JP3628866B2

JP3628866B2 - Hot water supply device for bath

Info

Publication number: JP3628866B2
Application number: JP02290798A
Authority: JP
Inventors: 勝嶋崎
Original assignee: Rinnai Corp
Current assignee: Rinnai Corp
Priority date: 1998-02-04
Filing date: 1998-02-04
Publication date: 2005-03-16
Anticipated expiration: 2018-02-04
Also published as: JPH11223382A

Description

【０００１】
【発明の属する技術の分野】
本発明は、浴槽の湯を昇温させるための風呂循環回路や室内暖房機に湯を供給するための暖房循環回路の水密検査機能を備えた風呂用給湯装置に関する。
【０００２】
【従来の技術】
従来、水道から供給される水を昇温させて浴槽に給湯する風呂用給湯装置において、浴槽内の湯を風呂循環回路と風呂熱交換器とを介して循環させて昇温させる追焚き機能や、室内暖房機に暖房循環回路と暖房熱交換器とを介して昇温した湯を循環させる温水暖房機能を備えた風呂用給湯装置が知られている。
【０００３】
かかる風呂用給湯装置を新たに設置する場合、該風呂用給湯装置の設置後に給湯装置本体と浴槽とを接続する配管（前記風呂用循環回路の一部を構成する）、及び器具本体と室内暖房機とを接続する配管（前記暖房用循環回路の一部を構成する）から水漏れが生じていないこと、即ち、これらの配管の水密状態が保たれていることを確認する検査（以下、水密検査という）を行う必要がある。
【０００４】
このような水密検査の方法として、浴槽内の湯水の水位を検出するために風呂循環回路に設けられた水位センサを利用したものが提案されている。水位センサは、風呂循環回路内の静水圧から浴槽内の水位を検出するものであるため、風呂循環回路に加わっている水圧を検出することができる。
【０００５】
水位センサを用いた水密検査は、前記風呂循環回路と接続された浴槽の循環口（往路循環口と復路循環口）を超えるまで浴槽に湯水が張られて該風呂循環回路内に湯水が満たされ、且つ、該循環口が浴槽から遮蔽された状態で行われる。
【０００６】
この状態で、浴槽への湯水の供給を行うと、浴槽の循環口が遮蔽されているために、風呂循環回路内の水圧が高まる。そして、水位センサによる検出水圧が所定レベル以上に達したときに、湯水の供給を停止し、停止後の水位センサによる検出水位の低下度合を検出して、該低下度合が所定の基準度合以下であるときは水漏れが生じていると判断することで、風呂循環回路や暖房循環回路の水密性を検査することができる。
【０００７】
しかし、このように水位センサを用いた水密検査を行うときに、循環口を浴槽から遮蔽した状態で風呂循環回路に給湯すると、水道からの給水流量によっては、わずかな時間で風呂循環回路内の圧力が大きく上昇して、風呂循環回路を劣化させるおそれがあるという不都合があった。
【０００８】
また、風呂循環回路内の過剰な圧力上昇は、循環口の遮蔽部や風呂循環回路に過圧防止弁を設けることで防止できるが、水道からの給水圧力により過圧防止弁が直ちに開弁してしまう状態では、適当な水圧を風呂循環回路にかけることができないため、上記水密検査をすることができないという不都合があった。
【０００９】
かかる不都合を解消する方法として、風呂循環回路への湯水の供給を間欠的に行って、風呂循環回路内の圧力を徐々に上昇させることが考えられる。しかし、本願発明者らは、各種試験等を行った結果、このように浴槽に湯水を間欠的に供給する際に、例えば水道からの給水圧力が小さいときのように、浴槽への湯水の供給流量が少ないときには、風呂循環回路内の圧力上昇に時間がかかり、水密検査に要する時間が長くなってしまうという不都合があることを知見した。
【００１０】
【発明が解決しようとする課題】
本発明は、上記不都合を解消し、湯水の供給流量が少ない場合における風呂循環回路の水密検査に要する時間を短縮することができる風呂用給湯装置を提供することを目的とする。
【００１１】
【課題を解決するための手段】
上記目的を達成するため、本発明の第１の実施の態様は、浴槽内の湯を風呂循環回路を介して循環させて追焚きを行う風呂追焚き手段と、前記風呂循環回路と接続された湯張り回路を介して浴槽に湯水を供給する給湯手段と、前記浴槽の水位を前記風呂循環回路内の静水圧により検出する水位センサと、前記風呂循環回路に湯水が満たされ、且つ、前記風呂循環回路が接続された浴槽の往路循環口と復路循環口とが浴層から遮蔽された状態で前記給湯手段により湯水の供給を開始し、前記水位センサで検出される水圧が基準値を超えたときに湯水の供給を停止して、該停止後の前記水位センサによる検出水圧の低下度合を検出し、該低下度合が所定値以上であるときに、前記風呂循環回路から水漏れが生じていると判断する水密検査を行う水密検査手段とを備えた風呂用給湯装置の改良に関する。
【００１２】
そして、本発明の第１の実施の態様における前記水密検査手段は、前記水位センサで検出される水圧が前記基準値を超えるまで前記湯水の供給を間欠的に行い、該間欠的な湯水の供給の供給停止期間中に前記水位センサの検出水圧の上昇度合を検出し、該上昇度合が第１基準度合より小さい場合は、該間欠的な湯水の供給における供給実施期間を延長することを特徴とする。
【００１３】
かかる本発明によれば、前記水密検査手段は、前記前記給湯手段による間欠的な湯水の供給を行う際に、前記水位センサによる検出水圧の上昇度合が前記第１基準度合より小さいときは、該間欠的な湯水の供給における供給実施期間を延長する。即ち、前記給湯手段からの湯水の供給流量が少なく、湯水の供給による前記風呂循環回路内の水圧の上昇が遅いときは、前記供給実施期間が延長される。
【００１４】
そのため、前記給湯手段からの湯水の供給流量が少ない場合に、前記水位センサによる検出水位が前記基準値を超えるまでに要する時間を短縮して、前記水密検査に要する時間を短縮することができる。
【００１５】
また、本発明の第２の実施の態様は、浴槽内の湯を風呂循環回路を介して循環させて追焚きを行う風呂追焚き手段と、前記風呂循環回路と接続された湯張り回路を介して浴槽に湯水の供給を行う給湯手段と、暖房循環回路と室内暖房機とを介して昇温した湯を循環させる温水暖房手段と、前記風呂循環回路と前記暖房循環回路とを連通する連絡管と、前記浴槽の水位を前記風呂循環回路内の静水圧により検出する水位センサと、前記風呂循環回路及び前記暖房循環回路に湯水が満たされ、且つ、前記風呂循環回路が接続された浴槽の往路循環口と復路循環口とが浴槽から遮蔽された状態で前記給湯手段により湯水の供給を開始し、前記水位センサで検出される水圧が基準値を超えたときに湯水の供給を停止して、該停止後の前記水位センサによる検出水圧の低下度合を検出し、該低下度合が所定値以上であるときに、前記風呂循環回路又は前記暖房循環回路から水漏れが生じていると判断する水密検査を行う水密検査手段とを風呂用給湯装置の改良に関する。
【００１６】
そして、本発明の第２の実施の態様における前記水密検査手段は、前記水位センサで検出される水圧が前記基準値を超えるまで前記湯水の供給を間欠的に行い、該間欠的な湯水の供給の供給停止期間中に前記水位センサの検出水圧の上昇度合を検出し、該上昇度合が所定度合より小さい場合は、該間欠的な湯水の供給における供給実施期間を延長することを特徴とする。
【００１７】
かかる本発明によれば、前記第１の実施の態様と同様に、前記給湯手段による湯水の供給流量が少ない場合に、前記水密検査に要する時間を短縮することができる。
【００１８】
また、前記給湯手段からの湯水の供給流量を調節する流量制御手段を設け、前記水密検査手段は、該流量制御手段により供給流量を所定量に制限して前記給湯手段による湯水の供給を行うことを特徴とする。
【００１９】
かかる本発明によれば、前記水密検査において、前記給湯手段による湯水の供給流量が多く、湯水の供給を間欠的に行っても前記風呂循環回路及び前記暖房循環回路内の水圧が急激に上昇してしまう場合に、前記流量制御手段により前記給湯手段からの湯水の供給流量を制限することで、水圧を適切に上昇させることができる。
【００２０】
また、前記水密検査手段は、前記水密検査手段による前記間欠的な湯水の供給が開始される際の、前記水位センサによる検出水圧を記憶する記憶手段を備え、前記水密検査手段は、前記記憶手段に記憶された検出水圧と、水密状態判定時の前記水位センサによる検出水圧との差により、前記上昇度合を検出することを特徴とする。
【００２１】
かかる本発明によれば前記記憶手段に記憶された検出水圧を初期水圧とし、該初期水圧からの水圧上昇幅を前記上昇度合として算出することができる。
【００２２】
また、前記水密検査手段は、前記間欠的な湯水の供給における供給実施期間を延長した後、再度前記間欠的な湯水の供給における供給停止期間中に前記水位センサによる検出水圧の上昇度合を検出し、該上昇度合が第２基準度合よりも小さいときは、前記間欠的な湯水の供給における供給実施期間を更に延長することを特徴とする。
【００２３】
かかる本発明によれば、前記水密検査手段は、前記水密検査における前記間欠的な湯水の供給の供給実施期間を延長した後、再度前記水位センサによる検出圧力の上昇度合を検出し、検出された上昇度合が前記第２基準度合よりも小さいときは、該給湯実施期間が更に延長される。そのため、前記水密検査に要する時間を更に短縮することができる。
【００２４】
また、前記水密検査手段は、前記間欠的な湯水の供給において、前記給湯手段による湯水の供給を停止してから所定時間経過後に、前記水位センサによる検出水圧の上昇度合を検出することを特徴とする。
【００２５】
かかる本発明によれば、前記水密検査手段は、前記給湯手段による湯水の供給停止後、所定時間が経過してから、前記水位センサによる検出水圧の上昇度合を検出する。そのため、前記風呂循環回路及び前記暖房循環回路内の水圧が安定した状態で前記上昇度合の検出が行われ、該上昇度合の検出精度を向上することができる。
