JP3933324B2

JP3933324B2 - Fitting for heat source machine

Info

Publication number: JP3933324B2
Application number: JP27830398A
Authority: JP
Inventors: 新太郎己波; 正長西浦
Original assignee: Osaka Gas Co Ltd
Current assignee: Osaka Gas Co Ltd
Priority date: 1998-09-30
Filing date: 1998-09-30
Publication date: 2007-06-20
Anticipated expiration: 2018-09-30
Also published as: JP2000111065A

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熱媒の戻り口から熱媒加熱手段を経由して熱媒の吐出口に至る熱媒通路を備えた熱源機における前記戻り口又は前記吐出口に接続される熱源機用継手に関する。
【０００２】
【従来の技術】
上記熱源機用継手として、従来、図８および図９に示すように、一つの熱源機側接続部４２、複数個の端末側接続部４６、熱源機側接続部４２を各端末側接続部４６に対して連通接続させたり、遮断したりする一つの切替弁４４を備えるものがあった。
すなわち、たとえば一般家庭用の給湯装置において、図１０（イ）に示すように暖房熱源機における熱媒通路２２，２３の吐出口２２ａおよび戻り口２３ａをこの継手によって暖房用端末器３０の熱媒通流管３１に接続する。そして、給湯システムの施工が完了した場合など、吐出口側、戻り口側それぞれの継手における切替弁４４のネジ式操作部４４ａを回転操作して切替弁４４を図８に示す検査状態に切り換えることにより、熱源機側接続部４２を各端末側接続部４６に対して遮断させて熱源機側に圧力が漏れないように熱源機側の熱媒通路２２，２３と端末器側の熱媒通流管３１との連通を断ち、吐出口側と戻り口側のいずれか一方の継手４０における複数個の端末側接続部４６のうちの端末器側の熱媒通流管３１が接続していない端末側接続部４６に検査用流体の供給管６０を接続して端末器側の熱媒通流管３１に検査用流体を供給して加圧する。つまり、複数個の端末側接続部４６のうちの一つを検査用接続部として、端末器側の気密検査を行う。そして、通常時は、図９および図１０（イ）に示すように、吐出口側、戻り口側それぞれの継手４０，５０における切替弁４４を操作部４４ａの回転操作によって図９に示す熱媒通流状態に切り換えることにより、熱源機側接続部４２を各端末側接続部４６に連通接続させ、熱源機側と端末器側との間を熱媒が循環するように熱源機側の熱媒通路２２，２３と端末器側の熱媒通流管３１とを連通させるものである。
【０００３】
【発明が解決しようとする課題】
たとえば一般家庭用の給湯装置の場合、検査用流体としてエアーを採用すればコンプレッサーを準備する必要があることと、水道水ならば容易に得られるとともに熱媒に混入しても支障がないこととから、水道水を検査用流体として検査されることがある。
このように液体を検査用流体として採用した場合には、検査を終えて流体供給管を継手から外した際、端末器側の熱媒通流管に充満していた液体が継手から漏れ出る事態が発生する。たとえば継手がメータボックスに配置されている場合、流出水のためにメータが故障することがある。
本発明の目的は、検査用流体の流出を回避しながら検査できる熱源機用継手を提供することにある。
【０００４】
【課題を解決するための手段】
目的を達成するために、請求項１に記載の発明によれば、熱源機における熱媒の戻り口又は吐出口に接続する熱源機側接続部、端末器側の熱媒通流管が接続される端末側接続部、検査用流体の供給管が接続される検査用接続部、および、前記熱源機側接続部と前記端末側接続部とを連通接続するとともに前記検査用接続部が前記熱源機側接続部および前記端末側接続部に対して遮断される熱媒通流状態と、前記検査用接続部と前記端末側接続部とを連通接続するとともに前記検査用接続部および前記端末側接続部が前記熱源機側接続部に対して遮断される検査状態とに切換え操作自在な切替弁が備えられている。
すなわち、熱源機側接続部を熱源機における熱媒の戻り口又は吐出口に、端末側接続部を端末器側の熱媒通流管にそれぞれ接続することにより、熱源機側の熱媒通路と端末器側の熱媒通流管とを接続させるものである。そして、検査用接続部に検査用流体の供給管を接続するとともに切替弁を検査状態に切り換え操作すると、検査用接続部と端末側接続部とが連通接続されるとともに検査用接続部および端末側接続部が熱源機側接続部に対して遮断されることにより、供給管からの検査用流体を端末器の熱媒通流管に供給してこの熱媒通流管に加圧できる。この状態から切替弁を熱媒通流状態に切り換え操作すると、熱源機側接続部と端末側接続部とが連通接続されるとともに検査用接続部が熱源機側接続部および端末側接続部に対して遮断されることにより、熱源機側と端末器側との間を熱媒が循環するように熱源機側の熱媒通路と端末器側の熱媒通流管とを連通させることができ、かつ、端末器の熱媒通流管に充満している検査用流体が検査用接続部から流出しないようにしながら検査用流体の供給管を検査用接続部から取り外すことができる。
したがって、端末器の熱媒通流管に検査用流体を供給して端末器側の気密検査を行うことができるとともに、熱媒通流管に充満した検査用流体が後に検査用接続部から流出することを回避でき、たとえば給湯装置の場合には、水道水を検査用流体として採用し、コンプレッサーを不要にして安価かつ楽に、しかも、水流出によるメータ故障などのトラブル発生を回避しならがら検査できるなど有利に気密検査できる。
【０００５】
また、請求項１に記載の発明によれば、熱媒通流状態と検査状態とのうちの一方側に切替弁を復帰付勢するスプリングと、他方側に操作された切替弁を復帰付勢力に抗して保持する保持手段が設けられ、保持手段による保持を解除すれば、切替弁がスプリングのために熱媒通流状態と検査状態とのうちの一方側に自ずと復帰するものである。
したがって、保持手段による保持を解除する簡単な操作を行うだけで楽に切替弁を熱媒通流状態と検査状態の一方側に切り換えられる。また、切替弁がねじ式操作部の回動操作によって切り換え操作するものであれば、所定の熱媒通流状態又は検査状態まで十分に切り換えないで半開状態にされるなど切り換え不足が発生しやすくなるのに対し、スプリングによって所定の操作状態まで十分に切り換えられて、切り換え不足を発生しにくくしながら切り換え操作でき、熱媒通流状態または検査状態に迅速かつ楽にしかも精度よく切り換えられる。
【０００６】
また、請求項１に記載の発明によれば、切替弁がスプリングによって前記検査状態に復帰付勢され、切替弁を熱媒流通状態に保持手段によって保持させながら熱媒を熱源機側と端末器側との間で循環流動させるものである。すなわち、切替弁をスプリングの付勢力で熱媒流通状態に保持させながら熱媒を循環流動させるよう構成した場合、スプリングが劣化すれば切替弁が検査側にずれ動く事態が発生しやすくなるが、スプリングに劣化が発生しても切替弁を検査側にずれ動きにくように強固に保持させながら熱媒を循環流動させることを可能にするものである。したがって、熱媒が長期にわたって漏れ出にくいように信頼性の高いものになる。
【０００７】
