【０００１】
【発明の属する技術分野】
本発明は、給水源の圧力を利用して便器に洗浄水を供給する洗浄給水装置に関する。
【０００２】
【従来の技術】
従来、この種の洗浄給水装置として特開２００１−１３２０３８号公報に開示されているものは、便器へ洗浄水を供給または停止させるとともに開度調節が可能な開閉弁と、開閉弁の開度を制御するカムと、カムを回転駆動するモータと、モータの回転角を制御する制御装置とを備えており、便器に供給される洗浄水の流量の調節は、開閉弁の開度が所望の開度になるようにモータによってカムを所定の角度だけ回転駆動させることによって行う。
また、特許第２８４１５３６号公報に開示されているものは、給水源に接続された管路に流量計と開度調節が可能な流量調節弁と、流量調節弁の下流側をボウルへ洗浄水を供給するボウル管路とトラップ排水路へ洗浄水を供給するトラップ管路に分岐させ、ボウル管路とトラップ管路の夫々に開閉弁と、流量調節弁の開度および開閉弁の開弁時間を制御する制御装置とを備えており、便器に供給される洗浄水の流量の調節は、流量計にて測定された流量が予め決定された流量となるように流量調節弁の開度を制御することによって行う。
【０００３】
【発明が解決しようとする課題】
しかしながら、特開２００１−１３２０３８号公報に開示されている洗浄給水装置では、例えば便器の洗浄と並行して洗面所や台所などで水が使用されるなどして給水源の圧力が変動した場合に、開閉弁の開度のみを制御するため、図７に示す如く便器へ供給される洗浄水の流量も変動する。その結果、便器を洗浄する場合には洗浄不良、洗浄給水装置の凍結防止のために少量の洗浄水を供給する場合には洗浄水の凍結を招く恐れがある。
一方、特許第２８４１５３６号公報に開示されている洗浄給水装置では、流量計や開閉弁とは別に流量調節弁を用いるため、構成が複雑になるとともに洗浄給水装置自体が大型化せざるを得ない。
【０００４】
そこで、本発明の目的は、比較的に簡素な構成でありながら給水源の圧力にかかわらず便器へ所望の洗浄水の流量を供給することができる洗浄給水装置を提供することにある。
【０００５】
【課題を解決するための手段およびその作用・効果】
上記課題を解決するために、請求項１に記載の発明は、給水源の圧力を利用して便器に洗浄水を供給する洗浄給水装置において、前記洗浄給水装置は給水源の圧力にかかわらず所定の圧力を得る圧力調整機構と、前記圧力調整機構の下流側に配置され開度調節が可能な流量調節機能付開閉弁と、前記流量調節機能付開閉弁の開弁時間および開度を制御する制御装置とを備えたことを特徴とする。
そうすることにより、給水源の圧力が変動しても流量調節機能付開閉弁に流入する洗浄水は圧力調整機構により所定の圧力に調整されているため、流量計などを用いず比較的に簡素な構成でありながら、便器へ所望の洗浄水の流量を供給することができ洗浄不良を防止することが可能となる。また、洗浄給水装置の凍結防止のために少量の洗浄水を供給する場合、給水源の圧力が変動しても確実に所定水量の供給がなされるので洗浄水の凍結を防止することが可能となる。
【０００６】
請求項２に記載の発明は、給水源の圧力を利用して便器のボウルおよびトラップ排水路の夫々に洗浄水を供給する洗浄給水装置において、前記洗浄給水装置は給水源の圧力にかかわらず所定の圧力を得る圧力調整機構と、前記圧力調整機構の下流側をボウルへ洗浄水を供給するボウル管路とトラップ排水路へ洗浄水を供給するトラップ管路に分岐させ、前記ボウル管路と前記トラップ管路の夫々に開度調節が可能な流量調節機能付開閉弁と、前記流量調節機能付開閉弁の開弁時間および開度を制御する制御装置とを備えたことを特徴とする。
そうすることにより、ボウルおよびトラップ排水路に供給される洗浄水の流量を夫々の最適流量に設定することができるので、便器の洗浄性能を維持しつつ洗浄水を節水することも可能となる。
【０００７】
請求項３に記載の発明は、給水源の圧力を利用して便器のボウルおよびトラップ排水路の夫々に洗浄水を供給する洗浄給水装置において、前記洗浄給水装置は給水源の圧力にかかわらず所定の圧力を得る圧力調整機構と、前記圧力調整機構の下流側をボウルへ洗浄水を供給するボウル管路とトラップ排水路へ洗浄水を供給するトラップ管路に分岐させ、前記ボウル管路には開度調節が可能な流量調節機能付開閉弁と、前記トラップ管路には開度調節が不可能な開閉弁と、前記流量調節機能付開閉弁の開弁時間および開度と前記開閉弁の開弁時間とを制御する制御装置とを備えたことを特徴とする。
そうすることにより、ボウルへ供給される洗浄水の流量を適量にすることができるので、洗浄水の節水やボウル外への洗浄水の飛出しを防止することが可能となる。さらに、ボウルへ供給される洗浄水の流量を供給開始から徐々に増加させてボウル管路に溜まった空気を比較的に少ない流量の洗浄水とともに排出することが可能となる。それにより比較的に多い流量の洗浄水に空気が巻込まれることによって発生する洗浄水の吐水時の騒音を低下させることが可能となる。
【０００８】
請求項４に記載の発明は、給水源の圧力を利用して便器のボウルおよびトラップ排水路の夫々に洗浄水を供給する洗浄給水装置において、前記洗浄給水装置は給水源の圧力にかかわらず所定の圧力を得る圧力調整機構と、前記圧力調整機構の下流側をボウルへ洗浄水を供給するボウル管路とトラップ排水路へ洗浄水を供給するトラップ管路に分岐させ、前記ボウル管路には開度調節が不可能な開閉弁と、前記トラップ管路には開度調節が可能な流量調節機能付開閉弁と、前記開閉弁の開弁時間と前記流量調節機能付開閉弁の開弁時間および開度とを制御する制御装置とを備えたことを特徴とする。
そうすることにより、凍結防止のために連続的または断続的に洗浄水を供給する場合に、トラップ排水路のみへ少量の洗浄水を供給することで給水時の音を静かにすることが可能となる。さらに、トラップ排水路へ供給される洗浄水の流量を供給開始から徐々に増加させてトラップ管路に溜まった空気を比較的に少ない流量の洗浄水とともに排出することが可能となる。それによりサイホン作用を誘発させるためにトラップ排水路へ洗浄水を噴出する際には洗浄水のエネルギーを有効に活用でき、サイホン作用を効率的に発生させることも可能となる。
【０００９】
請求項５に記載の発明は、給水源の圧力を利用して便器のボウルおよびトラップ排水路の夫々に洗浄水を供給する洗浄給水装置において、前記洗浄給水装置は給水源の圧力にかかわらず所定の圧力を得る圧力調整機構と、前記圧力調整機構の下流側に配置され開度調節が可能な流量調節機能付開閉弁と、前記流量調節機能付開閉弁の下流側に配置され洗浄水の供給をボウルへ洗浄水を供給するボウル管路またはトラップ排水路へ洗浄水を供給するトラップ管路に切換える切換弁と、前記流量調節機能付開閉弁の開弁時間および開度と前記切換弁の切換え操作を制御する制御装置とを備えたことを特徴とする。
そうすることにより、ボウルおよびトラップ排水路に供給される洗浄水の流量を夫々の最適流量に設定することができるので、便器の洗浄性能を維持しつつ洗浄水を節水することも可能となる。
【００１０】
本発明の好ましい態様として、請求項６に記載の発明は、前記切換弁は、ボウル管路からトラップ管路への切換過程またはトラップ管路からボウル管路への切換過程で、ボウル管路とトラップ管路のどちらか一方もしくは両方に洗浄水を供給する状態を維持することを特徴とする。
そうすることにより、ボウル管路からトラップ管路への切換過程またはトラップ管路からボウル管路への切換過程において切替弁が閉状態とならないので、水撃現象の発生を抑制することが可能となる。また、ボウル管路とトラップ管路の両方に洗浄水が供給される状態で前記切換弁の切換えを停止させて洗浄水を連続的または断続的に供給することで、ボウル管路とトラップ管路の両方の凍結防止が可能となる。
