JP4030218B2

JP4030218B2 - Heat source machine

Info

Publication number: JP4030218B2
Application number: JP06643599A
Authority: JP
Inventors: 雄彦西尾; 一人山本; 忍石原; 雅由保川
Original assignee: Osaka Gas Co Ltd
Current assignee: Osaka Gas Co Ltd
Priority date: 1999-03-12
Filing date: 1999-03-12
Publication date: 2008-01-09
Anticipated expiration: 2019-03-12
Also published as: JP2000266404A

Description

【０００１】
【発明の属する技術分野】
本発明は、端末器に循環供給する湯水の戻り口から加熱手段を経由して湯水の吐出口に至る湯水通路、及び、この湯水通路に水道水路から給水する開閉式の給水手段を備えている熱源機に関する。
【０００２】
【従来の技術】
上記熱源機によって給湯するシステムの施工を行った際など、前記湯水循環路の気密試験を行う場合、従来、湯水循環路にコンプレッサーを接続して圧縮空気を供給することによって湯水通流管の内部を加圧し、試験圧まで加圧した後の圧力変化の有無や大きさを圧力計によって検出することにより、所定の気密状態になっているか否かを判定されていた。
【０００３】
【発明が解決しようとする課題】
従来、上記した気密試験を行う際、コンプレッサーを準備するとともに接続する費用や手間が掛かり、コスト高になっていた。
本発明の目的は、上記した気密試験が経済面でも手間面でも有利にできる熱源機を提供することにある。
【０００４】
【課題を解決するための手段】
目的達成のために、請求項１に記載の発明によれば、冒頭に記した熱源機において、端末器を接続して気密試験を実行させる指令を出力すると、給水制御手段が給水手段を操作させ、湯水循環路が水道水路から給水されて水道水圧で加圧される。このとき、給水手段が一気に開放されると、湯水循環路が一気に給水されて加圧されるため、水道水圧が高い場合、湯水循環路が高圧になり、水圧センサの検出可能な最高圧力が比較的低い場合にはその検出可能圧力を越えるとか、湯水循環路の配管や部品に異常な歪みが出るとかの事態が発生しやすくなる。これに対し、給水手段が繰り返し開閉操作されて湯水循環路に徐々に給水され、湯水循環路が気密試験に必要なものとして設定した設定試験圧まで徐々に加圧され、水道水圧が高い場合でも、湯水循環路の圧力がセンサの検出可能範囲を越えるとか、配管などに高圧が掛かる事態の発生を防止しながら、湯水循環路を水道水によって設定試験圧まで加圧できるものである。
これにより、水道水圧が低い場合のみならず、高い場合でも、湯水循環路の内圧が高くなり過ぎてセンサの検出可能範囲を越えるとか、配管に異常な歪みを発生させるとかの悪影響が出ることのないように湯水循環路を設定試験圧まで加圧する加圧手段に水道水圧を利用し、コンプレッサーを使用していた従来に比して安価に湯水循環路を気密試験できるようになった。
【０００５】
又、請求項１に記載の発明によれば、水圧センサが設定試験圧を検出してから第１設定経過時間が経過した後に、再度、給水手段を繰り返し開閉操作して設定試験圧まで給水させるものである。
すなわち、たとえば湯水循環路が樹脂管で成る場合、湯水循環路の圧力が設定試験圧に達しても、この後に湯水循環路が膨張してその圧力が低下し、この圧力低下が漏れによるものかどうか判定できなくなることがある。この場合でも、内圧低下にかかわらずさらに加圧していって時間が経過するに伴い、湯水循環路が膨張による圧力低下の発生しにくい安定した状態に至り、圧力低下があれば漏れによるものと判定できるようになる。このため、設定試験圧まで加圧した後、これから膨張が発生するまでに掛かるものとして設定した前記第１設定経過時間が経過した後に、再度給水して設定試験圧まで加圧され、湯水循環路が加圧による膨張の発生しやすいものであっても、前記安定状態になってから圧力変化を検出できるようにしたものである。これにより、水道水圧を利用して安価に気密試験できるものが、湯水循環路が膨張しやすい場合もそうでない場合も精度よく試験できる状態に得られる。
【０００６】
さらに、請求項１に記載の発明によれば、設定試験圧に加圧した湯水循環路における圧力変化の有無が水圧センサと判定手段とによって判定され、この判定結果が報知手段によって自動的に報知され、報知手段による報知を知るだけで気密試験の結果を知ることができるものであるから、報知手段による報知を知るだけで容易かつ確実に所定の気密状態になっているか否かを判定できる。
【０００７】
請求項２に記載の発明によれば、給水手段が設定基準開き回数以上開き操作されて給水されても、湯水循環路の圧力が設定圧以上に達していないとか、湯水循環路の圧力増加量が設定増加量に達していないとかの検出状態に水圧センサがなっていると、給水手段の１回の開き操作時間が増加され、それまでの開き操作時間のままで給水手段を繰り返し開閉操作して設定試験圧まで給水していくに比べ、給水手段が一回開いて給水することに起因する湯水循環路の圧力上昇分が増大して、設定試験圧まで迅速に昇圧するようにして給水されるものである。これにより、水道水圧が高い場合でも設定試験圧以上の高圧が掛からないように徐々に加圧させる割りには、設定試験圧まで極力迅速に加圧して気密試験を能率よく行える。
【０００８】
請求項３に記載の発明によれば、風呂用湯水通路の圧力を水圧センサによって検出しながら湯水循環路を設定試験圧まで加圧させ、通常時には、その水圧センサが検出する風呂用湯水通路の圧力に基づいて浴槽の水位を検出させ、浴槽に所望量の湯水が自動的に供給されるように構成することを可能にするものだから、気密試験も自動湯張りも、水圧センサを兼用して構造簡単かつ安価に行うことが可能である。
【０００９】
請求項４に記載の発明によれば、風呂用湯水通路を連絡管によって暖房器側の湯水通流管に連通させることにより、風呂用の湯水循環路に供給される水圧を暖房端末器側の湯水通流管にも供給し、この湯水通流管も水道水圧で設定試験圧まで徐々に加圧できるものだから、水道水圧の低い場合も高い場合も、風呂用と暖房用のいずれの湯水通路も、水道水圧を加圧手段に利用して安価に気密試験できる。
【００１０】
【発明の実施の形態】
図１に示すように、フィンチューブ型の給湯熱交換器２を備える一般給湯装置１と、フィンチューブ型の追焚熱交換器１１を備える風呂給湯装置１０と、フィンチューブ型の暖房熱交換器２１を備える暖房熱源機２０と、給湯熱交換器２及び追焚熱交換器１１を給湯ガスバーナ３１によって加熱し、暖房熱交換器２１を暖房ガスバーナ３２によって加熱する加熱装置３０と、各装置１，１０，２０，３０の運転を司る制御装置４０とにより、一般家庭用の給湯装置を構成してある。この給湯装置は、カランやシャワーなどの一般給湯栓３に湯水を供給する給湯、浴槽１２に湯水を張るとか浴槽１２の湯水を追焚する給湯、床暖房装置、浴室暖房装置、食器洗浄機、ファンコンベクタなどの高温暖房端末器５０や低温暖房端末器５１に湯水を熱媒として循環供給する給湯を行うものであり、詳しくは次の如く構成してある。
【００１１】
加熱装置３０は、前記給湯ガスバーナ３１に接続する給湯ガス供給路３３と、この給湯ガス供給路３３の途中から分岐して暖房ガスバーナ３２に接続する暖房ガス供給路３４とを備えており、給湯ガス供給路３３が有するガス取入れ口３３ｅを家庭用のガス供給管に接続することにより、このガス供給管からのガスを給湯ガス供給路３３によって給湯ガスバーナ３１に供給して燃焼させて給湯熱交換器２及び追焚熱交換器１１を加熱し、ガス供給管からのガスを暖房ガス供給路３４によって暖房ガスバーナ３２に供給して燃焼させて暖房熱交換器２１を加熱する。
前記給湯ガス供給路３３には、元ガス電磁弁３３ａ、給湯ガス比例弁３３ｂ、給湯ガス電磁弁３３ｃ、ガス切替電磁弁３３ｄを備え、前記暖房ガス供給路３４には、暖房ガス電磁弁３４ｅ及び暖房ガス比例弁３４ｆを備えてある。
【００１２】
一般給湯装置１は、前記給湯熱交換器２の入口側に接続する給水路４、給湯熱交換器２の出口側に接続する給湯路５を備えており、給水路４が有する入水口４ｆを家庭用の水道管に接続し、給湯路５の端部に継手を連結して備えさせてある吐出口５ｇを給湯栓３に連通する栓側給湯管７に接続することにより、水道管からの水を給水路４によって給湯熱交換器２に供給して加熱し、加熱後の湯水を給湯路５によって給湯栓３に供給する。
前記給水路４には、水フィルター４ａ、アキュムレータ４ｂ、給水サーミスタ４ｃ、水量センサ４ｄ、水道管からの水を給湯熱交換器２を迂回させて給湯路５に供給する給水バイパス路４ｅを備えてある。給湯路５には、給湯サーミスタ５ａ、給湯熱交換器２からの湯水と給水バイパス路４ｅからの水との混合比を調整するミキシングバルブ５ｂ、ミキシングサーミスタ５ｃ、水比例バルブ５ｄ、割り込み水量センサ５ｅ、過圧防止装置５ｆを備えてある。給湯熱交換器２には、給湯残火安全装置８を備えてある。
【００１３】
風呂給湯装置１０には、前記追焚熱交換器１１の入口側に接続するとともに途中に風呂ポンプ１６を、端部に継手で成る戻り口１３ａをそれぞれ有する風呂戻り路１３と、追焚熱交換器１１の出口側に接続しているとともに端部に継手で成る吐出口１４ａを有する風呂往き路１４とで成り、戻り口１３ａから加熱手段の一例としての追焚熱交換器１１を経由して吐出口１４ａに至る湯水通路１８を備えているとともに、湯水通路１８のうちの前記風呂戻り路１３の途中を前記給湯路５の途中に連通させるとともに途中に開閉式の給水手段の一例としての注湯電磁弁１５ａを有する湯張り路１５を備えている。
すなわち、湯水通路１８の前記戻り口１３ａを、浴槽１２の循環アダプター１２ａに接続する浴槽側戻り路１２ｂと浴槽側往き路１２ｃとで成る湯水通流管１９のうちの前記浴槽側戻り路１２ｂに接続するとともに、湯水通路１８の前記吐出口１４ａを前記湯水通流管１９のうちの前記浴槽側往き路１２ｃに接続して、風呂用の湯水循環路１０ａを形成し、制御装置４０に連係する湯張りスイッチを入りに操作すると、前記注湯電磁弁１５ａが開き操作され、前記給湯路５からの湯水が湯張り路１５によって風呂戻り路１３に供給され、この風呂戻り路１３から追焚熱交換器１１を経由して風呂往き路１４に流入し、吐出口１４ａから浴槽側往き路１２ｃに流入して循環アダプター１２ａから浴槽１２に流入する。すなわち、風呂給湯装置１０は、給湯路５からの湯水を湯張り路１５と湯水路１８とによって追焚加熱手段１１を経由させて浴槽１２に供給するように浴槽１２の湯張りを行う。そして、追焚スイッチを入りに操作すると、風呂ポンプ１６が駆動され、この風呂ポンプ１６の送り作用により、浴槽１２の湯水が循環アダプター１２ａから風呂側戻り路１２ｂに流出して戻り口１３ａから風呂戻り路１３に流入し、この風呂戻り路１３から追焚熱交換器１１を経由して風呂往き路１４に流入し、吐出口１４ａから浴槽側往き路１２ｃに流入して循環アダプター１２ａから浴槽１２に流入する。すなわち、風呂給湯装置１０は、湯水を浴槽１２から取り出し、追焚熱交換器１１で加熱してから浴槽１２に戻すように浴槽１２と追焚熱交換器１１との間で循環させて追焚する。
