JP3608231B2

JP3608231B2 - Connection method and apparatus for leakage inspection of heat exchanger and heat exchanger used therefor

Info

Publication number: JP3608231B2
Application number: JP26682494A
Authority: JP
Inventors: 恵津夫長谷川; 聡也長澤
Original assignee: Denso Corp
Current assignee: Denso Corp
Priority date: 1994-10-31
Filing date: 1994-10-31
Publication date: 2005-01-05
Anticipated expiration: 2020-01-05
Also published as: JPH08128759A

Abstract

PURPOSE: To facilitate the connection of a coupling even if a connecting member is mounted near the side of a heat exchanger body. CONSTITUTION: A connecting member 52 in which an inlet 54 and an outlet 56 of refrigerant are formed to be opened in the same direction is mounted at the side plate 48 of a heat exchanger body, and an engaging hole 60 crossed with the opening direction is formed at the member 52. An engaging pin 8 which can be inserted into the hole 60 is movably provided at a coupling 66 having inserting shafts 68, 72 to be inserted to the inlet 54 and the outlet 56, and so formed that inspecting pressure fluid can be supplied to the inlet 54 via a supply hole 76.

Description

【０００１】
【産業上の利用分野】
本発明は、冷媒を循環させる冷凍サイクル中に設けられる熱交換器の漏洩を検査する際の熱交換器の漏洩検査用接続方法及びその装置及びそれに使用する熱交換器に関する。
【０００２】
【従来の技術】
従来より、図７、図８に示すように、冷凍サイクルに用いられる熱交換器では、熱交換器本体１００に取り付けられた接合部材１０２に形成された流入孔１０４から冷媒を取入れ、同じく接合部材１０２に形成された流出孔１０６から冷媒を吐出するように形成されている。
【０００３】
熱交換器本体１００は、多数のプレートがロー付け等によって積層されて構成されており、例えば、流入孔１０４から高圧のヘリウムガスを供給し、流出孔１０６を塞ぐことによって、ヘリウムガスの漏洩を検出し、ロー付け等が確実に行われたことの検査を行っている。
【０００４】
この検査の際には、図８に示すように、接合部材１０２に簡便に接合できるカップリング１０４が用いられており、このカップリング１０４には、流入孔１０４及び流出孔１０６に挿入される挿入軸部１０８，１１０が形成されている。両挿入軸部１０８，１１０には、漏れ止めのためのＯリング１１２，１１４がそれぞれ装着されると共に、カップリング１０４には、ヘリウムガスを供給する高圧ホースが装着される接続軸部１１６が形成されている。そして、接続軸部１１６及び流入孔１０４に挿入される挿入軸部１０８には供給孔１１８が形成されている。
【０００５】
一方、カップリング１０４の両側面には、それぞれ揺動可能にレバー１２０，１２２が支持されており、挿入軸部１０８，１１０を流入孔１０４及び流出孔１０６に挿入した際に、レバー１２０，１２２を揺動させると、レバー１２０，１２２の先端に形成された係合部１２４，１２６が接合部材１０２の背面に引っかかり、ヘリウムガスを供給してもカップリング１０４が外れないように構成されている。このようなカップリング１０４を用いることにより、漏洩検査の際の流入孔１０４、流出孔１０６との接続が容易に行えた。
【０００６】
【発明が解決しようとする課題】
しかしながら、こうした従来のものでは、熱交換器本体１００の側面から飛び出して接合部材１０２が取り付けられ、接合部材１０２の背面が大きく空けられているので、カップリング１０４の接続は容易になるが、熱交換器全体の設置スペースが大きくなってしまう。
【０００７】
そこで、特開平６−１８５８３１号公報にあるように、熱交換器本体の側面にその背面を空けることなく接近して接合部材が取り付けられたものも知られている。このようなものでは、接合部材の背面に空間が確保できないので、前述したカップリング１０４の係合部１２４，１２６により、カップリング１０４を接続できない。
【０００８】
そこで、接合部材に形成されているねじ孔を用いてカップリングを複数のボルトによりねじ止めして流入孔等にヘリウムガスを供給するようにしていた。その為、カップリングと接合部材との接続が簡便に行えないので、作業性が悪く、接続が煩わしいという問題があった。
【０００９】
そこで本発明は上記の課題を解決することを目的とし、接合部材が接近して取り付けられていても、カップリングの接続を容易にした熱交換器の漏洩検査用接続方法及びその装置及びそれに使用する熱交換器を提供することにある。
【００１０】
【課題を解決するための手段】