【００２６】
【発明の実施の形態】
本発明の実施の形態の一例を図１〜図５を参照して説明する。図１は本発明の風呂用給湯装置の全体構成図、図２〜図５は図１に示した風呂用給湯装置における水密検査の処理フローチャートである。
【００２７】
図１を参照して、本実施の形態における風呂用給湯装置の給湯装置本体１は、風呂接続管２，３により浴槽４と接続され、温風暖房機接続管５，６により温風暖房機７（本発明の室内暖房機に相当）と接続され、第１床暖房機接続管８，９により第１床暖房機１０（本発明の室内暖房機に相当）と接続され、第２床暖房機接続管１１，１２により第２床暖房機１３（本発明の室内暖房機に相当）と接続される。
【００２８】
給湯装置本体１は、コントローラ１４により全体が制御され、給湯手段１５と風呂追焚き手段１６と温水暖房手段１７とを備える。また、給湯装置本体１と接続されたリモコン１８により、使用者が給湯装置本体１に対する運転動作の指示を与える。
【００２９】
コントローラ１４は、水密検査手段１９と記憶手段２０とを含んで、ＣＰＵ、ＲＯＭ、ＲＡＭ等により構成され、リモコン１８によって指示される各種運転動作の内容に応じて、給湯手段１５、風呂追焚き手段１６、及び温水暖房手段１７の制御を行う。
【００３０】
給湯手段１５は、コントローラ１４からの制御信号により作動する給湯バーナ２１によって加熱される給湯熱交換器２２、図示しない水道管と接続されて給湯熱交換器２２に給水する給水管２３、コントローラ１４からの制御信号により給水管２３の開度を調節する水量サーボ２４（本発明の流量制御手段に相当）、給水管２３からの給水流量を検出してコントローラ１４に出力する給水流量センサ２５、給湯熱交換器２２で加熱された湯が出湯される出湯管２６、給水管２３に給水される水の一部を出湯管２６に混入させるバイパス管２７、コントローラ１４からの制御信号によりバイパス管２７の開度を調節するバイパスサーボ２８、出湯管２６とバイパス管２７との合流点の下流の給湯管２９中の湯の温度を検出してコントローラ１４に出力する給湯温度センサ３０、給湯管２９から分岐して後述する風呂循環回路７２を介して浴槽４と接続された湯張り管３１、コントローラ１４からの制御信号により湯張り管３１を開閉する湯張り電磁弁３２、湯張り管３１から浴槽への給湯流量を検出してコントローラ１４に出力する湯張り流量センサ３３、及び浴槽４内の水位を静水圧により検出する水位センサ３４を備える。
【００３１】
使用者がリモコン１８を操作して、浴槽４への湯張り指示を行うと、コントローラ１４は湯張り電磁弁３２を開弁する。この湯張り電磁弁３２の開弁により、給水管２３から給湯熱交換２２への給水が開始され、給水流量センサ２５で流水が検知される。
【００３２】
コントローラ１４は給水流量センサ２５による流水の検知に応じて、給湯バーナ２１の点火処理を行う。即ち、給湯ファン３５を作動させ、元電磁弁３６，給湯比例弁３７，給湯電磁弁３８，第１給湯切替電磁弁３９，第２給湯切替電磁弁４０を開弁して、給湯点火電極４１により火花放電を生じさせて給湯バーナ２１に点火する。
【００３３】
コントローラ１４は、給湯フレームロッド４２により給湯バーナ２１の点火を確認した後、給湯温度センサ３０で検出される浴槽４への給湯温度が、リモコン１８により設定された湯張り給湯温度となるように、給湯ファン３５の回転速度を制御して給湯バーナ２１への燃焼用空気の供給量を調節し、給湯比例弁３７，給湯電磁弁３８，第１給湯切替電磁弁３９，及び第２給湯切替電磁弁４０を制御して給湯バーナ２１への燃料ガスの供給量を調節し、給湯バイパス弁２８の開度を制御して給湯熱交換器２２への給水流量とバイパス管２７への給水流量との比率（バイパス比）を調節する。これにより、湯張り管３１を介して前記湯張り給湯温度の湯が浴槽４に供給される。
【００３４】
そして、コントローラ１４は、水位センサ３４により、浴槽４内の湯の水位がリモコン１８で設定された目標水位以上となったときに、湯張り電磁弁３２を閉弁して浴槽４への給湯を終了し、給湯バーナ２１の燃焼を停止して湯張りを終了する。
【００３５】
次に、温水暖房手段１７は、コントローラ１４からの制御信号により作動する暖房バーナ４０によって加熱される暖房熱交換器４１、コントローラ１４からの制御信号により暖房熱交換器４１で昇温された湯を暖房循環回路４２に循環させる暖房ポンプ４３、暖房熱交換器４１からの出湯温度を検出する暖房温度センサ４４、暖房循環回路４２内の水量を調節するためのシスターン４５、給水管２３からシスターン４５に給水を行う補給水管４６、及びコントローラ１４からの制御信号により開閉される補給水電磁弁４７を備える。
【００３６】
使用者がリモコン１８を操作して、室内暖房機７の作動指示を行うと、コントローラ１４は、シスターン４５に備えられた水位電極４８（低レベル側）と水位電極４９（高レベル側）とにより、暖房循環回路４２内の水量を確認し、暖房循環回路４２内の水量が不足していたときは、補給水電磁弁４７を開弁して、給水管間２３から補給水管４６を介して暖房循環回路４２内に水を補給する。
【００３７】
そして、コントローラ１４は、暖房循環回路４２内に所定量の水が満たされた状態で、暖房バーナ４０の点火処理を行う。即ち、暖房ファン５０を作動させ、暖房比例弁５１，暖房電磁弁５２，暖房切替電磁弁５３を開弁して、暖房点火電極５４により火花放電を生じさせて暖房バーナ４０に点火する。
【００３８】
コントローラ１４は、暖房フレームロッド５５により暖房バーナ４０の点火を確認した後、暖房温度センサ４４で検出される暖房循環回路４２への給湯温度が所定の暖房給湯温度となるように、暖房ファン５０の回転速度を制御して暖房バーナ４０への燃焼用空気の供給量を調節し、暖房比例弁５１，暖房電磁弁５２，及び暖房切替電磁弁５３を制御して暖房バーナ４０への燃料ガスの供給量を調節する。
【００３９】
そしてコントローラ１４は、暖房ポンプ４３を作動させる。これにより第１床暖房機接続管８，９を構成の一部とする暖房循環回路４２を介して、前記暖房給湯温度の湯が連続的に温風暖房機７に送出される。尚、暖房往路開閉弁５６と暖房復路開閉弁５７とは、後述する水密検査に使用される手動開閉弁であり、通常運転時（水密検査時以外）は開弁されている。
【００４０】
また、コントローラ１４は、使用者がリモコン１８を操作して第１床暖房機１０作動指示を行うと第１床暖熱動弁５８を開弁し、床暖房機１３の作動指示を行うと第２床暖熱動弁５９を開弁する。
【００４１】
第１床暖熱動弁５８、及び第２床暖熱動弁５９を開弁することで、暖房循環回路４２から分岐した床暖房分岐管６０が、第１床暖房機接続管８及び第２床暖房機接続管１１とそれぞれ連通されて暖房循環回路４２と連通する。これにより、室内暖房機７から戻る湯が第１床暖房機１０及び第２床暖房機１１に供給される。
【００４２】
次に、追焚き手段１６は、暖房熱交換器４１から暖房循環回路４２を介して供給される湯によって液−液熱交換動作を行う追焚き熱交換器７０、暖房熱交換器４１から追焚き熱交換器７０への給湯の開始と停止を切り替える風呂熱動弁７１、風呂接続管２，３を構成の一部とする風呂循環回路７２、浴槽４内の湯を風呂循環回路７２を介して循環させる風呂ポンプ７３、風呂循環回路７２内の湯の温度を検出する風呂温度センサ７４、及び風呂循環回路７２内の流水の有無を検出する風呂水流スイッチ７５とを備える。
【００４３】
使用者がリモコン１８を操作して、浴槽４内の湯を昇温させる追焚きの作動指示を行うと、コントローラ１４は風呂熱動弁７１を開弁する。そして、コントローラ１４は、上述した場合と同様に暖房バーナ４０に点火し、暖房バーナ４０の燃焼量を、暖房温度センサ４４で検出される暖房熱交換器４１からの出湯温度が所定の追焚き給湯温度となるように調節して、暖房ポンプ４３を作動する。これにより、追焚き熱交換器７０に、前記追焚き給湯温度の湯が連続的に送出される。
【００４４】
コントローラ１４はこの状態で、風呂ポンプ７３を作動させて浴槽４内の湯を風呂循環回路７２と追焚き熱交換器７０とを介して循環させることで、浴槽４内の湯を昇温させる。そして、コントローラ１４は、風呂温度センサ７４で検出される湯の温度がリモコン１８で設定された追焚き目標温度に到達したときに、暖房バーナ４０、風呂ポンプ７３、及び暖房ポンプ４３の作動を停止し、風呂熱動弁７１を閉弁して追焚きを終了する。
【００４５】
なお、風呂循環回路７２と暖房循環回路４２とを接続する連絡管８０と、連絡管８０を開閉する連絡管開閉弁８１とは、後述する水密検査を行うためのものであり、通常運転時（水密検査時以外）は連絡管開閉弁８が閉弁されて連絡管８０は遮断されている。
【００４６】
以上説明した本実施の形態の風呂用給湯装置を新たに設置する場合、給湯装置本体１と浴槽４とが風呂接続管２，３により確実に接続されていること、即ち水密性が保たれ、水漏れを生じていないことを確認する水密検査を実施する必要がある。同様に、給湯装置本体１と温風暖房機７との接続についての水密検査、給湯装置本体１と第１床暖房機１０との接続についての水密検査、及び給湯装置本体１と第２床暖房機１３との接続についての水密検査も実施する必要がある。尚、給湯装置本体１内の各配管の水密性については、出荷検査により保証されている。以下、図２〜図５に示したフローチャートを参照して本実施の形態における水密検査について説明する。
【００４７】
図２は、水密検査を行うための準備処理の手順を示しており、検査作業者は、先ずＳＴＥＰ１，ＳＴＥＰ２で手動式の開閉弁である暖房往路開閉弁５６と暖房復路開閉弁５７とを開弁し、ＳＴＥＰ３で手動式の開閉弁である連絡管開閉弁８１を開弁して、ＳＴＥＰ４で給湯装置本体１に設けられた図示しない試運転スイッチをＯＮ操作する。この試運転スイッチのＯＮ操作により、コントローラ１４は、給湯バーナ２１の作動を停止した状態で湯張り電磁弁３２を開弁し、浴槽４に水を供給する試運転動作を開始する。この試運転動作により、湯張り管３１と風呂循環回路７２を介して浴槽４への給水が開始される。