【００１４】
浴槽１２の湯張りが行われる際、湯水通路１８のうちの風呂戻り路１３の内部圧力に基づいて浴槽１２の水位を検出するように風呂戻り路１３に設けてある水圧センサ１７、浴槽１２に供給する湯水の量を所望量に設定するように制御装置４０に備えてある湯量設定器４１それぞれからの情報に基づいて制御装置４０が注湯電磁弁１５ａを自動的に操作する。すなわち、水圧センサー１７による検出圧が湯量設定器４１による設定湯量に対応するものになるように操作する。これにより、浴槽１２には湯量設定器４１によって設定した所望量の湯水が供給される。
【００１５】
前記湯水通路１８には、さらに、風呂戻りサーミスタ１３ｂ、風呂二方弁１３ｃ、エアー置換用電磁弁１３ｄ、水流スイッチ１３ｅ、風呂往きサーミスタ１１ａを備えてある。
【００１６】
暖房熱源機２０には、継手５２で成る複数個の戻り口５２ａを一端側に有し、他端側に継手５３で成る吐出口５３ａを有する高温暖房通路ＨＲと、前記複数個の戻り口５２ａを一端側に有し、他端側に継手５４で成る吐出口５４ａを有する低温暖房通路ＬＲとを備えてある。前記高温暖房通路ＨＲは、前記暖房熱交換器２１の入口側に接続するとともに途中に熱媒循環ポンプ２７を備える熱媒通路２２と、この熱媒通路２２に出水側が接続している補給水タンク２３と、この補給水タンク２３の入水側に接続しているとともに端部に前記継手５２を備えている暖房戻り路２４と、暖房熱交換器２１の出口側に接続するとともに端部に前記継手５３を備えている高温暖房往き路２５とによって構成してある。熱媒ポンプ２７が駆動されると、このポンプ２７の送り作用により、湯水が戻り口５２ａから暖房戻り路２４、補給水タンク２３、熱媒通路２２を介して暖房熱交換器２１に流入し、この暖房熱交換器２１から高温暖房往き路２５に流出して吐出口５３ａに至ることにより、高温暖房通路ＨＲは、戻り口５２ａからの湯水が暖房熱交換器２１を通って吐出口５３ａから出ていくように、戻り口５２ａから暖房熱交換器２１を経由して吐出口５３ａに至る通路になっている。
前記低温暖房通路ＬＲは、前記熱媒通路２２と、前記補給水タンク２３と、前記暖房戻り路２４と、前記熱媒通路２２の熱媒循環ポンプ２７と暖房熱交換器２１との間に連通しているとともに端部に前記継手５４を備えている低温暖房往き路２６とによって構成してある。前記熱媒循環ポンプ２７が駆動されると、このポンプ２７の送り作用と、前記高温暖房往き路２５の暖房熱交換器２１の近くに備えてある暖房往き高温サーミスタ２５ａ、前記低温暖房往き路２６の前記熱媒通路２２の近くに備えてある暖房往き低温サーミスタ２６ａ、前記暖房戻り路２４に備えてある暖房戻りサーミスタ２４ａそれぞれの検出結果に基づく湯水温度の管理とにより、前記給水路４からタンク給水路２８を介して補給水タンク２３に供給される水道水が熱媒通路２２に流入し、暖房熱交換器２１で加熱された湯水が高温暖房往き路２５に供給されて高温暖房端末器５０に供給され、高温端末器５０から戻る湯水も低温端末器５１から戻る湯水も熱媒通路２２によって補給水タンク２３に戻され、このタンク２３から熱媒通路２２に流入して低温暖房往き路２６に供給されたり、暖房熱交換器２１に供給されたりする。これにより、低温暖房通路ＬＲは、戻り口５２ａからの湯水が暖房熱交換器２１を通って吐出口５４ａから出て行くように、戻り口５２ａから暖房熱交換器２１を経由して吐出口５４ａに至る通路になっている。
【００１７】
すなわち、高温暖房通路ＨＲの前記戻り口５２ａの一つを、高温暖房端末器５０にこれの熱交換部に湯水を通過させるように備えられている湯水通流管５０ａの排出側に接続するとともに、高温暖房通路ＨＲの前記吐出口５３ａを前記湯水通流管５０ａの入水側に接続して、高温暖房用の湯水循環路２０ａを形成する。低温暖房通路ＬＲの前記戻り口５２ａの一つを、低温暖房端末器５１にこれの熱交換部に湯水を通過させるように備えられている湯水通流管５１ａの排出側に接続するとともに、低温暖房通路ＬＲの前記吐出口５４ａを前記湯水通流管５１ａの入水側に接続して、低温暖房側の湯水循環路２０ｂを形成する。そして、制御装置４０の暖房運転スイッチを入りに操作すると、熱媒循環ポンプ２７が駆動され、このポンプ２７の送り作用により、高温暖房通路ＨＲが高温暖房端末器５０の湯水通流管５０ａの湯水を戻り口５２ａから取り入れ、暖房熱交換器２１を経由させて加熱した後に吐出口５３ａから高温暖房端末器５０の湯水通流管５０ａに送り込んでいき、低温暖房通路ＬＲが低温暖房端末器５１の湯水通流管５１ａの湯水を戻り口５２ａから取り入れ、暖房熱交換器２１を経由させて吐出口５４ａから低温暖房端末器５１の湯水通流管５１ａに送り込んでいく。これにより、暖房熱源機２０は、湯水を高温暖房端末器５０及び低温暖房端末器５１から取り出し、暖房熱交換器２１で加熱してから高温暖房端末器５０及び低温暖房端末器５１に戻すように高温暖房端末器５０及び低温暖房端末器５１と暖房熱交換器２１との間で循環させる。
前記タンク給水路２８には、補給水バルブ２８ａ及び補給水電磁弁２８ｂを備えてある。
【００１８】
前記高温暖房往き路２５に連結している前記継手５３、前記低温暖房往き路２６に連結している前記継手５４それぞれを、図２に示す如く構成してある。
すなわち、前記暖房往き路２５，２６に連通する熱源機側接続部５３ｂ，５４ｂを一端側に備え、前記吐出口５３ａ，５４ａを備える筒体５５が中間部に連結している継手本体５３ｃ、５４ｃの内部に切替弁５６を設けてある。図２（イ）に示すように、この切替弁５６の支軸５７の継手本体５３ｃ，５４ｃから外部に突出している端部に回転自在に連結している操作ハンドル５８により、支軸５７を継手本体５３ｃ，５４ｃに対して前記熱源機側接続部５３ｂ，５４ｂとは反対側に摺動操作し、操作ハンドル５８を継手本体５３ｃ、５４ｃから延出している一対のストッパー５９に引っ掛けて支持させ、切替弁５６に作用するスプリング６０によって支軸５７が継手本体５３ｃ，５４ｃの内部に引き戻されることを防止すると、切替弁５６が継手本体５３ｃ，５４ｃの内部に位置する支持部５３ｄ，５４ｄで受け止め支持される湯水通流位置になり、熱源機側接続部５３ｂ，５４ｂと吐出口５３ａ，５４ａとを連通させるべく継手本体５３ｃ，５４ｃの内部通路と前記筒体５５の内部通路とで成る連通路６１を開放する。これにより、継手５３，５４は、熱源機側接続部５３ｂ，５４ｂと吐出口５３ａ，５４ａとを連通させて暖房往き路２５，２６からの湯水が吐出口５３ａ，５４ａから出ることを可能にするように湯水通流状態になる。
図２（ロ）に示すように、操作ハンドル５８を支軸５７に対して回転させて前記ストッパー５９から外し、支軸５７を前記スプリング６０によって継手本体５３ｃ，５４ｃに対して熱源機側接続部５３ｂ，５４ｂの方に摺動操作させると、切替弁５６がスプリング６０によって弁座部材６２に押し付けられた検査位置になり、前記連通路６１を遮断する。これにより、継手５３，５４は、熱源機側接続部５３ｂ，５４ｂと吐出口５３ａ，５４ａとの連通を絶って暖房端末器５０，５１の湯水通流管５０ａ，５１ａからの湯水が暖房往き路２５，２６の側に逆流することを不能にするように検査状態になる。
【００１９】
前記暖房戻り路２４に連結している前記継手５２を、図３に示す如く構成してある。
すなわち、前記暖房戻り路２４に連通する熱源機側接続部５２ｂを一端側に備え、前記複数の戻り口５２ａ，５２ａを備える筒体６３が中間部に連結している継手本体５２ｃの内部に切替弁５６を設け、前記継手本体５２ｃの他方の端部に栓部材６４が着脱自在に付いている検査接続部６５を設けてある。図３（イ）に示すように、前記切替弁５６の支軸５７の継手本体５２ｃから外部に突出している端部に回転自在に連結している操作ハンドル５８により、支軸５７を継手本体５２ｃに対して前記熱源機側接続部５２ｂとは反対側に摺動操作し、操作ハンドル５８を継手本体５２ｃから延出している一対のストッパー５９に引っ掛けて支持させ、切替弁５６に作用するスプリング６０によって支軸５７が継手本体５２ｃの内部に引き戻されることを防止すると、切替弁５６が継手本体５２ｃの内部に位置する支持部５２ｄで受け止め支持される湯水通流位置になり、熱源機側接続部５２ｂと複数の戻り口５２ａ，５２ａとを連通させるべく継手本体５２ｃの内部通路と前記筒体６３の内部通路とで成る連通路６６を開放し、この連通路６６と前記検査接続部６５とを連通させている連通路６７を遮断する。これにより、継手５２は、熱源機側接続部５２ｂと複数の戻り口５２ａ，５２ａとを連通させて暖房端末器５０，５１の湯水通流管５０ａ，５１ａから戻り口５２ａに戻る湯水が暖房戻り路２４に流入することを可能にするように湯水通流状態になる。図３（ロ）に示すように、操作ハンドル５８を支軸５７に対して回転させて前記ストッパー５９から外し、支軸５７を前記スプリング６０によって継手本体５２ｃに対して熱源機側接続部５２ｂの方に摺動操作させると、切替弁５６がスプリング６０によって弁座部材６２に押し付けられた検査位置になり、前記連通路６６を遮断するとともに前記連通路６７を開放する。これにより、継手５２は、熱源機側接続部５２ｂと複数の戻り口５２ａ，５２ａとの連通を絶つとともに検査接続部６５と複数の戻り口５２ａ，５２ａとを連通させ、検査接続部６５からの水道水が補給水タンク２３の方には流出することを不能にしながら戻り口５２ａから高温暖房端末器５０の湯水通流管５０ａ及び低温暖房端末器５１の湯水通流管５１ａに流入することを可能にするように検査状態になる。
【００２０】
図３（ロ）に示すように、前記継手５２の前記検査接続部６５は、前記栓部材６４の外れ止めを行うばね板製のクリップ型栓ホルダー６８と、栓部材６４とを抜き外すことにより、開放できる。開放した検査接続部６５に連絡管６９を接続することにより、風呂給湯装置１０の湯水通路１８における風呂往き路１４の吐出口１４ａを形成している継手が備える水抜き部１４ｂに検査接続部６５を前記連絡管６９によって連通させられる。すなわち、給水路４から風呂用循環路１０ａに供給される水道水が風呂往き路１４の水抜き部１４ｂから継手５２を介して高温暖房端末器５０の湯水通流管５０ａと、低温暖房端末器５１の湯水通流管５１ａとに供給されるように、風呂用の湯水通路１８を連絡管６９により、高温暖房端末器５０の湯水通流管５０ａと、低温暖房端末器５１の湯水通流管５１ａとに連通させられる。
