JP3967883B2

JP3967883B2 - Freezing prevention device for bath circuit or heat absorption circuit

Info

Publication number: JP3967883B2
Application number: JP2001049724A
Authority: JP
Inventors: 信治安立; 祐一川村; 成樹村山
Original assignee: Corona Corp
Current assignee: Corona Corp
Priority date: 2001-02-26
Filing date: 2001-02-26
Publication date: 2007-08-29
Anticipated expiration: 2021-02-26
Also published as: JP2002250558A

Description

【０００１】
【発明の属する技術分野】
この発明は、風呂を沸かす為の風呂回路又は、吸熱部に温水を循環せることで高温水を得て、これを貯湯部に貯湯し必要に応じて給湯する太陽熱給湯装置、燃料電池給湯機等の吸熱回路の凍結防止装置に関するものである。
【０００２】
【従来の技術】
従来よりこの種の風呂回路及び吸熱回路に於いては、外気温が凍結防止温度以下に低下した事を凍結防止センサが検知して、回路の循環ポンプを駆動させ、温水を循環させることで、回路の凍結を防止するものであった。
【０００３】
【発明が解決しようとする課題】
ところでこの従来のものでは、循環ポンプの凍結防止運転は外気温が凍結防止温度以上に上昇するまで継続され、電力消費量が多くなり不経済であると共に、主に駆動は真夜中となり騒音の原因になると言う問題点を有し、又外気温を検知してのみの運転で、実際の温水温度を検知していない為、本来は凍結の心配がない温水温度でも循環ポンプを凍結防止運転させている可能性も有り、的確で経済的な凍結防止運転が出来ないと言う不具合も有するものであった。
【０００４】
【課題を解決するための手段】
この発明はこの点に着目し上記課題を解決するため、請求項１では特にその構成を、内部を通る温水が加熱される熱源部と、加熱された温水を貯湯する浴槽と、熱源部と浴槽とを連通する風呂往き管と風呂戻り管から成り風呂循環ポンプを有して温水を循環させる風呂回路と、前記熱源部側に設けた外気温或いは外気温に近い温度を検知する凍結防止センサと、風呂回路の循環温水の温度を検知する温水温度センサと、前記凍結防止センサが所定温度以下を検知した時、風呂循環ポンプを所定時間駆動し、凍結防止センサが所定温度を超える温度を検知するまで風呂循環ポンプを再度所定時間駆動する凍結防止運転を行う凍結制御手段とを備えたものに於いて、前記凍結制御手段は、凍結防止センサが所定温度以下を検知して風呂循環ポンプを所定時間駆動した後、温水温度センサが検知する風呂回路の循環温水の温度が所定温度以上の時は、風呂循環ポンプの駆動時間と停止時間を設定して、風呂循環ポンプを設定した駆動時間駆動し、その後設定した停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻るものである。
又本発明の請求項２に係る風呂回路の凍結防止装置では、特にその構成を、内部を通る温水が加熱される熱源部と、加熱された温水を貯湯する浴槽と、熱源部と浴槽とを連通する風呂往き管と風呂戻り管から成り風呂循環ポンプを有して温水を循環させる風呂回路と、前記熱源部側に設けた外気温或いは外気温に近い温度を検知する凍結防止センサと、風呂回路の循環温水の温度を検知する温水温度センサと、前記凍結防止センサが所定温度以下を検知した時、風呂循環ポンプを所定時間駆動し、凍結防止センサが所定温度を超える温度を検知するまで風呂循環ポンプを再度所定時間駆動する凍結防止運転を行う凍結制御手段とを備えたものに於いて、前記凍結制御手段は、凍結防止センサが所定温度以下を検知して風呂循環ポンプを所定時間駆動した後、温水温度センサが検知する風呂回路の循環温水の温度が所定温度以上の時は、その循環温水の温度に応じて駆動時間を決定して風呂循環ポンプを駆動し、その後所定時間である停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻るものである。
又本発明の請求項３に係る風呂回路の凍結防止装置では、特にその構成を、内部を通る温水が加熱される熱源部と、加熱された温水を貯湯する浴槽と、熱源部と浴槽とを連通する風呂往き管と風呂戻り管から成り風呂循環ポンプを有して温水を循環させる風呂回路と、前記熱源部側に設けた外気温或いは外気温に近い温度を検知する凍結防止センサと、風呂回路の循環温水の温度を検知する温水温度センサと、前記凍結防止センサが所定温度以下を検知した時、風呂循環ポンプを所定時間駆動し、凍結防止センサが所定温度を超える温度を検知するまで風呂循環ポンプを再度所定時間駆動する凍結防止運転を行う凍結制御手段とを備えたものに於いて、前記凍結制御手段は、凍結防止センサが所定温度以下を検知して風呂循環ポンプを所定時間駆動した後、温水温度センサが検知する風呂回路の循環温水の温度が所定温度以上の時は、その循環温水の温度に応じて風呂循環ポンプの駆動時間と停止時間を設定して、風呂循環ポンプを設定した駆動時間駆動し、その後設定した停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻るものである。
【０００５】
又本発明の請求項４に係る吸熱回路の凍結防止装置では、特にその構成を、内部を通る温水が加熱される吸熱部と、加熱された温水を貯湯し必要箇所へ給湯する貯湯部と、吸熱部と貯湯部とを連通する吸熱往き管と吸熱戻り管から成り吸熱循環ポンプを有して温水を循環させる吸熱回路と、前記吸熱部側には外気温或いは外気温に近い温度を検知する凍結防止センサと、吸熱回路に設けられ循環温水の温度を検知する温水温度センサと、前記凍結防止センサが所定温度以下を検知した時、吸熱循環ポンプを所定時間駆動し、凍結防止センサが所定温度を超える温度を検知するまで吸熱循環ポンプを再度所定時間駆動する凍結防止運転を行う凍結制御手段とを備えたものに於いて、前記凍結制御手段は、凍結防止センサが所定温度以下を検知して吸熱循環ポンプを所定時間駆動した後、温水温度センサが検知する吸熱回路の循環温水の温度が所定温度以上の時は、吸熱循環ポンプの駆動時間と停止時間を設定して、吸熱循環ポンプを設定した駆動時間駆動し、その後設定した停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻るものである。
又本発明の請求項５に係る吸熱回路の凍結防止装置では、特にその構成を、内部を通る温水が加熱される吸熱部と、加熱された温水を貯湯し必要箇所へ給湯する貯湯部と、吸熱部と貯湯部とを連通する吸熱往き管と吸熱戻り管から成り吸熱循環ポンプを有して温水を循環させる吸熱回路と、前記吸熱部側には外気温或いは外気温に近い温度を検知する凍結防止センサと、吸熱回路に設けられ循環温水の温度を検知する温水温度センサと、前記凍結防止センサが所定温度以下を検知した時、吸熱循環ポンプを所定時間駆動し、凍結防止センサが所定温度を超える温度を検知するまで吸熱循環ポンプを再度所定時間駆動する凍結防止運転を行う凍結制御手段とを備えたものに於いて、前記凍結防止運転時は、貯湯部上部の高温水を吸熱回路に循環させ、低温となった温水を貯湯部下部に戻すように吸熱回路を切替ると共に、前記凍結制御手段は、凍結防止センサが所定温度以下を検知して吸熱循環ポンプを所定時間駆動した後、温水温度センサが検知する吸熱回路の循環温水の温度が所定温度以上の時は、吸熱循環ポンプの駆動時間と停止時間を設定して、吸熱循環ポンプを設定した駆動時間駆動し、その後設定した停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻るものである。
【０００６】
又本発明の請求項６に係る吸熱回路の凍結防止装置では、特にその構成を、内部を通る温水が加熱される吸熱部と、加熱された温水を貯湯し必要箇所へ給湯する貯湯部と、吸熱部と貯湯部とを連通する吸熱往き管と吸熱戻り管から成り吸熱循環ポンプを有して温水を循環させる吸熱回路と、前記吸熱部側には外気温或いは外気温に近い温度を検知する凍結防止センサと、吸熱回路に設けられ循環温水の温度を検知する温水温度センサと、前記凍結防止センサが所定温度以下を検知した時、吸熱循環ポンプを所定時間駆動し、凍結防止センサが所定温度を超える温度を検知するまで吸熱循環ポンプを再度所定時間駆動する凍結防止運転を行う凍結制御手段とを備えたものに於いて、前記凍結制御手段は、凍結防止センサが所定温度以下を検知して吸熱循環ポンプを所定時間駆動した後、温水温度センサが検知する吸熱回路の循環温水の温度が所定温度以上の時は、その循環温水の温度に応じて駆動時間を決定して吸熱循環ポンプを駆動し、その後所定時間である停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻るものである。
又本発明の請求項７に係る吸熱回路の凍結防止装置では、特にその構成を、内部を通る温水が加熱される吸熱部と、加熱された温水を貯湯し必要箇所へ給湯する貯湯部と、吸熱部と貯湯部とを連通する吸熱往き管と吸熱戻り管から成り吸熱循環ポンプを有して温水を循環させる吸熱回路と、前記吸熱部側には外気温或いは外気温に近い温度を検知する凍結防止センサと、吸熱回路に設けられ循環温水の温度を検知する温水温度センサと、前記凍結防止センサが所定温度以下を検知した時、吸熱循環ポンプを所定時間駆動し、凍結防止センサが所定温度を超える温度を検知するまで吸熱循環ポンプを再度所定時間駆動する凍結防止運転を行う凍結制御手段とを備えたものに於いて、前記凍結防止運転時は、貯湯部上部の高温水を吸熱回路に循環させ、低温となった温水を貯湯部下部に戻すように吸熱回路を切替ると共に、前記凍結制御手段は、凍結防止センサが所定温度以下を検知して吸熱循環ポンプを所定時間駆動した後、温水温度センサが検知する吸熱回路の循環温水の温度が所定温度以上の時は、その循環温水の温度に応じて駆動時間を決定して吸熱循環ポンプを駆動し、その後所定時間である停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻るものである。
【０００７】
又本発明の請求項８に係る吸熱回路の凍結防止装置では、特にその構成を、内部を通る温水が加熱される吸熱部と、加熱された温水を貯湯し必要箇所へ給湯する貯湯部と、吸熱部と貯湯部とを連通する吸熱往き管と吸熱戻り管から成り吸熱循環ポンプを有して温水を循環させる吸熱回路と、前記吸熱部側には外気温或いは外気温に近い温度を検知する凍結防止センサと、吸熱回路に設けられ循環温水の温度を検知する温水温度センサと、前記凍結防止センサが所定温度以下を検知した時、吸熱循環ポンプを所定時間駆動し、凍結防止センサが所定温度を超える温度を検知するまで吸熱循環ポンプを再度所定時間駆動する凍結防止運転を行う凍結制御手段とを備えたものに於いて、前記凍結制御手段は、凍結防止センサが所定温度以下を検知して吸熱循環ポンプを所定時間駆動した後、温水温度センサが検知する吸熱回路の循環温水の温度が所定温度以上の時は、その循環温水の温度に応じて吸熱循環ポンプの駆動時間と停止時間を設定して、吸熱循環ポンプを設定した駆動時間駆動し、その後設定した停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻るものである。
又本発明の請求項９に係る吸熱回路の凍結防止装置では、特にその構成を、内部を通る温水が加熱される吸熱部と、加熱された温水を貯湯し必要箇所へ給湯する貯湯部と、吸熱部と貯湯部とを連通する吸熱往き管と吸熱戻り管から成り吸熱循環ポンプを有して温水を循環させる吸熱回路と、前記吸熱部側には外気温或いは外気温に近い温度を検知する凍結防止センサと、吸熱回路に設けられ循環温水の温度を検知する温水温度センサと、前記凍結防止センサが所定温度以下を検知した時、吸熱循環ポンプを所定時間駆動し、凍結防止センサが所定温度を超える温度を検知するまで吸熱循環ポンプを再度所定時間駆動する凍結防止運転を行う凍結制御手段とを備えたものに於いて、前記凍結防止運転時は、貯湯部上部の高温水を吸熱回路に循環させ、低温となった温水を貯湯部下部に戻すように吸熱回路を切替ると共に、前記凍結制御手段は、凍結防止センサが所定温度以下を検知して吸熱循環ポンプを所定時間駆動した後、温水温度センサが検知する吸熱回路の循環温水の温度が所定温度以上の時は、その循環温水の温度に応じて吸熱循環ポンプの駆動時間と停止時間を設定して、吸熱循環ポンプを設定した駆動時間駆動し、その後設定した停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻るものである。
【０００８】
【発明の実施の形態】
次にこの発明に係る風呂回路の凍結防止装置を図１、図２に示す１缶３回路式給湯装置の一実施形態で説明する。
【０００９】
１は下部に加熱用のバーナ部２を備える燃焼室３を形成した暖房用缶体で、この缶体１内方には蛇管による間接加熱式の給湯用の熱交換器を構成する給湯用熱交４と、蛇管による間接加熱式の風呂焚き用の熱交換器を構成する風呂用熱交５とを上下に配設し、温水暖房を行うと共に給湯及び風呂焚きを同時またはそれぞれ単独でも行えるようにしたものであり、この風呂用熱交５が熱源部を構成するものである。
【００１０】
まず、暖房回路Ａについて説明すると、６は暖房往き管、７は例えば床暖房パネル等の暖房用放熱器、８は暖房戻り管、９は暖房用循環ポンプ、１０は気液分離器、１１は暖房用膨張タンク、１２は開閉弁１３が設けられた暖房バイパス管、１４は暖房用缶体１の温度制御に用いる缶体温度センサで、暖房用缶体１にてバーナ部２の燃焼で缶体温度センサ１４の制御目標温度（約６０℃〜８５℃程度）まで加熱された熱媒体が、暖房用循環ポンプ９により暖房往き管６を介して暖房用放熱器７に送られて暖房を行い、暖房用放熱器７で放熱した低温水（約３０℃〜５０℃程度）が暖房戻り管８を介して暖房用缶体１に戻り再度制御目標温度まで加熱されて循環するものである。
【００１１】
次に給湯回路Ｂについて説明すると、１５は水道に接続された給水管、１６は水の流量を検知する流量センサ、１７は給湯用熱交４で加熱された温水を出湯する給湯管、１８は給湯栓、１９はミキシング弁２０を介して給湯管１７に接続され給水管１５と給湯管１７とを連通する給湯バイパス管、２１は給湯栓１８の閉止時の熱膨張を吸収する給湯用膨張タンク、２２は給水温度センサ、２３は給湯温度センサで、給湯栓１８が開かれて流量センサ１６が最低作動流量を検知すると、暖房用缶体１内の熱媒体の温度を約８０℃程度の高温に維持するようバーナ部２で燃焼を行い、給水管１５からの冷水が給湯用熱交４で暖房用缶体１内の高温の熱媒体により間接加熱され、ミキシング弁２０で水道水と混合され適温に調節されて給湯栓１８から給湯されるものである。
【００１２】
次に風呂回路Ｃについて説明すると、２４は浴槽、２５は風呂往き管、２６は風呂戻り管、２７は戻り管２６に設けられた風呂循環ポンプ、２８は循環の有無を検知する流水スイッチ、２９は風呂温度センサで、浴槽２４内の湯の沸かし上げ要求があると、浴槽２４内の湯を風呂循環ポンプ２７で風呂用熱交５に循環させ、浴槽２４内の湯が暖房用缶体１内の高温の熱媒体により間接加熱されることで浴槽２４内の湯を適温まで沸かし上げたり保温したりするものであり、前記風呂温度センサ２９が温水温度センサを兼用するものである。
【００１３】
３０は凍結防止センサで、上記各部を収納し屋外に設置される枠体３１内に備えられ、この枠体３１内の温度が凍結防止温度の５℃以下に低下することで、この温度を凍結防止センサ３０が検知して風呂循環ポンプ２７を先ず１分間だけ駆動し、この時の温水温度を温水温度センサを兼ねる風呂温度センサ２９で検知し、この時の温水温度に応じてマイコンから成る凍結制御手段３２が、以後の風呂循環ポンプ２７のＯＮ／ＯＦＦ比を決定し、これに従って凍結防止制御するものである。
ここでは、温水温度１５℃以上で３０分ＯＦＦし１分ＯＮの制御を行い、温水温度１℃〜４℃では３０分ＯＦＦし４分ＯＮの制御を行い、又０℃以下ではＯＦＦを継続してＯＮさせない制御を行うものである。
【００１４】
そして、３３は給湯回路Ｂの給湯管１７から分岐されて風呂回路Ｃに湯張り弁３４及び三方弁３５を介して接続される湯張り管で、風呂の湯張り要求があると三方弁３５を風呂回路Ｃと湯張り管３３とを連通するよう切り換えると共に湯張り弁３４を開弁し、給湯用熱交４で加熱された湯を風呂回路Ｃ内に流入させて浴槽２４への一定量の湯張りを行うものである。
【００１５】
ここで、３６は暖房用缶体１の上下部を結ぶ連通パイプ、３７はこの連通パイプ３６途中に備えられた撹拌用循環ポンプで、給湯時または風呂運転時に駆動して、暖房用缶体１内の温度を上下均一化させるもので、給湯または風呂運転が終了するまで継続駆動して撹拌を行うものである。尚、暖房運転時は暖房用循環ポンプ９が駆動されているため、撹拌用循環ポンプ３７は駆動しないようにすることも可能である。
【００１６】
次にこの一実施形態の作動について説明する。
先ず、暖房運転を説明すれば、缶体温度センサ１４が暖房用缶体１内の湯温を検知し、この温度が高温暖房負荷の場合は約８０℃、低温暖房負荷の場合は約６０℃になるようにバーナ部２の燃焼を制御すると共に、暖房用循環ポンプ９を駆動して暖房用缶体１内の高温となった温水や循環液や不凍液等の熱媒体を暖房用放熱器７に流通し、再び暖房用缶体１に戻す循環を繰り返して、暖房用放熱器７によって室内の暖房を行うものである。
【００１７】
次に給湯運転は、暖房運転が行われている場合には既に暖房用缶体１内が高温となっているので、給湯栓１８が開かれれば給水管１５からの低温の水は直ぐに給湯用熱交４で暖房用缶体１内の高温の熱媒体により間接加熱されると同時に、撹拌用循環ポンプ３７を駆動し連通パイプ３６を介して缶体１の下部にある湯を缶体１上部に供給して暖房用缶体１の撹拌を行い暖房用缶体１内の上と下の温度差をなくし、常に同一の熱交換効率で熱交換できるようにして所望の温度の湯が供給されるものである。
【００１８】
この時、暖房に供されて温度低下した熱媒体が暖房用缶体１に流入するが、この戻りの熱媒体は約３０℃〜６０℃程度で比較的高い温度で、従来の給湯用の缶体の場合の低温の水道水よりも十分に高い温度であるため、缶体１内の温度が急激に低下するようなことがなく、暖房を行いながら給湯用の必要熱量を確実に確保して安定した温度の給湯を行うことができると共に、給湯用の熱交換を暖房用缶体１内の給湯用熱交４で行うことにより水道圧をそのまま利用する直圧式の給湯を行えるものである。
【００１９】
尚、暖房運転時には暖房用循環ポンプ９が駆動されているため、暖房用缶体１内の上下の温度差はある程度解消されるため、撹拌用循環ポンプ３７を駆動させないようにすることが可能であるが、撹拌用循環ポンプ３７を駆動すれば更に温度差が解消される効果がある。また、暖房と給湯の同時運転の際には、暖房用缶体１の制御目標温度を暖房単独運転時よりも高温にして給湯用熱交４での熱交換効率を向上させることも可能である。
【００２０】
ここで、給湯運転前に暖房運転が行われていない場合について説明すると、ユーザーが図示しないリモコン等の給湯運転スイッチを入れると、バーナ部２で燃焼を開始して缶体温度センサ１４で検知する暖房用缶体１の温度を約８５℃の制御目標温度まで加熱し、撹拌用循環ポンプ３７を駆動し連通パイプ３６を介して缶体１の下部にある湯を缶体１上部に供給して暖房用缶体１の撹拌を行い暖房用缶体１内の上と下の温度差をなくし常に同一の熱交換効率で熱交換できるようにし、給湯栓１８が開かれるまで待機する。
【００２１】
そして、給湯栓１８が開かれれば、給湯用熱交４内を通過した市水道からの冷水は高温に維持された暖房用缶体１内の熱媒体によって間接加熱されて所望の温度の湯が供給されるものである。尚、夏期などの暖房運転の不必要な期間には給湯終了から一定時間（例えば４時間）の間に再度給湯されることがない場合は、自動的に給湯運転スイッチをオフして、暖房用缶体１の制御目標温度での保持状態を解除して省エネを計ることも可能である。
【００２２】
次に風呂運転は、図示しないリモコンの風呂保温スイッチをＯＮした等の浴槽２４内の湯の沸かし上げ要求があると、風呂用循環ポンプ２７を駆動して浴槽２４内の湯を風呂用熱交５に循環させて、高温に保持された暖房用缶体１内の熱媒体で加熱して浴槽２４内の湯を所望の温度に追い焚きしたり保温したりするもので、風呂温度センサ２９が所望の温度を検知すると自動的に停止されるものである。
【００２３】
尚、このとき給湯運転時と同様に暖房用缶体１には比較的高い温度の熱媒体が戻ってくるため、缶体１内の温度が急激に低下するようなことがなく、暖房を行いながら風呂用の必要熱量を確実に確保して安定した風呂の追い焚きまたは保温を行うことができると共に、撹拌用循環ポンプ３７で暖房用缶体１内の上と下の温度差をなくし常に同一の熱交換効率で沸き上がり時間が大きく変動しない風呂焚きを実現できるものである。
【００２４】
また、給湯と風呂の同時運転の場合には給湯単独運転の場合と同様に暖房用循環ポンプ９を駆動しないで暖房用缶体１を温度制御して上記の給湯運転と風呂運転を同時に行えば良く、給湯と風呂と暖房の同時運転の場合には、給湯・暖房同時運転時または風呂・暖房同時運転時と同様に給湯温度と風呂温度をそれぞれ同時に制御することが可能である。
【００２５】
次に風呂回路Ｃでの凍結防止運転を図２に示すフローチャートに従って説明すれば、外気温が下がり枠体３１内が凍結防止温度の５℃以下に低下すると、この温度を凍結防止センサ３０が検知し（ステップ３８）、ＹＥＳでステップ３９に進み風呂循環ポンプ２７を先ず１分間駆動する。
【００２６】
そしてステップ４０で風呂温度センサ２９で今の温水温度を検知して、１５℃以上であればＹＥＳでステップ４１に進み、凍結制御手段３２による風呂循環ポンプ２７を１分間ＯＮし、３０分間ＯＦＦする制御を行い再びステップ３８に戻り、凍結防止センサ３０が５℃以上を検知するまでこれを繰り返す。
【００２７】
また、ステップ４０で温水温度が１４℃以下の場合には、ＯＮでステップ４２に進み温水温度が１℃〜１４℃かを判断し、ＹＥＳでステップ４３に進んで凍結制御手段３２による風呂循環ポンプ２７を４分間ＯＮし、３０分間ＯＦＦする制御を行い再びステップ３８に戻りこれを繰り返す。
【００２８】
更にステップ４２で温水温度が１℃より低い場合には、ＯＮでステップ４４に進み温水温度が０℃以下かを判断し、ＹＥＳでステップ４５に進んで凍結制御手段３２による風呂循環ポンプ２７のＯＦＦを継続する制御を行い再びステップ３８に戻りこれを繰り返すが、ステップ４４でＯＮの場合にはステップ４０に戻るものである。
【００２９】
従って、風呂回路Ｃが凍結する恐れがある時には、確実に風呂循環ポンプ２７を駆動して配管及び風呂循環ポンプ２７自身の凍結を防止出来るものであり、しかもその駆動は温水温度を検知してから行われるので、的確で無駄が無く、消費電力を極力抑える事が出来ると共に、駆動時の騒音も最小限にする事ができるものである。
【００３０】
次に吸熱回路の凍結防止装置を図３、図４に示す太陽熱給湯装置を例に説明する。
４６は家の屋根上等に設置されるコレクターから成る吸熱部で、内方を流通する温水を太陽熱を受けて加熱する。
【００３１】
４７は吸熱循環ポンプ４８を有した吸熱往き管４９及び吸熱戻り管５０から成る吸熱回路５１を介して吸熱部４６と連通した貯湯部で、吸熱循環ポンプ４８の駆動で貯湯部４７の下部に連通した吸熱往き管４９により低温水を吸熱部４６に供給し、加熱された高温水を貯湯部４７の上部に連通した吸熱戻り管５０で戻し、順次この循環を繰り返して高温水を貯湯するものである。
【００３２】
５２は貯湯部４７の頂部と給湯栓５３とを連通する給湯管で、必要に応じて給湯栓５３を開くことで、貯湯部４７の高温水を給湯することが出来、そしてこの給湯で減った分の給水が給水管５４を介して貯湯部４７に供給される。
【００３３】
５５は吸熱部４６内に備えられた吸熱温度センサで、該吸熱部４６内の温度を検知し所定の高温度を検知することで、吸熱回路５１の吸熱循環ポンプ４８を駆動させて吸熱を開始させるものであり、またこの吸熱温度センサ５５は吸熱部４６の凍結防止温度の５℃以下も検知し、吸熱循環ポンプ４８を１分間駆動させる凍結防止センサも兼ねているものである。
【００３４】
５６は吸熱回路５１中に備えられた温水温度センサで、凍結防止温度以下での吸熱循環ポンプ４８の駆動時に、この時の温水温度を検知し、この検知温度に応じて貯湯部４７に備えられたマイコンから成る凍結制御手段５７が、以後の吸熱循環ポンプ２７のＯＮ／ＯＦＦ比を決定し、これに従って凍結防止制御するものである。
