉じる代わりに、注湯水量制御弁５２によって注湯連絡管５０からの湯量を徐々に絞るようにしてもよい。また、電磁弁４４は必ずしも設ける必要はない。たとえば、混合水量制御弁６１を全開にしても浴槽落とし込み温度（ＴＷ）が浴槽側設定温度（ＴＢ）より高くなる場合には、注湯動作を一時的に中断するようにしてもよい。また注湯水量制御弁５２によって給湯側からの湯量を絞ることができれば、電磁弁４４を敢えて設ける必要はない。
【００７７】
以上説明した各実施の形態では、注湯連絡管５０から追い焚き用循環流路４０に流れ込む湯のうちの一部が電磁弁４４側に流れるように構成したが、たとえば、合流箇所４５と給水合流箇所４６の間に、配管を閉状態と開状態とに切り換えるための電磁弁を設け、これを閉状態にして電磁弁４４を開くことで、注湯連絡管５０からの湯を全て電磁弁４４側に流すようにしてもよい。これにより、給湯側設定温度（ＴＫ）が浴槽側設定温度（ＴＢ）よりもかなり低い場合であっても、浴槽２００への落とし込み温度を浴槽側設定温度（ＴＢ）まで高めることが可能になる。
【００７８】
また電磁弁４４と直列に水量制御弁を配置し、再加熱される湯量のみを単独で調整し得るように構成してもよい。
【００７９】
各実施の形態では、熱交換器１３を再度経由させないために電磁弁４４を閉じるようにしたが、図６に示すように、電磁弁４４に代えて三方弁１５０を配置し、熱交換器１３を迂回するためのバイパス路１５１を、三方弁１５０の一の接続口と、追い焚き戻り管４２の所定箇所との間に設ける構成としてもよい。熱交換器１３を再経由させる場合には、三方弁１５０を矢印１５２で示すように連通させ、熱交換器１３を迂回させるときには三方弁１５０を矢印１５３で示すように連通させる。このようにすれば、熱交換器１３を迂回させて再加熱を回避する場合であっても、吸入口２０１と吐出口２０２の双方から浴槽２００内に湯を落とし込むことができるので（ダブル搬送状態になる）、湯張り完了までに要する時間を短縮することができる。
【００８０】
なお、実施の形態では、注湯電磁弁５１や混合水量制御弁６１の開度を調整しても、浴槽側設定温度（ＴＢ）と一致した温度で落とし込みができないときに、落とし込み動作を中断するようにしたが、温度が一致しない状態のままで落とし込み動作を継続し、落とし込み完了後などに所定の後処理を行って浴槽２００内の湯温を調整するようにしてもよい。
【００８１】
具体的には、落とし込み中に何度の湯が何リットル注湯されたかを常に計測してこれを記憶しておき、同時使用が終了した後や所定の水位まで注湯した後に、低温度の水を注湯したり、追い焚きを行う等の後処理を行うことで浴槽２００内の湯温を浴槽側設定温度（ＴＢ）と一致させる。このように、落とし込み動作を中断しない場合であっても、注湯と給湯との同時使用中に浴槽２００内に落とし込まれる湯の温度を浴槽側設定温度（ＴＢ）にできるだけ近づけるように制御しているので、後処理での温度補正量が少なく、湯張り完了までに要する時間は、従来のものに比べて短縮されることになる。
【００８２】
【発明の効果】
本発明にかかる一缶多水路型給湯風呂釜によれば、給湯と注湯とが同時使用されかつ給湯側設定温度が浴槽側設定温度より低いときだけ注湯連絡管から流れ込んだ水を熱交換器で再加熱し、給湯側設定温度が浴槽側設定温度より低くないときには注湯連絡管から流れ込んだ水を熱交換器で再加熱しないようにするとともに必要に応じて給水を混合するようにしたので、どのような設定温度で給湯側が使用されても、浴槽側設定温度に近い温度あるいは一致した温度で、注湯動作を継続することができ、湯張り完了までに要する時間を短縮することができる。
【００８３】
また、給水の混合量を調整することによって浴槽への注湯温度を浴槽側設定温度に一致させることができる間は再加熱状態を維持しておき、給水の混合量を最大にしても注湯温度が浴槽側設定温度より高くなるときだけ、非再加熱状態を形成するようにしたものでは、できるだけ熱交換器での再加熱を行うようにしているので、単位時間当たりの注湯流量が増加し、湯張り時間をより一層短縮することができる。
【図面の簡単な説明】
【図１】本発明の第１および第２の実施の形態に係る一缶多水路型給湯風呂釜の構成を示す説明図である。
【図２】本発明の第１の実施の形態に係る一缶多水路型給湯風呂釜の行う動作の流れを示す流れ図である。
【図３】本発明の第１の実施の形態に係る一缶多水路型給湯風呂釜の行う等温度初期制御処理を示す流れ図である。
【図４】本発明の第１の実施の形態に係る一缶多水路型給湯風呂釜の行う非再加熱初期制御処理を示す流れ図である。
【図５】本発明の第１の実施の形態に係る一缶多水路型給湯風呂釜の行う再加熱初期制御処理を示す流れ図である。
【図６】熱交換器を迂回するバイパス路を設けた一缶多水路型給湯風呂釜の構成を示す説明図である。
【符号の説明】
１０…一缶多水路型給湯風呂釜
１２…バーナ
１３…熱交換器
２０…給湯流路
２１…給湯系受熱管
２２…給水管
２３…給湯管
２４…水量センサ
２５…入水サーミスタ
２８…出湯側水量センサ
２９…出湯サーミスタ
４０…追い焚き用循環流路
４１…追い焚き受熱管
４２…追い焚き戻り管
４３…追い焚き往き管
４４…電磁弁
４５…合流箇所
４６…給水合流箇所
４７…落とし込みサーミスタ
４８…注湯水量センサ
４９…圧力センサ
５０…注湯連絡管
５１…注湯電磁弁
５２…注湯水量制御弁
６０…給水混合流路
６１…混合水量制御弁
６２…逆止弁
７１…循環ポンプ
７３…風呂サーミスタ
１００…制御部
１１１…設定温度比較手段
１１２…注湯経路切替制御手段
１１３…注湯流量制御手段
１１４…混合流量制御手段
１５０…三方弁
１５１…バイパス路
２００…浴槽
２０１…吸入口
２０２…吐出口[0001]
BACKGROUND OF THE INVENTION
The present invention is based on a common heat exchanger in which a recirculation flow path connecting a suction port and a discharge port provided in a bathtub and a hot water flow channel for passing water supply are heated by a predetermined heating device. One can multi-water channel type hot water bath, which is branched from the hot water flow channel at a predetermined location on the outlet side of the heat exchanger, and has a predetermined portion other than the portion passing through the heat exchanger to the recirculation flow channel A hot water connecting pipe that joins at a location, and a hot water that is switched between whether or not the water in the hot water supply flow path that is provided in the middle of the pouring hot water supply pipe flows to the recirculation circulation flow path side through the hot water supply connecting pipe A switching valve, and when performing the pouring operation and the hot water supply operation of pouring hot water heated in the hot water supply channel into the bathtub through the pouring communication pipe and the recirculation circulation channel, The present invention relates to an apparatus in which the heating amount is controlled based on the temperature on the hot water supply side.
[0002]
[Prior art]
Conventionally used canned multi-channel hot water hot water baths are used to introduce the water heated at the hot water supply channel side to the tap, and the water heated at the hot water flow channel side is equipped with a solenoid valve, etc. It is possible to pour hot water into the bathtub by pouring it into the recirculation flow passage side through the connecting pipe.
