JP3903526B2

JP3903526B2 - Bath water heater

Info

Publication number: JP3903526B2
Application number: JP13074497A
Authority: JP
Inventors: 裕文河島; 和則曽根高; 哲郎青木; 龍志岩本; 謙一高垣
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 1997-05-21
Filing date: 1997-05-21
Publication date: 2007-04-11
Anticipated expiration: 2017-05-21
Also published as: JPH10318600A

Description

【０００１】
【発明の属する技術分野】
本発明は、給湯と追焚きのできる風呂給湯器における浴槽水の浄化・殺菌に関するものである。
【０００２】
【従来の技術】
従来の風呂給湯器は図７に示すような構成になっていた。
【０００３】
水は給水口より水量センサ１，水温センサ２を通り、給湯熱交換器３で熱を吸収して、給湯センサ４、給湯水量制御弁５を通り、湯出口より放出される。ガスはガス入口より給湯元電磁弁６，ガスの給湯比例弁７を通り、給湯バーナ８で燃焼される。
【０００４】
浴槽水は循環ポンプ９により、風呂接続アダプタ１０，戻り通路１１，水位センサ１２，切替え三方弁１３，風呂センサ１４，水流スイッチ１５，風呂熱交換器１６，往き通路１７，風呂接続アダプタ１０と循環し、風呂センサ１４で検出する湯温が低下したときには、ガスがガスの風呂元電磁弁１８，風呂比例弁１９を通り、風呂バーナ２０で燃焼し、風呂熱交換器１６で熱を吸収して、浴槽水の追焚きを行う。
【０００５】
浴槽へのお湯はりは、給湯熱交換器３で熱を吸収したお湯が給湯センサ４，給湯水量制御弁５を通り、給湯電磁弁２１，縁切弁２２，往き通路１７および風呂の戻り通路１１を通って、風呂接続アダプタ１０から浴槽に入る。
【０００６】
【発明が解決しようとする課題】
しかしながら、前記従来の風呂給湯器では、浴槽内で溜まる垢やお湯の汚れのために、複数の人が続けて入浴したり、浴槽の水を続けて使用することは大変不潔であり、これをきれいにするためには浴槽のお湯を交換し浴槽を清掃しなければならないため、大変不経済であり手間のかかる作業であるという課題を有していた。
【０００７】
【課題を解決するための手段】
本発明は上記課題を解決するために、本発明の風呂給湯器は、循環ポンプの動作により浴槽水を戻り通路からバイパス三方弁を介して風呂熱交換器に供給し、上部往き通路より排水三方弁を介してろ過槽を経由させ、正逆三方弁を介して往き通路から浴槽に戻す循環経路を形成し、前記ろ過槽に設けた電極に通電することにより循環水の異物を凝集し、凝集した異物をろ過槽内のろ過材で除去する浄化手段と、給湯電磁弁及び縁切弁の動作により給湯熱交換器で所定温度に加熱された湯水を戻り通路からバイパス三方弁を介して風呂熱交換器に供給し、風呂熱交換器でさらに加熱して高温水とした後、上部往き通路より排水三方弁を介してろ過槽を経由させ、正逆三方弁を介して往き通路から浴槽に高温水を供給することで、ろ過槽と往き通路の高温殺菌を行う高温殺菌手段と、給湯電磁弁及び縁切弁の動作により給湯熱交換器で所定温度に加熱された湯水を戻り通路からバイパス三方弁を介して風呂熱交換器に供給し、風呂熱交換器でさらに加熱して高温水とした後、下部往き通路より二方弁を介して戻り通路から浴槽に高温水を供給することで、戻り通路の高温殺菌を行う高温殺菌手段を備え、高温殺菌手段によりろ過槽と往き通路または戻り通路の高温殺菌を行うとき、給湯熱交換器より供給する温水は、ろ過槽と往き通路または戻り通路を流れる高温水より低く給湯の安全性が確保できる温度としたものである。
【０００８】
上記発明によれば、浴槽内で溜まる垢や細菌をろ過槽内の電極に通電することにより凝集し、凝集した垢や細菌をろ過槽内のろ過材で除去し、給湯温度は高温水ではなく温水として給湯の安全を確保し、高温殺菌によりろ過槽内に凝集した細菌を死滅させ、さらに風呂の往き通路と戻り通路を高温殺菌することにより往き通路と戻り通路の細菌を死滅させ、ろ過槽内及び往き通路と戻り通路を常に清潔に保てるため、複数の人が続けて入浴したり、浴槽の水を続けて使用しても、浴槽水を清潔に保つことができる。
【０００９】
【発明の実施の形態】