ここでは、温水温度１５℃以上で３０分ＯＦＦし１分ＯＮの制御を行い、温水温度１℃〜４℃では３０分ＯＦＦし４分ＯＮの制御を行い、又０℃以下ではＯＦＦを継続してＯＮさせない制御を行うものである。
【００３５】
５８は吸熱回路５１途中で吸熱循環ポンプ４８と貯湯部４７との間に備えられた回路切替手段で、凍結制御手段５７からの信号で吸熱往き管４９に備えた第１三方弁５９と、吸熱戻り管５０に備えた第２三方弁６０を切替て、凍結防止運転時は貯湯部４７上部の高温水を循環させ、温度低下した温水を貯湯部４７の下部に戻すようにするものである。
【００３６】
次にこの吸熱回路の作動を説明する。
吸熱部４６に太陽光が当たり温度上昇して所定の高温度になると吸熱温度センサ５５がこれを検知し、吸熱循環ポンプ４８を駆動させることで、貯湯部４７下部の低温水を吸熱往き管４９を介して吸熱部４６を通し、熱交換させて高温水とした後、吸熱戻り管５０を介して貯湯部４７の上部に戻す循環を順次繰り返すことで、貯湯部４７を高温水で満たすもので、この貯湯部４７が所定温度になることで吸熱循環ポンプ４８は、自動的に停止されるものである。
【００３７】
そしてこの状態で給湯栓５３を開くことで、貯湯部４７内に貯湯された高温水が給湯され、適宜利用されるものであり、この給湯で高温水が減少すると貯湯部４７へは給水が補給されるものである。
【００３８】
次にこの吸熱回路の凍結防止制御を図４に示すフローチャートに従って説明すれば、外気温が下がり吸熱部４６内が凍結防止温度の５℃以下に低下すると、この温度を吸熱温度センサ５５が検知し（ステップ６１）、ＹＥＳでステップ６２に進み吸熱循環ポンプ４８を先ず１分間駆動すると共に、回路切替手段５８が回路の切替を行う。
【００３９】
そしてステップ６３で温水温度センサ５６で今の温水温度を検知して、１５℃以上であればＹＥＳでステップ６４に進み、凍結制御手段５７による吸熱循環ポンプ４８を１分間ＯＮし、３０分間ＯＦＦする制御を行い再びステップ６に戻り、吸熱温度センサ５５が５℃以上を検知するまでこれを繰り返す。
【００４０】
また、ステップ６３で温水温度が１４℃以下の場合には、ＯＮでステップ６５に進み温水温度が１℃〜１４℃かを判断し、ＹＥＳでステップ６６に進んで凍結制御手段５７による吸熱循環ポンプ４８を４分間ＯＮし、３０分間ＯＦＦする制御を行い再びステップ６１に戻りこれを繰り返す。
【００４１】
更にステップ６５で温水温度が１℃より低い場合には、ＯＮでステップ６７に進み温水温度が０℃以下かを判断し、ＹＥＳでステップ６８に進んで凍結制御手段５７による吸熱循環ポンプ４８のＯＦＦを継続する制御を行い再びステップ６１に戻りこれを繰り返すが、ステップ６７でＯＮの場合にはステップ６３に戻るものである。
【００４２】
従って、吸熱回路５１が凍結する恐れがある時には、確実に吸熱循環ポンプ４８を駆動して配管及び吸熱循環ポンプ４８自身の凍結を防止出来るものであり、しかもその駆動は実際の温水温度を検知し、この温度に応じて駆動時間を変えているので、的確で無駄が無く、消費電力を極力抑える事が出来ると共に、駆動時の騒音も最小限にする事ができるものである。
【００４３】
また、凍結防止運転時には、回路切替手段５８によって吸熱回路５１も切替られ、高温水の循環で確実に凍結が防止されると共に、循環後の低温水は貯湯部４７の下部に戻されるので、貯湯水の温度を急激に低下させることがなく、貯湯水側からも効率の良い凍結防止が行えるものである。
【００４４】
尚、この実施例では循環ポンプのＯＮ時間を可変しＯＦＦ時間は一定としているが、これに限定されることなく、例えばこの逆でＯＦＦ時間を可変するようにしても良いものであり、ＯＮ時間を断続的にしたり多々考えられるものである。更に吸熱回路を太陽熱給湯装置で説明したが、これに限らず近年話題となっている燃料電池用給湯器や電気給湯機でも同様な効果を得られるものである。
【００４５】
【発明の効果】
以上のように、請求項１の風呂回路の凍結防止装置によれば、外気温或いは外気温に近い温度を検知する凍結防止センサが所定温度以下を検知することで、風呂循環ポンプを先ず所定時間駆動した後、風呂回路の循環温水の温度を温水温度センサで検知して、その温度が所定温度以上の時は、風呂循環ポンプの駆動時間と停止時間を設定して、風呂循環ポンプを設定した駆動時間駆動し、その後設定した停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻るので、風呂回路が凍結する恐れがある時には、確実に風呂循環ポンプを駆動して配管及び風呂循環ポンプ自身の凍結を防止出来るものであり、しかもその駆動は温水温度を検知してから行われるので、的確で無駄が無く、消費電力を極力抑える事が出来ると共に、駆動時の騒音も最小限にする事ができるものである。
又前記構成による請求項２記載の風呂回路の凍結防止装置によれば、外気温或いは外気温に近い温度を検知する凍結防止センサが所定温度以下を検知することで、風呂循環ポンプを先ず所定時間駆動した後、風呂回路の循環温水の温度を温水温度センサで検知して、その温度が所定温度以上の時は、その循環温水の温度に応じて駆動時間を決定して風呂循環ポンプを駆動し、その後所定時間である停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻るので、風呂回路が凍結する恐れがある時には、確実に風呂循環ポンプを駆動して配管及び風呂循環ポンプ自身の凍結を防止出来るものであり、しかもその駆動は温水温度を検知してから行われるので、的確で無駄が無く、消費電力を極力抑える事が出来ると共に、駆動時の騒音も最小限にする事ができるものである。
更に循環温水の温度に応じて駆動時間を決定して風呂循環ポンプを駆動するので、循環温水の温水温度を検知して、この温度に応じて風呂循環ポンプの駆動時間を決定するので、的確で経済的な凍結防止運転が行え、消費電力を極力抑える事が出来ると共に、静音化も計れるものである。
又前記構成による請求項３記載の風呂回路の凍結防止装置によれば外気温或いは外気温に近い温度を検知する凍結防止センサが所定温度以下を検知することで、風呂循環ポンプを先ず所定時間駆動した後、風呂回路の循環温水の温度を温水温度センサで検知して、その温度が所定温度以上の時は、その循環温水の温度に応じて駆動時間と停止時間とを設定し、風呂循環ポンプを設定した駆動時間駆動し、その後設定した停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻るので、風呂回路が凍結する恐れがある時には、確実に風呂循環ポンプを駆動して配管及び風呂循環ポンプ自身の凍結を防止出来るものであり、しかもその駆動は温水温度を検知してから行われるので、的確で無駄が無く、消費電力を極力抑える事が出来ると共に、駆動時の騒音も最小限にする事ができるものである。
更に循環温水の温度に応じて駆動時間と停止時間とを決定して風呂循環ポンプを駆動するので、循環温水の温水温度を検知して、この温度に応じて風呂循環ポンプの駆動時間と停止時間とを決定するので、的確で経済的な凍結防止運転が行え、消費電力を極力抑える事が出来ると共に、静音化も計れるものである。
【００４６】
又前記構成による請求項４記載の吸熱回路の凍結防止装置によれば、外気温或いは外気温に近い温度を検知する凍結防止センサが所定温度以下を検知することで吸熱循環ポンプを先ず所定時間駆動した後、吸熱回路の循環温水の温度を温水温度センサで検知して、その温度が所定温度以上の時は、吸熱循環ポンプの駆動時間と停止時間を設定して、吸熱循環ポンプを設定した駆動時間駆動し、その後設定した停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻るので、吸熱回路が凍結する恐れがある時には、確実に吸熱循環ポンプを駆動して配管及び吸熱循環ポンプ自身の凍結を防止出来るものであり、しかもその駆動は温水温度を検知してから行われるので、的確で無駄が無く、消費電力を極力抑える事が出来ると共に、駆動時の騒音も最小限にする事ができるものである。
又前記構成による請求項５記載の吸熱回路の凍結防止装置によれば、外気温或いは外気温に近い温度を検知する凍結防止センサが所定温度以下を検知することで吸熱循環ポンプを先ず所定時間駆動した後、吸熱回路の循環温水の温度を温水温度センサで検知して、その温度が所定温度以上の時は、吸熱循環ポンプの駆動時間と停止時間を設定して、吸熱循環ポンプを設定した駆動時間駆動し、その後設定した停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻り、前記凍結防止運転時は、貯湯部上部の高温水を吸熱回路に循環させ、低温となった温水を貯湯部下部に戻すように吸熱回路を切替るので、吸熱回路が凍結する恐れがある時には、確実に吸熱循環ポンプを駆動して配管及び吸熱循環ポンプ自身の凍結を防止出来るものであり、しかもその駆動は温水温度を検知してから行われるので、的確で無駄が無く、消費電力を極力抑える事が出来ると共に、駆動時の騒音も最小限にする事ができるものである。
又、吸熱回路での凍結防止運転時に回路を切替えて、高温水を循環させて凍結を確実に防止すると共に、低温水を貯湯部の下部に戻すことで温度低下を防止して、効率良く且つ経済的な凍結防止が行えるものである。
又前記構成による請求項６記載の吸熱回路の凍結防止装置によれば、外気温或いは外気温に近い温度を検知する凍結防止センサが所定温度以下を検知することで、吸熱循環ポンプを先ず所定時間駆動した後、吸熱回路の循環温水の温度を温水温度センサで検知して、その温度が所定温度以上の時は、その循環温水の温度に応じて駆動時間を決定して吸熱循環ポンプを駆動し、その後所定時間である停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻るので、吸熱回路が凍結する恐れがある時には、確実に吸熱循環ポンプを駆動して配管及び吸熱循環ポンプ自身の凍結を防止出来るものであり、しかもその駆動は温水温度を検知してから行われるので、的確で無駄が無く、消費電力を極力抑える事が出来ると共に、駆動時の騒音も最小限にする事ができるものである。
更に循環温水の温度に応じて駆動時間を決定して吸熱循環ポンプを駆動するので、循環温水の温水温度を検知して、この温度に応じて吸熱循環ポンプの駆動時間を決定するので、的確で経済的な凍結防止運転が行え、消費電力を極力抑える事が出来ると共に、静音化も計れるものである。
又前記構成による請求項７記載の吸熱回路の凍結防止装置によれば、外気温或いは外気温に近い温度を検知する凍結防止センサが所定温度以下を検知することで吸熱循環ポンプを先ず所定時間駆動した後、吸熱回路の循環温水の温度を温水温度センサで検知して、その温度が所定温度以上の時は、その循環温水の温度に応じて駆動時間を設定して吸熱循環ポンプを設定した駆動時間駆動し、その後所定時間である停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻り、前記凍結防止運転時は、貯湯部上部の高温水を吸熱回路に循環させ、低温となった温水を貯湯部下部に戻すように吸熱回路を切替るので、吸熱回路が凍結する恐れがある時には、確実に吸熱循環ポンプを駆動して配管及び吸熱循環ポンプ自身の凍結を防止出来るものであり、しかもその駆動は温水温度を検知してから行われるので、的確で無駄が無く、消費電力を極力抑える事が出来ると共に、駆動時の騒音も最小限にする事ができるものである。
更に循環温水の温度に応じて駆動時間を決定して吸熱循環ポンプを駆動するので、循環温水の温水温度を検知して、この温度に応じて吸熱循環ポンプの駆動時間を決定するので、的確で経済的な凍結防止運転が行え、消費電力を極力抑える事が出来ると共に、静音化も計れるものである。
又、吸熱回路での凍結防止運転時に回路を切替えて、高温水を循環させて凍結を確実に防止すると共に、低温水を貯湯部の下部に戻すことで温度低下を防止して、効率良く且つ経済的な凍結防止が行えるものである。
又前記構成による請求項８記載の吸熱回路の凍結防止装置によれば、外気温或いは外気温に近い温度を検知する凍結防止センサが所定温度以下を検知することで、吸熱循環ポンプを先ず所定時間駆動した後、吸熱回路の循環温水の温度を温水温度センサで検知して、その温度が所定温度以上の時は、その循環温水の温度に応じて駆動時間と停止時間とを設定し、吸熱循環ポンプを設定した駆動時間駆動し、その後設定した停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻るので、吸熱回路が凍結する恐れがある時には、確実に吸熱循環ポンプを駆動して配管及び吸熱循環ポンプ自身の凍結を防止出来るものであり、しかもその駆動は温水温度を検知してから行われるので、的確で無駄が無く、消費電力を極力抑える事が出来ると共に、駆動時の騒音も最小限にする事ができるものである。
更に循環温水の温度に応じて駆動時間と停止時間とをを決定して吸熱循環ポンプを駆動するので、循環温水の温水温度を検知して、この温度に応じて吸熱循環ポンプの駆動時間を決定するので、的確で経済的な凍結防止運転が行え、消費電力を極力抑える事が出来ると共に、静音化も計れるものである。
又前記構成による請求項９記載の吸熱回路の凍結防止装置によれば、外気温或いは外気温に近い温度を検知する凍結防止センサが所定温度以下を検知することで、吸熱循環ポンプを先ず所定時間駆動した後、吸熱回路の循環温水の温度を温水温度センサで検知して、その温度が所定温度以上の時は、その循環温水の温度に応じて駆動時間と停止時間とを設定し、吸熱循環ポンプを設定した駆動時間駆動し、その後設定した停止時間停止し、その停止時間が経過した時、凍結防止センサが検知する温度による凍結防止運転に戻り、前記凍結防止運転時は、貯湯部上部の高温水を吸熱回路に循環させ、低温となった温水を貯湯部下部に戻すように吸熱回路を切替るので、吸熱回路が凍結する恐れがある時には、確実に吸熱循環ポンプを駆動して配管及び吸熱循環ポンプ自身の凍結を防止出来るものであり、しかもその駆動は温水温度を検知してから行われるので、的確で無駄が無く、消費電力を極力抑える事が出来ると共に、駆動時の騒音も最小限にする事ができるものである。
更に循環温水の温度に応じて駆動時間と停止時間とをを決定して吸熱循環ポンプを駆動するので、循環温水の温水温度を検知して、この温度に応じて吸熱循環ポンプの駆動時間を決定するので、的確で経済的な凍結防止運転が行え、消費電力を極力抑える事が出来ると共に、静音化も計れるものである。
又、吸熱回路での凍結防止運転時に回路を切替えて、高温水を循環させて凍結を確実に防止すると共に、低温水を貯湯部の下部に戻すことで温度低下を防止して、効率良く且つ経済的な凍結防止が行えるものである。
【図面の簡単な説明】
【図１】この発明の風呂回路の一実施形態を付した１缶３回路式給湯暖房装置の概略構成図。
【図２】同風呂回路の凍結防止に関するフローチャート。
【図３】この発明の吸熱回路の一実施形態を付した太陽熱給湯装置の概略構成図。
【図４】同吸熱回路の凍結防止に関するフローチャート。
【符号の説明】
Ｃ風呂回路
５風呂用熱交（熱源部）
２４浴槽
２５風呂往き管
２６風呂戻り管
２７風呂循環ポンプ
２９、５６風呂温度センサ（温水温度センサ）
３０、５５凍結防止センサ（吸熱温度センサ）
３２、５７凍結制御手段
４６吸熱部
４７貯湯部
４８吸熱循環ポンプ
４９吸熱往き管
５０吸熱戻り管
５１吸熱回路
５８回路切替手段[0001]
BACKGROUND OF THE INVENTION
This invention provides a bath circuit for boiling a bath, or hot water obtained by circulating hot water in a heat absorption part, and stores this in a hot water storage part to supply hot water as needed, a fuel cell water heater, etc. The present invention relates to an anti-freezing device for an endothermic circuit.
[0002]
[Prior art]
Conventionally, in this kind of bath circuit and heat absorption circuit, the freezing prevention sensor detects that the outside temperature has dropped below the freezing prevention temperature, drives the circuit circulation pump, and circulates hot water, This was to prevent the circuit from freezing.
[0003]
[Problems to be solved by the invention]
By the way, with this conventional type, the freeze prevention operation of the circulation pump is continued until the outside air temperature rises to the freeze prevention temperature or more, which is uneconomical due to the increased power consumption, and the drive is mainly at midnight, causing noise. Since the actual warm water temperature is not detected by the operation only by detecting the outside air temperature, the circulation pump is operated to prevent freezing even at the warm water temperature where there is no concern about freezing. There was also a possibility, and there was also a problem that accurate and economical freezing prevention operation could not be performed.
[0004]
[Means for Solving the Problems]
  This invention pays attention to this point and solves the above problems.In particular, the structure of the present invention is composed of a heat source part for heating the hot water passing through the interior, a bathtub for storing the heated hot water, and a bath return pipe and a bath return pipe for communicating the heat source part and the bathtub. A bath circuit that circulates hot water with a pump, an antifreeze sensor that detects an outside air temperature or a temperature close to the outside air temperature provided on the heat source unit side, and a hot water temperature sensor that detects the temperature of the circulating hot water in the bath circuit; When the freeze prevention sensor detects a predetermined temperature or lower, the bath circulation pump is driven for a predetermined time, and the bath circulation pump is driven again for a predetermined time until the freeze prevention sensor detects a temperature exceeding the predetermined temperature. The freezing control means includes a freezing control means for detecting the air temperature detected by the hot water temperature sensor after the freezing prevention sensor detects a temperature below a predetermined temperature and drives the bath circulation pump for a predetermined time. When the temperature of the circulating hot water in the circuit is higher than the specified temperature, set the driving time and stop time of the bath circulation pump, drive the driving time set for the bath circulation pump, then stop the set stop time, and stop the stop time When the time elapses, the operation returns to the freeze prevention operation at the temperature detected by the freeze prevention sensor.
