JP3724279B2

JP3724279B2 - Sanitary washing device

Info

Publication number: JP3724279B2
Application number: JP29126599A
Authority: JP
Inventors: 秀文光長; 謙一岩橋; 良祐林; 博之松下; 康一郎松下; 義和牛島; 直樹飴谷
Original assignee: 東陶機器株式会社
Priority date: 1999-10-13
Filing date: 1999-10-13
Publication date: 2005-12-07
Anticipated expiration: 2019-10-13
Also published as: JP2001107431A

Description

【０００１】
【発明の属する技術分野】
本発明は、流量制限装置が備えられた衛生洗浄装置に係り、温水を所望の温度になるようにせしめる衛生洗浄装置に関する。
【０００２】
【従来の技術】
従来のこの種の衛生洗浄装置の加熱量制御装置の例を図３に示す。
図３において、洗浄水を供給する給水配管５１には、上流側から順に、定流量弁５２、電磁弁５３、熱交換器５４が接続されている。熱交換器５４の出口部には、バキュームブレーカ５５が接続されている。バキュームブレーカ５５の下流は二方に分岐し、一方は余剰の水を便器内に直接捨てるための捨水配管５６へ、他方は流路切替兼流量調整弁５７へ接続されている。流路切替兼流量調整弁５７の下流は二方に分岐し、一方は捨水路５８へ、他方は流路切替弁５９を介して洗浄水を人体へ噴出するノズル装置６０へ接続されている。なおこの例では、流路切替弁５９はノズル装置６０内に一体的に構成されている。
また、熱交換器５４内には温水ヒータ６１が、また熱交換器５４の出水部には、それぞれ温水サーミスタ６２が設けてある。また、捨水路５８の排水先は、ノズル装置６０の胴体を洗浄できる位置にしている。また、ノズル装置６０には、おしり流路６３、やわらか流路６４、ビデ流路６５の３つの流路が構成されている。なお上記各部の制御は、制御器６６によって行われ、制御器６６には温度設定装置６６より洗浄水の温度設定値が指示される。
本実施例では、熱交換器５４内にはフロートスイッチ６７を設けてある。フロートスイッチ６７は、所定の水位を検知していない時には、温水ヒータ６１への通電を行わないようにすることで空焚きを防ぐためのものである。
【０００３】
上記の構成により、電磁弁５３の開動作により給水配管５１から供給された洗浄水は、熱交換器５４により適温の湯に加熱され、バキュームブレーカ５５を押し上げ、流路切替兼流量調整弁５７へと至る。ここで洗浄水は、流路切替兼流量調整弁５７により流量調節され、流路切替弁５９へと至り、流路切替弁５９により選択された流路を通り、ノズル装置６０から噴出されるのである。
上記の構成によれば、洗浄水の加熱を行うのは着座を検知しているときのみであるため、非使用時の待機電力の消費が少なくて済み、常時タンク内に湯を保温させる貯湯タイプの人体洗浄装置に比べて、大幅な節電を図ることが可能となっている。
【０００４】
【発明が解決しようとする課題】
しかしながら、従来の制御装置では、加熱制御の開始や流量の変化後や設定温度の変更後、熱交後の給湯温度と設定温度の偏差が大きくなった場合に、フィードバック制御にて、給湯温度が設定温度に近づく様に制御していたので、むだ時間や一時遅れにより給湯温度が設定温度になるまでに時間がかかったり、またフィードバック量が大きすぎて温水温度が設定温度を超えてしまう事があり、その温水を衛生洗浄水として使用すると長い時間温水が設定温にならないので使用者に不快感を与えてしまう問題があった。
【０００５】
本発明は、上記課題を解決するためになされたもので、本発明の目的は、加熱制御の開始や流量の変化後や設定温度の変更後、早く給湯温度を設定温度に近づける事を可能にする衛生洗浄装置を提供することにある。
【０００６】
【課題を解決するための手段】
上記目的を達成するために請求項１においては、加熱装置と、被加熱物の流量を制限する流量制限装置と、前記加熱装置により加熱される前の温度を検出する加熱前温度検知手段と、前記加熱装置により加熱された後の温度を検出する加熱後温度検知手段と被加熱物の温度を設定する温度設定手段と、前記加熱装置への加熱量を演算する演算装置からなり、前記加熱前温度検知手段より得た被加熱物の加熱前温度及び前記温度設定手段からの設定温度と、前記流量制限装置が制限している流量を元に、被加熱物が設定温度になるのに必要な加熱量を演算する衛生洗浄装置において、前記演算装置は、前記加熱後温度と前記設定温度の偏差の積分結果による温度補正演算を行う積分補正演算手段を備え、積分補正演算による積分補正量が所定値以上であれば前記積分補正演算手段の加熱量を上げる側への補正をしないようにした。これにより、流量制限装置による制限流量が大きくなり加熱装置の加熱能力が給湯温度を設定温度にする必要加熱量を下回ると定常的に加熱後温度と設定温度に温度差が発生する。これに積分補正演算による積分補正を行い続けると補正量が溜まってしまい、その後に流量制限による制限流量が小さくなった時に過剰に積分補正をしている結果となり加熱後温度が設定温度よりも高温となるため使用者に不快感を与えるが、積分補正演算による積分補正量が所定値以上であれば前記積分補正演算手段の加熱量を上げる側への補正をしないようにしているため積分補正値が過剰とならず使用者に不快感を与えることを防ぐことができる。
