JP3710892B2

JP3710892B2 - Water heater

Info

Publication number: JP3710892B2
Application number: JP24418896A
Authority: JP
Inventors: 徹青木; 彰彦田村; 具裕今井; 宏志木村; 裕三山本
Original assignee: Noritz Corp
Current assignee: Noritz Corp
Priority date: 1996-08-26
Filing date: 1996-08-26
Publication date: 2005-10-26
Anticipated expiration: 2016-08-26
Also published as: JPH1068533A

Description

【０００１】
【発明の属する技術分野】
本発明は給湯装置に関する。
【０００２】
【従来の技術】
最近における給湯装置は、多機能の温水供給機能を備えた給湯装置が多く、従って、基本的な給湯の回路の他に風呂追い焚き用の循環回路や暖房運転用の回路等の管が多数、熱交換缶体に出入りして接続されている。前記熱交換缶体に出入りする回路の管は、回路毎に２管あるので、全体としてかなりの管数となっていた。
【０００３】
【発明が解決しようとする課題】
ところが上記した従来の給湯装置において、例えば長期間使用しない場合や冬季低温時の凍結防止のために、管内の水を排水しておく必要が生じるが、従来においては一般に各管毎に排水栓を設けて、この排水栓を必要に応じて外すことで管内の排水を行っていた。このため排水栓の取り外し作業が何箇所にもなって、作業が面倒で煩わしいという問題があった。
【０００４】
そこで本発明は、上記従来における給湯装置の問題を解消し、必要な排水栓の数を減少させて、排水作業を容易に行うことができる給湯装置の提供を課題とする。
その他、排水栓を各回路毎に共通化して数を減らした場合に、凍結防止運転のための循環を確保することができる給湯装置の提供を課題とする。
【０００５】
【課題を解決するための手段】
上記課題を達成するため、本発明の給湯装置は、少なくとも熱交換缶体に対して入水管と出湯管を接続してなる給湯回路を備え、また加えて風呂追い焚き循環回路や暖房循環回路等の循環回路を必要に応じて熱交換缶体に接続してなる給湯装置であって、前記熱交換缶体に接続される回路に対して、該回路の熱交換缶体に対する入管と出管との間に介在して共通の配水路を自在に構成する排水共通化手段を設けたものにおいて、前記排水共通化手段は直筒状本体を有し、該直筒状本体の下端側を排水管部とすると共に途中を連通管部とし、該連通管部を挟んだ上下の位置でそれぞれ前記入管と出管に接続され、且つ前記連通管部と排水管部とを開放自在に閉塞する１つの排水栓部材を有することを第１の特徴としている。
また本発明の給湯装置は、上記第１の特徴に加えて、排水栓部材のうち連通管部閉塞部分には、入管と出管との通路とをつなぐリーク孔を設けていることを第２の特徴としている。
【０００６】
上記本発明の第１の特徴によれば、熱交換缶体に対して入管と出管とで接続された給湯回路やその他の各回路において、入管から熱交換缶体に入った水はそこで加熱され、出管に出湯される。
熱交換缶体内の水は、長期間使用しない場合や冬季低温時の凍結防止等、熱交換缶体の故障、損傷、劣化を予防するため、排水しておく必要が生じる。排水共通化手段を設けることで、回路毎に熱交換缶体に接続する入管と出管との間に共通の排水路を自在に構成し、これによって回路毎に入管と出管との排水を１つの作業で行うことができる。
特に第１の特徴によれば、直筒状本体を有することで、下端側の排水管部と途中の連通管部とが同じ直筒状本体の筒内に直線的に並んで構成されることになり、よって連通管部と排水管部との閉塞及び開放を１個の排水栓部材を用いて容易に行うことが可能となる。また連通管部の上下の位置に接続された入管と出管から連通管部に流出した水は、そのまま下方に落下して容易に排水管部から排水される。前記排水栓部材は、通常時は連通管部と排水管部とを閉塞させており、これによって入管と出管との連通を確実に遮断すると共に、入管、出管からの排水を確実に遮断する。また排水作業時には排水栓部材を操作することで、前記連通管部と排水管部の閉塞を解いて開放する。これによって入管内及び出管内の水が連通管部に流出し、さらに排水管部に流れて排出される。
また上記本発明の第２の特徴によれば、上記第１の特徴による作用効果に加えて、排水栓部材の連通管部閉塞部分に入管と出管との通路をつなぐリーク孔を設けているので、排水栓部材により連通管部が閉塞されている通常時においても、前記回路の入管と出管との通路をリーク孔を通じて僅かに連通した状態とすることができる。よって冬季等において、その回路本来の循環運転を行うことなく、凍結防止運転を熱交換缶体やその回りの短絡した循環回路で行うことができる。これによって特に熱交換缶体を屋外に設置する屋外設置型給湯装置における凍結防止の効果を発揮させることができる。
【０００７】
【発明の実施の形態】
図１は本発明の実施の形態例に係る給湯装置を示し、（Ａ）は正面図、（Ｂ）は一部断面した側面図である。図２は図１に示す給湯装置に用いられる要部の断面図である。図３は本発明の給湯装置に用いられる排水共通化手段の他の例を示す断面図である。図４は屋内設置型の給湯装置の例を示す概略配管図である。図５は屋外設置型の給湯装置の例を示す概略配管図である。
【０００８】
図４を参照して、屋内設置型の給湯装置の場合には、家屋を外部から仕切る壁Ｗより内側（図４では壁Ｗの内側面）に給湯装置の熱交換缶体10が設置され、該熱交換缶体10に対して給湯回路20が接続され、また必要に応じて、暖房循環回路30、風呂追い焚き循環回路40が接続される。
