JP2004263653A

JP2004263653A - Self-priming pump

Info

Publication number: JP2004263653A
Application number: JP2003056667A
Authority: JP
Inventors: Takami Koyama; 高見小山; Hiroyuki Oshima; 博之大嶋; Tomiyoshi Sato; 富義佐藤; Yoshiaki Takeda; 吉秋武田; Masaaki Odagiri; 賢明小田桐
Original assignee: Hitachi Home and Life Solutions Inc; Kameya Industries Co Ltd
Current assignee: Hitachi Appliances Inc; Kameya Industries Co Ltd
Priority date: 2003-03-04
Filing date: 2003-03-04
Publication date: 2004-09-24
Anticipated expiration: 2023-03-04
Also published as: JP4369144B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a further compact pump while securing opening/closing stroke of a check valve. <P>SOLUTION: The check valve is disposed in a space in a steam separating chamber on the upper side of a pump runner, and a bag-shaped section for securing the opening/closing stroke is disposed on the check valve side of a partition so as to secure the opening/closing stroke of the check valve. An electric connecting terminal of a motor is set in the vertical direction with respect to the motor axis, and a water hole and a delivery hole are disposed vertically to the motor axis similarly. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、洗濯用として浴槽等からの水を洗濯槽に吸い揚げる自吸式ポンプの構造に関するものである。
【０００２】
【従来の技術】
家庭用全自動洗濯機及び洗濯乾燥機等では、現在主に節水を目的として浴槽の残り湯を洗濯に供するための自吸式ポンプが搭載されており、例えば特開２０００−２９１５８１号公報（特許文献１）や特開２０００−２７９６９４号公報（特許文献２）等が挙げることができる。
【０００３】
前記特開２０００−２９１５８１号公報（特許文献１）に記載された自吸式ポンプでは、吸水ホースを接続させるための吸水口から吸い込んだ水の通路は円筒形状であり、ポンプランナーの前面に逆止弁が設けられており、ポンプケースの逆止弁での封止部の形状は円形状となっていると共にその逆止弁の封止面も円形状になっている。また、モータの電気的接続端子部においてはモータ軸に対し平行に出され、ポンプケース上部に設けられた吐出口および呼び水口もモータ軸に対し平行方向に設けられていることが開示されている。
【０００４】
また、特開２０００−２７９６９４号公報（特許文献２）に記載された自吸式ポンプにおいても、吸水ホースを接続させるための吸水口から吸い込んだ水の通路は円筒形状であり、この水通路と連通する吐出口には逆止弁を装着するための別部品が設けられているが、逆止弁で封止する開口部は円形をしていると共に、逆止弁の封止面も円形状である。また、この逆止弁はモータに直結されたポンプランナーの位置に対しては前面横隣の下側に位置している。また、モータ軸は内部の流体に対し垂直に位置しモータの電気的接続端子はポンプ上部で斜め方向に出されていることが開示されている。
【０００５】
さらに特開昭６０−４５７９０号公報（特許文献３）記載された自吸式ポンプは、吸い込み側になるケーシングカバーの吸い込み口に逆止弁を有し、この逆止弁をポンプランナーの外周上端よりも上部に設けた構成を備えている。
【０００６】
【特許文献１】
特開２０００−２９１５８１号公報
【特許文献２】
特開２０００−２７９６９４号公報
【特許文献３】
特開昭６０−４５７９０号公報
【０００７】
【発明が解決しようとする課題】
全自動洗濯機や洗濯乾燥機等に浴槽等の残り湯を給水するための自吸式ポンプを搭載する場合、その搭載個所は殆どが洗濯機のトップカバー内であるが、近年の洗濯機では様々な付加機能を有する装置がこのトップカバー内に搭載されており、当該ポンプにおいては極僅かな限られたスペースでも搭載できるよう、よりコンパクトな自吸式ポンプが要求されてきている。
【０００８】
また、この様な自吸式ポンプは現在では洗濯容量が６ｋｇ以上の大型の機種にのみ搭載されているが、現在の高齢者の少家族世帯では洗濯容量が４ｋｇや５ｋｇ程度の小さい容量の洗濯機のニーズも高まっており、特に節水に対する意識の高い世代の人達が使用する小容量の洗濯機にもこの様な風呂の残り湯を無駄なく使用できる自吸式ポンプが搭載されていることが望ましいわけであるが、小型の洗濯機の場合は当然ながら製品自体が小さいため現状サイズの自吸式ポンプでは搭載スペースが確保できないのが現状である。
【０００９】
従来技術の自吸式ポンプの構造では、気水分離による自吸完了後の揚水性能をより良くするため逆止弁をポンプランナーの手前に設けている。これはより管路抵抗をより少なくすることが目的であるが、このため逆止弁の開閉ストロークを確保しようとすると最低でもそのストローク分のスペースは必要になり、実際にはポンプケース側のポンプランナーの前面にそのスペースを設けているため、特にポンプとしての長さ方向がそのストローク分長くなってしまうという結果になっていた。また、モータの電気的接続端子もモータ後部（反ポンプ側）にモータ軸と平行に出されているが、通常は接続部の信頼性・安全性及び洗濯機または洗濯乾燥機の結線作業性の面からこの結線部には殆どが樹脂製のハウジング付きコネクターを採用しており、搭載スペースとしてはモータの接続端子に樹脂製のハウジング付きコネクターを加えた分のスペースが必要になっていた。
【００１０】
