JP2004044878A - Forced circulation type bath hot water supply machine - Google Patents

Forced circulation type bath hot water supply machine Download PDF

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Publication number
JP2004044878A
JP2004044878A JP2002201436A JP2002201436A JP2004044878A JP 2004044878 A JP2004044878 A JP 2004044878A JP 2002201436 A JP2002201436 A JP 2002201436A JP 2002201436 A JP2002201436 A JP 2002201436A JP 2004044878 A JP2004044878 A JP 2004044878A
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Japan
Prior art keywords
hot water
water supply
bathtub
water
heat exchanger
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JP2002201436A
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Japanese (ja)
Inventor
Shigemitsu Nagayama
永山 成充
Mineo Otsuka
大塚 峰雄
Shigeo Watanabe
渡辺 成夫
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Housetec Inc
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Housetec Inc
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Priority to JP2002201436A priority Critical patent/JP2004044878A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a forced circulation type bath hot water supply machine shortening automatic hot water pouring time to a bathtub. <P>SOLUTION: This forced circulation type bath hot water supply machine 1 is provided with a hot water combustion part 2a having a hot water heat exchanger 3a capable of supplying hot water to the bathtub 9 and a reheating combustion part 2b having a reheating heat exchanger 3b connected to the bathtub 9 via a circulation water passage 8. The machine 1 is provided with a bathtub hot water pouring operation mode for pouring hot water from the circulation water passage 8 to the bathtub 9 after simultaneously operating the hot water combustion part 2a and the reheating combustion part 2b and heating hot water by both of the hot water heat exchanger 3a and the reheating heat exchanger 3b when supplying hot water to the bathtub 9. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、配管を介して浴槽に接続され、追焚き及び浴槽に注湯を行う強制循環式風呂給湯機に関する。
【0002】
【従来の技術】
図3に示すように、一般的に強制循環式風呂給湯機1は、都市ガスや灯油を燃焼させるバーナ4と、燃焼ガスを熱交換する熱交換器により構成され、浴室や洗面所等の給湯水栓やシャワー栓に湯を供給する給湯燃焼部2aと、浴槽9の残水を再加熱(追焚き)する追焚き燃焼部2bから構成され、それらを制御部13がコントロールする構造となっており、特に、強制循環式風呂給湯機1の機能における最大の特徴は、浴槽9への湯の自動注湯機能である。
この自動注湯機能は、給水した水を給湯燃焼部2aの給湯熱交換器3aで加熱し、開閉弁17を介し、追焚き燃焼部2bの循環水路8を通し浴槽9に注湯するものであり、設定湯量もしくは設定水位まで湯を自動的に浴槽に注湯するものである。
この場合、追焚き燃焼部2bは運転(燃焼)させておらず、循環水路8の往及び戻りの両方の配管を通り、湯が浴槽9に供給されるようになっている。なお、湯温は給湯配管7に設けられた温度検知器18により検出され、浴槽使用者が設定する温度に制御された上で浴槽9に供給される。また、浴槽9に湯がある場合の足し湯機能も同様に運転している。
【0003】
また、浴槽9の残水を再加熱(追焚き)する場合は、循環水路8に設けられた循環ポンプ11により残水を強制的に循環させて追焚き燃焼部2bで加熱する。この再加熱温度は、循環水路8に設けられた温度検知器18により検出され、浴槽使用者が設定する温度に制御される。
