JP4111583B2 - Freezing prevention method in washing apparatus and washing apparatus - Google Patents

Freezing prevention method in washing apparatus and washing apparatus Download PDF

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JP4111583B2
JP4111583B2 JP08874998A JP8874998A JP4111583B2 JP 4111583 B2 JP4111583 B2 JP 4111583B2 JP 08874998 A JP08874998 A JP 08874998A JP 8874998 A JP8874998 A JP 8874998A JP 4111583 B2 JP4111583 B2 JP 4111583B2
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cleaning
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JPH11285672A (en
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博 伝田
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MK Seiko Co Ltd
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MK Seiko Co Ltd
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Description

【0001】
【産業上の利用分野】
この発明は、被洗浄体に向けて洗浄水を放出して洗浄をはかる洗浄装置に関し、特に洗車装置のように屋外設置され冬季の凍結防止措置が必要とされるタイプの洗浄装置に関する。
【0002】
【従来の技術】
従来より知られる洗浄装置における凍結防止措置の方法としては、例えば実開昭60−136783号公報に見られるように、少量の洗浄水を洗浄ノズルより放出させ、その水流により凍結を防止する方法が一般的である。また、特開昭61−98833号公報に見られるように、洗浄作業が終了すると洗浄管路に圧縮空気を導入して、管路の水抜きにより凍結を防止する方法が知られている。
【0003】
【発明が解決しようとする課題】
ところで、前者の水流により凍結防止する方法では、洗浄ノズルより絶え間なく洗浄水を放出させる必要があり、多量の水を消費するばかりか、放出した水がノズル周囲の地面等で凍結し洗浄作業に支障を生じるなどの問題があった。特に、極寒の地では、水源から得る洗浄水の水温が低く少量の放水では凍結してしまうため、装置内で加熱して温水を放出する必要があり、膨大な加熱エネルギーを水と同時に消費してしまう欠点があった。
【0004】
また、後者の圧縮空気により水抜きする方法では、コンプレッサ等の付属設備が必要となる上、コンプレッサの運転音や圧縮空気の排気音が大きく騒音問題を起こす懸念があり、また、管路内を乾燥させる程の完全な水抜きが不可能であるため、わずかな残留水でも洗浄ノズルで凍結すると、ノズルが放出不能に陥るという問題があった。しかも、圧縮空気をノズルから開放する際に、放出部で局部的な温度低下を招き、ノズル部での残留水の凍結を促進してしまう欠点もあった。
【0005】
従って、この発明の課題とするところは、流水による多量の水や加熱エネルギーの消費がなく、しかもコンプレッサー等の大きな付属設備も必要とせずに、効果的な洗浄装置における凍結防止措置ができないか、という点にある。
【0006】
【課題を解決するための手段】
この発明は、タンクに貯えられた洗浄水を圧送して洗浄ノズルから被洗浄体に放出させる洗浄装置において、凍結防止措置に際し、ポンプを駆動して装置内に形成される循環管路において洗浄水を循環させ、この循環管路の流路に臨ませるように洗浄ノズルへ至る洗浄管路を接続し、洗浄水を循環させることにより洗浄管路側へ負圧を発生させ、前記循環管路に洗浄水を循環させるポンプとして、洗浄の際に洗浄水を圧送するための高吐出ポンプまたは高圧ポンプの他に、低圧または低吐出の循環ポンプを使用可能とし、凍結防止措置に際し、高吐出ポンプまたは高圧ポンプにより洗浄水を循環管路で高速循環させて洗浄管路の残留水を回収した後に、循環ポンプにより洗浄水を循環管路で低速循環させて洗浄管路より洗浄ノズルを介して外気を吸引させるようにすることを特徴として、上記課題の解決をはかったものである。
【0007】
ここで、前記循環管路には流路の絞り部から下流側へ行くに従い流路が広がるディフューザが形成され、このディフューザの絞り部またはその下流側に前記洗浄管路を臨ませて、洗浄管路より外気を吸引させるようにすれば良い。
【0008】
この発明は、タンクに貯えられた洗浄水を圧送して洗浄ノズルから被洗浄体に放出させる洗浄装置において、タンクから洗浄ノズルへ洗浄水を送出する洗浄管路と、該洗浄管路に設けられる高吐出ポンプまたは高圧ポンプと、洗浄管路における高吐出ポンプまたは高圧ポンプより上流側に設けられる循環ポンプと、洗浄管路における高吐出ポンプまたは高圧ポンプの下流側から分岐してタンクから送出する洗浄水をタンクに帰還させる循環管路と、洗浄管路における循環管路の分岐よりも下流側から分岐して循環管路に接続する分岐路と、該分岐路と循環管路の接続点に設けられ、循環管路と二方で接続し他の一方は分岐路に臨み負圧を生じる負圧ポートを形成する三方接続具と、洗浄管路・循環管路・分岐路の各管路を開閉する電磁弁と、凍結防止措置として前記循環管路に洗浄水を循環させる制御手段とを備え、該制御手段では、凍結防止措置に際し、循環管路と分岐路の電磁弁を開いてから高吐出ポンプまたは高圧ポンプを駆動してタンクの洗浄水を循環管路で高速循環させ、洗浄管路における電磁弁よりも下流側に残留する洗浄水を三方接続具の負圧ポートに接続した分岐路を通じて回収し、この後に前記循環ポンプにより洗浄水を低速循環させ、三方接続具の負圧ポートに接続した分岐路を通じて洗浄管路より洗浄ノズルを介して外気を吸引すること特徴として、上記課題を解決した洗浄装置を提供するものである。
【0009】
この洗浄装置において、前記三方接続具は、前記循環管路にあって流路の絞り部から下流側へ行くに従い流路が広がるディフューザを形成し、このディフューザの絞り部またはその下流側に連通して前記負圧ポートを形成して前記洗浄管路と接続するようにすれば良い。
【0010】
【作用】
この発明によれば、洗浄水を循環させることにより洗浄管路側へ負圧を発生させ、洗浄管路より洗浄ノズルを介して外気を吸引させることにより、洗浄管路内で残留水が凍結しても、洗浄管路内に吸気による通気路を常時確保し洗浄水が放出不能になるのを防止するものである。これにより、洗浄水を循環させることにより装置内の管路の凍結防止ができる上、この洗浄水の循環に伴い洗浄管路が凍結により使用不能になるのを防止できる。