本発明は、給水路より供給される水を加熱する給湯熱交換器と、給水路に設けられ給水温度を検知する水温センサおよび給水流量を検知する水量センサと、出湯路に設けられ温水温度を検知する給湯センサおよび出湯流量を制御する水量制御弁と、戻り通路を経由して循環ポンプにより供給された浴槽水を加熱する風呂熱交換器と、前記風呂熱交換器で加熱された湯水をろ過槽を経由して往き通路より浴槽に供給する上部往き通路と、前記風呂熱交換器で加熱された湯水をろ過槽をバイパスして往き通路より浴槽に供給する下部往き通路と、前記ろ過槽の入口側に配置し上部往き通路または排水口に流路を切り換える排水三方弁と、前記ろ過槽の出口側に配置し下部往き通路または往き通路に流路を切り換える正逆三方弁と、前記風呂熱交換器をバイパスして前記上部往き通路と下部往き通路の分岐点に接続して循環湯水を供給するバイパス通路と、前記戻り通路に配置し前記バイパス通路または風呂熱交換器に流路を切り換えるバイパス三方弁と、前記給湯熱交換器で加熱された湯水を前記戻り通路に供給する湯張り通路に配した給湯電磁弁及び縁切弁と、前記戻り通路に配置し湯張り通路の切り換えを行う切替え三方弁と、前記戻り通路と下部往き通路を連通し前記風呂熱交換器で加熱された湯水を戻り通路を経由して浴槽に供給する二方弁とを備えた風呂給湯器であって、前記循環ポンプの動作により浴槽水を前記戻り通路からバイパス三方弁を介して風呂熱交換器に供給し、上部往き通路より排水三方弁を介してろ過槽を経由させ、正逆三方弁を介して往き通路から浴槽に戻す循環経路を形成し、前記ろ過槽に設けた電極に通電することにより循環水の異物を凝集し、凝集した異物をろ過槽内のろ過材で除去する浄化手段と、前記給湯電磁弁及び縁切弁の動作により前記給湯熱交換器で所定温度に加熱された湯水を前記戻り通路からバイパス三方弁を介して風呂熱交換器に供給し、該風呂熱交換器でさらに加熱して高温水とした後、上部往き通路より排水三方弁を介してろ過槽を経由させ、正逆三方弁を介して往き通路から浴槽に高温水を供給することで、ろ過槽と往き通路の高温殺菌を行う高温殺菌手段と、前記給湯電磁弁及び縁切弁の動作により前記給湯熱交換器で所定温度に加熱された湯水を前記戻り通路からバイパス三方弁を介して風呂熱交換器に供給し、該風呂熱交換器でさらに加熱して高温水とした後、下部往き通路より二方弁を介して戻り通路から浴槽に高温水を供給することで、戻り通路の高温殺菌を行う高温殺菌手段を備え、前記高温殺菌手段によりろ過槽と往き通路または戻り通路の高温殺菌を行うとき、前記給湯熱交換器より供給する温水は、ろ過槽と往き通路または戻り通路を流れる高温水より低く給湯の安全性が確保できる温度としたものである。
【００１０】
そして、浴槽内で溜まる垢や細菌をろ過槽内の電極に通電することにより凝集し、凝集した垢や細菌をろ過槽内のろ過材で除去し、給湯温度は高温水ではなく温水として給湯の安全を確保し、高温殺菌によりろ過槽内に凝集した細菌を死滅させ、さらに風呂の往き通路と戻り通路を高温殺菌することにより往き通路と戻り通路の細菌を死滅させ、ろ過槽内及び往き通路と戻り通路を常に清潔に保てるため、複数の人が続けて入浴したり、浴槽の水を続けて使用しても、浴槽水を清潔に保つことができる。
【００１１】
また、請求項１に特定した戻り通路の高温殺菌手段の終了後に、循環ポンプを動作させ、戻り通路の高温水を前記戻り通路から切替え三方弁を介してバイパス三方弁より風呂熱交換器へ供給し、下部往き通路より二方弁を経由して強制循環回路を形成し、機器内部に形成される前記強制循環回路の高温殺菌を行う高温殺菌手段を設けたことにより、機器内部に形成される戻り通路を含んだ循環回路を高温殺菌して機器内部の戻り通路の細菌を死滅させ、戻り通路を常に清潔に保てるため、複数の人が続けて入浴したり、浴槽の水を続けて使用しても、浴槽水を清潔に保つことができる。
【００１２】
また、請求項２記載の機器内部に形成した強制循環回路の高温殺菌手段は、風呂センサにより検出される循環水温度が所定の高温になるまで風呂熱交換器で加熱する高温殺菌手段とすることにより、機器内部に形成される戻り通路を含んだ循環回路を高温殺菌して機器内部の戻り通路の細菌を死滅させ、戻り通路を常に清潔に保てるため、複数の人が続けて入浴したり、浴槽の水を続けて使用しても、浴槽水を清潔に保つことができる。
【００１３】
以下、本発明の実施例について図面を用いて説明する。
なお、図７で示した従来例の風呂給湯器と同じ部分については同一符号を付与する。
【００１４】
図１は本発明の実施例を示し、水は給水口より水量センサ１，水温センサ２を通り、給湯熱交換器３で熱を吸収して、給湯センサ４，給湯水量制御弁５を通り、湯出口より放出される。ガスはガス入口より給湯元電磁弁６，ガスの給湯比例弁７を通り、給湯バーナ８で燃焼される。
【００１５】
浴槽水は循環ポンプ９により、風呂接続アダプタ１０，戻り通路１１，水位センサ１２，切替え三方弁１３，風呂センサ１４，水流スイッチ１５，バイパス三方弁２３，風呂熱交換器１６，上部往き通路２４，排水三方弁２５，ろ過材２６とアルミニウム電極２７を備えたろ過槽２８，正逆三方弁２９，往き通路１７，風呂接続アダプタ１０と循環する。浴槽水の風呂センサ１４で検出する湯温が低下したときには、ガスがガスの風呂元電磁弁１８，風呂比例弁１９を通り、風呂バーナ２０で燃焼し、風呂熱交換器１６で熱を吸収して、浴槽水の追焚きを行う。
【００１６】
