JP4114457B2

JP4114457B2 - Shut-off valve and air conditioner

Info

Publication number: JP4114457B2
Application number: JP2002298967A
Authority: JP
Inventors: 高宏岡本; 繁治平良; 淳小泉
Original assignee: Daikin Industries Ltd
Current assignee: Daikin Industries Ltd
Priority date: 2002-10-11
Filing date: 2002-10-11
Publication date: 2008-07-09
Anticipated expiration: 2022-10-11
Also published as: JP2004132498A

Description

【０００１】
【発明の属する技術分野】
本発明は、閉鎖弁およびこの閉鎖弁を用いた空気調和機に関する。
【０００２】
【従来の技術】
従来、空気調和機としては、室内熱交換器とガス閉鎖弁と圧縮機と室外熱交換器と手動閉鎖弁とキャピラリと液閉鎖弁とを順次ループ状に接続して、冷媒回路を構成したものがある。上記キャピラリは、フレア等の継手によって冷媒回路に接続されている。
【０００３】
【特許文献１】
特開平１１−６３７３７号公報（第１図）
【０００４】
【発明が解決しようとする課題】
しかしながら、上記従来の空気調和機では、キャピラリと液閉鎖弁とを別部材としているので、キャピラリと液閉鎖弁とのために大きなスペースを必要とし、空気調和機が大型化するという問題がある。
【０００５】
また、上記キャピラリを配管に接続するとき、キャピラリの両端を配管にする必要があり、空気調和機を製造するときのコストと工数が増大するという問題もある。
【０００６】
そこで、本発明の目的は、簡単安価に製造できる減圧機能を有するコンパクトな閉鎖弁を提供することにある。
【０００７】
【課題を解決するための手段】
上記目的を達成するため、請求項１の発明の閉鎖弁は、
入口と出口と、上記入口と出口の間に設けられた弁座とを有する本体と、上記弁座に接離する弁体とを備えた閉鎖弁において、
上記弁座の少なくとも片側にオリフィス部材を設け、
上記入口と上記出口とを接続する流体通路に、略鼓形状の流体通路部分を設け、
上記オリフィス部材が、上記本体に嵌め込まれる前において、
上記オリフィス部材は、オリフィスを有する円板状のオリフィス部と、上記オリフィスの中心軸と略同一の中心軸を有する第１テーパ部と、この第１テーパ部に連なる第２テーパ部とを有し、
上記第１テーパ部の上記中心軸からの傾きは、上記第２テーパ部の上記中心軸からの傾きよりも大きくなっており、
上記オリフィス部材が上記本体に固定されている状態で、上記第１テーパ部は、上記略鼓状の流体通路部分のテーパ面に適合していることを特徴としている。
【０００８】
上記オリフィス部材は、上記本体と別部材であっても良く、上記本体の一部であっても良い。
【０００９】
上記請求項１の発明の閉鎖弁によれば、上記弁座の少なくとも片側にオリフィス部材を設け、冷媒等の流体を膨張する機能を閉鎖弁に付加しているので、この閉鎖弁を例えば空気調和機等の冷媒回路中に設置することによって、このオリフィス部材を通過した流体を膨張させて減圧できる。したがって、空気調和機等の装置の回路中の閉鎖弁の外部にキャピラリまたは膨張弁を設けることなしに、流体を膨張減圧することができる。したがって、別体のキャピラリまたは膨張弁を省略できて、スペースを節約でき、空気調和機等をコンパクトにできる。
【００１０】
また、請求項２の発明の閉鎖弁は、請求項１に記載の閉鎖弁において、上記弁座の両側にオリフィス部材を設けたことを特徴としている。
【００１１】
上記請求項２の発明の閉鎖弁によれば、上記弁座の両側にオリフィス部材が設けられているので、冷媒等の流体がこの閉鎖弁を通過するときに生じる上記流体の膨張減圧効果を増大できる。
【００１２】
また、請求項３の発明の閉鎖弁は、請求項１または２に記載の閉鎖弁において、上記入口と上記出口の内の少なくとも一方に、オリフィス部材を挿入して設けたことを特徴としている。
【００１３】
上記請求項３の発明の閉鎖弁によれば、上記オリフィス部材を上記入口と上記出口の内の少なくとも一方に挿入して設けているので、上記オリフィス部材を閉鎖弁の中に簡単に組み込むことができて、ひいては閉鎖弁の製造コストを低減できる。
【００１４】
また、請求項４の発明の閉鎖弁は、請求項１乃至３のいずれか１つに記載の閉鎖弁において、上記入口と出口との間にフィルタ部材を設けたことを特徴としている。
【００１５】
上記請求項４の発明の閉鎖弁によれば、上記本体の入口と出口の間にフィルタ部材が設けられているので、上記入口から冷媒等と共に流れてくるごみ等の異物をこのフィルタ部材で捕獲できる。したがって、異物のオリフィス部材、室外熱交換器、室内熱交換器および圧縮機への侵入を防止できるので、空気調和機等の故障を防止できる。
【００１６】
また、請求項５の発明の閉鎖弁は、請求項４に記載の閉鎖弁において、上記オリフィス部材と上記フィルタ部材とを一体に形成したことを特徴としている。
【００１７】
上記請求項５の発明の閉鎖弁によれば、上記オリフィス部材と上記フィルタ部材とを一体に形成したので、フィルタ部材を閉鎖弁の中に簡単に組み込むことができて、フィルタ部材を閉鎖弁に組み込むときのコストと工数を低減できる。
【００１８】
また、請求項６の発明の空気調和機は、圧縮機と、室外熱交換器と、請求項１乃至５のいずれか１つに記載の閉鎖弁と、室内熱交換器とを接続した冷媒回路を備えることを特徴としている。
【００１９】
上記請求項６の発明の空気調和機によれば、空気調和機の閉鎖弁中にオリフィス部材を設け、この閉鎖弁を通常の閉鎖弁本来の機能の他に膨張手段として機能させているので、キャピラリまたは膨張弁を設ける必要がない。したがって、空気調和機をコンパクト、かつ、安価にすることができる。
【００２０】
