JP3776990B2

JP3776990B2 - One can two water channel compounder

Info

Publication number: JP3776990B2
Application number: JP24900896A
Authority: JP
Inventors: 幸伸野口; 順裕土屋
Original assignee: 株式会社ガスター
Priority date: 1996-08-30
Filing date: 1996-08-30
Publication date: 2006-05-24
Anticipated expiration: 2016-08-30
Also published as: JPH1073313A

Description

【０００１】
【発明の属する技術分野】
本発明は、風呂の追い焚き機能と給湯機能を備えた一缶二水路複合器に関するものである。
【０００２】
【従来の技術】
図８には出願人が開発している一缶二水路複合器のシステム構成が実線で示されている。同図において、器具ケース１内には給湯熱交換器２と追い焚き熱交換器３とが一体化されて配設されている。すなわち、複数の共通のフィンプレート４に給湯側の管路を貫通装着して給湯熱交換器２と成し、同じくフィンプレート４に追い焚き側の管路を貫通装着して追い焚き熱交換器３と成している。
【０００３】
これら一体化された熱交換器の下方側には給湯熱交換器２と追い焚き熱交換器３を共通に加熱するバーナ５が配置されており、このバーナ５の燃焼の給排気を行う燃焼ファン６が下側に配置されている。バーナ５にはガス通路９が接続されており、このガス通路９には通路の開閉を行う電磁弁７，８とガスの供給量（バーナの燃焼熱量）を開弁量によって制御する比例弁10が介設されている。なお、前記比例弁10の開弁量制御は、具体的には、比例弁10に印加される電流（開弁駆動電流）の可変制御によって行われている。
【０００４】
前記給湯熱交換器２の入側には給水管11が接続されており、この給水管11には給水温度を検出する給水温度検出センサ12と、給水流量（湯張りの場合には湯張り流量）を検出する流量検出センサ13が設けられている。なお、給水管11の入口側は水道管に接続されている。
【０００５】
前記給湯熱交換器２の出側には給湯管14が接続されており、この給湯管14は外部配管を介して台所等の所望の給湯場所に導かれている。前記給湯熱交換器２の出側の流路には給湯温度を検出する給湯温度センサ15が設けられている。
【０００６】
前記追い焚き熱交換器３の入側には管路16の一端側が接続され、管路16の他端側は循環ポンプ17の吐出側に接続されている。そして、循環ポンプ17の吸込側と浴槽18は戻り管20によって接続されており、この戻り管20には浴槽18の循環湯水の温度を風呂温度として検出する風呂温度センサ21が設けられている。前記追い焚き熱交換器３の出側には往管22の一端側が接続され、往管22の他端側は浴槽18に接続されており、浴槽18から戻り管20を介して循環ポンプ17、管路16、追い焚き熱交換器３および往管22を介して浴槽18に至る通路は追い焚き循環通路23を構成している。
【０００７】
前記給湯熱交換器２の給湯管14は給湯通路として機能し、この給湯管14と追い焚き循環通路23（図８においては管路16）は湯張り通路24によって連通接続されており、この湯張り通路24には通路の開閉を行う電磁弁等により構成される注湯弁25が介設され、この注湯弁25の下流側の湯張り通路24には浴槽18の水位を水圧によって検出する水位センサ（圧力センサ）26が設けられている。
【０００８】
前記流量検出センサ13、温度センサ12，15，21、水位センサ26等のセンサ検出信号は制御装置27に加えられており、この制御装置27にはリモコン28が接続されている。このリモコン28には給湯温度を設定する給湯温度設定手段や、風呂温度を設定する風呂温度設定手段や、湯張り運転を指令するボタンや、必要な情報を表示する表示部等が設けられている。
【０００９】
前記制御装置27は各種センサ検出信号とリモコン28の情報を取り込み、内部に与えられているシーケンスプログラムに従い、給湯運転と、湯張り運転と、追い焚き運転を次のように制御する。
【００１０】
例えば、台所等に導かれた給湯通路の水栓30が開けられ、流量検出センサ13により作動流量が検出されると、燃焼ファン６の回転が行われ、電磁弁７，８の開動作が行われてバーナ５に燃料ガスが供給されると共に、図示されていない点着火手段によりバーナ５の燃焼が行われ、給湯温度センサ15で検出される給湯温度がリモコン28で設定される給湯設定温度に一致するように比例弁10への開弁駆動電流を制御し、給湯熱交換器２を通る水をバーナ５の火炎により加熱して設定温度の湯を作り出し、この湯を給湯管14を介して給湯場所へ給湯する。
【００１１】
そして、水栓30が閉められて、流量検出センサ13からオフ信号が出力されたときに、バーナ燃焼を停止し、給湯運転モードの動作を終了する。
【００１２】
また、リモコン28により湯張り運転モードが指令されると、注湯弁25が開けられる。そして、流量検出センサ13により作動流量が検出されると、給湯運転の場合と同様にバーナ５の燃焼が開始し、給湯熱交換器２で作り出された湯は給湯管14、湯張り通路24を通り、さらに分岐して管路16から追い焚き熱交換器３を経て往管22を通る通路と戻り管20を通る通路の両側から浴槽18に湯が落とし込まれる。そして、設定水位までの湯の水量が落とし込まれたとき、又は水位センサ26により設定水位が検出されたときに注湯電磁弁25が閉じられバーナ５の燃焼が停止して湯張り運転モードの動作が終了する。
【００１３】
追い焚き運転モードの動作においては、注湯弁25が閉じられている状態で、循環ポンプ17が回転駆動され、浴槽18内の湯水の循環が追い焚き循環通路23を介して行われ、風呂温度センサ21により浴槽の風呂温度が検出される。そして、風呂検出温度が風呂設定温度よりも低いときには、バーナ５の燃焼が行われ、追い焚き循環通路23を通して循環する浴槽湯水を追い焚き熱交換器３で加熱する。風呂温度センサ21により浴槽湯水の温度が風呂設定温度に達したことが検出されたときに、循環ポンプ17の停止とバーナ５の燃焼停止が行われて追い焚き運転モードの動作が終了する。
【００１４】
上記の如く、一缶二水路複合器は、共通のバーナ５を用いて一体化された給湯熱交換器２と追い焚き熱交換器３を加熱する方式なので、別体に設けられた給湯熱交換器と追い焚き熱交換器をそれぞれ別個のバーナを用いて燃焼加熱する方式に比べ、装置構成の簡易化が図れ、これに伴い、装置（器具）の小型化とコスト低減が図れることになる。
【００１５】
【発明が解決しようとする課題】
しかしながら、給湯熱交換器２と追い焚き熱交換器３とが一体化されて共通のバーナ５により燃焼加熱される方式であるため、例えば、給湯運転の終了直後に循環ポンプ17を駆動して追い焚き運転が行われると、給湯燃焼直後には、給湯燃焼によって加熱された追い焚き熱交換器３内の滞留湯水はバーナ５の燃焼加熱により高温となっており、給湯燃焼停止直後も、追い焚き熱交換器３の缶体の保有熱量が追い焚き熱交換器内湯水に伝達されるために、追い焚き熱交換器内湯温は極端な場合には沸騰寸前の高温となり、この高温の湯が循環ポンプ17の回転直後に浴槽18内に入り込み、浴槽18内の入浴者がこの高温の湯に触れる危険があった。
【００１６】
本発明は給湯燃焼運転の直後に追い焚き指令が出されて追い焚き運転を行う場合においても、給湯燃焼により高温に加熱された追い焚き熱交換器内の湯が浴槽内に入り込む危険を防止できる安全性の高い一缶二水路複合器を提供することにある。
【００１７】
【課題を解決するための手段】
本発明は上記目的を達成するために、次のような手段を講じている。すなわち、第１の発明は、給水通路から供給される水を加熱して給湯通路へ送出する給湯熱交換器と、循環ポンプを備えた浴槽湯水の追い焚き循環通路に組み込まれ循環ポンプの駆動によって循環する循環湯水の追い焚きを行う追い焚き熱交換器とが一体化され、この一体化された給湯熱交換器と追い焚き熱交換器を燃焼ファンにより供給される空気を利用し共通のバーナによって燃焼加熱する方式の一缶二水路複合器において、前記追い焚き熱交換器内湯水の温度を直接的又は間接的に検出する温度センサが設けられており、前記バーナの給湯燃焼停止後に追い焚き指令が加えられたときに前記温度センサから取り込まれた検出温度が予め与えられている基準判定温度よりも高いときには前記循環ポンプの駆動に先駆けて燃焼ファンを駆動しファン通風により追い焚き熱交換器内湯温を冷却してから循環ポンプの追い焚き駆動を行うポンプ駆動タイミング制御手段が設けられている構成をもって課題を解決する手段としている。
【００１８】
第２の発明は、給水通路から供給される水を加熱して給湯通路へ送出する給湯熱交換器と、循環ポンプを備えた浴槽湯水の追い焚き循環通路に組み込まれ循環ポンプの駆動によって循環する循環湯水の追い焚きを行う追い焚き熱交換器とが一体化され、この一体化された給湯熱交換器と追い焚き熱交換器を燃焼ファンにより供給される空気を利用し共通のバーナによって燃焼加熱する方式の一缶二水路複合器において、給湯燃焼停止後からの時間を計測する時間計測手段と、給湯燃焼停止後における追い焚き熱効果に内湯水温度の時間の経過に伴う経時変化の温度データを持つデータ格納部とが設けられており、前記バーナの給湯燃焼停止後に追い焚き指令が加えられたときに給湯燃焼停止時からの時間の経過に対応した追い焚き熱交換器内湯温の推定温度を前記データ格納部の経時変化の温度データから求め、この求められた推定温度が予め与えられている基準判定温度よりも高いときには前記循環ポンプの駆動に先駆けて燃焼ファンを駆動しファン通風により追い焚き熱交換器内湯温を冷却してから循環ポンプの追い焚き駆動を行うポンプ駆動タイミング制御手段が設けられている構成をもって課題を解決する手段としている。
【００１９】
第３の発明は、前記第１又は第２の発明の構成を備えたものにおいて、基準判定温度よりも低温側に空冷停止温度が与えられており、ポンプ駆動タイミング制御手段は燃焼ファンを駆動しファン通風により追い焚き熱交換器内湯温が前記空冷停止温度以下に低下したと判断したときに循環ポンプの追い焚き駆動を行う構成としたことをもって課題を解決する手段としている。
【００２０】