かかる目的を達成すべく、本発明は課題を解決するため次の方法をとった。即ち、冷媒を循環させる冷凍サイクル中に設けられる熱交換器に接続して検査用圧力流体を供給し、漏洩を検査する熱交換器の漏洩検査用接続方法において、熱交換器本体の側面に突出して取り付けられた接合部材には、前記熱交換器本体の側面と垂直方向に、それぞれ平行に同方向に開口して形成された流入孔と流出孔と流通孔とが形成され、前記流入孔と前記流出孔と前記流通孔とが三角形の頂点に位置するように配置されるとともに、前記接合部材の側面に前記開口方向と交差方向に形成された係合凹部が形成され、前記係合凹部は前記接合部材の側面から前記流入孔に向けて穿設され前記流入孔と前記流出孔と前記流通孔との間の三角形の中に達している孔であって、前記係合凹部の両側にそれぞれが位置するように前記流出孔と前記流通孔とが配置されており、前記流入孔と前記流出孔と前記流通孔とに、カップリングから平行に突出形成された挿入軸部をそれぞれ挿入し、次に、前記接合部材に前記開口方向と交差方向に形成された係合凹部に、前記カップリングに前記挿入軸部の軸方向と直交する方向に移動可能に設けられた単一の係合部材を移動させて挿入し、前記挿入軸部に形成された供給孔を介して前記流入孔又は前記流出孔に前記検査用圧力流体を供給することを特徴とする冷房装置用熱交換器の漏洩検査用接続方法がそれである。
【００１２】
また、かかる目的を達成すべく、本発明は課題を解決するための手段として次の構成をとった。即ち、冷媒を循環させる冷凍サイクル中に設けられる熱交換器に接続して検査用圧力流体を供給し、漏洩を検査する熱交換器の漏洩検査用接続装置において、前記冷媒の流入孔と流出孔と流通孔とが熱交換器本体の側面と垂直方向に、それぞれ平行に同方向に開口して形成され、前記流入孔と前記流出孔と前記流通孔とが三角形の頂点に位置するように配置された接合部材を前記熱交換器本体の側面に突出して取り付けると共に、前記接合部材の側面から前記流入孔に向けて穿設され前記流入孔と前記流出孔と前記流通孔との間の三角形の中に達している孔であって、前記開口方向と交差する係合凹部を前記接合部材の側面に形成し、前記係合凹部の両側にそれぞれが位置するように前記流出孔と前記流通孔とが配置されており、前記流入孔と前記流出孔と前記流通孔とにそれぞれ挿入される挿入軸部が平行に突出形成されたカップリングに前記係合凹部に挿入可能な単一の係合部材を前記挿入軸部の軸方向と直交する方向に移動可能に設け、前記挿入軸部に形成した供給孔を介して前記流入孔又は前記流出孔に前記検査用圧力流体を供給可能に形成したことを特徴とする熱交換器の漏洩検査用接続装置の構成がそれである。
【００１３】
更に、前記熱交換器は、前記冷媒と外気との間で熱交換を行う蒸発部と、流入する前記冷媒と前記蒸発部を通過した前記冷媒との間で熱交換を行う熱交換部とを備えている構成でもよい。あるいは、前記係合凹部は、前記開口方向と直交して形成された係合孔である構成でもよく、前記係合部材は、前記カップリングに摺動可能に支持された係合ピンである構成でもよい。
【００１５】
更に、かかる目的を達成すべく、本発明は課題を解決するため次の構成をとった。即ち、冷媒を循環させる冷凍サイクル中に設けられる熱交換器であって、検査用圧力流体が供給されて漏洩を検査される熱交換器において、熱交換器本体の側面に突出して取り付けられ、前記冷媒の流入孔と流出孔と流通孔とが前記熱交換器本体の側面と垂直方向に、それぞれ平行に同方向に開口して形成され、さらに前記流入孔と前記流出孔と前記流通孔とが三角形の頂点に位置するように配置された接合部材を備え、前記流入孔と前記流出孔と前記流通孔とに挿入される３つの挿入軸部を備えて前記検査用圧力流体を供給するカップリングに前記挿入軸部の軸方向と直交する方向に移動可能に設けられた単一の係合部材が挿入され前記カップリングが前記結合部材から外れないように係合する係合凹部が、前記接合部材の側面に、前記接合部材の側面から前記流入孔に向けて穿設され、前記流入孔と前記流出孔と前記流通孔との間の三角形の中に達して形成されている孔であって、前記係合凹部の両側にそれぞれが位置するように前記流出孔と前記流通孔とが配置されていることを特徴とする熱交換器がそれである。
【００１６】
【作用】
前記方法の熱交換器の漏洩検査用接続方法は、カップリングの挿入軸部を接合部材の流入孔と流出孔と流通孔とに挿入し、カップリングの単一の係合部材を移動して接合部材の係合凹部に挿入して、カップリングと接合部材を接続する。挿入軸部を流入孔と流出孔と流通孔とに平行に挿入することによって、カップリングは、挿入軸部の軸方向にのみ移動できるが、係合凹部に係合部材を挿入することにより、検査用圧力流体が供給孔を介して供給されても、カップリンクは外れない。
【００１７】
また、前記構成を有する熱交換器の漏洩検査用接続装置は、カップリングの挿入軸部を接合部材の流入孔と流出孔と流通孔とに平行に挿入すると、カップリングは挿入軸部の径方向の移動が規制され、カップリングの単一の係合部材を移動して接合部材の係合凹部に挿入すると軸方向の移動も規制されて、カップリングと接合部材が接続され、検査用圧力流体が供給孔を介して供給されても、カップリングは外れない。
【００１８】
更に、前記構成を有する熱交換器は、カップリングの挿入軸部を接合部材の流入孔と流出孔と流通孔に平行に挿入すると、カップリングは挿入軸部の径方向の移動が規制され、カップリングの単一の係合部材を移動して接合部材の係合凹部に挿入すると軸方向の移動も規制されて、カップリングと接合部材が接続され、検査用圧力流体が供給孔を介して供給されても、カップリングは外れない。
【００１９】
【実施例】
以下本発明の実施例を図面に基づいて詳細に説明する。
先ず、本実施例の冷凍サイクルについて説明すると、図５に示すように、車両用に適用された場合にはコンプレッサ１は図示しない内燃機関で回転駆動され、コンプレッサ１はガス状の冷媒を圧縮して凝縮器２に送り、凝縮器２はこの冷媒を外部の空気により冷却して液状の冷媒としてレシーバ４に送るように接続されている。
【００２０】
