JP2005003114A - Solenoid valve - Google Patents

Solenoid valve Download PDF

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Publication number
JP2005003114A
JP2005003114A JP2003167866A JP2003167866A JP2005003114A JP 2005003114 A JP2005003114 A JP 2005003114A JP 2003167866 A JP2003167866 A JP 2003167866A JP 2003167866 A JP2003167866 A JP 2003167866A JP 2005003114 A JP2005003114 A JP 2005003114A
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JP
Japan
Prior art keywords
valve
bubbles
refrigerant
valve body
hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003167866A
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Japanese (ja)
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JP2005003114A5 (en
Inventor
Hitoshi Kibune
仁志 木船
Kazuhiro Miyamoto
和弘 宮本
Masayuki Imai
正幸 今井
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Fujikoki Corp
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Fujikoki Corp
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Publication date
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Priority to JP2003167866A priority Critical patent/JP2005003114A/en
Publication of JP2005003114A publication Critical patent/JP2005003114A/en
Publication of JP2005003114A5 publication Critical patent/JP2005003114A5/ja
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/34Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F25B41/345Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by solenoids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/12Sound
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solenoid valve having improved quietness and great durability so that the function of members for fragmenting bubbles is not lost for a long period even when contaminants and dust mixed in refrigerant are deposited thereon. <P>SOLUTION: The solenoid valve opens/closes itself with a valve element 4 moved close to or apart from a valve seat portion 6a by an electromagnetic coil 2. The valve element 4 has a hole 44 on the flow-in side of the refrigerant and a passage 43 in communication with the hole 44. Porous members 51, 52 are provided on the flow-in side of the hole 44 and in the passage 43 for fragmenting the bubbles, and a flow path restriction portion d is formed in the passage on the downstream side of the member. Besides, a porous member 53 is provided on the downstream side of the restriction portion d. The refrigerant flows into the porous member 52 ranging over both of a peripheral side face 52a and an upper face 52b. <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を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、絞り作用に伴なって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問題点があった。
【0004】
そこで、この騒音を低減する技術として、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において、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維持できる絞り装置が開発されているが、本発明者らは、更に冷媒通過音を低減するために技術開発をおこない、弁体に気泡を細分化する部材を一体に組付けると共に、細分化された気泡を再び大きく成長させないようにした発明を提案した(特許文献1参照)。
【0005】
【特許文献1】特開2003−156269号公報
【0006】
以下、特許文献1に開示の発明の概略について図6及び図7を参照して説明する。図6はその電磁弁縦断面図、図7は図6の弁部の拡大図である。
【0007】
この電磁弁は、弁室110を有し一端を閉塞したパイプ部111を有する弁本体101と、弁本体101のパイプ部111の外周に装備された電磁コイル102と、弁本体101のパイプ部111の内部に固定された吸引子103と、吸引子103に弁本体101のパイプ部111の長手方向に摺動自在に設けた棒状の弁体104と、弁体104に連結されたプランジャ105と、弁本体101の開口端に設けた弁座シート部材106と、吸引子103とプランジャ105との間に配設された弁体104を弁座シート部材106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コイルスプリング107とを備えている。弁座シート部材106には、弁体104が離接する弁座118が形成され、パイプ部111は、電磁コイル102を収容するコイルケース108が装備され、コイルケース108がパイプ部111に固定されている。
【0008】
弁本体101の周壁109には、図1に示すように、垂直な中心軸線と直交する方向に入口側パイプ119が接続され、弁本体101のパイプ部111の内部には、弁本体101の弁室110の上側に円筒状の吸引子103が配設され、パイプ部111の内部に固定されている。吸引子103には、これを貫通する棒状の弁体104が弁本体101のパイプ部111の長手方向に沿って摺動自在に設けられ、弁体104の先端部には弁座シート部材106の弁座118に離接する弁部112が形成されている。
【0009】
弁部112は肩部113とこれを介して連通する円筒状の壁部114とからなり、壁部114の内部には空間115が形成される。また、上記弁体104には、その中心部において、上記空間115に連通する小孔122が弁体104の弁部112寄りに横方向に形成される。
【0010】
さらに、弁部112の先端116において、その弁部112内の空間115に気泡を細分化する部材として多孔質部材124が配置される。この多孔質部材124は、所定の厚さの円盤形状に形成され、その円盤の周縁を弁部112の先端にてカシメ固定されることにより弁部112の先端に固定されて、弁部112に保持される。また、気泡を細分化する部材125は、弁部112の肩部113と壁部114にまたがって段部117に当接し、弁部112に圧入により固定して保持された多孔質部材であり、この多孔質部材125は円筒状に形成されると共に、その内周面全周に空間126が弁部112の壁部114との間に形成されており、この空間126に連通する小孔122が弁部112に横方向に空間115に連通して設けられていることになる。
弁体104の外側には、開弁用のコイルスプリング107が配設され、プランジャ105はコイルスプリング107の付勢力により吸引子103と離間する方向に常時付勢されている。弁座シート部材106には、出口側パイプ110が接続されている。
【0011】