また、請求項１に記載の発明によれば、切替弁が熱媒通流状態と検査状態とにスライドによって切り換わるように構成し、切替弁を熱媒通流状態と検査状態とに切り換え操作するべく切替弁に備えてある操作部と、この操作部に受け止め作用することによって切替弁を復帰付勢力に抗して保持するストッパーとによって前記保持手段を構成するとともに、操作部を回転操作によって前記ストッパーに係脱させるように構成し、操作部をスライド操作して切替弁を熱媒通流状態又は検査状態に切り換え、その操作部を回転操作してストッパーに受け止めさせることによって切替弁を熱媒通流状態又は検査状態に保持させるものである。したがって、操作部を回転させるとともにスライドさせる簡単な操作を行うだけで楽に切替弁を熱媒通流状態と検査状態とに切り換えられるように操作面で有利なものにできた。
【０００８】
【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を備える一般用給湯装置１と、フィンチューブ型の追焚熱交換器１１を備える風呂用給湯装置１０と、熱媒加熱手段の一例としてのフィンチューブ型の暖房熱交換器２１を備える暖房用熱源機２０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に湯水を供給し、浴槽１２に湯水を張るととも浴槽１２の湯水を追焚し、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暖房用端末器３０に熱媒としての湯水を循環供給するものであり、詳しくは次の如く構成してある。
【０００９】
一般用給湯装置１は、前記給湯熱交換器２、この給湯熱交換器２の入口側に接続している給水路４、給湯熱交換器２の出口側に接続している給湯路５、給湯熱交換器２を加熱する給湯ガスバーナ６によって構成してあり、給水路４を家庭用の水道管に接続し、給湯路５を前記給湯栓３に連通している栓側給湯管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。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。
【００１０】
風呂用給湯装置１０は、前記追焚熱交換器１１、この追焚熱交換器１１の入口側に接続している風呂戻り路１３、追焚熱交換器１１の出口側に接続している風呂往き路１４、前記風呂戻り路１３と前記給湯路５とを連通させている湯張り路１５、追焚熱交換器１１を加熱する前記給湯ガスバーナ６によって構成してあり、風呂戻り路１３が備えている継手１３ａによって風呂戻り路１３を浴槽１２の循環アダプター１２ａから延びる浴槽側戻り路１２ｂに接続するとともに、風呂往き路１４が備えている継手１４ａによって風呂往き路１４を前記アダプター１２ａから延びる浴槽側往き路１２ｃに接続することにより、浴槽１２に湯水を張ったり浴槽１２の湯水を追焚したりする。すなわち、給湯路５からの湯水を湯張り路１５によって風呂戻り路１３に供給して追焚熱交換器１１、風呂往き路１４および風呂側往き路１２ｂを通して浴槽１２に供給する。前記風呂戻り路１３が備えている追焚循環ポンプ１６を駆動すると、このポンプ１６の送り作用により、浴槽１２の湯水を追焚熱交換器１１と浴槽１２との間で循環させて追焚する。
【００１１】
風呂戻り路１３には、この風呂戻り路１３に作用する圧力に基づいて浴槽１２内の水位を検出する水位センサ１７、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を備えてある。追焚熱交換器１１には、風呂往きサーミスタ１１ａを備えてある。湯張り路１５には注湯電磁弁１５ａを備えてある。
【００１２】
暖房用熱源機２０は、前記暖房熱交換器２１、この暖房熱交換器２１の出口側に接続している高温暖房往き路２２および補給水タンクＴの入口側に接続している熱媒戻り路２３などで成る高温側の熱媒通路ＨＲ、前記補給水タンクＴの出口側と暖房熱交換器２１の入口側とを連通させている熱媒通路２４から分岐している低温暖房往き路２５および前記熱媒戻り路２３などで成る低温側の熱媒通路ＬＲ、暖房熱交換器２１を加熱する暖房ガスバーナ２６によって構成してあり、前記高温暖房往き路２２の一端側に備えてある高温側熱媒通路ＨＲの吐出口２２ａを、高温型暖房用端末器３０に接続している端末器側の熱媒通流管３１のうちの受入れ側管部３１ａに接続するとともに、前記熱媒戻り路２３の一端側に備えてある高温側熱媒通路ＨＲの戻り口２３ａを、前記熱媒通流管３１のうちの吐出側管部３１ｂに接続し、前記熱媒通路２４に備えてある熱媒循環ポンプ２７を駆動することにより、熱媒としての高温湯水を暖房用端末器３０に循環供給する。前記低温暖房往き路２５の一端側に備えてある低温側熱媒通路ＬＲの吐出口２５ａを低温型暖房用端末器（図示せず）に接続している熱媒通流管（図示せず）の受入れ側管部に接続するとともに、前記熱媒戻り路２３の一端側に備えてある低温側熱媒通路ＬＲの戻り口２３ａを前記熱媒通流管の吐出側管部に接続して前記熱媒循環ポンプ２７を駆動することにより、熱媒としての低温湯水を低温型暖房用端末器に循環供給する。高温側熱媒通路ＨＲと低温側熱媒通路ＬＲの戻り口２３ａも戻り路２３も共通になっている。
【００１３】
すなわち、前記熱媒循環ポンプ２７を駆動すると、このポンプ２７の送り作用と、前記高温暖房往き路２２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２２ｂ、前記低温暖房往き路２５の前記熱媒通路２４の近くに備えてある暖房往き低温サーミスタ２５ｂ、前記熱媒戻り路２３に備えてある暖房戻りサーミスタ２３ｂそれぞれの検出結果に基づく湯水流動の管理とにより、前記給水路４からタンク給水路２８を介して水道水が供給される前記補給水タンクＴの水が熱媒通路２４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２２に供給されて高温型端末器３０に供給され、高温型端末器３０から戻る湯水も低温型端末器から戻る湯水も熱媒戻り路２３によって補給水タンクＴに戻され、このタンクＴから熱媒通路２４に流入して低温熱媒往き路２５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、高温暖房往き路２２、熱媒戻り路２３、熱媒通路２４、補給水タンクＴが、戻り口２３ａから暖房熱交換器２１を経由して吐出口２２ａに至る前記高温側の熱媒通路ＨＲを形成し、この熱媒通路ＨＲにより、熱媒としての高温湯水を高温型の暖房端末器３０に循環供給する。そして、低温暖房往き路２５、熱媒戻り路２３、補給水タンクＴ、熱媒通路２４などが戻り口２３ａから暖房熱交換器２１を経由して吐出口２５ａに至る前記低温側の熱媒通路ＬＲを形成し、この熱媒通路ＬＲにより、熱媒としての低温湯水を低温型の暖房端末器に循環供給する。
【００１４】
前記タンク給水路２８には、補給水バルブ２８ａ、補給水電磁弁２８ｂを備えてある。補給水タンクＴには、水位の上限を検出する上限センサ２９ａ、水位の下限を検出する下限センサ２９ｂ、オーバフロー路２９ｃを備えてある。前記給湯ガスバーナ６および暖房ガスバーナ２６に燃焼ガスを供給するガス供給路３６には、元ガス電磁弁３６ａ、給湯ガス比例弁３６ｂ、給湯ガス電磁弁３６ｃ、ガス切替電磁弁３６ｄ、暖房ガス電磁弁３６ｅ、暖房ガス比例弁３６ｆを備えてある。
【００１５】
図１に示すように、前記熱媒通路ＨＲ，ＬＲには、高温暖房往き路２２を端末器３０における熱媒通流管３１に接続する往き側継手４０、低温側暖房往き路２５を端末器における熱媒通流管３１に接続する往き側継手４０、熱媒戻り路２３を高温型端末器３０および低温型端末器それぞれの熱媒通流管３１に接続する戻り側継手５０を備えてある。
【００１６】
