JP3829350B2

JP3829350B2 - Bath water heater

Info

Publication number: JP3829350B2
Application number: JP00707096A
Authority: JP
Inventors: 龍志岩本; 雄一江村; 崇夫田中; 裕文河島; 修一竹村
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 1996-01-19
Filing date: 1996-01-19
Publication date: 2006-10-04
Anticipated expiration: 2016-01-19
Also published as: JPH09196466A

Description

【０００１】
【発明の属する技術分野】
本発明は、一般家庭用のふろ釜付きのふろ給湯器に関し、さらに詳しくは給湯燃焼開始時の水量制御に関するものである。
【０００２】
【従来の技術】
近年、給湯器においては給湯栓使用時の湯質の向上が求められており、特に一旦給湯燃焼した後、再度給湯燃焼を行う場合の湯の後沸き現象（高温出湯）や前冷え現象（低温出湯）を無くし、常に設定温度で出湯する機能が必須になってきている。
【０００３】
そこで従来のふろ給湯器に関して、図面を用いて説明する。
図１２は従来のふろ給湯器の構成図である。図１２において、３９はリモコン、４０は給湯燃焼ブロック、４１は水量制御弁、４２はバイパス比例弁、４３は熱交温度センサー、４４は出湯温度センサー、４５は注湯弁、４６はふろ燃焼ブロック、４７は循環ポンプ、４８は配管、４９は浴槽である。
【０００４】
動作を簡単に説明すると、熱交温度センサー４３の検出する熱交温度が所定温度になるように給湯燃焼ブロック４０を比例燃焼させる。そして出湯温度センサー４４の検出する温度がリモコン３９にて設定した設定温度になるように、バイパス比例弁４２を比例制御する。
【０００５】
この動作は、注湯弁４５を開けて、注湯動作を行う場合も同様で、リモコン３９にて設定された温度の湯が、循環ポンプ４７と配管４８を経由して浴槽４９に自動注湯される。
【０００６】
ここで、給湯燃焼が一度停止して所定時間だけ給湯ファンのみ動作する期間（以降、給湯ファン残しと言う）。の水量制御弁４１とバイパス比例弁４２の制御の中で、特に、給湯ファン残し状態から再度給湯燃焼した場合の出湯温度を所定温度に保持する動作に関して、図１２と図１３を用いて説明する。
【０００７】
図１３にて、５０は給湯ファン残しになったことを検出する点消火判定手段、５１は水量制御弁５２の全開位置Ｐ１と全閉位置Ｐ２を検出する機能を有する水量制御弁制御手段、５３は点消火判定手段５０が給湯ファン残しを判定した結果を受けて、水量制御弁５２を全開方向へ駆動要求を出す全開駆動要求手段、５４は水量制御弁制御手段によって全開方向へ駆動し、全開位置を検出した後、所定時間Ｔ_Aをカウントするタイマー手段５５を有する閉駆動要求手段である。
【０００８】
動作を説明すると、点消火判定手段５０にて給湯ファン残し状態を判断すると、全開駆動要求手段５３による全開駆動要求信号を受けて、水量制御弁制御手段５１によって水量制御弁５２を一旦「全開位置Ｐ１」まで「開方向」動作する。
【０００９】
次に水量制御弁５２の水量制御弁制御手段５１が全開位置Ｐ１を検出すると、水量制御弁制御手段５１が、タイマー手段５５の所定時間Ｔ_Aカウントの間、今度は「閉方向」動作を行う。タイマー手段５５の所定時間Ｔ_Aのカウントが終了すると、水量制御弁制御手段５１によって駆動を停止する。
【００１０】
以上の水量制御弁の動作で水量が所定量に絞られた状態となる。この一連の動作は、再度出湯するときの給湯燃焼ブロックの熱交換器側配管への流量を少なくし、熱交温度の低下を抑制し、後沸き現象や前冷え現象を防ぐ為の動作である。
【００１１】
水量制御弁を所定量絞った状態は、給湯ファン残し状態の間保持され、再度出湯されるのを待機する。
【００１２】
次に、再度出湯されたことを点消火判定手段５０が判定すると、給湯燃焼ブロック４０により給湯燃焼が始まる。給湯燃焼が始まると熱交温度センサー４３により熱交温度の測定が開始され、熱交温度が所定温度以上または給湯燃焼が最大燃焼になるまで、水量制御弁４１を絞った位置に固定しておく。
【００１３】
【発明が解決しようとする課題】
しかしながら上記のような構成では、熱交換器側の配管に湯ではなく水が満たされた状態（熱交温度が低温）である場合、再度出湯によって給湯燃焼が行われても、燃焼によって熱交温度の上昇に時間を要す為、熱交温度が所定温度に達するまで、給湯使用時に水量制御弁が閉じられた位置のままで保持される。
【００１４】
従って、給湯使用直後から出湯流量が少ないままとなり、使用者に取って使い勝手が悪いものであった。
【００１５】
また上記したような水量保持動作は、ガス圧を調整する調整動作状態においても有効な機能であり、調整動作専用の水量制御が無効となり、ふろ給湯器の製造工程においての性能検査等に影響を及ぼす動作であった。
【００１６】
また自動注湯動作についても同様で、注湯弁４６の開動作によって給湯燃焼が始まるが、注湯流量が少ないまま保持されるので、注湯時間が従来と比較し長くなっていた。
【００１７】
また熱交温度センサー４３が故障し、熱交温度検出できない場合、実際の熱交温度が上昇しても水量保持動作を解除する条件が満たされず、水量保持の継続時間が長くなり、これもまた使用者にとって使い勝手が悪いものであった。
【００１８】
また水量制御弁回路内の異物の噛み込み等で制御不能になった場合、以降水量制御弁を動作させない為、水量保持動作が事実上継続することになり、これもまた使用者にとって使い勝手が悪いものであった。
【００１９】
【課題を解決するための手段】
本発明のふろ給湯器においては、熱交温度を検出する熱交温度検出手段と、出湯が停止され給湯ファン残し状態になったことを判定するファン残し判定手段と、給湯ファン残し状態判定直後の熱交温度を判断する熱交温度低温判定手段と、停止状態から出湯されたか、給湯ファン残し状態から出湯されたかを判断する出湯判断手段と、前記熱交温度低温判定手段の判定結果に応じて水量制御弁を所定流量まで絞る水量制御弁閉動作制御手段および水量制御弁を全開状態とする水量制御弁全開制御手段と、所定流量まで絞られた水量制御弁の制御位置を保持する保持制御手段と、指示された流量に水量制御弁を制御する通常制御手段とを備え、給湯ファン残し状態から出湯された場合、前記熱交温度低温判定手段の判定結果が高温判定時には、熱交温度が所定温度以上を検出するまで所定流量に絞られた水量制御弁の制御位置を保持する水量保持動作を行い、低温判定時には、出湯と同時に通常の水量制御動作を行うシーケンス制御手段を備えている。