【0011】
ここで洗浄水を循環させるポンプは、洗浄作業に用いられる高吐出ポンプまたは高圧ポンプを使用することができ、凍結防止のために特別にポンプを追加設置することなく、経済的に本発明を実施できる。なお、ポンプの耐久性や消費電力等を考慮して、低圧または低吐出の循環ポンプ(洗浄用の高圧ポンプまたは高吐出ポンプより吐出圧または吐出量が低い小型のもの)を使用しても良い。更に、高圧ポンプまたは高吐出ポンプと低圧または低吐出の循環ポンプの両方を洗浄水の循環に使用できるようにすれば、まず高圧ポンプまたは高吐出ポンプにより洗浄水を高速循環させて洗浄管路の残留水を素早く回収し、この後に前記循環ポンプにより洗浄水を低速循環させて洗浄管路より洗浄ノズルを介して外気を継続して吸引させるようにすることができる。また、洗浄水を循環させる流路に、その流路を絞りそこから下流側へ行くに従い流路が広がるディフューザを臨ませ、このディフューザの絞り部またはその下流側に洗浄管路を接続させて、洗浄管路に通気させるに充分な負圧を発生させるようにすれば良い。
【0012】
【実施例】
以下、その実施例について図面を基に詳細に説明する。
図1は実施例の構成説明図で、1は洗浄装置本体である。洗浄装置本体1には、水源2からの洗浄水を貯える水タンク3、水タンク3へ供給する洗浄水および水タンク3に貯えた洗浄水を加熱する温水装置4、水タンク3から洗浄ノズル5へ至る洗浄管路6に設けられる複数連のプランジャポンプからなる高圧ポンプ7が備えられている。水タンク3の洗浄水は、水源2の水温が低い冬季には温水装置4で加熱されて供給され、更に温水装置4により所定温度以上に保温される。8は水タンク3の洗浄水を保温するに際し温水装置4に洗浄水を循環させるポンプである。
【0013】
洗浄装置本体1内の管路について見ると、10は公知のロータリポンプからなり高圧ポンプより吐出圧・吐出量共に低い循環ポンプ11を設け、水タンク3から洗浄管路5の高圧ポンプ7より上流側(ポンプ7吸込側)に接続する分岐路、12は洗浄管路5の高圧ポンプ7より下流側(ポンプ7吐出側)から水タンク3へ至る帰還路で、これにより循環ポンプ11で圧送される洗浄水を高圧ポンプ7を介して帰還路12へ送り水タンク3へ戻す循環管路13が形成される。14は帰還路12より分岐し洗浄管路6の下流側(ノズル5側)へ接続する分岐路で、凍結防止措置に際し洗浄ノズル5より吸気するのに使用される。15・16・17はいずれも電磁弁で、15は洗浄管路6の帰還路12及び分岐路14との接続ポイントの間に、16は帰還路12に、17は分岐路14にそれぞれ位置する。18は洗浄管路6にあって分岐路10と並列になる部分に設けられる逆止弁である。
【0014】
20は帰還路12と分岐路14との接続ポイントに設けられる三方接続具で、以下その構成を図2を用いて説明する。21は帰還路12の上流側に接続するプラグで、その内部流路に絞り部Sを形成しており、22はこのプラグ21と螺合接続され帰還路12の下流側に接続するケーシングで、その内部流路として上流から下流に行くに従い流路が広がるディフューザ部Dと、このディフューザ部Dと絞り部Sとの間に位置し負圧ポート23からの流体を混入させるミキシング部Mとを形成している。ここで、プラグ21側から圧送される洗浄水は、絞り部Sで流路が狭められて流速を増してからディフューザ部Dへ放出される。この放出された洗浄水は、拡散・減速されミキシング部Mにおいて負圧ポートから送られる流体を巻き込むようにしてディフューザ部D下流へ送られ、結果として分岐路14を介して洗浄管路6の残留水およびノズル5からの空気を吸い込むよう作用する。
【0015】
図3は上記実施例の制御系を示すブロック図で、30はマイクロコンピュータを含む制御部、31は洗浄の開始/停止入力等を行う操作パネル、32は気温を検出して凍結防止措置の要否を判断するための温度センサである。図4は上記実施例における凍結防止措置の動作を示すタイムチャート図で、以下この両図を基に実施例の動作を説明する。
【0016】
操作パネル31で洗浄開始の入力があると、制御部30ではまず電磁弁15・16を開弁させ、少し遅れて高圧ポンプ7を駆動させ、この後洗浄開始から一定時間T1が経過すると、電磁弁16を閉じて洗浄ノズル5より高圧の洗浄水を噴射させて洗浄動作を可能にする。高圧ポンプ7の駆動を電磁弁15・16の開弁より遅らせるのは、電磁弁が開ききらない内にポンプ7が駆動して管路内に異常高圧が発生するのを防止し、また水圧に晒されずに電磁弁を円滑に開弁動作させる目的がある。また、一定時間T1だけ電磁弁16を開くのは、やはり洗浄管路6内に急激な水圧上昇が生じないよう配慮したものであるが、ポンプ7の駆動に伴い急激に洗浄ノズル5より洗浄水が噴射され、ノズル5に大きな噴射反力が生じるのを防止する意図もある。例えば、洗浄ノズル5として手持ちタイプのスプレー銃を使用する装置では、ポンプ7の駆動に伴う反動でスプレー銃の方向を失い、意図せぬ方向へ洗浄水を飛散させる等の問題を解消するものである。
【0017】
操作パネル31で停止入力があるか、制御部30での所定の洗浄シーケンスを終了すると、まず高圧ポンプ7を停止し少し遅れて電磁弁15を閉じて洗浄動作を終了する。洗浄終了すると、制御部30では温度センサ32で与える気温により凍結防止措置の要否を判断し、気温が所定温度以下で凍結防止措置が必要と判断すると、電磁弁16・17を開き循環ポンプ11を駆動して凍結防止措置を実行する。なお、温度センサ32によらず、操作パネル31に凍結防止スイッチを設けて、このスイッチ入力により凍結防止措置を行うようにすることもできる。
【0018】
凍結防止措置に入ると、まず電磁弁16・17を開いた後、最初の一定時間T2だけ高圧ポンプ7を駆動して、水タンク3の洗浄水を循環管路13において高速循環させ、これにより電磁弁15より下流の洗浄管路6に残留する洗浄水を三方接続具20において回収する。一定時間T2が経過すると、高圧ポンプ7を停止し、代わりに循環ポンプ11を駆動して循環管路13における洗浄水の循環を低速に切り換え、洗浄ノズル5を介して洗浄管路6より外気を吸入する状態に移行する。これにより、循環管路13には洗浄水が循環して確実に凍結防止がはかられると共に、常時ノズル5を通して洗浄管路6に空気が流通するから、洗浄管路6内で残留水が凍っても、通気により流路が確保されるため、以後の洗浄動作時に凍結による管路詰まりを生じて洗浄不能となるといった不都合を招くことがない。
【0019】
なお、この実施例では、凍結防止措置に際して高圧ポンプ7と循環ポンプ11を併用しているが、耐久性の高い高圧ポンプ7が得られる場合、または耐久性に問題のない高吐出ポンプを使用する場合は、特に循環ポンプ11を使用することなく、凍結防止措置の間、高圧ポンプ7または代わりの高吐出ポンプを駆動して循環管路13に洗浄水を循環させるようにしても良い。こうすれば、循環ポンプ11を特に設ける必要がなくなり、より安価に装置を構成できる。なお、この時、電気代やポンプの耐久等の問題で高圧ポンプ7や高吐出ポンプの長時間の連続運転を避けたい場合は、凍結防止措置開始後の所定時間が経過した後は、ポンプを一定周期で間欠運転させる等の方法で断続運転に切り換えるようにすれば良い。また、もちろん、凍結防止措置で高圧ポンプ7を使用することなく、循環ポンプ11だけを最初から駆動して、残留水の回収から通気までを継続して行わせるようにすることもできる。