第４の発明は、給水通路から供給される水を加熱して給湯通路へ送出する給湯熱交換器と、循環ポンプを備えた浴槽湯水の追い焚き循環通路に組み込まれ循環ポンプの駆動によって循環する循環湯水の追い焚きを行う追い焚き熱交換器とが一体化され、この一体化された給湯熱交換器と追い焚き熱交換器を燃焼ファンにより供給される空気を利用し共通のバーナによって燃焼加熱する方式の一缶二水路複合器において、前記追い焚き熱交換器内湯水の温度を直接的又は間接的に検出する温度センサが設けられており、追い焚き循環通路には循環湯水の流量を制御する流量制御機構が設けられ、前記バーナの給湯燃焼停止後に追い焚き指令が加えられたときに前記温度センサから取り込まれた検出温度が予め与えられている基準判定温度よりも高いときには循環ポンプの駆動によって循環する追い焚き循環湯水の流量を前記流量制御機構を制御して予め与えられているデータに従い絞り制御する流量制御回路が設けられている構成をもって課題を解決する手段としている。
【００２１】
第５の発明は、給水通路から供給される水を加熱して給湯通路へ送出する給湯熱交換器と、循環ポンプを備えた浴槽湯水の追い焚き循環通路に組み込まれ循環ポンプの駆動によって循環する循環湯水の追い焚きを行う追い焚き熱交換器とが一体化され、この一体化された給湯熱交換器と追い焚き熱交換器を燃焼ファンにより供給される空気を利用し共通のバーナによって燃焼加熱する方式の一缶二水路複合器において、給湯燃焼停止後からの時間を計測する時間計測手段と、給湯燃焼停止後における追い焚き熱効果に内湯水温度の時間の経過に伴う経時変化の温度データを持つデータ格納部とが設けられており、前記バーナの給湯燃焼停止後に追い焚き指令が加えられたときに給湯燃焼停止時からの時間の経過に対応した追い焚き熱交換器内湯温の推定温度を前記データ格納部の経時変化の温度データから求め、この求められた推定温度が予め与えられている基準判定温度よりも高いときには循環ポンプの駆動によって循環する追い焚き循環湯水の流量を前記流量制御機構を制御して予め与えられているデータに従い絞り制御する流量制御回路が設けられている構成をもって課題を解決する手段としている。
【００２２】
第６の発明は、浴槽内湯水温度を検出する風呂温度センサと、追い焚き熱交換器内湯温をファン通風冷却してから追い焚き駆動を行う請求項１又は請求項２又は請求項３記載のポンプ駆動タイミング制御手段と、追い焚き循環湯水の流量を流量制御機構を制御して絞り制御する請求項４又は請求項５記載の流量制御回路とが設けられ、前記風呂温度センサによって検出される浴槽内湯水温度が予め与えられるしきい値温度以上のときはポンプ駆動タイミング制御手段を動作させて追い焚きを行わせ、浴槽内湯水温度が前記しきい値温度未満のときは流量制御回路を動作させて追い焚きを行わせる追い焚きモード選択指定部が備えられている構成をもって課題を解決する手段としている。
【００２３】
第７の発明は前記第６の発明の構成を備えた上で、風呂の沸き上げ目標温度である風呂設定温度の下側近傍にマイルド温度範囲が与えられており、追い焚きモード選択指定部は、風呂温度センサによって検出される浴槽内湯水温度が前記マイルド温度範囲内のときにはポンプ駆動タイミング制御手段と流量制御回路を共に併用動作させて追い焚きを行わせる構成としたことをもって課題を解決する手段としている。
【００２４】
上記発明の構成において、給湯燃焼停止直後に、追い焚き運転が指令されたときには、追い焚き熱交換器内湯温を検出する温度センサが設けられている構成にあっては、その温度センサにより追い焚き熱交換器内湯温が検出され、その検出湯温が予め与えられている基準判定温度よりも高いときには、燃焼ファンが強制的に回転駆動されて、追い焚き熱交換器の空冷が行われ、追い焚き熱交換器内湯温を冷却してから循環ポンプの追い焚き駆動が行われる。
【００２５】
また、給湯燃焼停止後からの追い焚き熱交換器内湯温の時間経過に伴う経時温度変化のデータが予め与えられている構成のものにあっては、給湯燃焼停止直後からの時間が時間計測手段により測定され、その時間の経過に対応する追い焚き熱交換器内湯温がその経時温度変化のデータから読み出され、その読み出し温度データが予め与えられている基準判定温度よりも高いときには、循環ポンプの駆動に先駆けて燃焼ファンの回転駆動が行われて、追い焚き熱交換器のファン通風による冷却が行われ、この冷却の後、循環ポンプを駆動して追い焚き運転が行われる。
【００２６】
このように、本発明では、給湯燃焼直後に追い焚き運転が指令された場合には、追い焚き熱交換器内の湯温が温度センサによる検出により、または経時温度変化のデータに基づき求められ、基準判定温度よりも高いときには冷却してから循環ポンプを駆動して追い焚き運転が開始されるようにしているので、給湯燃焼直後の追い焚き熱交換器内高温の湯が浴槽に入り込むのを防止でき、安全性の高い追い焚き運転が行われる結果となり、本発明の目的とする課題解決が達成される。
【００２７】
【発明の実施の形態】
以下、本発明の実施形態例を図面に基づき説明する。図１は本発明の第１実施形態例の要部構成を示すもので、温度センサ31と、ポンプ駆動タイミング制御手段32と、データ格納部33とを有して構成されている。温度センサ31は図８に鎖線で示すように、追い焚き熱交換器３に設けられて、追い焚き熱交換器３内の湯温を検出する構成となっている。この実施形態例の一缶二水路複合器のシステム構成は、追い焚き熱交換器３に温度センサ31を設けた以外は、前記図８の実線で示すものと同様であり、同一名称部分には同一符号を付し、その重複説明は省略する。前記ポンプ駆動タイミング制御手段32と、データ格納部33は制御装置27内に設けられており、データ格納部33には、図７に示すような基準判定温度と空冷停止温度のデータが格納されている。
【００２８】
図７は給湯燃焼停止時からの時間の経過に伴う追い焚き熱交換器３内の湯温の経時温度変化データを示すものである。この図から明らかなように、給湯燃焼時には、その給湯のバーナ燃焼により追い焚き熱交換器３も同時に加熱されることから、追い焚き熱交換器３内の湯温は風呂設定温度よりも高くなっており、給湯燃焼停止直後には、さらにバーナ燃焼により追い焚き熱交換器が蓄積保有していた熱が追い焚き熱交換器内の滞留湯水に伝達して追い焚き熱交換器３内の湯温はさらに上昇し、その後、自然空冷により追い焚き熱交換器３の保有熱量が放熱されて追い焚き熱交換器３内の湯の温度が除々に低下している現象を示している。基準判定温度は、それよりも高い温度の湯が追い焚き熱交換器３内から浴槽18に落とし込まれたときには危険の虞があり、それ以下の温度であれば、浴槽18内に入り込んでも危険性がないと考えられる境界の温度で、例えば、風呂設定温度42℃に対して基準判定温度は50℃の値で与えられている。
【００２９】
空冷停止温度は風呂設定温度よりも僅かに高めの温度（例えば43℃）で与えられている（もちろん、空冷停止温度は風呂設定温度以下の温度で与えられることができる）。この空冷停止温度は、その温度の湯が浴槽18内に入り込んでも全く危険性がない安全な温度値で与えられている。
【００３０】
ポンプ駆動タイミング制御手段32は、給湯燃焼停止後に、追い焚き指令が加えられたときには、温度センサ31から追い焚き熱交換器３内の湯水温度の検出値を取り込み、データ格納部33に格納されている基準判定温度と比較する。そして、追い焚き熱交換器内湯温の検出温度が基準判定温度よりも高い場合には、循環ポンプ17を駆動しての追い焚き運転に先駆けて、燃焼ファン６を回転駆動し、追い焚き熱交換器３のファン通風による空冷を行う。
【００３１】
そして、燃焼ファン６のファン駆動中に、温度センサ31の検出温度を時々刻々取り込み、温度センサ31の検出温度を前記基準判定温度や空冷停止温度と比較する。そして、温度センサ31の検出温度が空冷停止温度に達したときに、循環ポンプ17を駆動させて追い焚き運転を開始させる。
【００３２】
この第１実施形態例では、給湯燃焼停止後に、追い焚き熱交換器３内の湯水温度が危険の虞がある基準判定温度よりも高い場合には、追い焚き運転を直ちに行わず、燃焼ファン６を駆動して追い焚き熱交換器３内の湯を空冷し、安全な空冷停止温度にまで冷却されたときに始めて循環ポンプ17を駆動して追い焚き運転を開始するようにしたので、給湯燃焼によって高温の湯となった追い焚き熱交換器内の湯が浴槽18に入り込むことはなくなり、浴槽18に入浴している者がこの高温の湯に触れて火傷を負う危険は完璧に回避され、安全性の高い追い焚き運転を行うことが可能となる。
【００３３】
図２は本発明の第２実施形態例を示す要部ブロック構成図である。この第２実施形態例は、追い焚き熱交換器３内の湯温を温度センサ31によって検出せずに、予め与えられるデータに基づき追い焚き熱交換器内の湯温を推定して追い焚き時の安全を図る構成としたことを特徴としており、それ以外の構成は前記第１実施形態例と同様である。
【００３４】
第２実施形態例の特徴的な構成は、時間計測手段34と、ポンプ駆動タイミング制御手段32と、データ格納部33とを有して構成されている。
【００３５】
前記データ格納部33には、前記基準判定温度と空冷停止温度の他に、前記図７に示すような給湯燃焼停止後からの追い焚き熱交換器３内の湯温の経時温度変化データが格納されている。この経時温度変化のデータは、給湯燃焼熱量、給湯熱交換器２と追い焚き熱交換器３が一体化されている熱交換器缶体の大きさ（熱容量）、外気温等の１個以上のパラメータを考慮し、これらのパラメータによって、時間の経過に伴い、追い焚き熱交換器３内の滞留湯温の経時温度変化を実験等により予め求めておき、これらのデータが追い焚き熱交換器内湯温の経時温度変化データとしてデータ格納部33に格納されている。
【００３６】
また、データ格納部33には、ファン通風の冷却による温度変化データが格納される。このファン通風の冷却による温度変化データは、追い焚き熱交換器３に燃焼ファン６のファン風量を通過させた場合に、その熱交換器内湯温の温度変化を実験等により測定し、これを追い焚き熱交換器３内湯温の冷却温度データとしてデータ格納部33に格納される。
【００３７】
時間計測手段34は、給湯燃焼の停止時からの経過時間を計測し、その時間計測結果をポンプ駆動タイミング制御手段32に加える。
【００３８】
ポンプ駆動タイミング制御手段32は、時間計測手段34の時間計測信号を受け、データ格納部33に格納されている経時温度変化のデータと照らし合わせ、給湯燃焼停止時から時間の経過に対応する追い焚き熱交換器内湯温を経時温度変化データから求め、追い焚き熱交換器内湯温の経時温度データを推定する。