[0003]
The water fed into the recirculation circulation channel from the hot water supply channel side through the hot water supply pipe is usually double-conveyed and poured into the bathtub. That is, the water sent from the hot water supply channel side into the recirculation circulation channel flows into the bathtub again through the heat exchanger and flows into the bathtub without passing through the heat exchanger again. It was split into two parts and dropped into the bathtub. Of the water divided in this way, the water that passes through the heat exchanger again is reheated here, so that it becomes a temperature higher than the hot water temperature after heating on the hot water supply channel side and drops into the bathtub. It was rare.
[0004]
Japanese Patent Application Laid-Open No. 8-233363 discloses a hot water supply apparatus configured such that water flowing into the recirculation circulation channel from the hot water supply pipe is dropped into the bathtub again without going through the heat exchanger. Has been. In this device, a three-way valve is provided at a location where the pouring communication pipe joins the recirculation circulation passage, and the recirculation circulation passage is connected to the side through the heat exchanger and through the heat exchanger without using the three-way valve as a boundary. It is divided into the side.
[0005]
When reheating, a circulation path is formed by connecting the recirculation flow path side through the heat exchanger and the non-heat exchanger side, and at the time of pouring, the pouring communication pipe and the non-heat exchanger side are connected. The three-way valve is switched to communicate with each other. As a result, the poured water flows into the bathtub only through the non-heat exchanger side (so-called single conveyance), so that the dropping temperature can be easily controlled.
[0006]
[Problems to be solved by the invention]
By the way, if the hot water supply side is used at the same time during the pouring operation in a single can multi-channel hot water bath, the heating amount of the burner is normally controlled with priority on hot water supply. Even so, the pouring temperature could not be maintained at the set temperature on the bathtub side.
[0007]
For this reason, it is conceivable to prevent the pouring temperature from deviating from the set temperature on the bathtub side by interrupting the pouring operation while the hot water supply operation is being performed. Since the hot water operation is interrupted, there is a problem that it takes time to complete the hot water filling.
[0008]
On the other hand, when the pouring operation is continued while the hot water supply operation is being performed, it is necessary to perform post-processing in order to make the hot water temperature in the bathtub coincide with the set temperature on the bathtub side at the final stage of the pouring operation, etc. was there. That is, if the hot water supply side set temperature is lower than the bathtub side set temperature, it is necessary to reheat to the bathtub side set temperature after the dropping operation to the bathtub is completed, and conversely, the hot water supply side set temperature is set to the bathtub side set temperature. If it was higher than the temperature, it was necessary to drop the low-temperature hot water into the bathtub to fill it. Therefore, when the hot water supply operation is performed simultaneously during the pouring operation, it takes a long time until bathing becomes possible by the amount of such post-processing. Moreover, when dropping low temperature hot water again, there was also a problem of causing low temperature corrosion of the heat exchanger.
[0009]
The present invention has been made paying attention to such problems of the conventional technology, and even when the hot water supply side is used simultaneously during pouring, the pouring temperature can be maintained at the set temperature on the bathtub side, An object of the present invention is to provide a one-can multi-channel hot water bath that can complete a hot water filling operation in time.
[0010]
[Means for Solving the Problems]
The gist of the present invention for achieving the object lies in the inventions of the following items.
[1] A recirculation channel (40) for reheating connecting the suction port (201) and the discharge port (202) provided in the bathtub (200) and a hot water supply channel (20) for passing water supply are predetermined. A canned multi-channel hot-water hot water bath through a common heat exchanger (13) heated by the heating device (12) of the hot water supply channel (20), A pouring communication pipe (50) that branches at a predetermined position on the side and joins the recirculation circulation channel (40) at a predetermined position other than a portion that passes through the heat exchanger (13), and the pouring communication pipe (50) A hot water supply switching valve for switching whether or not the water in the hot water supply flow channel (20) flows to the recirculation circulation flow channel (40) side through the hot water connection pipe (50). (51), and the hot water heated in the hot water supply channel (20) is supplied to the pouring pipe (50) and the additional hot water. The heating amount of the heating device (12) is controlled based on the temperature of the hot water supply side when simultaneously performing the pouring operation and the hot water supply operation flowing into the bathtub (200) through the circulation flow path (40) for watering ,
A pouring route switching means (44), a pouring route switching control means (112), and a set temperature comparison means (111);
The set temperature comparison means (111) compares the bathtub side set temperature with the hot water supply side set temperature,
In the pouring route switching means (44), a part or all of the water that has flowed into the recirculation circulation channel (40) through the pouring communication pipe (50) again passes through the heat exchanger (13). All of the water that has flowed into the recirculation flow path (40) through the reheating state flowing into the bathtub (200) and the pouring communication pipe (50) through the heat exchanger (13) again. The route state during pouring is switched to a non-reheated state that flows into the bathtub (200) without going through,
The pouring route switching control means (112) performs the pouring so that the reheating state is formed when the hot water supply operation and the pouring operation are performed simultaneously and the hot water supply side set temperature is lower than the bathtub side set temperature. The hot water path switching means (44) is set so that when the hot water supply operation and the pouring operation are performed simultaneously and the hot water supply side set temperature is equal to or higher than the bathtub side set temperature, the non-reheating state is formed. A canned multi-channel hot-water supply hot water bath is provided for setting the pouring route switching means (44).
[0011]
[2] A recirculation flow path (40) for connecting the suction port (201) and the discharge port (202) provided in the bathtub (200) and a hot water supply flow path (20) for passing water supply are predetermined. A canned multi-channel hot-water supply hot water bath via a common heat exchanger (13) heated by the heating device (12) of the hot water supply device (12), wherein the heat exchanger (13) exits from the hot-water supply channel (20). A pouring communication pipe (50) that branches at a predetermined position on the side and joins the recirculation circulation channel (40) at a predetermined position other than a portion that passes through the heat exchanger (13), and the pouring communication pipe (50) A hot water supply switching valve for switching whether or not the water in the hot water supply flow channel (20) flows to the recirculation circulation flow channel (40) side through the hot water connection pipe (50). (51), and the hot water heated in the hot water supply channel (20) is supplied to the pouring pipe (50) and the additional hot water. The heating amount of the heating device (12) is controlled based on the temperature of the hot water supply side when simultaneously performing the pouring operation and the hot water supply operation flowing into the bathtub (200) through the circulation flow path (40) for watering ,
A pouring route switching means (44), a pouring route switching control means (112), a set temperature comparison means (111), a feed water mixing channel (60), a mixing amount adjusting valve (61), and a mixing amount Control means (114),
The set temperature comparison means (111) compares the bathtub side set temperature with the hot water supply side set temperature,
In the pouring route switching means (44), a part or all of the water that has flowed into the recirculation circulation channel (40) through the pouring communication pipe (50) again passes through the heat exchanger (13). All of the water that has flowed into the recirculation flow path (40) through the reheating state flowing into the bathtub (200) and the pouring communication pipe (50) through the heat exchanger (13) again. The route state during pouring is switched to a non-reheated state that flows into the bathtub (200) without going through,
The pouring route switching control means (112) performs the pouring so that the reheating state is formed when the hot water supply operation and the pouring operation are performed simultaneously and the hot water supply side set temperature is lower than the bathtub side set temperature. The hot water path switching means (44) is set so that when the hot water supply operation and the pouring operation are performed simultaneously and the hot water supply side set temperature is equal to or higher than the bathtub side set temperature, the non-reheating state is formed. The pouring route switching means (44) is set,
The water supply mixing channel (60) branches from the hot water supply channel (20) at a predetermined location on the entrance side of the heat exchanger (13) and joins the recirculation circulation channel (40) at a predetermined location. And
The mixing amount adjusting valve (61) adjusts the flow rate of the feed water flowing into the recirculation circulation channel (40) through the feed water mixing channel (60),
The mixing amount control means (114) is a pouring temperature to the bathtub (200) when the hot water supply operation and the pouring operation are performed simultaneously and the mixing amount adjustment valve (61) is closed. When the water temperature is higher than the set temperature on the bathtub side, the mixing amount adjusting valve (61) is opened to feed the feed water from the feed water mixing channel (60) to the recirculation circulation channel (40). One can multi-water channel hot water bath.