図２に示すように、前記高温暖房側の往き側継手４０も、低温暖房側の往き側継手４０も、連結ねじ４１が付いている熱源機側接続部４２を一端側に備え、他端側に検査用接続部４３を備え、内部に耐熱性の合成樹脂で作製した切替弁４４を備えている継手本体４５と、端末側接続部４６を一端側に備えているとともに他端側が継手本体４５の連結筒部４５ａに内嵌して継手本体４５に連結している接続部形成体４７とによって構成してある。前記連結ねじ４１を前記高温暖房往き路２２の端部に締め付け連結することにより、前記熱源側接続部４２を高温側熱媒通路ＨＲの吐出口であるところの高温暖房往き路２２の吐出口２２ａに対して接続でき、前記端末側接続部４６は、前記熱媒通流管３１の受入れ側管部３１ａの端部に内嵌させることによって前記熱媒通流管３１に対して接続できるのであり、これらの接続操作を行うことにより、往き側継手４０が高温側熱媒通路ＨＲの高温暖房往き路２２と端末器側の熱媒通流管３１とを接続する状態になる。
【００１７】
前記検査用接続部４３は、図１に一点鎖線で示す如く前記風呂往き路１４が有する前記継手１４ａに備えられている水抜き部１４ｂに一端側を接続した供給管６０の他端側を接続したり、分離させたりするように構成してある。すなわち、供給管６０を接続することにより、検査用流体としての水を風呂往き路１４から導入できるようにしてある。供給管６０を接続しない場合は、図２（イ）に示すように、検査用接続部４３に対する栓部材６１と、この栓部材６１を検査用接続部４３に固定するばね材製のクリップ型栓ホルダー６２とを装着して、検査用接続部４３を閉じておく。図７に示すように、前記供給管６０は、前記水抜き部１４ｂに接続する水抜き側アダプター６０ａを一端側に、前記検査用接続部４３に差し込み接続する継手６０ｂを他端側にそれぞれ備える検査チューブによって作製してある。
【００１８】
前記切替弁４４は、これに一端側が一体摺動自在に連結している操作軸兼用の支軸４８を介して継手本体４５の支持部４５ｂに支持されているとともにこの支軸４８が前記支持部４５ｂを摺動自在に挿通していることにより、継手本体４５の筒部内にこれの軸芯方向にスライド移動自在に位置している。前記支軸４８の継手本体４５から外部に突出している端部に取り付けた丸棒材で形成することによって切替弁４４にこれと一体にスライド移動するように備えさせた操作部４４ａにより、切替弁４４を継手本体４５に対してスライド操作し、図２（イ）に示すように、切替弁４４の支軸連結用のボス部が継手本体４５のストッパー部４５ｃに当接する状態にすると、切替弁４４が熱媒通流状態になり、往き側継手４０は湯水が検査用接続部４３から漏れ出ないようにしながら高温暖房往き路２２から熱媒通流管３１に湯水供給できる状態になる。すなわち、継手本体４５の熱源機側接続部４２に連通している内部通路４５ｄと接続部形成体４７の端末側接続部４６に連通している内部通路４７ａとを連通させることによって熱源機側接続部４２と端末側接続部４６とを連通接続させ、継手本体４５の検査用接続部４３に連通している内部通路４５ｅを前記内部通路４５ｄおよび前記内部通路４７ａに対して遮断することによって検査用接続部４３を熱源機側接続部４２および端末側接続部４６に対して遮断する。
図２（ロ）に示すように、切替弁４４の支軸４８延出側とは反対側の側面が継手本体４５の内部に耐熱性の合成樹脂製筒体４９によって形成してある弁座４９ａに当接する状態にすると、切替弁４４が検査状態となり、往き側継手４０は検査用接続部４３からの水が熱源機側接続部４２に流入しないようにしながら端末側接続部４６に供給できる状態になる。すなわち、継手本体４５の前記内部通路４５ｄと接続部形成体４７の内部通路４７ａとを連通させることによって検査用接続部４３と端末側接続部４６とを連通接続させ、継手本体４５の内部通路４７ｄを接続部形成部材４７の内部通路４７ａに連通する箇所よりも熱源機側接続部４２の方によった箇所で閉じることにより、検査用接続部４３および端末器側接続部４６を熱源機側接続部４２に対して遮断する。
【００１９】
図３に示すように、前記戻り側継手５０は、連結ねじ５１が付いている熱源機側接続部５２を一端側に備え、他端側に検査用接続部５３を備え、内部に耐熱性の合成樹脂で作製した切替弁５４を備えている継手本体５５と、複数個の端末側接続部５６を一端側に備えているとともに他端側が継手本体５５の連結筒部５５ａに内嵌して継手本体５５に連結している筒体で成る接続部形成体５７とによって構成してある。前記連結ねじ５１を前記熱媒戻り路２３の端部に締め付け連結することにより、前記熱源側接続部５２を高温側熱媒通路ＨＲの戻り口であるところの熱媒戻り路２３の戻り口２３ａに対して接続でき、前記端末側接続部５６は、高温型端末器３０および低温型端末器それぞれにおける前記熱媒通流管３１の吐出側管部３１ｂの端部に付設のアダプタを連結することによって高温型端末器３０および低温型端末器の前記熱媒通流管３１に対して接続できるのであり、これらの接続操作を行うことにより、戻り側継手５０は高温側熱媒通路ＨＲおよび低温側熱媒通路ＬＲの戻り路２３を高温型端末器側の熱媒通流管３１にも低温型端末器側の熱媒通流管３１にも接続する状態になる。
【００２０】
前記検査用接続部５３は、前記往き側継手４０の検査用接続部５３と同様に構成してある。すなわち、前記風呂往き路１４が有する前記継手１４ａに備えられている水抜き部１４ｂに一端側を接続した供給管６０の他端側を接続したり、分離させたりするように構成してある。
【００２１】
前記切替弁５４は、前記往き側継手４０の切替弁４４と同様に構成してある。すなわち、切替弁５４の支軸５８の端部に連結する棒材でなる切替弁５４の操作部５４ａにより切替弁５４をスライド操作し、図３（イ）に示すように、切替弁５４の支軸連結用のボス部が継手本体５５のストッパー部５５ｃに当接する状態にすると、切替弁５４が熱媒通流状態になり、戻り側継手５０は湯水が検査用接続部５３から漏れ出ないようにしながら熱媒通流管３１から熱媒戻り路２３に湯水供給できる状態になる。すなわち、継手本体５５の熱源機側接続部５２に連通している内部通路５５ｄと接続部形成体５７の各端末側接続部５６に連通している内部通路５７ａとを連通させることによって熱源機側接続部５２と各端末側接続部５６とを連通接続させ、継手本体５５の検査用接続部５３に連通している内部通路５５ｄを前記内部通路５５ｄおよび前記内部通路５７ａに対して遮断することによって検査用接続部５３を熱源機側接続部５２および各端末側接続部５６に対して遮断する。
図３（ロ）に示すように、切替弁５４の支軸５８延出側とは反対側の側面が継手本体５５の内部に耐熱性の合成樹脂製筒体５９によって形成してある弁座５９ａに当接する状態にすると、切替弁５４が検査状態となり、戻り側継手５０は検査用接続部５３からの水が熱源機側接続部５２に流入しないようにしながら各端末側接続部５６に供給できる状態になる。すなわち、継手本体５５の前記内部通路５５ｄと接続部形成体５７の内部通路５７ａとを連通させることによって検査用接続部５３と各端末側接続部５６とを連通接続させ、継手本体５５の内部通路５７ｄを接続部形成部材５７の内部通路５７ａに連通する箇所よりも熱源機側接続部５２の方によった箇所で閉じることにより、検査用接続部５３および各端末器側接続部５６を熱源機側接続部５２に対して遮断する。
前記複数個の端末器側接続部５６のうちの熱媒通流管３１を接続しない端末器側接続部５６は、栓部材６４を装着して水が漏れ出ないように閉じておく。
【００２２】
端末器３０を設置した後などにおいて端末器側の熱媒通流管３１の気密検査を行うに当たり、エアーを検査用流体として行ってもよいが、水を検査用流体として次の如く行えるようにしてある。