【００３９】
そして、追い焚き指令が出されたときに、この時間の経過に伴う追い焚き熱交換器内湯温の推定温度と、データ格納部33に与えられている基準判定温度とを比較し、推定温度が基準判定温度よりも高いときには、前記第１実施形態例と同様に燃焼ファン６を駆動して追い焚き熱交換器３をファン通風により空冷する。そして、そのファン空冷による追い焚き熱交換器３内の湯温の冷却温度データに基づき、追い焚き熱交換器内湯温が空冷停止温度まで低下したと判断されたときに、循環ポンプ17を駆動して追い焚き運転を行わせる。
【００４０】
この第２実施形態例も、追い焚き熱交換器３内の推定湯温が基準判定温度よりも高いと判断されたときには、燃焼ファン６のファン通風により、追い焚き熱交換器３内の湯温が空冷停止温度まで冷却するまで待ち、然る後に、循環ポンプ17を駆動して追い焚き運転を行うように構成しているので、前記第１実施形態例と同様に給湯燃焼によって高温となった追い焚き熱交換器３内の湯が浴槽18に入り込むことはなく、安全性の高い追い焚き運転が可能となる。
【００４１】
図３は本発明の第３実施形態例を示すブロック構成図である。この第３実施形態例は、給湯燃焼によって加熱された追い焚き熱交換器３内の高温の湯を燃焼ファン６によって空冷せずに、追い焚き循環湯水の流量を絞って追い焚き熱交換器３内の高温の湯が浴槽18に入り込むことがないように制御した点に特徴があり、それ以外の構成は前記第１実施形態例と同様である。
【００４２】
この第３実施形態例において特徴的な構成は、追い焚き熱交換器３内の湯温を検出する温度センサ31と、流量制御回路35と、流量制御機構36と、データ格納部33とを有して構成されている。流量制御機構36は、風呂の追い焚き循環を行う際に、追い焚き循環通路23を循環する循環湯水の流量を制御する機構であり、この流量制御機構は適宜の手段を用いて構成され、例えば、図６に示すように、追い焚き循環通路23内に流量制御用のダンパ37を設け、このダンパ37の回転軸38を回転して追い焚き循環通路23内の流量を絞り制御する機構として構成することができるし、あるいは、図８に示される循環ポンプ17のポンプ回転を制御し、ポンプ回転速度を低くすることにより、追い焚き循環通路23を循環する流量を絞るように構成することが可能であり、適宜の手段によって流量制御機構が構成される。
【００４３】
データ格納部33には、前記第１実施形態例と同様な基準判定温度が格納される。
【００４４】
流量制御回路35は、給湯燃焼停止後、温度センサ31の追い焚き熱交換器内湯温の検出値を取り込み、その追い焚き熱交換器内検出湯温とデータ格納部33に格納されている基準判定温度とを比較し、追い焚き指令時の検出温度が基準判定温度よりも高い場合には、流量制御機構36を動作させ、追い焚き循環通路の循環湯水流量を絞り制御する。
【００４５】
この流量制御回路35の流量絞り制御により、追い焚き循環流量は絞られて、追い焚き熱交換器３内の湯温が高温になっていたとしても、循環流量が小さく、流速も遅くなるため、追い焚き熱交換器３から浴槽18に至る経路で放熱が進み、浴槽18に達するまでには、基準判定温度以下の温度となって浴槽18に入り込むために、浴槽18内で高温の湯に触れるという危険がなくなり、追い焚きの安全が図られる。
【００４６】
流量制御回路35は、流量制御機構36を動作させて追い焚き循環流量の絞り制御を行っている間、温度センサ31の検出温度を時々刻々サンプリングしており、給湯燃焼による追い焚き熱交換器３内の高温の湯が全て浴槽18側に供給されて、温度センサ31の検出温度が基準判定温度以下になったとき、あるいは前記第１実施形態例における空冷停止温度に相当する温度まで低下したときに、流量制御機構36の絞り動作を停止し、追い焚き循環流量を元の定常の流量に戻して追い焚き循環を行わせる。
【００４７】
なお、流量制御回路35による流量の絞り制御の形態としては、温度センサ31で検出される追い焚き熱交換器内湯温が基準判定温度よりも高いときには予め定めた一定量の流量を絞るようにしてもよく、あるいは、基準判定温度に対する温度上昇分に比例した量だけ流量を絞り制御するようにしてもよく、流量の絞り制御形態は適宜に設定される。
【００４８】
この第３実施形態例においても、給湯燃焼停止後、追い焚き運転が行われたときには、追い焚き熱交換器内の湯水が給湯燃焼により高温になったとしても、追い焚き運転開始時には、その高温の湯が検出されることにより、追い焚き循環流量が絞り制御されるために、浴槽18に達するまでには管路からの放熱拡散により冷却された温度になって浴槽に入り込むため、浴槽18内で高温の湯に触れるということが防止され、追い焚き運転の安全性を高めることが可能となる。
【００４９】
図４は本発明の第４実施形態例の要部構成を示すものである。この第４実施形態例は、給湯燃焼停止後の追い焚き熱交換器内湯温の推定温度データに基づき、追い焚き循環流量の絞り制御を行うように構成した点に特徴があり、それ以外の構成は前記第３実施形態例と同様である。この第４実施形態例は、時間計測手段34と、流量制御回路35と、流量制御機構36と、データ格納部33とを有して構成される。時間計測手段34は前記第２実施形態例と同様に給湯燃焼停止時からの経過時間を計測する。
【００５０】
データ格納部33には図７に示すような給湯燃焼停止後からの追い焚き熱交換器３内の湯温の経時温度変化のデータを前記第２実施形態例と同様に格納される。流量制御機構36は前記第３実施形態例と同様に構成される。
【００５１】
流量制御回路35は、給湯燃焼停止時からの経過時間の計測結果を時間計測手段34により取り込み、その経過時間に対応する追い焚き熱交換器３内の湯温をデータ格納部33に格納されている経時温度変化のデータにより求め、この追い焚き熱交換器内湯水の推定温度とデータ格納部33に格納されている基準判定温度とを比較し、推定温度が基準判定温度よりも高いときには、第３実施形態例と同様に流量制御機構36を動作させて追い焚き循環流量を絞り制御し、追い焚き熱交換器３内の高温の湯を浴槽18に至る経路上で放熱冷却し、安全な温度に冷却して浴槽18に吐出させ、前記第３実施形態例と同様に追い焚き循環流量の絞り制御により追い焚きの安全を達成することが可能となる。
【００５２】
図５は本発明の第５実施形態例を示す要部ブロック構成図である。この図５の実線で示すブロック構成は、追い焚き熱交換器内湯温を検出する温度センサ31を用いて追い焚き運転の安全を図る構成のものであり、この構成は、前記図１に示す第１実施形態例の構成と図３に示す第３実施形態例の構成を組み合わせたものである。
【００５３】
すなわち、ポンプ駆動タイミング制御手段32と、データ格納部33の構成部分は第１実施形態例と同様であり、流量制御回路35とデータ格納部33と流量制御機構36の構成部分は図３の第３実施形態例の構成と同様であり、その重複説明は省略する。
【００５４】
この第５実施形態例において特徴的なことは、浴槽水湯温を考慮して、ポンプ駆動タイミング制御手段32による制御と、流量制御回路35による追い焚き循環流量の絞り制御を選択的に指定して動作させるように構成したことである。このため、その制御動作の選択指定を行うための追い焚きモード選択指定部40が設けられている。
【００５５】
この追い焚きモード選択指定部40には、しきい値温度と、風呂の沸き上げ目標温度である風呂設定温度の下側近傍に設けられるマイルド温度範囲が与えられている。例えば、風呂設定温度を42℃としたとき、しきい値温度は例えば35℃として与えられ、マイルド温度範囲は例えば40〜42℃として与えられる。
【００５６】
追い焚きモード選択指定部40は、風呂温度センサ21によって検出される浴槽水検出温度を取り込み、この浴槽水検出温度がしきい値温度以上のときにはポンプ駆動タイミング制御手段32による制御を指定し、浴槽水検出温度がしきい値温度未満のときには流量制御回路35による制御を指定する。さらにまた、浴槽水検出温度がマイルド温度範囲のときにはポンプ駆動タイミング制御手段32による制御動作と流量制御回路35による制御動作を共に指定する。
【００５７】
浴槽水温度がしきい値温度以上の場合には浴槽18内に人が入浴している虞があり、浴槽水温度がしきい値温度未満の場合には浴槽18に人が入浴している可能性は少ない。また、浴槽水温度が低い場合には多少熱めの湯が浴槽に入り込んでも、入浴している者に触れるまでに熱拡散して熱い湯が触れる可能性は少なくなる。
【００５８】
また、ポンプ駆動タイミング制御手段32による制御と流量制御回路35による制御を比べた場合、ポンプ駆動タイミング制御手段32による制御は追い焚き熱交換器３内の湯温が基準判定温度よりも高いときにはこれをファン通風による冷却を行って空冷停止温度まで湯温が低下してから追い焚き循環を開始するので、流量の絞り制御よりは湯温冷却の制御精度および安全性は高いものとなる。
【００５９】
この第５実施形態例では、上記の点に着目し、浴槽水温度がしきい値温度未満の場合には、流量制御回路35による流量の絞り制御によって追い焚き運転を制御させ、浴槽水温度がしきい値温度以上のときにはより湯温冷却制御精度の高いポンプ駆動タイミング制御手段32による制御によって追い焚き運転を行わせる。そして、浴槽水温度がマイルド温度範囲に入っているときには、浴槽18内に人が入っている可能性が高く、安全性に対しては十分配慮する必要があることから、第１段として、ポンプ駆動タイミング制御手段32によるファン通風を行い、湯温冷却後に追い焚き運転を開始し、さらに、第２段として、流量制御回路35により追い焚き循環流量を絞り制御する。この第１段、第２段の併用制御により、追い焚き熱交換器３内の高温の湯が浴槽18に入り込むことが完璧に防止され、追い焚き運転に対する安全は万全なものとなる。
【００６０】
この図５に示すブロック構成において、温度センサ31を時間計測手段34に置き換え、ポンプ駆動タイミング制御手段32とデータ格納部33の結合構成を前記図２の第２実施形態例の構成と同様に形成し、かつ、流量制御回路35とデータ格納部33の結合構成を前記図４に示す第４実施形態例の構成と同様に形成することにより、データ格納部33に格納される給湯燃焼停止後の追い焚き熱交換器３内湯温の経時温度データに基づきポンプ駆動タイミング制御手段32の動作と流量制御回路35の動作が行われ、上記温度センサ31を用いた制御の場合と同様に追い焚きモード選択指定部40の動作により風呂温度に応じてポンプ駆動タイミング制御手段32と流量制御回路35の動作を選択指定あるいは併用指定して追い焚き運転の安全を図ることが可能となる。
