JP3930213B2

JP3930213B2 - Hot water heater

Info

Publication number: JP3930213B2
Application number: JP35340199A
Authority: JP
Inventors: 満永倉; 明洋関矢; 嘉計長濱; 義方内山
Original assignee: Corona Corp
Current assignee: Corona Corp
Priority date: 1999-12-13
Filing date: 1999-12-13
Publication date: 2007-06-13
Anticipated expiration: 2019-12-13
Also published as: JP2001173965A

Description

【０００１】
【発明が属する技術分野】
この発明は、熱交換により加熱した温水を循環ポンプにより循環させて室内等の暖房を行う温水暖房装置に関するものである。
【０００２】
【従来の技術】
従来より、この種の温水暖房装置にとしては、例えば特開平９−３０３７９８号がある。
これには、温水暖房装置内の熱交換器の下流側に設けた温水温度センサの検出値により制御するガス量制御器の出力特性に合わせて循環ポンプの出力を変えて制御する、つまり温水を加熱する加熱器の燃焼量に合わせて循環ポンプの回転数を変化させる制御や、熱交換器の上流側に設けた温水温度センサの検出値により循環ポンプの出力を変えて制御する、つまり加熱前の温水の温度に合わせて循環ポンプの回転数を変化させる温水暖房装置の制御が開示されている。
【０００３】
これにより循環ポンプの出力、つまり回転数が一定のものに比べて、温水暖房装置の運転状態に相応したポンプ出力となって省エネルギー化、静音化を図ることができるものである。
【０００４】
また、特開平１０−１１０９５９号では、温水サーミスタによる検知温度が暖房運転開始時に第１の所定温度以上の時は燃焼部の着火後弱燃焼とし、更に所定時間毎に検知された水温が第１の所定温度より高くかつ第２の所定温度以下の時は、燃焼量を段階的に上昇させる温水暖房装置の制御が開示されている。
【０００５】
これにより、暖房運転開始時に強燃焼で燃焼を開始し、温水の温度が上昇するにつれて燃焼量を段階的に低くする制御に比べて、強燃焼では温水の温度が急上昇するような暖房負荷が小さい場合でも、燃焼開始時に温水の温度が急上昇するのを抑えて水温を徐々に上昇させるので、燃焼の停止、再燃焼の繰り返し回数を少なくでき、それにより機器へのストレスが減って寿命が短くなるのを防止できるものである。
【０００６】
ところでこの従来のものでは、例えば特開平９−３０３７９８号の温水暖房装置の場合、暖房負荷が小さいと暖房開始による燃焼で温水の温度が短時間に急上昇し、着火後すぐに燃焼停止されるので、燃焼の停止・再燃焼の繰り返しが多く、温水暖房装置の寿命を短くしてしまうという問題点があった。
【０００７】
また、特開平１０−１１０９５９号の温水暖房装置の場合、暖房負荷が大きくて温水温度が第１の所定温度以上の時、暖房運転開始時つまり着火完了後弱燃焼となるので温水の温度がなかなか上昇せず、又循環ポンプの回転数を変化させて制御を行うものになっていないので、暖房運転開始からの暖房の立ち上がりが遅く、循環ポンプの運転の省エネルギ化もなされていないという問題点があった。
【０００８】
そこで本出願人は上記のような課題を解決するために、循環ポンプ強運転で温水検知温度が温水設定温度の前後の温度帯の時燃焼量比例制御し、該温度帯未満では最大燃焼一定、該温度帯を越えて燃焼停止温度までは最小燃焼一定の第１温調制御パターンと、循環ポンプ弱運転で燃焼停止後再燃焼温度までは燃焼停止、再燃焼温度に低下した時中燃焼で再燃焼すると共に再燃焼温度の前後の温度帯で燃焼量比例制御し、該温度帯未満では最大燃焼一定、該温度帯を越えて燃焼停止温度までは最小燃焼一定の第２温調制御パターンとを切り替えて暖房運転制御を行う温水暖房装置を特願平１１−２９８５６４号として先に出願した。
【０００９】
【発明が解決しようとする課題】
ところでこの先に出願したものでは、熱負荷が小さくて第２温調制御パターンでも温水の検知温度が上昇して燃焼オフ温度まで達する場合、第２温調制御パターンに基づいて燃焼の停止・再燃焼の繰り返しを行うが、再燃焼を繰り返す度に中燃焼から再燃焼が開始され、中燃焼から燃焼量比例制御により燃焼量を最小燃焼まで変化させるとき、燃焼用空気量も変化するので、燃焼音及び燃焼用空気を送風する送風機の回転音が変化し、その燃焼音及び送風機の回転音の変化が暖房負荷が小さい時の騒音の一つとして発生していた。
【００１０】
又第２温調制御パターンに基づいて再燃焼を繰り返すので、再燃焼時に暖房負荷が小さくて燃焼量として中燃焼が必要ではない場合でも中燃焼から再燃焼が開始され、その分燃料が余計に消費されてしまうという課題があった。
【００１１】
そこで本発明は上記のような課題を解決するためになされたもので、暖房負荷の大小にかかわらず快適な暖房運転を行いつつ、燃焼の停止・再燃焼の繰り返しを少なくして温水暖房装置の機器の寿命が短くなるのを防止すると共に、循環ポンプの回転数を制御して変化させることにより循環ポンプの運転の消費電力を低減して省エネルギ化、静音化を図り、更に暖房負荷が小さい場合の再燃焼時の更なる静音化及び燃料の消費を抑えて省エネルギ化を図ることを目的としているものである。
【００１２】
【課題を解決するための手段】
本発明はこの点に着目し上記欠点を解決するため、特にその構成を、請求項１では、水を加熱する熱交換器と、該熱交換器を加熱するバーナ部と、温水の温度を検知する温水サーミスタと、温水の温度を設定する温水温度設定手段と、加熱された温水を搬送する循環ポンプとを備え、室内に備えた放熱器との間に温水循環路を形成し、加熱した温水を出力が可変する循環ポンプにより温水循環路を循環させる温水暖房装置に於いて、前記温水暖房装置の暖房運転は第１温調制御パターンと第２温調制御パターンと第３温調制御パターンとにより制御され、前記第１温調制御パターンは循環ポンプは強運転で温水の設定温度を含む温度帯に温水の検知温度が達したら燃焼量比例制御を行い、温水の検知温度が上がって燃焼オフ温度に達したら燃焼停止して温調制御パターンが第２温調制御パターンに切り替わり、前記第２温調制御パターンは循環ポンプは弱運転で温水の検知温度が燃焼オフ温度に達して燃焼停止した後温水の検知温度が下がって燃焼オン温度に達した時中燃焼で再燃焼し、燃焼オン温度を含む温度帯に温水の検知温度がある間は燃焼量比例制御を行い、更に温水の検知温度が下がってパターン切替温度に達した時温調制御パターンが第１温調制御パターンに切り替わると共に、温水の検知温度が上昇して燃焼オフ温度に達したら第３温調制御パターンに切り替わり、前記第３温調制御パターンは循環ポンプは弱運転で温水の検知温度が燃焼オフ温度に達して燃焼停止した後温水の検知温度が下がって燃焼オン温度に達した時最小燃焼で再燃焼すると共に、再燃焼後温水の検知温度が上がる場合は最小燃焼一定で、再燃焼後温水の検知温度が上がらない場合は中燃焼まで燃焼量を増加して温調制御パターンが第２温調制御パターンに切り替わるものである。
【００１３】
又本発明の請求項２に係る温水暖房装置では、特にその構成を、水を加熱する熱交換器と、該熱交換器を加熱するバーナ部と、温水の温度を検知する温水サーミスタと、温水の温度を設定する温水温度設定手段と、加熱された温水を搬送する循環ポンプとを備え、室内に備えた放熱器との間に温水循環路を形成し、加熱した温水を出力が可変する循環ポンプにより温水循環路を循環させる温水暖房装置で、前記温水暖房装置の暖房運転は第１温調制御パターンと第２温調制御パターンと第３温調制御パターンとにより制御され、前記第１温調制御パターンは循環ポンプは強運転で温水の設定温度を含む温度帯に温水の検知温度が達したら燃焼量比例制御を行い、温水の検知温度が上がって燃焼オフ温度に達したら燃焼停止して温調制御パターンが切り替わり、前記第２温調制御パターンは循環ポンプは弱運転で温水の検知温度が燃焼オフ温度に達して燃焼停止した後温水の検知温度が下がって燃焼オン温度に達した時中燃焼で再燃焼すると共に、燃焼オン温度を含む温度帯に温水の検知温度がある間は燃焼量比例制御を行い、更に温水の検知温度が下がってパターン切替温度に達した時温調制御パターンが切り替わり、前記第３温調制御パターンは循環ポンプは弱運転で温水の検知温度が燃焼オフ温度に達して燃焼停止した後温水の検知温度が下がって燃焼オン温度に達した時最小燃焼で再燃焼すると共に、再燃焼後温水の検知温度が上がる場合は最小燃焼一定で、再燃焼後温水の検知温度が上がらない場合は