JP3872900B2 - One-can double waterway combustion equipment with washing water injection function - Google Patents

One-can double waterway combustion equipment with washing water injection function Download PDF

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JP3872900B2
JP3872900B2 JP19798998A JP19798998A JP3872900B2 JP 3872900 B2 JP3872900 B2 JP 3872900B2 JP 19798998 A JP19798998 A JP 19798998A JP 19798998 A JP19798998 A JP 19798998A JP 3872900 B2 JP3872900 B2 JP 3872900B2
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water
hot water
water injection
washing machine
temperature
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健生 山口
喜久雄 岡本
中山　　晃
美穂 山口
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株式会社ガスター
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Description

【０００１】
【発明の属する技術分野】
本発明は、浴槽の残り湯を洗濯機へ注水して有効利用を図ることが可能な洗濯注水機能付き一缶複水路燃焼機器に関するものである。
【０００２】
【従来の技術】
図５には出願人が開発している洗濯注水機能付き一缶複水路燃焼機器である一缶二水路風呂給湯器（器具）のシステム構成例が示されている。同図において、器具ケース１内には給湯用の給湯熱交換器２と浴槽湯水追い焚き用の追い焚き熱交換器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に給湯側の水管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に追い焚き側の水管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がバーナの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、燃料ガスの供給量（バーナの燃焼熱量）を開弁量によって制御する比例弁１０とが介設されている。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には給湯熱交換器２の入水温度（給水温度）を検出する給水温度検出センサ１２と、給水（給湯）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とが設けられている。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の入側は管路１６を介して循環ポンプ１７の吐出側に連通接続されている。そして、循環ポンプ１７の吸込側と浴槽（風呂）１８は戻り管２０を介して連通接続されており、この戻り管２０には追い焚き熱交換器３に入り込む浴槽湯水の温度を風呂温度として検出する風呂温度検出手段である風呂温度センサ２１と、流水を検出する流水センサ（流水スイッチ）１９とが設けられている。前記追い焚き熱交換器３の出側は往管２２を介して浴槽１８に連通接続されており、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に戻る通路は浴槽湯水が循環する浴槽湯水循環通路２３を構成している。
【０００７】
前記給湯管１４と浴槽湯水循環通路２３（図５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が介設されている。
【０００８】
また、上記追い焚き熱交換器３の出側から浴槽１８に至るまでの通路には洗濯機３１に浴槽湯水を導く注水通路３２が分岐形成され、その分岐部には例えば三方弁等により形成される洗濯注水制御弁３３が設けられている。この洗濯注水制御弁３３は追い焚き熱交換器３から流れ出た湯水を浴槽１８に戻す追い焚き循環側と、追い焚き熱交換器３から流れ出た湯水を注水通路３２を通して洗濯機３１へ導く洗濯注水側とに湯水の流れを切り換えることができるものであり、洗濯注水ユニットケース３４内に収容されている。該洗濯注水ユニットケース３４は洗濯機３１の配設場所の近傍に設けられている。
【０００９】
この洗濯注水ユニットケース３４には、洗濯機３１への浴槽湯水の注水開始を指令するための洗濯注水開始指令手段３５と、洗濯機３１への所望の注水量を設定するための洗濯注水量設定手段３６とが設けられている。上記洗濯注水制御弁３３と洗濯注水ユニットケース３４と洗濯注水開始指令手段３５と洗濯注水量設定手段３６とにより、注水通路３２を通して浴槽湯水を洗濯機３１に注水する洗濯注水手段が構成されている。
【００１０】
この器具には器具運転を制御するための制御装置２７が設けられ、この制御装置２７にはリモコン２８が信号接続されている。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、自動運転、給湯運転、湯張り運転、追い焚き運転等を指令する各種運転ボタンや、必要な情報を表示する表示部等が設けられている。
【００１１】
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、例えば、給湯運転と、湯張り運転と、追い焚き運転と、洗濯注水運転とを次のように制御する。
【００１２】
例えば、台所等に導かれた給湯通路の水栓３０が開けられ、給湯運転を開始することが可能な予め定めた給湯作動流量（例えば、２．５リットル／min）以上の流量が流量検出センサ１３により検出されると、燃焼ファン６を回転させ、電磁弁７，８を開弁させてバーナ５に燃料ガスを供給し、点火器（図示せず）の点火によりバーナ５の燃焼を開始させ、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。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。
【００１３】
また、リモコン２８により自動運転のモードや、湯張り運転モードが指令されると、注湯弁２５を開け、上記同様にバーナ５の燃焼により給湯熱交換器２で作り出された湯を、給湯管１４と湯張り通路２４と浴槽湯水循環通路２３を順に通して浴槽１８に供給し、浴槽水位がリモコン２８に設定されている浴槽設定水位に達したと判断したときに注湯弁２５を閉じて湯張り運転を終了する。
【００１４】
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を回転駆動させ、浴槽１８内の湯水の循環を浴槽湯水循環通路２３を通して行い、風呂温度センサ２１により検出される風呂検出温度が風呂設定温度よりも低いときには、流水センサ１９から流水オン信号を受けてバーナ５の燃焼を行わせ、浴槽湯水循環通路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。そして、風呂温度センサ２１によって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の燃焼停止を行って追い焚き運転モードの動作を終了する。
【００１５】
また、洗濯注水運転は次のようにして行われる。例えば、洗濯注水開始指令手段３５によって洗濯機３１への注水開始が指令されたことを検知すると、湯張り運転と追い焚き運転が行われていない状態で、洗濯注水制御弁３３を追い焚き循環側から洗濯注水側へ切り換え、循環ポンプ１７を駆動し、浴槽湯水を戻り管２０と追い焚き熱交換器３と往管２２と注水通路３２とを順に通して洗濯機３１に注水する。このとき、浴槽湯水を加熱するためのバーナの風呂側燃焼は行われず、追い焚き熱交換器３により加熱されていない湯水を洗濯機３１へ注水する。そして、洗濯注水量設定手段３６に設定されている注水量が洗濯機３１に注ぎ終わったことを検知したときに循環ポンプ１７を停止すると共に洗濯注水制御弁３３を洗濯注水側から追い焚き循環側へ切り換えて洗濯注水運転を終了する。
【００１６】
上記のように洗濯注水機能を備えることによって、浴槽の残り湯を洗濯機３１に自動的に注水することができることとなり、浴槽の残り湯の有効利用を促進させることができ、節水効果を得ることができる。
【００１７】
【発明が解決しようとする課題】
しかしながら、上記のような洗濯注水機能付きの一缶二水路燃焼機器では、洗濯注水運転に関して次に示すような問題発生の虞があることが分かった。すなわち、洗濯注水運転と給湯運転とが共に行われる場合があり、この場合にはバーナ５は給湯燃焼することから、一缶二水路タイプの燃焼機器では、その給湯燃焼によって、給湯熱交換器２の通水だけでなく、追い焚き熱交換器３の通水をも加熱され、このことにより、追い焚き熱交換器３から洗濯機３１へ注水される浴槽湯水の水温が次に示すような様々な問題発生の虞がある５０℃よりも高い温度になってしまう場合が生じる。
【００１８】
その問題とは、洗濯機３１に注水された高温の浴槽湯水によって火傷を負わせてしまう危険が生じたり、洗濯機３１の構成部品を浴槽湯水の熱によって変形・損傷させてしまったり、また、洗剤の種類によっては浴槽湯水の熱によって溶解度が低下して洗浄能力を低下させてしまったり、さらに、洗濯物の汚れ成分であるタンパク質が凝固してそのタンパク質の汚れがとれにくくなったり、さらにまた、上記高温熱によって衣類の縮み等が生じ衣類等を傷めてしまう等の問題である。
【００１９】
本発明は上記課題を解決するために成されたものであり、その目的は、洗濯注水には適さない水温の浴槽湯水が洗濯機に注水されるのを防止することができる洗濯注水機能付き一缶複水路燃焼機器を提供することにある。
【００２０】
【課題を解決するための手段】
上記目的を達成するために、この発明は、次に示すような構成をもって前記課題を解決する手段としている。すなわち、第１の発明は、浴槽湯水追い焚き用の追い焚き熱交換器と少なくとも給湯用の熱交換器とが一体的に設けられ、それら一体化した熱交換器を共通に燃焼加熱するバーナが設けられており、また、浴槽湯水を循環ポンプの駆動により上記追い焚き熱交換器を通して循環させる浴槽湯水循環通路が形成され、この浴槽湯水循環通路には浴槽湯水を追い焚き熱交換器を通して洗濯機へ導く注水通路が分岐形成されており、該注水通路を通して洗濯機に浴槽湯水を注水する洗濯注水手段が設けられている一缶複水路燃焼機器において、洗濯注水動作中に、バーナ燃焼が行われているときには、バーナの燃焼熱量のうちの追い焚き側の熱量の情報と、追い焚き熱交換器を流れる湯水の流量情報と、追い焚き熱交換器に流れ込む湯水の湯温情報と、予め与えられた洗濯機注水水温の推定検出用データとに基づいて、洗濯機に注水される水温を推定検出する洗濯機注水水温推定検出部と；推定検出された洗濯機への注水水温が設定の注水停止温度よりも高いときには洗濯機への注水を停止する注水強制停止部と；が設けられている構成をもって前記課題を解決する手段としている。
【００２１】
第２の発明は、浴槽湯水追い焚き用の追い焚き熱交換器と少なくとも給湯用の熱交換器とが一体的に設けられ、それら一体化した熱交換器を共通に燃焼加熱するバーナが設けられており、また、浴槽湯水を循環ポンプの駆動により上記追い焚き熱交換器を通して循環させる浴槽湯水循環通路が形成され、この浴槽湯水循環通路には浴槽湯水を追い焚き熱交換器を通して洗濯機へ導く注水通路が分岐形成されており、該注水通路を通して洗濯機に浴槽湯水を注水する洗濯注水手段が設けられている一缶複水路燃焼機器において、洗濯注水動作中に、給湯運転の割り込みが行われているときには、バーナの燃焼熱量のうちの追い焚き側の熱量の情報と、追い焚き熱交換器を流れる湯水の流量情報と、追い焚き熱交換器に流れ込む湯水の湯温情報と、予め与えられた洗濯機注水水温の推定検出用データとに基づいて、洗濯機に注水される水温を推定検出する洗濯機注水水温推定検出部と；推定検出された洗濯機への注水水温が設定の注水停止温度よりも高いときには洗濯機への注水を停止する注水強制停止部と；が設けられている構成をもって前記課題を解決する手段としている。
【００２２】
第３の発明は、上記第１又は第２の発明の構成に加えて、注水強制停止部により洗濯機への注水が強制的に停止された後にも引き続き洗濯機注水水温推定検出部による水温推定検出動作を継続させ、推定検出された洗濯機への注水水温が設定の注水再開温度以下に低下したときには、洗濯機への注水を再開させる注水再開制御部が設けられている構成をもって前記課題を解決する手段としている。
【００２３】
第４の発明は、上記第１又は第２の発明の構成に加えて、注水強制停止部により洗濯機への注水が強制的に停止された後に、バーナの燃焼状態が予め定めた注水再開条件を満たした状態となったときには、洗濯機への注水を再開させる注水再開制御部が設けられている構成をもって前記課題を解決する手段としている。
【００２４】
第５の発明は、上記第３又は第４の発明を構成する注水再開制御部は、洗濯機への注水停止状態を維持させたまま循環ポンプを駆動させ、浴槽湯水を浴槽湯水循環通路を通して一時的に循環させた後に、洗濯機への注水を再開させる構成とした構成をもって前記課題を解決する手段としている。
【００２５】
第６の発明は、上記第３又は第４の発明の構成を備え、水を追い焚き熱交換器を通して浴槽に流し込む給水手段が設けられており、注水再開制御部は、洗濯機への注水を再開させるときには上記給水手段によって追い焚き熱交換器に水を流し込み、追い焚き熱交換器内に滞留していた湯水を浴槽側へ排出した後に、洗濯機への注水を再開させる構成とした構成をもって前記課題を解決する手段としている。
【００２６】
第７の発明は、上記第５又は第６の発明の構成を備え、追い焚き熱交換器から流れ出る湯水の温度を検出する出側湯水温度検出手段が設けられており、洗濯機注水水温推定検出部により推定検出された洗濯機への注水水温に代えて、上記出側湯水温度検出手段により実測された水温を使用する構成をもって前記課題を解決する手段としている。
【００２７】
上記構成の発明において、例えば、洗濯注水動作中に、バーナ燃焼が行われているときには、洗濯機注水水温推定検出部は浴槽から追い焚き熱交換器を介して洗濯機へ流れ込む浴槽湯水の水温を推定検出する。注水強制停止部はその推定検出された洗濯機への注水水温が設定の注水停止温度よりも高いときには洗濯機への注水を強制的に停止する。
【００２８】
このように、洗濯機への注水水温が設定の注水停止温度よりも高い場合に、洗濯機への注水を停止させることによって、前述したような様々な問題を引き起こす虞がある高温の浴槽湯水が洗濯機へ流れ込むのを防止することができ、前記課題が解決される。
【００２９】
【発明の実施の形態】
以下に、本発明に係る実施形態例を図面に基づき説明する。
【００３０】
第１の実施形態例に示す洗濯注水機能付き一缶複水路燃焼機器は前記図５に示す一缶二水路風呂給湯器と同様なシステム構成を備えており、図１には第１の実施形態例において特徴的な制御構成が実線により示されている。なお、この実施形態例の説明において、前記図５に示すシステム構成の説明は前述したので、その重複説明は省略する。
【００３１】