[0012]
[3] A recirculation flow path (40) for connecting the suction port (201) and the discharge port (202) provided in the bathtub (200) and a hot water supply flow path (20) for passing water supply are predetermined. A canned multi-channel hot-water hot water bath through a common heat exchanger (13) heated by the heating device (12) of the hot water supply channel (20), A pouring communication pipe (50) that branches at a predetermined position on the side and joins the recirculation circulation channel (40) at a predetermined position other than a portion that passes through the heat exchanger (13), and the pouring communication pipe (50) A hot water supply switching valve for switching whether or not the water in the hot water supply flow channel (20) flows to the recirculation circulation flow channel (40) side through the hot water connection pipe (50). (51), and the hot water heated in the hot water supply channel (20) is supplied to the pouring pipe (50) and the additional hot water. The heating amount of the heating device (12) is controlled based on the temperature of the hot water supply side when simultaneously performing the pouring operation and the hot water supply operation flowing into the bathtub (200) through the circulation flow path (40) for watering ,
A pouring route switching means (44), a pouring route switching control means (112), a feed water mixing channel (60), a mixing amount adjusting valve (61), and a mixing amount control means (114) are provided.
In the pouring route switching means (44), a part or all of the water that has flowed into the recirculation circulation channel (40) through the pouring communication pipe (50) again passes through the heat exchanger (13). All of the water that has flowed into the recirculation flow path (40) through the reheating state flowing into the bathtub (200) and the pouring communication pipe (50) through the heat exchanger (13) again. The route state during pouring is switched to a non-reheated state that flows into the bathtub (200) without going through,
The water supply mixing channel (60) branches from the hot water supply channel (20) at a predetermined location on the entrance side of the heat exchanger (13) and joins the recirculation circulation channel (40) at a predetermined location. And
The mixing amount adjusting valve (61) adjusts the flow rate of the feed water flowing into the recirculation circulation channel (40) through the feed water mixing channel (60),
When the hot water supply operation and the pouring operation are performed simultaneously, the mixing amount control means (114) is configured to adjust the mixing amount adjustment valve (so that the pouring temperature to the bathtub (200) becomes the bathtub set temperature. 61) opening degree is controlled,
The pouring route switching control means (112) sets the pouring route switching means (44) so that the reheating state is always formed, and the hot water supply operation and the pouring operation are performed simultaneously. Even when the mixing amount adjusting valve (61) is fully opened, the non-reheated state is formed when the temperature of pouring water into the bathtub (200) becomes higher than the set temperature on the bathtub side. The canned multi-water channel hot water bath is characterized in that the pouring route switching means (44) is set in the can.
[0013]
[4] The pouring path switching means (44) is a switching valve (44) for switching between opening and closing the flow path, and the pouring communication pipe (50) is the recirculation circulation flow path. The recirculation flow path for reheating (40) is divided into a heat exchanger passing side and a heat exchanger non-passing side at the place where it joins (40), and is attached to the piping portion on the heat exchanger passing side. [1], [2] or [3] is a one-can multi-channel hot-water hot water bath.
[0015]
[ 5 ] The amount of water on the side flowing into the bathtub (200) through at least the heat exchanger (13) again out of the water flowing into the recirculation circulation channel (40) through the pouring communication pipe (50) [1], [2], [3], characterized by comprising water amount adjusting means (52) for adjusting Or [4] One can multi-waterway hot water bath.
[0016]
The present invention operates as follows.
The pouring route switching means (44) is configured such that part or all of the water that has flowed into the recirculation circulation passage (40) through the pouring communication pipe (50) passes through the heat exchanger (13) again. The reheated state flowing into (200) and the entire water flowing into the recirculation circulation passage (40) through the pouring communication pipe (50) without passing through the heat exchanger (13) again (200 ) Is switched to the non-reheated state flowing into the molten metal.
[0017]
For example, the pouring path switching means (44) is a switching valve (44) that switches between opening and closing the flow path, and the pouring communication pipe (50) is used as the recirculation circulation path (40). The recirculation circulation flow path (40) is divided into the side through the heat exchanger and the non-passage side of the heat exchanger, and is configured to be attached to the pipe portion through the heat exchanger. A reheating state is formed by opening the switching valve (44), and a non-reheating state is formed by closing the switching valve (44).
[0018]
The pouring route switching means (44) exchanges heat between the bypass passage for bypassing the heat exchanger (13) and the water flowing into the recirculation flow passage (40) from the pouring connecting pipe (50). You may comprise from the switching valve (44) which switches whether it flows to an oven (13) side or it flows to the previous bypass path side, and makes a heat exchanger (13) bypass.
[0019]
The set temperature comparison means (111) compares the bathtub side set temperature and the hot water supply side set temperature, and the pouring path switching control means (112) performs the hot water supply operation and the pouring operation simultaneously and the hot water supply side set temperature. When the temperature is lower than the set temperature on the bathtub side, the pouring route switching means (44) is set so that a reheating state is formed. Further, when the hot water supply operation and the pouring operation are performed simultaneously and the hot water supply side set temperature is equal to or higher than the bathtub side set temperature, the pouring route switching means (44) is set so that a non-reheating state is formed. .
[0020]
Thus, when the hot water supply side set temperature is lower than the bathtub side set temperature during simultaneous use of hot water and pouring, a part of the water that has flowed into the recirculation circulation channel (40) from the pouring communication pipe (50) Alternatively, when the whole is reheated by the heat exchanger (13) and reaches the bathtub (200), and the hot water supply side set temperature is not lower than the bathtub side set temperature, it is not reheated by the heat exchanger (13). It will flow into the bathtub (200).
[0021]
Thus, only when hot water and hot water are used at the same time and the hot water supply side set temperature is lower than the bathtub side set temperature, the water flowing from the hot water communication pipe (50) is reheated by the heat exchanger (13), When the hot water supply side set temperature is not lower than the bathtub side set temperature, the pouring route is switched so that water flowing from the pouring communication pipe (50) is not reheated by the heat exchanger (13). Even if the hot water supply side is used at the same time, the pouring operation can be continued at a temperature close to or coincident with the bathtub side set temperature, and the time required for completion of the hot water filling can be shortened.
[0022]
Moreover, in what comprises the water quantity adjustment means (52) which controls the flow volume of the water which passes through a heat exchanger (13) again, for example, the water reheated according to the difference of hot water supply side preset temperature and bathtub side preset temperature The flow rate can be adjusted to an appropriate value.
[0023]
Mixing amount control for controlling the opening of the mixing amount adjusting valve (61), the mixing amount adjusting valve (61) for adjusting the flow rate in the supplying water mixing channel (60), and the mixing amount adjusting valve (61) In the apparatus further provided with the means (114), when the hot water supply and the hot water are used at the same time and the mixing amount adjusting valve (61) is closed, the temperature of the hot water supplied to the bathtub (200) is set to the set temperature on the bathtub side. When it becomes higher, the mixing amount adjusting valve (61) is opened to feed the feed water from the feed water mixing channel (60) to the recirculation circulation channel (40).
[0024]
Thus, when the hot water supply temperature to the bathtub (200) becomes higher than the bathtub side set temperature, such as when the hot water supply side set temperature is higher than the bathtub side set temperature, the water before heating is supplied from the water supply mixing channel (60). Since it mixes, even if the hot water supply side is used simultaneously at high temperature, it can be filled with hot water in the bathtub (200) at an appropriate temperature. When the hot water supply set temperature is lower than the bathtub side set temperature, a reheating state is formed and reheating is performed in the heat exchanger (13). As a result of this reheating, the pouring temperature is set to the bathtub side. Even in the case where the temperature exceeds the preset temperature, hot water can be poured at an appropriate temperature by mixing the feed water from the feed water mixing channel (60). Of course, the flow rate on the reheated side may be adjusted by the water amount adjusting means (52), or the pouring temperature may be adjusted to the set temperature on the bathtub side by adjusting both the mixing amount of the feed water and the reheating flow rate. You may control to.