【発明の実施の形態】
以下、本発明を図示の実施の形態により詳細に説明する。
【００２１】
（第１実施形態）
図１（Ａ）に、この発明の第１実施形態の閉鎖弁の断面図を示す。この閉鎖弁は、例えば、黄銅製の本体１と、黄銅製の弁体２と、ステンレス製のオリフィス部材３とを備えている。
【００２２】
上記本体１は、入口６と、出口７と、入口６と出口７とを接続する断面L字状に屈曲した流体通路８とを備える。上記流体通路８の屈曲部に弁座９を形成している。また、上記流体通路８の屈曲部と出口７の間に、略鼓形状（中央がくびれた円筒形状）の流体通路部分１１を設けている。
【００２３】
一方、上記弁体２は、本体１と螺合するねじ部１２と、六角レンチを挿入する六角穴１３と、上記本体１の弁座９と密着して本体１と弁体２の間をシールするテーパ面１６と、本体１と弁体２の間の隙間から冷媒等が外部に漏れるのを防止するＯリング１７とを備えている。
【００２４】
また、上記オリフィス部材３は、本体１と別部材となっており、本体1の上記略鼓状の流体通路部分１１の出口６側に嵌め込まれている。
【００２５】
図１（Ｂ）は、本体１に嵌め込む前のオリフィス部材３の断面図である。上記オリフィス部材３は、図１（Ｂ）に示すように、凹部２０を有する蓋状の環状部材であり、オリフィス２１を有する円板状のオリフィス部２２と、このオリフィス部２２の外周部から軸方向に突出すると共に、上記オリフィス１５の中心軸αと同一の中心軸αを有する円筒部２３と、この円筒部２３に連なる第１テーパ部２４と、この第１テーパ部２４に連なる第２テーパ部２５とから構成されている。
【００２６】
上記第１テーパ部２４の中心軸αからの傾きは、第２テーパ部２５の中心軸αからの傾きよりも大きくなっている。上記第１テーパ部２４は、上記略鼓状の流体通路部分１１の出口７側のテーパ面に適合するように、この流体通路部分１１の出口７側のテーパ面の形状と略同一の形状に形づくられている。一方、第２テーパ部２５は、中心軸αからの距離がオリフィス部２２から離れるに従って大きくなるように形づくられており、オリフィス部２２から離れるに従って流体通路８の略鼓形状の流体通路部分１１の出口７側の円筒面の内径よりも大きな外径を有するようになっている。上記オリフィス部材３を、流体通路部分１１の出口７側の円筒面に押し込んだとき、オリフィス部材３の第２テーパ部２５と本体１の流体通路部分１１の出口７側の円筒面の間には大きな静摩擦力が生じるようになっている。このことによって、オリフィス部材３を本体１に確実に固定することができる。
【００２７】
尚、詳述しないが、参照番号１５は弁蓋を示し、参照番号１８はキャップを示し、参照番号１９はフレアナットを示している。上記弁蓋１５は、外部からごみ等が侵入するのを防止している。また、上記キャップ１８は、閉鎖弁を回路に設置する前にごみが流体通路８に侵入するのを防止しており、フレアナット１９は、本体１の入口６に接続する図示しない配管を本体に締めつけて固定する役割を果たす。
【００２８】
上記第1実施形態の閉鎖弁によれば、上記流体通路８の弁座９よりも出口７側にオリフィス部材３を設けているので、この閉鎖弁中のオリフィス部材３を通過した流体を膨張させて減圧できる。したがって、空気調和機の回路中の閉鎖弁の外部に、別途、キャピラリまたは膨張弁等を設けることなしに、流体を膨張減圧することができるので、上記キャピラリまたは膨張弁等を省略できて、スペースを節約できる。したがって、空気調和機をコンパクトにできる。
【００２９】
また、上記第１実施形態の閉鎖弁によれば、オリフィス部材３を圧入によって簡単安価に閉鎖弁の入口と出口の間に組み込んだので、キャピラリやオリフィスをコストや工数を要するろう付けによって閉鎖弁外の回路中に設ける必要がない。したがって、空気調和機を製造するときのコストと工数を大幅に低減できる。
【００３０】
また、上記第１実施形態の閉鎖弁によれば、オリフィス部材３を、閉鎖弁の出口７に挿入して嵌め込んで設けたので、オリフィス部材を閉鎖弁の中に簡単に組み込むことができて、閉鎖弁の製造コストを低減できる。
【００３１】
尚、上記第１実施形態の閉鎖弁では、オリフィス部材３を流体通路８の弁座９よりも出口７側の１箇所に設けたが、オリフィス部材を流体通路の弁座よりも入口側の１箇所に設けても良い。また、二つのオリフィス部材を流体通路の弁座よりも入口側と出口側の２箇所に設ける等、複数のオリフィス部材を閉鎖弁の流体通路中に設けても良く、この場合、冷媒等の流体が閉鎖弁を通過するときに生じる上記流体の膨張減圧効果を増大できる。
【００３２】
また、上記第１実施形態の閉鎖弁では、本体１とオリフィス部材３とを別部材としたが、本体とオリフィス部材とを一体部材にして、本体の一部にオリフィスを形成しても良い。
【００３３】
また、上記第１実施形態の閉鎖弁では、本体１の流体通路８は、断面Ｌ字状であったが、流体通路は、流体通路に弁体を挿入できる形状であれば、直線形状等どのような形状であっても良い。
【００３４】
また、上記第１実施形態の閉鎖弁では、本体１の弁座９に接触する弁体２の部分をテーパ面８にしたが、本体の弁座に接触する弁体の部分は、先細りの形状であれば良く、例えば、本体の弁座に接触する弁体の部分を球面等の形状にしても良い。
【００３５】
また、上記第１実施形態の閉鎖弁では、本体１と弁体２を黄銅製とし、オリフィス部材３をステンレス製としたが、本体と弁体を黄銅以外の金属で形成しても良く、オリフィス部材をステンレス以外の金属で形成しても良い。
【００３６】
また、上記第１実施形態の閉鎖弁では、本体１の一部を弁座７にしたが、本体の弁座を、別体の部材、例えば、ゴム等の弾性材質で形成しても良い。
【００３７】
また、上記第１実施形態の閉鎖弁では、オリフィス部材３を流体通路８の弁座９よりも出口７側の１箇所に設けたが、二つのオリフィス部材を二枚重ねにして流体通路の弁座よりも出口側に設けても良い。また、入口側にオリフィス部材を二枚重ねに設けても良い。
【００３８】
また、上記第１実施形態の閉鎖弁では、この発明の閉鎖弁を空気調和機に適用したが、この発明の閉鎖弁を冷蔵庫等の冷凍装置に適用しても良い。