この実施形態例において特徴的な制御構成は、図１に示すように、燃焼制御部４０と追い焚き側熱量検出部４１と洗濯機注水水温推定検出部４２と給湯割り込み有無監視部４３とデータ格納部４４とタイマ４５と注水再開制御部４６と洗濯注水制御部４７と注水強制停止部４８とを有して構成されている。
【００３２】
燃焼制御部４０は給湯運転と湯張り運転と追い焚き運転等に伴うバーナ燃焼運転を制御するものであり、例えば、給湯運転時や湯張り運転時には、リモコン２８に設定されている給湯設定温度（湯張りの設定温度）の湯を供給するのに必要な熱量を求め、給湯熱交換器２の通水がその求めた熱量を得ることができるように、比例弁１０に加える開弁駆動電流を図３の実線Ｌ１や破線Ｌ２に示すような燃焼制御データに基づいて制御してバーナ５の燃焼制御を行う。
【００３３】
上記実線Ｌ１は給湯単独運転時における給湯側要求熱量と開弁駆動電流との関係データから成る燃焼制御データであり、破線Ｌ２は給湯と追い焚きとの同時運転時における給湯側要求熱量と開弁駆動電流との関係データから成る燃焼制御データである。給湯と追い焚きとの同時運転時には、給湯優先のバーナ燃焼制御が行われるが、給湯熱交換器２と追い焚き熱交換器３の両方共に通水があり、バーナ燃焼熱量は給湯熱交換器２の通水および追い焚き熱交換器３の通水に吸熱されることから、同時運転時には、給湯単独運転時よりも高い燃焼熱量でもってバーナ５の燃焼を行わせなければ給湯側の要求熱量を給湯熱交換器２の通水に与えることができない。このことから、破線Ｌ２に示すような同時運転時の燃焼制御データは追い焚き側への吸熱熱量を考慮して実線Ｌ１に示すような給湯単独運転時の燃焼制御データとは異なるデータが与えられる。
【００３４】
例えば、燃焼制御部４０は、給湯側に要求される熱量が図３に示す熱量Ｐexである場合に、給湯単独運転時には、実線Ｌ１に示す燃焼制御データに基づいて比例弁１０には開弁駆動電流Ｉａを加える。これに対して、同時運転時には、追い焚き熱交換器３の通水に熱量が吸熱されるために、破線Ｌ２に示す燃焼制御データに基づいて比例弁１０には上記電流Ｉａよりも多い開弁駆動電流Ｉｂを加えることになり、給湯側の要求熱量が同じでも、同時運転時のバーナ燃焼熱量は給湯単独運転時のバーナ燃焼熱量よりも多くなるように燃焼制御が行われる。
【００３５】
洗濯注水制御部４７は洗濯注水開始指令手段３５が操作されて洗濯機３１への浴槽湯水の注水開始を指令されたことを検知したときには、湯張り運転および追い焚き運転が行われていない状態で、洗濯注水制御弁３３を追い焚き循環側から洗濯注水側へ切り換え、循環ポンプ１７を起動させて、浴槽１８の湯水を戻り管２０と追い焚き熱交換器３と往管２２と注水通路３２とを順に通して洗濯機３１に注水し、その後、洗濯機３１への注水量が洗濯注水量設定手段３６に設定されている注水量に達したときに循環ポンプ１７を停止させ、また、洗濯注水制御弁３３を洗濯注水側から追い焚き循環側に切り換えて洗濯機３１への注水動作を終了する。
【００３６】
なお、洗濯機３１への注水量が設定注水量に達したことを検知する手法としては様々な手法が考えられる。その一例を以下に示す。例えば、注水量と該注湯量を洗濯機３１に注水するのに要する時間との関係を循環ポンプ１７の能力を考慮して予め実験や演算等により求め、その求めた実験（演算）の結果に基づいて、設定の注水量とその注水量を洗濯機３１に注水するのに要する時間との関係データを予め定めデータ格納部４４に格納しておき、洗濯注水制御部４７は洗濯注水開始の指令が加えられたことを検知したときには、洗濯注水量設定手段３６に設定されている洗濯機３１への注水量の情報と、上記データ格納部４４に格納されている関係データとに基づき、上記設定注水量を洗濯機３１に注水するのに要する時間を求め、該求めた時間をタイマ４５にセットする。
【００３７】
そして、洗濯注水制御部４７は洗濯機３１への注水が開始されるのとほぼ同時にタイマ４５の駆動を開始させ、このタイマ４５がタイムアップしたときに、洗濯機３１への浴槽湯水注水量が設定の注水量に達したと判断し、洗濯注水制御部４７は上記の如く洗濯注水動作を終了する。
【００３８】
給湯割り込み有無監視部４３は上記洗濯注水制御部４７の動作情報を時々刻々と取り込み、該情報に基づき洗濯注水動作が行われていることを検知している間に、燃焼制御部４０の動作情報や流量検出センサ１３のセンサ出力情報に基づき給湯運転の割り込みがあるか否かを監視する。
【００３９】
追い焚き側熱量検出部４１は上記給湯割り込み有無監視部４３の監視情報および洗濯注水制御部４７の動作情報を時々刻々と取り込み、それら取り込んだ情報に基づいて洗濯注水動作中に給湯割り込みが行われていることを検知している間には、バーナ燃焼熱量のうち、追い焚き熱交換器３の通水が吸熱する熱量を追い焚き側熱量として時々刻々と求める。
【００４０】
その追い焚き側熱量の検出手法の具体例を示す。例えば、バーナ５の燃焼熱量Ｐallから給湯熱交換器２の通水が吸熱した熱量を差し引いた熱量が追い焚き側熱量であり、比例弁１０に加えられている開弁駆動電流に基づいてバーナ５の燃焼熱量Ｐallを検出することができ、また、給水温度検出センサ１２の検出給水温度をＴinとし、流量検出センサ１３の検出流量をＱとし、給湯温度センサ１５の検出温度をＴoutとした場合に、給湯熱交換器２の通水吸熱量Ｐｑは下式（１）により求めることができることから、追い焚き側熱量Ｐｈは下式（２）の演算式によって求めることができる。
【００４１】
Ｐｑ＝（Ｔout−Ｔin）×Ｑ・・・・・（１）
【００４２】
Ｐｈ＝Ｐall−Ｐｑ＝Ｐall−（Ｔout−Ｔin）×Ｑ・・・・・（２）
【００４３】
上記のことから、上式（２）を追い焚き側熱量Ｐｈの検出用データとしてデータ格納部４４に格納しておき、開弁駆動電流に基づいたバーナ燃焼熱量を上記パラメータＰallに、給水温度検出センサ１２により検出された給水温度を上記パラメータＴinに、流量検出センサ１３の検出流量を上記パラメータＱに、給湯温度センサ１５の検出温度を上記パラメータＴoutにそれぞれ代入し、上式（２）に従って演算することによって、追い焚き側熱量Ｐｈを算出することができる。
【００４４】
追い焚き側熱量検出部４１は、上記の如く算出した追い焚き側熱量の情報を洗濯機注水水温推定検出部４２に出力する。
【００４５】
洗濯機注水水温推定検出部４２は上記追い焚き側熱量検出部４１から追い焚き側熱量の情報を受け取ると、この情報と、追い焚き熱交換器３に流れ込む浴槽湯水の温度の情報と、追い焚き熱交換器３の通水流量の情報と、データ格納部４４に予め格納しておいた洗濯機注水水温の推定検出用データとに基づいて追い焚き熱交換器３から流れ出る湯水の温度（洗濯機注水水温）Ｔｄを時々刻々と推定検出する。
【００４６】
この実施形態例では、上記洗濯機注水水温の推定検出用データは下式（３）に示す演算式データにより構成されている。
【００４７】
Ｔｄ＝Ｔｈ＋（Ｐｈ／Ｑｈ）・・・・・（３）
【００４８】
ただし、上式（３）に示すＴｈは追い焚き熱交換器３に流れ込む浴槽湯水温度を表し、Ｐｈは前記追い焚き側熱量を表し、Ｑｈは追い焚き熱交換器３の通水流量を表している。
【００４９】
この実施形態例では、流水センサ１９により流水を検知することができる最低の流量（例えば４リットル／min）が上記追い焚き熱交換器３の通水流量Ｑｈとして予め上式（３）に与えられており、上式（３）のパラメータＴｈに風呂温度センサ２１の検出水温を、上記パラメータＰｈに前記追い焚き側熱量検出部４１により求められた追い焚き側熱量をそれぞれ代入し、上式（３）に従って演算することによって、追い焚き熱交換器３から流れ出て洗濯機３１に注水される洗濯機注水水温Ｔｄを推定検出する。
【００５０】
洗濯機注水水温推定検出部４２は上記の如く洗濯機注水水温Ｔｄを求めると、その求めた洗濯機注水水温Ｔｄの情報を注水強制停止部４８に出力する。注水強制停止部４８はその加えられた洗濯機注水水温Ｔｄをデータ格納部４４に予め格納しておいた注湯停止温度Ｔstop（例えば、５０℃）に比較し、推定検出された洗濯機注水水温Ｔｄが注湯停止温度Ｔstopよりも高いか否かを判断する。
【００５１】
そして、洗濯機注水水温推定検出部４２は洗濯機注水水温Ｔｄが上記注湯停止温度Ｔstopよりも高いと判断したときには、洗濯機へ注水する浴槽湯水温度が洗濯注水に適した水温の範囲を越えて高いと判断し、不適切な高めの湯温の浴槽湯水が洗濯機３１へ注水されることに起因した前述したような様々な問題発生の虞があることから、そのような問題発生を防止するために洗濯機３１への注水を強制的に停止させる必要があると判断し、循環ポンプ１７を停止し、また、洗濯注水制御弁３３を洗濯注水側から追い焚き循環側に切り換えて、洗濯機３１への浴槽湯水注水を強制的に停止させる。また、このとき、注水強制停止部４８は、タイマ４５の駆動を中断する。
【００５２】
ところで、この実施形態例では、前記の如く、洗濯機注水水温推定検出部４２は、バーナの給湯燃焼中に、流水センサ１９により流水を検知することができる最低の流量を用いて洗濯機注水水温Ｔｄを推定検出する。この場合には、流量以外の状態が同じという条件の下で想定される洗濯機注水水温の範囲の中で最も高い温度が洗濯機注水水温Ｔｄとして推定検出されることとなり、この推定検出された水温に基づいて上記注水強制停止部４８による注水強制停止制御動作が行われることから、洗濯機３１へ不適切な湯温の湯水が注水されるのをより確実に防止することができ、安全性を高めることができる。
【００５３】
注水再開制御部４６は上記注水強制停止部４８の動作情報を取り込み、該情報に基づき洗濯注水動作中に上記注水強制停止部４８によって注水が強制的に停止されたことを検知した以降に、燃焼制御部４０の情報あるいは給湯割り込み有無監視部４３の監視情報に基づいて、バーナ５の燃焼状態が予め定めた次に示す注水再開条件を満たした状態になったことを検知したときには、洗濯注水に適した温度の浴槽湯水を洗濯機３１へ注水することが可能な状態に回復したと判断し、洗濯注水動作を再開させる。
【００５４】
上記注水再開条件として、この実施形態例では、次に示す２つの条件が与えられており、それらのどちらか一方の条件が満たされたときに、洗濯機３１への注水を再開するように構成されている。
【００５５】
まず、第１の条件は、バーナ５の給湯燃焼が停止することであり、第２の条件は、給湯側の要求熱量が設定の注水再開熱量まで低下したことである。上記設定の注水再開熱量は予め定め与えておいてもよいし、浴槽湯水の温度に応じて可変設定するようにしてもよい。
【００５６】
ところで、洗濯注水動作を中断している間に追い焚き熱交換器３内に滞留している湯水はバーナの給湯燃焼によって加熱され、この加熱に起因して非常に高温になることがある。このように、高温に加熱された追い焚き熱交換器３内の湯水が洗濯注水再開によって直接的に洗濯機３１へ流れ出ると、その高温の湯によって火傷を負わせる危険がある等の問題発生が考えられる。そこで、この実施形態例では、注水再開制御部４６は、図２に示すように、上記の如く注水再開条件を満たしたか否かを判断する再開許可判定部５０に加えて、注水再開時高温湯吐出防止部５１と再開部５２とを有して構成されており、前記洗濯注水再開時における洗濯機３１への高温湯吐出問題を防止する構成を備えている。
【００５７】
上記再開許可判定部５０は、上記の如く、洗濯注水中断中にバーナの燃焼状態が注水再開条件を満たした状態になったか否かを監視し、バーナ燃焼状態が注水再開条件を満たした状態になったと判断したときには、洗濯注水再開許可信号を注水再開時高温湯吐出防止部５１に出力する。
【００５８】
注水再開時高温湯吐出防止部５１は上記洗濯注水再開許可信号を受け取ると、洗濯注水制御弁３３が追い焚き循環側に切り換えられている状態のまま、循環ポンプ１７を起動させる。この循環ポンプ１７の起動によって浴槽湯水循環通路２３内の湯水は流動し、追い焚き熱交換器３内に滞留していた湯水を浴槽１８に排出することができる。
【００５９】
注水再開時高温湯吐出防止部５１はタイマ５３を内蔵しており、上記の如く循環ポンプ１７を起動させてから追い焚き熱交換器３内に滞留していた湯水を浴槽１８に排出し終えるまでに要する時間に余裕時間を加えた時間が上記内蔵のタイマ５３に設定されており、上記の如く循環ポンプ１７を起動させると同時に上記内蔵のタイマ５３を駆動させ、該タイマ５３がタイムアップしたときに、追い焚き熱交換器３内に滞留していた高温の湯水は浴槽１８に排出され、洗濯注水動作を再開させても、火傷の危険等の問題発生の虞がある高温の湯が洗濯機３１に吐出することはないと判断し、循環ポンプ１７を停止させ、洗濯注水再開指令を再開部５２に出力する。
【００６０】
再開部５２は上記洗濯注水再開指令を受け取ると、洗濯注水制御弁３３を追い焚き循環側から洗濯注水側へと切り換え、循環ポンプ１７を起動させて、洗濯注水動作を再開させる。
【００６１】
なお、洗濯注水中における給湯割り込み運転時には、バーナ燃焼熱量の一部が追い焚き熱交換器３の通水に吸熱されることから、燃焼制御部４０は同時運転時と同様な燃焼制御を行うことになる。
【００６２】
第１の実施形態例において特徴的な制御構成は上記のように構成されており、以下に、洗濯注水の制御動作の一例を図４のフローチャートに基づき簡単に説明する。
【００６３】
まず、洗濯注水開始指令手段３５が操作されて、洗濯注水開始指令が発せられたことを検知すると（ステップ１０１）、湯張り運転と追い焚き運転が行われていない状態で、洗濯注水制御部４７により、洗濯注水制御弁３３を追い焚き循環側から洗濯注水側に切り換え、循環ポンプ１７を起動して洗濯機３１への浴槽湯水の注水を開始し、また、タイマ４５をセット・駆動する（ステップ１０２）。
【００６４】
上記循環ポンプ１７の起動後、ポンプ駆動による流水を流水センサ１９により検出することができたか否かを判断し（ステップ１０３）、流水センサ１９により注水を検知することができないと判断したときには、循環ポンプ１７を起動させてからの経過時間が浴槽湯水有無判断用の設定時間に達したか否かを判断し（ステップ１１２）、上記経過時間が設定時間を越えたのにも拘わらず流水センサ１９により流水を検知できないと判断したときには、浴槽１８に湯水が無く、このために洗濯注水を行うことはできないと判断し、循環ポンプ１７を停止する（ステップ１１３）。
【００６５】
また、循環ポンプ１７の起動後、上記浴槽湯水有無判断用の設定時間を経過する前に、流水センサ１９により流水を検知したときには、浴槽湯水の洗濯注水は順調に開始されたと判断し、この洗濯注水中に、給湯割り込み有無監視部４３の動作情報に基づき給湯割り込みが開始されたか否かを判断する（ステップ１０４）。給湯割り込みが無いと判断したときには、タイマ４５がタイムアップしたか否かを判断し（ステップ１１０）、タイムアップしていないと判断したときには、洗濯機３１への注水量は設定注水量に達していないことから、前記ステップ１０３以降の動作を繰り返し行って洗濯注水動作を継続する。
【００６６】
洗濯注水中に、給湯の割り込みがあったと判断したときには、追い焚き側熱量検出部４１により追い焚き側熱量Ｐｈを算出し、該算出した追い焚き側熱量Ｐｈと、風呂温度センサ２１の検出温度Ｔｈと、洗濯機注水水温の推定検出用データとに基づいて、洗濯機注水水温推定検出部４２により、追い焚き熱交換器３から流れ出て洗濯機３１に注水される洗濯機注水水温Ｔｄを推定検出する（ステップ１０５）。
【００６７】
そして、上記推定検出された上記洗濯機注水水温Ｔｄが注水停止温度Ｔstopよりも高いか否かを判断し（ステップ１０６）、洗濯機注水水温Ｔｄが注水停止温度Ｔstop以下であると判断したときには、洗濯機３１へ注水されている水温は、洗濯注水に適した水温であると判断し、タイマ４５がタイムアップしていなければ、洗濯注水動作を継続させる。
【００６８】