【0020】
図5は他の実施例の構成を示す説明図で、例えば公知の自動洗車機のように、複数の洗浄ノズル5a〜5cを切り換えて使用するような洗浄装置に本発明を実施した例を示している。ここでは、切換使用する洗浄ノズルの系統毎に洗浄管路6a・6bを分岐させ、それぞれに電磁弁15a・15bを設けている。また、これに伴い三方接続具20の負圧ポート23に接続する分岐路14a・14bも分岐して洗浄管路6a・6bに接続し、それぞれ電磁弁17a・17bを設けている。なお、制御系は図3の例と同様のものであり、ここでは省略する。
【0021】
この実施例では、循環ポンプ11を特に備えず、洗浄に使用される高吐出ポンプ70を用いて凍結防止措置をも行うものであり、その動作を図6を用いて説明する。
【0022】
洗浄動作は、図示のように、洗浄ノズル5aを使用する場合には電磁弁15aを開いてから高吐出ポンプ70を駆動し、洗浄ノズル5a・5bの系統を使用する場合は電磁弁15a・15bを開いてから高吐出ポンプ70を駆動して行われる。このとき、図4の例と同様に、ポンプ70の駆動初期に電磁弁16を開いて管路内の逃圧操作を行えば、放水の立ち上がりがソフトで管路に負担をかけない動作ができる。
【0023】
凍結防止措置に入ると、電磁弁15a・15bが閉じられる一方で電磁弁16が開弁されポンプ70が駆動される。そして、図示のように、電磁弁17a・17bが所定時間T3ずつ交互に開弁されて、洗浄管路6a・6bに対して残留水の回収と通気とが順番に行われ、複数の洗浄管路6a・6bの凍結防止がはかられるのである。なお、ここで、図1の例のように循環ポンプを備えている場合は、ポンプ70を駆動しての残留水の回収と通気とを1回ないし数回ずつ行った後に、ポンプ70を止め循環ポンプによる通気に切り換えるように使用すれば良い。
【0024】
この発明は以上のように実施できるもので、凍結防止措置に際し、循環ポンプ11または高吐出ポンプ70を駆動して、装置内に形成される循環管路13に洗浄水を循環させ、この循環管路13の流路に臨ませるように洗浄ノズル5へ至る洗浄管路6を接続し、洗浄水を循環させることにより洗浄管路6側へ負圧を発生させ、洗浄管路6より残留水を回収すると共に洗浄ノズル5を介して外気を吸引させ、洗浄ノズル5と洗浄管路6との凍結防止をはかるものである。
【0025】
なお、上記実施例では、洗浄管路6の高圧ポンプ7または高吐出ポンプ70の下流側を分岐した帰還路12に三方接続具20を設けているが、三方接続具20を洗浄管路6と帰還路12との接続ポイントに設けて、その負圧ポート23を直接洗浄管路6に接続するよう構成しても良い。この場合、高圧ポンプ7または高吐出ポンプ70で圧送され洗浄ノズル5より放出される洗浄水は負圧ポート23を通るため、図2の実施例構成では負圧ポート23へ至る管路抵抗が大きくなるため、もう少し管路抵抗の小さな構造とする必要がある。
【0026】
【発明の効果】
以上の説明から明らかなように、洗浄水を循環させることにより洗浄管路側へ負圧を発生させ、洗浄管路より残留水を回収すると共に洗浄ノズルを介して外気を吸引させることにより、洗浄管路内でわずかな残留水が凍結しても、洗浄管路内に吸気による通気路を常時確保し洗浄水が放出不能になるのを防止するので、洗浄水を循環させることにより装置内の循環管路の凍結防止ができる上、この洗浄水の循環に伴い洗浄ノズルに至る洗浄管路が凍結により使用不能になるのを防止できる。そして、こうして行われる凍結防止措置は、従来のように洗浄水の垂れ流しによる多量の水や加熱エネルギーの消費がなく、また圧縮空気で管路の水抜きをするためのコンプレッサー等の大きな付属設備も必要とせず、極めて経済的でクリーンな凍結防止措置が実現できるものである。
【0027】
なお、洗浄作業に用いられる高吐出ポンプまたは高圧ポンプを使用して、循環管路に洗浄水を循環させるようにすれば、凍結防止のために特別にポンプを追加設置することなく、経済的に本発明を実施できる。また、高吐出ポンプまたは高圧ポンプとは別に設けた低圧または低吐出の循環ポンプを使用することができ、こうすれば耐久性に難のある高吐出ポンプまたは高圧ポンプを酷使することがなく、長期間安定して使用することができ、また電気代等のランニングコストも低減できる。
【0028】
更に、高圧ポンプまたは高吐出ポンプと低圧または低吐出の循環ポンプの両方を洗浄水の循環に使用できるようにすれば、まず高圧ポンプまたは高吐出ポンプにより洗浄水を高速循環させて洗浄管路の残留水を素早く回収し、この後に前記循環ポンプにより洗浄水を低速循環させて洗浄管路より洗浄ノズルを介して外気を継続して吸引させるようにすることができ、より効果的に凍結防止できると共に、ポンプの耐久性とランニングコストとをバランスさせることができる。
【図面の簡単な説明】
【図1】実施例の構成説明図である。
【図2】実施例要部の断面説明図である。
【図3】実施例の制御系を示すブロック図である。
【図4】実施例の動作を説明するタイムチャート図である。
【図5】他の実施例の構成説明図である。
【図6】他の実施例の動作を説明するタイムチャート図である。
【符号の説明】
1 洗浄装置本体
5 洗浄ノズル
6 洗浄管路
7 高圧ポンプ
11 循環ポンプ
13 循環管路
20 三方接続具
30 制御部
70 高吐出ポンプ
D ディフューザ部
S 絞り部
[0001]
[Industrial application fields]
The present invention relates to a cleaning apparatus that discharges cleaning water toward an object to be cleaned, and particularly relates to a cleaning apparatus of a type that is installed outdoors and requires anti-freezing measures in winter, such as a car wash apparatus.
[0002]
[Prior art]
As a method for preventing freezing in a conventionally known cleaning apparatus, for example, as disclosed in Japanese Utility Model Laid-Open No. 60-136783, there is a method of discharging a small amount of cleaning water from a cleaning nozzle and preventing freezing by the water flow. It is common. Further, as can be seen in Japanese Patent Application Laid-Open No. 61-98833, there is known a method of preventing freezing by draining a pipe line by introducing compressed air into the washing line when the washing operation is completed.