レシーバ４は冷媒を一時蓄えると共に、冷媒中の塵や水分を取り除くものである。そして、レシーバ４を出た冷媒は、膨張弁６に送られ、膨張弁６は、送られてきた冷媒を減圧させるものである。また、この膨張弁６は、その開度を調節可能なもので、後述する熱交換器１６の下流側に設けられた感温筒８を備え、熱交換器１６の下流側の冷媒温度が上昇すると、感温筒８内の圧力が上昇し、即ち冷房負荷が増加すると、冷媒の量を大きくするように開度が調節されるよう構成されている。
【００２１】
前記膨張弁６から出た冷媒は、熱交換器１６に送られた後、ガス状の冷媒となってコンプレッサ１に吸い込まれるように接続されている。熱交換器１６は、蒸発部１８と熱交換部２０とを備えており、蒸発部１８は蒸発部１８内を通る冷媒と、車室内に供給される空気との間で熱交換が行われるように構成されている。
【００２２】
一方、熱交換部２０は、前記膨張弁６と蒸発部１８とを連通する被冷却流路２８を備え、この被冷却流路２８の下流側には第１絞り３０が形成されている。また、一端が蒸発部１８の出口側に接続された冷却流路３２を備えており、冷却流路３２の他端は排出流路３６に接続されている。そして、熱交換部２０では、第１絞り３０の上流側の被冷却流路２８と冷却流路３２との冷媒の間で、熱交換が可能に構成されている。排出流路３６は、冷却流路３２を通過した冷媒をコンプレッサ１に導出するように接続されている。
【００２３】
更に、膨張弁６と熱交換部２０との間の被冷却流路２８に、バイパス流路３８の一端が接続されて分岐されており、このバイパス流路３８の他端は、第１絞り３０よりも下流側の被冷却流路２８に接続されて合流されている。また、バイパス流路３８には、第２絞り４０が介装されている。
【００２４】
次に、前述した熱交換器１６の構成について図１〜４によって説明する。
図３、図４に示すように、熱交換器１６は、コアプレート４２がフィン４４を挟んで複数積層されて蒸発部１８が形成されており、第１、第２の側板４６，４８の間に波型の凹凸が多数形成されたプレート５０が積層されて熱交換部２０が形成されている。尚、本実施例では、この蒸発部１８及び熱交換部２０により熱交換器本体２１を構成しているが、熱交換部２０を備えていないものでは、蒸発部１８が熱交換器本体２１を構成する。
【００２５】
第２の側板４８には、接合部材５２が取り付けられており、接合部材５２の正面には被冷却流路２８に接続された流入孔５４と、冷却流路３２に接続された流出孔５６と、バイパス流路３８に接続された流通孔５８とが第２の側板４８と垂直方向に、それぞれ平行に同方向に開口して形成されている。図４に示すように、本実施例では、接合部材５２の周囲には、第２の側板４８と接合部材５２の背面との間に、僅かな隙間△ｔが開けられ、接近して取り付けられている。尚、接合部材５２の全面が第２の側板４８に密着して取り付けられていても実施可能である。
【００２６】
また、図１に示すように、この流入孔５４と流出孔５６との開口形成方向と垂直に、接合部材５２の側面には係合凹部としての係合孔６０が穿設されている。そして、流入孔５４及び流出孔５６と同方向に、複数のねじ孔６１〜６３が螺刻されており、このねじ孔６１〜６３は、膨張弁６や排出流路３６との接続の際に、図示しない接続部材の取付に用いられる。尚、本実施例では係合凹部を係合孔６０により構成したが、これに限らず、溝や切欠あるいは段部等により構成してもよい。
【００２７】
図２に図示されるように、接合部材５２の正面には、流出孔５６と流通孔５８とが並べて配置されている。流入孔５４は、流出孔５６と流通孔５８との間であって、下側に配置されている。図２に図示されるように、流入孔５４と、流出孔５６と、流通孔５８とは、三角形の頂点に位置するように配置されている。係合孔６０は、流出孔５６と流通孔５８との間に位置している。係合孔６０は、流入孔５４と、流出孔５６と、流通孔５８との間の三角形の中に達している。係合孔６０は、流出孔５６と流通孔５８との間に位置して、上側から下側へ向けて延びている。係合孔６０と流入孔５４とは並べて配置され、係合孔６０の両側にそれぞれが位置するように流出孔５６と流通孔５８とが配置される。
【００２８】
一方、カップリング６６には、流入孔５４、流出孔５６、流通孔５８にそれぞれ挿入可能な挿入軸部６８，７０，７２（挿入軸部７０については図６参照）が平行に突出形成されており、各挿入軸部６８，７０，７２にはそれぞれＯリング７４〜７６（Ｏリング７５については図６参照）が装着されて、各挿入軸部６８，７０，７２を流入孔５４、流出孔５６、流通孔５８に挿入した際の漏れ止めが図られている。
【００２９】
また、カップリング６６には、挿入軸部６８，７０，７２と反対側に検査用圧力流体、例えば、高圧のヘリウムガスが供給されるホースが接続される接続軸部７４が突出形成されている。そして、この接続軸部７４と流入孔５４に挿入される挿入軸部７０とには、供給孔７６が貫設されている。尚、供給孔７６は接続軸部７４と流出孔５６に挿入される挿入軸部７２とに貫設してもよい。
【００３０】
更に、カップリング６６には、各挿入軸部６８，７０，７２をそれぞれ流入孔５４、流出孔５６、流通孔５８に挿入した際に、係合孔６０に挿入可能な係合ピン７８が、挿入軸部６８，７０，７２の軸方向と直交する方向に移動可能に支持されている。
【００３１】
次に、前述した本実施例の熱交換器の漏洩検査用接続装置の作動について説明する。
まず、各挿入軸部６８，７０，７２をそれぞれ流入孔５４、流出孔５６、流通孔５８に挿入する。そして、係合ピン７８を移動させて係合孔６０内に挿入する。これにより、接合部材５２とカップリング６６とが簡便に接続される。次に、接続軸部７４に接続したホースから高圧のヘリウムガス等の検査用圧力流体を、供給孔７６を介して、流入孔５４から供給する。
【００３２】
これにより、熱交換部２０の被冷却流路２８から蒸発部１８に検査用圧力流体が供給されると共に、蒸発部１８から冷却流路３２に、また、被冷却流路２８からバイパス流路３８にも検査用圧力流体が供給される。この熱交換器１６を密閉した槽の中にいれて、槽内の検査用圧力流体、例えばヘリウムガスを検出することにより、熱交換器１６の漏洩を検出できる。
【００３３】