【0004】
このように、従来の強制循環式風呂給湯機1では、浴槽9に自動注湯する際、追焚き燃焼部2bは運転されず、給湯燃焼部2aのみの運転となり、強制循環式風呂給湯機の再大能力を発揮することはなく、よって、浴槽への注湯が長時間となる。
【0005】
また、自動注湯中に、給湯栓・シャワー栓が開弁した場合、制御部13は、開弁を検出し、給湯栓・シャワー栓側への給湯を優先し、一時的に開閉弁17を閉じて、自動注湯を停止する。よって、前記と同じように、浴槽への注湯時間が長時間となるのである。
【0006】
【発明が解決しようとする課題】
本発明は、浴槽への自動注湯時間を短縮する強制循環式風呂給湯機を提供しようとするものである。
【0007】
【課題を解決するための手段】
本発明は、次のものに関する。
(1)浴槽に湯を供給可能な給湯熱交換器を有する給湯燃焼部と、循環水路を介して浴槽と接続する追焚き熱交換器を有する追焚き燃焼部とを備え、追焚き燃焼部は浴槽の残水を前記循環水路を介して循環ポンプで強制的に循環させて追焚き熱交換器により加熱可能とし、給湯燃焼部からの湯水は給湯熱交換器の給湯配管と循環水路の接続部に設けられた開閉弁を介して循環水路に供給可能であり、給湯燃焼部の給湯熱交換器の前記給湯配管と、追焚き燃焼部の追焚き熱交換器の前記循環水路には、それぞれ温度検知器を備え、制御部は、温度検知結果を基に前記給湯燃焼部又は追焚き燃焼部の燃焼量を制御する強制循環式風呂給湯機であって、浴槽に湯を供給する際、前記給湯燃焼部と追焚き燃焼部を同時に運転し、湯が給湯熱交換器と追焚き熱交換器で加熱された上で循環水路から浴槽に注湯する浴槽注湯運転モードを備える強制循環式風呂給湯機。
(2)循環水路に、逆止弁を設けてなる上記(1)記載の強制循環式風呂給湯機。
(3)開閉弁が、流量を可変する機能を有する上記(1)又は(2)記載の強制循環式風呂給湯機。
(4)循環水路に、流量を可変する水制御弁を設けてなる上記(1)又は(2)記載の強制循環式風呂給湯機。
【0008】
【発明の実施の形態】
本発明における強制循環式風呂給湯機は、給湯燃焼部から一般的な給水栓に湯を供給するための給湯配管と、浴槽に湯を供給及び循環ポンプで浴槽の湯の循環を可能とする循環水路を持ち、循環水路は浴槽下部に設けられる循環アダプタに接続される。
給湯配管と循環水路の接続部には、浴槽への湯の供給を制御するとともに浴槽の残水が上水側に逆流することを防ぐために開閉弁が設けられる。
【0009】
強制循環式風呂給湯機内には、給湯栓・シャワー栓及び浴槽に湯を供給する給湯燃焼部と、浴槽の残水を追焚き加熱する追焚き燃焼部を内蔵し、それぞれの燃焼部に対応する熱交換器を持つ。この熱交換器は、熱交換により水の加温を可能とするものであれば特に限定されるものではなく、熱交換器の形態は、一般的な追焚き燃焼部及び給湯燃焼部に一対となる熱交換器でも、追焚き熱交換器と給湯熱交換器が一体となったもの、また、他の熱源用熱交換器と一体となっていてもよい。
【0010】
強制循環式風呂給湯機に用いる熱源に関しては、ガス又は石油を燃焼可能なバーナ等を使用することができる。
【0011】
この強制循環式風呂給湯機を配管を介して接続する浴槽は、通常用いられる浴槽であれば特に限定されるものではなく、その材質に関しても、金属製又は合成樹脂製のものを適宜に使用することができる。
【0012】
給湯熱交換器の給湯配管と循環水路との接続部に設ける開閉弁としては、通水及び止水が可能な開閉弁であれば特に限定されるものではなく、水用の電磁弁を好適に使用することができる。また、開閉弁は、閉弁した際に弁よりも下流側の配管内の水を空気と置換する大気開放機構、又は、弁の上下流に差圧が生じた際に開弁し、空気を取り入れ差圧を解消する機構を有する減圧式逆流防止機構等が付設されているものがより好ましい。更に、流量の可変制御機能を後述する水制御弁と同様に搭載してもよい。
【0013】
なお、浴槽への自動注湯中に、給湯熱交換器から追炊き燃焼部に流入する湯が追炊き熱交換器で追加熱されずに浴槽に供給されることがなく、追炊き燃焼部の加熱能力を最大に活用できるように、循環水路に、少なくとも1個の逆止弁を設けるようにするのが好ましい。
【0014】
また、自動注湯中に給湯栓・シャワー栓が使われた場合でも、自動注湯運転を中断することなく継続運転する制御が可能となり、浴槽への注湯時間を短縮できるように、前記の開閉弁に湯の流量を可変する機構を設けるようにしたり、また、循環水路に設けた水制御弁により流量を可変とするのが好ましい。
この水制御弁としては、水の流路面積を徐々に又は段階的に制限または拡大可能な機構を有するものであれば、その駆動形態等について限定されない。
【0015】
温度検知器は、給湯燃焼部の給湯熱交換器の給湯配管と、追焚き燃焼部の追焚き熱交換器の循環水路と、給水配管とのそれぞれに備えるようにするのが好ましい。
【0016】
給水配管には水量センサが設けられ、このセンサには、通常用いられる水量センサを用いることができ、具体的には、水流により回転する羽根車に磁石を取付け、その磁石の回転をホールICにより電気的なパルス信号に変換して出力させ、マイコンにより上記パルス信号を計数することにより水量を検出するものを用いることができる。
【0017】
また、浴槽内の湯の水位を検知するための水位センサには、通常用いられる水位センサを用いることができ、具体的には、半導体式の圧力センサにより、浴槽内の湯の水圧を検出し、マイコンにより圧力センサからの電気信号を水位に換算するものを用いることができる。
【0018】