【００４８】
そして、検査作業者は、ＳＴＥＰ５で、風呂循環回路７２から連絡管８０へと給水されて連絡管８０内が水で満たされる（連絡管８０内の空気が水で置換される）と想定される１０秒間の経過を待って、ＳＴＥＰ６で、連絡管８０から暖房循環回路４２に給水が続行されてシスターン４５から水があふれることを防止するために連絡管開閉弁８１を閉弁する。
【００４９】
この状態で、検査作業者は、浴槽４への給水が進んで浴槽４内の水位が往路循環口８２及び復路循環口８３以上となり（ＳＴＥＰ７）、往路循環口８２及び復路循環口８３からエアーがでていない（ＳＴＥＰ８）状態となるのを待つ。即ち、風呂循環回路７２内に水が満たされるまで待つ。
【００５０】
そして、検査作業者はＳＴＥＰ９で、試運転スイッチのＯＦＦ操作により試運転動作を終了して浴槽４への給水を停止し、ＳＴＥＰ１０で往路循環口８２と復路循環口８３とを覆って浴槽８４から遮蔽する風呂アダプター８４を装着する。この風呂アダプター８４の装着により、風呂循環回路７２は閉回路となる。
【００５１】
次に検査作業者は、ＳＴＥＰ１１で給湯装置本体１に設けられた図示しない暖房水張りスイッチをＯＮ操作する。この暖房水張りスイッチのＯＮ操作により、コントローラ１４は、補給水電磁弁４７を開弁して給水管２３から補給水管４６を介して暖房循環回路４２に給水を開始すると共に、第１床暖熱動弁５８と第２床暖熱動弁５９を開弁する。
【００５２】
そして、コントローラ１４は、シスターン４５に設けられた低水位電極４８と高水位電極４９からの出力信号によって暖房循環回路４２内の給水量を検出し、給水量が所定量に達したときに補給水電磁弁４７，第１床暖熱動弁５８，及び第２床暖熱動弁５９を閉弁して暖房循環回路４２への給水を終了する。これにより暖房循環回路４２と、暖房循環回路４２と連通した温風暖房機接続管５，６，温風暖房機７，第１床暖房機接続管８，９，第１床暖房機１０，第２床暖房機接続管１１，１２，及び第２床暖房機１３内に水が満ちた状態となる。
【００５３】
そして、この状態で検査作業者はＳＴＥＰ１３で再び連絡管開閉弁８１を開弁して、連絡管８０を介して風呂循環回路７２と暖房循環回路４２とを連通させ、ＳＴＥＰ１４，ＳＴＥＰ１５で、暖房往路開閉弁５６と暖房復路開閉弁５７とを閉弁する。このＳＴＥＰ１４，ＳＴＥＰ１５の閉弁処理は、後述する水密検査において風呂循環回路７２側から圧力を加えたときに、圧力がシスターン４５から逃げないようにするための処理である。
【００５４】
以上説明した図２，３のＳＴＥＰ１〜ＳＴＥＰ１５の処理により水密検査を行うための準備が完了する。そして、この状態で、検査作業者はコントローラ１４に備えられた水密検査手段１９を作動させて水密検査を行う。
【００５５】
水密検査手段１９は、上述した準備処理が完了した状態で、先ず風呂循環回路７２に給水して風呂循環回路７２と、風呂循環回路７２と連絡管８０により接続された暖房循環回路４２の、暖房往路開閉弁５６，暖房復路開閉弁５７，第１床暖熱動弁５８，及び第２床暖熱動弁５９により閉鎖された部分（以下、暖房閉鎖循環回路という）との内部の水圧を所定の基準値まで上昇させて給水を停止する（以下、水圧上昇処理という）。
【００５６】
そして、次に、水密検査手段１９は、給水停止後の水位センサ３４による検出水圧の低下度合を検出し、検出した低下度合を所定の基準低下度合と比較することで、給湯装置本体１と、浴槽４，温風暖房機７，第１床暖房機１０及び第２床暖房機１３との接続管路の水密状態の良否を判定する（以下、低下度合判定処理という）。
【００５７】
図４，図５を参照して、ＳＴＥＰ４〜ＳＴＥＰ１７が前記水圧上昇処理を行う部分であり、ＳＴＥＰ４から分岐するＳＴＥＰ２０〜ＳＴＥＰ２６が前記低下度合判定処理を行う部分である。
【００５８】
図４を参照して、ＳＴＥＰ１で検査作業者が給湯装置本体１に備えられた図示しない水密検査スイッチをＯＮすると、水密検査手段１９は先ず前記水圧上昇処理を開始し、ＳＴＥＰ２で、給湯熱交換器２２から風呂循環回路７２への給水流量を制限するために水量サーボ２４を最小開度とする。このように風呂循環回路７２への給水流量を制限することで、微小量ずつ風呂循環回路７２に給水し、風呂循環回路７２内の水圧を徐々に上昇させることができる。
【００５９】
そして、水密検査手段１９は、ＳＴＥＰ３で水密検査開始時の水位センサ３４による検出水圧を初期水圧Ｐ_０として記憶手段２０に保持し、ＳＴＥＰ４で、水位センサ３４の検出水圧Ｐが基準値（１．５ｋｇｆ／ｃｍ^２）以上であったときは、ＳＴＥＰ２０に分岐して水圧上昇処理から前記低下度合判定処理に移行する。
【００６０】
一方、ＳＴＥＰ４で、水位センサの検出水圧Ｐが基準値（１．５ｋｇｆ／ｃｍ^２）未満であったときには、ＳＴＥＰ５に進んで湯張り電磁弁３２を０．０５秒間開弁して閉弁し、閉弁後１０秒経過時に、ＳＴＥＰ６で水位センサ３４の検出水圧Ｐが基準値（１．５ｋｇｆ／ｃｍ^２）以上まで上昇したか否かを判断する。
【００６１】
ＳＴＥＰ６で、検出水圧Ｐが基準値（１．５ｋｇｆ／ｃｍ^２）以上であったときは、ＳＴＥＰ２０に分岐して前記低下度合判定処理に移行し、基準値（１．５ｋｇｆ／ｃｍ^２）未満であったときには、ＳＴＥＰ７に進む。そして、ＳＴＥＰ７でＳＴＥＰ５と同様に、湯張り電磁弁３２を０．０５秒間開弁して閉弁し、ＳＴＥＰ８で水位センサ３４の検出水圧Ｐが基準値（１．５ｋｇｆ／ｃｍ^２）以上であったときはＳＴＥＰ２０に分岐する。
【００６２】
そして、水密検査手段１９は、ＳＴＥＰ９で記憶手段２０に保持した初期水圧Ｐ_０と現時点の検出水圧Ｐとの差から、検出水圧Ｐの上昇度合（上昇幅）を算出し、該上昇度合が０．５ｋｇｆ／ｃｍ^２（本発明の第１基準度合に相当）以上であったときは、ＳＴＥＰ４０を経由してＳＴＥＰ７〜ＳＴＥＰ９のループを繰り返し実行する。これにより湯張り電磁弁３２が開弁時間０．０５秒（本発明の供給実施期間に相当）、閉弁時間１０秒（本発明の供給停止期間に相当）で開閉され、風呂循環回路７２に、間欠的に給水が行われる。
【００６３】
ＳＴＥＰ７〜ＳＴＥＰ９の間欠的な給湯動作により、ＳＴＥＰ８で水位センサ３４による検出水圧Ｐが基準値（１．５ｋｇｆ／ｃｍ^２）以上となったときは、ＳＴＥＰ２０に分岐して前記低下度合判定処理に移行する。また、ＳＴＥＰ７〜ＳＴＥＰ９のループを２６回実行しても、水位センサ３４の検出水圧Ｐが基準値（１．５ｋｇｆ／ｃｍ^２）以上とならなかったときには、ＳＴＥＰ４０からＳＴＥＰ４１に分岐し、水密検査手段１９は給湯装置本体１に備えられた図示しない報知手段により、検査不可であることを検査作業者に報知する。
【００６４】
一方、ＳＴＥＰ９で、水位センサ３４の検出水圧の上昇度合が０．５ｋｇｆ／ｃｍ^２未満であったときには、図５のＳＴＥＰ１０に進んで湯張り電磁弁３２の開弁時間（本発明の供給実施時間に相当）を０．０５秒から１秒に延長する。そして、湯張り電磁弁３２の閉弁後１０秒経過したＳＴＥＰ１１で、水位センサ３４の検出水位が基準値（１．５ｋｇｆ／ｃｍ^２）以上であったときは、ＳＴＥＰ２０に分岐して前記低下度合判定処理に移行する。
【００６５】
ＳＴＥＰ１１で、水位センサ３４の検出水圧Ｐが基準値（１．５ｋｇｆ／ｃｍ^２）未満であったときには、ＳＴＥＰ１２〜ＳＴＥＰ１４のループが実行される。ＳＴＥＰ１２〜ＳＴＥＰ１４のループは、湯張り電磁弁３２の開弁時間を０．０５秒から１．０秒に延長して、上述したＳＴＥＰ７〜ＳＴＥＰ９のループと同様の間欠的な給水動作を行う。
【００６６】
水密検査手段１９は、このように湯張り電磁弁３２の開弁時間（本発明の供給実施期間に相当）を延長することで、一回の間欠的な給水における風呂循環回路７２への給水量を増加させ、風呂循環回路７２内の水圧上昇度合の増大を図っている。これにより、前記水圧上昇処理に要する時間を短縮することができる。
【００６７】
そして、水密検査手段１９は、ＳＴＥＰ１４で初期水圧Ｐ_０に対する検出水圧Ｐの上昇度合が、０．７ｋｇｆ／ｃｍ^２（本発明の第２基準度合に相当）未満であったときは、ＳＴＥＰ１５に進んで、湯張り電磁弁３２の開弁時間（本発明の供給実施期間に相当）を更に０．３秒に延長して、ＳＴＥＰ１５〜ＳＴＥＰ１７のループを実行し、風呂循環回路７２に間欠的に給水を行う。これにより、前記水圧上昇処理に要する時間を更に短縮することができる。
【００６８】
ＳＴＥＰ１５〜ＳＴＥＰ１７の処理を２６回実行しても、水位センサ３４の検出水圧が基準値（１．５ｋｇｆ／ｃｍ^２）以上とならなかったときは、ＳＴＥＰ１７からＳＴＥＰ１８に進んで、水密検査手段１９は給湯装置本体１に備えられた図示しない報知手段により、検査不可であることを検査作業者に報知する。
【００６９】
水密検査手段１９は、ＳＴＥＰ１〜ＳＴＥＰ１７の処理により、水位センサ３４による検出水圧が基準値（１．５ｋｇｆ／ｃｍ^２）以上となったときには、ＳＴＥＰ２０に分岐して、前記低下度合判定処理を開始する。
【００７０】
水密状態検査手段１９は、ＳＴＥＰ２０で水位センサ３４の検出水圧Ｐが２．７ｋｇｆ／ｃｍ^２）以上であったときは、風呂循環回路７２の水圧が高すぎて正常な水密検査ができないために、ＳＴＥＰ３０に分岐して水密検査手段１９は給湯装置本体１に備えられた図示しない報知手段により、検査不可であることを検査作業者に報知する。
【００７１】
ＳＴＥＰ２０で水位センサ３４の検出水圧Ｐが２．７ｋｇｆ／ｃｍ^２未満であったときはＳＴＥＰ２１に進み、現時点（低下度合判定処理の開始時点）の水位センサ３４の検出水圧を開始水圧Ｐ_Ｓとして記憶手段２０に保持し、ＳＴＥＰ２２で５分タイマを起動する。
【００７２】
そして、水密状態検査手段１９は、ＳＴＥＰ２４で５分タイマがタイムアップする前に、ＳＴＥＰ２３で、水位センサ３４による検出水圧Ｐの前記開始水圧Ｐ_Ｓからの低下度合（Ｐ−Ｐ_Ｓ）が０．５ｋｇｆ／ｃｍ^２（本発明の所定値に相当）以上となったときは、風呂循環回路７２又は前記暖房閉鎖循環回路の水密性が不十分であると判断してＳＴＥＰ３１に分岐し、給湯装置本体１に備えられた図示しない報知手段により、水密性が不良であることを検査作業者に報知する。
【００７３】