【００２１】
図５に示すように、前記制御装置４０をマイクロコンピュータで構成し、風呂用の湯水循環路１０ａ、暖房用の湯水循環路２０ａ，２０ｂそれぞれの気密試験を行った結果を表示するＬＥＤで成る表示ランプ７０、その試験結果を液晶手段を利用して表示するエラー表示装置７１を前記制御装置４０に連係させてある。試運転の指令を出力して給湯装置の試運転制御を行わせるように制御装置４０に連係させてある自動試運転スイッチ７２と、水張り指令を出力して浴槽１２の水張り制御を行わせるように制御装置４０に連係させてある手動水張りスイッチ７３とを同時に押し操作すると、制御装置４０が前記水圧センサ１７からの情報と図６及び図７に示す制御フローとに基づいて自動的に作動するように構成してある。
【００２２】
すなわち、＃１〜＃４ステップに示すように、自動試運転スイッチ７２と手動水張りスイッチ７３とが同時に押し操作されると、試運転ランプ７４と水張りランプ７５とを点灯させる。これとともに、高温暖房端末器５０及び低温暖房端末器５１に備えられている端末熱動弁を開き操作して湯水通流管５０ａ，５１ａを開き状態にするとともに、注湯電磁弁１５ａの一回当たりの開き操作時間ｔを２０ｍｓｅｃに設定した状態で注湯電磁弁１５ａを繰り返し開閉操作し、風呂用の湯水循環路１０ａに徐々に給水して加圧するとともに、この湯水循環路１０ａから連絡管６９を介して高温暖房側の湯水循環路２０ａにおける湯水通流管５０ａと、低温暖房側の湯水循環路２０ｂにおける湯水通流管５１ａとのそれぞれに徐々に給水して加圧する。このとき、注湯電磁弁１５ａを開き操作する都度、水圧センサ１７によって検出されている圧力がいかなる大きさになっているかチェックする。＃５〜＃８ステップに示すように、注湯電磁弁１５ａを第１設定基準回数以上としての１５回以上開き操作しても、水圧センサ１７が１ｋｇｆ／ｃｍ²以上の圧力を検出しない状態になっていると、注湯電磁弁１５ａの一回当たりの開き操作時間ｔを４０ｍｓｅｃに増加させて設定した状態で注湯電磁弁１５ａを繰り返し開閉操作する。注湯電磁弁１５ａを開き操作する都度、水圧センサ１７によって検出されている圧力がいかなる大きさになっているかチェックし、＃９〜＃１１ステップに示すように、異常回数として設定してある３５回以上注湯電磁弁１５ａを開閉操作しても水圧センサ１７が１．５ｋｇｆ／ｃｍ²以上の内圧を検出しない場合には、前記表示ランプ７０を点灯させて圧力上昇がない異常を表示する。＃１２及び＃１３ステップに示すように、水圧センサ１７による検出圧力が検査圧として設定してある２ｋｇｆ／ｃｍ²以上〜３ｋｇｆ／ｃｍ²以下の範囲の圧力に達しないとともに注湯電磁弁１５ａの操作回数が３５回に達していない場合には、＃４ステップに戻り、再度給水して加圧させる。＃１２〜＃１５ステップに示すように、水圧センサ１７による検出圧力が気密検査に必要な圧力として設定してある２ｋｇｆ／ｃｍ²以上〜３ｋｇｆ／ｃｍ²以下の範囲の圧力になると、これまで計測してきた注湯電磁弁１７の開き操作回数を零にリセットし、この時に水圧センサ１７が検出している圧力を第１初期圧力Ｐ０として記憶するとともにタイマーをスタートさせる。この後、＃１５〜＃２２ステップに示すように、湯水通流管１９，５０ａ，５１ａが樹脂製であって、前記設定試験圧力が掛かった際にこの圧力が掛かってから膨張が発生するまでに掛かる第１設定経過時間として設定してある５分が先のタイマースタートから経過するまでの間における水圧センサ１７による検出圧力Ｐが前記第１初期圧力Ｐ０より０．６ｋｇｆ／ｃｍ²以上低い圧力になった場合には、漏れがあると判定し、この判定結果をエラーＡとして前記エラー表示装置７１に表示させるとともに前記試運転ランプ７４及び水張りランプ７５の両ランプを点滅させて漏れがあることの報知を行わせ、さらに、高温暖房端末器５０及び低温暖房端末器５１の端末熱動弁を閉じに切り換え操作するとともにこの結果を記憶させる。
＃１６，＃１７，＃２３ステップに示すように、先のタイマースタートから前記第１設定経過時間としての５分が経過すると、水圧センサ１７による検出圧力Ｐが前記初期圧力Ｐ０より低下していても、低下していなくても、＃４ステップに戻る。すなわち、湯水通流管１９，５０ａ，５１ａが樹脂製である場合、前記設定試験圧力が掛かって膨張し、内圧が設定試験圧よりも低下することから、再度給水して設定試験圧まで加圧する。尚、再加圧した後の＃１６ステップにおいては、判定基準を１回目の加圧後におけるＰ０−Ｐ＜０．６ｋｇｆ／ｃｍ²からＰ０−Ｐ＜０．３ｋｇｆ／ｃｍ²に変更して判定する。すなわち、タイマースタートから前記第１設定経過時間が経過するまでの間における水圧センサ１７による検出圧力Ｐが前記初期圧力Ｐ０より０．３ｋｇｆ／ｃｍ²以上低い圧力になっているか否かを判定する。
＃２４及び＃２５ステップに示すように、再加圧を行った後、湯水通流管１９，５０ａ，５１ａが樹脂製である場合に再加圧が完了してから膨張による圧力変化の勾配が安定化するまでに掛かる第２設定経過時間として設定してある８分が＃１５ステップにおけるタイマースタートから経過すると、この時に水圧センサ１７が検出している圧力を第２初期圧力Ｐ１として記憶するとともにタイマーを再スタートさせる。この後、＃２６〜＃２９ステップに示すように、＃２５ステップにおけるタイマースタートから第３設定経過時間として設定してある５分が経過するまでの間における水圧センサ１７による検出圧力Ｐが前記第２初期圧力Ｐ１より０．０８ｋｇｆ／ｃｍ²以上低い圧力になった場合には、漏れがあると判定し、この判定結果をエラーＢとして前記エラー表示装置７１に表示させるとともに＃２０ステップに移り、前記試運転ランプ７４及び水張りランプ７５の両ランプを点滅させて報知し、さらに、高温暖房端末器５０及び低温暖房端末器５１の端末熱動弁を閉じに切り換え操作するとともにこの結果を記憶させる。
＃３０〜＃３５に示すように、＃２５ステップにおけるタイマースタートから第３設定経過時間としての５分が経過した時の水圧センサ１７による検出圧力Ｐが前記第２初期圧力Ｐ１より０．０３ｋｇｆ／ｃｍ²以上低い圧力になっており、さらに、＃１５ステップにおけるタイマースタートから第４設定経過時間としての２０分が経過した時の水圧センサ１７による検出圧力Ｐが前記第１初期圧力Ｐ０より０．１５ｋｇｆ／ｃｍ²以上低い圧力で、かつ、前記第２初期圧力Ｐ１より０．０８ｋｇｆ／ｃｍ²以上低い圧力になっていると、漏れがあると判定し、この判定結果をエラーＣとして前記エラー表示装置７１に表示させるとともに＃２０ステップに移り、前記試運転ランプ７４及び水張りランプ７５の両ランプを点滅させて漏れがあることの報知を行い、さらに、高温暖房端末器５０及び低温暖房端末器５１の端末熱動弁を閉じに切り換え操作するとともにこの結果を記憶させる。
＃３０〜＃３３ステップ及び＃３６〜＃３９ステップに示すように、＃２５ステップにおけるタイマースタートから第３設定経過時間としての５分が経過した時の水圧センサ１７による検出圧力Ｐが前記第２初期圧力Ｐ１より低下していなか、低下していても低下分の圧力が０．０３ｋｇｆ／ｃｍ²より小である場合、あるいは、＃２５ステップにおけるタイマースタートから第３設定経過時間としての５分が経過した時の水圧センサ１７による検出圧力Ｐが前記第２初期圧力Ｐ１より０．０３ｋｇｆ／ｃｍ²以上低い圧力になっていても、＃１５ステップにおけるタイマースタートから第４設定経過時間としての２０分が経過した時の水圧センサ１７による検出圧力Ｐが前記第１初期圧力Ｐ０より低下していないか、低下していても低下分の圧力が０．１５ｋｇｆ／ｃｍ²より小である場合、あるいは、＃２５ステップにおけるタイマースタートから第３設定経過時間としての５分が経過した時の水圧センサ１７による検出圧力Ｐが前記第２初期圧力Ｐ１より０．０３ｋｇｆ／ｃｍ²以上低い圧力になっており、かつ、＃１５ステップにおけるタイマースタートから第４設定経過時間としての２０分が経過した時の水圧センサ１７による検出圧力Ｐが前記第１初期圧力Ｐ０より０．１５ｋｇｆ／ｃｍ²以上低い圧力になっていても、＃１５ステップにおけるタイマースタートから第４設定経過時間としての２０分が経過した時の水圧センサ１７による検出圧力Ｐが前記第２初期圧力Ｐ１より低下していないか、低下していても低下分の圧力が０．０８ｋｇｆ／ｃｍ²より小である場合のそれぞれにおいては、漏れがないと判定し、高温暖房端末器５０及び低温暖房端末器５１の端末熱動弁を閉じに切り換え操作するとともにこの結果を記憶させ、さらに、試運転ランプ７４及び水張りランプ７５を消灯させて漏れが無いことの報知を行う。
【００２３】
これにより、＃４〜＃１０ステップ、＃１２〜＃１７ステップ、＃２３ステップが循環湯路１０ａ，２０ａ，２０ｂを気密試験するための給水制御手段７６を構成しており、この給水制御手段７６は、自動試運転スイッチ７２と手動水張りスイッチ７３が操作されて気密試験の実行の指令が出力されるに伴い、注湯電磁弁１５ａを繰り返し開閉操作して水圧センサ１７が前記設定試験圧を検出するまで風呂給湯装置１０の湯水循環路１０ａ、及び、暖房用の湯水循環路２０ａ及び２０ｂの湯水通流管５０ａ，５１ａに徐々に給水させることにより、風呂用の湯水循環路１０ａ、及び、暖房端末器側の湯水通流管５０ａ，５１ａを設定試験圧まで徐々に加圧していく。そして、この加圧を行うに当たり、第１設定基準回数以上として１５回以上注湯電磁弁１５ａを開き操作しても、水圧センサ１７が１ｋｇｆ／ｃｍ²以上を検出しない状態にあれば、注湯電磁弁１５ａの一回当たりの開操作時間ｔを２０ｍｓｅｃから４０ｍｓｅｃに増加させて圧力上昇の促進を図りながら加圧していき、さらに、水圧センサ１７が設定試験圧を検出してから前記第１設定経過時間としての５分が経過した後、再度、注湯電磁弁１５ａを開閉操作して水圧センサ１７が設定試験圧を検出するまで給水させ、湯水循環路１０ａ、湯水通流管５０ａ，５１ａが膨張しても設定試験圧になるように加圧していく。
【００２４】
＃１５〜＃１８ステップと、＃２５〜＃２８ステップと、＃２５〜＃３２及び＃３４ステップとのそれぞれが判定手段７７ａ，７７ｂ，７７ｃを構成しており、この判定手段７７ａ，７７ｂ，７７ｃは、水圧センサー１７の設定試験圧を検出した後における検出圧に設定圧以上の減少変化があるか否かを判定し、エラー表示装置７１、試験運転ランプ７４、水張りランプ７５を判定結果の表示が行われるように自動的に操作する。
【００２５】
つまり、浴槽１２、暖房端末器５０，５１を接続して湯水循環路１０ａ，５０ａ，５１ａを形成した後など、風呂用の湯水循環路１０ａや暖房端末器側の湯水通流管５０ａ，５１ａの気密検査を次の如く行えるようにしてある。