本発明の強制循環式風呂給湯機に用いる制御部は、設定手段、開閉制御手段、演算手段、積算手段又は水位検知手段のいずれかまたは両方を有するものであり、具体的にはマイコンを使用することができる。個々の手段について述べると、設定手段は、使用者が任意の浴槽内湯量をマイコンに記憶させるものであり、制御部と電気的に接続されたリモコン等の操作部より入力を行う。開閉制御手段は、開閉弁の開弁及び閉弁を制御するものであり、浴槽への湯の供給を行う際に開弁し、給湯栓・シャワー栓への給湯をおこなう際には閉弁させるものである。積算手段は、水量センサから得られる水量を積算して、浴槽へ供給した総湯量(以下浴槽内湯量という)を求めるものである。また、水位検知手段は、水位センサから得られる浴槽内の湯の水位を検知し、浴槽へ供給した湯が使用者の所望する湯量であるかを求めるものである。演算手段は、使用者が所望する湯温、入水温度と流量より、給湯燃焼部及び追焚き燃焼部の必要能力を求め燃焼量を制御するためのデータを演算するものである。
【0019】
この制御部は、上記の手段を有することで浴槽への自動注湯制御を行ない、リモコンにて使用者からの自動注湯の指示が入力されると、開閉弁を開弁させると同時に積算手段または水位検知手段により浴槽内の湯量を求め、時間経過と共に増大する浴槽内湯量は水位の値が、設定手段により設定された浴槽内湯量または水位の値とが等しくなった時点で開閉弁を閉弁して、自動注運転を終了する。
【0020】
【実施例】
以下、本発明に係る強制循環式風呂給湯機の実施例について、図1乃至図2を参照して詳細に説明する。
図1は本発明の実施例による強制循環式風呂給湯機を浴槽へと接続した概略図、図2は図1中のリモコンの概略図である。
図1において、強制循環式風呂給湯機1は、従来品と同様に外装20の内部に燃料を燃焼するガスバーナ4が内蔵された給湯燃焼部2aと追焚き燃焼部2bを持ち、それぞれ給湯熱交換器3aと追焚き熱交換3bを有している。それぞれの燃焼部2は、複数のガスバーナ4により形成され、燃料ガス量の供給及び制御を行うガス供給弁(図示省略)、ガス比例弁(図示省略)や、能力に応じて燃焼させるガスバーナ4を切替える能力切替弁(図示省略)を備えている。燃焼に必要な空気の供給は、送風機(図示省略)を用いて強制的に燃焼部2に供給される。
【0021】
熱交換を行う水は、給水口5より給水配管6を通り給湯燃焼部2aに導入され、水量センサ14及び温度検知器18を介して、給湯熱交換器3aへと流入し、燃焼ガスと熱交換を行い加温される。給湯熱交換器3aを通過した湯は、水制御弁16及び温度検知器18を通過した後、一方はシャワー栓または給湯水栓に向かう給湯配管7に、他方は給湯配管7から分岐され、開閉弁17を介し循環水路8側に分かれる。
【0022】
給湯配管7から分岐する配管に設けられ浴槽9への給湯を選択するための開閉弁17は、開閉弁17を開弁させることで循環水路8に湯を導き、浴槽9への注湯を行えるようになっている。また、開閉弁17は、閉弁時に大気開放となる大気解放機構を備えており、開閉弁よりも下流側の配管内水を空気に置換する。
【0023】
次に、図1中に示す制御部13は、設定手段及び開閉制御手段及び積算手段または水位検出手段を有する機器の制御を行うために使用されるマイコンを搭載し、リモコン12からの指示内容に従って機器の運転を行う。また、リモコン12には、図2に示すように、湯を所望する際に押下する給湯スイッチ21と、自動注湯を行う際に押下する自動注湯スイッチ22と、追焚きスイッチ23と湯温設定スイッチ24及び浴槽内湯量設定スイッチ25が設けられている。
【0024】
強制循環式風呂給湯機1の運転について、まず、給湯水栓またはシャワーを使用する際の運転について説明すると、湯を所望する使用者は、図2に示すリモコン12の給湯スイッチ21を押下し、その後、給湯水栓またはシャワー栓を開くことで、予め設定した温度の湯を得ることができる。これは、給湯水栓またはシャワー栓を開くと、給水口5より給水配管6を通り給湯熱交換器3aへと水が流入し、制御部13が、流入する水の水量を水量センサ15により、また、入水温を温度検知器18により検出し、使用者の設定した湯温となるように、ガス比例弁を調整し、給湯燃焼部2aで燃料ガスを燃焼させ、燃焼ガスと水の熱交換を行うことによる。また、使用者の所望する湯量が多く、給湯熱交換器3aの能力以上の要求を受けた場合には、水制御弁16により水量を絞り込み、供給する湯量を少なくして、設定された温度の湯を供給するようにする。更に、給湯またはシャワー栓を使用する際には、開閉弁は閉弁させているので、湯の全量が給湯配管7を通り、カラン又はシャワーより吐出する。
【0025】
次に、浴槽9への自動注湯運転について説明すると、使用者は、図2に示すリモコン12の自動注湯スイッチ22を押下しただけで、自動的に浴槽9への注湯を行うことができる。この場合、制御部13が自動注湯スイッチ22を押下したことを検出し、開閉弁17を開弁させて給水口5から給湯熱交換器3aへと水を導き、ガス比例弁を調整して、給湯燃焼部2aで燃料ガスを燃焼させて燃焼ガスと水の熱交換させ水を加温し、給湯配管7の温度検知器18、開閉弁17を介し、追焚き熱交換器3bに流入する。
追焚き燃焼部2bで、給湯燃焼部2aと同様に湯が追加熱され、設定温度まで加熱され、循環水路8を通り循環アダプタ10から浴槽9へ注湯されることによる。
ここで、給湯燃焼部2aから循環水路8に流入した湯は、循環水路8の戻り側配管に設置された逆止弁19により、戻り側への流入を阻止され、追焚き熱交換器3bに流入するように制限される。ここで、制御部13は、温度検知手段18から得られる入水温度と使用者が設定した湯温から、給湯燃焼部2aと追焚き燃焼部2bの加熱能力合計となる最大加熱能力を演算し、水制御弁16を相当する流量となるよう制御する。そして、積算手段により水量センサ15より得られる湯量、または水位センサ15で得られる浴槽水位から浴槽9内湯量を求め、設定手段により設定された浴槽9内湯量となったところで、開閉制御手段により開閉弁17を閉弁し、給湯燃焼部2aと追焚き燃焼部2bの燃焼を停止する。
【0026】
通常、自動注湯運転を行っている最中は、給湯・シャワー栓が閉じているので、湯の全量が浴槽9へと供給されるが、自動注湯中に給湯栓・シャワー栓が開けられると、制御部13は、温度検知器及18及び水量センサ14により注湯及び給湯栓・シャワー栓に供給される流量を検出し、最大加熱能力から給湯栓・シャワー栓への供給する給湯能力分を減じた給湯能力分と追焚き燃焼部2bの追焚き加熱能力分の合計と、浴槽9へ供給する湯の必要加熱量を演算し、能力がある場合は追焚き燃焼部2bの燃焼量及び循環水路8に設けた水制御弁16により流量を制限し、設定された湯温で浴槽に湯を供給継続する。