【００１２】
また、請求項２においては、加熱装置と、被加熱物の流量を制限する流量制限装置と、前記加熱装置により加熱される前の温度を検出する加熱前温度検知手段と、前記加熱装置により加熱された後の温度を検出する加熱後温度検知手段と被加熱物の温度を設定する温度設定手段と、前記加熱装置への加熱量を演算する演算装置からなり、前記加熱前温度検知手段より得た被加熱物の加熱前温度及び前記温度設定手段からの設定温度と、前記流量制限装置が制限している流量を元に、被加熱物が設定温度になるのに必要な加熱量を演算する衛生洗浄装置において、前記演算装置は、前記加熱後温度と前記設定温度の偏差の積分結果による温度補正演算を行う積分補正演算手段を備え、積分補正演算による積分補正量と、前記加熱前温度検知手段より得た被加熱物の加熱前温度及び前記温度設定手段からの設定温度と前記流量制限装置が制御している流量を元に、被加熱物が設定温度になるのに必要な加熱量との加算値が、所定値以上であれば前記積分補正演算手段の加熱量を上げる側への補正をしないようにした。これにより、流量制限装置による制限流量が大きくなり加熱装置の加熱能力が加熱後温度を設定温度にする必要加熱量を下回ると定常的に給湯温度と設定温度に温度差が発生する。これに積分補正演算による積分補正を行い続けると補正量が溜まってしまい、その後に流量制限による制限流量が小さくなった時に過剰に積分補正をしている結果となり加熱後温度が設定温度よりも高温となるため使用者に不快感を与えるが、積分補正演算による積分補正量と、加熱前温度検知手段より得た被加熱物の加熱前温度及び温度設定手段からの設定温度と流量制御装置が制御している流量を元に被加熱物が設定温度になるのに必要な加熱量との加算値が所定値以上であれば前記積分補正演算手段の加熱量を上げる側への補正をしないようにし、例えば所定値を加熱装置の加熱能力に設定しておけば積分補正値が適正補正量に近い値であるため、加熱後温度が高温とならず使用者に不快感を与えることを防ぐことができる。
【００１３】
【発明の実施の形態】
本発明の内容をより理解するため、以下に実施例を用いて詳説する。
【００１４】
【実施例】
本発明の一実施例を示す人体洗浄装置を図１に示す。
ここで図１は、洗浄水の供給系を示す概略構成図である。図１において、洗浄水を供給する給水配管１１には、上流側から順に、定流量弁１２、電磁弁１３、熱交換器１４が接続されている。熱交換器１４の出口部には、バキュームブレーカ１５が接続されている。バキュームブレーカ１５の下流は二方に分岐し、一方は余剰の水を便器内に直接捨てるための捨水配管１６へ、他方は脈動発生装置１７へ接続されている。脈動発生装置１７の下流には、流路切替兼流量調整弁１８が接続されている。流路切替兼流量調整弁１８の下流は二方に分岐し、一方は捨水路１９へ、他方は流路切替弁２０を介して洗浄水を人体へ噴出するノズル装置２１へ接続されている。なおこの例では、流路切替弁２０はノズル装置２１内に一体的に構成されている。
また、熱交換器１４内には温水ヒータ２２が、また熱交換器１４の入水部と出水部には、それぞれ冷水サーミスタ２３及び温水サーミスタ２４が設けてある。また、捨水路１９の排水先は、ノズル装置２１の胴体を洗浄できる位置にしている。また、ノズル装置２１には、おしり流路２５、やわらか流路２６、ビデ流路２７の３つの流路が構成されている。なお上記各部の制御は、制御器２８によって行われ、制御器２８には温度設定装置３２より洗浄水の温度設定値が指示される。
【００１５】
本実施例では、脈動発生装置１７の上流にアキュームレータ２９を、熱交換器１４内にはフロートスイッチ３０を、また、脈動発生装置１７には温度ヒューズ３１を設けてある。アキュームレータ２９は、脈動発生装置１７で発生した脈動が上流へ伝播するのを防ぐためのものであり、フロートスイッチ３０は、所定の水位を検知していない時には、温水ヒータ２２への通電を行わないようにすることで空焚きを防ぐためのものであり、また、温度ヒューズ３１は、脈動発生装置１７の異常温度上昇時に駆動を停止し、安全を図るためのものである。
上記の構成により、電磁弁１３の開動作により給水配管１１から供給された洗浄水は、熱交換器１４により適温の湯に加熱され、バキュームブレーカ１５を押し上げ、脈動発生装置１７により脈動を付与され、流路切替兼流量調整弁１８へと至る。ここで洗浄水は、流路切替兼流量調整弁１８により流量制限され、流路切替弁２０へと至り、流路切替弁２０により選択された流路を通り、ノズル装置２１から噴出されるのである。
【００１６】
制御器２８は、電磁弁１３の開動作により加熱量制御を開始する。その際、冷水サーミスタ２３から得た冷水温度ＴＣ、温水サーミスタ２４から得た温水温度ＴＭ、温度設定装置３２から得た設定温度ＴＳと水量制御装置１３への水量制限量Ｑを元に、

を演算する。
【００１７】
（１）式は、水量制限量Ｑが流れた時の、冷水温度ＴＣを設定温度ＴＳに上昇させるに必要な熱量である。
（２）式は、給湯温度ＴＭを設定温度ＴＳ±δＴｈにするためにの熱量補正量で、ＴＳからδＴｈ離れた温度とＴＭの偏差と比例ゲインＧｐの積である比例項である。