また図５に示すように、屋外設置型の給湯装置の場合には、家屋を外部から仕切る壁Ｗよりも外側（図５では壁Ｗの外側面）に給湯装置の熱交換缶体10が設置され、該熱交換缶体10に対して給湯回路20や、暖房循環回路30、風呂追い焚き循環回路40が接続される。
前記給湯回路20は、熱交換缶体10への給水管である入管21と熱交換缶体10からの出湯管である出管22とからなる。
また前記暖房循環回路30は、放熱器33で放熱された温水を熱交換缶体10へ戻す入管31と熱交換缶体10で加熱された温水を放熱器33へ送る出管32とからなる。暖房循環回路30には熱動弁34が通常設けられており、一定温度以上、例えば10℃以上では閉止するようにされている。
また前記風呂追い焚き循環回路40は、浴槽43から浴槽水を熱交換缶体10に戻す入管41と熱交換缶体10から加熱された温水を浴槽43に向けて送る出管42とからなる。
前記給湯回路20、暖房循環回路30、風呂追い焚き循環回路40には、通常において、その回路途中に１つ以上の何らかの開閉弁が設けられており、それらの回路における本来の運転、例えば給湯回路20であれば給湯運転、暖房循環回路30であれば暖房運転、風呂追い焚き循環回路40であれば追い焚き運転が行われる場合には、その運転の開始と共に回路が開放されて連通し、運転が停止されると前記回路が閉止されるようになっている。
【０００９】
前記熱交換缶体10は、瞬間式の熱交換缶体としてもよいし、所謂セミ貯湯式の熱交換缶体としてもよいし、貯湯式の熱交換缶体としてもよい。また加熱手段としてはガスバーナを用いてもよいし、石油バーナを用いてもよい。また必要に応じて電気加熱を行うものであってもよい。
前記瞬間式の熱交換缶体を用いる場合は、熱交換缶体10の内部にそれぞれ給湯回路20、暖房循環回路30、風呂追い焚き循環回路40の図示しない熱交換コイルをそれぞれ配置する。また給湯回路20の加熱をセミ貯湯式や貯湯式とする場合には、暖房循環回路30や風呂追い焚き循環回路40については、それぞれの熱交換コイルを給湯回路20のセミ貯湯槽や貯湯槽に通して瞬間加熱とすることができる。
【００１０】
熱交換缶体10は本体部11と配管接続部12とからなり、本体部11内には前記したガスや石油等によるバーナと、前記した瞬間式熱交のための熱交換コイル或いはセミ貯湯槽、或いは貯湯槽が配置されている。一方、本体10の下に設けられた配管接続部12には、前記給湯回路20の入管21と出管21、暖房循環回路30の入管31と出管32、風呂追い焚き循環回路40の入管41と出管42が、それぞれ熱交換缶体10の本体部11側と接続して配置されると共に、各回路20、30、40毎に排水共通化手段50、50、50が設けられている。また暖房循環回路30と風呂追い焚き循環回路40については回路循環用の循環ポンプ60、60が設けられている。給湯回路20については上水道からの水圧が加わっているので、ポンプは不要である。
【００１１】
前記排水共通化手段50は、給湯回路20において、入管21と出管22との間に介在して１つの共通の排水路51を構成するものである。同様に暖房循環回路30の入管31と出管32との間に介在し、また風呂追い焚き循環回路40の入管41と出管42との間に介在してそれぞれ１つの共通の排水路51を構成するものである。勿論、排水共通化手段50は、通常の運転時（排水を行う場合以外）には前記排水路51が入管21、31、41や出管22、32、42に対して閉塞状態となる構成となっており、また通常の運転時には入管21、31、41を通る水流と出管22、32、42を通る水流とが原則として連通しない構成となされている。そして排水共通化手段50は、排水を行う際には各回路20、30、40において入管21、31、41及び出管22、32、42から排水路51への通路が開放されると共に排水路51自体の通路が外部へ開放される構成となされている。
尚、排水共通化手段50の排水路51が短い場合に排水チューブ70を取り付けて、配管接続部12の外へ排水できるようにすることができる（図１の（Ｂ）参照）。
【００１２】
図２を参照して、排水共通化手段50のより具体的な実施の態様例を説明する。この例では排水共通化手段50は直筒状本体52を有し、該直筒状本体52の下端側を排水管部52a とし、途中を連通管部52b としている。直筒状本体52の連通管部52b を挟んだ上側の側部には、入管（21、31、41）との接続管部53が取り付けられ、また直筒状本体52の上端部は入管（21、31、41）との接続口部52c として構成されている。一方、前記直筒状本体52の連通管部52b を挟んだ下側の側部には、出管（22、32、42）との接続管部54a 、54b が取り付けられている。
前記直筒状本体52に対しては排水栓部材55が下端側の排水管部52a から着脱自在に嵌め込まれる。排水栓部材55には、前記直筒状本体52の連通管部52b を閉塞するための連通管部閉塞栓55a と前記排水管部52a を入管（21、31、41）や出管（22、32、42）から閉塞するための排水管部閉塞栓55b 、55b が排水栓部材55の先端側のロッド部55c に構成されている。
また排水栓部材55の前記排水管部閉塞栓55b よりも下端側は筒状部55d とされ、該筒状部55d の上部に設けられた横孔55e で筒状部55d の外側面に連通している。この筒状部55d が上記した排水路51となる。
さらに排水栓部材55の筒状部55d の外側の一部に雄ねじ部55f が設けられている。
前記直筒状本体52のうち前記連通管部閉塞栓55a で閉塞される連通管部52b と、前記排水管部閉塞栓55b 、55b で閉塞される排水管部52a の部分は何れも内径を他よりも小さくしており、これによって前記各栓55a 、55b 、55b が閉塞位置から位置をずらされることで、それらの栓55a 、55b 、55b による閉塞が解かれるようになされている。