【００６１】
なお、本発明は上記各実施形態例に限定されることはなく、様々な実施の形態を採り得る。例えば、上記実施形態例の一缶二水路複合器は、湯張り機能を備えたもので説明したが、この湯張り機能を省略したものでもよい。この場合は、図８の湯張り通路24を省略したものとなる。
【００６２】
また、上記第１、第３、第５の各実施形態例における温度センサ31を用いた制御では、追い焚き熱交換器３内の検出湯温が基準判定温度よりも高いときには空冷停止温度になるまで冷却して追い焚き運転を開始させたが、空冷停止温度を設けず、基準判定温度以下に冷却したときに追い焚き運転を開始するようにしてもよく、あるいは、予め与えた所定の時間冷却した後、追い焚き運転を開始するようにしてもよい。
【００６３】
さらに、上記第５実施形態例では、追い焚きモード選択指定部40の動作判断データとして、しきい値温度とマイルド温度範囲を与えたが、その一方を省略することも可能である。マイルド温度範囲を省略した場合には、浴槽水温度がしきい値温度以上のときにはポンプ駆動タイミング制御手段32による制御を行い、浴槽水温度がしきい値温度未満の場合には流量制御回路35による制御を選択指定することになる。また、しきい値温度を省略した場合には、浴槽水温度がマイルド温度範囲に入っているときにはポンプ駆動タイミング制御手段32による制御と流量制御回路35による制御を共に併用指定して追い焚き運転を動作させ、浴槽水温度がマイルド温度範囲に達していない場合にはポンプ駆動タイミング制御手段32と流量制御回路35のいずれか一方の動作を指定して追い焚き運転を行わせるようにしてもよい。
【００６４】
さらに、上記実施形態例では、温度センサ31は追い焚き熱交換器３内の湯温を検出する専用のセンサとして設けたが、例えば、給湯温度センサ15の検出温度を間接的な追い焚き熱交換器内湯温の検出温度として採用することも可能である。
【００６５】
【発明の効果】
本発明によれば、給湯燃焼停止後追い焚き熱交換器内湯温が上昇した状態で追い焚き運転が指令されたときには、ファン通風により冷却してから追い焚き運転を開始するように構成しているので、給湯燃焼停止後にその給湯燃焼によって加熱された高温の湯が追い焚き熱交換器から浴槽に入り込むのを防止でき、浴槽内でその高温の湯に触れる危険を防止し、安全性の高い追い焚き運転を行わせることが可能となる。
【００６６】
また、ファン通風により追い焚き熱交換器内湯温が空冷停止温度まで冷却してから追い焚き運転を行わせる構成としたものにあっては、追い焚き熱交換器内湯温が十分に低い温度まで冷却された状態で追い焚き運転が開始されるので、浴槽内への高温吐出に対する安全性はさらに高いものとなる。
【００６７】
また、給湯燃焼停止後からの時間を計測し、予め与えられている追い焚き熱交換器内湯温の経時温度変化データに基づいて追い焚き熱交換器内湯温を推定して追い焚き運転の安全を図る構成のものにおいても、その追い焚き熱交換器内湯温の推定温度が基準判定温度よりも高いときには、ファン通風冷却により低い湯温にしてから追い焚き運転を開始するので、同様に、追い焚き運転の高温吐出にたいする安全を図ることが可能である。
【００６８】
さらに、流量制御回路を設け、流量制御機構を動作させて追い焚き熱交換器内検出湯温あるいは経時温度変化データに基づく推定温度が基準判定温度よりも高いときには追い焚き循環流量を絞り制御するように構成したものにおいても、この流量絞り制御により、たとえ、給湯燃焼停止時に追い焚き熱交換器内湯温が高温の湯となっても、追い焚き循環流量が絞られるために、追い焚き熱交換器側から浴槽に達する間に管路の放熱により冷却されて、安全な温度に冷却されて浴槽に入り込むため、同様に高温吐出に対する危険を防止でき、安全性の高い追い焚き運転が可能となる。
【００６９】
さらに、浴槽水温度を考慮し、しきい値温度やマイルド温度範囲を設け、これらの温度に基づきポンプ駆動タイミング制御手段によるファン通風の冷却動作と流量制御回路による追い焚き循環流量の絞り制御を選択指定あるいは併用指定する構成のものにあっては、浴槽水温度に応じて高温吐出に対する安全動作が行われるので、高温吐出に対する安全性は万全となる。
【図面の簡単な説明】
【図１】本発明の第１実施形態例の要部構成を示すブロック図である。
【図２】本発明の第２実施形態例の要部構成を示すブロック図である。
【図３】本発明の第３実施形態例の要部構成を示すブロック図である。
【図４】本発明の第４実施形態例の要部構成を示すブロック図である。
【図５】本発明の第５実施形態例の要部構成を示すブロック図である。
【図６】ダンパを用いた流量制御機構の一例を示す説明図である。
【図７】給湯燃焼停止後における追い焚き熱交換器内湯温の経時温度変化を示すグラフである。
【図８】一缶二水路複合器のシステム構成図である。
【符号の説明】
23 追い焚き循環通路
31 温度センサ
32 ポンプ駆動タイミング制御手段
33 データ格納部
34 時間計測手段
35 流量制御回路
36 流量制御機構
40 追い焚きモード選択指定部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a single-can two-water channel complex having a bath replenishment function and a hot water supply function.
[0002]
[Prior art]
In FIG. 8, the system configuration of a single can / two-water channel complex developed by the applicant is shown by a solid line. In the figure, a hot water supply heat exchanger 2 and a reheating heat exchanger 3 are integrated in the appliance case 1. That is, the hot water supply side pipe line is inserted through a plurality of common fin plates 4 to form the hot water supply heat exchanger 2, and the reheating side pipe line is similarly mounted through the fin plate 4 to reheat the heat exchanger. 3
[0003]
A burner 5 that heats the hot water supply heat exchanger 2 and the reheating heat exchanger 3 in common is disposed below the integrated heat exchanger, and a combustion fan that supplies and discharges the combustion of the burner 5. 6 is arranged on the lower side. A gas passage 9 is connected to the burner 5. The gas passage 9 has electromagnetic valves 7 and 8 for opening and closing the passage and a proportional valve 10 for controlling the amount of gas supply (burner combustion heat amount) by the valve opening amount. Is installed. The valve opening amount control of the proportional valve 10 is specifically performed by variable control of the current applied to the proportional valve 10 (valve opening drive current).
[0004]
A water supply pipe 11 is connected to the inlet side of the hot water heat exchanger 2, and the water supply pipe 11 has a water supply temperature detection sensor 12 for detecting a water supply temperature, a water supply flow rate (a hot water flow rate in the case of hot water supply). ) Is provided. The inlet side of the water supply pipe 11 is connected to a water pipe.
[0005]
A hot water supply pipe 14 is connected to the outlet side of the hot water supply heat exchanger 2, and the hot water supply pipe 14 is led to a desired hot water supply place such as a kitchen via an external pipe. A hot water supply temperature sensor 15 for detecting a hot water supply temperature is provided in the flow path on the outlet side of the hot water supply heat exchanger 2.