給湯栓・シャワー栓で使用される流量が多い場合は、能力が足りないため、開閉弁17を閉弁して、一時的に注湯作業を中断する。自動注湯運転中に給湯・シャワー栓が開けられたことの検出方法は、様々な方法があるが、本実施例では、自動注湯の供給湯量がほぼ一定であることを利用し、水量センサ14から得られる水量が変化したことで検出するようにしている。
【0027】
【発明の効果】
本発明の強制循環式風呂給湯機によれば、浴槽に湯を供給する際、給湯燃焼部と追焚き燃焼部を同時に運転し、湯が給湯熱交換器と追焚き熱交換器で加熱された上で循環水路から浴槽に注湯する浴槽注湯運転モードを備える構成としており、給湯燃焼部と追焚き燃焼部との両燃焼部の合計である最大加熱能力で湯を加熱して、注湯することができて、従来の強制循環式風呂給湯機における給湯燃焼部単独の湯の加熱での注湯に比べて、浴槽への自動注湯時間を短縮することができる。
【0028】
また、循環水路に逆止弁を設けるようにすれば、自動注湯中に給湯熱交換器から追焚き燃焼部に流入する湯が、追焚き熱交換器で追加熱されず浴槽に供給されることはなく、追焚き燃焼部の加熱能力を最大に活用できる。
【0029】
更に、開閉弁に湯の流量を可変する機構を設けたり、循環水路に水制御弁を設けることで、自動注湯中に給湯栓・シャワー栓が使われた場合でも、自動注湯運転を中断することなく継続運転する制御が可能となり、浴槽への注湯時間を短縮することが可能となる。
【図面の簡単な説明】
【図1】本発明の実施例による強制循環式風呂給湯機を浴槽に接続した状態の概略図である。
【図2】本発明の実施例による強制循環式風呂給湯機に使用するリモコンの概略図である。
【図3】従来例の強制循環式風呂給湯機を浴槽に接続した状態の概略図である。
【符号の説明】
1 強制循環式風呂給湯機           2 燃焼部
2a 給湯燃焼部               2b 追焚き燃焼部
3 熱交換器                3a 給湯熱交換器
3b 追焚き熱交換器              4 ガスバーナ
5 給水口                  6 給水配管
7 給湯配管                 8 循環水路
9 浴槽                  10 循環アダプタ
11 循環ポンプ               12 リモコン
13 制御部                 14 水量センサ
15 水位センサ               16 水制御弁
17 開閉弁                 18 温度検知器
19 逆止弁                 20 外装
21 給湯スイッチ              22 自動注湯スイッチ
23 追焚きスイッチ             24 湯温設定スイッチ
25 湯量設定スイッチ
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a forced circulation type bath water heater connected to a bathtub through a pipe to perform additional heating and pouring into the bathtub.
[0002]
[Prior art]
As shown in FIG. 3, the forced circulation bath water heater 1 generally includes a burner 4 that burns city gas and kerosene, and a heat exchanger that exchanges heat with the combustion gas, and supplies hot water to a bathroom or a washroom. It is composed of a hot water supply combustion unit 2a for supplying hot water to a faucet or shower tap, and a reheating combustion unit 2b for reheating (reheating) the residual water in the bathtub 9, and the control unit 13 controls them. In particular, the greatest feature of the function of the forced circulation bath water heater 1 is the function of automatically pouring hot water into the bathtub 9.
This automatic pouring function heats the supplied water in the hot water supply heat exchanger 3a of the hot water supply combustion section 2a, and pours the water into the bathtub 9 through the open / close valve 17 through the circulation water passage 8 of the additional heating combustion section 2b. Yes, the hot water is automatically poured into the bathtub to the set hot water amount or the set water level.