また前記直筒状本体52の排水管部52a の内壁には前記排水栓部材55の雄ねじ部55f と螺合する雌ねじ部52d が設けられている。
80は脱落防止ピンであり、排水栓部材55が直筒状本体52から脱落してしまうのを予防する。
【００１３】
前記排水栓部材55による直筒状本体52の閉塞及びその開放の動作を説明する。今、排水栓部材55を直筒状本体52にセットする場合、排水栓部材55をその先端の連通管部閉塞栓55a 側から直筒状本体52の下端側の排水管部52a 内に侵入させ、雄ねじ部55f を直筒状本体52の雌ねじ部52d に螺合させて、侵入止め部55g が排水管部52a の内壁の一部に当たって行き止まるまで螺合を進める。そして脱落防止ピン80を施す。前記行き止まった所で、排水栓部材55の連通管部閉塞栓55a が直筒状本体52の連通管部52b に達してこれを閉塞し、また排水管部閉塞栓55b がそれぞれ排水管部52a の対応する小内径部に達してこれを閉塞する。これによって、入管（21、31、41）側の通路と出管（22、32、42）側の通路との連通が遮断され、また排水管部52a への通路が閉塞された状態となる。通常時の運転はこの状態でなされる。
次に、熱交換缶体10内の残留水や入管（21、31、41）、出管（22、32、42）内の水を排出する場合、排水栓部材55の前記雄ねじ部55f による直筒状本体52の雌ねじ部52d への螺合を解くことで、排水栓部材55が後退し、これによって連通管部閉塞栓55a が連通管部52b からより内径の大きい所に外れ、また排水管部閉塞栓55b が排水管部52a のより内径の大きい所に外れる。排水栓部材55そのものは脱落防止ピン80によって直筒状本体52から脱落してしまうのが防止される。熱交換缶体10内や入管（21、31、41）内の残留水は入管（21、31、41）から連通管部52b に入り、直筒状本体52を下り、更に直筒状本体52内から排水栓部材55の横孔55e を通って排水栓部材55の筒状部55d 内に入り、外部に排出される。また熱交換缶体10内や出管（22、32、42）内の残留水は出管（22、32、42）からそれに接続された直筒状本体52内に入り、下方へ下って、横孔55e から排水栓部材55の筒状部55d 内に入り、外部に排出される。
給湯回路20や暖房循環回路30、風呂追い焚き循環回路40の回路毎に入管と出管の２つの管路内の残留水を１つの排水共通化手段50によって１回の作業で排水することができる。
【００１４】
前記直筒状本体52は必ずしも直筒状である必要はなく、曲がっていても可能である。但し直筒状の場合は、排水栓部材55の構成等を含め、全体の構成をシンプルにすることができる。
また排水共通化手段50は必ずしも直筒状本体52等、１本の筒体を主たる構成として設ける必要はない。要するに入管（21、31、41）と出管（22、32、43）とを連通させる連通管部52b と該連通管部52b に連通する排水管部52a を有し、且つ連通管部52b と排水管部52a とを開放自在に閉塞する１つの排水栓部材55が有ればよく、連通管部52b や排水管部52a や排水栓部材55の形状が特に限定される必要はない。
また直筒状本体52に対して、必ずしも前記接続管部53を必要としない。入管（21、31、41）を直接的に直筒状本体52に接続するようにしてもよいのである。同様に接続管部54a 、54b についても、それらを直筒状本体52に取り付ける代わりに、出管（22、32、42）を直接的に直筒状本体52に接続するようにしてもよい。その他、図２においては、直筒状本体52の連通管部52b を挟む上側に入管（2 、31、41）を接続するようにし、下側に出管（22、32、42）を接続するようにしているが、逆であってもよい。
【００１５】
図３に排水共通化手段50の変形例を示す。この例は屋外設置型の給湯装置における凍結防止に効果を奏する。即ち、図４に示す屋内設置型の給湯装置においては、熱交換缶体10も各回路20、30、40も屋内に設置されるため、冬季においても殆ど凍結予防の必要性がなかった。しかしながら図５に示すような屋外設置型の給湯装置では、熱交換缶体10が屋外に設置されるため、例えば屋外温度が非常に低くなる場合には屋外の熱交換缶体10やその周辺の配管の凍結を防止する必要がある。にもかかわらず、例えば屋内に配設される暖房循環回路30等は室内温度がある程度以下に低下しないとその熱動弁34等を開放して暖房循環を行うことをしないので、結局、屋外設置型の給湯装置においては、屋内の各回路が運転停止状態で回路が閉塞状態となっている場合であっても、それらとは独立した凍結防止の循環運転を熱交換缶体10の回りで行う必要が生じるのである。
【００１６】
図３に示す排水共通化手段50においては、排水栓部材55により直筒状本体52の連通管部52b 及び排水管部52a を閉塞状態とした状態において入管（31、41）側と出管（32、42）側との通路をつなぐリーク孔55h を設けている。他の構成は既述した構成と同じである。
前記リーク孔55h は、排水栓部材55の連通管部閉塞栓55a と排水管部閉塞栓55b との間の連結ロッド部55c に軸に直角方向に貫通する細孔と該孔から軸方向先端に延びて連通管部閉塞栓55a 先端に貫通して開放する細孔とで構成されている。
前記のようにリーク孔55h を設けた排水共通化手段50を暖房循環回路30や風呂追い焚き循環回路40の入管（31、41）と出管（32、42）との間に介在させて設けることで、屋外温度が低下した場合には、排水共通化手段50を取り付けたまま、しかも屋内の回路等による循環運転を行うことなく、循環ポンプ60を凍結防止運転モード用の弱運転で運転開始するだけで、熱交換缶体10内の水が出管（32、42）から排水共通化手段のリーク孔55h を通って入管（31、41）側へ循環し、熱交換缶体10やその他の屋外設置配管部の凍結が防止される。