[0025]
In addition, when the hot water supply operation and the pouring operation are performed simultaneously, a reheat state is formed as much as possible, and the bath (200) is moved to the bathtub (200) by the degree of opening of the mixing amount adjusting valve (61) (mixed amount of water supply). The hot water pouring temperature is controlled to coincide with the set temperature on the bathtub side. And even if the mixing amount adjusting valve (61) is fully opened, only when the temperature of pouring water into the bathtub (200) becomes higher than the set temperature on the bathtub side, the pouring route switching means ( 44) is set.
[0026]
Thus, since reheating with a heat exchanger (13) is performed while it can be adjusted with the mixing amount of feed water, the pouring flow rate per unit time increases and the hot water filling time can be further shortened. . Even if the mixing amount adjusting valve (61) is fully opened, when the pouring temperature exceeds the set temperature on the bathtub side, the mixture amount adjusting valve (61) is opened as much as possible without shifting to the non-reheating state at once. Thus, the flow rate to the reheating side may be gradually limited by the water amount control means (52).
[0027]
In addition, a state in which a part of the water flowing into the recirculation circulation channel (40) through the pouring communication pipe (50) flows into the bathtub (200) again through the heat exchanger (13) is always formed. In addition, the pouring temperature may be brought close to the bathtub side set temperature only by increasing or decreasing the mixing amount of the water supply.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, various embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows the configuration of a single can multi-channel hot water hot water bath 10 according to the first embodiment of the present invention. The canned multi-channel hot water bath 10 has a hot water supply operation for supplying hot water to a predetermined faucet, a reheating operation for replenishing hot water in the bathtub 200, and a pouring operation for pouring hot water heated on the hot water supply side into the bathtub 200. It has a function to perform each operation.
[0029]
As shown in FIG. 1, a single can multi-channel hot water bath 10 includes a combustion chamber 11. A burner 12 is provided at the lower portion of the combustion chamber 11, and a burner 12 is provided at the upper portion of the combustion chamber 11. The heat exchangers 13 for transferring the heat to the water supply or the like are respectively arranged. The heat exchanger 13 has both a hot water supply channel 20 for flowing water and a recirculation channel 40 for circulating water in the bathtub 200 for reheating. Is a so-called one-can two-water channel type in which the heat from the burner 12 is transferred to the fluid in both of the flow paths and heated.
[0030]
The hot water supply flow path 20 is connected to the hot water supply heat receiving pipe 21 that is a pipe portion that receives heat from the fin plate of the heat exchanger 13, and one end is connected to the inlet side of the hot water supply heat receiving pipe 21, and the other end is connected to the water supply source. A water supply pipe 22 and a hot water supply pipe 23 extending from the outlet side of the hot water supply system heat receiving pipe 21 are configured. A water amount sensor 24 for detecting the amount of water flow is provided in the middle of the water supply pipe 22, and a water inlet thermistor 25 for detecting the temperature of the supplied water is provided in the vicinity of the inlet of the appliance 10 in the water supply pipe 22. is there.
[0031]
A heat exchange thermistor 26 for detecting the water temperature after being heated by the hot water supply heat receiving pipe 21 is disposed in the vicinity of the outlet side of the hot water supply heat receiving pipe 21 in the hot water supply pipe 23. In addition, a first water amount control valve 27 for adjusting the amount of hot water discharged through the hot water supply passage 20 is provided at a predetermined location downstream of the heat exchanger thermistor 26 in the hot water supply pipe 23, and a hot water supply confirmation is provided downstream thereof. Further, a hot water side water amount sensor 28 for detecting the hot water flow rate on the hot water supply side is attached.
[0032]
The heat exchanger 13 is diverted between the vicinity of the inlet side to the heat exchanger 13 in the water supply pipe 22 and the predetermined part between the heat exchange thermistor 26 and the first water amount control valve 27 in the hot water supply pipe 23. Thus, a fixed bypass 30 is provided for flowing water from the water supply pipe 22 directly into the hot water supply pipe 23. In addition, between a predetermined portion of the water supply pipe 22 on the water supply side (upstream side) of the water amount sensor 24 and a predetermined portion of the hot water supply pipe 23 between the first water amount control valve 27 and the hot water side water amount sensor 28. A variable bypass path 31 is provided for bypassing the heat exchanger 13 and flowing water from the water supply pipe 22 into the hot water supply pipe 23. A second water amount control valve 32 for adjusting the amount of water flowing into the hot water supply pipe 23 is attached in the middle of the variable bypass passage 31. Further, a hot water thermistor 29 for detecting the hot water temperature is disposed at a location closer to the hot water side water amount sensor 28 than the location where the variable bypass passage 31 joins.
[0033]
The recirculation circulation channel 40 includes a reheating heat receiving pipe 41 that is a pipe portion that receives heat from the fin plate of the heat exchanger 13, a heat exchanger inlet side of the reheating heat receiving pipe 41, and an inlet 201 provided in the bathtub 200. A recirculation return pipe 42 that connects to the heat exchanger 41, and a recirculation pipe 43 that connects between the outlet side of the heat exchanger 41 and the discharge port 202 provided in the bathtub 200. .
[0034]
An electromagnetic valve 44 for switching whether the flow path is closed or opened is provided in the middle of the follow-up pipe 43. Further, the pouring communication pipe 50 branched from the branching point between the hot water thermistor 29 and the hot water side water amount sensor 28 joins the recirculation pipe 43 at the joining point 45 slightly closer to the discharge port 202 than the solenoid valve 44. is doing. The recirculation flow path 40 for reheating with the junction 45 is a boundary between the heat exchanger non-passing side extending to the discharge port 202 side and the heat exchanger passing through the heat exchanger 13 to the suction port 201 again. It will be divided into two.
[0035]
In the middle of the pouring communication pipe 50, there is a pouring electromagnetic valve 51 for switching whether the pouring communication pipe 50 is closed or opened, and a closing function for adjusting the flow rate in the pouring communication pipe 50. A pouring water amount control valve 52 is provided. By opening the pouring solenoid valve 51, the hot water heated by the hot water supply system heat receiving pipe 21 flows into the recirculation circulation path 40 from the junction 45 through the pouring communication pipe 50, and the recirculation circulation path 40. It is possible to pour hot water into the bathtub 200 through. The pouring solenoid valve 51 may not have a closing function.
[0036]
A feed water mixing channel 60 is branched from a predetermined point between the branch point of the variable bypass path 31 and the water amount sensor 24 in the feed water pipe 22, and the feed water mixing channel 60 discharges from the junction 45. At the water supply confluence 46 near the exit 202, the water flows into the follow-up pipe 43. A mixed water amount control valve 61 with a closing function for adjusting the amount of water flow in the pipe is provided in the middle of the water supply and mixing channel 60. Further, a check valve 62 for preventing a back flow from the water supply / merging point 46 side toward the water / mixing flow channel 60 side is attached closer to the water supply / merging point 46 than the mixed water amount control valve 61.
[0037]
A drop-off thermistor 47 for detecting the temperature of hot water in the pipe and a quantity of hot water poured from the discharge port 202 are further closer to the discharge port 202 than the water supply / merging point 46 in the recirculation pipe 43. A pouring water amount sensor 48 is provided. A pressure sensor 49 for detecting the water level in the bathtub 200 is disposed at a predetermined location closer to the discharge port 202 than the pouring water amount sensor 48 in the reheating pipe 43.
