JP3655690B2

JP3655690B2 - Combustion equipment

Info

Publication number: JP3655690B2
Application number: JP07118596A
Authority: JP
Inventors: 武雄山口; 正徳榎本
Original assignee: 株式会社ガスター
Priority date: 1996-03-01
Filing date: 1996-03-01
Publication date: 2005-06-02
Anticipated expiration: 2016-03-01
Also published as: JPH09243166A

Description

【０００１】
【発明が属する技術分野】
本発明は、給湯、風呂追焚等、複数の用途に用いられる燃焼装置に関する。
【０００２】
【従来の技術】
従来、給湯と風呂追焚の両方を行える燃焼装置には、大別して２缶２水型と、１缶２水型がある。
２缶２水型の燃焼装置は、２つの独立した熱交換部と、これら熱交換部に対応する燃焼部とを備えている。各熱交換部は、多数の垂直フィンプレートと、これを貫通する通水管とを備えている。給湯を行う時には、一方の燃焼部で燃焼を行い、これに対応する熱交換部の通水管に給水管からの水を通して給湯を行う。風呂の追焚を行う時には、他方の燃焼部で燃焼を行い、これに対応する熱交換部の通水管に浴槽の水を通して追焚を行う。
上記２缶２水型の燃焼装置では、給湯と風呂追焚を互いに干渉させることなく実行でき、高性能である。しかし、２つの独立した燃焼ユニットを必要とするので装置が大型になるとともに高価であった。
【０００３】
ー般的な１缶２水型の燃焼装置は、給湯、風呂追焚に共通の熱交換部と燃焼部をーつずつ備えている。熱交換部は、多数のフィンプレートに、給湯用と風呂追焚用の２本の通水管を貫通することにより構成されている。これら２本の通水管は上下に別れて配置されている。この装置では、給湯、風呂追焚のいずれを実行する時でも、同じ燃焼部で燃焼が行われ、同じ熱交換部が加熱される。給湯が実行される時には、給水管からの水が熱交換部の給湯用通水管を通る。風呂追焚が実行される時には、浴槽からの水が熱交換部の風呂追焚用通水管を通る。
【０００４】
上記１缶２水型の燃焼装置は、給湯と風呂追焚を共通の構成要素で実行するため、構成が簡単になり安価となる。しかし、上記給湯と風呂追焚が互いに干渉し合う欠点があった。例えば、給湯だけが行われている時、風呂追焚用通水管に溜まっていた水も加熱される。同様に、風呂追焚だけが行われている時、給湯用通水管に溜まっている水も加熱される。そのため、熱交換効率が悪かった。また、風呂追焚時に給湯用通水管に溜まった水が加熱され続けて高温になると、給湯の初期に所望温度より高い湯が出ることがあった。
【０００５】
特公平２−１７７８４号公報には、本発明に最も近い構造を有する１缶２水型の燃焼装置が開示されている。この燃焼装置は、１つのフレーム内に、給湯と風呂追焚のための熱交換部が、それぞれ左右に別れて配置されており、これら熱交換部に対応する燃焼部がその真下に配置されている。この構成では、給湯と風呂追焚の相互干渉が小さくなり、上述した２缶２水型に近い性能となるにも拘わらず、２つの熱交換部が１つのフレーム内に収まるため、２缶２水型に比べて小型で安価である。
【０００６】
【発明が解決しようとする課題】
しかし、上記公報の装置では、給湯用の熱交換部と風呂追焚用の熱交換部が接近した関係にあるため、給湯側を停止した状態で風呂の追焚を行っている場合、風呂追焚用燃焼部の火炎にあぶられて、給湯用の熱交換部の通水管に滞留している水が加熱され、次に給湯を開始した際に、開栓直後に高温の湯が出る可能性があった。
【０００７】
【課題を解決するための手段】
請求項１の発明に係わる燃焼装置は、ー方向に並べて配置された第１，第２の少なくとも２つの燃焼部と、これら燃焼部の上方に配置された熱交換部とを備え、上記熱交換部は、上記第１，第２の燃焼部の真上にそれぞれ配置された第１、第２の少なくとも２つの領域を共通のフレーム内に有し、上記熱交換部の第１，第２の領域は、これら領域の並び方向に延びるとともにこの並び方向と直交する方向に並べられた多数のフィンプレートと、互いに別系統をなす第１，第２の系統の通水管をそれぞれ有し、各系統の通水管は、上記フィンプレートを貫通し且つ上記領域の並び方向に配列された複数の直管部を有し、上記第１系統の通水管の入口端が給水管に接続され、出口端が給湯管に接続されることにより、熱交換部の第１領域およびこれに対応する第１燃焼部が給湯用に提供され、上記第１，第２領域の境界の近傍において、第１系統の通水管の直管部の少なくとも一つと第２系統の通水管の直管部の少なくとも一つがその長手方向に沿って互いに接しており、しかも、上記の互いに接した２つの直管部が、給湯用の第１領域に配設され、上記の互いに接した２つの直管部は、上下に重ねられており、下側に第１系統の直管部，上側に第２系統の直管部が配置されていることを特徴とする。
【０００９】
請求項２の発明は、請求項１に記載の燃焼装置において、上記第２系統の通水管の入口端が、浴槽からの復路管に接続され、出口端が浴槽への往路管にそれぞれ接続されることにより、熱交換部の第２領域およびこれに対応する第２燃焼部が風呂追焚用に提供されることを特徴とする。
請求項３の発明に係わる燃焼装置は、ー方向に並べて配置された第１，第２の少なくとも２つの燃焼部と、これら燃焼部の上方に配置された熱交換部とを備え、上記熱交換部は、上記第１，第２の燃焼部の真上にそれぞれ配置された第１、第２の少なくとも２つの領域を共通のフレーム内に有し、上記熱交換部の第１，第２の領域は、これら領域の並び方向に延びるとともにこの並び方向と直交する方向に並べられた多数のフィンプレートと、互いに別系統をなす第１，第２の系統の通水管をそれぞれ有し、各系統の通水管は、上記フィンプレートを貫通し且つ上記領域の並び方向に配列された複数の直管部を有し、上記第１，第２領域の境界の近傍において、第１系統の通水管の直管部の少なくとも一つと第２系統の通水管の直管部の少なくとも一つがその長手方向に沿って互いに接しており、上記の互いに接した２つの直管部のうち、少なくとも第２系統に属する直管部は、この第２系統の通水管の入口端に最も近いものであることを特徴とする。
請求項４の発明は、請求項３に記載の燃焼装置において、上記の互いに接した２つの直管部のうち第１系統に属する直管部も、この第１系統の通水管の入口端に最も近いものであることを特徴とする。
【００１０】
請求項５の発明に係わる燃焼装置は、ー方向に並べて配置された第１，第２，第３の燃焼部と、これら燃焼部の上方に配置された熱交換部とを備え、上記熱交換部は、上記第１，第２，第３の燃焼部の真上にそれぞれ配置された第１、第２，第３の領域を共通のフレーム内に有し、上記第３領域は、第２領域の反対側において第１領域に隣接し、上記熱交換部の第１，第２，第３の領域は、これら領域の並び方向に延びるとともにこの並び方向と直交する方向に並べられた多数のフィンプレートと、互いに別系統をなす第１，第２，第３の系統の通水管をそれぞれ有し、各系統の通水管は、上記フィンプレートを貫通し且つ上記領域の並び方向に配列された複数の直管部を有し、上記第１，第２領域の境界の近傍において、第１系統の通水管の直管部の少なくとも一つと第２系統の通水管の直管部の少なくとも一つがその長手方向に沿って互いに接しており、上記第１，第３領域の境界の近傍において、第１系統の通水管の直管部の少なくとも一つと第３系統の通水管の直管部の少なくとも一つがその長手方向に沿って互いに接していることを特徴とする。