かかる電磁弁において、電磁コイル102に通電すると電磁弁は閉弁し、この閉弁状態において、入口側パイプ119と出口側パイプ120とは小孔122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119から流すと冷媒中の大きな気泡は多孔質部材125を通過する際に細分化され、その細分化された状態で空間126に流入して冷媒の通過面積が確保されると共に、空間126内にて冷媒中の気泡は均一に分布して小孔122に流入する。
【0012】
而して、冷媒中に気泡は細分化されているので、冷媒の流動音は低減される。さらに、冷媒は小孔122による絞り作用を経て、弁部112内の空間115に流入する。そして、この空間115内で冷媒中に気泡が大きく成長しても、多孔質部材124を通過する際に気泡は細分化され、出口側パイプ120に流入するので、気泡による冷媒流動音は低減され、冷媒は冷凍サイクル内で冷却・除湿を行うことができる。
【0013】
【発明が解決しようとする課題】
しかしながら、上記公知の電磁弁において冷媒中にコンタミ、ゴミ等が混入している場合に、気泡を細分化する部材の冷媒流入面に付着・集積されて、長期間の使用において、目詰まりを発生させる場合があると考えられる。
【0014】
そこで、このような不具合を想定して、該不具合が発生しないようにする技術として発明されたもので、本発明は、弁体内に気泡を細分化する部材を組み付けるに当って、気泡を細分化する部材の冷媒流入面を、その側壁面に加えて、その上面をも流入面とすることで、静音性の向上と共に、仮に冷媒中に混在するコンタミ、ゴミ等が付着しても、気泡を細分化する部材としての機能が長期間にわたって失われない、耐久性が大きい電磁弁を提供することを目的とする。
【0015】
【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、前記孔の流入側及び前記通路内にそれぞれ気泡を細分化する部材が設けられ、該部材の下流側の流路に流路絞り部が形成され、更に該流路絞り部の下流側の流路に、更に気泡を細分化する部材が設けられていることを特徴とする電磁弁であって、上記通路内に設けられた気泡を細分化する部材に対して、冷媒の流入面を、上記部材の側面と上面としたことを特徴とする。
【0016】
かかる特徴により、冷媒流動音を抑制し、騒音の発生を防止できることに加えて、多孔質部材の製造時にその形状が変形し(だれ)て、冷媒流入面を構成する側面の孔が縮小している場合であっても、また、冷媒中に混在するコンタミ、ゴミ等が付着しても、多孔質部材の上面からの流入が可能であるから、冷媒の流入が円滑に行われる。
【0017】
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、孔の流入側に設けられた気泡を細分化する部材を、弁部の略全側面に配置させたことを特徴とする。
かかる特徴により、該気泡を細分化する部材への冷媒の流入面が該部材の全幅にわたっていることから、多少のコンタミ、ゴミ等が付着しても、機能低下させない。
【0018】
請求項3記載の電磁弁は、請求項1又は請求項2記載の電磁弁において、上記流路絞り部の下流側に配置された気泡を細分化する部材を、複数積層して配置させ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、上記通路内に配置される気泡を細分化する部材を、複数積層して配置させることを特徴とする。
【0019】
かかる請求項3又は請求項4記載の電磁弁の特徴により、気泡を細分化する部材の種類・数・厚み等を種々設計・選択できるから、多くの状況に対応させた状態で気泡の細分化・静音化が促進される。
【0020】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて詳細に説明する。
図1は実施形態1に係る電磁弁の開状態の縦断面図、図2は図1の電磁弁の弁部の拡大図、図3は実施形態1に係る電磁弁の閉状態の縦断面図である。なお、下記の説明において、図面との関係で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。
【0021】
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。
【0022】
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。
【0023】
上記パイプ部3bの外側には、図1に示すように、ボビン2aが嵌合装着され、ボビン2aの周囲には電磁コイル2が巻回され、ボビン2aはコイルケース8の内部に収容されている。上記ボビン2aには、図1に示すように、リード線2cが接続され、電磁コイル2はリード線2cを介して通電される。
【0024】
また、コイルケース8の互いに対向する水平な上壁8a及び下壁8bには垂直な同一中心軸線上に沿って貫通孔8c及び貫通孔8dがそれぞれ設けられ、パイプ部3bが挿通されている。また、コイルケース8の上壁8a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の一端には上方に向って直角に折曲した立上り部が形成され、該立上り部に上記パイプ部3bの係止凹部3dに係合する突起9aが形成されている。また、コイルケース8の上壁8aは、図1に示すように、リベット2bを介して押圧係止部材9に支持されている。
【0025】
更に、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。上記固定用孔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。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。
【0026】
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。
【0027】
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。
【0028】
弁本体1を構成する円筒状の周壁1aの内部には、図1に示すように、弁室10が形成され、上記周壁1aには垂直な弁体4に沿った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1cが溶着されている。
また、上記周壁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。
【0029】
また、上記周壁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部3a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。
【0030】
更に、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1dが溶着され、また、パイプ部3bの外周面には係止凹部3dが形成されている。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。
【0031】
上記吸引子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。
【0032】
弁部40には、図2に示すように、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を有する円筒状の側壁部42が形成され、また、該側壁部42の内部には冷媒の通路となる下方が開放された空間43が形成される。また、この空間43の上部分を構成する上面隙間部44aの上壁には、第2の多孔質部材52(後述)を上方から支持する支持突部44gが形成されている。
【0033】
そして、前記空間43に連通して横断面積が小さい孔、即ち、小孔44が側壁部42に横方向に形成され、該小孔44の両端部は弁部40が開状態において上部弁室11に開口している(図1参照)。但し、図3に示す閉弁状態においては、弁室10で開口する。また、側壁部42内の空間43には後述の案内環部材47が配置され、側壁部42に圧入して嵌合される。なお、上記側壁部42における小孔44の開口部近傍部は薄肉部42bとして形成され、その結果として、小孔44の開口部には、多孔質部材51(後述)との隙間44fが形成される。
【0034】
上記弁部40の肩部41の上部で小孔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が嵌合・保持される。この第1の多孔質部材51は、上下に所定長さで均一径の円筒状物からなり、肩部41の上部に載置され、上記側壁部42の外周部に嵌合され、その上端部の位置まで配置される。また、多孔質部材51の上部は弁体4に装着されるワッシャ48によって支持される。なお、多孔質部材51と小孔44との間には、上下幅の大きい隙間44fが形成されていることから、多孔質部材51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。
【0035】
また、上記空間43の上部には、図2に示すように、気泡を細分化する第2の部材として円柱状の多孔質部材52が配置される。この多孔質部材52は所定厚みの円柱体で側壁部42の内壁に近接する径で構成され、その上面の中心部は支持突部44gによって支持される。また、この支持突部44gによって多孔質部材52の上面52bには上面隙間部44aが形成される。また、多孔質部材52の側周面52aの上部は小孔44に連通している。したがって、小孔44に流入した冷媒は、多孔質部材52の側周面52aの上部、及び、上面52bから多孔質部材52内に流入することになる。
【0036】
そして、この多孔質部材52の下部(下流側)には、案内環部材47(後述)が設けられ、この案内環部材47の下部(下流側)に、第3の多孔質部材53(後述)が配置される。
【0037】