また、高圧の検査用圧力流体を供給したことにより、カップリング６６に外力が作用するが、挿入軸部６８，７０，７２により、挿入軸部６８，７０，７２の径方向の移動が規制されると共に、係合ピン７８により挿入軸部６８，７０，７２の軸方向の移動が規制されるので、カップリング６６が接合部材５２から外れることがない。従って、係合孔６０と係合ピン７８とを設ける簡単な構成で、しかも、係合ピン７８を移動させる簡単な操作でカップリング６６と接合部材５２とを接続することができる。カップリングを外す場合は前述したと逆の動作を行えばよい。
【００３４】
次に、前述したカップリング６６の係合ピン７８の操作をより容易にした第２実施例のカップリングの構成について図６によって説明する。尚、前述した実施例と同じ部材については同一番号を付して詳細な説明を省略する。
カップリング６６には、レバー８０が揺動可能に支持されており、レバー８０の先端８２は、レバー８０を揺動させた際に係合ピン７８に当接して係合ピンを移動させるように構成されている。これにより、レバー８０を操作することによって、係合ピン７８を摺動させて係合孔６０に挿入することが容易にできる。尚、係合ピン７８を用いることなく、レバー８０の先端８２を直接係合孔６０に挿入する構成としても実施可能である。
【００３５】
以上本発明はこの様な実施例に何等限定されるものではなく、本発明の要旨を逸脱しない範囲において種々なる態様で実施し得る。
【００３６】
【発明の効果】
以上詳述したように本発明によると、熱交換器本体の側面に接近して接合部材を取り付けて、設置スペースを小さくした熱交換器で、接合部材と熱交換器本体の側面との間に空きがなくても、漏洩検査時に簡便に接合部材とカップリングとを接続することができるという効果を奏する。
【図面の簡単な説明】
【図１】本発明の一実施例としての熱交換器の漏洩検査用接続装置の概略斜視図である。
【図２】本実施例の接合部材の拡大正面図である。
【図３】本実施例の熱交換器の斜視図である。
【図４】本実施例の熱交換器の側面に取り付けた接合部材の拡大側面図である。
【図５】本実施例の冷凍サイクルの概略構成図である。
【図６】第２実施例の熱交換器の漏洩検査用接続装置の概略斜視図である。
【図７】従来の熱交換器の斜視図である。
【図８】従来の熱交換器の漏洩検査用接続装置の概略斜視図である。
【符号の説明】
１６…熱交換器１８…蒸発部２０…熱交換部
２１，１００…熱交換器本体５２，１０２…接合部材５４，１０４…流入孔
５６，１０６…流出孔５８…流通孔６０…係合孔
６６，１０４…カップリング６８，７０，７２，１０８，１１０…挿入軸部
７６，１１８…供給孔７８…係合ピン[0001]
[Industrial application fields]
TECHNICAL FIELD The present invention relates to a connection method for leakage inspection of a heat exchanger when inspecting leakage of a heat exchanger provided in a refrigeration cycle for circulating a refrigerant, an apparatus therefor, and a heat exchanger used therefor .
[0002]
[Prior art]
Conventionally, as shown in FIGS. 7 and 8, in the heat exchanger used in the refrigeration cycle, the refrigerant is taken in from the inflow hole 104 formed in the joining member 102 attached to the heat exchanger body 100. The refrigerant is discharged from an outflow hole 106 formed in 102.
[0003]
The heat exchanger main body 100 is configured by laminating a large number of plates by brazing or the like. For example, by supplying high-pressure helium gas from the inflow hole 104 and closing the outflow hole 106, leakage of helium gas is prevented. It is detected and inspected that brazing or the like has been performed reliably.
[0004]
In this inspection, as shown in FIG. 8, a coupling 104 that can be easily joined to the joining member 102 is used. The coupling 104 is inserted into the inflow hole 104 and the outflow hole 106. Shaft portions 108 and 110 are formed. Both insertion shafts 108 and 110 are provided with O-rings 112 and 114 for preventing leakage, respectively, and the coupling 104 is formed with a connection shaft 116 to which a high-pressure hose for supplying helium gas is attached. Has been. A supply hole 118 is formed in the insertion shaft portion 108 inserted into the connection shaft portion 116 and the inflow hole 104.