尚、このとき、風呂循環回路７２の水密性が不十分であるのか、暖房閉鎖循環回路の水密性が不十分であるのかが特定できない場合には、風呂循環回路７２と暖房閉鎖循環回路とをつなぐ連絡管８０に設けられた連絡管開閉弁８１を閉弁し、風呂循環回路７２のみの水密検査を再度行うようにすればよい。
【００７４】
そして、この水密検査の結果、水密性が十分であれば暖房閉鎖循環回路の不良と判断できる。一方、水密性が不十分であったときは風呂循環回路７２の水密性のみが不十分であるのか、風呂循環回路７２の水密性と暖房閉鎖循環回路の水密性が共に不十分であるのかの判断ができない。
【００７５】
そこで、この場合には、少なくとも風呂循環回路７２の水密性が不十分であるので、先ず風呂循環回路７２を修理して再度風呂循環回路７２のみについて水密検査を行えば、暖房閉鎖循環回路の気密性が十分であるか否かを判断することができる。
【００７６】
一方、ＳＴＥＰ２４で５分タイマがタイムアップしたときには、水密性は良好であると判断できるが、水密検査の慎重を期すために、水密検査手段１９はＳＴＥＰ２５からＳＴＥＰ３に分岐して再度水密検査を実行する。そして、２回目の水密検査においてＳＴＥＰ２４で５分タイマがタイムアップしたときには、ＳＴＥＰ２５からＳＴＥＰ２６に進み、風呂循環回路７２及び前記暖房閉鎖循環回路の水密性は十分であると判断して、給湯装置本体１に備えられた図示しない報知手段により、水密性が良好であることを検査作業者に報知する。
【００７７】
検査作業者は、前記水密性が良好であることの報知を確認したときは、給湯装置本体１と、浴槽４、温風暖房機７、第１床暖房機、及び第２床暖房機との接続が水密性を保って正常になされていると判断して水密検査を終了する。
【００７８】
尚、本実施の形態では、図４，図５に示したフローチャートにおいて、湯張り電磁弁３２の閉弁後、１０秒経過した時点で水位センサ３４により浴槽循環回路７２内の水圧を検出して前記基準値（１．５ｋｇｆ／ｃｍ^２）と比較したが、これを湯張り電磁弁３２の閉弁後、例えば５秒経過した時点から複数回水圧を検出し、検出した水圧の平均値を前記基準値（１．５ｋｇｆ／ｃｍ^２）と比較するようにしてもよい。
【００７９】
また、本実施の形態では、水密検査開始時の水位センサ３４による検出水圧を初期水圧Ｐ_０としたが（図４のＳＴＥＰ３）、風呂循環管路７２や暖房循環回路４２の設置状態や外気温等の影響により、初期水圧Ｐ_０が安定しない場合がある。この場合には、図４のＳＴＥＰ５で示した間欠的な給湯を１回、或いは数回行う予備過圧処理を行った後に、水位センサ３４で検出される水圧を初期水圧Ｐ_０とすることで、初期水圧Ｐ_０を安定させるようにしてもよい。
【００８０】
また、本実施の形態では室内暖房機として温風暖房機及び床暖房機が接続された風呂用給湯装置を示したが、他の室内暖房機、例えばパネルヒータ等を接続した風呂用給湯装置であってもよい。
【００８１】
また、本実施の形態では、ガスバーナにより加熱される熱交換器を使用して給湯を行う風呂用給湯装置を示したが、電気ヒータや灯油バーナ等他の種類の加熱手段を使用して給湯を行う風呂用給湯装置であってもよい。
【図面の簡単な説明】
【図１】本発明の風呂用給湯装置の全体構成図。
【図２】図１に示した風呂用給湯装置における水密検査の処理フローチャート。
【図３】図１に示した風呂用給湯装置における水密検査の処理フローチャート。
【図４】図１に示した風呂用給湯装置における水密検査の処理フローチャート。
【図５】図１に示した風呂用給湯装置における水密検査の処理フローチャート。
【符号の説明】
１…給湯装置本体、２，３…風呂接続管、４…浴槽、５，６…温風暖房機接続管、７…温風暖房機、８，９…第１床暖房機接続管、１０…第１床暖房機、１１，１２…第２床暖房機接続管、１３…第２床暖房機、１４…コントローラ、１５…給湯手段、１６…風呂追焚き手段、１７…温水暖房手段、１８…リモコン、１９…水密検査手段、２０…記憶手段、２１…給湯バーナ、２２…給湯熱交換器、２３…給水管、２４…水量サーボ、２５…給水流量センサ、２６…出湯管、２７…バイパス管、２８…バイパスサーボ、２９…給湯管、３０…給湯温度センサ、３１…湯張り管、３２…湯張り電磁弁、３３…湯張り流量センサ、３４…水位センサ、３５…給湯ファン、３６…元電磁弁、３７…給湯比例弁、３８…給湯電磁弁、３９…第１給湯切替電磁弁、４０…第２給湯切替電磁弁、４１…給湯点火電極、４２…暖房循環回路、４３…暖房ポンプ、４４…暖房温度センサ、４５…シスターン、４６…補給水管、４７…補給水電磁弁、４８，４９…水位電極、５０…暖房ファン、５１…暖房比例弁、５２…暖房電磁弁、５３…暖房切替電磁弁、５４…暖房点火電極、５５…暖房フレームロッド、５６…暖房往路開閉弁、５７…暖房復路開閉弁、５８…第１床暖熱動弁、５９…第２床暖熱動弁、６０…床暖房分岐管、７０…追焚き熱交換器、７１…風呂熱動弁、７２…風呂循環回路、７３…風呂循環ポンプ、７４…風呂温度センサ、７５…風呂水流スイッチ、８０…連絡管、８１…連絡管開閉弁[0001]
[Field of the Invention]
The present invention relates to a hot water supply apparatus for a bath provided with a water circulation inspection function of a bath circulation circuit for raising the temperature of hot water in a bathtub and a heating circulation circuit for supplying hot water to an indoor heater.
[0002]
[Prior art]
Conventionally, in a hot water supply apparatus for a bath that raises the temperature of water supplied from a water supply and supplies it to a bathtub, a reheating function that circulates the hot water in the bathtub through a bath circulation circuit and a bath heat exchanger and raises the temperature. There is known a hot water supply apparatus for a bath having a hot water heating function for circulating hot water heated through a heating circulation circuit and a heating heat exchanger in an indoor heater.
[0003]
When such a bath water heater is newly installed, a pipe (which constitutes part of the bath circulation circuit) for connecting the water heater main body and the bathtub after the bath water heater is installed, and the appliance main body and the room heating Inspection for confirming that water leakage has not occurred from the pipes connecting to the machine (which constitutes a part of the heating circulation circuit), that is, the watertight state of these pipes is maintained (hereinafter, watertight Inspection).
[0004]
As such a water-tightness inspection method, a method using a water level sensor provided in a bath circulation circuit in order to detect the water level of hot water in a bathtub has been proposed. Since the water level sensor detects the water level in the bathtub from the hydrostatic pressure in the bath circulation circuit, the water pressure applied to the bath circulation circuit can be detected.
[0005]
In the water-tightness inspection using the water level sensor, the bath is filled with hot water until it exceeds the circulation port (outbound circulation port and return circulation port) of the bathtub connected to the bath circulation circuit, and the bath circulation circuit is filled with hot water. And it is performed in a state where the circulation port is shielded from the bathtub.
