JP3170866B2 - 1缶2回路型瞬間加熱式熱交換器 - Google Patents

1缶2回路型瞬間加熱式熱交換器

Info

Publication number
JP3170866B2
JP3170866B2 JP13190192A JP13190192A JP3170866B2 JP 3170866 B2 JP3170866 B2 JP 3170866B2 JP 13190192 A JP13190192 A JP 13190192A JP 13190192 A JP13190192 A JP 13190192A JP 3170866 B2 JP3170866 B2 JP 3170866B2
Authority
JP
Japan
Prior art keywords
circuit
heat exchange
combustion
exchange pipe
water supply
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP13190192A
Other languages
English (en)
Other versions
JPH05302756A (ja
Inventor
貴康 藤田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Noritz Corp
Original Assignee
Noritz Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Noritz Corp filed Critical Noritz Corp
Priority to JP13190192A priority Critical patent/JP3170866B2/ja
Publication of JPH05302756A publication Critical patent/JPH05302756A/ja
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Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【発明の詳細な説明】
【0001】
【産業上の利用分野】本発明は1個の燃焼缶体によって
2つの回路を流れる水をそれぞれ瞬間加熱することがで
きる1缶2回路型瞬間加熱式熱交換器に関する。
【0002】
【従来の技術】従来、例えば実開平3−13066 号公報に
記載の熱交換器においては、給湯回路と風呂追い焚き回
路の各熱交換パイプを、それぞれ燃焼缶体に巻き付けた
後燃焼缶体内に通すようにしている。このように熱交換
パイプを燃焼缶体に巻き付けることで、熱の吸収を一層
効果的にせんとする趣旨である。
【0003】
【発明が解決しようとする課題】ところが、上記従来例
のように、給湯回路と風呂追い焚き回路の両熱交換パイ
プを燃焼缶体に巻き付けるようにした場合には、給湯回
路の熱交換パイプと風呂追い焚き回路の熱交換パイプに
おける熱膨張の違いにより、それぞれの熱交換パイプに
引っ張り、圧縮の各繰り返し応力が加わりやすく、熱交
換パイプが破損やそれによる水漏れなどの欠点があっ
た。またこのため、2つの熱交換パイプをうまく配置せ
ねばならず、構造的な制約が多く、又コストが高くなる
問題点があった。特に、風呂追い焚き回路は不使用時に
管内の水が空になったりするので、給湯単独運転の際に
風呂追い焚き回路が空だきの状態となり、問題があっ
た。
【0004】そこで本発明は、上記従来技術の欠点を解
消し、燃焼缶体部分で熱交換パイプの破損が生じにく
い、耐久性のある1缶2回路型瞬間式熱交換器の提供を
目的とする。
【0005】
【課題を解決するための手段】上記目的を達成するた
め、本発明は、燃焼缶体内に給湯回路と風呂追い焚き回
路の2回路を導入して、それぞれの回路に流れる水を瞬
間加熱するようにした1缶2回路型瞬間加熱式熱交換器
であって、前記給湯回路はその熱交換パイプを前記燃焼
缶体に巻き付けた後燃焼缶体内に通し、前記風呂追い焚
き回路はその熱交換パイプを前記燃焼缶体に巻き付ける
ことなく直接燃焼缶体内に通すことを特徴としている。
【0006】
【作用】風呂追い焚き回路の熱交換パイプは燃焼缶体に
巻き付けられていないので、給湯単独運転の場合、燃焼
缶体の回りで水の通った給湯回路の熱交換パイプが加熱
されるが、風呂追い焚き回路の熱交換パイプは燃焼缶体
の回りで空焚きされることがなくなる。よって風呂追い
焚き回路に加わる熱応力が減少する。勿論、従来生じて
いた給湯回路の熱交換パイプと風呂追い焚き回路の熱交
換パイプとの間での大きな温度差が生じなくなる。また
風呂追い焚き単独運転の場合には、水の流れのない給湯
回路の熱交換パイプが燃焼缶体の回りで加熱されるが、
中に水が入っているので、過熱状態にはならず、また燃
焼缶体や風呂追い焚き回路の熱交換パイプとの温度差も
そんなに大きくならない。また給湯と追い焚きの同時運
転の場合には、従来からあまり問題にならない。
【0007】
【実施例】以下に本発明を実施例に基づいて説明する。
図1は本発明の実施例である1缶2回路型瞬間加熱式熱
交換器の概略を示す断面構成図で、図2は斜視図であ
る。燃焼缶体10の下部にバーナ11が配置され、運転時に
燃焼される。燃焼缶体10内上部に熱交換部12が設けら