すなわち、高温型の方の端末器３０における気密検査を行うに当たり、図１および図６に示す如く浴槽１２に、これの循環アダプター１２ａの湯水給排出口を閉じる安全弁付きの栓部材６５を取り付けるとともに、往き側継手４０と戻り側継手５０のうちのいずれか一方の継手４０，５０の検査用接続部４３，５３を前記供給管６０によって前記風呂往き路１４の前記水抜き部１４ｂに連通接続する。往き側継手４０の切替弁４４も戻り側継手５０の切替弁５４も前記熱媒通流状態に切り換えた状態にし、栓部材６５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から追焚系統および供給管６０に水を供給して追焚系統および供給管６０に水を充満させるとともに空気抜きを行う。次に、栓部材６５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、熱源機２０の熱媒通路ＨＲと端末器側の熱媒通流管３１とに水を供給し、補給水タンクＴの下限センサ２９ｂが検出状態になってから設定時間が経過すると給水を停止し、端末器側の熱媒通流管３１に水を充満させるとともにこの熱媒通流管３１の空気抜きを行う。すなわち、熱媒通流管３１の内部空気を熱媒通路ＨＲを通して補給水タンクＴから流出させる。これらの空気抜きが完了すると、往き側継手４０の切替弁４４も戻り側継手５０の切替弁５４も前記検査状態に切り換え操作し、風呂往き路１２からの水を供給管６０によって継手４０，５０に供給し、この給水によって端末器側の熱媒通流管３１に加圧する。このとき、風呂戻り路１３が備えている水位センサ１７が設定圧になるまで加圧する。この後、加圧操作を停止し、風呂戻り路１３の水位センサ１７により、圧力低下の有無を検出したり、圧力低下の速度を検出し、著しい圧力低下や、急速度の圧力低下がなければ端末器３０における熱媒通流管３１が良好な気密状態にあると判断する。
この気密検査を完了すると、供給管６０を継手４０，５０から取り外し、往き側継手４０の切替弁４４も戻り側継手５０の切替弁５４も前記熱媒通流状態に切り換え操作して熱源機側の熱媒通路ＨＲを端末器側の熱媒通流管３１に連通させる。
低温型の方の端末器における気密検査を行う場合には、低温側の往き側継手４０と戻り側継手５０のうちのいずれか一方の検査用接続部４３，５３に前記供給管６０を接続し、その他は、高温型端末器における気密検査と同様に行う。
また、高温型と低温型の両端末器が接続されている場合、供給管６０を戻り側継手５０の検査用接続部５３に接続し、高温型端末器３０の熱媒通流管３１と低温型端末器の熱媒通流管とを同時に気密検査する。
【００２３】
図２または図３に示すように、前記往き側継手４０においても戻り側継手５０においても、継手本体４５，５５のばね受け部と切替弁４４，５４との間に設けたコイル型のスプリング６６によって切替弁４４，４５を前記検査状態に付勢してある。
前記操作部４４ａ，５４ａを支軸４８，５８の軸芯まわりで継手本体４５，５５に対して回動操作できるように支軸４８，５８に相対回転自在に支持させてある。
前記継手本体４５，５５を成型する際にこの継手本体４５，５５の一端側に同時に成型するとともに支軸４８，５８の両横側に分散するように配置した図５の如き一対のストッパー６７，６７と、前記操作部４４ａ，５４ａとにより、切替弁４４，５４をスプリング６６に抗して熱媒通流状態に保持する保持手段６８を構成し、操作部４４ａ，５４ａのスライド操作と回転操作とによって切替弁４４，４５を熱媒通流状態と検査状態とに切り換えるようにしてある。
すなわち、切替弁４４，５４が検査状態にある場合、操作部４４ａ，５４ａをストッパー６７，６７どうしの間からストッパー６７の先端側に引き出し操作し、ストッパー６７の先端側に出ると回転操作して操作部４４ａ，５４ａの両端部をストッパー６７の作用部６７ａに係止させる。すると、切替弁４４，５４が熱媒通流状態になるとともにスプリング６６が弾性変形した状態になり、各ストッパー６７，６７の作用部６７ａが操作部４４ａ，５４ａをスプリング６６によって引き戻されないように受け止め支持する。これにより、切替弁４４，５４は熱媒通流状態に切り換わるとともにこの熱媒通流状態に保持手段６８によってスプリング６６に抗して保持される。
各ストッパー６７，６７に受け止め支持されている操作部４４ａ，５４ａを回転操作して両ストッパー６７，６７から外す。すると、スプリング６６が操作部４４ａ，５４ａをストッパー６７どうしの間に引き込み操作するとともに切替弁４４，５４を検査状態に復帰付勢する。これにより、切替弁４４，５４が検査状態に自ずと切り換わる。
【００２４】
〔別実施形態〕
熱源機２０のみを備える装置の場合にも本発明は適用できる。この場合、継手４０，５０の検査用接続部に水道からの供給管を接続するとともに、この供給管などに圧力センサを装着して気密検査を行う。
高温型と低温型のいずれか一方の端末器にのみ熱媒を供給する装置の場合にも適用できる。
熱交換器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熱源機の場合にも、本発明は適用できる。
【図面の簡単な説明】
【図１】給湯装置全体の概略図
【図２】往き側継手の断面図
【図３】戻り側継手の断面図
【図４】継手の検査用接続部の斜視図
【図５】保持機構の斜視図
【図６】検査状態の説明図
【図７】供給管の説明図
【図８】従来の継手の検査状態での断面図
【図９】従来の継手の熱媒通流状態での断面図
【図１０】従来の継手の使用および検査状態の説明図
【符号の説明】
２１熱媒加熱手段
２２ａ，２５ａ吐出口
２３ａ戻り口
３０端末器
３１熱媒通流管
４２，５２熱源機側接続部
４３，５３検査用接続部
４４，５４切替弁
４４ａ，５４ａ操作部
４６，５６端末側接続部
６０供給管
６６スプリング
６７ストッパー
６８保持手段[0001]
BACKGROUND OF THE INVENTION
The present invention is connected to the return port or the discharge port in the heat source apparatus having a heat medium passage from the return port of the heat medium that circulates and supplies to the terminal device to the discharge port of the heat medium via the heat medium heating means. This relates to a joint for a heat source machine.
[0002]
[Prior art]
Conventionally, as shown in FIGS. 8 and 9, as the heat source unit joint, one heat source unit side connection part 42, a plurality of terminal side connection parts 46, and the heat source unit side connection part 42 are connected to each terminal side connection part 46. In some cases, there is provided one switching valve 44 that is connected to or disconnected from.