[0005]
On the other hand, levers 120 and 122 are swingably supported on both side surfaces of the coupling 104. When the insertion shaft portions 108 and 110 are inserted into the inflow hole 104 and the outflow hole 106, the levers 120 and 122 are supported. The engaging portions 124 and 126 formed at the front ends of the levers 120 and 122 are caught on the back surface of the joining member 102 when the lever is swung, and the coupling 104 is not detached even when helium gas is supplied. . By using such a coupling 104, the connection with the inflow hole 104 and the outflow hole 106 at the time of leakage inspection could be easily performed.
[0006]
[Problems to be solved by the invention]
However, in such a conventional device, the joining member 102 is attached by jumping out from the side surface of the heat exchanger main body 100, and the back surface of the joining member 102 is widely opened, so that the coupling 104 can be easily connected. The installation space for the entire exchanger increases.
[0007]
Therefore, as disclosed in Japanese Patent Laid-Open No. 6-185831, there is also known one in which a joining member is attached close to the side surface of the heat exchanger main body without leaving a back surface. In such a case, since a space cannot be secured on the back surface of the joining member, the coupling 104 cannot be connected by the engaging portions 124 and 126 of the coupling 104 described above.
[0008]
Therefore, the coupling hole is screwed with a plurality of bolts using screw holes formed in the joining member, and helium gas is supplied to the inflow hole or the like. For this reason, there is a problem that the connection between the coupling and the joining member cannot be performed easily, so that the workability is poor and the connection is troublesome.
[0009]
Therefore, the present invention aims to solve the above-mentioned problems, and a connection method and apparatus for leakage inspection of a heat exchanger that facilitates connection of a coupling even when the joining members are attached close to each other and its use It is to provide a heat exchanger .
[0010]
[Means for Solving the Problems]
In order to achieve this object, the present invention takes the following method to solve the problems. That is, in a connection method for leakage inspection of a heat exchanger that supplies a pressure fluid for inspection by connecting to a heat exchanger provided in a refrigeration cycle for circulating a refrigerant and inspects for leakage, it protrudes from the side surface of the heat exchanger body. Te to the joint member attached to the sides and the vertical direction of the heat exchanger body, is flowed holes formed in parallel to the opening in the same direction respectively and outflow hole and the flow holes are formed, and the inflow hole The outflow hole and the flow hole are disposed so as to be located at the apex of a triangle, and an engagement recess formed in a direction intersecting the opening direction is formed on a side surface of the joining member, Holes drilled from the side surface of the joining member toward the inflow hole and reaching the triangle between the inflow hole, the outflow hole, and the flow hole, respectively, on both sides of the engagement recess So that the outflow hole and front are located It is arranged and through channel, said the inflow hole and the outflow hole and the flow hole, and inserting the insertion shaft portion which is parallel to protrude from the coupling respectively, then, the opening direction to the junction member A single engagement member provided in the coupling recess formed in a direction intersecting with the coupling shaft so as to be movable in a direction orthogonal to the axial direction of the insertion shaft portion is moved and inserted, and the insertion shaft This is a leakage inspection connection method for a heat exchanger for a cooling device, characterized in that the pressure fluid for inspection is supplied to the inflow hole or the outflow hole through a supply hole formed in the section.
[0012]
In order to achieve this object, the present invention has the following configuration as means for solving the problems. That is, in the connection device for leakage inspection of a heat exchanger that supplies a pressure fluid for inspection by connecting to a heat exchanger provided in a refrigeration cycle for circulating the refrigerant and inspects leakage, the inflow hole and outflow hole of the refrigerant And the flow hole are formed so as to open in the same direction parallel to the side surface of the heat exchanger body, and are arranged so that the inflow hole, the outflow hole, and the flow hole are located at the apex of the triangle. The attached joining member protrudes from the side surface of the heat exchanger body and is attached to the triangular shape between the inflow hole, the outflow hole, and the flow hole. a in which holes reach into the engaging recess intersecting the opening direction are formed on the side surface of the joining member, and the outflow hole to both sides of the engaging recess is located and said flow hole There are arranged, the inflow hole Perpendicular to the outlet hole and the distribution hole and the insertion shaft portion is the axial direction of the insertion shaft portion of a single engaging member insertable into the engaging recess in the coupling which is protruded in parallel to be respectively inserted Leakage inspection of a heat exchanger, characterized in that the pressure fluid for inspection can be supplied to the inflow hole or the outflow hole through a supply hole formed in the insertion shaft portion. That is the configuration of the connecting device for the machine.
[0013]
Furthermore, the heat exchanger includes an evaporation section that performs heat exchange between the refrigerant and outside air, and a heat exchange section that performs heat exchange between the refrigerant flowing in and the refrigerant that has passed through the evaporation section. The structure provided may be sufficient. Alternatively, the engaging recess may be an engaging hole formed orthogonal to the opening direction, and the engaging member is an engaging pin supported slidably on the coupling. But you can.
[0015]
Furthermore, in order to achieve this object, the present invention has the following configuration in order to solve the problem. That is, a heat exchanger provided in a refrigeration cycle for circulating a refrigerant, in which the inspection pressure fluid is supplied and leakage is inspected, attached to protrude from the side surface of the heat exchanger body, An inflow hole, an outflow hole, and a circulation hole for the refrigerant are formed to open in the same direction in parallel with the side surface of the heat exchanger body, and the inflow hole, the outflow hole, and the circulation hole are further formed. A coupling that includes a joining member disposed so as to be positioned at the apex of a triangle, and includes three insertion shaft portions that are inserted into the inflow hole, the outflow hole, and the flow hole, and that supplies the pressure fluid for inspection. An engaging recess that is inserted into a single engaging member movably provided in a direction orthogonal to the axial direction of the insertion shaft portion and engages so that the coupling does not come off from the coupling member, the side members, the contact Is drilled toward the side member to the inflow hole, a hole is formed reached in a triangle between the distribution hole and the inlet hole and the outflow hole, both sides of the engaging recess The heat exchanger is characterized in that the outflow hole and the flow hole are arranged so as to be located in each.