上記のように、弁部40における空間43内には、細分化気泡の状態を保持させるための流路絞り部dが、案内環部材47によって形成される。該案内環部材47は所定厚みの環状部材からなり、上方から下方に入口側径大部47f、細径の流路絞り部d、及び、出口側径大部47dが形成されている。また、この案内環部材47は、図2に示すように、下方から第3の多孔質部材53によって支持される。
【0038】
そして、この案内環部材47を流動する冷媒は、そのエネルギが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。即ち、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。
【0039】
図2に示すように、気泡を細分化する第3の部材として円柱状の多孔質部材53が空間43の下部に配置される。この多孔質部材53は下方の円盤状の支持盤体63(後述)によって支持される。
【0040】
上記各多孔質部材51,52,53は、例えば発泡金属が用いられ、発泡金属として、SUS(ステンレススチール)を用いた場合は、略3g/cm3の高密度の連続気泡の発泡体から構成されている。そして、このような高密度の条件を満たせば、プラスチックやステンレス、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2,3においても同様である。
【0041】
また、上記支持盤体63は、側壁部42の内周面に嵌合可能な大きさで所定厚みの円盤形状に形成され、図2に示すように、通孔64が複数個形成されており、その上部の多孔質部材53を支持しており、支持盤体63は、弁体4下端のカシメ部42aによって支持されている。
弁部40内の冷媒はこの通孔64から、出口側パイプ1dに流出することになる。
【0042】
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。
【0043】
かかる閉弁状態において、入口側パイプ1cと出口側パイプ1dとは、弁室10、上部弁室11、多孔質部材51、隙間44f、小孔44、多孔質部材52、流路絞り部d、多孔質部材53及び支持盤体63と、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1cから流すと、弁体4には小孔44が設けてあるので、絞り作用を受けて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、絞り作用を受けて空間43から出口側パイプ1d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乃至第3の多孔質部材51,52,53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。
【0044】
更に、本発明は前記絞り部dが設けられ、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、第3多孔質部材53を通過する。このとき、更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。そして、冷媒は出口側パイプ1dに流出して、上記冷凍サイクルにおいて冷却及び除湿を行う。
特に、本実施形態1においては、小孔44に流入した冷媒は、多孔質部材52の側周面52aの上部及び上面52bの広い面積から多孔質部材52内に流入することから、側周面52aの上部及び上面52bに、仮にゴミ、コンタミ等が付着しても、冷媒の流入が阻害されることがなく、電磁弁としての機能が低下することはない。
【0045】
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、電磁弁は開弁状態となって、流体が入口側パイプ1c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1dへと流出する。
【0046】
【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に係る電磁弁の縦断面図である。なお、実施形態2においては、実施形態1とは弁部40aの形状が異なるのみで、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。
【0047】
実施形態2においては、実施形態1と比べて、第3の部材である多孔質部材53が2個設けられている点が相違するのみである。即ち、略同一形状の多孔質部材53と多孔質部材53’が、空間43内に積層状態で配置される。即ち、実施形態1の場合と比べて、空間43内における案内環部材47の位置が多孔質部材53’の厚み分だけ高くなると共に、前記多孔質部材53’が配置される長さ(高さ)分だけ空間43が拡大されており、したがって支持突部44g及び小孔44が高い位置に形成され、その分、上面隙間部44aとワッシャ48の距離は短く形成されている。なお、多孔質部材53’は、多孔質部材53に対して、その厚み(上下高さ)、素材、孔径、加工手段等を相違させてもよい。また、単に多孔質部材53’を1個追加するだけでなく更に多くの多孔質部材(図示せず)を追加してもよい。
【0048】
【実施形態3】
次に、実施形態3について説明する。図5は実施形態3に係る電磁弁の縦断面図である。なお、実施形態3においては、実施形態1とは弁部40bの形状が異なるのみで、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。
【0049】
実施形態3においては、実施形態1と比べて、第2の部材である多孔質部材52が2個設けられている点が相違するのみである。即ち、略同一形状の多孔質部材52と多孔質部材52’が空間43内に積層状態で配置される。したがって、実施形態1の場合と比べて、前記多孔質部材52’が配置される長さ(高さ)分だけ空間43が拡大され、したがって支持突部44g及び小孔44が高い位置に形成され、その分、上面隙間部44aとワッシャ48の距離は短く形成されている。なお、多孔質部材52’は、多孔質部材52に対して、その厚み(上下高さ)、素材、孔径、加工手段等を相違させてもよい。また、単に多孔質部材52’を1個追加するだけでなく更に多くの多孔質部材(図示せず)を追加してもよい。
【0050】
なお、上記多孔質部材51,51’,52,52’,53,53’の形状は、円筒形或いは円柱形としたが、その他の形状であってもよい。
【0051】
【発明の効果】
本発明によれば、冷媒中の気泡を細分化する高密度の部材を弁体に設けたことにより、冷媒の流動音を低減し、騒音を抑制することができる。特に、多孔質部材の流入面の一部を製造時の変形が少ない上面としたことで、コンタミ等の多孔質部材の詰まりに伴なう機能低下をなくすることができる。
【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の電磁弁の弁部の拡大図。
【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】実施形態3に係る電磁弁の開状態の縦断面図。
【図6】従来技術に係る電磁弁の縦断面図。
【図7】図6の弁部の拡大図。
【符号の説明】
d・・流路絞り部
1・・弁本体 1a・・周壁 1b・・パイプ嵌合孔
1c・・入口側パイプ 1d・・出口側パイプ
2・・電磁コイル 2a・・ボビン 2b・・リベット 2c・・リード線
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 8a・・上壁 8b・・下壁 8c・・貫通孔
8d・・貫通孔 9・・押圧係止部材 9a・・突起
10・・弁室 11・・上部弁室
40,40a,40b・・弁部 41・・肩部
42・・側壁部 42a・・カシメ部
42b・・薄肉部 43・・空間(通路)
44・・小孔(孔) 44a・・上面隙間部 44f・・隙間
44g・・支持突部 46・・小径部 47・・案内環部材
47d・・出口側径大部 47f・・入口側径大部 48・・ワッシャ
51,51’・・多孔質部材(第1の部材)
52,52’・・多孔質部材(第2の部材)
52a・・側周面 52b・・上面
53,53’・・多孔質部材(第3の部材)
63・・支持盤体 64・・通孔
101・・弁本体(公知) 102・・電磁コイル 103・・吸引子
104・・弁体 105・・プランジャ 106・・弁座シート部材
107・・コイルスプリング 108・・コイルケース
109・・周壁 110・・弁室 111・・パイプ部
112・・弁部 113・・肩部 114・・壁部
115・・空間 116・・先端 117・・段部
118・・弁座 119・・入口側パイプ
120・・出口側パイプ 122・・小孔
124・・多孔質部材(気泡を細分化する部材)
125・・多孔質部材(気泡を細分化する部材)
126・・空間
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electromagnetic valve used for an air conditioner or the like.
[0002]
[Prior art]
Conventionally, a solenoid coil is provided around the plunger tube provided in the valve body, 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 the movable suction element and the plunger are energized by a valve opening spring. There is known a closed solenoid valve when energized in which a plunger and a valve body are coupled by caulking and stored.