[0003]
[Problems to be solved by the invention]
By the way, in the former method of preventing freezing by the water flow, it is necessary to discharge the washing water continuously from the washing nozzle, which not only consumes a large amount of water, but also the discharged water freezes on the ground around the nozzle for washing work. There were problems such as causing problems. Particularly in extremely cold areas, the temperature of the wash water obtained from the water source is low, and it will freeze if a small amount of water is discharged. Therefore, it is necessary to release the warm water by heating in the device, and consume enormous heating energy at the same time as the water. There was a drawback.
[0004]
In addition, the latter method of draining water with compressed air requires additional equipment such as a compressor, and there is a concern that the operating noise of the compressor and the exhaust noise of the compressed air may cause noise problems. Since it is impossible to completely drain the water so as to be dried, there is a problem that even if a small amount of residual water is frozen at the washing nozzle, the nozzle cannot be discharged. In addition, when the compressed air is released from the nozzle, there is a disadvantage that a local temperature drop is caused in the discharge portion and freezing of residual water in the nozzle portion is promoted.
[0005]
Accordingly, the subject of the present invention is that there is no consumption of a large amount of water and heating energy by running water, and it is not necessary to have large auxiliary equipment such as a compressor, and effective anti-freezing measures in a cleaning device can be performed, It is in that point.
[0006]
[Means for Solving the Problems]
The present invention relates to a cleaning apparatus that pumps cleaning water stored in a tank and discharges the cleaning water from a cleaning nozzle to an object to be cleaned. In a freezing prevention measure, the cleaning water is driven in a circulation line formed in the apparatus by driving a pump. Is connected to the cleaning nozzle so as to face the flow path of the circulation pipe, and the washing water is circulated to generate a negative pressure on the washing pipe side, thereby washing the circulation pipe. As a pump that circulates water, a low-pressure or low-discharge circulation pump can be used in addition to a high-discharge pump or high-pressure pump for pumping wash water during cleaning, and a high-discharge pump or high-pressure pump can be used for anti-freezing measures. Remove the wash water by a pump after recovering the residual water of the washing pipe by fast circulated in the circulation conduit, through the washing nozzle from the washing pipe by slow circulated in the circulation pipe to the washing water by a circulation pump As characterized in that so as to suck the, in which attempted to solve the above problems.