【００１１】
【発明の実施の形態】
以下、本発明の一実施形態を図面を参照しながら説明する。図１は、給湯と風呂追焚の２つの機能を有する１缶２水型の燃焼装置を示す。この燃焼装置は、排気ユニット１０と、熱交換ユニット２０と、バーナユニット３０と、ファン４０とを上から順に連接することにより構成されている。
【００１２】
バーナユニット３０は、上端が開口した箱形状のフレーム３１と、このフレーム３１内に収容された多数のエレメント群からなるバーナ３２とを備えている。フレーム３１の底壁に上記ファン４０が取り付けられている。バーナ３２は、２つの領域に分けられ、それぞれが給湯用燃焼部３２ａと追焚用燃焼部３２ｂとなっている。これら燃焼部３２ａ、３２ｂは、図１において左右方向（Ｘ軸方向）に並んで配置されている。バーナユニット３０へガスを供給する手段５０は、主管５１と、この主管５１から分岐した２つの分岐管５２、５３とを有している。主管５１には、主電磁開閉弁５４と電磁比例弁５５が設けられており、分岐管５２、５３には、それそれ補助電磁開閉弁５６、５７が設けられている。
【００１３】
２つの分岐管５２、５３からのガスはノズルブロック５８を介してバーナ３２の燃焼部３２ａ、３２ｂにそれぞれ供給される。各燃焼部３２ａ、３２ｂにはファン４０からの空気も導入される。各燃焼部３２ａ、３２ｂでは、供給されたガスと空気が混合されて上面の炎口から噴出され、これにより燃焼が行われるようになっている。フレーム３１の内部空間においてバーナ３２の上下はバイパス通路６０により結ばれており、このバイパス通路６０には風量センサ６１が設けられている。この風量センサ６１は、バーナ３２を通るファン４０からの空気量を検出し、この検出信号をファン４０のフィードバック制御のために提供する。
【００１４】
熱交換ユニット２０は、横断面矩形をなし上下端が開口したフレーム２１と、フレーム２１に収容された熱交換部２２とを備えている。フレーム２１の上部は、熱交換部２２を保持するための保持胴２１ｘとなり、下部は燃焼胴２１ｙとして提供される。燃焼胴２１ｙは、バーナユニット３０のフレーム３１に連結されている。
【００１５】
上記熱交換部２２は、給湯用領域２２ａ（第１領域）と、風呂追焚用領域２２ｂ（第２領域）とを有している。これら領域２２ａ、２２ｂはＸ軸方向に並んでおり、給湯用領域２２ａが給湯用燃焼部３２ａの真上に配置され、風呂追焚用領域２２ｂが風呂追焚用燃焼部３２ｂの真上に配置されている。これら領域２２ａ，２２ｂの境界は、燃焼部３２ａ，３２ｂの境界の真上に位置しており、図において符号Ｐで示す。
【００１６】
次に、熱交換部２２の構造について詳述する。図３に示すように、熱交換部２２は、フレーム２１の保持胴２１ｘ内に収容された多数の同形状の薄い共通プレート２５を有している。この共通プレート２５は垂直をなしＸ軸方向に長く延びて形成され、Ｙ軸方向（Ｘ軸方向と直交する水平方向）に互いに等しい間隔をおいて並べられている。
【００１７】
各共通プレート２５は、図２に示すように、給湯用領域２２ａに位置する第１フィンプレート２５ａと風呂追焚用領域２２ｂに位置する第２フィンプレート２５ｂと一体に有している。第１フィンプレート２５ａと第２フィンプレート２５ｂの境界Ｐ上には、必要に応じて、第１フィンプレート２５ａと第２フィンプレート２５ｂ間の伝熱面積を小さくするための開口２５ｄが形成されている。
【００１８】
図１に示すように、熱交換部２２は、互いに別系統をなす第１通水管（第１系統の通水管）２６と第２通水管（第２系統の通水管）２７を有している。第１通水管２６は給湯用領域２２ａに配置され、第２通水管２７は風呂追焚用領域２２ｂに配置されている。第１通水管２６の入口端２６ｘ（図３参照）には給水管７１が接続され、出口端２６ｙには、給湯管７２が接続されている。給湯管７２の先端には栓７３が設けられている。第２通水管２７の入口端２７ｘ（図３参照）には、浴槽８０からの復路管８１が接続され、第２通水管２７の出口端２７ｙには、浴槽８０への往路管８２が接続されている。復路管８１には、ポンプ８５が設けられている。
【００１９】
次に、上記第１通水管２６，第２通水管２７について詳述する。図２，図３に示すように、第１通水管２６は、Ｙ軸方向に延び第１フィンプレート２５ａおよび保持胴２１ｘを直交して貫通し且つＸ軸方向に間隔をおいて配列された複数（ここでは８本）の直管部２６ａと、これら直管部２６ａの端部を連絡するベント部２６ｂとを有している。同様にして第２通水管２７も、複数（ここでは３本）の直管部２７ａとベント部２７ｂとを有している。直管部２６ａ，２７ａは、それぞれ上下２段をなして配列されている。
【００２０】
説明を簡単にするために、上記第１通水管２６の８本の直管部２６ａのうち、入口端２６ｘに最も近いものを符号２６ａ−ＩＮで示す。この直管部２６ａ−ＩＮは、給湯用領域２２ａにおいて領域２２ａ，２２ｂの境界Ｐの近傍に配置されている。第１通水管２６の入口端２６ｘからの水は、この直管部２６ａ−ＩＮを通り、下段の左から２番目，３番目，４番目の直管部２６ａを順に通り、さらに上段の右から１番目〜４番目の直管部２６ａを順に通って通水管２６の出口端２６ｙに至る。
【００２１】
同様に、上記第２通水管２７の３本の直管部２７ａのうち入口端２７ｘに最も近いものを符号２７ａ−ＩＮで示す。この直管部２７ａーＩＮは、風呂追焚用領域２２ｂではなく、上記境界Ｐを越えて給湯用領域２２ａの配置され、第１フィンプレート２５ａを貫通している。他の２本の直管部２７ａは風呂追焚用領域２２ｂにおいて、第２フィンプレート２５ｂを貫通している。第２通水管２７の入口端２７ｘからの水は、直管部２７ａーＩＮを通り、上段の直管部２７ａ，下段の左側の直管部２７ａを順に経て、出口端２７ｙに至る。
【００２２】
上記境界Ｐの近傍の給湯用領域２２ａでは、第２通水管２７の直管部２７ａ−ＩＮが、第１通水管２６の直管部２６ａーＩＮに沿うようにしてその上部に接して重ねられている。
【００２３】
次に、燃焼装置の作用について説明する。追焚の際には、制御ユニットの制御に基づき、ポンプ８５が駆動して、浴槽８０の水を復路管８１、通水管２７、往路管８２を経て循環させる。これと同時に、主電磁開閉弁５４、補助電磁開閉弁５７を開いて、風呂追焚用燃焼部３２ｂでの燃焼を開始する。その結果、風呂追焚用燃焼部３２ｂの真上に位置する第２フィンプレート２５ｂが主に加熱され、第２通水管２７を通る浴槽８０からの水が加熱される。
【００２４】
