JP2004360708A

JP2004360708A - Solenoid valve

Info

Publication number: JP2004360708A
Application number: JP2003124783A
Authority: JP
Inventors: Hitoshi Kibune; 仁志木船; Masayuki Imai; 正幸今井
Original assignee: Fujikoki Corp
Current assignee: Fujikoki Corp
Priority date: 2003-02-21
Filing date: 2003-04-30
Publication date: 2004-12-24

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solenoid valve structured so that the refrigerant passing sound is reduced in the dehumidifying operation. <P>SOLUTION: The solenoid valve is opened and closed when its valve element 4 is contacted with and separated from a seat part 6a by a solenoid coil 2. The valve element 4 is provided with a bleeder hole 44 on its refrigerant influx side and a large diametric hole 43b and a small diametric hole 43c having communication with the bleeder hole 44. A first porous member 51 to make finer the bubbles is held on the refrigerant influx side of the valve element 4. A minor bubble holding passage D to hold the condition of the bubbles being made finer is formed on the refrigerant flowout side of the large diametric hole 43b and the small diametric hole 43c of the valve element 4 where a second porous member 52 to make finer the bubbles is installed in the small diametric hole 43c. The small bubble holding passage D is formed in a diffuser structure. The porous members 51 and 52 are made of foaming metal. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、空気調和機等に使用する電磁弁に関する。
【０００２】
【従来の技術】
従来、弁本体に設けたプランジャチューブの周囲にソレノイドコイルを設け、プランジャチューブ内において弁本体側に可動吸引子、他側にプランジャを設け可動吸引子とプランジャ間に開弁ばねで付勢された状態で、プランジャと弁体をカシメにより結合して収納した通電時閉型電磁弁が知られている。
【０００３】
かかる従来の電磁弁を冷凍サイクルで除湿運転を行う空気調和機に用いた場合に、除湿運転の絞りとして弁体に孔を設けることが行なわれる。しかしながら、弁体に孔を設けた場合には、絞り作用に伴ない冷媒流動音が発生する場合があり、発生した場合には騒音となるという間題点があった。
【０００４】
そこで、この騒音を低減する技術が下記の特許文献１に開示されている。この特許文献１には、除湿モードを有する空気調和機で除湿用絞り弁として使用される絞り装置として、絞り通路における冷媒通過音を低減し、長期間の使用においても除湿運転性能を得ることができる絞り装置が示されている。しかしながら、この装置においても冷媒通過音の低減について期待される効果をあげていないのが現状である。
【０００５】
【特許文献１】特開２００２−３１０５４０号公報
【０００６】
【発明が解決しようとする課題】
そこで、本発明者らは、上記従来技術を考慮しつつ、更に冷媒通過音の低減を目的として技術の開発をおこなったもので、本発明は、弁体に気泡を細分化する部材を一体に組付けると共に、細分化された気泡が再び大きく成長しないようにして、冷媒流動音を一層低減し、騒音の発生を抑制した電磁弁を提供することを目的とする。また、本発明は、細分化された気泡を弁座等の通過壁面に衝突させることで冷媒の流速を小さくして、更に冷媒流動音を低減できる電磁弁を提供することを目的とする。
さらにまた、冷媒と冷凍機油とにより所謂スラッジが生成され、これがコンタミネーションとして上記部材に付着した場合には流路を塞ぎ、流量不足が生じるという不具合の発生することがあるが、本発明は係る不具合を防止できる電磁弁を提供することを目的とする。
【０００７】
【課題を解決するための手段】
上記目的を達成するために、本発明に係る電磁弁は下記の手段を講じた。即ち、
請求項１記載の電磁弁は、電磁コイルにより弁体を弁座部に対して接離させることにより弁の開閉を行う電磁弁において、上記弁体にはその冷媒流入側に孔とこの孔に連通する通路が設けられると共に、上記弁体の冷媒流入側に気泡を細分化する第１の部材が上記弁体に保持され、且つ、上記通路の冷媒流出側には、細分化された気泡の状態を保持させる流路が形成されていることを特徴とする。
【０００８】
請求項２記載の電磁弁は、請求項１記載の電磁弁において、上記弁体内の上記通路内に気泡を細分化する第２の部材が配置されていることを特徴とする。
請求項３記載の電磁弁は、電磁コイルにより弁体を弁座部に対して接離させることにより弁の開閉を行う電磁弁において、上記弁体にはその冷媒流入側に孔とこの孔に連通する通路が設けられると共に、該通路内に気泡を細分化する第１の部材が設けられ、更に、前記通路の冷媒流出側には、細分化された気泡の状態を保持させる流路が形成されると共に、該流路の下流側に気泡を細分化する第２の部材が配置されていることを特徴とする。
請求項４記載の電磁弁は、請求項１乃至請求項３記載のいずれかの電磁弁において、上記細分化された気泡の状態を保持させる流路は、インデューサ部、オリフィス部及びディフューザ部が連続空間として形成される小気泡保持流路からなることを特徴とする。
【０００９】
請求項５記載の電磁弁は、請求項４記載の電磁弁において、前記小気泡保持流路は、上記流路に配置された案内環部材と案内部材とから構成され、案内環部材の内周には、下方程狭くなる漏斗状の入口側傾斜部、均一内径の均一径部、及び、下方程拡くなる逆漏斗状の出口側傾斜部が連続して形成され、且つ、上記案内部材には上記案内環部材の内周部に挿通される柱状部が形成され、前記インデューサ部は、入口側傾斜部と上記柱状部の間に形成され、オリフィス部は均一径部と上記柱状部の間に形成され、且つ、ディフューザ部は出口側傾斜部と上記柱状部の間に形成される連続空間であることを特徴とする。
請求項６記載の電磁弁は、請求項１乃至請求項５記載のいずれかの電磁弁において、上記第１及び第２の部材が、発泡金属、多孔質プラスチック、金属の糸を編んだメッシュ、また複数の孔を穿設した金属板からなることを特徴とする。
【００１０】
請求項７記載の電磁弁は、弁室を有すると共に、一端を閉塞したパイプ部を有する弁本体と、弁本体のパイプ部の外周に装置された電磁コイルと、弁本体のパイプ部の内部に固定された吸引子と、吸引子に弁本体のパイプ部の長手方向に摺動自在に設けた棒状の弁体と、弁体に連結されたプランジャと、弁本体の開口端に設けた弁座シート部材と、吸引子とプランジャとの間に配設された弁体を弁座シート部材と反対方向の開弁方向に向って付勢する開弁用付勢手段とを備え、上記弁座シート部材に弁本体の弁室の内部に臨んで弁体の離接する弁座を形成し、前記電磁コイルにより弁体を弁座部に対して接離させることにより、弁の開閉を行う電磁弁において、上記弁体には上記弁体の冷媒流入側に孔とこの孔に連通する通路が設けられると共に、上記弁体の冷媒流入側又は冷媒流出側、及び、上記通路内に気泡を細分化する部材が設けられ、且つ、上記通路には細分化された気泡の状態を保持させる小気泡保持流路が形成されていることを特徴とする。
請求項８記載の電磁弁は、請求項１乃至請求項７記載のいずれかの電磁弁において、上記弁体内の上記通路の出口から出る冷媒の流出方向が、上記弁体が当接する弁座部の内壁面と交わるように形成されていることを特徴とする。
かかる本発明の電磁弁によれば、気泡を細分化する部材により冷媒中の気泡を細分化でき、しかも、細分化された気泡の状態を保持させる流路が形成されているので、冷媒流動音を抑制し、騒音の発生を防止できる電磁弁を実現できる。また、細分化された気泡の状態を保持させたまま、冷媒の流速を下げることで、一層の冷媒流動音の抑制を図る。
【００１１】
請求項９記載の電磁弁は、請求項３乃至請求項８記載のいずれかの電磁弁において、上記第１の部材の幅に対して、上記第２部材の幅を大としたことを特徴とする。
かかる特徴によれば、冷媒と冷凍機油とにより、所謂スラッジが生成され、これがコンタミネーションとなった場合にそのコンタミネーションが第２の部材の表面に付着して流路を塞ぎ、流量不足となる恐れが生じることがあるが、第１の部材に対し第２の部材の体積或いは表面積を増大させることで、冷媒の運動エネルギーを低下させることに加えて、コンタミネーションが仮に付着しても、十分な流量を確保できる。
【００１２】
請求項１０記載の電磁弁は、請求項１乃至請求項９記載のいずれかの電磁弁において、上記第１の部材に対して、冷媒の流入方向をその中心位置から偏心させることを特徴とする。
請求項１１記載の電磁弁は、請求項３乃至請求項１０記載のいずれかの電磁弁において、上記第２の部材に冷媒を流入させるに当って、その流入位置を該第２の部材の中心位置から偏心させると共にその流入方向を傾斜させることを特徴とする。
かかる請求項９，請求項１０，或いは請求項１１記載の発明の特徴によれば、冷媒が、気泡を細分化する第１の部材及び第２の部材中を、より長い距離を経て通過させることで、冷媒流動音を一層低減し、騒音の発生を一層抑制する。
【００１３】
【実施形態１】
先ず、実施形態１について、図１乃至図３に従って説明する。図１はその電磁弁の開状態の縦断面図、図２は図１のＡ部の拡大図、図３は閉状態の縦断面図である。なお、下記の説明において、図面との関係において上下左右の表現を用いるが、実際の位置関係はこれに限るものではない。
【００１４】
本発明の電磁弁は、図１に示すように、弁本体１の内部に弁室１０を有すると共に、弁本体１の上部には吸引子３の係止部３ａを介して、一端を閉塞したパイプ部３ｂが装着されており、上記パイプ部３ｂの外周には電磁コイル２が装備され、パイプ部３ｂの内部には、吸引子３に対してパイプ部３ｂの長手方向に摺動自在に棒状の弁体４が設けられている。また、この電磁弁は、パイプ部３ｂ内に、弁体４に連結されたプランジャ５と、弁本体１の下部開口端に設けた弁シート６と、吸引子３とプランジャ５との間に配設されたコイルスプリング７と、を備えている。なお、コイルスプリング７は、弁体４を弁シート６と反対方向の開弁方向に向って付勢する開弁用付勢手段である。
【００１５】
弁シート６には、図１に示すように、弁本体１の弁室１０の内部に臨んで弁体４の離接する弁座部６ａが形成され、弁シート６は弁本体１に溶接・固着されている。なお、弁本体１と弁シート６はステンレススチールよりなり、弁本体１及び弁シート６はプレス加工により成形されている。
【００１６】
上記パイプ部３ｂの外周には、図１に示すように、電磁コイル２を収容するコイルケース８が装備され、コイルケース８に固定された押圧係止部材９が弁本体１のパイプ部３ｂに形成した係止凹部３ｄに係止され、コイルケース８が押圧係止部材９を介して弁本体１のパイプ部３ｂに固定されている。
【００１７】
弁本体１の円筒状の周壁１ａの内部には、図１に示すように、弁室１０が形成され、弁本体１の周壁１ａには垂直な中心軸線と直交する方向にパイプ嵌合孔１ｂが設けられ、入口側パイプ１００が接続・溶着されている。
また、弁本体１の周壁１ａの下端は、弁シート６が装着される。該弁シート６は、パイプ状の弁座部６ａと、該弁座部６ａの下部に形成されたパイプ嵌合部６ｂと、該パイプ嵌合部６ｂの外周部に形成されたフランジ６ｃと、からなり、該フランジ６ｃの外周部に周壁１ａが溶着される。
【００１８】
また、弁本体１の周壁１ａの上端には吸引子３が装着される。該吸引子３はその下部に段部３ｃが形成され、該段部３ｃの下部には弁本体１の周壁１ａの上端が装着されている。また、前記吸引子３の上部外周に形成されている係止凹部３ｄにはパイプ部３ｂの下部が装着されている。また、このパイプ部３ｂの上端は閉塞されている。
【００１９】
上記弁シート６下部に形成されたパイプ嵌合部６ｂには出口側パイプ１１０が接続・溶着されている。弁本体１の上部には、図１に示すように、弁室１０の上側に円筒状の吸引子３が配設され、該吸引子３の外周面には係止凹部３ｄが形成され、更に吸引子３の上部外周部にはパイプ部３ｂがカシメ加工により固定されている。また、上記吸引子３の下部には下部の弁室１０に連通する凹部が形成されて上部弁室１１を構成している。
【００２０】
吸引子３には、図１に示すように、これを貫通する例えば真鍮製の棒状の弁体４がパイプ部３ｂの長手方向に沿って摺動自在に設けられ、弁体４の下端部には弁シート６の弁座部６ａに離接する弁部４０が形成され、弁体４の上端部には小径部４６が形成されている。この小径部４６がプランジャ５下部の固定用孔５ａに嵌合・固定されることになる。
【００２１】
弁部４０には、その上方の弁棒部分より径大に形成され、その段部となる肩部４１が形成されると共にこれを介して円筒状の側壁部４２が形成され、また、該側壁部４２の内部には空間部４３ａが形成される。
【００２２】
上記弁部４０には、図２に示すように、その中心部において、空間部４３ａに連通する径大孔４３ｂ、及び該径大孔４３ｂに連通する径小孔４３ｃが形成され、この径小孔４３ｃに連通して横断面積が小さい孔、即ち、ブリード孔４４が横方向（したがって、径小孔４３ｃの軸線方向と直角方向）に形成されている。そして、前記ブリード孔４４は両端部に入口側径大部４４ａが形成され、該入口側径大部４４ａを介して上部弁室１１に開口している（図１の開弁状態）。但し、図３に示す閉弁状態においては、弁室１０で開口する。
【００２３】
上記弁部４０の肩部４１の上部でブリード孔４４の開口に臨ませて冷媒中の気泡を細分化する部材として第１の多孔質部材５１が保持される。この第１の多孔質部材５１は、肩部４１の上部に載置され、保持突部４８により支持される。即ち、この第１の多孔質部材５１は、所定厚さの円環形状に形成され、その円環の上面内周部を弁部４０の保持突部４８にてカシメ固定されることにより弁部４０に固定・保持される。
【００２４】
更に、弁部４０の径小孔４３ｃ及び径大孔４３ｂ内には第２の多孔質部材５２が内挿されている。該第２の多孔質部材５２は異径の円柱状で縦断面逆Ｔ形に形成されており、その大径部は径大孔４３ｂ内に配置され、小径部は径小孔４３ｃ内に配置される。また、上記多孔質部材５２は、下方から後述の案内部材６０の柱状部６１に支持される。なお、多孔質部材５１とブリード孔４４との間には、上下幅の大きい隙間（入口側径大部４４ａ）が形成され、また、多孔質部材５２とブリード孔４４との間には、上下幅の大きい隙間４３ｆが形成されていることから、多孔質部材５１，５２内での冷媒の流路範囲が広がり、気泡の細粒化が促進される。
【００２５】
上記各多孔質部材５１，５２は、例えば発泡金属が用いられる。その他、多孔質プラスチックを用いてもよく、ステンレス、真鍮等の金属の糸を編んでメッシュ状に所定の厚さに成形した金網部材（例えば東亜鉄網株式会社製商品名「アキュームメッシュ」）を用いてもよい。さらには所定の厚さの金属板に所定数の貫通穴を形成したものを用いてもよい。なお、これらの多孔質部材の素材は後述の実施形態２乃至実施形態４においても同様である。
【００２６】
更に、弁部４０における径大孔４３ｂ及び空間部４３ａ内には、細分化気泡の状態を保持させるための小気泡保持流路Ｄが、案内環部材４７及び案内部材６０によって形成される。
【００２７】
上記案内環部材４７は所定厚みの環状部材からなり、その内面は下方程狭くなる漏斗状の入口側傾斜部４７ａ、該入口側傾斜部４７ａに連続する均一内径の均一径部４７ｂ、及び、下方程拡くなる逆漏斗状の出口側傾斜部４７ｃと、が上方から下方に順次形成されている。また、この案内環部材４７は図１に示すように、弁体４の先端４５でカシメ固定されている。
【００２８】
また、上記案内部材６０は、円盤状のフランジ部６３と、該フランジ部６３の軸心位置に立設された柱状部６１と傾斜部６２と、からなる。上記フランジ部６３には、図２に示すように、通孔６４が複数個形成されており、弁部４０内の冷媒はこの通孔６４から出口側パイプ１１０に直接流出することになる。
前記案内部材６０に配置される柱状部６１は、上面が半球状の円柱体からなり、上記均一径部４７ｂの内面とは隙間（オリフィス）を形成させるために、僅かに小さい径として形成されている。また、柱状部６１に連続する傾斜部６２は、下方ほど径大となっている。
したがって、上記案内環部材４７と案内部材６０との間にインデューサ部（前記下方程狭くなる漏斗状の入口側傾斜部４７ａと柱状部６１の間）、均一流路面積のオリフィス部（前記均一内径の均一径部４７ｂと柱状部６１の間）、及び、ディフューザ部（前記下方程拡くなる逆漏斗状の出口側傾斜部４７ｃと柱状部６１の間）が連続空間として形成されることになる。そして、これらの間を流動する冷媒は、そのエネルギは比較的緩やかに速度エネルギに変換され、急激な収縮・膨張が行われないことから、冷媒内に気泡が含まれている場合にも、気泡の急激な成長（膨張）は発生しない。したがって、冷媒中に細分化された気泡があっても、大きく成長させないことから、これらの部分を本発明では、「小気泡保持流路Ｄ」と称する。
【００２９】
また、弁本体１のパイプ部３ｂの上端寄りの内部には、図１に示すように、円筒状のプランジャ５が移動自在に配設され、プランジャ５の端壁には垂直な中心軸線上に沿って弁体４の小径部４６を固定するための固定用孔５ａが設けられている。なお、符号５ｂは均圧孔である。
【００３０】
該固定用孔５ａには、図１に示すように、下方より弁体４の小径部４６が嵌入され、弁体４の小径部４６の先端にカシメ止め加工を施すことにより、プランジャ５は弁体４の小径部４６に連結されている。
【００３１】
上記弁体４の外側には、図１に示すように、吸引子３とプランジャ５との間に開弁用のコイルスプリング７が配設され、プランジャ５はコイルスプリング７の付勢力により吸引子３と離間する方向に常時付勢されている。
【００３２】
弁シート６は、図１に示すように、弁本体１と同一中心軸線上に円筒状に形成され、その上端には入口側パイプ１００の中心軸線に近づけて弁座部６ａが形成され、弁シート６の下端には段部を介してパイプ嵌合部６ｂが形成され、該パイプ嵌合部６ｂの端縁には外方に向って張出したフランジ６ｃが形成されている。
【００３３】
弁本体１の弁室１０には、図１に示すように、弁部４０に臨んで弁シート６の弁座部６ａが配置され、弁本体１の下縁部には弁シート６のフランジ６ｃが当接され、両部分はアーク溶接、例えばＴＩＧ溶接がなされている。
【００３４】
弁シート６には、図１に示すように、出口側パイプ１１０が接続され、弁シート６のパイプ嵌合部６ｂには下方より出口側パイプ１１０の一端部が嵌入され、水素炉中銅ろう付け手段などの雰囲気ろう付けにより溶着されている。
【００３５】
弁シート６の弁本体１に対する組付けは、まず、弁シート６の中心軸線が弁本体１の周壁１ａの中心軸線と一致するように位置合わせし、弁シート６の弁座部６ａを弁本体１の弁室１０の内部に下方より挿入すると共に、弁シート６のフランジ６ｃを弁本体１の下縁部に当接し、ＴＩＧ溶接手段により溶着して組付けられる。
【００３６】
上記パイプ部３ｂの外側には、図１に示すように、ボビン１２０が嵌合装着され、ボビン１２０の周囲には電磁コイル２が巻回され、ボビン１２０はコイルケース８の内部に収容されている。上記ボビン１２０には、図１に示すように、リード線１４０が接続され、電磁コイル２にはリード線１４０を介して通電される。
【００３７】
また、コイルケース８の互いに対向する水平な上壁８０及び下壁８１には垂直な同一中心軸線上に沿って貫通孔８２及び貫通孔８３がそれぞれ設けられ、パイプ部３ｂが挿通されている。
