JP3633054B2

JP3633054B2 - Hot water storage water heater

Info

Publication number: JP3633054B2
Application number: JP24287095A
Authority: JP
Inventors: 竹司渡辺
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 1995-09-21
Filing date: 1995-09-21
Publication date: 2005-03-30
Anticipated expiration: 2015-09-21
Also published as: JPH0989369A

Description

【０００１】
【産業上の利用分野】
本発明は風呂保温機能付きの貯湯式給湯装置に関するものである。
【０００２】
【従来の技術】
従来、この種の貯湯式給湯装置の第１の例のとしては実開平５−７３４５３号公報に示すようなものがある。図９において、風呂加熱用熱交換器２４および追い焚き用ヒータ２３を貯湯槽１の上部に設け、風呂加熱用熱交換器２４に導びかれてくる湯を追い焚き用ヒータ２３で所定温度まで再加熱するようになっている。
【０００３】
また、第２の例としては特開平５−１８４７号公報に示すようなものもある。図１０において、ヒータ２５で加熱する電気温水器１Ａと、浴槽７の水を加熱する追い焚きヒータ２６と追い焚きヒータ２６に浴槽水を循環するポンプ６とを備え、この追い焚きヒータ２６で風呂の追い焚きを行うようになっている。
【０００４】
【発明が解決しようとする課題】
しかしながら、上記従来の第１の例の構成では、貯湯槽からの出湯と風呂加熱運転が同時に行われると熱交換器２４近傍の貯湯湯温は低下して出湯温度が下がり、湯の使い勝手が悪い。また、湯が大量に使用された場合には、追い焚き用ヒータ２３の上部の水温が風呂加熱可能な温度まで昇温するのに時間を要するため、追い焚きに時間がかかる。
【０００５】
また、第２の例の構成では、電気温水器１Ａのヒータ２５と風呂の追い焚き用ヒータ２６を配設しているため、機器のコストが高くなるとともに電源の接続工事も多くなる。また、電気容量の観点から、ヒータ２５と風呂の追い焚き用ヒータ２６とは同時に通電しない制御が必要となる。
【０００６】
【課題を解決するための手段】
本発明は上記従来の課題を解決するもので、貯湯槽と、加熱器と、風呂用加熱器と、循環ポンプとを有し、前記加熱器により加熱された湯を前記循環ポンプにより前記貯湯槽に貯湯する貯湯運転と、前記加熱器により加熱された湯を前記循環ポンプにより前記風呂用加熱器に流入させることにより浴槽の水を加熱する風呂保温加熱運転とを流路切換手段により切り換え可能としたものであって、前記加熱器の出口湯温は貯湯運転時より風呂保温加熱運転時の方が低くなるように制御するものである。
【０００７】
また、請求項１記載の発明に加え、貯湯運転時と風呂保温加熱運転時とで循環ポンプの回転数を変化させるものである。
【０００８】
また、昼間電力の消費量を少なくして、電力負荷の平準化をはかり、同様に蓄熱剤の耐久性向上をはかるため、加熱器の下流に設けられた温度検知器と、流路切換手段の流路方向が貯湯槽側の場合には前記温度検知器の検出温度が第１の温度となるように循環ポンプの回転数を制御し、前記流路切換手段の流路方向が風呂用加熱器側の場合には前記温度検知器の検出温度が前記第１の温度より低い第２の温度となるように循環ポンプの回転数を制御する回転数制御器とを備えたものである。
【０００９】
また、同様に配管の凍結防止をはかるため、循環ポンプ、加熱器、流路切換手段、風呂用加熱器を接続した循環回路途中に設けられた温度検知器と、前記温度検知器が循環回路内の水が凍結温度に達したことを検出すると前記循環ポンプを通電するとともに前記流路切換手段の流路方向を前記風呂用加熱器側に切り換える制御を行う制御器とを備えたものである。
【００１０】
また、同様に貯湯運転を開始した場合に貯湯槽の残湯温度が低下することを防止するため、加熱器の下流に設けられた温度検知器と、運転開始後に前記温度検知器の信号を受けて流路切換手段の流路方向を貯湯槽側に切り換える制御を行う制御器と、風呂用加熱器と熱交換関係を有する蓄熱熱交換器を備えたものである。
【００１１】
また、同様に貯湯熱量の向上をはかるため、加熱器の下流に設けられを有し、貯湯運転終了間近になると、貯湯運転から風呂保温加熱運転へ切り換え制御する制御器とを備えたものである。
【００１２】
また、昼間電力の消費量を少なくして、電力負荷の平準化をはかるため、請求項１〜４いずれか１項に記載の発明に加え、風呂用加熱器と熱交換関係を有する蓄熱熱交換器を備えたものである。
【００１３】
また、前述の構成に加え、風呂保温加熱能力を確保するため、蓄熱熱交換器に設けた温度検知器と、前記温度検知器の信号を受けて加熱器を通電するとともに流路切換手段の流路方向を風呂用加熱器側に接続する制御器とを備えたものである。
【００１４】
【作用】
上記第１、２の構成によると、貯湯運転時は、貯湯槽下部から流入した低温の水は加熱器で所定温度に加熱され、流路切換手段を通って貯湯槽の上部に貯湯される。また、風呂保温加熱運転時には、加熱器で加熱された水が流路切換手段を通り、風呂用加熱器に流入し、ここで風呂循環用の水を加熱する。そして、温度低下した水は循環ポンプを通り、再度加熱器に流入し昇温される。従って、風呂の保温加熱運転中に貯湯槽から出湯されても出湯温度は変化しない。また、貯湯槽を沸き上げる大能力の加熱器で風呂加熱運転を行うため、短時間で追い焚き保温加熱が可能となる。さらに、単一加熱器で貯湯および風呂保温加熱ができるため、機器のコンパクト化、低コスト化、省施工化がはかれる。
【００１５】
上記第３の構成によれば、貯湯運転時は、流路切換手段の流路は加熱器から貯湯槽への流れ方向になっている。そして、加熱器の出口湯温が所定温度となるように制御器が温度検知器の第１信号（第１の温度）で循環ポンプの回転数を制御し、貯湯槽の上部に貯湯する。また、蓄熱運転時には、流路切換手段の流路は加熱器から風呂用加熱器への流れ方向になっている。そして、制御器は加熱器の出口湯温が第１信号より低温の第２信号（第２の温度）で循環ポンプの回転数を制御し、風呂用加熱器を介して蓄熱熱交換器を蓄熱する。従って、蓄熱剤の耐久性が確保できる所定温度で蓄熱できるようになり、信頼性が向上する。一方、貯湯運転時は高温湯が貯湯できるため、貯湯槽の小型化あるいは貯湯熱量の増大がはかれる。