[0006]
When hot water is supplied to the bathtub in this state, the water pressure in the bath circulation circuit increases because the circulation port of the bathtub is shielded. Then, when the detected water pressure by the water level sensor reaches a predetermined level or more, the supply of hot water is stopped, the degree of decrease in the detected water level by the water level sensor after the stop is detected, and the degree of decrease is below a predetermined reference degree. In some cases, it is possible to inspect the water tightness of the bath circulation circuit and the heating circulation circuit by judging that water leakage has occurred.
[0007]
However, when performing water-tightness inspection using a water level sensor in this way, if hot water is supplied to the bath circulation circuit with the circulation port shielded from the bathtub, depending on the water supply flow rate from the tap, There was a disadvantage that the pressure was greatly increased and the bath circulation circuit might be deteriorated.
[0008]
In addition, an excessive pressure rise in the bath circulation circuit can be prevented by providing an overpressure prevention valve in the shielding part of the circulation port and the bath circulation circuit, but the overpressure prevention valve opens immediately due to the supply water pressure from the water supply. In such a state, it is not possible to apply an appropriate water pressure to the bath circulation circuit, so that the watertight inspection cannot be performed.
[0009]
As a method for eliminating such inconvenience, it is conceivable to intermittently increase the pressure in the bath circulation circuit by intermittently supplying hot water to the bath circulation circuit. However, as a result of various tests and the like, the inventors of the present application have supplied hot water to the bathtub when the hot water is intermittently supplied to the bathtub, for example, when the water supply pressure from the water supply is small. It has been found that when the flow rate is small, it takes time to increase the pressure in the bath circulation circuit, and the time required for the watertight inspection becomes long.
[0010]
[Problems to be solved by the invention]
An object of the present invention is to provide a hot water supply apparatus for a bath that can eliminate the above-described disadvantages and can reduce the time required for watertight inspection of a bath circulation circuit when the supply flow rate of hot water is small.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the first embodiment of the present invention is connected to a bath replenishing means for recirculating hot water in a bathtub through a bath circulation circuit and the bath circulation circuit. Hot water supply means for supplying hot water to the bathtub through the hot water filling circuit, a water level sensor for detecting the water level of the bathtub by the hydrostatic pressure in the bath circulation circuit, the bath circulation circuit is filled with hot water, and the bath Supply of hot water was started by the hot water supply means in a state where the forward circulation port and the return circulation port of the bathtub connected to the circulation circuit were shielded from the bath layer, and the water pressure detected by the water level sensor exceeded the reference value Sometimes the supply of hot water is stopped, the degree of decrease in the water pressure detected by the water level sensor after the stop is detected, and when the degree of decrease is greater than or equal to a predetermined value, water leaks from the bath circulation circuit Water for watertightness inspection An improvement of the bath hot water supply device provided with an inspection means.
[0012]
And the said water-tightness inspection means in the 1st embodiment of this invention performs supply of the said hot water intermittently until the water pressure detected by the said water level sensor exceeds the said reference value, and supply of this intermittent hot water The degree of increase in the detected water pressure of the water level sensor is detected during the supply stop period, and when the increase degree is smaller than the first reference degree, the supply execution period in the intermittent hot water supply is extended. To do.
[0013]
According to the present invention, the water tightness inspection means, when intermittently supplying hot water by the hot water supply means, when the degree of increase in the detected water pressure by the water level sensor is smaller than the first reference degree, Extend the supply period for intermittent hot water supply. That is, when the supply flow rate of hot water from the hot water supply means is small and the increase in water pressure in the bath circulation circuit due to the supply of hot water is slow, the supply execution period is extended.
[0014]
Therefore, when the supply flow rate of hot water from the hot water supply means is small, the time required for the water level detected by the water level sensor to exceed the reference value can be shortened, and the time required for the water tightness test can be shortened.
[0015]
In addition, the second embodiment of the present invention provides a bath replenishing means for recirculating hot water in a bathtub through a bath circulation circuit, and a hot water filling circuit connected to the bath circulation circuit. Hot water supply means for supplying hot water to the bathtub, hot water heating means for circulating hot water heated via the heating circulation circuit and the indoor heater, and a communication pipe communicating the bath circulation circuit and the heating circulation circuit And a water level sensor for detecting the water level of the bathtub by the hydrostatic pressure in the bath circulation circuit, and the outward path of the bathtub in which the bath circulation circuit and the heating circulation circuit are filled with hot water and to which the bath circulation circuit is connected Start supplying hot water by the hot water supply means in a state where the circulation port and the return circulation port are shielded from the bathtub, and stop supplying hot water when the water pressure detected by the water level sensor exceeds a reference value, To the water level sensor after the stop A water-tightness inspection means for performing a water-tightness inspection for determining that water leakage has occurred from the bath circulation circuit or the heating circulation circuit when the degree of decrease in the detected water pressure is greater than or equal to a predetermined value. The present invention relates to an improvement of a hot water supply device for a bath.
[0016]
And the said water-tightness inspection means in the 2nd embodiment of this invention performs supply of the said hot water intermittently until the water pressure detected by the said water level sensor exceeds the said reference value, and supply of this intermittent hot water During the supply stop period, the degree of increase in the water pressure detected by the water level sensor is detected, and when the increase degree is smaller than the predetermined degree, the supply execution period in the intermittent hot water supply is extended.
[0017]
According to the present invention, as in the first embodiment, when the hot water supply flow rate by the hot water supply means is small, the time required for the watertight inspection can be shortened.
[0018]
Further, a flow rate control means for adjusting the supply flow rate of hot water from the hot water supply means is provided, and the water tightness inspection means limits the supply flow rate to a predetermined amount by the flow rate control means and supplies hot water by the hot water supply means. It is characterized by.
[0019]
According to the present invention, in the water tightness inspection, the hot water supply flow rate by the hot water supply means is large, and even if hot water is supplied intermittently, the water pressure in the bath circulation circuit and the heating circulation circuit rapidly increases. In such a case, the water pressure can be appropriately increased by limiting the flow rate of hot water supplied from the hot water supply means by the flow rate control means.
[0020]
Further, the water tightness inspection means includes storage means for storing a water pressure detected by the water level sensor when the intermittent water supply by the water tightness check means is started, and the water tightness check means is the storage means. The degree of increase is detected based on the difference between the detected water pressure stored in the water pressure and the detected water pressure by the water level sensor when determining the watertight state.
[0021]
According to the present invention, the detected water pressure stored in the storage means can be used as the initial water pressure, and the water pressure increase width from the initial water pressure can be calculated as the increase degree.
[0022]
Further, the water tightness inspection means detects the degree of increase in the detected water pressure by the water level sensor again during the supply stop period in the intermittent hot water supply after extending the supply execution period in the intermittent hot water supply. When the increase degree is smaller than the second reference degree, the supply execution period in the intermittent hot water supply is further extended.
[0023]
According to the present invention, the water tightness inspection means detects and detects the degree of increase in the detection pressure by the water level sensor again after extending the supply implementation period of the intermittent hot water supply in the water tightness check. When the degree of increase is smaller than the second reference degree, the hot water supply period is further extended. Therefore, the time required for the watertight inspection can be further shortened.
[0024]
Further, the water tightness inspection means detects the degree of increase in the water pressure detected by the water level sensor after a predetermined time has elapsed since the supply of hot water by the hot water supply means was stopped in the intermittent hot water supply. To do.
[0025]
According to the present invention, the water tightness inspection means detects the degree of increase in the water pressure detected by the water level sensor after a predetermined time has elapsed after the hot water supply means stops supplying hot water. Therefore, the degree of increase is detected in a state where the water pressure in the bath circulation circuit and the heating circulation circuit is stable, and the detection accuracy of the degree of increase can be improved.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
An example of an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall configuration diagram of a hot water supply apparatus for a bath according to the present invention, and FIGS.
[0027]
Referring to FIG. 1, hot water supply body 1 of a hot water supply apparatus for a bath in the present embodiment is connected to bathtub 4 by bath connection pipes 2 and 3, and hot air heaters by hot air heater connection pipes 5 and 6. 7 (corresponding to the indoor heater of the present invention), connected to the first floor heater 10 (corresponding to the indoor heater of the present invention) by the first floor heater connecting pipes 8 and 9, and the second floor heating. The machine connecting pipes 11 and 12 are connected to the second floor heater 13 (corresponding to the indoor heater of the present invention).
[0028]
The hot water supply apparatus body 1 is entirely controlled by a controller 14 and includes a hot water supply means 15, a bath reheating means 16, and a hot water heating means 17. In addition, a user gives an instruction for a driving operation to the hot water supply apparatus body 1 by a remote controller 18 connected to the hot water supply apparatus body 1.
[0029]
The controller 14 includes a water-tightness inspection means 19 and a storage means 20 and is composed of a CPU, ROM, RAM, and the like. Depending on the contents of various operation operations instructed by the remote controller 18, the hot water supply means 15, bath renewal means 16 and hot water heating means 17 are controlled.
[0030]
The hot water supply means 15 includes a hot water supply heat exchanger 22 that is heated by a hot water supply burner 21 that is operated by a control signal from the controller 14, a water supply pipe 23 that is connected to a water pipe (not shown) and supplies water to the hot water supply heat exchanger 22, and the controller 14. A water amount servo 24 (corresponding to the flow rate control means of the present invention) for adjusting the opening of the water supply pipe 23 according to the control signal, a water supply flow rate sensor 25 for detecting the water supply flow rate from the water supply pipe 23 and outputting it to the controller 14, A hot water pipe 26 from which hot water heated by the exchanger 22 is discharged, a bypass pipe 27 that mixes a part of the water supplied to the water supply pipe 23 into the hot water pipe 26, and the opening of the bypass pipe 27 by a control signal from the controller 14. The controller 14 detects the temperature of hot water in the hot water supply pipe 29 downstream of the junction of the hot water pipe 26 and the bypass pipe 27 with the bypass servo 28 that adjusts the degree. A hot water supply temperature sensor 30 to be output, a hot water supply pipe 31 branched from the hot water supply pipe 29 and connected to the bathtub 4 via a bath circulation circuit 72 to be described later, and a hot water supply pipe that opens and closes the hot water supply pipe 31 by a control signal from the controller 14. A solenoid valve 32, a hot water flow rate sensor 33 that detects the hot water flow rate from the hot water filling pipe 31 to the bathtub and outputs it to the controller 14, and a water level sensor 34 that detects the water level in the bathtub 4 by hydrostatic pressure.