[0038]
In the middle of the recirculation return pipe 42, a circulation pump 71 for forcibly circulating hot water in the bathtub 200 through the recirculation circulation passage 40, and the presence or absence of water flow in the recirculation return pipe 42 are detected. Bath water switch 72 is provided. A bath thermistor 73 for detecting the temperature in the pipe, that is, the temperature of the water in the bathtub flowing from the suction port 201 by driving the circulation pump 71 is attached in the vicinity of the bath running water switch 72.
[0039]
The supply / exhaust is forcibly performed by blowing the supply air from the lower side of the combustion chamber 11 by the combustion fan 14, and the exhaust is discharged from the upper part of the combustion chamber 11. An ignition device (not shown) is provided in the vicinity of the burner 12. The combustion gas supplied to the burner 12 is on / off controlled by the gas solenoid valve 16, the original gas solenoid valve 17, and the gas switching valve 18. Further, the amount of combustion gas supplied to the burner 12 is adjusted by a gas proportional valve 19.
[0040]
The single can multi-channel hot water bath 10 includes a control unit 100 for controlling various operations such as a hot water supply operation, a pouring operation, and a chasing operation. The control unit 100 includes a solenoid valve 44, a pouring solenoid valve 51, a pouring water amount control valve 52, a mixed water amount control valve 61, a water amount sensor 24 for detecting the amount of water flow, a tapping water amount sensor 28, and a pouring water amount sensor. 48, various thermistors 25, 26, 47, 73, circulation pump 71, pressure sensor 49, various control parts and sensors such as an ignition device for controlling combustion of the burner 12, a gas electromagnetic valve, and a proportional valve are simply illustrated. The wiring 101 is electrically connected. The control unit 100 is connected to a remote controller (not shown) for accepting settings such as a hot water supply side set temperature and a bathtub side set temperature, a bath reheating operation, and a pouring operation start instruction. This remote control is installed in a bathroom or the like.
[0041]
The control unit 100 includes a set temperature comparison unit 111 that compares the set temperature on the hot water supply side set with the remote controller and the set temperature on the bathtub side, a pouring route switching control unit 112 that controls opening and closing of the solenoid valve 44, Each function of the pouring flow rate control means 113 for controlling the opening degree of the hot water amount control valve 52 and the mixed flow rate control means 114 for controlling the opening degree of the mixed water amount control valve 61 is provided. The control unit 100 includes a CPU (central processing unit), a circuit mainly including a ROM (read only memory) and a RAM (random access memory).
[0042]
Next, the operation will be described.
When performing the pouring operation, the pouring solenoid valve 51 is opened, and the heated water flows from the hot water supply channel 20 side through the pouring communication pipe 50 to the recirculation circulation channel 40 side. At this time, if the electromagnetic valve 44 is set in an open state, water flowing into the junction 45 through the pouring communication pipe 50 flows toward the discharge port 202 side, and is sucked through the heat exchanger 13 again. Although it flows to the mouth 201 side, it is divided into two hands and dropped into the bathtub 200. That is, by opening the electromagnetic valve 44, the pouring path is reheated through the heat exchanger, and so-called double conveyance is performed.
[0043]
On the other hand, if the solenoid valve 44 is closed, the water that has flowed into the junction 45 through the pouring communication pipe 50 flows only toward the discharge port 202 side, and passes through the heat exchanger 13 to the suction port 201 side. It does not flow toward. That is, by closing the solenoid valve 44, the pouring path is brought into a non-reheating state in which water flows only on the non-passage side of the heat exchanger, and so-called single conveyance is performed.
[0044]
FIG. 2 shows a flow of operations performed by the single can multi-channel hot water bath 10. In the initial state, it is assumed that the electromagnetic valve 44 is open. While the hot water supply operation is being performed independently (steps S301; Y, S303; N, S304; N), the combustion amount of the burner 12 is set so that hot water having a temperature corresponding to the hot water supply side set temperature is discharged. Hot water supply control to be adjusted (step S302) is performed.
[0045]
On the other hand, while the pouring operation is being performed alone (steps S301; N, S305; Y, S307; N, S308; N), hot water having a temperature corresponding to the set temperature on the bathtub side is poured into the bathtub 200. The drop control (step S306) for adjusting the combustion amount of the burner 12 and the like is executed. When the pouring operation is finished (step S308; Y), the solenoid valve 44 (V) is opened (steps S309; N, S310), the pouring solenoid valve 51 (S), and the pouring water amount control valve 52 (MH). Then, a process of closing the mixed water amount control valve 61 (ML) is performed (step S311).
[0046]
When the pouring operation is started during hot water supply (step S303; Y) and when the hot water supply operation is started during pouring (step S307; Y), the processing proceeds to the following. During simultaneous use of hot water supply and pouring hot water, the combustion amount of the burner 12 is controlled based on the temperature on the hot water supply side, that is, priority is given to hot water supply.
[0047]
The presence or absence of a pouring operation is identified by an internal flag or the like, and the presence or absence of a hot water supply operation is determined by whether or not the hot water side water amount sensor 28 and the water amount sensor 24 detect water flow. That is, when both the water amount sensor 24 and the hot water side water amount sensor 28 detect water flow, either hot water supply alone or simultaneous use of pouring and hot water supply is used, and the state of the internal flag is matched. Thus, it is determined whether hot water is used alone or hot water is poured simultaneously.
[0048]
On the other hand, in the case of using the pouring alone, the water amount sensor 24 detects water flow, but the hot water side water amount sensor 28 does not detect water flow. Therefore, for example, the fact that the hot water supply operation has started during the single pouring operation is recognized by the fact that the hot water side water amount sensor 28 has started to detect water flow.
[0049]
When simultaneous use of the hot water supply operation and the pouring operation is started, first, the set temperature comparison means 111 compares the hot water supply side set temperature (TK) with the bathtub side set temperature (TB). When the hot water supply side set temperature (TK) is lower than the bathtub side set temperature (TB) (step S312; N), it is determined whether the simultaneous flag is on or off (step S316), and when the simultaneous flag is off ( Step S316; Y), reheating initial control processing (Step S317) is executed.
[0050]
When the hot water supply side set temperature (TK) is equal to the bathtub side set temperature (TB) (step S312; Y, S313; Y), it is determined whether the simultaneous flag is on or off (step S314), and the simultaneous flag is off. (Step S314; Y), an isothermal initial control process (step S315) described later is executed.
[0051]
When the hot water supply side set temperature (TK) is higher than the bathtub side set temperature (TB) (step S312; Y, S313; N), it is determined whether the simultaneous flag is on or off (step S318), and the simultaneous flag is off. (Step S318; Y), non-reheating initial control processing (Step S319) described later is executed. The simultaneous flag is an internal flag for indicating whether or not the initial control process corresponding to the comparison result between the hot water supply side set temperature (TK) and the bathtub side set temperature (TB) has already been executed.
[0052]
While the simultaneous use of hot water supply and pouring continues (step S320; N, S321; N), the simultaneous flag is turned on (step S322). Subsequently, it is determined whether or not the hot water supply side set temperature (TK) or the bathtub side set temperature (TB) has been changed (step S323). When at least one set temperature is changed (step S323; N), the simultaneous flag is turned off (step S324), and then the hot water supply side set temperature (TK) and the bathtub side set temperature (TB) are compared. Return to (Step S312). On the other hand, when neither the hot water supply side set temperature (TK) nor the bathtub side set temperature (TB) has been changed, the process returns to step S312 with the simultaneous flag kept on.
[0053]
The reheating initial control process is performed only when the simultaneous use of hot water and pouring is started by the above-described process and when the hot water supply side set temperature (TK) or the bathtub side set temperature (TB) is changed during the simultaneous use. Then, any one of the isothermal initial control process and the non-reheating initial control process is executed. In these initial control processes, even when hot water supply and pouring are used at the same time, combustion control of the burner 12 is performed in a state where priority is given to hot water supply, so that the dropping temperature into the bathtub 200 is the bathtub side set temperature (TB). In accordance with the comparison result between the hot water supply side set temperature (TK) and the bathtub side set temperature (TB) so that the open / close state of the electromagnetic valve 44, the pouring electromagnetic valve 51, and the pouring water amount control valve 52 Is used to control the degree of opening and the like.