【００１７】
【発明の効果】
本発明は以上の構成よりなり、請求項１に記載の給湯装置によれば、熱交換缶体に接続される回路に対して、該回路の熱交換缶体に対する入管と出缶との間に介在して共通の排水路を自在に構成する排水共通化手段を設けたので、熱交換缶体に接続する各回路の入管と出管からなる２つの管路に対して１個の排水路を設けるだけでよく、よって多数の入管と出管が配設せられる給湯装置において、半数の排水設備で全管の排水を行うことができ、作業及び配管を大きく簡素化することができる。
特に請求項１に記載の給湯装置によれば、排水共通化手段は直筒状本体を有し、該直筒状本体の下端側を排水管部とすると共に途中を連通管部とし、連通管部を挟んだ上下の位置でそれぞれ入管と出管に接続されているので、１本の直筒状本体に入管と出管とを接続することで、連通管部や排水管部を同じ１本の筒に直線的に並んで構成でき、よって連通管部や排水管部の閉塞及び開放を１個の排水栓部材を用いて容易に行える。加えて、入管と出管からの水を直筒状本体内を下方にそのまま直線的に落下させて排出させることができる。
また請求項２に記載の給湯装置によれば、上記請求項１に記載の構成による効果に加えて、排水栓部材のうち連通管部閉塞部分には、入管と出管との通路をつなぐリーク孔を設けているので、排水栓部材により連通管部が閉塞されている通常時においても、回路の入管と出管との通路をリーク孔を通じて僅かに連通した状態とすることができ、よって冬季等において、その回路本来の循環運転を行うことなく、凍結防止運転を熱交換缶体やその回りの短絡した循環回路で行うことができる。これによって特に熱交換缶体を屋外に設置する屋外設置型給湯装置における凍結防止の効果を発揮させることができる。
【図面の簡単な説明】
【図１】本発明の実施の形態例に係る給湯装置を示し、（Ａ）は正面図、（Ｂ）は一部断面した側面図である。
【図２】図１に示す給湯装置に用いられる要部の断面図である。
【図３】本発明の給湯装置に用いられる排水共通化手段の他の例を示す断面図である。
【図４】屋内設置型の給湯装置の例を示す概略配管図である。
【図５】屋外設置型の給湯装置の例を示す概略配管図である。
【符号の説明】
10 熱交換缶体
20 給湯回路
21 入管
22 出管
30 暖房循環回路
31 入管
32 出管
40 風呂追い焚き循環回路
41 入管
42 出管
50 排水共通化手段
51 排水路
52 直筒状本体
52a 排水管部
52b 連通管部
55 排水栓部材
55h リーク孔[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot water supply apparatus.
[0002]
[Prior art]
There are many hot water supply devices with a multi-function hot water supply function in recent years, and therefore, in addition to the basic hot water supply circuit, there are many pipes such as a circulation circuit for bathing and a circuit for heating operation, Connected to and from the heat exchange can body. Since there are two circuit tubes in and out of the heat exchange can body, each circuit has a considerable number of tubes.
[0003]
[Problems to be solved by the invention]
However, in the conventional hot water supply apparatus described above, for example, when it is not used for a long period of time or to prevent freezing at low temperatures in winter, it is necessary to drain the water in the pipe, but conventionally, a drain plug is generally provided for each pipe. The pipe was drained by removing the drain plug as needed. For this reason, there has been a problem that the drain plug removal work has become several places, and the work is troublesome and troublesome.
[0004]
Then, this invention makes it a subject to provide the hot water supply apparatus which can eliminate the problem of the said conventional hot water supply apparatus, reduces the number of required drain plugs, and can perform drainage work easily.