[0006]
One end side of the pipe line 16 is connected to the inlet side of the reheating heat exchanger 3, and the other end side of the pipe line 16 is connected to the discharge side of the circulation pump 17. The suction side of the circulation pump 17 and the bathtub 18 are connected by a return pipe 20, and the return pipe 20 is provided with a bath temperature sensor 21 that detects the temperature of the circulating hot water in the bathtub 18 as a bath temperature. One end side of the forward pipe 22 is connected to the outlet side of the reheating heat exchanger 3, and the other end side of the forward pipe 22 is connected to the bathtub 18, and the circulation pump 17 is connected from the bathtub 18 through the return pipe 20. A passage that reaches the bathtub 18 through the pipe line 16, the reheating heat exchanger 3, and the outgoing line 22 constitutes a recirculation circulation path 23.
[0007]
The hot water supply pipe 14 of the hot water supply heat exchanger 2 functions as a hot water supply passage, and the hot water supply pipe 14 and the recirculation circulation passage 23 (the pipe 16 in FIG. 8) are connected in communication by a hot water filling passage 24. A pouring valve 25 constituted by an electromagnetic valve or the like for opening and closing the passage is interposed in the tension passage 24, and the water level of the bathtub 18 is detected by water pressure in the hot-water passage 24 downstream of the pouring valve 25. A water level sensor (pressure sensor) 26 is provided.
[0008]
Sensor detection signals such as the flow rate detection sensor 13, the temperature sensors 12, 15, 21 and the water level sensor 26 are applied to a control device 27, and a remote control 28 is connected to the control device 27. The remote control 28 is provided with a hot water supply temperature setting means for setting the hot water supply temperature, a bath temperature setting means for setting the bath temperature, a button for instructing a hot water filling operation, a display unit for displaying necessary information, and the like. .
[0009]
The control device 27 takes in various sensor detection signals and information from the remote controller 28, and controls the hot water supply operation, the hot water filling operation, and the reheating operation as follows according to a sequence program provided therein.
[0010]
For example, when the faucet 30 of the hot water supply passage led to the kitchen or the like is opened and the operation flow rate is detected by the flow rate detection sensor 13, the combustion fan 6 is rotated and the solenoid valves 7 and 8 are opened. Then, the fuel gas is supplied to the burner 5 and the burner 5 is combusted by a point ignition means (not shown), so that the hot water temperature detected by the hot water temperature sensor 15 becomes the hot water set temperature set by the remote controller 28. The valve opening drive current to the proportional valve 10 is controlled so as to match, and the water passing through the hot water supply heat exchanger 2 is heated by the flame of the burner 5 to produce hot water of a set temperature, and this hot water is supplied through the hot water supply pipe 14. Hot water is supplied to the hot water supply location.
[0011]
When the faucet 30 is closed and an off signal is output from the flow rate detection sensor 13, the burner combustion is stopped and the operation of the hot water supply operation mode is ended.
[0012]
Further, when the hot water filling operation mode is commanded by the remote controller 28, the pouring valve 25 is opened. When the operating flow rate is detected by the flow rate detection sensor 13, combustion of the burner 5 starts in the same manner as in the hot water supply operation, and hot water produced by the hot water supply heat exchanger 2 passes through the hot water supply pipe 14 and the hot water filling passage 24. The hot water is dropped into the bathtub 18 from both sides of the passage passing the outgoing pipe 22 and the passage passing the return pipe 20 through the heat exchanger 3 after diverging further from the pipe 16. Then, when the amount of hot water up to the set water level is dropped or when the set water level is detected by the water level sensor 26, the hot water solenoid valve 25 is closed and the combustion of the burner 5 is stopped, and the hot water filling operation mode is set. The operation ends.
[0013]
In the reheating operation mode, the circulation pump 17 is driven to rotate with the pouring valve 25 closed, and the hot water in the bathtub 18 is circulated through the recirculation circulation passage 23, so that the bath temperature The bath temperature of the bathtub is detected by the sensor 21. When the bath detection temperature is lower than the bath set temperature, the burner 5 is combusted, and the bath water circulating through the recirculation circulation passage 23 is reheated and heated by the heat exchanger 3. When the bath temperature sensor 21 detects that the temperature of the bath water has reached the bath set temperature, the circulation pump 17 and the burner 5 are stopped, and the operation in the reheating operation mode is finished.
[0014]
As described above, the single can two-water channel complex is a system for heating the hot water supply heat exchanger 2 and the reheating heat exchanger 3 which are integrated by using a common burner 5, so that the hot water supply heat exchange provided separately is provided. Compared to the method in which the heater and the reheating heat exchanger are each heated by combustion using separate burners, the device configuration can be simplified, and accordingly, the device (instrument) can be reduced in size and cost.
[0015]
[Problems to be solved by the invention]
However, since the hot water supply heat exchanger 2 and the reheating heat exchanger 3 are integrated and combusted and heated by the common burner 5, for example, the circulation pump 17 is driven immediately after the hot water supply operation is completed. When the sowing operation is performed, immediately after the hot water supply combustion, the hot water in the reheating heat exchanger 3 heated by the hot water combustion becomes a high temperature due to the combustion heating of the burner 5, and even after the hot water combustion is stopped, Since the amount of heat held in the can of the heat exchanger 3 is transferred to the reheating heat exchanger hot water, the reheating heat exchanger temperature becomes high just before boiling in extreme cases, and this hot water circulates. Immediately after the rotation of the pump 17, there was a risk that the bather 18 entered the bathtub 18 and touched the hot water.
[0016]
The present invention can prevent the danger of hot water in a reheating heat exchanger heated to a high temperature by hot water combustion entering the bathtub even when a reheating command is issued immediately after the hot water combustion operation. The object is to provide a single can / two channel composite device with high safety.
[0017]
[Means for Solving the Problems]
In order to achieve the above object, the present invention takes the following measures. That is, the first invention is incorporated in a hot water supply heat exchanger that heats water supplied from the water supply passage and sends it to the hot water supply passage, and a recirculation circulation passage that is equipped with a circulation pump. A reheating heat exchanger for recirculating circulating hot water is integrated, and the integrated hot water supply heat exchanger and reheating heat exchanger are combined with a common burner using air supplied by a combustion fan. In the one-bore two-channel complex having a combustion heating method, a temperature sensor for directly or indirectly detecting the temperature of the hot water in the reheating heat exchanger is provided, and a reheating command is provided after the hot water supply combustion of the burner is stopped. When the detected temperature taken in from the temperature sensor is higher than a predetermined reference determination temperature, the combustion fan is driven prior to the circulation pump being driven. And a means for solving the problems with the construction of the pump drive timing control means for performing reheating driving of the circulation pump the reheating heat exchanger molten steel temperature by the fan air is cooled is provided.
[0018]
The second aspect of the present invention is incorporated in a hot water supply heat exchanger that heats water supplied from the water supply passage and sends it to the hot water supply passage, and is recirculated by driving of the circulation pump that is incorporated in the recirculation circulation passage of bathtub hot water provided with a circulation pump. A reheating heat exchanger that recirculates the circulating hot water is integrated, and the integrated hot water supply heat exchanger and reheating heat exchanger are combusted and heated by a common burner using air supplied by a combustion fan. Temperature measurement means that measures the time after hot water combustion stops, and the temperature data of the change over time of the internal hot water temperature due to the reheating heat effect after hot water combustion stop In the reheating heat exchanger corresponding to the passage of time since the hot water combustion stop when the reheating command is applied after the hot water combustion of the burner is stopped. An estimated temperature is obtained from the temperature change data of the data storage unit, and when the obtained estimated temperature is higher than a predetermined reference determination temperature, the combustion fan is driven prior to driving the circulation pump. The pump drive timing control means for driving the circulation pump after the reheating heat exchanger internal temperature is cooled by fan ventilation is used as means for solving the problem.
[0019]
In a third aspect of the invention having the configuration of the first or second aspect of the invention, the air cooling stop temperature is given to a lower temperature side than the reference determination temperature, and the pump drive timing control means drives the combustion fan. It is a means to solve the problem by adopting a configuration in which the recirculation pump is driven when it is determined that the hot water temperature in the reheating heat exchanger has dropped below the air cooling stop temperature due to the fan ventilation.
[0020]
In a fourth aspect of the present invention, a hot water supply heat exchanger that heats water supplied from the water supply passage and sends it to the hot water supply passage, and a hot water supply recirculation passage having a circulation pump, is circulated by driving the circulation pump. A reheating heat exchanger that recirculates the circulating hot water is integrated, and the integrated hot water supply heat exchanger and reheating heat exchanger are combusted and heated by a common burner using air supplied by a combustion fan. In the one-can / two-channel complex, the temperature sensor that directly or indirectly detects the temperature of the hot water in the reheating heat exchanger is provided, and the flow rate of the circulating hot water is controlled in the recirculation circulation passage. The flow rate control mechanism is provided, and the detected temperature taken in from the temperature sensor when the reheating command is applied after the hot water supply combustion of the burner is stopped is higher than the reference determination temperature given in advance. As a means for solving the problem, the flow control circuit is provided with a flow rate control circuit that controls the flow rate control mechanism to control the flow rate of the recirculated hot water circulated by driving the circulation pump in accordance with data given in advance. Yes.
[0021]
A fifth invention is incorporated in a hot water supply heat exchanger for heating and supplying water supplied from a water supply passage to the hot water supply passage and a recirculation circulation passage for bathtub hot water provided with a circulation pump, and circulates by driving of the circulation pump. A reheating heat exchanger that recirculates the circulating hot water is integrated, and the integrated hot water supply heat exchanger and reheating heat exchanger are combusted and heated by a common burner using air supplied by a combustion fan. Temperature measurement means that measures the time after hot water combustion stops, and the temperature data of the change over time of the internal hot water temperature due to the reheating heat effect after hot water combustion stop In the reheating heat exchanger corresponding to the passage of time since the hot water combustion stop when the reheating command is applied after the hot water combustion of the burner is stopped. The flow rate of the recirculated hot water circulated by driving the circulation pump when the estimated temperature of the temperature is obtained from the temperature data of the temporal change in the data storage unit and the obtained estimated temperature is higher than a predetermined reference determination temperature. The means for solving the problems is provided with a flow rate control circuit that controls the flow rate control mechanism and performs throttle control according to data given in advance.