In this case, hot water is supplied to the bathtub 9 through both the forward and return pipes of the circulating water channel 8 without operating (burning) the additional firing combustion section 2b. In addition, the hot water temperature is detected by a temperature detector 18 provided in the hot water supply pipe 7 and is supplied to the bathtub 9 after being controlled to a temperature set by a bathtub user. In addition, the hot water function when the hot water is present in the bathtub 9 is also operated.
[0003]
When the remaining water in the bathtub 9 is reheated (refired), the residual water is forcibly circulated by the circulation pump 11 provided in the circulating water channel 8 and heated in the refired combustion unit 2b. This reheating temperature is detected by a temperature detector 18 provided in the circulating water passage 8, and is controlled to a temperature set by a bathtub user.
[0004]
As described above, in the conventional forced-circulation bath water heater 1, when automatically pouring the water into the bathtub 9, the additional heating combustion unit 2b is not operated, and only the hot water combustion unit 2a is operated. It does not exhibit the re-enlargement ability, and therefore, the pouring into the bathtub takes a long time.
[0005]
In addition, when the hot-water tap / shower tap is opened during automatic pouring, the control unit 13 detects the opening, gives priority to hot water supply to the hot-water tap / shower tap side, and temporarily turns on / off the valve 17. Close and stop automatic pouring. Therefore, as described above, the pouring time into the bathtub becomes long.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to provide a forced circulation bath water heater that reduces the time for automatically pouring water into a bathtub.
[0007]
[Means for Solving the Problems]
The present invention relates to the following.
(1) A hot water supply combustion unit having a hot water supply heat exchanger capable of supplying hot water to a bathtub, and a reheating combustion unit having a reheating heat exchanger connected to the bathtub through a circulating water channel, wherein the reheating combustion unit is The residual water in the bathtub is forcibly circulated by a circulation pump through the circulation water passage and can be heated by a reheating heat exchanger, and hot water from the hot water supply combustion unit is connected to a hot water supply heat exchanger at a connection between the hot water supply pipe and the circulation water passage. The hot water supply pipe of the hot water supply heat exchanger of the hot water combustion unit and the circulating water passage of the additional heating heat exchanger of the additional heating combustion unit respectively have a temperature. A forced circulation type bath water heater which controls a combustion amount of the hot water supply combustion unit or the additional heating combustion unit based on a temperature detection result, wherein the control unit is configured to supply the hot water to the bathtub. The combustion unit and the reheating unit are operated at the same time, and the hot water is Forced circulation bath water heater with a bath pouring operation mode for pouring the bathtub from the circulation water channel on which has been heated in the gas heat exchanger.
(2) The forced circulation type bath water heater according to the above (1), wherein a check valve is provided in the circulation channel.
(3) The forced circulation bath water heater according to the above (1) or (2), wherein the on-off valve has a function of changing a flow rate.
(4) The forced circulation bath water heater according to the above (1) or (2), wherein a water control valve for varying the flow rate is provided in the circulation water channel.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
The forced circulation bath water heater according to the present invention includes a hot water supply pipe for supplying hot water from a hot water supply combustion section to a general water faucet, and a circulation system for supplying hot water to the bathtub and circulating hot water in the bathtub with a circulation pump. It has a water channel, and the circulation water channel is connected to a circulation adapter provided at the bottom of the bathtub.
An opening / closing valve is provided at a connection between the hot water supply pipe and the circulation water channel to control supply of hot water to the bathtub and to prevent residual water in the bathtub from flowing back to the water supply side.
[0009]
The forced-circulation bath water heater has a built-in hot water supply combustion unit that supplies hot water to the hot water tap / shower tap and the bathtub, and a reheating combustion unit that reheats and heats the remaining water in the bathtub. Has a heat exchanger. This heat exchanger is not particularly limited as long as it enables water to be heated by heat exchange, and the form of the heat exchanger is a pair of a general additional combustion section and a hot water supply combustion section. The heat exchanger may be one in which the additional heat exchanger and the hot water supply heat exchanger are integrated, or may be integrated with another heat source heat exchanger.
[0010]
As the heat source used for the forced circulation bath water heater, a burner or the like that can burn gas or oil can be used.
[0011]
The bathtub for connecting this forced-circulation type bath water heater through a pipe is not particularly limited as long as it is a commonly used bathtub, and the material is appropriately made of metal or synthetic resin. be able to.
[0012]
The on-off valve provided at the connection between the hot-water supply pipe of the hot-water supply heat exchanger and the circulation water channel is not particularly limited as long as it is an on-off valve capable of passing water and stopping water, and a solenoid valve for water is preferably used. Can be used. Also, the on-off valve is an air release mechanism that replaces water in the pipe downstream of the valve with air when the valve is closed, or opens when a differential pressure occurs upstream and downstream of the valve, and opens and closes the air. It is more preferable that a pressure-reducing backflow prevention mechanism having a mechanism for eliminating the intake differential pressure is provided. Further, a variable flow rate control function may be mounted similarly to a water control valve described later.
[0013]
During the automatic pouring into the bathtub, the hot water flowing from the hot water supply heat exchanger to the additional cooking combustion unit is not supplied to the bathtub without additional heating in the additional cooking heat exchanger, and the additional cooking combustion unit Preferably, at least one check valve is provided in the circulating channel to maximize the heating capacity.