上記の風呂追焚の単独燃焼の際、給湯用燃焼部３２ａでは燃焼が実行されないので、熱交換部２２の給湯用領域２２ａには、ファン４０からの燃焼を伴わない空気が通過するだけであり、熱交換部２２の給湯用領域２２ａはほとんど加熱されることはない。しかし、風呂追焚用領域２２ｂに一番近い位置にある第１通水管２６直管部２６ａーＩＮは、例外的に風呂追焚用燃焼部３２ｂの熱のあおりを受けて加熱される可能性がある。しかし、この直管部２６ａーＩＮの上部には、風呂追焚用の第２通水管２７の入口端２７ｘ側の直管部２７ａーＩＮが接して重なっているので、直管部２６ａーＩＮで受けた熱は、比較的低い温度の水が通る直管部２７ａーＩＮへと逃げる。したがって、この直管部２６ａーＩＮ内に滞留している水の温度上昇が抑制され、給湯を開始した場合にも、開栓直後に所望温度より高い湯が出るようなことがなくなる。
【００２５】
他方、栓７３を開くと、給水管７１、通水管２６、給湯管７２に水が流れる。給水管７１に設けられた水流スイッチ（図示しない）がこれを検出し、この検出信号に応答して制御ユニット（図示しない）が、主電磁開閉弁５４、補助電磁開閉弁５６を開くことにより、給湯用燃焼部３２ａでの燃焼制御が開始される。その結果、給湯用燃焼部３２ａの真上に位置する第１フィンプレート２５ａが主に加熱され、これにより第１通水管２６を通る給水管７１からの水が加熱され、湯となって給湯管７２へと供給される。この際、風呂追焚用燃焼部３２ｂでは燃焼が行われないので、熱交換部２２の風呂追焚用領域２２ｂには、ファン４０からの燃焼を伴わない空気が通過するだけであり、基本的には第２通水管２７内の水を加熱しない。
【００２６】
上記の給湯単独燃焼時において、第２通水管２７の入口端２７ｘに最も近い直管部２７ａーＩＮは、給湯用領域２２ａに配置されているが、この直管部２７ａーＩＮの下側には、第１通水管２６の直管部２６ａーＩＮが接しており、この直管部２６ａ−ＩＮを流れる冷たい水が、給湯用燃焼部３２ａの火炎の熱を殆ど吸収してくれる。そのため、この直管部２７ａーＩＮ内の水が高温に加熱されることはなく、また、この直管部２７ａーＩＮ内が空の状態になっていたとしても、この直管部２７ａーＩＮの過熱を防止でき、その保護を確実なものとすることができる。
【００２７】
互いに重なり合った２つの直管部において、給湯側の直管部２６ａ−ＩＮを下に、風呂追焚側の直管部２７ａ−ＩＮを上にしたことについて、再度説明を加える。一般的に２つの直管部を上下に重ねた場合、下側に配置された直管部では燃焼熱を直接受け、その熱の大部分を吸収する。上側の直管部では、下側の直管部から熱の伝導を主に受けるだけである。ここで考慮すべきは次の点である。給湯側の通水管２６は常に水で満たされている。これに対して、浴槽８０が空になっている場合には風呂追焚側の通水管２７から浴槽８０へ水が流れ出てしまうことがあるため、この通水管２７が空の状態になっている可能性がある。風呂追焚の単独燃焼の際には、下側に位置する給湯側の直管部２６ａ−ＩＮが風呂追焚用の燃焼部３２ｂからの燃焼熱を受けるが、この直管部２６ａ−ＩＮには水が満たされているので空焚きにならず、この直管部２６ａ−ＩＮの熱損傷は生じない。しかも、この直管部２６ａ−ＩＮで受けた熱は、この直管部２６ａ−ＩＮに接した風呂追焚側の直管部２７ａ−ＩＮで奪うことができる。給湯の単独燃焼の際には、給湯用燃焼部３２ａでの燃焼熱を下側の給湯側の直管部２６ａ−ＩＮで直接受け、上側の風呂追焚側の直管部２７ａ−ＩＮでは殆ど受けない。しかも、給湯用の直管部２６ａ−ＩＮでは水が流れており、ここで受けた熱を殆ど水が運び去っていくので、風呂追焚側の直管部２７ａ−ＩＮに伝達される熱も少ない。そのため、この直管部２７ａ−ＩＮが空であっても、熱損傷が生じないのである。すなわち、風呂追焚側の直管部２７ａ−ＩＮが下側にある仮定した場合には、それが空の時に熱損傷が生じる可能性があるが、本実施例ではそのような不都合が生じないのである。
【００２８】
上記装置では、給湯と風呂追焚の両者を同時に実行することができるのは勿論である。
【００２９】
上記実施形態において、境界Ｐ近傍で互いに重ねられる通水管２６，２７の直管部は、これら通水管２６，２７の入口端に最も近い直管部２６ａ−ＩＮ，２７ａ−ＩＮの代わりに、入口端から２番目，３番目の直管部２６ａ，２７ａであってもよい。これら２番目，３番目の直管部２６ａ，２７ａを通る水は、最も近い直管部２６ａ−ＩＮ，２７ａ−ＩＮを通る水に比べれば熱の吸収効果は弱いものの、重ねられた直管部からの熱吸収を行えるからである。
【００３０】
図４は、本発明の第２の実施形態を示す。この実施形態では、風呂追焚側の通水管２７の２本の直管部２７ａが、給湯用領域において境界Ｐの近傍で、給湯側の通水管２６の２本の直管部２６ａに重なっている。他の構成は、第１の実施例と同様であるので、図中同番号を付してその詳細な説明を省略する。
【００３１】
上記第１，第２の実施形態では、給湯と風呂追焚に適用したが、給湯と暖房に適用してもよいし、風呂追焚と暖房に適用してもよい。
【００３２】
図５は、本発明の第３の実施形態を示す。この実施形態では、給湯用燃焼部３２ａの隣（追焚用燃焼部３２ｂとは反対側の隣）に暖房用燃焼部３２ｃ（第３燃焼部）が設けられている。これに対応して熱交換部は、暖房用領域２２ｃ（第３領域）を備えている。この暖房用領域２２ｃは、共通フレーム内において、暖房用燃焼部３２ｃの真上で、給湯用領域２２ａの隣（追焚用領域２２ｂとは反対側の隣）に配置されている。共通プレート２５は、これら３つの領域２２ａ〜２２ｃにわたって延びており、この暖房用領域２２ｃに位置する部分が第３フィンプレート２５ｃとなっている。共通プレート２５には、領域２２ａ，２２ｃの境界Ｐ’において開口２５ｄ’が形成されている。熱交換部の暖房用領域２２ｃは、この第３フィンプレート２５ｃを貫く複数（本実施例では３本）の直管部２８ａを含む第３通水管２８（第３系統の通水管）を備えている。この通水管２８の最も入口端に近い直管部２８ａ−ＩＮが、給湯用領域２２ａにおいて、境界Ｐ’近傍の給湯側直管部２６ａに沿い、その上側に接するようにして重ねられている。この直管部２６ａ，２８ａ−ＩＮの重なりによる効果は、直管部２６ａ−ＩＮ，２７ａ−ＩＮの重なりによる効果とほぼ同様であるので、詳細な説明を省略する。
【００３３】
本発明は上記実施形態に制約されず、種々の態様が可能である。例えば給湯，風呂追焚，暖房に限らず他の機能を複数備えたものに適用してもよい。
さらに、用途によっては、互いに重ね合わせた別系統の通水管の直管部を、上記領域の境界上に配置してもよい。
複数の領域のフィンプレートは別体をなし互いに近接して配置されるものであってもよい。
【００３４】
【発明の効果】
以上説明したように、請求項１の発明によれば、熱交換部が複数の燃焼部に対応した複数の領域を有し、これら領域にそれぞれ別系統の通水管を貫通させているので、基本的には、ほとんど通水管毎に相互干渉がない熱交換を行うことができる。また、第２領域での熱交換が実行されている時に、第１，第２領域の境界近傍の第１系統の直管部が第２燃焼部からの熱を受けても、この直管部には第２系統の通水管の直管部が長手方向に沿って接していて、この第２系統の直管部を流れる水により第１系統の直管部で受けた熱を奪ってくれる。その結果、この第１系統の直管部内の水が高温に加熱されることがないので、第１領域での熱交換再開時点で、第１通水管からの湯が高温で供給されるのを防止することができる。