[0022]
6th invention is the bath temperature sensor which detects the hot-water temperature in a bathtub, and the reheating drive after cooling the hot-water temperature in a reheating heat exchanger by fan ventilation, The revolving drive of Claim 1 or Claim 2 or Claim 3 6. A bathtub that is provided with a pump drive timing control means and a flow rate control circuit according to claim 4 or 5 for controlling the flow rate of recirculating hot water by controlling the flow rate control mechanism to control the flow rate, and detected by the bath temperature sensor. When the internal hot water temperature is equal to or higher than a threshold temperature given in advance, the pump drive timing control means is operated to recharge, and when the hot water temperature in the bathtub is lower than the threshold temperature, the flow control circuit is operated. In other words, the configuration is provided with a rebirth mode selection / designating unit for rebirth.
[0023]
The seventh invention has the configuration of the sixth invention, and a mild temperature range is provided in the vicinity of the lower side of the bath set temperature, which is a bath boiling target temperature. Means for solving the problem by having a configuration in which the pump drive timing control means and the flow rate control circuit are operated together when the hot water temperature in the bathtub detected by the bath temperature sensor is within the mild temperature range. It is said.
[0024]
In the configuration of the above invention, when a reheating operation is instructed immediately after the hot water supply combustion is stopped, a temperature sensor for detecting the reheating heat exchanger hot water temperature is provided. When the hot water temperature in the heat exchanger is detected and the detected hot water temperature is higher than a predetermined reference determination temperature, the combustion fan is forcibly driven to rotate, and the reheating heat exchanger is cooled by air. After circulating the hot water temperature in the heat exchanger, the circulation pump is driven again.
[0025]
In addition, in the configuration in which the data of the temperature change with the passage of time with the passage of time of the reheating heat exchanger temperature after the hot water supply combustion stop is given in advance, the time immediately after the hot water supply combustion stop is time measuring means When the reheating heat exchanger hot water temperature corresponding to the passage of time is read from the data of the temperature change with time, and the read temperature data is higher than the reference judgment temperature given in advance, the circulation pump Prior to this drive, the combustion fan is driven to rotate, and cooling is performed by fan ventilation of the reheating heat exchanger. After this cooling, the circulation pump is driven to perform reheating operation.
[0026]
As described above, in the present invention, when a reheating operation is commanded immediately after the hot water combustion, the hot water temperature in the reheating heat exchanger is obtained by detection by the temperature sensor or based on the data of the temperature change with time, When the temperature is higher than the reference judgment temperature, the recirculation pump is driven after cooling and the reheating operation is started so that hot water in the reheating heat exchanger immediately after hot water combustion is prevented from entering the bathtub. As a result, it is possible to perform a chasing operation with high safety, thereby achieving the object of the present invention.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention are described below with reference to the drawings. FIG. 1 shows a main configuration of a first embodiment of the present invention, which includes a temperature sensor 31, a pump drive timing control means 32, and a data storage unit 33. As shown by a chain line in FIG. 8, the temperature sensor 31 is provided in the reheating heat exchanger 3 and detects the hot water temperature in the reheating heat exchanger 3. The system configuration of the single can two-channel composite device of this embodiment is the same as that shown by the solid line in FIG. 8 except that the reheating heat exchanger 3 is provided with the temperature sensor 31. The same reference numerals are given, and redundant explanations are omitted. The pump drive timing control means 32 and the data storage unit 33 are provided in the control device 27. The data storage unit 33 stores the reference judgment temperature and air cooling stop temperature data as shown in FIG. Yes.
[0028]
FIG. 7 shows temperature change data of the hot water temperature in the reheating heat exchanger 3 with the passage of time from the hot water combustion stop. As is apparent from this figure, during hot water combustion, the reheating heat exchanger 3 is simultaneously heated by burner combustion of the hot water supply, so that the hot water temperature in the reheating heat exchanger 3 becomes higher than the bath set temperature. Immediately after the hot water supply combustion is stopped, the heat accumulated in the reheating heat exchanger is further transferred to the accumulated hot water in the reheating heat exchanger by burner combustion, and the hot water temperature in the reheating heat exchanger 3 is transferred. Shows a phenomenon in which the temperature of the hot water in the reheating heat exchanger 3 is gradually lowered due to the natural heat-cooling and then the amount of heat held in the reheating heat exchanger 3 is radiated. The reference judgment temperature may be dangerous when hot water having a temperature higher than that is dropped into the bathtub 18 from the inside of the heat exchanger 3. If the temperature is lower than that, it may be dangerous. For example, the reference judgment temperature is given as a value of 50 ° C. with respect to a bath setting temperature of 42 ° C. at a boundary temperature that is considered to have no property.
[0029]
The air cooling stop temperature is given at a temperature slightly higher than the bath set temperature (for example, 43 ° C.) (Of course, the air cooling stop temperature can be given at a temperature lower than the bath set temperature). This air-cooling stop temperature is given as a safe temperature value that does not pose any danger even when hot water at that temperature enters the bathtub 18.
[0030]
The pump drive timing control means 32 takes in the detected value of the hot water temperature in the reheating heat exchanger 3 from the temperature sensor 31 and stores it in the data storage unit 33 when a reheating command is applied after the hot water supply combustion is stopped. Compare with the reference judgment temperature. If the detected temperature of the hot water temperature in the reheating heat exchanger is higher than the reference determination temperature, the combustion fan 6 is rotationally driven prior to the reheating operation by driving the circulation pump 17 to regenerate heat exchange. Air cooling is performed by ventilating the fan 3
[0031]
Then, while the combustion fan 6 is being driven, the detected temperature of the temperature sensor 31 is taken in every moment, and the detected temperature of the temperature sensor 31 is compared with the reference determination temperature and the air cooling stop temperature. Then, when the temperature detected by the temperature sensor 31 reaches the air cooling stop temperature, the circulation pump 17 is driven to start the reheating operation.
[0032]
In the first embodiment, after the hot water supply combustion is stopped, if the hot water temperature in the reheating heat exchanger 3 is higher than the reference judgment temperature at which there is a risk of danger, the reheating operation is not performed immediately, and the combustion fan 6 The hot water in the reheating heat exchanger 3 is driven to air-cool, and the recirculation pump 17 is driven to start the reheating operation only when it is cooled to a safe air cooling stop temperature. The hot water in the reheating heat exchanger that has become hot water due to the heat does not enter the bathtub 18, and the risk that a person bathing in the bathtub 18 may get burned by touching the hot water is completely avoided, It becomes possible to carry out a driving operation with high safety.
[0033]
FIG. 2 is a block diagram showing the principal part of a second embodiment of the present invention. In the second embodiment, the hot water temperature in the reheating heat exchanger 3 is not detected by the temperature sensor 31, but the hot water temperature in the reheating heat exchanger is estimated based on data given in advance, and the hot water temperature in the reheating heat exchanger 3 is detected. The other features are the same as those in the first embodiment.
[0034]
The characteristic configuration of the second embodiment includes a time measuring unit 34, a pump drive timing control unit 32, and a data storage unit 33.
[0035]
In addition to the reference determination temperature and the air cooling stop temperature, the data storage unit 33 stores time-dependent temperature change data of the hot water temperature in the reheating heat exchanger 3 after the hot water supply combustion stop as shown in FIG. Has been. This time-dependent temperature change data includes at least one of hot water combustion heat quantity, the size (heat capacity) of the heat exchanger can body in which the hot water heat exchanger 2 and the reheating heat exchanger 3 are integrated, and the outside air temperature. Taking these parameters into consideration, the time-dependent changes in the temperature of the accumulated hot water in the reheating heat exchanger 3 over time are obtained in advance by experiments and the like. It is stored in the data storage unit 33 as temperature-dependent temperature change data.
[0036]
Further, the data storage unit 33 stores temperature change data due to cooling of fan ventilation. The temperature change data due to the cooling of the fan ventilation is obtained by measuring the temperature change of the hot water in the heat exchanger by experiment or the like when the fan air volume of the combustion fan 6 is passed through the reheating heat exchanger 3 and tracking this. It is stored in the data storage unit 33 as cooling temperature data of the hot water temperature in the soaking heat exchanger 3.
[0037]
The time measuring means 34 measures the elapsed time from when hot water combustion is stopped, and adds the time measurement result to the pump drive timing control means 32.
[0038]
The pump drive timing control means 32 receives the time measurement signal of the time measurement means 34, compares it with the data of the temperature change with time stored in the data storage unit 33, and replenishes the change corresponding to the passage of time from the time of hot water combustion stop. The temperature of the hot water in the heat exchanger is obtained from the temperature change data over time, and the temperature data of the hot water in the reheating heat exchanger is estimated.
[0039]
Then, when the reheating command is issued, the estimated temperature of the reheating heat exchanger hot water temperature with the elapse of time is compared with the reference determination temperature given to the data storage unit 33, and the estimated temperature is When the temperature is higher than the reference determination temperature, the combustion fan 6 is driven and the reheating heat exchanger 3 is air-cooled by fan ventilation as in the first embodiment. When it is determined that the hot water temperature in the reheating heat exchanger has decreased to the air cooling stop temperature based on the cooling temperature data of the hot water temperature in the reheating heat exchanger 3 due to the fan air cooling, the circulation pump 17 is driven. And drive them up.
[0040]
Also in the second embodiment, when it is determined that the estimated hot water temperature in the reheating heat exchanger 3 is higher than the reference determination temperature, the hot air temperature in the reheating heat exchanger 3 is generated by the fan ventilation of the combustion fan 6. Is cooled to the air cooling stop temperature, and thereafter, the circulation pump 17 is driven to perform the reheating operation, so that the temperature becomes high due to the hot water supply combustion as in the first embodiment. The hot water in the reheating heat exchanger 3 does not enter the bathtub 18, and reheating operation with high safety becomes possible.