れ、該熱交換部12に給湯回路20の熱交換パイプ21と風呂
追い焚き回路30の熱交換パイプ31が通されている。13は
前記両熱交換パイプ21、31に共通の吸熱フィンである。
【0008】前記、給湯回路20の熱交換パイプ21は燃焼
缶体10の外まで延長され、燃焼缶体10に巻き付けられて
いる。一方、風呂追い焚き回路30の熱交換パイプ31は燃
焼缶体10に巻き付けられることなく、回路30に接続され
ている。各熱交換パイプ21、31は銅製パイプとしてい
る。給湯回路20は市水道に接続され、運転停止中も回路
20内に水が満たされている。風呂追い焚き回路30は浴槽
40内に水がない場合等においては回路30内の水は抜け出
ている。
【0009】図示しない給湯カランが開放されることに
より給湯運転が開始されると、バーナ11が燃焼を開始
し、給湯回路20を送られてくる水が熱交換パイプ21を通
る間に燃焼缶体10により瞬間加熱される。また図示しな
い追い焚き運転スイッチのオンにより、循環ポンプ32が
駆動し、浴槽内の水が追い焚き回路30を循環し、熱交換
パイプ31を通る間に燃焼缶体10により瞬間加熱される。
【0010】給湯単独運転がなされる場合には、燃焼缶
体10の銅板、及び給湯回路20の熱交換パイプ21の巻き付
け部は従来と同様に加熱される。が、風呂追い焚き回路
30の熱交換パイプ31は燃焼缶体10に巻き付けられていな
いので、該部分が空焚きとならず、過熱状態となるのが
防止される。よって勿論、従来生じていた給湯回路20の
熱交換パイプ21と風呂追い焚き回路30の熱交換パイプ31
との大きな温度差も解消され、大きな引っ張り、圧縮の
各応力が各熱交換パイプ21、31に加わるのが防止され
る。
【0011】風呂追い焚き運転を単独で行う場合には、
給湯回路20側は、運転停止状態でその熱交換パイプ21の
巻き付け部分が燃焼缶体10から熱を受け加熱されるが、
給湯回路20の場合には水が管内にあるので、過熱状態と
なるのが避けられる。よって熱交換パイプ21の加熱冷却
に伴う繰り返し伸縮の程度が抑制される。また給湯運転
と風呂追い焚き運転を同時運転する場合には、給湯回路
20の熱交換パイプ31の巻き付け部分には水が流れている
ので、勿論過熱状態にはならず、また風呂追い焚き回路
30の熱交換パイプ31も問題はない。
【0012】
【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1缶2回路型瞬間加熱式熱交換器によれば、給
湯回路はその熱交換パイプを前記燃焼缶体に巻き付けた
後燃焼缶体内に通し、前記風呂追い焚き回路は前記燃焼
缶体に巻き付けることなく熱交換パイプを直接燃焼缶体
内に通すようにしたので、空焚きされやすい追い焚き回
路の熱交換パイプが過熱されるのが防止され、また給湯
回路の熱交換パイプと風呂追い焚き回路の熱交換パイプ
との間の大きな温度差が防止される結果、各熱交換パイ
プに対する熱歪みの発生が抑制され、耐久性が増す。勿
論2つの熱交換パイプを同時に燃焼缶体に巻き付ける必
要がないので、熱交換パイプの配管構造及び組み立て作
業が非常に簡単になり、設計の自由度も大きくなる。風
呂追い焚き回路側は燃焼缶体に巻き付けないので、通水
抵抗も低減し、小さなポンプで循環をよくすることがで
きる。
【図面の簡単な説明】
【図1】本発明の実施例である1缶2回路型瞬間加熱式
熱交換器の概略を示す断面構成図である。
【図2】本発明の実施例である1缶2回路型瞬間加熱式
熱交換器の概略を示す斜視図である。
【符号の説明】
10 燃焼缶体 20 給湯回路 21 熱交換パイプ 30 風呂追い焚き回路 31 熱交換パイプ 40 浴槽

Claims (1)

    (57)【特許請求の範囲】
  1. 【請求項1】 燃焼缶体内に給湯回路と風呂追い焚き回
    路の2回路を導入して、それぞれの回路に流れる水を瞬
    間加熱するようにした1缶2回路型瞬間加熱式熱交換器
    であって、前記給湯回路はその熱交換パイプを前記燃焼
    缶体に巻き付けた後燃焼缶体内に通し、前記風呂追い焚
    き回路はその熱交換パイプを前記燃焼缶体に巻き付ける
    ことなく直接燃焼缶体内に通すことを特徴とする1缶2
    回路型瞬間加熱式熱交換器。
JP13190192A 1992-04-24 1992-04-24 1缶2回路型瞬間加熱式熱交換器 Expired - Fee Related JP3170866B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13190192A JP3170866B2 (ja) 1992-04-24 1992-04-24 1缶2回路型瞬間加熱式熱交換器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13190192A JP3170866B2 (ja) 1992-04-24 1992-04-24 1缶2回路型瞬間加熱式熱交換器

Publications (2)

Publication Number Publication Date
JPH05302756A JPH05302756A (ja) 1993-11-16
JP3170866B2 true JP3170866B2 (ja) 2001-05-28

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