[0016]
[Action]
Connection leaking inspection of the heat exchanger of the process inserts the insertion shaft portion of the coupling to the inlet hole and the outlet hole of the joint member and the flow hole, by moving a single engagement member of a coupling It inserts in the engagement recessed part of a joining member, and connects a coupling and a joining member. By inserting the insertion shaft portion in parallel with the inflow hole, the outflow hole, and the flow hole , the coupling can move only in the axial direction of the insertion shaft portion, but by inserting the engagement member into the engagement recess, Even if the pressure fluid for inspection is supplied through the supply hole, the cup link does not come off.
[0017]
Further, the leak test connection device of a heat exchanger having a configuration, when the insertion shaft portion of the coupling between the inflow hole and the outflow hole of the joint member parallel to the insertion into the flow hole, the coupling of the insertion shaft portion diameter The movement in the direction is restricted, and when the single engaging member of the coupling is moved and inserted into the engaging recess of the joining member, the axial movement is also restricted, the coupling and the joining member are connected, and the pressure for inspection Even if the fluid is supplied through the supply hole, the coupling does not come off.
[0018]
Furthermore, in the heat exchanger having the above configuration, when the insertion shaft portion of the coupling is inserted in parallel with the inflow hole, the outflow hole, and the flow hole of the joining member, the coupling is restricted from moving in the radial direction of the insertion shaft portion, When the single engaging member of the coupling is moved and inserted into the engaging recess of the joining member, the axial movement is also restricted, the coupling and the joining member are connected, and the inspection pressure fluid is supplied via the supply hole. Even if supplied, the coupling does not come off.
[0019]
【Example】
Embodiments of the present invention will be described below in detail with reference to the drawings.
First, the refrigeration cycle of this embodiment will be described. As shown in FIG. 5, when applied to a vehicle, the compressor 1 is rotationally driven by an internal combustion engine (not shown), and the compressor 1 compresses a gaseous refrigerant. The condenser 2 is connected so that the refrigerant is cooled by external air and sent to the receiver 4 as a liquid refrigerant.
[0020]
The receiver 4 temporarily stores the refrigerant and removes dust and moisture in the refrigerant. And the refrigerant | coolant which came out of the receiver 4 is sent to the expansion valve 6, and the expansion valve 6 depressurizes the sent refrigerant | coolant. The expansion valve 6 can be adjusted in its opening degree, and includes a temperature sensing cylinder 8 provided on the downstream side of the heat exchanger 16 to be described later, and the refrigerant temperature on the downstream side of the heat exchanger 16 increases. Then, when the pressure in the temperature sensing cylinder 8 increases, that is, when the cooling load increases, the opening degree is adjusted to increase the amount of refrigerant.
[0021]
The refrigerant discharged from the expansion valve 6 is sent to the heat exchanger 16 and then connected to be sucked into the compressor 1 as a gaseous refrigerant. The heat exchanger 16 includes an evaporating unit 18 and a heat exchanging unit 20, and the evaporating unit 18 exchanges heat between the refrigerant passing through the evaporating unit 18 and the air supplied to the vehicle interior. It is configured.
[0022]
On the other hand, the heat exchanging unit 20 includes a cooled channel 28 that communicates the expansion valve 6 and the evaporation unit 18, and a first throttle 30 is formed on the downstream side of the cooled channel 28. Further, a cooling flow path 32 having one end connected to the outlet side of the evaporator 18 is provided, and the other end of the cooling flow path 32 is connected to the discharge flow path 36. The heat exchanging unit 20 is configured to be able to exchange heat between the refrigerant in the channel to be cooled 28 and the cooling channel 32 on the upstream side of the first throttle 30. The discharge flow path 36 is connected so as to lead the refrigerant that has passed through the cooling flow path 32 to the compressor 1.
[0023]
Furthermore, one end of a bypass flow path 38 is branched to the cooled flow path 28 between the expansion valve 6 and the heat exchanging unit 20, and the other end of the bypass flow path 38 is connected to the first throttle 30. It is connected and merged with the channel 28 to be cooled further downstream. A second throttle 40 is interposed in the bypass flow path 38.
[0024]
Next, the configuration of the heat exchanger 16 described above will be described with reference to FIGS.
As shown in FIGS. 3 and 4, the heat exchanger 16 includes a plurality of core plates 42 laminated with fins 44 therebetween to form an evaporation section 18, and is formed between the first and second side plates 46 and 48. The heat exchange part 20 is formed by laminating plates 50 each having a large number of corrugated irregularities formed thereon. In the present embodiment, the evaporator 18 and the heat exchanger 20 constitute the heat exchanger body 21. However, in the case where the heat exchanger 20 is not provided, the evaporator 18 replaces the heat exchanger body 21. Constitute.
[0025]
A joining member 52 is attached to the second side plate 48, and an inflow hole 54 connected to the cooled channel 28 and an outflow hole 56 connected to the cooling channel 32 are formed on the front surface of the joining member 52. The through holes 58 connected to the bypass flow path 38 are formed so as to open in the same direction in parallel with the second side plate 48 in the vertical direction. As shown in FIG. 4, in this embodiment, a slight gap Δt is opened around the joining member 52 between the second side plate 48 and the back surface of the joining member 52, and is attached close to each other. ing. Note that the present invention can be implemented even when the entire surface of the joining member 52 is attached in close contact with the second side plate 48.