  Moreover, in the antifreezing device for a bath circuit according to claim 2 of the present invention, in particular, the configuration includes a heat source part for heating the hot water passing through the inside, a bathtub for storing the heated hot water, a heat source part and the bathtub. A bath circuit comprising a bath return pipe and a bath return pipe that communicate with each other and having a bath circulation pump for circulating hot water, an antifreezing sensor that detects an outside temperature or a temperature close to the outside temperature provided on the heat source side, and a bath A hot water temperature sensor that detects the temperature of the circulating hot water in the circuit, and a bath until the freeze prevention sensor detects a temperature exceeding the predetermined temperature by driving the bath circulation pump for a predetermined time when the freeze prevention sensor detects a temperature lower than the predetermined temperature. And a freeze control means for performing an antifreeze operation for driving the circulation pump again for a predetermined time, wherein the freeze control means detects the temperature of the freeze prevention sensor at a predetermined temperature or less and sets the bath circulation pump at a predetermined time. After driving, when the temperature of the circulating hot water in the bath circuit detected by the hot water temperature sensor is equal to or higher than the predetermined temperature, the driving time is determined according to the temperature of the circulating hot water and the bath circulation pump is driven. The operation is stopped for a certain stop time, and when the stop time elapses, the operation returns to the freeze prevention operation at the temperature detected by the freeze prevention sensor.
  Moreover, in the antifreezing device for a bath circuit according to claim 3 of the present invention, in particular, the configuration includes a heat source part for heating the hot water passing through the inside, a bathtub for storing the heated hot water, a heat source part and the bathtub. A bath circuit comprising a bath return pipe and a bath return pipe that communicate with each other and having a bath circulation pump for circulating hot water, an antifreezing sensor that detects an outside temperature or a temperature close to the outside temperature provided on the heat source side, and a bath A hot water temperature sensor that detects the temperature of the circulating hot water in the circuit, and a bath until the freeze prevention sensor detects a temperature exceeding the predetermined temperature by driving the bath circulation pump for a predetermined time when the freeze prevention sensor detects a temperature lower than the predetermined temperature. And a freeze control means for performing an antifreeze operation for driving the circulation pump again for a predetermined time, wherein the freeze control means detects the temperature of the freeze prevention sensor at a predetermined temperature or less and sets the bath circulation pump at a predetermined time. After driving, when the temperature of circulating hot water in the bath circuit detected by the hot water temperature sensor is higher than the predetermined temperature, set the driving time and stop time of the bath circulating pump according to the temperature of the circulating hot water, and the bath circulating pump Is driven for a set drive time, then stopped for the set stop time, and when the stop time has elapsed, the operation is returned to the freeze-prevention operation based on the temperature detected by the freeze-prevention sensor.
[0005]
  Further, in the anti-freezing device for an endothermic circuit according to claim 4 of the present invention, in particular, the configuration thereof includes an endothermic part in which hot water passing through the inside is heated, a hot water storage part for storing the heated hot water and supplying hot water to a necessary place, An endothermic circuit that has an endothermic return pipe and an endothermic return pipe that communicate the endothermic part and the hot water storage part, and has an endothermic circulation pump that circulates hot water, and detects the outside temperature or a temperature close to the outside temperature on the endothermic part side. An anti-freezing sensor, a hot water temperature sensor provided in the heat absorption circuit for detecting the temperature of circulating hot water, and when the anti-freezing sensor detects a temperature below a predetermined temperature, the heat absorption circulating pump is driven for a predetermined time, and the anti-freezing sensor is set to a predetermined temperature. A freeze control means for performing an antifreeze operation in which the endothermic circulation pump is driven again for a predetermined time until a temperature exceeding the predetermined temperature is detected. After driving the endothermic circulation pump for a predetermined time, if the temperature of the circulating hot water in the endothermic circuit detected by the hot water temperature sensor is higher than the predetermined temperature, set the drive time and stop time of the endothermic circulation pump and set the endothermic circulation pump The driving time is then stopped, and then the set stop time is stopped. When the stop time elapses, the operation is returned to the freeze prevention operation based on the temperature detected by the freeze prevention sensor.
  Further, in the anti-freezing device for an endothermic circuit according to claim 5 of the present invention, in particular, the configuration thereof includes an endothermic part in which hot water passing through the inside is heated, a hot water storage part for storing the heated hot water and supplying hot water to a necessary place, An endothermic circuit that has an endothermic return pipe and an endothermic return pipe that communicate the endothermic part and the hot water storage part, and has an endothermic circulation pump that circulates hot water, and detects the outside temperature or a temperature close to the outside temperature on the endothermic part side. An anti-freezing sensor, a hot water temperature sensor provided in the heat absorption circuit for detecting the temperature of circulating hot water, and when the anti-freezing sensor detects a temperature below a predetermined temperature, the heat absorption circulating pump is driven for a predetermined time, and the anti-freezing sensor is set to a predetermined temperature. And a freezing control means for performing anti-freezing operation in which the endothermic circulation pump is driven again for a predetermined time until a temperature exceeding the temperature is detected. Circulation The freezing control means switches the heat absorption circuit so that the low temperature hot water is returned to the lower part of the hot water storage section, and the freezing control means detects the temperature of the antifreezing sensor below a predetermined temperature and drives the heat absorption circulation pump for a predetermined time. When the temperature of the circulating hot water in the endothermic circuit detected by the temperature sensor is equal to or higher than the specified temperature, set the drive time and stop time of the endothermic circulation pump, drive the endothermic circulation pump for the set drive time, and then set the stop time When the stop time has elapsed and the stop time has elapsed, the operation returns to the freeze prevention operation at the temperature detected by the freeze prevention sensor.
[0006]
  Further, in the anti-freezing device for an endothermic circuit according to claim 6 of the present invention, in particular, the configuration thereof includes an endothermic part where hot water passing through the inside is heated, a hot water storage part for storing the heated hot water and supplying hot water to a necessary location, An endothermic circuit that has an endothermic return pipe and an endothermic return pipe that communicate the endothermic part and the hot water storage part, and has an endothermic circulation pump that circulates hot water, and detects the outside temperature or a temperature close to the outside temperature on the endothermic part side. An anti-freezing sensor, a hot water temperature sensor provided in the heat absorption circuit for detecting the temperature of circulating hot water, and when the anti-freezing sensor detects a temperature below a predetermined temperature, the heat absorption circulating pump is driven for a predetermined time, and the anti-freezing sensor is set to a predetermined temperature. A freeze control means for performing an antifreeze operation in which the endothermic circulation pump is driven again for a predetermined time until a temperature exceeding the predetermined temperature is detected. After the endothermic circulation pump is driven for a predetermined time, if the temperature of the circulating hot water in the endothermic circuit detected by the hot water temperature sensor is higher than the predetermined temperature, the driving time is determined according to the temperature of the circulating hot water and the endothermic circulation pump is driven. Then, the operation is stopped for a predetermined time, and when the stop time has elapsed, the operation returns to the freeze prevention operation at the temperature detected by the freeze prevention sensor.
  Further, in the anti-freezing device for an endothermic circuit according to claim 7 of the present invention, in particular, the configuration thereof includes an endothermic part in which hot water passing through the inside is heated, a hot water storage part for storing the heated hot water and supplying hot water to a necessary place, An endothermic circuit that has an endothermic return pipe and an endothermic return pipe that communicate the endothermic part and the hot water storage part, and has an endothermic circulation pump that circulates hot water, and detects the outside temperature or a temperature close to the outside temperature on the endothermic part side. An anti-freezing sensor, a hot water temperature sensor provided in the heat absorption circuit for detecting the temperature of circulating hot water, and when the anti-freezing sensor detects a temperature below a predetermined temperature, the heat absorption circulating pump is driven for a predetermined time, and the anti-freezing sensor is set to a predetermined temperature. And a freezing control means for performing anti-freezing operation in which the endothermic circulation pump is driven again for a predetermined time until a temperature exceeding the temperature is detected. Circulation The freezing control means switches the heat absorption circuit so that the low temperature hot water is returned to the lower part of the hot water storage section, and the freezing control means detects the temperature of the antifreezing sensor below a predetermined temperature and drives the heat absorption circulation pump for a predetermined time. When the temperature of the circulating hot water in the heat absorption circuit detected by the temperature sensor is equal to or higher than the predetermined temperature, the driving time is determined according to the temperature of the circulating hot water to drive the heat absorption circulating pump, and then the stop time, which is the predetermined time, is stopped. When the stop time has elapsed, the operation returns to the freeze prevention operation at the temperature detected by the freeze prevention sensor.