[0031]
When the user operates the remote controller 18 to give a hot water filling instruction to the bathtub 4, the controller 14 opens the hot water electromagnetic valve 32. By opening the hot water solenoid valve 32, water supply from the water supply pipe 23 to the hot water supply heat exchange 22 is started, and flowing water is detected by the water supply flow rate sensor 25.
[0032]
The controller 14 performs ignition processing of the hot water supply burner 21 in response to detection of running water by the feed water flow sensor 25. That is, the hot water supply fan 35 is operated to open the original solenoid valve 36, the hot water proportional valve 37, the hot water solenoid valve 38, the first hot water switch solenoid valve 39, and the second hot water switch solenoid valve 40, and the hot water spark ignition electrode 41. Spark discharge is generated and the hot water supply burner 21 is ignited.
[0033]
After the controller 14 confirms the ignition of the hot water supply burner 21 by the hot water supply frame rod 42, the hot water supply temperature to the bathtub 4 detected by the hot water supply temperature sensor 30 becomes the hot water supply hot water temperature set by the remote controller 18. The rotational speed of the hot water supply fan 35 is controlled to adjust the amount of combustion air supplied to the hot water burner 21, and the hot water proportional valve 37, the hot water solenoid valve 38, the first hot water switch solenoid valve 39, and the second hot water switch solenoid valve. 40 is controlled to adjust the supply amount of the fuel gas to the hot water supply burner 21, and the opening degree of the hot water supply bypass valve 28 is controlled to control the ratio of the water supply flow rate to the hot water supply heat exchanger 22 and the water supply flow rate to the bypass pipe 27. Adjust (bypass ratio). As a result, hot water at the hot water supply temperature is supplied to the bathtub 4 through the hot water pipe 31.
[0034]
Then, the controller 14 closes the hot water solenoid valve 32 to supply hot water to the bathtub 4 when the water level of the hot water in the bathtub 4 becomes equal to or higher than the target water level set by the remote controller 18 by the water level sensor 34. The combustion of the hot water supply burner 21 is stopped and the hot water filling is finished.
[0035]
Next, the hot water heater 17 heats the hot water heated by the heating heat exchanger 41 heated by the heating burner 40 operated by the control signal from the controller 14 and the heating heat exchanger 41 by the control signal from the controller 14. A heating pump 43 circulated in the heating circulation circuit 42, a heating temperature sensor 44 for detecting the temperature of the hot water from the heating heat exchanger 41, a cis turn 45 for adjusting the amount of water in the heating circulation circuit 42, and the supply pipe 23 to the cis turn 45 A replenishing water pipe 46 that supplies water and a replenishing water electromagnetic valve 47 that is opened and closed by a control signal from the controller 14 are provided.
[0036]
When the user operates the remote controller 18 to instruct the operation of the indoor heater 7, the controller 14 uses the water level electrode 48 (low level side) and the water level electrode 49 (high level side) provided in the cistern 45. Then, the amount of water in the heating circuit 42 is confirmed, and when the amount of water in the heating circuit 42 is insufficient, the make-up water electromagnetic valve 47 is opened to heat the water supply pipe 23 through the make-up water pipe 46. Water is supplied into the circulation circuit 42.
[0037]
Then, the controller 14 performs an ignition process of the heating burner 40 in a state where a predetermined amount of water is filled in the heating circulation circuit 42. That is, the heating fan 50 is operated, the heating proportional valve 51, the heating electromagnetic valve 52, and the heating switching electromagnetic valve 53 are opened, and a spark discharge is generated by the heating ignition electrode 54 to ignite the heating burner 40.
[0038]
After confirming ignition of the heating burner 40 by the heating frame rod 55, the controller 14 adjusts the heating fan 50 so that the hot water supply temperature to the heating circulation circuit 42 detected by the heating temperature sensor 44 becomes a predetermined heating hot water supply temperature. The rotation speed is controlled to adjust the amount of combustion air supplied to the heating burner 40, and the heating proportional valve 51, the heating electromagnetic valve 52, and the heating switching electromagnetic valve 53 are controlled to supply the fuel gas to the heating burner 40. Adjust the amount.
[0039]
Then, the controller 14 operates the heating pump 43. Thereby, the hot water of the heating hot water supply temperature is continuously sent to the hot air heater 7 through the heating circulation circuit 42 having the first floor heater connecting pipes 8 and 9 as a part of the configuration. The heating forward / reverse opening / closing valve 56 and the heating return passage opening / closing valve 57 are manual opening / closing valves used for a watertight inspection described later, and are opened during normal operation (except during the watertight inspection).
[0040]
The controller 14 opens the first floor warming valve 58 when the user operates the remote controller 18 to give an operation instruction for the first floor heater 10 and issues an operation instruction for the floor heater 13. The two-bed warming valve 59 is opened.
[0041]
By opening the first floor warming valve 58 and the second floor warming valve 59, the floor heating branch pipe 60 branched from the heating circuit 42 is connected to the first floor heater connecting pipe 8 and the second floor heating pipe 58. It communicates with the floor heater connecting pipe 11 and communicates with the heating circuit 42. Thereby, hot water returning from the indoor heater 7 is supplied to the first floor heater 10 and the second floor heater 11.
[0042]
Next, the reheating means 16 retreats from the reheating heat exchanger 70 and the heating heat exchanger 41 that perform a liquid-liquid heat exchange operation with hot water supplied from the heating heat exchanger 41 via the heating circulation circuit 42. A bath heat valve 71 for switching start and stop of hot water supply to the heat exchanger 70, a bath circulation circuit 72 having the bath connection pipes 2 and 3 as a part of the structure, and hot water in the bathtub 4 via the bath circulation circuit 72 A bath pump 73 for circulation, a bath temperature sensor 74 for detecting the temperature of hot water in the bath circulation circuit 72, and a bath water flow switch 75 for detecting the presence or absence of running water in the bath circulation circuit 72 are provided.
[0043]
When the user operates the remote controller 18 to give a reheating operation instruction to raise the temperature of the hot water in the bathtub 4, the controller 14 opens the bath heat valve 71. Then, the controller 14 ignites the heating burner 40 in the same manner as described above, and the amount of combustion in the heating burner 40 is determined by the heating temperature from the heating heat exchanger 41 detected by the heating temperature sensor 44. The heating pump 43 is activated by adjusting the temperature. As a result, the hot water at the additional hot water supply temperature is continuously sent to the additional heat exchanger 70.
[0044]
In this state, the controller 14 operates the bath pump 73 to circulate the hot water in the bathtub 4 through the bath circulation circuit 72 and the reheating heat exchanger 70, thereby raising the temperature of the hot water in the bathtub 4. Then, the controller 14 stops the operation of the heating burner 40, the bath pump 73, and the heating pump 43 when the temperature of the hot water detected by the bath temperature sensor 74 reaches the reheating target temperature set by the remote controller 18. Then, the bath heat valve 71 is closed to end the chasing.
[0045]
Note that a connecting pipe 80 that connects the bath circulation circuit 72 and the heating circulation circuit 42 and a connecting pipe on-off valve 81 that opens and closes the connecting pipe 80 are for performing a water-tightness inspection, which will be described later, during normal operation ( The communication pipe on / off valve 8 is closed and the communication pipe 80 is shut off except during the watertight inspection.
[0046]
When newly installing the hot water supply device for a bath according to the present embodiment described above, the hot water supply device main body 1 and the bathtub 4 are securely connected by the bath connection pipes 2 and 3, that is, the water tightness is maintained. It is necessary to conduct a watertight inspection to confirm that no water leak has occurred. Similarly, a watertight inspection for the connection between the hot water supply body 1 and the hot air heater 7, a watertight inspection for the connection between the hot water supply body 1 and the first floor heater 10, and the hot water supply body 1 and the second floor heating. It is also necessary to carry out a watertight inspection on the connection with the machine 13. In addition, about the watertightness of each piping in the hot water supply apparatus main body 1, it is ensured by the shipping inspection. Hereinafter, the watertight inspection in the present embodiment will be described with reference to the flowcharts shown in FIGS.
[0047]
FIG. 2 shows a procedure of a preparation process for performing a watertight inspection. First, in STEP 1 and STEP 2, the inspection operator opens the heating on-off valve 56 and the heating return on-off valve 57 which are manual on-off valves. Then, in STEP 3, the connection pipe opening / closing valve 81, which is a manual open / close valve, is opened, and in STEP 4, a test operation switch (not shown) provided in the hot water supply device body 1 is turned ON. By turning on the trial operation switch, the controller 14 opens the hot water solenoid valve 32 in a state where the operation of the hot water supply burner 21 is stopped, and starts a trial operation operation for supplying water to the bathtub 4. By this trial operation operation, water supply to the bathtub 4 is started via the hot water filling pipe 31 and the bath circulation circuit 72.
[0048]
Then, in STEP 5, it is assumed that the inspection worker is supplied with water from the bath circulation circuit 72 to the communication pipe 80 and fills the communication pipe 80 with water (air in the communication pipe 80 is replaced with water). After waiting for 10 seconds, in STEP 6, the connection pipe opening / closing valve 81 is closed to prevent water supply from the communication pipe 80 to the heating circulation circuit 42 and water from overflowing from the systern 45.
[0049]
In this state, the inspection worker advances the water supply to the bathtub 4 so that the water level in the bathtub 4 becomes equal to or higher than the forward circulation port 82 and the backward circulation port 83 (STEP 7), and air flows from the forward circulation port 82 and the backward circulation port 83. It waits for a state that is not in progress (STEP 8). That is, it waits until the bath circulation circuit 72 is filled with water.
[0050]
Then, in STEP 9, the inspection operator terminates the trial operation by turning off the trial operation switch and stops water supply to the bathtub 4, and covers the forward circulation port 82 and the return circulation port 83 and shields it from the bathtub 84 in STEP 10. A bath adapter 84 is attached. By installing the bath adapter 84, the bath circulation circuit 72 becomes a closed circuit.