上記推定検出された洗濯機注水水温Ｔｄが注水停止温度Ｔstopよりも高いと判断したときには、その高めの湯温によって前述したような様々な問題発生の虞があると判断し、注水強制停止部４８により、循環ポンプ１７を停止し、洗濯注水制御弁３３を洗濯注水側から追い焚き循環側へ切り換え、洗濯注水動作を中断し、また、タイマ４５の駆動も中断する（ステップ１０７）。
【００６９】
その後、注水再開制御部４６の再開許可判定部５０により、バーナ燃焼状態が注水再開条件を満たした状態になったか否かを判断し（ステップ１０８）、注水再開条件を満たしていないと判断したときには洗濯注水の中断を維持しながら、バーナ燃焼状態の監視を引き続き行う。そして、注水再開条件を満たしたと判断したときに、注水再開時高温湯吐出防止部５１による高温吐出防止動作、つまり、洗濯注水制御弁３３が追い焚き循環側に切り換えられているまま、循環ポンプ１７を所定の時間だけ駆動させ、バーナの給湯燃焼によって加熱された追い焚き熱交換器３内の滞留湯水を浴槽１８に排出させる動作を行って、高温に加熱された追い焚き熱交換器３内の滞留湯水が洗濯注水再開時に洗濯機３１に吐出するのを防止する。
【００７０】
上記高温吐出動作の終了後、前記ステップ１０２以降の動作を繰り返し、洗濯機３１への浴槽湯水の注水を再開させ、また、タイマ４５を再駆動させる。その後、タイマ４５がタイムアップしたと判断したときに、洗濯機３１への注水量が設定の注水量に達したと判断し、洗濯注水制御部４７により、循環ポンプ１７を停止し、洗濯注水制御弁３３を洗濯注水側から追い焚き循環側へ切り換え（ステップ１１１）、洗濯注水動作を終了する（ステップ１１４）。
【００７１】
この実施形態例によれば、洗濯注水動作中に、給湯割り込みがあり、バーナが給湯燃焼を行っている場合に、追い焚き熱交換器３から洗濯機３１へ注水する洗濯機注水水温Ｔｄを推定検出し、該推定検出された洗濯機注水水温Ｔｄが設定の注水停止温度Ｔstopよりも高いときには洗濯機３１への浴槽湯水注水を強制的に停止するので、前記様々な問題を引き起こす湯温（例えば５０℃よりも高い湯温）の浴槽湯水が洗濯機３１に注水されることが無くなり、洗濯注水動作中における給湯割り込みに起因した問題発生を防止することができる。
【００７２】
また、上記の如く洗濯機３１へ注水される湯水の水温を推定検出するので、洗濯機３１へ注水される水温を実測するための温度センサ等を設ける必要がなく、部品点数の増加を防止することができる。
【００７３】
さらに、追い焚き側熱量を考慮して洗濯機注水水温Ｔｄを推定検出しているので、バーナ燃焼熱量の変動に伴って追い焚き側熱量が変動した場合にはその熱量変動後の洗濯機注水水温Ｔｄが瞬時に推定検出され、この推定検出された洗濯機注水水温Ｔｄに基づいて洗濯注水の制御動作が行われることから、熱量変動によって洗濯注水には適さない湯温の湯が洗濯機３１へ流れ込む前に、確実に、洗濯注水を停止させることができる。
【００７４】
これに対して、洗濯機３１へ注水される湯水の水温を例えば温度センサにより実測し該実測水温に基づいて上記同様な注水強制停止の制御動作を行った場合には、熱量変動によって洗濯注水に適さない湯温の湯水が追い焚き熱交換器３で作られてしまったときには、その不適切な湯温の浴槽湯水が追い焚き熱交換器３から実際に流れ出なければ、洗濯注水を停止させることはできず、このことから、洗濯注水の停止が遅れることが考えられる。もちろん、その停止動作の遅れは僅かなものであり、殆ど支障はないものと思われるが、本実施形態例に示すように洗濯機注水水温Ｔｄを推定検出する構成にすることによって、より一層確実に、洗濯注水に適さない湯温の浴槽湯水が洗濯機３１へ注水されるのを防止することができる。
【００７５】
さらに、この実施形態例では、注水再開制御部４６は注水再開時高温湯吐出防止部５１を備えているので、洗濯注水中断中に、バーナの給湯燃焼によって追い焚き熱交換器３内の滞留湯水が高温に加熱されても、その加熱された高温の湯を追い焚き熱交換器３から浴槽１８に排出した後に、洗濯機３１への注水を開始することとなり、このことから、高温に加熱された浴槽湯水が直接的に洗濯機３１へ注水されるのを防止することができ、洗濯注水再開時に、高温の浴槽湯水注水によって火傷を負わせてしまうというような問題を確実に回避することができる。もちろん、洗濯注水動作中には、通常、何人も入浴していない状態であることから、上記の如く、注水再開時に、高温湯を浴槽１８に排出しても、その高温湯が入浴中の人に当たって火傷を負わせるという問題は殆ど発生しない。
【００７６】
以下に、第２の実施形態例を説明する。この実施形態例において特徴的なことは、洗濯注水を再開するときには、循環ポンプ１７を駆動させて追い焚き熱交換器３内に滞留していた湯水を浴槽１８へ排出してから洗濯機３１への浴槽湯水の注水を再開するのに代えて、給湯側から水を浴槽湯水循環通路２３内に流し込み該水によって追い焚き熱交換器３内に滞留していた湯水を浴槽１８に排出してから洗濯機３１への浴槽湯水の注水を再開する構成を備えたことである。それ以外の構成は前記第１の実施形態例に示した構成とほぼ同様であり、その共通部分の重複説明は省略する。
【００７７】
この実施形態例では、洗濯注水中断中に、給湯割り込み運転が終了してバーナ５の燃焼が停止することが注水再開条件として定められており、注水再開制御部４６の再開許可判定部５０は、洗濯注水中断中に、給湯割り込み運転が終了してバーナ５の燃焼が停止したことを検知したときに、洗濯機３１への浴槽湯水の注水を再開してもよいバーナ状態になったと判断し、洗濯注水再開許可信号を注水再開時高温湯吐出防止部５１に出力する。
【００７８】
注水再開時高温湯吐出防止部５１は上記洗濯注水再開許可信号が加えられると、洗濯注水制御弁３３を追い焚き循環側に切り換えた状態のまま注湯弁２５を開弁し、また、注湯弁２５を開弁してもバーナ燃焼が行われないように燃焼阻止信号を燃焼制御部４０に出力し、バーナ燃焼を阻止し、加熱されていない水を給湯熱交換器２から給湯管１４と湯張り通路２４を順に介して浴槽湯水循環通路２３内に流し込み、この通水によって追い焚き熱交換器３内に滞留していた湯水を浴槽１８に排出させる。この実施形態例では、給水管１１と給湯熱交換器２と給湯管１４と湯張り通路２４と注湯弁２５とによって、水を追い焚き熱交換器３を通して浴槽１８に流し込む給水手段を構成している。
【００７９】
注水再開時高温湯吐出防止部５１はタイマ５３を内蔵しており、該タイマ５３には給湯側から浴槽湯水循環通路２３への水の供給量が所定の給水量（つまり、追い焚き熱交換器３内に滞留していた湯水を浴槽１８に排出するのに要する給水量）に達するまでに要する時間に余裕時間を加えた時間が設定されており、給湯側から浴槽湯水循環通路２３への水の供給が開始されたときに上記タイマ５３を駆動させ、その後、タイマ５３がタイムアップしたときに追い焚き熱交換器３内に滞留していた湯水が浴槽１８に排出されたと判断し、注湯弁２５を閉弁し、給湯側から浴槽湯水循環通路２３への給水動作を終了する。あるいは、給湯側から浴槽湯水循環通路２３への給水を開始してから流量検出センサ１３の検出流量を積算していき浴槽湯水循環通路２３側への給水量を算出し、該算出された給水量が上記所定の給水量に達したときに、上記同様に、追い焚き熱交換器３内に滞留していた湯水が浴槽１８に排出されたと判断し、注湯弁２５を閉弁し、給湯側から浴槽湯水循環通路２３への給水動作を終了するように構成してもよい。
【００８０】
そして、注水再開時高温湯吐出防止部５１は上記の如く給水動作を終了した以降に、洗濯注水再開指令を再開部５２に出力し、該再開部５２によって洗濯機３１への浴槽湯水の注水を再開させる。
【００８１】
この実施形態例によれば、前記第１の実施形態例と同様に、洗濯注水中に、給湯割り込み運転が行われているときには、洗濯機注水水温推定検出部４２によって追い焚き熱交換器３から洗濯機３１へ注水される洗濯機注水水温Ｔｄを推定検出し、該推定検出された洗濯機注水水温Ｔｄが設定の注水停止温度Ｔstopよりも高いときには洗濯注水動作を停止させる構成を備えているので、前記第１の実施形態例と同様に洗濯機３１へ注水するのに不適切な湯温の湯が洗濯機３１へ注がれてしまうのを確実に回避することができるという効果を奏することができる。
【００８２】
また、洗濯機３１への注水を再開するときには、水を浴槽湯水循環通路２３へ流し込んで追い焚き熱交換器３内に滞留していた湯水を浴槽１８に排出させてから、洗濯機３１への浴槽湯水の注水を再開させるので、洗濯注水中断中に、給湯燃焼によって追い焚き熱交換器３内に高温加熱された湯水が滞留していても、その高温の湯は浴槽１８に排出され、その後に、浴槽湯水の注水が再開されることから、洗濯注水の再開時に、高温の湯が洗濯機３１へ吐出して火傷を負わせてしまうというような問題発生を防止することができる。
【００８３】
以下に、第３の実施形態例を説明する。この実施形態例では、図５の点線に示すように、追い焚き熱交換器３から流れ出る湯水の温度を検出することができる出側湯水温度検出手段である出側温度センサ２６が設けられていることであり、洗濯機３１への注水される水温を推定検出し該推定検出された洗濯機注水水温に基づいて洗濯注水強制停止制御を行うのに代えて、上記出側温度センサ２６により実測された洗濯機注水水温Ｔｄに基づいて洗濯注水強制停止制御を行う構成としたことであり、それ以外の構成は前記各実施形態例と同様であり、その共通部分の重複説明は省略する。
【００８４】
この実施形態例では、注水強制停止部４８は、洗濯注水中に、給湯割り込み運転が行われている間には、出側温度センサ２６により実測された洗濯機注水水温を時々刻々と取り込み、該取り込んだ実測洗濯機注水水温Ｔｄを設定の注水停止温度Ｔstopに比較して、実測洗濯機注水水温Ｔｄが注水停止温度Ｔstopよりも高いと判断したときには、洗濯機３１への注水を停止させる構成を備えている。
【００８５】
上記のように、出側温度センサ２６の実測洗濯機注水水温を利用することから、この実施形態例では、洗濯機注水水温を推定検出するための追い焚き側熱量検出部４１と洗濯機注水水温推定検出部４２を省略することができ、制御構成の簡略化を図ることができる。
【００８６】
この実施形態例においても、洗濯注水の再開時における高温湯吐出問題を回避するために、前記各実施形態例に示したような注水再開制御部４６が設けられており、洗濯注水再開時に、洗濯機３１へ高温の湯が吐出し、火傷を負わせる等の問題発生を確実に回避することができる構成と成している。
【００８７】
なお、この発明は上記各実施形態例に限定されるものではなく、様々な実施の形態を採り得る。例えば、上記第１と第２の各実施形態例では、安全性の観点から、流水センサ１９により検知することができる最低の流量を利用して洗濯機注水水温Ｔｄを推定検出していたが、追い焚き熱交換器３の通水流量を検知することができる流量検出手段を設け、該流量検出手段により検出される追い焚き熱交換器３の通水流量を用いて、洗濯機注水水温Ｔｄを推定検出してもよい。
【００８８】
また、上記各実施形態例では、タイマ４５を利用して洗濯注水動作終了のタイミングを決定していたが、例えば、洗濯機３１へ流れ込む湯水の流量を検出することができる流量検出手段を設け、洗濯機３１への注水を開始させてから上記流量検出手段により検出される流量を積算していき洗濯機３１への注水量を算出し、該算出注水量が設定の注水量に達したときに、洗濯機３１への注水動作を終了するように構成してもよい。
【００８９】
さらに、上記各実施形態例では、洗濯注水開始指令手段３５と洗濯注水量設定手段３６とは別個に設けられていたが、例えば、上記洗濯注水開始指令手段３５と洗濯注水量設定手段３６とを兼用する次に示す手動式のタイマを設けてもよい。その手動式のタイマは、洗濯機３１への注水量に対応する目盛りが記された目盛り部を備えており、所望の注水量に対応する目盛り分だけ手動によってタイマを回動・設定することによって、洗濯機３１への注水量が設定され、かつ、洗濯注水開始指令が発せられる構成と成している。
【００９０】
さらに、上記各実施形態例では、洗濯機への注水を行うときには、バーナの風呂側燃焼は行わず、追い焚き熱交換器３で加熱されていない浴槽湯水を洗濯機３１へ注水していたが、例えば、洗濯注水時に、バーナを燃焼させ、洗濯に最適な湯温（例えば３０〜４０℃）の湯が洗濯機３１へ注水されるようにバーナ燃焼制御を行う構成としてもよい。さらに、例えば、綿製品では４０℃程度、毛や絹製品では３０〜３５℃程度、合成繊維製品では３０〜４０℃程度の温度の湯水で洗濯することが望ましいとされているというように、洗濯物の種類毎に洗濯に適した洗浄湯水温が異なることから、それら洗濯物の種類に応じて洗濯機３１へ注水する湯温を制御する構成を設けてもよい。
【００９１】
上記の如く、洗濯注水中に浴槽湯水の加熱を行う場合に、その洗濯注水中に給湯割り込みが生じたときには、給湯優先の観点から、給湯設定温度の湯を供給することができるようにバーナ燃焼制御が行われることとなり、このため、追い焚き熱交換器３から洗濯機３１へ注水される浴槽湯水が前述したように高温になることが考えられることから、このような場合にも、上記各実施形態例に示すような制御構成を設けることによって、洗濯機３１への高温湯注水を防止することができる。
【００９２】
さらに、上記各実施形態例では、洗濯注水を再開するときには、必ず、注水再開時高温湯吐出防止部５１による高温吐出防止動作を行ってから洗濯注水を再開させていたが、例えば、給湯割り込み運転に起因して洗濯注水を中断していた時間が短かった場合には、つまり、バーナ給湯燃焼により追い焚き熱交換器３の滞留湯水が加熱された時間が短かったときには、追い焚き熱交換器３内の滞留湯水の温度が注水再開時高温湯吐出の問題が生じる高温に上昇する前に、洗濯注水が再開される場合があるので、例えば、洗濯注水を中断してからの経過時間が設定の高温湯吐出危険時間に達する前に洗濯注水を再開させるときには、上記注水再開時高温湯吐出防止部５１による高温湯吐出防止動作を行わずに、洗濯機３１への浴槽湯水注水を開始させる構成としてもよい。さらに、上記洗濯注水再開時に高温湯が洗濯機３１へ吐出しても火傷を負わせてしまうというような問題が殆ど発生しないと想定される場合には、洗濯注水再開時に、上記高温湯吐出防止動作を行わない構成としてもよい。この場合には、注水再開時高温湯吐出防止部５１を省略することができる。
【００９３】
さらに、上記第１と第２の各実施形態例では、洗濯注水中断中に、バーナ５の燃焼状態が予め定めた注水再開条件を満たした状態となったと判断したときに、洗濯機３１への注水を再開させるように構成されていたが、例えば、洗濯注水を中断させた後にも引き続き洗濯機注水水温推定検出部４２による洗濯注水水温Ｔｄの推定検出動作を継続させ、この推定検出された洗濯注水水温Ｔｄが設定の注水再開温度以下に低下したことを検知したときに、洗濯注水を再開するように構成してもよい。洗濯注水中断中には追い焚き熱交換器３に通水は無いことから、追い焚き熱交換器３の通水流量を検出する流量検出手段を設け該手段の検出流量を利用して洗濯注水水温Ｔｄを推定検出する場合には、例えば、洗濯注水動作を中断する直前に検出された流量を利用して、洗濯注水中断中における洗濯注水水温Ｔｄの推定検出動作を行う。
【００９４】
さらに、洗濯注水中断中に、前記各実施形態例に示したように、バーナの燃焼状態が注水再開条件を満たした状態となったとき、あるいは、上記の如く、推定検出される洗濯機注水水温が設定の温度以下に低下したときには、洗濯注水を再開するように構成してもよい。
【００９５】
さらに、給湯運転が行われている状態から洗濯注水運転を開始する場合には、追い焚き熱交換器３内に滞留していた湯水が給湯燃焼によって高温に加熱されていることが考えられ、上記同様の高温湯吐出問題発生の虞があることから、給湯運転が行われている状態から洗濯注水運転を開始する場合にも、上記同様な高温湯吐出防止動作を行う構成を備えてもよい。
【００９６】
さらに、上記第２と第３の各実施形態例では、水を追い焚き熱交換器３を通して浴槽に流し込む給水手段は給湯側の管路により構成されていたが、例えば、浴槽湯水循環通路２３に直接的に水を流し込む上記給湯側の管路とは別個の給水手段を設けてもよい。