[0007]
  Further, in the anti-freezing device for an endothermic circuit according to claim 8 of the present invention, in particular, the configuration thereof includes an endothermic part in which hot water passing through the inside is heated, a hot water storage part for storing the heated hot water and supplying hot water to a necessary place, An endothermic circuit that has an endothermic return pipe and an endothermic return pipe that communicate the endothermic part and the hot water storage part, and has an endothermic circulation pump that circulates hot water, and detects the outside temperature or a temperature close to the outside temperature on the endothermic part side. An anti-freezing sensor, a hot water temperature sensor provided in the heat absorption circuit for detecting the temperature of circulating hot water, and when the anti-freezing sensor detects a temperature below a predetermined temperature, the heat absorption circulating pump is driven for a predetermined time, and the anti-freezing sensor is set to a predetermined temperature. A freeze control means for performing an antifreeze operation in which the endothermic circulation pump is driven again for a predetermined time until a temperature exceeding the predetermined temperature is detected. After the endothermic circulation pump is driven for a predetermined time, if the temperature of the circulating hot water in the heat absorption circuit detected by the hot water temperature sensor is equal to or higher than the predetermined temperature, the drive time and stop time of the endothermic circulation pump are set according to the temperature of the circulating hot water Then, the heat absorption circulation pump is driven for the set drive time, and then the set stop time is stopped. When the stop time has elapsed, the freeze prevention operation is returned to the temperature detected by the freeze prevention sensor.
  Further, in the antifreezing device for an endothermic circuit according to claim 9 of the present invention, in particular, the configuration thereof includes an endothermic part where hot water passing through the inside is heated, a hot water storage part for storing the heated hot water and supplying hot water to a necessary place, An endothermic circuit that has an endothermic return pipe and an endothermic return pipe that communicate the endothermic part and the hot water storage part, and has an endothermic circulation pump that circulates hot water, and detects the outside temperature or a temperature close to the outside temperature on the endothermic part side. An anti-freezing sensor, a hot water temperature sensor provided in the heat absorption circuit for detecting the temperature of circulating hot water, and when the anti-freezing sensor detects a temperature below a predetermined temperature, the heat absorption circulating pump is driven for a predetermined time, and the anti-freezing sensor is set to a predetermined temperature. And a freezing control means for performing anti-freezing operation in which the endothermic circulation pump is driven again for a predetermined time until a temperature exceeding the temperature is detected. Circulation The freezing control means switches the heat absorption circuit so that the low temperature hot water is returned to the lower part of the hot water storage section, and the freezing control means detects the temperature of the antifreezing sensor below a predetermined temperature and drives the heat absorption circulation pump for a predetermined time. When the temperature of circulating hot water in the endothermic circuit detected by the temperature sensor is equal to or higher than the specified temperature, the driving time and stop time of the endothermic circulating pump are set according to the temperature of the circulating hot water, and the driving time set for the endothermic circulating pump The motor is driven and then stopped for a set stop time. When the stop time has elapsed, the operation returns to the freeze prevention operation at the temperature detected by the freeze prevention sensor.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, a freeze prevention device for a bath circuit according to the present invention will be described with reference to an embodiment of a one-can three-circuit hot water supply device shown in FIGS.
[0009]
Reference numeral 1 denotes a heating can body having a combustion chamber 3 having a heating burner section 2 at the lower portion. Inside the can body 1, heat for hot water supply that constitutes a heat exchanger for indirect heating hot water supply by a serpentine tube AC 4 and bath heat exchanger 5 constituting a heat exchanger for indirect heating bathing using a serpentine tube are arranged vertically so that hot water heating and hot water supply and bathing can be performed simultaneously or independently. This bath heat exchanger 5 constitutes a heat source part.
[0010]
First, the heating circuit A will be described. 6 is a heating forward pipe, 7 is a heating radiator such as a floor heating panel, 8 is a heating return pipe, 9 is a heating circulation pump, 10 is a gas-liquid separator, and 11 is An expansion tank for heating, 12 is a heating bypass pipe provided with an on-off valve 13, and 14 is a can body temperature sensor used for temperature control of the heating can body 1. The heat medium heated to the control target temperature (about 60 ° C. to 85 ° C.) of the body temperature sensor 14 is sent to the heating radiator 7 via the heating forward pipe 6 by the heating circulation pump 9 to perform heating. The low-temperature water (about 30 ° C. to 50 ° C.) radiated by the heating radiator 7 returns to the heating can 1 through the heating return pipe 8 and is heated to the control target temperature and circulated again.
[0011]
Next, the hot water supply circuit B will be described. 15 is a water supply pipe connected to the water supply, 16 is a flow rate sensor for detecting the flow rate of water, 17 is a hot water supply pipe for discharging hot water heated by the heat exchanger 4 for hot water supply, and 18 is A hot-water tap 19 is connected to the hot-water pipe 17 through the mixing valve 20 and connects the hot-water pipe 15 and the hot-water pipe 17, and 21 is an expansion tank for hot-water supply that absorbs thermal expansion when the hot-water tap 18 is closed. , 22 is a hot water temperature sensor, and 23 is a hot water temperature sensor. When the hot water tap 18 is opened and the flow rate sensor 16 detects the minimum operating flow rate, the temperature of the heat medium in the heating can 1 is as high as about 80 ° C. The burner unit 2 is combusted so that the cold water from the water supply pipe 15 is indirectly heated by the high-temperature heat medium in the heating can 1 in the hot water supply heat exchanger 4 and mixed with the tap water in the mixing valve 20. Is the hot water tap adjusted to an appropriate temperature? It is intended to be hot water supply.
[0012]
Next, the bath circuit C will be described. 24 is a bathtub, 25 is a bath outlet pipe, 26 is a bath return pipe, 27 is a bath circulation pump provided in the return pipe 26, 28 is a water flow switch for detecting the presence or absence of circulation, 29 Is a bath temperature sensor, and when there is a request to boil the hot water in the bathtub 24, the hot water in the bathtub 24 is circulated to the heat exchanger 5 for the bath by the bath circulation pump 27, and the hot water in the bathtub 24 is heated to the heating can 1 The hot water in the bathtub 24 is heated up to an appropriate temperature or kept warm by being indirectly heated by a high-temperature heat medium, and the bath temperature sensor 29 also serves as a hot water temperature sensor.
[0013]
Reference numeral 30 denotes an anti-freezing sensor, which is provided in a frame 31 that accommodates the above-described parts and is installed outdoors. The temperature in the frame 31 is reduced to 5 ° C. or less of the anti-freezing temperature. The prevention sensor 30 detects and the bath circulation pump 27 is first driven for one minute, and the hot water temperature at this time is detected by the bath temperature sensor 29 which also serves as the hot water temperature sensor, and the freezing comprising the microcomputer is performed according to the hot water temperature at this time. The control means 32 determines the subsequent ON / OFF ratio of the bath circulation pump 27, and performs anti-freezing control according to this.
Here, when the hot water temperature is 15 ° C. or higher, it is turned off for 30 minutes and controlled for 1 minute. When the hot water temperature is 1 ° C. to 4 ° C., it is turned off for 30 minutes and then controlled for 4 minutes. The control is performed so as not to turn it on.
[0014]
A hot water supply pipe 33 is branched from the hot water supply pipe 17 of the hot water supply circuit B and is connected to the bath circuit C via the hot water filling valve 34 and the three-way valve 35. The bath circuit C and the hot water pipe 33 are switched so as to communicate with each other, and the hot water valve 34 is opened, and the hot water heated by the hot water supply heat exchanger 4 flows into the bath circuit C, and a certain amount is supplied to the bathtub 24. Hot water filling is performed.
[0015]
Here, 36 is a communication pipe that connects the upper and lower portions of the heating can body 1, and 37 is a stirring circulation pump provided in the middle of the communication pipe 36, which is driven during hot water supply or bath operation, The temperature inside is made uniform up and down, and stirring is continued until the hot water supply or bath operation is completed. Since the heating circulation pump 9 is driven during the heating operation, the stirring circulation pump 37 can be prevented from being driven.
[0016]
Next, the operation of this embodiment will be described.
First, the heating operation will be described. The can body temperature sensor 14 detects the hot water temperature in the heating can body 1, and when this temperature is a high temperature heating load, it is about 80 ° C., and when the temperature is a low temperature heating load, about 60 ° C. The combustion of the burner unit 2 is controlled so that the heating circulation pump 9 is driven so that the heated heat medium such as hot water, circulating liquid or antifreeze liquid in the heating can body 1 is heated. The circulation is repeated to return to the heating can 1 again, and the heating radiator 7 is used to heat the room.
[0017]