中燃焼まで燃焼量を増加して温調制御パターンが切り替わる温水暖房装置に於いて、前記第１温調制御パターンは、温水の検知温度が第１比例下限温度より低い時は最大燃焼一定で、温水の設定温度を含む第１比例下限温度から第１比例上限温度までは燃焼量比例制御を行い、第１比例上限温度より高く燃焼オフ温度までは最小燃焼一定の燃焼量制御を行い、前記第２温調制御パターンは、第１温調制御パターンにおいて温水の検知温度が燃焼オフ温度に達して燃焼停止した時切り替わり、燃焼オフ温度から燃焼オン温度までは燃焼停止し、燃焼オン温度を含む第２比例上限温度から第２比例下限温度までは燃焼量比例制御を行い、第２比例下限温度より低くパターン切替温度までは最大燃焼一定で、パターン切替温度まで下がった時第１温調制御パターンに切り替わり、第２比例上限温度より高く燃焼オフ温度までは最小燃焼一定の燃焼量制御を行い、前記第３温調制御パターンは、第２温調制御パターンにおいて温水の検知温度が燃焼オフ温度に達して燃焼停止した時切り替わり、燃焼オフ温度から燃焼オン温度までは燃焼停止し、燃焼オン温度まで下がった時最小燃焼で再燃焼を行い、再燃焼後温水の検知温度が上がる場合は燃焼オフ温度まで最小燃焼一定で再燃焼後温水の検知温度が上がらない場合は、中燃焼まで燃焼量を増加させて第２温調制御パターンに切り替わるものである。
【００１４】
【発明の実施の形態】
前記構成による請求項１に記載の温水暖房装置によれば、第１温調制御パターンでは、循環ポンプは強運転一定であるので室内の放熱器による放熱量を多くして室内の暖房の立ち上がりを早めることができ、しかも温水の検知温度が設定温度の前後の温度になると燃焼量を温水検知温度に対して比例制御するので、設定温度付近に温水温度を制御して燃焼の停止・再燃焼の繰り返し回数を低減して機器の寿命が短くなるのを防止できるものである。
【００１５】
また、第２温調制御パターンでは、パターン切替前の第１温調制御パターンにより温水の温度が上昇して温水の温度が燃焼オフ温度に達するほど室内の温度は上昇して熱負荷としては小さくなっているので、循環ポンプを弱運転一定とすることにより循環ポンプの消費電力を抑えて省エネ運転できると共に、室内の放熱器による放熱量を少なくして室内の温度が高くなり過ぎるのを防止し、又温水の温度が燃焼オン温度まで低下した時中燃焼で再燃焼すると共に、燃焼オン温度を含む温度帯に温水の検知温度がある間は燃焼量比例制御を行うので、再燃焼開始時には熱負荷が大きくて中燃焼では燃焼量が小さく温水温度が更に低下すれば、それに比例して燃焼量を増加させて室内の放熱器による放熱量を大きくし、逆に再燃焼開始時に熱負荷が小さくて中燃焼では燃焼量が大きく温水温度が上昇すれば、それに比例して燃焼量を減少させて室内の放熱器による放熱量を中燃焼時よりも小さくし、それにより室内の放熱器による放熱量を再燃焼前より若干大きい程度にして室内の温度が上昇するのを防止でき、快適な暖房ができるものである。
【００１６】
また、第３温調制御パターンでは、パターン切替前の第２温調制御パターンでも温水の温度が上昇して温水の温度が燃焼オフ温度に達するほど熱負荷としては更に小さくなっているので、再燃焼時には循環ポンプは第２温調制御パターンと同じように弱運転一定とすることにより循環ポンプの消費電力を抑えて省エネ運転できると共に、室内の放熱器による放熱量を最も少なくして室内の温度が高くなるのを防止し、又温水の温度が燃焼オン温度まで低下した時最小燃焼で再燃焼するので、再燃焼開始時には熱負荷が大きくて最小燃焼では燃焼量が小さく温水温度が更に低下すれば、燃焼量を中燃焼に増加させて室内の放熱器による放熱量を大きくし、逆に再燃焼開始時に熱負荷が小さくて最小燃焼でも燃焼量が大きく温水温度が上昇すれば、燃焼量を最小燃焼のままにして室内の放熱器による放熱量を最も小さくして室内の温度が上昇するのを防止でき、又最小燃焼で再燃焼を開始するので、再燃焼開始後にそれ以上燃焼量が小さくならず、最小燃焼一定なので、再燃焼開始時の燃焼音や送風機の回転音が最も小さく、また燃焼量が小さくなっていく燃焼量変化に伴う燃焼音や送風機の回転音の変化がなく、暖房負荷が小さい場合の更なる静音化及び燃料の消費を抑えて省エネルギ化を図ることができるものである。
【００１７】
【実施例】
次に、この発明に係る温水暖房装置を図面に示された一実施例で説明する。
図１において、１は本実施例における温水暖房装置本体で、該温水暖房装置本体１で熱交換して加熱した温水を、往き管２から床暖房パネルやパネルヒータ等の放熱器３を通過させて放熱した後、戻り管４から温水暖房装置本体１に戻す温水循環路５を形成するものである。
【００１８】
前記温水暖房装置本体１は、燃焼用空気を送風する送風機６と、燃油を常に一定量貯めている定油面器７と、該定油面器７の燃油を供給する燃料ポンプ８と、送風された燃焼用空気と供給された燃油とにより燃焼を行うバーナ部９と、循環する温水を貯湯する缶体１０と、前記缶体１０内に設けられ、缶体１０内の温水の温度を検知する温水サーミスタ１１と、前記缶体１０内に設けられ、前記バーナ部９の燃焼により加熱されて缶体１０内の温水と熱交換を行う熱交換器１２と、前記缶体１０内の温水を温水循環路５に循環させる出力可変の循環ポンプ１３と、該循環ポンプ１３と缶体１０との間に設けられ、温水中の空気を温水と分離する気水分離器１４とが内蔵されているものである。
【００１９】
そして温水暖房装置本体１に設けられた操作部１５又は室内等に設置されたリモコン１６により、暖房運転の開始又は停止の操作がされると、操作部１５又はリモコン１６より信号線１７を介して温水暖房装置本体１内の制御部１８に、暖房運転の開始信号又は停止信号が出力され、それにしたがって温水暖房装置の暖房運転を制御するものである。
【００２０】
前記温水暖房装置本体１内の制御部１８は電子回路により構成され、図２に示すようにマイコン１９と、操作部１５又はリモコン１６を操作することにより設定された温水の設定温度Ｔ及びその設定温度Ｔに基づいて演算されて設定される各制御温度を記憶するメモリ２０と、該メモリ２０に記憶されている温水の設定温度Ｔ及び各制御温度と缶体１０の温水サーミスタ１１の検知温度ｔとを比較する比較回路２１と、循環ポンプ１３の出力を可変制御するポンプ駆動回路２２とを具備したもので、温水暖房装置の運転を制御するものである。
【００２１】
次に本実施例の温水暖房装置の作動を図３のフローチャート及び図４に従って説明する。
まず温水暖房装置本体１の制御部１８は、温水暖房装置本体１の操作部１５又はリモコン１６を操作して温水の設定温度Ｔが設定され直されると（Ｓ１）、予め設定されている演算式に基づいて第１比例下限温度Ｔ１、第１比例上限温度Ｔ２、燃焼オフ温度Ｔ３、燃焼オン温度Ｔ４、第２比例下限温度Ｔ５、第２比例上限温度Ｔ６、パターン切替温度Ｔ７の各制御温度を設定する。（Ｓ２）
【００２２】
本実施例では、温水の設定温度Ｔは３０〜８０℃の間で設定することができ、第１比例下限温度Ｔ１＝（Ｔ−３）℃、第１比例上限温度Ｔ２＝（Ｔ＋１）℃、燃焼オフ温度Ｔ３＝（Ｔ＋５）℃、燃焼オン温度Ｔ４＝（Ｔ−５）℃、第２比例下限温度Ｔ５＝（Ｔ−７）℃、第２比例上限温度Ｔ６＝（Ｔ−４）℃、パターン切替温度Ｔ７＝（Ｔ−１０℃という演算式に基づいて上記各制御温度が設定されるものである。
【００２３】
ここで第１比例下限温度Ｔ１から第１比例上限温度Ｔ２までの温度幅を大きくして、温水温度の設定温度付近での燃焼量制御を細かくして設定温度付近に温水温度が保持されやすくし、第２比例下限温度Ｔ５から第２比例上限温度Ｔ６までの温度幅を小さくして、再燃焼後のわずかな温水温度の変化に対して燃焼量を可変させて燃焼停止後の熱負荷の変化に燃焼量を素早く対応させるものである。
【００２４】
そして、温水暖房装置本体１の操作部１５又はリモコン１６を操作して暖房運転を開始すると（Ｓ３）、操作部１５又はリモコン１６から温水暖房装置本体１内の制御部１８に暖房運転の開始信号が出力され、それにより制御部１８は図４の実線で示されている暖房を優先して循環ポンプ１３を強運転に設定する第１温調制御パターンＡに従って（Ｓ４）、バーナ部９で最大燃焼を開始すると共に、循環ポンプ１３を強運転で暖房運転を開始する。（Ｓ５）
【００２５】
上記のように最大燃焼で循環ポンプ１３強運転で暖房運転を開始し、それにより温水サーミスタ１１により検知される缶体１０内の温水検知温度ｔが上昇して第１比例下限温度Ｔ１に達すると（Ｓ６）、図４に示されているようにバーナ部９での燃焼はそれまでの最大燃焼一定ａから燃焼量比例制御ｂになり、温水を設定温度に維持するよう燃焼量を細かく制御する。（Ｓ７）
そして温水検知温度ｔが第１比例下限温度Ｔ１より高くなるのに対応して燃焼量は徐々に小さくなり、第１比例上限温度Ｔ２に温水検知温度ｔが達した時（Ｓ８）、燃焼量は最小となる。（Ｓ９）