[0041]
FIG. 3 is a block diagram showing a third embodiment of the present invention. In the third embodiment, the hot water in the reheating heat exchanger 3 heated by hot water combustion is not cooled by the combustion fan 6 but the flow amount of the recirculating hot water is reduced to reduce the reheating heat exchanger 3. It is characterized in that the hot water inside is controlled so as not to enter the bathtub 18, and the other configuration is the same as that of the first embodiment.
[0042]
The characteristic configuration of the third embodiment includes a temperature sensor 31 for detecting the hot water temperature in the reheating heat exchanger 3, a flow rate control circuit 35, a flow rate control mechanism 36, and a data storage unit 33. Configured. The flow rate control mechanism 36 is a mechanism for controlling the flow rate of the circulating hot water circulating in the recirculation circulation passage 23 when performing reheating circulation of the bath, and this flow rate control mechanism is configured using appropriate means, for example, As shown in FIG. 6, a damper 37 for controlling the flow rate is provided in the recirculation circulation passage 23, and a mechanism for restricting the flow rate in the recirculation circulation passage 23 by rotating the rotating shaft 38 of the damper 37 is configured. Alternatively, by controlling the pump rotation of the circulation pump 17 shown in FIG. 8 and lowering the pump rotation speed, the flow rate circulating in the recirculation circulation passage 23 can be reduced. The flow rate control mechanism is configured by appropriate means.
[0043]
The data storage unit 33 stores a reference determination temperature similar to that in the first embodiment.
[0044]
After the hot water supply combustion is stopped, the flow control circuit 35 takes in the detected value of the hot water temperature in the reheating heat exchanger of the temperature sensor 31 and the reference determination stored in the reheating heat exchanger detected hot water temperature and the data storage unit 33. When the detected temperature at the time of the reheating command is higher than the reference determination temperature, the flow rate control mechanism 36 is operated to control the flow rate of the circulating hot water in the recirculation circulation passage.
[0045]
Even if the hot water temperature in the reheating heat exchanger 3 is high due to the flow restriction control of the flow control circuit 35, the recirculation flow rate is reduced. Heat is dissipated along the path from the reheating heat exchanger 3 to the bathtub 18, and by reaching the bathtub 18, the hot water is touched in the bathtub 18 in order to enter the bathtub 18 at a temperature lower than the reference judgment temperature. This eliminates the danger of being repulsed and makes it safe to reap.
[0046]
The flow rate control circuit 35 samples the temperature detected by the temperature sensor 31 every time while operating the flow rate control mechanism 36 to control the recirculation circulation flow rate, and reheating the heat exchanger 3 by hot water combustion. When all of the hot water inside is supplied to the bathtub 18 side and the temperature detected by the temperature sensor 31 falls below the reference determination temperature, or when the temperature falls to a temperature corresponding to the air cooling stop temperature in the first embodiment. In addition, the throttle operation of the flow rate control mechanism 36 is stopped, the recirculation flow rate is returned to the original steady flow rate, and the recirculation operation is performed.
[0047]
The flow rate control circuit 35 is configured to restrict the flow rate by a predetermined amount when the reheating heat exchanger internal hot water temperature detected by the temperature sensor 31 is higher than the reference determination temperature. Alternatively, the flow rate may be throttled by an amount proportional to the temperature increase with respect to the reference determination temperature, and the flow rate throttle control mode is appropriately set.
[0048]
Also in this third embodiment, when the reheating operation is performed after the hot water supply combustion is stopped, even if the hot water in the reheating heat exchanger becomes high temperature due to the hot water supply combustion, When the hot water is detected, the recirculation flow rate is throttled and controlled, and before reaching the bathtub 18, it enters the bathtub at a temperature cooled by diffusion of heat radiation from the pipeline. In this way, it is possible to prevent the hot water from being touched and to improve the safety of the chasing operation.
[0049]
FIG. 4 shows a main configuration of the fourth embodiment of the present invention. The fourth embodiment is characterized in that the throttle control of the recirculation circulation flow rate is performed based on the estimated temperature data of the reheating heat exchanger internal hot water temperature after the hot water supply combustion is stopped. Is the same as in the third embodiment. The fourth embodiment includes a time measuring unit 34, a flow rate control circuit 35, a flow rate control mechanism 36, and a data storage unit 33. The time measuring means 34 measures the elapsed time since the hot water supply combustion stop as in the second embodiment.
[0050]
In the data storage unit 33, data of the temperature change with time of the hot water temperature in the reheating heat exchanger 3 after the hot water supply combustion stop as shown in FIG. 7 is stored in the same manner as in the second embodiment. The flow rate control mechanism 36 is configured in the same manner as in the third embodiment.
[0051]
The flow rate control circuit 35 fetches the measurement result of the elapsed time from when the hot water supply combustion is stopped by the time measuring means 34, and the hot water temperature in the reheating heat exchanger 3 corresponding to the elapsed time is stored in the data storage unit 33. The estimated temperature of the reheating heat exchanger is compared with the reference determination temperature stored in the data storage unit 33, and the estimated temperature is higher than the reference determination temperature. As in the third embodiment, the recirculation flow rate is controlled by operating the flow control mechanism 36, and hot water in the reheating heat exchanger 3 is radiated and cooled on the path to the bathtub 18 to provide a safe temperature. It is possible to achieve cooling safety by controlling the recirculation flow rate in the same manner as in the third embodiment.
[0052]
FIG. 5 is a block diagram showing the principal part of a fifth embodiment of the present invention. The block configuration shown by the solid line in FIG. 5 is a configuration for ensuring the safety of the reheating operation by using the temperature sensor 31 that detects the hot water temperature in the reheating heat exchanger. This configuration is the same as that shown in FIG. The configuration of the first embodiment is combined with the configuration of the third embodiment shown in FIG.
[0053]
That is, the components of the pump drive timing control means 32 and the data storage unit 33 are the same as those in the first embodiment, and the components of the flow rate control circuit 35, the data storage unit 33, and the flow rate control mechanism 36 are the same as those shown in FIG. The configuration is the same as that of the third embodiment, and a duplicate description thereof is omitted.
[0054]
What is characteristic in the fifth embodiment is that the control by the pump drive timing control means 32 and the control of the recirculation circulation flow rate by the flow rate control circuit 35 are selectively designated in consideration of the bath water temperature. Is configured to operate. For this reason, a repulse mode selection / designation unit 40 is provided for performing designation / designation of the control operation.
[0055]
The reheating mode selection / designating unit 40 is provided with a threshold temperature and a mild temperature range provided near the lower side of the bath set temperature, which is the bath boiling target temperature. For example, when the bath set temperature is 42 ° C., the threshold temperature is given as 35 ° C., for example, and the mild temperature range is given as 40 to 42 ° C., for example.
[0056]
The reheating mode selection designating unit 40 takes in the bath water detection temperature detected by the bath temperature sensor 21, and designates control by the pump drive timing control means 32 when the bath water detection temperature is equal to or higher than the threshold temperature. When the water detection temperature is lower than the threshold temperature, control by the flow control circuit 35 is designated. Furthermore, when the bath water detection temperature is in the mild temperature range, both the control operation by the pump drive timing control means 32 and the control operation by the flow rate control circuit 35 are designated.
[0057]
If the bath water temperature is equal to or higher than the threshold temperature, there may be a person bathing in the bathtub 18, and if the bath water temperature is lower than the threshold temperature, a person may be bathing in the bathtub 18. There is little nature. In addition, when the bath water temperature is low, even if some hot water enters the bathtub, the possibility that the hot water is diffused and touched by the time the bather is touched decreases.
[0058]
Further, when the control by the pump drive timing control means 32 and the control by the flow rate control circuit 35 are compared, the control by the pump drive timing control means 32 is performed when the hot water temperature in the reheating heat exchanger 3 is higher than the reference determination temperature. Since the recirculation is started after the hot water is cooled to the air cooling stop temperature by cooling with the fan ventilation, the control accuracy and safety of the hot water cooling are higher than the control of the flow rate.
[0059]
In the fifth embodiment, paying attention to the above points, when the bath water temperature is lower than the threshold temperature, the reheating operation is controlled by the flow rate control by the flow rate control circuit 35, and the bath water temperature is When the temperature is equal to or higher than the threshold temperature, the reheating operation is performed under the control of the pump drive timing control means 32 with higher hot water cooling control accuracy. When the bathtub water temperature is in the mild temperature range, there is a high possibility that a person is in the bathtub 18 and it is necessary to give sufficient consideration to safety. The fan is ventilated by the drive timing control means 32, the reheating operation is started after the hot water is cooled, and the recirculation flow rate is controlled by the flow rate control circuit 35 as the second stage. By the combined control of the first stage and the second stage, the hot water in the reheating heat exchanger 3 is completely prevented from entering the bathtub 18, and the safety for reheating operation is fully secured.
[0060]
In the block configuration shown in FIG. 5, the temperature sensor 31 is replaced with a time measuring unit 34, and the combined configuration of the pump drive timing control unit 32 and the data storage unit 33 is formed in the same manner as the configuration of the second embodiment of FIG. In addition, the combined configuration of the flow rate control circuit 35 and the data storage unit 33 is formed in the same manner as the configuration of the fourth embodiment shown in FIG. The operation of the pump drive timing control means 32 and the operation of the flow rate control circuit 35 are performed on the basis of the time-lapse temperature data of the hot water temperature in the reheating heat exchanger 3, and the reheating mode is selected in the same manner as in the control using the temperature sensor 31 With the operation of the designation unit 40, the operation of the pump drive timing control means 32 and the flow rate control circuit 35 can be selected or designated in combination according to the bath temperature, and the safety of the reheating operation can be achieved.
[0061]
The present invention is not limited to the above embodiments, and various embodiments can be adopted. For example, the one-can two-water channel complex of the above embodiment has been described as having a hot water filling function, but the hot water filling function may be omitted. In this case, the hot water filling passage 24 in FIG. 8 is omitted.