【００１１】
本発明の好ましい態様として、請求項７に記載の発明は、前記圧力調整機構を給水源に接続された止水栓と一体的に構成したことを特徴とする。
そうすることにより、洗浄給水装置を便器に載置する場合には、圧力調整機構を除いた流量調節機能付開閉弁および／または開閉弁と制御装置などを載置すればよくなるため、便器の小型化が可能となる。
【００１２】
【発明の実施の形態】
以下、本発明の第一の実施例を図面に基づいて説明する。図１は第一の実施例にかかる給水洗浄装置を備えた便器の側断面図である。
図１において、便器１０は陶器製の水洗式大便器であり、後方上部には便器１０に洗浄水を供給するための洗浄給水装置２０が取付けられており、洗浄給水装置２０はカバー３０によって保護されている。便器１０はいわゆるサイホンゼット式便器であり、ボウル１１の上部に周設されボウル１１へ洗浄水を導く導水路１２と、導水路１２へ洗浄水を吐水するリム用ノズル１３と、ボウル１１内の洗浄水や汚物をトイレの床面に配設された図示しない排水管へ排出するためのトラップ排水路１４と、トラップ排水路へ洗浄水を噴出するジェット用ノズル１５とを備えている。
【００１３】
洗浄給水装置２０は、上流側が壁面に配設された図示しない給水源に接続された止水栓４０に一体的に形成され、給水源の圧力にかかわらず所定の圧力を得るための減圧弁２３と、減圧弁２３に連結されるとともに下流側が２つに分岐され、分岐された一方であってリム用ノズル１３に連結されたリム用給水管２１Ｒと、分岐された他方であってジェット用ノズル１５に連結されたジェット用給水管２１Ｊとを備えた分岐管２１と、リム用給水管２１Ｒの途中に配置されリム用ノズル１３へ洗浄水を供給または停止する開度調節が可能なリム用流量調節機能付開閉弁２２Ｒと、リム用流量調節機能付開閉弁２２Ｒの下流側に配置され、リム用流量調節機能付開閉弁２２Ｒが閉弁してリム用ノズル１３への洗浄水の供給を停止している場合にリム用流量調節機能付開閉弁２２Ｒよりも下流側の圧力を大気に開放するリム用大気開放弁２４Ｒと、ジェット用給水管２１Ｊの途中に配置されジェット用ノズル１５へ洗浄水を供給または停止する開度調節が可能なジェット用流量調節機能付開閉弁２２Ｊと、ジェット用流量調節機能付開閉弁２２Ｊの下流側に配置され、ジェット用流量調節機能付開閉弁２２Ｊが閉弁している場合にジェット用流量調節機能付開閉弁２２Ｊよりも下流側の圧力を大気に開放するジェット用大気開放弁２４Ｊと、使用者により洗浄の指令が入力される洗浄ボタン２６Ａと凍結防止運転の指令が入力される凍結防止運転ボタン２６Ｂとを備えた操作スイッチ２６と、操作スイッチ２６への入力に基づきリム用流量調節機能付開閉弁２２Ｒおよびジェット用流量調節機能付開閉弁２２Ｊの開閉と開度を制御する制御装置２７とを備えている。
【００１４】
リム用ノズル１３およびジェット用ノズル１５から供給される洗浄水の流量は、減圧弁２３の下流側にリム用流量調節機能付開閉弁２２Ｒとジェット用流量調節機能付開閉弁２２Ｊが設けられているため、給水源の圧力が変動しても減圧弁２３によって所定の圧力に減圧されているので、リム用流量調節機能付開閉弁２２Ｒとジェット用流量調節機能付開閉弁２２Ｊの夫々の開度のみに依存するとともに、その変動は開度が一定であれば極めて小さい。よって、制御装置２７によりリム用流量調節機能付開閉弁２２Ｒおよびジェット用流量調節機能付開閉弁２２Ｊの夫々の開度を制御することで、所望の流量および流量特性を得ることが可能となる。
尚、リム用流量調節機能付開閉弁２２Ｒおよびジェット用流量調節機能付開閉弁２２Ｊは、ステッピングモータ等を用いた開度調節が可能な電磁開閉弁であるが、洗浄水の流路の開閉および開度調節が可能な機構であればこの他であってもよい。また、給水源の圧力にかかわらず所定の圧力を得る圧力調整機構であれば、減圧弁２３でなくともよい。
【００１５】
続いて、第一の実施例における洗浄動作について説明する。
使用者により洗浄ボタン２６Ａが押されると、制御装置２７はリム用流量調節機能付開閉弁２２Ｒのみを所定の開度となるまで徐々に開弁させた後、その開度を所定時間保持させて、図４に示される流量特性の前リム洗浄を行う。リム用流量調節機能付開閉弁２２Ｒが開弁されると、止水栓４０および減圧弁２３を通過した後、リム用流量調節機能付開閉弁２２Ｒによって止水されていた洗浄水は、リム用大気開放弁２４Ｒを経由してリム用ノズル１３から導水路１２へ吐水され、ボウル１１を洗浄しながら流下してトラップ排水路１４へ流れ込む。この時、リム用流量調節機能付開閉弁２２Ｒを徐々に開弁させることで、リム用ノズル１３から吐水される洗浄水の流量を供給開始から徐々にボウル１１全体に洗浄水が行き渡る所定の流量まで増加させる。そうすることにより、リム用給水管２１Ｒに溜まった空気を比較的に少ない流量の洗浄水とともにリム用ノズル１３から排出できるので、比較的に多い流量の洗浄水に空気が巻込まれることによって発生する洗浄水の吐水時の騒音を低下させることが可能となる。
【００１６】
制御装置２７はリム用流量調節機能付開閉弁２２Ｒのみを所定時間開弁させた後、ジェット用流量調節機能付開閉弁２２Ｊのみを所定の開度となるまで徐々に開弁し、その開度を所定時間保持させて、図４に示される流量特性のジェット洗浄を行う。ジェット用流量調節機能付開閉弁２２Ｊが開弁されると、止水栓４０および減圧弁２３を通過した後、ジェット用流量調節機能付開閉弁２２Ｊによって止水されていた洗浄水は、ジェット用大気開放弁２４Ｊを経由してジェット用ノズル１５からトラップ排水路１４へ噴出され、トラップ排水路１４を満水にしてサイホン作用を誘発させ、ボウル１１内に貯溜された洗浄水や汚物を排出する。この時、ジェット用流量調節機能付開閉弁２２Ｊを徐々に開弁させることで、ジェット用給水管２１Ｊに溜まった空気を比較的に少ない流量の洗浄水とともにジェット用ノズル１５から排出できるため、所定の流量の洗浄水を噴出した際には洗浄水のエネルギーを有効に活用できるので、サイホン作用を効率的に発生させることが可能となる。
【００１７】
制御装置２７はジェット用流量調節機能付開閉弁２２Ｊのみを所定時間開弁させた後、リム用流量調節機能付開閉弁２２Ｒのみを所定の開度となるまで徐々に開弁し、その開度を所定時間保持させて、図４に示される流量特性の後リム洗浄を行う。リム用流量調節機能付開閉弁２２Ｒが開弁されると、止水栓４０および減圧弁２３を通過した後、リム用流量調節機能付開閉弁２２Ｒによって止水されていた洗浄水は、リム用大気開放弁２４Ｒを経由してリム用ノズル１３から導水路１２へ吐水され、ボウル１１に貯溜される。この時、前リム洗浄と同様に、リム用流量調節機能付開閉弁２２Ｒを徐々に開弁させることで、リム用給水管２１Ｒに溜まった空気を比較的に少ない流量の洗浄水とともにリム用ノズル１３から排出できるので、比較的に多い流量の洗浄水に空気が巻込まれることによって発生する洗浄水の吐水時の騒音を低下させることが可能となる。尚、後リム洗浄は、ボウル１１に洗浄水が貯溜される時間を予め予測しておき、その時間だけ、リム用流量調節機能付開閉弁２２Ｒを開弁することによって行われる。
【００１８】
上述の如く洗浄動作は、前リム洗浄によるボウル１１の洗浄、ジェット洗浄による汚物の排出、後リム洗浄によるボウル１１への洗浄水の貯溜といった一連の動作によって行われる。
【００１９】
続いて、第一の実施例における凍結防止運転について説明する。