[0007]
Here, the circulation pipe is formed with a diffuser that expands the flow path as it goes downstream from the throttle section of the flow path, and the cleaning pipe faces the throttle section of the diffuser or the downstream side of the diffuser. The outside air may be sucked from the road.
[0008]
The present invention provides a cleaning apparatus that pumps cleaning water stored in a tank and discharges the cleaning water from a cleaning nozzle to an object to be cleaned, a cleaning pipe that sends the cleaning water from the tank to the cleaning nozzle, and the cleaning pipe. High-discharge pump or high-pressure pump, circulation pump provided upstream of the high-discharge pump or high-pressure pump in the cleaning line, and cleaning branched from the high-discharge pump or high-pressure pump downstream in the cleaning line and sent from the tank A circulation line for returning water to the tank, a branch line that branches from the downstream side of the circulation line in the cleaning line and connects to the circulation line, and a connection point between the branch line and the circulation line Open and close the three-way connector that forms a negative pressure port that connects to the circulation line in two directions and creates negative pressure on the other side and opens and closes each line of the washing line, circulation line, and branch line A solenoid valve to A control means for circulating wash water through the circulation pipe as an anti-settling measure. In the control means, the high discharge pump or the high-pressure pump is opened after opening the solenoid valves of the circulation pipe and the branch path for the anti-freezing measure. Drive to circulate the washing water in the tank at high speed in the circulation line and collect the washing water remaining downstream from the solenoid valve in the washing line through the branch line connected to the negative pressure port of the three-way connector. A cleaning device that solves the above problems is provided by circulating the cleaning water at a low speed by the circulation pump and sucking outside air from the cleaning pipe through the cleaning nozzle through the branch path connected to the negative pressure port of the three-way connector. To do.
[0009]
In this cleaning apparatus, the three-way connector forms a diffuser that extends in the circulation pipe as it goes downstream from the throttle part of the flow path, and communicates with the throttle part of the diffuser or the downstream side thereof. Then, the negative pressure port may be formed and connected to the cleaning pipe.
[0010]
[Action]
According to the present invention, the cleaning water is circulated to generate a negative pressure on the cleaning pipe side, and the outside water is sucked from the cleaning pipe through the cleaning nozzle, so that the residual water is frozen in the cleaning pipe. In addition, a ventilation passage by intake air is always secured in the cleaning pipe to prevent the cleaning water from being discharged. Thereby, it is possible to prevent the pipeline in the apparatus from freezing by circulating the washing water, and it is possible to prevent the washing pipeline from becoming unusable due to freezing along with the circulation of the washing water.
[0011]
Here, the pump for circulating the cleaning water can be a high discharge pump or a high-pressure pump used for cleaning work, and the present invention is economically implemented without additionally installing a pump to prevent freezing. it can. In consideration of the durability and power consumption of the pump, a low-pressure or low-discharge circulation pump (a small-sized pump having a discharge pressure or a discharge amount lower than that of a high-pressure pump for cleaning or a high-discharge pump) may be used. . Furthermore, if both the high-pressure pump or high-discharge pump and the low-pressure or low-discharge circulation pump can be used for the circulation of the washing water, the washing water is first circulated at a high speed by the high-pressure pump or the high-discharge pump. Residual water can be quickly recovered, and thereafter, the wash water can be circulated at a low speed by the circulation pump, and the outside air can be continuously sucked from the wash line through the wash nozzle. In addition, the diffuser that expands the flow path as it goes downstream from the flow path that circulates the wash water is faced, and the wash pipe line is connected to the throttle part of the diffuser or the downstream side, What is necessary is just to make it generate | occur | produce the negative pressure sufficient to ventilate a washing | cleaning pipe line.
[0012]
【Example】
Hereinafter, the embodiment will be described in detail with reference to the drawings.
FIG. 1 is an explanatory diagram of the configuration of the embodiment. Reference numeral 1 denotes a cleaning device main body. The cleaning device main body 1 includes a water tank 3 for storing cleaning water from the water source 2, a cleaning water supplied to the water tank 3, a hot water device 4 for heating the cleaning water stored in the water tank 3, and a cleaning nozzle 5 from the water tank 3. A high-pressure pump 7 comprising a plurality of plunger pumps provided in the cleaning pipe 6 leading to is provided. The washing water in the water tank 3 is heated and supplied by the hot water device 4 in winter when the water temperature of the water source 2 is low, and is further kept at a predetermined temperature or higher by the hot water device 4. A pump 8 circulates the washing water in the hot water device 4 when the washing water in the water tank 3 is kept warm.
[0013]
Looking at the pipe line in the cleaning apparatus main body 1, 10 is a known rotary pump, provided with a circulation pump 11 having a lower discharge pressure and discharge amount than the high pressure pump, and upstream from the high pressure pump 7 in the cleaning pipe line 5 from the water tank 3. A branch path 12 connected to the side (pump 7 suction side), 12 is a return path from the downstream side (pump 7 discharge side) to the water tank 3 from the high-pressure pump 7 of the cleaning pipe 5, and is thereby pumped by the circulation pump 11. A circulation line 13 is formed in which the wash water is fed to the return path 12 via the high-pressure pump 7 and returned to the water tank 3. Reference numeral 14 denotes a branch path that branches from the return path 12 and connects to the downstream side (nozzle 5 side) of the cleaning pipe 6 and is used to suck in air from the cleaning nozzle 5 during the freeze prevention measure. 15, 16, and 17 are electromagnetic valves, 15 is located between the connection points of the cleaning pipe 6 to the return path 12 and the branch path 14, 16 is located in the return path 12, and 17 is located in the branch path 14. . A check valve 18 is provided in a portion of the cleaning pipe 6 that is in parallel with the branch path 10.