【００２０】
この本発明によれば給湯ファン残し時点の熱交温度を判定し、熱交温度が低ければ、水量制御弁の閉動作を行わず、かつ次回出湯時に即通常の水量制御を行うので、設定温度相当の出湯温度と出湯流量を確保でき、シャワー使用時の水量が少ないことの不快感等を撲滅でき、使い勝手を向上できる。
【００２１】
【発明の実施の形態】
本発明の第１の手段は、熱交温度を検出する熱交温度検出手段と、出湯が停止され給湯ファン残し状態になったことを判定するファン残し判定手段と、給湯ファン残し状態判定直後の熱交温度を判断する熱交温度低温判定手段と、停止状態から出湯されたか、給湯ファン残し状態から出湯されたかを判断する出湯判断手段と、前記熱交温度低温判定手段の判定結果に応じて水量制御弁を所定流量まで絞る水量制御弁閉動作制御手段および水量制御弁を全開状態とする水量制御弁全開制御手段と、所定流量まで絞られた水量制御弁の制御位置を保持する保持制御手段と、指示された流量に水量制御弁を制御する通常制御手段とを備え、給湯ファン残し状態から出湯された場合、前記熱交温度低温判定手段の判定結果が高温判定時には、熱交温度が所定温度以上を検出するまで所定流量に絞られた水量制御弁の制御位置を保持する水量保持動作を行い、低温判定時には、出湯と同時に通常の水量制御動作を行うシーケンス制御手段を備えたものである。
【００２２】
また本発明の第２の手段は、ガス圧等を調整する調整動作切り換え手段と、前記調整動作切り換え手段の切り換えを判断する調整動作判定手段を設け、給湯ファン残し状態から出湯した場合でも、調整動作中であれば水量の保持動作を解除するシーケンス制御手段を備えたものである。
【００２３】
また本発明の第３の手段は、自動注湯動作を判定する注湯動作判定手段を設け、給湯ファン残し状態から出湯した場合でも、注湯中であれば水量の保持動作を解除するシーケンス制御手段を備えたものである。
【００２４】
また本発明の第４の手段は、熱交温度センサー故障検出手段を設け、前記熱交温度センサーの故障検出時には、前記水量の保持動作を即解除するシーケンス制御手段を備えたものである。
【００２５】
また本発明の第５の手段は、水量制御弁故障検出手段と、前記水量制御弁故障時に所定時間をカウントするタイマー手段と、前記タイマー手段の所定時間のカウント中だけ水量制御弁を「開方向」動作を指示する開動作手段とを設け、水量制御弁の故障時には、水量制御弁を所定時間「開」方向へ駆動し出湯流量を確保する改善動作シーケンス制御手段を備えたものである。
【００２６】
本発明の第１の手段により、熱交換器の温度が所定温度より低い場合、水量制御弁は全開となり、かつ、再度出湯する場合の水量保持動作は行わず、即通常の水量制御を行うことができる。
【００２７】
また本発明の第２の手段により、調整動作状態に切り換われば、水量制御の保持動作を即解除するので、製造工程における専用水量制御動作を行うことができる。
【００２８】
また本発明の第３の手段により、注湯動作の始まりを判定した場合、水量保持動作を即解除するので、通常の計算値を目標水量とした水量制御を行うことができる。
【００２９】
また本発明の第４の手段により、熱交温度センサーの故障により熱交温度が正常に検出できない場合は、即通常の水量制御を行うことができる。
【００３０】
また本発明の第５の手段により、水量制御弁が正常に制御できない事を検出した場合は、水量制御弁を所定時間「開」方向へ駆動させるので、出湯流量を多く確保することができる。
【００３１】
本発明の請求項１の実施例を図面を用いて説明する。図１は本発明の実施例のふろ給湯器の構成図である。１はリモコン、２はふろ給湯器、３は浴槽、４は給湯燃焼ブロック、５はふろ燃焼ブロック、６は流量センサー、７は給湯熱交換器、８は熱交側配管、９はバイパス側配管、１０は熱交温度センサー、１１は出湯温度センサー、１２はバイパス比例弁、１３は水量制御弁、１４は注湯弁、１５はふろ熱交換器、１６は配管、１７はふろ給湯器２の全体を制御する制御装置である。
【００３２】
動作を簡単に説明すると、流量センサー６によって水量を検出すると給湯燃焼ブロック４により給湯燃焼が始まる。給湯燃焼が始まると熱交側配管８の湯温を熱交温度センサー１０により検出し、熱交温度が所定温度になる様に給湯燃焼ブロック４を比例燃焼させる。
【００３３】
そして出湯温度センサー１１の検出する湯温がリモコン１にて設定した設定温度になるように、バイパス側配管９の水量をバイパス比例弁１２によって比例制御する。
【００３４】
そして、総合流量を水量制御弁１３にて制御し、所定の温度と流量が蛇口から出湯される構成になっている。
【００３５】
また上記動作は、注湯弁１４を開けて、注湯動作を行う場合も同様で、リモコン１にて設定された湯温がふろ熱交換器１５を経由し、配管１６を通って浴槽３に自動注湯される。
【００３６】
ここで、給湯ファン残し中から出湯した時の本発明の請求項１の動作について図面を用いて説明する。
【００３７】
図２にて、１８は熱交温度センサー、１９は流量センサー、２０は熱交温度検出手段、２１は熱交温度低温判定手段、２２はファン残し判定手段、２３は出湯判定手段、２４は水量制御弁閉制御手段、２５は水量制御弁全開制御手段、２６は解除温度検出手段、２７は保持制御手段、２８は通常制御手段、２９は水量制御弁である。
【００３８】
動作を説明すると、給湯燃焼中に蛇口（図示せず）等が閉じられ流量センサー１９によって消火水量が検出されると、ファン残し判定手段２２がこれを判定し給湯ファン残し状態にする。
【００３９】
またファン残し判定手段２２の給湯ファン残し決定と同時に、熱交温度センサー１８の温度を熱交温度検出手段２０によって検出し、熱交温度低下判定手段２１により、熱交温度が所定温度Ｔ₀以下かどうかを判定する。
【００４０】
熱交温度低温判定手段２１にて熱交温度が所定温度Ｔ₀を越える信号Ｈを判定した場合、水量制御弁閉動作制御手段２４により水量制御弁２９を所定流量まで絞り、給湯ファン残しの期間その状態を保持する。
【００４１】
次に熱交温度低温判定手段２１にて熱交温度が所定温度Ｔ₀以下である信号Ｌを判定した場合、水量制御弁全開制御手段２５により水量制御弁２９を全開位置まで開き、給湯ファン残しの期間その状態を保持する。
【００４２】
以上のように、熱交温度によって水量制御弁２９を絞る場合と開く場合を判別し、次回の出湯を待機する。
【００４３】