使用者により凍結防止運転ボタン２６Ｂが押されると、制御装置２７はリム用流量調節機能付開閉弁２２Ｒとジェット用流量調節機能付開閉弁２２Ｊの両方を所定の開度だけ開弁させて少量の洗浄水を供給し、図５に示される流量特性の凍結防止運転を行う。この時に供給される洗浄水の流量は、給水源の圧力が変動しても減圧弁２３によって所定の圧力に減圧されているので、略一定となる。尚、凍結防止運転は使用者により凍結防止運転ボタン２６Ｂを再度押されるまで継続される。
【００２０】
次に、本発明の第二の実施例を図面に基づいて説明するが、ここでは第一の実施例と異なる部分についてのみ説明する。図２は第二の実施例にかかる給水洗浄装置を備えた便器の側断面図である。
【００２１】
第二の実施例の構成は、洗浄給水装置２０Ａのジェット用給水管２１Ｊの途中に開度調節が可能な流量調節機能付開閉弁ではなく開度調節が不可能なジェット用開閉弁２５Ｊを備える他は、第一の実施例と同じである。
【００２２】
続いて、第二の実施例における洗浄動作について説明する。
使用者により洗浄ボタン２６Ａが押されると、制御装置２７は、まずリム用流量調節機能付開閉弁２２Ｒのみを所定時間だけ開弁させて前リム洗浄を行い、続いてジェット用開閉弁２５Ｊのみを所定時間だけ開弁させてジェット洗浄を行い、最後にリム用流量調節機能付開閉弁２２Ｒのみを所定時間だけ開弁させて後リム洗浄を行って、一連の動作を完了させるが、前リム洗浄および後リム洗浄は第一の実施例と同じ洗浄動作であるため、ここではジェット洗浄についてのみ説明する。
【００２３】
制御装置２７は前リム洗浄の後、ジェット用開閉弁２５Ｊのみを開弁させてジェット洗浄を行うが、ジェット用開閉弁２５Ｊは開度調節が不可能なため図６に示される流量特性となる。ジェット用開閉弁２５Ｊが開弁されると、止水栓４０および減圧弁２３を通過した後、ジェット用開閉弁２５Ｊによって止水されていた洗浄水は、ジェット用大気開放弁２４Ｊを経由してジェット用ノズル１５からトラップ排水路１４へ噴出され、トラップ排水路１４を満水にしてサイホン作用を誘発させ、ボウル１１内に貯溜された洗浄水や汚物を排出する。この時、ジェット用給水管２１Ｊに溜まった空気が洗浄水に巻込まれるため、サイホン作用を効率的に発生させることができない。
【００２４】
続いて、第二の実施例における凍結防止運転について説明する。
使用者により凍結防止運転ボタン２６Ｂが押されると、制御装置２７はリム用流量調節機能付開閉弁２２Ｒのみを所定の開度だけ開弁させて少量の洗浄水を供給し、図５に示される流量特性の凍結防止運転を行う。この時に供給される洗浄水の流量は、給水源の圧力が変動しても減圧弁２３によって所定の圧力に減圧されているので、略一定となる。尚、凍結防止運転は使用者により凍結防止運転ボタン２６Ｂを再度押されるまで継続される。
【００２５】
次に、本発明の第三の実施例を図面に基づいて説明するが、ここでは第一の実施例と異なる部分についてのみ説明する。図３は第三の実施例にかかる給水洗浄装置を備えた便器の側断面図である。
【００２６】
第三の実施例の構成は、洗浄給水装置２０Ａのリム用給水管２１Ｒの途中に開度調節が可能な流量調節機能付開閉弁ではなく開度調節が不可能なリム用開閉弁２５Ｒを備える他は、第一の実施例と同じである。
【００２７】
続いて、第三の実施例における洗浄動作について説明する。
使用者により洗浄ボタン２６Ａが押されると、制御装置２７は、まずリム用開閉弁２５Ｒのみを所定時間だけ開弁させて前リム洗浄を行い、続いてジェット用流量調節機能付開閉弁２２Ｊのみを所定時間だけ開弁させてジェット洗浄を行い、最後にリム用開閉弁２５Ｒのみを所定時間だけ開弁させて後リム洗浄を行って、一連の動作を完了させるが、ジェット洗浄は第一の実施例と同じ洗浄動作であり、また後リム洗浄は前リム洗浄とほぼ同じ洗浄動作であることから、ここでは前リム洗浄についてのみ説明する。
【００２８】
制御装置２７は使用者により洗浄ボタン２６Ａが押されると、リム用開閉弁２５Ｒのみを開弁させてリム洗浄を行うが、リム用開閉弁２５Ｒは開度調節が不可能なため図６に示される流量特性となる。リム用開閉弁２５Ｒが開弁されると、止水栓４０および減圧弁２３を通過した後、リム用開閉弁２５Ｒによって止水されていた洗浄水は、リム用大気開放弁２４Ｒを経由してリム用ノズル１３から導水路１２へ吐水され、ボウル１１を洗浄しながら流下してトラップ排水路１４へ流れ込む。この時、リム用給水管２１Ｒに溜まった空気が洗浄水に巻込まれるため、洗浄水の吐水時に騒音が生じる。
【００２９】
続いて、第三の実施例における凍結防止運転について説明する。
使用者により凍結防止運転ボタン２６Ｂが押されると、制御装置２７はジェット用流量調節機能付開閉弁２２Ｊのみを所定の開度だけ開弁させて少量の洗浄水を供給し、図５に示される流量特性の凍結防止運転を行う。この時に供給される洗浄水の流量は、給水源の圧力が変動しても減圧弁２３によって所定の圧力に減圧されているので、略一定となる。尚、凍結防止運転は使用者により凍結防止運転ボタン２６Ｂを再度押されるまで継続される。
【００３０】
次に、本発明の第四の実施例を図面に基づいて説明する。図８は第四の実施例にかかる給水洗浄装置を備えた便器の側断面図である。
図８において、便器１０は陶器製の水洗式大便器であり、後方上部には便器１０に洗浄水を供給するための洗浄給水装置２０が取付けられており、洗浄給水装置２０はカバー３０によって保護されている。便器１０はいわゆるサイホンゼット式便器であり、ボウル１１の上部に周設されボウル１１へ洗浄水を導く導水路１２と、導水路１２へ洗浄水を吐水するリム用ノズル１３と、ボウル１１内の洗浄水や汚物をトイレの床面に配設された図示しない排水管へ排出するためのトラップ排水路１４と、トラップ排水路へ洗浄水を噴出するジェット用ノズル１５とを備えている。
【００３１】
洗浄給水装置２０は、上流側が壁面に配設された図示しない給水源に接続された止水栓４０に一体的に形成され、給水源の圧力にかかわらず所定の圧力を得るための減圧弁２３と、減圧弁２３の下流側に配置され洗浄水を供給または停止する開度調節が可能な流量調節機能付開閉弁２２と、流量調節機能付開閉弁２２の下流側に配置され洗浄水の供給をリム用ノズル１３に連結されたリム用給水管２１Ｒまたはジェット用ノズル１５に連結されたジェット用給水管２１Ｊに切換える切換弁２８と、減圧弁２３から流量調節機能付開閉弁２２を経由して切換弁２８とを連結する連結管２１Ｓと、リム用給水管２１Ｒの途中に配置されリム用ノズル１３への洗浄水の供給が停止している場合に切換弁２８よりも下流側の圧力を大気に開放するリム用大気開放弁２４Ｒと、ジェット用給水管２１Ｊの途中に配置されジェット用ノズル１５への洗浄水の供給が停止している場合に切替弁２８よりも下流側の圧力を大気に開放するジェット用大気開放弁２４Ｊと、使用者により洗浄の指令が入力される洗浄ボタン２６Ａと凍結防止運転の指令が入力される凍結防止運転ボタン２６Ｂとを備えた操作スイッチ２６と、操作スイッチ２６への入力に基づき流量調節機能付開閉弁２２の開閉と開度および切換弁２８の切換えを制御する制御装置２７とを備えている。
【００３２】
図９は切換弁２８のリム用給水管２１Ｒ側開状態を示し、図１０は切換弁のジェット用給水管２１Ｊ側開状態を示し、図１１は切換弁２８の両給水管２１Ｒ、２１Ｊ側開状態を示す。図９乃至図１１に示される如く、切換弁２８は、洗浄水が流入する分岐管２１と洗浄水が流出するリム用給水管２１Ｒおよびジェット用給水管２１Ｊを備えたケーシング２８Ｃと、ケーシング２８Ｃ内に収納され分岐管２１から流入した洗浄水をリム用給水管２１Ｒとジェット用給水管２１Ｊのどちらか一方もしくは両方に流出させるコマ２８Ｋと、コマ２８Ｋを切換え駆動する図示しないモータとを備えている。