すなわち、図１および図４に示す如く浴槽１２の循環アダプター１２ａに、これの湯水給排出口を閉じる安全弁付きの栓部材８０を取り付けるとともに、暖房戻り路２４が備える継手５２の検査接続部６５を前記連絡管６９によって風呂往き路１４の前記水抜き部１４ｂに接続して連通させる。暖房戻り路２４、高温暖房往き路２５、低温暖房往き路２６それぞれの前記継手５２，５３，５４を前記熱媒通流状態に切り換えた状態にし、前記栓部材８０の安全弁を開にするとともに注湯電磁弁１５ａを開き、湯張り路１５から風呂用の湯水循環路１０ａに、この湯水循環路１０ａから連絡管６９にそれぞれ給水して湯水循環路１０ａおよび連絡管６９に水を充満させるとともにこれらの空気抜きを行う。次に、前記栓部材８０の安全弁を閉じに切り換え、タンク給水路２８を開いて熱媒循環ポンプ２７を駆動し、高温側の湯水循環路２０ａと低温側の湯水循環経路２０ｂとのそれぞれに水を供給し、補給水タンク２３の下限センサ２３ａが検出状態になってから設定時間が経過すれば給水を停止し、湯水循環路２０ａと２０ｂに水を充満させるとともにこれらの空気抜きを行う。すなわち、内部空気を補給水タンク２３から流出させる。この空気抜きが完了すると、高温暖房往き路２５、低温暖房往き路２６、暖房戻り路２４それぞれの継手５３，５４，５２を前記検査状態に切り換えてから、自動試運転スイッチ７２と手動水張りスイッチ７３とを同時に入り操作して気密試験を実行させる指令を与える。
すると、給水制御手段７６が作動して注湯電磁弁１５ａを繰り返し開閉操作する。このとき、注湯電磁弁１５ａの一回の開き操作時間を２０ｍｓｅｃで開閉操作を開始し、１５回以上開き操作しても水圧センサ１７による検出圧が１ｋｇｆ／ｃｍ²以上にならない場合には、注湯電磁弁１５ａの一回の開き操作時間を４０ｍｓｅｃに増加させて開閉操作を繰り返していく。これにより、給水路４からの水道水が風呂用の湯水循環路１０ａに徐々に供給され、この循環湯路１０ａが徐々に加圧されていくとともに、高温暖房側の湯水通流管５０ａも、低温暖房側の湯水通流管５０ｂも連絡管６９を介して徐々に加圧されていく。水圧センサ１７が設定試験圧（２ｋｇｆ／ｃｍ²以上〜３ｋｇｆ／ｃｍ²以下）を検出すると、給水制御手段７６が注湯電磁弁１５ａを閉じ状態にし、水道水供給が停止されて加圧が停止される。この加圧停止から設定時間（５分）が経過すると、給水制御手段７６が再度、注湯電磁弁１５ａを繰り返し開閉操作し、湯水循環路１０ａ、湯水通流管５０ａ，５０ｂの再加圧が行われる。すなわち、湯水循環路１０ａ、湯水通流管５０ａ，５０ｂが一回目の設定試験圧までの加圧で膨張することがあると、漏れがなくても圧力が低下することから、一回目の設定試験圧までの加圧から５分経過するまでに圧力低下が発生しても、それは漏れによるものではないと見なして気密検査が行われる。
そして、注湯電磁弁１５ａが３５回以上開き操作されても水圧センサ１７による検出圧力が１．５ｋｇｆ／ｃｍ²以上にならない場合には表示ランプ７０が点灯されるのであり、この表示ランプ７０が点灯すると、設定試験圧まで加圧できない多量の漏れがあると判断する。
水圧センサ１７よる検出圧が設定試験圧に達すると、この後、判定手段７７ａ，７７ｂ，７７ｃが水圧センサ１７よる検出圧に設定変化を越える変化がある否かを判定し、判定手段７７ａ，７７ｂ，７７ｃのいずれが変化有りと判定した場合にも、判定手段７７ａ，７７ｂ，７７ｃからの情報に基づいてエラー表示装置７１が自動的に表示作動するとともに試運転ランプ７４と水張りランプ７５が点滅作動するのであり、エラー表示装置７１が表示作動するとともに試運転ランプ７４及び水張りランプ７５が点滅すると、漏れがあると判断する。判定手段７７ａは、判定手段７７ｂよりも多量の漏れに起因する圧力変化を検出し、判定手段７７ｂは、判定手段７７ｃよりも多量の漏れに起因する圧力変化を検出する。判定手段７７ａが変化有りと判定した場合には、表示装置７１がエラー表示Ａを表示し、判定手段７７ｂが変化有りと判定した場合には、表示装置７１が前記エラー表示Ａとは表示内容が異なるエラー表示Ｂを表示し、判定手段７７ｃが変化有りと判定した場合には、表示装置７１が前記エラー表示ＡともＢとも表示内容が異なるエラー表示Ｃを表示するのであり、表示装置７１が表示するエラー表示がＡ，Ｂ，Ｃのいずれであるかを知ることにより、漏れの大きさを判断できる。
水圧センサ１７が一回目の設定試験圧を検出してから約２０分経過しても、かつ、判定手段７７ａ，７７ｂ，７７ｃのいずれも検出圧変化が有りの判定をしないと、試運転ランプ７４と手動水はりランプ７５が消灯されるのであり、水圧センサ１７が一回目の試験圧検出を行ってから約２０分（自動試運転スイッチ７２及び手動水張りスイッチ７３を操作してから約２５分）経過するのを待ち、試運転ランプ７４及び水はりランプ７５が消灯すると、風呂用の湯水循環経路１０ａにも暖房端末側の湯水通流管５０ａ，５１ａにも漏れがないと判断する。
【００２６】
漏れがあると判断した場合、暖房戻り路２４の継手５２を前記検査状態から熱媒通流状態に切り換えて暖房端末器側の湯水通流管５０ａと５０ｂには加圧されないようにした後、再度、自動試運転スイッチ７２と手動水張りスイッチ７３とを同時に入り操作して気密試験を実行させる指令を与え、風呂用の湯水循環路１０ａのみの気密試験を行う。この試験によって漏れがない試験結果を得ると、暖房端末器側の湯水通流管５０ａ，５０ｂに漏れがあると判断する。そして、この風呂用湯水循環路１０ａのみの気密試験によって漏れがある試験結果を得た場合、暖房端末器側の湯水通流管５０ａ，５０ｂのみの気密試験を行い、風呂用湯水循環路１０ａのみに漏れがあるのか、暖房端末器側の湯水通流管５０ａ，５０ｂの方にも漏れがあるのかどうかを判断する。
【００２７】
〔別実施形態〕
図８は、別の実施形態を備える給水制御手段７６の制御フローを示し、＃１〜＃４ステップに示すように、自動試運転スイッチ７２と手動水張りスイッチ７３とが同時に押し操作されると、試運転ランプ７４と水張りランプ７５とを点灯させる。これとともに、高温暖房端末器５０及び低温暖房端末器５１に備えられている端末熱動弁を開き操作して湯水通流管５０ａ，５１ａを開き状態にするとともに、注湯電磁弁１５ａの一回当たりの開き操作時間ｔを２０ｍｓｅｃに設定した状態で注湯電磁弁１５ａを繰り返し開閉操作し、風呂用の湯水循環路１０ａに徐々に水道水を供給して加圧するとともに高温暖房端末器側の湯水通流管５０ａと、低温暖房端末器側の湯水通流管５１ａとにそれぞれ連絡管６９を介して徐々に加圧する。＃５〜＃８ステップに示すように、注湯電磁弁１５ａを第１設定基準回数以上としての１５回以上開き操作しても、注湯電磁弁１５ａの開操作を開始してからの湯水循環路１０ａの圧力増加量が１ｋｇｆ／ｃｍ²以上に達していない検出状態に水圧センサー１７がなっていると、この場合には、注湯電磁弁１５ａの一回当たりの開き操作時間ｔを２０ｍｓｅｃから４０ｍｓｅｃに増加させて設定した状態で注湯電磁弁１５ａを繰り返し開閉操作する。＃９〜＃１１ステップに示すように、異常回数として設定してある３５回以上注湯電磁弁１５ａを開閉操作しても、注湯電磁弁１５ａの開操作を開始してからの湯水循環路１０ａの圧力増加量が１．５ｋｇｆ／ｃｍ²以上に達していない検出状態に水圧センサー１７がなっていると、この場合には、前記表示ランプ７０を点灯させて圧力上昇がない異常を表示する。＃１２ステップ以降は、図６及び図７に示す給水制御手段７６と同様に作動する。
【００２８】
注湯電磁弁１５ａを所定回数開き操作しても水圧センサ１７の検出圧力が設定圧力に達していなければ、注湯電磁弁１５ａの一回当たりの開き操作時間ｔを増大させる操作時間調整と、注湯電磁弁１５ａを所定回数開き操作しても湯水循環路１０ａの圧力増加量が設定増加量に達していなければ、注湯電磁弁１５ａの一回当たりの開き操作時間ｔを増大させる操作時間調整とのいずれか一方を採用する他、両方の操作時間調整を併せて行って加圧制御を行うように実施してもよい。
【００２９】
風呂給湯装置１０と暖房熱源機２０の両方を備える装置の他、風呂給湯装置１０と暖房熱源機２０のいずれか一方のみを備える装置の場合にも本発明は適用できる。したがって、風呂給湯装置１０、暖房熱源機２０を総称して熱源機と呼称し、浴槽１２、高温暖房端末器５０、低温暖房端末器５１を総称して端末器１２，５０，５１と呼称し、風呂給湯装置１０の湯水通路１８、暖房熱源機２０の高温暖房通路ＨＲ、低温暖房通路ＬＲを総称して湯水通路１８，ＨＲ，ＬＲと呼称し、浴槽側の湯水通流管１９、暖房端末器５０，５１の湯水通流管５０ａ，５１ａを総称して端末器側の湯水通流管１９，５０ａ，５１ａと呼称する。
熱源機２０のみを備える装置の場合、湯水通流管５０ａ，５１ａにこれの内部圧を検出する水圧センサを付設して気密試験を行う。
【００３０】
自動試運転スイッチ７２、手動水張りスイッチ７３に替え、気密試験の指令を出力する専用のスイッチなど、各種の指令手段を採用して実施してもよい。
【００３１】
試運転ランプ７４、水張りランプ７５、エラー表示装置７１のうちのいずれか一つのみを採用するか、いずれか二つを採用するかして実施してもよい。また、ブザーやベル、あるいは、音声発生装置を採用して実施してもよい。したがって、これらを総称して報知手段７４，７５，７１と呼称する。
【００３２】
熱交換器１１、２１がガスによって加熱される他に、電気や石油によって加熱される装置の場合にも、本発明は適用できる。
【図面の簡単な説明】
【図１】家庭用給湯装置の概略図
【図２】暖房往き路の継手の断面図
【図３】暖房戻り路の継手の断面図
【図４】連絡管接続状態の説明図
【図５】制御系のブロック図
【図６】給水制御のフロー図
【図７】給水制御のフロー図
【図８】別の実施形態を備える給水制御手段による給水制御のフロー図
【符号の説明】
１０ａ，２０ａ，２０ｂ湯水循環路
１１，２１加熱手段
１２，５０，５１端末器
１３ａ，５２ａ戻り口
１４ａ，５３ａ，５４ａ吐出口
１７水圧センサ
１８，ＨＲ，ＬＲ湯水通路
１９，５０ａ，５１ａ湯水通流管
７１，７４，７５報知手段
７６給水制御手段
７７ａ，７７ｂ，７７ｃ判定手段[0001]
BACKGROUND OF THE INVENTION
The present invention includes a hot water passage from a return port of hot water supplied to the terminal to a hot water discharge port via a heating means, and an open / close type water supply means for supplying water to the hot water passage from a tap water channel. It relates to a heat source machine.