[0054]
If the pouring operation is terminated first during simultaneous use of pouring and hot water supply (step S320; Y), the simultaneous flag is turned off (step S326), and the solenoid valve 44 (V) is opened. (Step S327; N, S328), the pouring electromagnetic valve 51 (S), the pouring water amount control valve 52 (MH), and the mixed water amount control valve 61 (ML) are each closed (step S329). Thereafter, since the hot water supply operation is still continued, the process returns to step S303 and the hot water supply control (step S302) is executed.
[0055]
On the other hand, when the hot water supply operation is finished first (step S321; Y), after the simultaneous flag is turned off (step S325), since the pouring operation is still continued, the process returns to step S307.
[0056]
Next, the isothermal initial control process will be described. FIG. 3 shows the flow of the isothermal initial control process. In this process, first, the electromagnetic valve 44 is closed (step S401). When the isothermal initial control process is executed, since the hot water supply side set temperature (TK) and the bathtub side set temperature (TB) are equal, the hot water heated on the hot water supply flow path 20 side is converted into a heat exchanger. If it is dropped into the bathtub 200 as it is without going through 13 again, the bathtub side set temperature (TB) is satisfied. Therefore, the pouring path is set so that the water from the pouring communication pipe 50 does not flow into the pouring path on the side where the electromagnetic valve 44 is closed and reheated by the heat exchanger 13.
[0057]
Further, it is checked whether or not the pouring electromagnetic valve 51 and the pouring water amount control valve 52 are open (step S402). If they are closed (step S402; N), they are opened (step S403). If the hot water flow rate on the hot water supply side is insufficient due to the simultaneous use being started, the opening degree of the pouring water amount control valve 52 is adjusted (steps S404; Y, S405). Note that the pouring electromagnetic valve 51 and the pouring water amount control valve 52 are closed when any initial control process is executed for the first time after the simultaneous use is started, and before the simultaneous use is started. This is when the hot water supply was used alone.
[0058]
In addition, although not shown in FIG. 3, when the hot water supply side set temperature (TK) or the bathtub side set temperature (TB) is changed during simultaneous use, the mixed water amount control valve 61 may be open. In this case, the mixed water amount control valve 61 is closed.
[0059]
FIG. 4 shows the flow of the non-reheating initial control process. The non-reheating initial process is executed when the hot water supply side set temperature (TK) is higher than the bathtub side set temperature (TB). Therefore, in the non-reheating initial control process, the heat exchanger 13 performs reheating. The pouring route is set so as not to be performed, and the water before heating is mixed with the hot water to be poured.
[0060]
Specifically, first, the solenoid valve 44 is closed (step S501), and the pouring path is set so that the water from the pouring communication pipe 50 does not pass through the heat exchanger 13 again. Next, it is checked whether or not the pouring solenoid valve 51 (S), the pouring water amount control valve 52 (MH), and the mixed water amount control valve 61 (ML) are open (step S502), and any one of them is open. If not (step S502; N), it is opened (step S503).
[0061]
In this state, pouring into the bathtub 200 is performed only through the discharge port 202, and the pouring temperature at that time is detected by the dropping thermistor 47. Therefore, if the temperature (TD) detected by the dropping thermistor 47 is not equal to the bathtub side set temperature (TB) (step S504; N), the pouring water amount control valve 52 and the mixed water amount control valve 61 are set so that they are equal. The opening is adjusted (step S505). It should be noted that the temperature (TD) detected by the dropping thermistor 47 is not equal to the set temperature (TB) on the bathtub side no matter how the opening degrees of the pouring water amount control valve 52 and the mixed water amount control valve 61 are adjusted. (Step S506; N), the dropping operation is temporarily interrupted (step S507).
[0062]
FIG. 5 shows the flow of the reheating initial control process. The reheating initial control process is performed when the bathtub side set temperature (TB) is higher than the hot water supply side set temperature (TK). A part of the water flowing through the pouring communication pipe 50 is reheated and further heated through the heat receiving pipe 41. Then, the pouring route is set so as to drop into the bathtub 200.
[0063]
First, it is checked whether or not the solenoid valve 44 is open. If the solenoid valve 44 is originally open, the solenoid valve 44 is opened if it is closed. 13, the pouring route is set so as to be dropped into the bathtub 200 from the inlet 201 again (step S601). Next, if the pouring solenoid valve 51 and the pouring water amount control valve 52 are not open (step S602; N), they are opened (step S603). That is, when the initial control process is executed for the first time after the simultaneous use is started and the state before the simultaneous use is started is the single use of hot water supply, the pouring solenoid valve 51 and the pouring water amount control are still performed. Since the valves 52 are closed, they are opened.
[0064]
In addition, when the reheating initial control process is performed because the hot water supply side set temperature (TK) and the bathtub side set temperature (TB) are changed during simultaneous use, the mixed water amount control valve 61 may be open. Although not shown in the flowchart, the mixed water amount control valve 61 is temporarily closed in this case.
[0065]
Next, the hot water temperature (TW) dropped into the bathtub 200 is calculated. The amount of hot water dropped into the bathtub 200 from the discharge port 202 is detected by the pouring water amount sensor 48, and the temperature is detected by the dropping thermistor 47. On the other hand, the hot water temperature dropped into the bathtub 200 from the suction port 201 is detected by the bath thermistor 73.
[0066]
The feed water temperature (Tin) is detected by the incoming water thermistor 25, and the hot water supply temperature (outlet hot water temperature ... Tout) is detected by the outgoing hot water thermistor 29. Of the flow rate (Q1) detected by the sensor 48, the amount (Q1L) of water supplied from the water supply mixing channel 60 and the amount (Q1H) of hot water supplied from the pouring communication pipe 50 are found. On the other hand, the hot water amount (QH) supplied from the pouring communication pipe 50 is obtained as a value obtained by subtracting the detected flow rate (Qout) of the hot water side water amount sensor 28 from the detected flow rate (Qin) of the water amount sensor 24. Therefore, by obtaining (Qin−Qout−Q1H), the amount of hot water (Q2H) flowing to the solenoid valve 44 side out of the hot water flowing into the junction 45 is determined.
[0067]
Further, the water supply contained in the hot water dropped from the inlet 201 from the water supply temperature (Tin) detected by the incoming thermistor 25, the hot water supply temperature (Tout) detected by the hot water thermistor 29, and the temperature (Tf) detected by the bath thermistor 73. And the distribution of hot water. The amount of hot water (Q2) dropped into the bathtub 200 through the suction port 201 can be obtained from this distribution ratio and the amount of hot water (Q2H) branched to the joining point 45 and flowing to the solenoid valve 44 side. it can.
[0068]
Thus, since the amount of hot water dropped into the bathtub 200 from each of the suction port 201 and the discharge port 202 and the temperature thereof are obtained, the hot water temperature (TW) when they are merged in the bathtub 200 is calculated using these. It is obtained by
[0069]
When the bathtub drop temperature (TW) thus obtained is not equal to the bathtub side set temperature (TB), the opening amounts of the pouring water amount control valve 52 and the mixed water amount control valve 61 are set so that they are equal. The adjustment is made (step S606), and the bathing temperature (TW) is obtained again by calculation (step S607). If the bathtub dropping temperature (TW) and the bathtub set temperature (TB) are not equal no matter how the opening degree of the pouring water amount control valve 52 and the mixed water amount control valve 61 is adjusted (step S608; N), The pouring solenoid valve 51, the pouring water amount control valve 52, and the mixed water amount control valve 61 are closed (step S609), and the pouring operation is interrupted (step S610). When the bathtub dropping temperature (TW) becomes equal to the bathtub side set temperature (TB), the hot water supply and the pouring are simultaneously used in this state (step S605; Y, step S608; Y).