It is another object of the present invention to provide a hot water supply apparatus that can ensure circulation for freezing prevention operation when the number of drain plugs is made common for each circuit and the number is reduced.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the hot water supply apparatus of the present invention includes a hot water supply circuit in which a water inlet pipe and a hot water outlet pipe are connected to at least a heat exchange can body, and in addition, a bath recirculation circuit, a heating circuit, and the like A hot water supply apparatus in which the circulation circuit of the circuit is connected to a heat exchange can body as required, and for a circuit connected to the heat exchange can body, an inlet pipe and an outlet pipe for the heat exchange can body of the circuit, Provided with a common drainage means that freely configures a common water distribution channel , the drainage common means has a straight cylindrical body, and the lower end side of the straight cylindrical main body is connected to the drain pipe portion. In addition, one drainage that is connected to the inlet pipe and the outlet pipe at the upper and lower positions sandwiching the communication pipe part and that freely closes the communication pipe part and the drain pipe part, with the middle being a communication pipe part. The first feature is to have a plug member .
The hot water supply device of the present invention, in addition to the first feature, the communication pipe obstruction portion of the discharge faucet members, first that is provided with a leak hole for connecting the passages between the pipe and the extraction pipe It has 2 features.
[0006]
According to the first feature of the present invention, in the hot water supply circuit and other circuits connected to the heat exchange can body by an inlet pipe and an outlet pipe, water entering the heat exchange can body from the inlet pipe is heated there. The hot water is discharged to the outlet pipe.
The water in the heat exchange can needs to be drained in order to prevent failure, damage or deterioration of the heat exchange can, such as freezing at low temperatures in winter or when not used for a long time. By providing a common drainage system, a common drainage channel can be freely configured between the inlet and outlet pipes connected to the heat exchange can body for each circuit, thereby draining the inlet and outlet pipes for each circuit. It can be done in one operation.
In particular, according to the first feature, by having the straight cylindrical main body, the drain pipe portion on the lower end side and the intermediate communication pipe portion are configured to be linearly arranged in the cylinder of the same straight cylindrical main body. Thus, the communication pipe part and the drain pipe part can be easily closed and opened using one drain plug member. Further, the water that has flowed out of the inlet and outlet pipes connected to the upper and lower positions of the communication pipe section into the communication pipe section falls down as it is and is easily drained from the drain pipe section. The drain plug member normally closes the communication pipe part and the drain pipe part, thereby reliably blocking the communication between the inlet pipe and the outlet pipe, and reliably blocking the drainage from the inlet pipe and the outlet pipe. To do. Further, by operating the drain plug member during drainage work, the communication pipe part and the drain pipe part are unblocked and opened. As a result, the water in the inlet pipe and the outlet pipe flows out to the communication pipe section, and further flows to the drain pipe section and is discharged.
Further, according to the second feature of the present invention, in addition to the function and effect of the first feature, a leak hole for connecting the passage between the inlet pipe and the outlet pipe is provided in the communication pipe portion blocking portion of the drain plug member. Therefore, even when the communication pipe portion is closed by the drain plug member, the passage between the inlet pipe and the outlet pipe of the circuit can be slightly communicated through the leak hole. In winter season or the like by, without performing the circuit original circulation operation, the antifreezing operation may be carried out in a circulating circuit in which short-circuiting of the heat exchanger can body and around it. Thereby, the effect of preventing freezing can be exhibited particularly in an outdoor installation type hot water supply apparatus in which the heat exchange can body is installed outdoors.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a hot water supply apparatus according to an embodiment of the present invention, in which (A) is a front view and (B) is a partially sectional side view. FIG. 2 is a cross-sectional view of a main part used in the hot water supply apparatus shown in FIG. FIG. 3 is a cross-sectional view showing another example of drainage common means used in the hot water supply apparatus of the present invention. FIG. 4 is a schematic piping diagram showing an example of an indoor installation type hot water supply apparatus. FIG. 5 is a schematic piping diagram showing an example of an outdoor installation type hot water supply apparatus.
[0008]
Referring to FIG. 4, in the case of an indoor installation type hot water supply device, heat exchange can body 10 of the hot water supply device is installed on the inner side (inner side surface of wall W in FIG. 4) from wall W partitioning the house from the outside, A hot water supply circuit 20 is connected to the heat exchange can body 10, and a heating circulation circuit 30 and a bath recirculation circuit 40 are connected as necessary.
Further, as shown in FIG. 5, in the case of an outdoor installation type hot water supply apparatus, the heat exchange can 10 of the hot water supply apparatus is installed outside the wall W that partitions the house from the outside (in FIG. 5, the outer surface of the wall W). Then, a hot water supply circuit 20, a heating circulation circuit 30, and a bath recirculation circuit 40 are connected to the heat exchange can body 10.
The hot water supply circuit 20 includes an inlet pipe 21 that is a water supply pipe to the heat exchange can body 10 and an outlet pipe 22 that is a hot water discharge pipe from the heat exchange can body 10.
The heating circuit 30 includes an inlet pipe 31 for returning the hot water radiated by the radiator 33 to the heat exchange can body 10 and an outlet pipe 32 for sending the hot water heated by the heat exchange can body 10 to the radiator 33. A heating valve 34 is usually provided in the heating circulation circuit 30 and is closed at a certain temperature or higher, for example, 10 ° C. or higher.
The bath recirculation circuit 40 includes an inlet pipe 41 that returns bathtub water from the bathtub 43 to the heat exchange can body 10 and an outlet pipe 42 that sends hot water heated from the heat exchange can body 10 toward the bathtub 43.
The hot water supply circuit 20, the heating circulation circuit 30, and the bath recirculation circuit 40 are usually provided with one or more on / off valves in the middle of the circuit, and the original operation in these circuits, for example, the hot water supply circuit If it is 20, hot water supply operation, heating circulation circuit 30 is heating operation, and bath recirculation circuit 40 is reheating operation, the circuit is opened and communicated with the start of the operation. When is stopped, the circuit is closed.
[0009]
The heat exchange can body 10 may be an instantaneous heat exchange can body, a so-called semi hot water storage type heat exchange can body, or a hot water storage type heat exchange can body. Further, a gas burner or an oil burner may be used as the heating means. Moreover, you may perform an electric heating as needed.
When the instantaneous heat exchange can body is used, heat exchange coils (not shown) of the hot water supply circuit 20, the heating circulation circuit 30, and the bath recirculation circuit 40 are arranged inside the heat exchange can body 10, respectively. When heating the hot water supply circuit 20 to a semi-hot water storage type or hot water storage type, for the heating circulation circuit 30 and the bath recirculation circuit 40, the respective heat exchange coils are connected to the semi hot water storage tank and hot water storage tank of the hot water supply circuit 20. It can be instantaneous heating through.
[0010]
The heat exchange can body 10 includes a main body portion 11 and a pipe connection portion 12. The main body portion 11 includes a burner made of the gas, oil, etc., and a heat exchange coil or a semi-hot water tank for the instantaneous heat exchange described above. Alternatively, a hot water tank is arranged. On the other hand, the pipe connection part 12 provided under the main body 10 includes an inlet pipe 21 and an outlet pipe 21 of the hot water supply circuit 20, an inlet pipe 31 and an outlet pipe 32 of the heating circulation circuit 30, and an inlet pipe 41 of the bath recirculation circuit 40. And the outlet pipe 42 are respectively connected to the main body 11 side of the heat exchange can body 10, and the drainage common means 50, 50, 50 is provided for each circuit 20, 30, 40. The heating circulation circuit 30 and the bath recirculation circuit 40 are provided with circulation pumps 60 and 60 for circuit circulation. Since the water pressure from the water supply is applied to the hot water supply circuit 20, a pump is unnecessary.
[0011]
The drainage common means 50 constitutes one common drainage channel 51 interposed between the inlet pipe 21 and the outlet pipe 22 in the hot water supply circuit 20. Similarly, a common drain 51 is interposed between the inlet pipe 31 and the outlet pipe 32 of the heating circulation circuit 30 and between the inlet pipe 41 and the outlet pipe 42 of the bath recirculation circuit 40. It constitutes. Of course, the drainage common means 50 has a configuration in which the drainage channel 51 is closed with respect to the inlet pipes 21, 31, 41 and the outlet pipes 22, 32, 42 during normal operation (except when draining). In addition, during normal operation, the water flow passing through the inlet pipes 21, 31, 41 and the water flow passing through the outlet pipes 22, 32, 42 are configured not to communicate in principle. When the drainage common means 50 performs drainage, the passages from the inlet pipes 21, 31, 41 and the outlet pipes 22, 32, 42 to the drainage channel 51 are opened in each circuit 20, 30, 40 and the drainage channel. 51 is configured such that its own passage is open to the outside.
In addition, when the drainage channel 51 of the drainage common means 50 is short, the drainage tube 70 can be attached so that the drainage can be performed outside the pipe connection part 12 (see FIG. 1B).
[0012]
With reference to FIG. 2, the example of the more concrete embodiment of the waste_water | drain common means 50 is demonstrated. In this example, the drainage common means 50 has a straight cylindrical main body 52, the lower end side of the straight cylindrical main body 52 is a drain pipe portion 52a, and the middle is a communication pipe portion 52b. A connecting pipe portion 53 to the inlet pipe (21, 31, 41) is attached to the upper side portion across the communication pipe portion 52b of the straight cylindrical main body 52, and the upper end portion of the straight cylindrical main body 52 is connected to the inlet pipe (21, 31 and 41) as a connection port portion 52c. On the other hand, connecting pipe portions 54a and 54b to the outlet pipes (22, 32, 42) are attached to the lower side portion of the straight cylindrical main body 52 across the communication pipe portion 52b.
A drain plug member 55 is detachably fitted to the straight cylindrical main body 52 from a drain pipe portion 52a on the lower end side. The drain plug member 55 includes a communication pipe portion blocking plug 55a for closing the communication pipe portion 52b of the straight cylindrical main body 52 and the drain pipe portion 52a, and an inlet pipe (21, 31, 41) and an outlet pipe (22, 32). 42), the drain pipe block plugs 55b and 55b for blocking are formed on the rod section 55c on the distal end side of the drain plug member 55.
The drain plug member 55 has a cylindrical portion 55d on the lower end side of the drain pipe portion closing plug 55b, and communicates with the outer surface of the cylindrical portion 55d through a horizontal hole 55e provided at the upper portion of the cylindrical portion 55d. ing. This cylindrical portion 55d becomes the drainage channel 51 described above.
Further, a male screw portion 55f is provided on a part of the outside of the cylindrical portion 55d of the drain plug member 55.
Of the straight cylindrical main body 52, the communication pipe part 52b closed by the communication pipe part closing plug 55a and the drain pipe part 52a closed by the drain pipe part closing plugs 55b and 55b both have inner diameters than others. Accordingly, the plugs 55a, 55b and 55b are displaced from the closed position so that the plugs 55a, 55b and 55b are unblocked.