次に流量センサー１９が点火水量を検出し、出湯判定手段２３でファン残し中に出湯ありと判断すると次のような水量制御を行う。
【００４４】
先ず熱交温度低温判定手段２１が信号Ｈを判定した場合、解除温度検出手段２６により熱交温度が所定温度Ｔ₁以上が否かを判断する。解除温度検出手段２６が熱交温度の所定温度Ｔ₁以下を検出中は、水量制御弁閉制御手段２４によって絞られた制御位置を保持制御手段２７により保持し、出湯流量を増やさないようにする。
【００４５】
そして、解除温度検出手段２６が熱交温度の所定温度Ｔ₁ 以上を検出すれば、通常制御手段２８により水量制御弁２９を絞った状態から通常の制御状態に切り換え、水量制御を行う。
【００４６】
次に熱交温度低温判定手段２１が信号Ｌを判定した場合、出湯と同時に通常制御手段２８によって、水量制御弁２９を通常の状態とし、水量制御を行う。上記動作の内容の概略フローチャートを図３に示す。
【００４７】
以上の様に予め熱交温度が所定温度Ｔ₁より低い場合は、水量制御弁を閉じることなく、出湯時には即通常の水量制御を行うことができる。
【００４８】
また上記では判定温度を熱交温度（絶対値）として説明したが、偏差温度（相対値）として判定でき、このことはマイコンを搭載している場合、外部回路として専用回路を追加・変更などすること無く、プログラムの構成を変更することで容易に実現できることができる。
【００４９】
次に本発明の請求項２の実施例を図面を用いて説明する。説明においては、請求項１の実施例と同じ内容は省略し相違している点について説明する。
【００５０】
図４は本発明の第２の手段の実施例の給湯ファン残し中の出湯時の水量制御に関するブロック図である。図４において、３０は調整動作切り換え手段、３１は調整動作判定手段、３２は調整専用制御手段である。
【００５１】
動作について給湯ファン残し中に出湯した場合を説明する。出湯されると、閉制御手段２４によって絞られた水量制御弁２９の位置を保持制御手段２７によって保持し、解除温度検出手段２６にて所定温度Ｔ₁以上を判定するまで継続される。
【００５２】
この間、調整動作切り換え手段３０によって、通常の燃焼状態から調整動作用の燃焼状態に切り換えられた場合、調整動作判断手段３１がそれを判断し、保持制御手段２７と調整専用制御手段３２に伝える。保持制御手段２７は調整動作の切り換わりと同時に水量制御弁２９の保持動作を解除する。
【００５３】
そして、調整専用制御手段３２により調整動作専用の水量制御（例えば、調整動作「１」は最小燃焼時の調圧を行う状態で、かつ水量制御は最小流量例えば６Ｌ／ｍｉｎに制御する）。を行う。上記動作の内容の概略フローチャートを図５に示す。
【００５４】
以上のように調整動作の切り換えを行うことで、水量制御保持動作中であっても、水量制御弁による水量制御を即調整動作専用の水量制御に切り換えることができる。
【００５５】
次に本発明の請求項３の一実施例を図面を用いて説明する。説明においては、請求項１の実施例と同じ内容は省略し相違する点のみ説明する。
【００５６】
図６は本発明の第３の手段の実施例の給湯ファン残し中の出湯時の水量制御に関するブロック図である。図６において、３３はリモコン、３４は注湯動作判定手段である。
【００５７】
動作について給湯ファン残し中にリモコン３３内の自動お湯はりスイッチ（図示せず）を操作した場合を説明する。
【００５８】
水量制御弁２９は本発明の第２の手段の実施例にて説明した通り、閉制御手段２４によって所定量に絞られ、解除温度検出手段２６の所定温度Ｔ₁検出を待っている状態にある。
【００５９】
この時、自動お湯はりスイッチをオンすると、注湯弁（図示せず）が開き自動注湯が開始され、給湯燃焼が始まる。
【００６０】
一方、自動お湯はりスイッチのオン操作を注湯動作判定手段３４が判定すると、保持制御手段２７と通常制御手段２８に判定結果を伝え、保持制御手段２７は水量制御弁２９の保持動作を解除する。そして、通常制御手段２８により通常の水量制御（例えば、１８Ｌ／ｍｉｎ制御）を行う。
【００６１】
上記動作の内容の概略フローチャートを図７に示す。
次に本発明の請求項４の実施例を図面を用いて説明する。説明においては、請求項１の実施例と同じ内容は省略し相違する点のみ説明する。
【００６２】
図８は本発明の第４の手段の実施例の給湯ファン残し中の出湯時の水量制御に関するブロック図である。図８において、３５は熱交温度異常判定手段である。
【００６３】
動作について給湯ファン残し中に出湯した場合を説明する。出湯されると、閉制御手段２４によって絞られた水量制御弁２９の位置を保持制御手段２７によって保持し、解除温度検出手段２６にて所定温度Ｔ₁以上を判定するまで継続される。
【００６４】
この間、熱交温度異常判定手段３５によって、熱交温度の異常（高温側異常または低温側異常）を検出すると、その結果を保持制御手段２７と通常制御手段２８に伝える。保持制御手段２７は熱交温度の異常を検出すると同時に水量制御弁２９の保持動作を解除する。
【００６５】
そして、通常制御手段２８により通常の水量制御（例えば、２４Ｌ／ｍｉｎに制御）を行う。上記動作の内容の概略フローチャートを図９に示す。
【００６６】
次に本発明の請求項５の実施例を図面を用いて説明する。説明においては、請求項１の実施例と同じ内容は省略し相違する点のみ説明する。
【００６７】
図１０は本発明の第５の手段の実施例の給湯ファン残し中の出湯時の水量制御に関するブロック図である。図１０において、３６は水量制御弁２９の制御上の故障を検出する故障検出手段、３７は所定時間ｔ₀をカウントするタイマー手段、３８は前記タイマー手段３７のカウントの間水量制御弁２９を「開方向」に駆動制御する開制御手段である。
【００６８】
動作について説明すると、給湯ファン残しになった時から閉制御手段２４または全開制御手段２５により水量制御弁２９を閉または開駆動している間、故障検出手段３６によって常に故障を監視している。
【００６９】
また出湯した場合の通常制御手段２８の開閉動作時においても同様に故障検出手段３６によって常に故障を監視している。
【００７０】
ここで、閉制御手段２４にて閉駆動中に水量制御弁２９の制御上の故障を故障検出手段３６が検出したとすると、給湯ファン残し中に出湯されると、燃焼が始まって熱交温度が上昇し、解除温度判定手段２６が所定温度Ｔ₁以上を検出して、水量制御弁２９を通常の水量制御に切り換えようとしても、既に水量制御弁２９は故障検出状態にあり、駆動することが出来ず水量は絞られたままとなる。
【００７１】