浴槽へのお湯はりは、給湯熱交換器３で熱を吸収したお湯が給湯センサ４，給湯水量制御弁５を通り、給湯電磁弁２１，縁切弁２２，往き通路１７および風呂の戻り通路１１を通って、風呂接続アダプタ１０から浴槽に入る。２９は下部往き通路３０に設けた正逆三方弁、３１は二方弁、３２はバイパス通路、３３は排水口を示す。
【００１７】
（実施例１）
図２は本発明の実施例１における浄化手段を示し、循環ポンプ９を「弱運転」とし、循環水がろ過槽２８を通過するときに、ろ過槽２８内のアルミニウム電極２７に通電することにより浴槽内で溜まる垢や細菌を水酸化アルミニウムで結合して凝集し、凝集した異物をろ過槽２８内のろ過材２６で除去することができ、運転スイッチがオフされない限り浴槽の浄化運転は継続されるので、浴槽水を常にきれいにでき、複数の人が続けて入浴したり、浴槽の水を続けて使用しても、清潔さを保つことができる。
【００１８】
図３は本発明の実施例１における往き通路の高温殺菌手段を示し、水温センサ１と水量センサ２と給湯センサ４と水量制御弁５の制御により、給湯熱交換器３で加熱した約５０℃、６リットル分の温水を給湯電磁弁２１および縁切弁２２からバイパス三方弁２３，風呂熱交換器１６へ流し、風呂熱交換器１６でさらに加熱して約７５℃の高温水とし、上部往き通路２４，排水三方弁２５，ろ過槽２８，正逆三方弁２９，往き通路１７へ流し、ろ過槽２８と往き管の高温殺菌を行うことにより、ろ過槽内２８と往き管のばい菌を高温で殺菌して死滅させることにより、ろ過槽２８と往き管を清潔に保つことができ、給湯温度は高温水ではなく約５０℃の温水として殺菌運転中の給湯の安全を確保することができる。
【００１９】
図４は本発明の実施例１における戻り通路の高温殺菌手段を示し、水温センサ１と水量センサ２と給湯センサ４と水量制御弁５の制御により、給湯熱交換器３で加熱した約５０℃、６リットル分の温水を給湯電磁弁２１および縁切弁２２からバイパス三方弁２３，風呂熱交換器１６へ流し、風呂熱交換器１６でさらに加熱して約７５℃の高温水とし、下部往き通路３０，二方弁３１，戻り通路１１へ流し、戻り管の高温殺菌を行うことにより、戻り管のばい菌を高温で殺菌して死滅させることにより、戻り管を清潔に保つことができ、給湯温度は高温水ではなく約５０℃の温水として殺菌運転中の給湯の安全を確保することができる。
【００２０】
（実施例２）
図５は本発明の実施例２における機器内部の戻り通路の高温殺菌手段を示し、戻り通路１１の高温水を戻り通路１１から切替え三方弁１３，循環ポンプ９，バイパス三方弁２３，風呂熱交換器１６へ流し，機器内部の戻り通路の高温殺菌を行うことにより、機器内部の戻り管のばい菌を高温で殺菌して死滅させることにより、機器内部の戻り通路を清潔に保つことができる。
【００２１】
（実施例３）
図６は本発明の実施例３における高温殺菌手段を示し、戻り通路１１の高温水を戻り通路１１から切替え三方弁１３，循環ポンプ９，バイパス三方弁２３，風呂熱交換器１６へ流し、風呂センサ１４により機器内部の戻り通路の湯が７５℃になるまで風呂熱交換器１６で加熱して、機器内部の戻り通路の高温殺菌を行うことにより、機器内部の戻り管のばい菌を高温で殺菌して死滅させることにより、機器内部の戻り通路を清潔に保つことができる。
【００２２】
【発明の効果】
以上のように、請求項１記載による発明によれば、浴槽内で溜まる垢や細菌をろ過槽内の電極に通電することにより凝集し、凝集した垢や細菌をろ過槽内のろ過材で除去し、給湯温度は高温水ではなく温水として給湯の安全を確保し、高温殺菌によりろ過槽内に凝集した細菌，往き管，戻り管の細菌を死滅させることにより、ろ過槽内を常に清潔に保てるため、複数の人が続けて入浴したり、浴槽の水を続けて使用しても、浴槽水を清潔に保つことができる。
【００２３】
また、請求項２記載による発明によれば、上記の請求項１による発明の効果に加えて、戻り通路を風呂熱交換器を使用して一層強く戻り通路の殺菌を高温で行うことができ、さらに請求項３に記載による発明によれば風呂センサを活用して戻り通路内の高温殺菌を確実に行う事ができる。
【図面の簡単な説明】
【図１】本発明の実施例における風呂給湯器の構成図
【図２】（ａ）本発明の実施例１における浄化手段を示す風呂給湯器の構成図
（ｂ）同フローチャート
【図３】（ａ）本発明の実施例１における往き通路の高温殺菌手段を示す風呂給湯器の構成図
（ｂ）同フローチャート
【図４】（ａ）本発明の風呂給湯器の実施例１における戻り通路の高温殺菌手段を示す風呂給湯器の構成図
（ｂ）同フローチャート
【図５】本発明の実施例２における戻り通路の高温殺菌手段を示す風呂給湯器の構成図
【図６】本発明の実施例３における戻り通路の高温殺菌手段を示す風呂給湯器の構成図
【図７】従来例の給湯器の構成図
【符号の説明】
１水量センサ
２水温センサ
３給湯熱交換器
４給湯センサ
５水量制御弁
８給湯バーナ
９循環ポンプ
１１戻り通路
１２水位センサ
１３切替え三方弁
１４風呂センサ
１５水流スイッチ
１６風呂熱交換器
１７往き通路
２０風呂バーナ
２１給湯電磁弁
２２縁切弁
２３バイパス三方弁