Next, in the hot water supply operation, when the heating operation is being performed, the inside of the heating can 1 is already hot, so if the hot water tap 18 is opened, the low-temperature water from the water supply pipe 15 is immediately used for hot water supply. The heat exchanger 4 indirectly heats by the high-temperature heat medium in the heating can body 1, and at the same time, the stirring circulation pump 37 is driven and hot water in the lower portion of the can body 1 is connected to the upper portion of the can body 1 through the communication pipe 36. The heating can body 1 is agitated to eliminate the temperature difference between the upper and lower portions in the heating can body 1, and hot water at a desired temperature is supplied so that the heat exchange can always be performed with the same heat exchange efficiency. It is.
[0018]
At this time, the heating medium which has been used for heating and whose temperature has been lowered flows into the heating can body 1, and this returning heating medium is at a relatively high temperature of about 30 ° C. to 60 ° C., which is a conventional hot water can. Since the temperature is sufficiently higher than the low-temperature tap water in the case of the body, the temperature in the can body 1 does not drop suddenly, and the necessary amount of heat for hot water supply is ensured while heating. Hot water supply at a stable temperature can be performed, and heat exchange for hot water supply can be performed by the heat exchange 4 for hot water supply in the heating can 1 to perform direct pressure hot water supply using the water pressure as it is.
[0019]
Since the heating circulation pump 9 is driven during the heating operation, the temperature difference between the upper and lower sides in the heating can 1 is eliminated to some extent, so that the stirring circulation pump 37 can be prevented from being driven. However, if the circulating pump for stirring 37 is driven, the temperature difference is further eliminated. Moreover, in the simultaneous operation of heating and hot water supply, it is also possible to improve the heat exchange efficiency in the hot water supply heat exchanger 4 by setting the control target temperature of the heating can 1 higher than that in the single heating operation. .
[0020]
Here, the case where the heating operation is not performed before the hot water supply operation will be described. When the user turns on a hot water supply operation switch such as a remote controller (not shown), combustion is started in the burner unit 2 and detected by the can body temperature sensor 14. The temperature of the heating can body 1 is heated to a control target temperature of about 85 ° C., the stirring circulation pump 37 is driven, and hot water at the lower portion of the can body 1 is supplied to the upper portion of the can body 1 through the communication pipe 36. The heating can body 1 is agitated to eliminate the temperature difference between the upper and lower portions in the heating can body 1 so that heat exchange can always be performed with the same heat exchange efficiency, and the system waits until the hot water tap 18 is opened.
[0021]
When the hot water tap 18 is opened, the cold water from the city water that has passed through the hot water supply heat exchanger 4 is indirectly heated by the heat medium in the heating can 1 maintained at a high temperature, so that hot water having a desired temperature is obtained. To be supplied. If the hot water is not supplied again within a certain time (for example, 4 hours) from the end of hot water supply during an unnecessary period of heating operation such as summer, the hot water supply operation switch is automatically turned off to It is also possible to measure energy saving by releasing the holding state of the can 1 at the control target temperature.
[0022]
Next, in the bath operation, when there is a request for boiling the hot water in the bathtub 24 such as turning on a bath heat switch of a remote controller (not shown), the bath circulation pump 27 is driven to exchange the hot water in the bathtub 24 with heat exchange for the bath. 5 is heated by a heat medium in the heating can 1 held at a high temperature to reheat the hot water in the bathtub 24 to a desired temperature or keep it warm. When a desired temperature is detected, it is automatically stopped.
[0023]
At this time, a heating medium with a relatively high temperature returns to the heating can 1 as in the hot water supply operation, so that the temperature in the can 1 does not drop suddenly and heating is performed. While ensuring the necessary amount of heat for bathing, the bath can be reheated or kept warm, and the stirring circulation pump 37 eliminates the temperature difference between the upper and lower sides of the heating can 1 so that the same heat is always maintained. It is possible to realize bathing where the boiling time does not vary greatly due to the exchange efficiency.
[0024]
Further, in the case of simultaneous operation of hot water supply and bath, as in the case of single operation of hot water supply, if the heating can body 1 is temperature-controlled without driving the heating circulation pump 9 and the above hot water supply operation and bath operation are performed simultaneously. Well, in the case of simultaneous operation of hot water supply, bath and heating, it is possible to control the hot water supply temperature and the bath temperature at the same time as in the simultaneous operation of hot water supply and heating or the simultaneous operation of bath and heating.
[0025]
Next, the freezing prevention operation in the bath circuit C will be described with reference to the flowchart shown in FIG. 2. When the outside air temperature falls and the inside of the frame 31 falls below 5 ° C. of the freezing prevention temperature, the freezing prevention sensor 30 detects this temperature. (Step 38), the process proceeds to Step 39 with YES, and the bath circulation pump 27 is first driven for 1 minute.
[0026]
In step 40, the current hot water temperature is detected by the bath temperature sensor 29. If the temperature is 15 ° C. or more, the process proceeds to step 41 with YES, and the bath circulation pump 27 by the freezing control means 32 is turned on for 1 minute and turned off for 30 minutes. The control is performed and the process returns to step 38 again, and this is repeated until the freeze prevention sensor 30 detects 5 ° C. or more.
[0027]
If the hot water temperature is 14 ° C. or lower in step 40, the process proceeds to ON in step 42 to determine whether the hot water temperature is 1 ° C. to 14 ° C. 27 is turned on for 4 minutes and is turned off for 30 minutes, and the process returns to step 38 and is repeated.
[0028]
Further, if the hot water temperature is lower than 1 ° C in step 42, the process proceeds to ON in step 44 to determine whether the hot water temperature is 0 ° C or less. In YES, the process proceeds to step 45 and the freezing control means 32 turns off the bath circulation pump 27. The control is continued to return to step 38 and this is repeated, but if it is ON at step 44, the process returns to step 40.
[0029]
Accordingly, when the bath circuit C is likely to freeze, the bath circulation pump 27 can be reliably driven to prevent the piping and the bath circulation pump 27 itself from freezing, and the drive is performed after the hot water temperature is detected. Since it is performed, it is accurate and wasteless, power consumption can be suppressed as much as possible, and noise during driving can be minimized.
[0030]
Next, the anti-freezing device for the heat absorption circuit will be described by taking the solar water heater shown in FIGS. 3 and 4 as an example.
Reference numeral 46 denotes an endothermic part composed of a collector installed on the roof of the house, etc., which heats the hot water flowing inward by receiving solar heat.
[0031]
Reference numeral 47 denotes a hot water storage section that communicates with the heat absorption section 46 through an endothermic circuit 51 including an endothermic forward pipe 49 having an endothermic circulation pump 48 and an endothermic return pipe 50, and communicates with the lower part of the hot water storage section 47 by driving the endothermic circulation pump 48. The low-temperature water is supplied to the heat-absorbing section 46 through the endothermic forward pipe 49, the heated high-temperature water is returned by the heat-absorbing return pipe 50 connected to the upper part of the hot-water storage section 47, and this circulation is sequentially repeated to store the high-temperature water. is there.
[0032]
52 is a hot water pipe that communicates the top of the hot water storage section 47 with the hot water tap 53. By opening the hot water tap 53 as necessary, hot water in the hot water storage section 47 can be supplied, and this hot water is reduced. Water is supplied to the hot water storage section 47 through the water supply pipe 54.
[0033]
Reference numeral 55 denotes an endothermic temperature sensor provided in the endothermic unit 46, which detects the temperature in the endothermic unit 46 and detects a predetermined high temperature, thereby driving the endothermic circulation pump 48 of the endothermic circuit 51 to start the endotherm. The endothermic temperature sensor 55 also detects a freezing prevention temperature of the heat absorbing portion 46 of 5 ° C. or less, and also serves as a freezing prevention sensor that drives the endothermic circulation pump 48 for 1 minute.
[0034]
Reference numeral 56 denotes a hot water temperature sensor provided in the heat absorption circuit 51. When the heat absorption circulation pump 48 is driven below the freezing prevention temperature, the hot water temperature at this time is detected, and the hot water storage unit 47 is provided according to the detected temperature. The freezing control means 57 composed of a microcomputer determines the subsequent ON / OFF ratio of the endothermic circulation pump 27 and carries out antifreezing control according to this.
Here, when the hot water temperature is 15 ° C. or higher, it is turned off for 30 minutes and controlled for 1 minute. When the hot water temperature is 1 ° C. to 4 ° C., it is turned off for 30 minutes and then controlled for 4 minutes. The control is performed so as not to turn it on.
[0035]