[0014]
Reference numeral 20 denotes a three-way connector provided at a connection point between the return path 12 and the branch path 14, and the configuration thereof will be described below with reference to FIG. Reference numeral 21 denotes a plug connected to the upstream side of the return path 12, and a throttle portion S is formed in the internal flow path thereof. Reference numeral 22 denotes a casing that is screwed to the plug 21 and connected to the downstream side of the return path 12. As the internal flow path, there are formed a diffuser part D in which the flow path expands from upstream to downstream, and a mixing part M that is located between the diffuser part D and the throttle part S and mixes fluid from the negative pressure port 23 is doing. Here, the wash water pumped from the plug 21 side is discharged to the diffuser part D after the flow path is narrowed by the throttle part S to increase the flow velocity. The discharged wash water is diffused and decelerated, and is sent downstream of the diffuser part D so as to entrain the fluid sent from the negative pressure port in the mixing part M. As a result, the remaining of the wash pipe line 6 via the branch path 14 It acts to suck in water and air from the nozzle 5.
[0015]
FIG. 3 is a block diagram showing the control system of the above embodiment, 30 is a control unit including a microcomputer, 31 is an operation panel for inputting start / stop of washing, etc. 32 is a key to prevent freezing by detecting temperature. It is a temperature sensor for judging NO. FIG. 4 is a time chart showing the operation of the anti-freezing measure in the above embodiment. Hereinafter, the operation of the embodiment will be described with reference to both drawings.
[0016]
When there is an input to start cleaning on the operation panel 31, the control unit 30 first opens the solenoid valves 15 and 16 to drive the high-pressure pump 7 with a slight delay. The valve 16 is closed and high-pressure cleaning water is jetted from the cleaning nozzle 5 to enable the cleaning operation. The reason for delaying the driving of the high pressure pump 7 from the opening of the solenoid valves 15 and 16 is to prevent the pump 7 from being driven before the solenoid valve is fully opened and to generate an abnormally high pressure in the pipeline, and to increase the water pressure. The purpose is to smoothly open the solenoid valve without being exposed. The reason for opening the solenoid valve 16 for a certain time T1 is to prevent the water pressure from rising suddenly in the cleaning pipe 6. Is also intended to prevent a large injection reaction force from being generated in the nozzle 5. For example, in a device that uses a hand-held spray gun as the cleaning nozzle 5, the problem of losing the direction of the spray gun due to the reaction caused by the driving of the pump 7 and splashing the cleaning water in an unintended direction is solved. is there.
[0017]
When there is a stop input on the operation panel 31 or when a predetermined cleaning sequence in the control unit 30 is finished, the high-pressure pump 7 is first stopped, the electromagnetic valve 15 is closed a little later, and the cleaning operation is finished. When the cleaning is completed, the control unit 30 determines whether or not the freeze prevention measure is necessary based on the temperature given by the temperature sensor 32, and when the temperature is equal to or lower than the predetermined temperature and determines that the freeze prevention measure is necessary, the solenoid valves 16 and 17 are opened and the circulation pump 11 is opened. To prevent freezing. Instead of the temperature sensor 32, a freeze prevention switch may be provided on the operation panel 31, and a freeze prevention measure may be performed by inputting the switch.
[0018]
When the anti-freezing measure is entered, first, the solenoid valves 16 and 17 are opened, and then the high-pressure pump 7 is driven for the first predetermined time T2 to circulate the washing water in the water tank 3 in the circulation line 13 at a high speed. The washing water remaining in the washing pipeline 6 downstream from the electromagnetic valve 15 is collected at the three-way connector 20. When the fixed time T2 has elapsed, the high-pressure pump 7 is stopped, and instead, the circulation pump 11 is driven to switch the circulation of the washing water in the circulation line 13 to a low speed, and the outside air is discharged from the washing line 6 through the washing nozzle 5. Transition to inhalation state. As a result, the washing water circulates in the circulation line 13 and the freezing prevention is surely performed, and air always flows through the nozzle 5 to the washing line 6, so that the residual water is frozen in the washing line 6. However, since the flow path is ensured by ventilation, there is no inconvenience that the pipe line is clogged due to freezing during the subsequent cleaning operation and the cleaning becomes impossible.
[0019]
In this embodiment, the high-pressure pump 7 and the circulation pump 11 are used in combination for the freeze prevention measure. However, when the high-pressure pump 7 having high durability is obtained, or a high-discharge pump having no problem in durability is used. In this case, the washing water may be circulated through the circulation line 13 by driving the high-pressure pump 7 or an alternative high discharge pump during the freeze prevention measure without using the circulation pump 11. By doing so, it is not necessary to provide the circulation pump 11 in particular, and the apparatus can be configured at a lower cost. At this time, if you want to avoid long-term continuous operation of the high-pressure pump 7 or high-discharge pump due to problems such as electricity bills or durability of the pump, the pump should be turned off after a predetermined time has elapsed since the start of anti-freezing measures. What is necessary is just to make it switch to intermittent operation by the method of carrying out intermittent operation with a fixed period. Of course, it is also possible to drive only the circulation pump 11 from the beginning without using the high-pressure pump 7 as a freezing prevention measure so that the remaining water is continuously collected and vented.