【００９７】
さらに、上記各実施形態例の構成に加えて、注水強制停止部４８の制御動作による洗濯注水中断中に、洗濯注水に適さない高温の浴槽湯水が洗濯機３１へ注水される虞があることから洗濯注水を中断していることを報知する手段を設けてもよい。
【００９８】
さらに、上記各実施形態例は一缶二水路燃焼機器を例にして説明したが、本発明は、例えば、一缶三水路燃焼機器等、一缶二水路以外の一缶複水路燃焼機器に適用することができる。例えば、浴槽湯水追い焚き用の追い焚き熱交換器と給湯用の給湯熱交換器と暖房用の暖房熱交換器とが一体化されている一缶三水路燃焼機器において、洗濯注水動作中に、給湯運転あるいは暖房運転によるバーナ燃焼が行われているときには、前記各実施形態例に示すように、追い焚き熱交換器から洗濯機へ注水される浴槽湯水温度に基づき浴槽注水制御動作を行うことによって、前記各実施形態例と同様な効果を奏することができる。
【００９９】
【発明の効果】
追い焚き熱交換器を通って洗濯機へ注水される浴槽湯水の水温を推定検出し、該推定検出された洗濯機注水水温が設定の注水停止温度よりも高いときには洗濯機への浴槽湯水注水を停止する構成を備えたものにあっては、洗濯機へ注水するのに適さない高温の浴槽湯水が洗濯機へ注水されるのを回避することができる。洗濯注水中に、例えば、給湯運転の割り込みが行われ、バーナが給湯燃焼している場合には、その給湯燃焼によって追い焚き熱交換器で浴槽湯水が高温に加熱されることがあり、その高温の浴槽湯水が洗濯機へ注水されると、該注水湯水の熱によって様々な問題発生の虞が生じるけれども、上記の如く洗濯機へ注水される湯水温度が上記問題発生の虞がある高温に上昇することが検知されたときに洗濯注水を強制的に停止することによって、洗濯機に高温の浴槽湯水が注水されるのを防止することができ、高温注水に起因した様々な問題発生を回避することができる。また、洗濯機へ注水される湯水温度を推定検出するので、洗濯機へ注水される湯水温度を実測するための温度検出手段を設ける必要がなく、部品点数の増加を抑制することができる。
【０１００】
さらに、追い焚き側の熱量の情報に基づいて洗濯機への注水水温を推定検出するので、例えば、追い焚き側の熱量が高くなる方向に変動した場合に、その熱量の変動による洗濯機への注水水温の変動を瞬時に検知することができ、この推定検出された洗濯機への注水水温に基づいて洗濯注水の強制停止制御動作が行われることから、熱量変動によって洗濯機への注水に適さない高温の浴槽湯水が追い焚き熱交換器から流れ出る前に、洗濯注水を強制的に停止することが可能であり、追い焚き熱交換器から洗濯機へ注水される水温を実測し該実測水温に基づいて上記同様の洗濯注水強制停止動作を制御する場合に比べて、より一層確実に洗濯機へ高温の浴槽湯水が注水されるのを防止することができる。
【０１０１】
推定検出された洗濯機注水水温又は実測された洗濯機注水水温に基づいて洗濯注水が強制的に停止された以降に、洗濯注水水温が設定の注水再開温度以下に低下したときに洗濯機への注水を再開させる構成、あるいは、バーナの燃焼状態が予め定めた注水再開条件を満たす状態となったときに洗濯機への注水を再開させる構成を備えたものにあっては、洗濯機への浴槽湯水注水を自動的に再開させることができ、使い勝手を向上させることができる。
【０１０２】
洗濯機への注水停止状態を維持させたまま循環ポンプを駆動させ、浴槽湯水を浴槽湯水循環通路を通して一時的に循環させた後に、洗濯機への注水を再開させる構成、あるいは、給水手段によって追い焚き熱交換器に水を流し込んで、追い焚き熱交換器内に滞留していた湯水を浴槽側へ排出した後に、洗濯機への注水を開始させる構成を備えたものにあっては、洗濯機への注水を中断している間にバーナ燃焼の熱によって追い焚き熱交換器内に滞留していた湯水が高温に加熱されている場合に、その高温の湯水を追い焚き熱交換器から浴槽に排出した後に、洗濯注水を再開させることができるので、洗濯注水再開時に、洗濯機に高温の湯が吐出して火傷を負わせてしまうというような問題を確実に回避することができる。
【図面の簡単な説明】
【図１】上記各実施形態例において特徴的な制御構成を示すブロック構成図である。
【図２】上記各実施形態例に示す注水再開制御部の構成例を示すブロック構成図である。
【図３】燃焼制御データの一例を示すグラフである。
【図４】図１に示す制御構成の動作例を示すフローチャートである。
【図５】一缶複水路燃焼機器の一例を示すモデル図である。
【符号の説明】
２ 給湯熱交換器
３ 追い焚き熱交換器
５ バーナ
１７ 循環ポンプ
２３ 浴槽湯水循環通路
２６ 出側温度センサ
３１ 洗濯機
３２ 注水通路
３３ 洗濯注水制御弁
４１ 追い焚き側熱量検出部
４２ 洗濯機注水水温推定検出部
４６ 注水再開制御部
４７ 洗濯注水制御部
４８ 注水強制停止部
５１ 注水再開時高温湯吐出防止部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a single-can double-water channel combustion device with a washing and pouring function capable of pouring the remaining hot water in a bathtub into a washing machine for effective use.
[0002]
[Prior art]
FIG. 5 shows an example of a system configuration of a single can double water bath water heater (apparatus) which is a single can double water channel combustion device with a washing water injection function developed by the applicant. In the figure, a hot water supply heat exchanger 2 for hot water supply and a reheating heat exchanger 3 for reheating bath water are integrated in the appliance case 1. That is, a hot water supply side water pipe is inserted through a plurality of common fin plates 4 to form a hot water supply heat exchanger 2, and a reheating side water pipe is similarly inserted through the fin plate 4 to reheat the heat exchanger 3. It is made.
[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 below the burner. 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 control for controlling the fuel gas supply amount (burner combustion heat amount) by the valve opening amount. A valve 10 is interposed. The valve opening amount control of the proportional valve 10 is specifically performed by variable control of the current (valve opening drive current) applied to the proportional valve 10.
[0004]
A water supply pipe 11 is connected to the inlet side of the hot water supply heat exchanger 2, and a water supply temperature detection sensor 12 for detecting an incoming water temperature (water supply temperature) of the hot water supply heat exchanger 2 and a water supply ( A flow rate detection sensor 13 for detecting a (hot water supply) flow rate (in the case of hot water filling) 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 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]
The inlet side of the reheating heat exchanger 3 is connected to the discharge side of the circulation pump 17 through a pipe line 16. The suction side of the circulation pump 17 and the bathtub (bath) 18 are connected to each other via a return pipe 20. The return pipe 20 detects the temperature of the bathtub hot water entering the reheating heat exchanger 3 as a bath temperature. A bath temperature sensor 21 which is a bath temperature detecting means for performing the operation and a running water sensor (running water switch) 19 for detecting running water are provided. The outlet side of the reheating heat exchanger 3 is connected to the bathtub 18 through the outgoing pipe 22, and the circulation pump 17, the pipeline 16, the reheating heat exchanger 3, and the return pipe 20 are connected from the bathtub 18. The passage returning to the bathtub 18 through the outgoing pipe 22 constitutes a bathtub hot water circulation passage 23 through which the bathtub hot water circulates.
[0007]
The hot water supply pipe 14 and the bathtub hot water circulation passage 23 (the pipe line 16 in FIG. 5) are connected to each other by a hot water filling passage 24, and the hot water filling passage 24 is constituted by an electromagnetic valve or the like for opening and closing the passage. A pouring valve 25 is interposed.
[0008]
Further, a water injection passage 32 for leading the bathtub hot water to the washing machine 31 is branched in the passage from the outlet side of the reheating heat exchanger 3 to the bathtub 18, and the branch portion is formed by, for example, a three-way valve or the like. A washing water injection control valve 33 is provided. The washing water injection control valve 33 is configured to return the hot water flowing out of the reheating heat exchanger 3 to the bathtub 18, and the washing water injection that guides the hot water flowing out of the reheating heat exchanger 3 to the washing machine 31 through the water injection passage 32. The flow of hot and cold water can be switched to the side, and is accommodated in the washing / pouring unit case 34. The washing water injection unit case 34 is provided near the place where the washing machine 31 is disposed.
[0009]
In this washing water injection unit case 34, a washing water injection start command means 35 for instructing the water injection start of bathtub hot water to the washing machine 31 and a washing water injection amount setting for setting a desired water injection amount to the washing machine 31. Means 36 are provided. The washing and pouring control valve 33, the washing and pouring unit case 34, the washing and pouring start command means 35, and the washing and pouring amount setting means 36 constitute washing and pouring means for pouring bathtub hot water into the washing machine 31 through the pouring passage 32. .