【００３８】
また、コイルケース８の上壁８０の上部には、図１に示すように、板金製の押圧係止部材９が配設され、該押圧係止部材９は、平板状の本体９０を有し、その一端には下方に向って直角に折曲した垂下部９２が形成され、また、押圧係止部材９の本体９０の他端には上方に向って直角に折曲した立上り部９４が形成され、該の立上り部９４には弁本体１のパイプ部３ｂの係止凹部に係合する突起９５が形成されている。
【００３９】
コイルケース８の上壁８０の上部には、図１に示すように、押圧係止部材９の本体９０が載置され、リベット１５０を介してコイルケース８に固定されている。
【００４０】
次に、本発明の実施形態１の作用について説明する。
先ず、除湿運転について説明する。この電磁弁は、電磁コイル２に通電すると、吸引子３に電磁コイル２の通電により磁力が発生し、吸引子３がプランジャ５を下方に向って吸引し、プランジャ５が弁本体１のパイプ部３ｂの内部を吸引子３の吸引によりコイルスプリング７の付勢力に抗しながら下方に向って移動すると同時に、弁体４が吸引子３に案内されながらプランジャ５と共に弁シート６の弁座部６ａに向って下方に移動し、図３に示すように、弁体４の弁部４０が弁シート６の弁座部６ａに密接し、電磁弁は閉弁状態となる。
【００４１】
かかる閉弁状態において、入口側パイプ１００と、出口側パイプ１１０とは、弁室１０、上部弁室１１、入口側径大部４４ａ、ブリード孔４４、径小孔４３ｃ、径大孔４３ｂ、及び空間部４３ａを介して連通する。そこで、所定冷凍サイクルの除湿運転時において、冷媒を入口側パイプ１００から流すと、弁体４にはブリード孔４４が設けてあるので、絞り作用を受ける上記冷媒は分散され、冷媒の流量及び運動エネルギーが小さくなり、冷媒の流動音は低減される。しかも、絞り作用を受けて径小孔４３ｃから出口側パイプ１１０に流出する冷媒に気泡が発生しても、冷媒は気泡を細分化する部材として第１多孔質部材５１及び第２多孔質部材５２を通過する際に、冷媒中の気泡は細分化され、気泡による冷媒の流動音が低減される。
更に、本発明は前記小気泡保持流路Ｄを設け、細分化後の冷媒を通過させることから、細分化された気泡は、再び気泡が成長して大きくなることなく、出口側パイプ１１０に流入し、上記冷凍サイクルにおいて冷却及び除湿を行う。
【００４２】
また、電磁コイル２への通電を遮断すると、吸引子３に磁力が発生せず、吸引子３は吸引力を失い、プランジャ５が弁本体１のパイプ部３ｂの内部をコイルスプリング７の付勢力により吸引子３と反対方向の上方に向って移動すると同時に、弁体４が吸引子３に案内されながらプランジャ５と共に上方に向って移動し、図１，２に示すように、弁部４０が弁シート６の弁座部６ａから離間し、流体が入口側パイプ１００から弁室１０及び弁シート６の内部を通って出口側パイプ１１０へと流通し、電磁弁は開弁操作を行う。
符号を追加して、説明を加える。おおきな隙間を形成したことで、流路面積が大きくなる。流路範囲が拡大することで、耐久性を向上できる。
【００４３】
【実施形態２】
次に、実施形態２について説明する。
図４は実施形態２に係る電磁弁の開状態の縦断面図、図５は図４のＢ部の拡大図、図６は同電磁弁の閉状態の縦断面図である。
図４乃至図６に示す実施形態２は、図１乃至図３に示す実施形態１において、第１多孔質部材５１に代えて、小気泡保持流路Ｄにおける柱状部６１の下流側に多孔質部材５３に設けた場合を示し、この場合においても、冷媒流動音を低減させることができる。
【００４４】
したがって、実施形態２においては、実施形態１とは多孔質部材を設ける位置が異なり、他の構成は同一であるので、図１と同一部分には同一の符号を付して説明を省略する。
実施形態２において、特に図５に示すように、気泡を細分化する部材として多孔質部材５３を、空間部４３ａ内において案内部材６０’の傾斜部６２’の外周部にリング状に形成したものを配置している。この多孔質部材５３は案内部材６０におけるフランジ部６３’の上部に載置され、空間部４３ａを横断する状態で弁体４に圧入して配置されている。また、フランジ部６３’の上面は多孔質部材５３を支持させるために二段の平面に形成されている。
【００４５】
かかる電磁弁においても、実施形態１と同じく電磁コイル２に通電すると図６に示す如く電磁弁は閉弁操作となる。かかる閉弁状態において、入口側パイプ１００と出口側パイプ１１０とは、弁室１０、上部弁室１１、ブリード孔４４、径小孔４３ｃ、径大孔４３ｂ、及び空間部４３ａを介して連通する。
そこで、所定冷凍サイクルの除湿運転時において、冷媒を入口側パイプ１００から流すと冷媒中の大きな気泡は、第１の多孔質部材５２を通過する際に細分化され、その細分化された状態で小気泡保持流路Ｄに流入し、更に、第２の多孔質部材５３を通過して、気泡が細分化された状態のまま通孔６４を介して出口側パイプ１１０に流出する。
【００４６】
即ち、冷媒は弁部４０内のブリード孔４４等により分散され、しかも冷媒中の気泡は細分化されているので、冷媒の流動音は低減され空間部４３ａ内に流入する。この空間部４３ａ内で、更に気泡は多孔質部材５３を通過する際に更に細分化され、出口側パイプ１１０に流入するので、気泡による冷媒流動音は低減され、冷凍サイクル内で冷却・除湿作用を行わせることができる。
【００４７】
なお、実施形態２において、多孔質部材５３として実施形態１と同様に発泡金属、多孔質プラスチック又はアキュームメッシュ等を用いることができるのは勿論である。さらには、真鍮、ステンレス材等の金属板に所定数の貫通穴を形成したものを用いることができる。
【００４８】
【実施形態３】
次に、実施形態３について説明する。図７は実施形態３に係る電磁弁の開状態の縦断面図、図８は図７のＣ部の拡大図である。なお、実施形態３の説明において、図１乃至図３に示す実施形態１及び図４乃至図６に示す実施形態２と同一構成要素については、図７及び図８に同一の符号を付して説明を省略する。
【００４９】
図７及び図８に示す実施形態３は、図４乃至図６に示す実施形態２に対して下記の点で異なる。即ち、案内部材６０”の柱状部６１”を均一径の柱状体とし、その上端部を弁体４の径小部４３ｃの更に上方に形成された支持孔４３ｄに圧入により係合させる。また、この支持孔４３ｄには必要に応じて冷媒の抜孔４３ｅが形成される。上記径小部４３ｃ内には環状の多孔質部材５４が嵌合される。また、該多孔質部材５４と柱状部６１との間には、冷媒の流動性を向上させるために隙間４３ｇが形成される。
【００５０】
上記多孔質部材５４を下方から支持させるように配置される案内環部材４７’は、ブリード孔４４の下方近傍からフランジ６３’の上面まで上下に長く形成され、その結果、小気泡保持流路Ｄが上下に長く形成されると共に、案内環部材４７’の下部には出口側径大部４７ｄを介して第３の多孔質部材５３が保持されている。また更に、第３の多孔質部材５３とフランジ部６３’との間には径大隙間部６４ａが形成されている。
【００５１】
実施形態３は、特に図８に示すように、気泡を細分化する部材として多孔質部材５１，５３，５４を３個所とすること、及び、各多孔質部材５１，５３，５４の流路の前後に、径大部４４ａ，４４ｂ、隙間４３ｇ、径大部４７ｄ，６４ａを形成することで、各多孔質部材５１，５３，５４内での流路を拡大させ、泡の細分化を一層確実とし、冷媒流動音を一層低減させることができる。
【００５２】
また、案内環部材４７’は、ブリード孔４４の下方近傍からフランジ６３’の上面まで上下に長く形成され、小気泡保持流路Ｄが上下に長く形成されることで、インデューサ部、オリフィス部及びディフューザ部が連続空間として、より長く形成されるから、流路断面積の変化が緩慢となり、泡の成長が少ないという効果がある。
【００５３】
また、実施形態３の電磁弁を構成する案内部材６０”、案内環部材４７’、多孔質部材３３，５４は、上記柱状部６１”を軸とする同軸配置となっていることから、組立性、一体性、機能の安定性が良いという付随的効果もある。
【００５４】
【実施形態４】
次に、実施形態４について説明する。図９は実施形態４に係る電磁弁の要部拡大図、図１０は実施形態４に係る電磁弁の閉状態の縦断面図である。
実施形態４は、図７及び図８に示す実施形態３の通孔６４を、図９に示すように、傾斜させて穿設することで、冷媒の流出方向が拡大するに斜孔６４ｂとしている。そして、この点以外は、実施形態３と同じであることから、その他の構成部分は、図９及び図１０に図７及び図８に付した符号と同一符号を付すことで説明を省略する。
【００５５】
実施形態４は上記構成により、斜孔６４ｂから流出する冷媒を弁座部６ａの内側の側壁にぶつけることで、冷媒の運動エネルギを減少させ、一層騒音をなくするようにしたものである。なお、このような斜孔６４ｂは実施形態１，２にも適用できることはいうまでもない。
【００５６】
【実施形態５】
さらに、実施形態５について説明する。図１１は実施形態５に係る電磁弁の開状態の縦断面図、図１２は図１１のＥ部の拡大図である。
実施形態５は、実施形態３に示す通孔６４を形成する位置を多孔質部材５３’の上流側に配置したことを特徴としている。即ち、実施形態５においては、案内環部材４７’の下部つまり下流側に形成された径大隙間部４７ｅと案内部材６０ｂの下部に設けられている円盤状のフランジ部６３’に形成された径大隙間部６４ａとの間を連通する通孔６４’が複数個、例えば６個設けられている。
【００５７】
さらに、径大隙間部４７ｅの下流側に通孔６４’、さらに、径大隙間部６４ａの下流側に多孔質部材５３’が設けられ、該多孔質部材５３’は側壁部４２’に設けられると共に弁部４０ｂの端部にてカシメ固定され、通孔６４’を介して流れる冷媒が多孔質部材５３’を通過して出口側通路１１０へ流出する。
【００５８】
また、実施形態５では、案内部材６０ｂの柱状部６１ａの上流側に多孔質部材５４ａを設け、多孔質部材５１ａを通過した冷媒は側壁部４２’に設けられた径大部４４ｃが形成する空間を経てブリード孔４４’を通り、側壁部４２’に設けられた径大部４４ｄが形成する空間を経て多孔質部材５４ａに流入する。なお、ブリード孔４４’は上下に並設されて形成されている。そして、多孔質部材５４ａを通過した冷媒は、案内環部材４７’の上部つまり上流側に形成された入口側径大部４７ｆが形成する空間を経て案内環部４７’と案内部材６０ｂの柱状部６１ａとで形成される小気泡保持流路Ｄに流入する。
【００５９】
かかる構成の実施形態５によれば、冷媒中の気泡を細分化する部材として多孔質部材５１ａ，５４ａ，５３’を３個所とすること、及び、各多孔質部材５１ａ，５４ａ，５３’の流路の前後に、径大部４４ｃ，４４ｄ、径大部４７ｆ，４７ｅを形成することで、各多孔質部材５１ａ，５４ａ，５３’内での流路を拡大させ、泡の細分化を一層確実とし、冷媒流動音を一層低減させることができる。しかも、通孔６４’を多孔質部材５３’の上流側に配置することにより、冷媒が通孔６４’を通過する際に冷媒流動音が発生する場合が生じても、多孔質部材５３’を通過することで低減することができる。
【００６０】
なお、図１１及び図１２において、図７及び図８と同一部分には同一符号を付して説明を省略している。
【００６１】
【実施形態６】
さらに、実施形態６について図面に従って説明する。図１３は実施形態６に係る電磁弁の開状態の縦断面図、図１４は同電磁弁の要部拡大図、図１５は図１４のＢ−Ｂ線断面図、図１６はフランジ部の平面図、図１７は図１６のＡ−Ａ線断面図、図１８は図１４のＢ−Ｂ線断面の別例図である。なお、実施形態６の説明において、他の実施形態１乃至実施形態５と同一の構成要件を具備する点については、図１３乃至図１８において、図１乃至図１２に付した符号と同一の符号を付すことによって、その他の構成要件の説明を省略する。
【００６２】
実施形態６の特徴は、実施形態５の電磁弁と比べると、第２の部材を構成する多孔質部材５３’の幅を、第１の部材を構成する多孔質部材５４ｂの幅に比べて大きくしたこと、ブリード孔４４”の開孔方向を多孔質部材５４ｂの中心部方向以外の方向に穿設したこと、及び、案内部材６０ｃのフランジ部６３ａに穿設される斜孔６４ｂ’を円周方向に傾斜させて穿設した点にある。
【００６３】
先ず、実施形態６の第１の特徴である多孔質部材５３’の幅について説明すると、図１４に示すように、主として冷媒中の気泡を細分化する多孔質部材５４ｂの体積に対して、主として、騒音の発生を抑止・低下させる多孔質部材５３’の体積を増大させた点にある。そのために、上記多孔質部材５４ｂの幅に対して、多孔質部材５３’の幅を増大させた点にあり、本実施形態６は、このような第１の特徴により、第２の部材である多孔質部材５３’における冷媒の通過流路を拡大させて冷媒が持つ運動エネルギを低下させることで、一層の消音効果を向上させることができる。
しかも、冷媒と冷凍機油とにより所謂スラッジが生成され、これがコンタミネーションとなった場合には、そのコンタミネーションが第２の部材の表面に付着することがあり、流路を塞ぎ、流量不足となる恐れが生じるが、本実施形態では、第１の部材に対し第２の部材の表面積を拡大することで、冷媒の運動エネルギーを低下させることに加えて、コンタミネーションが付着しても、十分な流量を確保できるのである。
【００６４】
次に、実施形態６の第２の特徴について説明すると、図１５に示すように、多孔質部材５４ｂに対して冷媒の流入孔として弁部４０ｃに形成されるブリード孔４４”の孔軸方向を、多孔質部材５４ｂの中心部に向けて形成するのではなく、多孔質部材５４ｂの中心部以外の方向に向けて形成するものである。即ち、ブリード孔４４”の形成位置をそのブリード孔４４”の流路が多孔質部材５４ｂの中心部から外れる方向に形成するのである。なお、図ではブリード孔４４”を複数個、例えば、２個形成する場合を示している。
このような構成により、ブリード孔４４”から多孔質部材５４ｂに流入した冷媒は、多孔質部材５４ｂ内を通過する際に多孔質部材５４ｂとの接触面積・時間を増加させることができ、消音機能を一層向上させる点にある。なお、このような技術思想は、例えば、図１８（Ａ）に示すように、ブリード孔４４”を多孔質部材５４ｂの外周面の接線方向に形成すること、或いは、図１８（Ｂ）に示すように、より多数のブリード孔４４”を複数個形成することなどによっても実現できる。
なお、実施形態６の上記第２の特徴を省略して、ブリード孔４４”の流路を多孔質部材５４ｂの中心部に向かう方向に形成し、第１の特徴である多孔質部材５３’の体積及び表面積を、多孔質部材５４ｂのそれより増大させることのみとしてもよいことはいうまでもない。
【００６５】
次に、実施形態６の第３の特徴である案内部材６０ｃのフランジ部６３ａに穿設される孔（実施形態５では、通孔６４’）を、円周方向に傾斜させて穿設した斜孔６４ｂ’とした点である。即ち、図１６及び図１７に示すように、案内部材６０ｂの下部に形成されている円盤状のフランジ部６３ａには、複数個の、例えば６個の斜孔６４ｂ’が形成される。
【００６６】
また、この斜孔６４ｂ’は、フランジ部６３ａの円周方向に且つ斜めに穿設されていることから、冷媒はその下部に位置する多孔質部材５３’内を長い流路で多孔質部材５３’と接触することになるから、その保持する運動エネルギがより多く消耗され、冷媒中の気泡が細分化され消音効果を一層向上させることができる。
【００６７】
なお、上記実施形態６の特徴を説明したが、これらの特徴は、各々他の発明或いは他の実施形態に個別に適用でき、それぞれの作用・効果を発揮することは言うまでもない。
【００６８】
【発明の効果】
本発明によれば、冷媒中の気泡を細分化する部材、及び、細分化された状態の気泡を保持させる小気泡保持流路Ｄを弁体に設けることにより、冷媒の流動音を低減し、騒音を抑制することができる電磁弁を実現できる。また、上記構成に加えて、小気泡保持流路Ｄの下流側にも冷媒中の気泡を細分化する部材を配置することで、上記冷媒の気泡を細分化することが促進され、騒音の抑制効果が一層促進される。
また、冷媒と冷凍機油とにより所謂スラッジが生成され、これがコンタミネーションとして上記部材に付着した場合でも流路を塞ぎ、流量不足が生じることがない。
【図面の簡単な説明】
【図１】実施形態１に係る電磁弁の開状態の縦断面図。
【図２】図１のＡ部の拡大図。
【図３】実施形態１に係る電磁弁の閉状態の縦断面図。
【図４】実施形態２に係る電磁弁の開状態の縦断面図。
【図５】図４のＢ部の拡大図。
【図６】実施形態２に係る電磁弁の閉状態の縦断面図。
【図７】実施形態３に係る電磁弁の開状態の縦断面図。
【図８】図７のＣ部の拡大図。
【図９】実施形態４に係る電磁弁の要部拡大図。
【図１０】実施形態４に係る電磁弁の閉状態の縦断面図。
【図１１】実施形態５に係る電磁弁の開状態の縦断面図。
【図１２】実施形態５に係る電磁弁の要部拡大図。
【図１３】実施形態６に係る電磁弁の開状態の縦断面図。
【図１４】図１３の要部拡大図。
【図１５】図１４のＢ−Ｂ線断面図。
【図１６】電磁弁のフランジ部の平面図。
【図１７】図１６のＡ−Ａ線断面図。
【図１８】図１４のＢ−Ｂ線断面の別例図。
【符号の説明】
Ｄ・・（細分化気泡の状態の）小気泡保持流路
１・・弁本体１ａ・・周壁１ｂ・・パイプ嵌合孔２・・電磁コイル
３・・吸引子３ａ・・係止部３ｂ・・パイプ部
３ｃ・・段部３ｄ・・係止凹部４・・弁体５・・プランジャ
５ａ・・固定用孔５ｂ・・均圧孔６・・弁シート６ａ・・弁座部
６ｂ・・パイプ嵌合部６ｃ・・フランジ７・・コイルスプリング
８・・コイルケース９・・押圧係止部材１０・・弁室１１・・上部弁室
４０，４０’，４０”，４０ａ，４０ｂ，４０ｃ・・弁部４１・・肩部
４２，４２’，４２”・・側壁部
４３ａ・・空間部４３ｂ・・径大孔（通路）４３ｃ・・径小孔（通路）
４３ｄ・・支持孔４３ｅ・・抜孔４３ｆ，４３ｇ・・隙間
４４，４４’，４４”・・ブリード孔４４ａ・・入口側径大部
４４ｂ・・出口側径大部４４ｃ・・径大部４４ｄ・・径大部
４４ｅ・・径大部（実施形態６）４５・・先端４６・・小径部
４７，４７’，４７”・・案内環部材４７ａ・・入口側傾斜部
４７ｂ・・均一径部４７ｃ・・出口側傾斜部４７ｄ・・出口側径大部
４７ｅ・・径大隙間部４７ｆ・・入口側径大部
４８・・保持突部（カシメ部）
５１，５１ａ，５１ｂ，５２，５３，５３’，５４，５４ａ，５４ｂ・・
多孔質部材６０，６０’，６０”・・案内部材
６０ａ・・案内部材（実施形態４）６０ｂ・・案内部材（実施形態５）
６０ｃ・・案内部材（実施形態６）６１，６１” ，６１ａ・・柱状部
６２，６２’・・傾斜部６３，６３’，６３ａ・・フランジ部
６４，６４’・・通孔６４ａ・・出口側径大部６４ｂ，６４ｂ’・・斜孔
８０・・上壁８１・・下壁８２・・貫通孔
８３・・貫通孔８４・・垂直壁９０・・本体
９２・・垂下部９４・・入口側立上り部９５・・突起
１００・・入口側パイプ１１０・・出口側パイプ１２０・・ボビン
１４０・・リード線１５０・・リベット[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a solenoid valve used for an air conditioner or the like.
[0002]
[Prior art]
Conventionally, a solenoid coil is provided around a plunger tube provided in a valve body, and a movable suction element is provided on the valve body side and a plunger is provided on the other side in the plunger tube, and is biased by a valve-opening spring between the movable suction element and the plunger. There is known an energized closed solenoid valve in which a plunger and a valve body are connected and housed by caulking in a state.
[0003]
When such a conventional electromagnetic valve is used in an air conditioner that performs a dehumidifying operation in a refrigeration cycle, a hole is provided in a valve body as a throttle for the dehumidifying operation. However, in the case where a hole is provided in the valve body, there is a case where refrigerant flow noise is generated due to the throttling action, and when it is generated, there is a problem that noise occurs.
