JP3792961B2

JP3792961B2 - Hot water heater

Info

Publication number: JP3792961B2
Application number: JP29856499A
Authority: JP
Inventors: 誠新部; 和博中澤
Original assignee: Corona Corp
Current assignee: Corona Corp
Priority date: 1999-10-20
Filing date: 1999-10-20
Publication date: 2006-07-05
Anticipated expiration: 2019-10-20
Also published as: JP2001116267A

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】
【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、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、静音化を図ることを目的としているものである。
【０００９】
【問題点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により制御され、前記第１温調制御パターンにて暖房運転を開始するすると共に、前記第１温調制御パターンは循環ポンプは強運転で、強燃焼で燃焼を開始し、温水の検知温度が温水の設定温度を含む温度帯では燃焼量比例制御を行い、該温度帯の下限より低い時は強燃焼を行い、該温度帯の上限から該温度帯の上限より高い燃焼オフ温度までの時は弱燃焼を行い、燃焼オフ温度になっ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、温水の検知温度が前記第１温調制御パターンの温度帯の下限より低い燃焼オン温度まで低下した時、中燃焼で再燃焼を開始し、前記第１温調制御パターンの温度帯の下限より低く燃焼オン温度を含む温度帯では燃焼量比例制御を行い、該温度帯の下限より低い時は強燃焼を行い、該温度帯の上限から該温度帯の上限より高い燃焼オフ温度までの時は弱燃焼を行い、燃焼オフ温度になったら燃焼停止させ、更に温水の検知温度が第２温調制御パターンの温度帯の下限より低いパターン切替温度まで低下した時、温調制御パターンが切り替わるものである。
【００１０】
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、請求項１に於いて、前記第１温調制御パターンの温度帯の温度幅を大きくすると共に、前記第２温調制御パターンの温度帯の温度幅を小さくしたものである。
【００１１】
【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、暖房運転開始時のように熱負荷が大きい時は、温水の温度が設定温度に近づいて燃焼量比例制御に入るまでは最大燃焼一定なので、温水温度を素早く高め、更に循環ポンプは強運転一定であるので、それにより室内の放熱器による放熱量を短時間で高めて暖房の立ち上がりをよくすることができ、また、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して設定温度付近に温水温度を制御し、更に温水の温度が燃焼量比例制御する温度帯を越えた時は、最小燃焼一定として温水への加熱を最低にすることにより、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。
【００１２】
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。
【００１３】
更に再燃焼開始後、温水温度が燃焼量比例制御の温度帯をはずれて低くなると最大燃焼一定として温水への加熱を最大にして温水温度の低下を妨げ、逆に再燃焼開始後、温水温度が燃焼量比例制御の温度帯をはずれて高くなると最小燃焼燃焼一定として温水への加熱を最低にして温水温度の上昇を妨げることにより、快適な暖房を保持しつつ循環ポンプを弱運転一定とする第２温調制御パターンでの暖房運転を継続させ、循環ポンプの省エネ及び静音化を図れるものである。
【００１４】
また、前記構成による請求項２に記載の温水暖房装置によれば、第１温調制御パターンの温度帯の温度幅を大きくすることにより、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、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。
【００１５】
更に、前記第２温調制御パターンの温度帯の温度幅を小さくすることにより、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、それにより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ると共に、逆に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。
【００１６】
【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。
【００１７】
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。
【００１８】
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。
【００１９】
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。
【００２０】
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）
【００２１】
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。
【００２２】
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。
【００２３】
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）
【００２４】
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）
【００２５】
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。
【００２６】
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）
【００２７】
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）
【００２８】
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。
【００２９】
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弱運転の状態で暖房運転が行われ（Ｓ１７）、温水検知温度ｔが燃焼オフ温度Ｔ３に達すると（Ｓ１８）、循環ポンプ１３弱運転の状態で燃焼停止する。（Ｓ１２）
【００３０】
また、再燃焼開始後、温水検知温度ｔが燃焼オン温度Ｔ４より低下すると、それに対応して燃焼量も中燃焼から徐々に大きくなり、温水検知温度ｔが第２比例下限温度Ｔ５に達した時、燃焼量は最大となる。
【００３１】
そして温水検知温度ｔが更に低下して第２比例下限温度Ｔ５より低くなると（Ｓ１９）、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。（Ｓ２０）
【００３２】
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（Ｓ２１）、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（Ｓ２２）、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）
【００３３】
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の２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。
【００３４】
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。
【００３５】
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。
【００３６】
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。
【００３７】
なお、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い。
【００３８】
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。
【００３９】
【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。
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。
【００４０】
更にこの発明の請求項２に記載の温水暖房装置によれば、１温調制御パターンの温度帯の温度幅を大きくすることにより、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、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とともに、前記第２温調制御パターンの温度帯の温度幅を小さくすることにより、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、それにより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ると共に、逆に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。
【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]
[Problems to be solved by the invention]
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, 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 purpose of this product is to reduce the power consumption and reduce noise by reducing the power consumption of the circulating pump by controlling the speed of the circulating pump and changing it while preventing the life of the equipment from being shortened. It is.
[0009]
[Means for solving 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 is controlled by a first temperature control pattern and a second temperature control pattern . The heating operation is started with the temperature control pattern, and the first temperature control pattern is a temperature range in which the circulating pump is in a strong operation and starts to burn in the strong combustion, and the detected temperature of the hot water includes the set temperature of the hot water Then, the combustion amount proportional control There, when lower than the lower limit of the temperature band performs a strong combustion, when from the upper limit of the temperature range up to a high combustion-off temperature than the upper limit of the temperature band performs a weak combustion, combustion stops Once turned to the combustion off temperature When the temperature control pattern is switched, the second temperature control pattern is when the circulating pump is operated weakly, and the detected temperature of the hot water is lowered to the combustion on temperature lower than the lower limit of the temperature zone of the first temperature control pattern, Recombustion is started in medium combustion, and proportional combustion control is performed in a temperature range that is lower than the lower limit of the temperature range of the first temperature control pattern and includes the combustion on temperature, and strong combustion is performed when lower than the lower limit of the temperature range. When the temperature is higher than the upper limit of the temperature range to a combustion off temperature higher than the upper limit of the temperature range, weak combustion is performed, combustion is stopped when the combustion off temperature is reached, and the detected temperature of the hot water is the second temperature control pattern. Pattern lower than the lower limit of the temperature range When it dropped to exchange temperature, in which temperature control pattern is switched.