【００３３】
リム用ノズル１３およびジェット用ノズル１５から供給される洗浄水の流量は、減圧弁２３の下流側に流量調節機能付開閉弁２２が設けられているため、給水源の圧力が変動しても減圧弁２３によって所定の圧力に減圧されているので、流量調節機能付開閉弁２２の開度のみに依存するとともに、その変動は開度が一定であれば極めて小さい。よって、制御装置２７により流量調節機能付開閉弁２２の開度を制御することで、所望の流量および流量特性を得ることが可能となる。尚、流量調節機能付開閉弁２２は、ステッピングモータ等を用いた開度調節が可能な電磁開閉弁であるが、洗浄水の流路の開閉および開度調節が可能な機構であればこの他であってもよい。また、給水源の圧力にかかわらず所定の圧力を得る圧力調整機構であれば減圧弁２３以外のものでもよく、切換弁２８の構造も例えば特開２００１−２６９６１号公報に開示される如く複数の開閉弁をカムを介してモータによって開閉駆動する構造でもよい。また、流量調節機能付開閉弁２２と切換弁２８、更にはリム用大気開放弁２４Ｒやジェット用大気開放弁２４Ｊを一体的に接続し、ユニット化してもよい。
【００３４】
続いて、第四の実施例における洗浄動作について説明する。
使用者により洗浄ボタン２６Ａが押されると、制御装置２７はコマ２８Ｋを駆動制御して切換弁２８を図９に示すようにリム用給水管２１Ｒ側を開状態にするとともに流量調節機能付開閉弁２２を所定の開度となるまで徐々に開弁させた後、その開度を所定時間保持させて図４に示される流量特性の前リム洗浄を行う。流量調節機能付開閉弁２２が開弁されると、止水栓４０および減圧弁２３を通過した後、流量調節機能付開閉弁２２によって止水されていた洗浄水は、切換弁２８およびリム用大気開放弁２４Ｒを経由してリム用ノズル１３から導水路１２へ吐水され、ボウル１１を洗浄しながら流下してトラップ排水路１４へ流れ込む。この時、流量調節機能付開閉弁２２を徐々に開弁させることで、リム用ノズル１３から吐水される洗浄水の流量を供給開始から徐々にボウル１１全体に洗浄水が行き渡る所定の流量まで増加させる。そうすることにより、リム用給水管２１Ｒに溜まった空気を比較的に少ない流量の洗浄水とともにリム用ノズル１３から排出できるので、比較的に多い流量の洗浄水に空気が巻込まれることによって発生する洗浄水の吐水時の騒音を低下させることが可能となる。
【００３５】
次に、制御装置２７は流量調節機能付開閉弁２２を所定の開度に保持しつつ、コマ２８Ｋを駆動制御して切換弁２８を図１１に示すように給水管２１Ｒ、２１Ｊの両側が開となる状態を経由して、図１０に示すようにジェット用給水管２１Ｊ側のみが開となる状態に切換えてジェット洗浄を行う。切換弁２８がジェット用給水管２１Ｊ側開状態に切換えられると、リム用給水管２１Ｒに供給されていた洗浄水は、ジェット用大気開放弁２４Ｊを経由してジェット用ノズル１５からトラップ排水路１４へ噴出され、トラップ排水路１４を満水にしてサイホン作用を誘発させ、ボウル１１内に貯溜された洗浄水や汚物を排出する。この時、切換弁２８はリム用給水管２１Ｒ側開状態からジェット用給水管２１Ｊ側開状態に切換わる過程で給水管２１Ｒ、２１Ｊの両側が開となる状態を経由するため、ジェット用給水管２１Ｊに溜まった空気を比較的に少ない流量の洗浄水とともにジェット用ノズル１５から排出できるので、完全にジェット用給水管２１Ｊ側開状態に切換わり所定の流量の洗浄水が噴出された際には洗浄水のエネルギーを有効に活用でき、サイホン作用を効率的に発生させることが可能になるとともに、洗浄水の供給が停止されないので、水撃現象の発生を抑制することが可能となる。
【００３６】
最後に、制御装置２７は流量調節機能付開閉弁２２を所定の開度に保持しつつ、コマ２８Ｋを駆動制御して切換弁２８を図１１に示す給水管２１Ｒ、２１Ｊの両側が開となる状態を経由して図９に示すリム用給水管２１Ｒ側開状態に切換えて後リム洗浄を行う。切換弁２８がリム用給水管２１Ｒ側開状態に切換えられると、ジェット用給水管２１Ｊに供給されていた洗浄水は、リム用大気開放弁２４Ｒを経由してリム用ノズル１３から導水路１２へ吐水され、ボウル１１に貯溜される。この時、切換弁２８はジェット用給水管２１Ｊ側開状態からリム用給水管２１Ｒ側開状態に切換わる過程で給水管２１Ｒ、２１Ｊの両側が開となる状態を経由するため、リム用給水管２１Ｒに溜まった空気を比較的に少ない流量の洗浄水とともにリム用ノズル１３から排出できるので、比較的に多い流量の洗浄水に空気が巻込まれることによって発生する洗浄水の吐水時の騒音を低下させることが可能になるとともに、洗浄水の供給が停止されないので、水撃現象の発生を抑制することが可能となる。尚、後リム洗浄は、ボウル１１に洗浄水が貯溜される時間を予め予測しておき、その時間だけ、流量調節機能付開閉弁２２を開弁することによって行われる。
【００３７】
上述の如く洗浄動作は、前リム洗浄によるボウル１１の洗浄、ジェット洗浄による汚物の排出、後リム洗浄によるボウル１１への洗浄水の貯溜といった一連の動作によって行われる。
【００３８】
続いて、第四の実施例における凍結防止運転について説明する。
使用者により凍結防止運転ボタン２６Ｂが押されると、制御装置２７はコマ２８Ｋを駆動制御して切換弁２８を図１１に示すように両給水管２１Ｒ、２１Ｊの両側が開となる状態にするとともに流量調節機能付開閉弁２２を所定の開度となるまで徐々に開弁させてリム用給水管２１Ｒとジェット用給水管２１Ｊの両方に少量の洗浄水を供給し、図５に示される流量特性の凍結防止運転を行う。この時に供給される洗浄水の流量は、給水源の圧力が変動しても減圧弁２３によって所定の圧力に減圧されているので、略一定となる。尚、凍結防止運転は使用者により凍結防止運転ボタン２６Ｂを再度押されるまで継続される。
【図面の簡単な説明】
【図１】第一の実施例にかかる給水洗浄装置を備えた便器の側断面図。
【図２】第二の実施例にかかる給水洗浄装置を備えた便器の側断面図。
【図３】第三の実施例にかかる給水洗浄装置を備えた便器の側断面図。
【図４】開度調節が可能な流量調節機能付開閉弁を用いた場合の流量特性図。
【図５】凍結防止運転の場合の流量特性図。
【図６】開度調節が不可能な開閉弁を用いた場合の流量特性図。
【図７】従来の洗浄給水装置の流量特性図。
【図８】第四の実施例にかかる給水洗浄装置を備えた便器の側断面図。
【図９】切換弁のリム用給水管側が開の状態図。
【図１０】切換弁のジェット用給水管側が開の状態図。
【図１１】切換弁の両給水管側が開の状態図。
【符号の説明】
１０…便器
１１…ボウル
１２…導水路
１３…リム用ノズル
１４…トラップ排水路
１５…ジェット用ノズル
２０、２０Ａ、２０Ｂ…洗浄給水装置
２１…分岐管
２１Ｒ…リム用給水管
２１Ｊ…ジェット用給水管
２１Ｓ…連結管
２２…流量調節機能付開閉弁
２２Ｒ…リム用流量調節機能付開閉弁
２２Ｊ…ジェット用流量調節機能付開閉弁
２３…減圧弁
２４Ｒ…リム用大気開放弁
２４Ｊ…ジェット用大気開放弁
２５Ｒ…リム用開閉弁
２５Ｊ…ジェット用開閉弁
２６…操作スイッチ
２６Ａ…洗浄ボタン
２６Ｂ…凍結防止運転ボタン
２７…制御装置
２８…切換弁
２８Ｃ…ケーシング
２８Ｋ…コマ
３０…カバー
４０…止水栓[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a flush water supply device for supplying flush water to a toilet using pressure of a water supply source.