（３）式は、ＴＳとＴＭの偏差の積分量と積分ゲインＧｉの積である積分項との加算値とした。
【００１８】
電磁弁１３の開動作により加熱量制御が開始されたら、
Ｗ＝ＷＦＦ１＋ＷＦＢ２＋ＷＦＢ３
に相当する通電量を温水ヒータ２２に印加する。（１）式の水量制限量Ｑは、実際に流れている流量でなく定流量弁１２の開度により決まる制限流量である。従って、本来必要な加熱量と一致しない場合もあるが、ほぼ近い値となるはずである。また、給湯温度ＴＭと設定温度ＴＳの偏差によるフィードバック制御のみでは、水量制限量Ｑを変更した場合が加熱量制御に遅れるため給湯温度が設定温度から大きく外れてしまう。
【００１９】
そこで、水量制限量ＱとＴＳとＴＣにより、実際の必要熱量に近いＷＦＦ１値を加熱量とすることで、水量制限量を変更した時の給湯温度の変動が押さえられる。元水圧が下がれば実際の流量は減少しその場合は熱量過大となる。また、温水ヒータの熱交換率が悪くなれば熱量不足となる。この熱量過不足を補正するため（２）式のＷＦＢ２と（３）式のＷＦＢ３を熱量補正量とした。（２）式の比例項は設定温度に対し上下に比例項の効かない不感帯を設けてあり、多少の必要熱量の変動に対しては比例項を効かせないようにした。比例項ＷＦＢ２を給湯温度ＴＭの急変に対して追従可能にさせ、積分項ＷＦＢ３にて適正な熱量補正量に近づけていく役割としたので、多少の水量の減少等には給湯温度の変動を押さえられるて熱量の補正が可能となる。
【００２０】
しかしながら、給水を別の器具で使用された場合、元水圧に急激な減少がおきる場合がある。その場合は、ＷＦＢ２＋ＷＦＢ３による温度補正が間に合わず給湯温度は高温となってしまう。従って、給湯温度ＴＭが設定温度ＴＳの最大値４０℃を超え、４５℃以上となれば温水ヒータ２２への通電を停止する。この際、電磁弁１３は開を継続させる、なぜなら給水がないと温度が下がらないからであり、温水ヒータ２２が通電継続の故障をしているわけでなければ、給湯温度は、４５℃以下に下がるからである。当然、給湯温度が更に上昇して４８℃以上となれば、電磁弁１３を閉して給湯温度が高温となることを回避する。
【００２１】
なお、設定温度を超え４５℃以上の高温になったときに、温水ヒータ２２への通電を停止せず通電量を半減するなどの方法もある、これは温水ヒータ２２への通電を停止するとその後の給湯温度が設定温度よりも下がり過ぎる場合があるからであり、通電量を半減するなどの方法であれば、給湯温度が下がり過ぎることを防ぐことができる。給湯温度が４５℃を超えて温水ヒータ２２への通電を停止している間も、（３）式の積分項ＷＦＢ３は、ＴＳとＴＭとの偏差による積分を継続する、温水ヒータ２２への通電停止をしている間に積分を停止させると、給湯温度が低下し温水ヒータ２２の通電停止が解除となれば、温水ヒータ２２が停止する前の加熱量となるから熱量過大となり再び給湯温度が４５℃の高温となってしまう。従って、給湯温度が４５℃以上を検知したら温水ヒータ２２の通電を停止し、その間も（３）式の積分を継続する。
【００２２】
温水ヒータ２２への通電を停止し、給湯温度が４０℃以下まで下がったら温水ヒータ２２の通電停止を解除し、
通常加熱量Ｗ＝ＷＦＦ１＋ＷＦＢ２＋ＷＦＢ３
に復帰する。復帰した場合でも、給湯温度ＴＭをそのまま下がり続ける、これは
通常加熱量Ｗ＝ＷＦＦ１＋ＷＦＢ２
の通電がすぐに給湯温度に反映されないためである。従って、もし給湯設定温度ＴＳ＝４０℃としていたら、（３）式の積分項は給湯温度ＴＭが給湯設定温度ＴＳを下回ったので加熱量を増加する側に働いてしまう。そこで、給湯温度ＴＭが４０℃以下となり、温水ヒータ２２の停止を解除して給湯温度が
通常加熱量Ｗ＝ＷＦＦ１＋ＷＦＢ２＋ＷＦＢ３
での給湯温度になるまでの時間は、積分項の加熱量を増加させる側への積分を禁止した。これにより、積分項が熱量減少側への熱量補正を維持するので温水ヒータ２２への通電停止後、流量減少による過大熱量の補正が速くなる。
【００２３】
ところで、温水ヒータ２２の加熱能力が必要熱量よりも低い場合がある。例えば給水温度ＴＣが５℃、設定温度ＴＳが４０℃で、水量制限量を最大のＱｍａｘにしている場合、温水ヒータ２２の最大加熱能力Ｗｍａｘが、
Ｗｍａｘ＜Ｑｍａｘ（４０℃−５℃）
となる。すると、給湯温度ＴＭが設定温度ＴＳに達しないので積分項は加熱量を増加する側に補正を続ける。このままにしておくと積分項が大きくなり、
Ｗ＝ＷＦＦ１＋ＷＦＢ２＋ＷＦＢ３＞＞Ｗｍａｘ
となる。
そこで、
積分項ＷＦＢ３≧最大積分量
となるか、もしくは、
Ｗｍａｘ≧ＷＦＦ１＋ＷＦＢ３
となるようなら、積分項ＷＦＢ３を加熱量増大側に増やさないようにした。これにより、
最大加熱能力Ｗｍａｘ＜必要熱量から最大加熱能力Ｗｍａｘ≧必要熱量
となった場合に積分項が大きくなりすぎていないから、必要熱量に対し加熱量が適正となり給湯温度ＴＭの上昇が防げる。元水圧が下がり、実際の水量がＱｍａｘの状態から下がった場合でも同様な事が言える。
【００２４】
【発明の効果】
本発明は上記構成により次の効果を発揮する。
【００２５】