[0002]
[Prior art]
When performing an airtight test of the hot water circulation path, such as when a system for supplying hot water by the heat source device is performed, conventionally, the inside of the hot water flow pipe is connected to the hot water circulation path by supplying compressed air. It was determined whether or not it was in a predetermined airtight state by detecting the presence or absence and magnitude of a pressure change after pressurizing up to the test pressure.
[0003]
[Problems to be solved by the invention]
Conventionally, when performing the above-described airtight test, it has been expensive to prepare and connect a compressor, which is expensive.
An object of the present invention is to provide a heat source machine in which the above-described airtight test can be advantageously performed both economically and labor-intensively.
[0004]
[Means for Solving the Problems]
In order to achieve the object, according to the first aspect of the present invention, in the heat source apparatus described at the beginning, when a command for connecting the terminal and executing the airtight test is output, the water supply control means operates the water supply means. The hot water circuit is fed from the tap water channel and pressurized with tap water pressure. At this time, if the water supply means is opened at once, the hot water circulation path is supplied and pressurized at once, so when the tap water pressure is high, the hot water circulation path becomes high, and the maximum pressure detectable by the water pressure sensor is compared. If the temperature is too low, it may easily occur that the detectable pressure is exceeded or abnormal distortion occurs in the piping and parts of the hot water circulation path. On the other hand, even when the tap water pressure is high, the water supply means is opened and closed repeatedly, and water is gradually supplied to the hot water circuit, and the hot water circuit is gradually pressurized to the set test pressure set as necessary for the airtight test. The hot water circulation path can be pressurized to the set test pressure with tap water while preventing the occurrence of a situation in which the pressure of the hot water circulation path exceeds the detectable range of the sensor or high pressure is applied to the piping.
As a result, not only when the tap water pressure is low, but also when the tap water pressure is high, the internal pressure of the hot water circulation path may become too high, exceeding the detectable range of the sensor, or causing abnormal distortion in the piping. The tap water pressure is used as a pressurizing means to pressurize the hot water circuit up to the set test pressure, and the hot water circuit can be hermetically tested at a lower cost than the conventional method using a compressor.
[0005]
Further, in claim 1 According to the described invention, after the water pressure sensor detects the set test pressure. First set elapsed time After the elapse of time, the water supply means is repeatedly opened and closed to supply water up to the set test pressure.
That is, for example, when the hot water circulation path is made of resin pipes, even if the pressure of the hot water circulation path reaches the set test pressure, the hot water circulation path subsequently expands and the pressure decreases, and is this pressure drop due to leakage? It may not be possible to judge. Even in this case, even if the pressure is further increased regardless of the decrease in the internal pressure, the hot water circulation path reaches a stable state in which the pressure decrease due to the expansion is unlikely to occur, and if there is a pressure decrease, it is determined that it is due to leakage. become able to. For this reason, after pressurizing to the set test pressure, it is set as the one that takes until the next expansion occurs First set elapsed time After the elapse of time, water supply is re-supplied to the set test pressure, and even if the hot water circulation path is prone to expansion due to pressurization, the pressure change can be detected after the stable state is reached. Is. As a result, what can be subjected to an airtight test at low cost by using tap water pressure can be obtained in a state where it can be accurately tested whether or not the hot water circulation path is likely to expand.
[0006]
Further, in claim 1 According to the described invention, the presence or absence of a pressure change in the hot water circulation path pressurized to the set test pressure is determined by the water pressure sensor and the determination unit, and the determination result is automatically notified by the notification unit, and the notification by the notification unit Since it is possible to know the result of the airtight test simply by knowing, it is possible to easily and surely determine whether or not a predetermined airtight state is obtained only by knowing the notification by the notification means.
[0007]
Claim 2 According to the invention described in the above, even if the water supply means is opened more than the set reference opening number of times and water is supplied, the pressure of the hot water circulation path does not reach the set pressure or the pressure increase amount of the hot water circulation path is increased. If the water pressure sensor is in the detection state that the amount has not been reached, the opening operation time of the water supply means is increased, and the setting test is performed by repeatedly opening and closing the water supply means with the previous opening operation time. Compared to the water supply up to the pressure, the increase in the pressure of the hot water circulation path due to the water supply means opening once and supplying the water increases, and the water is supplied so as to quickly increase the pressure to the set test pressure. is there. As a result, even when the tap water pressure is high, the airtight test can be efficiently performed by increasing the pressure to the set test pressure as quickly as possible in order to gradually increase the pressure so as not to apply a pressure higher than the set test pressure.
[0008]
Claim 3 According to the invention described in the above, the hot water circulation path is pressurized to the set test pressure while detecting the pressure of the hot water passage for the bath with the water pressure sensor, and is normally based on the pressure of the hot water passage for the bath detected by the water pressure sensor. This makes it possible to detect the water level in the bathtub and automatically supply the desired amount of hot water to the bathtub. It can be done at low cost.
[0009]
Claim 4 According to the invention described in the above, by connecting the hot water passage for bath to the hot water flow pipe on the heater side through the connecting pipe, the water pressure supplied to the hot water circulation path for the bath is supplied to the hot water flow path on the heating terminal side. Since this hot water flow pipe can also be gradually pressurized up to the set test pressure with tap water pressure, both hot and cold water passages for bath and heating can be used for tap water. An airtight test can be performed at low cost by using water pressure as a pressurizing means.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, a general hot water supply apparatus 1 including a finned tube type hot water supply heat exchanger 2, a bath hot water supply apparatus 10 including a finned tube type additional heat exchanger 11, and a finned tube type heating heat exchanger. The heating heat source machine 20 provided with 21, the hot water supply heat exchanger 2 and the reheating heat exchanger 11 are heated by the hot water supply gas burner 31, and the heating heat exchanger 21 is heated by the heating gas burner 32, A hot water supply device for general households is configured by the control device 40 that controls operation of 10, 20, and 30. This hot water supply device is a hot water supply for supplying hot water to a general hot water tap 3 such as a currant or a shower, a hot water supply for adding hot water to the bathtub 12 or in addition to the hot water in the bathtub 12, a floor heating device, a bathroom heating device, a dishwasher, The hot water supply circulates and supplies hot water as a heat medium to the high temperature heating terminal 50 such as a fan convector and the low temperature heating terminal 51, and is configured in detail as follows.
[0011]
The heating device 30 includes a hot water supply gas supply passage 33 connected to the hot water supply gas burner 31 and a heating gas supply passage 34 branched from the middle of the hot water supply gas supply passage 33 and connected to the heating gas burner 32. By connecting the gas inlet 33e of the supply path 33 to a household gas supply pipe, the gas from the gas supply pipe is supplied to the hot water supply gas burner 31 through the hot water supply gas supply path 33 and burned, so that the hot water supply heat exchanger. 2 and the additional heat exchanger 11 are heated, the gas from the gas supply pipe is supplied to the heating gas burner 32 through the heating gas supply path 34 and burned to heat the heating heat exchanger 21.
The hot water supply gas supply path 33 includes an original gas electromagnetic valve 33a, a hot water supply gas proportional valve 33b, a hot water supply gas electromagnetic valve 33c, and a gas switching electromagnetic valve 33d. The heating gas supply path 34 includes a heating gas electromagnetic valve 34e and A heating gas proportional valve 34f is provided.
[0012]
The general hot water supply apparatus 1 includes a water supply path 4 connected to the inlet side of the hot water supply heat exchanger 2 and a hot water supply path 5 connected to the outlet side of the hot water supply heat exchanger 2, and has a water inlet 4 f included in the water supply path 4. By connecting a discharge port 5g connected to a household water pipe and connecting a joint to the end of the hot water supply channel 5 to a plug-side hot water supply pipe 7 communicating with the hot water tap 3, Water is supplied to the hot water supply heat exchanger 2 through the water supply passage 4 and heated, and hot water after heating is supplied to the hot water tap 3 through the hot water supply passage 5.
The water supply path 4 includes a water filter 4 a, an accumulator 4 b, a water supply thermistor 4 c, a water amount sensor 4 d, and a water supply bypass path 4 e that supplies the water from the water pipe to the hot water supply path 5 by bypassing the hot water supply heat exchanger 2. is there. The hot water supply path 5 includes a hot water supply thermistor 5a, a mixing valve 5b for adjusting a mixing ratio of hot water from the hot water supply heat exchanger 2 and water from the water supply bypass 4e, a mixing thermistor 5c, a water proportional valve 5d, and an interrupting water amount sensor 5e. The overpressure preventing device 5f is provided. The hot water supply heat exchanger 2 is provided with a hot water afterfire safety device 8.
[0013]
The bath water heater 10 is connected to the inlet side of the heat exchanger 11 and has a bath pump 16 on the way, and a bath return path 13 having a return port 13a made of a joint at the end, and a heat exchanger. It is connected to the outlet side of the vessel 11 and has a bath passage 14 having a discharge port 14a made of a joint at the end, and passes from the return port 13a via the memory heat exchanger 11 as an example of heating means. A hot water passage 18 leading to the discharge port 14a is provided, and the middle of the bath return passage 13 in the hot water passage 18 is communicated with the middle of the hot water supply passage 5 and a note as an example of an open / close-type water supply means. A hot water passage 15 having a hot water electromagnetic valve 15a is provided.
That is, the return port 13a of the hot water passage 18 is connected to the bathtub return channel 12b of the hot water flow pipe 19 formed by the bathtub return channel 12b and the bathtub return channel 12c connected to the circulation adapter 12a of the bathtub 12. In addition to connecting, the discharge port 14a of the hot water passage 18 is connected to the bathtub-side forward passage 12c of the hot water flow pipe 19 to form a hot water circulation passage 10a for bath and linked to the control device 40. When the hot water filling switch is turned on, the hot water solenoid valve 15a is opened and hot water from the hot water supply passage 5 is supplied to the bath return passage 13 by the hot water filling passage 15 from the bath return passage 13. It flows into the bath going-out path 14 via the exchanger 11, flows into the bathtub-side going-out path 12c from the discharge port 14a, and flows into the bathtub 12 from the circulation adapter 12a. That is, the bath hot water supply apparatus 10 performs hot water filling of the bathtub 12 so that hot water from the hot water supply path 5 is supplied to the bathtub 12 via the memorial heating means 11 through the hot water filling path 15 and the hot water passage 18. When the memorial switch is turned on, the bath pump 16 is driven, and the bath pump 16 feeds the hot water in the bathtub 12 out of the circulation adapter 12a into the bath-side return path 12b and from the return port 13a. It flows into the return path 13, flows into this bath return path 14 from the bath return path 13 via the memorial heat exchanger 11, flows into the bathtub side outbound path 12 c from the discharge port 14 a, and flows from the circulation adapter 12 a to the bathtub 12. Flow into. That is, the bath water heater 10 circulates between the bathtub 12 and the remedy heat exchanger 11 so that hot water is taken out of the tub 12, heated by the remedy heat exchanger 11, and then returned to the tub 12. To do.