【００２６】
そして温水検知温度ｔが更に上昇して第１比例上限温度Ｔ２より高くなると、図４のｃのように温水検知温度ｔが燃焼オフ温度Ｔ３に達するまで最小燃焼一定で循環ポンプ１３強運転の状態で暖房運転が行われる。
【００２７】
そして温水検知温度ｔが燃焼オフ温度Ｔ３に達すると（Ｓ１０）、制御部１８は暖房を優先して循環ポンプ１３を強運転に設定する第１温調制御パターンＡから、燃焼の停止・再燃焼の繰り返しを減らし循環ポンプ１３の省エネ、静音化運転を優先して循環ポンプ１３を弱運転に設定する図４の破線で示されている第２温調制御パターンＢに温調制御パターンを切り換え（Ｓ１１）、それに従って図４のｄのようにバーナ部９の燃焼を停止すると共に、循環ポンプ１３を強運転から弱運転に切り替えて暖房運転を行う。（Ｓ１２）
【００２８】
そしてバーナ部９の燃焼が停止した状態で温水を循環させて放熱器３で放熱させることにより、温水は燃焼オフ温度Ｔ３よりも徐々に低くなっていく。
そして温水検知温度ｔが燃焼オン温度Ｔ４まで低下すると（Ｓ１３）、制御部１８は循環ポンプ１３弱運転のままバーナ部９を中燃焼で再燃焼させる。（Ｓ１４）
【００２９】
中燃焼で再燃焼が開始されると、燃焼量はその時点で図４に示されているように燃焼量比例制御ｅされ（Ｓ１５）、再燃焼開始後、温水検知温度ｔが第２比例上限温度Ｔ６以下で（Ｓ１６）更に第２比例下限温度Ｔ５より大きければ燃焼量比例制御ｅを継続し、再燃焼開始後、温水検知温度ｔが第２比例上限温度Ｔ６以下で（Ｓ１６）更に第２比例下限温度Ｔ５よりより低くなると（Ｓ１７）、図４のｇのように温水検知温度ｔがパターン切替温度Ｔ７に達するまで、最大燃焼一定で循環ポンプ１３弱運転の状態で暖房運転が行われる。（Ｓ１８）
【００３０】
そしてついに温水検知温度ｔがパターン切替温度Ｔ７にまで低下すると（Ｓ１９）、制御部１８は温調制御パターンを第２温調制御パターンＢから第１温調制御パターンＡに切り換え（Ｓ２０）、バーナ部９の燃焼を最大燃焼のままで循環ポンプ１３を弱運転から強運転に切り替えて暖房運転を行うものである。（Ｓ５）
【００３１】
また、再燃焼開始後、温水検知温度ｔが燃焼オン温度Ｔ４より上昇するとそれに対応して燃焼量も中燃焼から徐々に小さくなり、温水検知温度ｔが第２比例上限温度Ｔ６に達した時、燃焼量は最小となる。
【００３２】
そして温水検知温度ｔが更に上昇して第２比例上限温度Ｔ６より高くなると（Ｓ１６）、図４のｆのように温水検知温度ｔが燃焼オフ温度Ｔ３に達するまで、最小燃焼一定で循環ポンプ１３を弱運転とした状態で暖房運転が行われる。（Ｓ２１）
【００３３】
そして温水検知温度ｔが燃焼オフ温度Ｔ３に達すると（Ｓ２２）、制御部１８は燃焼の停止・再燃焼の繰り返しを減らし循環ポンプ１３の省エネ、静音化運転を優先して循環ポンプ１３を弱運転に設定する第２温調制御パターンＢから、循環ポンプ１３の省エネ、静音化運転を優先して循環ポンプ１３を弱運転に設定しつつ、燃焼の停止・再燃焼の繰り返しを減らし、更に再燃焼時の燃料消費を最小限に抑えると共に、再燃焼時に温水暖房装置から発生する音を極力抑えて騒音の極めて小さくした図４の一点鎖線で示されている第３温調制御パターンＣに温調制御パターンを切り換える。（Ｓ２３）
【００３４】
それに従って図４のｈのように循環ポンプ１３を弱運転のままバーナ部９の燃焼を停止して暖房運転を行う。（Ｓ２４）
【００３５】
そしてバーナ部９の燃焼が停止した状態で温水を循環させて放熱器３で放熱させることにより、温水は燃焼オフ温度Ｔ３よりも徐々に低くなっていく。
そして温水検知温度ｔが燃焼オン温度Ｔ４まで低下すると（Ｓ２５）、制御部１８は循環ポンプ１３弱運転のまま図４のｉのようにバーナ部９を最小燃焼で再燃焼させる。（Ｓ２６）
【００３６】
最小燃焼で再燃焼開始後、温水検知温度ｔが燃焼オン温度Ｔ４以上ならば（Ｓ２７）、図４のｊのように温水検知温度ｔが燃焼オフ温度Ｔ３に達するまで、最小燃焼一定で循環ポンプ１３を弱運転とした状態で暖房運転が行われ（Ｓ２８）、その状態で温水検知温度ｔが燃焼オフ温度Ｔ３に達すると（Ｓ２９）、循環ポンプ１３を弱運転のままバーナ部９の燃焼を停止して暖房運転を行い（Ｓ２４）、その後温水検知温度ｔが燃焼オン温度Ｔ４まで低下すると（Ｓ２５）、制御部１８は再び第３温調制御パターンＣに基づいて循環ポンプ１３弱運転のまま図４のｉのようにバーナ部９を最小燃焼で再燃焼させるものである。（Ｓ２６）
【００３７】
また、再燃焼開始後、温水検知温度ｔが燃焼オン温度Ｔ４以上にならないと（Ｓ２７）、制御部１８はそれに対応して燃焼量を最小燃焼から中燃焼に大きくし（Ｓ３０）、温調制御パターンを第３温調制御パターンＣから第２温調制御パターンＢに切り換え（Ｓ３１）、燃焼量はその時点で燃焼量比例制御ｅされて暖房運転を行うものである。（Ｓ１５）
【００３８】
上記のように暖房運転時に燃焼量と循環ポンプ１３の回転数を、暖房優先の第１温調制御パターンと、燃焼の停止・再燃焼の繰り返しを減らし循環ポンプ１３の省エネ、静音化運転を優先する第２温調制御パターンと、燃焼の停止・再燃焼の繰り返しを減らし循環ポンプ１３の省エネ、静音化運転を優先し、更に再燃焼時の燃料消費の最小限化と再燃焼時の静音化を徹底した第３温調制御パターンＣとの３つの温調制御パターンを切り替えて制御することにより、暖房運転開始時のように温水温度及び室温が低い場合は、暖房優先の第１温調制御パターンに従って温水の温度を素早く上げるために最大燃焼で暖房運転を開始すると共に、暖房をする室内の温度を素早く上げるために循環ポンプ１３を強運転で暖房運転を開始させて、暖房運転開始時から放熱器３からの放熱量を最大にして暖房の立ち上がりを早めることができるものである。
【００３９】
更に暖房運転開始後、温水温度が設定温度Ｔに近づくと、暖房優先の第１温調制御パターンではバーナ部９の燃焼を燃焼量比例制御とすることで、温水温度が設定温度Ｔからはずれないように燃焼量制御され、それにより温水温度の上下動変化を抑えて燃焼の停止・再燃焼の繰り返し回数を抑え、機器の寿命が短くなるのを防止できるものである。
【００４０】
また、暖房運転を開始してから温水温度が燃焼オフ温度Ｔ３に達して燃焼停止した後、温水温度が燃焼オン温度Ｔ４まで低下して再燃焼する時、燃焼の停止・再燃焼の繰り返しを減らし循環ポンプ１３の省エネ運転を優先する第２温調制御パターンに従って、燃焼量比例制御にて中燃焼で再燃焼を開始するので、再燃焼開始後温水温度が燃焼オン温度Ｔ４より高くなればそれに対応して燃焼量を徐々に小さくして再燃焼により温水温度が急上昇してすぐ燃焼が停止するのを防止でき、逆に燃焼オン温度Ｔ４より低くなればそれに対応して燃焼量を徐々に大きくして温水温度が更に低くならないようにすることができるものである。
【００４１】
更に暖房運転開始時のように、放熱器３で大きな放熱量が必要なときは、暖房優先の第１温調制御パターンにより循環ポンプ１３を強運転に制御することで、放熱量を大きくして室内の暖房の立ち上がりを素早くし、暖房運転開始後温水温度が上昇して燃焼停止した後に再燃焼する時は、暖房運転開始時のような大きな放熱量が不要の場合が多いので、燃焼の停止・再燃焼の繰り返しを減らし循環ポンプ１３の省エネ、静音化運転を優先する第２温調制御パターンにより再燃焼時には循環ポンプ１３を弱運転に制御することで、放熱量を抑えて室温を今の温度に維持して快適な暖房を行えると共に、循環ポンプ１３の消費電力を抑えて省エネルギ運転を行え、また循環ポンプ１３の動作音を抑えて静音化できるものである。
【００４２】
更に第２温調制御パターンにより暖房運転制御を行っても温水温度が上昇して燃焼停止した時は、放熱器３による必要な放熱量が極めて小さくてよい場合が多いので、循環ポンプ１３の省エネ、静音化運転を優先して循環ポンプ１３を弱運転に設定しつつ、より燃焼の停止・再燃焼の繰り返しを減らし、更に再燃焼時の燃料消費の最小限化と再燃焼時の静音化を徹底した第３温調制御パターンにより、再燃焼時には循環ポンプ１３を弱運転のまま制御し、更に燃焼量を最小燃焼で再燃焼を開始するので、より放熱量を抑えて室温を今の温度に維持して快適な暖房を行えると共に、循環ポンプ１３の消費電力を抑えて省エネルギ運転を行え、また循環ポンプ１３の動作音を抑えて静音化でき、更に再燃焼時の燃料消費を最小限に抑えると共に、再燃焼時に温水暖房装置から発生する音を極力抑えて騒音の極めて小さくできるものである。
【００４３】