[0003]
When such a conventional solenoid valve is used in an air conditioner that performs a dehumidifying operation in a refrigeration cycle, a hole is provided in the valve body as a throttle for the dehumidifying operation. However, when a hole is provided in the valve body, there is a problem in that a refrigerant flow noise may be generated along with the throttling action, and if it occurs, noise is generated.
[0004]
Therefore, as a technology for reducing this noise, in a throttle device used as a throttle valve for dehumidification in an air conditioner having a dehumidifying mode, the refrigerant passing sound in the throttle passage is reduced, and the dehumidifying operation performance is achieved even in long-term use. A throttling device that can be maintained has been developed, but the present inventors have further developed technology to reduce the refrigerant passing sound, and the valve body is integrated with a member for subdividing bubbles, and is further subdivided. An invention has been proposed in which large bubbles are prevented from growing again (see Patent Document 1).
[0005]
[Patent Document 1] Japanese Unexamined Patent Application Publication No. 2003-156269
[0006]
The outline of the invention disclosed in Patent Document 1 will be described below with reference to FIGS. 6 is a longitudinal sectional view of the electromagnetic valve, and FIG. 7 is an enlarged view of the valve portion of FIG.
[0007]
This solenoid valve includes a valve body 101 having a pipe portion 111 having a valve chamber 110 and one end closed, an electromagnetic coil 102 provided on the outer periphery of the pipe portion 111 of the valve body 101, and a pipe portion 111 of the valve body 101. A suction element 103 fixed inside, a rod-shaped valve body 104 slidably provided in the longitudinal direction of the pipe portion 111 of the valve body 101 on the suction element 103, a plunger 105 connected to the valve body 104, A valve seat member 106 provided at the opening end of the valve body 101 and a valve body 104 disposed between the suction element 103 and the plunger 105 are attached in the valve opening direction opposite to the valve seat member 106. And a coil spring 107 which is a biasing means for opening the valve. The valve seat sheet member 106 is formed with a valve seat 118 to which the valve body 104 is separated and connected. The pipe portion 111 is equipped with a coil case 108 that houses the electromagnetic coil 102. The coil case 108 is fixed to the pipe portion 111. Yes.
[0008]
As shown in FIG. 1, an inlet side pipe 119 is connected to the peripheral wall 109 of the valve main body 101 in a direction orthogonal to the vertical central axis, and the valve portion of the valve main body 101 is placed inside the pipe portion 111 of the valve main body 101. A cylindrical suction element 103 is disposed on the upper side of the chamber 110 and is fixed inside the pipe portion 111. The suction element 103 is provided with a rod-shaped valve body 104 penetrating therethrough so as to be slidable along the longitudinal direction of the pipe portion 111 of the valve body 101, and a valve seat sheet member 106 is provided at the tip of the valve body 104. A valve portion 112 that is separated from and in contact with the valve seat 118 is formed.
[0009]
The valve portion 112 includes a shoulder portion 113 and a cylindrical wall portion 114 communicating with the shoulder portion 113. A space 115 is formed inside the wall portion 114. Further, a small hole 122 communicating with the space 115 is formed in the valve body 104 in the lateral direction near the valve section 112 of the valve body 104 at the center thereof.
[0010]
Further, a porous member 124 is disposed at the tip 116 of the valve portion 112 as a member for subdividing bubbles in the space 115 in the valve portion 112. The porous member 124 is formed in a disc shape having a predetermined thickness, and the periphery of the disc is fixed to the tip of the valve portion 112 by caulking and fixing the periphery of the disc at the tip of the valve portion 112. Retained. In addition, the member 125 for subdividing the bubbles is a porous member that contacts the stepped portion 117 across the shoulder portion 113 and the wall portion 114 of the valve portion 112 and is fixed and held in the valve portion 112 by press fitting. The porous member 125 is formed in a cylindrical shape, and a space 126 is formed between the inner peripheral surface of the porous member 125 and the wall portion 114 of the valve portion 112, and a small hole 122 communicating with the space 126 is formed. The valve portion 112 is provided in communication with the space 115 in the lateral direction.
A coil spring 107 for opening the valve is disposed outside the valve body 104, and the plunger 105 is constantly urged in a direction away from the attractor 103 by the urging force of the coil spring 107. An outlet side pipe 110 is connected to the valve seat member 106.
[0011]
In such an electromagnetic valve, when the electromagnetic coil 102 is energized, the electromagnetic valve is closed. In this closed state, the inlet side pipe 119 and the outlet side pipe 120 communicate with each other through the small hole 122. Therefore, during the dehumidifying operation of the predetermined refrigeration cycle, when the refrigerant is flowed from the inlet side pipe 119, large bubbles in the refrigerant are subdivided when passing through the porous member 125, and flow into the space 126 in the subdivided state. Thus, the passage area of the refrigerant is ensured, and the bubbles in the refrigerant are uniformly distributed in the space 126 and flow into the small holes 122.
[0012]
Thus, since the bubbles are subdivided in the refrigerant, the flow noise of the refrigerant is reduced. Further, the refrigerant flows into the space 115 in the valve portion 112 through a throttling action by the small hole 122. Even if bubbles grow large in the refrigerant in the space 115, the bubbles are subdivided when passing through the porous member 124 and flow into the outlet side pipe 120, so that the refrigerant flow noise due to the bubbles is reduced. The refrigerant can be cooled and dehumidified in the refrigeration cycle.
[0013]
[Problems to be solved by the invention]
However, when contamination, dust, etc. are mixed in the refrigerant in the above-mentioned known solenoid valve, it will adhere and accumulate on the refrigerant inflow surface of the member that subdivides the bubbles, causing clogging in long-term use It may be possible to
[0014]
Therefore, assuming such a problem, the invention was invented as a technique for preventing the problem from occurring. The present invention subdivides the bubbles when assembling a member for subdividing the bubbles in the valve body. In addition to the sidewall surface of the refrigerant inflow surface of the member to be used, the upper surface is also the inflow surface, so that noise is improved, and even if contamination, dust, etc. mixed in the refrigerant adhere to the air bubbles, An object of the present invention is to provide a highly durable electromagnetic valve that does not lose its function as a subdivided member over a long period of time.