そこで、故障検出手段３６の故障検出と同時に所定時間ｔ₀をカウントするタイマー手段３７に所定時間ｔ₀をセットし、かつ、開制御手段３８にて水量制御弁２９を再度「開方向」に駆動させる。
【００７２】
そしてタイマー手段３７の所定時間ｔ₀のカウントが終了した時、開制御手段３８により水量制御弁２９の駆動を停止させる。
【００７３】
【発明の効果】
本発明の第１の手段により、給湯ファン残し時点の熱交温度を判定し、熱交温度が低ければ、水量制御弁の閉動作を行わず、かつ次回出湯時に即通常の水量制御を行うので、設定温度相当の出湯温度と出湯流量を確保でき、シャワー使用時の水量が少ないことの不快感等を撲滅でき、使い勝手を向上できる。
【００７４】
また本発明の第２の手段により、調整動作に切り換えた場合、即調整動作中の水量制御を行う為、ふろ給湯器組立時の性能検査における水量の確認が支障なく行うことができる。
【００７５】
また本発明の第３の手段により、注湯動作を行えば、即通常の水量制御を行う為、自動注湯時間を増加させることなく自動注湯ができ、使い勝手を向上する事が出来る。
【００７６】
また本発明の第４の手段により、熱交温度センサーや検出回路等の故障を検出すると、即通常の水量制御を行う為、出湯流量を確保することができ、給湯使用時の使い勝手を向上することができる。
【００７７】
また本発明の第５の手段により、水量制御弁がゴミ噛み込み等で制御上故障検出した場合、再度所定時間だけ開方向に水量制御弁を駆動する為、出湯時の流量を確保できるので使い勝手が向上できる。
【図面の簡単な説明】
【図１】本発明の実施例のふろ給湯器の構成図
【図２】本発明の請求項１記載に係わる実施例のふろ給湯器のブロック図
【図３】同ふろ給湯器のフローチャート
【図４】本発明の請求項２記載に係わる実施例のふろ給湯器のブロック図
【図５】同ふろ給湯器のフローチャート
【図６】本発明の請求項３記載に係わる実施例のふろ給湯器のブロック図
【図７】同ふろ給湯器のフローチャート
【図８】本発明の請求項４記載に係わる実施例のふろ給湯器のブロック図
【図９】同ふろ給湯器のフローチャート
【図１０】本発明の請求項５記載に係わる実施例のふろ給湯器のブロック図
【図１１】同ふろ給湯器のフローチャート
【図１２】従来のガスふろ給湯器の構成図
【図１３】同給湯器の動作を説明するブロック図
【図１４】同給湯器の動作手順を示すフローチャート
【符号の説明】
２ふろ給湯器
６流量センサー
７給湯熱交換器
８熱交側配管
１０熱交温度センサー
１１出湯温度センサー
１３水量制御弁
１４注湯弁
１５ふろ熱交換器
１７制御手段[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bath water heater with a bath pot for general households, and more particularly to water amount control at the start of hot water combustion.
[0002]
[Prior art]
In recent years, hot water heaters have been required to improve the quality of hot water when using hot water taps, especially after boiling hot water and then hot water combustion again after hot water boiling (high temperature hot water) or pre-cooling (low temperature) The function of constantly removing hot water at a set temperature has become essential.
[0003]
Therefore, a conventional bath water heater will be described with reference to the drawings.
FIG. 12 is a configuration diagram of a conventional bath water heater. In FIG. 12, 39 is a remote control, 40 is a hot water combustion block, 41 is a water amount control valve, 42 is a bypass proportional valve, 43 is a heat exchange temperature sensor, 44 is a tapping temperature sensor, 45 is a pouring valve, 46 is a bath combustion block. 47 are circulation pumps, 48 is piping, and 49 is a bathtub.
[0004]
Briefly describing the operation, the hot water supply combustion block 40 is proportionally burned so that the heat exchange temperature detected by the heat exchange temperature sensor 43 becomes a predetermined temperature. The bypass proportional valve 42 is proportionally controlled so that the temperature detected by the hot water temperature sensor 44 becomes the set temperature set by the remote controller 39.
[0005]
This operation is the same when the pouring operation is performed by opening the pouring valve 45, and hot water at a temperature set by the remote controller 39 is automatically poured into the bathtub 49 via the circulation pump 47 and the pipe 48. Is done.