[0002]
[Prior art]
Conventionally, as this type of flush water supply device, one disclosed in Japanese Unexamined Patent Application Publication No. 2001-132038 is an on-off valve capable of supplying or stopping flush water to a toilet bowl and adjusting the opening degree, and an opening degree of the on-off valve. A control cam, a motor for driving the cam to rotate, and a control device for controlling the rotation angle of the motor are provided. The flow rate of the washing water supplied to the toilet is adjusted by adjusting the opening of the on-off valve to a desired opening degree. The rotation is performed by rotating the cam by a predetermined angle by a motor so that the rotation angle becomes a degree.
Further, the one disclosed in Japanese Patent No. 2841536 discloses a pipe connected to a water supply source, a flow meter and a flow rate control valve capable of adjusting an opening degree, and washing water downstream of the flow rate control valve into a bowl. The water is branched into a bowl line to supply water and a trap line to supply washing water to the trap drainage line. The opening and closing valves of the bowl line and the trap line, the degree of opening of the flow control valve, and the opening time of the opening and closing valve are respectively determined. And a control device for controlling the flow rate of the washing water supplied to the toilet by controlling the opening degree of the flow control valve so that the flow rate measured by the flow meter becomes a predetermined flow rate. By doing.
[0003]
[Problems to be solved by the invention]
However, in the flush water supply apparatus disclosed in Japanese Patent Application Laid-Open No. 2001-132038, when the pressure of the water supply source fluctuates due to, for example, water being used in a washroom or a kitchen in parallel with flushing the toilet. Since only the opening of the on-off valve is controlled, the flow rate of the washing water supplied to the toilet also varies as shown in FIG. As a result, there is a possibility that cleaning failure may occur when the toilet is washed, and when a small amount of cleaning water is supplied to prevent freezing of the cleaning water supply device, the cleaning water may freeze.
On the other hand, in the cleaning water supply device disclosed in Japanese Patent No. 2841536, a flow control valve is used separately from the flow meter and the on-off valve, so that the configuration becomes complicated and the cleaning water supply device itself has to be enlarged. .
[0004]
Therefore, an object of the present invention is to provide a flush water supply device that can supply a desired flow rate of flush water to a toilet irrespective of the pressure of a water supply source while having a relatively simple configuration.
[0005]
[Means for Solving the Problems and Their Functions and Effects]
In order to solve the above-mentioned problem, the invention according to claim 1 is a cleaning water supply apparatus for supplying cleaning water to a toilet using the pressure of a water supply source, wherein the cleaning water supply apparatus has a predetermined function regardless of the pressure of the water supply source. A pressure adjusting mechanism for obtaining the pressure of the pressure adjusting mechanism, an opening / closing valve having a flow rate adjusting function which is disposed downstream of the pressure adjusting mechanism and capable of adjusting the opening degree, and controlling a valve opening time and an opening degree of the opening / closing valve having the flow rate adjusting function. And a control device.
By doing so, even if the pressure of the water supply source fluctuates, the washing water flowing into the on-off valve with flow rate adjustment function is adjusted to a predetermined pressure by the pressure adjustment mechanism, so it is relatively simple without using a flow meter etc. Despite the simple configuration, it is possible to supply a desired flow rate of the washing water to the toilet, and it is possible to prevent poor cleaning. When a small amount of washing water is supplied to prevent the washing water supply device from freezing, a predetermined amount of water is reliably supplied even if the pressure of the water supply source fluctuates, so that freezing of the washing water can be prevented. Become.
[0006]
According to a second aspect of the present invention, there is provided a flush water supply device for supplying flush water to each of a bowl of a toilet bowl and a trap drainage channel by using pressure of a water supply source, wherein the flush water supply device is provided irrespective of pressure of the water supply source. A pressure adjusting mechanism for obtaining the pressure of the above, a downstream side of the pressure adjusting mechanism is branched into a bowl line for supplying washing water to a bowl and a trap line for supplying washing water to a trap drainage line, and the bowl line and the An opening / closing valve with a flow rate adjusting function capable of adjusting the opening degree of each of the trap pipes, and a control device for controlling the opening time and the opening degree of the opening / closing valve with a flow rate adjusting function are provided.
By doing so, the flow rate of the wash water supplied to the bowl and the trap drainage channel can be set to the respective optimum flow rates, so that it is possible to save the wash water while maintaining the flush performance of the toilet.
[0007]
According to a third aspect of the present invention, there is provided a flush water supply device for supplying flush water to each of a bowl of a toilet bowl and a trap drainage channel by using pressure of a water supply source, wherein the flush water supply device is provided irrespective of pressure of the water supply source. A pressure adjusting mechanism for obtaining the pressure of the above, a downstream side of the pressure adjusting mechanism is branched into a bowl line for supplying washing water to the bowl and a trap line for supplying washing water to the trap drainage line, and the bowl line includes An on-off valve with a flow control function capable of adjusting the opening degree, an on-off valve whose opening degree cannot be adjusted in the trap line, an opening time and opening degree of the on-off valve with the flow control function, and A control device for controlling the valve opening time.
By doing so, the flow rate of the washing water supplied to the bowl can be made appropriate, so that it is possible to save the washing water and prevent the washing water from flowing out of the bowl. Further, it is possible to gradually increase the flow rate of the cleaning water supplied to the bowl from the start of the supply and discharge the air accumulated in the bowl conduit together with the cleaning water having a relatively small flow rate. This makes it possible to reduce the noise generated when the cleaning water is discharged when air is entrained in the cleaning water having a relatively large flow rate.
[0008]
According to a fourth aspect of the present invention, there is provided a flush water supply device for supplying flush water to each of a bowl of a toilet bowl and a trap drainage channel using a pressure of a water supply source, wherein the flush water supply device is provided irrespective of the pressure of the water supply source. A pressure adjusting mechanism for obtaining the pressure of the above, a downstream side of the pressure adjusting mechanism is branched into a bowl line for supplying washing water to the bowl and a trap line for supplying washing water to the trap drainage line, and the bowl line includes An on-off valve whose opening degree cannot be adjusted, an on-off valve with a flow rate adjusting function whose opening degree can be adjusted in the trap line, an opening time of the on-off valve and an opening time of the on-off valve with the flow rate adjusting function And a control device for controlling the opening degree.
By doing so, when supplying wash water continuously or intermittently to prevent freezing, it is possible to quiet the sound of water supply by supplying a small amount of wash water only to the trap drainage channel. Become. Further, it is possible to gradually increase the flow rate of the cleaning water supplied to the trap drainage channel from the start of the supply, and to discharge the air accumulated in the trap pipe together with a relatively small flow rate of the cleaning water. Thereby, when the washing water is jetted to the trap drainage channel to induce the siphon action, the energy of the washing water can be effectively used, and the siphon action can be generated efficiently.
[0009]
According to a fifth aspect of the present invention, there is provided a flush water supply device for supplying flush water to each of a bowl of a toilet bowl and a trap drainage channel by using pressure of a water supply source, wherein the flush water supply device is provided irrespective of pressure of the water supply source. A pressure adjusting mechanism for obtaining the pressure, an opening / closing valve having a flow rate adjusting function which is arranged downstream of the pressure adjusting mechanism and whose opening degree can be adjusted, and a supply of washing water which is arranged downstream of the opening / closing valve having the flow rate adjusting function. A switching valve for switching to a bowl conduit for supplying washing water to a bowl or a trap conduit for supplying washing water to a trap drainage passage, and switching of the opening time and opening degree of the on-off valve with the flow rate control function and the switching valve And a control device for controlling the operation.
By doing so, the flow rate of the wash water supplied to the bowl and the trap drainage channel can be set to the respective optimum flow rates, so that it is possible to save the wash water while maintaining the flush performance of the toilet.