58 is a circuit switching means provided between the endothermic circulation pump 48 and the hot water storage section 47 in the middle of the endothermic circuit 51, and a first three-way valve 59 provided in the endothermic forward pipe 49 by means of a signal from the freezing control means 57; The second three-way valve 60 provided in the return pipe 50 is switched to circulate hot water in the upper part of the hot water storage section 47 during the freeze prevention operation so that the hot water whose temperature has decreased is returned to the lower part of the hot water storage section 47.
[0036]
Next, the operation of this heat absorption circuit will be described.
When sunlight hits the endothermic part 46 and the temperature rises to a predetermined high temperature, the endothermic temperature sensor 55 detects this, and drives the endothermic circulation pump 48 to drive the low-temperature water below the hot water storage part 47 to the endothermic forward pipe 49. The hot water storage section 47 is filled with the high temperature water by sequentially repeating the circulation through the heat absorption section 46 through the heat exchanger to obtain high temperature water and then returning to the upper part of the hot water storage section 47 through the heat absorption return pipe 50. When the hot water storage section 47 reaches a predetermined temperature, the endothermic circulation pump 48 is automatically stopped.
[0037]
In this state, by opening the hot-water tap 53, the hot water stored in the hot water storage section 47 is supplied with hot water and used appropriately. When the hot water decreases with this hot water supply, the hot water storage section 47 is replenished with hot water. It is what is done.
[0038]
Next, the antifreezing control of the endothermic circuit will be described according to the flowchart shown in FIG. 4. When the outside air temperature decreases and the inside of the endothermic portion 46 falls below the antifreezing temperature of 5 ° C., the endothermic temperature sensor 55 detects this temperature. (Step 61) If YES, the program proceeds to Step 62, where the heat absorption circulating pump 48 is first driven for 1 minute, and the circuit switching means 58 switches the circuit.
[0039]
Then, in step 63, the current hot water temperature is detected by the hot water temperature sensor 56, and if it is 15 ° C. or higher, the process proceeds to step 64 with YES, and the endothermic circulation pump 48 by the freezing control means 57 is turned on for 1 minute and turned off for 30 minutes. Control is performed and the process returns to step 6 again, and this is repeated until the endothermic temperature sensor 55 detects 5 ° C. or higher.
[0040]
If the hot water temperature is 14 ° C. or less in step 63, the process proceeds to ON in step 65 to determine whether the hot water temperature is 1 ° C. to 14 ° C., and in YES, the process proceeds to step 66 and the endothermic circulation pump by the freezing control means 57 48 is turned on for 4 minutes and turned off for 30 minutes, and the process returns to step 61 again.
[0041]
Further, if the hot water temperature is lower than 1 ° C. in step 65, the process proceeds to ON in step 67 to determine whether the hot water temperature is 0 ° C. or less. In YES, the process proceeds to step 68 and the freeze control means 57 turns off the endothermic circulation pump 48. The control is continued to return to step 61 and this is repeated, but if it is ON at step 67, the process returns to step 63.
[0042]
Therefore, when there is a possibility that the endothermic circuit 51 is frozen, the endothermic circulation pump 48 can be reliably driven to prevent the piping and the endothermic circulation pump 48 itself from freezing, and the drive detects the actual hot water temperature. Since the driving time is changed according to this temperature, it is possible to reduce the power consumption as much as possible and to minimize the noise during driving because the driving time is changed according to the temperature.
[0043]
Further, during the freeze prevention operation, the heat absorption circuit 51 is also switched by the circuit switching means 58, so that freezing is reliably prevented by circulation of the high temperature water, and the low temperature water after circulation is returned to the lower part of the hot water storage section 47. The water temperature is not drastically decreased, and the freezing prevention can be efficiently performed from the hot water storage side.
[0044]
In this embodiment, the ON time of the circulation pump is varied and the OFF time is constant. However, the present invention is not limited to this. For example, the OFF time may be varied in the reverse manner. Is something that can be considered intermittently. Furthermore, although the heat absorption circuit has been described with a solar water heater, the present invention is not limited to this, and the same effect can be obtained with a hot water heater for a fuel cell or an electric water heater, which has become a hot topic in recent years.
[0045]
【The invention's effect】
  As described above, according to the freeze prevention device for a bath circuit of the first aspect, the freeze prevention sensor that detects the outside temperature or the temperature close to the outside temperature detects the temperature below the predetermined temperature, so that the bath circulation pump is first set to the predetermined time. After driving, the temperature of the hot water in the bath circuit is detected by the hot water temperature sensor, and when the temperature is higher than the predetermined temperature, the bath circulation pump drive time and stop time are set, and the bath circulation pump is set The drive time is driven, and then the set stop time is stopped. When the stop time has passed, the operation returns to the freeze prevention operation at the temperature detected by the freeze prevention sensor. The pump can be used to prevent freezing of the piping and bath circulation pump itself, and since the drive is performed after detecting the hot water temperature, it is accurate, wasteless, and consumes minimal power. Together can be suppressed, noise at the time of driving is also one that can be minimized.
  According to the anti-freezing device for a bath circuit according to claim 2, wherein the anti-freezing sensor for detecting the outside air temperature or a temperature close to the outside air temperature detects the temperature below the predetermined temperature, the bath circulation pump is first set to the predetermined time. After driving, the temperature of the circulating hot water in the bath circuit is detected by the hot water temperature sensor, and when the temperature is higher than the predetermined temperature, the driving time is determined according to the temperature of the circulating hot water and the bath circulation pump is driven. After that, the stop time is stopped for a predetermined time, and when the stop time has elapsed, the operation returns to the freeze prevention operation at the temperature detected by the freeze prevention sensor. It can be driven to prevent freezing of the piping and bath circulation pump itself, and since the drive is performed after detecting the temperature of the hot water, it is accurate and has no waste, minimizing power consumption. Things along with the can, the noise at the time of driving is also one that can be minimized.
  Furthermore, since the driving time is determined according to the temperature of the circulating hot water and the bath circulation pump is driven, the hot water temperature of the circulating hot water is detected and the driving time of the bath circulating pump is determined according to this temperature. Economical anti-freezing operation can be performed, power consumption can be minimized, and noise reduction can be achieved.
  According to the freeze prevention device for a bath circuit according to claim 3, the bath circulation pump is first driven for a predetermined time when the freeze prevention sensor for detecting an outside temperature or a temperature close to the outside temperature detects a predetermined temperature or less. After that, the temperature of the circulating hot water in the bath circuit is detected by the hot water temperature sensor, and when the temperature is higher than the predetermined temperature, the drive time and stop time are set according to the temperature of the circulating hot water, and the bath circulation pump Drive for the set drive time, then stop for the set stop time, and when the stop time has elapsed, the freeze protection operation returns to the temperature detected by the freeze prevention sensor. It is possible to prevent the freezing of the piping and the bath circulation pump by driving the bath circulation pump, and the drive is performed after detecting the hot water temperature. As much as possible together it is possible to reduce power consumption, noise at the time of driving is also one that can be minimized.
  Furthermore, since the bath circulation pump is driven by determining the driving time and the stop time according to the temperature of the circulating hot water, the hot water temperature of the circulating hot water is detected, and the driving time and the stopping time of the bath circulating pump according to this temperature Therefore, accurate and economical freezing prevention operation can be performed, power consumption can be suppressed as much as possible, and noise reduction can be achieved.
[0046]
  According to the anti-freezing device for a heat absorption circuit according to claim 4, wherein the anti-freezing sensor for detecting the outside air temperature or a temperature close to the outside air temperature detects the temperature below a predetermined temperature, the heat absorption circulation pump is first driven for a predetermined time. After that, detect the temperature of circulating hot water in the endothermic circuit with the hot water temperature sensor, and when the temperature is higher than the predetermined temperature, set the driving time and stop time of the endothermic circulating pump, and set the endothermic circulating pump to drive Drives for a period of time, then stops for the set stop time, and when the stop time elapses, it returns to the freeze prevention operation at the temperature detected by the freeze prevention sensor. To prevent freezing of the piping and the endothermic circulation pump itself, and since the drive is performed after detecting the hot water temperature, there is no waste and power consumption Together can be suppressed as much as possible, the noise at the time of driving is also one that can be minimized.