[0014]
In addition, even when a hot water tap / shower tap is used during automatic pouring, it is possible to control the continuous operation without interrupting the automatic pouring operation, and to shorten the time required for pouring into the bathtub. It is preferable to provide a mechanism for varying the flow rate of hot water in the on-off valve, or to make the flow rate variable by a water control valve provided in the circulation channel.
The drive form of the water control valve is not limited as long as it has a mechanism capable of gradually or stepwise limiting or enlarging the flow path area of water.
[0015]
It is preferable that the temperature detector is provided in each of the hot water supply pipe of the hot water supply heat exchanger of the hot water supply combustion section, the circulation water channel of the additional heat exchanger of the additional heat combustion section, and the water supply pipe.
[0016]
A water flow sensor is provided in the water supply pipe, and a water flow sensor generally used can be used as this sensor. Specifically, a magnet is attached to an impeller rotating by a water flow, and the rotation of the magnet is determined by a Hall IC. An electric pulse signal may be converted to an electric pulse signal and output, and the microcomputer may count the pulse signal to detect the amount of water.
[0017]
In addition, as a water level sensor for detecting the water level of the hot water in the bathtub, a commonly used water level sensor can be used. Specifically, a semiconductor type pressure sensor detects the water pressure of the hot water in the bathtub. Alternatively, a microcomputer that converts an electric signal from a pressure sensor into a water level can be used.
[0018]
The control unit used in the forced circulation bath water heater of the present invention has one or both of setting means, opening / closing control means, calculating means, integrating means and water level detecting means, and specifically uses a microcomputer. be able to. Describing each means, the setting means allows the user to store an arbitrary amount of hot water in the bathtub in the microcomputer, and inputs the setting from an operation unit such as a remote controller electrically connected to the control unit. The opening / closing control means controls opening and closing of the opening / closing valve, and opens when supplying hot water to the bathtub, and closes when hot water is supplied to the hot-water tap / shower tap. Things. The integrating means integrates the amount of water obtained from the water amount sensor to determine the total amount of hot water supplied to the bathtub (hereinafter referred to as the amount of hot water in the bathtub). The water level detecting means detects the water level of the hot water in the bathtub obtained from the water level sensor and determines whether the amount of hot water supplied to the bathtub is desired by the user. The computing means computes data for controlling the amount of combustion by obtaining the required capacity of the hot water supply combustion section and the additional heating combustion section from the hot water temperature, incoming water temperature and flow rate desired by the user.
[0019]
The control unit controls the automatic pouring of water into the bath tub by having the above-mentioned means, and when an instruction for automatic pouring is input from the remote control by the user, opens the on-off valve and simultaneously accumulates the integrating means. Alternatively, the amount of hot water in the bath tub is obtained by the water level detecting means, and the amount of hot water in the bath tub that increases over time is closed when the value of the water level becomes equal to the amount of hot water in the bath tub or the value of the water level set by the setting means. To end the automatic injection operation.
[0020]
【Example】
Hereinafter, an embodiment of a forced circulation bath water heater according to the present invention will be described in detail with reference to FIGS.
FIG. 1 is a schematic view of a forced circulation bath water heater according to an embodiment of the present invention connected to a bathtub, and FIG. 2 is a schematic view of a remote controller in FIG.
In FIG. 1, a forced circulation bath water heater 1 has a hot water supply combustion unit 2a and a reburning combustion unit 2b in which a gas burner 4 for burning fuel is built in an exterior 20 similarly to a conventional product, and hot water heat exchange is performed respectively. It has a vessel 3a and a reheating heat exchanger 3b. Each combustion unit 2 is formed by a plurality of gas burners 4, and includes a gas supply valve (not shown) for supplying and controlling a fuel gas amount, a gas proportional valve (not shown), and a gas burner 4 for burning according to the capacity. It is provided with a capacity switching valve (not shown) for switching. The supply of air required for combustion is forcibly supplied to the combustion unit 2 using a blower (not shown).
[0021]
The water to be subjected to heat exchange is introduced from the water supply port 5 through the water supply pipe 6 to the hot water supply combustion section 2a, flows into the hot water supply heat exchanger 3a via the water amount sensor 14 and the temperature detector 18, and the combustion gas and heat Exchange and warm. After passing through the hot water supply heat exchanger 3a, the hot water passes through the water control valve 16 and the temperature detector 18, and then one is branched to the hot water supply pipe 7 toward the shower tap or the hot water tap, and the other is branched from the hot water supply pipe 7 and opened and closed. It branches to the circulation water channel 8 side via the valve 17.
[0022]
An on-off valve 17 provided in a pipe branched from the hot water supply pipe 7 to select hot water supply to the bathtub 9 is guided to the circulation water channel 8 by opening the on-off valve 17, and can be poured into the bathtub 9. It has become. Further, the on-off valve 17 includes an air release mechanism that opens to the atmosphere when the valve is closed, and replaces water in the pipe downstream of the on-off valve with air.