【００３９】
（第２実施形態）
図２に、この発明の第２実施形態の閉鎖弁の断面図を示す。第２実施形態の閉鎖弁は、流体通路４８の出口４７側に嵌め込んだ部材３３をオリフィス部材であるオリフィス部３５とフィルタ部材であるフィルタ部４２で構成して、フィルタ付オリフィス部材３３にした点と、本体４１のＬ字状の流体通路４８の入口４６側に断面を小さくしてオリフィス４５を形成し、本体４１の一部をオリフィス部材４９とした点と、断面Ｌ字状の流体通路４８の入口４６と屈曲部の間に段部５９を形成して、フィルタ部材５０のリング５１の弁体２側の端面をこの段部５９に接触させた状態で、フィルタ部材５０のリング５１の入口４６側の端面を押圧部材５５によって弁体２の方向に押し込んで、フィルタ部材５０を本体４１に固定した点が第１実施形態の閉鎖弁と異なる。
【００４０】
第２実施形態の閉鎖弁では、第１実施形態の閉鎖弁の構成部と同一構成部には同一参照番号を付して説明を省略する。
【００４１】
上記フィルタ付オリフィス部材３３のオリフィス部３５は、第１実施形態の閉鎖弁のオリフィス部材３と同一の形状を有している。また、上記フィルタ付オリフィス部材３３のフィルタ部４２は、オリフィス部材３の出口４７側の端面に取り付けられたリング４３と、このリング４３の出口４７側の端面に取り付けられた金網製のフィルタ４４とから成る。上記フィルタ部４２は、流体と共に上流から流れてくるゴミがフィルタ付オリフィス部材３３のオリフィス部３５やオリフィス部材４９に詰まったり、熱交換器に侵入して熱交換器の熱効率が下がったり、圧縮機が故障したりするのを防止している。
【００４２】
一方、上記フィルタ部材５０は、本体４１の段部と接触する位置に配置されるリング５１と、このリング５１の入口４６側の端面の内径側に取り付けられた金網製のフィルタ５２とから成る。このフィルタ部材５０は、第２実施形態の閉鎖弁を備えた空気調和機の機能を、例えば冷房から暖房（または、暖房から冷房）に代えて流体の流れが逆になったときに、上流から流れてくるゴミを捕獲するのに使用する。
【００４３】
また、上記押圧部材５５の外側側面は、流体通路の入口４６付近の形状、本体４１の入口４６側の端面形状、および、キャップ１８の内面形状に適合する形状を有している。上記押圧部材５５の弁体２側の端面が上記リング５１の入口４６側の端面の外径側を押圧している状態で、押圧部材５５の外側側面と、本体４１の流体通路の入口４６付近の側面および本体４１の入口４６側の端面とを固定している。尚、参照番号５６はＯリングである。Ｏリング５６は本体４１の入口４６側の端面と押圧部材ア５５の間をシールして、流体が本体４１の流体通路４８から閉鎖弁の外に漏れるのを防止している。
【００４４】
上記第２実施形態の閉鎖弁によれば、流体通路３８の入口４６側にフィルタ部材５０を設けると共に、流体通路の出口４７側のフィルタ付オリフィス部材３３にフィルタ部４２を設けたので、空気調和機の冷暖によって流体の流れる方向が変わっても、上流から流体と共に流れてくるごみをこのフィルタ部材５０およびフィルタ部４２で捕獲できる。したがって、ごみがフィルタ付オリフィス部材３３のオリフィス部３５やオリフィス部材４９に詰まったり、圧縮機が故障したりするのを防止できる。
【００４５】
空気調和機の熱交換器の熱効率を向上でき、かつ、空気調和機の熱交換器の故障を防止できる。
【００４６】
また、上記第２実施形態の閉鎖弁によれば、流体通路４８の出口４７側のフィルタ付オリフィス部材３３をオリフィス部３５とフィルタ部４２で構成して、オリフィスとフィルタ４４を一体部材に形成したので、フィルタを閉鎖弁の中に簡単に組み込むことができる。したがって、流体通路４８の出口４７側のフィルタ４４を閉鎖弁中に設置するときの工程を低減できて、フィルタを閉鎖弁中に設置するときのコストを低減できる。
【００４７】
尚、上記第２実施形態の閉鎖弁では、フィルタ部材５０のフィルタ５２およびフィルタ付オリフィス部材３３のフィルタ部４２のフィルタ４４を金網で形成したが、これらのフィルタをコットンやポリエステル等の繊維織物や焼結金属等で形成しても良い。
【００４８】
また、上記第２実施形態の閉鎖弁では、流体通路４８の出口側４７のフィルタ付オリフィス部材３３をオリフィス部３５とフィルタ部４２で構成して、オリフィスとフィルタ４４を一体部材に形成したが、流体通路の出口側に、オリフィス部材と、このオリフィス部材と別部材のフィルタ部材を設けるようにしても良い。
【００４９】
また、上記第２実施形態の閉鎖弁では、流体通路４８の入口側４６に、オリフィス部材４９とこのオリフィス部材４９と別部材のフィルタ部材５１を配置したが、流体通路の入口側に、オリフィス部とフィルタ部を有する焼結金属等でできた一体部材を配置しても良い。
【００５０】
また、上記第２実施形態の閉鎖弁では、流体通路４８の入口４６側のオリフィス部材４９は、本体４１の一部であったが、オリフィス部材は、本体と別部材であっても良い。
【００５１】
また、上記第２実施形態の閉鎖弁では、フィルタ４４,５２を流体通路４８の入口４６側と出口４７側の２箇所に設けたが、フィルタを、流体通路中の１箇所に設けるようにしても良い。また、オリフィス部３５およびオリフィス部材４９を流体通路４８の入口４６側と出口４７側の２箇所に設けたが、オリフィスは、流体通路の入口側と出口側の少なくと一方に設ければ良い。
【００５２】
また、上記第２実施形態の閉鎖弁では、押圧部材５５を本体４１に溶接によって固定したが、キャップを取り外して図示しない空気調和機の回路の配管を押圧部材とフレアナットの間に挿入した後、フレアナットを弁体の方へ締め付けることによって押圧部材を本体に固定しても良い。
【００５３】
また、上記第２実施形態の閉鎖弁では、押圧部材５５を閉鎖弁中に設けたが、この発明の閉鎖弁は、押圧部材を有さないような構造であっても良い。
【００５４】
また、上記第２実施形態の閉鎖弁では、この発明の閉鎖弁を空気調和機に適用したが、この発明の閉鎖弁を冷蔵庫等の冷凍装置に適用しても良い。
【００５５】