また、特開２０００−２７９６４９４公報（特許文献２）に記載の自吸式ポンプの場合は、縦軸型ポンプであるため、吸込み水通路が気水分離室内を貫く構造となり、逆止弁はポンプランナーの下側かまたは横側に設けられるためポンプの高さ方向を高くとる必要があった。
【００１１】
本発明は、この様な従来技術による現状を鑑みてなされたもので、その目的は小さなスペースでも搭載可能となる、よりコンパクトな自吸式ポンプを提供することにある。
【００１２】
【課題を解決するための手段】
本発明は、吸水ホース接続用吸水口と自吸用の呼び水を給水するための呼び水口と、吸込んだ水を吐出すための吐出口を有するポンプケースと、モータを収納すると共にモータ軸に直結させるポンプランナーの軸部を封止させる軸封部材の装着部を有するモータケースと、それらのケースの内部に前記ポンプランナーを設けるとともにポンプランナー室・気水分離室と吸込み室とを仕切る仕切り板及び、揚水した水の逆流を防止する逆止弁等を備える自吸式ポンプにおいて、前記逆止弁をポンプランナーの吸い込み口と吸込み室との境界部位を外周方向に延在した延長線近傍で、かつポンプランナー室の外周上方側に配置したことを特徴とする。
【００１３】
このような逆止弁の配置により、長さ方向寸法で従来ポンプに比べ大幅に短くできるため、ポンプの収納スペースが僅かで済み、洗濯機としての付加機能を有する装置と併せて搭載することが可能になる。
【００１４】
また本発明では、ポンプケースの吸水ホース接続部からの通水管形状において一定の通水面積を確保した横長の楕円形状とし、これと連通する逆止弁当接吐出口も横長の楕円形状にするとともに逆止弁の封止部も横長の楕円形状とし、ポンプランナーの羽根の上端面よりも上側に配置しポンプランナー室とを仕切る仕切り板の逆止弁側は逆止弁の開閉ストロークが確保できるようポンプランナー側水通路上端と同一深さまで深くして開閉ストローク確保用袋形状部を設けたことで従来の自吸式ポンプのポンプランナーの手前に一定の開閉ストロークを確保した状態で逆止弁を設ける構造よりもポンプの長さを短くすることが可能となる。
【００１５】
さらに、モータの電気的接続用端子方向においても、モータ軸に対し垂直方向に出すことで従来の設置スペースよりも少ないスペースに収納可能となる。
【００１６】
さらにまた、自吸用の呼び水を給水するための呼び水口または揚水した水をポンプ外に吐出させる吐出口またはその両方をモータ軸に対しケース上部の垂直方向に設けることで、更に設置するのに必要なスペースは少なくなる。特にケースの吐出口方向においては給水を目的とする受水槽の取付けの関係で決定されるが、受水槽までは通常ホースで接続されており吐出口がモータ軸に対し垂直方向に出されていれば、受水槽を側面に本ポンプを設置することも可能となり、設置するのに必要なスペースをより少なくすることも可能になる。
【００１７】
【発明の実施の形態】
以下、本発明の一実施例を図面を基に説明する。
【００１８】
図１は本発明による自吸式ポンプ２２の断面図であり、図２は本発明の自吸式ポンプ２２の分解図である。
【００１９】
モータケース５には、モータ６が収納されるとともに、モータ軸１０に直結されるポンプランナー１１と、ポンプランナーの軸部を封止させる軸封部材９と、軸封部材９の軸封部材装着部１３が設けてある。
【００２０】
軸封部材９はモータケース５の軸封部材装着部１３に圧入で装着し、モータ６をモータケース５に所定の位置まで挿入後先端に空転防止と圧入時の空気抜き用としてローレット加工又はステーキング加工が施されたモータ軸１０にポンプランナー１１を所定の深さまで圧入し、ポンプランナー１１の軸は軸封部材９で封止される構造となっている。また、モータキャップ３０をモータケース５に装着することでモータケース５に装着され、モータ軸１０の先端にポンプランナー１１が圧入されたモータ６の軸方向のがたつきを押さえている。このモータキャップ３０をモータケース５に装着する際はポンプ運転時の振動を吸収するため、またモータ内への水の浸入を防止するために弾性部材４１を介してモータケース５に装着することも可能である。
【００２１】
ポンプケース１には浴槽等の水源からの揚水用吸水ホース１４を接続するための吸水ホース接続用吸水口２と吸い込んだ水がポンプ停止時、水源に逆流しないように設けた逆止弁１２と、前記吸込口と逆止弁までを連通する横長の楕円形状の吸込み水通路部１７、及び図３の本発明による自吸式ポンプの平面図に示すように自吸用の呼び水を給水するための呼び水口１５、吸い込んだ水を吐出するための吐出口１６が備わる。これに加え、前記逆止弁１２を押さえて固定するための逆止弁固定用リブ３１及び逆止弁１２の開閉ストロークを確保するために形成された開閉ストローク確保用袋形状部８を有し、ポンプ室１８及びモータケース５とポンプケース１を螺着または溶着等で形成される気水分離室１９と、吸込み室２０を分離する仕切り板３が装着される仕切り板装着部３２には、前記ポンプ室１８及び気水分離室１９と吸込み室を２０より確実に封止し分離するための弾性を有する封止部材２８の装着用凹溝部３３を有し、この凹溝部に弾性を有する封止部材２８が装着されている。
【００２２】
この仕切り板３がポンプケース１に組み込まれた状態にあっては、仕切り板３の中心より下側に設けたベルマウス形状の開口部２４の中心がポンプランナー１１の中心に位置するようになっている。また、この仕切り板３の開口部２４の吸込口面積Ｄ２はポンプランナー１１の吸込み口３９の面積とほぼ同一面積であり、この各々の面積がポンプ揚水時の流量特性を左右している。
【００２３】
また、図６に示す、このモータケース５とポンプケース１はポンプケースに装着された仕切り板３のランナー側水通路先端部４２が図７に示すようにモータケース５の仕切り板当接面に設けた仕切り板嵌合用凹溝部３４に挿入され、各ケース間を封止する弾性を有する封止部材２７を介して複数本の螺子２９で螺着されるため、ポンプケース１に装着された封止部材２８は仕切り板３を介してモータケース５とポンプケース１で挟みこまれ押し付けられることで封止効果が得られるように構成されている。
【００２４】
この仕切り板３のランナー側水通路先端部４２と逆止弁１２の開閉ストロークを確保した開閉ストローク確保用袋形状部８の高さは図１０の仕切り板単品図に示すように同一高さである。螺子２９でお互いのケースを締付けた際はモータケース５に設けている仕切り板嵌合用凹溝部３４の溝全面と面合わせになった位置で仕切り板３は装着されるため、仕切り板３のランナー側水通路先端部４２及び逆止弁１２の開閉ストローク確保用袋形状部８の端面と、モータケース５の仕切り板嵌合用凹溝部３４は図７のポンプ内部の部分詳細図に示す通り隙間無く固着される。
【００２５】
なお、仕切り板３とポンプケースの仕切り板装着部３２及び仕切り板のポンプランナー側水通路先端部４２とモータケースの仕切り板嵌合用凹溝部３４に隙間があった場合は、ポンプ室１８より気水分離室１９に吐出された空気や水が各々の隙間から再び吸込み室２０やポンプ室１８に戻るという動作を繰り返すため揚水用吸水ホース１４内の空気を排気するのに時間が掛かるか又は排気が出来なくなり、自吸性能に悪影響を及ぼすことになる。