[0020]
FIG. 5 is an explanatory diagram showing the configuration of another embodiment, and shows an example in which the present invention is implemented in a cleaning apparatus that switches between a plurality of cleaning nozzles 5a to 5c, such as a known automatic car wash machine. ing. Here, the cleaning pipelines 6a and 6b are branched for each cleaning nozzle system to be switched, and electromagnetic valves 15a and 15b are respectively provided. Accordingly, the branch paths 14a and 14b connected to the negative pressure port 23 of the three-way connector 20 are also branched and connected to the cleaning pipes 6a and 6b, and electromagnetic valves 17a and 17b are provided, respectively. The control system is the same as that in the example of FIG. 3, and is omitted here.
[0021]
In this embodiment, the circulation pump 11 is not particularly provided, and the high discharge pump 70 used for cleaning is also used to prevent freezing. The operation will be described with reference to FIG.
[0022]
As shown in the figure, in the cleaning operation, when the cleaning nozzle 5a is used, the solenoid valve 15a is opened and then the high discharge pump 70 is driven. When the system of the cleaning nozzles 5a and 5b is used, the solenoid valves 15a and 15b are operated. This is performed by driving the high discharge pump 70 after opening. At this time, similarly to the example of FIG. 4, if the solenoid valve 16 is opened at the initial driving stage of the pump 70 and the pressure relief operation in the pipeline is performed, the rise of water discharge is soft and an operation that does not impose a burden on the pipeline can be performed. .
[0023]
When the freeze prevention measure is entered, the solenoid valves 15a and 15b are closed while the solenoid valve 16 is opened and the pump 70 is driven. Then, as shown in the figure, the electromagnetic valves 17a and 17b are alternately opened for each predetermined time T3, and the remaining water is collected and vented in order with respect to the cleaning pipes 6a and 6b. The anti-freezing of the paths 6a and 6b can be prevented. Here, if a circulation pump is provided as in the example of FIG. 1, the pump 70 is driven, and after the residual water is collected and vented once or several times, the pump 70 is stopped. What is necessary is just to use so that it may switch to ventilation | gas_flowing by a circulation pump.
[0024]
The present invention can be carried out as described above. In the freeze prevention measure, the circulation pump 11 or the high discharge pump 70 is driven to circulate the washing water in the circulation line 13 formed in the apparatus. The cleaning line 6 leading to the cleaning nozzle 5 is connected so as to face the flow path of the path 13, and the cleaning water is circulated to generate a negative pressure on the cleaning line 6 side. While collecting, outside air is attracted | sucked through the washing nozzle 5, the washing nozzle 5 and the washing pipe line 6 are prevented from freezing.
[0025]
In the above-described embodiment, the three-way connector 20 is provided in the return path 12 that branches the downstream side of the high-pressure pump 7 or the high-discharge pump 70 of the cleaning pipe 6, but the three-way connector 20 is connected to the cleaning pipe 6. The negative pressure port 23 may be directly connected to the cleaning pipe 6 by being provided at a connection point with the return path 12. In this case, the washing water pumped by the high pressure pump 7 or the high discharge pump 70 and discharged from the washing nozzle 5 passes through the negative pressure port 23. Therefore, in the configuration of the embodiment of FIG. Therefore, it is necessary to make the structure with a little smaller pipe resistance.
[0026]
【The invention's effect】
As is apparent from the above description, the cleaning pipe is circulated by generating negative pressure on the side of the cleaning pipe by collecting the cleaning water, collecting residual water from the cleaning pipe, and sucking outside air through the cleaning nozzle. Even if a small amount of residual water freezes in the passage, a ventilation passage by intake air is always secured in the washing pipe to prevent the washing water from being discharged. In addition to preventing the pipe from freezing, it is possible to prevent the washing pipe from reaching the washing nozzle along with the circulation of the washing water from becoming unusable due to freezing. The anti-freezing measures carried out in this way do not consume a large amount of water or heating energy due to the spilling of washing water as in the conventional case, and there are also large auxiliary equipment such as a compressor for draining the pipeline with compressed air. A very economical and clean anti-freezing measure can be realized.
[0027]
By using a high-discharge pump or high-pressure pump used for cleaning work and circulating the cleaning water through the circulation line, it is economically possible without additional installation of a special pump to prevent freezing. The present invention can be implemented. In addition, a low-pressure or low-discharge circulation pump provided separately from the high-discharge pump or high-pressure pump can be used. It can be used stably for a period, and running costs such as electricity bills can be reduced.
[0028]
Furthermore, if both the high-pressure pump or high-discharge pump and the low-pressure or low-discharge circulation pump can be used for the circulation of the washing water, the washing water is first circulated at a high speed by the high-pressure pump or the high-discharge pump. Residual water can be collected quickly, and then the washing water can be circulated at a low speed by the circulation pump so that the outside air can be continuously sucked from the washing pipe through the washing nozzle, thereby more effectively preventing freezing. At the same time, the durability of the pump and the running cost can be balanced.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a configuration of an embodiment.
FIG. 2 is a cross-sectional explanatory view of a main part of an embodiment.
FIG. 3 is a block diagram illustrating a control system of the embodiment.
FIG. 4 is a time chart illustrating the operation of the embodiment.
FIG. 5 is a diagram illustrating the configuration of another embodiment.