[0010]
This appliance is provided with a control device 27 for controlling the operation of the appliance, and a remote control 28 is connected to the control device 27 as a signal. The remote controller 28 has hot water supply temperature setting means for setting the hot water supply temperature, bath temperature setting means for setting the bath temperature, various operation buttons for instructing automatic operation, hot water supply operation, hot water filling operation, reheating operation, etc. A display unit or the like for displaying various information is provided.
[0011]
The control device 27 takes in various sensor detection signals and information from the remote controller 28, and performs, for example, a hot water supply operation, a hot water filling operation, a chasing operation, and a washing water injection operation in accordance with a sequence program provided therein. To control.
[0012]
For example, the flow rate detection sensor detects a flow rate of a predetermined hot water supply operating flow rate (for example, 2.5 liters / min) at which the faucet 30 of the hot water supply passage led to the kitchen or the like is opened and the hot water supply operation can be started. If detected, the combustion fan 6 is rotated, the solenoid valves 7 and 8 are opened, fuel gas is supplied to the burner 5, and combustion of the burner 5 is started by ignition of an igniter (not shown). The valve opening drive current to the proportional valve 10 is controlled so that the hot water temperature detected by the hot water temperature sensor 15 matches the hot water set temperature set by the remote controller 28, and the water passing through the hot water heat exchanger 2 is burned by the burner 5. The hot water is heated to produce a hot water having a set temperature, and this hot water is supplied to the hot water supply place through the hot water supply pipe 14. 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.
[0013]
When an automatic operation mode or a hot water filling operation mode is instructed by the remote controller 28, the hot water supply valve 25 is opened, and the hot water produced by the hot water supply heat exchanger 2 by the combustion of the burner 5 in the same manner as described above is used. 14, the hot water filling passage 24 and the bathtub hot water circulation passage 23 are sequentially supplied to the bathtub 18, and when it is determined that the bathtub water level has reached the bathtub setting water level set in the remote control 28, the pouring valve 25 is closed. The hot water filling operation is terminated.
[0014]
In the operation in the chasing operation mode, the circulating pump 17 is driven to rotate with the pouring valve 25 closed, and hot water in the bathtub 18 is circulated through the bathtub hot water circulation passage 23. When the detected bath detection temperature is lower than the bath set temperature, the burner 5 is combusted in response to the flowing water ON signal from the flowing water sensor 19, and the bathtub hot water circulating through the bathtub hot water circulation passage 23 is replenished, and the heat exchanger 3. Heat with. Then, when the bath temperature sensor 21 detects that the temperature of the bathtub hot water has reached the bath set temperature, the circulation pump 17 is stopped and the burner 5 is stopped to finish the operation in the reheating operation mode.
[0015]
In addition, the washing water injection operation is performed as follows. For example, when it is detected that the start of water injection to the washing machine 31 is instructed by the washing water injection start command means 35, the washing water injection control valve 33 is turned on the recirculation side in the state where the hot water filling operation and the reheating operation are not performed. Then, the circulation pump 17 is driven and water is poured into the washing machine 31 through the return pipe 20, the reheating pipe 3, the outgoing pipe 22, and the water injection passage 32 in this order. At this time, the bath side combustion of the burner for heating the bathtub hot water is not performed, and hot water that is not heated by the reheating heat exchanger 3 is poured into the washing machine 31. Then, when it is detected that the water injection amount set in the washing water injection amount setting means 36 has been poured into the washing machine 31, the circulation pump 17 is stopped and the washing water injection control valve 33 is moved from the laundry injection side to the circulation side. To finish the washing water injection operation.
[0016]
By providing the washing and pouring function as described above, the remaining hot water in the bathtub can be automatically poured into the washing machine 31, the effective use of the remaining hot water in the bathtub can be promoted, and a water saving effect can be obtained. Can do.
[0017]
[Problems to be solved by the invention]
However, it has been found that there is a possibility that the following problems may occur with respect to the washing and pouring operation in the canned two-water channel combustion apparatus having the washing and pouring function as described above. That is, there are cases where both a washing water injection operation and a hot water supply operation are performed. In this case, the burner 5 performs hot water combustion, so in a single-can two-water channel type combustion device, hot water supply heat exchanger 2 is produced by hot water combustion. In addition to the water flow, the water flow of the reheating heat exchanger 3 is also heated. As a result, the water temperature of the bathtub hot water poured from the reheating heat exchanger 3 to the washing machine 31 varies as shown below. In some cases, the temperature is higher than 50 ° C., which may cause a problem.
[0018]
The problem is that the hot bath water poured into the washing machine 31 may cause burns, the components of the washing machine 31 may be deformed or damaged by the bath water heat, Depending on the type of detergent, the heat of the bath water may reduce the solubility and reduce the cleaning ability, and the protein that is the dirt component of the laundry may solidify and make it difficult to remove the protein stain. There are problems such as shrinkage of clothing due to the high temperature heat and damage of clothing.
[0019]
The present invention has been made to solve the above-mentioned problems, and its object is to provide a washing water injection function capable of preventing the bath water having a temperature not suitable for washing water injection from being poured into the washing machine. It is to provide a can double water channel combustion device.
[0020]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has the following configuration as means for solving the above problems. That is, according to the first aspect of the present invention, there is provided a burner in which a reheating heat exchanger for reheating bath water and at least a heat exchanger for hot water supply are integrally provided, and the integrated heat exchanger is combusted and heated in common. Also, a bathtub hot water circulation passage for circulating the bathtub hot water through the reheating heat exchanger by driving the circulation pump is formed, and in the bathtub hot water circulation passage, the bathtub hot water is reheated and the washing machine passes through the heat exchanger. In a single-can double waterway combustion device in which a water injection passage leading to the water is branched and a washing water injection means for injecting bath water into the washing machine is provided through the water injection passage, burner combustion is performed during the washing water injection operation. Information about the amount of heat on the reheating side of the combustion heat amount of the burner, information on the flow rate of hot water flowing through the reheating heat exchanger, and information on the temperature of hot water flowing into the reheating heat exchanger A washing machine pouring water temperature estimation detecting unit for estimating and detecting the temperature of water poured into the washing machine based on preliminarily provided data for detecting detection of the washing machine pouring water temperature; When the temperature is higher than the set water injection stop temperature, the water injection forced stop unit that stops water injection to the washing machine is provided as means for solving the above-described problem.
[0021]
According to a second aspect of the present invention, a reheating heat exchanger for reheating bathtub hot water and at least a heat exchanger for hot water supply are integrally provided, and a burner for commonly heating and heating these integrated heat exchangers is provided. In addition, a bathtub hot water circulation passage for circulating the bathtub hot water through the reheating heat exchanger by driving the circulation pump is formed, and the hot water for the bathtub is recirculated to the washing machine through the heat exchanger. In a single-can double-channel combustion device in which a water injection passage is branched and a washing water injection means is provided for injecting bath water into the washing machine through the water injection passage, the hot water supply operation is interrupted during the washing water injection operation. The amount of heat on the reheating side of the combustion heat amount of the burner, the flow rate information of the hot water flowing through the reheating heat exchanger, the temperature information of the hot water flowing into the reheating heat exchanger, and A washing machine injection water temperature estimation detection unit that estimates and detects the temperature of water injected into the washing machine based on preliminarily provided data for detection detection of the washing machine injection water temperature; and the temperature of the injection water that is detected and detected is set. When the temperature is higher than the water injection stop temperature, a water injection forced stop unit that stops water injection to the washing machine is provided as means for solving the above-described problem.
[0022]
In the third aspect of the invention, in addition to the configuration of the first or second aspect of the invention, the water temperature estimation by the washing machine injection water temperature estimation detection unit continues even after the water injection to the washing machine is forcibly stopped by the water injection forced stop unit. When the water injection temperature to the washing machine that has been detected and detected is reduced below the preset water injection restart temperature, the water injection restart control unit that restarts water injection to the washing machine is provided. As a means to solve.
[0023]
According to a fourth aspect of the invention, in addition to the configuration of the first or second aspect of the invention, a water injection resumption condition in which the combustion state of the burner is predetermined after water injection to the washing machine is forcibly stopped by the water injection forced stop unit. When the condition is satisfied, the water injection resumption control unit for resuming the water injection to the washing machine is provided as means for solving the problem.
[0024]
In the fifth aspect of the invention, the water injection resumption control unit constituting the third or fourth aspect of the invention drives the circulation pump while maintaining the water injection stop state to the washing machine, and temporarily passes the bathtub hot water through the bathtub hot water circulation passage. In order to solve the above-mentioned problem, the configuration is such that the water injection to the washing machine is resumed after being circulated automatically.
[0025]
6th invention is equipped with the structure of the said 3rd or 4th invention, The water supply means which pours water and flows into a bathtub through a heat exchanger is provided, The water injection resumption control part carries out water injection to a washing machine. When resuming, water is poured into the reheating heat exchanger by the above water supply means, and after the hot water remaining in the reheating heat exchanger is discharged to the bathtub side, water injection to the washing machine is resumed. It is a means for solving the above-mentioned problems.
[0026]
7th invention is equipped with the structure of the said 5th or 6th invention, The outlet side hot water temperature detection means to detect the temperature of the hot water which flows out from a reheating heat exchanger is provided, Washing machine injection water temperature estimation detection Instead of the temperature of the water to be poured into the washing machine estimated and detected by the section, the water temperature actually measured by the outlet side hot water temperature detecting means is used as means for solving the above problem.
[0027]
In the invention having the above-described configuration, for example, when burner combustion is performed during the washing and pouring operation, the washing machine pouring water temperature estimation detecting unit calculates the water temperature of the bathtub hot water flowing from the bathtub and flowing into the washing machine via the heat exchanger. Estimate and detect. The water injection forced stop section forcibly stops water injection into the washing machine when the estimated water injection water temperature to the washing machine is higher than the preset water injection stop temperature.
[0028]
As described above, when the temperature of the water to be poured into the washing machine is higher than the set water stopping temperature, the hot water bath water that may cause various problems as described above is stopped by stopping the water injection to the washing machine. It can prevent flowing into a washing machine, and the above-mentioned subject is solved.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments according to the present invention will be described below with reference to the drawings.
[0030]
The one-can double-water channel combustion apparatus with a washing water injection function shown in the first embodiment has a system configuration similar to the one-can two-water bath water heater shown in FIG. 5, and FIG. 1 shows the first embodiment. In the example, the characteristic control configuration is indicated by a solid line. In the description of this embodiment, the description of the system configuration shown in FIG.
[0031]
As shown in FIG. 1, the characteristic control configuration in this embodiment is a combustion control unit 40, a reheating side heat quantity detection unit 41, a washing water injection water temperature estimation detection unit 42, a hot water supply interruption presence / absence monitoring unit 43, and data storage. A unit 44, a timer 45, a water injection restart control unit 46, a washing water injection control unit 47, and a water injection forced stop unit 48 are configured.
[0032]
The combustion control unit 40 controls the burner combustion operation associated with the hot water supply operation, the hot water filling operation, the reheating operation, and the like. For example, during the hot water supply operation or the hot water filling operation, the hot water supply set temperature ( The amount of heat necessary to supply hot water at a set temperature of the hot water filling is obtained, and the valve opening drive current applied to the proportional valve 10 is determined so that the water flow through the hot water supply heat exchanger 2 can obtain the obtained amount of heat. Combustion control of the burner 5 is performed under control based on combustion control data as shown by the solid line L1 and the broken line L2 in FIG.
[0033]
The solid line L1 is combustion control data composed of relationship data between the hot water supply side required heat amount and the valve opening drive current during hot water supply single operation, and the broken line L2 is the hot water supply side required heat amount and valve opening during simultaneous operation of hot water supply and reheating. Combustion control data comprising relational data with drive current. During simultaneous operation of hot water supply and reheating, burner combustion control is performed with priority on hot water supply. Both hot water heat exchanger 2 and reheating heat exchanger 3 have water flow, and the amount of burner combustion heat is equal to hot water heat exchanger 2. Therefore, if the burner 5 is not combusted at the time of simultaneous operation with a higher amount of combustion heat than that of a single operation of hot water supply, the required amount of heat on the hot water supply side is reduced. It cannot be given to the water flow of the hot water supply heat exchanger 2. From this, the combustion control data at the time of simultaneous operation as shown by the broken line L2 is given data different from the combustion control data at the time of single hot water supply operation as shown by the solid line L1 in consideration of the endothermic heat to the reheating side. .
[0034]
For example, when the amount of heat required on the hot water supply side is the heat amount Pex shown in FIG. 3, the combustion control unit 40 drives the proportional valve 10 to open based on the combustion control data indicated by the solid line L1 during the hot water supply single operation. Apply current Ia. On the other hand, during simultaneous operation, since the amount of heat is absorbed by the water passing through the reheating heat exchanger 3, the proportional valve 10 is opened more than the current Ia based on the combustion control data indicated by the broken line L2. Combustion control is performed so that the burner combustion heat amount during the simultaneous operation is greater than the burner combustion heat amount during the single hot water operation, even if the drive current Ib is applied and the required heat amount on the hot water supply side is the same.
[0035]
When the washing and pouring control unit 47 detects that the washing and pouring start command means 35 has been operated to instruct the start of pouring bath water into the washing machine 31, the hot water filling operation and the chasing operation are not performed. The washing water injection control valve 33 is switched from the recirculation side to the laundering water side, the circulation pump 17 is activated, and the hot water in the bathtub 18 is returned to the return pipe 20, the reheating heat exchanger 3, the forward pipe 22, and the water injection path 32. In turn, water is poured into the washing machine 31, and then the circulation pump 17 is stopped when the amount of water injected into the washing machine 31 reaches the amount of water set in the washing water injection amount setting means 36. The control valve 33 is switched from the washing water injection side to the recirculation side, and the water injection operation to the washing machine 31 is completed.
[0036]
Various methods are conceivable as a method for detecting that the amount of water injected into the washing machine 31 has reached the set water injection amount. An example is shown below. For example, the relationship between the amount of water to be poured and the time required for pouring the amount of pouring water into the washing machine 31 is obtained in advance by experiments or calculations in consideration of the capacity of the circulation pump 17, and the results of the obtained experiments (calculations) are obtained. Based on the preset water injection amount and the time required for pouring the water injection amount into the washing machine 31, data relating to the predetermined time is stored in the data storage unit 44, and the laundry water injection control unit 47 issues a command to start washing water injection. Is detected based on the information on the amount of water injected to the washing machine 31 set in the washing water injection amount setting means 36 and the relational data stored in the data storage unit 44. The time required for pouring the amount of water into the washing machine 31 is obtained, and the obtained time is set in the timer 45.