That is, for example, in a hot water supply apparatus for general households, as shown in FIG. 10 (a), the discharge port 22a and the return port 23a of the heat medium passages 22 and 23 in the heating heat source machine are connected to the heating medium of the heating terminal 30 by this joint. Connect to the flow pipe 31. Then, when the construction of the hot water supply system is completed, the switching valve 44 is switched to the inspection state shown in FIG. 8 by rotating the screw type operation portion 44a of the switching valve 44 in each joint on the discharge port side and the return port side. Therefore, the heat source passages 22 and 23 on the heat source device side and the heat medium flow on the terminal device side are closed so that the heat source device side connection portions 42 are disconnected from the respective terminal side connection portions 46 so that pressure does not leak to the heat source device side. A terminal that is disconnected from the pipe 31 and is not connected to the terminal side heat medium flow pipe 31 of the plurality of terminal side connection portions 46 in the joint 40 on either the discharge port side or the return port side. A test fluid supply pipe 60 is connected to the side connection portion 46 to supply and pressurize the test fluid to the heat medium flow pipe 31 on the terminal side. That is, the airtight inspection on the terminal side is performed using one of the plurality of terminal side connection portions 46 as an inspection connection portion. In normal times, as shown in FIGS. 9 and 10 (a), the switching medium 44 in each of the joints 40 and 50 on the discharge port side and the return port side is rotated by the operation portion 44a, and the heat medium shown in FIG. By switching to the flow state, the heat source unit side connection part 42 is connected to each terminal side connection part 46 in communication, and the heat medium on the heat source unit side is circulated between the heat source unit side and the terminal unit side. The passages 22 and 23 are communicated with the heat medium flow pipe 31 on the terminal side.
[0003]
[Problems to be solved by the invention]
For example, in the case of a hot water supply device for general households, it is necessary to prepare a compressor if air is used as the inspection fluid, and it is easy to obtain with tap water and there is no problem even if mixed in a heat medium. Therefore, tap water may be inspected as an inspection fluid.
When the liquid is used as the inspection fluid in this way, when the inspection is finished and the fluid supply pipe is removed from the joint, the liquid that has filled the heat transfer pipe on the terminal side leaks from the joint. Will occur. For example, if the fitting is located in a meter box, the meter may fail due to spilled water.
An object of the present invention is to provide a joint for a heat source machine that can be inspected while avoiding the outflow of the inspection fluid.
[0004]
[Means for Solving the Problems]
In order to achieve the object, according to the invention described in claim 1, the heat source machine side connection part connected to the return port or the discharge port of the heat medium in the heat source machine, and the heat medium flow pipe on the terminal side are connected. A terminal-side connection portion, a test connection portion to which a test fluid supply pipe is connected, and the heat-source-device-side connection portion and the terminal-side connection portion are connected in communication and the test-connection portion is the heat-source device. A heat medium flow state interrupted with respect to the side connection part and the terminal side connection part, and the inspection connection part and the terminal side connection part are connected in communication and the inspection connection part and the terminal side connection part Is provided with a switching valve that can be switched to an inspection state that is cut off with respect to the heat source unit side connection portion.
That is, by connecting the heat source machine side connection part to the return port or discharge port of the heat medium in the heat source machine, and connecting the terminal side connection part to the heat medium flow pipe on the terminal unit side, the heat medium path on the heat source machine side and The terminal is connected to the heat medium flow pipe on the terminal side. When the inspection fluid supply pipe is connected to the inspection connection portion and the switching valve is switched to the inspection state, the inspection connection portion and the terminal side connection portion are connected to each other and the inspection connection portion and the terminal side are connected. By disconnecting the connection portion from the heat source unit side connection portion, the inspection fluid from the supply pipe can be supplied to the heat medium flow pipe of the terminal and pressurized to the heat medium flow pipe. When the switching valve is switched from this state to the heat medium flow state, the heat source machine side connection part and the terminal side connection part are connected to each other and the inspection connection part is connected to the heat source machine side connection part and the terminal side connection part. By being interrupted, the heat medium passage on the heat source device side and the heat medium flow pipe on the terminal device side can be communicated so that the heat medium circulates between the heat source device side and the terminal device side, In addition, the inspection fluid supply pipe can be removed from the inspection connection section while preventing the inspection fluid filled in the heat medium flow pipe of the terminal from flowing out of the inspection connection section.
Therefore, the inspection fluid can be supplied to the heat transfer pipe of the terminal unit to perform an airtight inspection on the terminal side, and the test fluid filled in the heat transfer pipe will later flow out of the connection for inspection. For example, in the case of a hot water supply system, tap water is used as the fluid for inspection, eliminating the need for a compressor, making it cheap and easy, and while avoiding troubles such as meter breakdown due to water spills. Airtight inspection can be performed advantageously.
[0005]
Also, Claim 1 According to the invention described in the above, the spring for returning the switching valve to one side of the heat medium flow state and the inspection state and the switching valve operated to the other side are held against the return biasing force. When the holding means is provided and the holding by the holding means is released, the switching valve automatically returns to one side of the heat medium flow state and the inspection state due to the spring.
Therefore, the switching valve can be easily switched between the heat medium flow state and the inspection state only by performing a simple operation for releasing the holding by the holding means. In addition, if the switching valve is switched by a turning operation of the screw-type operation unit, insufficient switching is likely to occur, such as being half-opened without sufficiently switching to a predetermined heat medium flow state or inspection state. On the other hand, the spring is sufficiently switched to a predetermined operation state, and the switching operation can be performed while preventing insufficient switching, so that the heat medium flow state or the inspection state can be switched quickly, easily and accurately.
[0006]
Also, Claim 1 According to the invention, the switching valve is urged to return to the inspection state by the spring, and the heating medium is held between the heat source device side and the terminal side while the switching valve is held in the heating medium circulation state by the holding means. Circulating fluid. In other words, when the switching valve is configured to circulate and flow the heat medium while maintaining the heat medium flow state with the urging force of the spring, if the spring is deteriorated, the switching valve is likely to shift to the inspection side. Even if the spring is deteriorated, the heat transfer medium can be circulated and flowed while the switching valve is firmly held so as not to move to the inspection side. Therefore, the heat medium becomes highly reliable so that it is difficult to leak over a long period of time.
[0007]
Also, Claim 1 According to the invention described in (1), the switching valve is configured to be switched between the heat medium flow state and the inspection state by sliding, and the switching valve is configured to be switched to the heat medium flow state and the inspection state. The holding means is constituted by an operating portion provided and a stopper that holds the switching valve against a return biasing force by receiving the operating portion, and the operating portion is engaged with and disengaged from the stopper by a rotating operation. The switching valve is switched to the heat medium flow state or the inspection state by sliding the operation portion, and the operation valve is rotated and received by the stopper by rotating the operation portion. It is held in the inspection state. Therefore, the switching valve can be easily switched between the heat medium flow state and the inspection state by simply performing a simple operation of rotating and sliding the operation portion, so that it is advantageous in terms of operation.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, an example of a general hot water supply device 1 provided with a finned tube type hot water supply heat exchanger 2, a hot water supply device 10 for a bath provided with a finned tube type additional heat exchanger 11, and a heating medium heating means. As a heating source device 20 for heating provided with a fin tube type heating heat exchanger 21 as a general hot water supply device for home use. This hot water supply device supplies hot water to a general hot water tap 3 such as a currant or a shower, fills the bathtub 12 with hot water, and remedies the hot water in the bathtub 12, and provides a floor heating device, a bathroom heating device, a dishwasher, a fan controller. Hot water as a heating medium is circulated and supplied to a heating terminal 30 such as a vector, and the details are configured as follows.