[0006]
Here, the hot water combustion stops once and only the hot water supply fan operates for a predetermined time (hereinafter referred to as hot water supply fan remaining). In the control of the water amount control valve 41 and the bypass proportional valve 42, the operation of maintaining the hot water temperature at a predetermined temperature when the hot water supply combustion is performed again from the hot water supply remaining state will be described with reference to FIGS. .
[0007]
In FIG. 13, 50 is a point-extinguishing determination means for detecting that the hot water supply fan is left, 51 is a water amount control valve control means having a function of detecting the fully open position P1 and the fully closed position P2 of the water amount control valve 52, 53 In response to the result of the point fire extinguishing determination means 50 determining that the hot water supply fan remains, a fully open drive request means for issuing a drive request for the water amount control valve 52 in the fully open direction, and 54 is driven in the fully open direction by the water amount control valve control means. after detecting the position, in a closed drive request means having a timer means 55 for counting a predetermined time T _a.
[0008]
The operation will be explained. When the hot water supply fan remaining state is judged by the point fire extinguishing judgment means 50, the water quantity control valve control means 51 receives the full opening drive request signal from the full opening drive request means 53 and the water quantity control valve control means 51 once sets the "full open position". “Open direction” operation up to “P1”.
[0009]
Next, when water control valve control means 51 of the water amount control valve 52 detects the full open position P1, water control valve control means 51, for a predetermined time T _A count of the timer means 55, in turn performs the operation "closing direction" . When the count of the predetermined time T _A of the timer means 55 is completed, and stops driving by the water amount control valve control means 51.
[0010]
By the operation of the water amount control valve described above, the water amount is reduced to a predetermined amount. This series of operations is an operation to reduce the flow rate to the heat exchanger side piping of the hot water supply combustion block when the hot water is discharged again, to suppress the decrease in the heat exchange temperature, and to prevent the post-boiling phenomenon and the pre-cooling phenomenon. .
[0011]
The state in which the water amount control valve is throttled by a predetermined amount is maintained while the hot water supply fan remains, and waits for hot water to be discharged again.
[0012]
Next, when the point-extinguishing determination unit 50 determines that the hot water has been discharged again, the hot water supply combustion block 40 starts hot water supply combustion. When hot water combustion starts, the heat exchange temperature sensor 43 starts measuring the heat exchange temperature, and the water amount control valve 41 is fixed at a narrowed position until the heat exchange temperature is equal to or higher than a predetermined temperature or until hot water combustion reaches maximum combustion. .
[0013]
[Problems to be solved by the invention]
However, in the configuration as described above, when the pipe on the heat exchanger side is filled with water instead of hot water (heat exchange temperature is low), even if hot water supply combustion is performed again with hot water, Since it takes time to increase the temperature, the water amount control valve is held in the closed position when the hot water supply is used until the heat exchange temperature reaches a predetermined temperature.
[0014]
Therefore, the hot water flow rate remains small immediately after using the hot water supply, which is inconvenient for the user.
[0015]
In addition, the water amount holding operation as described above is an effective function even in the adjustment operation state in which the gas pressure is adjusted, and the water amount control dedicated to the adjustment operation becomes invalid and affects the performance inspection in the manufacturing process of the bath water heater. It was an effect.
[0016]
The same applies to the automatic pouring operation, and hot water combustion starts when the pouring valve 46 is opened. However, since the pouring flow rate is kept small, the pouring time is longer than the conventional one.
[0017]
If the heat exchanger temperature sensor 43 fails and the heat exchanger temperature cannot be detected, the condition for canceling the water amount holding operation is not satisfied even if the actual heat exchanger temperature rises, and the duration of water amount holding becomes longer. It was inconvenient for the user.
[0018]
In addition, if the water flow control valve circuit becomes uncontrollable due to the biting of foreign matter etc., the water flow control valve will not be operated thereafter, so the water flow holding operation will be continued, which is also inconvenient for the user. It was a thing.
[0019]
[Means for Solving the Problems]
In the bath water heater of the present invention, the heat exchange temperature detecting means for detecting the heat exchange temperature, the fan remaining determining means for determining that the hot water is stopped and the hot water supply fan is left, and the hot water supply fan remaining state immediately after the determination According to the determination result of the heat exchange temperature low temperature determination means for determining the heat exchange temperature, the hot water determination means for determining whether the hot water has been discharged from the stopped state or the hot water supply fan remaining state, and the heat exchange temperature low temperature determination means Water amount control valve closing operation control means for restricting the water amount control valve to a predetermined flow rate, water amount control valve full opening control means for fully opening the water amount control valve, and holding control means for holding the control position of the water amount control valve restricted to the predetermined flow rate when, a normal control means for controlling the amount of water control valve to the indicated flow rate, if it is tapped from the hot water supply fans leaving state, when the determination result is high temperature judgment of the heat exchanger temperature cold determination means, Exchange temperature performs water holding operation for holding the control position of the water control valve is throttled to a predetermined flow rate until it detects a predetermined temperature or more, the low temperature determination comprises sequence control means for performing normal water volume control function as soon as tapping ing.
[0020]
According to the present invention, the heat exchange temperature at the time of leaving the hot water supply fan is determined, and if the heat exchange temperature is low, the water amount control valve is not closed and normal water amount control is performed immediately at the next hot water discharge. It is possible to secure a considerable hot water temperature and hot water flow rate, to eliminate the unpleasant feeling of the small amount of water when using the shower, and to improve usability.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
The first means of the present invention includes a heat exchange temperature detecting means for detecting the heat exchange temperature, a fan remaining determining means for determining that the hot water supply is stopped and the hot water supply fan remaining state, and a hot water supply fan remaining state immediately after the determination. According to the determination result of the heat exchange temperature low temperature determination means for determining the heat exchange temperature, the hot water determination means for determining whether the hot water has been discharged from the stopped state or the hot water supply fan remaining state, and the heat exchange temperature low temperature determination means Water amount control valve closing operation control means for restricting the water amount control valve to a predetermined flow rate, water amount control valve full opening control means for fully opening the water amount control valve, and holding control means for holding the control position of the water amount control valve restricted to the predetermined flow rate when, a normal control means for controlling the amount of water control valve to the indicated flow rate, if it is tapped from the hot water supply fans leaving state, when the determination result is high temperature judgment of the heat exchanger temperature cold determination means may comprise heat exchange temperature Perform water holding operation for holding the control position of the water control valve is throttled to a predetermined flow rate until it detects a predetermined temperature or more, the low temperature determination, which was equipped with a sequence control means for performing normal water volume control function as soon as tapping is there.