[0037]
The washing water injection control unit 47 starts driving the timer 45 almost simultaneously with the start of water injection to the washing machine 31. When the timer 45 expires, the amount of bathtub hot water injection to the washing machine 31 is increased. It is determined that the set water injection amount has been reached, and the laundry water injection controller 47 ends the laundry water injection operation as described above.
[0038]
The hot water supply interruption presence / absence monitoring unit 43 takes in the operation information of the washing and pouring control unit 47 momentarily, and while detecting that the washing and pouring operation is performed based on the information, the operation information of the combustion control unit 40 is detected. Based on the sensor output information of the flow rate detection sensor 13, it is monitored whether there is an interruption in hot water supply operation.
[0039]
The reheating side heat quantity detection unit 41 takes in the monitoring information of the hot water supply interruption presence / absence monitoring unit 43 and the operation information of the washing water injection control unit 47 from time to time, and a hot water supply interruption is performed during the washing water injection operation based on the acquired information. During the detection, the amount of heat absorbed by the water passing through the reheating heat exchanger 3 in the burner combustion heat amount is obtained every moment as the reheating side heat amount.
[0040]
The specific example of the detection method of the reheating side calorie | heat amount is shown. For example, the amount of heat obtained by subtracting the amount of heat absorbed by the water passing through the hot water supply heat exchanger 2 from the combustion heat amount Pall of the burner 5 is the reheating side heat amount, and the burner 5 is based on the valve opening drive current applied to the proportional valve 10. When the detected water temperature of the feed water temperature detection sensor 12 is Tin, the detected flow rate of the flow rate sensor 13 is Q, and the detected temperature of the hot water temperature sensor 15 is Tout. Since the water absorption heat absorption amount Pq of the hot water supply heat exchanger 2 can be obtained by the following equation (1), the reheating side heat amount Ph can be obtained by the arithmetic expression of the following equation (2).
[0041]
Pq = (Tout−Tin) × Q (1)
[0042]
Ph = Pall−Pq = Pall− (Tout−Tin) × Q (2)
[0043]
From the above, the above equation (2) is stored in the data storage unit 44 as detection data for the reheating-side heat quantity Ph, and the burner combustion heat quantity based on the valve opening drive current is used as the parameter Pall to detect the feed water temperature. Substituting the feed water temperature detected by the sensor 12 for the parameter Tin, the detected flow rate of the flow rate detection sensor 13 for the parameter Q, and the detected temperature of the hot water supply temperature sensor 15 for the parameter Tout, respectively, and calculating according to the above equation (2) By doing so, the reheating side heat amount Ph can be calculated.
[0044]
The reheating side heat quantity detection unit 41 outputs the reheating side heat quantity information calculated as described above to the washing machine pouring water temperature estimation detection unit 42.
[0045]
When the washing machine pouring water temperature estimation detection unit 42 receives the information on the reheating side heat quantity from the reheating side heat quantity detection unit 41, the information, the temperature information of the bath water flowing into the reheating heat exchanger 3, and the reheating process. The temperature of the hot water flowing out of the reheating heat exchanger 3 (washing machine) based on the information on the water flow rate of the heat exchanger 3 and the data for estimating and detecting the washing machine pouring water temperature stored in the data storage unit 44 in advance. (Water injection temperature) Td is estimated and detected every moment.
[0046]
In this example embodiment, the data for estimating and detecting the washing water injection water temperature is composed of arithmetic expression data shown in the following expression (3).
[0047]
Td = Th + (Ph / Qh) (3)
[0048]
However, Th shown in the above equation (3) represents the temperature of the hot water in the bathtub flowing into the reheating heat exchanger 3, Ph represents the reheating side heat quantity, and Qh represents the water flow rate of the reheating heat exchanger 3. Yes.
[0049]
In this embodiment, the minimum flow rate (for example, 4 liters / min) at which running water can be detected by the running water sensor 19 is given in advance to the above equation (3) as the water flow rate Qh of the reheating heat exchanger 3. The detected water temperature of the bath temperature sensor 21 is substituted for the parameter Th in the above equation (3), and the reheating side heat quantity obtained by the reheating side heat quantity detecting unit 41 is substituted for the parameter Ph. ), The washing machine pouring water temperature Td flowing out from the reheating heat exchanger 3 and poured into the washing machine 31 is estimated and detected.
[0050]
When the washing machine pouring water temperature estimation detecting unit 42 obtains the washing machine pouring water temperature Td as described above, it outputs information on the obtained washing machine pouring water temperature Td to the water pouring forced stop unit 48. The forced water injection stop unit 48 compares the added washing machine water injection temperature Td with the hot water supply stop temperature Tstop (for example, 50 ° C.) stored in the data storage unit 44 in advance, and the estimated washing water injection water temperature is detected. It is determined whether or not Td is higher than the pouring stop temperature Tstop.
[0051]
When the washing machine pouring water temperature estimation detecting unit 42 determines that the washing machine pouring water temperature Td is higher than the pouring stop temperature Tstop, the bath water temperature poured into the washing machine exceeds the range of water temperature suitable for washing pouring. Since there is a possibility that various problems such as those described above caused by injecting bath water with an inappropriately high hot water temperature into the washing machine 31 may occur. Therefore, it is determined that the water injection to the washing machine 31 needs to be forcibly stopped, the circulation pump 17 is stopped, and the washing water injection control valve 33 is switched from the washing water injection side to the recirculation side, thereby washing The bath water injection into the machine 31 is forcibly stopped. At this time, the water injection forced stop unit 48 interrupts the driving of the timer 45.
[0052]
By the way, in this embodiment, as described above, the washing machine pouring water temperature estimation detection unit 42 uses the lowest flow rate at which the running water sensor 19 can detect running water during hot water combustion of the burner. Td is estimated and detected. In this case, the highest temperature in the range of the washing machine pouring water temperature assumed under the condition that the state other than the flow rate is the same is estimated and detected as the washing machine pouring water temperature Td. Since the forced water injection stop control operation by the water injection forced stop unit 48 is performed based on the water temperature, it is possible to more reliably prevent hot water having an inappropriate hot water temperature from being poured into the washing machine 31, and safety. Can be increased.
[0053]
The water injection resumption control unit 46 takes in the operation information of the water injection forced stop unit 48 and burns after detecting that water injection is forcibly stopped by the water injection forced stop unit 48 during the washing water injection operation based on the information. Based on the information of the control unit 40 or the monitoring information of the hot water supply interruption presence / absence monitoring unit 43, when it is detected that the combustion state of the burner 5 satisfies a predetermined water injection resumption condition shown below, It is determined that the bath water having a suitable temperature has been restored to a state in which water can be poured into the washing machine 31, and the washing / pouring operation is resumed.
[0054]
In this embodiment, the following two conditions are given as the water injection restart condition, and when either one of the conditions is satisfied, the water injection to the washing machine 31 is restarted. Has been.
[0055]
First, the first condition is that hot water combustion in the burner 5 is stopped, and the second condition is that the required amount of heat on the hot water supply side has decreased to the preset water injection restarting heat amount. The water resumption heat amount set as described above may be determined in advance, or may be variably set according to the temperature of the bath water.
[0056]
By the way, the hot water staying in the reheating heat exchanger 3 while the washing / pouring operation is interrupted is heated by the hot water combustion of the burner, and may be very high due to this heating. Thus, when the hot water in the reheating heat exchanger 3 heated to a high temperature flows out directly to the washing machine 31 by resuming the washing and pouring, problems such as the risk of causing burns due to the hot water are generated. Conceivable. Therefore, in this embodiment, as shown in FIG. 2, the water injection resumption control unit 46, in addition to the resumption permission determination unit 50 that determines whether or not the water injection resumption condition is satisfied as described above, The discharge prevention part 51 and the resumption part 52 are comprised, and the structure which prevents the high temperature hot water discharge problem to the washing machine 31 at the time of the said washing water injection resumption is provided.
[0057]
As described above, the restart permission determination unit 50 monitors whether or not the combustion state of the burner satisfies the water injection resumption condition while the washing water injection is interrupted, and the burner combustion state satisfies the water injection resumption condition. When it is determined that the washing has started, a laundry pouring resumption permission signal is output to the hot water discharge prevention unit 51 when resuming pouring.
[0058]
Upon receiving the washing pouring resumption permission signal, the hot water discharge preventing unit 51 at the time of resuming pouring starts the circulation pump 17 while the washing pouring control valve 33 is switched to the recirculation side. The hot water in the bathtub hot water circulation passage 23 flows by the activation of the circulation pump 17, and the hot water remaining in the reheating heat exchanger 3 can be discharged to the bathtub 18.
[0059]
The hot water discharge prevention unit 51 has a built-in timer 53 at the time of resuming water injection, and until the hot water remaining in the reheating heat exchanger 3 is completely discharged to the bathtub 18 after the circulation pump 17 is started as described above. When the built-in timer 53 is set to the time required for the above-mentioned time, the built-in timer 53 is started and the built-in timer 53 is driven at the same time as described above. In addition, the high-temperature hot water staying in the reheating heat exchanger 3 is discharged into the bathtub 18, and even if the washing and pouring operation is resumed, the high-temperature hot water that may cause problems such as the risk of burns is washed in the washing machine. Therefore, the circulation pump 17 is stopped, and a washing / pouring water resuming instruction is output to the resuming unit 52.
[0060]
When the resuming part 52 receives the washing / pouring water resuming instruction, the refilling control valve 33 is switched from the circulation side to the washing / pouring side, the circulation pump 17 is activated, and the washing / pouring operation is resumed.
[0061]
In addition, at the time of hot water supply interruption operation in washing pouring water, a part of the burner combustion heat amount is absorbed by the water flow of the reheating heat exchanger 3, so that the combustion control unit 40 performs the same combustion control as in the simultaneous operation. become.
[0062]
The characteristic control configuration of the first embodiment is configured as described above, and an example of a control operation for washing and pouring water will be briefly described below based on the flowchart of FIG.
[0063]
First, when the washing water injection start command means 35 is operated and it is detected that a washing water injection start command is issued (step 101), the washing water injection control unit 47 is in a state where the hot water filling operation and the chasing operation are not performed. Thus, the washing water injection control valve 33 is switched from the circulation side to the washing water injection side, the circulation pump 17 is activated to start water injection of the bath water into the washing machine 31, and the timer 45 is set and driven (step) 102).
[0064]
After the circulation pump 17 is started, it is determined whether or not the flowing water by the pump drive can be detected by the flowing water sensor 19 (step 103), and when it is determined that the water injection cannot be detected by the flowing water sensor 19, the circulation is performed. It is determined whether or not the elapsed time since the start of the pump 17 has reached the set time for determining the presence or absence of hot water in the bathtub (step 112), and the water flow sensor 19 even though the elapsed time has exceeded the set time. When it is determined that the flowing water cannot be detected, it is determined that there is no hot water in the bathtub 18 and therefore the washing and pouring cannot be performed, and the circulation pump 17 is stopped (step 113).
[0065]
In addition, when the running water sensor 19 detects running water after the circulation pump 17 is started and before the set time for determining whether there is bathtub hot water or not, it is determined that the washing water injection of the bathtub hot water has started smoothly. It is determined whether or not a hot water supply interrupt has been started based on the operation information of the hot water supply interrupt presence / absence monitoring unit 43 during pouring (step 104). When it is determined that there is no hot water supply interruption, it is determined whether or not the timer 45 has expired (step 110). When it is determined that the timer has not expired, the amount of water injected into the washing machine 31 has reached the set amount of water injection. Therefore, the operation after step 103 is repeatedly performed to continue the washing and pouring operation.
[0066]
When it is determined that there has been an interruption of hot water supply during washing and pouring water, the reheating side heat amount Ph is calculated by the reheating side heat amount detection unit 41, and the calculated reheating side heat amount Ph and the detected temperature Th of the bath temperature sensor 21 are calculated. And the washing machine pouring water temperature estimation detection unit 42 estimates and detects the washing machine pouring water temperature Td that flows out of the reheating heat exchanger 3 and is poured into the washing machine 31 based on the estimation detection data of the washing machine pouring water temperature. (Step 105).
[0067]
Then, it is determined whether or not the estimated and detected water injection water temperature Td is higher than the water injection stop temperature Tstop (step 106), and when it is determined that the washing machine water injection water temperature Td is equal to or lower than the water injection stop temperature Tstop, The water temperature poured into the washing machine 31 is determined to be a water temperature suitable for washing water pouring, and if the timer 45 is not up, the washing water pouring operation is continued.
[0068]
When it is determined that the estimated and detected washing water pouring water temperature Td is higher than the water pouring stop temperature Tstop, it is determined that various problems as described above may occur due to the higher hot water temperature, and the water pouring forced stop unit 48 is determined. Thus, the circulation pump 17 is stopped, the washing / pouring control valve 33 is switched from the washing / pouring side to the recirculation side, the washing / pouring operation is interrupted, and the driving of the timer 45 is also interrupted (step 107).
[0069]
Thereafter, the resumption permission determination unit 50 of the water injection resumption control unit 46 determines whether or not the burner combustion state satisfies the water injection resumption condition (step 108), and when it is determined that the water injection resumption condition is not satisfied. Continue to monitor the burner combustion state while maintaining the interruption of washing water injection. When it is determined that the water injection resumption condition is satisfied, the high temperature discharge prevention operation by the hot water discharge prevention unit 51 at the time of resuming water injection, that is, the washing water injection control valve 33 is switched to the recirculation circulation side, and the circulation pump 17 Is driven for a predetermined time, and the operation of discharging the accumulated hot water in the reheating heat exchanger 3 heated by the hot water combustion of the burner to the bathtub 18 is performed, and the reheating heat exchanger 3 heated to a high temperature is discharged. The staying hot water is prevented from being discharged to the washing machine 31 when the laundry pouring is resumed.
[0070]
After the high-temperature discharge operation is completed, the operations after Step 102 are repeated, water injection of bathtub water into the washing machine 31 is resumed, and the timer 45 is redriven. Thereafter, when it is determined that the timer 45 has timed out, it is determined that the water injection amount to the washing machine 31 has reached the set water injection amount, the laundry water injection control unit 47 stops the circulation pump 17, and the laundry water injection control is performed. The valve 33 is switched from the washing / pouring side to the recirculation side (step 111), and the washing / pouring operation is terminated (step 114).