請求項１では、流量制限装置による制限流量が大きくなり加熱装置の加熱能力が給湯温度を設定温度にする必要加熱量を下回ると定常的に加熱後温度と設定温度に温度差が発生する。これに積分補正演算による積分補正を行い続けると補正量が溜まってしまい、その後に流量制限による制限流量が小さくなった時に過剰に積分補正をしている結果となり加熱後温度が設定温度よりも高温となるため使用者に不快感を与えるが、積分補正演算による積分補正量が所定値以上であれば前記積分補正演算手段の加熱量を上げる側への補正をしないようにしているため積分補正値が過剰とならず使用者に不快感を与えることを防ぐ事が可能となる。
【００３１】
請求項２では、流量制限装置による制限流量が大きくなり加熱装置の加熱能力が加熱後温度を設定温度にする必要加熱量を下回ると定常的に給湯温度と設定温度に温度差が発生する。これに積分補正演算による積分補正を行い続けると補正量が溜まってしまい、その後に流量制限による制限流量が小さくなった時に過剰に積分補正をしている結果となり加熱後温度が設定温度よりも高温となるため使用者に不快感を与えるが、積分補正演算による積分補正量と、加熱前温度検知手段より得た被加熱物の加熱前温度及び温度設定手段からの設定温度と流量制御装置が制御している流量を元に被加熱物が設定温度になるのに必要な加熱量との加算値が所定値以上であれば前記積分補正演算手段の加熱量を上げる側への補正をしないようにし、例えば所定値を加熱装置の加熱能力に設定しておけば積分補正値が適正補正量に近い値であるため、加熱後温度が高温とならず使用者に不快感を与えることを防ぐ事が可能となる。
【図面の簡単な説明】
【図１】本発明の一実施例を示す人体洗浄装置の概略構成図
【図２】従来の人体洗浄装置の概略構成図
【符号の説明】
１１…給水配管、１２…定流量弁、１３…電磁弁、１４…熱交換器、
１５…バキュームブレーカ、１６…捨水配管、１７…脈動発生装置、
１８…流路切替兼流量調整弁、１９…捨水路、２０…流路切替弁、
２１…ノズル装置、２２…温水ヒータ、２３…冷水サーミスタ、
２４…温水サーミスタ、２５…おしり流路、２６…やわらか流路、
２７…ビデ流路、２８…制御器、２９…アキュームレータ、
３０…フロートスイッチ、３１…温度ヒューズ、３２…温度設定装置、
５１…給水配管、５２…定流量弁、５３…電磁弁、５４…熱交換器
５５…バキュームブレーカ、５６…捨水配管、
５７…流路切替兼流量調整弁、５８…捨水路、５９…流路切替弁、
６０…ノズル装置、６１…温水ヒータ、６２…温水サーミスタ、
６３…おしり流路、６４…やわらか流路、６５…ビデ流路、
６６…制御器、６７…フロートスイッチ、６８…温度設定装置[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sanitary washing equipment the flow restriction device is provided, about the sanitary washing equipment which allowed to so the hot water to a desired temperature.
[0002]
[Prior art]
An example of a conventional heating amount control device for this type of sanitary washing apparatus is shown in FIG.
In FIG. 3, a constant flow valve 52, an electromagnetic valve 53, and a heat exchanger 54 are connected in order from the upstream side to a water supply pipe 51 that supplies cleaning water. A vacuum breaker 55 is connected to the outlet of the heat exchanger 54. The downstream of the vacuum breaker 55 branches in two directions, one being connected to a drainage pipe 56 for directly discarding excess water into the toilet bowl, and the other connected to a flow path switching / flow rate adjusting valve 57. The downstream of the flow path switching / flow rate adjusting valve 57 branches in two directions, one being connected to the drainage path 58 and the other being connected to the nozzle device 60 for ejecting the wash water to the human body via the flow path switching valve 59. In this example, the flow path switching valve 59 is integrally formed in the nozzle device 60.