[0010]
As a preferred embodiment of the present invention, the invention according to claim 6 is characterized in that the switching valve is connected to the bowl line during the switching process from the bowl line to the trap line or during the switching process from the trap line to the bowl line. It is characterized in that a state in which cleaning water is supplied to one or both of the trap lines is maintained.
By doing so, the switching valve does not close in the process of switching from the bowl line to the trap line or the process of switching from the trap line to the bowl line, so that the occurrence of the water hammer phenomenon can be suppressed. Become. In addition, by stopping the switching of the switching valve in a state where the washing water is supplied to both the bowl pipe and the trap pipe, and supplying the washing water continuously or intermittently, the bowl pipe and the trap pipe are provided. Both types can be prevented from freezing.
[0011]
As a preferred embodiment of the present invention, the invention according to claim 7 is characterized in that the pressure adjusting mechanism is integrally formed with a water stopcock connected to a water supply source.
By doing so, when the flush water supply device is mounted on the toilet, the on-off valve with a flow rate control function and / or the on-off valve and the control device, excluding the pressure adjustment mechanism, can be mounted. Is possible.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side sectional view of a toilet provided with a water supply / cleaning device according to the first embodiment.
In FIG. 1, a toilet 10 is a ceramic flush toilet, and a flush water supply device 20 for supplying flush water to the toilet 10 is attached to an upper rear portion. The flush water supply device 20 is protected by a cover 30. Have been. The toilet 10 is a so-called siphon jet toilet, and is provided around a bowl 11 to guide washing water to the bowl 11, a rim nozzle 13 for spouting washing water to the water guiding channel 12, and a rim nozzle 13 inside the bowl 11. The system includes a trap drain 14 for discharging cleaning water and waste to a drain pipe (not shown) provided on the floor of the toilet, and a jet nozzle 15 for jetting the cleaning water to the trap drain.
[0013]
The flush water supply device 20 is integrally formed with a water stopcock 40 connected to a water supply source (not shown) whose upstream side is disposed on a wall surface, and a pressure reducing valve 23 for obtaining a predetermined pressure regardless of the pressure of the water supply source. And the rim water supply pipe 21R, which is connected to the pressure reducing valve 23 and the downstream side is branched into two, and is branched and connected to the rim nozzle 13; A branch pipe 21 having a jet water supply pipe 21J connected to the rim 15 and a rim flow rate that can be adjusted in opening to supply or stop cleaning water to the rim nozzle 13 that is disposed in the middle of the rim water supply pipe 21R. The on-off valve 22R with the adjustment function and the on-off valve 22R with the flow adjustment function for rim are disposed downstream of the on-off valve 22R with the flow adjustment function for the rim. If you have An air release valve for rim 24R for releasing the pressure downstream of the on-off valve 22R with a flow rate adjusting function to the atmosphere, and an opening for supplying or stopping the washing water to the jet nozzle 15 which is disposed in the middle of the jet water supply pipe 21J. The on-off valve with jet flow control function 22J capable of adjusting the degree, and the on-off valve with jet flow control function which is arranged downstream of the on-off valve with jet flow control function 22J and is closed when the on-off valve with jet flow control function 22J is closed. A jet air release valve 24J for releasing the pressure downstream of the on-off valve 22J with a flow rate adjusting function to the atmosphere, a cleaning button 26A to which a user inputs a cleaning command, and a freeze prevention operation command are input. An operation switch 26 having an antifreeze operation button 26B, an on-off valve 22R with a rim flow control function based on an input to the operation switch 26, and a jet flow control And a control unit 27 for controlling the opening and closing and opening of the functions opening-closing valve 22J.
[0014]
The flow rate of the washing water supplied from the rim nozzle 13 and the jet nozzle 15 is provided with a rim flow control function on-off valve 22R and a jet flow control function on-off valve 22J downstream of the pressure reducing valve 23. Therefore, even if the pressure of the water supply source fluctuates, since the pressure is reduced to a predetermined pressure by the pressure reducing valve 23, only the respective opening degrees of the on-off valve 22R with the flow control function for the rim and the on-off valve 22J with the flow control function for the jet are provided. And the variation is extremely small if the opening is constant. Therefore, by controlling the opening degree of the on-off valve 22R with the flow rate adjusting function for the rim and the on-off valve 22J with the flow rate adjusting function for the jet by the control device 27, a desired flow rate and flow rate characteristics can be obtained.
The on-off valve 22R with a flow control function for the rim and the on-off valve 22J with a flow control function for the jet are electromagnetic on-off valves whose opening degree can be adjusted using a stepping motor or the like. Other mechanisms may be used as long as the mechanism can adjust the opening. The pressure reducing mechanism need not be the pressure reducing valve 23 as long as it is a pressure adjusting mechanism that obtains a predetermined pressure regardless of the pressure of the water supply source.
[0015]
Next, the cleaning operation in the first embodiment will be described.
When the cleaning button 26A is pressed by the user, the control device 27 gradually opens only the rim flow rate control opening / closing valve 22R until a predetermined opening degree is reached, and then holds the opening degree for a predetermined time. Then, the pre-rim cleaning of the flow characteristics shown in FIG. 4 is performed. When the rim on-off valve with flow control function 22R is opened, after passing through the water stopcock 40 and the pressure reducing valve 23, the washing water that has been stopped by the on-off valve with rim flow control function 22R is removed from the rim. Water is discharged from the rim nozzle 13 to the water conduit 12 via the atmosphere release valve 24R, flows down while cleaning the bowl 11, and flows into the trap drainage channel 14. At this time, by gradually opening the on-off valve 22 </ b> R with the rim flow rate adjusting function, the flow rate of the wash water discharged from the rim nozzle 13 is gradually increased from the start of supply to the predetermined flow rate at which the wash water reaches the entire bowl 11. To increase. By doing so, the air accumulated in the rim water supply pipe 21R can be discharged from the rim nozzle 13 together with the relatively small flow rate of the wash water, so that the air is trapped in the relatively large flow rate of the wash water. It is possible to reduce noise at the time of discharging the cleaning water.
[0016]
The control device 27 opens only the rim flow control function-equipped on-off valve 22R for a predetermined time, and then gradually opens only the jet flow rate control function-equipped on-off valve 22J until a predetermined opening degree is reached. Is held for a predetermined time, and the jet cleaning with the flow characteristics shown in FIG. 4 is performed. When the on-off valve with jet flow control function 22J is opened, the washing water that has been stopped by the on-off valve with jet flow control function 22J after passing through the water stopcock 40 and the pressure reducing valve 23 is used for jet. The jet water is jetted from the jet nozzle 15 to the trap drainage channel 14 via the air release valve 24J to fill the trap drainage channel 14 to induce a siphon action, thereby discharging washing water and dirt stored in the bowl 11. At this time, by gradually opening the on-off valve with jet flow control function 22J, the air accumulated in the jet water supply pipe 21J can be discharged from the jet nozzle 15 together with a relatively small flow of washing water. When the washing water having a flow rate of is ejected, the energy of the washing water can be effectively used, so that the siphon action can be efficiently generated.
[0017]
After opening only the on-off valve with jet flow control function 22J for a predetermined time, the control device 27 gradually opens only the on-off valve with flow control function for rim 22R until a predetermined opening degree is reached. Is held for a predetermined time, and the rim cleaning is performed after the flow rate characteristics shown in FIG. When the rim on-off valve with flow control function 22R is opened, after passing through the water stopcock 40 and the pressure reducing valve 23, the washing water that has been stopped by the on-off valve with rim flow control function 22R is removed from the rim. Water is discharged from the rim nozzle 13 to the water conduit 12 via the atmosphere release valve 24R, and stored in the bowl 11. At this time, similarly to the pre-rim cleaning, by gradually opening the on-off valve 22R with the flow rate adjusting function for the rim, the air accumulated in the rim water supply pipe 21R is removed together with the cleaning water having a relatively small flow rate and the rim nozzle. Since it is possible to discharge the cleaning water from the cleaning water 13, it is possible to reduce the noise generated when the cleaning water is discharged when air is entrained in the cleaning water having a relatively large flow rate. Note that the post-rim cleaning is performed by predicting the time in which the cleaning water is stored in the bowl 11 in advance, and opening the on-off valve 22R with the rim flow rate control function for that time.