[0051]
Next, the inspection operator turns on a heating water filling switch (not shown) provided in the hot water supply apparatus main body 1 in STEP 11. By turning on the heating water filling switch, the controller 14 opens the make-up water electromagnetic valve 47 and starts water supply from the water supply pipe 23 to the heating circulation circuit 42 through the make-up water pipe 46 and the first floor warming motion The valve 58 and the second floor warming valve 59 are opened.
[0052]
Then, the controller 14 detects the amount of water supply in the heating circulation circuit 42 based on the output signals from the low water level electrode 48 and the high water level electrode 49 provided in the cistern 45, and when the water supply amount reaches a predetermined amount, the makeup water The solenoid valve 47, the first floor warming valve 58, and the second floor warming valve 59 are closed, and the water supply to the heating circuit 42 is terminated. As a result, the heating circuit 42, the hot air heater connecting pipes 5, 6, and the hot air heater 7, the first floor heater connecting pipes 8 and 9, the first floor heater 10, The two floor heater connection pipes 11 and 12 and the second floor heater 13 are filled with water.
[0053]
Then, in this state, the inspection operator opens the connection pipe opening / closing valve 81 again in STEP 13 to connect the bath circulation circuit 72 and the heating circulation circuit 42 via the communication pipe 80, and in STEP 14 and STEP 15, the heating forward path The on-off valve 56 and the heating return path on-off valve 57 are closed. The valve closing process of STEP14 and STEP15 is a process for preventing the pressure from escaping from the cistern 45 when a pressure is applied from the bath circulation circuit 72 side in a watertight inspection described later.
[0054]
The preparation for performing the watertight inspection is completed by the processing of STEP1 to STEP15 of FIGS. In this state, the inspection operator operates the watertight inspection means 19 provided in the controller 14 to perform the watertight inspection.
[0055]
The water-tightness inspection means 19 first supplies water to the bath circulation circuit 72 in a state where the above-described preparation processing is completed, and the heating circulation circuit 72 connected to the bath circulation circuit 72 and the heating circulation circuit 42 connected to the communication pipe 80 is heated. The water pressure inside the passage (hereinafter referred to as a heating closed circulation circuit) closed by the forward path opening / closing valve 56, the heating return path opening / closing valve 57, the first floor warming / heating valve 58, and the second floor warming / heating valve 59 is predetermined. The water supply is stopped by raising to the reference value (hereinafter referred to as water pressure increase processing).
[0056]
And next, the water-tightness inspection means 19 detects the degree of decrease in the detected water pressure by the water level sensor 34 after stopping the water supply, and compares the detected degree of decrease with a predetermined reference degree of decrease, so that the water heater main body 1 and The quality of the watertight state of the connection pipe line between the bathtub 4, the hot air heater 7, the first floor heater 10, and the second floor heater 13 is determined (hereinafter referred to as a decrease degree determination process).
[0057]
4 and 5, STEP4 to STEP17 are portions for performing the water pressure increasing process, and STEP20 to STEP26 branched from STEP4 are portions for performing the decrease degree determining process.
[0058]
Referring to FIG. 4, when an inspection operator turns on a watertight inspection switch (not shown) provided in hot water supply body 1 in STEP 1, watertight inspection means 19 first starts the water pressure increasing process, and in STEP 2, hot water heat exchange is performed. In order to limit the water supply flow rate from the vessel 22 to the bath circulation circuit 72, the water amount servo 24 is set to the minimum opening. By limiting the flow rate of the water supply to the bath circulation circuit 72 in this way, water can be supplied to the bath circulation circuit 72 by a minute amount, and the water pressure in the bath circulation circuit 72 can be gradually increased.
[0059]
Then, the water tightness inspection means 19 determines the water pressure detected by the water level sensor 34 at the start of the water tightness check in STEP 3 as the initial water pressure P ₀ Is stored in the storage means 20, and in STEP 4, the detected water pressure P of the water level sensor 34 is a reference value (1.5 kgf / cm ² ) If this is the case, the process branches to STEP 20 and proceeds from the water pressure increase process to the decrease degree determination process.
[0060]
On the other hand, in STEP 4, the detected water pressure P of the water level sensor is the reference value (1.5 kgf / cm ² ), The process proceeds to STEP 5 where the hot water solenoid valve 32 is opened and closed for 0.05 seconds, and when 10 seconds have elapsed after the valve closing, the detected water pressure P of the water level sensor 34 is determined to be a reference value (step 6). 1.5kgf / cm ² ) Judge whether or not it has risen above.
[0061]
In STEP6, the detected water pressure P is the reference value (1.5 kgf / cm ² ), The process branches to STEP 20 and proceeds to the lowering degree determination process. The reference value (1.5 kgf / cm ² If it is less than (), go to STEP7. Then, in STEP 7, as in STEP 5, the hot water solenoid valve 32 is opened and closed for 0.05 seconds, and in STEP 8, the detected water pressure P of the water level sensor 34 is the reference value (1.5 kgf / cm). ² ) If this is the case, branch to STEP20.
[0062]
Then, the water-tightness inspection means 19 uses the initial water pressure P held in the storage means 20 in STEP 9. ₀ Is calculated from the difference between the detected water pressure P and the current detected water pressure P, and the degree of increase (increase) of the detected water pressure P is calculated, and the degree of increase is 0.5 kgf / cm. ² When it is above (corresponding to the first standard degree of the present invention), the loop of STEP7 to STEP9 is repeatedly executed via STEP40. As a result, the hot water solenoid valve 32 is opened and closed with a valve opening time of 0.05 seconds (corresponding to the supply execution period of the present invention) and a valve closing time of 10 seconds (corresponding to the supply stop period of the present invention). The water supply is intermittently performed.
[0063]
By the intermittent hot water supply operation of STEP7 to STEP9, the detected water pressure P by the water level sensor 34 at STEP8 is the reference value (1.5 kgf / cm ² ) When the above is reached, the process branches to STEP 20 and proceeds to the decrease degree determination process. Moreover, even if the loop of STEP7 to STEP9 is executed 26 times, the detected water pressure P of the water level sensor 34 remains at the reference value (1.5 kgf / cm ² ) If not, the process branches from STEP 40 to STEP 41, and the watertight inspection means 19 notifies the inspection operator that the inspection is not possible by means of notifying means (not shown) provided in the hot water supply apparatus main body 1.
[0064]
On the other hand, in STEP 9, the degree of increase in the water pressure detected by the water level sensor 34 is 0.5 kgf / cm. ² If it is less, the process proceeds to STEP 10 in FIG. 5 and the valve opening time of the hot water solenoid valve 32 (corresponding to the supply execution time of the present invention) is extended from 0.05 seconds to 1 second. Then, in STEP 11 when 10 seconds have passed after the hot water solenoid valve 32 is closed, the detected water level of the water level sensor 34 is the reference value (1.5 kgf / cm ² ) If it is above, the process branches to STEP 20 and proceeds to the decrease degree determination process.
[0065]
In STEP 11, the detected water pressure P of the water level sensor 34 is a reference value (1.5 kgf / cm ² ), The loop of STEP12 to STEP14 is executed. The loop of STEP12 to STEP14 extends the valve opening time of the hot water solenoid valve 32 from 0.05 second to 1.0 second, and performs the intermittent water supply operation similar to the loop of STEP7 to STEP9 described above.
[0066]
The water-tightness inspection means 19 extends the valve opening time (corresponding to the supply implementation period of the present invention) of the hot water solenoid valve 32 in this way, so that the amount of water supplied to the bath circulation circuit 72 in a single intermittent water supply. In order to increase the degree of water pressure increase in the bath circulation circuit 72. Thereby, the time which the said water pressure rise process requires can be shortened.
[0067]
And the water tightness inspection means 19 is the initial water pressure P in STEP14. ₀ The degree of increase in the detected water pressure P relative to the pressure is 0.7 kgf / cm ² If it is less than (corresponding to the second standard degree of the present invention), the process proceeds to STEP 15 and the opening time of the hot water solenoid valve 32 (corresponding to the supply period of the present invention) is further extended to 0.3 seconds. Then, a loop of STEP 15 to STEP 17 is executed to supply water intermittently to the bath circulation circuit 72. Thereby, the time required for the water pressure increasing process can be further shortened.
[0068]
Even if the processing of STEP15 to STEP17 is executed 26 times, the detected water pressure of the water level sensor 34 is the reference value (1.5 kgf / cm ² If not, the process proceeds from STEP 17 to STEP 18, and the watertight inspection means 19 notifies the inspection operator that the inspection is not possible by means of notifying means (not shown) provided in the hot water supply apparatus body 1.
[0069]
The water tightness inspection means 19 detects the water pressure detected by the water level sensor 34 as a reference value (1.5 kgf / cm2) by the processing of STEP1 to STEP17. ² ) When the above is reached, the process branches to STEP 20 to start the reduction degree determination process.
[0070]
In the watertight state inspecting means 19, the detected water pressure P of the water level sensor 34 is 2.7 kgf / cm in STEP20. ² ) If this is the case, since the water pressure in the bath circulation circuit 72 is too high to perform a normal watertight inspection, the process branches to STEP 30 and the watertight inspection means 19 is provided by a not-shown notification means provided in the hot water supply apparatus main body 1. Informing the inspection operator that the inspection is impossible.
[0071]
In STEP 20, the detected water pressure P of the water level sensor 34 is 2.7 kgf / cm. ² If it is less than that, the process proceeds to STEP 21, where the detected water pressure of the water level sensor 34 at the present time (the start time of the degree-of-decrease determination process) is set to the start water pressure P _S Is stored in the storage means 20, and a 5-minute timer is started in STEP22.
[0072]
Then, the watertight state inspection means 19 determines the start water pressure P of the detected water pressure P by the water level sensor 34 at STEP 23 before the 5-minute timer expires at STEP 24. _S Degree of decrease from (P-P _S ) Is 0.5kgf / cm ² When it is equal to or greater than (corresponding to a predetermined value of the present invention), it is determined that the water-tightness of the bath circulation circuit 72 or the heating closed circulation circuit is insufficient, and the process branches to STEP 31 and is provided in the water heater main body 1. The notifying means (not shown) notifies the inspection worker that the water tightness is poor.