【００２６】
図５、図６は自吸式ポンプ２２の動作（自吸及び揚水）説明図である。自吸式ポンプ２２の内部には呼び水口１５より呼び水４が導かれる。自吸式ポンプ２２のポンプケース１の吸水ホース接続用吸水口２には、浴槽等の水源から揚水するための揚水用吸水ホース１４が接続されている。ポンプ運転開始時、揚水用吸水ホース１４が連通する水源からポンプまでの空気を排気させるため、呼び水４で充満されたポンプの内部ではモータ６に直結されたポンプランナー１１が高速で回転するため吸込み室２０からポンプランナー１１の中心部は負圧となる。
【００２７】
この負圧に引かれて揚水用吸水ホース１４内の空気はポンプランナー１１側に吸い込まれ、ポンプ内の呼び水１５と一緒にポンプ室１８より仕切り板３のポンプランナー側水通路部２５を高速で通過し、モータケース５とポンプケース１より形成された気水分離室１９へと導かれる。仕切り板のポンプランナー側水通路部２５という狭い空間を高速で通過したその水は広い空間の気水分離室１９に導かれた際、その容積（水通路面積）に比例して流速が低下し、更に気水分離室１９を形成するポンプケース１に複数個設けられた気水分離板３５にぶつかることで更に流速が低下させられる。呼び水４の中に取り込まれて混入した前記吸水ホース内の空気は水から分離され、呼び水口１５及び吐出口１６より空気だけが排気される。
【００２８】
なお、この水から空気を分離する気水分離の作用は、吸水ホース内の空気が完全に排気されるまで行われ、空気の排気完了後に呼び水口１５及び吐出口１６からポンプで揚水した水が吐出され、所定の揚水量が確保できる揚水ポンプとして機能するわけである。
【００２９】
ポンプケース１の吸水ホース接続用吸水口２に連通する吸込み水通路部１７は横長の楕円形状であり、図８に示すようにその水通路から吸込み室２０に吐出される逆止弁１２で封止させる逆止弁封止部吐出口２１も横長の楕円形状とし、この横長の楕円形状の逆止弁封止部吐出口２１には逆止弁１２が配置されており、この逆止弁１２は自吸時及び給水時は図１１に示すようにθ１度の開閉角度で開き、ポンプ停止時は閉じる構造となっている。
【００３０】
この逆止弁１２は気水分離室１９に張り出した仕切り板３に囲まれた形でポンプランナー１１の羽根部上端よりもＬ４寸法（１ｍｍ以上）高い位置に設けられ、その形状は図９に示す通り横長の楕円形状であり、封止面３６の上部には図８に示すポンプケース１の逆止弁装着凹溝部３７に装着できるようポンプケース装着用凸部３８を形成している。このポンプケース装着用凸部３８をポンプケース１の逆止弁装着凹溝部３７に装着し、開閉動作を繰り返しても位置がずれないよう仕切り板３の逆止弁固定用リブ３１で押し付けて固定している。この逆止弁１２とポンプケース１の逆止弁で封止させる吐出口２１及びこの封止部に連通する吸水ホース接続口２からの吸込み水通路部１７も横長楕円形状であるため図１３で示す従来の自吸式ポンプ２３（全長Ｌ）よりＬ３寸法（５ｍｍ以上）分短くすることが可能となる。
【００３１】
上述した自吸式ポンプの全長を短かくすることができた理由について、さらに説明を加える。
【００３２】
この自吸式ポンプは、揚水用吸水ホース１４を接続させるための吸水ホース接続用吸水口２と自吸用の呼び水を給水するための呼び水口１５と、吸込んだ水を吐出すための吐出口１６を有するポンプケース１と、モータ６を収納すると共にモータ軸１０に直結させるポンプランナー１１の軸部を封止させる軸封部材９の装着部１３を有するモータケース５と、その内部に前記ポンプランナー１１を有すると共にポンプランナー室・気水分離室１９と吸込み室２０とを仕切る仕切り板３及び、揚水した水の逆流を防止する逆止弁１２等を備えた構成を有している。
【００３３】
そして、その逆止弁１２をポンプランナー１１の吸い込み口３９と吸込み室２０との境界部位を外周方向に延在した延長線近傍で、かつポンプランナー室の外周上方側に配置することで、これまで吸込み室２０がポンプランナー１１の吸い込み口３９の前方に大きく突き出ていた構造を一挙に縮小でき、自吸式ポンプの全長が短縮化されたのである。
【００３４】
なお、逆止弁１２を前記境界部分の延長線近傍よりもモータ６側に寄せてポンプランナー１の上側にラップするように配置することで、自吸式ポンプの全長をを更に短縮化することができる。但し、このような配置の構成にすると、逆止弁封止部吐出口２１から突出して吸込み室２０に流れ込む水の流が大きく曲がる不具合がある。
【００３５】
また吸水ホース接続用吸水口２がポンプケースの上側に縦向きに形成されている。この吸水ホース接続用吸水口２の下流側に連通し、かつ縦に下る吸い込み水通路部１７は、通路断面が楕円形状に形成され、しかも楕円の長径が水平に置かれるモータ軸１０の軸線方向に対して交差するように設けられているので、前述したようにＬ３の寸法を短くできたのである。
【００３６】
吸い込み水通路部１７がＬ３の寸法分短縮できるので、自吸式ポンプの収納が楽になる。この自吸式ポンプは、洗濯機のトップカバーに収納される。トップカバーの収納部は狭いので長さを縮小することは、殊のほか有効である。
【００３７】
逆止弁封止部吐出口２１は、吸い込み水通路部１７の下流側に連通するように設けられ、かつ吸い込み水通路部１７に対してほぼ直角に曲がるよう配置される。言い換えると、逆止弁封止部吐出口２１は横向に配置されているのである。
【００３８】
逆止弁封止部吐出口２１は通路断面が吸い込み水通路部１７と同様に楕円形状に形成されている。
【００３９】
逆止弁封止部吐出口２１は、楕円の長径方向が横向き（水平方向）になるように配置される。逆止弁封止部吐出口２１の先端側に回動自在に備わる逆止弁１２は、逆止弁封止部吐出口２１の先端面に接離する。逆止弁１２が接することで逆止弁封止部吐出口２１は閉じられ、離れることで逆止弁封止部吐出口２１は開かれる。
【００４０】
逆止弁１２は、上部に設けられているポンプケース装着用凸部３８を逆止弁封止部吐出口２１の先端上部に取り付けて開閉自在に支持されている。逆止弁１２が開かれて行くにしたがい、逆止弁１２の下端が持ち上がるように回動して行く。逆止弁１２の開閉に伴う回動は、前記モータケース側の気水分離室に向けて突き出すように形成された開閉ストローク確保用袋形状部８の内部で行なわれる。
逆止弁１２は、前述したように楕円の長径方向が横向きになるような形状にしているので、楕円の長径方向を縦向きにしているものに比べ、回動する際の半径が小さく、それだけ開閉ストローク確保用袋形状部８の大きさを小さくすることができ、その分だけ気水分離室１９の体積が増えるので気水分離効果が向上する。
【００４１】