２４上部往き通路
２５排水三方弁
２６ろ過材
２７アルミニウム電極
２８ろ過槽
２９正逆三方弁
３０下部往き通路
３１二方弁[0001]
BACKGROUND OF THE INVENTION
The present invention relates to purification and sterilization of bathtub water in a bath water heater capable of hot water supply and renewal.
[0002]
[Prior art]
A conventional bath water heater has a configuration as shown in FIG.
[0003]
Water passes through the water amount sensor 1 and the water temperature sensor 2 from the water supply port, absorbs heat by the hot water supply heat exchanger 3, passes through the hot water supply sensor 4 and the hot water supply amount control valve 5, and is discharged from the hot water outlet. The gas passes through the hot water supply source solenoid valve 6 and the gas hot water supply proportional valve 7 from the gas inlet, and is combusted by the hot water supply burner 8.
[0004]
Bath water is circulated with a bath connection adapter 10, a return passage 11, a water level sensor 12, a switching three-way valve 13, a bath sensor 14, a water flow switch 15, a bath heat exchanger 16, a forward passage 17, and a bath connection adapter 10 by a circulation pump 9. When the bath temperature detected by the bath sensor 14 decreases, the gas passes through the bath source solenoid valve 18 and the bath proportional valve 19 and burns in the bath burner 20 and absorbs heat in the bath heat exchanger 16. Retreat the bath water.
[0005]
The hot water that has been absorbed by the hot water supply heat exchanger 3 passes through the hot water supply sensor 4, the hot water supply amount control valve 5, the hot water electromagnetic valve 21, the edge cut valve 22, the forward passage 17, and the bath return passage 11. The bath connection adapter 10 enters the bathtub.
[0006]
[Problems to be solved by the invention]
However, in the conventional bath water heater, due to dirt accumulated in the bathtub and dirt of hot water, it is very unclean for a plurality of people to bathe continuously or use the water in the bathtub continuously. In order to clean it, it was necessary to change the hot water in the bathtub and clean the bathtub, which had the problem of being very uneconomical and laborious.