[0026]
Further, as shown in FIG. 1, an engagement hole 60 as an engagement recess is formed in the side surface of the joining member 52 in a direction perpendicular to the opening formation direction of the inflow hole 54 and the outflow hole 56. A plurality of screw holes 61 to 63 are threaded in the same direction as the inflow hole 54 and the outflow hole 56, and the screw holes 61 to 63 are connected to the expansion valve 6 and the discharge flow path 36. , Used to attach a connection member (not shown). In this embodiment, the engaging recess is formed by the engaging hole 60, but the present invention is not limited to this, and it may be formed by a groove, a notch, or a stepped portion.
[0027]
As shown in FIG. 2, an outflow hole 56 and a flow hole 58 are arranged side by side on the front surface of the joining member 52. The inflow hole 54 is disposed on the lower side between the outflow hole 56 and the flow hole 58. As shown in FIG. 2, the inflow hole 54, the outflow hole 56, and the flow hole 58 are arranged so as to be located at the apex of the triangle. The engagement hole 60 is located between the outflow hole 56 and the flow hole 58. The engagement hole 60 reaches a triangle between the inflow hole 54, the outflow hole 56, and the flow hole 58. The engagement hole 60 is located between the outflow hole 56 and the flow hole 58 and extends from the upper side to the lower side. The engagement hole 60 and the inflow hole 54 are arranged side by side, and the outflow hole 56 and the flow hole 58 are disposed so as to be located on both sides of the engagement hole 60.
[0028]
On the other hand, in the coupling 66, insertion shaft portions 68, 70, 72 (see FIG. 6 for the insertion shaft portion 70) that can be inserted into the inflow hole 54, the outflow hole 56, and the flow hole 58 are formed in parallel. In addition, O-rings 74 to 76 (see FIG. 6 for the O-ring 75) are attached to the insertion shaft portions 68, 70, and 72, respectively. 56, leakage prevention when inserted into the flow hole 58 is achieved.
[0029]
Further, the coupling 66 is formed with a protruding projecting shaft 74 connected to a hose supplied with a pressure fluid for inspection, for example, high-pressure helium gas, on the side opposite to the insertion shafts 68, 70, 72. . A supply hole 76 is provided through the connection shaft portion 74 and the insertion shaft portion 70 inserted into the inflow hole 54. The supply hole 76 may be provided through the connection shaft portion 74 and the insertion shaft portion 72 inserted into the outflow hole 56.
[0030]
Further, the coupling 66 has an engagement pin 78 that can be inserted into the engagement hole 60 when the insertion shaft portions 68, 70, 72 are inserted into the inflow hole 54, the outflow hole 56, and the flow hole 58, respectively. The insertion shafts 68, 70, and 72 are supported so as to be movable in a direction orthogonal to the axial direction.
[0031]
Next, the operation of the above-described leakage inspection connecting device for a heat exchanger according to this embodiment will be described.
First, the insertion shafts 68, 70, 72 are inserted into the inflow hole 54, the outflow hole 56, and the flow hole 58, respectively. Then, the engagement pin 78 is moved and inserted into the engagement hole 60. Thereby, the joining member 52 and the coupling 66 are simply connected. Next, a pressure fluid for inspection such as high-pressure helium gas is supplied from the hose connected to the connecting shaft portion 74 through the inflow hole 54 via the supply hole 76.
[0032]
As a result, the test pressure fluid is supplied from the cooled channel 28 of the heat exchanging unit 20 to the evaporator 18, and from the evaporator 18 to the cooling channel 32, and from the cooled channel 28 to the bypass channel 38. Also, the inspection pressure fluid is supplied. Leakage of the heat exchanger 16 can be detected by placing the heat exchanger 16 in a sealed tank and detecting a test pressure fluid in the tank, for example, helium gas.
[0033]
Further, the external force acts on the coupling 66 by supplying the high-pressure test pressure fluid, but the insertion shaft portions 68, 70, 72 restrict the movement of the insertion shaft portions 68, 70, 72 in the radial direction. At the same time, since the axial movement of the insertion shaft portions 68, 70, 72 is restricted by the engagement pin 78, the coupling 66 does not come off from the joining member 52. Therefore, the coupling 66 and the joining member 52 can be connected with a simple configuration in which the engagement hole 60 and the engagement pin 78 are provided and with a simple operation of moving the engagement pin 78. When removing the coupling, the operation reverse to that described above may be performed.
[0034]
Next, the configuration of the coupling of the second embodiment in which the operation of the engaging pin 78 of the coupling 66 described above is made easier will be described with reference to FIG. Note that the same members as those in the above-described embodiment are denoted by the same reference numerals and detailed description thereof is omitted.
A lever 80 is swingably supported on the coupling 66, and the tip 82 of the lever 80 abuts on the engagement pin 78 when the lever 80 is swung to move the engagement pin. It is configured. Thus, by operating the lever 80, the engagement pin 78 can be easily slid and inserted into the engagement hole 60. It should be noted that a configuration in which the tip 82 of the lever 80 is directly inserted into the engagement hole 60 without using the engagement pin 78 is also possible.
[0035]
The present invention is not limited to such embodiments as described above, and can be implemented in various modes without departing from the gist of the present invention.