Further, a hot water heater 61 is provided in the heat exchanger 54, and a hot water thermistor 62 is provided in the water discharge portion of the heat exchanger 54. Further, the drainage destination of the drainage channel 58 is at a position where the body of the nozzle device 60 can be cleaned. Further, the nozzle device 60 is configured with three channels, a buttocks channel 63, a soft channel 64, and a bidet channel 65. The control of each part is performed by the controller 66, and the controller 66 is instructed by the temperature setting device 66 to set the temperature of the cleaning water.
In the present embodiment, a float switch 67 is provided in the heat exchanger 54. The float switch 67 is for preventing the hot water heater 61 from being energized by not energizing the hot water heater 61 when a predetermined water level is not detected.
[0003]
With the above configuration, the wash water supplied from the water supply pipe 51 by the opening operation of the electromagnetic valve 53 is heated to an appropriate temperature by the heat exchanger 54, pushes up the vacuum breaker 55, and goes to the flow path switching / flow rate adjustment valve 57. And so on. Here, the flow of the washing water is adjusted by the flow path switching / flow rate adjusting valve 57, reaches the flow path switching valve 59, passes through the flow path selected by the flow path switching valve 59, and is ejected from the nozzle device 60. is there.
According to the above configuration, since the cleaning water is heated only when seating is detected, the standby power consumption when not in use is small, and the hot water storage type that keeps hot water in the tank at all times Compared with the human body washing apparatus, it is possible to save a large amount of power.
[0004]
[Problems to be solved by the invention]
However, in the conventional control device, when the deviation between the hot water supply temperature after heat exchange and the set temperature becomes large after the start of heating control, the change of flow rate or the change of the set temperature, the hot water temperature is set by feedback control. Since the temperature was controlled so as to approach the set temperature, it might take time for the hot water supply temperature to reach the set temperature due to dead time or a temporary delay, or the amount of feedback may be too large and the hot water temperature may exceed the set temperature. There is a problem in that when the hot water is used as sanitary washing water, the hot water does not reach the set temperature for a long time, and the user is uncomfortable.
[0005]
The present invention has been made to solve the above-described problems, and an object of the present invention is to allow the hot water supply temperature to approach the set temperature quickly after the start of heating control, the change in flow rate, or the change in the set temperature. It is to provide a sanitary washing equipment to.
[0006]
[Means for Solving the Problems]
In claim 1 In order to achieve the above object, a heating device, a flow restricting device for restricting the flow rate of the heated object, and before heating temperature detecting means for detecting the temperature before being heated by the heating device, a temperature setting means for setting the temperature of the heating after the temperature sensing means and the heated object for detecting the temperature after being heated by the heating device, Ri Do from the arithmetic unit for calculating the amount of heat to the heating device, said heating Necessary for the heated object to reach the set temperature based on the pre-heating temperature of the heated object obtained from the previous temperature detecting means, the set temperature from the temperature setting means, and the flow rate limited by the flow rate limiting device. Oite to Do heating amount sanitary washing equipment for calculating a, the computing device includes an integral correction calculating means for performing a temperature correction calculation by integration result of the deviation of the post-heating temperature and the set temperature, the integral by the integral correction operation Correction amount is a predetermined value And not to the correction to the integral correction calculating means side to increase the heat amount if above. Thereby, when the flow restriction by the flow restriction device becomes large and the heating capacity of the heating device falls below the required heating amount for setting the hot water supply temperature to the set temperature, a temperature difference is constantly generated between the post-heating temperature and the set temperature. If the integral correction by the integral correction calculation is continued, the correction amount will be accumulated, and then the integral correction will be performed excessively when the restricted flow rate due to the flow restriction becomes small, and the post-heating temperature is higher than the set temperature. However, if the integral correction amount by the integral correction calculation is greater than or equal to a predetermined value, the integral correction value is not corrected to increase the heating amount. Can prevent the user from feeling uncomfortable without being excessive.