[0070]
As described above, since the dropping operation at the bathtub side set temperature (TB) to the bathtub 200 can be performed simultaneously with the hot water supply operation regardless of the hot water supply side set temperature (TK). The time required to complete the tension is shortened. In addition, when the hot water supply side set temperature (TK) is lower than the bathtub side set temperature (TB), so-called double conveyance is performed, so that a large drop flow rate per unit time can be secured.
[0071]
Furthermore, even when the hot water supply temperature is lower than the drop-in temperature, the hot water is not poured into the bathtub 200 as it is, so even if there is a bather during the pouring operation, the person may be burned, There is no feeling of discomfort due to hot water.
[0072]
Next, a second embodiment of the present invention will be described.
[0073]
In the second embodiment, the device configuration itself is the same as that shown in the first embodiment, but the solenoid valve 44, the pouring solenoid valve 51, the pouring water amount control valve 52, the mixed water amount control valve. The control content of 61 is different. In the second embodiment, when hot water and hot water are used at the same time, the solenoid valve 44 is maintained as open as possible, and the bathtub dropping temperature is determined depending on the opening of the mixed water amount control valve 61, that is, the amount of mixed water. (TW) is controlled to be the bathtub set temperature (TB). And even if the mixed water amount control valve 61 is fully opened, when the bathtub dropping temperature (TW) becomes higher than the bathtub side set temperature (TB), the electromagnetic valve 44 is closed for the first time.
[0074]
That is, even when the hot water supply side set temperature (TK) is higher than or equal to the bathtub side set temperature (TB), the solenoid valve 44 is set to the open state for the time being, and the opening degree of the mixed water amount control valve 61 ( Adjustment is attempted so that the bathtub drop temperature (TW) becomes the bathtub set temperature (TB) according to the amount of water supply. Accordingly, when the bathtub drop temperature (TW) and the bathtub set temperature (TB) become equal, the simultaneous use is continued with the solenoid valve 44 opened.
[0075]
On the other hand, if the bathtub drop temperature (TW) is higher than the bathtub set temperature (TB) even when the mixed water amount control valve 61 is fully opened, the solenoid valve 44 is closed and the bathtub drop temperature (TW) and the bathtub side are set in this state. The opening degree of the mixed water amount control valve 61 is readjusted so that the set temperature (TB) matches. Thereby, the dropping flow rate per unit time increases, and the time required for completion of filling can be further shortened.
[0076]
Instead of closing the solenoid valve 44 at once, the amount of hot water from the pouring communication pipe 50 may be gradually reduced by the pouring water amount control valve 52. The electromagnetic valve 44 is not necessarily provided. For example, if the bathtub dropping temperature (TW) becomes higher than the bathtub set temperature (TB) even when the mixed water amount control valve 61 is fully opened, the pouring operation may be temporarily interrupted. If the amount of hot water from the hot water supply side can be reduced by the pouring water amount control valve 52, the solenoid valve 44 need not be provided.
[0077]
In each of the embodiments described above, a part of hot water flowing from the pouring communication pipe 50 into the recirculation circulation passage 40 is configured to flow toward the electromagnetic valve 44 side. An electromagnetic valve for switching the pipe between a closed state and an open state is provided between the junctions 46, and the solenoid valve 44 is opened with the pipe closed, so that all the hot water from the pouring communication pipe 50 is opened. You may make it flow to 44 side. Thereby, even if the hot water supply side set temperature (TK) is considerably lower than the bathtub side set temperature (TB), it is possible to increase the dropping temperature into the bathtub 200 to the bathtub side set temperature (TB).
[0078]
Further, a water amount control valve may be arranged in series with the electromagnetic valve 44 so that only the amount of hot water to be reheated can be adjusted independently.
[0079]
In each embodiment, the electromagnetic valve 44 is closed so as not to pass through the heat exchanger 13 again. However, as shown in FIG. 6, a three-way valve 150 is arranged instead of the electromagnetic valve 44, and the heat exchanger 13. The bypass path 151 may be provided between one connection port of the three-way valve 150 and a predetermined portion of the recirculation return pipe 42. When the heat exchanger 13 is re-routed, the three-way valve 150 is communicated as indicated by an arrow 152, and when the heat exchanger 13 is bypassed, the three-way valve 150 is communicated as indicated by an arrow 153. In this way, even when the heat exchanger 13 is bypassed and reheating is avoided, hot water can be dropped into the bathtub 200 from both the suction port 201 and the discharge port 202 (double transport state). ), The time required to complete the filling can be shortened.
[0080]
In addition, in embodiment, even if it adjusts the opening degree of the pouring electromagnetic valve 51 or the mixed water amount control valve 61, when dropping cannot be performed at the temperature that matches the bathtub side set temperature (TB), the dropping operation is interrupted. However, the dropping operation may be continued in a state in which the temperatures do not match, and the hot water temperature in the bathtub 200 may be adjusted by performing a predetermined post-processing after the dropping is completed.
[0081]
Specifically, how many liters of hot water were poured during dropping and always memorized it, and memorized this, after the simultaneous use is finished or after pouring to a predetermined water level, The hot water temperature in the bathtub 200 is made to coincide with the bathtub side set temperature (TB) by performing post-processing such as pouring water or performing reheating. In this way, even when the dropping operation is not interrupted, the temperature of the hot water dropped into the bathtub 200 during simultaneous use of pouring and hot water supply is controlled to be as close as possible to the bathtub side set temperature (TB). Therefore, the amount of temperature correction in the post-processing is small, and the time required for completion of filling is shortened compared to the conventional one.
[0082]
【The invention's effect】
According to the canned multi-channel hot water bath according to the present invention, water flowing from the pouring pipe is exchanged only when hot water and pouring are used simultaneously and the hot water set temperature is lower than the bathtub set temperature. When the set temperature on the hot water supply side is not lower than the set temperature on the bathtub side, the water flowing from the pouring connection pipe is not reheated with the heat exchanger, and the water supply is mixed as necessary. Therefore, no matter what set temperature the hot water supply side is used, the pouring operation can be continued at a temperature close to or coincident with the bathtub side set temperature, and the time required for completion of filling can be shortened. it can.
[0083]
In addition, while adjusting the mixing amount of the feed water, the pouring temperature to the bathtub can be matched with the set temperature on the bathtub side, the reheating state is maintained, and even if the mixing amount of the feed water is maximized, the pouring water is maintained. Only when the temperature is higher than the set temperature on the bathtub side, reheating in the heat exchanger is performed as much as possible so that the flow rate of pouring water per unit time increases. In addition, the hot water filling time can be further shortened.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram showing a configuration of a single can multi-channel hot water hot water bath according to first and second embodiments of the present invention.
FIG. 2 is a flowchart showing a flow of operations performed by the single can multi-channel hot water hot water bath according to the first embodiment of the present invention.
FIG. 3 is a flowchart showing an isothermal initial control process performed by the single can multi-channel hot water hot water bath according to the first embodiment of the present invention.
FIG. 4 is a flowchart showing a non-reheating initial control process performed by the single can multi-channel hot water hot water bath according to the first embodiment of the present invention.
FIG. 5 is a flowchart showing a reheating initial control process performed by the single can multi-channel hot-water supply hot water bath according to the first embodiment of the present invention.
FIG. 6 is an explanatory diagram showing a configuration of a single-can multi-water-type hot-water hot water bath provided with a bypass that bypasses the heat exchanger.
[Explanation of symbols]
10. One can multi-water channel hot water bath
12 ... Burner
13 ... Heat exchanger
20 ... Hot water supply channel
21 ... Hot water supply heat pipe
22 ... Water pipe
23 ... Hot water supply pipe
24 ... Water volume sensor
25 ... Incoming thermistor
28 ... Hot water side water volume sensor
29 ... Hot spring thermistor
40 ... Circulating circulation channel
41 ... Reheating tube
42 ... Rebirth pipe
43.