また、給湯用の第１領域内にて第１、第２の系統の直管部を接するようにしたので、第２領域での熱交換時に、給湯用の第１系統の直管部が第１燃焼部から受ける熱が比較的小さくなり、給湯初期に高温の湯が直接ユーザに触れるのより一層確実に防止できる。しかも、互いに接した２つの直管部のうち、第１系統の直管部が下側に配置されているので、第１領域での熱交換時には、第１燃焼部での燃焼熱をこの第１系統の直管部で殆ど吸収することができ、上側の第２系統の直管部の加熱を防止できる。その結果、この第２系統の直管部を高い燃焼熱から保護することができる。
【００３６】
請求項２の発明によれば、第２燃焼部，熱交換部の第２領域が風呂追焚に用いられており、給湯用の第１領域での熱交換時に第２通水管が空になることがある。その場合でも、上記給湯用の第１領域にある第２系統の通水管の直管部の熱損傷を確実に防止することができる。
【００３７】
請求項３の発明によれば、熱交換部が複数の燃焼部に対応した複数の領域を有し、これら領域にそれぞれ別系統の通水管を貫通させているので、基本的には、ほとんど通水管毎に相互干渉がない熱交換を行うことができる。また、第２領域での熱交換が実行されている時に、第１，第２領域の境界近傍の第１系統の直管部が第２燃焼部からの熱を受けても、この直管部には第２系統の通水管の直管部が長手方向に沿って接していて、この第２系統の直管部を流れる水により第１系統の直管部で受けた熱を奪ってくれる。その結果、この第１系統の直管部内の水が高温に加熱されることがないので、第１領域での熱交換再開時点で、第１通水管からの湯が高温で供給されるのを防止することができる。
また、互いに接した直管部において、第２系統の直管部が、第２系統の通水管の入口端に最も近い直管部であるので、最も冷たい水で、第１系統の直管部から熱を奪うことができ、上記効果をより顕著にすることができる。
【００３８】
請求項４の発明によれば、互いに接した直管部において、第１系統の直管部が、第１系統の通水管の入口端に最も近い直管部であるので、最も冷たい水で、第２系統の直管部から熱を奪うことができ、請求項３の発明の効果をより顕著にすることができる。
【００３９】
請求項５の発明によれば、熱交換部が複数の燃焼部に対応した複数の領域を有し、これら領域にそれぞれ別系統の通水管を貫通させているので、基本的には、ほとんど通水管毎に相互干渉がない熱交換を行うことができる。また、第２領域での熱交換が実行されている時に、第１，第２領域の境界近傍の第１系統の直管部が第２燃焼部からの熱を受けても、この直管部には第２系統の通水管の直管部が長手方向に沿って接していて、この第２系統の直管部を流れる水により第１系統の直管部で受けた熱を奪ってくれる。その結果、この第１系統の直管部内の水が高温に加熱されることがないので、第１領域での熱交換再開時点で、第１通水管からの湯が高温で供給されるのを防止することができる。
また、第１，第３領域の境界においても上記と同様の効果を得ることができる。
【図面の簡単な説明】
【図１】本発明の第１の実施形態を示す燃焼装置の概略構成を示すシステム図である。
【図２】フィンプレート及びそれを貫通する通水管の直管部を示す正面図である。
【図３】熱交換部の平断面図である。
【図４】本発明の第２の実施形態を示す図２相当図である。
【図５】本発明の第２の実施形態を示す図２相当図である。
【符号の説明】
２２熱交換部
２２ａ給湯用領域（第１領域）
２２ｂ風呂追焚用領域（第２領域）
２２ｃ暖房用領域（第３領域）
２５ａ，２５ｂ，２５ｃフィンプレート
２６第１通水管（第１系統の通水管）
２６ａ直管部
２６ａ−ＩＮ入口端に最も近い直管部
２６ｘ入口端
２７第２通水管（第２系統の通水管）
２７ａ直管部
２７ａ−ＩＮ入口端に最も近い直管部
２７ｘ入口端
２８第３通水管（第３系統の通水管）
２８ａ直管部
２８ａ−ＩＮ入口端に最も近い直管部
３２ａ給湯用燃焼部（第１燃焼部）
３２ｂ風呂追焚用燃焼部（第２燃焼部）
３２ｃ暖房用燃焼部（第３燃焼部）
７１給水管
７２給湯管
８０浴槽
８１往路管
８２復路管
Ｐ第１領域と第２領域の境界
Ｐ’ 第１領域と第３領域の境界[0001]
[Technical field to which the invention belongs]
The present invention relates to a combustion apparatus used for a plurality of uses such as hot water supply and bath remedy.
[0002]
[Prior art]
Conventionally, combustion apparatuses capable of performing both hot water supply and bath remedy are roughly classified into a two-can two-water type and a one-can two-water type.
The two-can two-water combustion apparatus includes two independent heat exchange units and a combustion unit corresponding to these heat exchange units. Each heat exchange unit includes a large number of vertical fin plates and water pipes passing therethrough. When hot water is supplied, combustion is performed in one combustion section, and hot water is supplied through water from the water supply pipe to the water pipe of the heat exchange section corresponding thereto. When bathing is performed, combustion is performed in the other combustion section, and the water in the bathtub is passed through the water pipe of the corresponding heat exchange section.
The above-described two-can two-water combustion apparatus can perform hot water supply and bath remedy without interfering with each other, and has high performance. However, since two independent combustion units are required, the apparatus becomes large and expensive.