[0015]
[Means for Solving the Problems]
In order to achieve the above object, the solenoid valve according to the present invention has the following means. That is,
The electromagnetic valve according to claim 1 is an electromagnetic valve that opens and closes the valve body by bringing the valve body into and out of contact with the valve seat portion by means of an electromagnetic coil. A communication passage is provided, a member for subdividing bubbles is provided in the inflow side of the hole and in the passage, and a flow restrictor is formed in a flow path on the downstream side of the member. A solenoid valve characterized in that a member for further subdividing bubbles is provided in the flow path on the downstream side of the throttle part, and for the member for subdividing the bubbles provided in the passage, The inflow surface of the refrigerant is the side surface and the upper surface of the member.
[0016]
In addition to being able to suppress refrigerant flow noise and prevent noise generation, this feature deforms (sagging) the shape of the porous member during manufacturing, reducing the side holes constituting the refrigerant inflow surface. Even if it is a case, and even if the contamination, dust, etc. which are mixed in a refrigerant | coolant adhere, inflow from the upper surface of a porous member is possible, inflow of a refrigerant | coolant is performed smoothly.
[0017]
The electromagnetic valve according to claim 2 is characterized in that, in the electromagnetic valve according to claim 1, members for subdividing the bubbles provided on the inflow side of the hole are arranged on substantially all side surfaces of the valve portion.
With this feature, since the inflow surface of the refrigerant to the member that subdivides the bubbles extends over the entire width of the member, the function does not deteriorate even if some contamination, dust, or the like adheres.
[0018]
According to a third aspect of the present invention, in the electromagnetic valve according to the first or second aspect, a plurality of members for subdividing the air bubbles disposed downstream of the flow passage restricting portion are disposed. Features.
The electromagnetic valve according to claim 4 is the electromagnetic valve according to any one of claims 1 to 3, wherein a plurality of members for subdividing the bubbles arranged in the passage are arranged in a stacked manner. To do.
[0019]
According to the characteristics of the electromagnetic valve according to claim 3 or claim 4, since the types, number, thickness, etc. of the members that subdivide the bubbles can be variously designed and selected, the bubbles can be subdivided in a state corresponding to many situations.・ Noise reduction is promoted.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 is a longitudinal sectional view of an electromagnetic valve according to Embodiment 1 in an open state, FIG. 2 is an enlarged view of a valve portion of the electromagnetic valve in FIG. 1, and FIG. 3 is a longitudinal sectional view of a solenoid valve according to Embodiment 1 in a closed state. It is. In the following description, vertical and horizontal expressions are used in relation to the drawings, but the actual positional relationship is not limited to this.
[0021]
As shown in FIG. 1, the solenoid valve of the present invention has a valve chamber 10 inside the valve body 1, and one end is closed on the upper part of the valve body 1 via a locking portion 3 a of the 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 shape is slidable with respect to the attractor 3 in the longitudinal direction of the pipe portion 3b. The valve body 4 is provided.
[0022]
In addition, this electromagnetic valve is arranged 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 valve opening urging means that urges the valve body 4 in the valve opening direction opposite to the valve seat 6.
[0023]
As shown in FIG. 1, a bobbin 2 a is fitted on the outside of the pipe portion 3 b, the electromagnetic coil 2 is wound around the bobbin 2 a, and the bobbin 2 a is accommodated inside the coil case 8. Yes. As shown in FIG. 1, a lead wire 2c is connected to the bobbin 2a, and the electromagnetic coil 2 is energized via the lead wire 2c.
[0024]
Further, the horizontal upper wall 8a and the lower wall 8b facing each other of the coil case 8 are respectively provided with a through hole 8c and a through hole 8d along the same vertical axis, and the pipe portion 3b is inserted therethrough. Further, as shown in FIG. 1, a press locking member 9 made of sheet metal is disposed on the upper portion of the upper wall 8 a of the coil case 8, and one end of the press locking member 9 is directed upward at a right angle. A bent rising portion is formed, and a protrusion 9a that engages with the locking recess 3d of the pipe portion 3b is formed on the rising portion. Further, as shown in FIG. 1, the upper wall 8a of the coil case 8 is supported by the press locking member 9 via the rivet 2b.
[0025]
Further, as shown in FIG. 1, a cylindrical plunger 5 is movably disposed inside the pipe body 3 b near the upper end of the valve body 1, and the end wall of the plunger 5 is on a central axis perpendicular to the end wall. A fixing hole 5a for fixing the small diameter portion 46 of the valve body 4 is provided along the same. Reference numeral 5b is a pressure equalizing hole. As shown in FIG. 1, a small-diameter portion 46 of the valve body 4 is fitted into the fixing hole 5 a from below, and the distal end of the small-diameter portion 46 of the valve body 4 is crimped so that the plunger 5 The small diameter part 46 of the body 4 is connected. As shown in FIG. 1, a coil spring 7 for valve opening is disposed outside the valve body 4 between the suction element 3 and the plunger 5, and the plunger 5 is attracted by the biasing force of the coil spring 7. 3 is always energized in a direction away from 3.
[0026]
As shown in FIG. 1, the valve seat 6 is formed with a valve seat portion 6 a that faces the inside of the valve chamber 10 of the valve body 1 and contacts the valve body 4, and the valve seat 6 is welded and fixed to the valve body 1. Has been. The valve body 1 and the valve seat 6 are made of stainless steel, and the valve body 1 and the valve seat 6 are formed by pressing.
[0027]
As shown in FIG. 1, a coil case 8 that accommodates the electromagnetic coil 2 is provided on the outer periphery of the pipe portion 3 b, and a press locking member 9 fixed to the coil case 8 is attached to the pipe portion 3 b of the valve body 1. The coil case 8 is fixed to the pipe portion 3b of the valve main body 1 through the press locking member 9 by being locked in the formed locking recess 3d.
[0028]
As shown in FIG. 1, a valve chamber 10 is formed inside a cylindrical peripheral wall 1 a constituting the valve body 1, and the peripheral wall 1 a is perpendicular to a central axis along a vertical valve body 4. A pipe fitting hole 1b is provided, and the inlet side pipe 1c is welded.
A valve seat 6 is attached to the lower end of the peripheral wall 1a. The valve seat 6 includes a pipe-shaped valve seat portion 6a, a pipe fitting portion 6b formed at a lower portion of the valve seat portion 6a, a flange 6c formed at 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.
[0029]
A suction element 3 is attached to the upper end of the peripheral wall 1a. The suction element 3 is formed with a step portion 3c at the lower portion thereof, and the upper end of the peripheral wall 1a of the valve body 1 is attached to the lower portion of the step portion 3c. A lower portion of the pipe portion 3b is attached to a locking portion 3a formed on the outer periphery of the upper portion of the suction element 3. Moreover, the upper end of this pipe part 3b is obstruct | occluded.