また、上記第２実施形態の閉鎖弁では、オリフィス部材であるフィルタ付オリフィス部材３３のオリフィス部３５を流体通路４８の弁座９よりも出口４７側の１箇所に設けたが、例えば、フィルタ付オリフィス部材より弁座側に更なるオリフィス部材を設ける等、二つのオリフィス部材を二枚重ねにして流体通路中に設けても良い。
【００５６】
また、上記第１および第２実施形態の閉鎖弁では、オリフィス部材３,３５,４９に一個のオリフィス２１,４５を設けたが、この発明の閉鎖弁が備えるオリフィス部材に複数個のオリフィスを設けても良い。
【００５７】
尚、図示しないが、空気調和機の冷媒回路中にこの発明の閉鎖弁を配置すると、通常メンテナンス時等に使用する閉鎖弁に膨張手段の機能を付加することができる。すなわち、図示しないが、圧縮機と、四路切換弁と、室外熱交換器と、この発明の閉鎖弁と、室内熱交換器とを順次接続して空気調和機の冷媒回路を構成する。そうすると、上記閉鎖弁が、メンテナンス時に使用する本来の閉鎖弁の役目と膨張手段の役目とをするから、空気調和機が、コンパクト、かつ、安価になる。
【００５８】
【発明の効果】
以上より明らかなように、請求項１の発明の閉鎖弁によれば、閉鎖弁の弁座の少なくとも片側にオリフィス部材を設け、冷媒等の流体を膨張する機能を閉鎖弁に付加したので、この閉鎖弁を例えば空気調和機等の回路中に設置することによって、このオリフィス部材を通過した流体を膨張させて減圧できる。したがって、空気調和機等の回路中の閉鎖弁の他部に、別途キャピラリまたは膨張弁等を設けることなしに、流体を膨張減圧することができるので、上記キャピラリまたは膨張弁等を省略できて、スペースを節約でき、この閉鎖弁と備えた空気調和機等の装置をコンパクトにできる。
【００５９】
また、請求項２の発明の閉鎖弁によれば、上記弁座の両側にオリフィス部材が設けられているので、冷媒等の流体がこの閉鎖弁を通過するときに生じる流体の膨張減圧効果を増大できる。
【００６０】
また、請求項３の発明の閉鎖弁によれば、オリフィス部材を上記入口と上記出口の内の少なくとも一方に挿入して設けているので、上記オリフィス部材を閉鎖弁の中に簡単に組み込むことができて、オリフィス部材の製造コストを低減できる。
【００６１】
また、請求項４の発明の閉鎖弁によれば、上記本体の入口と出口の間にフィルタ部材が設けられているので、上記入口から流体と共に流れてくるごみをこのフィルタ部材で捕獲できてオリフィス部材の詰まり等を防止でき、この閉鎖弁を用いた空気調和機等の故障を防止できる。
【００６２】
また、請求項５の発明の閉鎖弁によれば、上記オリフィス部材と上記フィルタ部材とを一体に形成しているので、フィルタ部材を閉鎖弁の中に簡単に組み込むことができて、フィルタ部材を閉鎖弁に組み込むときのコストと工数を低減できる。
【００６３】
また、請求項６の発明の空気調和機によれば、空気調和機の閉鎖弁中にオリフィス部材を設け、この閉鎖弁を通常の閉鎖弁本来の機能の他に膨張手段として機能させているので、キャピラリまたは膨張弁を設ける必要がなくて、空気調和機をコンパクト、かつ、安価にすることができる。
【図面の簡単な説明】
【図１】図１（Ａ）は、本発明の第１実施形態の閉鎖弁の断面図であり、図１（Ｂ）は、上記第１実施形態の閉鎖弁が備えるオリフィス部材の断面図である。
【図２】本発明の第２実施形態の閉鎖弁の断面図である。
【符号の説明】
１,４１本体
２弁体
３,４９オリフィス部材
６,４６入口
７,４７出口
９弁座
２１,４５オリフィス
３３フィルタ付オリフィス部材
３５オリフィス部
４３,５１リング
４２フィルタ部
４４,５２フィルタ
５０フィルタ部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a closing valve and an air conditioner using the closing valve.
[0002]
[Prior art]
Conventionally, as an air conditioner, an indoor heat exchanger, a gas closing valve, a compressor, an outdoor heat exchanger, a manual closing valve, a capillary, and a liquid closing valve are sequentially connected in a loop to constitute a refrigerant circuit. There is. The capillary is connected to the refrigerant circuit by a joint such as a flare.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-63737 (FIG. 1)
[0004]
[Problems to be solved by the invention]
However, in the conventional air conditioner, since the capillary and the liquid closing valve are separate members, there is a problem that a large space is required for the capillary and the liquid closing valve, and the air conditioner becomes large.
[0005]
Further, when the capillary is connected to the pipe, it is necessary to use both ends of the capillary as a pipe, and there is a problem that costs and man-hours for manufacturing the air conditioner increase.