FIG. 6 is a time chart illustrating the operation of another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cleaning apparatus main body 5 Cleaning nozzle 6 Cleaning pipe line 7 High pressure pump 11 Circulation pump 13 Circulation pipe line 20 Three-way connector 30 Control part 70 High discharge pump D Diffuser part S Restriction part

Claims (4)

タンクに貯えられた洗浄水を圧送して洗浄ノズルから被洗浄体に放出させる洗浄装置において、
凍結防止措置に際し、ポンプを駆動して装置内に形成される循環管路において洗浄水を循環させ、この循環管路の流路に臨ませるように洗浄ノズルへ至る洗浄管路を接続し、洗浄水を循環させることにより洗浄管路側へ負圧を発生させ、前記循環管路に洗浄水を循環させるポンプとして、洗浄の際に洗浄水を圧送するための高吐出ポンプまたは高圧ポンプの他に、低圧または低吐出の循環ポンプを使用可能とし、凍結防止措置に際し、高吐出ポンプまたは高圧ポンプにより洗浄水を循環管路で高速循環させて洗浄管路の残留水を回収した後に、循環ポンプにより洗浄水を循環管路で低速循環させて洗浄管路より洗浄ノズルを介して外気を吸引させるようにすることを特徴とした洗浄装置における凍結防止方法。
In the cleaning device that pumps the cleaning water stored in the tank and releases it from the cleaning nozzle to the object to be cleaned,
In anti-freezing measures, the cleaning water is circulated in the circulation line formed in the device by driving the pump, and the washing line leading to the washing nozzle is connected so as to face the flow path of this circulation line, and washing is performed. As a pump that circulates water to generate a negative pressure on the washing line side and circulates the washing water in the circulation line, in addition to a high discharge pump or a high-pressure pump for pumping the washing water at the time of washing, A low-pressure or low-discharge circulation pump can be used. When freezing prevention measures are taken, high-discharge pump or high-pressure pump circulates wash water at high speed through the circulation line and collects residual water in the wash line, and then cleans it with a circulation pump. A method for preventing freezing in a cleaning apparatus, characterized in that water is circulated at a low speed through a circulation pipe, and outside air is sucked from the washing pipe through a washing nozzle.
請求項1に記載の洗浄装置における凍結防止方法において、前記循環管路には流路の絞り部から下流側へ行くに従い流路が広がるディフューザが形成され、このディフューザの絞り部またはその下流側に前記洗浄管路を臨ませて、洗浄管路より外気を吸引させるようにすることを特徴とした洗浄装置における凍結防止方法。Oite freeze prevention method in the cleaning device according to claim 1, wherein the diffuser flow path spreads in accordance to the circulation line going from the throttle unit of the flow path to the downstream side is formed, choke or downstream of the diffuser An anti-freezing method in a cleaning apparatus , wherein the cleaning pipe is exposed to the side so that outside air is sucked from the cleaning pipe . タンクに貯えられた洗浄水を圧送して洗浄ノズルから被洗浄体に放出させる洗浄装置において、In the cleaning device that pumps the cleaning water stored in the tank and releases it from the cleaning nozzle to the object to be cleaned,
タンクから洗浄ノズルへ洗浄水を送出する洗浄管路と、該洗浄管路に設けられる高吐出ポンプまたは高圧ポンプと、洗浄管路における高吐出ポンプまたは高圧ポンプより上流側に設けられる循環ポンプと、洗浄管路における高吐出ポンプまたは高圧ポンプの下流側から分岐してタンクから送出する洗浄水をタンクに帰還させる循環管路と、洗浄管路における循環管路の分岐よりも下流側から分岐して循環管路に接続する分岐路と、該分岐路と循環管路の接続点に設けられ、循環管路と二方で接続し他の一方は分岐路に臨み負圧を生じる負圧ポートを形成する三方接続具と、洗浄管路・循環管路・分岐路の各管路を開閉する電磁弁と、凍結防止措置として前記循環管路に洗浄水を循環させる制御手段とを備え、  A cleaning line for sending cleaning water from the tank to the cleaning nozzle, a high-discharge pump or a high-pressure pump provided in the cleaning line, and a circulation pump provided on the upstream side of the high-discharge pump or high-pressure pump in the cleaning line; Branching from the downstream side of the high discharge pump or high-pressure pump in the cleaning line and returning the cleaning water sent from the tank back to the tank, and branching from the downstream side of the circulation line in the cleaning line A branch path connected to the circulation pipe and a connection point between the branch path and the circulation pipe are connected to the circulation pipe in two directions, and the other one forms a negative pressure port that faces the branch path and generates a negative pressure. A three-way connector, a solenoid valve that opens and closes each of the cleaning pipe, the circulation pipe, and the branch pipe, and a control unit that circulates the cleaning water through the circulation pipe as a freeze prevention measure,
該制御手段では、凍結防止措置に際し、循環管路と分岐路の電磁弁を開いてから高吐出ポンプまたは高圧ポンプを駆動してタンクの洗浄水を循環管路で高速循環させ、洗浄管路における電磁弁よりも下流側に残留する洗浄水を三方接続具の負圧ポートに接続した分岐路を通じて回収し、この後に前記循環ポンプにより洗浄水を低速循環させ、三方接続具の負圧ポートに接続した分岐路を通じて洗浄管路より洗浄ノズルを介して外気を吸引することを特徴とした洗浄装置。  In the control means, when the anti-freezing measure is taken, the high-pressure pump or the high-pressure pump is driven after opening the solenoid valves of the circulation line and the branch line to circulate the washing water in the tank at a high speed in the circulation line. Wash water remaining downstream from the solenoid valve is collected through a branch path connected to the negative pressure port of the three-way connector, and then the wash water is circulated at a low speed by the circulation pump and connected to the negative pressure port of the three-way connector. A cleaning apparatus that sucks outside air through a cleaning nozzle through a cleaning pipe.
請求項3に記載の洗浄装置において、前記三方接続具は、前記循環管路にあって流路の絞り部から下流側へ行くに従い流路が広がるディフューザを形成し、このディフューザの絞り部またはその下流側に連通して前記負圧ポートを形成して前記洗浄管路と接続することを特徴とした洗浄装置。4. The cleaning apparatus according to claim 3, wherein the three-way connector forms a diffuser in the circulation pipe that expands the flow path as it goes downstream from the narrowed portion of the flow channel. A cleaning apparatus, wherein the negative pressure port is formed in communication with the downstream side and connected to the cleaning pipe.
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