[0030]
Further, an outlet side pipe 1d is welded to the pipe fitting portion 6b formed at the lower part of the valve seat 6, and a locking recess 3d is formed on the outer peripheral surface of the pipe portion 3b. A concave portion communicating with the lower valve chamber 10 is formed in the lower portion of the suction element 3 to constitute an upper valve chamber 11.
[0031]
As shown in FIG. 1, the suction element 3 is provided with a rod-like valve body 4 made of, for example, brass penetrating therethrough so as to be slidable along the longitudinal direction of the pipe portion 3 b. A valve portion 40 is formed so as to be separated from and in contact with the valve seat portion 6 a of the valve seat 6, and a small diameter portion 46 is formed at the upper end portion of the valve body 4. The small-diameter portion 46 is fitted and fixed in the fixing hole 5a below the plunger 5.
[0032]
As shown in FIG. 2, the valve portion 40 is formed with a cylindrical side wall portion 42 having a diameter larger than the valve stem portion above the valve portion 40 and having a shoulder portion 41 serving as a stepped portion thereof. Inside the portion 42, a space 43 is formed in which a lower portion serving as a refrigerant passage is opened. A support protrusion 44g that supports a second porous member 52 (described later) from above is formed on the upper wall of the upper surface gap 44a that constitutes the upper portion of the space 43.
[0033]
A hole having a small cross-sectional area communicating with the space 43, that is, a small hole 44 is formed in the side wall portion 42 in the lateral direction, and both end portions of the small hole 44 are in the upper valve chamber 11 when the valve portion 40 is open. (See FIG. 1). However, in the valve-closed state shown in FIG. Further, a guide ring member 47 described later is disposed in the space 43 in the side wall portion 42 and is press-fitted into the side wall portion 42 to be fitted. In addition, the opening part vicinity of the small hole 44 in the said side wall part 42 is formed as the thin part 42b, As a result, the clearance gap 44f with the porous member 51 (after-mentioned) is formed in the opening part of the small hole 44. The
[0034]
The first porous member 51 is fitted and held as a member for subdividing the bubbles in the refrigerant so as to face the opening of the small hole 44 above the shoulder portion 41 of the valve portion 40. The first porous member 51 is formed of a cylindrical member having a uniform length and a predetermined length in the vertical direction, is placed on the upper portion of the shoulder portion 41, is fitted to the outer peripheral portion of the side wall portion 42, and has an upper end portion. To the position of. The upper part of the porous member 51 is supported by a washer 48 attached to the valve body 4. Since a gap 44f having a large vertical width is formed between the porous member 51 and the small hole 44, the flow path range of the refrigerant in the porous member 51 is widened and the bubbles are finely divided. Is promoted.
[0035]
In addition, as shown in FIG. 2, a cylindrical porous member 52 is disposed above the space 43 as a second member for subdividing the bubbles. The porous member 52 is a cylindrical body having a predetermined thickness and has a diameter close to the inner wall of the side wall portion 42, and the center portion of the upper surface thereof is supported by the support protrusion 44g. Further, the upper surface gap portion 44a is formed on the upper surface 52b of the porous member 52 by the support protrusion 44g. Further, the upper part of the side peripheral surface 52 a of the porous member 52 communicates with the small hole 44. Therefore, the refrigerant that has flowed into the small holes 44 flows into the porous member 52 from the upper part of the side peripheral surface 52a of the porous member 52 and the upper surface 52b.
[0036]
A guide ring member 47 (described later) is provided at the lower part (downstream side) of the porous member 52, and a third porous member 53 (described later) is provided at the lower part (downstream side) of the guide ring member 47. Is placed.
[0037]
As described above, in the space 43 in the valve portion 40, the flow passage restricting portion d for maintaining the state of the subdivided bubbles is formed by the guide ring member 47. The guide ring member 47 is made of an annular member having a predetermined thickness, and has an inlet-side large diameter portion 47f, a small-diameter channel restricting portion d, and an outlet-side large diameter portion 47d formed from above to below. The guide ring member 47 is supported by the third porous member 53 from below as shown in FIG.
[0038]
The refrigerant flowing through the guide ring member 47 is converted into velocity energy relatively slowly and does not undergo rapid contraction / expansion. Therefore, even when bubbles are included in the refrigerant. There is no rapid growth (expansion) of bubbles. That is, even if there are subdivided bubbles in the refrigerant, they do not grow greatly.
[0039]
As shown in FIG. 2, a cylindrical porous member 53 is disposed in the lower portion of the space 43 as a third member for subdividing the bubbles. The porous member 53 is supported by a lower disc-shaped support disc body 63 (described later).
[0040]
Each of the porous members 51, 52, and 53 is made of, for example, foam metal. When SUS (stainless steel) is used as the foam metal, the porous members 51, 52, and 53 are each composed of a high-density open-cell foam of about 3 g / cm 3. ing. If such a high density condition is satisfied, a metal mesh member formed by knitting a metal thread such as plastic, stainless steel, brass or the like into a mesh shape to a predetermined thickness may be used. Furthermore, you may use what formed the predetermined number of through-holes in the metal plate of predetermined thickness. In addition, the material of these porous members is the same also in later-described Embodiments 2 and 3.
[0041]
Further, the support plate 63 is formed in a disc shape having a predetermined thickness with a size that can be fitted to the inner peripheral surface of the side wall portion 42, and a plurality of through holes 64 are formed as shown in FIG. The upper porous member 53 is supported, and the support plate 63 is supported by a caulking portion 42 a at the lower end of the valve body 4.
The refrigerant in the valve portion 40 flows out from the through hole 64 to the outlet side pipe 1d.
[0042]
Next, the operation of Embodiment 1 of the present invention will be described.
First, the dehumidifying operation will be described. When this electromagnetic valve is energized to the electromagnetic coil 2, a magnetic force is generated in the attractor 3 by energization of the electromagnetic coil 2, the attractor 3 attracts the plunger 5 downward, and the plunger 5 is a pipe portion of the valve body 1. 3b is moved downward while resisting the urging force of the coil spring 7 by suction of the suction element 3, and at the same time, the valve body 4 is guided by the suction element 3 and the valve seat portion 6a of the valve seat 6 together with the plunger 5. As shown in FIG. 3, the valve portion 40 of the valve body 4 is in close contact with the valve seat portion 6a of the valve seat 6, and the electromagnetic valve is closed.