[0009]
The general hot water supply apparatus 1 includes a hot water supply heat exchanger 2, a water supply path 4 connected to the inlet side of the hot water supply heat exchanger 2, a hot water supply path 5 connected to the outlet side of the hot water supply heat exchanger 2, The hot water supply gas burner 6 is used to heat the heat exchanger 2, the water supply path 4 is connected to a household water pipe, and the hot water supply path 5 is connected to a plug-side hot water supply pipe 7 communicating with the hot water tap 3. Thus, the water from the water pipe is supplied to the hot water supply heat exchanger 2 through the water supply passage 4 and heated, and the heated hot water 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 water from the water pipe to the hot water supply path 5 by bypassing the hot water supply heat exchanger 2. . 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.
[0010]
The hot water supply apparatus 10 for a bath includes the follow-up heat exchanger 11, a bath return path 13 connected to the entrance side of the follow-up heat exchanger 11, and a bath connected to the exit side of the follow-up heat exchanger 11. The hot water supply gas burner 6 that heats the outgoing path 14, the bath return path 13 and the hot water supply path 5 communicating with the hot water supply path 15 and the reheating heat exchanger 11 is provided. The bath return path 13 is connected to the bathtub side return path 12b extending from the circulation adapter 12a of the bathtub 12 by the joint 13a, and the bathtub 14 extends from the adapter 12a by the joint 14a provided in the bath path 14 By connecting to the side road 12c, hot water is put on the bathtub 12 or the hot water of the bathtub 12 is memorized. That is, hot water from the hot water supply path 5 is supplied to the bath return path 13 through the hot water filling path 15 and supplied to the bathtub 12 through the memorial heat exchanger 11, the bath outbound path 14, and the bath side outbound path 12b. When the remedy circulation pump 16 provided in the bath return path 13 is driven, the hot water of the bathtub 12 is circulated between the remedy heat exchanger 11 and the tub 12 by the feed action of the pump 16 to remedy it. .
[0011]
The bath return path 13 includes a water level sensor 17 that detects the water level in the bathtub 12 based on the pressure acting on the bath return path 13, a bath return thermistor 13b, a bath two-way valve 13c, an air replacement solenoid valve 13d, a water flow A switch 13e is provided. The memorial heat exchanger 11 includes a bathing thermistor 11a. The hot water filling passage 15 is provided with a pouring electromagnetic valve 15a.
[0012]
The heating heat source unit 20 includes the heating heat exchanger 21, a high-temperature heating outgoing path 22 connected to the outlet side of the heating heat exchanger 21, and a heating medium return path connected to the inlet side of the makeup water tank T. A heating medium passage HR on the high temperature side composed of 23, etc., a low temperature heating outgoing passage 25 branched from a heating medium passage 24 communicating the outlet side of the makeup water tank T and the inlet side of the heating heat exchanger 21, and The high-temperature side heat provided on one end side of the high-temperature heating forward path 22 is constituted by a low-temperature-side heat medium path LR including the heat medium return path 23 and the like, and a heating gas burner 26 for heating the heating heat exchanger 21. The discharge port 22a of the medium passage HR is connected to the receiving side pipe portion 31a of the terminal side heat medium flow pipe 31 connected to the high temperature type heating terminal 30 and the heat medium return path 23 High temperature side heat medium passage H provided on one end side of The return port 23a is connected to the discharge side pipe portion 31b of the heat medium flow pipe 31, and the heat medium circulation pump 27 provided in the heat medium passage 24 is driven, whereby a high temperature as a heat medium is obtained. Hot water is circulated and supplied to the terminal 30 for heating. Heat medium flow pipe (not shown) connecting the discharge port 25a of the low temperature side heating medium passage LR provided on one end side of the low temperature heating outgoing path 25 to a low temperature heating terminal (not shown). And connecting the return port 23a of the low temperature side heat medium passage LR provided on one end side of the heat medium return path 23 to the discharge side pipe part of the heat medium flow pipe. By driving the heat medium circulation pump 27, low-temperature hot water as a heat medium is circulated and supplied to the low-temperature heating terminal. The return port 23a and the return path 23 of the high temperature side heat medium passage HR and the low temperature side heat medium passage LR are common.
[0013]
That is, when the heat medium circulation pump 27 is driven, the feeding action of the pump 27, the heating high temperature thermistor 22b provided near the heating heat exchanger 21 of the high temperature heating outgoing path 22, and the low temperature heating outgoing path 25 are provided. Of the hot water flow based on the detection results of the heating return thermistor 25b provided near the heating medium passage 24 and the heating return thermistor 23b provided in the heating medium return path 23, respectively. Water in the makeup water tank T to which tap water is supplied via the tank water supply path 28 flows into the heat medium passage 24, and hot water heated by the heating heat exchanger 21 is supplied to the high-temperature heating outbound path 22 to generate a high temperature. The hot water returning from the high temperature terminal 30 and the hot water returning from the low temperature terminal 30 are returned to the make-up water tank T by the heat medium return path 23 and supplied to the mold terminal 30. It flows into the heat medium passage 24 or is supplied to the low temperature heat medium feed flow 25, or is supplied to the heating heat exchanger 21. As a result, the high-temperature side heating medium 22, the heating medium return path 23, the heating medium path 24, and the make-up water tank T reach the discharge port 22 a from the return port 23 a via the heating heat exchanger 21. A passage HR is formed, and high-temperature hot water as a heat medium is circulated and supplied to the high-temperature heating terminal 30 through the heat medium passage HR. The low-temperature heating medium passage 25, the heating medium return passage 23, the make-up water tank T, the heating medium passage 24, etc. reach the discharge port 25a from the return port 23a via the heating heat exchanger 21. An LR is formed, and low-temperature hot water as a heat medium is circulated and supplied to a low-temperature heating terminal through the heat medium passage LR.
[0014]
The tank water supply passage 28 is provided with a makeup water valve 28a and a makeup water electromagnetic valve 28b. The makeup water tank T includes an upper limit sensor 29a for detecting the upper limit of the water level, a lower limit sensor 29b for detecting the lower limit of the water level, and an overflow path 29c. The gas supply path 36 for supplying combustion gas to the hot water supply gas burner 6 and the heating gas burner 26 includes an original gas solenoid valve 36a, a hot water supply proportional valve 36b, a hot water supply solenoid valve 36c, a gas switching solenoid valve 36d, and a heating gas solenoid valve 36e. A heating gas proportional valve 36f is provided.
[0015]
As shown in FIG. 1, in the heat medium passages HR and LR, a forward side joint 40 for connecting the high temperature heating outgoing path 22 to the heat medium flow pipe 31 in the terminal unit 30 and a low temperature side heating outgoing path 25 are connected to the terminal unit. And a return side joint 50 for connecting the heat medium return path 23 to the heat medium flow pipe 31 of each of the high temperature type terminal device 30 and the low temperature type terminal device. .
[0016]
As shown in FIG. 2, both the forward joint 40 on the high temperature heating side and the forward joint 40 on the low temperature heating side are provided with a heat source machine side connection portion 42 with a connecting screw 41 at one end side, and the other end side. A joint body 45 having a switching valve 44 made of a heat-resistant synthetic resin and a terminal-side connection part 46 at one end side and the other end side being a joint body 45. It is comprised by the connection part formation body 47 internally fitted in the connection cylinder part 45a, and connecting with the coupling main body 45. As shown in FIG. By tightening and connecting the connecting screw 41 to the end of the high temperature heating outbound path 22, the heat source side connecting portion 42 is a discharge port 22a of the high temperature heating outbound path 22 which is an outlet of the high temperature side heating medium passage HR. The terminal side connection portion 46 can be connected to the heat medium flow tube 31 by being fitted into the end portion of the reception side tube portion 31a of the heat medium flow tube 31. By performing these connection operations, the outgoing side joint 40 is in a state of connecting the high temperature heating outgoing path 22 of the high temperature side heating medium passage HR and the terminal unit side heating medium flow pipe 31.