[0010]
Further, in the hot water heating apparatus according to claim 2 of the present invention, in particular, in the structure, in claim 1, the temperature range of the temperature zone of the first temperature control pattern is increased and the second temperature control is performed. The temperature range of the temperature zone of the pattern is reduced .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
According to the hot water heating apparatus of the first aspect having the above-described configuration, in the first temperature control pattern, when the heat load is large as at the start of the heating operation, the temperature of the hot water approaches the set temperature and is proportional to the combustion amount. Since the maximum combustion is constant until the control is started, the hot water temperature is quickly increased, and the circulation pump is constantly operating at a high level, so that the amount of heat released by the indoor radiator can be increased in a short time to improve the start-up of the heating. In addition, when the detected temperature of the hot water reaches a temperature around the set temperature, the combustion amount is proportionally controlled with respect to the detected temperature of the hot water, the hot water temperature is controlled near the set temperature, and the temperature of the hot water is further proportionally controlled with the combustion amount. When the temperature range is exceeded, the minimum combustion is kept constant and the heating to the warm water is minimized, so that the number of repetitions of stop and re-combustion can be reduced and the life of the equipment can be prevented from being shortened.
[0012]
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 drops to the combustion on temperature, the combustion is recombusted and the combustion amount proportional control is performed while the detected temperature of the hot water is in the temperature range including the combustion on temperature. If the combustion amount is small and the hot water temperature further decreases in medium combustion, the combustion amount is increased proportionally to increase the heat dissipation amount by the radiator in the room. Now, in medium combustion, if the amount of combustion is large and the hot water temperature rises, the amount of combustion is reduced in proportion to it, and the amount of heat released by the indoor radiator is made smaller than that in the middle combustion, thereby releasing the air discharged 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.
[0013]
Furthermore, after the start of recombustion, if the hot water temperature falls outside the temperature range of combustion amount proportional control, the maximum combustion is kept constant and heating to the hot water is maximized to prevent the warm water temperature from decreasing. If the temperature rises outside the temperature range of the combustion proportional control, the minimum combustion combustion is constant and the heating to the hot water is minimized to prevent the warm water temperature from rising. Heating operation with the two-temperature control pattern can be continued to save energy and reduce noise of the circulation pump.
[0014]
According to the hot water heating device of claim 2 configured as described above, the combustion amount control near the set temperature of the hot water temperature is made fine by increasing the temperature range of the temperature zone of the first temperature control pattern. Thus, the hot water temperature can be easily maintained in the vicinity of the set temperature, thereby suppressing the vertical movement change of the hot water temperature, thereby suppressing the number of times of stopping and re-combusting, and preventing the life of the equipment from being shortened.
[0015]
Further, by reducing the temperature range of the temperature zone of the second temperature control pattern, the amount of combustion can be varied in response to slight changes in hot water temperature after re-combustion, and combustion is caused by changes in heat load after combustion is stopped. The amount can be made to correspond quickly, whereby it is possible to prevent the combustion from stopping immediately after the hot water temperature suddenly increases due to recombustion, and conversely, the hot water temperature can be prevented from further lowering.
[0016]
【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.
[0017]
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.
[0018]
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.
[0019]
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.
[0020]
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)
[0021]
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.).
[0022]
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.
[0023]
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)
[0024]
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)
[0025]
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.
[0026]
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)
[0027]
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)
[0028]
When recombustion is started in the middle combustion, the combustion amount is controlled in proportion to the combustion amount e as shown in FIG. 4 (S15), and after the start of recombustion, the hot water detection temperature t is set to the combustion on temperature T4. When the temperature rises further, the combustion amount gradually decreases from the middle combustion, and when the hot water detection temperature t reaches the second proportional upper limit temperature T6, the combustion amount becomes minimum.
[0029]
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. The heating operation is performed in the weak operation state (S17), and when the hot water detection temperature t reaches the combustion off temperature T3 (S18), the circulation pump 13 is stopped in the weak operation state. (S12)
[0030]