[0003]
A general one-can two-water combustion apparatus includes a heat exchange unit and a combustion unit, which are common to hot water supply and bath tracking. The heat exchanging part is configured by penetrating through a large number of fin plates two water pipes for hot water supply and for bathing. These two water pipes are arranged separately at the top and bottom. In this apparatus, when performing either hot water supply or bath remedy, combustion is performed in the same combustion section, and the same heat exchange section is heated. When hot water supply is executed, water from the water supply pipe passes through the hot water supply water pipe of the heat exchange section. When bath remedy is executed, water from the bathtub passes through the bath remedy water pipe in the heat exchange section.
[0004]
The one-can / two-water combustion apparatus performs hot water supply and bath remedy with common components, so that the configuration becomes simple and inexpensive. However, there is a drawback that the hot water supply and bath remedy interfere with each other. For example, when only hot water is supplied, the water accumulated in the bath chase water pipe is also heated. Similarly, when only bathing is performed, water accumulated in the hot water supply pipe is also heated. Therefore, the heat exchange efficiency was bad. In addition, when the water accumulated in the hot water flow pipe continues to be heated during bath bathing and becomes hot, hot water higher than the desired temperature may be produced at the initial stage of hot water supply.
[0005]
Japanese Examined Patent Publication No. 2-17784 discloses a one-can two-water combustion apparatus having a structure closest to the present invention. In this combustion device, heat exchange parts for hot water supply and bath remedy are arranged separately on the left and right in one frame, and the combustion parts corresponding to these heat exchange parts are arranged directly below them. Yes. In this configuration, since the mutual interference between the hot water supply and the bath remedy is reduced and the performance is similar to the above-described two-can two-water type, the two heat exchange parts can be accommodated in one frame. Smaller and less expensive than the water type.
[0006]
[Problems to be solved by the invention]
However, in the apparatus disclosed in the above publication, since the heat exchange unit for hot water supply and the heat exchange unit for bath renewal are in close proximity, if the bath is refurbished while the hot water supply side is stopped, the bath replenishment is performed. Possibility of hot water coming out immediately after opening when the water staying in the water flow pipe of the heat exchange section for hot water supply is heated by the flame of the combustion section for firewood and the hot water supply is started next time was there.
[0007]
[Means for Solving the Problems]
A combustion apparatus according to a first aspect of the present invention includes the first and second at least two combustion sections arranged side by side in the negative direction, and a heat exchange section disposed above the combustion sections, and the heat exchange described above. The unit has at least two first and second regions respectively disposed immediately above the first and second combustion units in a common frame, and the first and second regions of the heat exchange unit Each region has a large number of fin plates that extend in the direction in which these regions are arranged and are arranged in a direction orthogonal to this arrangement direction, and first and second water pipes that are separate from each other. The water pipe has a plurality of straight pipe portions that penetrate the fin plate and are arranged in the arrangement direction of the regions, the inlet end of the first system water pipe is connected to the water supply pipe, and the outlet end is By connecting to the hot water supply pipe, the first region of the heat exchange section and this First combustion section corresponding is provided for hot water, the said first, near the boundary of the second region, at least one with a straight tube of the water pipe of the second system of straight pipe portion of the water pipe of the first system At least one of the parts is in contact with each other along the longitudinal direction , and the two straight pipe parts in contact with each other are disposed in the first region for hot water supply, and the two straight pipes in contact with each other The parts are stacked one above the other, and a straight pipe part of the first system is arranged on the lower side, and a straight pipe part of the second system is arranged on the upper side .
[0009]
According to a second aspect of the present invention, in the combustion apparatus according to the first aspect, an inlet end of the second system water pipe is connected to a return pipe from the bathtub, and an outlet end is connected to the forward pipe to the bathtub. Thus, the second region of the heat exchange unit and the second combustion unit corresponding to the second region are provided for bath remedy.
According to a third aspect of the present invention, there is provided a combustion apparatus comprising: first and second at least two combustion sections arranged side by side in a negative direction; and a heat exchange section disposed above the combustion sections. The unit has at least two first and second regions respectively disposed immediately above the first and second combustion units in a common frame, and the first and second regions of the heat exchange unit Each region has a large number of fin plates that extend in the direction in which these regions are arranged and are arranged in a direction orthogonal to this arrangement direction, and first and second water pipes that are separate from each other. The water pipe has a plurality of straight pipe portions penetrating the fin plate and arranged in the arrangement direction of the regions, and in the vicinity of the boundary between the first and second regions, At least one of the straight pipe sections and the straight pipe section of the second system water pipe In contact with each other, one is along its longitudinal direction with one of the two straight pipe portions in contact with each other of said at least straight pipe section belonging to the second system, the most to the inlet end of the water pipe of the second system It is characterized by being close.
According to a fourth aspect of the present invention, in the combustion apparatus according to the third aspect, the straight pipe portion belonging to the first system among the two straight pipe portions in contact with each other is also connected to the inlet end of the water pipe of the first system. It is the closest one.
[0010]
A combustion apparatus according to a fifth aspect of the present invention includes first, second, and third combustion portions arranged side by side in a negative direction, and a heat exchange portion disposed above the combustion portions, and the heat exchange unit described above. The unit has first, second, and third regions disposed in the common frame respectively just above the first, second, and third combustion units, and the third region is the second region. Adjacent to the first region on the opposite side of the region, the first, second, and third regions of the heat exchanging portion extend in the direction in which these regions are arranged and are arranged in a number orthogonal to the direction in which these regions are arranged. The fin plate and the first, second, and third system water pipes that are separate from each other are provided, and the water pipes of each system pass through the fin plate and are arranged in the arrangement direction of the regions. A water pipe of the first system having a plurality of straight pipe portions in the vicinity of the boundary between the first and second regions. At least one of the straight tube portion of at least one and the water pipe of the second system of the straight tube portion is in contact with each other along the longitudinal direction, in the vicinity of the first boundary of the third region, through the first system At least one of the straight pipe portions of the water pipe and at least one of the straight pipe portions of the third system water pipe are in contact with each other along the longitudinal direction thereof.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a one-can two-water combustion apparatus having two functions of hot water supply and bath remedy. This combustion apparatus is configured by connecting an exhaust unit 10, a heat exchange unit 20, a burner unit 30, and a fan 40 in order from the top.
[0012]
The burner unit 30 includes a box-shaped frame 31 having an open upper end, and a burner 32 composed of a number of element groups accommodated in the frame 31. The fan 40 is attached to the bottom wall of the frame 31. The burner 32 is divided into two regions, each of which is a hot water supply combustion section 32a and a combustion combustion section 32b. These combustion parts 32a and 32b are arranged side by side in the left-right direction (X-axis direction) in FIG. The means 50 for supplying gas to the burner unit 30 has a main pipe 51 and two branch pipes 52 and 53 branched from the main pipe 51. The main pipe 51 is provided with a main electromagnetic on-off valve 54 and an electromagnetic proportional valve 55, and the branch pipes 52 and 53 are provided with auxiliary electromagnetic on-off valves 56 and 57, respectively.
[0013]
Gases from the two branch pipes 52 and 53 are supplied to the combustion sections 32a and 32b of the burner 32 through the nozzle block 58, respectively. Air from the fan 40 is also introduced into each combustion section 32a, 32b. In each combustion part 32a, 32b, the supplied gas and air are mixed and ejected from the top of the flame port, whereby combustion is performed. In the internal space of the frame 31, the upper and lower sides of the burner 32 are connected by a bypass passage 60, and an air volume sensor 61 is provided in the bypass passage 60. The air volume sensor 61 detects the amount of air from the fan 40 passing through the burner 32 and provides this detection signal for feedback control of the fan 40.