[0017]
The inspection connecting portion 43 is connected to the other end side of the supply pipe 60 having one end side connected to the water draining portion 14b provided in the joint 14a of the bath outlet 14 as shown by a one-dot chain line in FIG. Or are separated. That is, by connecting the supply pipe 60, water as the inspection fluid can be introduced from the bath going path 14. When the supply pipe 60 is not connected, as shown in FIG. 2A, a plug member 61 for the inspection connecting portion 43 and a clip-type plug made of a spring material for fixing the plug member 61 to the inspection connecting portion 43 The holder 62 is attached, and the inspection connecting portion 43 is closed. As shown in FIG. 7, the supply pipe 60 includes a water drain side adapter 60 a connected to the water drain portion 14 b on one end side and a joint 60 b inserted and connected to the inspection connection portion 43 on the other end side. It is made with a test tube.
[0018]
The switching valve 44 is supported by a support portion 45b of a joint body 45 via a support shaft 48 serving as an operating shaft, and one end side of which is slidably connected to the switch valve 44, and the support shaft 48 is supported by the support portion. By being slidably inserted through 45b, the joint body 45 is positioned so as to be slidable in the axial direction of the joint body 45. The switching valve 44 is formed by a round bar attached to the end projecting from the joint body 45 of the support shaft 48 to the switching valve 44 so as to slide integrally therewith. When the boss portion for connecting the support shaft of the switching valve 44 is brought into contact with the stopper portion 45c of the joint body 45 as shown in FIG. 44 is in a heat medium flow state, and the forward joint 40 is in a state in which hot water can be supplied from the high temperature heating forward path 22 to the heat medium flow pipe 31 while preventing hot water from leaking from the inspection connection portion 43. That is, by connecting the internal passage 45 d communicating with the heat source machine side connection portion 42 of the joint body 45 and the internal passage 47 a communicating with the terminal side connection portion 46 of the connection portion forming body 47, the heat source machine side connection is established. The connection portion 42 and the terminal side connection portion 46 are connected in communication, and the internal passage 45e connected to the inspection connection portion 43 of the joint body 45 is cut off from the internal passage 45d and the internal passage 47a. The connection part 43 is cut off from the heat source apparatus side connection part 42 and the terminal side connection part 46.
As shown in FIG. 2 (b), a valve seat 49 a having a side surface opposite to the extension side of the support shaft 48 of the switching valve 44 formed in the joint body 45 by a heat-resistant synthetic resin cylinder 49. The switching valve 44 is in the inspection state, and the forward joint 40 can be supplied to the terminal side connection portion 46 while preventing the water from the inspection connection portion 43 from flowing into the heat source device side connection portion 42. become. That is, by connecting the internal passage 45 d of the joint body 45 and the internal passage 47 a of the connection portion forming body 47, the inspection connection portion 43 and the terminal side connection portion 46 are connected to each other, and the internal passage 47 d of the joint body 45 is connected. Is closed at a location closer to the heat source device side connection portion 42 than a location communicating with the internal passage 47a of the connection portion forming member 47, whereby the inspection connection portion 43 and the terminal side connection portion 46 are connected to the heat source device side. The unit 42 is blocked.
[0019]
As shown in FIG. 3, the return side joint 50 includes a heat source machine side connection part 52 with a connection screw 51 on one end side, an inspection connection part 53 on the other end side, and a heat resistant interior. A joint body 55 having a switching valve 54 made of a synthetic resin, and a plurality of terminal-side connection portions 56 at one end side, and the other end side is fitted into the connecting cylinder portion 55a of the joint body 55, and the joint is fitted. The connecting portion forming body 57 is a cylindrical body connected to the main body 55. By tightening and connecting the connecting screw 51 to the end of the heat medium return path 23, the heat source side connection part 52 is a return port 23a of the heat medium return path 23 which is a return port of the high temperature side heat medium path HR. The terminal side connection part 56 connects an attached adapter to the end part of the discharge side pipe part 31b of the heat medium flow pipe 31 in each of the high temperature type terminal unit 30 and the low temperature type terminal unit. Thus, the return side joint 50 can be connected to the high temperature side heat medium passage HR and the low temperature side by performing these connection operations. The return path 23 of the heat medium passage LR is connected to both the heat medium flow pipe 31 on the high temperature type terminal side and the heat medium flow pipe 31 on the low temperature type terminal side.
[0020]
The inspection connecting portion 53 is configured in the same manner as the inspection connecting portion 53 of the forward joint 40. That is, the other end side of the supply pipe 60 connected to one end side is connected to or separated from the drainage portion 14b provided in the joint 14a of the bath going-out path 14.
[0021]
The switching valve 54 is configured in the same manner as the switching valve 44 of the forward joint 40. That is, the switching valve 54 is slid by the operation portion 54a of the switching valve 54 made of a rod connected to the end of the support shaft 58 of the switching valve 54, and as shown in FIG. When the boss for connecting the shaft comes into contact with the stopper 55 c of the joint body 55, the switching valve 54 enters the heat medium flow state so that the return side joint 50 does not leak hot water from the inspection connection part 53. In this state, hot water can be supplied from the heat medium flow pipe 31 to the heat medium return path 23. That is, by connecting the internal passage 55d communicating with the heat source device side connection portion 52 of the joint body 55 and the internal passage 57a communicating with each terminal side connection portion 56 of the connection portion forming body 57, the heat source device side. By connecting the connecting portion 52 and each terminal side connecting portion 56 in communication, the internal passage 55d communicating with the inspection connecting portion 53 of the joint body 55 is blocked from the internal passage 55d and the internal passage 57a. The inspection connecting portion 53 is blocked from the heat source device side connecting portion 52 and each terminal side connecting portion 56.
As shown in FIG. 3 (b), a valve seat 59 a in which the side surface of the switching valve 54 opposite to the side from which the support shaft 58 extends is formed inside the joint body 55 by a heat-resistant synthetic resin cylinder 59. The switching valve 54 is in an inspection state, and the return side joint 50 can supply water from the inspection connection portion 53 to each terminal side connection portion 56 while preventing water from flowing into the heat source unit side connection portion 52. It becomes a state. That is, by connecting the internal passage 55 d of the joint body 55 and the internal passage 57 a of the connection portion forming body 57, the inspection connection portion 53 and each terminal side connection portion 56 are connected to each other. By closing 57d at a location that is closer to the heat source device side connection portion 52 than to a location that communicates with the internal passage 57a of the connection portion forming member 57, the inspection connection portion 53 and each terminal side connection portion 56 are connected to the heat source device. The side connection part 52 is cut off.
Of the plurality of terminal-side connection portions 56, the terminal-side connection portion 56 that is not connected to the heat medium flow pipe 31 is fitted with a plug member 64 so that water does not leak out.
[0022]
In performing an airtight inspection of the heat medium flow pipe 31 on the terminal side after the terminal unit 30 is installed, air may be used as a test fluid, but water may be used as a test fluid as follows. It is.