[0004]
Therefore, a technique for reducing this noise is disclosed in Patent Document 1 below. This patent document 1 discloses that as a throttle device used as a dehumidifying throttle valve in an air conditioner having a dehumidifying mode, it is possible to reduce refrigerant passage noise in a throttle passage and obtain dehumidifying operation performance even in long-term use. A possible aperture device is shown. However, at present, this device does not provide the expected effect of reducing the refrigerant passage noise.
[0005]
[Patent Document 1] JP-A-2002-310540
[0006]
[Problems to be solved by the invention]
In view of the above, the present inventors have developed a technique for the purpose of further reducing the refrigerant passage noise while considering the above-described conventional technique.The present invention integrates a member for dividing air bubbles into a valve body. It is an object of the present invention to provide an electromagnetic valve in which the flow of the refrigerant is further reduced and the generation of the noise is suppressed while preventing the fragmented air bubbles from growing large again while being assembled. Another object of the present invention is to provide an electromagnetic valve capable of reducing the flow velocity of the refrigerant by colliding the fragmented air bubbles with a passage wall surface such as a valve seat, and further reducing the refrigerant flow noise.
Furthermore, when a so-called sludge is generated by the refrigerant and the refrigerating machine oil and adheres to the above-mentioned member as a contamination, a flow path is blocked, and a problem of insufficient flow rate may occur. It is an object of the present invention to provide a solenoid valve capable of preventing a malfunction.
[0007]
[Means for Solving the Problems]
To achieve the above object, the solenoid valve according to the present invention employs the following measures. That is,
The solenoid valve according to claim 1 is a solenoid valve that opens and closes the valve by moving a valve body toward and away from a valve seat by an electromagnetic coil. A communication passage is provided, and a first member for dividing air bubbles on the refrigerant inflow side of the valve body is held by the valve body, and a refrigerant outflow side of the passage is provided with a divided air bubble. A flow path for maintaining the state is formed.
[0008]
According to a second aspect of the present invention, there is provided the electromagnetic valve according to the first aspect, wherein a second member for dividing air bubbles is disposed in the passage in the valve body.
According to a third aspect of the present invention, there is provided an electromagnetic valve which opens and closes a valve by moving a valve body toward and away from a valve seat by an electromagnetic coil. A communication path is provided, a first member for dividing air bubbles is provided in the passage, and a flow path for holding the state of the divided air bubbles is formed on the refrigerant outflow side of the passage. In addition, a second member for dividing air bubbles is disposed downstream of the flow path.
According to a fourth aspect of the present invention, in the solenoid valve according to any one of the first to third aspects, the flow path for maintaining the state of the fragmented air bubbles includes an inducer section, an orifice section, and a diffuser section. It is characterized by comprising a small bubble holding channel formed as a continuous space.
[0009]
According to a fifth aspect of the present invention, in the solenoid valve according to the fourth aspect, the small bubble holding flow path includes a guide ring member and a guide member disposed in the flow path, and an inner periphery of the guide ring member. , A funnel-shaped inlet-side inclined portion that becomes narrower downward, a uniform-diameter portion with a uniform inner diameter, and an inverted funnel-shaped outlet-side inclined portion that becomes wider downward are continuously formed, and the guide member has Is formed with a columnar portion to be inserted into the inner peripheral portion of the guide ring member, the inducer portion is formed between the inlet-side inclined portion and the columnar portion, and the orifice portion has a uniform diameter portion and the columnar portion. The diffuser portion is formed between the outlet-side inclined portion and the columnar portion, and the diffuser portion is a continuous space.
The solenoid valve according to claim 6 is the solenoid valve according to any one of claims 1 to 5, wherein the first and second members are made of a foam metal, a porous plastic, a mesh formed by knitting a metal thread, In addition, it is characterized by being made of a metal plate having a plurality of holes.
[0010]
The solenoid valve according to claim 7 has a valve chamber, a valve body having a pipe part closed at one end, an electromagnetic coil provided on an outer periphery of the pipe part of the valve body, and a valve body having a pipe part. A fixed suction element, a rod-shaped valve element slidably provided in the suction element in the longitudinal direction of the pipe portion of the valve body, a plunger connected to the valve element, and a valve seat provided at an open end of the valve body. A valve member provided between the suction element and the plunger; and a valve opening urging means for urging a valve body in a valve opening direction opposite to the valve seat sheet member. In a solenoid valve that opens and closes a valve by forming a valve seat that faces and separates a valve body facing the inside of a valve chamber of a valve body on a member and moves the valve body toward and away from a valve seat by the electromagnetic coil. The valve body is provided with a hole and a passage communicating with the hole on the refrigerant inflow side of the valve body. A member for dividing air bubbles into the refrigerant inlet side or the refrigerant outlet side of the valve element and the passage, and a small bubble holding flow for maintaining the state of the divided bubbles in the passage. A road is formed.
The solenoid valve according to claim 8 is the solenoid valve according to any one of claims 1 to 7, wherein the outflow direction of the refrigerant from the outlet of the passage in the valve body is such that the valve seat contacts the valve body. Characterized by being formed so as to intersect with the inner wall surface.
According to the solenoid valve of the present invention, the air bubbles in the refrigerant can be subdivided by the member that subdivides the air bubbles, and the flow path for maintaining the state of the subdivided air bubbles is formed. And an electromagnetic valve capable of preventing generation of noise can be realized. In addition, by lowering the flow velocity of the refrigerant while maintaining the state of the fragmented bubbles, the refrigerant flow noise is further suppressed.
[0011]
According to a ninth aspect of the present invention, in the solenoid valve according to any one of the third to eighth aspects, the width of the second member is larger than the width of the first member. I do.
According to this feature, so-called sludge is generated by the refrigerant and the refrigerating machine oil, and when this becomes a contamination, the contamination adheres to the surface of the second member to block the flow path, resulting in insufficient flow rate. Although a fear may occur, by increasing the volume or surface area of the second member with respect to the first member, in addition to reducing the kinetic energy of the refrigerant, even if the contamination is temporarily attached, sufficient Flow rate can be secured.
[0012]
According to a tenth aspect of the present invention, in the solenoid valve according to any one of the first to ninth aspects, the refrigerant inflow direction is eccentric with respect to the first member from a center position thereof. .
An electromagnetic valve according to an eleventh aspect is the electromagnetic valve according to any one of the third to tenth aspects, wherein the inflow position is set at the center of the second member when the refrigerant flows into the second member. It is characterized by being eccentric from the position and inclining its inflow direction.
According to the feature of the ninth, tenth, or eleventh aspect of the present invention, the refrigerant passes through the first member and the second member for dividing the air bubbles over a longer distance. Thus, the flow noise of the refrigerant is further reduced, and the generation of noise is further suppressed.
[0013]
Embodiment 1
First, a first embodiment will be described with reference to FIGS. 1 is a longitudinal sectional view of the solenoid valve in an open state, FIG. 2 is an enlarged view of a portion A in FIG. 1, and FIG. 3 is a longitudinal sectional view of a closed state. In the following description, upper, lower, left, and right expressions are used in relation to the drawings, but the actual positional relationship is not limited to this.
[0014]
As shown in FIG. 1, the solenoid valve of the present invention has a valve chamber 10 inside a valve body 1, and has one end closed at an upper portion of the valve body 1 via a locking portion 3 a of a suction element 3. A pipe portion 3b is mounted, and an electromagnetic coil 2 is provided on the outer periphery of the pipe portion 3b. Inside the pipe portion 3b, a rod-like member is provided so as to be slidable with respect to the suction element 3 in the longitudinal direction of the pipe portion 3b. Is provided. Further, this solenoid valve is provided in the pipe portion 3b between the plunger 5 connected to the valve body 4, the valve seat 6 provided at the lower opening end of the valve body 1, and the suction element 3 and the plunger 5. And a coil spring 7 provided. The coil spring 7 is a valve-opening biasing unit that biases the valve body 4 in a valve opening direction opposite to the valve seat 6.
[0015]
As shown in FIG. 1, the valve seat 6 is formed with a valve seat 6 a which faces the inside of the valve chamber 10 of the valve body 1 and which comes into contact with and separates from the valve body 4. The valve seat 6 is welded and fixed to the valve body 1. Have been. The valve body 1 and the valve sheet 6 are made of stainless steel, and the valve body 1 and the valve sheet 6 are formed by press working.
[0016]
As shown in FIG. 1, a coil case 8 for housing the electromagnetic coil 2 is provided on the outer periphery of the pipe portion 3b, and a pressing and locking member 9 fixed to the coil case 8 is attached to the pipe portion 3b of the valve body 1. The coil case 8 is fixed to the pipe portion 3b of the valve body 1 via the pressing and locking member 9 by being locked to the formed locking recess 3d.
[0017]
As shown in FIG. 1, a valve chamber 10 is formed inside a cylindrical peripheral wall 1a of the valve body 1, and a pipe fitting hole 1b is formed in the peripheral wall 1a of the valve body 1 in a direction orthogonal to a vertical central axis. Are provided, and the inlet side pipe 100 is connected and welded.
A valve seat 6 is attached to the lower end of the peripheral wall 1a of the valve body 1. The valve seat 6 includes a pipe-shaped valve seat portion 6a, a pipe fitting portion 6b formed below the valve seat portion 6a, and a flange 6c formed on an outer peripheral portion of the pipe fitting portion 6b. The peripheral wall 1a is welded to the outer peripheral portion of the flange 6c.
[0018]
A suction element 3 is mounted on the upper end of the peripheral wall 1a of the valve body 1. The suction element 3 has a step 3c formed at a lower portion thereof, and an upper end of the peripheral wall 1a of the valve body 1 is mounted below the step 3c. A lower portion of the pipe portion 3b is mounted in a locking recess 3d formed on the outer periphery of the upper portion of the suction element 3. The upper end of the pipe portion 3b is closed.
[0019]
An outlet-side pipe 110 is connected and welded to a pipe fitting portion 6b formed below the valve seat 6. As shown in FIG. 1, a cylindrical suction element 3 is disposed above the valve chamber 10 at the upper part of the valve body 1, and a locking recess 3 d is formed on the outer peripheral surface of the suction element 3. A pipe portion 3b is fixed to the upper outer peripheral portion of the suction element 3 by caulking. Further, a concave portion communicating with the lower valve chamber 10 is formed in a lower portion of the suction element 3 to constitute an upper valve chamber 11.
[0020]
As shown in FIG. 1, the suction element 3 is provided with a rod-shaped valve element 4 made of, for example, brass penetrating therethrough so as to be slidable along the longitudinal direction of the pipe portion 3 b. The valve 40 has a valve portion 40 that is separated from and in contact with the valve seat 6 a of the valve seat 6, and a small diameter portion 46 is formed at the upper end of the valve body 4. The small diameter portion 46 is fitted and fixed in the fixing hole 5a at the lower part of the plunger 5.
[0021]
The valve portion 40 is formed to be larger in diameter than the valve stem portion above it, has a shoulder portion 41 serving as a step portion, and has a cylindrical side wall portion 42 formed therethrough. A space 43a is formed inside the part 42.
[0022]
2, a large-diameter hole 43b communicating with the space 43a and a small-diameter hole 43c communicating with the large-diameter hole 43b are formed at the center of the valve portion 40. The hole communicating with the hole 43c and having a small cross-sectional area, that is, the bleed hole 44 is formed in the lateral direction (therefore, in the direction perpendicular to the axial direction of the small-diameter hole 43c). The bleed hole 44 has an inlet-side large-diameter portion 44a formed at both ends, and opens to the upper valve chamber 11 through the inlet-side large-diameter portion 44a (the valve-open state in FIG. 1). However, in the valve closed state shown in FIG.
[0023]
A first porous member 51 is held as a member for dividing air bubbles in the refrigerant by facing the opening of the bleed hole 44 above the shoulder 41 of the valve portion 40. The first porous member 51 is placed on the upper part of the shoulder 41 and is supported by the holding projection 48. That is, the first porous member 51 is formed in an annular shape having a predetermined thickness, and the inner peripheral portion of the upper surface of the annular portion is caulked and fixed by the holding projection 48 of the valve portion 40 to thereby form the valve portion. It is fixed and held at 40.
[0024]
Further, a second porous member 52 is inserted into the small diameter hole 43c and the large diameter hole 43b of the valve portion 40. The second porous member 52 is formed in a cylindrical shape having a different diameter and an inverted T-shape in vertical section. The large diameter portion is disposed in the large diameter hole 43b, and the small diameter portion is disposed in the small diameter hole 43c. Is done. The porous member 52 is supported from below by a columnar portion 61 of a guide member 60 described below. A gap having a large vertical width (a large inlet side diameter portion 44 a) is formed between the porous member 51 and the bleed hole 44, and a vertical gap is formed between the porous member 52 and the bleed hole 44. Since the wide gap 43f is formed, the flow path range of the refrigerant in the porous members 51 and 52 is widened, and finer bubbles are promoted.
[0025]
For example, foamed metal is used for each of the porous members 51 and 52. In addition, a porous plastic may be used, and a wire mesh member (for example, trade name “Akyume Mesh” manufactured by Toa Iron Net Co., Ltd.) formed by knitting a metal thread such as stainless steel or brass and forming the mesh to a predetermined thickness. May be used. Further, a metal plate having a predetermined thickness formed with a predetermined number of through holes may be used. The materials of these porous members are the same in Embodiments 2 to 4 described later.
[0026]
Further, in the large-diameter hole 43b and the space 43a of the valve portion 40, a small bubble holding flow path D for holding the state of the fragmented bubbles is formed by the guide ring member 47 and the guide member 60.
[0027]
The guide ring member 47 is formed of an annular member having a predetermined thickness, and has a funnel-shaped inlet-side inclined portion 47a whose inner surface becomes narrower downward, a uniform-diameter portion 47b having a uniform inner diameter continuous with the inlet-side inclined portion 47a, and a lower portion. An inverted funnel-shaped outlet-side inclined portion 47c that expands in the direction is formed sequentially from above to below. Further, as shown in FIG. 1, the guide ring member 47 is caulked and fixed at the distal end 45 of the valve body 4.
[0028]
The guide member 60 includes a disk-shaped flange portion 63, a columnar portion 61 erected at an axial position of the flange portion 63, and an inclined portion 62. As shown in FIG. 2, a plurality of through holes 64 are formed in the flange portion 63, and the refrigerant in the valve portion 40 flows out of the through holes 64 directly to the outlet pipe 110.
The columnar portion 61 arranged on the guide member 60 has a hemispherical cylindrical body on the upper surface, and has a slightly smaller diameter to form a gap (orifice) with the inner surface of the uniform diameter portion 47b. I have. In addition, the inclined portion 62 that is continuous with the columnar portion 61 has a larger diameter toward the lower side.
Therefore, between the guide ring member 47 and the guide member 60, an inducer portion (between the funnel-shaped inlet-side inclined portion 47a and the columnar portion 61, which narrows downward, and an orifice portion having a uniform flow passage area (the uniform orifice portion). A continuous space is formed between the uniform inner diameter portion 47b and the columnar portion 61) and the diffuser portion (between the inverted funnel-shaped outlet-side inclined portion 47c and the columnar portion 61 that expands toward the lower side). Become. The energy of the refrigerant flowing between them is relatively slowly converted into velocity energy, and does not undergo rapid contraction / expansion. Therefore, even when the refrigerant contains bubbles, No rapid growth (expansion) occurs. Therefore, even if there are finely divided air bubbles in the refrigerant, they do not grow large. Therefore, these parts are referred to as “small air bubble holding flow paths D” in the present invention.
[0029]
As shown in FIG. 1, a cylindrical plunger 5 is movably disposed inside the pipe portion 3b of the valve body 1 near the upper end thereof. A fixing hole 5a for fixing the small diameter portion 46 of the valve body 4 is provided along the hole. Reference numeral 5b denotes a pressure equalizing hole.
[0030]
As shown in FIG. 1, the small diameter portion 46 of the valve body 4 is fitted into the fixing hole 5a from below, and the tip of the small diameter portion 46 of the valve body 4 is subjected to caulking, so that the plunger 5 is moved. It is connected to the small diameter portion 46 of the body 4.
[0031]
As shown in FIG. 1, a coil spring 7 for opening a valve is provided between the suction element 3 and the plunger 5 outside the valve element 4, and the plunger 5 is moved by the urging force of the coil spring 7. It is always urged in a direction away from the third.
[0032]
As shown in FIG. 1, the valve seat 6 is formed in a cylindrical shape on the same central axis as the valve body 1, and a valve seat 6 a is formed at an upper end thereof close to the central axis of the inlet pipe 100. A pipe fitting portion 6b is formed at the lower end of the sheet 6 via a step, and a flange 6c that protrudes outward is formed at an end edge of the pipe fitting portion 6b.
[0033]
As shown in FIG. 1, a valve seat 6 a of the valve seat 6 is disposed in the valve chamber 10 of the valve body 1 so as to face the valve portion 40, and a flange 6 c of the valve seat 6 is provided at a lower edge of the valve body 1. , And both parts are subjected to arc welding, for example, TIG welding.
[0034]
As shown in FIG. 1, an outlet pipe 110 is connected to the valve seat 6, and one end of the outlet pipe 110 is fitted into the pipe fitting portion 6 b of the valve seat 6 from below, and copper brazing in a hydrogen furnace is performed. It is welded by atmosphere brazing such as attaching means.
[0035]
At first, the valve seat 6 is assembled to the valve body 1 such that the center axis of the valve seat 6 coincides with the center axis of the peripheral wall 1a of the valve body 1, and the valve seat 6a of the valve seat 6 is placed in the valve body. The valve seat 6 is inserted into the inside of the valve chamber 10 from below, and the flange 6c of the valve seat 6 is brought into contact with the lower edge of the valve body 1 and is welded and assembled by TIG welding means.
[0036]
As shown in FIG. 1, a bobbin 120 is fitted and mounted on the outside of the pipe portion 3b, and the electromagnetic coil 2 is wound around the bobbin 120, and the bobbin 120 is housed inside the coil case 8. I have. As shown in FIG. 1, a lead wire 140 is connected to the bobbin 120, and power is supplied to the electromagnetic coil 2 via the lead wire 140.
[0037]
Further, a through hole 82 and a through hole 83 are provided on the horizontal upper wall 80 and the lower wall 81 of the coil case 8 facing each other along the same vertical central axis, and the pipe portion 3b is inserted therethrough.
[0038]
As shown in FIG. 1, a pressing and locking member 9 made of sheet metal is disposed on an upper portion of the upper wall 80 of the coil case 8, and the pressing and locking member 9 has a flat main body 90. At one end thereof, a hanging portion 92 bent downward at right angles is formed, and at the other end of the main body 90 of the pressing and locking member 9, a rising portion 94 bent at right angles upward is formed. The rising portion 94 is formed with a projection 95 that engages with the locking recess of the pipe portion 3b of the valve body 1.
[0039]
As shown in FIG. 1, a main body 90 of the pressing and locking member 9 is placed on the upper wall 80 of the coil case 8, and is fixed to the coil case 8 via rivets 150.
[0040]
Next, the operation of the first embodiment of the present invention will be described.
First, the dehumidifying operation will be described. In this solenoid valve, when the electromagnetic coil 2 is energized, a magnetic force is generated in the attracting element 3 by energizing the electromagnetic coil 2, the attracting element 3 attracts the plunger 5 downward, and the plunger 5 is connected to the pipe portion of the valve body 1. At the same time, the valve body 4 moves downward in the interior of the valve seat 3b against the urging force of the coil spring 7 by the suction of the suction element 3, and at the same time, the valve body 4 is guided by the suction element 3 and the plunger 5 and the valve seat 6a of the valve seat 6 together. 3, the valve portion 40 of the valve body 4 comes into close contact with the valve seat 6a of the valve seat 6, and the solenoid valve is closed.
[0041]
In such a closed state, the inlet pipe 100 and the outlet pipe 110 are connected to the valve chamber 10, the upper valve chamber 11, the inlet-side large-diameter portion 44a, the bleed hole 44, the small-diameter hole 43c, the large-diameter hole 43b, and It communicates through the space 43a. Therefore, during the dehumidifying operation of the predetermined refrigeration cycle, when the refrigerant flows from the inlet pipe 100, the bleed hole 44 is provided in the valve body 4, so that the refrigerant subjected to the throttling action is dispersed, and the flow rate and the movement of the refrigerant are reduced. The energy is reduced, and the flow noise of the refrigerant is reduced. In addition, even if bubbles are generated in the refrigerant flowing out of the small-diameter hole 43c to the outlet pipe 110 due to the restricting action, the refrigerant is used as the first porous member 51 and the second porous member 52 as members for dividing the bubbles. When passing through, the air bubbles in the refrigerant are fragmented, and the flow noise of the refrigerant due to the air bubbles is reduced.
Further, in the present invention, the small bubble holding flow path D is provided to allow the refrigerant after the fragmentation to pass, so that the fragmented bubbles flow into the outlet pipe 110 without the bubbles growing again and becoming large. Then, cooling and dehumidification are performed in the refrigeration cycle.
[0042]
Further, when the power supply to the electromagnetic coil 2 is cut off, no magnetic force is generated in the attraction element 3, the attraction element 3 loses the attraction force, and the plunger 5 applies the urging force of the coil spring 7 to the inside of the pipe portion 3 b of the valve body 1. As a result, the valve body 4 moves upward together with the plunger 5 while being guided by the suction element 3, and the valve portion 40 moves as shown in FIGS. The fluid is separated from the valve seat 6a of the valve seat 6, the fluid flows from the inlet pipe 100 through the valve chamber 10 and the inside of the valve seat 6 to the outlet pipe 110, and the solenoid valve performs an opening operation.
The description will be added by adding reference numerals. The formation of the large gap increases the flow channel area. The durability can be improved by expanding the flow path range.
[0043]
Embodiment 2
Next, a second embodiment will be described.
4 is a longitudinal sectional view of the solenoid valve according to the second embodiment in an open state, FIG. 5 is an enlarged view of a portion B in FIG. 4, and FIG. 6 is a longitudinal sectional view of the solenoid valve in a closed state.
The second embodiment shown in FIGS. 4 to 6 is different from the first embodiment shown in FIGS. 1 to 3 in that the first porous member 51 is replaced with a porous member downstream of the columnar portion 61 in the small bubble holding channel D. The case where the cooling medium is provided on the member 53 is shown. In this case as well, the refrigerant flow noise can be reduced.
[0044]
Therefore, in the second embodiment, the position at which the porous member is provided is different from that of the first embodiment, and the other configuration is the same. Therefore, the same parts as those in FIG.
In the second embodiment, as shown in FIG. 5 in particular, a porous member 53 is formed in a ring shape on the outer peripheral portion of the inclined portion 62 'of the guide member 60' in the space 43a as a member for dividing air bubbles. Is placed. The porous member 53 is placed above the flange portion 63 'of the guide member 60, and is pressed into the valve body 4 in a state of crossing the space 43a. Further, the upper surface of the flange portion 63 ′ is formed in a two-step plane to support the porous member 53.
[0045]
In this solenoid valve, as in the first embodiment, when the electromagnetic coil 2 is energized, the solenoid valve is closed as shown in FIG. In such a closed state, the inlet-side pipe 100 and the outlet-side pipe 110 communicate with each other through the valve chamber 10, the upper valve chamber 11, the bleed hole 44, the small-diameter hole 43c, the large-diameter hole 43b, and the space 43a. .
Therefore, during the dehumidifying operation of the predetermined refrigeration cycle, when the refrigerant flows from the inlet side pipe 100, large bubbles in the refrigerant are fragmented when passing through the first porous member 52, and in the fragmented state. The bubbles flow into the small bubble holding flow path D, further pass through the second porous member 53, and flow out to the outlet pipe 110 through the through holes 64 while the bubbles are fragmented.
[0046]
That is, the refrigerant is dispersed by the bleed holes 44 and the like in the valve portion 40, and the bubbles in the refrigerant are fragmented, so that the flow noise of the refrigerant is reduced and flows into the space 43a. In the space 43a, the air bubbles are further subdivided when passing through the porous member 53 and flow into the outlet pipe 110, so that the refrigerant flow noise due to the air bubbles is reduced, and the cooling / dehumidifying action in the refrigeration cycle is performed. Can be performed.
[0047]
In the second embodiment, it is a matter of course that a foamed metal, a porous plastic, an accumulation mesh, or the like can be used as the porous member 53 as in the first embodiment. Further, a metal plate having a predetermined number of through holes formed in a metal plate such as brass or stainless steel can be used.
[0048]
Embodiment 3
Next, a third embodiment will be described. FIG. 7 is a longitudinal sectional view of the solenoid valve according to the third embodiment in an open state, and FIG. 8 is an enlarged view of a portion C in FIG. In the description of the third embodiment, the same components as those in the first embodiment illustrated in FIGS. 1 to 3 and the second embodiment illustrated in FIGS. 4 to 6 are denoted by the same reference numerals in FIGS. 7 and 8. Description is omitted.
[0049]
The third embodiment shown in FIGS. 7 and 8 differs from the second embodiment shown in FIGS. 4 to 6 in the following points. That is, the columnar portion 61 "of the guide member 60" is formed as a columnar member having a uniform diameter, and the upper end thereof is engaged with a support hole 43d formed further above the small diameter portion 43c of the valve body 4 by press fitting. The support hole 43d is formed with a coolant vent 43e as required. An annular porous member 54 is fitted in the small diameter portion 43c. A gap 43g is formed between the porous member 54 and the columnar portion 61 in order to improve the fluidity of the refrigerant.
[0050]
The guide ring member 47 ', which is arranged to support the porous member 54 from below, is formed vertically long from the vicinity near the bleed hole 44 to the upper surface of the flange 63'. As a result, the small bubble holding flow path D Are formed vertically long, and a third porous member 53 is held at a lower portion of the guide ring member 47 'via a large-diameter outlet-side portion 47d. Further, a large-diameter gap portion 64a is formed between the third porous member 53 and the flange portion 63 '.
[0051]
In the third embodiment, as shown in FIG. 8 in particular, three porous members 51, 53, and 54 are provided as members for dividing air bubbles, and the flow path of each of the porous members 51, 53, and 54 is reduced. By forming the large-diameter portions 44a and 44b, the gap 43g, and the large-diameter portions 47d and 64a before and after, the flow path in each of the porous members 51, 53, and 54 is expanded, and the fragmentation of the foam is further ensured. Thus, the refrigerant flow noise can be further reduced.
[0052]
The guide ring member 47 'is formed vertically long from the vicinity below the bleed hole 44 to the upper surface of the flange 63', and the small bubble holding flow path D is formed vertically long, so that the inducer portion and the orifice portion are formed. Further, since the diffuser portion is formed as a continuous space longer, there is an effect that the change in the cross-sectional area of the flow path becomes slow and the growth of bubbles is small.
[0053]
Further, the guide member 60 ″, the guide ring member 47 ′, and the porous members 33 and 54 that constitute the solenoid valve according to the third embodiment are coaxially arranged with the columnar portion 61 ″ as an axis. There is also an ancillary effect of good integration and functional stability.
[0054]
Embodiment 4
Next, a fourth embodiment will be described. 9 is an enlarged view of a main part of the solenoid valve according to the fourth embodiment, and FIG. 10 is a longitudinal sectional view of the solenoid valve according to the fourth embodiment in a closed state.
In the fourth embodiment, as shown in FIG. 9, the through holes 64 of the third embodiment shown in FIGS. 7 and 8 are formed by being inclined and formed as oblique holes 64b so that the outflow direction of the refrigerant is enlarged. . Except for this point, the third embodiment is the same as the third embodiment, and the other components are denoted by the same reference numerals as those shown in FIGS. 7 and 8 in FIGS.
[0055]
According to the fourth embodiment, the refrigerant flowing out of the oblique hole 64b collides against the inner side wall of the valve seat 6a to reduce the kinetic energy of the refrigerant and further reduce noise. Needless to say, such an oblique hole 64b can be applied to the first and second embodiments.
[0056]
Embodiment 5
Further, a fifth embodiment will be described. FIG. 11 is a longitudinal sectional view of the solenoid valve according to the fifth embodiment in an open state, and FIG. 12 is an enlarged view of a portion E in FIG.
The fifth embodiment is characterized in that the position where the through hole 64 shown in the third embodiment is formed is arranged on the upstream side of the porous member 53 ′. That is, in the fifth embodiment, the large-diameter gap portion 47e formed at the lower portion of the guide ring member 47 ', that is, the downstream side, and the diameter formed at the disc-shaped flange portion 63' provided at the lower portion of the guide member 60b. A plurality of, for example, six through holes 64 ′ communicating with the large gap portion 64 a are provided.
[0057]
Further, a through hole 64 'is provided downstream of the large-diameter gap portion 47e, and a porous member 53' is provided downstream of the large-diameter gap portion 64a. The porous member 53 'is provided in the side wall portion 42'. At the same time, the refrigerant is fixed by caulking at the end of the valve portion 40b, and the refrigerant flowing through the through hole 64 'passes through the porous member 53' and flows out to the outlet side passage 110.
[0058]
In the fifth embodiment, the porous member 54a is provided on the upstream side of the columnar portion 61a of the guide member 60b, and the refrigerant that has passed through the porous member 51a is formed by the large-diameter portion 44c provided on the side wall 42 '. Through the bleed hole 44 ', and flows into the porous member 54a through the space formed by the large-diameter portion 44d provided in the side wall portion 42'. The bleed holes 44 'are formed vertically. Then, the refrigerant that has passed through the porous member 54a passes through a space formed by the upper portion of the guide ring member 47 ', that is, the inlet-side large-diameter portion 47f formed on the upstream side, and the columnar portion of the guide ring portion 47' and the guide member 60b. 61a and flows into the small bubble holding flow path D formed by the flow path D.
[0059]
According to the fifth embodiment having such a configuration, the porous members 51a, 54a, and 53 'are provided at three locations as members for subdividing bubbles in the refrigerant, and the flow of the porous members 51a, 54a, and 53' is performed. By forming the large-diameter portions 44c and 44d and the large-diameter portions 47f and 47e before and after the road, the flow path in each of the porous members 51a, 54a and 53 'is expanded, and the fragmentation of the bubbles is further ensured. Thus, the refrigerant flow noise can be further reduced. Moreover, by disposing the through-hole 64 ′ on the upstream side of the porous member 53 ′, even when a refrigerant flow noise occurs when the refrigerant passes through the through-hole 64 ′, the porous member 53 ′ can be removed. It can be reduced by passing.
[0060]
In FIGS. 11 and 12, the same parts as those in FIGS. 7 and 8 are denoted by the same reference numerals, and description thereof is omitted.
[0061]
Embodiment 6
Further, a sixth embodiment will be described with reference to the drawings. 13 is a longitudinal sectional view of the solenoid valve according to the sixth embodiment in an open state, FIG. 14 is an enlarged view of a main part of the solenoid valve, FIG. 15 is a sectional view taken along line BB of FIG. 14, and FIG. FIG. 17 is a sectional view taken along line AA of FIG. 16, and FIG. 18 is another example of a sectional view taken along line BB of FIG. In the description of the sixth embodiment, the same components as those in the other embodiments 1 to 5 are denoted by the same reference numerals in FIGS. 13 to 18 as those in FIGS. 1 to 12. The description of the other components is omitted by appending a symbol.
[0062]
The feature of the sixth embodiment is that the width of the porous member 53 'constituting the second member is larger than the width of the porous member 54b constituting the first member, as compared with the solenoid valve of the fifth embodiment. That is, the opening direction of the bleed hole 44 ″ is formed in a direction other than the direction of the center of the porous member 54 b, and the oblique hole 64 b ′ formed in the flange 63 a of the guide member 60 c is formed circumferentially. It is in the point that it was pierced by inclining in the direction.
[0063]
First, the width of the porous member 53 ′, which is the first feature of the sixth embodiment, will be described. As shown in FIG. 14, mainly the volume of the porous member 54b that subdivides the bubbles in the refrigerant is mainly determined. The point is that the volume of the porous member 53 'that suppresses or reduces the generation of noise is increased. Therefore, the width of the porous member 53 'is increased with respect to the width of the porous member 54b, and the sixth embodiment is a second member due to such a first feature. By expanding the flow passage of the refrigerant in the porous member 53 'to reduce the kinetic energy of the refrigerant, the noise reduction effect can be further improved.
In addition, when so-called sludge is generated by the refrigerant and the refrigerating machine oil and becomes a contamination, the contamination may adhere to the surface of the second member, block the flow path, and cause a flow rate shortage. Although a fear arises, in the present embodiment, in addition to reducing the kinetic energy of the refrigerant by enlarging the surface area of the second member with respect to the first member, even if contamination adheres, sufficient The flow rate can be secured.
[0064]
Next, the second feature of the sixth embodiment will be described. As shown in FIG. 15, the hole axis direction of a bleed hole 44 ″ formed in the valve portion 40c as a coolant inflow hole with respect to the porous member 54b. Is formed not in the center of the porous member 54b but in a direction other than the center of the porous member 54b. Is formed in a direction deviating from the center of the porous member 54b. The figure shows a case where a plurality of bleed holes 44 ", for example, two bleed holes 44" are formed.
With such a configuration, the refrigerant that has flowed into the porous member 54b from the bleed hole 44 ″ can increase the contact area and time with the porous member 54b when passing through the porous member 54b, and the noise reduction function can be achieved. The technical idea is to form the bleed hole 44 ″ in the tangential direction of the outer peripheral surface of the porous member 54b, as shown in FIG. As shown in FIG. 18B, this can be realized by forming a plurality of bleed holes 44 ".
It should be noted that the second feature of the sixth embodiment is omitted, and the flow path of the bleed hole 44 ″ is formed in a direction toward the center of the porous member 54b. It goes without saying that the volume and the surface area may be increased only from those of the porous member 54b.
[0065]
Next, a hole (through hole 64 'in the fifth embodiment) formed in the flange portion 63a of the guide member 60c, which is a third feature of the sixth embodiment, is formed by making a hole inclined in the circumferential direction. The point is that the hole 64b 'is used. That is, as shown in FIGS. 16 and 17, a plurality of, for example, six oblique holes 64b 'are formed in the disk-shaped flange portion 63a formed below the guide member 60b.
[0066]
Further, since the oblique hole 64b 'is formed obliquely in the circumferential direction of the flange portion 63a, the refrigerant flows through the porous member 53' through a long flow path in the porous member 53 'located thereunder. As a result, the retained kinetic energy is consumed more, the bubbles in the refrigerant are fragmented, and the sound deadening effect can be further improved.
[0067]
Although the features of the sixth embodiment have been described, it goes without saying that these features can be individually applied to other inventions or other embodiments, and exert their respective functions and effects.
[0068]
【The invention's effect】
According to the present invention, a member that subdivides the bubbles in the refrigerant, and a small bubble holding channel D that holds the subdivided air bubbles is provided in the valve body, thereby reducing the flow noise of the refrigerant, An electromagnetic valve capable of suppressing noise can be realized. In addition, in addition to the above configuration, by disposing a member for fragmenting the bubbles in the refrigerant on the downstream side of the small bubble holding flow path D, fragmentation of the bubbles of the refrigerant is promoted, and noise is suppressed. The effect is further promoted.
In addition, even when so-called sludge is generated by the refrigerant and the refrigerating machine oil and adheres to the above-mentioned members as contamination, the flow path is not blocked, and there is no shortage of flow rate.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an electromagnetic valve according to a first embodiment in an open state.
FIG. 2 is an enlarged view of a portion A in FIG.
FIG. 3 is a longitudinal sectional view of the solenoid valve according to the first embodiment in a closed state.
FIG. 4 is a longitudinal sectional view of an electromagnetic valve according to a second embodiment in an open state.
FIG. 5 is an enlarged view of a portion B in FIG. 4;
FIG. 6 is a longitudinal sectional view of a solenoid valve according to a second embodiment in a closed state.
FIG. 7 is a longitudinal sectional view of an electromagnetic valve according to a third embodiment in an open state.
FIG. 8 is an enlarged view of a portion C in FIG. 7;
FIG. 9 is an enlarged view of a main part of a solenoid valve according to a fourth embodiment.
FIG. 10 is a longitudinal sectional view of a solenoid valve according to a fourth embodiment in a closed state.
FIG. 11 is a longitudinal sectional view of an electromagnetic valve according to a fifth embodiment in an open state.
FIG. 12 is an enlarged view of a main part of a solenoid valve according to a fifth embodiment.
FIG. 13 is a longitudinal sectional view of an electromagnetic valve according to a sixth embodiment in an open state.
FIG. 14 is an enlarged view of a main part of FIG. 13;
FIG. 15 is a sectional view taken along line BB of FIG. 14;
FIG. 16 is a plan view of a flange portion of the solenoid valve.
FIG. 17 is a sectional view taken along line AA of FIG. 16;
FIG. 18 is another example of a cross section taken along line BB of FIG. 14;
[Explanation of symbols]
D ··· Small bubble holding channel (in the state of fragmented bubbles)
1. Valve body 1a Peripheral wall 1b Pipe fitting hole 2. Electromagnetic coil
3. Suction element 3a ... Locking part 3b ... Pipe part
3c Step 3d Locking recess 4 Valve body 5 Plunger
5a ... fixing hole 5b ... equalizing hole 6 ... valve seat 6a ... valve seat
6b pipe fitting 6c flange 7 coil spring
8. Coil case 9. Pressing and locking member 10. Valve chamber 11. Upper valve chamber
40, 40 ', 40 ", 40a, 40b, 40c ... valve part 41 ... shoulder part
42, 42 ', 42 "··· Side wall
43a · · · space 43b · · · large hole (passage) 43c · · · small diameter hole (passage)
43d ··· Support hole 43e · · · Hole 43f, 43g · · · Gap
44, 44 ', 44 "Bleed hole 44a Large diameter on inlet side
44b ··· Larger diameter on exit side 44c ··· Larger diameter 44d ··· Larger diameter
44e Large diameter part (Embodiment 6) 45 Tip 46 Small diameter part
47, 47 ', 47 "-guide ring member 47a- Inlet-side inclined portion
47b ... uniform diameter part 47c ... outlet side inclined part 47d ... outlet side large diameter part
47e: Large-diameter gap 47f: Large inlet-side diameter
48 ・・ Holding projection (caulking)
51, 51a, 51b, 52, 53, 53 ', 54, 54a, 54b ...
Porous member 60, 60 ', 60 "
60a Guide member (Embodiment 4) 60b Guide member (Embodiment 5)
60c guide member (sixth embodiment) 61, 61 ″, 61a column
62, 62 '... inclined portion 63, 63', 63a ... flange portion
64, 64 ', through hole 64a, large portion on exit side 64b, 64b', oblique hole
80 ... top wall 81 ... bottom wall 82 ... through hole
83 ... through hole 84 ... vertical wall 90 ... body
92 ··· Hanging part 94 · · · Inlet side rising part 95 · · · projection
100 ・・ Inlet side pipe 110 ・・ Outlet side pipe 120 ・・ Bobbin
140 lead wire 150 rivet

Claims

In a solenoid valve which opens and closes a valve by bringing a valve body into and out of contact with a valve seat by an electromagnetic coil, the valve body is provided with a hole on a refrigerant inflow side thereof and a passage communicating with the hole. A first member for dividing air bubbles on the refrigerant inflow side of the valve body is held by the valve body, and a flow path for maintaining the state of the finely divided air bubbles is formed on the refrigerant outflow side of the passage. Solenoid valve characterized by the following.

2. The solenoid valve according to claim 1, wherein a second member for dividing air bubbles is disposed in the passage in the valve body.

In a solenoid valve which opens and closes a valve by moving a valve body toward and away from a valve seat by an electromagnetic coil, the valve body is provided with a hole on a refrigerant inflow side thereof and a passage communicating with the hole. A first member for dividing air bubbles is provided in the passage, and a flow path for maintaining the state of the divided air bubbles is formed on the refrigerant outlet side of the passage, and a downstream side of the flow path is formed. An electromagnetic valve, wherein a second member for dividing air bubbles is disposed on a side.

The flow path for maintaining the state of the fragmented air bubbles comprises a small air bubble holding flow path in which an inducer portion, an orifice portion, and a diffuser portion are formed as a continuous space. A solenoid valve according to any of the preceding claims.

The small bubble holding flow path is composed of a guide ring member and a guide member arranged in the flow path, and the inner circumference of the guide ring member has a funnel-shaped inlet-side inclined portion that becomes narrower downward, and has a uniform inner diameter. A uniform-diameter portion and an inverted funnel-shaped outlet-side inclined portion that expands downward are formed continuously, and the guide member is formed with a columnar portion that is inserted into the inner peripheral portion of the guide ring member. The inducer portion is formed between the inlet-side inclined portion and the columnar portion, the orifice portion is formed between the uniform diameter portion and the columnar portion, and the diffuser portion is the outlet-side inclined portion and the columnar portion. 5. The solenoid valve according to claim 4, wherein the solenoid valve is a continuous space formed between the solenoid valves.

The said 1st and 2nd member consists of a foam metal, a porous plastic, the mesh which knitted the thread | yarn of a metal, or the metal plate which perforated a several hole, The Claims 1 thru | or 5 characterized by the above-mentioned. A solenoid valve according to any of the preceding claims.

A valve body having a valve chamber and having a pipe part closed at one end, an electromagnetic coil provided on the outer periphery of the pipe part of the valve body, a suction element fixed inside the pipe part of the valve body, and a suction element A rod-shaped valve body slidably provided in the longitudinal direction of the pipe portion of the valve body, a plunger connected to the valve body, a valve seat member provided at an open end of the valve body, a suction element and a plunger. Biasing means for biasing the valve body disposed between the valve seat member and the valve seat in a direction opposite to the valve opening direction, wherein the valve seat member is provided inside the valve chamber of the valve body. A solenoid valve that opens and closes the valve by forming a valve seat that separates and contacts the valve body in front of the valve body and moves the valve body toward and away from the valve seat by the electromagnetic coil; A hole and a passage communicating with the hole are provided on the refrigerant inflow side of Alternatively, a member that breaks up bubbles is provided in the refrigerant outflow side and in the passage, and a small bubble holding channel that holds a state of the broken up bubbles is formed in the passage. And a solenoid valve.

8. The valve according to claim 1, wherein an outflow direction of the refrigerant from the outlet of the passage in the valve body is formed so as to intersect an inner wall surface of a valve seat with which the valve body contacts. Any solenoid valve.

The solenoid valve according to any one of claims 3 to 8, wherein the width of the second member is larger than the width of the first member.

The solenoid valve according to any one of claims 1 to 9, wherein when flowing the refrigerant into the first member, the flow direction of the refrigerant is eccentric from a center position of the first member.

11. The refrigerant flowing into the second member, wherein an inflow position is eccentric from a center position of the second member and the inflow direction is inclined. Any solenoid valve.