  According to the anti-freezing device for the heat absorption circuit according to claim 5 having the above-described configuration, the anti-freezing sensor for detecting the outside air temperature or a temperature close to the outside air temperature first detects the temperature below the predetermined temperature, thereby driving the endothermic circulation pump first for a predetermined time. After that, detect the temperature of circulating hot water in the endothermic circuit with the hot water temperature sensor, and when the temperature is higher than the predetermined temperature, set the driving time and stop time of the endothermic circulating pump, and set the endothermic circulating pump to drive Drives for a period of time, then stops for the set stop time, and when the stop time has elapsed, returns to the freeze prevention operation at the temperature detected by the freeze prevention sensor. The heat absorption circuit is switched so that the hot water having a low temperature is returned to the lower part of the hot water storage section, so when there is a possibility that the heat absorption circuit may freeze, the heat absorption circulation pump is surely driven to connect the pipe and the heat absorption circuit. The pump itself can be prevented from freezing, and it is driven after detecting the temperature of the hot water, so it is accurate, wasteless, power consumption can be minimized, and noise during driving is minimized. It is something that can be done.
  In addition, the anti-freezing operation in the endothermic circuit is switched to prevent the freezing by circulating the high temperature water, and the low temperature water is returned to the lower part of the hot water storage section to prevent the temperature from being lowered. Economical freezing prevention can be performed.
  According to the anti-freezing device for a heat absorption circuit according to claim 6, the anti-freezing sensor for detecting the outside air temperature or a temperature close to the outside air temperature first detects a temperature equal to or lower than a predetermined temperature, so that the endothermic circulation pump is first set for a predetermined time. After driving, the temperature of the circulating hot water in the heat absorption circuit is detected by the hot water temperature sensor, and when the temperature is higher than the predetermined temperature, the driving time is determined according to the temperature of the circulating hot water and the endothermic circulation pump is driven. After that, when the stop time is stopped for a predetermined time and the stop time has elapsed, the operation returns to the freeze prevention operation at the temperature detected by the freeze prevention sensor. It can be driven to prevent freezing of the piping and the endothermic circulation pump itself, and the drive is performed after detecting the temperature of the hot water, so it is accurate and wasteful, minimizing power consumption. Things along with the can, the noise at the time of driving is also one that can be minimized.
  Furthermore, since the endothermic circulation pump is driven by determining the driving time according to the temperature of the circulating hot water, the temperature of the circulating hot water is detected and the driving time of the endothermic circulation pump is determined according to this temperature. Economical anti-freezing operation can be performed, power consumption can be minimized, and noise reduction can be achieved.
  According to the anti-freezing device for the heat absorption circuit according to claim 7, wherein the anti-freezing sensor for detecting the outside air temperature or a temperature close to the outside air temperature first detects the temperature below the predetermined temperature, thereby driving the endothermic circulation pump first for a predetermined time. After that, the temperature of the circulating hot water in the heat absorption circuit is detected by the hot water temperature sensor, and when the temperature is higher than the predetermined temperature, the driving time is set according to the temperature of the circulating hot water and the heat absorption circulating pump is set Drive for a period of time, then stop for a predetermined time, and when the stop time has elapsed, return to the anti-freezing operation at the temperature detected by the anti-freezing sensor, and during the anti-freezing operation, Since the endothermic circuit is switched so as to circulate through the endothermic circuit and return the low temperature hot water to the lower part of the hot water storage section, when there is a risk of the endothermic circuit freezing, the endothermic circulation pump is surely driven to connect the piping and The circulation pump itself can be prevented from freezing, and it is driven after detecting the temperature of the hot water, so it is accurate and wasteful, and it can reduce power consumption as much as possible while minimizing noise during driving. It can be made.
  Furthermore, since the endothermic circulation pump is driven by determining the driving time according to the temperature of the circulating hot water, the temperature of the circulating hot water is detected and the driving time of the endothermic circulation pump is determined according to this temperature. Economical anti-freezing operation can be performed, power consumption can be minimized, and noise reduction can be achieved.
  In addition, the anti-freezing operation in the endothermic circuit is switched to prevent the freezing by circulating the high temperature water, and the low temperature water is returned to the lower part of the hot water storage section to prevent the temperature from being lowered. Economical freezing prevention can be performed.
  According to the anti-freezing device for an endothermic circuit according to claim 8 having the above-described configuration, the anti-freezing sensor for detecting the outside air temperature or a temperature close to the outside air temperature first detects the temperature below the predetermined temperature, so that the endothermic circulation pump is first set to the predetermined time After driving, the temperature of the circulating hot water in the heat absorption circuit is detected by the hot water temperature sensor, and when the temperature is higher than the predetermined temperature, the driving time and stop time are set according to the temperature of the circulating hot water, and the endothermic circulation Drive the pump for the set drive time, then stop for the set stop time, and when the stop time has elapsed, return to the freeze prevention operation by the temperature detected by the freeze prevention sensor, so when there is a possibility that the heat absorption circuit may freeze, The endothermic circulation pump can be reliably driven to prevent freezing of the piping and the endothermic circulation pump itself, and since the drive is performed after detecting the hot water temperature, it is accurate and wasteful. , As much as possible together it is possible to reduce power consumption, noise at the time of driving it is also one that can be minimized.
  Furthermore, since the endothermic circulation pump is driven by determining the drive time and stop time according to the temperature of the circulating hot water, the hot water temperature of the circulating hot water is detected and the driving time of the endothermic circulation pump is determined according to this temperature. Therefore, accurate and economical freezing prevention operation can be performed, power consumption can be suppressed as much as possible, and noise reduction can be achieved.
  According to the anti-freezing device for an endothermic circuit according to claim 9, wherein the anti-freezing sensor for detecting the outside air temperature or a temperature close to the outside air temperature detects the temperature below a predetermined temperature, the endothermic circulation pump is first set for a predetermined time. After driving, the temperature of the circulating hot water in the heat absorption circuit is detected by the hot water temperature sensor, and when the temperature is higher than the predetermined temperature, the driving time and stop time are set according to the temperature of the circulating hot water, and the endothermic circulation The pump is driven for the set drive time, then stopped for the set stop time, and when the stop time has elapsed, the operation returns to the freeze prevention operation at the temperature detected by the freeze prevention sensor. The endothermic circuit is switched so that the hot water is circulated through the endothermic circuit and the low temperature hot water is returned to the lower part of the hot water storage section. In addition, the endothermic circulation pump itself can be prevented from freezing, and the drive is performed after detecting the temperature of the hot water, so it is accurate and wasteful, and can reduce power consumption as much as possible. It can be minimized.
  Furthermore, since the endothermic circulation pump is driven by determining the drive time and stop time according to the temperature of the circulating hot water, the hot water temperature of the circulating hot water is detected and the driving time of the endothermic circulation pump is determined according to this temperature. Therefore, accurate and economical freezing prevention operation can be performed, power consumption can be suppressed as much as possible, and noise reduction can be achieved.
  In addition, the anti-freezing operation in the endothermic circuit is switched to prevent the freezing by circulating the high temperature water, and the low temperature water is returned to the lower part of the hot water storage section to prevent the temperature from being lowered. Economical freezing prevention can be performed.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic configuration diagram of a one-can three-circuit hot water supply / air-heating device with an embodiment of a bath circuit according to the present invention.
FIG. 2 is a flowchart regarding freeze prevention of the bath circuit.
FIG. 3 is a schematic configuration diagram of a solar water heater with an embodiment of the heat absorption circuit of the present invention.
FIG. 4 is a flowchart regarding freeze prevention of the heat absorption circuit.
[Explanation of symbols]
C bath circuit
5 Heat exchange for bath (heat source part)
24 Bathtub
25 Bath-out pipe
26 Bath return pipe
27 Bath circulation pump
29, 56 Bath temperature sensor (hot water temperature sensor)
30, 55 Freezing prevention sensor (endothermic temperature sensor)
32, 57 Freezing control means
46 Endothermic part
47 Hot water storage
48 Endothermic circulation pump
49 Endothermic tube
50 Endothermic return pipe
51 Endothermic circuit
58 Circuit switching means