[0007]
[Means for Solving the Problems]
For the present invention to solve the above problems, a bath water heater of the present invention, by the operation of the circulation pump is supplied to the bath heat exchanger via the bypass three-way valve bathtub water return from the passage, the drainage way from the upper forward passage Form a circulation path that passes through the filtration tank through the valve and returns to the bathtub from the forward passage through the forward / reverse three-way valve, and agglomerates foreign water from the circulating water by energizing the electrodes provided in the filtration tank. Purifying means that removes foreign matter with the filter medium in the filtration tank, and hot water heated to a predetermined temperature by the hot water supply heat exchanger through the operation of the hot water solenoid valve and edge cut valve, heats the bath from the return passage through the bypass three-way valve. After supplying to the exchanger and further heating in the bath heat exchanger to make high-temperature water, it passes through the filtration tank through the drainage three-way valve from the upper going-out passage, and the hot water from the going-out passage to the bathtub through the forward and reverse three-way valve By supplying water, it goes to and from the filtration tank A high-temperature sterilization means for performing high-temperature sterilization, through the bypass three-way valve from the passageway return the hot water heated to a predetermined temperature in the hot-water supply heat exchanger by the operation of the hot water supply solenoid valve and edges Setsuben supplied to the bath heat exchanger, It is equipped with high-temperature sterilization means that performs high-temperature sterilization of the return passage by supplying high-temperature water from the return passage through the two-way valve to the bathtub after further heating to high temperature water in the bath heat exchanger When the high-temperature sterilization of high temperature sterilization of the filtration tank and the return passage or return passage, the hot water supplied from the hot water heat exchanger is lower than the high temperature water flowing through the filtration tank and the return passage or return passage, ensuring the safety of hot water supply. The temperature can be set.
[0008]
According to the above-described invention, dirt and bacteria accumulated in the bathtub are aggregated by energizing the electrodes in the filtration tank, and the aggregated dirt and bacteria are removed by the filter medium in the filtration tank, and the hot water supply temperature is not high-temperature water. Assures the safety of hot water supply as hot water, kills bacteria that have clumped in the filtration tank by high-temperature sterilization, and further kills bacteria in the forward and return passages by high-temperature sterilization of the going-out path and return path of the bath. Since the inner and outer passages and the return passage can always be kept clean, the bath water can be kept clean even when a plurality of people take a bath continuously or use the bath water continuously.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The present invention includes a hot water supply heat exchanger for heating water supplied from a water supply channel, a water temperature sensor for detecting a water supply temperature provided in the water supply channel, a water amount sensor for detecting a water supply flow rate, and a hot water temperature provided in a hot water supply channel. Hot water sensor to detect and water flow control valve to control the hot water flow rate, bath heat exchanger that heats the bath water supplied by the circulation pump via the return passage, and hot water heated by the bath heat exchanger is filtered An upper outgoing passage that is supplied to the bathtub from the outgoing passage via the tank, a lower outgoing passage that supplies hot water heated by the bath heat exchanger to the bathtub from the outgoing passage by bypassing the filtration tank, and the filtration tank A drainage three-way valve that is disposed on the inlet side and switches the flow path to the upper forward passage or drainage port, a forward and reverse three-way valve that is disposed on the outlet side of the filtration tank and switches the flow path to the lower forward passage or forward passage, and the bath heat Exchange A bypass passage that bypasses the upper outgoing passage and the lower outgoing passage to connect the branch passage to supply circulating hot water, and a bypass three-way valve that is disposed in the return passage and switches the passage to the bypass passage or the bath heat exchanger A hot water solenoid valve and an edge cut valve disposed in the hot water filling passage for supplying hot water heated by the hot water heat exchanger to the return passage, and a switching three-way valve for switching the hot water filling passage disposed in the return passage And a two-way valve for connecting hot water heated by the bath heat exchanger to the bathtub through the return passage, the hot water supply unit being connected to the return passage and the lower going passage, and the circulation pump The bath water is supplied from the return passage to the bath heat exchanger through the bypass three-way valve by the operation of the above, from the upper forward passage through the drainage three-way valve , through the filtration tank, and from the forward passage through the forward and reverse three-way valve. In the bathtub A purification means for forming a circulation path, aggregating foreign matter in the circulating water by energizing an electrode provided in the filtration tank, and removing the aggregated foreign matter with a filter medium in the filtration tank, the hot water solenoid valve and the edge Hot water heated to a predetermined temperature in the hot water supply heat exchanger by the operation of the shutoff valve is supplied to the bath heat exchanger through the bypass three-way valve from the return passage, and further heated in the bath heat exchanger to be heated with hot water. After that, the high-temperature sterilization of the filtration tank and the forward passage is performed by supplying high-temperature water from the upper passage to the bathtub through the drainage three-way valve and the forward and reverse three-way valve. The hot water heated to a predetermined temperature by the hot water supply heat exchanger by the operation of the sterilization means, the hot water supply electromagnetic valve and the edge cut-off valve is supplied from the return passage to the bath heat exchanger via the bypass three-way valve , and the bath heat After further heating with an exchanger to high temperature water A high-temperature sterilization means for performing high-temperature sterilization of the return passage by supplying high-temperature water from the lower passage to the bathtub through a two-way valve, and the high-temperature sterilization means provides a filtration tank and a forward passage or a return passage. When the high temperature sterilization is performed, the hot water supplied from the hot water supply heat exchanger is set to a temperature at which the safety of hot water supply can be ensured lower than the high temperature water flowing through the filtration tank and the forward passage or the return passage.