[0043]
In such a valve-closed state, the inlet side pipe 1c and the outlet side pipe 1d include the valve chamber 10, the upper valve chamber 11, the porous member 51, the gap 44f, the small hole 44, the porous member 52, the flow passage restricting portion d, The porous member 53 and the support plate 63 communicate with each other. Therefore, during the dehumidifying operation of the predetermined refrigeration cycle, when the refrigerant is caused to flow from the inlet side pipe 1c, the valve body 4 is provided with the small holes 44. The kinetic energy is reduced, and the flow noise of the refrigerant is reduced. In addition, even if bubbles are generated in the refrigerant that flows out from the space 43 to the outlet side pipe 1d due to the squeezing action, the refrigerant uses the first to third porous members 51, 52, and 53 as members that subdivide the bubbles. When passing, the bubbles in the refrigerant are subdivided, and the flow noise of the refrigerant due to the bubbles is reduced.
[0044]
Further, in the present invention, since the throttle part d is provided and the subdivided refrigerant is allowed to pass, the subdivided bubbles pass through the third porous member 53 without growing again and growing. To do. At this time, the bubbles in the refrigerant are further subdivided, and the flow noise of the refrigerant due to the bubbles is reduced. And a refrigerant | coolant flows out into the exit side pipe 1d, and performs cooling and dehumidification in the said refrigerating cycle.
In particular, in the first embodiment, the refrigerant flowing into the small hole 44 flows into the porous member 52 from the wide area of the upper surface 52a and the upper surface 52b of the porous member 52. Even if dust, contamination, or the like adheres to the upper part 52a and the upper surface 52b, the inflow of the refrigerant is not hindered and the function as an electromagnetic valve is not deteriorated.
[0045]
Further, when the energization to the electromagnetic coil 2 is interrupted, no magnetic force is generated in the attractor 3, the attractor 3 loses the attracting force, and the plunger 5 urges the inside of the pipe portion 3 b of the valve body 1 by the coil spring 7. As a result, the valve body 4 moves upward together with the plunger 5 while being guided by the suction element 3, and as shown in FIGS. The solenoid valve is opened from the valve seat 6a of the valve seat 6, and the fluid flows out from the inlet side pipe 1c through the valve chamber 10 and the valve seat 6 to the outlet side pipe 1d.
[0046]
Embodiment 2
Next, Embodiment 2 will be described. FIG. 4 is a longitudinal sectional view of the electromagnetic valve according to the second embodiment. In the second embodiment, only the shape of the valve portion 40a is different from that in the first embodiment, and the other configurations are the same. Therefore, the same parts as those in FIG. .
[0047]
The second embodiment is different from the first embodiment only in that two porous members 53 that are third members are provided. That is, the porous member 53 and the porous member 53 ′ having substantially the same shape are arranged in a stacked state in the space 43. That is, compared with the case of Embodiment 1, the position of the guide ring member 47 in the space 43 is increased by the thickness of the porous member 53 ′, and the length (height) at which the porous member 53 ′ is disposed. ), The space 43 is enlarged, so that the support protrusion 44g and the small hole 44 are formed at a high position, and the distance between the upper surface gap 44a and the washer 48 is shortened accordingly. The porous member 53 ′ may be different from the porous member 53 in thickness (vertical height), material, pore diameter, processing means, and the like. Further, not only one porous member 53 ′ but also more porous members (not shown) may be added.
[0048]
Embodiment 3
Next, Embodiment 3 will be described. FIG. 5 is a longitudinal sectional view of a solenoid valve according to the third embodiment. In the third embodiment, only the shape of the valve portion 40b is different from that of the first embodiment, and the other configurations are the same. Therefore, the same parts as those in FIG. .
[0049]
The third embodiment is different from the first embodiment only in that two porous members 52 that are second members are provided. That is, the porous member 52 and the porous member 52 ′ having substantially the same shape are arranged in a stacked state in the space 43. Therefore, as compared with the case of the first embodiment, the space 43 is enlarged by the length (height) in which the porous member 52 ′ is disposed, and thus the support protrusions 44 g and the small holes 44 are formed at higher positions. Accordingly, the distance between the upper surface gap 44a and the washer 48 is formed short. The porous member 52 ′ may be different from the porous member 52 in thickness (vertical height), material, pore diameter, processing means, and the like. Further, not only one porous member 52 ′ but also more porous members (not shown) may be added.
[0050]
The porous members 51, 51 ′, 52, 52 ′, 53, 53 ′ have a cylindrical shape or a columnar shape, but may have other shapes.
[0051]
【The invention's effect】
According to the present invention, by providing the valve body with a high-density member that subdivides the bubbles in the refrigerant, the flow noise of the refrigerant can be reduced and noise can be suppressed. In particular, since a part of the inflow surface of the porous member is an upper surface with little deformation during production, it is possible to eliminate the functional deterioration due to clogging of the porous member such as contamination.
[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 valve portion of the solenoid valve of FIG.
FIG. 3 is a longitudinal sectional view of the electromagnetic 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 a longitudinal sectional view of an electromagnetic valve according to a third embodiment in an open state.
FIG. 6 is a longitudinal sectional view of a solenoid valve according to the prior art.
7 is an enlarged view of the valve portion of FIG. 6;
[Explanation of symbols]
d ・ ・ Flow path restricting part
1. Valve body 1a ... Peripheral wall 1b ... Pipe fitting hole
1c ・ ・ Inlet side pipe 1d ・ ・ Outlet side pipe
2 .... Electromagnetic coil 2a ... Bobbin 2b ... Rivet 2c ... Lead wire
3. Suction element 3a ... Locking part 3b ... Pipe part
3c ·· Step 3d · · Locking recess 4 · · Valve body
5. ・ Plunger 5a ・ ・ Hole for fixing 5b ・ ・ Equal pressure hole
6. ・ Valve seat 6a ・ ・ Valve seat 6b ・ ・ Pipe fitting 6c ・ ・ Flange
7. Coil spring
8. ・ Coil case 8a ・ ・ Upper wall 8b ・ ・ Lower wall 8c ・ ・ Through hole
8d ・ ・ Through hole 9 ・ ・ Pressure locking member 9a ・ ・ Protrusion
10. ・ Valve chamber 11. ・ Upper valve chamber
40, 40a, 40b ... Valve part 41 ... Shoulder
42 .. Side wall part 42a .. Caulking part
42b .. Thin part 43 .. Space (passage)
44 ·· Small holes (holes) 44a · · Upper surface clearance 44f · · Clearance
44g ・ ・ Supporting projection 46 ・ ・ Small diameter part 47 ・ ・ Guide ring member
47d ··· outlet side large diameter portion 47f · · inlet side large diameter portion 48 · · washers
51,51 '.. Porous member (first member)
52, 52 '.. Porous member (second member)
52a ... Side peripheral surface 52b ... Upper surface
53, 53 '.. Porous member (third member)
63 .. Supporting plate body 64..