[0014]
When the hot water filling of the bathtub 12 is performed, the water pressure sensor 17 and the bathtub 12 provided in the bath return path 13 detect the water level of the bathtub 12 based on the internal pressure of the bath return path 13 in the hot water passage 18. Based on information from each of the hot water setting devices 41 provided in the control device 40, the control device 40 automatically operates the pouring electromagnetic valve 15a so as to set the amount of hot water to be supplied to a desired amount. That is, the operation is performed so that the pressure detected by the water pressure sensor 17 corresponds to the amount of hot water set by the hot water setter 41. As a result, a desired amount of hot water set by the hot water setting device 41 is supplied to the bathtub 12.
[0015]
The hot water passage 18 further includes a bath return thermistor 13b, a bath two-way valve 13c, an air replacement solenoid valve 13d, a water flow switch 13e, and a bath going thermistor 11a.
[0016]
The heating heat source machine 20 has a plurality of return ports 52a made of joints 52 at one end and a high temperature heating passage HR having a discharge port 53a made of joints 53 on the other end, and the plurality of return ports 52a. At one end, and a low-temperature heating passage LR having a discharge port 54a made of a joint 54 at the other end. The high temperature heating passage HR is connected to the inlet side of the heating heat exchanger 21 and has a heat medium passage 22 provided with a heat medium circulation pump 27 in the middle, and a makeup water tank connected to the heat medium passage 22 on the outlet side. 23, a heating return path 24 connected to the incoming water side of the makeup water tank 23 and having the joint 52 at the end, and connected to the outlet side of the heating heat exchanger 21 and connected to the joint at the end. And a high-temperature heating outbound path 25 having 53. When the heat medium pump 27 is driven, hot water flows into the heating heat exchanger 21 from the return port 52a through the heating return path 24, the makeup water tank 23, and the heat medium path 22 by the feeding action of the pump 27, By flowing out from the heating heat exchanger 21 to the high temperature heating outbound path 25 and reaching the discharge port 53a, the hot water from the return port 52a is discharged from the discharge port 53a through the heating heat exchanger 21 in the high temperature heating passage HR. As a result, the passage extends from the return port 52a via the heating heat exchanger 21 to the discharge port 53a.
The low temperature heating passage LR communicates between the heat medium passage 22, the makeup water tank 23, the heating return passage 24, the heat medium circulation pump 27 of the heat medium passage 22, and the heating heat exchanger 21. And a low-temperature heating outgoing path 26 having the joint 54 at the end. When the heat medium circulation pump 27 is driven, the feeding action of the pump 27, the heating high temperature thermistor 25a provided near the heating heat exchanger 21 of the high temperature heating outgoing path 25, and the low temperature heating outgoing path 26 are provided. By controlling the hot water temperature based on the detection results of the heating return low temperature thermistor 26a provided near the heating medium passage 22 and the heating return thermistor 24a provided in the heating return passage 24, the tank from the water supply passage 4 is used. The tap water supplied to the make-up water tank 23 through the water supply path 28 flows into the heat medium passage 22, and the hot water heated by the heating heat exchanger 21 is supplied to the high temperature heating outbound path 25 to be the high temperature heating terminal 50. The hot water returning from the high temperature terminal 50 and the hot water returning from the low temperature terminal 51 are returned to the make-up water tank 23 by the heat medium passage 22, and the heat medium passage is supplied from the tank 23. Or fed to a low temperature heating feed flow 26 flows into the 2, or is supplied to the heating heat exchanger 21. Thereby, the low temperature heating passage LR is connected to the discharge port 54a from the return port 52a via the heating heat exchanger 21 so that the hot water from the return port 52a goes out of the discharge port 54a through the heating heat exchanger 21. It is a passage leading to.
[0017]
That is, one of the return ports 52a of the high temperature heating passage HR is connected to the discharge side of the hot water flow pipe 50a provided in the high temperature heating terminal 50 so as to pass hot water through the heat exchange section thereof. Then, the discharge port 53a of the high temperature heating passage HR is connected to the incoming side of the hot water flow pipe 50a to form a hot water circulation path 20a for high temperature heating. One of the return ports 52a of the low temperature heating passage LR is connected to the discharge side of the hot water flow pipe 51a provided in the low temperature heating terminal 51 so as to pass hot water through the heat exchanging portion thereof. The discharge port 54a of the heating passage LR is connected to the incoming side of the hot water flow pipe 51a to form the hot water circulation path 20b on the low temperature heating side. Then, when the heating operation switch of the control device 40 is turned on, the heat medium circulation pump 27 is driven, and due to the feeding action of the pump 27, the high-temperature heating passage HR becomes hot water in the hot water flow pipe 50a of the high-temperature heating terminal 50. Is taken in from the return port 52a, heated through the heating heat exchanger 21, and then sent from the discharge port 53a to the hot water flow pipe 50a of the high temperature heating terminal 50, so that the low temperature heating passage LR is connected to the low temperature heating terminal 51. Hot water from the hot water flow pipe 51a is taken in from the return port 52a, and sent from the discharge port 54a to the hot water flow pipe 51a in the low temperature heating terminal 51 via the heating heat exchanger 21. Thereby, the heating heat source unit 20 takes out hot water from the high temperature heating terminal 50 and the low temperature heating terminal 51, heats it with the heating heat exchanger 21, and then returns it to the high temperature heating terminal 50 and the low temperature heating terminal 51. Circulation is performed between the high temperature heating terminal 50 and the low temperature heating terminal 51 and the heating heat exchanger 21.
The tank water supply path 28 is provided with a makeup water valve 28a and a makeup water electromagnetic valve 28b.
[0018]
Each of the joint 53 connected to the high temperature heating outbound path 25 and the joint 54 coupled to the low temperature heating outbound path 26 is configured as shown in FIG.
That is, the joint main bodies 53c, 54c are provided with heat source unit side connection portions 53b, 54b communicating with the heating outbound passages 25, 26 at one end, and a cylindrical body 55 provided with the discharge ports 53a, 54a is connected to an intermediate portion. Is provided with a switching valve 56. As shown in FIG. 2 (a), the support shaft 57 is connected to the joint by an operating handle 58 that is rotatably connected to the end of the support shaft 57 of the switching valve 56 protruding from the joint body 53c, 54c. The main body 53c, 54c is slid to the opposite side to the heat source unit side connection portions 53b, 54b, and the operation handle 58 is hooked and supported by a pair of stoppers 59 extending from the joint main bodies 53c, 54c. When the support shaft 57 is prevented from being pulled back into the joint bodies 53c and 54c by the spring 60 acting on the switching valve 56, the switching valve 56 is received and supported by the support portions 53d and 54d located inside the joint bodies 53c and 54c. The hot water / water flow position is established, and the internal passages of the joint bodies 53c and 54c and the front of the joints 53c and 54c are connected to communicate the heat source unit side connection portions 53b and 54b with the discharge ports 53a and 54a. It opens the communication passage 61 formed in the inner passage of the cylindrical body 55. As a result, the joints 53 and 54 communicate the heat source unit side connection portions 53b and 54b with the discharge ports 53a and 54a and allow hot water from the heating forward passages 25 and 26 to exit from the discharge ports 53a and 54a. So that hot water flows.
As shown in FIG. 2 (b), the operating handle 58 is rotated with respect to the support shaft 57 to be removed from the stopper 59, and the support shaft 57 is connected to the joint main bodies 53c and 54c by the spring 60 on the heat source side. When the sliding operation is performed toward 53 b and 54 b, the switching valve 56 is in the inspection position pressed against the valve seat member 62 by the spring 60, and the communication path 61 is blocked. As a result, the joints 53 and 54 disconnect the communication between the heat source unit side connection portions 53b and 54b and the discharge ports 53a and 54a, and the hot water from the hot water flow pipes 50a and 51a of the heating terminals 50 and 51 is heated. The test state is set so as to make it impossible to flow backward to the 25 and 26 sides.
[0019]
The joint 52 connected to the heating return path 24 is configured as shown in FIG.
That is, the heat source unit side connection part 52b communicating with the heating return path 24 is provided at one end side, and the cylinder body 63 provided with the plurality of return ports 52a, 52a is switched to the inside of the joint body 52c connected to the intermediate part. A valve 56 is provided, and an inspection connecting portion 65 having a plug member 64 detachably attached to the other end of the joint body 52c. As shown in FIG. 3 (a), the support shaft 57 is connected to the joint main body 52c by an operation handle 58 that is rotatably connected to the end of the support shaft 57 of the switching valve 56 protruding from the joint main body 52c to the outside. The spring 60 acting on the switching valve 56 is slid to the opposite side to the heat source unit side connection portion 52b and the operation handle 58 is hooked and supported by a pair of stoppers 59 extending from the joint body 52c. If the support shaft 57 is prevented from being pulled back into the joint main body 52c by the above, the switching valve 56 is in the hot water flowing position where it is received and supported by the support portion 52d located inside the joint main body 52c. In order to allow 52b and the plurality of return openings 52a and 52a to communicate with each other, a communication path 66 formed by an internal path of the joint body 52c and an internal path of the cylindrical body 63 is opened. To block the communication passage 67 that communicates the test connection portion 65. As a result, the joint 52 allows the hot water returning from the hot water flow pipes 50a, 51a of the heating terminals 50, 51 to the return port 52a by heating the heat source unit side connection portion 52b and the plurality of return ports 52a, 52a to return to the heating. A hot and cold water flowing state is established so as to allow the flow into the passage 24. As shown in FIG. 3B, the operation handle 58 is rotated with respect to the support shaft 57 to remove it from the stopper 59, and the support shaft 57 is connected to the joint main body 52c by the spring 60 with respect to the joint body 52c. When the switch valve 56 is slid in the opposite direction, the switching valve 56 is in the inspection position pressed against the valve seat member 62 by the spring 60, shuts off the communication path 66 and opens the communication path 67. As a result, the joint 52 disconnects the heat source unit side connection portion 52b from the plurality of return ports 52a, 52a and connects the inspection connection unit 65 to the plurality of return ports 52a, 52a. The tap water flows into the hot water flow pipe 50a of the high temperature heating terminal 50 and the hot water flow pipe 51a of the low temperature heating terminal 51 from the return port 52a while making it impossible for the tap water to flow out to the makeup water tank 23. Inspected state to allow.
[0020]
As shown in FIG. 3 (b), the inspection connecting portion 65 of the joint 52 is formed by removing the stopper member 64 and the clip-type stopper holder 68 made of a spring plate for preventing the stopper member 64 from coming off. Can be opened. By connecting the connecting pipe 69 to the opened inspection connection portion 65, the inspection connection portion 65 is provided in the drainage portion 14b provided in the joint forming the discharge port 14a of the bath outlet passage 14 in the hot water passage 18 of the bath water heater 10. Are communicated by the connecting pipe 69. That is, the tap water supplied from the water supply path 4 to the bath circulation path 10a is connected to the hot water flow pipe 50a of the high temperature heating terminal 50 through the joint 52 from the water draining portion 14b of the bath going path 14, and the low temperature heating terminal. The hot water passage 18 for the bath is connected to the hot water / water flow pipe 51a of the high temperature heating terminal 50 and the hot water / water flow pipe 50a of the low temperature heating terminal 51 through the connecting pipe 69. 51a.
[0021]
As shown in FIG. 5, the control device 40 is constituted by a microcomputer, and the display is composed of LEDs for displaying the results of the airtight test of the hot water circulation path 10a for bath and the hot water circulation paths 20a and 20b for heating. An error display device 71 for displaying the lamp 70 and its test result using liquid crystal means is linked to the control device 40. The automatic test operation switch 72 linked to the control device 40 so as to output a trial operation command and perform the trial operation control of the hot water supply device, and the control device 40 so as to output the water filling command and perform the water filling control of the bathtub 12. When the manual water filling switch 73 linked to the button is simultaneously pressed, the control device 40 automatically operates based on the information from the water pressure sensor 17 and the control flow shown in FIGS. It is.