[0010]
Then, the dirt and bacteria accumulated in the bathtub are aggregated by energizing the electrodes in the filtration tank, and the aggregated dirt and bacteria are removed with the filter medium in the filtration tank, and the hot water supply temperature is not hot water but hot water. Ensures safety, kills bacteria that have clumped in the filtration tank by high-temperature sterilization, and further kills bacteria in the forward and return passages by sterilizing the going-out path and return path of the bath, in the filtration tank and the forward path Because the return passage is always kept clean, the bath water can be kept clean even if multiple people take a bath continuously or use the bath water continuously.
[0011]
Further, after completion of the high-temperature sterilization means of the specified return passage to claim 1, the circulation pump is operated, supplying hot water return passage via a switching three-way valve from the return passage to the bath heat exchanger the bypass three-way valve Then, a forced circulation circuit is formed via a two-way valve from the lower outgoing passage, and high temperature sterilization means for performing high temperature sterilization of the forced circulation circuit formed inside the device is provided, thereby being formed inside the device. To sterilize the circulation circuit including the return passage to kill bacteria in the return passage inside the device and keep the return passage clean, multiple people can continue to bathe or use the water in the bathtub continuously. Even so, the bathtub water can be kept clean.
[0012]
Further, the high-temperature sterilization means of the forced circulation circuit formed inside the device according to claim 2 is a high-temperature sterilization means for heating with a bath heat exchanger until the circulating water temperature detected by the bath sensor reaches a predetermined high temperature. By sterilizing the circulation circuit including the return passage formed inside the device, killing bacteria in the return passage inside the device, and keeping the return passage always clean, multiple people can bathe in succession, Even if the bath water is used continuously, the bath water can be kept clean.
[0013]
Embodiments of the present invention will be described below with reference to the drawings.
In addition, the same code | symbol is provided about the same part as the bath water heater of the prior art example shown in FIG.
[0014]
FIG. 1 shows an embodiment of the present invention, wherein water passes through a water amount sensor 1 and a water temperature sensor 2 from a water supply port, absorbs heat by a hot water supply heat exchanger 3, passes through a hot water supply sensor 4 and a hot water supply water amount control valve 5, It is discharged from the hot water outlet. The gas passes through the hot water supply source solenoid valve 6 and the gas hot water supply proportional valve 7 from the gas inlet, and is combusted by the hot water supply burner 8.
[0015]
Bath water is supplied by a circulation pump 9 to a bath connection adapter 10, a return passage 11, a water level sensor 12, a switching three-way valve 13, a bath sensor 14, a water flow switch 15, a bypass three-way valve 23, a bath heat exchanger 16, an upper outgoing passage 24, It circulates with the drainage three-way valve 25, the filter tank 28 provided with the filter medium 26 and the aluminum electrode 27, the forward / reverse three-way valve 29, the forward passage 17, and the bath connection adapter 10. When the hot water temperature detected by the bath sensor 14 of the bath water drops, the gas passes through the gas bath source solenoid valve 18 and the bath proportional valve 19, burns in the bath burner 20, and absorbs heat in the bath heat exchanger 16. Retreat the bathtub water.
[0016]
The hot water that has been absorbed by the hot water supply heat exchanger 3 passes through the hot water supply sensor 4, the hot water supply amount control valve 5, the hot water electromagnetic valve 21, the edge cut valve 22, the forward passage 17, and the bath return passage 11. The bath connection adapter 10 enters the bathtub. 29 is a forward / reverse three-way valve provided in the lower forward passage 30, 31 is a two-way valve, 32 is a bypass passage, and 33 is a drain.
[0017]
Example 1
FIG. 2 shows the purification means in the first embodiment of the present invention. When the circulating pump 9 is set to “weak operation” and the circulating water passes through the filtration tank 28, the aluminum electrode 27 in the filtration tank 28 is energized. The dirt and bacteria accumulated in the bathtub are combined with aluminum hydroxide and aggregated. The aggregated foreign matter can be removed by the filter medium 26 in the filter tank 28, and the purification operation of the bathtub is continued unless the operation switch is turned off. Therefore, the bathtub water can always be cleaned, and even when a plurality of people take a bath continuously or use the bathtub water continuously, the cleanliness can be maintained.
[0018]
FIG. 3 shows the high temperature sterilization means of the outgoing passage in the first embodiment of the present invention, which is about 50 ° C. heated by the hot water supply heat exchanger 3 under the control of the water temperature sensor 1, the water amount sensor 2, the hot water supply sensor 4 and the water amount control valve 5. Then, 6 liters of hot water is supplied from the hot water supply solenoid valve 21 and the edge cut valve 22 to the bypass three-way valve 23 and the bath heat exchanger 16, and further heated by the bath heat exchanger 16 to a high temperature water of about 75 ° C. By flowing into the passage 24, the drainage three-way valve 25, the filtration tank 28, the forward / reverse three-way valve 29, and the forward passage 17, the filtration tank 28 and the forward pipe are sterilized at a high temperature, so that the germs in the filtration tank 28 and the forward pipe are heated at a high temperature. By sterilizing and killing, the filtration tank 28 and the outgoing pipe can be kept clean, and the hot water supply temperature is not high-temperature water but hot water of about 50 ° C., and the safety of hot water supply during sterilization operation can be ensured.
[0019]
FIG. 4 shows the high temperature sterilization means of the return passage in the first embodiment of the present invention, which is about 50 ° C. heated by the hot water supply heat exchanger 3 under the control of the water temperature sensor 1, the water amount sensor 2, the hot water supply sensor 4 and the water amount control valve 5. Then, 6 liters of hot water is supplied from the hot water supply solenoid valve 21 and the edge cut valve 22 to the bypass three-way valve 23 and the bath heat exchanger 16, and further heated by the bath heat exchanger 16 to a high temperature water of about 75 ° C. By flowing into the passage 30, the two-way valve 31, and the return passage 11 and sterilizing the return pipe at a high temperature, the return pipe can be kept clean by sterilizing and killing the germs in the return pipe at a high temperature. The temperature is not high-temperature water but hot water of about 50 ° C., and the safety of hot water supply during sterilization operation can be ensured.
[0020]
(Example 2)
FIG. 5 shows the high temperature sterilization means for the return passage inside the apparatus in Embodiment 2 of the present invention. The high temperature water in the return passage 11 is switched from the return passage 11 to the three-way valve 13, the circulation pump 9, the bypass three-way valve 23, and the bath heat exchange. By flowing into the vessel 16 and performing high temperature sterilization of the return passage inside the device, the return passage inside the device can be kept clean by sterilizing the germs in the return pipe inside the device at a high temperature and killing them.
[0021]
(Example 3)
FIG. 6 shows high-temperature sterilization means in Embodiment 3 of the present invention, in which high-temperature water in the return passage 11 is flowed from the return passage 11 to the switching three-way valve 13, the circulation pump 9, the bypass three-way valve 23, and the bath heat exchanger 16. The bath 14 is heated by the bath heat exchanger 16 until the hot water in the return passage inside the device reaches 75 ° C. by the sensor 14, and the return passage inside the device is sterilized at a high temperature, thereby sterilizing the germs in the return pipe inside the device at a high temperature. By killing it, the return path inside the device can be kept clean.
[0022]
【The invention's effect】
As described above, according to the invention according to claim 1, the dirt and bacteria accumulated in the bathtub are aggregated by energizing the electrode in the filtration tank, and the aggregated dirt and bacteria are removed by the filtering material in the filtration tank. The hot water supply temperature is not hot water but hot water, ensuring the safety of hot water supply. By sterilizing the bacteria in the filter tank, the outgoing pipe and the return pipe by high temperature sterilization, the inside of the filter tank can always be kept clean. Therefore, the bath water can be kept clean even if a plurality of people take a bath continuously or use the bath water continuously.
[0023]
Further, according to the invention according to claim 2, in addition to the effect of the invention according to claim 1, the return passage can be sterilized more strongly at a high temperature using a bath heat exchanger, Furthermore, according to the invention described in claim 3, it is possible to reliably perform high-temperature sterilization in the return passage by utilizing the bath sensor.
[Brief description of the drawings]
FIG. 1 is a block diagram of a bath water heater in an embodiment of the present invention. FIG. 2 (a) is a block diagram of a bath water heater showing a purifying means in Embodiment 1 of the present invention. FIG. 4A is a flow chart of the bath water heater showing the high temperature sterilization means of the outgoing passage in the first embodiment of the present invention. FIG. 4A is a diagram showing the high temperature of the return passage in the first embodiment of the bath water heater of the present invention. Fig. 5B is a flow chart of the bath water heater showing the sterilizing means. Fig. 5 is a block diagram of the bath water heater showing the high temperature sterilizing means of the return passage in the second embodiment of the present invention. Fig. 6 is a third embodiment of the present invention. Block diagram of bath water heater showing the high temperature sterilization means of the return passage in FIG.
DESCRIPTION OF SYMBOLS 1 Water quantity sensor 2 Water temperature sensor 3 Hot water supply heat exchanger 4 Hot water supply sensor 5 Water quantity control valve 8 Hot water supply burner 9 Circulation pump 11 Return passage 12 Water level sensor 13 Switching three-way valve 14 Bath sensor 15 Water flow switch 16 Bath heat exchanger 17 Outward passage 20 Bath Burner 21 Hot water supply solenoid valve 22 Edge cut valve 23 Bypass three-way valve 24 Upper discharge passage 25 Drainage three-way valve 26 Filter material 27 Aluminum electrode 28 Filtration tank 29 Forward / reverse three-way valve 30 Lower discharge passage 31 Two-way valve

Claims

A hot water supply heat exchanger for heating water supplied from the water supply channel, a water temperature sensor for detecting the temperature of the water supply provided in the water supply channel, a water amount sensor for detecting the flow rate of the water supply, and a hot water supply sensor for detecting the temperature of the hot water provided in the hot water supply channel And a water amount control valve for controlling the flow rate of the hot water, a bath heat exchanger for heating the bath water supplied by the circulation pump via the return passage, and the hot water heated by the bath heat exchanger via the filtration tank. Located on the inlet side of the filtration tank, an upper passage for supplying the bathtub from the forward passage, a lower passage for supplying hot water heated by the bath heat exchanger to the bathtub by bypassing the filtration tank, and the filtration tank A drainage three-way valve that switches the flow path to the upper forward passage or drainage port, a forward / reverse three-way valve that is disposed on the outlet side of the filtration tank and switches the flow path to the lower forward passage or forward passage, and the bath heat exchanger are bypassed. A bypass passage connected to a branch point of the upper forward passage and the lower forward passage to supply circulating hot water, a bypass three-way valve disposed in the return passage and switching the flow passage to the bypass passage or the bath heat exchanger, A hot water solenoid valve and an edge cut valve arranged in the hot water filling passage for supplying hot water heated by the hot water heat exchanger to the return passage, a switching three-way valve arranged in the return passage and switching the hot water filling passage, A bath water heater comprising a two-way valve that communicates the return passage and the lower going passage and supplies hot water heated by the bath heat exchanger to the bathtub through the return passage, and the operation of the circulation pump The bath water is supplied to the bath heat exchanger from the return passage through the bypass three-way valve, and from the upper forward passage through the drainage three-way valve through the filtration tank, and from the forward passage to the bathtub through the forward and reverse three-way valve. Return circulation A purification means for aggregating foreign matter in the circulating water by energizing an electrode provided in the filtration tank, and removing the agglomerated foreign matter with a filter medium in the filtration tank; and the hot water solenoid valve and the edge cut-off valve Hot water heated to a predetermined temperature by the hot water supply heat exchanger by operation is supplied to the bath heat exchanger through the bypass three-way valve from the return passage, and further heated to high temperature water by the bath heat exchanger, High-temperature sterilization means that performs high-temperature sterilization of the filtration tank and the forward passage by supplying high-temperature water from the upper passage to the bathtub through the drainage three-way valve and the forward and reverse three-way valve. The hot water heated to a predetermined temperature by the hot water heat exchanger by the operation of the hot water solenoid valve and the edge cut valve is supplied from the return passage to the bath heat exchanger via the bypass three-way valve , and the bath heat exchanger After further heating to hot water, go to the bottom A high-temperature sterilization means for performing high-temperature sterilization of the return passage by supplying high-temperature water from the return passage to the bathtub through a two-way valve, and the high-temperature sterilization means for the filtration tank and the forward passage or the return passage by the high-temperature sterilization means. When performing hot water supply, the hot water supplied from the hot water supply heat exchanger is lower than the high-temperature water flowing through the filtration tank and the return passage or return passage, and the bath water heater is set at a temperature that can ensure the safety of hot water supply.

After completion of the high temperature sterilization means of the return passage specified in claim 1, the circulating pump is operated, and the high temperature water of the return passage is supplied from the return three-way valve to the bath heat exchanger via the switching three-way valve, 2. The bath according to claim 1, further comprising a high-temperature sterilization means for forming a forced circulation circuit from a lower going path through a two-way valve and performing high-temperature sterilization of the forced circulation circuit formed inside the device. Water heater.

The high-temperature sterilization means of the forced circulation circuit formed inside the device according to claim 2 is a high-temperature sterilization means for heating with a bath heat exchanger until the circulating water temperature detected by the bath sensor reaches a predetermined high temperature. The bath water heater according to claim 2.