[0073]
At this time, if it is not possible to specify whether the water-tightness of the bath circulation circuit 72 is insufficient or the water-tightness of the heating closed circulation circuit is insufficient, the bath circulation circuit 72 and the heating closed circulation circuit are connected. It is only necessary to close the connecting pipe opening / closing valve 81 provided in the connecting pipe 80 to be connected, and perform the watertight inspection of only the bath circulation circuit 72 again.
[0074]
As a result of the watertight inspection, if the watertightness is sufficient, it can be determined that the heating closed circuit is defective. On the other hand, if the watertightness is insufficient, is it only the watertightness of the bath circulation circuit 72 or is it insufficient for both the watertightness of the bath circulation circuit 72 and the watertightness of the heating closed circulation circuit? I can't judge.
[0075]
In this case, at least the water-tightness of the bath circulation circuit 72 is insufficient. Therefore, if the bath circulation circuit 72 is first repaired and the water-tightness inspection is performed only for the bath circulation circuit 72 again, the air-tightness of the heating closed circulation circuit is determined. It can be determined whether or not the sex is sufficient.
[0076]
On the other hand, when the 5-minute timer expires in STEP 24, it can be determined that the water tightness is good, but in order to be careful of the water tightness inspection, the water tightness inspection means 19 branches from STEP25 to STEP3 and performs the watertightness inspection again. To do. When the 5-minute timer expires at STEP 24 in the second water-tightness inspection, the process proceeds from STEP 25 to STEP 26, and it is determined that the water-tightness of the bath circulation circuit 72 and the heating closed circulation circuit is sufficient. 1 is informed to the inspection operator that the water tightness is good.
[0077]
When the inspection worker confirms the notification that the water tightness is good, the water heater main body 1, the bathtub 4, the hot air heater 7, the first floor heater, and the second floor heater It is judged that the connection is made normally with watertightness, and the watertightness inspection is finished.
[0078]
In this embodiment, in the flowcharts shown in FIGS. 4 and 5, the water pressure in the bathtub circulation circuit 72 is detected by the water level sensor 34 when 10 seconds have elapsed after the hot water solenoid valve 32 is closed. Reference value (1.5 kgf / cm ² ), The water pressure is detected a plurality of times, for example, after 5 seconds have elapsed after the hot water solenoid valve 32 is closed, and the average value of the detected water pressure is determined as the reference value (1.5 kgf / cm). ² ) May be compared.
[0079]
In this embodiment, the water pressure detected by the water level sensor 34 at the start of the watertight inspection is set to the initial water pressure P. ₀ (STEP 3 in FIG. 4), however, the initial water pressure P is affected by the installation state of the bath circulation line 72 and the heating circulation circuit 42, the influence of the outside air temperature, and the like. ₀ May not be stable. In this case, the water pressure detected by the water level sensor 34 is changed to the initial water pressure P after the preliminary overpressure treatment in which the intermittent hot water supply shown in STEP 5 in FIG. ₀ By doing so, the initial water pressure P ₀ May be stabilized.
[0080]
Further, in the present embodiment, a hot water heater for a bath to which a hot air heater and a floor heater are connected as an indoor heater has been shown. However, in a hot water heater for a bath to which another indoor heater, for example, a panel heater or the like is connected, There may be.
[0081]
In the present embodiment, a hot water supply apparatus for baths that supplies hot water using a heat exchanger heated by a gas burner has been shown. However, hot water supply is performed using other types of heating means such as an electric heater and a kerosene burner. It may be a hot water supply device for a bath.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a hot water supply apparatus for a bath according to the present invention.
FIG. 2 is a process flowchart of a water tightness test in the hot water supply apparatus for baths shown in FIG.
FIG. 3 is a process flowchart of a water tightness inspection in the hot water supply apparatus for baths shown in FIG. 1;
4 is a process flowchart of a water tightness inspection in the hot water supply apparatus for baths shown in FIG. 1;
FIG. 5 is a process flowchart of a water tightness test in the hot water supply apparatus for baths shown in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Hot-water supply apparatus main body, 2, 3 ... Bath connection pipe, 4 ... Bathtub, 5, 6 ... Hot air heater connection pipe, 7 ... Hot air heater, 8, 9 ... First floor heater connection pipe, 10 ... 1st floor heater, 11, 12 ... 2nd floor heater connection pipe, 13 ... 2nd floor heater, 14 ... Controller, 15 ... Hot water supply means, 16 ... Bath reheating means, 17 ... Hot water heating means, 18 ... Remote control, 19 ... Water tightness inspection means, 20 ... Storage means, 21 ... Hot water supply burner, 22 ... Hot water supply heat exchanger, 23 ... Water supply pipe, 24 ... Water quantity servo, 25 ... Water supply flow rate sensor, 26 ... Hot water pipe, 27 ... Bypass pipe 28 ... Bypass servo, 29 ... Hot water supply pipe, 30 ... Hot water supply temperature sensor, 31 ... Hot water filling pipe, 32 ... Hot water filling solenoid valve, 33 ... Hot water filling flow sensor, 34 ... Water level sensor, 35 ... Hot water supply fan, 36 ... original Solenoid valve, 37 ... Hot water proportional valve, 38 ... Hot water solenoid valve, 39 ... First hot water supply off Solenoid valve, 40 ... second hot water supply switching solenoid valve, 41 ... hot water supply ignition electrode, 42 ... heating circulation circuit, 43 ... heating pump, 44 ... heating temperature sensor, 45 ... systern, 46 ... make-up water pipe, 47 ... make-up water solenoid valve 48, 49 ... water level electrode, 50 ... heating fan, 51 ... heating proportional valve, 52 ... heating solenoid valve, 53 ... heating switching solenoid valve, 54 ... heating ignition electrode, 55 ... heating frame rod, 56 ... heating forward path on / off valve 57 ... Heating return path on-off valve, 58 ... First floor warming valve, 59 ... Second floor warming valve, 60 ... Floor heating branch pipe, 70 ... Reheating heat exchanger, 71 ... Bath heat valve, 72 ... Bath circulation circuit, 73 ... Bath circulation pump, 74 ... Bath temperature sensor, 75 ... Bath water flow switch, 80 ... Communication pipe, 81 ... Communication pipe on / off valve

Claims

Bath replenishing means for recirculating hot water in a bathtub through a bath circulation circuit, hot water supply means for supplying hot water to the bathtub via a hot water filling circuit connected to the bath circulation circuit, and the bathtub A water level sensor for detecting the water level by hydrostatic pressure in the bath circulation circuit,
The hot water supply is started by the hot water supply means in a state where the hot water is filled in the bath circulation circuit and the forward circulation port and the backward circulation port of the bathtub to which the bath circulation circuit is connected are shielded from the bath layer, When the water pressure detected by the water level sensor exceeds a reference value, the supply of hot water is stopped, the degree of decrease in the detected water pressure by the water level sensor after the stop is detected, and the degree of decrease is equal to or greater than a predetermined value. Sometimes, in the hot water supply device for a bath provided with a watertight inspection means for performing a watertight inspection to determine that water leakage has occurred from the bath circulation circuit,
The water-tightness inspection means intermittently supplies the hot water until the water pressure detected by the water level sensor exceeds the reference value, and detects the water pressure detected by the water level sensor during the intermittent supply of hot water. A hot water supply apparatus for a bath characterized in that when the degree of rise is detected and the degree of rise is smaller than the first reference degree, the supply implementation period in the intermittent hot water supply is extended.

Bath replenishing means for recirculating hot water in the bathtub through a bath circulation circuit, hot water supply means for supplying hot water to the bathtub via a hot water filling circuit connected to the bath circulation circuit, and heating A hot water heating means for circulating hot water heated through a circulation circuit and an indoor heater, a communication pipe communicating the bath circulation circuit and the heating circulation circuit, and a water level of the bathtub in the bath circulation circuit A water level sensor that detects by hydrostatic pressure, and the bath circulation circuit and the heating circulation circuit are filled with hot water, and the forward circulation port and the return circulation port of the bathtub to which the bath circulation circuit is connected are shielded from the bathtub. The hot water supply is started by the hot water supply means in a state, the hot water supply is stopped when the water pressure detected by the water level sensor exceeds a reference value, and the degree of decrease in the detected water pressure by the water level sensor after the stop is stopped. Detect In a hot water supply apparatus for a bath provided with watertight inspection means for performing watertight inspection to determine that water leakage has occurred from the bath circulation circuit or the heating circulation circuit when the degree of decrease is a predetermined value or more,
The water-tightness inspection means intermittently supplies the hot water until the water pressure detected by the water level sensor exceeds the reference value, and detects the water pressure detected by the water level sensor during the intermittent supply of hot water. A hot water supply apparatus for a bath characterized in that when the degree of rise is detected and the degree of rise is smaller than the first reference degree, the supply implementation period in the intermittent hot water supply is extended.

Flow rate control means for adjusting the supply flow rate of hot water from the hot water supply means is provided, and the water tightness check means limits the supply flow rate to a predetermined amount by the flow rate control means and supplies hot water by the hot water supply means. The hot water supply apparatus for baths according to claim 1 or 2.

Comprising storage means for storing the water pressure detected by the water level sensor when the intermittent water supply by the water tightness inspection means is started.
The said water-tightness inspection means detects the said increase degree by the difference of the detected water pressure memorize | stored in the said memory | storage means, and the water pressure detected by the said water level sensor at the time of a watertight state determination. A hot water supply apparatus for a bath according to any one of the above.

The water-tightness inspection means detects the degree of increase in the water pressure detected by the water level sensor again during the supply stop period in the intermittent hot water supply after extending the supply execution period in the intermittent hot water supply, The hot water supply device for a bath according to any one of claims 1 to 4, wherein when the degree of increase is smaller than the second reference degree, the supply implementation period in the intermittent hot water supply is further extended. .

The water-tightness inspection means detects the degree of increase in water pressure detected by the water level sensor after a predetermined time has elapsed since the supply of hot water by the hot water supply means was stopped in the intermittent hot water supply. Item 6. A hot water supply apparatus for a bath according to any one of Items 1 to 5.