[0022]
That is, as shown in steps # 1 to # 4, when the automatic test run switch 72 and the manual water filling switch 73 are pressed simultaneously, the test run lamp 74 and the water filling lamp 75 are turned on. At the same time, the terminal thermal valves provided in the high temperature heating terminal 50 and the low temperature heating terminal 51 are operated to open the hot water flow pipes 50a and 51a, and one time of the pouring electromagnetic valve 15a. The hot water solenoid valve 15a is repeatedly opened and closed in a state where the opening operation time t is set to 20 msec, and water is gradually supplied to the hot water circulation path 10a for pressurization, and the communication pipe 69 is connected to the hot water circulation path 10a. The hot water flow pipe 50a in the hot water circulation path 20a on the high temperature heating side and the hot water flow pipe 51a in the hot water circulation path 20b on the low temperature heating side are gradually supplied and pressurized through the air. At this time, every time when the pouring solenoid valve 15a is opened, it is checked what level the pressure detected by the water pressure sensor 17 is. As shown in steps # 5 to # 8, even if the pouring solenoid valve 15a is opened more than 15 times as the first set reference number or more, the water pressure sensor 17 is 1 kgf / cm. ² If the above pressure is not detected, the pouring electromagnetic valve 15a is repeatedly opened and closed with the opening operation time t per time of the pouring electromagnetic valve 15a set to 40 msec. Each time the hot water solenoid valve 15a is opened, the pressure detected by the water pressure sensor 17 is checked to determine the magnitude, and as shown in steps # 9 to # 11, 35 is set as the number of abnormal times. Even if the pouring electromagnetic valve 15a is opened and closed more than once, the water pressure sensor 17 is 1.5 kgf / cm. ² When the above internal pressure is not detected, the display lamp 70 is turned on to display an abnormality indicating no pressure increase. As shown in steps # 12 and # 13, 2 kgf / cm, in which the pressure detected by the water pressure sensor 17 is set as the inspection pressure. ² ~ 3kgf / cm ² When the pressure in the following range is not reached and the number of times of operation of the pouring electromagnetic valve 15a has not reached 35, the process returns to step # 4, and water is supplied again to pressurize. As shown in steps # 12 to # 15, 2 kgf / cm, in which the pressure detected by the water pressure sensor 17 is set as the pressure required for the airtightness inspection. ² ~ 3kgf / cm ² When the pressure falls within the following range, the number of opening operations of the pouring solenoid valve 17 that has been measured so far is reset to zero, and the pressure detected by the water pressure sensor 17 at this time is stored as the first initial pressure P0 and the timer Start. Thereafter, as shown in steps # 15 to # 22, the hot water flow pipes 19, 50a, 51a are made of resin, and when the set test pressure is applied, the pressure is applied until the expansion occurs. The detected pressure P by the water pressure sensor 17 is 0.6 kgf / cm from the first initial pressure P0 until 5 minutes set as the first set elapsed time applied to the time elapses from the previous timer start. ² When the pressure becomes lower than this, it is determined that there is a leak, and the determination result is displayed on the error display device 71 as an error A, and both the test run lamp 74 and the water filling lamp 75 are blinked to cause the leak. In addition, the terminal thermal operation valve of the high temperature heating terminal 50 and the low temperature heating terminal 51 is switched to close and the result is stored.
As shown in steps # 16, # 17, and # 23, when 5 minutes have passed as the first set elapsed time since the previous timer start, the detected pressure P detected by the water pressure sensor 17 is lower than the initial pressure P0. However, even if it has not decreased, the process returns to step # 4. That is, when the hot water flow pipes 19, 50a and 51a are made of resin, the set test pressure is applied to expand and the internal pressure is lower than the set test pressure, so that water is supplied again and the set test pressure is increased. . In step # 16 after re-pressurization, the criterion is P0−P <0.6 kgf / cm after the first pressurization. ² To P0-P <0.3kgf / cm ² Change to and judge. That is, the detected pressure P by the water pressure sensor 17 from the start of the timer to the elapse of the first set elapsed time is 0.3 kgf / cm from the initial pressure P0. ² It is determined whether or not the pressure is low.
As shown in steps # 24 and # 25, after repressurization, when the hot water flow pipes 19, 50a, 51a are made of resin, the gradient of pressure change due to expansion after repressurization is completed. When 8 minutes set as the second set elapsed time required for stabilization has elapsed since the timer start in step # 15, the pressure detected by the water pressure sensor 17 at this time is stored as the second initial pressure P1. Restart the timer. Thereafter, as shown in steps # 26 to # 29, the detected pressure P detected by the water pressure sensor 17 from the start of the timer in step # 25 until the elapse of 5 minutes set as the third set elapsed time has passed. 2 0.08kgf / cm from initial pressure P1 ² If the pressure becomes lower than this, it is determined that there is a leak, and the determination result is displayed on the error display device 71 as an error B, and the process proceeds to step # 20, and both the test run lamp 74 and the water filling lamp 75 are displayed. Is flashed and notified, and the terminal thermal valve of the high temperature heating terminal 50 and the low temperature heating terminal 51 is switched to close and the result is stored.
As shown in # 30 to # 35, the detected pressure P by the water pressure sensor 17 when the third set elapsed time has elapsed from the timer start in the step # 25 is 0.03 kgf / second from the second initial pressure P1. cm ² Further, the detected pressure P by the water pressure sensor 17 when 20 minutes as the fourth set elapsed time has elapsed from the start of the timer in the step # 15 is 0.15 kgf / second from the first initial pressure P0. cm ² The lower pressure and 0.08 kgf / cm than the second initial pressure P1. ² If the pressure is lower than the above, it is determined that there is a leak, and the determination result is displayed on the error display device 71 as an error C, and the process proceeds to step # 20, and both the test run lamp 74 and the water filling lamp 75 are turned on. It blinks to notify that there is a leak, and further, the terminal thermal valve of the high temperature heating terminal 50 and the low temperature heating terminal 51 is switched to close and the result is stored.
As shown in steps # 30 to # 33 and # 36 to # 39, the detected pressure P by the water pressure sensor 17 when the third set elapsed time has elapsed since the timer start in the step # 25 is the second pressure. Even if the pressure is lower than the initial pressure P1, the pressure of the reduced pressure is 0.03 kgf / cm. ² If it is smaller, or when 5 minutes as the third set elapsed time has elapsed since the timer start in step # 25, the detected pressure P by the water pressure sensor 17 is 0.03 kgf / cm from the second initial pressure P1. ² Even if the pressure is lower than this, is the detected pressure P detected by the water pressure sensor 17 at the time when 20 minutes as the fourth set elapsed time have elapsed from the start of the timer in the step # 15 not decreased from the first initial pressure P0? Even if it is lowered, the pressure of the lowered portion is 0.15 kgf / cm ² If it is smaller, or when 5 minutes as the third set elapsed time has elapsed since the timer start in step # 25, the detected pressure P by the water pressure sensor 17 is 0.03 kgf / cm from the second initial pressure P1. ² The pressure P detected by the water pressure sensor 17 when the pressure is lower than the above and 20 minutes as the fourth set elapsed time has elapsed from the start of the timer in step # 15 is 0.15 kgf / second from the first initial pressure P0. cm ² Whether the detected pressure P by the water pressure sensor 17 is lower than the second initial pressure P1 when 20 minutes as the fourth set elapsed time has elapsed since the timer start in step # 15, even if the pressure is lower than the above. Even if it is lowered, the pressure of the lowered portion is 0.08 kgf / cm ² In each of the cases where it is smaller, it is determined that there is no leakage, and the terminal thermal valve of the high temperature heating terminal 50 and the low temperature heating terminal 51 is switched to close and the result is stored. 74 and the water filling lamp 75 are turned off to notify that there is no leakage.
[0023]
Thus, the # 4 to # 10 steps, # 12 to # 17 steps, and # 23 steps constitute the water supply control means 76 for performing an airtight test on the circulating hot water passages 10a, 20a, and 20b. As the automatic test run switch 72 and the manual water filling switch 73 are operated to output a command to execute an airtight test, the water pressure sensor 17 detects the set test pressure by repeatedly opening and closing the pouring electromagnetic valve 15a. The hot water circulation path 10a of the bath water heater 10 and the hot water circulation paths 50a and 51a of the hot water circulation paths 20a and 20b are gradually supplied to the hot water circulation path 10a for the bath and the heating terminal. The hot and cold water flow pipes 50a and 51a are gradually pressurized to the set test pressure. And when performing this pressurization, even if the pouring electromagnetic valve 15a is opened for 15 times or more as the first set reference number or more, the water pressure sensor 17 is 1 kgf / cm. ² If the above is not detected, the opening operation time t per time of the pouring electromagnetic valve 15a is increased from 20 msec to 40 msec to pressurize while promoting the pressure rise, and the water pressure sensor 17 is set. After 5 minutes have passed as the first set elapsed time after detecting the test pressure, the hot water solenoid valve 15a is opened and closed again to supply water until the water pressure sensor 17 detects the set test pressure, and hot water circulation is performed. Even if the passage 10a and the hot and cold water flow pipes 50a and 51a expand, the pressure is increased to the set test pressure.
[0024]
Steps # 15 to # 18, steps # 25 to # 28, and steps # 25 to # 32 and # 34 constitute judgment means 77a, 77b and 77c, respectively, and this judgment means 77a, 77b and 77c. Determines whether or not the detected pressure after the set test pressure of the water pressure sensor 17 has decreased more than the set pressure, and the error display device 71, the test operation lamp 74, and the water filling lamp 75 are displayed as the determination results. To operate automatically.
[0025]
That is, after connecting the bathtub 12 and the heating terminals 50 and 51 to form the hot water circulation paths 10a, 50a and 51a, the hot water circulation path 10a for the bath and the hot water flow pipes 50a and 51a on the heating terminal side are provided. The airtight inspection can be performed as follows.
That is, as shown in FIGS. 1 and 4, a stopper member 80 with a safety valve for closing the hot water supply / discharge port is attached to the circulation adapter 12 a of the bathtub 12, and the inspection connecting portion 65 of the joint 52 provided in the heating return path 24 is provided. The communication pipe 69 is connected to and communicated with the water draining portion 14b of the bathway 14. Note that the joints 52, 53, 54 of the heating return path 24, the high temperature heating outbound path 25, and the low temperature heating outbound path 26 are switched to the heat medium flow state, the safety valve of the plug member 80 is opened, and The hot water solenoid valve 15a is opened, water is supplied from the hot water supply passage 15 to the hot water circulation passage 10a for the bath, and from the hot water circulation passage 10a to the connecting pipe 69, so that the hot water circulation passage 10a and the connecting pipe 69 are filled with water. Vent the air. Next, the safety valve of the plug member 80 is switched to close, the tank water supply passage 28 is opened and the heat medium circulation pump 27 is driven, and water is supplied to each of the hot water circulation passage 20a on the high temperature side and the hot water circulation passage 20b on the low temperature side. When the set time elapses after the lower limit sensor 23a of the make-up water tank 23 is in the detection state, the water supply is stopped, the hot water circulation paths 20a and 20b are filled with water and the air is vented. That is, the internal air is caused to flow out from the makeup water tank 23. When this air venting is completed, the joints 53, 54, 52 of the high temperature heating outbound path 25, the low temperature heating outbound path 26, and the heating return path 24 are switched to the inspection state, and then the automatic test run switch 72 and the manual water filling switch 73 are set. At the same time, give a command to enter and operate the airtight test.