[0018]
As described above, the cleaning operation is performed by a series of operations such as cleaning of the bowl 11 by pre-rim cleaning, discharge of waste by jet cleaning, and accumulation of cleaning water in the bowl 11 by post-rim cleaning.
[0019]
Subsequently, the anti-freezing operation in the first embodiment will be described.
When the user presses the anti-freezing operation button 26B, the control device 27 opens both the rim flow control on-off valve 22R and the jet flow control on-off valve 22J by a predetermined opening degree to reduce a small amount. The cleaning water is supplied, and the freezing prevention operation having the flow rate characteristics shown in FIG. 5 is performed. The flow rate of the washing water supplied at this time is substantially constant since the pressure of the water supply source is reduced to a predetermined pressure by the pressure reducing valve 23 even when the pressure of the water supply source fluctuates. The antifreeze operation is continued until the user presses the antifreeze operation button 26B again.
[0020]
Next, a second embodiment of the present invention will be described with reference to the drawings. Here, only portions different from the first embodiment will be described. FIG. 2 is a side sectional view of a toilet provided with a water supply / cleaning device according to the second embodiment.
[0021]
The configuration of the second embodiment includes a jet opening / closing valve 25J in which the opening cannot be adjusted but a jet opening / closing valve 25J that cannot be adjusted in the middle of the jet water supply pipe 21J of the cleaning water supply device 20A. Others are the same as the first embodiment.
[0022]
Subsequently, a cleaning operation in the second embodiment will be described.
When the cleaning button 26A is pressed by the user, the control device 27 first opens only the rim flow control function-equipped on-off valve 22R for a predetermined time to perform pre-rim cleaning, and then only opens the jet on-off valve 25J. Jet cleaning is performed by opening the valve only for a predetermined time, and finally, only the opening / closing valve 22R with a flow rate adjusting function for rim is opened for a predetermined time to perform post-rim cleaning, thereby completing a series of operations. Since the post-rim cleaning is the same cleaning operation as in the first embodiment, only the jet cleaning will be described here.
[0023]
After the front rim cleaning, the control device 27 performs jet cleaning by opening only the jet on-off valve 25J. However, since the jet on-off valve 25J cannot adjust the opening degree, the flow characteristics shown in FIG. 6 are obtained. . When the jet on-off valve 25J is opened, the washing water that has been stopped by the jet on-off valve 25J after passing through the water stopcock 40 and the pressure reducing valve 23 passes through the jet air release valve 24J. The water is jetted from the jet nozzle 15 to the trap drainage channel 14 to fill the trap drainage channel 14 with water and induce a siphon action, thereby discharging the washing water and dirt stored in the bowl 11. At this time, since the air collected in the jet water supply pipe 21J is caught in the washing water, the siphon effect cannot be efficiently generated.
[0024]
Subsequently, an antifreezing operation in the second embodiment will be described.
When the anti-freezing operation button 26B is pressed by the user, the control device 27 opens only the rim flow control function-equipped on-off valve 22R by a predetermined opening to supply a small amount of washing water, as shown in FIG. Perform the anti-freezing operation of the flow characteristics. The flow rate of the washing water supplied at this time is substantially constant since the pressure of the water supply source is reduced to a predetermined pressure by the pressure reducing valve 23 even when the pressure of the water supply source fluctuates. The antifreeze operation is continued until the user presses the antifreeze operation button 26B again.
[0025]
Next, a third embodiment of the present invention will be described with reference to the drawings. Here, only portions different from the first embodiment will be described. FIG. 3 is a side sectional view of a toilet provided with a water supply / washing device according to a third embodiment.
[0026]
The configuration of the third embodiment includes a rim on-off valve 25R that cannot adjust the opening, instead of an on-off valve with a flow rate adjustment function that can adjust the opening, in the middle of the rim water supply pipe 21R of the cleaning water supply device 20A. Others are the same as the first embodiment.
[0027]
Subsequently, a cleaning operation in the third embodiment will be described.
When the cleaning button 26A is pressed by the user, the control device 27 first opens only the rim on-off valve 25R for a predetermined time to perform the pre-rim cleaning, and then only controls the jet flow control function-equipped on-off valve 22J. Jet cleaning is performed by opening the valve only for a predetermined time, and finally, only the rim on-off valve 25R is opened for a predetermined time to perform post-rim cleaning, thereby completing a series of operations. Since the cleaning operation is the same as the example, and the post-rim cleaning is substantially the same as the pre-rim cleaning, only the pre-rim cleaning will be described here.
[0028]
When the user presses the cleaning button 26A, the control device 27 opens only the rim on-off valve 25R to perform rim cleaning. However, since the rim on-off valve 25R cannot be adjusted in opening degree, it is shown in FIG. Flow characteristics. When the rim on-off valve 25R is opened, after passing through the water stopcock 40 and the pressure reducing valve 23, the washing water stopped by the rim on-off valve 25R is passed through the rim air release valve 24R. Water is discharged from the rim nozzle 13 into the water guide channel 12, flows down while washing the bowl 11, and flows into the trap drain channel 14. At this time, since the air accumulated in the rim water supply pipe 21R is caught in the washing water, noise is generated when the washing water is discharged.
[0029]
Subsequently, an antifreezing operation in the third embodiment will be described.
When the anti-freezing operation button 26B is pressed by the user, the control device 27 opens only the on-off valve 22J with a jet flow rate adjusting function by a predetermined opening to supply a small amount of washing water, and is shown in FIG. Perform the anti-freezing operation of the flow characteristics. The flow rate of the washing water supplied at this time is substantially constant since the pressure of the water supply source is reduced to a predetermined pressure by the pressure reducing valve 23 even when the pressure of the water supply source fluctuates. The antifreeze operation is continued until the user presses the antifreeze operation button 26B again.
[0030]
Next, a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a side sectional view of a toilet provided with a water supply / cleaning device according to the fourth embodiment.
In FIG. 8, the toilet 10 is a ceramic flush toilet, and a flush water supply device 20 for supplying flush water to the toilet 10 is attached to an upper rear portion. The flush water supply device 20 is protected by a cover 30. Have been. The toilet 10 is a so-called siphon jet toilet, and is provided around a bowl 11 to guide washing water to the bowl 11, a rim nozzle 13 for spouting washing water to the water guiding channel 12, and a rim nozzle 13 inside the bowl 11. The system includes a trap drain 14 for discharging cleaning water and waste to a drain pipe (not shown) provided on the floor of the toilet, and a jet nozzle 15 for jetting the cleaning water to the trap drain.
[0031]
The flush water supply device 20 is integrally formed with a water stopcock 40 connected to a water supply source (not shown) whose upstream side is disposed on a wall surface, and a pressure reducing valve 23 for obtaining a predetermined pressure regardless of the pressure of the water supply source. And an on-off valve 22 with a flow rate control function that is arranged downstream of the pressure reducing valve 23 and that can adjust the opening for supplying or stopping the wash water, and a supply of the wash water that is disposed downstream of the on-off valve 22 with the flow rate control function From the pressure reducing valve 23 to the rim water supply pipe 21R connected to the rim nozzle 13 or the jet water supply pipe 21J connected to the jet nozzle 15, When the supply of the cleaning water to the rim nozzle 13 is stopped in the middle of the connecting pipe 21S connecting the switching valve 28 and the rim water supply pipe 21R, the pressure downstream of the switching valve 28 is reduced to atmospheric pressure. Rim opening to An atmosphere opening valve 24R and a jet atmosphere for releasing the pressure downstream of the switching valve 28 to the atmosphere when the supply of the cleaning water to the jet nozzle 15 is stopped in the middle of the jet water supply pipe 21J. An operation switch 26 having an opening valve 24J, a cleaning button 26A to which a cleaning command is input by a user, and an anti-freezing operation button 26B to which an instruction for anti-freezing operation is input, and based on an input to the operation switch 26 A control device 27 is provided for controlling the opening / closing and opening of the on-off valve 22 with a flow rate adjusting function and the switching of the switching valve 28.
[0032]
9 shows the switching valve 28 in the rim water supply pipe 21R side opened state, FIG. 10 shows the switching valve 28 in the jet water supply pipe 21J side opened state, and FIG. 11 shows the switching valve 28 in both the water supply pipes 21R, 21J side opening. Indicates the status. As shown in FIGS. 9 to 11, the switching valve 28 includes a casing 28C including a branch pipe 21 into which the washing water flows, a rim water pipe 21R and a jet water pipe 21J from which the washing water flows, and a casing 28C. A top 28K for discharging the washing water which is stored in the branch pipe 21 and flows into one or both of the rim water supply pipe 21R and the jet water supply pipe 21J, and a motor (not shown) for switching and driving the top 28K. .