[0071]
According to this embodiment, when there is a hot water supply interruption during the washing water injection operation and the burner is performing hot water combustion, the washing water injection water temperature Td for water injection from the reheating heat exchanger 3 to the washing machine 31 is estimated. If the detected and water temperature Td of the washing machine detected and detected is higher than the preset water injection stop temperature Tstop, the hot water injection into the washing machine 31 is forcibly stopped. Bath hot water having a hot water temperature higher than 50 ° C. is not poured into the washing machine 31, and it is possible to prevent the occurrence of problems due to hot water supply interruption during the washing water pouring operation.
[0072]
Further, since the temperature of hot water poured into the washing machine 31 is estimated and detected as described above, there is no need to provide a temperature sensor or the like for actually measuring the temperature of water poured into the washing machine 31, and an increase in the number of parts is prevented. be able to.
[0073]
Further, since the washing machine pouring water temperature Td is estimated and detected in consideration of the reheating side heat quantity, when the reheating side heat quantity fluctuates with the fluctuation of the burner combustion heat quantity, the washing machine pouring water temperature after the heat quantity fluctuation is obtained. Td is estimated and detected instantaneously, and the washing and pouring water control operation is performed based on the estimated and detected washing machine pouring water temperature Td. It is possible to reliably stop washing and pouring before flowing.
[0074]
On the other hand, when the temperature of hot water poured into the washing machine 31 is measured by, for example, a temperature sensor and the same water injection forced stop control operation as described above is performed based on the measured water temperature, When unsuitable hot water is made in the reheating heat exchanger 3, if the inappropriate hot water bath water does not actually flow out of the reheating heat exchanger 3, the washing water injection is stopped. Therefore, it is considered that the stop of washing and pouring water is delayed. Of course, the delay of the stop operation is slight and seems to be almost no hindrance. However, as shown in the present embodiment, the construction is such that the washing water injection water temperature Td is estimated and detected. In addition, it is possible to prevent the hot water bath water not suitable for washing water from being poured into the washing machine 31.
[0075]
Furthermore, in this embodiment, the water injection resumption control unit 46 includes the hot water discharge prevention unit 51 at the time of resuming water injection, so that hot water staying in the heat exchanger 3 is replenished by hot water combustion of the burner while washing water injection is interrupted. Is heated to a high temperature, after the heated hot water is replenished and discharged from the heat exchanger 3 to the bathtub 18, water injection into the washing machine 31 is started. It is possible to prevent the hot water from being poured into the washing machine 31 directly, and to reliably avoid the problem of causing burns due to the hot water in the hot water when the washing water is resumed. it can. Of course, during the washing and pouring operation, since no one is usually bathing, as described above, even when hot water is discharged to the bathtub 18 at the time of resuming water pouring, the hot water is bathing. There is almost no problem of causing burns.
[0076]
The second embodiment will be described below. What is characteristic in this embodiment is that when washing water injection is resumed, the circulating pump 17 is driven to discharge the hot water remaining in the reheating heat exchanger 3 to the bathtub 18 and then to the washing machine 31. Instead of re-injecting the hot water in the bathtub, the water is poured into the hot water circulation passage 23 from the hot water supply side, and the hot water staying in the heat exchanger 3 is exhausted by the water and discharged into the bathtub 18. This is provided with a configuration for restarting the pouring of bathtub water into the washing machine 31. The rest of the configuration is almost the same as the configuration shown in the first embodiment, and a duplicate description of the common parts is omitted.
[0077]
In this embodiment, it is determined as a water injection resumption condition that the hot water supply interruption operation ends and the combustion of the burner 5 stops during the washing water injection interruption, and the resumption permission determination unit 50 of the water injection resumption control unit 46 When it is detected that the hot water supply interrupting operation has ended and the combustion of the burner 5 has stopped while the washing water injection is interrupted, it is determined that the burner state in which the water injection of the bathtub hot water into the washing machine 31 can be resumed is established. A washing pouring resumption permission signal is output to the hot water discharge prevention unit 51 when refilling water.
[0078]
When the washing pouring resumption permission signal is added, the hot water discharge preventing unit 51 at the time of resuming pouring opens the pouring valve 25 while keeping the washing pouring control valve 33 switched to the circulation side, and pouring hot water. A combustion inhibition signal is output to the combustion control unit 40 so that burner combustion is not performed even if the valve 25 is opened, the burner combustion is inhibited, and unheated water is supplied from the hot water supply heat exchanger 2 to the hot water supply pipe 14. The hot water is poured into the bathtub hot water circulation passage 23 through the hot water passage 24 in order, and the hot water staying in the heat exchanger 3 is discharged by this water flow to the bathtub 18. In this embodiment, the water supply pipe 11, the hot water supply heat exchanger 2, the hot water supply pipe 14, the hot water filling passage 24, and the pouring valve 25 constitute water supply means for replenishing water and flowing into the bathtub 18 through the heat exchanger 3. ing.
[0079]
The hot water discharge prevention unit 51 at the time of resuming water injection has a built-in timer 53 in which the amount of water supplied from the hot water supply side to the bathtub hot water circulation passage 23 is a predetermined water supply amount (that is, a reheating heat exchanger). 3 is set to the time required to reach the amount of water required to discharge the hot water remaining in the bath 18 to the bathtub 18), and the water from the hot water supply side to the bathtub hot water circulation passage 23 is set. When the timer 53 is started, the timer 53 is driven. After that, when the timer 53 expires, it is determined that the hot water remaining in the reheating heat exchanger 3 has been discharged to the bathtub 18, The valve 25 is closed, and the water supply operation from the hot water supply side to the bathtub hot water circulation passage 23 is completed. Alternatively, after the water supply from the hot water supply side to the bathtub hot water circulation passage 23 is started, the detected flow rate of the flow rate detection sensor 13 is accumulated to calculate the water supply amount to the bathtub hot water circulation passage 23 side, and the calculated water supply amount When the water reaches the predetermined water supply amount, it is determined that the hot water remaining in the reheating heat exchanger 3 has been discharged to the bathtub 18 in the same manner as described above, and the pouring valve 25 is closed and the hot water supply side The water supply operation to the bathtub hot water circulation passage 23 may be terminated.
[0080]
The hot water discharge preventing unit 51 at the time of resuming water injection outputs the washing water resuming instruction to the resuming unit 52 after the water supply operation is finished as described above, and the resuming unit 52 causes the hot water to be poured into the washing machine 31. Let it resume.
[0081]
According to this embodiment, as in the first embodiment, when the hot water supply interruption operation is performed during washing pouring, the washing water pouring water temperature estimation detection unit 42 causes the reheating heat exchanger 3 to Since the washing water pouring water temperature Td to be poured into the washing machine 31 is estimated and detected, and the washing water pouring operation is stopped when the estimated washing water pouring water temperature Td is higher than the set water pouring stop temperature Tstop. As in the first embodiment, there is an effect that it is possible to surely prevent hot water having an inappropriate temperature to be poured into the washing machine 31 from being poured into the washing machine 31. Can do.
[0082]
In addition, when reinjecting water into the washing machine 31, water is poured into the bathtub hot water circulation passage 23, the hot water remaining in the reheating heat exchanger 3 is discharged to the bathtub 18, and then supplied to the washing machine 31. Since the hot water injection in the bathtub is resumed, even if hot water heated by the hot water supply combustion stays in the heat exchanger 3 while the washing water injection is interrupted, the hot water is discharged into the bathtub 18 and thereafter In addition, since the hot water injection of the bathtub is resumed, it is possible to prevent the occurrence of a problem such that hot water is discharged to the washing machine 31 and burns are caused when the laundry water injection is resumed.
[0083]
The third embodiment will be described below. In this embodiment, as shown by the dotted line in FIG. 5, an outlet side temperature sensor 26 is provided which is an outlet side hot water temperature detecting means capable of detecting the temperature of hot water flowing out from the reheating heat exchanger 3. In this case, instead of performing an estimated detection of the temperature of water poured into the washing machine 31 and performing the washing water injection forced stop control based on the estimated washing water injection water temperature, the temperature is measured by the outlet temperature sensor 26. That is, the washing water injection forced stop control is performed based on the washing machine water injection temperature Td, and other configurations are the same as those in each of the above-described embodiments, and redundant description of common parts is omitted.
[0084]
In this embodiment, the water injection forced stop unit 48 takes in the water injection water temperature measured by the outlet side temperature sensor 26 while the hot water supply interruption operation is being performed. Comparing the actually measured washing machine pouring water temperature Td that has been taken in with the preset water pouring stop temperature Tstop, when it is determined that the measured washing machine pouring water temperature Td is higher than the water pouring stop temperature Tstop, the construction is such that the water pouring to the washing machine 31 is stopped. I have.
[0085]
As described above, since the actual washing water injection water temperature of the outlet side temperature sensor 26 is used, in this embodiment, the reheating side heat quantity detection unit 41 for estimating and detecting the washing machine water injection water temperature and the washing machine water injection water temperature. The estimation detection unit 42 can be omitted, and the control configuration can be simplified.
[0086]
Also in this embodiment example, in order to avoid the high temperature hot water discharge problem at the time of resuming the washing water injection, the water injection resuming control unit 46 as shown in each of the above embodiment examples is provided. It has a configuration in which high temperature hot water is discharged to the machine 31 and problems such as burns can be reliably avoided.
[0087]
The present invention is not limited to the above embodiments, and various embodiments can be adopted. For example, in each of the first and second embodiments, from the viewpoint of safety, the washing machine pouring water temperature Td is estimated and detected using the lowest flow rate that can be detected by the running water sensor 19, A flow rate detecting means capable of detecting the water flow rate of the reheating heat exchanger 3 is provided, and the washing machine pouring water temperature Td is determined using the water flow rate of the reheating heat exchanger 3 detected by the flow rate detecting means. It may be estimated and detected.
[0088]
Moreover, in each said embodiment, although the timing of washing | cleaning water injection operation | movement completion was determined using the timer 45, the flow rate detection means which can detect the flow volume of the hot water which flows into the washing machine 31, for example is provided, When water injection to the washing machine 31 is started and then the flow rate detected by the flow rate detection means is integrated to calculate the amount of water injection to the washing machine 31, and when the calculated water injection amount reaches the set water injection amount The water pouring operation to the washing machine 31 may be terminated.
[0089]
Further, in each of the above embodiments, the washing water injection start command means 35 and the washing water injection amount setting means 36 are provided separately. For example, the washing water injection start instruction means 35 and the washing water injection amount setting means 36 are provided. The following manual timer may also be provided. The manual timer has a scale portion with a scale corresponding to the amount of water injected into the washing machine 31, and the timer is manually rotated and set by the amount corresponding to the desired amount of water injection. The water injection amount to the washing machine 31 is set, and a washing water injection start command is issued.
[0090]
Further, in each of the above-described embodiments, when water is poured into the washing machine, the bath side combustion of the burner is not performed, and bath water that is not heated by the reheating heat exchanger 3 is poured into the washing machine 31. For example, the burner combustion control may be performed so that the burner is burned at the time of washing water pouring, and hot water having an optimum temperature for washing (for example, 30 to 40 ° C.) is poured into the washing machine 31. Furthermore, for example, it is desirable to wash with hot water at a temperature of about 40 ° C. for cotton products, about 30 to 35 ° C. for hair and silk products, and about 30 to 40 ° C. for synthetic fiber products. Since the washing hot water temperature suitable for washing differs for each type of item, a configuration for controlling the temperature of hot water poured into the washing machine 31 according to the type of the laundry may be provided.
[0091]
As described above, when bath water is heated during washing and pouring, when a hot water interruption occurs during the washing and pouring, burner combustion is performed so that hot water at a preset hot water temperature can be supplied from the viewpoint of hot water supply priority. Therefore, the bath water poured from the reheating heat exchanger 3 to the washing machine 31 is considered to have a high temperature as described above. By providing a control configuration as shown in the embodiment, hot water pouring into the washing machine 31 can be prevented.
[0092]
Further, in each of the above-described embodiments, when restarting washing water injection, the hot water discharge prevention operation by the hot water discharge preventing unit 51 at the time of resuming water injection is always resumed, but for example, hot water supply interruption operation When the time during which the washing water injection is interrupted due to the short period is short, that is, when the time during which the accumulated hot water in the reheating heat exchanger 3 is heated by the burner hot water combustion is short, the reheating heat exchanger 3 Laundry pouring may be resumed before the temperature of the accumulated hot water rises to a high temperature that causes problems with hot water discharge when resuming pouring. When resuming the washing water injection before reaching the hot water discharge danger time, the hot water discharge preventing operation by the high temperature hot water discharge preventing unit 51 at the time of resuming the water injection is not performed, and bath water pouring into the washing machine 31 is started. It may be configured to. Furthermore, when it is assumed that there is almost no problem that burns are caused even if hot water is discharged to the washing machine 31 when the washing water injection is resumed, the hot water hot water discharge prevention is performed when the laundry water injection is resumed. It is good also as a structure which does not perform operation | movement. In this case, the hot water discharge preventing unit 51 at the time of resuming water injection can be omitted.
[0093]
Further, in each of the first and second embodiments, when it is determined that the combustion state of the burner 5 satisfies a predetermined water injection resumption condition during the interruption of washing water injection, Although the water injection is configured to resume, for example, after the laundry water injection is interrupted, the washing water injection water temperature estimation detection unit 42 continues the detection operation of the water injection water temperature Td, and this estimated and detected laundry is continued. You may comprise so that washing water injection may be restarted when it detects that the water injection water temperature Td fell below the preset water injection restart temperature. Since there is no water flow through the reheating heat exchanger 3 during the interruption of the washing water injection, a flow rate detecting means for detecting the water flow rate of the reheating heat exchanger 3 is provided, and the temperature of the washing water injection water is detected using the detected flow rate of the means. In the case of estimating and detecting Td, for example, using the flow rate detected immediately before the laundry pouring operation is interrupted, an estimation detecting operation of the laundry pouring water temperature Td during the laundry pouring interruption is performed.