Then, the water supply control means 76 is actuated to open and close the pouring electromagnetic valve 15a repeatedly. At this time, the opening / closing operation is started with a single opening operation time of 20 msec for the pouring solenoid valve 15a, and the detected pressure by the water pressure sensor 17 is 1 kgf / cm even if the opening operation is performed 15 times or more. ² When it does not become above, the opening operation time of the pouring electromagnetic valve 15a is increased to 40 msec and the opening / closing operation is repeated. Thereby, the tap water from the water supply path 4 is gradually supplied to the hot water circulation path 10a for the bath, the circulation hot water path 10a is gradually pressurized, and the hot water flow pipe 50a on the high temperature heating side is also The hot and cold water flow pipe 50 b on the low temperature heating side is also gradually pressurized through the connecting pipe 69. The water pressure sensor 17 sets the set test pressure (2 kgf / cm ² ~ 3kgf / cm ² When the following is detected, the water supply control means 76 closes the pouring electromagnetic valve 15a, the tap water supply is stopped, and the pressurization is stopped. When a set time (5 minutes) elapses from the pressurization stop, the water supply control means 76 repeatedly opens and closes the pouring electromagnetic valve 15a, and the hot water circulation path 10a and the hot water flow pipes 50a and 50b are repressurized. Done. That is, if the hot water circulation path 10a and the hot water flow pipes 50a and 50b are expanded by pressurization up to the first set test pressure, the pressure will drop even if there is no leakage. Even if a pressure drop occurs within 5 minutes from the pressurization up to the pressure, it is considered that it is not caused by a leak, and an airtight inspection is performed.
And even if the pouring solenoid valve 15a is opened 35 times or more, the pressure detected by the water pressure sensor 17 is 1.5 kgf / cm. ² If not, the display lamp 70 is turned on. When the display lamp 70 is turned on, it is determined that there is a large amount of leakage that cannot be increased to the set test pressure.
When the detection pressure by the water pressure sensor 17 reaches the set test pressure, the determination means 77a, 77b, 77c thereafter determines whether the detection pressure by the water pressure sensor 17 has changed beyond the set change, and the determination means 77a, 77b. , 77c, the error display device 71 is automatically activated based on the information from the determination means 77a, 77b, 77c, and the test run lamp 74 and the water filling lamp 75 are blinked. Thus, when the error display device 71 performs the display operation and the test run lamp 74 and the water filling lamp 75 blink, it is determined that there is a leak. The determination unit 77a detects a pressure change caused by a larger amount of leakage than the determination unit 77b, and the determination unit 77b detects a pressure change caused by a larger amount of leakage than the determination unit 77c. When the determination unit 77a determines that there is a change, the display device 71 displays an error display A, and when the determination unit 77b determines that there is a change, the display device 71 indicates that the display content is the error display A. When a different error display B is displayed and the determination means 77c determines that there is a change, the display device 71 displays an error display C having different display contents for both the error display A and B, and the display device 71 displays the error display B. By knowing which of the error indications A, B, or C is to be performed, the magnitude of the leak can be determined.
If about 20 minutes have elapsed after the water pressure sensor 17 detects the first set test pressure, and if any of the determination means 77a, 77b, 77c does not determine that the detected pressure has changed, The manual water beam lamp 75 is turned off, and about 20 minutes have passed since the water pressure sensor 17 detected the first test pressure (about 25 minutes after the automatic test run switch 72 and the manual water filling switch 73 were operated). When the test run lamp 74 and the water beam lamp 75 are turned off, it is determined that neither the hot water circulation path 10a for bath nor the hot water flow pipes 50a, 51a on the heating terminal side are leaked.
[0026]
If it is determined that there is a leak, after switching the joint 52 of the heating return path 24 from the inspection state to the heat medium flow state so that the hot water flow pipes 50a and 50b on the heating terminal side are not pressurized, The automatic test operation switch 72 and the manual water filling switch 73 are simultaneously turned on and operated again to give a command to execute the airtight test, and the airtight test of only the hot water circulation path 10a for the bath is performed. When a test result with no leak is obtained by this test, it is determined that there is a leak in the hot water flow pipes 50a and 50b on the heating terminal side. And when the test result which has a leak is obtained by the airtight test of only the hot water circulation path 10a for the bath, the airtight test of only the hot water flow pipes 50a and 50b on the heating terminal side is performed, and only the hot water circulation path 10a for the bath It is determined whether there is a leak in the hot water supply pipes 50a, 50b on the heating terminal side.
[0027]
[Another embodiment]
FIG. 8 shows a control flow of the water supply control means 76 having another embodiment, and when the automatic test run switch 72 and the manual water filling switch 73 are pushed simultaneously as shown in steps # 1 to # 4, the test run is performed. The lamp 74 and the water filling lamp 75 are turned on. At the same time, the terminal thermal valves provided in the high temperature heating terminal 50 and the low temperature heating terminal 51 are operated to open the hot water flow pipes 50a and 51a, and one time of the pouring electromagnetic valve 15a. The hot water solenoid valve 15a is repeatedly opened and closed in a state where the opening operation time t is set to 20 msec, and tap water is gradually supplied to the hot water circulation passage 10a for pressurization and pressurized, and hot water on the high temperature heating terminal side. Pressure is gradually applied to the flow pipe 50a and the hot water flow pipe 51a on the low temperature heating terminal side through the connection pipe 69. As shown in steps # 5 to # 8, the hot water circulation after the pouring electromagnetic valve 15a is opened even if the pouring electromagnetic valve 15a is opened more than 15 times as the first set reference number or more. The pressure increase of the passage 10a is 1 kgf / cm ² If the water pressure sensor 17 is in a detection state that does not reach the above, in this case, the pouring operation is performed in a state where the opening operation time t per time of the pouring electromagnetic valve 15a is increased from 20 msec to 40 msec. The electromagnetic valve 15a is repeatedly opened and closed. As shown in steps # 9 to # 11, the hot water circulation path after the opening operation of the pouring electromagnetic valve 15a is started even if the pouring electromagnetic valve 15a is opened and closed 35 times or more set as the number of abnormalities. 10a pressure increase is 1.5kgf / cm ² If the water pressure sensor 17 is in a detection state that does not reach the above, in this case, the display lamp 70 is turned on to display an abnormality in which there is no pressure increase. After the step # 12, the operation is the same as the water supply control means 76 shown in FIGS.
[0028]
If the detection pressure of the water pressure sensor 17 does not reach the set pressure even if the pouring electromagnetic valve 15a is opened a predetermined number of times, an operation time adjustment for increasing the opening operation time t per time of the pouring electromagnetic valve 15a, If the amount of pressure increase in the hot water circulation path 10a does not reach the set increase amount even if the pouring solenoid valve 15a is opened a predetermined number of times, the operation time for increasing the opening operation time t per time of the pouring solenoid valve 15a. In addition to adopting one of the adjustments, both of the operation time adjustments may be performed together to perform pressurization control.
[0029]
The present invention can be applied to a device provided with only one of the bath hot water supply device 10 and the heating heat source machine 20 as well as a device provided with both the bath hot water supply apparatus 10 and the heating heat source machine 20. Therefore, the bath water heater 10 and the heating heat source device 20 are collectively referred to as a heat source device, and the bathtub 12, the high temperature heating terminal device 50, and the low temperature heating terminal device 51 are collectively referred to as terminal devices 12, 50, 51, The hot water passage 18 of the bath water heater 10, the high temperature heating passage HR and the low temperature heating passage LR of the heating heat source device 20 are collectively referred to as hot water passage 18, HR and LR. The hot and cold water flow pipes 50a and 51a of the 50 and 51 are collectively referred to as the hot water and water flow pipes 19, 50a and 51a on the terminal side.
In the case of an apparatus including only the heat source unit 20, a water pressure sensor for detecting the internal pressure of the hot water flow pipes 50a and 51a is attached to perform an airtight test.
[0030]
Instead of the automatic test run switch 72 and the manual water filling switch 73, various command means such as a dedicated switch for outputting an airtight test command may be employed.
[0031]
Only one of the test run lamp 74, the water filling lamp 75, and the error display device 71 may be employed, or any two of them may be employed. Further, a buzzer, a bell, or a sound generator may be employed. Therefore, these are collectively called notification means 74, 75, 71.
[0032]
The present invention can also be applied to a case where the heat exchangers 11 and 21 are heated by gas or by an apparatus heated by electricity or petroleum.
[Brief description of the drawings]
FIG. 1 is a schematic view of a domestic hot water supply device.
[Fig. 2] Cross-sectional view of the joint of the heating outbound path
FIG. 3 is a sectional view of a joint of a heating return path
FIG. 4 is an explanatory diagram of a connection pipe connection state.
FIG. 5 is a block diagram of the control system.
Fig. 6 Flow chart of water supply control
Fig. 7 Flow chart of water supply control
FIG. 8 is a flow chart of water supply control by water supply control means including another embodiment.
[Explanation of symbols]
10a, 20a, 20b Hot water circuit
11, 21 Heating means
12, 50, 51 Terminal
13a, 52a Return port
14a, 53a, 54a Discharge port
17 Water pressure sensor
18, HR, LR Hot water passage
19, 50a, 51a Hot water flow pipe
71, 74, 75 Notification means
76 Water supply control means
77a, 77b, 77c judging means

Claims

This is a heat source device comprising a hot water passage from a return port of hot water circulated to a terminal to a hot water discharge port via a heating means, and an open / close type water supply means for supplying water from the tap water channel to the hot water passage. And
A water pressure sensor for detecting a water pressure in the hot water circulation path is instructed to execute an airtight test in a state where a hot water circulation pipe is formed by connecting a hot water flow pipe on the terminal side to the hot water path. Bei example the water supply control means for opening and closing repeatedly said water supply means to the detection of the setting test pressure,
After the first set elapsed time has elapsed after the water pressure sensor detects the set test pressure, the water supply control means is again operated to repeatedly open and close the water supply means until the water pressure sensor detects the set test pressure. Configured to pressurize,
In addition to determining means for determining whether or not the detected pressure of the water pressure sensor after the water pressure sensor detects the set test pressure has a decrease change greater than or equal to the set pressure, a notification for informing the determination result by the determining means The means is provided in a state of automatically informing operation based on information from the determination means,
The determination means;
Whether or not the detected pressure of the water pressure sensor has decreased more than a set pressure during the period from when the water pressure sensor detects the set test pressure to when the first set elapsed time elapses, Whether the detected pressure of the water pressure sensor has decreased more than the set pressure between the time when the water pressure sensor detects the set test pressure and the elapse of the first set elapsed time, and the repressurization The detected pressure of the water pressure sensor is set after the elapse of a second set elapsed time from when the water pressure sensor detects the set test pressure until the gradient of pressure change due to expansion of the hot water flow pipe stabilizes. Configured to determine whether there is a decrease change over pressure, and
The set pressure during the first set elapsed time after the water pressure sensor detects the set test pressure due to the repressurization, and the first after the water pressure sensor detects the set test pressure. A heat source device configured to change from the set pressure until the set elapsed time elapses .

The water supply control means is configured to increase the time of one opening operation of the water supply means if the water pressure sensor is in a detection state other than the setting detection state even if the water supply means is opened more than a set reference opening number. heat source machine according to claim 1, wherein in Te.

The heat source apparatus according to claim 1 or 2, wherein the hot water passage is a bath hot water passage connected to a hot water flow pipe on the bathtub side, and the water pressure sensor is provided in the hot water passage for bath .

As the hot water passage, a hot water passage for bath connected to the hot water flow pipe on the bathtub side and a hot water passage for heating connected to the hot water flow pipe on the heating terminal side are provided, and the hot water passage for bath is connected to the heating terminal The heat source device according to any one of claims 1 to 3, further comprising a connecting pipe that communicates with the hot water flow pipe on the side .