101 ... Valve body (known) 102 ... Electromagnetic coil 103 ... Aspirator
104 .. Valve body 105.. Plunger 106.. Valve seat member
107 ・ ・ Coil spring 108 ・ ・ Coil case
109 ... Peripheral wall 110 ... Valve room 111 ... Pipe part
112 ... Valve 113 ... Shoulder 114 ... Wall
115 ··· Space 116 ·· Tip 117 ·· Step
118..Valve seat 119..Inlet side pipe
120 .. outlet pipe 122 .. small hole
124 .. Porous member (member for subdividing bubbles)
125 .. Porous member (member for subdividing bubbles)
126 .. Space

Claims (4)

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、前記孔の流入側及び前記通路内にそれぞれ気泡を細分化する部材が設けられ、該部材の下流側の流路に流路絞り部が形成され、更に該流路絞り部の下流側の流路に、更に気泡を細分化する部材が設けられている電磁弁であって、上記通路内に設けられた気泡を細分化する部材に対して、冷媒の流入面を、該部材の側面と上面としたことを特徴とする電磁弁。In the electromagnetic valve that opens and closes the valve by bringing the valve body into and out of contact with the valve seat by the electromagnetic coil, the valve body is provided with a hole on the refrigerant inflow side and a passage communicating with the hole. A member for subdividing bubbles is provided on the inflow side of the hole and in the passage, and a flow restrictor is formed in the flow path on the downstream side of the member, and further on the flow path on the downstream side of the flow restrictor. Further, the solenoid valve is provided with a member for subdividing the bubbles, and the inflow surface of the refrigerant is the side surface and the top surface of the member with respect to the member for subdividing the bubbles provided in the passage. A solenoid valve characterized by that. 孔の流入側に設けられた気泡を細分化する部材を、弁部の略全側面に配置させたことを特徴とする請求項1記載の電磁弁。2. The electromagnetic valve according to claim 1, wherein a member for subdividing the bubbles provided on the inflow side of the hole is disposed on substantially the entire side surface of the valve portion. 上記流路絞り部の下流側に配置された気泡を細分化する部材を、複数積層して配置させることを特徴とする請求項1又は請求項2記載の電磁弁。The electromagnetic valve according to claim 1 or 2, wherein a plurality of members for subdividing the bubbles arranged downstream of the flow restrictor are stacked and arranged. 上記通路内に配置される気泡を細分化する部材を、複数積層して配置させることを特徴とする請求項1乃至請求項3記載のいずれかの電磁弁。4. The electromagnetic valve according to claim 1, wherein a plurality of members for subdividing the bubbles disposed in the passage are disposed in a stacked manner.
JP2003167866A 2003-06-12 2003-06-12 Solenoid valve Pending JP2005003114A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006090678A1 (en) * 2005-02-22 2006-08-31 Kabushiki Kaisha Saginomiya Seisakusho Restriction device, flow rate control valve, and air conditioner having the flow rate control valve assembled therein
CN101893097A (en) * 2009-05-22 2010-11-24 浙江三花股份有限公司 Electromagnetic valve and electromagnetic valve element
CN102192358A (en) * 2010-03-09 2011-09-21 浙江三花股份有限公司 Solenoid valve
CN103104746A (en) * 2011-11-10 2013-05-15 株式会社鹭宫制作所 Dehumidification valve
JP2017211034A (en) * 2016-05-26 2017-11-30 株式会社不二工機 Flow rate regulating valve
JP2018150959A (en) * 2017-03-10 2018-09-27 株式会社鷺宮製作所 Motor valve and refrigeration cycle system
JP2019128001A (en) * 2018-01-25 2019-08-01 株式会社不二工機 Flow rate regulation valve
CN112484349A (en) * 2020-11-13 2021-03-12 苏州众捷汽车零部件股份有限公司 Expansion valve and production process thereof

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JP2004360708A (en) * 2003-02-21 2004-12-24 Fuji Koki Corp Solenoid valve

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JPS5765557A (en) * 1980-10-09 1982-04-21 Hitachi Ltd Refrigerant decompressor
JPH01152176U (en) * 1988-04-12 1989-10-20
JPH02141778U (en) * 1989-05-02 1990-11-29
JPH058160U (en) * 1991-07-18 1993-02-05 カヤバ工業株式会社 Switching valve
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JP2003156269A (en) * 2001-11-20 2003-05-30 Fuji Koki Corp Solenoid valve
JP2004360708A (en) * 2003-02-21 2004-12-24 Fuji Koki Corp Solenoid valve

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006090678A1 (en) * 2005-02-22 2006-08-31 Kabushiki Kaisha Saginomiya Seisakusho Restriction device, flow rate control valve, and air conditioner having the flow rate control valve assembled therein
JP2006266662A (en) * 2005-02-22 2006-10-05 Saginomiya Seisakusho Inc Throttle device, flow control valve, and air conditioner incorporating the same
CN101893097A (en) * 2009-05-22 2010-11-24 浙江三花股份有限公司 Electromagnetic valve and electromagnetic valve element
CN102192358A (en) * 2010-03-09 2011-09-21 浙江三花股份有限公司 Solenoid valve
CN103104746A (en) * 2011-11-10 2013-05-15 株式会社鹭宫制作所 Dehumidification valve
JP2017211034A (en) * 2016-05-26 2017-11-30 株式会社不二工機 Flow rate regulating valve
JP2018150959A (en) * 2017-03-10 2018-09-27 株式会社鷺宮製作所 Motor valve and refrigeration cycle system
JP2019128001A (en) * 2018-01-25 2019-08-01 株式会社不二工機 Flow rate regulation valve
WO2019146345A1 (en) * 2018-01-25 2019-08-01 株式会社不二工機 Flow regulating valve
CN112484349A (en) * 2020-11-13 2021-03-12 苏州众捷汽车零部件股份有限公司 Expansion valve and production process thereof

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