[0022]
Further, the second means of the present invention is provided with an adjustment operation switching means for adjusting gas pressure and the like, and an adjustment operation determination means for determining switching of the adjustment operation switching means. It is provided with a sequence control means for canceling the water amount holding operation during operation.
[0023]
Further, the third means of the present invention is provided with a pouring operation determining means for determining an automatic pouring operation, and sequence control for canceling the water amount holding operation during pouring even when the hot water is discharged from the remaining hot water fan state. Means are provided.
[0024]
According to a fourth means of the present invention, there is provided a heat exchange temperature sensor failure detection means, and a sequence control means for immediately canceling the water amount holding operation when a failure of the heat exchange temperature sensor is detected.
[0025]
Further, the fifth means of the present invention includes a water amount control valve failure detecting means, a timer means for counting a predetermined time when the water amount control valve fails, and the water amount control valve is opened only during the predetermined time of the timer means. Open operation means for instructing the operation, and provided with an improved operation sequence control means for driving the water amount control valve in the “open” direction for a predetermined time to ensure the hot water flow rate when the water amount control valve fails.
[0026]
According to the first means of the present invention, when the temperature of the heat exchanger is lower than the predetermined temperature, the water amount control valve is fully opened, and the normal water amount control is performed immediately without performing the water amount holding operation when the hot water is discharged again. Can do.
[0027]
In addition, when the operation mode is switched to the adjustment operation state by the second means of the present invention, the holding operation of the water amount control is immediately released, so that the exclusive water amount control operation in the manufacturing process can be performed.
[0028]
Further, when the start of the pouring operation is determined by the third means of the present invention, the water amount holding operation is immediately canceled, so that it is possible to perform water amount control using the normal calculated value as the target water amount.
[0029]
Further, according to the fourth means of the present invention, when the heat exchange temperature cannot be normally detected due to the failure of the heat exchange temperature sensor, the normal water amount control can be immediately performed.
[0030]
Further, when the fifth means of the present invention detects that the water amount control valve cannot be controlled normally, the water amount control valve is driven in the “open” direction for a predetermined time, so that a large tapping flow rate can be secured.
[0031]
An embodiment of claim 1 of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a bath water heater according to an embodiment of the present invention. 1 is a remote control, 2 is a bath water heater, 3 is a bathtub, 4 is a hot water combustion block, 5 is a bath combustion block, 6 is a flow sensor, 7 is a hot water heat exchanger, 8 is a heat exchange side pipe, and 9 is a bypass side pipe. 10 is a heat exchanger temperature sensor, 11 is a tapping temperature sensor, 12 is a bypass proportional valve, 13 is a water amount control valve, 14 is a pouring valve, 15 is a bath heat exchanger, 16 is piping, 17 is a bath water heater 2 It is a control device that controls the whole.
[0032]
Briefly describing the operation, hot water combustion starts by the hot water combustion block 4 when the amount of water is detected by the flow sensor 6. When hot water combustion starts, the hot water temperature in the heat exchange side pipe 8 is detected by the heat exchange temperature sensor 10, and the hot water supply combustion block 4 is proportionally combusted so that the heat exchange temperature becomes a predetermined temperature.
[0033]
The amount of water in the bypass side pipe 9 is proportionally controlled by the bypass proportional valve 12 so that the hot water temperature detected by the hot water temperature sensor 11 becomes the set temperature set by the remote controller 1.
[0034]
The total flow rate is controlled by the water amount control valve 13, and a predetermined temperature and flow rate are discharged from the faucet.
[0035]
The above operation is the same when the pouring valve 14 is opened and the pouring operation is performed. The hot water temperature set by the remote controller 1 passes through the bath heat exchanger 15 and passes through the piping 16 to the bathtub 3. It is poured automatically.
[0036]
Here, the operation of claim 1 of the present invention when the hot water is discharged from the remaining hot water supply fan will be described with reference to the drawings.
[0037]
In FIG. 2, 18 is a heat exchange temperature sensor, 19 is a flow rate sensor, 20 is a heat exchange temperature detection means, 21 is a heat exchange temperature low temperature determination means, 22 is a fan remaining determination means, 23 is a tapping hot water determination means, and 24 is an amount of water. The control valve closing control means, 25 is a water amount control valve full opening control means, 26 is a release temperature detecting means, 27 is a holding control means, 28 is a normal control means, and 29 is a water amount control valve.
[0038]
In operation, when a faucet (not shown) or the like is closed during hot water combustion and the flow rate sensor 19 detects the amount of fire extinguishing water, the fan remaining determining means 22 determines this and sets the hot water supply fan remaining state.
[0039]
Simultaneously with the determination of the hot water supply fan remaining in the remaining fan determination means 22, the temperature of the heat exchange temperature sensor 18 is detected by the heat exchange temperature detection means 20, and the heat exchange temperature decrease determination means 21 detects the heat exchange temperature below a predetermined temperature T _0. Determine whether or not.
[0040]
When the heat exchange temperature low temperature determination means 21 determines that the signal H has a heat exchange temperature exceeding the predetermined temperature T ₀ , the water amount control valve 29 is throttled to a predetermined flow rate by the water amount control valve closing operation control means 24, and the hot water supply fan remaining period Hold that state.
[0041]
Next, when the heat exchange temperature low temperature determination means 21 determines the signal L that the heat exchange temperature is equal to or lower than the predetermined temperature T ₀ , the water amount control valve 29 is opened to the fully open position by the water amount control valve full open control means 25 and the hot water supply fan remains. Hold that state for a period of time.
[0042]
As described above, the case where the water amount control valve 29 is throttled and the case where the water amount control valve 29 is opened are discriminated based on the heat exchange temperature, and the next hot water is waited.