Further, a female threaded portion 52d that engages with a male threaded portion 55f of the drain plug member 55 is provided on the inner wall of the drainage pipe portion 52a of the straight cylindrical main body 52.
Reference numeral 80 denotes a drop prevention pin, which prevents the drain plug member 55 from dropping from the straight cylindrical main body 52.
[0013]
The operation of closing and opening the straight cylindrical main body 52 by the drain plug member 55 will be described. Now, when the drain plug member 55 is set on the straight cylindrical body 52, the drain plug member 55 is inserted into the drain pipe section 52a on the lower end side of the straight cylindrical body 52 from the communication pipe block plug 55a side at the tip thereof, and the male screw The portion 55f is screwed into the female screw portion 52d of the straight cylindrical main body 52, and the screwing is advanced until the intrusion preventing portion 55g hits a part of the inner wall of the drain pipe portion 52a and stops. Then, a drop prevention pin 80 is applied. At the place where the dead end is reached, the communication pipe part blocking plug 55a of the drain plug member 55 reaches the communication pipe part 52b of the straight cylindrical main body 52 and closes it, and the drain pipe part blocking plug 55b is connected to the drain pipe part 52a. The corresponding small inner diameter is reached and closed. As a result, the communication between the passage on the inlet pipe (21, 31, 41) side and the passage on the outlet pipe (22, 32, 42) side is blocked, and the passage to the drain pipe portion 52a is blocked. Normal operation is performed in this state.
Next, when the residual water in the heat exchange can body 10 and the water in the inlet pipe (21, 31, 41) and outlet pipe (22, 32, 42) are discharged, the straight cylinder by the male screw portion 55f of the drain plug member 55 By unscrewing the main body 52 from the female threaded portion 52d, the drain plug member 55 is retracted, so that the communication tube portion blocking plug 55a is disengaged from the communication tube portion 52b to a place having a larger inner diameter, and the drain tube portion The blocking plug 55b comes off at a location where the inner diameter of the drain pipe portion 52a is larger. The drain plug member 55 itself is prevented from dropping from the straight cylindrical main body 52 by the drop prevention pin 80. Residual water in the heat exchange can 10 or in the inlet pipe (21, 31, 41) enters the communication pipe portion 52b from the inlet pipe (21, 31, 41), descends the straight cylindrical main body 52, and further from the straight cylindrical main body 52 The water enters the cylindrical portion 55d of the drain plug member 55 through the horizontal hole 55e of the drain plug member 55 and is discharged to the outside. Residual water in the heat exchange can 10 or the outlet pipe (22, 32, 42) enters the straight cylindrical main body 52 connected to the outlet pipe (22, 32, 42), and goes down to the side. The hole 55e enters the cylindrical portion 55d of the drain plug member 55 and is discharged outside.
For each of the hot water supply circuit 20, the heating circulation circuit 30, and the bath recirculation circuit 40, residual water in the two pipes of the inlet pipe and the outlet pipe can be drained by one drain common means 50 in one operation. it can.
[0014]
The straight cylindrical main body 52 does not necessarily have a straight cylindrical shape, and can be bent. However, in the case of a straight cylinder, the entire configuration including the configuration of the drain plug member 55 can be simplified.
Further, the drainage common means 50 does not necessarily have to be provided with a single cylindrical body as a main component, such as the straight cylindrical main body 52. In short, it has a communication pipe part 52b for connecting the inlet pipe (21, 31, 41) and the outlet pipe (22, 32, 43), and a drain pipe part 52a connected to the communication pipe part 52b, and a communication pipe part 52b. It is only necessary to have one drain plug member 55 that freely closes the drain pipe portion 52a, and the shapes of the communication pipe portion 52b, the drain pipe portion 52a, and the drain plug member 55 are not particularly limited.
Further, the connecting pipe portion 53 is not necessarily required for the straight cylindrical main body 52. The inlet pipe (21, 31, 41) may be directly connected to the straight cylindrical main body 52. Similarly, regarding the connecting pipe portions 54a and 54b, the outlet pipes (22, 32, 42) may be directly connected to the straight cylindrical main body 52 instead of attaching them to the straight cylindrical main body 52. In addition, in FIG. 2, the inlet pipe (2, 31, 41) is connected to the upper side of the communication pipe portion 52b of the straight cylindrical main body 52, and the outlet pipe (22, 32, 42) is connected to the lower side. However, the reverse is also possible.
[0015]
FIG. 3 shows a modification of the wastewater standardization means 50. This example is effective in preventing freezing in an outdoor installation type hot water supply apparatus. That is, in the indoor installation type hot water supply apparatus shown in FIG. 4, since the heat exchange can body 10 and the circuits 20, 30, 40 are both installed indoors, there is almost no necessity for prevention of freezing even in winter. However, in the outdoor installation type hot water supply apparatus as shown in FIG. 5, since the heat exchange can 10 is installed outdoors, for example, when the outdoor temperature becomes very low, the outdoor heat exchange can 10 and its surroundings It is necessary to prevent the piping from freezing. Nevertheless, for example, the heating circulation circuit 30 installed indoors does not perform heating circulation by opening the thermal valve 34 etc. unless the room temperature drops below a certain level. In the hot water supply device of the type, even if each circuit in the indoor is in a stopped state and the circuit is in a closed state, the freezing prevention circulation operation independent of them is performed around the heat exchange can body 10 The need arises.