[0006]
Therefore, an object of the present invention is to provide a compact shut-off valve having a pressure reducing function that can be manufactured easily and inexpensively.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the closing valve of the invention of claim 1 comprises:
In a closing valve comprising a main body having an inlet and an outlet, a valve seat provided between the inlet and the outlet, and a valve body that contacts and separates from the valve seat,
An orifice member is provided on at least one side of the valve seat ,
A fluid passage portion connecting the inlet and the outlet is provided with a substantially drum-shaped fluid passage portion,
Before the orifice member is fitted into the main body,
The orifice member includes a disc-shaped orifice portion having an orifice, a first taper portion having a center axis substantially the same as the center axis of the orifice, and a second taper portion connected to the first taper portion. ,
The inclination of the first tapered portion from the central axis is larger than the inclination of the second tapered portion from the central axis,
In a state where the orifice member is fixed to the main body, the first tapered portion is adapted to a tapered surface of the substantially drum-shaped fluid passage portion .
[0008]
The orifice member may be a separate member from the main body, or may be a part of the main body.
[0009]
According to the closing valve of the first aspect of the present invention, an orifice member is provided on at least one side of the valve seat, and a function of expanding a fluid such as a refrigerant is added to the closing valve. By installing in a refrigerant circuit such as a machine, the fluid that has passed through the orifice member can be expanded and decompressed. Therefore, the fluid can be expanded and depressurized without providing a capillary or an expansion valve outside the closing valve in the circuit of a device such as an air conditioner. Therefore, a separate capillary or expansion valve can be omitted, space can be saved, and the air conditioner or the like can be made compact.
[0010]
According to a second aspect of the present invention, there is provided a closing valve according to the first aspect, wherein an orifice member is provided on both sides of the valve seat.
[0011]
According to the closing valve of the second aspect of the invention, since the orifice members are provided on both sides of the valve seat, the expansion and depressurization effect of the fluid generated when the fluid such as the refrigerant passes through the closing valve is increased. it can.
[0012]
According to a third aspect of the present invention, there is provided a closing valve according to the first or second aspect, wherein an orifice member is inserted into at least one of the inlet and the outlet.
[0013]
According to the closing valve of the third aspect of the invention, since the orifice member is provided by being inserted into at least one of the inlet and the outlet, the orifice member can be easily incorporated into the closing valve. As a result, the manufacturing cost of the closing valve can be reduced.
[0014]
According to a fourth aspect of the present invention, there is provided a closing valve according to any one of the first to third aspects, wherein a filter member is provided between the inlet and the outlet.
[0015]
According to the shut-off valve of the fourth aspect of the present invention, since the filter member is provided between the inlet and the outlet of the main body, foreign matter such as dust flowing together with the refrigerant from the inlet is captured by the filter member. it can. Therefore, foreign substances can be prevented from entering the orifice member, the outdoor heat exchanger, the indoor heat exchanger, and the compressor, so that a failure of the air conditioner or the like can be prevented.
[0016]
According to a fifth aspect of the present invention, there is provided a closing valve according to the fourth aspect, wherein the orifice member and the filter member are integrally formed.
[0017]
According to the closing valve of the fifth aspect of the invention, since the orifice member and the filter member are integrally formed, the filter member can be easily incorporated into the closing valve, and the filter member can be used as the closing valve. Costs and man-hours for assembly can be reduced.
[0018]
An air conditioner according to a sixth aspect of the invention is a refrigerant circuit in which a compressor, an outdoor heat exchanger, the shut-off valve according to any one of claims 1 to 5 and an indoor heat exchanger are connected. It is characterized by having.
[0019]
According to the air conditioner of the sixth aspect of the invention, an orifice member is provided in the closing valve of the air conditioner, and this closing valve functions as an expansion means in addition to the normal function of the normal closing valve. There is no need to provide capillaries or expansion valves. Therefore, the air conditioner can be made compact and inexpensive.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
[0021]
(First embodiment)
FIG. 1A shows a cross-sectional view of the closing valve of the first embodiment of the present invention. This closing valve includes, for example, a brass main body 1, a brass valve body 2, and a stainless steel orifice member 3.
[0022]
The main body 1 includes an inlet 6, an outlet 7, and a fluid passage 8 bent in an L-shaped cross section that connects the inlet 6 and the outlet 7. A valve seat 9 is formed at the bent portion of the fluid passage 8. A fluid passage portion 11 having a substantially drum shape (a cylindrical shape with a narrowed center) is provided between the bent portion of the fluid passage 8 and the outlet 7.
[0023]
On the other hand, the valve body 2 seals between the main body 1 and the valve body 2 in close contact with the threaded portion 12 screwed into the main body 1, the hexagonal hole 13 into which the hexagon wrench is inserted, and the valve seat 9 of the main body 1. And a O-ring 17 that prevents refrigerant or the like from leaking from the gap between the main body 1 and the valve body 2.
[0024]
The orifice member 3 is a separate member from the main body 1 and is fitted on the outlet 6 side of the substantially drum-shaped fluid passage portion 11 of the main body 1.
[0025]
FIG. 1B is a cross-sectional view of the orifice member 3 before fitting into the main body 1. As shown in FIG. 1B, the orifice member 3 is a lid-like annular member having a recess 20, and a disc-like orifice portion 22 having an orifice 21 and a shaft extending from the outer peripheral portion of the orifice portion 22. A cylindrical portion 23 that protrudes in the direction and has the same central axis α as the central axis α of the orifice 15, a first tapered portion 24 that continues to the cylindrical portion 23, and a second taper that continues to the first tapered portion 24. Part 25.
[0026]
The inclination of the first taper portion 24 from the central axis α is larger than the inclination of the second taper portion 25 from the central axis α. The first taper portion 24 has substantially the same shape as the tapered surface on the outlet 7 side of the fluid passage portion 11 so as to match the tapered surface on the outlet 7 side of the substantially drum-shaped fluid passage portion 11. It is shaped. On the other hand, the second taper portion 25 is formed such that the distance from the central axis α increases as the distance from the orifice portion 22 increases, and as the distance from the orifice portion 22 increases, the substantially drum-shaped fluid passage portion 11 of the fluid passage 8 is formed. It has an outer diameter larger than the inner diameter of the cylindrical surface on the outlet 7 side. When the orifice member 3 is pushed into the cylindrical surface on the outlet 7 side of the fluid passage portion 11, there is a gap between the second tapered portion 25 of the orifice member 3 and the cylindrical surface on the outlet 7 side of the fluid passage portion 11 of the main body 1. A large static friction force is generated. As a result, the orifice member 3 can be reliably fixed to the main body 1.