[0094]
Further, as shown in the above embodiments, when the washing water injection is interrupted, when the combustion state of the burner satisfies the water injection resumption condition, or as described above, the washing water injection water temperature estimated and detected. When the temperature drops below the set temperature, washing water injection may be resumed.
[0095]
Furthermore, when starting the washing and pouring operation from the state where the hot water supply operation is performed, it is considered that the hot water staying in the reheating heat exchanger 3 is heated to a high temperature by hot water combustion. Since there is a possibility that the same hot water discharge problem may occur, a configuration for performing the same hot water discharge prevention operation as described above may be provided even when the washing and pouring operation is started from the state where the hot water supply operation is performed.
[0096]
Further, in each of the second and third embodiments, the water supply means for replenishing water and flowing into the bathtub through the heat exchanger 3 is constituted by a hot water supply side pipe line. You may provide the water supply means separate from the said hot water supply side pipe line which pours water directly.
[0097]
Furthermore, in addition to the configuration of each embodiment described above, hot water bath water that is not suitable for washing water injection may be poured into the washing machine 31 during the interruption of washing water injection by the control operation of the water injection forced stop unit 48. You may provide the means to alert | report that the washing water injection is interrupted.
[0098]
Furthermore, although each said embodiment demonstrated and demonstrated the canned two water channel combustion apparatus as an example, this invention is applied to one can double channel combustion apparatus other than one can two water channels, such as a can three water channel combustion apparatus, for example. can do. For example, in a canned three-water channel combustion device in which a reheating heat exchanger for reheating bath water, a hot water supply heat exchanger for hot water supply, and a heating heat exchanger for heating are integrated, during washing water injection operation, When burner combustion is performed by hot water supply operation or heating operation, as shown in each of the above-described embodiments, by performing bathtub water injection control operation based on the temperature of the hot water in the bathtub poured into the washing machine from the reheating heat exchanger The same effects as those in the above embodiments can be obtained.
[0099]
【The invention's effect】
Estimate and detect the temperature of the hot water in the bathtub poured into the washing machine through the reheating heat exchanger, and if the estimated detected temperature of the washing machine infused water is higher than the preset water injection stop temperature, the hot water in the bathtub is poured into the washing machine. In the case of having the configuration for stopping, it is possible to avoid the hot bath water that is not suitable for pouring water into the washing machine from being poured into the washing machine. For example, when a hot water supply operation is interrupted during washing and pouring water, and the burner is hot water burning, the hot water combustion may heat the bathtub hot water to a high temperature in the reheating heat exchanger. When the hot water in the bathtub is poured into the washing machine, various problems may occur due to the heat of the poured water, but the temperature of the hot water poured into the washing machine rises to a high temperature at which the above problems may occur as described above. By forcibly stopping washing water injection when it is detected, hot bath water can be prevented from being poured into the washing machine, and various problems caused by high temperature water injection can be avoided. be able to. Further, since the temperature of hot water poured into the washing machine is estimated and detected, it is not necessary to provide temperature detecting means for actually measuring the temperature of hot water poured into the washing machine, and an increase in the number of parts can be suppressed.
[0100]
Furthermore, since the temperature of the water to be poured into the washing machine is estimated and detected based on the information on the amount of heat on the reheating side, for example, when the heat amount on the reheating side fluctuates in the direction of increasing, Since fluctuations in the water temperature can be detected instantaneously and the forced stop control operation for washing water injection is performed based on the estimated water temperature in the washing machine, it is suitable for water injection into the washing machine due to heat fluctuations. It is possible to forcibly stop washing water before the hot water from the hot water bath flows out of the reheating heat exchanger, and the temperature of water poured from the reheating heat exchanger to the washing machine is measured to obtain the measured water temperature. On the basis of this, it is possible to more reliably prevent hot bath water from being poured into the washing machine, as compared with the case of controlling the same forced washing stop operation as described above.
[0101]
After washing water injection is forcibly stopped based on the estimated washing machine water injection temperature or the measured washing machine water injection temperature, when the washing water injection temperature falls below the preset water injection restart temperature, In the case of having a structure for resuming water injection or a structure for resuming water injection to the washing machine when the combustion state of the burner reaches a predetermined water injection resumption condition, the bathtub to the washing machine Hot water injection can be automatically restarted, and usability can be improved.
[0102]
The structure is such that the circulation pump is driven while the water injection stop state to the washing machine is maintained and the bathtub hot water is temporarily circulated through the bathtub hot water circulation passage, and then water injection to the washing machine is resumed or the water supply means is used. Washing machines that have a structure that starts pouring water into the washing machine after pouring water into the soaking heat exchanger and discharging hot water remaining in the reheating heat exchanger to the bathtub When hot water staying in the reheating heat exchanger is heated to a high temperature due to the heat of the burner while the water injection to the hot water is interrupted, the hot water is reheated from the heat exchanger to the bathtub. Since the laundry pouring can be resumed after discharging, it is possible to reliably avoid the problem that hot water is discharged to the washing machine and burns are caused when the laundry pouring is resumed.
[Brief description of the drawings]
FIG. 1 is a block configuration diagram showing a characteristic control configuration in each of the above embodiments.
FIG. 2 is a block configuration diagram showing a configuration example of a water injection resumption control unit shown in each embodiment.
FIG. 3 is a graph showing an example of combustion control data.
4 is a flowchart showing an operation example of the control configuration shown in FIG. 1. FIG.
FIG. 5 is a model diagram showing an example of a single can multiple water channel combustion device.
[Explanation of symbols]
2 Hot water heat exchanger
3 Reheating heat exchanger
5 Burner
17 Circulation pump
23 Bath water circulation passage
26 Outlet temperature sensor
31 Washing machine
32 Water injection passage
33 Washing water injection control valve
41 Reheating side heat quantity detector
42 Washing machine water injection temperature estimation detector
46 Water injection resumption control unit
47 Washing water injection control unit
48 Water injection forced stop
51 Hot water discharge prevention part when refilling water

Claims (7)

浴槽湯水追い焚き用の追い焚き熱交換器と少なくとも給湯用の熱交換器とが一体的に設けられ、それら一体化した熱交換器を共通に燃焼加熱するバーナが設けられており、また、浴槽湯水を循環ポンプの駆動により上記追い焚き熱交換器を通して循環させる浴槽湯水循環通路が形成され、この浴槽湯水循環通路には浴槽湯水を追い焚き熱交換器を通して洗濯機へ導く注水通路が分岐形成されており、該注水通路を通して洗濯機に浴槽湯水を注水する洗濯注水手段が設けられている一缶複水路燃焼機器において、洗濯注水動作中に、バーナ燃焼が行われているときには、バーナの燃焼熱量のうちの追い焚き側の熱量の情報と、追い焚き熱交換器を流れる湯水の流量情報と、追い焚き熱交換器に流れ込む湯水の湯温情報と、予め与えられた洗濯機注水水温の推定検出用データとに基づいて、洗濯機に注水される水温を推定検出する洗濯機注水水温推定検出部と；推定検出された洗濯機への注水水温が設定の注水停止温度よりも高いときには洗濯機への注水を停止する注水強制停止部と；が設けられていることを特徴とする洗濯注水機能付き一缶複水路燃焼機器。A reheating heat exchanger for reheating the hot water in the bathtub and at least a heat exchanger for supplying hot water are integrally provided, and a burner for commonly heating and heating the integrated heat exchanger is provided. A bathtub hot water circulation passage for circulating hot water through the reheating heat exchanger by driving the circulation pump is formed, and a water injection passage for diverting the bathtub hot water to the washing machine through the heat exchanger is formed in this bathtub hot water circulation passage. When the burner combustion is performed during the washing water injection operation in the single-can double water channel combustion device provided with the washing water injection means for injecting the bath water into the washing machine through the water injection passage, the amount of combustion heat of the burner Information on the amount of heat on the reheating side, flow rate information on hot water flowing through the reheating heat exchanger, temperature information on hot water flowing into the reheating heat exchanger, and a washing machine given in advance A washing water injection water temperature estimation detection unit that estimates and detects the temperature of water injected into the washing machine based on the estimated water temperature detection data; and the detected water injection temperature to the washing machine is lower than the preset water injection stop temperature. A one-can double-water channel combustion device with a washing water injection function, characterized in that a water injection forced stop unit that stops water injection into the washing machine when it is high is provided. 浴槽湯水追い焚き用の追い焚き熱交換器と少なくとも給湯用の熱交換器とが一体的に設けられ、それら一体化した熱交換器を共通に燃焼加熱するバーナが設けられており、また、浴槽湯水を循環ポンプの駆動により上記追い焚き熱交換器を通して循環させる浴槽湯水循環通路が形成され、この浴槽湯水循環通路には浴槽湯水を追い焚き熱交換器を通して洗濯機へ導く注水通路が分岐形成されており、該注水通路を通して洗濯機に浴槽湯水を注水する洗濯注水手段が設けられている一缶複水路燃焼機器において、洗濯注水動作中に、給湯運転の割り込みが行われているときには、バーナの燃焼熱量のうちの追い焚き側の熱量の情報と、追い焚き熱交換器を流れる湯水の流量情報と、追い焚き熱交換器に流れ込む湯水の湯温情報と、予め与えられた洗濯機注水水温の推定検出用データとに基づいて、洗濯機に注水される水温を推定検出する洗濯機注水水温推定検出部と；推定検出された洗濯機への注水水温が設定の注水停止温度よりも高いときには洗濯機への注水を停止する注水強制停止部と；が設けられていることを特徴とする洗濯注水機能付き一缶複水路燃焼機器。A reheating heat exchanger for reheating the hot water in the bathtub and at least a heat exchanger for supplying hot water are integrally provided, and a burner for commonly heating and heating the integrated heat exchanger is provided. A bathtub hot water circulation passage for circulating hot water through the reheating heat exchanger by driving the circulation pump is formed, and a water injection passage for diverting the bathtub hot water to the washing machine through the heat exchanger is formed in this bathtub hot water circulation passage. In a one-can double waterway combustion device provided with washing water injection means for injecting bath water into the washing machine through the water injection passage, when the hot water supply operation is interrupted during the washing water injection operation, Information on the amount of heat on the reheating side of the combustion heat amount, information on the flow rate of hot water flowing through the reheating heat exchanger, and information on the temperature of hot water flowing into the reheating heat exchanger are given in advance. A washing machine pouring water temperature estimation detecting unit for presuming and detecting the temperature of water poured into the washing machine based on the estimation detection data of the washing machine pouring water temperature; a pouring stop temperature set by the estimated pouring water temperature to the washing machine A one-can double waterway combustion device with a washing water injection function, characterized in that: a water injection forced stop unit that stops water injection into the washing machine when the temperature is higher than 注水強制停止部により洗濯機への注水が強制的に停止された後にも引き続き洗濯機注水水温推定検出部による水温推定検出動作を継続させ、推定検出された洗濯機への注水水温が設定の注水再開温度以下に低下したときには、洗濯機への注水を再開させる注水再開制御部が設けられていることを特徴とする請求項１又は請求項２記載の洗濯注水機能付き一缶複水路燃焼機器。Even after water injection to the washing machine is forcibly stopped by the water injection forced stop section, the water temperature estimation detection operation by the washing machine water injection temperature estimation detection section is continued, and the water injection temperature set to the estimated washing machine is set. The single-can double-water channel combustion apparatus with a washing water pouring function according to claim 1 or 2, further comprising a water pouring restart control unit that resumes water pouring into the washing machine when the temperature drops below the restarting temperature. 注水強制停止部により洗濯機への注水が強制的に停止された後に、バーナの燃焼状態が予め定めた注水再開条件を満たした状態となったときには、洗濯機への注水を再開させる注水再開制御部が設けられていることを特徴とする請求項１又は請求項２記載の洗濯注水機能付き一缶複水路燃焼機器。After the water injection to the washing machine is forcibly stopped by the water injection forced stop unit, the water injection resumption control for resuming the water injection to the washing machine when the burner combustion state satisfies a predetermined water injection resumption condition. The one-can double-channel combustion apparatus with a washing water injection function according to claim 1 or 2, wherein a portion is provided. 注水再開制御部は、洗濯機への注水停止状態を維持させたまま循環ポンプを駆動させ、浴槽湯水を浴槽湯水循環通路を通して一時的に循環させた後に、洗濯機への注水を再開させる構成としたことを特徴とする請求項３又は請求項４記載の洗濯注水機能付き一缶複水路燃焼機器。The water injection resumption control unit drives the circulation pump while maintaining the water injection stop state to the washing machine, temporarily circulates the bathtub hot water through the bathtub hot water circulation passage, and then restarts the water injection to the washing machine. The one-can double-water channel combustion apparatus with a washing and pouring function according to claim 3 or 4, wherein 水を追い焚き熱交換器を通して浴槽に流し込む給水手段が設けられており、注水再開制御部は、洗濯機への注水を再開させるときには上記給水手段によって追い焚き熱交換器に水を流し込み、追い焚き熱交換器内に滞留していた湯水を浴槽側へ排出した後に、洗濯機への注水を再開させる構成としたことを特徴とする請求項３又は請求項４記載の洗濯注水機能付き一缶複水路燃焼機器。A water supply means for supplying water to the bathtub through the heat exchanger is provided, and when the water injection restarting control unit resumes water injection to the washing machine, water is supplied to the heat exchanger by the water supply means, 5. A can having a washing water pouring function according to claim 3 or claim 4, wherein the water pouring into the washing machine is resumed after the hot water remaining in the heat exchanger is discharged to the bathtub side. Waterway combustion equipment. 追い焚き熱交換器から流れ出る湯水の温度を検出する出側湯水温度検出手段が設けられており、洗濯機注水水温推定検出部により推定検出された洗濯機への注水水温に代えて、上記出側湯水温度検出手段により実測された水温を使用することを特徴とする請求項５又は請求項６記載の洗濯注水機能付き一缶複水路燃焼機器。An outlet side hot water temperature detecting means for detecting the temperature of the hot water flowing out of the reheating heat exchanger is provided, and the above outlet side is used instead of the temperature of the water poured into the washing machine estimated and detected by the washing water injection water temperature estimation detection unit. The single-can double-channel combustion apparatus with washing water injection function according to claim 5 or 6, wherein the water temperature actually measured by the hot water temperature detecting means is used.
JP19798998A 1998-06-29 1998-06-29 One-can double waterway combustion equipment with washing water injection function Expired - Fee Related JP3872900B2 (en)

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