尚、この吸い込み水通路部１７の吸込口通水面積Ｄ１は吸込み側水通路の最小面積となる仕切り板の開口部２４の吸込口面積Ｄ２よりも大きくしているため吐出流量には著しい流量低下等の影響は与えない。また仕切り板３の側をポンプランナー側水通路部２５の上端と同一深さの開閉ストローク確保用袋形状部８にすることで逆止弁の開閉ストロークを確保し、その開閉ストロークの開閉角度θ１は図１２に示す従来の自吸式ポンプ２３の逆止弁２６の開閉ストロークの開閉角度θ２と同等以上を確保しているため吐出流量に著しい影響を及ぼすことはない。
【００４２】
図３で示す自吸用の呼び水を給水するための呼び水口１５と外部に給水するための吐出口１６は、図１に示すようにポンプ内の呼び水４の水面と平行なモータ軸１０に対し平行であるが、図４に示すようにモータ軸１０に対し１５ａ，１６ａまたは１５ｂ，１６ｂのようにポンプケース１の上部に直角方向に設けても良い。
【００４３】
これは、ポンプから送水された水を受ける受水槽等とポンプの配置で自由に決定できる。また、モータの電気的接続端子７の方向もモータ軸１０に対し７ａのように平行に出してもよいが、７ｂ，７ｃのように垂直方向に出すことも可能である。
【００４４】
尚、このモータの電気的接続端子７を７ａのようにモータ軸１０に対し平行に出した場合、通常この接続部の信頼性・安全性及び洗濯機または洗濯乾燥機の結線作業性の面から樹脂製のハウジング付きコネクター４０で結線されるため、少なくともＬ５寸法分のスペースがモータの電気的接続端子７側には必要になってしまう。このため、図４に示すモータ軸１０に対し、７ｂまたは７ｃの方向に出すことが好ましい訳であるが、いずれにしても搭載するトップカバー内でのスペースや他の電気部品等のレイアウト上より有利な設置方法より決定すれば良いわけである。
【００４５】
上述した本発明の自吸式ポンプ２２によると、図１２及び図１３に示すようにモータの電気的接続端子７をモータ軸１０に垂直に出すことで、Ｌ１−Ｌ２の寸法分（５ｍｍ以上）ポンプの長さを短くすることが可能となる。また、逆止弁１２をポンプランナー１１の羽根上端よりもＬ４（１ｍｍ以上）上側に設けることでＬ３寸法（５ｍｍ以上）分短くすることができ、モータの電気的接続端子７がモータ軸１０に対し、平行に出されている場合であってもＬ３寸法（５ｍｍ以上）分ポンプの全長が短くなるため、よりコンパクトな自吸式ポンプを提供することが可能となる。
【００４６】
【発明の効果】
本発明によれば、長さ方向寸法で従来ポンプに比べ大幅に短くできるため、洗濯機等の狭いスぺースに据え付けるのに好適である。
【図面の簡単な説明】
【図１】本発明の実施例に係るもので、自吸式ポンプの構造を示す断面図。
【図２】本発明の実施例に係るもので、自吸式ポンプの構造を示す展開断面図（分解図）。
【図３】本発明の実施例に係るもので、自吸式ポンプの平面図。
【図４】本発明の実施例に係るもので、自吸式ポンプで、電気的接続端子及び呼び水口・吐出口がモータ軸に対し平行ないし垂直に設けられていることを示す平面図。
【図５】本発明の実施例に係るもので、ポンプの自吸時におけるポンプ内の流体の流れを示す図。
【図６】本発明の実施例に係るもので、ポンプの自吸時におけるポンプ内の流体の流れを示す図。
【図７】本発明の実施例に係るもので、ポンプ内部の部分拡大断面図。
【図８】本発明の実施例に係るもので、ポンプケースの詳細図。
【図９】本発明の実施例に係るもので、逆止弁の詳細図。
【図１０】本発明の実施例に係るもので、仕切り板の詳細図。
【図１１】本発明の実施例に係るもので、自吸式ポンプで逆止弁の開閉ストロークを及び逆止弁のポンプランナーに対する位置示す断面図。
【図１２】従来例に係る自吸式ポンプの平面図及び断面図。
【図１３】従来例の自吸式ポンプと本発明の自吸式ポンプを比べた概略寸法比較図。
【符号の説明】
１…ポンプケース、２…吸水ホース接続用吸水口、３…仕切り板、４…呼び水、５…モータケース、６…モータ、７…モータの電気的接続端子、７ａ…モータ端子の方向（モータ軸に平行）、７ｂ・７ｃ…モータ端子の方向（モータ軸に垂直）、８…仕切り板の逆止弁開閉ストローク確保用袋形状部、９…軸封部材、１０…モータ軸、１１…ポンプランナー、１２…逆止弁、１３…モータケースの軸封部材装着部、１４…揚水用吸水ホース、１５…呼び水口（モータ軸に平行）、１５ａ・１５ｂ…呼び水口（モータ軸に垂直）、１６…吐出口（モータ軸に平行）、１６ａ・１６ｂ…吐出口（モータ軸に垂直）、１７…ポンプケースの吸込み水通路部、１８…ポンプ室、１９…気水分離室、２０…吸込み室、２１…ポンプケースの逆止弁封止部吐出口、２２…本発明の自吸式ポンプ、２３…従来の自吸式ポンプ、２４…仕切り板の開口部、２５…仕切り板のポンプランナー側水通路部、２６…従来の自吸式ポンプの逆止弁、２７…ポンプケースとモータケース固着時の封止部材、２８…ポンプ室・気水分離室・吸込み室を分離する弾性を有する封止部材、２９…ねじ、３０…モータキャップ、３１…仕切り板の逆止弁固定用リブ、３２…ポンプケースの仕切り板装着部、３３…ポンプケースと仕切り板間の封止部材装着用凹部、３４…モータケースの仕切り板嵌合用凹溝部、３５…気水分離板、３６…逆止弁の封止面、３７…ポンプケースの逆止弁装着凹溝部、３８…逆止弁のポンプケース装着用凸部、３９…ポンプランナーの吸込み口、４０…モータの電気的接続端子結線用ハウジング付きコネクター、４１…モータを押さえる弾性部材、４２…仕切り板のランナー側水通路先端部、Ｌ…従来のポンプの長さ、Ｌ１…従来のポンプと本発明のポンプ最大長さの差、Ｌ２…従来のポンプと本発明のポンプのモータ端子を含まない場合の長さの差、Ｌ３…従来のポンプと本発明ポンプの前側の寸法差、Ｌ４…ポンプランナーの羽根上端部から逆止弁までの寸法、Ｌ５ハウジング付きコネクター結線時の必要寸法、θ１…本発明のポンプ逆止弁の開閉角度、θ２…従来のポンプの逆止弁の開閉角度、Ｄ１…本発明ポンプの吸水口通水面積、Ｄ２…仕切り板の吸込口面積。[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a structure of a self-priming pump for drawing water from a bathtub or the like into a washing tub for washing.
[0002]
[Prior art]
Currently, home-use fully automatic washing machines and washing / drying machines are equipped with a self-priming pump for washing remaining hot water in a bathtub mainly for the purpose of saving water. For example, Japanese Patent Application Laid-Open No. 2000-291581 (Patent) Reference 1) and JP-A-2000-279694 (Patent Document 2).
[0003]
In the self-priming pump described in Japanese Patent Application Laid-Open No. 2000-291581 (Patent Document 1), the passage of water sucked from a water suction port for connecting a water suction hose has a cylindrical shape, and a water passage is provided in front of the pump runner. A stop valve is provided, and a shape of a sealing portion of the check valve of the pump case is circular, and a sealing surface of the check valve is also circular. Further, it is disclosed that the electric connection terminal portion of the motor is provided in parallel with the motor shaft, and a discharge port and a priming port provided in an upper part of the pump case are also provided in a direction parallel to the motor shaft. .
[0004]
Also, in the self-priming pump described in Japanese Patent Application Laid-Open No. 2000-279694 (Patent Document 2), the passage of water sucked from a water suction port for connecting a water suction hose has a cylindrical shape. A separate part for mounting a check valve is provided at the communicating discharge port, but the opening sealed by the check valve is circular and the sealing surface of the check valve is also circular. It is. The check valve is located on the lower side next to the front surface with respect to the position of the pump runner directly connected to the motor. It is also disclosed that the motor shaft is positioned perpendicular to the internal fluid, and the electric connection terminals of the motor are projected obliquely above the pump.
[0005]
Further, the self-priming pump described in Japanese Patent Application Laid-Open No. 60-45790 (Patent Document 3) has a check valve at a suction port of a casing cover on a suction side, and the check valve is connected to an upper end of an outer periphery of a pump runner. It is provided with a configuration provided above.
[0006]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-291581 [Patent Document 2]
JP 2000-279694 A [Patent Document 3]
JP-A-60-45790
[Problems to be solved by the invention]
When mounting a self-priming pump for supplying remaining hot water such as a bathtub to a fully automatic washing machine or a washing / drying machine, the mounting location is mostly within the top cover of the washing machine, but in recent washing machines, A device having various additional functions is mounted in the top cover, and a more compact self-priming pump has been demanded for the pump so that it can be mounted in a very limited space.
[0008]
In addition, such self-priming pumps are currently installed only on large models with a washing capacity of 6 kg or more. However, small households with a small washing capacity of about 4 kg or 5 kg are currently used by small families of the elderly. The need for such machines is also increasing, especially for small-capacity washing machines used by generations with a high awareness of saving water.Such self-priming pumps that can use the remaining hot water from the bath without waste are installed. Although it is desirable, in the case of a small-sized washing machine, the product itself is naturally small, so that a mounting space cannot be secured with a current-size self-priming pump.
[0009]
In the structure of the conventional self-priming pump, a check valve is provided in front of the pump runner in order to improve the pumping performance after the completion of self-priming by air / water separation. The purpose of this is to further reduce the pipeline resistance.However, in order to secure the opening / closing stroke of the check valve, at least a space for the stroke is required. Since the space is provided on the front surface of the planner, the length direction of the pump particularly becomes longer by the stroke. The electrical connection terminal of the motor is also provided at the rear of the motor (opposite to the pump side) in parallel with the motor shaft, but usually the reliability and safety of the connection and the workability of the connection of the washing machine or the washer / dryer. From the point of view, a connector with a housing made of resin is mostly used for this connection portion, and a space for mounting the connector with a resin housing with the connection terminal of the motor is required as a mounting space.
[0010]
In the case of the self-priming pump described in Japanese Patent Application Laid-Open No. 2000-2796494 (Patent Document 2), since the pump is a vertical axis type pump, the suction water passage has a structure penetrating the air / water separation chamber, and the check valve is a pump. Since the pump is provided below or beside the planner, it is necessary to increase the height of the pump.
[0011]
SUMMARY OF THE INVENTION The present invention has been made in view of such a situation in the related art, and has as its object to provide a more compact self-priming pump that can be mounted in a small space.
[0012]
[Means for Solving the Problems]
The present invention provides a pump case having a water inlet for connecting a water suction hose, a priming port for supplying priming water for self-priming, a pump case having a discharge port for discharging sucked water, a motor housed and directly connected to the motor shaft. Motor case having a mounting portion of a shaft sealing member for sealing a shaft portion of a pump runner to be sealed, and a partition plate for providing the pump runner inside the case and partitioning a pump runner chamber, a gas-water separation chamber, and a suction chamber And, in a self-priming pump including a check valve for preventing backflow of pumped water, the check valve is provided near an extension line extending in the outer peripheral direction at a boundary portion between a suction port of the pump runner and a suction chamber. And the pump runner chamber is disposed above the outer periphery of the pump runner chamber.
[0013]
With such a check valve arrangement, the length of the pump can be reduced significantly in comparison with the conventional pump in the longitudinal direction, so that the storage space of the pump is small and the pump can be mounted together with a device having an additional function as a washing machine. Will be possible.
[0014]
Further, in the present invention, in the water pipe shape from the water suction hose connection portion of the pump case, a horizontally long elliptical shape which secures a constant water flow area, and the check valve contact discharge port communicating therewith has a horizontally long elliptical shape. The sealing portion of the check valve also has a horizontally long elliptical shape, and is disposed above the upper end surface of the blade of the pump runner, and the check valve side of the check plate side of the partition plate separating the pump runner chamber can secure the opening / closing stroke of the check valve. A check valve with a fixed opening / closing stroke in front of the pump runner of a conventional self-priming pump by providing a bag-shaped part for securing the opening / closing stroke that is deepened to the same depth as the upper end of the water passage on the pump runner side. It is possible to make the length of the pump shorter than the structure in which the is provided.
[0015]
Further, even in the direction of the electric connection terminal of the motor, it can be housed in a space smaller than a conventional installation space by extending the motor perpendicularly to the motor shaft.
[0016]
Furthermore, by providing a priming port for supplying priming water for self-priming and / or a discharge port for discharging the pumped water to the outside of the pump in the vertical direction of the upper part of the case with respect to the motor shaft, further installation is possible. Less space is required. In particular, the direction of the discharge port of the case is determined by the installation of the water receiving tank for the purpose of water supply, but it is usually connected to the water tank by a hose and the discharge port is drawn out in the direction perpendicular to the motor shaft. For example, it is possible to install the pump on the side of the receiving tank, and it is possible to reduce the space required for installation.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0018]
FIG. 1 is a sectional view of a self-priming pump 22 according to the present invention, and FIG. 2 is an exploded view of the self-priming pump 22 of the present invention.
[0019]
The motor case 5 accommodates the motor 6 and has a pump runner 11 directly connected to the motor shaft 10, a shaft sealing member 9 for sealing a shaft portion of the pump runner, and a shaft sealing member mounting of the shaft sealing member 9. A part 13 is provided.
[0020]
The shaft sealing member 9 is press-fitted into the shaft sealing member mounting portion 13 of the motor case 5, and the motor 6 is inserted into the motor case 5 to a predetermined position, and then knurling or staking is performed at the tip to prevent idling and release air during press-fitting. The pump runner 11 is press-fitted into the machined motor shaft 10 to a predetermined depth, and the shaft of the pump runner 11 is sealed with the shaft sealing member 9. Further, the motor cap 30 is mounted on the motor case 5 by mounting the motor cap 30 on the motor case 5, and the axial run-out of the motor 6 in which the pump runner 11 is press-fitted into the tip of the motor shaft 10 is suppressed. When attaching the motor cap 30 to the motor case 5, the motor cap 30 may be attached to the motor case 5 via an elastic member 41 in order to absorb vibration during the operation of the pump and to prevent water from entering the motor. It is possible.
[0021]
The pump case 1 has a water suction hose connection port 2 for connecting a water suction hose 14 for pumping water from a water source such as a bathtub, and a check valve 12 provided to prevent the sucked water from flowing back to the water source when the pump is stopped. 3, a horizontally long elliptical suction water passage 17 communicating with the suction port and the check valve, and for supplying priming water for self-priming as shown in the plan view of the self-priming pump according to the present invention in FIG. And a discharge port 16 for discharging the sucked water. In addition, it has a check valve fixing rib 31 for holding down and fixing the check valve 12, and an opening / closing stroke securing bag-shaped portion 8 formed to secure the opening / closing stroke of the check valve 12. , A water / water separation chamber 19 formed by screwing or welding the pump case 18 and the motor case 5 and the pump case 1, and a partition plate mounting portion 32 to which the partition plate 3 for separating the suction chamber 20 is mounted. The pump chamber 18, the water / water separation chamber 19 and the suction chamber are more securely sealed and separated from each other by a resilient sealing member 28 for mounting the resilient sealing member 28. A stop member 28 is mounted.
[0022]
When the partition plate 3 is incorporated in the pump case 1, the center of the bell mouth-shaped opening 24 provided below the center of the partition plate 3 is located at the center of the pump runner 11. ing. Further, the suction port area D2 of the opening 24 of the partition plate 3 is substantially the same as the area of the suction port 39 of the pump runner 11, and each of these areas affects the flow rate characteristics during pump pumping.
[0023]
As shown in FIG. 6, the motor case 5 and the pump case 1 are arranged such that the runner-side water passage tip 42 of the partition plate 3 attached to the pump case is in contact with the partition plate contact surface of the motor case 5 as shown in FIG. It is inserted into the provided groove 34 for fitting the partition plate, and is screwed with a plurality of screws 29 via an elastic sealing member 27 for sealing between the cases. The stop member 28 is configured to be sandwiched and pressed between the motor case 5 and the pump case 1 via the partition plate 3 so as to obtain a sealing effect.
[0024]
The height of the opening / closing stroke securing bag-shaped portion 8 that secures the opening / closing stroke of the runner-side water passage distal end portion 42 of the partition plate 3 and the check valve 12 is the same as shown in FIG. is there. When the two cases are tightened with the screws 29, the partition plate 3 is mounted at a position flush with the entire groove of the partition plate fitting concave groove portion 34 provided in the motor case 5, so that the runner of the partition plate 3 The end face of the side water passage front end portion 42, the end face of the bag-shaped portion 8 for securing the opening / closing stroke of the check valve 12, and the groove 34 for fitting the partition plate of the motor case 5 have no gap as shown in the partial detailed view inside the pump of FIG. It is fixed.
[0025]
If there is a gap between the partition plate 3, the partition plate mounting portion 32 of the pump case, the front end portion 42 of the water passage on the pump runner side of the partition plate, and the groove 34 for fitting the partition plate of the motor case, the pump chamber 18 removes the air. Since the operation of returning the air and water discharged to the water separation chamber 19 to the suction chamber 20 and the pump chamber 18 from the respective gaps again is repeated, it takes time to exhaust the air in the water suction hose 14 for pumping or exhaustion. And the self-priming performance is adversely affected.
[0026]
5 and 6 are explanatory diagrams of the operation (self-priming and pumping) of the self-priming pump 22. The priming water 4 is guided from the priming port 15 into the self-priming pump 22. A water suction hose 14 for pumping water from a water source such as a bathtub is connected to the water suction port 2 for connecting the water suction hose of the pump case 1 of the self-priming pump 22. At the start of the pump operation, the pump runner 11 directly connected to the motor 6 rotates at high speed inside the pump filled with the priming water 4 in order to exhaust air from the water source connected to the pumping water suction hose 14 to the pump. From the chamber 20, the center of the pump runner 11 is at a negative pressure.
[0027]
The air in the water suction hose 14 for pumping is sucked into the pump runner 11 side by the negative pressure, and flows along with the priming water 15 in the pump through the pump runner side water passage 25 of the partition plate 3 from the pump chamber 18 at high speed. After passing through, it is led to a steam-water separation chamber 19 formed by the motor case 5 and the pump case 1. When the water that has passed at a high speed through the narrow space of the partition plate at the pump runner side water passage 25 is led to the steam-water separation chamber 19 in the wide space, the flow velocity decreases in proportion to the volume (water passage area). Further, the flow velocity is further reduced by colliding with a plurality of steam-water separation plates 35 provided in the pump case 1 forming the steam-water separation chamber 19. The air in the water-absorbing hose that has been taken in and mixed into the priming water 4 is separated from the water, and only the air is exhausted from the priming port 15 and the discharge port 16.
[0028]
The operation of air-water separation for separating air from water is performed until the air in the water suction hose is completely exhausted, and after pumping of the air is completed, the water pumped from the priming port 15 and the discharge port 16 is used. It is discharged and functions as a pump that can secure a predetermined pumping amount.
[0029]
The suction water passage portion 17 communicating with the water suction hose connection water suction port 2 of the pump case 1 has a horizontally long elliptical shape, and is sealed by the check valve 12 discharged from the water passage to the suction chamber 20 as shown in FIG. The check valve sealing portion discharge port 21 to be stopped is also formed in a horizontally long elliptical shape, and the check valve 12 is disposed in the horizontally long elliptical check valve sealing portion discharge port 21. Has a structure that opens at an opening and closing angle of θ1 degrees during self-priming and water supply, and closes when the pump stops, as shown in FIG.
[0030]
The check valve 12 is provided at a position L4 dimension (1 mm or more) higher than the upper end of the blade of the pump runner 11 in a form surrounded by the partition plate 3 projecting into the water / water separation chamber 19, and its shape is shown in FIG. As shown, it has a horizontally long elliptical shape, and a pump case mounting convex portion 38 is formed on the upper portion of the sealing surface 36 so as to be mounted in the check valve mounting concave groove portion 37 of the pump case 1 shown in FIG. The pump case mounting projection 38 is mounted in the check valve mounting groove 37 of the pump case 1, and is pressed and fixed by the check valve fixing rib 31 of the partition plate 3 so as not to be displaced even if the opening and closing operations are repeated. are doing. The discharge port 21 sealed by the check valve 12 and the check valve of the pump case 1 and the suction water passage 17 from the water suction hose connection port 2 communicating with the sealing portion are also horizontally oblong, so that they are shown in FIG. It is possible to reduce the length of the conventional self-priming pump 23 (total length L) by an L3 dimension (5 mm or more).
[0031]
The reason why the overall length of the self-priming pump described above can be shortened will be further described.
[0032]
This self-priming pump includes a water suction hose connecting water inlet 2 for connecting a water suction hose 14 for pumping, a priming port 15 for supplying priming water for self-priming, and a discharge port for discharging the sucked water. And a motor case 5 having a mounting portion 13 of a shaft sealing member 9 for accommodating the motor 6 and sealing a shaft portion of a pump runner 11 directly connected to the motor shaft 10. It has a configuration having a planner 11 and a partition plate 3 for separating a pump runner chamber / air / water separation chamber 19 and a suction chamber 20 and a check valve 12 for preventing backflow of pumped water.
[0033]
By arranging the check valve 12 at the boundary between the suction port 39 of the pump runner 11 and the suction chamber 20 in the vicinity of an extended line extending in the outer peripheral direction and on the outer peripheral upper side of the pump runner chamber, The structure in which the suction chamber 20 protrudes far in front of the suction port 39 of the pump runner 11 can be reduced at once, and the overall length of the self-priming pump is reduced.
[0034]
The total length of the self-priming pump can be further reduced by disposing the check valve 12 so as to be closer to the motor 6 side than the vicinity of the extension of the boundary portion and wrapped above the pump runner 1. Can be. However, with such a configuration, there is a problem that the flow of water that projects from the check valve sealing portion discharge port 21 and flows into the suction chamber 20 is largely bent.
[0035]
A water suction port 2 for connecting a water suction hose is formed vertically above the pump case. The suction water passage portion 17 that communicates with the downstream side of the water suction hose connection water intake port 2 and that extends vertically has an elliptical passage cross section, and the major axis of the ellipse is placed horizontally. , The dimension of L3 can be shortened as described above.
[0036]
Since the suction water passage 17 can be shortened by the dimension of L3, storage of the self-priming pump becomes easy. This self-priming pump is housed in the top cover of the washing machine. Reducing the length is particularly effective because the housing of the top cover is narrow.
[0037]
The check valve sealing portion discharge port 21 is provided so as to communicate with the downstream side of the suction water passage 17, and is disposed so as to be bent substantially at right angles to the suction water passage 17. In other words, the check valve sealing portion discharge port 21 is arranged laterally.
[0038]
The check valve sealing portion discharge port 21 has a passage cross section formed in an elliptical shape similarly to the suction water passage portion 17.
[0039]
The check valve sealing portion discharge port 21 is arranged so that the major axis direction of the ellipse is horizontal (horizontal direction). The check valve 12 rotatably provided at the distal end side of the check valve sealing portion discharge port 21 comes into contact with and separates from the distal end surface of the check valve sealing portion discharge port 21. The check valve sealing portion discharge port 21 is closed when the check valve 12 is in contact, and the check valve sealing portion discharge port 21 is opened when the check valve 12 is separated.
[0040]
The check valve 12 has a pump case mounting protrusion 38 provided at the upper portion thereof attached to the upper end of the check valve sealing portion discharge port 21 and is supported so as to be freely opened and closed. As the check valve 12 is opened, the lower end of the check valve 12 rotates so as to be lifted. The rotation accompanying the opening and closing of the check valve 12 is performed inside the open / close stroke securing bag-shaped portion 8 formed so as to protrude toward the air / water separation chamber on the motor case side.
As described above, the check valve 12 has a shape in which the major axis direction of the ellipse is horizontal, so that the check valve 12 has a smaller radius at the time of rotation than that in which the major axis direction of the ellipse is vertical. The size of the bag-shaped portion 8 for securing the opening / closing stroke can be reduced, and the volume of the water / water separation chamber 19 increases by that much, so that the water / water separation effect is improved.
[0041]
Since the suction port passage area D1 of the suction water passage 17 is larger than the suction port area D2 of the opening 24 of the partition plate, which is the minimum area of the suction side water passage, the discharge flow rate is significantly reduced. And so on. Further, the opening and closing stroke of the check valve is ensured by making the opening / closing stroke securing bag-shaped portion 8 of the same depth as the upper end of the pump runner side water passage portion 25 on the side of the partition plate 3 and the opening / closing angle θ1 of the opening / closing stroke. Does not significantly affect the discharge flow rate since the opening / closing angle θ2 of the opening / closing stroke of the check valve 26 of the conventional self-priming pump 23 shown in FIG.
[0042]
A priming port 15 for supplying priming water for self-priming and a discharge port 16 for supplying water to the outside shown in FIG. 3 are connected to a motor shaft 10 parallel to the water surface of priming 4 in the pump as shown in FIG. Although it is parallel, as shown in FIG. 4, it may be provided at right angles to the upper part of the pump case 1 such as 15a, 16a or 15b, 16b with respect to the motor shaft 10.
[0043]
This can be freely determined by the arrangement of the pump and the water receiving tank for receiving the water sent from the pump. In addition, the direction of the electric connection terminal 7 of the motor may be parallel to the motor shaft 10 as shown by 7a, but may also be vertical to 7b and 7c.
[0044]
When the electric connection terminal 7 of this motor is extended in parallel to the motor shaft 10 as shown at 7a, usually from the viewpoint of the reliability and safety of this connection and the connection workability of the washing machine or the washer / dryer. Since the connection is made by the connector 40 with resin housing, a space for at least the L5 dimension is required on the electric connection terminal 7 side of the motor. For this reason, it is preferable to extend the motor shaft 10 in the direction of 7b or 7c with respect to the motor shaft 10 shown in FIG. What is necessary is just to determine from an advantageous installation method.
[0045]
According to the above-described self-priming pump 22 of the present invention, as shown in FIGS. 12 and 13, the electric connection terminal 7 of the motor is provided perpendicular to the motor shaft 10 so as to have a dimension of L1-L2 (5 mm or more). The length of the pump can be reduced. Further, by providing the check valve 12 above the upper end of the blade of the pump runner 11 by L4 (1 mm or more), the check valve 12 can be shortened by the L3 dimension (5 mm or more), and the electric connection terminal 7 of the motor is connected to the motor shaft 10. On the other hand, even when the pumps are provided in parallel, the overall length of the pump is shortened by the length L3 (5 mm or more), so that a more compact self-priming pump can be provided.
[0046]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, since it can shorten lengthwise compared with the conventional pump drastically, it is suitable for installing in narrow space, such as a washing machine.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a structure of a self-priming pump according to an embodiment of the present invention.
FIG. 2 is an exploded sectional view (exploded view) showing the structure of the self-priming pump according to the embodiment of the present invention.
FIG. 3 is a plan view of a self-priming pump according to the embodiment of the present invention.
FIG. 4 is a plan view showing a self-priming pump according to an embodiment of the present invention, in which an electric connection terminal and a priming port / discharge port are provided parallel or perpendicular to a motor shaft.
FIG. 5 is a diagram related to the embodiment of the present invention, showing a flow of fluid in the pump when the pump self-primes.
FIG. 6 is a diagram related to the embodiment of the present invention, showing a flow of a fluid in the pump when the pump self-primes.
FIG. 7 is a partially enlarged sectional view of the inside of the pump according to the embodiment of the present invention.
FIG. 8 is a detailed view of a pump case according to the embodiment of the present invention.
FIG. 9 is a detailed view of a check valve according to the embodiment of the present invention.
FIG. 10 is a detailed view of a partition plate according to the embodiment of the present invention.
FIG. 11 is a sectional view showing an opening / closing stroke of a check valve and a position of the check valve with respect to a pump runner in the self-priming pump according to the embodiment of the present invention.
FIG. 12 is a plan view and a sectional view of a self-priming pump according to a conventional example.
FIG. 13 is a schematic dimensional comparison diagram comparing a conventional self-priming pump with the self-priming pump of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Pump case, 2 ... Water inlet for water absorption hose connection, 3 ... Partition plate, 4 ... Prime water, 5 ... Motor case, 6 ... Motor, 7 ... Motor electrical connection terminal, 7a ... Motor terminal direction (motor shaft) , 7b, 7c: Motor terminal direction (perpendicular to motor shaft), 8: Bag-shaped part for securing check valve opening / closing stroke of partition plate, 9: Shaft sealing member, 10: Motor shaft, 11: Pump runner , 12: check valve, 13: shaft sealing member mounting portion of motor case, 14: water suction hose for pumping, 15: priming port (parallel to motor axis), 15a / 15b: priming port (perpendicular to motor axis), 16 ... Discharge ports (parallel to the motor axis), 16a and 16b ... Discharge ports (perpendicular to the motor axis), 17 ... Suction water passage of pump case, 18 ... Pump chamber, 19 ... Gas-water separation chamber, 20 ... Suction chamber, 21: Check valve sealing part of pump case Outlet, 22 ... Self-priming pump of the present invention, 23 ... Conventional self-priming pump, 24 ... Opening of partition plate, 25 ... Pump runner side water passage portion of partition plate, 26 ... Conventional self-priming pump Check valve, 27: Sealing member when pump case and motor case are fixed, 28: Sealing member having elasticity for separating pump chamber, steam-water separation chamber, suction chamber, 29: Screw, 30: Motor cap, 31 ... Rib for fixing the check valve of the partition plate, 32 ... Partition plate mounting portion of the pump case, 33 ... Recessed portion for mounting the sealing member between the pump case and the partition plate, 34 ... Recessed groove portion for fitting the partition plate of the motor case, 35 ... gas-water separating plate, 36 ... check valve sealing surface, 37 ... check valve mounting groove of pump case, 38 ... pump case mounting protrusion of check valve, 39 ... pump runner suction port, 40 ... Housing for connecting electric connection terminals of motor 41, an elastic member for holding down the motor, 42, a front end of a water passage on the runner side of the partition plate, L, a conventional pump length, L1, a difference between the conventional pump and the maximum pump length of the present invention, L2 ... Length difference between the conventional pump and the pump of the present invention when the motor terminal is not included, L3 ... Dimensional difference between the front side of the conventional pump and the pump of the present invention, L4 ... From the upper end of the blade of the pump runner to the check valve Dimensions required for connecting a connector with an L5 housing, θ1: Opening / closing angle of the pump check valve of the present invention, θ2: Opening / closing angle of the check valve of the conventional pump, D1: Water passage area of the pump of the present invention , D2: suction port area of the partition plate.

Claims

A pump case having a suction port for connecting a suction hose connected to a water suction hose for pumping, a priming port for supplying priming water for self-priming, a pump case having a discharge port for discharging sucked water, and a motor. A motor case having a shaft sealing member mounting portion of a shaft sealing member for sealing a shaft portion of a pump runner directly connected to a motor shaft, and a pump runner chamber and a gas-water separation chamber provided with the pump runner inside the case. In a self-priming pump provided with a partition plate for partitioning the suction chamber and a check valve for preventing backflow of the pumped water,
The self-priming pump is characterized in that the check valve is disposed near an extended line extending in the outer peripheral direction at a boundary portion between the suction port of the pump runner and the suction chamber and on the upper side of the outer circumference of the pump runner chamber.

The self-priming pump according to claim 1,
The passage cross section of the suction water passage section vertically descending from the water suction port for connecting the water suction hose of the pump case is formed in an elliptical shape, and the major axis direction of the ellipse crosses the axial direction of the motor shaft which is placed substantially horizontally. The check valve sealing portion discharge port of the pump case communicating with the suction water passage portion also has a horizontally long elliptical shape so that the major axis direction is substantially horizontal, and the check valve sealing portion discharge port is sealed. A self-priming pump characterized in that a check valve for stopping is also formed in a horizontally long elliptical shape according to a check valve sealing portion discharge port.

A pump case having a water inlet for connecting a water suction hose for pumping and a priming port for supplying priming water for self-priming, a pump case having a discharge port for discharging sucked water, and a motor housing and a motor shaft. A motor case having a shaft sealing member mounting portion of a shaft sealing member for sealing a shaft portion of a pump runner to be directly connected, and a pump runner chamber, a gas-water separation chamber, and a suction chamber provided with the pump runner inside the case. A self-priming pump provided with a check plate and the like for preventing a backflow of the pumped water,
The partition plate is provided with an opening / closing stroke securing bag-shaped portion for accommodating the check valve so that the opening / closing stroke of the check valve can be secured. A self-priming pump formed to protrude toward a separation chamber.

A pump case having a water inlet for connecting a water suction hose for pumping and a priming port for supplying priming water for self-priming, a pump case having a discharge port for discharging sucked water, and a motor housing and a motor shaft. A motor case having a shaft sealing member mounting portion of a shaft sealing member for sealing a shaft portion of a pump runner to be directly connected, and a pump runner chamber, a gas-water separation chamber, and a suction chamber provided with the pump runner inside the case. A self-priming pump provided with a check plate and the like for preventing a backflow of the pumped water,
The motor shaft of the motor is disposed so as to be parallel to a fluid surface such as priming water,
A self-priming pump characterized in that the electric connection of the motor is oriented perpendicular to the motor shaft.

A pump case having a water inlet for connecting a water suction hose for pumping and a priming port for supplying priming water for self-priming, a pump case having a discharge port for discharging sucked water, and a motor housing and a motor shaft. A motor case having a shaft sealing member mounting portion of a shaft sealing member for sealing a shaft portion of a pump runner to be directly connected, and a pump runner chamber, a gas-water separation chamber, and a suction chamber provided with the pump runner inside the case. A self-priming pump provided with a check plate and the like for preventing a backflow of the pumped water,
The motor shaft of the motor is disposed so as to be parallel to a fluid surface such as priming water,
The self-priming pump, wherein the discharge port or the priming port is formed on a side surface of an upper part of a pump case.