[0014]
The heat exchange unit 20 includes a frame 21 having a rectangular cross section and having upper and lower ends opened, and a heat exchange unit 22 accommodated in the frame 21. The upper part of the frame 21 serves as a holding cylinder 21x for holding the heat exchange unit 22, and the lower part is provided as a combustion cylinder 21y. The combustion cylinder 21 y is connected to the frame 31 of the burner unit 30.
[0015]
The heat exchanging unit 22 includes a hot water supply area 22a (first area) and a bath chasing area 22b (second area). These regions 22a and 22b are arranged in the X-axis direction, the hot water supply region 22a is disposed right above the hot water supply combustion unit 32a, and the bath remnant region 22b is disposed directly above the bath remedy combustion unit 32b. Has been. The boundaries between these regions 22a and 22b are located immediately above the boundaries between the combustion sections 32a and 32b, and are indicated by the symbol P in the figure.
[0016]
Next, the structure of the heat exchange unit 22 will be described in detail. As shown in FIG. 3, the heat exchanging section 22 has a large number of thin common plates 25 having the same shape and housed in the holding cylinder 21 x of the frame 21. The common plate 25 is vertically formed to extend long in the X-axis direction, and is arranged at equal intervals in the Y-axis direction (horizontal direction orthogonal to the X-axis direction).
[0017]
As shown in FIG. 2, each common plate 25 has a first fin plate 25a located in the hot water supply area 22a and a second fin plate 25b located in the bath retreat area 22b. On the boundary P between the first fin plate 25a and the second fin plate 25b, an opening 25d for reducing the heat transfer area between the first fin plate 25a and the second fin plate 25b is formed as necessary. Yes.
[0018]
As shown in FIG. 1, the heat exchanging unit 22 has a first water pipe (a first system water pipe) 26 and a second water pipe (a second system water pipe) 27 that are separate systems. . The first water pipe 26 is arranged in the hot water supply area 22a, and the second water pipe 27 is arranged in the bath chase area 22b. A water supply pipe 71 is connected to the inlet end 26x (see FIG. 3) of the first water pipe 26, and a hot water supply pipe 72 is connected to the outlet end 26y. A plug 73 is provided at the tip of the hot water supply pipe 72. A return pipe 81 from the bathtub 80 is connected to the inlet end 27x (see FIG. 3) of the second water pipe 27, and an outgoing pipe 82 to the bathtub 80 is connected to the outlet end 27y of the second water pipe 27. ing. The return pipe 81 is provided with a pump 85.
[0019]
Next, the first water pipe 26 and the second water pipe 27 will be described in detail. As shown in FIGS. 2 and 3, the first water pipes 26 extend in the Y-axis direction, pass through the first fin plate 25 a and the holding cylinder 21 x at right angles, and are arranged at intervals in the X-axis direction. It has (in this case, eight) straight pipe portions 26a and a vent portion 26b that communicates the ends of these straight pipe portions 26a. Similarly, the second water pipe 27 also has a plurality of (here, three) straight pipe portions 27a and vent portions 27b. The straight pipe portions 26a and 27a are arranged in two upper and lower stages.
[0020]
In order to simplify the description, among the eight straight pipe portions 26a of the first water pipe 26, the one closest to the inlet end 26x is denoted by reference numeral 26a-IN. The straight pipe portion 26a-IN is disposed in the vicinity of the boundary P between the regions 22a and 22b in the hot water supply region 22a. Water from the inlet end 26x of the first water pipe 26 passes through the straight pipe portion 26a-IN, passes through the second, third, and fourth straight pipe portions 26a from the lower left in order, and further from the upper right. The first through fourth straight pipe portions 26a are sequentially passed to the outlet end 26y of the water pipe 26.
[0021]
Similarly, of the three straight pipe portions 27a of the second water pipe 27, the one closest to the inlet end 27x is denoted by reference numeral 27a-IN. The straight pipe portion 27a-IN is disposed not in the bath remnant region 22b but in the hot water supply region 22a beyond the boundary P, and penetrates the first fin plate 25a. The other two straight pipe portions 27a penetrate the second fin plate 25b in the bath chase area 22b. The water from the inlet end 27x of the second water pipe 27 passes through the straight pipe portion 27a-IN, passes through the upper straight pipe portion 27a and the lower left straight pipe portion 27a in order, and reaches the outlet end 27y.
[0022]
In the hot water supply region 22a in the vicinity of the boundary P, the straight pipe portion 27a-IN of the second water pipe 27 is stacked in contact with the upper portion so as to follow the straight pipe portion 26a-IN of the first water pipe 26. ing.
[0023]
Next, the operation of the combustion apparatus will be described. At the time of remedy, the pump 85 is driven based on the control of the control unit to circulate the water in the bathtub 80 through the return pipe 81, the water pipe 27, and the forward pipe 82. At the same time, the main electromagnetic on-off valve 54 and the auxiliary electromagnetic on-off valve 57 are opened, and combustion in the bath-measuring combustion section 32b is started. As a result, the second fin plate 25b positioned right above the bath-measuring combustion section 32b is mainly heated, and the water from the bathtub 80 passing through the second water pipe 27 is heated.
[0024]
During the above-described bath combustion alone combustion, combustion is not performed in the hot water supply combustion section 32a, so that air without combustion from the fan 40 only passes through the hot water supply area 22a of the heat exchange section 22. The hot water supply region 22a of the heat exchange unit 22 is hardly heated. However, there is a possibility that the first water pipe 26 straight pipe portion 26a-IN located at the position closest to the bath memory area 22b may be heated in response to the heat of the bath memory section 32b. There is. However, since the straight pipe portion 27a-IN on the inlet end 27x side of the second water-flow pipe 27 for bath remedy is in contact with and overlaps with the upper portion of the straight pipe portion 26a-IN, the straight pipe portion 26a-IN The heat received in step escapes to the straight pipe portion 27a-IN through which water having a relatively low temperature passes. Therefore, the temperature rise of the water staying in the straight pipe portion 26a-IN is suppressed, and even when hot water supply is started, hot water higher than the desired temperature does not come out immediately after opening.
[0025]
On the other hand, when the stopper 73 is opened, water flows through the water supply pipe 71, the water flow pipe 26, and the hot water supply pipe 72. A water flow switch (not shown) provided in the water supply pipe 71 detects this, and in response to this detection signal, a control unit (not shown) opens the main electromagnetic on-off valve 54 and the auxiliary electromagnetic on-off valve 56, Combustion control in the hot water supply combustion section 32a is started. As a result, the first fin plate 25a located directly above the hot water supply combustion section 32a is mainly heated, whereby the water from the water supply pipe 71 passing through the first water pipe 26 is heated to form hot water. 72. At this time, since the combustion is not performed in the bath pursuit combusting unit 32b, only the air without the combustion from the fan 40 passes through the bath memorizing region 22b of the heat exchanging unit 22. The water in the second water pipe 27 is not heated.