[0027]
Although not described in detail, reference numeral 15 indicates a valve lid, reference numeral 18 indicates a cap, and reference numeral 19 indicates a flare nut. The valve lid 15 prevents dust and the like from entering from the outside. The cap 18 prevents dust from entering the fluid passage 8 before installing the shut-off valve in the circuit, and the flare nut 19 has a pipe (not shown) connected to the inlet 6 of the main body 1 in the main body. It plays the role of tightening and fixing.
[0028]
According to the closing valve of the first embodiment, since the orifice member 3 is provided on the outlet 7 side of the valve seat 9 of the fluid passage 8, the fluid that has passed through the orifice member 3 in the closing valve is expanded. Can be decompressed. Accordingly, since the fluid can be expanded and depressurized without providing a capillary or an expansion valve outside the shutoff valve in the circuit of the air conditioner, the capillary or the expansion valve can be omitted, and the space can be reduced. Can be saved. Therefore, the air conditioner can be made compact.
[0029]
Further, according to the closing valve of the first embodiment, the orifice member 3 is simply and inexpensively assembled between the inlet and the outlet of the closing valve by press-fitting. There is no need to provide it in an external circuit. Therefore, the cost and man-hour when manufacturing an air conditioner can be reduced significantly.
[0030]
Further, according to the closing valve of the first embodiment, the orifice member 3 is provided by being inserted and fitted into the outlet 7 of the closing valve, so that the orifice member can be easily incorporated into the closing valve. The manufacturing cost of the closing valve can be reduced.
[0031]
In the closing valve of the first embodiment, the orifice member 3 is provided at one location on the outlet 7 side of the valve seat 9 of the fluid passage 8, but the orifice member is 1 on the inlet side of the valve seat of the fluid passage 8. It may be provided at a location. In addition, a plurality of orifice members may be provided in the fluid passage of the closing valve, such as two orifice members provided at two locations on the inlet side and the outlet side of the valve seat of the fluid passage. Can increase the expansion and depressurization effect of the fluid that occurs when the valve passes through the closing valve.
[0032]
In the closing valve of the first embodiment, the main body 1 and the orifice member 3 are separate members. However, the main body and the orifice member may be integrated to form an orifice in a part of the main body.
[0033]
Further, in the closing valve of the first embodiment, the fluid passage 8 of the main body 1 has an L-shaped cross section. However, the fluid passage can be any linear shape as long as the valve body can be inserted into the fluid passage. Such a shape may be used.
[0034]
Moreover, in the closing valve of the said 1st Embodiment, although the part of the valve body 2 which contacts the valve seat 9 of the main body 1 was made into the taper surface 8, the part of the valve body which contacts the valve seat of a main body has a tapered shape. For example, the portion of the valve body that contacts the valve seat of the main body may be shaped like a spherical surface.
[0035]
In the closing valve of the first embodiment, the main body 1 and the valve body 2 are made of brass and the orifice member 3 is made of stainless steel. However, the main body and the valve body may be made of a metal other than brass. The member may be formed of a metal other than stainless steel.
[0036]
Moreover, in the closing valve of the said 1st Embodiment, although a part of main body 1 was used as the valve seat 7, you may form the valve seat of a main body with another members, for example, elastic materials, such as rubber | gum.
[0037]
In the closing valve of the first embodiment, the orifice member 3 is provided at one location on the outlet 7 side of the valve seat 9 of the fluid passage 8. However, the two orifice members are overlapped to form a valve seat of the fluid passage. May also be provided on the exit side. In addition, two orifice members may be provided on the inlet side.
[0038]
Moreover, in the closing valve of the said 1st Embodiment, although the closing valve of this invention was applied to the air conditioner, you may apply the closing valve of this invention to refrigeration apparatuses, such as a refrigerator.
[0039]
(Second Embodiment)
FIG. 2 shows a cross-sectional view of a closing valve according to a second embodiment of the present invention. In the closing valve of the second embodiment, the member 33 fitted on the outlet 47 side of the fluid passage 48 is composed of an orifice portion 35 that is an orifice member and a filter portion 42 that is a filter member, thereby forming an orifice member 33 with a filter. A point is formed by reducing the cross section on the inlet 46 side of the L-shaped fluid passage 48 of the main body 41 to form an orifice 45, and a part of the main body 41 is used as an orifice member 49, and a fluid passage having an L-shaped cross section A step portion 59 is formed between the inlet 46 of the 48 and the bent portion, and the end surface of the ring 51 of the filter member 50 on the valve body 2 side is in contact with the step portion 59, so that the ring 51 of the filter member 50 The point which pushed the end face by the side of the inlet 46 in the direction of the valve body 2 with the press member 55, and was fixing the filter member 50 to the main body 41 differs from the closing valve of 1st Embodiment.
[0040]
In the closing valve of the second embodiment, the same reference numerals are assigned to the same components as the components of the closing valve of the first embodiment, and the description thereof is omitted.
[0041]
The orifice portion 35 of the orifice member with filter 33 has the same shape as the orifice member 3 of the closing valve of the first embodiment. The filter portion 42 of the orifice member 33 with the filter includes a ring 43 attached to the end face of the orifice member 3 on the outlet 47 side, and a wire mesh filter 44 attached to the end face of the ring 43 on the outlet 47 side. Consists of. The filter unit 42 is configured such that dust flowing from the upstream together with the fluid is clogged in the orifice unit 35 and the orifice member 49 of the filter-equipped orifice member 33 or enters the heat exchanger to reduce the heat efficiency of the heat exchanger. Is prevented from malfunctioning.