Claims

It consists of a heat source part that heats the hot water that passes through it, a bathtub that stores the heated hot water, a bath pipe that connects the heat source part and the bathtub, and a bath return pipe that has a bath circulation pump to circulate the hot water. A bath circuit , an antifreeze sensor for detecting an outside air temperature or a temperature close to the outside air temperature provided on the heat source unit side, a hot water temperature sensor for detecting the temperature of circulating hot water in the bath circuit, and the antifreeze sensor are below a predetermined temperature And a freezing control means for driving the bath circulation pump for a predetermined time until the freeze prevention sensor detects a temperature exceeding the predetermined temperature and performing the antifreezing operation for driving the bath circulation pump again for the predetermined time. The freezing control means detects the temperature of the circulating hot water in the bath circuit detected by the hot water temperature sensor after the antifreezing sensor detects a temperature below the predetermined temperature and drives the bath circulation pump for a predetermined time. If it is higher than that, set the bath circulation pump drive time and stop time, drive the bath circulation pump for the set drive time, then stop for the set stop time, and when the stop time has passed, freeze prevention sensor An anti- freezing device for a bath circuit, wherein the operation returns to the anti-freezing operation at the temperature detected by

It consists of a heat source part that heats the hot water that passes through it, a bathtub that stores the heated hot water, a bath pipe that connects the heat source part and the bathtub, and a bath return pipe that has a bath circulation pump to circulate the hot water. A bath circuit, an antifreeze sensor for detecting an outside air temperature or a temperature close to the outside air temperature provided on the heat source unit side, a hot water temperature sensor for detecting the temperature of circulating hot water in the bath circuit, and the antifreeze sensor are below a predetermined temperature And a freezing control means for driving the bath circulation pump for a predetermined time until the freeze prevention sensor detects a temperature exceeding the predetermined temperature and performing the antifreezing operation for driving the bath circulation pump again for the predetermined time. The freezing control means detects the temperature of the circulating hot water in the bath circuit detected by the hot water temperature sensor after the antifreezing sensor detects a temperature below the predetermined temperature and drives the bath circulation pump for a predetermined time. When the temperature exceeds the limit, the driving time is determined according to the temperature of the circulating hot water, the bath circulation pump is driven, and then the stop time, which is a predetermined time, is stopped. The bath circuit freeze prevention device is characterized in that the operation returns to the freeze prevention operation depending on the temperature of the bath.

It consists of a heat source part that heats the hot water that passes through the interior, a bathtub that stores the heated hot water, a bath pipe that connects the heat source part and the bathtub, and a bath return pipe that has a bath circulation pump and circulates the hot water. A bath circuit, an antifreeze sensor for detecting an outside air temperature or a temperature close to the outside air temperature provided on the heat source unit side, a hot water temperature sensor for detecting the temperature of circulating hot water in the bath circuit, and the antifreeze sensor are below a predetermined temperature And a freezing control means for driving the bath circulation pump for a predetermined time until the freeze prevention sensor detects a temperature exceeding the predetermined temperature and performing the antifreezing operation for driving the bath circulation pump again for the predetermined time. The freezing control means detects the temperature of the circulating hot water in the bath circuit detected by the hot water temperature sensor after the antifreezing sensor detects a temperature below the predetermined temperature and drives the bath circulation pump for a predetermined time. When the temperature is higher than this, set the bath circulation pump drive time and stop time according to the temperature of the circulating hot water, drive the bath circulation pump set drive time, then stop the set stop time, then stop the stop time An anti-freezing device for a bath circuit that returns to the anti-freezing operation at the temperature detected by the anti-freezing sensor when elapses.

An endothermic circulation pump consisting of an endothermic part where the hot water passing through the interior is heated, a hot water storage part that stores the heated hot water and supplies it to the necessary location, an endothermic forward pipe that connects the endothermic part and the hot water storage part, and an endothermic return pipe An endothermic circuit for circulating hot water, an antifreezing sensor for detecting an outside temperature or a temperature close to the outside temperature on the endothermic part side, a hot water temperature sensor for detecting the temperature of the circulating hot water provided in the endothermic circuit, Freezing that performs anti-freezing operation in which the endothermic circulation pump is driven for a predetermined time when the anti-freezing sensor detects a temperature lower than a predetermined temperature, and the endothermic circulation pump is driven again for a predetermined time until the anti-freezing sensor detects a temperature exceeding the predetermined temperature. The freezing control means includes an endothermic circuit that the hot water temperature sensor detects after the antifreezing sensor detects that the temperature is below a predetermined temperature and drives the endothermic circulation pump for a predetermined time. When the temperature of the circulating hot water is equal to or higher than the predetermined temperature, set the drive time and stop time of the endothermic circulation pump, drive the endothermic circulation pump for the set drive time, then stop for the set stop time, and the stop time An anti-freezing device for an endothermic circuit, wherein the anti-freezing operation returns to the anti-freezing operation at a temperature detected by the anti-freezing sensor when the time has elapsed.

An endothermic part where the hot water passing through the inside is heated, and the heated hot water A hot water storage section for supplying hot water to the station, an endothermic forward pipe and an endothermic return pipe communicating with the endothermic section and the hot water storage section, and an endothermic circuit for circulating hot water with an endothermic circulation pump; Freezing prevention sensor that detects a temperature close to the outside air temperature, a hot water temperature sensor that detects the temperature of circulating hot water provided in the heat absorption circuit, and when the antifreezing sensor detects a temperature lower than a predetermined temperature, drives the endothermic circulation pump for a predetermined time. And a freeze control means for performing anti-freezing operation for driving the endothermic circulation pump again for a predetermined time until the anti-freezing sensor detects a temperature exceeding the predetermined temperature, and during the anti-freezing operation, the hot water storage section The high temperature water in the upper part is circulated through the heat absorption circuit, and the heat absorption circuit is switched so that the low temperature hot water is returned to the lower part of the hot water storage unit. After driving the ring pump for a predetermined time, when the temperature of circulating hot water in the endothermic circuit detected by the hot water temperature sensor is higher than the predetermined temperature, set the driving time and stop time of the endothermic circulation pump, and set the endothermic circulation pump An anti-freezing device for an endothermic circuit, which is driven for a driving time and then stops for a set stop time, and returns to the anti-freezing operation at a temperature detected by the anti-freezing sensor when the stop time elapses.

An endothermic circulation pump consisting of an endothermic part that heats hot water passing through the interior, a hot water storage part that stores the heated hot water and supplies it to the required location, an endothermic forward pipe that connects the endothermic part and the hot water storage part, and an endothermic return pipe An endothermic circuit for circulating hot water, an antifreezing sensor for detecting an outside temperature or a temperature close to the outside temperature on the endothermic part side, a hot water temperature sensor for detecting the temperature of the circulating hot water provided in the endothermic circuit, Freezing that performs anti-freezing operation in which the endothermic circulation pump is driven for a predetermined time when the anti-freezing sensor detects a temperature lower than a predetermined temperature, and the endothermic circulation pump is driven again for a predetermined time until the anti-freezing sensor detects a temperature exceeding the predetermined temperature. The freezing control means includes an endothermic circuit that the hot water temperature sensor detects after the antifreezing sensor detects that the temperature is below a predetermined temperature and drives the endothermic circulation pump for a predetermined time. When the temperature of the circulating hot water is equal to or higher than the predetermined temperature, the driving time is determined according to the temperature of the circulating hot water and the endothermic circulation pump is driven, and then the predetermined time is stopped and the stopping time has elapsed. The anti-freezing device for the heat absorption circuit is characterized by returning to the anti-freezing operation at a temperature detected by the anti-freezing sensor.

An endothermic circulation pump consisting of an endothermic part where the hot water passing through the interior is heated, a hot water storage part that stores the heated hot water and supplies it to the necessary location, an endothermic forward pipe that connects the endothermic part and the hot water storage part, and an endothermic return pipe An endothermic circuit for circulating hot water, an antifreezing sensor for detecting an outside temperature or a temperature close to the outside temperature on the endothermic part side, a hot water temperature sensor for detecting the temperature of the circulating hot water provided in the endothermic circuit, Freezing that performs anti-freezing operation in which the endothermic circulation pump is driven for a predetermined time when the anti-freezing sensor detects a temperature lower than a predetermined temperature, and the endothermic circulation pump is driven again for a predetermined time until the anti-freezing sensor detects a temperature exceeding the predetermined temperature. And a control means, during the freeze prevention operation, the high temperature water at the upper part of the hot water storage section is circulated to the heat absorption circuit, and the heat absorption circuit is switched so that the low temperature hot water is returned to the lower part of the hot water storage section. When the temperature of the circulating hot water in the heat absorption circuit detected by the hot water temperature sensor is equal to or higher than the predetermined temperature after the anti-freezing sensor detects the temperature below the predetermined temperature and drives the heat absorption circulation pump for a predetermined time, the freezing control means The driving time is determined according to the temperature of the hot water, the endothermic circulation pump is driven, and then the stop time, which is a predetermined time, is stopped. When the stop time has elapsed, the operation returns to the freeze prevention operation based on the temperature detected by the freeze prevention sensor. An antifreezing device for a heat absorption circuit.

An endothermic circulation pump consisting of an endothermic part that heats hot water passing through the interior, a hot water storage part that stores the heated hot water and supplies it to the required location, an endothermic forward pipe that connects the endothermic part and the hot water storage part, and an endothermic return pipe An endothermic circuit for circulating hot water, an antifreezing sensor for detecting an outside temperature or a temperature close to the outside temperature on the endothermic part side, a hot water temperature sensor for detecting the temperature of the circulating hot water provided in the endothermic circuit, Freezing that performs anti-freezing operation in which the endothermic circulation pump is driven for a predetermined time when the anti-freezing sensor detects a temperature lower than a predetermined temperature, and the endothermic circulation pump is driven again for a predetermined time until the anti-freezing sensor detects a temperature exceeding the predetermined temperature. The freezing control means includes an endothermic circuit that the hot water temperature sensor detects after the antifreezing sensor detects that the temperature is below a predetermined temperature and drives the endothermic circulation pump for a predetermined time. When the temperature of the circulating hot water is equal to or higher than the predetermined temperature, set the driving time and stop time of the endothermic circulation pump according to the temperature of the circulating hot water, drive the endothermic circulation pump for the set driving time, and then set the stop Stop for a while and the stop time An anti-freezing device for an endothermic circuit, wherein the anti-freezing operation returns to the anti-freezing operation at a temperature detected by the anti-freezing sensor.

An endothermic circulation pump consisting of an endothermic part where the hot water passing through the interior is heated, a hot water storage part that stores the heated hot water and supplies it to the necessary location, an endothermic forward pipe that connects the endothermic part and the hot water storage part, and an endothermic return pipe An endothermic circuit for circulating hot water, an antifreezing sensor for detecting an outside temperature or a temperature close to the outside temperature on the endothermic part side, a hot water temperature sensor for detecting the temperature of the circulating hot water provided in the endothermic circuit, Freezing that performs anti-freezing operation in which the endothermic circulation pump is driven for a predetermined time when the anti-freezing sensor detects a temperature lower than a predetermined temperature, and the endothermic circulation pump is driven again for a predetermined time until the anti-freezing sensor detects a temperature exceeding the predetermined temperature. And a control means, during the freeze prevention operation, the high temperature water at the upper part of the hot water storage section is circulated to the heat absorption circuit, and the heat absorption circuit is switched so that the low temperature hot water is returned to the lower part of the hot water storage section. When the temperature of the circulating hot water in the heat absorption circuit detected by the hot water temperature sensor is equal to or higher than the predetermined temperature after the anti-freezing sensor detects the temperature below the predetermined temperature and drives the heat absorption circulation pump for a predetermined time, the freezing control means Set the drive time and stop time of the endothermic circulation pump according to the temperature of the hot water, drive the drive time set for the endothermic circulation pump, then stop for the set stop time, and when the stop time has passed, freeze prevention sensor The anti-freezing device for the endothermic circuit is characterized by returning to the anti-freezing operation at the temperature detected by the heat sink.