[0033]
The flow rate of the washing water supplied from the rim nozzle 13 and the jet nozzle 15 is reduced even if the pressure of the water supply source fluctuates because the on-off valve 22 with the flow rate adjusting function is provided downstream of the pressure reducing valve 23. Since the pressure is reduced to a predetermined pressure by the valve 23, it depends only on the opening degree of the on-off valve 22 with the flow rate adjusting function, and the fluctuation is extremely small if the opening degree is constant. Therefore, by controlling the opening of the on-off valve 22 with the flow rate adjusting function by the control device 27, it is possible to obtain a desired flow rate and flow rate characteristics. The on-off valve 22 with a flow rate adjusting function is an electromagnetic on-off valve capable of adjusting the opening degree using a stepping motor or the like. It may be. In addition, a pressure adjusting mechanism that obtains a predetermined pressure regardless of the pressure of the water supply source may be other than the pressure reducing valve 23, and the structure of the switching valve 28 may be a plurality of as disclosed in, for example, JP-A-2001-26961. The opening and closing valve may be configured to be opened and closed by a motor via a cam. Further, the on-off valve 22 with the flow rate adjusting function and the switching valve 28, and further, the rim atmosphere release valve 24R and the jet atmosphere release valve 24J may be integrally connected to form a unit.
[0034]
Subsequently, a cleaning operation in the fourth embodiment will be described.
When the washing button 26A is pressed by the user, the control device 27 drives and controls the top 28K to open the rim water supply pipe 21R side as shown in FIG. After the valve 22 is gradually opened to a predetermined opening, the opening is held for a predetermined time, and the front rim cleaning having the flow characteristics shown in FIG. 4 is performed. When the on-off valve 22 with the flow control function is opened, the washing water that has been stopped by the on-off valve 22 with the flow control function after passing through the water stopcock 40 and the pressure reducing valve 23 is used for the switching valve 28 and the rim. The water is discharged from the rim nozzle 13 to the water conduit 12 via the atmosphere release valve 24R, flows down while washing the bowl 11, and flows into the trap drainage path 14. At this time, by gradually opening the on-off valve 22 with the flow rate adjusting function, the flow rate of the wash water discharged from the rim nozzle 13 is gradually increased from the start of the supply to a predetermined flow rate at which the wash water reaches the entire bowl 11. Let it. By doing so, the air accumulated in the rim water supply pipe 21R can be discharged from the rim nozzle 13 together with the relatively small flow rate of the wash water, so that the air is trapped in the relatively large flow rate of the wash water. It is possible to reduce noise at the time of discharging the cleaning water.
[0035]
Next, the control device 27 controls the drive of the top 28K while holding the on-off valve 22 with the flow rate adjusting function at a predetermined opening to open the switching valve 28 on both sides of the water supply pipes 21R and 21J as shown in FIG. Then, the jet cleaning is performed by switching to a state in which only the jet water supply pipe 21J side is opened as shown in FIG. When the switching valve 28 is switched to the open state on the jet water supply pipe 21J side, the washing water supplied to the rim water supply pipe 21R is transferred from the jet nozzle 15 to the trap drain passage 14 Then, the trap drainage path 14 is filled with water to induce a siphon action, and the washing water and filth stored in the bowl 11 are discharged. At this time, the switching valve 28 passes through a state in which both sides of the water supply pipes 21R and 21J are opened in the process of switching from the rim water supply pipe 21R side open state to the jet water supply pipe 21J side open state. Since the air accumulated in 21J can be discharged from the jet nozzle 15 together with the relatively small flow rate of washing water, when the jet water supply pipe 21J is completely opened and the predetermined flow rate of washing water is jetted out The energy of the washing water can be effectively used, the siphon action can be efficiently generated, and the supply of the washing water is not stopped, so that the occurrence of the water hammer phenomenon can be suppressed.
[0036]
Lastly, the control device 27 drives and controls the top 28K while keeping the opening / closing valve 22 with the flow rate adjusting function at a predetermined opening, and opens the switching valve 28 on both sides of the water supply pipes 21R and 21J shown in FIG. The state is switched to the rim water supply pipe 21R side open state shown in FIG. When the switching valve 28 is switched to the rim water supply pipe 21R side open state, the washing water supplied to the jet water supply pipe 21J flows from the rim nozzle 13 to the water conduit 12 via the rim air release valve 24R. Water is discharged and stored in the bowl 11. At this time, the switching valve 28 passes through a state in which both sides of the water supply pipes 21R and 21J are opened in the process of switching from the state in which the jet water supply pipe 21J is opened to the state in which the rim water supply pipe 21R is opened. Since the air accumulated in the 21R can be discharged from the rim nozzle 13 together with the relatively small flow rate of the cleaning water, the noise at the time of discharging the cleaning water generated by the air being caught in the relatively high flow rate of the cleaning water is reduced. In addition to this, the supply of the washing water is not stopped, so that the occurrence of the water hammer phenomenon can be suppressed. Note that the post-rim cleaning is performed by predicting the time for storing the cleaning water in the bowl 11 in advance, and opening the on-off valve 22 with the flow rate adjusting function for that time.
[0037]
As described above, the cleaning operation is performed by a series of operations such as cleaning of the bowl 11 by pre-rim cleaning, discharge of waste by jet cleaning, and accumulation of cleaning water in the bowl 11 by post-rim cleaning.
[0038]
Subsequently, an antifreezing operation in the fourth embodiment will be described.
When the user presses the freeze prevention operation button 26B, the control device 27 drives and controls the top 28K to set the switching valve 28 in a state where both sides of both the water supply pipes 21R and 21J are opened as shown in FIG. A small amount of washing water is supplied to both the rim water supply pipe 21R and the jet water supply pipe 21J by gradually opening the on-off valve 22 with the flow rate adjusting function until a predetermined opening degree is reached, and the flow rate characteristics shown in FIG. Perform anti-freezing operation. The flow rate of the washing water supplied at this time is substantially constant since the pressure of the water supply source is reduced to a predetermined pressure by the pressure reducing valve 23 even when the pressure changes. The antifreeze operation is continued until the user presses the antifreeze operation button 26B again.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a toilet provided with a water supply / washing device according to a first embodiment.
FIG. 2 is a side sectional view of a toilet provided with a water supply / cleaning device according to a second embodiment.
FIG. 3 is a side sectional view of a toilet provided with a water supply / washing device according to a third embodiment.
FIG. 4 is a flow rate characteristic diagram when an on-off valve with a flow rate adjusting function capable of adjusting an opening degree is used.
FIG. 5 is a flow rate characteristic diagram in the case of an antifreeze operation.
FIG. 6 is a flow rate characteristic diagram when an on-off valve whose opening degree cannot be adjusted is used.
FIG. 7 is a flow rate characteristic diagram of a conventional cleaning water supply device.
FIG. 8 is a side sectional view of a toilet provided with a water supply / washing device according to a fourth embodiment.
FIG. 9 is a view showing a state in which the rim water supply pipe side of the switching valve is open.
FIG. 10 is a diagram showing a state in which the jet water supply pipe side of the switching valve is open.
FIG. 11 is a state diagram in which both water supply pipe sides of the switching valve are open.
[Explanation of symbols]
10. Toilet bowl
11 ... Bowl
12 ... Headrace
13 ... Rim nozzle
14… Trap drainage channel
15 ... Jet nozzle
20, 20A, 20B ... washing water supply device
21 ... Branch pipe
21R ... Rim water pipe
21J ... Jet water pipe
21S ... connecting pipe
22 ... On-off valve with flow control function
22R: On-off valve with flow adjustment function for rim
22J: On-off valve with flow control function for jet
23 ... Reducing valve
24R ... Air release valve for rim
24J ... Air release valve for jet
25R: On-off valve for rim
25J ... Jet open / close valve
26 ... Operation switch
26A: Cleaning button
26B ... Freeze prevention operation button
27 ... Control device
28 ... Switching valve
28C ... casing
28K… Top
30 ... Cover
40 ... water stopcock