【００１６】
上記第４の構成によれば、冬季の運転停止時において、循環ポンプ、加熱器、流路切換手段、風呂用加熱器を接続した循環回路内の水が凍結温度に達したことを温度検知器が検出する。そして、制御器は温度検知器の信号を受けて循環ポンプを通電するとともに流路切換手段の流路を風呂用加熱器側に切り換え、蓄熱熱交換器から受熱しながら循環回路内の水を循環させる。したがって、冬季の運転停止時において凍結することもない。
【００１７】
上記第５の構成によれば、運転開始後、加熱器から流出する湯温は少しづつ昇温し、所定温度に達したことを温度検知器が検出する。そして、制御器は温度検知器の信号を受けて流路切換手段を貯湯槽側に切り換える制御を行う。従って、運転開始時に貯湯温度に達しない中温水は蓄熱熱交換器に流入し、蓄熱を行い、所定温度に達した高温湯を貯湯槽の上部に流入させるため、残湯温度が低下することもない。
【００１８】
上記第６の構成によれば、貯湯運転において、貯湯槽の下部から流出する給水された低温水を加熱器で加熱する。そして、加熱器の出口温度が温度検知器の第１信号（第１の温度）となるように回転数制御器は循環ポンプの回転数を制御し、所定温度の湯が貯湯槽の上部に流入し、上から次第に貯湯されていく。そして、この運転中に、貯湯槽内では貯湯槽上部から流入した湯と給水されている水が熱伝導をともない湯と水が混合した中温水の混合層を形成する。そして、貯湯運転終了間近になると、この混合層が貯湯槽から流出しはじめ、加熱器に流入する。そのため、加熱器の出口温度を一定にするため循環ポンプの回転数を増加させる制御を回転数制御器は行い、最大回転数まで運転を継続する。そして、さらに、高温湯が加熱器に流入しはじめると、加熱器の出口温度は上昇しはじめる。これを温度検知器の第２信号（第２の温度）が検出し、制御器に信号を送り、制御器は風呂用加熱器側に流路切換手段の流路を切り換える。よって、加熱器から流出した湯は流路切換手段を通り、風呂用加熱器に流入し、蓄熱熱交換器で蓄熱される。従って、貯湯槽には下部まで高温湯が貯湯され、その後に蓄熱運転に切り変わるため、給湯負荷を満足する貯湯熱量が確保できる。
【００１９】
上記第７の構成によれば、深夜時間帯に加熱器で加熱した湯は風呂用加熱器に流入し、蓄熱熱交換器を蓄熱する。そして、昼間時間帯において、風呂保温加熱運転されると風呂循環用の水は蓄熱熱交換器に流入する。その際に蓄熱熱交換器は放熱して、循環水の加熱に利用される。よって、昼間時間帯に加熱器を運転することもなく、風呂保温加熱ができるため、昼間電力の消費量はなくなり、電力負荷の平準化が促進される。
【００２０】
上記第８の構成によれば、蓄熱熱交換器の蓄熱熱量が低下したことを温度検知器が検出し、その信号を制御器に送る。そして、制御器は加熱器を通電するとともに流路切換手段の流路方向を風呂用加熱器に切り換える。よって、加熱器で加熱された水が風呂用加熱器に流入し、蓄熱熱交換器に蓄熱されるため、風呂加熱能力は常に確保される。
【００２１】
【実施例】
以下本発明の第１の実施例を図１を参照して説明する。
【００２２】
図１において、１は貯湯槽、２は循環ポンプ、３は加熱器であり、ヒータなどが熱源となっている。４は風呂用加熱器であり、循環ポンプ２および加熱器３と並列に設けられている。５は流路切換え手段であり、加熱器３の下流に設けられ、流路を貯湯槽１側あるいは風呂用加熱器４側に切換える。そして、貯湯槽１の下部、加熱器３、流路切換え手段５、貯湯槽１の上部は順次接続されて給湯回路を構成する。６は風呂循環ポンプであり、風呂用加熱器４と浴槽７の循環経路内の水を循環させる。
【００２３】
上記構成において、最初に貯湯運転について述べる。貯湯槽１の下部の低温水は循環ポンプ２の作用で加熱器３に流入し、所定温度まで加熱される。そして、流路切換え手段５を通り、貯湯槽１の上部に流入し、貯湯される。この運転を繰り返しながら、貯湯槽１には上部からしだいに高温湯が貯湯されていく。次に、風呂保温加熱運転について述べる。この場合には、流路切換え手段５の流路方向は風呂用加熱器４側に切り換わっているため、加熱器３で加熱された湯は風呂用加熱器４に流入し、ここで、風呂循環ポンプ６から送られてきた浴槽７の水を加熱する。そして、風呂用加熱器４から流出した低温となった水は再度、加熱器３に流入し、加熱されて高温となる。この運転を繰り返しながら浴槽７の水温を所定温度に加熱する。
【００２４】
従って、風呂の保温加熱運転中に貯湯槽１から出湯されても出湯温度は変化しない。また、貯湯槽１を沸き上げる大能力の加熱器３を用いて風呂保温加熱運転を行うため、追い焚き時間が短時間となる。さらに、単一加熱器で貯湯および風呂保温加熱ができるため、機器のコンパクト化、低コスト化、省施工化がはかれる。また、図２において、流路切換え手段５の代わりに、加熱器３から貯湯槽１の配管途中に第１開閉弁５Ａ、加熱器３から風呂用加熱器４の配管途中に第２開閉弁５Ｂを設けて、貯湯運転時は第１開閉弁５Ａを開放するとともに第２開閉弁５Ｂを閉止し、風呂の保温加熱運転時は第１開閉弁５Ａを閉止するとともに第２開閉弁５Ｂを開放することによって同じ機能、作用が得られる。
【００２５】
つぎに、第２の実施例について説明する。図３において、第１の実施例と同じ機能、動作するものについては同一符号で表し、説明は省略する。８は蓄熱熱交換器であり、風呂用加熱器４と熱交換関係を有し、風呂循環ポンプ６で送られてくる浴槽７の水を加熱する。
【００２６】
上記構成において、最初に深夜時間帯における蓄熱運転について述べる。加熱器３で加熱された湯は風呂用加熱器４に流入し、風呂用加熱器４と熱交換関係にある蓄熱熱交換器８を蓄熱する。次に、昼間時間帯における風呂保温加熱運転について述べる。この場合には、風呂循環ポンプ６から送られてきた浴槽７の水は蓄熱熱交換器８に流入し、ここで蓄熱熱交換器８の熱を奪い昇温し、浴槽７にもどる。そしてこの運転を繰り返しながら、浴槽７内の湯は所定温度まで加熱される。従って、深夜時間帯に蓄熱された熱を昼間時間帯に風呂保温加熱に利用するため、昼間時間帯に加熱器３を運転する必要もなくなり、電力負荷の平準化がはかれる。