[0042]
On the other hand, the filter member 50 includes a ring 51 arranged at a position in contact with the stepped portion of the main body 41 and a wire mesh filter 52 attached to the inner diameter side of the end surface of the ring 51 on the inlet 46 side. The filter member 50 functions as an air conditioner including the closing valve of the second embodiment, for example, when the flow of fluid is reversed from cooling to heating (or from heating to cooling). Used to capture incoming garbage.
[0043]
Further, the outer side surface of the pressing member 55 has a shape that matches the shape of the fluid passage near the inlet 46, the end surface shape of the main body 41 on the inlet 46 side, and the inner surface shape of the cap 18. In the state where the end surface of the pressing member 55 on the valve body 2 side presses the outer diameter side of the end surface on the inlet 46 side of the ring 51, the outer side surface of the pressing member 55 and the vicinity of the inlet 46 of the fluid passage of the main body 41. And the end face of the main body 41 on the inlet 46 side are fixed. Reference numeral 56 is an O-ring. The O-ring 56 seals between the end face on the inlet 46 side of the main body 41 and the pressing member 55 to prevent the fluid from leaking from the fluid passage 48 of the main body 41 to the outside of the closing valve.
[0044]
According to the closing valve of the second embodiment, the filter member 50 is provided on the inlet 46 side of the fluid passage 38 and the filter portion 42 is provided on the orifice member 33 with filter on the outlet 47 side of the fluid passage 38. Even if the flow direction of the fluid changes due to cooling and heating of the machine, the dust flowing together with the fluid from the upstream can be captured by the filter member 50 and the filter portion 42. Therefore, it is possible to prevent dust from clogging the orifice portion 35 and the orifice member 49 of the filter-equipped orifice member 33 and failure of the compressor.
[0045]
The heat efficiency of the heat exchanger of the air conditioner can be improved, and the failure of the heat exchanger of the air conditioner can be prevented.
[0046]
Further, according to the closing valve of the second embodiment, the orifice member with filter 33 on the outlet 47 side of the fluid passage 48 is constituted by the orifice portion 35 and the filter portion 42, and the orifice and the filter 44 are formed as an integral member. Thus, the filter can be easily incorporated into the closing valve. Therefore, the process for installing the filter 44 on the outlet 47 side of the fluid passage 48 in the closing valve can be reduced, and the cost for installing the filter in the closing valve can be reduced.
[0047]
In the closing valve of the second embodiment, the filter 52 of the filter member 50 and the filter 44 of the filter portion 42 of the filter-equipped orifice member 33 are formed of a wire mesh. You may form with a sintered metal etc.
[0048]
In the shutoff valve of the second embodiment, the orifice member with filter 33 on the outlet side 47 of the fluid passage 48 is constituted by the orifice part 35 and the filter part 42, and the orifice and the filter 44 are formed as an integral member. An orifice member and a filter member separate from the orifice member may be provided on the outlet side of the fluid passage.
[0049]
In the closing valve of the second embodiment, the orifice member 49 and the filter member 51, which is a separate member from the orifice member 49, are arranged on the inlet side 46 of the fluid passage 48, but the orifice portion is arranged on the inlet side of the fluid passage. And an integral member made of sintered metal or the like having a filter portion.
[0050]
In the closing valve of the second embodiment, the orifice member 49 on the inlet 46 side of the fluid passage 48 is a part of the main body 41, but the orifice member may be a separate member from the main body.
[0051]
In the closing valve of the second embodiment, the filters 44 and 52 are provided at two locations on the inlet 46 side and the outlet 47 side of the fluid passage 48. However, the filter is provided at one location in the fluid passage. Also good. Further, although the orifice portion 35 and the orifice member 49 are provided at two locations on the inlet 46 side and the outlet 47 side of the fluid passage 48, the orifice may be provided at least on one side of the inlet side and the outlet side of the fluid passage.
[0052]
Further, in the shutoff valve of the second embodiment, the pressing member 55 is fixed to the main body 41 by welding. However, after the cap is removed and the piping of the air conditioner circuit (not shown) is inserted between the pressing member and the flare nut. The pressing member may be fixed to the main body by tightening the flare nut toward the valve body.
[0053]
Moreover, in the closing valve of the said 2nd Embodiment, although the pressing member 55 was provided in the closing valve, the structure which does not have a pressing member may be sufficient as the closing valve of this invention.
[0054]
Moreover, in the closing valve of the said 2nd Embodiment, although the closing valve of this invention was applied to the air conditioner, you may apply the closing valve of this invention to refrigeration apparatuses, such as a refrigerator.
[0055]
In the closing valve of the second embodiment, the orifice portion 35 of the orifice member 33 with a filter, which is an orifice member, is provided at one location on the outlet 47 side of the valve seat 9 of the fluid passage 48. Two orifice members may be overlapped and provided in the fluid passage, for example, a further orifice member may be provided on the valve seat side from the orifice member.
[0056]
In the closing valves of the first and second embodiments, the orifice members 3, 35, 49 are provided with one orifice 21, 45. However, the orifice member provided in the closing valve of the present invention is provided with a plurality of orifices. May be.
[0057]
Although not shown, if the closing valve of the present invention is arranged in the refrigerant circuit of the air conditioner, the function of the expansion means can be added to the closing valve used during normal maintenance. That is, although not shown, the refrigerant circuit of the air conditioner is configured by sequentially connecting the compressor, the four-way switching valve, the outdoor heat exchanger, the closing valve of the present invention, and the indoor heat exchanger. Then, since the closing valve functions as an original closing valve used during maintenance and as an expansion means, the air conditioner becomes compact and inexpensive.
[0058]
【The invention's effect】
As is clear from the above, according to the closing valve of the first aspect of the present invention, the orifice member is provided on at least one side of the valve seat of the closing valve, and the function of expanding the fluid such as the refrigerant is added to the closing valve. By installing the closing valve in a circuit such as an air conditioner, the fluid that has passed through the orifice member can be expanded and decompressed. Therefore, since the fluid can be expanded and depressurized without providing a separate capillary or expansion valve in the other part of the closing valve in the circuit of the air conditioner or the like, the capillary or the expansion valve can be omitted, Space can be saved, and the device such as an air conditioner provided with the shut-off valve can be made compact.