[0026]
During the hot water hot combustion alone, the straight pipe portion 27a-IN closest to the inlet end 27x of the second water pipe 27 is disposed in the hot water supply region 22a, but below the straight pipe portion 27a-IN. Is in contact with the straight pipe portion 26a-IN of the first water pipe 26, and the cold water flowing through the straight pipe portion 26a-IN almost absorbs the heat of the flame of the hot water supply combustion portion 32a. Therefore, the water in the straight pipe portion 27a-IN is not heated to a high temperature, and even if the straight pipe portion 27a-IN is empty, the straight pipe portion 27a-IN Can be prevented and the protection can be ensured.
[0027]
In the two straight pipe portions that are overlapped with each other, the fact that the straight pipe portion 26a-IN on the hot water supply side is on the bottom and the straight pipe portion 27a-IN on the bath retreat side is on the top is described again. Generally, when two straight pipe portions are stacked one above the other, the straight pipe portion arranged on the lower side directly receives combustion heat and absorbs most of the heat. The upper straight pipe section mainly receives heat conduction from the lower straight pipe section. The following points should be considered here. The water supply pipe 26 on the hot water supply side is always filled with water. On the other hand, when the bathtub 80 is empty, the water may flow out from the water pipe 27 on the bath tracking side to the bathtub 80, so the water pipe 27 is in an empty state. there is a possibility. At the time of single combustion of the bath remedy, the hot water supply side straight pipe portion 26a-IN receives combustion heat from the bath remedy combustion portion 32b, and the straight pipe portion 26a-IN receives the heat of combustion. Since the water is filled with water, it does not become empty, and thermal damage to the straight pipe portion 26a-IN does not occur. Moreover, the heat received by the straight pipe portion 26a-IN can be taken away by the straight pipe portion 27a-IN on the bath tracking side in contact with the straight pipe portion 26a-IN. At the time of single combustion of hot water, the heat of combustion in the hot water supply combustion section 32a is directly received by the straight pipe section 26a-IN on the lower hot water supply side, and almost directly in the straight pipe section 27a-IN on the upper bath retreat side. I do not receive it. In addition, since water flows in the straight pipe portion 26a-IN for hot water supply, and most of the heat received here is carried away, the heat transmitted to the straight pipe portion 27a-IN on the side of the bath is also Few. Therefore, even if the straight pipe portion 27a-IN is empty, no thermal damage occurs. That is, if it is assumed that the straight pipe portion 27a-IN on the bath remedy side is on the lower side, thermal damage may occur when it is empty, but such a problem does not occur in this embodiment. It is.
[0028]
Of course, in the above apparatus, both hot water supply and bath memorial can be executed simultaneously.
[0029]
In the above embodiment, the straight pipe portions of the water pipes 26 and 27 that are overlapped with each other in the vicinity of the boundary P are replaced with the straight pipe portions 26a-IN and 27a-IN that are closest to the inlet ends of the water pipes 26 and 27. It may be the second and third straight pipe portions 26a and 27a from the end. Although the water passing through the second and third straight pipe portions 26a and 27a is less effective in absorbing heat than the water passing through the nearest straight pipe portions 26a-IN and 27a-IN, the straight pipe portions that are stacked. It is because the heat absorption from can be performed.
[0030]
FIG. 4 shows a second embodiment of the present invention. In this embodiment, the two straight pipe portions 27a of the water supply pipe 27 on the bath tracking side overlap with the two straight pipe portions 26a of the water supply pipe 26 on the hot water supply side in the vicinity of the boundary P in the hot water supply region. Yes. Since other configurations are the same as those of the first embodiment, the same reference numerals are given in the drawing, and detailed descriptions thereof are omitted.
[0031]
In the first and second embodiments, the present invention is applied to hot water supply and bath remedy, but may be applied to hot water supply and heating, or may be applied to bath remedy and heating.
[0032]
FIG. 5 shows a third embodiment of the present invention. In this embodiment, a heating combustion section 32c (third combustion section) is provided next to the hot water supply combustion section 32a (next to the side opposite to the combustion combustion section 32b). Correspondingly, the heat exchanging section includes a heating area 22c (third area). This heating area 22c is arranged in the common frame, directly above the heating combustion section 32c, next to the hot water supply area 22a (next to the side opposite to the memory area 22b). The common plate 25 extends over these three regions 22a to 22c, and a portion located in the heating region 22c is a third fin plate 25c. An opening 25d ′ is formed in the common plate 25 at the boundary P ′ between the regions 22a and 22c. The heating area 22c of the heat exchange unit includes a third water pipe 28 (a third system water pipe) including a plurality of (three in this embodiment) straight pipe portions 28a penetrating the third fin plate 25c. Yes. In the hot water supply region 22a, the straight pipe portion 28a-IN closest to the inlet end of the water pipe 28 is overlapped along the hot water supply side straight pipe portion 26a in the vicinity of the boundary P ′ so as to be in contact with the upper side. Since the effect of the overlap of the straight pipe portions 26a, 28a-IN is substantially the same as the effect of the overlap of the straight pipe portions 26a-IN, 27a-IN, detailed description is omitted.
[0033]
The present invention is not limited to the above-described embodiments, and various aspects are possible. For example, the present invention is not limited to hot water supply, bath chase, and heating, but may be applied to a device having a plurality of other functions.
Furthermore, depending on the application, the straight pipe portions of the water pipes of different systems that are overlapped with each other may be arranged on the boundary of the region.
The fin plates in the plurality of regions may be separate and arranged close to each other.
[0034]
【The invention's effect】
As described above, according to the first aspect of the present invention, the heat exchange section has a plurality of areas corresponding to the plurality of combustion sections, and the water pipes of different systems are respectively passed through these areas. Specifically, heat exchange with little mutual interference can be performed for each water pipe. In addition, when the heat exchange in the second region is performed, even if the straight pipe portion of the first system near the boundary between the first and second regions receives heat from the second combustion portion, the straight pipe portion In this case, the straight pipe portion of the second system water pipe is in contact with the longitudinal direction, and the heat received by the straight pipe portion of the first system is taken away by the water flowing through the straight pipe portion of the second system. As a result, since the water in the straight pipe portion of the first system is not heated to a high temperature, the hot water from the first water pipe is supplied at a high temperature when the heat exchange is resumed in the first region. Can be prevented.
In addition, since the straight pipe portions of the first and second systems are in contact with each other in the first region for hot water supply, the straight pipe portion of the first system for hot water supply is the first during the heat exchange in the second region. The heat received from one combustion part becomes comparatively small, and it can prevent more reliably that a hot hot water touches a user directly in the hot water supply initial stage. Moreover, since the straight pipe part of the first system is disposed on the lower side of the two straight pipe parts in contact with each other, the heat of combustion in the first combustion part is transferred to the first combustion part during heat exchange in the first region. It can be absorbed almost by one straight pipe section, and heating of the upper second straight pipe section can be prevented. As a result, the straight pipe portion of the second system can be protected from high combustion heat.
[0036]
According to invention of Claim 2 , the 2nd combustion part and the 2nd area | region of a heat exchange part are used for the bath memorial, and the 2nd water pipe becomes empty at the time of heat exchange in the 1st area | region for hot water supply Sometimes. Even in that case, it is possible to reliably prevent thermal damage to the straight pipe portion of the second system water pipe in the first region for hot water supply.