[0023]
Next, the control unit 13 shown in FIG. 1 is equipped with a microcomputer that is used to control a device having a setting unit, an opening / closing control unit, and an integrating unit or a water level detecting unit. Operate the equipment. As shown in FIG. 2, the remote controller 12 has a hot water supply switch 21 that is pressed when desired hot water, an automatic pouring switch 22 that is pressed when performing automatic pouring, a reheating switch 23, and a hot water switch. A setting switch 24 and a bathtub hot water amount setting switch 25 are provided.
[0024]
The operation of the forced-circulation bath water heater 1 will be described first with respect to the operation when using a hot water faucet or a shower. A user who desires hot water presses a hot water supply switch 21 of the remote controller 12 shown in FIG. Then, by opening the hot water tap or shower tap, hot water at a preset temperature can be obtained. This is because when the hot water faucet or shower faucet is opened, water flows into the hot water heat exchanger 3a from the water supply port 5 through the water supply pipe 6, and the control unit 13 uses the water amount sensor 15 to measure the amount of water flowing in. Further, the incoming water temperature is detected by the temperature detector 18, and the gas proportional valve is adjusted so as to have the hot water temperature set by the user. By doing. Further, when the amount of hot water desired by the user is large and a request exceeding the capacity of the hot water supply heat exchanger 3a is received, the amount of water to be supplied is reduced by the water control valve 16 to reduce the amount of hot water supplied, and the set temperature is reduced. Supply hot water. Further, when using the hot water supply or the shower tap, since the on-off valve is closed, the entire amount of the hot water passes through the hot water supply pipe 7 and is discharged from the callan or the shower.
[0025]
Next, the automatic pouring operation to the bathtub 9 will be described. The user can automatically pouring the bathtub 9 simply by pressing the automatic pouring switch 22 of the remote controller 12 shown in FIG. it can. In this case, the control unit 13 detects that the automatic pouring switch 22 is pressed, opens the on-off valve 17, guides water from the water supply port 5 to the hot water supply heat exchanger 3a, and adjusts the gas proportional valve. Then, the fuel gas is burned in the hot water supply combustion unit 2a to exchange heat between the combustion gas and water to heat the water, and flows into the additional heating heat exchanger 3b via the temperature detector 18 and the on-off valve 17 of the hot water supply pipe 7. .
Hot water is additionally heated in the supplementary combustion combustion section 2b in the same manner as in the hot water supply combustion section 2a, heated to the set temperature, and poured into the bathtub 9 from the circulation adapter 10 through the circulation water channel 8.
Here, the hot water that has flowed into the circulation channel 8 from the hot water supply combustion unit 2a is prevented from flowing into the return side by the check valve 19 installed in the return pipe of the circulation channel 8, and is sent to the additional heating heat exchanger 3b. Restricted to flow. Here, the control unit 13 calculates the maximum heating capacity that is the total heating capacity of the hot water supply combustion unit 2a and the additional heating combustion unit 2b from the incoming water temperature obtained from the temperature detection unit 18 and the hot water temperature set by the user, The water control valve 16 is controlled to have a corresponding flow rate. Then, the amount of hot water in the bathtub 9 is obtained from the amount of hot water obtained from the water amount sensor 15 by the integrating means, or the amount of hot water in the bathtub 9 from the bathtub water level obtained by the water level sensor 15, and when the amount of hot water in the bathtub 9 is set by the setting means, the opening and closing control means opens and closes. The valve 17 is closed to stop the combustion of the hot water supply combustion section 2a and the additional combustion section 2b.
[0026]
Normally, during the automatic pouring operation, the hot water / shower tap is closed, so that the entire amount of hot water is supplied to the bathtub 9, but the hot water tap / shower tap is opened during the automatic pouring. And the control unit 13 detects the flow rate of the hot water and the hot water supply / shower tap supplied by the temperature detector 18 and the water quantity sensor 14, and calculates the maximum heating capacity from the maximum heating capacity to the hot water supply capacity supplied to the hot water tap / shower tap. Is calculated, and the required heating amount of hot water supplied to the bathtub 9 is calculated, and if there is a capacity, the combustion amount of the reheating combustion unit 2b and The flow rate is limited by the water control valve 16 provided in the circulation water passage 8, and the hot water is continuously supplied to the bathtub at the set hot water temperature.
When the flow rate used by the hot water tap / shower tap is large, the opening / closing valve 17 is closed and the pouring operation is temporarily interrupted because the capacity is insufficient. There are various methods for detecting that the hot water supply / shower tap has been opened during the automatic pouring operation. In the present embodiment, a water amount sensor is used by utilizing the fact that the amount of hot water supplied by the automatic pouring is substantially constant. The change is detected when the amount of water obtained from 14 changes.
[0027]
【The invention's effect】
According to the forced circulation type bath water heater of the present invention, when supplying hot water to the bathtub, the hot water supply combustion unit and the additional heating combustion unit are simultaneously operated, and the hot water is heated by the hot water supply heat exchanger and the additional heating heat exchanger. It has a bath tub pouring operation mode in which hot water is poured into the bath tub from the circulating water channel above, and the hot water is heated at the maximum heating capacity, which is the sum of both the hot water supply combustion section and the additional combustion combustion section, and the hot water is poured. As a result, the time for automatically pouring water into the bathtub can be reduced as compared with the case of pouring by heating hot water in the hot water supply combustion unit alone in the conventional forced circulation bath water heater.