なお、本実施例では第２温調制御パターンでの暖房運転制御にて温水検知温度ｔが燃焼オフ温度Ｔ３にまで上昇して燃焼停止した後、第３温調制御パターンに切り替えているがこれに限定されず、第２温調制御パターンで燃焼の停止・再燃焼を所定回数繰り返した時、第３温調制御パターンに切り替えるようにしてもよく、それにより熱負荷が十分小さい状態であることを確認してから第２温調制御パターンから第３温調制御パターンに切り替えることとなり、第３温調制御パターンに切り替わって最小燃焼で再燃焼した際、温水検知温度ｔが燃焼オン温度Ｔ４以上にならずに温調制御パターンを第３温調制御パターンから再び第２温調制御パターンに切り替えることが少なく、第３温調制御パターンによる暖房運転制御を安定して行うことができるものである。
【００４４】
又本実施例では温水暖房装置本体１が温水を缶体１０内に貯湯し、その缶体１０内の温水を熱交換器１２にて熱交換により加熱し、その加熱された缶体１０内の温水温度を検知する貯湯式のものであったがこれに限定されず、図５のように戻り管４より戻ってきた温水をバーナ部９の燃焼により加熱される熱交換器１２内を通過させて熱交換により加熱し、その加熱された温水を循環ポンプ１３にて往き管２を介して放熱器へと送り出し、温水循環路内の温水の温度変化による温水循環量の変化を、熱交換器１２の上流側に接続されているシスターンタンク２３内の温水の増減で調節する直圧式のものでもよく、又この直圧式の場合、温度サーミスタ１１により温度検知される温水は、温水暖房装置に対して往きの温水でも戻りの温水でもよいものである。
【００４５】
【発明の効果】
以上のようにこの発明によれば、暖房運転開始時のように温水温度及び室温が低い場合は、循環ポンプを強運転に設定し燃焼量を最大で燃焼を開始する暖房優先の第１温調制御パターンに従って暖房運転を行うので暖房の立ち上がりが早く、また暖房運転開始後、温水温度が設定温度付近に達したら暖房優先の第１温調制御パターンでは燃焼量比例制御するので、温水の温度を設定温度付近からはずれないようにして室温の変化を小さくして快適な暖房を行えるものである。
【００４６】
また、暖房運転開始後、温水温度が設定温度を超えて燃焼オフ温度にまで達して燃焼停止した後、温水温度が燃焼オン温度まで低下して再燃焼する場合は、循環ポンプを弱運転に設定し燃焼を燃焼量比例制御にて中燃焼で再燃焼を開始する第２温調制御パターン、つまり燃焼の停止・再燃焼の繰り返しを減らし循環ポンプの省エネ、静音化運転を優先する第２温調制御パターンに従って暖房運転を行うので、暖房負荷が小さくても再燃焼開始後、温水温度が急上昇してすぐ燃焼が停止するのを防止すると共に、温水温度が逆に下がるようならその下がり具合に合わせて素早く燃焼量を大きくして温水温度が更に下がってそれにより室温が下がるのを防止でき、また循環ポンプを弱運転に設定することで循環ポンプの消費電力を抑えて省エネ運転ができ、又暖房運転時の循環ポンプの動作音を抑えて静音化できるものである。
【００４７】
更に前記第２温調制御パターンにより暖房運転制御を行っても温水温度が設定温度を超えて燃焼オフ温度にまで上昇して燃焼停止した後、温水温度が燃焼オン温度まで低下して再燃焼する場合は、循環ポンプを弱運転に設定したまま燃焼を最小燃燃焼で再燃焼を開始する第３温調制御パターン、つまりより燃焼の停止・再燃焼の繰り返しを減らし循環ポンプの省エネ、静音化運転を行いつつ、再燃焼時の燃料消費の最小限化と再燃焼時の静音化を徹底した第３温調制御パターンに従って暖房運転を行うので、暖房負荷が小さくても再燃焼開始後、温水温度が急上昇してすぐ燃焼が停止するのを防止すると共に、温水温度が逆に下がるようなら素早く燃焼量を中燃焼に大きくして第２温調制御パターンに切り替わることにより、温水温度が更に下がってそれにより室温が下がるのを防止でき、また循環ポンプを弱運転に設定することで循環ポンプの消費電力を抑えて省エネ運転ができ、又暖房運転時の循環ポンプの動作音を抑えて静音化でき、更に再燃焼時の燃料消費を最小限に抑えると共に、再燃焼時に温水暖房装置から発生する音を極力抑えて騒音の極めて小さくできるものである。
【図面の簡単な説明】
【図１】この発明の一実施例を付した温水暖房装置の概略構成図。
【図２】同制御部の概略構成図。
【図３】図１の温水暖房装置の作動を説明するためのフローチャート図。
【図４】同燃焼量と温水温度と循環ポンプとの動作特性図。
【図５】この発明の他の実施例を付した温水暖房装置の概略構成図。
【符号の説明】
３放熱器
５温水循環路
９バーナ部
１１温水サーミスタ
１２放熱器
１３循環ポンプ[0001]
[Technical field to which the invention belongs]
The present invention relates to a hot water heating apparatus for heating indoors by circulating hot water heated by heat exchange using a circulation pump.
[0002]
[Prior art]
Conventionally, as this type of hot water heater, for example, there is JP-A-9-303798.
This is achieved by changing the output of the circulation pump according to the output characteristics of the gas amount controller controlled by the detection value of the hot water temperature sensor provided downstream of the heat exchanger in the hot water heating device, that is, the hot water Control to change the rotation speed of the circulation pump in accordance with the combustion amount of the heater to be heated, and control by changing the output of the circulation pump according to the detection value of the hot water temperature sensor provided upstream of the heat exchanger, that is, before heating The control of the hot water heater which changes the rotation speed of the circulation pump in accordance with the temperature of the hot water is disclosed.
[0003]
As a result, compared to the output of the circulation pump, that is, the rotation speed is constant, the pump output corresponds to the operation state of the hot water heater, and energy saving and noise reduction can be achieved.
[0004]
Further, in Japanese Patent Laid-Open No. 10-110959, when the temperature detected by the hot water thermistor is equal to or higher than a first predetermined temperature at the start of heating operation, the combustion portion is ignited weakly after ignition, and the water temperature detected every predetermined time is first. When the temperature is higher than the predetermined temperature and equal to or lower than the second predetermined temperature, the control of the hot water heating apparatus is disclosed in which the combustion amount is increased stepwise.
[0005]
As a result, compared to the control that starts combustion with strong combustion at the start of heating operation and gradually reduces the amount of combustion as the temperature of hot water rises, the heating load at which the temperature of hot water rises sharply with strong combustion is small Even in this case, the water temperature is gradually increased by suppressing the sudden rise in the temperature of the hot water at the start of combustion, so that the number of repeated combustion stops and recombustions can be reduced, thereby reducing the stress on the equipment and shortening the service life. Can be prevented.
[0006]
By the way, in this conventional apparatus, for example, in the case of the hot water heating apparatus disclosed in Japanese Patent Laid-Open No. 9-303798, if the heating load is small, the temperature of the hot water rapidly rises in a short time due to combustion due to the start of heating, and the combustion is stopped immediately after ignition. However, there are many problems that the combustion of the hot water heater is shortened because the combustion is repeatedly stopped and recombusted.
[0007]
Further, in the case of the hot water heating apparatus disclosed in Japanese Patent Laid-Open No. 10-110959, when the heating load is large and the hot water temperature is equal to or higher than the first predetermined temperature, the temperature of the hot water is quite low because the heating operation starts, that is, the combustion is weak after completion of ignition. It does not increase, and since the control is not performed by changing the rotation speed of the circulation pump, the rise of heating from the start of the heating operation is slow, and the energy saving of the operation of the circulation pump has not been made. was there.
[0008]
Therefore, in order to solve the above-mentioned problems, the present applicant controls the combustion amount proportionally when the hot water detection temperature is in the temperature zone before and after the hot water set temperature in the strong operation of the circulation pump, and the maximum combustion is constant below the temperature zone. The first temperature control pattern with the minimum combustion constant until the combustion stop temperature exceeds this temperature range, and the combustion stops after the combustion is stopped by the circulation pump weak operation until the re-combustion temperature, and the combustion is restarted when the temperature decreases to the re-combustion temperature. Combustion and proportional control of the combustion amount in the temperature range before and after the re-combustion temperature, and a second temperature control pattern in which the maximum combustion is constant below the temperature range, and the minimum combustion is constant beyond the temperature range to the combustion stop temperature. Japanese Patent Application No. 11-298564 has previously filed a hot water heating apparatus that performs heating operation control by switching.
[0009]
[Problems to be solved by the invention]
By the way, in the previously filed application, when the thermal load is small and the detected temperature of the hot water rises to the combustion off temperature even in the second temperature control pattern, the combustion is stopped / reburned based on the second temperature control pattern. However, each time re-combustion is repeated, re-combustion is started from middle combustion, and when the combustion amount is changed from the middle combustion to the minimum combustion by the combustion amount proportional control, the combustion air amount also changes. In addition, the rotation sound of the blower that blows the combustion air is changed, and the change in the combustion sound and the rotation sound of the blower is generated as one of noises when the heating load is small.
[0010]
In addition, since the re-combustion is repeated based on the second temperature control pattern, even if the heating load is small at the time of re-combustion and the intermediate combustion is not required as the combustion amount, the re-combustion is started from the intermediate combustion, and the fuel is extra. There was a problem of being consumed.
[0011]
Therefore, the present invention has been made to solve the above-described problems, and it is possible to reduce the repetition of stop and re-combustion of the hot water heater while performing a comfortable heating operation regardless of the size of the heating load. The life of the equipment is prevented from being shortened, and the power consumption of the circulation pump is reduced by controlling and changing the rotation speed of the circulation pump to save energy and silence, and the heating load is small. The purpose is to further reduce noise during reburning and to save energy by suppressing fuel consumption.
[0012]
[Means for Solving the Problems]
The present invention pays attention to this point and solves the above-mentioned drawbacks. In particular, in the present invention, in claim 1, a heat exchanger for heating water, a burner for heating the heat exchanger, and the temperature of hot water are detected. A hot water thermistor, a hot water temperature setting means for setting the temperature of the hot water, and a circulation pump for conveying the heated hot water, and forming a hot water circulation path between the indoor radiator and heating the hot water In the hot water heating apparatus that circulates the hot water circulation path using a circulation pump whose output is variable, the heating operation of the hot water heating apparatus includes a first temperature control pattern, a second temperature control pattern, and a third temperature control pattern. The first temperature control pattern is controlled by the combustion pump proportional control when the temperature of the circulating pump is strong and the detected temperature of the hot water reaches the temperature range including the set temperature of the hot water, and the detected temperature of the hot water rises and the combustion is turned off. Burns when the temperature is reached The temperature control pattern to stop In the second temperature control pattern The second temperature control pattern is switched, and when the circulating pump is weakly operated and the detected temperature of the hot water reaches the combustion off temperature and stops burning, the detected temperature of the hot water decreases and reaches the combustion on temperature. And While the detection temperature of hot water is in the temperature range including the combustion ON temperature, the combustion amount proportional control is performed, and when the detection temperature of the hot water decreases and reaches the pattern switching temperature, the temperature adjustment control pattern is When the temperature is switched to the first temperature control pattern and the detected temperature of the hot water rises and reaches the combustion off temperature, the temperature is switched to the third temperature control pattern. In the third temperature control pattern, the circulating pump is weakly operated, and when the detected temperature of the hot water reaches the combustion off temperature and the combustion is stopped, after the detected temperature of the hot water decreases and reaches the combustion on temperature, the combustion is recombusted with the minimum combustion. If the detected temperature of warm water after re-combustion increases, the minimum combustion is constant.If the detected temperature of warm water does not increase after re-combustion, the amount of combustion is increased until medium combustion, and the temperature control pattern In the second temperature control pattern It will be switched.
[0013]
In the hot water heater according to claim 2 of the present invention, in particular, A heat exchanger for heating water, a burner section for heating the heat exchanger, a hot water thermistor for detecting the temperature of the hot water, a hot water temperature setting means for setting the temperature of the hot water, and a circulation for transporting the heated hot water A hot water heating apparatus that forms a hot water circulation path with a radiator provided in a room and circulates the heated hot water through a hot water circulation path with a variable output pump, and heating the hot water heating apparatus The operation is controlled by a first temperature control pattern, a second temperature control pattern, and a third temperature control pattern, and the first temperature control pattern is set to a temperature range including a set temperature of hot water when the circulation pump is operated strongly. When the detected temperature of the hot water reaches, the combustion amount proportional control is performed. When the detected temperature of the hot water rises and reaches the combustion off temperature, the combustion is stopped and the temperature control pattern is switched. The second temperature control pattern is weak for the circulation pump. luck When the detected temperature of the hot water reaches the combustion off temperature and the combustion is stopped, the detected temperature of the hot water decreases and reaches the combustion on temperature. During the period of time, the combustion amount proportional control is performed, and when the detected temperature of the hot water decreases and the pattern switching temperature is reached, the temperature control control pattern is switched. When the detected temperature of the hot water drops and reaches the combustion on temperature after the temperature reaches the combustion off temperature and the combustion is stopped, the combustion is recombusted with the minimum combustion. In the hot water heating system where the temperature control pattern is switched by increasing the amount of combustion until the middle combustion if the detected temperature of hot water does not rise after re-combustion, In the first temperature control pattern, the maximum combustion is constant when the detected temperature of the hot water is lower than the first proportional lower limit temperature, and the combustion amount is proportional from the first proportional lower limit temperature including the set temperature of the hot water to the first proportional upper limit temperature. The control is performed, and the combustion amount control is performed so that the minimum combustion is constant until the combustion off temperature is higher than the first proportional upper limit temperature. The second temperature control pattern is the detected temperature of the hot water in the first temperature control pattern. The combustion is stopped from the combustion off temperature to the combustion on temperature, the combustion amount is controlled from the second proportional upper limit temperature including the combustion on temperature to the second proportional lower limit temperature, and the second proportional control is performed. The maximum combustion is constant until the pattern switching temperature is lower than the lower limit temperature, and when the temperature falls to the pattern switching temperature, the first temperature control pattern is switched, and the minimum combustion is higher than the second proportional upper temperature and until the combustion off temperature. A constant combustion amount control is performed, and the third temperature control pattern is switched when the detected temperature of the hot water reaches the combustion off temperature and the combustion stops in the second temperature control pattern, and from the combustion off temperature to the combustion on temperature. When combustion stops and the temperature decreases to the combustion on temperature, recombustion is performed with minimum combustion.If the detected temperature of hot water increases after recombustion, the detected temperature of hot water does not increase after recombustion with the minimum combustion constant until the combustion off temperature. The combustion amount is increased until the middle combustion, and the second temperature control pattern is switched.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
According to the hot water heating apparatus of claim 1 having the above-described configuration, in the first temperature control pattern, the circulation pump is strongly operated and constant, so the amount of heat dissipated by the indoor radiator is increased to increase the heating of the room. When the detected temperature of hot water reaches a temperature around the set temperature, the combustion amount is controlled in proportion to the detected temperature of the hot water, so the hot water temperature is controlled near the set temperature to stop combustion and re-combustion. By reducing the number of repetitions, it is possible to prevent the life of the device from being shortened.
[0015]
In the second temperature control pattern, the temperature of the hot water rises by the first temperature control pattern before the pattern switching, and the indoor temperature rises as the temperature of the hot water reaches the combustion off temperature, and the heat load is small. Therefore, by keeping the circulating pump at a low level, the power consumption of the circulating pump can be reduced to save energy and the amount of heat released by the indoor radiator can be reduced to prevent the indoor temperature from becoming too high. In addition, when the temperature of the hot water is reduced to the combustion on temperature, the combustion is recombusted and the combustion amount proportional control is performed while the temperature of the hot water is detected in the temperature range including the combustion on temperature. If the load is large and the combustion amount is small and the hot water temperature further decreases in medium combustion, the combustion amount is increased proportionally to increase the amount of heat released by the indoor radiator. If the combustion amount is large and the hot water temperature rises in small and medium combustion, the combustion amount is reduced in proportion to it, and the heat dissipation by the indoor radiator is made smaller than that during the middle combustion, thereby releasing the radiation by the indoor radiator. The amount of heat can be made slightly larger than before recombustion to prevent the indoor temperature from rising, and comfortable heating can be achieved.
[0016]
In the third temperature control pattern, since the temperature of the hot water rises even in the second temperature control pattern before the pattern switching and the temperature of the hot water reaches the combustion off temperature, the heat load is further reduced. During combustion, the circulation pump can be operated in an energy-saving manner by reducing the power consumption of the circulation pump by keeping the weak operation constant in the same manner as the second temperature control pattern. When the temperature of the hot water drops to the combustion on temperature, recombustion is performed with minimum combustion.Therefore, the heat load is large at the start of recombustion, and the amount of combustion is small and the hot water temperature is further decreased at the minimum combustion. For example, if the amount of combustion is increased to medium combustion and the amount of heat released by the indoor radiator is increased, conversely if the heat load is small at the start of recombustion and the combustion amount is large and the hot water temperature rises even at the minimum combustion The minimum amount of heat released by the indoor radiator can be prevented by keeping the combustion amount at the minimum, and the indoor temperature can be prevented from rising, and recombustion is started with minimum combustion. Since the amount is not reduced and the minimum combustion is constant, the combustion noise at the start of re-combustion and the rotation noise of the blower are the lowest, and the combustion noise and the change in the rotation noise of the blower accompanying the change in the combustion amount as the combustion amount decreases In addition, it is possible to achieve further energy saving by suppressing further noise reduction and fuel consumption when the heating load is small.
[0017]
【Example】
Next, a hot water heater according to the present invention will be described with reference to an embodiment shown in the drawings.
In FIG. 1, reference numeral 1 denotes a hot water heating apparatus main body in the present embodiment. Hot water heated by exchanging heat in the hot water heating apparatus main body 1 is passed through a radiator 3 such as a floor heating panel or a panel heater from an outgoing pipe 2. After the heat is released, the hot water circulation path 5 is formed from the return pipe 4 back to the hot water heating apparatus body 1.
[0018]
The hot water heating apparatus body 1 includes a blower 6 that blows combustion air, a constant oil level device 7 that always stores a certain amount of fuel oil, a fuel pump 8 that supplies fuel oil of the constant oil level device 7, and a blower The burner unit 9 that burns with the combustion air and the supplied fuel oil, the can body 10 that stores hot water that circulates, and the temperature of the hot water in the can body 10 that is provided in the can body 10 is detected. A hot water thermistor 11, a heat exchanger 12 that is provided in the can body 10 and is heated by the combustion of the burner unit 9 to exchange heat with the hot water in the can body 10, and hot water in the can body 10 A variable output circulation pump 13 that circulates in the hot water circulation path 5 and an air / water separator 14 that is provided between the circulation pump 13 and the can 10 and separates the air in the warm water from the warm water are incorporated. Is.
[0019]
Then, when an operation for starting or stopping the heating operation is performed by the operation unit 15 provided in the hot water heating apparatus body 1 or the remote control 16 installed in the room, the operation unit 15 or the remote control 16 via the signal line 17 A heating operation start signal or a stop signal is output to the control unit 18 in the hot water heating apparatus main body 1, and the heating operation of the hot water heating apparatus is controlled accordingly.
[0020]
The controller 18 in the hot water heater main body 1 is constituted by an electronic circuit, and as shown in FIG. 2, the set temperature T of hot water set by operating the microcomputer 19, the operating unit 15 or the remote controller 16 and the setting thereof. A memory 20 that stores each control temperature calculated and set based on the temperature T, a set temperature T of hot water stored in the memory 20, each control temperature, and a detected temperature t of the hot water thermistor 11 of the can 10. And a pump drive circuit 22 that variably controls the output of the circulation pump 13, and controls the operation of the hot water heater.
[0021]
Next, the operation of the hot water heater of this embodiment will be described with reference to the flowchart of FIG. 3 and FIG.
First, when the control unit 18 of the hot water heating apparatus body 1 operates the operation unit 15 or the remote controller 16 of the hot water heating apparatus body 1 to reset the set temperature T of the hot water (S1), a preset arithmetic expression is set. The first proportional lower limit temperature T1, the first proportional upper limit temperature T2, the combustion off temperature T3, the combustion on temperature T4, the second proportional lower limit temperature T5, the second proportional upper limit temperature T6, and the pattern switching temperature T7 are controlled. Set. (S2)
[0022]
In this embodiment, the set temperature T of the hot water can be set between 30 and 80 ° C., the first proportional lower limit temperature T1 = (T−3) ° C., the first proportional upper limit temperature T2 = (T + 1) ° C., Combustion off temperature T3 = (T + 5) ° C., combustion on temperature T4 = (T−5) ° C., second proportional lower limit temperature T5 = (T−7) ° C., second proportional upper limit temperature T6 = (T−4) ° C. Each control temperature is set on the basis of an arithmetic expression of pattern switching temperature T7 = (T−10 ° C.).
[0023]
Here, the temperature range from the first proportional lower limit temperature T1 to the first proportional upper limit temperature T2 is increased to finely control the combustion amount in the vicinity of the set temperature of the hot water temperature so that the hot water temperature is easily maintained near the set temperature. The temperature range from the second proportional lower limit temperature T5 to the second proportional upper limit temperature T6 is reduced, and the amount of combustion is varied in response to a slight change in hot water temperature after recombustion, so that the change in heat load after the combustion stops The amount of combustion is made to correspond quickly.
[0024]
And if the heating part is started by operating the operation part 15 or the remote control 16 of the hot water heating apparatus body 1 (S3), the start signal of the heating operation is sent from the operation part 15 or the remote control 16 to the control part 18 in the hot water heating apparatus body 1. Thus, the control unit 18 gives priority to the heating shown by the solid line in FIG. 4 according to the first temperature control pattern A in which the circulation pump 13 is set to a strong operation (S4), and the burner unit 9 While starting the combustion, the circulating pump 13 is started in a heating operation with a strong operation. (S5)
[0025]
As described above, when the heating operation is started by the strong operation of the circulation pump 13 with the maximum combustion, and the hot water detection temperature t in the can 10 detected by the hot water thermistor 11 thereby rises and reaches the first proportional lower limit temperature T1. (S6) As shown in FIG. 4, the combustion in the burner section 9 is changed from the maximum constant combustion a until the combustion amount proportional control b, and the combustion amount is finely controlled so as to maintain the hot water at the set temperature. . (S7)
The combustion amount gradually decreases in response to the hot water detection temperature t becoming higher than the first proportional lower limit temperature T1, and when the hot water detection temperature t reaches the first proportional upper limit temperature T2 (S8), the combustion amount is Minimal. (S9)
[0026]
When the hot water detection temperature t further rises and becomes higher than the first proportional upper limit temperature T2, as shown in FIG. 4c, the circulating pump 13 is in a strong operation state with the minimum combustion constant until the hot water detection temperature t reaches the combustion off temperature T3. Heating operation is performed at.
[0027]
When the hot water detection temperature t reaches the combustion off temperature T3 (S10), the controller 18 stops combustion / reburns from the first temperature control pattern A in which heating is prioritized and the circulation pump 13 is set to strong operation. The temperature control pattern is switched to the second temperature control pattern B shown by the broken line in FIG. 4 in which the repetition pump is reduced and the circulation pump 13 is set to the weak operation with priority on the energy saving and silent operation of the circulation pump 13 ( In step S11), the combustion of the burner unit 9 is stopped as shown in FIG. 4D, and the heating operation is performed by switching the circulation pump 13 from the strong operation to the weak operation. (S12)
[0028]
Then, when the combustion of the burner unit 9 is stopped, the hot water is circulated and radiated by the radiator 3, so that the hot water gradually becomes lower than the combustion off temperature T3.
When the hot water detection temperature t decreases to the combustion on temperature T4 (S13), the control unit 18 causes the burner unit 9 to re-combust with medium combustion while the circulation pump 13 is weakly operated. (S14)
[0029]
When re-combustion is started in the middle combustion, the combustion amount is controlled in proportion to the combustion amount as shown in FIG. 4 (S15), and after the start of re-combustion, the hot water detection temperature t becomes the second proportional upper limit. If the temperature is equal to or lower than T6 (S16) and is greater than the second proportional lower limit temperature T5, the combustion amount proportional control e is continued. After the start of recombustion, the hot water detection temperature t is equal to or lower than the second proportional upper limit temperature T6 (S16). When the temperature is lower than the proportional lower limit temperature T5 (S17), the heating operation is performed in the state where the maximum combustion is constant and the circulating pump 13 is weakly operated until the hot water detection temperature t reaches the pattern switching temperature T7 as shown in g of FIG. (S18)
[0030]
When the hot water detection temperature t finally decreases to the pattern switching temperature T7 (S19), the controller 18 switches the temperature control pattern from the second temperature control pattern B to the first temperature control pattern A (S20). The heating operation is performed by switching the circulation pump 13 from the weak operation to the strong operation while maintaining the maximum combustion in the combustion of the section 9. (S5)
[0031]
In addition, when the hot water detection temperature t rises from the combustion on temperature T4 after the start of recombustion, the amount of combustion gradually decreases from the middle combustion correspondingly, and when the hot water detection temperature t reaches the second proportional upper limit temperature T6, The amount of combustion is minimized.
[0032]
When the detected hot water temperature t further rises and becomes higher than the second proportional upper limit temperature T6 (S16), as shown in f of FIG. 4, the circulating pump 13 keeps the minimum combustion constant until the hot water detected temperature t reaches the combustion off temperature T3. Heating operation is performed in a state where the operation is weak. (S21)
[0033]
When the hot water detection temperature t reaches the combustion off temperature T3 (S22), the control unit 18 reduces the repetition of the stop and recombustion of combustion, and prioritizes the energy saving and noise reduction operation of the circulation pump 13, and weakly operates the circulation pump 13. From the second temperature control pattern B set to, the circulation pump 13 is set to a weak operation giving priority to energy-saving and silent operation of the circulation pump 13, and the repetition of stop and re-combustion is reduced and further re-combustion is performed. The temperature control is performed in the third temperature control pattern C shown by the one-dot chain line in FIG. 4 that minimizes the fuel consumption at the time and suppresses the sound generated from the hot water heating device at the time of re-combustion as much as possible to minimize the noise. Switch the control pattern. (S23)
[0034]
Accordingly, as shown in h of FIG. 4, the combustion of the burner unit 9 is stopped and the heating operation is performed while the circulation pump 13 is operated weakly. (S24)
[0035]
Then, when the combustion of the burner unit 9 is stopped, the hot water is circulated and radiated by the radiator 3, so that the hot water gradually becomes lower than the combustion off temperature T3.
When the hot water detection temperature t decreases to the combustion on temperature T4 (S25), the control unit 18 reburns the burner unit 9 with minimum combustion as shown in i of FIG. (S26)
[0036]
If the hot water detection temperature t is equal to or higher than the combustion on temperature T4 after the start of recombustion with minimum combustion (S27), the circulation pump is maintained at the minimum combustion until the hot water detection temperature t reaches the combustion off temperature T3 as shown in j of FIG. When the hot water detection temperature t reaches the combustion off temperature T3 in this state (S29), the burner unit 9 is burned with the circulation pump 13 being weakly operated. After stopping and performing the heating operation (S24), and then the hot water detection temperature t decreases to the combustion on temperature T4 (S25), the control unit 18 again operates with the circulation pump 13 weakly based on the third temperature control pattern C. As shown in i of FIG. 4, the burner portion 9 is recombusted with minimum combustion. (S26)
[0037]
If the hot water detection temperature t does not become equal to or higher than the combustion on temperature T4 after the start of recombustion (S27), the control unit 18 correspondingly increases the combustion amount from minimum combustion to medium combustion (S30), and temperature control is performed. The pattern is switched from the third temperature adjustment control pattern C to the second temperature adjustment control pattern B (S31), and the combustion amount is subjected to the combustion amount proportional control e at that time to perform the heating operation. (S15)
[0038]
As described above, priority is given to the amount of combustion and the rotation speed of the circulation pump 13 during heating operation, the first temperature adjustment control pattern prioritizing heating, the repetition of combustion stop / reburn, and the energy saving and silent operation of the circulation pump 13 being prioritized. The second temperature control pattern to be used, the repetition of combustion stop / reburn is reduced, and the energy saving and silent operation of the circulation pump 13 is prioritized, and further, the fuel consumption during reburn is minimized and the noise is reduced during reburn. By switching and controlling the three temperature adjustment control patterns with the third temperature adjustment control pattern C, the first temperature adjustment control prioritizing the heating when the hot water temperature and the room temperature are low as at the start of the heating operation. In order to quickly raise the temperature of the hot water according to the pattern, the heating operation is started with the maximum combustion, and in order to quickly raise the temperature of the room to be heated, the heating operation is started with the circulation pump 13 being strongly operated, thereby heating the operation. It is capable to accelerate the rise of heating in the maximum amount of heat dissipated from the radiator 3 from Hajimeji.
[0039]
Further, when the hot water temperature approaches the set temperature T after the heating operation is started, the hot water temperature does not deviate from the set temperature T by setting the combustion in the burner unit 9 to the combustion amount proportional control in the first temperature control pattern with priority on heating. Thus, the amount of combustion is controlled, thereby suppressing the vertical movement change of the hot water temperature, the number of repetitions of combustion stop and re-combustion, and shortening the life of the equipment.
[0040]
Also, after the hot water temperature reaches the combustion off temperature T3 after the heating operation is started and the combustion is stopped, when the hot water temperature is lowered to the combustion on temperature T4 and the recombustion is performed, the repetition of the stop / reburn of combustion is reduced. In accordance with the second temperature control pattern that prioritizes energy-saving operation of the circulation pump 13, recombustion is started with medium combustion by combustion amount proportional control, so if the hot water temperature becomes higher than the combustion on temperature T4 after the start of recombustion Thus, the combustion amount can be gradually reduced to prevent the combustion from stopping immediately after the hot water temperature suddenly increases due to recombustion. Conversely, if the temperature is lower than the combustion on temperature T4, the combustion amount is gradually increased accordingly. Therefore, the hot water temperature can be prevented from further lowering.
[0041]
Furthermore, when a large amount of heat dissipation is required by the radiator 3 as at the start of heating operation, the heat dissipation amount can be increased by controlling the circulation pump 13 to a strong operation by the first temperature control pattern with priority to heating. When the indoor heating starts quickly and the temperature of the hot water rises after the heating operation starts and then stops burning, a large amount of heat dissipation is not required as when the heating operation is started.・ By reducing the repetition of re-combustion, the second temperature control control pattern that prioritizes energy-saving and quiet operation of the circulation pump 13, controls the circulation pump 13 to a weak operation at the time of re-combustion, thereby reducing the amount of heat and reducing the current room temperature. While maintaining the temperature and performing comfortable heating, the power consumption of the circulation pump 13 can be suppressed, energy saving operation can be performed, and the operation sound of the circulation pump 13 can be suppressed and noise reduction can be achieved.
[0042]
Further, even if the heating operation control is performed by the second temperature control pattern, when the hot water temperature rises and the combustion is stopped, the amount of heat radiation required by the radiator 3 may be very small in many cases. Priority is given to silent operation, setting the circulation pump 13 to weak operation, reducing the repetition of combustion stop and re-combustion, further minimizing fuel consumption during re-combustion and reducing noise during re-combustion. Due to the thorough third temperature control pattern, the recirculation pump 13 is controlled with weak operation at the time of re-combustion, and further, the re-combustion is started with the minimum amount of combustion. It is possible to maintain and perform comfortable heating, to reduce the power consumption of the circulation pump 13 and to save energy, to reduce the operation noise of the circulation pump 13 and to reduce noise, and to minimize fuel consumption during re-combustion. While holding down Those that can be very small noise by minimizing the sound generated from the hot water heating system during combustion.
[0043]
In this embodiment, after the hot water detection temperature t rises to the combustion off temperature T3 and stops combustion in the heating operation control with the second temperature adjustment control pattern, it is switched to the third temperature adjustment control pattern. It is not limited to this, and when the stop / reburning of combustion is repeated a predetermined number of times in the second temperature control pattern, it may be switched to the third temperature control pattern, so that the heat load is sufficiently small. After confirming the above, the second temperature control pattern is switched to the third temperature control pattern, and when switching to the third temperature control pattern and re-combustion with minimum combustion, the hot water detection temperature t is equal to or higher than the combustion on temperature T4. The temperature control pattern is rarely switched from the third temperature control pattern to the second temperature control pattern again, and the heating operation control by the third temperature control pattern is stably performed. It is those that can be.
[0044]
In the present embodiment, the hot water heating apparatus main body 1 stores hot water in the can body 10, the hot water in the can body 10 is heated by heat exchange in the heat exchanger 12, and the heated can body 10 Although it was a hot water storage type that detects the temperature of the hot water, it is not limited to this, and the hot water returned from the return pipe 4 is passed through the heat exchanger 12 heated by the combustion of the burner section 9 as shown in FIG. The heated hot water is heated by heat exchange, and the heated hot water is sent to the radiator via the forward pipe 2 by the circulation pump 13, and the change of the hot water circulation amount due to the temperature change of the hot water in the hot water circulation path is 12 may be a direct pressure type that is adjusted by increasing / decreasing the hot water in the cistern tank 23 connected to the upstream side, and in the case of this direct pressure type, the hot water whose temperature is detected by the temperature thermistor 11 is supplied to the hot water heater. You can go back and forth with warm water It is intended.
[0045]
【The invention's effect】
As described above, according to the present invention, when the hot water temperature and the room temperature are low, such as at the start of the heating operation, the first temperature control with priority to heating is set so that the circulation pump is set to the strong operation and the combustion amount is started at the maximum. Since the heating operation is performed according to the control pattern, the start-up of the heating is quick, and after the heating operation starts, if the temperature of the hot water reaches around the set temperature, the first temperature adjustment control pattern prioritizing the heating controls the combustion amount proportionally. Comfortable heating can be performed by reducing the change in room temperature so as not to deviate from the vicinity of the set temperature.
[0046]
Also, after the heating operation starts, if the hot water temperature exceeds the set temperature and reaches the combustion off temperature to stop combustion, and the hot water temperature falls to the combustion on temperature and recombusts, set the circulation pump to a weak operation The second temperature control pattern that starts re-combustion with medium-combustion with proportional combustion control, that is, the second temperature control that prioritizes energy saving and quiet operation of the circulation pump by reducing the repetition of stop and re-combustion of combustion Since the heating operation is performed according to the control pattern, even if the heating load is small, after the start of re-combustion, the hot water temperature suddenly rises to prevent the combustion from stopping immediately, and if the hot water temperature falls conversely, it will be adjusted to the degree of decline. The combustion volume can be quickly increased to prevent the hot water temperature from dropping further, thereby lowering the room temperature, and by setting the circulation pump to a weak operation, the power consumption of the circulation pump can be reduced to save energy. It can be, also those that can be quieter by suppressing the operation sound of the circulation pump in the heating operation.
[0047]
Further, even if the heating operation control is performed by the second temperature control pattern, after the hot water temperature exceeds the set temperature and rises to the combustion off temperature to stop the combustion, the hot water temperature falls to the combustion on temperature and recombusts. In this case, the third temperature control pattern that starts re-combustion with minimum fuel combustion while the circulation pump is set to weak operation, that is, to reduce the repetition of stop and re-combustion of the circulation pump, to save energy of the circulation pump, and to operate silently Heating operation is performed in accordance with the third temperature control pattern that thoroughly minimizes fuel consumption during reburning and quiets during reburning. If the hot water temperature decreases, the hot water temperature is further increased by increasing the combustion amount to medium combustion and switching to the second temperature control pattern. Therefore, it is possible to prevent the room temperature from decreasing, and by setting the circulation pump to a weak operation, the power consumption of the circulation pump can be reduced to save energy, and the operation sound of the circulation pump during heating operation can be suppressed. The noise can be reduced, the fuel consumption at the time of recombustion can be minimized, and the noise generated from the hot water heating apparatus at the time of recombustion can be suppressed as much as possible to extremely reduce the noise.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a hot water heating apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic configuration diagram of the control unit.
FIG. 3 is a flowchart for explaining the operation of the hot water heating apparatus of FIG. 1;
FIG. 4 is an operation characteristic diagram of the combustion amount, hot water temperature, and circulation pump.
FIG. 5 is a schematic configuration diagram of a hot water heater with another embodiment of the present invention.
[Explanation of symbols]
3 radiators
5 Warm water circuit
9 Burner
11 Hot water thermistor
12 Heatsink
13 Circulation pump

Claims

A heat exchanger for heating water, a burner section for heating the heat exchanger, a hot water thermistor for detecting the temperature of the hot water, a hot water temperature setting means for setting the temperature of the hot water, and a circulation for transporting the heated hot water A hot water heating apparatus comprising: a pump; a hot water circulation path formed between a radiator provided in a room and a heated pump that circulates the heated hot water through a circulation pump whose output is variable; The heating operation is controlled by a first temperature control pattern, a second temperature control pattern, and a third temperature control pattern, and the first temperature control pattern is a temperature that includes a set temperature of hot water when the circulation pump is operated strongly. When the detected temperature of the hot water reaches the belt, the combustion amount proportional control is performed. When the detected temperature of the hot water rises and reaches the combustion off temperature, the combustion is stopped and the temperature control pattern is switched to the second temperature control pattern . Temperature control Pattern circulating pump is re-burned in the middle combustion when the hot water of the detection temperature reaches the combustion on temperature hot water detected temperature is lowered after stopping the combustion reaches the combustion-off temperature with a weak operating temperature comprising combustion on temperature While the detection temperature of hot water is in the belt, the combustion amount proportional control is performed, and when the detection temperature of the hot water decreases and reaches the pattern switching temperature, the temperature adjustment control pattern is switched to the first temperature adjustment control pattern and the detection of hot water When the temperature rises and reaches the combustion off temperature, it switches to the third temperature control pattern. The third temperature control pattern is the warm water after the circulating pump is weakly operated and the detected temperature of the hot water reaches the combustion off temperature and the combustion is stopped. When the detected temperature decreases and reaches the combustion on temperature, recombustion occurs with minimum combustion. If the detected temperature of warm water after recombustion increases, the minimum combustion is constant and the detected temperature of warm water after recombustion does not increase. If the hot-water heating apparatus, wherein a temperature control pattern to increase the combustion quantity to mid combustion is switched to the second temperature control pattern.

A heat exchanger for heating water, a burner section for heating the heat exchanger, a hot water thermistor for detecting the temperature of the hot water, a hot water temperature setting means for setting the temperature of the hot water, and a circulation for transporting the heated hot water A hot water heating apparatus that forms a hot water circulation path with a radiator provided in a room and circulates the heated hot water through a hot water circulation path with a variable output pump, and heating the hot water heating apparatus The operation is controlled by a first temperature control pattern, a second temperature control pattern, and a third temperature control pattern, and the first temperature control pattern is set to a temperature range including a set temperature of hot water when the circulation pump is operated strongly. When the detected temperature of the hot water reaches, the combustion amount proportional control is performed. When the detected temperature of the hot water rises and reaches the combustion off temperature, the combustion is stopped and the temperature control pattern is switched. The second temperature control pattern is weak for the circulation pump. luck When the detected temperature of the hot water reaches the combustion off temperature and the combustion is stopped, the detected temperature of the hot water decreases and reaches the combustion on temperature. During the period of time, the combustion amount proportional control is performed, and when the detected temperature of the hot water decreases and the pattern switching temperature is reached, the temperature control control pattern is switched. When the detected temperature of the hot water drops and reaches the combustion on temperature after the temperature reaches the combustion off temperature and the combustion is stopped, the combustion is recombusted with the minimum combustion. If the detected temperature of the re-burned hot water does not rise at the hot water heating system which increases and temperature control pattern combustion amount until mid combustion is switched, the first temperature control pattern, hot water detected temperature is first When the temperature is lower than the proportional lower limit temperature, the maximum combustion is constant, the combustion amount proportional control is performed from the first proportional lower limit temperature including the set temperature of the hot water to the first proportional upper limit temperature, and higher than the first proportional upper limit temperature to the combustion off temperature. Combustion amount control with a fixed minimum combustion is performed, and the second temperature control pattern is switched when the detected temperature of the hot water reaches the combustion off temperature and the combustion is stopped in the first temperature control pattern, and the combustion on temperature is changed from the combustion off temperature. The combustion is stopped until the second proportional upper limit temperature including the combustion on temperature to the second proportional lower limit temperature, the combustion amount proportional control is performed, and the maximum combustion is constant until the pattern switching temperature is lower than the second proportional lower limit temperature, and the pattern switching is performed. When the temperature falls to the first temperature adjustment control pattern, the combustion amount control is performed with the minimum combustion constant until the combustion off temperature is higher than the second proportional upper limit temperature, and the third temperature adjustment control pattern Is switched when the detected temperature of the hot water reaches the combustion off temperature in the second temperature control pattern and the combustion is stopped, the combustion stops from the combustion off temperature to the combustion on temperature, and the minimum combustion occurs when the temperature drops to the combustion on temperature. If the detected temperature of warm water after re-combustion increases and the detected temperature rises to the combustion-off temperature and the detected temperature of warm water does not increase after re-combustion, increase the amount of combustion until intermediate combustion and increase the second temperature control. A hot water heater characterized by switching to a control pattern.