In addition, when the hot water detection temperature t decreases from the combustion on temperature T4 after the start of recombustion, the amount of combustion gradually increases from the middle combustion correspondingly, and the hot water detection temperature t reaches the second proportional lower limit temperature T5. The amount of combustion is maximized.
[0031]
When the hot water detection temperature t further decreases and becomes lower than the second proportional lower limit temperature T5 (S19), the circulating pump 13 is at a maximum combustion constant until the hot water detection temperature t reaches the pattern switching temperature T7 as shown in g of FIG. Heating operation is performed in a weak operation state. (S20)
[0032]
When the hot water detection temperature t finally decreases to the pattern switching temperature T7 (S21), the controller 18 switches the temperature control pattern from the second temperature control pattern B to the first temperature control pattern A (S22), and the burner 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)
[0033]
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. By switching and controlling the two temperature control patterns with the second temperature control pattern to be performed, when the hot water temperature and the room temperature are low as at the start of the heating operation, the hot water is supplied according to the first temperature control pattern with priority to heating. In order to quickly raise the temperature of the heater, the heating operation is started with the maximum combustion, and in order to quickly raise the temperature of the room to be heated, the circulation pump 13 is started with the strong operation and the heating operation is started. It is possible to maximize the amount of heat released from the heater and speed up the heating.
[0034]
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.
[0035]
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.
[0036]
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.・ The second temperature control pattern that prioritizes energy saving and quiet operation of the circulation pump 13 by reducing the repetition of re-combustion. In addition to being able to perform comfortable heating while maintaining the above temperature, 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 to reduce noise.
[0037]
In the present embodiment, the hot water heater 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 However, the present invention is not limited to this, and the hot water returned from the return pipe 4 passes 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 exchanged. A direct pressure type that is adjusted by increasing or decreasing the hot water in the cistern tank 23 connected to the upstream side of the vessel 12 may be used.
[0038]
Further, in the case of this direct pressure type, the hot water whose temperature is detected by the temperature thermistor 11 may be either hot water that has gone back or returned to the hot water heater.
[0039]
【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.
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.
[0040]
Further, according to the hot water heating apparatus of the second aspect of the present invention, the combustion amount control near the set temperature of the hot water temperature is set finely by increasing the temperature range of the temperature zone of the one temperature control pattern. The hot water temperature is easily maintained near the temperature, thereby suppressing the vertical movement change of the hot water temperature, thereby suppressing the number of times of stopping and re-combusting, preventing the life of the equipment from being shortened, and the second temperature. By reducing the temperature range of the temperature range of the adjustment control pattern, the combustion amount can be changed in response to a slight change in hot water temperature after recombustion, and the combustion amount can be quickly responded to the change in heat load after combustion stop, Accordingly, it is possible to prevent the hot water temperature from rapidly rising due to re-combustion and immediately stop the combustion, and conversely, the hot water temperature can be prevented from further lowering.
[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 Heat Dissipator 5 Hot Water Circulation Path 9 Burner 11 Hot Water Thermistor 12 Radiator 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 with a radiator provided in a room; The heating operation is controlled by the first temperature adjustment control pattern and the second temperature adjustment control pattern, and the heating operation is started by the first temperature adjustment control pattern. In strong operation, combustion starts with strong combustion, and the combustion amount proportional control is performed in the temperature range where the detected temperature of the hot water includes the set temperature of the hot water, and strong combustion is performed when the temperature is lower than the lower limit of the temperature range. Above the upper temperature range Perform the weak combustion time until higher combustion off temperature, combustion off temperature to stop combustion toggles temperature control pattern Once turned, the second temperature control pattern is a circular pump weak operation, hot water temperature detected Is reduced to the combustion on temperature lower than the lower limit of the temperature zone of the first temperature control pattern, the re-combustion is started in the middle combustion, and the combustion on temperature is set lower than the lower limit of the temperature zone of the first temperature control pattern. In the temperature range that includes the combustion amount proportional control, strong combustion is performed when lower than the lower limit of the temperature range, weak combustion is performed from the upper limit of the temperature range to the combustion off temperature higher than the upper limit of the temperature range, when turned to the combustion off temperature combustion is stopped, further when the hot water temperature detected decreases to a lower pattern switching temperature than the lower limit of the temperature zone of the second temperature control pattern, hot water heating, characterized in that the temperature control pattern is switched Location.

The hot water heater according to claim 1 , wherein the temperature range of the temperature zone of the first temperature control pattern is increased and the temperature range of the temperature zone of the second temperature control pattern is decreased .