[0036]
【The invention's effect】
As described above in detail, according to the present invention, the heat exchanger main body is attached close to the side surface of the heat exchanger body, and the installation space is reduced, and between the joint member and the side surface of the heat exchanger main body. Even if there is no space, there is an effect that the joining member and the coupling can be easily connected at the time of leakage inspection.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a connection device for leakage inspection of a heat exchanger as one embodiment of the present invention.
FIG. 2 is an enlarged front view of a joining member according to the present embodiment.
FIG. 3 is a perspective view of a heat exchanger according to the present embodiment.
FIG. 4 is an enlarged side view of a joining member attached to the side surface of the heat exchanger of the present embodiment.
FIG. 5 is a schematic configuration diagram of a refrigeration cycle according to the present embodiment.
FIG. 6 is a schematic perspective view of a connection device for leakage inspection of a heat exchanger according to a second embodiment.
FIG. 7 is a perspective view of a conventional heat exchanger.
FIG. 8 is a schematic perspective view of a connection device for leakage inspection of a conventional heat exchanger.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 16 ... Heat exchanger 18 ... Evaporating part 20 ... Heat exchange part 21, 100 ... Heat exchanger main body 52, 102 ... Joining member 54, 104 ... Inflow hole 56, 106 ... Outflow hole 58 ... Flow hole 60 ... Engagement hole 66 104 ... Coupling 68, 70, 72, 108, 110 ... Insert shaft 76, 118 ... Supply hole 78 ... Engagement pin

Claims

In a connection method for leakage inspection of a heat exchanger for connecting to a heat exchanger provided in a refrigeration cycle for circulating a refrigerant and supplying a pressure fluid for inspection and inspecting leakage,
The bonding member attached to protrude to the side of the heat exchanger body, the sides and the vertical direction of the heat exchanger body, inlet holes formed in parallel to the opening in the same direction respectively and outflow hole and the flow holes Are formed such that the inflow hole, the outflow hole, and the flow hole are positioned at the apex of a triangle, and an engagement recess formed in a side surface of the joining member in a direction intersecting with the opening direction. Formed, the engagement recess is a hole that is drilled from the side surface of the joining member toward the inflow hole and reaches the triangle between the inflow hole, the outflow hole, and the flow hole, The outflow hole and the flow hole are arranged so that each is located on both sides of the engagement recess,
Inserting the insertion shaft portions formed in parallel to the coupling into the inflow hole, the outflow hole and the flow hole , respectively,
Next, a single engagement member provided in the engagement recess formed in the joining member in a direction intersecting with the opening direction so as to be movable in a direction orthogonal to the axial direction of the insertion shaft portion in the coupling A leakage inspection of a heat exchanger for a cooling apparatus, wherein the inspection pressure fluid is supplied to the inflow hole or the outflow hole through a supply hole formed in the insertion shaft portion. Connection method.

In a connection device for leakage inspection of a heat exchanger that connects to a heat exchanger provided in a refrigeration cycle for circulating a refrigerant to supply a pressure fluid for inspection and inspects for leakage,
The refrigerant inflow hole, outflow hole, and circulation hole are formed to open in the same direction in parallel with the side surface of the heat exchanger body, and the inflow hole, the outflow hole, and the circulation hole are triangular. A joining member arranged so as to be positioned at the apex of the heat exchanger protrudes from the side surface of the heat exchanger main body, and is drilled from the side surface of the joining member toward the inflow hole, and the inflow hole, the outflow hole, and the It is a hole reaching a triangle between the through hole, and an engagement recess that intersects with the opening direction is formed on a side surface of the joining member , and each is located on both sides of the engagement recess. The outflow holes and the flow holes are arranged;
A single engaging member that can be inserted into the engaging recess is coupled to a coupling in which insertion shaft portions respectively inserted into the inflow hole, the outflow hole, and the flow hole are formed to protrude in parallel. The heat exchange is provided so as to be movable in a direction perpendicular to the axial direction, and is configured to be able to supply the inspection pressure fluid to the inflow hole or the outflow hole through a supply hole formed in the insertion shaft portion. Connection device for leakage inspection of containers.

The heat exchanger includes an evaporation section that performs heat exchange between the refrigerant and outside air, and a heat exchange section that performs heat exchange between the refrigerant flowing in and the refrigerant that has passed through the evaporation section. The connection device for leak inspection of a heat exchanger according to claim 2, wherein

The connection device for leakage inspection of a heat exchanger according to claim 2 or 3, wherein the engagement recess is an engagement hole formed orthogonal to the opening direction.

5. The connection device for leakage inspection of a heat exchanger according to claim 2, wherein the engaging member is an engaging pin slidably supported by the coupling.

A heat exchanger provided in a refrigeration cycle for circulating a refrigerant, wherein the inspection pressure fluid is supplied and leakage is inspected,
It is attached to the side surface of the heat exchanger body so as to protrude, and the inflow hole, the outflow hole, and the circulation hole of the refrigerant are formed to open in the same direction in parallel with the side surface of the heat exchanger body, A joining member arranged so that the inflow hole, the outflow hole, and the flow hole are positioned at the apex of a triangle;
Three insertion shaft portions inserted into the inflow hole, the outflow hole, and the flow hole, and capable of moving in a direction orthogonal to the axial direction of the insertion shaft portion to a coupling that supplies the inspection pressure fluid. Engagement recesses that are engaged with the coupling member so that the coupling is not detached from the coupling member are inserted into the side surface of the joining member and from the side surface of the joining member to the inflow hole. Are formed so as to reach a triangle between the inflow hole, the outflow hole, and the flow hole, and the outflow holes are located on both sides of the engagement recess. A heat exchanger, wherein a hole and the flow hole are arranged .