[0037]
According to the invention of claim 3 , since the heat exchanging section has a plurality of areas corresponding to the plurality of combustion sections, and the water pipes of different systems are respectively passed through these areas, basically , the heat exchanging section passes almost through. Heat exchange without mutual interference can be performed for each water pipe. In addition, when the heat exchange in the second region is performed, even if the straight pipe portion of the first system near the boundary between the first and second regions receives heat from the second combustion portion, the straight pipe portion In this case, the straight pipe portion of the second system water pipe is in contact with the longitudinal direction, and the heat received by the straight pipe portion of the first system is taken away by the water flowing through the straight pipe portion of the second system. As a result, since the water in the straight pipe portion of the first system is not heated to a high temperature, the hot water from the first water pipe is supplied at a high temperature when the heat exchange is resumed in the first region. Can be prevented.
Further, in the straight pipe parts that are in contact with each other, the straight pipe part of the second system is the straight pipe part that is closest to the inlet end of the water pipe of the second system. The heat can be taken away from the above , and the above effect can be made more remarkable.
[0038]
According to the invention of claim 4 , in the straight pipe portions in contact with each other, since the straight pipe portion of the first system is the straight pipe portion closest to the inlet end of the water pipe of the first system, Heat can be taken from the straight pipe portion of the second system, and the effect of the invention of claim 3 can be made more remarkable.
[0039]
According to the invention of claim 5 , the heat exchanging part has a plurality of areas corresponding to the plurality of combustion parts, and the water pipes of different systems are respectively penetrated into these areas. Heat exchange without mutual interference can be performed for each water pipe. Further, when heat exchange in the second region is being performed, even if the straight pipe portion of the first system near the boundary between the first and second regions receives heat from the second combustion portion, this straight pipe portion In this case, the straight pipe portion of the second system water pipe is in contact with the longitudinal direction, and the heat received by the straight pipe portion of the first system is taken away by the water flowing through the straight pipe portion of the second system. As a result, since the water in the straight pipe portion of the first system is not heated to a high temperature, the hot water from the first water pipe is supplied at a high temperature when the heat exchange is resumed in the first region. Can be prevented.
Also, the same effect as described above can be obtained at the boundary between the first and third regions .
[Brief description of the drawings]
FIG. 1 is a system diagram showing a schematic configuration of a combustion apparatus showing a first embodiment of the present invention.
FIG. 2 is a front view showing a straight pipe portion of a fin plate and a water pipe passing through the fin plate.
FIG. 3 is a cross-sectional plan view of a heat exchange unit.
FIG. 4 is a view corresponding to FIG. 2 showing a second embodiment of the present invention.
FIG. 5 is a view corresponding to FIG. 2 showing a second embodiment of the present invention.
[Explanation of symbols]
22 Heat exchange part 22a Hot water supply area (first area)
22b Bath memorial area (second area)
22c Heating area (third area)
25a, 25b, 25c Fin plate 26 1st water pipe (1st system water pipe)
26a Straight pipe part 26a-IN Straight pipe part 26x closest to the inlet end Inlet end 27 Second water pipe (water pipe of the second system)
27a Straight pipe portion 27a-IN Straight pipe portion 27x closest to the inlet end Inlet end 28 Third water pipe (water pipe of the third system)
28a Straight pipe part 28a-IN Straight pipe part 32a closest to the inlet end Hot water supply combustion part (first combustion part)
32b Combustion section for bath remedy (second combustion section)
32c Heating combustion section (third combustion section)
71 Water supply pipe 72 Hot water supply pipe 80 Bathtub 81 Outward pipe 82 Return pipe P Boundary P ′ between the first region and the second region P ′ Boundary between the first region and the third region

Claims

A first and a second at least two combustion parts arranged side by side in the direction, and a heat exchange part arranged above these combustion parts,
The heat exchanging unit has at least two first and second regions arranged in the common frame, respectively, which are respectively disposed immediately above the first and second combustion units.
The first and second regions of the heat exchanging portion extend in the direction in which these regions are arranged and are arranged in a direction orthogonal to the arrangement direction, and the first and second regions that are separate from each other. Each system has a water pipe,
The water pipe of each system has a plurality of straight pipe portions that penetrate the fin plate and are arranged in the arrangement direction of the regions,
By connecting the inlet end of the first system water pipe to the water supply pipe and the outlet end to the hot water supply pipe, the first region of the heat exchanging section and the corresponding first combustion section are provided for hot water supply. And
In the vicinity of the boundary between the first and second regions, at least one of the straight pipe portions of the first system water pipe and at least one of the straight pipe portions of the second system water pipe are in contact with each other along the longitudinal direction thereof. And
Moreover, the two straight pipe portions that are in contact with each other are disposed in the first region for hot water supply in the vicinity of the boundary of the region, and the two straight pipe portions that are in contact with each other are vertically stacked. A combustion apparatus characterized in that a straight pipe part of the first system is arranged on the lower side and a straight pipe part of the second system is arranged on the upper side .

The inlet end of the water pipe of the second system is connected to the return pipe from the bathtub, and the outlet end is connected to the outgoing pipe to the bathtub. The combustion apparatus according to claim 1 , wherein two combustion parts are provided for bath remedy.

A first and a second at least two combustion parts arranged side by side in the direction, and a heat exchange part arranged above these combustion parts,
The heat exchanging unit has at least two first and second regions arranged in the common frame, respectively, which are respectively disposed immediately above the first and second combustion units.
The first and second regions of the heat exchanging portion extend in the direction in which these regions are arranged and are arranged in a direction orthogonal to the arrangement direction, and the first and second regions that are separate from each other. Each system has a water pipe,
The water pipe of each system has a plurality of straight pipe portions that penetrate the fin plate and are arranged in the arrangement direction of the regions,
In the vicinity of the boundary between the first and second regions, at least one of the straight pipe portions of the first system water pipe and at least one of the straight pipe portions of the second system water pipe are in contact with each other along the longitudinal direction thereof. And
Of the two straight tube portions in contact with each other of said at least straight pipe section belonging to the second system, a combustion apparatus, characterized in that it is closest to the inlet end of the water pipe of the second system.

The combustion according to claim 3 , wherein the straight pipe part belonging to the first system among the two straight pipe parts in contact with each other is also closest to the inlet end of the water pipe of the first system. apparatus.

A first, second, and third combustion section arranged side by side in the direction, and a heat exchange section disposed above the combustion section,
The heat exchanging unit has first, second, and third regions disposed in the common frame respectively just above the first, second, and third combustion units, and the third region is , Adjacent to the first region on the opposite side of the second region,
The first, second, and third regions of the heat exchanging portion are the first and second fins that extend in the direction in which these regions are arranged and that are arranged in a direction orthogonal to the arrangement direction, and the first and second systems that are separate from each other. Each has second and third water pipes,
The water pipe of each system has a plurality of straight pipe portions that penetrate the fin plate and are arranged in the arrangement direction of the regions,
In the vicinity of the boundary between the first and second regions, at least one of the straight pipe portions of the first system water pipe and at least one of the straight pipe portions of the second system water pipe are in contact with each other along the longitudinal direction thereof. And
In the vicinity of the boundary between the first and third regions, at least one of the straight pipe parts of the first system water pipe and at least one of the straight pipe parts of the third system water pipe are in contact with each other along the longitudinal direction thereof. Combustion device characterized by that.