[0016]
In the drainage common means 50 shown in FIG. 3, the inlet pipe (31, 41) side and the outlet pipe (32) in the state where the communication pipe portion 52b and the drain pipe portion 52a of the straight cylindrical main body 52 are closed by the drain plug member 55. 42) A leak hole 55h connecting the passage with the side is provided. Other configurations are the same as those already described.
The leak hole 55h includes a through hole perpendicular to the axis of the connecting rod portion 55c between the communication pipe portion blocking plug 55a and the drain pipe portion closing plug 55b of the drain plug member 55, and an axial end from the hole. The communication pipe portion closing plug 55a extends and is formed with a fine hole penetrating and opening at the tip.
As described above, the drainage common means 50 provided with the leak hole 55h is provided between the inlet pipe (31, 41) and the outlet pipe (32, 42) of the heating circulation circuit 30 or the bath recirculation circuit 40. Thus, when the outdoor temperature drops, the circulation pump 60 starts operating in a weak operation for the freeze prevention operation mode without attaching the drainage common means 50 and without performing the circulation operation by an indoor circuit or the like. The water in the heat exchange can body 10 is circulated from the outlet pipe (32, 42) to the inlet pipe (31, 41) side through the leak hole 55h of the drainage common means, and the heat exchange can body 10 and others. Freezing of the outdoor installation piping section is prevented.
[0017]
【The invention's effect】
This invention consists of the above structure, and according to the hot water supply apparatus of Claim 1, between the inlet_tube | pipe with respect to the heat exchange can body of this circuit, and a can, with respect to the circuit connected to a heat exchange can body Since a common drainage means is provided to freely configure a common drainage channel, one drainage channel is provided for two pipes consisting of an inlet pipe and an outlet pipe of each circuit connected to the heat exchange can body. Therefore, in a hot water supply apparatus in which a large number of inlet and outlet pipes are provided, all the pipes can be drained by half of the drainage facilities, and operations and piping can be greatly simplified.
In particular, according to the hot water supply apparatus of claim 1, the drainage common means has a straight cylindrical main body, the lower end side of the straight cylindrical main body is a drainage pipe part, and the middle is a communication pipe part, and the communication pipe part Since the pipe is connected to the inlet and outlet pipes at the upper and lower positions across the tube, connecting the inlet and outlet pipes to one straight cylindrical body allows the same pipe and drain pipe to be connected to the same pipe. Therefore, the communication pipe part and the drain pipe part can be easily closed and opened by using one drain plug member. In addition, the water from the inlet and outlet pipes can be discharged straightly as it is in the straight cylindrical body downward.
Further, according to the hot water supply apparatus of the second aspect , in addition to the effect of the configuration of the first aspect , the leak that connects the passage between the inlet pipe and the outlet pipe is connected to the communication pipe portion closed portion of the drain plug member. since is provided a hole, even in normal state where communication pipe portion is closed by the discharge faucet member may be a state in which through slightly communication passage between pipe circuit decane through the leak hole, by Te in winter season or the like, without performing the circuit original circulation operation, the antifreezing operation may be carried out in a circulating circuit in which short-circuiting of the heat exchanger can body and around it. Thereby, the effect of preventing freezing can be exhibited particularly in an outdoor installation type hot water supply apparatus in which the heat exchange can body is installed outdoors.
[Brief description of the drawings]
1A and 1B show a hot water supply apparatus according to an embodiment of the present invention, in which FIG. 1A is a front view and FIG.
FIG. 2 is a cross-sectional view of a main part used in the hot water supply apparatus shown in FIG.
FIG. 3 is a cross-sectional view showing another example of drainage common means used in the hot water supply apparatus of the present invention.
FIG. 4 is a schematic piping diagram showing an example of an indoor installation type hot water supply apparatus.
FIG. 5 is a schematic piping diagram showing an example of an outdoor installation type hot water supply apparatus.
[Explanation of symbols]
10 Heat exchange can
20 Hot water supply circuit
21 Immigration
22 Outlet
30 Heating circuit
31 Immigration
32 Outlet
40 Bath recirculation circuit
41 Immigration
42 Outlet
50 Wastewater standardization
51 Drainage channel
52 Straight cylindrical body
52a Drain pipe section
52b Communication pipe
55 Drain plug member
55h Leak hole

Claims

At least a hot water supply circuit is formed by connecting a water intake pipe and a hot water discharge pipe to the heat exchange can body, and in addition, a circulation circuit such as a bath recirculation circuit or a heating circulation circuit is connected to the heat exchange can body as necessary. A hot water supply apparatus comprising: a circuit connected to the heat exchange can body, and a common water distribution path freely configured by being interposed between an inlet pipe and an outlet pipe of the circuit with respect to the heat exchange can body In what provided wastewater standardization means to
The drainage common means has a straight cylindrical main body, the lower end side of the straight cylindrical main body is a drainage pipe part, and a midway is a communication pipe part, and the inlet pipe and the inlet pipe are respectively positioned above and below the communication pipe part. A hot water supply apparatus comprising a drain plug member connected to an outlet pipe and removably closing the communication pipe section and the drain pipe section .

2. The hot water supply apparatus according to claim 1, wherein a leak hole for connecting a passage between the inlet pipe and the outlet pipe is provided in a closed portion of the communication pipe portion of the drain plug member .