44 ... Solenoid valve
45 ... Junction
46 ... Water supply confluence
47 ... Dropping thermistor
48 ... Pouring water volume sensor
49 ... Pressure sensor
50. Pouring pipe
51 ... Pouring solenoid valve
52 ... Pouring water amount control valve
60 ... Water supply mixing channel
61 ... Mixed water control valve
62. Check valve
71 ... circulation pump
73 ... Bath thermistor
100: Control unit
111 ... Setting temperature comparison means
112 ... Pouring path switching control means
113 ... Pouring flow control means
114... Mixing flow rate control means
150 ... Three-way valve
151 ... Bypass road
200 ... bathtub
201 ... inlet
202 ... discharge port

Claims

One can many through a common heat exchanger in which a recirculation circulation channel connecting between the suction port and the discharge port provided in the bathtub and a hot water supply channel for feeding water are heated by a predetermined heating device A water channel type hot water bath, branched from the hot water supply channel at a predetermined location on the exit side of the heat exchanger, and merged into the recirculation circulation channel at a predetermined location other than the portion passing through the heat exchanger. A pouring communication pipe, and a pouring switching valve that is provided in the middle of the pouring communication pipe and switches whether or not the water in the hot water supply flow path flows to the recirculation circulation channel side through the pouring communication pipe. And when the hot water pouring operation and the hot water supplying operation for pouring hot water heated in the hot water supplying passage into the bathtub through the pouring connecting pipe and the recirculation circulation passage are performed simultaneously, In what is controlled based on the temperature of the side,
A pouring route switching means, a pouring route switching control means, and a set temperature comparison means,
The set temperature comparison means compares the bathtub side set temperature with the hot water supply side set temperature,
The pouring path switching means includes a reheating state in which part or all of the water that has flowed into the recirculation circulation channel through the pouring communication pipe flows into the bathtub through the heat exchanger again. The path state during pouring is switched to a non-reheated state in which all of the water that has flowed into the recirculation circulation channel through the pouring communication pipe flows into the bathtub without going through the heat exchanger again. Yes,
The pouring route switching control means switches the pouring route so that the reheating state is formed when the hot water supply operation and the pouring operation are performed simultaneously and the hot water supply side set temperature is lower than the bathtub side set temperature. When the hot water supply operation and the pouring operation are performed at the same time and the hot water supply side set temperature is equal to or higher than the bathtub side set temperature, the non-reheating state is formed so that the non-reheating state is formed. A canned multi-channel hot water hot water bath.

One can many through a common heat exchanger in which a recirculation circulation channel connecting between the suction port and the discharge port provided in the bathtub and a hot water supply channel for feeding water are heated by a predetermined heating device A water channel type hot water bath, branched from the hot water supply channel at a predetermined location on the exit side of the heat exchanger, and merged into the recirculation circulation channel at a predetermined location other than the portion passing through the heat exchanger. A pouring communication pipe, and a pouring switching valve that is provided in the middle of the pouring communication pipe and switches whether or not the water in the hot water supply flow path flows to the recirculation circulation channel side through the pouring communication pipe. And when the hot water pouring operation and the hot water supplying operation for pouring hot water heated in the hot water supplying passage into the bathtub through the pouring connecting pipe and the recirculation circulation passage are performed simultaneously, In what is controlled based on the temperature of the side,
A pouring path switching means, a pouring path switching control means, a set temperature comparison means, a feed water mixing flow path, a mixing amount adjusting valve, and a mixing amount control means,
The set temperature comparison means compares the bathtub side set temperature with the hot water supply side set temperature,
The pouring path switching means includes a reheating state in which part or all of the water that has flowed into the recirculation circulation channel through the pouring communication pipe flows into the bathtub through the heat exchanger again. The path state during pouring is switched to a non-reheated state in which all of the water that has flowed into the recirculation circulation channel through the pouring communication pipe flows into the bathtub without going through the heat exchanger again. Yes,
The pouring route switching control means switches the pouring route so that the reheating state is formed when the hot water supply operation and the pouring operation are performed simultaneously and the hot water supply side set temperature is lower than the bathtub side set temperature. When the hot water supply operation and the pouring operation are performed at the same time and the hot water supply side set temperature is equal to or higher than the bathtub side set temperature, the non-reheating state is formed so that the non-reheating state is formed. To set
The water supply mixing channel is branched from the hot water supply channel at a predetermined location on the inlet side of the heat exchanger and merged at a predetermined location with the recirculation flow channel for reheating,
The mixing amount adjustment valve adjusts the flow rate of the feed water that flows into the recirculation circulation channel through the feed water mixing channel,
In the mixing amount control means, when the hot water supply operation and the pouring operation are performed at the same time and the mixing amount adjustment valve is closed, the pouring temperature to the bathtub becomes higher than the set temperature on the bathtub side. When the mixing amount adjusting valve is opened, water is poured from the feed water mixing channel into the recirculation circulation channel.

One can many through a common heat exchanger in which a recirculation circulation channel connecting between the suction port and the discharge port provided in the bathtub and a hot water supply channel for feeding water are heated by a predetermined heating device A water channel type hot water bath, branched from the hot water supply channel at a predetermined location on the exit side of the heat exchanger, and merged into the recirculation circulation channel at a predetermined location other than the portion passing through the heat exchanger. A pouring communication pipe, and a pouring switching valve that is provided in the middle of the pouring communication pipe and switches whether or not the water in the hot water supply flow path flows to the recirculation circulation channel side through the pouring communication pipe. And when the hot water pouring operation and the hot water supplying operation for pouring hot water heated in the hot water supplying passage into the bathtub through the pouring connecting pipe and the recirculation circulation passage are performed simultaneously, In what is controlled based on the temperature of the side,
A pouring path switching means, a pouring path switching control means, a feed water mixing flow path, a mixing amount adjusting valve, and a mixing amount control means,
The pouring path switching means includes a reheating state in which part or all of the water that has flowed into the recirculation circulation channel through the pouring communication pipe flows into the bathtub through the heat exchanger again. The path state during pouring is switched to a non-reheated state in which all of the water that has flowed into the recirculation circulation channel through the pouring communication pipe flows into the bathtub without going through the heat exchanger again. Yes,
The water supply mixing channel is branched from the hot water supply channel at a predetermined location on the inlet side of the heat exchanger and merged at a predetermined location with the recirculation flow channel for reheating,
The mixing amount adjustment valve adjusts the flow rate of the feed water that flows into the recirculation circulation channel through the feed water mixing channel,
The mixing amount control means controls the opening degree of the mixing amount adjusting valve so that the pouring temperature to the bathtub becomes the set temperature on the bathtub side when the hot water supply operation and the pouring operation are performed simultaneously. And
The pouring path switching control means sets the pouring path switching means so that the reheating state is always formed, and when the hot water supply operation and the pouring operation are performed simultaneously, Even when the mixing amount adjusting valve is fully opened, when the pouring temperature to the bathtub becomes higher than the set temperature on the bathtub side, the pouring path switching means is set so that the non-reheating state is formed. A one-can multi-channel hot-water hot water bath with a certain feature.

The pouring path switching means is a switching valve that switches between opening and closing the flow path, and the recirculation for reheating at a location where the pouring communication pipe joins the recirculation flow path for reheating The flow path is divided into a heat exchanger passing side and a heat exchanger non-passing side, and is attached to a pipe portion on the heat exchanger passing side. One can multi-waterway hot water bath.

It comprises water amount adjusting means for adjusting the amount of water on the side flowing into the bathtub again through the heat exchanger out of the water flowing into the recirculation circulation channel through the pouring pipe. The one-can multiple water channel type hot water bath tub according to claim 1, 2, 3 or 4 .