[0043]
Next, when the flow rate sensor 19 detects the amount of ignition water and the hot water determination means 23 determines that there is hot water remaining in the fan, the following water amount control is performed.
[0044]
First when the heat exchanger temperature cold determination unit 21 determines the signal H, the heat exchanger temperature by the release temperature detection means 26 determines whether the predetermined temperature above T _1. While the release temperature detecting means 26 is detecting the heat exchange temperature below the predetermined temperature T ₁ , the control position throttled by the water amount control valve closing control means 24 is held by the holding control means 27 so as not to increase the tapping flow rate. .
[0045]
When the release temperature detection means 26 detects a temperature equal to or higher than the predetermined temperature T ₁ of the heat exchange temperature, the normal control means 28 switches from the state in which the water amount control valve 29 is throttled to the normal control state, and the water amount control is performed.
[0046]
Next, when the heat exchanger temperature low temperature determination means 21 determines the signal L, the water amount control valve 29 is brought into a normal state by the normal control means 28 simultaneously with the hot water, and the water amount is controlled. A schematic flowchart of the contents of the above operation is shown in FIG.
[0047]
As described above, when the heat exchange temperature is lower than the predetermined temperature T ₁ in advance, normal water amount control can be performed immediately at the time of hot water without closing the water amount control valve.
[0048]
In addition, although the determination temperature has been described as the heat exchange temperature (absolute value) above, it can be determined as a deviation temperature (relative value). This means that when a microcomputer is installed, a dedicated circuit is added or changed as an external circuit. It can be easily realized by changing the program configuration.
[0049]
Next, a second embodiment of the present invention will be described with reference to the drawings. In the description, the same contents as those of the embodiment of claim 1 are omitted and different points will be described.
[0050]
FIG. 4 is a block diagram relating to the control of the amount of water when the hot water is discharged while the hot water supply fan remains in the embodiment of the second means of the present invention. In FIG. 4, 30 is an adjustment operation switching means, 31 is an adjustment operation determining means, and 32 is an adjustment dedicated control means.
[0051]
The operation will be described when the hot water is discharged while the hot water supply fan remains. When the hot water is discharged, the position of the water amount control valve 29 squeezed by the closing control means 24 is held by the holding control means 27 and is continued until the release temperature detecting means 26 determines a predetermined temperature T ₁ or more.
[0052]
During this time, when the adjustment operation switching unit 30 switches from the normal combustion state to the combustion state for the adjustment operation, the adjustment operation determination unit 31 determines this and transmits it to the holding control unit 27 and the adjustment dedicated control unit 32. The holding control means 27 releases the holding operation of the water amount control valve 29 simultaneously with the switching of the adjustment operation.
[0053]
Then, the adjustment dedicated control means 32 controls the amount of water exclusively for the adjustment operation (for example, the adjustment operation “1” is a state in which the pressure during the minimum combustion is adjusted, and the water amount control is controlled to a minimum flow rate, for example, 6 L / min). I do. FIG. 5 shows a schematic flowchart of the contents of the above operation.
[0054]
By switching the adjustment operation as described above, the water amount control by the water amount control valve can be switched to the water amount control dedicated to the immediate adjustment operation even during the water amount control holding operation.
[0055]
Next, a third embodiment of the present invention will be described with reference to the drawings. In the description, the same contents as in the embodiment of claim 1 are omitted and only different points will be described.
[0056]
FIG. 6 is a block diagram relating to the control of the amount of water when the hot water is discharged while the hot water supply fan remains in the embodiment of the third means of the present invention. In FIG. 6, 33 is a remote controller, and 34 is a pouring operation determining means.
[0057]
The operation will be described when an automatic hot water switch (not shown) in the remote controller 33 is operated while the hot water supply fan is left.
[0058]
As described in the embodiment of the second means of the present invention, the water amount control valve 29 is throttled to a predetermined amount by the closing control means 24 and is waiting for detection of the predetermined temperature T ₁ by the release temperature detecting means 26. .
[0059]
At this time, when the automatic hot water switch is turned on, a pouring valve (not shown) is opened to start automatic pouring and hot water combustion starts.
[0060]
On the other hand, when the pouring operation determination unit 34 determines that the automatic hot water switch is turned on, the determination result is transmitted to the holding control unit 27 and the normal control unit 28, and the holding control unit 27 cancels the holding operation of the water amount control valve 29. . Then, normal water amount control (for example, 18 L / min control) is performed by the normal control means 28.
[0061]
A schematic flowchart of the contents of the above operation is shown in FIG.
Next, a fourth embodiment of the present invention will be described with reference to the drawings. In the description, the same contents as in the embodiment of claim 1 are omitted and only different points will be described.
[0062]
FIG. 8 is a block diagram relating to the control of the amount of water at the time of hot water leaving the hot water supply fan of the embodiment of the fourth means of the present invention. In FIG. 8, 35 is a heat exchange temperature abnormality determination means.
[0063]
The operation will be described when the hot water is discharged while the hot water supply fan remains. When the hot water is discharged, the position of the water amount control valve 29 squeezed by the closing control means 24 is held by the holding control means 27 and is continued until the release temperature detecting means 26 determines a predetermined temperature T ₁ or more.
[0064]
During this time, if the heat exchange temperature abnormality determination means 35 detects a heat exchange temperature abnormality (high temperature side abnormality or low temperature side abnormality), the result is transmitted to the holding control means 27 and the normal control means 28. The holding control means 27 detects the abnormality of the heat exchange temperature and simultaneously releases the holding operation of the water amount control valve 29.
[0065]
Then, normal water amount control (for example, control to 24 L / min) is performed by the normal control means 28. FIG. 9 shows a schematic flowchart of the contents of the above operation.
[0066]
Next, a fifth embodiment of the present invention will be described with reference to the drawings. In the description, the same contents as in the embodiment of claim 1 are omitted and only different points will be described.
[0067]
FIG. 10 is a block diagram relating to the control of the amount of water when the hot water is discharged while the hot water supply fan remains in the embodiment of the fifth means of the present invention. In FIG. 10, 36 is a failure detecting means for detecting a control failure of the water amount control valve 29, 37 is a timer means for counting a predetermined time t ₀ , and 38 is the “water amount control valve 29 during the counting of the timer means 37”. Open control means for driving and controlling in the “open direction”.