【００２７】
次に、第３の実施例について説明する。図４において、第１、第２の実施例と同じ機能、動作するものについては同一符号で表し、説明は省略する。９は温度検知器であり、蓄熱熱交換器８に設けられ、ここの検出温度に基づき信号を発生する。１０は制御器であり、温度検知器９の信号を受けて加熱器３を通電するとともに流路切換え手段５の流路方向を風呂用加熱器４側に切り換える。
【００２８】
上記構成において、最初に風呂保温加熱運転について述べる。風呂循環ポンプ６から送られてきた浴槽７の水は蓄熱熱交換器８に流入し、ここで蓄熱熱交換器８の熱を奪い昇温し、浴槽７にもどる。この運転を繰り返しながら、浴槽７内の湯は所定温度まで加熱される。一方、熱を奪われた蓄熱熱交換器８は蓄熱熱量が低下すると温度が下がる。それを温度検知器９が検知し、その信号を制御器１０に送り、加熱器３を通電するとともに、流路切換え手段５の流れ方向を風呂用加熱器４に切り換える。そして、加熱器３で加熱された湯は流路切換え手段５を通り、風呂用加熱器４に流入し、ここで風呂用加熱器４を介して蓄熱熱交換器８を蓄熱する。従って、常に蓄熱熱交換器８は蓄熱されているため、風呂保温加熱に必要な能力が確保される。
【００２９】
次に第４の実施例について説明する。図５において、第１、第２および第３の実施例と同じ機能、動作するものについては同一符号で表し、説明は省略する。１１は温度検知器であり、加熱器３の下流に設けられ、ここを流れる流体の検出温度に基づき第１の温度を示す第１信号と第１信号より低温の第２の温度を示す第２信号の複数の信号を発生する。１２は制御器であり、流路切換え手段５の流路方向が貯湯槽１側の場合には温度検知器１１の第１信号で、流路切換え手段５の流路方向が風呂用加熱器４側になっている場合には温度検知器１１の第２信号で循環ポンプ２の回転数を制御する。
【００３０】
上記構成において、最初に貯湯運転について述べる。この場合、流路切換手段５は加熱器３から貯湯槽１への流れ方向になっている。そして、制御器１２は加熱器３の出口湯温が所定温度となるように温度検知器１１の第１信号で循環ポンプ２の回転数を制御し、加熱器３から流出した高温湯を流路切換手段５を通り、貯湯槽１の上部に貯湯する。次に、蓄熱運転について述べる。この場合には、流路切換手段５は加熱器３から風呂用加熱器４への流れ方向になっている。そして、制御器１２は加熱器３の出口湯温が第１信号より低温の第２信号で循環ポンプ２の回転数を制御し、流路切換手段５を通り、風呂用加熱器４に流入して、蓄熱熱交換器８を蓄熱する。そして、風呂用加熱器４から流出した水は加熱器３に再度流入して、加熱される。つまり、流路切換手段の流路方向が貯湯槽側の場合には第１の信号に基づく第１の温度となるように、前記流路切換手段の流路方向が風呂用加熱器側の場合には前記第１の温度より低い第２の信号に基づく第２の温度となるように循環ポンプの回転数を制御する。従って、貯湯運転時には高温で沸き上げることが可能であり、貯湯槽１の小型化あるいは貯湯熱量の増大がはかれる。また、蓄熱運転時には蓄熱剤の耐久性が確保できる所定温度で蓄熱できるため、信頼性が向上する。
【００３１】
つぎに第５の実施例について説明する。図６において、第１、第２、第３および第４の実施例と同じ機能、動作するものについては同一符号で表し、説明は省略する。１３は温度検知器であり、循環ポンプ２、加熱器３、流路切換手段５、風呂用加熱器５を接続した循環回路途中に設けられ、ここの温度を検出して信号を発生する。１４は制御器であり、温度検知器１３の信号を受けて循環ポンプ２を通電するとともに流路切換手段５の媒体流れ方向を風呂用加熱器４側に切り換える制御を行う。
【００３２】
上記構成において、冬季の運転停止時において、循環ポンプ２、加熱器３、流路切換え手段５、風呂用加熱器４を接続した循環回路内の水が凍結温度に達したことを温度検知器１３が検出する。そして、制御器１４は温度検知器１３の信号を受けて循環ポンプ２を通電するとともに流路切換手段５を風呂用加熱器４側に切り換え、蓄熱熱交換器８から受熱しながら循環回路内の水を循環させる。したがって、冬季の運転停止時において凍結することはない。
【００３３】
つぎに第６の実施例について説明する。図７において、第１、第２、第３、第４および第５の実施例と同じ機能、動作するものについては同一符号で表し、説明は省略する。１５は温度検知器であり、加熱器３の下流に設けられ、ここを流れる水の温度を検出して、信号を発生する。１６は制御器であり、運転開始後に温度検知器１５の信号を受けて流路切換手段５の媒体流れ方向を貯湯槽１側に切り換える制御を行う。
【００３４】
上記構成において、運転開始後、加熱器３から流出する湯温は少しづつ昇温し、所定温度に達したことを温度検知器１５が検出する。そして、制御器１６は温度検知器１５の信号を受けて流路切換え手段５を貯湯槽１側に切り換える制御を行う。そして、加熱器３で加熱された所定温度の湯が貯湯槽１に貯湯される。従って、運転開始時に貯湯温度に達しない中温水は蓄熱熱交換器８に流入し、蓄熱を行う。また、所定温度に達した高温湯が貯湯槽１の上部に流入するため、残湯温度が低下することはない。
【００３５】
つぎに第７の実施例について説明する。図８において、第１、第２、第３、第４、第５および第６の実施例と同じ機能、動作するものについては同一符号で表し、説明は省略する。１７は温度検知器であり、加熱器３の下流に設けられ、ここを流れる水の温度を検出する第１信号と第１信号より高温の第２信号の複数の信号を発生する。１８は回転数制御器であり、温度検知器１７の第１信号を受けて循環ポンプ２の回転数制御を行う。１９は制御器であり、温度検知器１７の第２信号を受けて流路切換え手段５の媒体流れ方向を風呂用加熱器４側に切り換える制御を行う。
【００３６】
上記構成において、貯湯運転時、貯湯槽１の下部から流出する給水された低温水を加熱器３で加熱する。そして、加熱器３の出口温度が温度検知器１７の第１信号となるように回転数制御器１８は循環ポンプ２の回転数を制御し、所定温度の湯が貯湯槽１の上部に流入し、上から次第に貯湯されていく。そして、この運転中に、貯湯槽１内では上部から流入した湯と給水されている水が熱伝導をともない湯と水が混合した中温水の混合層を形成する。そして、沸き上げ運転終了間近になると、この混合層が貯湯槽１から流出しはじめ、加熱器３に流入する。そのため、加熱器３の出口温度を一定にするため循環ポンプ２の回転数を増加させる制御を回転数制御器１８は行い、最大回転数まで運転を継続する。そして、さらに高温の湯が加熱器３に流入しはじめると、加熱器３の出口温度は上昇しはじめる。これを温度検知器１７の第２信号が検出し、制御器１９に信号を送り、制御器１９は流路切換手段５の流路方向を風呂用加熱器４側に換える。よって、加熱器３から流出した湯は流路切換手段５を通り、風呂用加熱器４に流入し、蓄熱熱交換器８で蓄熱される。従って、貯湯槽１には下部まで高温湯が貯湯され、その後に蓄熱運転に切り変わるため、給湯負荷を満足する貯湯熱量が確保できる。
【００３７】
【発明の効果】
以上の説明から明らかのように本発明の貯湯式給湯装置によれば、貯湯運転時は、貯湯槽下部から流入した低温の水は加熱器で所定温度に加熱され、流路切換手段を通って貯湯槽の上部に貯湯される。また、風用保温加熱運転時には、加熱器で加熱された水が流路切換手段を通り、風呂用加熱器に流入し、ここで風呂循環用の水を加熱する。そして、温度低下した風呂用加熱器から流出した水は循環ポンプを通り、再度、加熱器に流入し昇温される。従って、出湯中に風呂の保温加熱運転されても出湯温度は変化しない。
【００３８】
そして、貯湯槽を沸き上げる大能力の加熱器で風呂保温加熱運転を行うため、追い焚き時間は短時間となり、さらに、単一加熱器で貯湯および風呂保温加熱ができるため、機器のコンパクト化、低コスト化、省施工化がはかれる。
【図面の簡単な説明】
【図１】本発明の第１の実施例における貯湯式給湯装置の構成図
【図２】同装置の流路切換手段を示す構成図
【図３】本発明の第２の実施例における貯湯式給湯装置の構成図
【図４】本発明の第３の実施例における貯湯式給湯装置の構成図
【図５】本発明の第４の実施例における貯湯式給湯装置の構成図
【図６】本発明の第５の実施例における貯湯式給湯装置の構成図
【図７】本発明の第６の実施例における貯湯式給湯装置の構成図
【図８】本発明の第７の実施例における貯湯式給湯装置の構成図
【図９】従来の貯湯式給湯装置の構成図
【図１０】従来の他の貯湯式給湯装置の構成図
【符号の説明】
１貯湯槽
２循環ポンプ
３加熱器
４風呂用加熱器
５流路切換え手段
５Ａ第１開閉弁
５Ｂ第２開閉弁
６風呂循環ポンプ
７浴槽
８蓄熱熱交換器
９、１１、１３、１５、１７温度検知器
１０、１２、１４、１６、１９制御器
１８回転数制御器[0001]
[Industrial application fields]
The present invention relates to a hot water storage type hot water supply apparatus having a bath heat retaining function.
[0002]
[Prior art]
Conventionally, a first example of this type of hot water storage type hot water supply apparatus is shown in Japanese Utility Model Laid-Open No. 5-73453. In FIG. 9, a bath heating heat exchanger 24 and a reheating heater 23 are provided in the upper portion of the hot water tank 1, and hot water introduced to the bath heating heat exchanger 24 is heated to a predetermined temperature by the reheating heater 23. It is designed to reheat.
[0003]
A second example is disclosed in Japanese Patent Laid-Open No. 5-1847. In FIG. 10, an electric water heater 1 </ b> A that is heated by a heater 25, a reheating heater 26 that heats water in the bathtub 7, and a pump 6 that circulates bathtub water to the reheating heater 26 are provided. It has come to perform the rebellion.
[0004]
[Problems to be solved by the invention]
However, in the configuration of the first conventional example described above, when the hot water from the hot water storage tank and the bath heating operation are performed simultaneously, the hot water temperature in the vicinity of the heat exchanger 24 is lowered, the hot water temperature is lowered, and the convenience of hot water is poor. . Further, when a large amount of hot water is used, it takes time for the water temperature at the top of the reheating heater 23 to rise to a temperature at which the bath can be heated.