[0012]
According to a second aspect of the present invention , the heating device, the flow rate limiting device for limiting the flow rate of the object to be heated, the pre-heating temperature detecting means for detecting the temperature before being heated by the heating device, and the heating device for heating. A post-heating temperature detecting means for detecting the temperature after being heated, a temperature setting means for setting the temperature of the object to be heated, and an arithmetic unit for calculating the amount of heating to the heating device, obtained from the pre-heating temperature detecting means. Based on the pre-heating temperature of the heated object, the set temperature from the temperature setting means, and the flow rate limited by the flow rate limiting device, the heating amount required for the heated object to reach the set temperature is calculated. in the sanitary washing device, the computing device includes an integral correction calculating means for performing a temperature correction calculation by integration result of the deviation of the post-heating temperature and the set temperature, the integral correction amount by the integral correction operation, the preheating temperature sensing means Based on the preheated temperature of the heated object obtained and the set temperature from the temperature setting means and the flow rate controlled by the flow rate limiting device, the heating amount necessary for the heated object to reach the set temperature If the added value is equal to or greater than a predetermined value, the integral correction calculating means is not corrected to increase the heating amount. Thereby, when the flow restriction by the flow restriction device increases and the heating capacity of the heating device falls below the required heating amount for setting the temperature after heating to the set temperature, a temperature difference is constantly generated between the hot water supply temperature and the set temperature . If the integral correction by the integral correction calculation is continued, the correction amount will be accumulated, and then the integral correction will be performed excessively when the restricted flow rate due to the flow restriction becomes small, and the post-heating temperature is higher than the set temperature. Therefore, the user feels uncomfortable, but the integral correction amount by the integral correction calculation, the preheating temperature of the object to be heated obtained from the preheating temperature detection means, the set temperature from the temperature setting means, and the flow control device are controlled. If the added value with the heating amount required for the heated object to reach the set temperature based on the flow rate is greater than or equal to a predetermined value, the integral correction calculation means should not be corrected to increase the heating amount. For example, if the predetermined value is set as the heating capacity of the heating device, the integral correction value is a value close to the appropriate correction amount, so that the temperature after heating does not become high and prevents the user from feeling uncomfortable. it can.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
In order to better understand the contents of the present invention, detailed description will be given below using examples.
[0014]
【Example】
A human body washing apparatus showing an embodiment of the present invention is shown in FIG.
Here, FIG. 1 is a schematic configuration diagram showing a cleaning water supply system. In FIG. 1, a constant flow valve 12, a solenoid valve 13, and a heat exchanger 14 are connected in order from the upstream side to a water supply pipe 11 that supplies cleaning water. A vacuum breaker 15 is connected to the outlet of the heat exchanger 14. The downstream of the vacuum breaker 15 branches in two directions, one being connected to a drainage pipe 16 for directly discarding excess water in the toilet and the other connected to a pulsation generator 17. A flow path switching / flow rate adjusting valve 18 is connected downstream of the pulsation generator 17. The downstream of the flow path switching / flow rate adjusting valve 18 branches in two directions, one being connected to the drainage path 19 and the other being connected to the nozzle device 21 through the flow path switching valve 20 to eject wash water to the human body. In this example, the flow path switching valve 20 is integrally formed in the nozzle device 21.
Further, a hot water heater 22 is provided in the heat exchanger 14, and a cold water thermistor 23 and a hot water thermistor 24 are provided in a water inlet portion and a water outlet portion of the heat exchanger 14, respectively. Further, the drainage destination of the drainage channel 19 is at a position where the body of the nozzle device 21 can be cleaned. Further, the nozzle device 21 is configured with three channels, a buttocks channel 25, a soft channel 26, and a bidet channel 27. The control of each part is performed by the controller 28, and the controller 28 is instructed by the temperature setting device 32 to set the temperature of the cleaning water.
[0015]
In this embodiment, an accumulator 29 is provided upstream of the pulsation generator 17, a float switch 30 is provided in the heat exchanger 14, and a thermal fuse 31 is provided in the pulsation generator 17. The accumulator 29 is for preventing the pulsation generated by the pulsation generator 17 from propagating upstream, and the float switch 30 does not energize the hot water heater 22 when a predetermined water level is not detected. By doing so, the thermal fuse 31 is for stopping the drive when the abnormal temperature rise of the pulsation generating device 17 and for safety.
With the above configuration, the washing water supplied from the water supply pipe 11 by the opening operation of the electromagnetic valve 13 is heated to an appropriate temperature by the heat exchanger 14, pushes up the vacuum breaker 15, and is pulsated by the pulsation generator 17. To the flow path switching / flow rate adjusting valve 18. Here, the flow rate of the washing water is limited by the flow path switching / flow control valve 18, reaches the flow path switching valve 20, passes through the flow path selected by the flow path switching valve 20, and is ejected from the nozzle device 21. is there.
[0016]
The controller 28 starts the heating amount control by opening the electromagnetic valve 13. At that time, based on the cold water temperature TC obtained from the cold water thermistor 23, the hot water temperature TM obtained from the hot water thermistor 24, the set temperature TS obtained from the temperature setting device 32 and the water amount restriction amount Q to the water amount control device 13,

Is calculated.
[0017]
Equation (1) is the amount of heat required to raise the cold water temperature TC to the set temperature TS when the water amount restriction amount Q flows.
Equation (2) is a heat quantity correction amount for setting the hot water supply temperature TM to the set temperature TS ± δTh, and is a proportional term that is the product of a temperature, a deviation of TM from the TS, a deviation of TM, and a proportional gain Gp.
The expression (3) is an addition value of an integral amount that is a product of an integral amount of deviation between TS and TM and an integral gain Gi.
[0018]
When the heating amount control is started by opening the solenoid valve 13,
W = WFF1 + WFB2 + WFB3
Is applied to the hot water heater 22. The water amount restriction amount Q in the equation (1) is a restriction flow rate determined by the opening degree of the constant flow valve 12, not the actual flow rate. Therefore, the heating amount may not be the same as the originally required amount, but it should be almost similar. Further, only by feedback control based on the deviation between the hot water supply temperature TM and the set temperature TS, the case where the water amount restriction amount Q is changed is delayed from the heating amount control, so that the hot water supply temperature greatly deviates from the set temperature.