[0062]
Further, in the control using the temperature sensor 31 in each of the first, third, and fifth embodiments, the air cooling stop temperature is reached when the detected hot water temperature in the reheating heat exchanger 3 is higher than the reference determination temperature. The reheating operation is started by cooling to the temperature, but the air cooling stop temperature is not provided, and the reheating operation may be started when the air is cooled below the reference determination temperature, or cooling for a predetermined time given in advance. After that, the chasing operation may be started.
[0063]
Further, in the fifth embodiment, the threshold temperature and the mild temperature range are given as the operation determination data of the follow-up mode selection / designation unit 40, but one of them can be omitted. When the mild temperature range is omitted, control by the pump drive timing control means 32 is performed when the bath water temperature is equal to or higher than the threshold temperature, and when the bath water temperature is lower than the threshold temperature, the flow rate control circuit 35 is used. Control will be selected and specified. When the threshold temperature is omitted, when the bath water temperature is in the mild temperature range, both the control by the pump drive timing control means 32 and the control by the flow rate control circuit 35 are specified together to perform the reheating operation. When the bath water temperature does not reach the mild temperature range, either the pump drive timing control means 32 or the flow rate control circuit 35 may be designated and the reheating operation may be performed.
[0064]
Further, in the above embodiment, the temperature sensor 31 is provided as a dedicated sensor for detecting the hot water temperature in the reheating heat exchanger 3, but for example, the temperature detected by the hot water supply temperature sensor 15 is indirectly reheated. It can also be employed as a temperature for detecting the temperature of the hot water inside the vessel.
[0065]
【The invention's effect】
According to the present invention, when the reheating operation is instructed in a state where the hot water temperature in the reheating heat exchanger has risen after the hot water supply combustion is stopped, the reheating operation is started after cooling by the fan ventilation. After hot water combustion is stopped, hot water heated by the hot water combustion can be prevented from flowing into the bathtub from the reheating heat exchanger, and the danger of touching the hot water in the bathtub can be prevented. It becomes possible to drive.
[0066]
In addition, in a configuration in which the reheating operation is performed after the hot water temperature in the reheating heat exchanger is cooled to the air cooling stop temperature by fan ventilation, the reheating heat in the reheating heat exchanger is cooled to a sufficiently low temperature. Since the chasing operation is started in the state of being performed, the safety against high temperature discharge into the bathtub is further increased.
[0067]
In addition, the time after the hot water supply combustion stop is measured, and the hot water temperature in the reheating heat exchanger is estimated based on the time-dependent temperature change data of the reheating heat exchanger temperature given in advance to make the reheating operation safe. Even when the estimated temperature of the reheating heat exchanger hot water is higher than the reference determination temperature, the reheating operation is started after the temperature of the hot water is lowered by cooling with fan ventilation. It is possible to ensure safety against high temperature discharge during operation.
[0068]
Further, a flow rate control circuit is provided to operate the flow rate control mechanism to control the recirculation circulation flow rate when the estimated temperature based on the detected hot water temperature in the reheating heat exchanger or the temperature change data is higher than the reference determination temperature. In this configuration, the recirculation heat flow exchanger controls the recirculation flow rate even if the hot water temperature in the reheating heat exchanger becomes hot when the hot water supply combustion is stopped. Since it is cooled by the heat radiation of the pipe line while reaching the bathtub from the side and cooled to a safe temperature and enters the bathtub, the danger of high temperature discharge can be similarly prevented, and a highly safe reheating operation is possible.
[0069]
In addition, considering the bath water temperature, threshold temperature and mild temperature ranges are set, and based on these temperatures, the fan ventilation cooling operation by the pump drive timing control means and the recirculation flow control throttle control by the flow control circuit are selected. In the configuration that is designated or used together, the safety operation against the high temperature discharge is performed according to the bath water temperature, so the safety against the high temperature discharge is perfect.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a main configuration of a first embodiment of the present invention.
FIG. 2 is a block diagram showing a main configuration of a second embodiment of the present invention.
FIG. 3 is a block diagram showing a main configuration of a third embodiment of the present invention.
FIG. 4 is a block diagram showing a main configuration of a fourth embodiment of the present invention.
FIG. 5 is a block diagram showing a main configuration of a fifth embodiment of the present invention.
FIG. 6 is an explanatory view showing an example of a flow rate control mechanism using a damper.
FIG. 7 is a graph showing a change with time in hot water temperature in a reheating heat exchanger after hot water combustion is stopped.
FIG. 8 is a system configuration diagram of a single can / two water channel composite device.
[Explanation of symbols]
23 Recirculation circulation passage
31 Temperature sensor
32 Pump drive timing control means
33 Data storage
34 Time measurement means
35 Flow control circuit
36 Flow control mechanism
40 Tracking mode selection specification section

Claims

A hot water supply heat exchanger that heats the water supplied from the water supply passage and sends it to the hot water supply passage, and a recuperation of the hot water in the bathtub equipped with a circulation pump. The reheating heat exchanger to be integrated is integrated, and the integrated hot water supply heat exchanger and reheating heat exchanger are burned and heated by a common burner using air supplied by a combustion fan. In the water channel complex, a temperature sensor for directly or indirectly detecting the temperature of the hot water in the reheating heat exchanger is provided, and the temperature when the reheating command is applied after the hot water combustion of the burner is stopped. When the detected temperature taken in from the sensor is higher than a reference judgment temperature given in advance, the combustion fan is driven prior to the driving of the circulation pump and the fan is ventilated. A can two waterways combiner pump drive timing control means for performing reheating driving of the circulation pump heat exchanger indoor bath temperature is cooled is provided.

A hot water supply heat exchanger that heats the water supplied from the water supply passage and sends it to the hot water supply passage, and a recuperation of the hot water in the bathtub equipped with a circulation pump. The reheating heat exchanger to be integrated is integrated, and the integrated hot water supply heat exchanger and reheating heat exchanger are burned and heated by a common burner using air supplied by a combustion fan. In the water channel complex, a time measuring means for measuring the time after the hot water supply combustion is stopped, and a data storage unit having temperature data of change over time with the passage of time of the hot water temperature in the reheating heat exchanger after the hot water supply combustion is stopped; The estimated temperature of the hot water temperature in the reheating heat exchanger corresponding to the passage of time from the time when the hot water supply combustion was stopped when the reheating command was applied after the hot water supply combustion of the burner was stopped. It is obtained from the temperature change data of the data storage unit, and when the estimated temperature obtained is higher than a reference judgment temperature given in advance, the combustion fan is driven prior to driving the circulation pump, and the fan is driven by ventilation. A one-can two-water channel complex provided with pump drive timing control means for driving the circulation pump after the hot water in the heat exchanger is cooled.

The air cooling stop temperature is given to the lower temperature side than the reference judgment temperature, and the pump drive timing control means drives the combustion fan and repels it by fan ventilation, and judges that the hot water temperature in the heat exchanger has dropped below the air cooling stop temperature. 3. A can / two-channel composite device according to claim 1 or 2, wherein the circulation pump is sometimes driven up and down.

A hot water supply heat exchanger that heats the water supplied from the water supply passage and sends it to the hot water supply passage, and a recuperation of the hot water in the bathtub equipped with a circulation pump. The reheating heat exchanger to be integrated is integrated, and the integrated hot water supply heat exchanger and reheating heat exchanger are burned and heated by a common burner using air supplied by a combustion fan. In the water channel complex, a temperature sensor for directly or indirectly detecting the temperature of the hot water in the reheating heat exchanger is provided, and a flow rate control mechanism for controlling the flow rate of the circulating hot water is provided in the reheating circulation passage. If the detected temperature taken in from the temperature sensor is higher than a reference judgment temperature given in advance when a reheating command is applied after the hot water supply combustion of the burner is stopped, A can two waterways combiner flow control circuit for controlling the diaphragm in accordance with data given the flow rate of reheating the circulating hot water circulated in advance by controlling the flow rate control mechanism by the driving of the pump is provided.

A hot water supply heat exchanger that heats the water supplied from the water supply passage and sends it to the hot water supply passage, and a recuperation of the hot water in the bathtub equipped with a circulation pump. The reheating heat exchanger to be integrated is integrated, and the integrated hot water supply heat exchanger and reheating heat exchanger are burned and heated by a common burner using air supplied by a combustion fan. In the water channel complex, a time measuring means for measuring the time after the hot water supply combustion is stopped, and a data storage unit having temperature data of change over time with the passage of time of the hot water temperature in the reheating heat exchanger after the hot water supply combustion is stopped; The estimated temperature of the hot water temperature in the reheating heat exchanger corresponding to the passage of time from the time when the hot water supply combustion was stopped when the reheating command was applied after the hot water supply combustion of the burner was stopped. The flow rate control mechanism determines the flow rate of the recirculating hot water circulated by driving the circulation pump when the estimated temperature obtained from the temperature data of the data storage unit with the passage of time is higher than a predetermined reference determination temperature. A single can / two-water channel complex provided with a flow rate control circuit that controls the throttle according to data given in advance.

The bath temperature sensor for detecting the temperature of hot water in the bathtub, and the pump drive timing control means according to claim 1, 2 or 3, wherein the reheating drive is performed after the hot water temperature in the reheating heat exchanger is cooled by a fan. A flow rate control circuit according to claim 4 or 5, wherein the flow rate control circuit controls the flow rate of the recirculated hot water by controlling the flow rate control mechanism, and the bath water temperature detected by the bath temperature sensor is given in advance. When the temperature is higher than the threshold temperature, the pump drive timing control means is operated to recharge, and when the bath water temperature is lower than the threshold temperature, the flow rate control circuit is operated to recharge. A can and two-water channel complex, characterized in that it is provided with a chase mode selection / designation section.

A mild temperature range is given near the lower side of the bath set temperature, which is the target temperature for boiling the bath, and the reheating mode selection / designation section indicates that the hot water temperature in the bathtub detected by the bath temperature sensor 7. A single can two-water channel composite apparatus in which the pump drive timing control means and the flow rate control circuit are operated together to perform reheating.