[0028]
Also, if a check valve is provided in the circulation water channel, hot water flowing from the hot water supply heat exchanger to the reheating combustion section during automatic pouring is supplied to the bathtub without additional heating by the reheating steam exchanger. This makes it possible to make the most of the heating capacity of the refired combustion section.
[0029]
Furthermore, by installing a mechanism to change the flow rate of hot water in the on-off valve or installing a water control valve in the circulation channel, the automatic pouring operation is interrupted even if a hot water tap or shower tap is used during automatic pouring. It is possible to control the continuous operation without performing the operation, and it is possible to shorten the time of pouring the water into the bathtub.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a state in which a forced circulation bath water heater according to an embodiment of the present invention is connected to a bathtub.
FIG. 2 is a schematic view of a remote controller used in a forced circulation bath water heater according to an embodiment of the present invention.
FIG. 3 is a schematic diagram showing a state in which a conventional forced circulation bath water heater is connected to a bathtub.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Forced circulation type bath water heater 2 Combustion part 2a Hot water supply combustion part 2b Additional heating combustion part 3 Heat exchanger 3a Hot water supply heat exchanger 3b Additional heating heat exchanger 4 Gas burner 5 Water supply port 6 Water supply pipe 7 Water supply pipe 8 Circulating water channel 9 Bath tank DESCRIPTION OF SYMBOLS 10 Circulation adapter 11 Circulation pump 12 Remote control 13 Control part 14 Water volume sensor 15 Water level sensor 16 Water control valve 17 Open / close valve 18 Temperature detector 19 Check valve 20 Exterior 21 Hot water supply switch 22 Automatic pouring switch 23 Additional heating switch 24 Hot water temperature setting Switch 25 Hot water setting switch

Claims (4)

浴槽に湯を供給可能な給湯熱交換器を有する給湯燃焼部と、循環水路を介して浴槽と接続する追焚き熱交換器を有する追焚き燃焼部とを備え、追焚き燃焼部は浴槽の残水を前記循環水路を介して循環ポンプで強制的に循環させて追焚き熱交換器により加熱可能とし、給湯燃焼部からの湯水は給湯熱交換器の給湯配管と循環水路の接続部に設けられた開閉弁を介して循環水路に供給可能であり、給湯燃焼部の給湯熱交換器の前記給湯配管と、追焚き燃焼部の追焚き熱交換器の前記循環水路には、それぞれ温度検知器を備え、制御部は、温度検知結果を基に前記給湯燃焼部又は追焚き燃焼部の燃焼量を制御する強制循環式風呂給湯機であって、浴槽に湯を供給する際、前記給湯燃焼部と追焚き燃焼部を同時に運転し、湯が給湯熱交換器と追焚き熱交換器で加熱された上で循環水路から浴槽に注湯する浴槽注湯運転モードを備える強制循環式風呂給湯機。A hot water supply combustion unit having a hot water supply heat exchanger capable of supplying hot water to the bathtub, and a reheating combustion unit having a reheating heat exchanger connected to the bathtub through a circulating water channel are provided. The water is forcibly circulated by the circulation pump through the circulation water passage and can be heated by the additional heating heat exchanger, and the hot water from the hot water supply combustion unit is provided at a connection between the hot water supply pipe of the hot water supply heat exchanger and the circulation water passage. The hot water supply pipe of the hot water supply heat exchanger of the hot water supply combustion unit and the circulation water passage of the additional heat exchanger of the additional heat combustion unit may be provided with a temperature detector, respectively. The control unit is a forced circulation bath water heater that controls the amount of combustion of the hot water supply combustion unit or the additional heating combustion unit based on the temperature detection result, and when supplying hot water to the bathtub, the hot water supply combustion unit The reheating unit operates the reheating unit at the same time, and the hot water is supplied by the hot water supply heat exchanger and reheating unit. Forced circulation bath water heater with a bath pouring operation mode for pouring the bathtub from the circulation water channel on heated in exchanger. 循環水路に、逆止弁を設けてなる請求項1記載の強制循環式風呂給湯機。The forced circulation bath water heater according to claim 1, wherein a check valve is provided in the circulation water channel. 開閉弁が、流量を可変する機能を有する請求項1又は請求項2記載の強制循環式風呂給湯機。The forced circulation bath water heater according to claim 1 or 2, wherein the on-off valve has a function of changing a flow rate. 循環水路に、流量を可変する水制御弁を設けてなる請求項1又は請求項2記載の強制循環式風呂給湯機。The forced circulation bath water heater according to claim 1 or 2, wherein a water control valve that varies a flow rate is provided in the circulation water channel.
JP2002201436A 2002-07-10 2002-07-10 Forced circulation type bath hot water supply machine Pending JP2004044878A (en)

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JP2002201436A JP2004044878A (en) 2002-07-10 2002-07-10 Forced circulation type bath hot water supply machine

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008241126A (en) * 2007-03-27 2008-10-09 Osaka Gas Co Ltd Bath device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008241126A (en) * 2007-03-27 2008-10-09 Osaka Gas Co Ltd Bath device

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