That is, when performing an airtight inspection in the high-temperature type terminal 30, as shown in FIGS. 1 and 6, a stopper member 65 with a safety valve for closing the hot water supply / discharge port of the circulation adapter 12 a is attached to the bathtub 12. The inspection connecting portions 43 and 53 of one of the joints 40 and 50 of the return side joint 40 and the return side joint 50 are connected to the drain portion 14b of the bath return path 14 through the supply pipe 60. . The switching valve 44 of the forward coupling 40 and the switching valve 54 of the return coupling 50 are switched to the heat medium flow state, the safety valve of the plug member 65 is opened, the hot water solenoid valve 15a is opened, and the hot water is filled. Water is supplied from the passage 15 to the remedy system and the supply pipe 60 to fill the remedy system and the supply pipe 60 with water, and air is vented. Next, the safety valve of the plug member 65 is switched to the closed state, the tank water supply passage 28 is opened, the heat medium circulation pump 27 is driven, and the heat medium passage HR of the heat source device 20 and the heat medium flow pipe 31 on the terminal side are connected. When water is supplied and the set time elapses after the lower limit sensor 29b of the makeup water tank T is in the detection state, the water supply is stopped, and the heat medium flow pipe 31 on the terminal side is filled with water and the heat medium flow is stopped. The flow tube 31 is vented. That is, the internal air of the heat medium flow pipe 31 is caused to flow out of the makeup water tank T through the heat medium passage HR. When these air vents are completed, the switching valve 44 of the forward joint 40 and the switching valve 54 of the return joint 50 are switched to the inspection state, and water from the bath outlet 12 is supplied to the joints 40 and 50 by the supply pipe 60. Supply and pressurize the heat medium flow pipe 31 on the terminal side by this water supply. At this time, the pressure is increased until the water level sensor 17 provided in the bath return path 13 reaches the set pressure. Thereafter, the pressurization operation is stopped, and the water level sensor 17 in the bath return path 13 detects the presence or absence of pressure drop, or detects the pressure drop speed. If there is no significant pressure drop or sudden pressure drop, It is determined that the heat medium flow pipe 31 in the terminal 30 is in a good airtight state.
When this airtight inspection is completed, the supply pipe 60 is removed from the joints 40 and 50, and the switching valve 44 of the forward joint 40 and the switching valve 54 of the return joint 50 are switched to the heat medium flow state to operate the heat source side. The heat medium passage HR is communicated with the heat medium flow pipe 31 on the terminal side.
When performing an airtight inspection in the low temperature type terminal, the supply pipe 60 is connected to one of the inspection connection portions 43 and 53 of the low temperature side joint 40 and the return side joint 50. Others are performed in the same manner as the airtightness inspection in the high temperature type terminal.
When both the high temperature type and low temperature type terminals are connected, the supply pipe 60 is connected to the inspection connection portion 53 of the return side joint 50, and the heat medium flow pipe 31 of the high temperature type terminal 30 is connected to the low temperature terminal. Simultaneously airtightly inspect the heat transfer pipe of the type terminal.
[0023]
As shown in FIG. 2 or 3, the coil-type spring 66 provided between the spring receiving portion of the joint body 45, 55 and the switching valve 44, 54 in both the forward side joint 40 and the return side joint 50. Therefore, the switching valves 44 and 45 are biased to the inspection state.
The operation portions 44a and 54a are supported on the support shafts 48 and 58 so as to be rotatable relative to the joint bodies 45 and 55 around the shaft centers of the support shafts 48 and 58.
When molding the joint bodies 45, 55, a pair of stoppers 67 as shown in FIG. 5 are formed so as to be simultaneously molded on one end side of the joint bodies 45, 55 and distributed on both lateral sides of the support shafts 48, 58. 67 and the operation parts 44a and 54a constitute a holding means 68 for holding the switching valves 44 and 54 in a state where heat medium flows against the spring 66, and slide operation and rotation operation of the operation parts 44a and 54a. Thus, the switching valves 44 and 45 are switched between the heat medium flow state and the inspection state.
That is, when the switching valves 44 and 54 are in the inspection state, the operation portions 44a and 54a are pulled out to the front end side of the stopper 67 between the stoppers 67 and 67, and are rotated when they come out to the front end side of the stopper 67. Both end portions of the operation portions 44 a and 54 a are locked to the action portion 67 a of the stopper 67. Then, the switching valves 44 and 54 are brought into the heat medium flow state and the spring 66 is elastically deformed, so that the operating portion 67a of each stopper 67 and 67 is not pulled back by the spring 66. Receive and support. As a result, the switching valves 44 and 54 are switched to the heat medium flow state and are held against the spring 66 by the holding means 68 in the heat medium flow state.
The operating portions 44a and 54a received and supported by the stoppers 67 and 67 are rotated and removed from the stoppers 67 and 67. Then, the spring 66 pulls the operating portions 44a and 54a between the stoppers 67 and urges the switching valves 44 and 54 to return to the inspection state. Thereby, the switching valves 44 and 54 are automatically switched to the inspection state.
[0024]
[Another embodiment]
The present invention can also be applied to an apparatus including only the heat source unit 20. In this case, a supply pipe from the water supply is connected to the inspection connecting portion of the joints 40 and 50, and a pressure sensor is attached to the supply pipe and the like to perform an airtight inspection.
The present invention can also be applied to an apparatus that supplies a heat medium only to either one of a high temperature type and a low temperature type terminal.
In addition to the heat exchanger 21 being heated by gas, the present invention can also be applied to a heat source device heated by electricity or oil.
[Brief description of the drawings]
FIG. 1 is a schematic view of an entire hot water supply apparatus.
[Fig. 2] Cross section of forward joint
FIG. 3 is a sectional view of a return side joint
FIG. 4 is a perspective view of a joint connection part for inspection.
FIG. 5 is a perspective view of a holding mechanism.
FIG. 6 is an explanatory diagram of an inspection state
FIG. 7 is an explanatory diagram of a supply pipe
FIG. 8 is a sectional view of a conventional joint in an inspection state.
FIG. 9 is a sectional view of a conventional joint in a state where a heat medium flows.
FIG. 10 is an explanatory view of the use and inspection state of a conventional joint.
[Explanation of symbols]
21 Heating medium heating means
22a, 25a Discharge port
23a Return port
30 terminal
31 Heat transfer pipe
42,52 Heat source side connection
43,53 Inspection connection
44, 54 selector valve
44a, 54a operation unit
46,56 Terminal side connection
60 Supply pipe
66 Spring
67 Stopper
68 Holding means

Claims

For the heat source device connected to the return port or the discharge port in the heat source device having a heat medium passage from the return port of the heat medium circulatingly supplied to the terminal to the discharge port of the heat medium via the heat medium heating means A joint,
A heat source machine side connection part connected to the return port or the discharge port, a terminal side connection part to which a heat medium flow pipe on the terminal side is connected, a test connection part to which a test fluid supply pipe is connected, and In addition, the heat source device side connection portion and the terminal side connection portion are connected in communication and the inspection connection portion is blocked from the heat source device side connection portion and the terminal side connection portion, The inspection connection portion and the terminal side connection portion are connected in communication, and can be switched to an inspection state in which the inspection connection portion and the terminal side connection portion are disconnected from the heat source device side connection portion. A valve is provided ,
A spring for returning and energizing the switching valve on one side of the heat medium flow state and the inspection state; and a holding means for holding the switching valve operated on the other side against the return energizing force. Provided,
The switching valve is urged to return to the inspection state by the spring,
The switching valve is configured to switch between the heat medium flow state and the inspection state by sliding, and the switching valve is operated to slide to switch between the heat medium flow state and the inspection state. The holding means is configured by an operation portion provided to slide and move integrally with the valve, and a stopper that holds the switching valve against a return biasing force by receiving the operation portion. A joint for a heat source machine configured to be engaged with and disengaged from the stopper by a rotating operation .