[0019]
Therefore, by using the water amount restriction amount Q, TS, and TC as the heating amount, the WFF1 value close to the actual required heat amount is used to suppress fluctuations in the hot water supply temperature when the water amount restriction amount is changed. If the original water pressure decreases, the actual flow rate decreases, and in that case, the amount of heat becomes excessive. Moreover, if the heat exchange rate of the hot water heater is deteriorated, the amount of heat becomes insufficient. In order to correct this excess or deficiency of heat, WFB2 in equation (2) and WFB3 in equation (3) were used as the amount of heat correction. The proportional term in equation (2) has a dead zone where the proportional term does not work up and down with respect to the set temperature, so that the proportional term is not effective for slight fluctuations in required heat. Proportional term WFB2 can follow the sudden change in hot water temperature TM, and the integral term WFB3 has a role to bring it closer to the appropriate amount of heat correction. As a result, the amount of heat can be corrected.
[0020]
However, when the water supply is used with another device, there may be a rapid decrease in the original water pressure. In that case, the temperature correction by WFB2 + WFB3 is not in time, and the hot water supply temperature becomes high. Accordingly, when the hot water supply temperature TM exceeds the maximum value 40 ° C. of the set temperature TS and becomes 45 ° C. or higher, the energization to the hot water heater 22 is stopped. At this time, the solenoid valve 13 is kept open because the temperature does not decrease without water supply, and the hot water heater temperature is 45 ° C. or lower unless the hot water heater 22 is in failure to continue energization. Because it goes down. Naturally, if the hot water supply temperature further rises to 48 ° C. or higher, the solenoid valve 13 is closed to avoid the hot water supply temperature from becoming high.
[0021]
In addition, there is a method such as halving the energization amount without stopping the energization to the hot water heater 22 when the temperature becomes higher than 45 ° C. exceeding the set temperature. This is because there is a case where the hot water supply temperature is too low than the set temperature, and the hot water supply temperature can be prevented from being excessively lowered by a method such as halving the energization amount. The integral term WFB3 in equation (3) continues the integration due to the deviation between TS and TM while the hot water supply temperature exceeds 45 ° C. and the energization to the hot water heater 22 is stopped. If the integration is stopped while the hot water heater 22 is stopped, if the hot water heater temperature decreases and the hot water heater 22 is de-energized, the heating amount is increased before the hot water heater 22 stops. It becomes a high temperature of 45 ° C. Therefore, when the hot water supply temperature is detected to be 45 ° C. or higher, the energization of the hot water heater 22 is stopped, and the integration of the expression (3) is continued during that time.
[0022]
Stop energization of the hot water heater 22 and stop the energization stop of the hot water heater 22 when the hot water supply temperature is lowered to 40 ° C. or lower.
Normal heating amount W = WFF1 + WFB2 + WFB3
Return to. Even when the temperature returns, the hot water supply temperature TM continues to decrease. This is the normal heating amount W = WFF1 + WFB2.
This is because the energization of is not immediately reflected in the hot water supply temperature. Accordingly, if the hot water supply set temperature TS = 40 ° C., the integral term of the equation (3) works to increase the heating amount because the hot water supply temperature TM is lower than the hot water supply set temperature TS. Therefore, the hot water supply temperature TM becomes 40 ° C. or less, the stop of the hot water heater 22 is canceled, and the hot water supply temperature is the normal heating amount W = WFF1 + WFB2 + WFB3.
In the time until the hot water supply temperature is reached, the integration to the side where the heating amount of the integral term is increased is prohibited. Thereby, since the integral term maintains the heat amount correction to the heat amount reduction side, after the energization to the hot water heater 22 is stopped, the correction of the excessive heat amount due to the decrease in the flow rate becomes faster.
[0023]
By the way, the heating capacity of the hot water heater 22 may be lower than the required amount of heat. For example, when the feed water temperature TC is 5 ° C., the set temperature TS is 40 ° C., and the water amount restriction amount is the maximum Qmax, the maximum heating capacity Wmax of the hot water heater 22 is
Wmax <Qmax (40 ° C-5 ° C)
It becomes. Then, since the hot water supply temperature TM does not reach the set temperature TS, the integral term continues to be corrected so as to increase the heating amount. If this is left as it is, the integral term will increase,
W = WFF1 + WFB2 + WFB3 >> Wmax
It becomes.
there,
Integral term WFB3 ≧ maximum integral amount, or
Wmax ≧ WFF1 + WFB3
If so, the integral term WFB3 is not increased to the heating amount increasing side. This
When the maximum heating capacity Wmax <the required heat quantity becomes the maximum heating capacity Wmax ≧ the required heat quantity, the integral term is not excessively large, so that the heating quantity becomes appropriate with respect to the required heat quantity, and the hot water supply temperature TM can be prevented from rising. The same can be said even when the original water pressure is lowered and the actual water amount is lowered from the Qmax state.