[0005]
Further, in the configuration of the second example, since the heater 25 of the electric water heater 1A and the heater 26 for bathing are disposed, the cost of the equipment is increased and the power supply connection work is increased. Further, from the viewpoint of electric capacity, it is necessary to control the heater 25 and the bath heater 26 so as not to energize at the same time.
[0006]
[Means for Solving the Problems]
The present invention solves the above-described conventional problems, and includes a hot water storage tank, a heater, a bath heater, and a circulation pump, and hot water heated by the heater is supplied to the hot water storage tank by the circulation pump. It is possible to switch between the hot water storage operation for storing hot water and the bath heat insulation heating operation for heating the water in the bathtub by flowing the hot water heated by the heater into the bath heater by the circulation pump. Therefore, the outlet hot water temperature of the heater is controlled so as to be lower during the bath heat insulation heating operation than during the hot water storage operation .
[0007]
Further, in addition to the invention described in claim 1, the rotational speed of the circulation pump is changed between the hot water storage operation and the bath heat insulation heating operation.
[0008]
Moreover, by reducing the consumption of daytime power, measure the leveling power load, for improving the durability of the same heat storage agent, and temperature detector provided downstream of the heater, the passage switching device When the direction of the flow path is on the hot water storage tank side, the rotational speed of the circulation pump is controlled so that the temperature detected by the temperature detector becomes the first temperature, and the flow path direction of the flow path switching means is the heating for the bath. In the case of the vessel side, a rotation speed controller for controlling the rotation speed of the circulation pump so that the temperature detected by the temperature detector becomes a second temperature lower than the first temperature is provided.
[0009]
Similarly, in order to prevent the pipe from freezing, a temperature detector provided in the circulation circuit to which a circulation pump, a heater, a flow path switching means, a bath heater are connected, and the temperature detector are disposed in the circulation circuit. And a controller for controlling to switch the flow path direction of the flow path switching means to the bath heater side when energizing the circulating pump when it is detected that the water has reached the freezing temperature .
[0010]
Similarly, in order to prevent the remaining hot water temperature in the hot water tank from decreasing when the hot water storage operation is started, a temperature detector provided downstream of the heater and a signal from the temperature detector after the start of operation are received. And a heat storage heat exchanger having a heat exchange relationship with the bath heater and a controller for controlling the flow direction of the flow path switching means to the hot water storage tank side.
[0011]
Similarly, in order to improve the amount of heat stored in the hot water, it is provided downstream of the heater and includes a controller that controls switching from the hot water storage operation to the bath heat insulation heating operation when the hot water storage operation is about to end. .
[0012]
In addition to reducing the amount of daytime power consumption and leveling the power load, in addition to the invention according to any one of claims 1 to 4, heat storage heat exchange having a heat exchange relationship with a bath heater It is equipped with a vessel .
[0013]
In addition to the above-described configuration, in order to ensure the bath heat-retention capability, the temperature detector provided in the heat storage heat exchanger, and the heater is energized in response to the signal from the temperature detector, and the flow of the flow path switching means. And a controller for connecting the road direction to the bath heater side.
[0014]
[Action]
According to the first and second configurations, during the hot water storage operation, the low-temperature water flowing from the lower part of the hot water tank is heated to a predetermined temperature by the heater, and is stored in the upper part of the hot water tank through the flow path switching means. Moreover, at the time of bath insulation heating operation, the water heated by the heater passes through the flow path switching means and flows into the bath heater, where the water for bath circulation is heated. Then, the water whose temperature has decreased passes through the circulation pump and flows into the heater again to be heated. Therefore, even if the hot water is discharged from the hot water storage tank during the heat insulation and heating operation of the bath, the hot water temperature does not change. In addition, since the bath heating operation is performed with a large-capacity heater that boils the hot water storage tank, it is possible to reheat and keep warm in a short time. Furthermore, since the hot water can be stored and the bath can be heated with a single heater, the device can be made compact, low in cost and reduced in construction.
[0015]
According to the third configuration, during the hot water storage operation, the flow path of the flow path switching means is in the flow direction from the heater to the hot water storage tank. And a controller controls the rotation speed of a circulation pump with the 1st signal (1st temperature) of a temperature detector so that the outlet hot water temperature of a heater may become predetermined temperature, and stores hot water on the upper part of a hot water storage tank. Further, during the heat storage operation, the flow path of the flow path switching means is in the flow direction from the heater to the bath heater. The controller controls the number of rotations of the circulation pump with the second signal (second temperature) at which the outlet hot water temperature of the heater is lower than the first signal, and stores the heat storage heat exchanger via the bath heater. To do. Therefore, heat can be stored at a predetermined temperature at which the durability of the heat storage agent can be ensured, and the reliability is improved. On the other hand, since hot water can be stored during hot water storage operation, the hot water tank can be downsized or the amount of stored hot water can be increased.
[0016]
According to the fourth configuration, when the operation is stopped in winter, the temperature detector indicates that the water in the circulation circuit connected to the circulation pump, the heater, the flow path switching means, and the bath heater has reached the freezing temperature. Will detect. The controller receives a signal from the temperature detector, energizes the circulation pump, switches the flow path of the flow path switching means to the bath heater side, and circulates water in the circulation circuit while receiving heat from the heat storage heat exchanger. Let Therefore, it does not freeze when the operation is stopped in winter.
[0017]
According to the fifth configuration, the temperature of the hot water flowing out of the heater gradually increases after the operation is started, and the temperature detector detects that the temperature has reached a predetermined temperature. And a controller performs control which receives the signal of a temperature detector and switches a flow-path switching means to the hot water storage tank side. Therefore, the hot water that does not reach the hot water storage temperature at the start of operation flows into the heat storage heat exchanger, stores the heat, and the hot water that has reached the predetermined temperature flows into the upper part of the hot water storage tank. Absent.
[0018]
According to the sixth configuration, in the hot water storage operation, the supplied low-temperature water flowing out from the lower part of the hot water tank is heated by the heater. Then, the rotation speed controller controls the rotation speed of the circulation pump so that the outlet temperature of the heater becomes the first signal (first temperature) of the temperature detector, and hot water of a predetermined temperature flows into the upper part of the hot water tank. The hot water is gradually stored from above. During this operation, the hot water flowing in from the upper part of the hot water storage tank and the supplied water form a mixed layer of hot water and water with heat conduction in the hot water storage tank. When the hot water storage operation is about to end, the mixed layer begins to flow out of the hot water tank and flows into the heater. Therefore, the rotation speed controller performs control to increase the rotation speed of the circulation pump in order to make the outlet temperature of the heater constant, and the operation is continued up to the maximum rotation speed. Further, when hot water starts to flow into the heater, the outlet temperature of the heater starts to rise. This is detected by the second signal (second temperature) of the temperature detector, and a signal is sent to the controller. The controller switches the flow path of the flow path switching means to the bath heater side. Therefore, the hot water flowing out from the heater passes through the flow path switching means, flows into the bath heater, and is stored in the heat storage heat exchanger. Therefore, hot water is stored in the hot water storage tank up to the lower part and then switched to the heat storage operation, so that the amount of stored hot water satisfying the hot water supply load can be secured.
[0019]
According to the said 7th structure, the hot water heated with the heater at midnight time flows in into the heater for baths, and heat-stores a thermal storage heat exchanger. In the daytime period, when the bath is kept warm and heated, the water for bath circulation flows into the heat storage heat exchanger. At that time, the heat storage heat exchanger dissipates heat and is used for heating the circulating water. Therefore, since the bath can be kept warm without operating the heater during the daytime, the consumption of daytime power is eliminated and the leveling of the power load is promoted.
[0020]
According to the eighth configuration, the temperature detector detects that the amount of heat stored in the heat storage heat exchanger has decreased, and sends the signal to the controller. Then, the controller energizes the heater and switches the channel direction of the channel switching means to the bath heater. Therefore, water heated by the heater flows into the bath heater and is stored in the heat storage heat exchanger, so that the bath heating capability is always ensured.
[0021]
【Example】
A first embodiment of the present invention will be described below with reference to FIG.
[0022]
In FIG. 1, 1 is a hot water tank, 2 is a circulation pump, 3 is a heater, and a heater or the like serves as a heat source. Reference numeral 4 denotes a bath heater, which is provided in parallel with the circulation pump 2 and the heater 3. Reference numeral 5 denotes a flow path switching means, which is provided downstream of the heater 3 and switches the flow path to the hot water tank 1 side or the bath heater 4 side. And the lower part of the hot water tank 1, the heater 3, the flow path switching means 5, and the upper part of the hot water tank 1 are sequentially connected to constitute a hot water supply circuit. A bath circulation pump 6 circulates water in the circulation path of the bath heater 4 and the bathtub 7.
[0023]
In the above configuration, the hot water storage operation will be described first. The low temperature water in the lower part of the hot water tank 1 flows into the heater 3 by the action of the circulation pump 2 and is heated to a predetermined temperature. Then, it passes through the flow path switching means 5 and flows into the upper part of the hot water tank 1 to be stored. While repeating this operation, hot water is gradually stored in the hot water tank 1 from above. Next, the bath insulation heating operation will be described. In this case, since the flow path direction of the flow path switching means 5 is switched to the bath heater 4 side, the hot water heated by the heater 3 flows into the bath heater 4, where Water in the bathtub 7 sent from the circulation pump 6 is heated. And the water which became low temperature which flowed out from the heater 4 for baths flows into the heater 3 again, is heated, and becomes high temperature. The water temperature of the bathtub 7 is heated to a predetermined temperature while repeating this operation.
[0024]
Therefore, even if the hot water is discharged from the hot water storage tank 1 during the heat insulation heating operation of the bath, the hot water temperature does not change. Moreover, since the bath heat insulation heating operation is performed using the large-capacity heater 3 that boils the hot water tank 1, the reheating time is short. Furthermore, since the hot water can be stored and the bath can be heated with a single heater, the device can be made compact, low in cost and reduced in construction. In FIG. 2, instead of the flow path switching means 5, the first on-off valve 5 </ b> A is provided in the middle of the piping from the heater 3 to the hot water tank 1, and the second on-off valve 5 </ b> B is provided in the middle of the piping from the heater 3 to the bath heater 4. During the hot water storage operation, the first on-off valve 5A is opened and the second on-off valve 5B is closed. During the warming and heating operation of the bath, the first on-off valve 5A is closed and the second on-off valve 5B is opened. The same function and action can be obtained.
[0025]
Next, a second embodiment will be described. In FIG. 3, the same functions and operations as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. A heat storage heat exchanger 8 has a heat exchange relationship with the bath heater 4 and heats the water in the bathtub 7 sent by the bath circulation pump 6.
[0026]
In the above configuration, the heat storage operation in the midnight time zone will be described first. Hot water heated by the heater 3 flows into the bath heater 4 and stores the heat storage heat exchanger 8 in a heat exchange relationship with the bath heater 4. Next, bath warming heating operation in daytime hours will be described. In this case, the water in the bathtub 7 sent from the bath circulation pump 6 flows into the heat storage heat exchanger 8, where the heat of the heat storage heat exchanger 8 is removed and the temperature is raised, and the water returns to the bathtub 7. And while repeating this driving | operation, the hot water in the bathtub 7 is heated to predetermined temperature. Therefore, since the heat stored in the midnight time zone is used for the heat insulation of the bath in the daytime time zone, it is not necessary to operate the heater 3 in the daytime time zone, and the power load is leveled.
[0027]
Next, a third embodiment will be described. In FIG. 4, the same functions and operations as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted. A temperature detector 9 is provided in the heat storage heat exchanger 8 and generates a signal based on the detected temperature. A controller 10 receives a signal from the temperature detector 9 to energize the heater 3 and switches the flow path direction of the flow path switching means 5 to the bath heater 4 side.
[0028]
In the above configuration, first, the bath insulation heating operation will be described. The water in the bathtub 7 sent from the bath circulation pump 6 flows into the heat storage heat exchanger 8, where the heat of the heat storage heat exchanger 8 is removed and the temperature is raised, and the water returns to the bathtub 7. While repeating this operation, the hot water in the bathtub 7 is heated to a predetermined temperature. On the other hand, the temperature of the heat storage heat exchanger 8 that has been deprived of heat decreases as the amount of stored heat decreases. The temperature detector 9 detects this, sends a signal to the controller 10, energizes the heater 3, and switches the flow direction of the flow path switching means 5 to the bath heater 4. The hot water heated by the heater 3 flows through the flow path switching means 5 and flows into the bath heater 4, where the heat storage heat exchanger 8 is stored through the bath heater 4. Accordingly, since the heat storage heat exchanger 8 is always stored, the capacity necessary for bath heat insulation heating is ensured.
[0029]
Next, a fourth embodiment will be described. In FIG. 5, the same functions and operations as those of the first, second and third embodiments are denoted by the same reference numerals, and the description thereof is omitted. Reference numeral 11 denotes a temperature detector, which is provided downstream of the heater 3, and based on the detected temperature of the fluid flowing therethrough, a first signal indicating a first temperature and a second temperature indicating a second temperature lower than the first signal . Generate a plurality of signals. Reference numeral 12 denotes a controller. When the flow path direction of the flow path switching means 5 is on the hot water tank 1 side, the flow direction of the flow path switching means 5 is the heater 4 for the bath. If it is, the rotation speed of the circulation pump 2 is controlled by the second signal of the temperature detector 11.
[0030]
In the above configuration, the hot water storage operation will be described first. In this case, the flow path switching means 5 is in the flow direction from the heater 3 to the hot water tank 1. Then, the controller 12 controls the number of revolutions of the circulation pump 2 by the first signal of the temperature detector 11 so that the outlet hot water temperature of the heater 3 becomes a predetermined temperature, and the hot water flowing out of the heater 3 is flowed through the flow path. Hot water is stored in the upper part of the hot water tank 1 through the switching means 5. Next, heat storage operation will be described. In this case, the flow path switching means 5 is in the flow direction from the heater 3 to the bath heater 4. The controller 12 controls the rotational speed of the circulation pump 2 with the second signal whose outlet hot water temperature of the heater 3 is lower than the first signal, passes through the flow path switching means 5 and flows into the bath heater 4. Then, the heat storage heat exchanger 8 is stored. And the water which flowed out from the heater 4 for baths flows into the heater 3 again, and is heated. That is, when the flow path direction of the flow path switching means is the hot water tank side, the flow path direction of the flow path switching means is the bath heater side so that the first temperature based on the first signal is obtained. The number of revolutions of the circulation pump is controlled so as to reach a second temperature based on a second signal lower than the first temperature. Therefore, it is possible to boil at a high temperature during hot water storage operation, and the hot water tank 1 can be downsized or the amount of stored hot water can be increased. Moreover, since heat can be stored at a predetermined temperature that can ensure the durability of the heat storage agent during the heat storage operation, the reliability is improved.
[0031]
Next, a fifth embodiment will be described. In FIG. 6, the same functions and operations as those of the first, second, third and fourth embodiments are denoted by the same reference numerals, and description thereof is omitted. A temperature detector 13 is provided in the middle of the circulation circuit to which the circulation pump 2, the heater 3, the flow path switching means 5, and the bath heater 5 are connected, and detects a temperature here to generate a signal. Reference numeral 14 denotes a controller that receives a signal from the temperature detector 13 and energizes the circulation pump 2 and performs control to switch the medium flow direction of the flow path switching means 5 to the bath heater 4 side.
[0032]
In the above configuration, when the operation is stopped in winter, the temperature detector 13 indicates that the water in the circulation circuit connected to the circulation pump 2, the heater 3, the flow path switching means 5, and the bath heater 4 has reached the freezing temperature. Will detect. The controller 14 receives the signal from the temperature detector 13, energizes the circulation pump 2, switches the flow path switching means 5 to the bath heater 4, and receives heat from the heat storage heat exchanger 8 while receiving heat from the heat storage heat exchanger 8. Circulate water. Therefore, it does not freeze when the operation is stopped in winter.
[0033]
Next, a sixth embodiment will be described. In FIG. 7, the same functions and operations as those of the first, second, third, fourth and fifth embodiments are denoted by the same reference numerals, and description thereof is omitted. A temperature detector 15 is provided downstream of the heater 3 and detects the temperature of water flowing therethrough to generate a signal. Reference numeral 16 denotes a controller which receives the signal from the temperature detector 15 after the operation is started and performs control to switch the medium flow direction of the flow path switching means 5 to the hot water tank 1 side.
[0034]
In the above configuration, the temperature of the hot water flowing out of the heater 3 gradually increases after the start of operation, and the temperature detector 15 detects that the temperature has reached a predetermined temperature. The controller 16 receives the signal from the temperature detector 15 and performs control to switch the flow path switching means 5 to the hot water tank 1 side. Then, hot water having a predetermined temperature heated by the heater 3 is stored in the hot water tank 1. Therefore, the medium temperature water that does not reach the hot water storage temperature at the start of operation flows into the heat storage heat exchanger 8 and stores heat. Moreover, since the hot water which reached the predetermined temperature flows into the upper part of the hot water storage tank 1, the remaining hot water temperature does not fall.
[0035]
Next, a seventh embodiment will be described. In FIG. 8, the same functions and operations as those of the first, second, third, fourth, fifth and sixth embodiments are denoted by the same reference numerals, and description thereof is omitted. A temperature detector 17 is provided downstream of the heater 3 and generates a plurality of signals, a first signal for detecting the temperature of water flowing therethrough and a second signal having a higher temperature than the first signal. Reference numeral 18 denotes a rotation speed controller which receives the first signal from the temperature detector 17 and controls the rotation speed of the circulation pump 2. Reference numeral 19 denotes a controller that receives the second signal from the temperature detector 17 and performs control to switch the medium flow direction of the flow path switching means 5 to the bath heater 4 side.
[0036]
In the above-described configuration, the supplied low-temperature water flowing out from the lower part of the hot water tank 1 is heated by the heater 3 during the hot water storage operation. The rotation speed controller 18 controls the rotation speed of the circulation pump 2 so that the outlet temperature of the heater 3 becomes the first signal of the temperature detector 17, and hot water of a predetermined temperature flows into the upper part of the hot water tank 1. The hot water is gradually stored from above. During this operation, the hot water flowing in from the upper part and the water supplied from the upper part in the hot water storage tank 1 form a mixed layer of hot water and water mixed with hot water and water. When the boiling operation is about to end, the mixed layer begins to flow out of the hot water tank 1 and flows into the heater 3. Therefore, the rotation speed controller 18 performs control to increase the rotation speed of the circulation pump 2 in order to keep the outlet temperature of the heater 3 constant, and the operation is continued up to the maximum rotation speed. When hot water starts to flow into the heater 3, the outlet temperature of the heater 3 begins to rise. This is detected by the second signal of the temperature detector 17, and a signal is sent to the controller 19. The controller 19 changes the channel direction of the channel switching means 5 to the bath heater 4 side. Accordingly, the hot water that has flowed out of the heater 3 passes through the flow path switching means 5, flows into the bath heater 4, and is stored in the heat storage heat exchanger 8. Therefore, hot water is stored in the hot water storage tank 1 to the lower part, and thereafter, the hot water storage operation is switched to the heat storage operation.
[0037]
【The invention's effect】
As is apparent from the above description, according to the hot water storage type hot water supply apparatus of the present invention, during hot water storage operation, the low-temperature water flowing from the lower part of the hot water storage tank is heated to a predetermined temperature by the heater and passes through the flow path switching means. Hot water is stored in the upper part of the hot water tank. Further, at the time of the heat insulation heating operation for wind, the water heated by the heater passes through the flow path switching means and flows into the bath heater, where the water for bath circulation is heated. And the water which flowed out from the heater for baths which temperature fell passes through a circulation pump, flows into a heater again, and is heated up. Therefore, even if the bath is kept warm and heated during the hot water, the hot water temperature does not change.
[0038]
And since the bath heat insulation heating operation is performed with a large capacity heater that boils the hot water storage tank, the reheating time is short, and furthermore, the hot water storage and bath heat insulation heating can be performed with a single heater, so the equipment is made compact. Cost reduction and saving work can be achieved.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a hot water storage type hot water supply apparatus in a first embodiment of the present invention. FIG. 2 is a configuration diagram showing flow path switching means of the apparatus. FIG. 3 is a hot water storage type in a second embodiment of the present invention. FIG. 4 is a block diagram of a hot water storage type hot water supply apparatus in the third embodiment of the present invention. FIG. 5 is a block diagram of a hot water storage type hot water supply apparatus in the fourth embodiment of the present invention. FIG. 7 is a block diagram of a hot water storage type hot water supply apparatus according to the fifth embodiment of the present invention. FIG. 8 is a block diagram of a hot water storage type hot water supply apparatus according to the sixth embodiment of the present invention. Fig. 9 is a block diagram of a conventional hot water storage type hot water supply device. Fig. 10 is a block diagram of another conventional hot water storage type hot water supply device.
DESCRIPTION OF SYMBOLS 1 Hot water tank 2 Circulation pump 3 Heater 4 Bath heater 5 Flow path switching means 5A 1st on-off valve 5B 2nd on-off valve 6 Bath circulation pump 7 Bathtub 8 Thermal storage heat exchanger 9, 11, 13, 15, 17 Temperature Detector 10, 12, 14, 16, 19 Controller 18 Speed controller

Claims

A hot water storage operation including a hot water storage tank, a heater, a bath heater, and a circulation pump, and hot water heated by the heater is stored in the hot water storage tank by the circulation pump, and is heated by the heater. A hot water storage type hot water supply apparatus capable of switching by a flow path switching means between a bath heat insulation heating operation for heating the water in the bathtub by allowing the hot water to flow into the bath heater by the circulation pump , A hot water storage type hot water supply device that controls the outlet hot water temperature so that it is lower during the bath insulation heating operation than during the hot water storage operation .

The hot water storage type hot water supply apparatus according to claim 1, wherein the number of rotations of the circulation pump is changed between the hot water storage operation and the bath heat insulation heating operation .

And temperature detector provided downstream of the heater, the rotation of the circulation pump so that the detected temperature of the temperature detector becomes a first temperature when the flow direction of the flow path switching means of the hot water storage tank side When the flow path direction of the flow path switching means is on the bath heater side , the circulation pump is controlled so that the temperature detected by the temperature detector is a second temperature lower than the first temperature . The hot water storage type hot water supply apparatus according to claim 1 or 2, further comprising a rotation speed controller for controlling the rotation speed .

A temperature detector provided in the middle of a circulation circuit connected to a circulation pump, a heater, a flow path switching means, and a bath heater; and when the temperature detector detects that the water in the circulation circuit has reached a freezing temperature. The hot water storage type hot water supply apparatus according to claim 1 or 2 , further comprising a controller that energizes the circulation pump and controls the flow path direction of the flow path switching means to the bath heater side.

A temperature detector provided downstream of the heater, a controller that receives a signal from the temperature detector after the start of operation and controls the flow direction of the flow path switching means to the hot water tank side, and a heater for the bath; The hot water storage type hot water supply apparatus according to claim 1 or 2, further comprising a heat storage heat exchanger having a heat exchange relationship .

Has a temperature detector provided downstream of the heater, at the close the hot water storage operation ends, the hot-water storage type hot water supply according to claim 1 or 2, wherein comprising a controller for switching control to the bath kept heating operation from the hot water storage operation apparatus.

The hot water storage type hot water supply apparatus according to any one of claims 1 to 4, further comprising a heat storage heat exchanger having a heat exchange relationship with a bath heater.

A temperature detector provided in the heat storage heat exchanger, and a controller for receiving a signal from the temperature detector and energizing the heater and connecting the flow path direction of the flow path switching means to the bath heater side. The hot water storage type hot water supply apparatus according to claim 5 or 7 .