[0059]
Further, according to the closing valve of the invention of claim 2, since the orifice members are provided on both sides of the valve seat, the expansion and decompression effect of the fluid generated when the fluid such as the refrigerant passes through the closing valve is increased. it can.
[0060]
According to the closing valve of the invention of claim 3, since the orifice member is inserted and provided in at least one of the inlet and the outlet, the orifice member can be easily incorporated into the closing valve. This can reduce the manufacturing cost of the orifice member.
[0061]
According to the shutoff valve of the invention of claim 4, since the filter member is provided between the inlet and the outlet of the main body, the dust flowing together with the fluid from the inlet can be captured by the filter member, and the orifice prevents clogging member, it can be prevented malfunction of the air conditioner or the like using the closing valves.
[0062]
Further, according to the closing valve of the invention of claim 5, since the orifice member and the filter member are integrally formed, the filter member can be easily incorporated into the closing valve, and the filter member Costs and man-hours for incorporating into a shut-off valve can be reduced.
[0063]
According to the air conditioner of the sixth aspect of the invention, an orifice member is provided in the closing valve of the air conditioner, and this closing valve functions as an expansion means in addition to the normal function of the normal closing valve. It is not necessary to provide a capillary or an expansion valve, and the air conditioner can be made compact and inexpensive.
[Brief description of the drawings]
1A is a cross-sectional view of a closing valve according to a first embodiment of the present invention, and FIG. 1B is a cross-sectional view of an orifice member provided in the closing valve of the first embodiment. is there.
FIG. 2 is a sectional view of a closing valve according to a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,41 Main body 2 Valve body 3,49 Orifice member 6,46 Inlet 7,47 Outlet 9 Valve seat 21,45 Orifice 33 Orifice member with filter 35 Orifice part 43,51 Ring 42 Filter part 44,52 Filter 50 Filter member

Claims

入口（６,４６）と出口（７,４７）と、上記入口（６,４６）と出口（７,４７）の間に設けられた弁座（９）とを有する本体（１,４１）と、上記弁座（９）に接離する弁体（２）とを備えた閉鎖弁において、
上記弁座（９）の少なくとも片側にオリフィス部材（３,３５,４９）を設け、
上記入口（６）と上記出口（７）とを接続する流体通路（８）に、略鼓形状の流体通路部分（１１）を設け、
上記オリフィス部材（３ , ３５ , ４９）が、上記本体（１ , ４１）に嵌め込まれる前において、
上記オリフィス部材（３ , ３５ , ４９）は、オリフィス（２１）を有する円板状のオリフィス部（２２）と、上記オリフィス（２１）の中心軸（α）と略同一の中心軸を有する第１テーパ部（２４）と、この第１テーパ部（２４）に連なる第２テーパ部（２５）とを有し、
上記第１テーパ部（２４）の上記中心軸（α）からの傾きは、上記第２テーパ部（２５）の上記中心軸（α）からの傾きよりも大きくなっており、
上記オリフィス部材（３ , ３５ , ４９）が上記本体（１ , ４１）に固定されている状態で、上記第１テーパ部（２４）は、上記略鼓状の流体通路部分（１１）のテーパ面に適合していることを特徴とする閉鎖弁。A main body (1, 41) having an inlet (6, 46) and an outlet (7, 47), and a valve seat (9) provided between the inlet (6, 46) and the outlet (7, 47); In the closing valve provided with the valve body (2) contacting and separating from the valve seat (9),
An orifice member (3, 35, 49) is provided on at least one side of the valve seat (9) ,
A fluid passage portion (11) having a substantially drum shape is provided in the fluid passage (8) connecting the inlet (6) and the outlet (7),
Before the orifice member (3 , 35 , 49) is fitted into the main body (1 , 41),
The orifice member (3 , 35 , 49) includes a disc-shaped orifice part (22) having an orifice (21) and a first axis having a central axis substantially the same as the central axis (α) of the orifice (21). A taper portion (24) and a second taper portion (25) connected to the first taper portion (24);
The inclination of the first taper part (24) from the central axis (α) is larger than the inclination of the second taper part (25) from the central axis (α),
In a state where the orifice members (3 , 35 , 49) are fixed to the main body (1 , 41), the first tapered portion (24) is a tapered surface of the substantially drum-shaped fluid passage portion (11). A shut-off valve characterized by conforming to

請求項１に記載の閉鎖弁において、
上記弁座（９）の両側にオリフィス部材（３５,４９）を設けたことを特徴とする閉鎖弁。The shut-off valve according to claim 1,
An orifice valve (35, 49) provided on both sides of the valve seat (9).

請求項１または２に記載の閉鎖弁において、
上記入口（６,４６）と上記出口（７,４７）の内の少なくとも一方に、オリフィス部材（３,３５）を挿入して設けたことを特徴とする閉鎖弁。The shut-off valve according to claim 1 or 2,
A shut-off valve, wherein an orifice member (3, 35) is inserted into at least one of the inlet (6, 46) and the outlet (7, 47).

請求項１乃至３のいずれか１つに記載の閉鎖弁において、
上記入口（４６）と出口（４７）との間にフィルタ部材（４２,５０）を設けたことを特徴とする閉鎖弁。The closing valve according to any one of claims 1 to 3,
A closing valve characterized in that a filter member (42, 50) is provided between the inlet (46) and the outlet (47).

請求項４に記載の閉鎖弁において、
上記オリフィス部材（３５）と上記フィルタ部材（４２）とを一体に形成したことを特徴とする閉鎖弁。The shut-off valve according to claim 4,
The closing valve characterized in that the orifice member (35) and the filter member (42) are integrally formed.

圧縮機と、室外熱交換器と、請求項１乃至５のいずれか１つに記載の閉鎖弁と、室内熱交換器とを接続した冷媒回路を備えることを特徴とする空気調和機。 An air conditioner comprising a refrigerant circuit connecting a compressor, an outdoor heat exchanger, the shut-off valve according to any one of claims 1 to 5, and an indoor heat exchanger.