[0024]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
[0025]
According to the first aspect of the present invention, when the restriction flow rate by the flow restriction device increases and the heating capacity of the heating device falls below the required heating amount for setting the hot water supply temperature to the set temperature, a temperature difference is constantly generated between the post-heating temperature and the set temperature. If the integral correction by the integral correction calculation is continued, the correction amount will be accumulated, and then the integral correction will be performed excessively when the restricted flow rate due to the flow restriction becomes small, and the post-heating temperature is higher than the set temperature. However, if the integral correction amount by the integral correction calculation is greater than or equal to a predetermined value, the integral correction value is not corrected to increase the heating amount. It is possible to prevent the user from feeling uncomfortable without being excessive.
[0031]
According to the second aspect of the present invention , when the restriction flow rate by the flow restriction device becomes large and the heating capacity of the heating device falls below the required heating amount for setting the temperature after heating to the set temperature, a temperature difference is constantly generated between the hot water supply temperature and the set temperature . If the integral correction by the integral correction calculation is continued, the correction amount will be accumulated, and then the integral correction will be performed excessively when the restricted flow rate due to the flow restriction becomes small, and the post-heating temperature is higher than the set temperature. Therefore, the user feels uncomfortable, but the integral correction amount by the integral correction calculation, the preheating temperature of the object to be heated obtained from the preheating temperature detection means, the set temperature from the temperature setting means, and the flow control device are controlled. If the added value with the heating amount required for the heated object to reach the set temperature based on the flow rate is greater than or equal to a predetermined value, the integral correction calculation means should not be corrected to increase the heating amount. For example, if the predetermined value is set as the heating capacity of the heating device, the integral correction value is a value close to the appropriate correction amount, so that the temperature after heating does not become high and prevents the user from feeling uncomfortable. It becomes possible.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a human body cleaning apparatus showing an embodiment of the present invention. FIG. 2 is a schematic configuration diagram of a conventional human body cleaning apparatus.
DESCRIPTION OF SYMBOLS 11 ... Supply water piping, 12 ... Constant flow valve, 13 ... Solenoid valve, 14 ... Heat exchanger,
15 ... Vacuum breaker, 16 ... Waste water piping, 17 ... Pulsation generator,
18 ... Channel switching / flow rate adjusting valve, 19 ... Waste water channel, 20 ... Channel switching valve,
21 ... Nozzle device, 22 ... Hot water heater, 23 ... Cold water thermistor,
24 ... Warm water thermistor, 25 ... Butt passage, 26 ... Soft passage,
27: Bide flow path, 28: Controller, 29 ... Accumulator,
30 ... Float switch, 31 ... Thermal fuse, 32 ... Temperature setting device,
51 ... Water supply piping, 52 ... Constant flow valve, 53 ... Solenoid valve, 54 ... Heat exchanger 55 ... Vacuum breaker, 56 ... Waste water piping,
57... Channel switching / flow rate adjusting valve, 58.
60 ... Nozzle device, 61 ... Hot water heater, 62 ... Hot water thermistor,
63 ... Butt passage, 64 ... Soft passage, 65 ... Bidet passage,
66 ... Controller, 67 ... Float switch, 68 ... Temperature setting device

Claims

A heating device, a flow rate limiting device for limiting the flow rate of the object to be heated, a pre-heating temperature detecting means for detecting a temperature before being heated by the heating device, and a temperature after being heated by the heating device. The pre-heating temperature of the object to be heated obtained from the pre-heating temperature detection means, comprising a post-heating temperature detection means, a temperature setting means for setting the temperature of the object to be heated, and an arithmetic device for calculating the amount of heating to the heating device In the sanitary washing device that calculates the heating amount required for the heated object to reach the set temperature based on the set temperature from the temperature setting means and the flow rate limited by the flow rate limiting device,
The arithmetic device comprises an integral correction calculation means for performing a temperature correction calculation based on an integration result of a deviation between the post-heating temperature and the set temperature,
Integral correction calculation by the integral correction amount sanitary cleaning equipment you characterized in that no correction to the side to increase the heating amount of the integral correction calculation means equal to or greater than a predetermined value.

A heating device, a flow rate limiting device for limiting the flow rate of the object to be heated, a pre-heating temperature detecting means for detecting a temperature before being heated by the heating device, and a temperature after being heated by the heating device. The pre-heating temperature of the object to be heated obtained from the pre-heating temperature detection means, comprising a post-heating temperature detection means, a temperature setting means for setting the temperature of the object to be heated, and an arithmetic device for calculating the amount of heating to the heating device In the sanitary washing device that calculates the heating amount required for the heated object to reach the set temperature based on the set temperature from the temperature setting means and the flow rate limited by the flow rate limiting device,
The arithmetic device comprises an integral correction calculation means for performing a temperature correction calculation based on an integration result of a deviation between the post-heating temperature and the set temperature,
Based on the integral correction amount by the integral correction calculation, the pre-heating temperature of the object to be heated obtained from the pre-heating temperature detecting means, the set temperature from the temperature setting means, and the flow rate controlled by the flow restriction device. heated sum of the necessary heating amount to become a set temperature is, the integral correction corrects you wherein no sanitary washing to the side to increase the heat quantity calculating means equal to or greater than a predetermined value equipment.