[0068]
The operation is constantly monitored by the failure detection means 36 while the water control valve 29 is closed or opened by the closing control means 24 or the full opening control means 25 from when the hot water supply fan is left.
[0069]
Similarly, when the normal control means 28 opens and closes when the hot water is discharged, the failure detection means 36 always monitors the failure.
[0070]
Here, if the failure detection means 36 detects a failure in the control of the water amount control valve 29 during the closing drive by the closing control means 24, when hot water is discharged while leaving the hot water supply fan, combustion starts and the heat exchange temperature. There rises, releasing temperature determining means 26 detects the _one or more predetermined temperature T, even attempts to switch the water amount control valve 29 to the normal water volume control, already water control valve 29 is in the fault detected state, to drive Can not be done, the amount of water remains throttled.
[0071]
Therefore, the predetermined time t ₀ is set in the timer means 37 that counts the predetermined time t ₀ simultaneously with the failure detection of the failure detection means 36, and the water control valve 29 is again driven in the “opening direction” by the opening control means 38. Let
[0072]
Then, when the count of the predetermined time t ₀ of the timer unit 37 is completed, the driving of the water amount control valve 29 is stopped by the opening control unit 38.
[0073]
【The invention's effect】
According to the first means of the present invention, the heat exchange temperature at the time when the hot water supply fan remains is determined, and if the heat exchange temperature is low, the water amount control valve is not closed and the normal water amount control is performed immediately at the next hot water discharge. The hot water temperature corresponding to the set temperature and the hot water flow rate can be secured, and the discomfort caused by the small amount of water when using the shower can be eradicated and the usability can be improved.
[0074]
Further, when the operation is switched to the adjustment operation by the second means of the present invention, the water amount is controlled during the immediate adjustment operation, so that the water amount can be confirmed without any trouble in the performance inspection during the assembly of the hot water heater.
[0075]
Further, if the pouring operation is performed by the third means of the present invention, the normal water amount control is immediately performed. Therefore, the automatic pouring can be performed without increasing the automatic pouring time, and the usability can be improved.
[0076]
Further, when a failure of the heat exchanger temperature sensor, detection circuit, or the like is detected by the fourth means of the present invention, normal water amount control is immediately performed, so that the amount of discharged hot water can be secured and the usability when using hot water is improved. be able to.
[0077]
In addition, when the water amount control valve detects a malfunction in the control due to the biting of dust etc. by the fifth means of the present invention, the water amount control valve is driven again in the opening direction for a predetermined time, so that the flow rate at the time of tapping can be secured, so that it is easy to use. Can be improved.
[Brief description of the drawings]
FIG. 1 is a block diagram of a bath water heater according to an embodiment of the present invention. FIG. 2 is a block diagram of a bath water heater according to an embodiment of the present invention. FIG. 3 is a flowchart of the bath water heater. 4 is a block diagram of the water heater according to the second embodiment of the present invention. FIG. 5 is a flow chart of the water heater according to the third embodiment of the present invention. Block diagram [Fig. 7] Flow chart of the bath water heater [Fig. 8] Block diagram of the bath water heater of the embodiment according to claim 4 of the present invention [Fig. 9] Flow chart of the bath water heater [Fig. Fig. 11 is a block diagram of the bath water heater of the embodiment according to claim 5 of the present invention. Fig. 11 is a flowchart of the bath water heater. Fig. 12 is a block diagram of a conventional gas bath water heater. Fig. 13 is a diagram illustrating the operation of the water heater. Block diagram [Figure 14] Operation procedure of the water heater Flowchart [Description of the code] shown
2 Bath Water Heater 6 Flow Sensor 7 Hot Water Heat Exchanger 8 Heat Exchange Side Piping 10 Heat Exchange Temperature Sensor 11 Hot Water Temperature Sensor 13 Water Flow Control Valve 14 Water Injection Valve 15 Bath Heat Exchanger 17 Control Means

Claims

A heat exchange temperature detecting means for detecting the heat exchange temperature, a fan remaining judging means for judging that the hot water supply is stopped and the hot water supply fan is left, and a heat exchange temperature for judging the heat exchange temperature immediately after the hot water supply fan remaining state is judged. Low temperature determination means, hot water determination means for determining whether the hot water has been discharged from the stopped state or hot water supply fan remaining state, and the amount of water to throttle the water amount control valve to a predetermined flow rate according to the determination result of the heat exchanger temperature low temperature determination means The control valve closing operation control means and the water quantity control valve full open control means for fully opening the water quantity control valve, the holding control means for holding the control position of the water quantity control valve throttled to a predetermined flow rate, and the water quantity control to the instructed flow rate and a normal control means for controlling the valve, if it is tapped from the hot water supply fans leaving state, when the determination result is high temperature judgment of the heat exchanger temperature cold determination means, heat exchange temperature is to detect the predetermined temperature or more Until subjected to water holding operation for holding the control position of the squeezed water control valve in a predetermined flow rate, at the time of low temperature determination, bath water heater equipped with a sequence control means for performing normal water volume control operation at the same time as hot water.

An adjustment operation switching means for adjusting gas pressure and the like and an adjustment operation determination means for determining switching of the adjustment operation switching means are provided. The bath water heater according to claim 1, further comprising a sequence control means for releasing.

The hot water supply apparatus according to claim 1, further comprising a sequence control means for canceling the holding operation of the amount of water when pouring is performed even when the hot water is discharged from the state where the hot water supply fan is left. vessel.

The bath water heater according to claim 1, further comprising a sequence control unit that includes a heat exchange temperature sensor failure detection unit, and releases a water amount holding operation when the heat exchange temperature sensor fails.

A water amount control valve, a water amount control valve failure detecting means for detecting a failure of the water amount control valve, a timer means for counting a predetermined time when the water amount control valve fails, and the water amount control valve only during counting of the timer means. An opening operation means for instructing to operate in the “opening direction”, and an improved operation sequence control means for driving the water amount control valve in the “opening” direction for a predetermined time to ensure a discharged water flow rate when detecting a failure of the water amount control valve The bath water heater according to claim 1, comprising: