JP3700481B2

JP3700481B2 - Heat exchanger

Info

Publication number: JP3700481B2
Application number: JP19705499A
Authority: JP
Inventors: 昭一横山; 治青柳; 智朗安藤; 浩一酒井; 仁茂木
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 1999-07-12
Filing date: 1999-07-12
Publication date: 2005-09-28
Anticipated expiration: 2019-07-12
Also published as: JP2001021284A

Description

【０００１】
【発明の属する技術分野】
本発明は、空気調和機の室内機または室外機等に用いられる熱交換装置に関するものである。
【０００２】
【従来の技術】
従来の空気調和機の室外機に用いられる熱交換装置としては特開平８−３２７１３８号公報に記載されているファンコイルユニットの構成と同様、図９に示すような構成となっているものがある。図９において1は空気調和機のファンコイルユニットで、天面から見ると略正方形で、四つの側面に沿って直線状の４列伝熱管の水・空気熱交換器２、３、４、５が配置してある。６は冷温水の入口ヘッダで、8本の枝管を経て第1の熱交換器２の第１端の内側第１列の伝熱管に接続されている。この第１の熱交換器２の内側第１列の伝熱管は他端に出て、ここで８個の９０°ベンド７を経て第２の熱交換器３の内側第１列の伝熱管に接続されている。同様にして、第３の熱交換器４、第４の熱交換器５を経た８本の伝熱管は第４の熱交換器５を出た処で８個のリターンベンド８を経て１８０°方向転換し、第４の熱交換器５の内側第２列の伝熱管に接続される。今度は逆に第４の熱交換器５から第３の熱交換器４、第２の熱交換器３、第１の熱交換器２へと各々の伝熱管に８個の９０°ベンド７を介して順に接続され、さらに同様に再びリターンベンド８を介して内側第３列へと転じ、最終的にそれぞれの熱交換器の内側第４列すなわち外側第１列を経て第１の熱交換器２の第１端に戻り冷温水出口ヘッダ９に連通する。１０はファンコイルユニットの底板、１１は４つの熱交換器の間隙を覆うケーシングで、１２は底板１０の中央に配置された軸流送風機で、プロペラの回転によって、ファンコイルユニット１内の空気を吸って、底板１０の中央下部の吹出口（図示せず）からその空気を吹き出す。
【０００３】
上記構成において外部の空気は４つの熱交換器２〜５のアルミフィンの隙間を通過してファンコイルユニットに次々に吸い込まれてくる。ここで熱交換器２〜５を通過する空気と、熱交換器の伝熱管を流れる冷水または温水との間でアルミフィンを介して熱交換が行なわれる。このようにして、ファンコイルユニットの外部の空気は、熱交換器２〜５を通過して冷却または加熱が行われ、次々と軸流送風機１２に吸い込まれ、加圧されて、吹出口から下方へ吹出される。
【０００４】
【発明が解決しようとする課題】
しかしながら、上記従来の構成では熱交換器２〜５の四つ必要で、かつそれら四つの熱交換器をベンドで接続するために多大な工数が発生し、コストアップになる。また、ベンドで接続するための四隅の空間１３が必要なため大きな本体容積となってしまう。また、この四隅の空間１３は空気が流入しないため、風量性能の低下を招いたり、偏流により騒音を上昇させるという課題を有していた。
【０００５】
本発明はこのような従来の課題を解決するものであり、空気調和機の室内機または室外機等に用いられ、熱交換器の収納性および送風特性を改善して低コストで、かつ性能を有効に活かす熱交換装置を提供することを目的とする。
【０００６】
【課題を解決するための手段】
上記課題を解決するために本発明は、機器本体内の側面に沿って二つの対称形の熱交換器を配置した熱交換器であって、二つの対称形の熱交換器は、熱交換器を構成するフィンの主平面に直交して蛇行状に連続して複数段に配置した伝熱管の冷媒流路の列数を１列もしくは複数列にするとともに伝熱管の冷媒流路の配置構成を対称形にしたものである。
【０００７】
上記構成によって、機器本体、例えば空気調和機の室内機または室外機の熱交換器を二つの熱交換器で構成して容易に組み立てられ、かつ良好な送風特性が得られるとともに、それぞれの熱交換器へ冷媒を均等に流すことができ、熱交換器の性能を有効に活かすことができる。
【０００８】
【発明の実施の形態】
本発明の請求項１に記載の発明は、機器本体内に、その４側面に沿って二つの対称形の略Ｌ字状の熱交換器を配置した熱交換装置であって、前記二つの熱交換器は、熱交換器を構成するフィンの主平面に直交して蛇行状に連続して複数段に配置した伝熱管の冷媒流路の列数を１列もしくは複数列にするとともに前記伝熱管の冷媒流路の配置構成を対称形にしたものである。
【０００９】
また本発明の請求項２に記載の発明は、略直方体の機器本体内に、その４側面に沿って二つの対称形の略Ｕ字状の熱交換器を配置した熱交換装置であって、前記二つの熱交換器は、熱交換器を構成するフィンの主平面に直交して蛇行状に連続して複数段に配置した伝熱管の冷媒流路の列数を１列もしくは複数列にするとともに前記伝熱管の冷媒流路の配置構成を対称形にしたものである。
【００１０】
これらの構成によれば、二つの対称形の略Ｌ字状または略Ｕ字状の熱交換器を機器本体内の４側面に沿って対称形に配置するだけで、熱交換器を組み立てることができるとともに、空気の流れが偏らなくなる。そして、機器本体の４側面全体に熱交換器が位置して設置面が広がって四隅に無駄な空間がなくなり、かつ熱交換器へ冷媒が均等に流れることになる。さらに、二つの熱交換器における伝熱管の冷媒流路の冷媒を対称に流すことが可能となり、風速分布、冷媒の乾き度や圧力の分布が対称となるため、局所的な熱交換量分布も対称となり、二つの熱交換器それぞれの熱交換量が等しくなり、二つの熱交換器への冷媒分流を均等にすることが出来る。
【００１１】
また本発明の請求項３に記載の発明は、略直方体の機器本体内に、その３側面に沿って二つの対称形の略Ｌ字状の熱交換器を配置した熱交換装置であって、前記二つの熱交換器は、熱交換器を構成するフィンの主平面に直交して蛇行状に連続して複数段に配置した伝熱管の冷媒流路の列数を１列もしくは複数列にするとともに前記伝熱管の冷媒流路の配置構成を対称形にしたものである。
【００１２】
また本発明の請求項４に記載の発明は、略直方体の機器本体内に、その相対向する２側面に沿って二つの対称形の直線状の熱交換器を配置した熱交換装置であって、前記二つの熱交換器は、熱交換器を構成するフィンの主平面に直交して蛇行状に連続して複数段に配置した伝熱管の冷媒流路の列数を１列もしくは複数列にするとともに前記伝熱管の冷媒流路の配置構成を対称形にしたものである。
【００１３】
これらの構成によれば、二つの対称形の略Ｌ字状の熱交換器を機器本体内の３側面に沿って、または二つの対称形の略直線状の熱交換器を対称形に配置するだけで、熱交換器を組み立てることができるとともに、空気の流れが偏らなくなり、かつ熱交換器へ冷媒が均等に流れることになる。さらに、二つの熱交換器における伝熱管の冷媒流路の冷媒を対称に流すことが可能となり、風速分布、冷媒の乾き度や圧力の分布が対称となるため、局所的な熱交換量分布も対称となり、二つの熱交換器それぞれの熱交換量が等しくなり、二つの熱交換器への冷媒分流を均等にすることが出来る。
【００２２】
【実施例】
以下本発明の実施例について図１〜図８を参照して説明する。
【００２３】
（実施例１）
図１は本発明の実施例１における二つの熱交換器を用いた空気調和機の室内機または室外機を示す平面図で、図２は同じく熱交換器の配置構成を示す斜視図で、図3（ａ）は同じく左側の熱交換器の冷媒経路図で、図3（ｂ）は同じく右側の熱交換器の冷媒経路図である。
【００２４】
２１は天面から見ると略正方形にした空気調和機の室内機または室外機としての機器本体、２２は機器本体２１の天面、底面のいずれか片面あるいは両面を吹出しまたは吸込みとする送風機で、本実施例では天面を吹出しにするとともに、機器本体２１の中央部に配置してある。２３、２４は二つの対称形の略Ｌ字状の熱交換器で、２３が左側の熱交換器、２４が右側の熱交換器で、機器本体２１の４側面の全長に沿って（４側面を囲む）対称形に配置してある。そして、これら熱交換器２３、２４は間隔を有して積層したアルミ製の多数のフイン２３ａ、２４ａとこれに直交して蛇行状に配置した伝熱管２５から構成されている。特に、熱交換器２３、２４は、伝熱管２５の列数を１列とし、同じ冷媒流路の構成にしている。すなわち、図３（ａ）、図３（ｂ）に示すように伝熱管２５の列数を１列の対称形にせしめ、伝熱管段方向のほぼ中央に加熱ガス冷媒を流入する二つの入口管２６、２７を隣接して配置し、この二つの入口管２６、２７から互いに離れて行く方向へ二つの経路に分岐し、かつ出口寄りで伝熱管２５を一つの経路２５ａとして伝熱管段方向下側に配置し、この経路２５ａとしての伝熱管に連通して過冷却液状態の冷媒の出口管２８を一つとして伝熱管段方向下端に配置して、加熱ガス冷媒を二つの入口管より流入せしめ、この入口管から離れ二つの経路を流動しつつ冷却され二相状態の冷媒となり、更に凝縮されて液成分の多い二相状態または過冷却液状態となった冷媒を二つの経路から一つに合流させる前記伝熱管２５ａに流入する構成にしたものである。なお、左右の入口管２６、２７および出口管２８への配管は二点鎖線で示すように１本の配管を分岐して行う。
【００２５】
上記構成において、送風機２２を運転すれば外部の空気は、機器本体２１の４側面の全長に沿った熱交換器２３、２４と熱交換して吸引され、天面から機器本体２１外に排気される。
【００２６】
そして、二つの対称形の略Ｌ字状の熱交換器を機器本体内の４側面の略全長に沿って対称形に配置しているので、熱交換器の設置面が広がって四隅に無駄な空間がなくなり熱交換器２３、２４の通風面積を大きくして収納性（設置性）を改善するとともに、ただ二つの熱交換器２３、２４を用いるだけなので、安価な熱交換器を容易に組み立てることができる。また、二つの対称形の熱交換器２３、２４を対称形に配置しているので、送風機２２による空気の流れに偏流が起きにくく、風量の低下と送風騒音の増大を抑えることができるとともに、二つの熱交換器２３、２４の性能がほぼ等しくなるので、それぞれの熱交換器２３、２４へ冷媒を均等に流すことができ、熱交換器の性能を有効に活かすことができる。
【００２７】
また、対称形の略Ｌ字状の熱交換器２３、２４は、伝熱管２５の列数を1列とし、その冷媒流路を同じ構成にしたものである。
【００２８】
この構成によれば、二つの熱交換器２３、２４で局所的な熱交換の性能分布も対称になっているので、２つの熱交換器２３、２４の性能が更に等しくなり、それぞれの熱交換器２３、２４へ冷媒を均等に流すことができ、熱交換器の性能を更に有効に活かすことができる。
【００２９】
さらに、伝熱管２５の列数が1列の対称形の略Ｌ字状の熱交換器２３、２４は、凝縮器として動作するとき、二つの熱交換器２３、２４のそれぞれの冷媒流路について、過冷却液状態の冷媒の出口管２８を１つとして伝熱管段方向下端に配置し、前記出口管につながる二相状態または過冷却液状態の冷媒が流動する出口寄りの伝熱管２５について一つの経路２５ａとして伝熱管段方向下側に配置し、残りの伝熱管２５の伝熱管段方向の略中央に加熱ガス冷媒が流入する二つの入口管２６、２７を隣接して配置し、冷媒は残りの伝熱管内を二つの入口管から離れていく方向に二つの経路で流動しつつ冷却され二相状態の冷媒となり、さらに凝縮され、液成分の多い二相状態または過冷却液状態となった冷媒を二つの経路から１つに合流させ一つの経路の出口寄りの伝熱管２５ａに流入する構成にしたものである。
【００３０】
この構成によれば、同じ冷媒流速に対して他より冷媒の熱伝達率が低く、冷媒流通抵抗も低い乾き度の小さい二相冷媒あるいは液冷媒が流れている伝熱管の冷媒の流路数を１つにしているので、この部分の冷媒流速が速くなることにより余り冷媒流通抵抗を上昇させずに冷媒の熱伝達率を向上させることができる。したがって、熱交換器の全体の性能を大幅に向上させることができる。また最も高い温度の加熱ガス冷媒が流入する二つの流入管２６、２７を隣接して配置するとともに冷媒を入口管２６、２７から、互いにしだいに離れていくように流すので、高温冷媒が流れる伝熱管２５から隣接する伝熱管２５へフィン２５ａを介して伝熱することが余りない。更に最も低い温度の過冷却液状態の冷媒が流出する出口管２８を出口方向下端に配置しているので、最も低温の冷媒が流れる出口管２８へ隣接する伝熱管２５からフィン２５ａを介して伝熱することも余りない。これら温度差のある冷媒同士がフィン２５ａを介して伝熱することによる熱交換の損失を低減することができる。
【００３１】
（実施例２）
図４は本発明の実施例２における二つの熱交換器を用いた空気調和機の室内機または室外機を示す平面図で、二つの熱交換器を対称形の略Ｕ字状にせしめ、かつ略直方体の機器本体内の４側面の全長に沿わせて対称形に配置した点以外は、上記実施例１の発明と同じなので、同一部分には符号を付して詳細な説明を省略し、異なる部分を中心に説明する。
【００３２】
３１は天面から見ると略直方体にした空気調和機の室内機または室外機としての機器本体、３２は送風機で、機器本体３１内に２個配置してある。３３、３４は二つの対称形の略Ｕ字状の左側と右側の熱交換器で、機器本体３１の４側面の全長に沿って（４側面を囲む）対称形に配置してある。そして、これら熱交換器３３、３４は間隔を有して積層したアルミ製の多数のフイン（図示せず）とこれに直交して蛇行状に配置した伝熱管３５から構成されている。特に、熱交換器３３、３４は、伝熱管３５の列数を１列とし、同じ冷媒流路に構成している。
【００３３】
上記構成によれば、送風機３２を運転すれば外部の空気は、機器本体３１の４側面の全長に沿った熱交換器３３、３４と熱交換して吸引され、天面から機器本体３１外に排気される。
【００３４】
そして、機器本体３１の４側面の全長に沿って対称形に配置した熱交換器３３、３４は、その通風面積を大きくして収納性を改善するとともに、ただ二つの熱交換器３３、３４を用いるだけなので、安価な熱交換器を容易に組み立てることができる。また、二つの対称形の熱交換器３３、３４を対称形に配置するので、空気の流れに偏流が起きにくく、風量の低下と送風騒音の増大を抑えることができるとともに、２つの熱交換器３３、３４の性能がほぼ等しくなるので、それぞれの熱交換器３３、３４へ冷媒を均等に流すことができ、熱交換器の性能を有効に活かすことができる。
【００３５】
（実施例３）
図５は本発明の実施例３における二つの熱交換器を用いた空気調和機の室内機または室外機を示す平面図で、二つの熱交換器を対称形の略Ｌ字状にせしめ、かつ略直方体の機器本体内の３側面の全長に沿わせて対称形に配置した点以外は、上記実施例１の発明と同じなので、同一部分には符号を付して詳細な説明を省略し、異なる部分を中心に説明する。
【００３６】
４１は天面から見ると略直方体にした空気調和機の室内機または室外機としての機器本体、４２は送風機で、機器本体４１内に２個配置してある。４３、４４は二つの対称形の略Ｌ字状の左側と右側の熱交換器で、機器本体４１の３側面の全長に沿って（３側面を囲む）対称形に配置してある。そして、これら熱交換器４３、４４は間隔を有して積層したアルミ製の多数のフイン（図示せず）とこれに直交して蛇行状に配置した伝熱管４５から構成されている。特に、熱交換器４３、４４は、伝熱管４５の列数を１列とし、同じ冷媒流路に構成している。
【００３７】
上記構成によれば、送風機４２を運転すれば外部の空気は、機器本体４１の３側面の全長に沿った熱交換器４３、４４と熱交換して吸引され、天面から機器本体４１外に排気される。
【００３８】
そして、機器本体４１の３側面の全長に沿って対称形に配置した熱交換器４３、４４の通風面積を大きくして収納性を改善するとともに、ただ二つの熱交換器４３、４４を用いるだけなので、安価な熱交換器を容易に組み立てることができる。また、二つの対称形の熱交換器４３、４４を対称形に配置するので、空気の流れに偏流が起きにくく、風量の低下と送風騒音の増大を抑えることができるとともに、二つの熱交換器４３、４４の性能がほぼ等しくなるので、それぞれの熱交換器４３、４４へ冷媒を均等に流すことができ、熱交換器の性能を有効に活かすことができる。
【００３９】
（実施例４）
図６は本発明の実施例４における二つの熱交換器を用いた空気調和機の室内機または室外機を示す平面図、図７は同実施例４における二つの熱交換器の配置構成を示す斜視図、図８（ａ）は同実施例４における左側の熱交換器の冷媒経路図、図８（ｂ）は同じく右側の熱交換器の冷媒経路図である。そして、実施例４の発明は、二つの熱交換器を対称形の略直線状にせしめ、かつ略直方体の機器本体内の相対向する長い側面の全長に沿わせて対称形に配置した点以外は、上記実施例１の発明と同じなので、同一部分には符号を付して詳細な説明を省略し、異なる部分を中心に説明する。
【００４０】
５１は天面から見ると略直方体にした空気調和機の室内機または室外機としての機器本体、５２は送風機で、機器本体５１内に相対向する長い側面に沿い２個並設し、熱交換器の無い２側面の1面〜４面を吸込みまたは吹出しとする。５３、５４は二つの対称形の略直線状の左側と右側の熱交換器で、機器本体５１の相対向する長い側面の全長に沿って対称形に配置してある。そして、これら熱交換器５３、５４は間隔を有して積層したアルミ製の多数のフイン５３ａ、５４ａとこれに直交して蛇行状に配置した伝熱管５５から構成されている。特に、熱交換器５３、５４は、伝熱管５５の列数を２列とし、同じ冷媒流路に構成している。すなわち、図８（ａ）、図８（ｂ）に示すように伝熱管５５の列数を２列の対称形にせしめ、伝熱管段方向の略中央の２列の内側列に加熱ガス冷媒を流入する二つの入口管５６、５７を隣接して配置する。そして、二つの入口管５６、５７から互いに離れて行く方向へ二つの経路に分岐して伝熱管段方向の上端と下端で２列の外側列に移って再び伝熱管段方向の中央へ向かって互いに近づき略中央で合流し伝熱管５５を一つの経路５５ａとして伝熱管段方向下側に配置する。更に、この経路５５ａとしての伝熱管に連通して過冷却液状態の冷媒の出口管５８を一つとして伝熱管段方向下端に配置している。従って、加熱ガス冷媒を二つの入口管５６、５７より流入せしめ、この入口管から離れ再び戻る2つの経路を流動しつつ冷却され二相状態の冷媒となり、更に凝縮されて液成分の多い二相状態または過冷却液状態となった冷媒を二つの経路から一つに合流させる前記伝熱管５５ａに流入する構成にしたものである。なお、左右の入口管５６、５７および出口管５８への配管は二点鎖線で示すように１本の配管を分岐して行う。
【００４１】
上記構成において、送風機５２を運転すれば外部の空気は、機器本体５１の相対向する長い側面の全長に沿った熱交換器５３、５４と熱交換して吸引され、天面から機器本体５１外に排気される。
【００４２】
そして、この構成によれば熱交換器５３、５４の通風面積を大きくして収納性を改善するとともに、ただ二つの熱交換器５３、５４を用いるだけなので、安価な熱交換器を容易に組み立てることができる。また、二つの対称形の熱交換器５３、５４を機器本体５１の相対向する長い側面の全長に沿って対称形に配置するので、空気の流れに偏流が起きにくく、風量の低下と送風騒音の増大を抑えることができるとともに、二つの熱交換器５３、５４の性能がほぼ等しくなるので、それぞれの熱交換器５３、５４へ冷媒を均等に流すことができ、熱交換器の性能を有効に活かすことができる。
【００４３】
また、二つの対称形の直線状の熱交換器５３、５４は、伝熱管５５の列数を複数列、例えば２列とし、その冷媒流路構成も二つの熱交換器５３、５４で対称形としたものである。従って、二つの熱交換器５３、５４で空気の流動方向に対する冷媒流路の配置構成も対称になっているので、二つの熱交換器５３、５４で局所的な熱交換の性能分布も対称になり、二つの熱交換器５３、５４の全体性能が更に等しくなり、それぞれの熱交換器５３、５４へ冷媒を均等に流すことができ、熱交換器の性能を更に有効に活かすことができる。
【００４４】
更に、二つの対称形の直線状で、かつ伝熱管５５の列数が２列の熱交換器５３、５４は、熱交換器が凝縮器として動作するとき、二つの熱交換器にそれぞれ、加熱ガス状態の冷媒が複数、例えば二つの入口管５６、５７から流入し、冷却され二相状態の冷媒となって凝縮が進むにしたがって冷媒を伝熱管５５の外側列の中央で合流させていき、冷媒出口寄りの部分で最終的に１つの経路に合流し、過冷却液状態の冷媒となって一つの出口管５８から流出する冷媒流路構成としたものである。
【００４５】
この構成によれば、同じ冷媒流速に対しても冷媒流通抵抗の大きくなる乾き度の大きい二相冷媒が流れている処ほど冷媒の流路数を多くしているので、熱交換器全体の冷媒流通抵抗を余り大きくすることがないとともに、同じ冷媒流速に対して冷媒の熱伝達率が他より低い乾き度の小さい二相冷媒あるいは液冷媒が流れている伝熱管の冷媒の流路数を一つにしているので、この部分の冷媒流速が速くなることにより冷媒の熱伝達率を向上させ、熱交換器の全体の性能を向上させることができる。
【００４６】
なお、上記実施例１の伝熱管を１列とした熱交換器の代わりに、実施例４の伝熱管を複数列とした熱交換器を用いても複数列の熱交換器としての同様の効果を得ることができる。また、実施例４の伝熱管を複数列とした熱交換器の代わりに、実施例１の１列の熱交換器を用いても１列の熱交換器としての同様の効果を得ることができる。更に、実施例２および実施例３において実施例１の伝熱管を１列とした熱交換器あるいは実施例４の伝熱管を複数列とした熱交換器を用いても同様の効果を得ることができる。
【００４７】
【発明の効果】
上記実施例から明らかなように本発明の請求項１に記載の発明は、機器本体内に、その４側面に沿って二つの対称形の略Ｌ字状の熱交換器を配置した熱交換装置であって、前記二つの熱交換器は、熱交換器を構成するフィンの主平面に直交して蛇行状に連続して複数段に配置した伝熱管の冷媒流路の列数を１列もしくは複数列にするとともに前記伝熱管の冷媒流路の配置構成を対称形にしたものである。
【００４８】
また請求項２に記載の発明は、略直方体の機器本体内に、その４側面に沿って二つの対称形の略Ｕ字状の熱交換器を配置した熱交換装置であって、前記二つの熱交換器は、熱交換器を構成するフィンの主平面に直交して蛇行状に連続して複数段に配置した伝熱管の冷媒流路の列数を１列もしくは複数列にするとともに前記伝熱管の冷媒流路の配置構成を対称形にしたものである。
【００４９】
また請求項３に記載の発明は、略直方体の機器本体内に、その３側面に沿って二つの対称形の略Ｌ字状の熱交換器を配置した熱交換装置であって、前記二つの熱交換器は、熱交換器を構成するフィンの主平面に直交して蛇行状に連続して複数段に配置した伝熱管の冷媒流路の列数を１列もしくは複数列にするとともに前記伝熱管の冷媒流路の配置構成を対称形にしたものである。
【００５０】
また請求項４に記載の発明は、略直方体の機器本体内に、その相対向する２側面に沿って二つの対称形の直線状の熱交換器を配置した熱交換装置であって、前記二つの熱交換器は、熱交換器を構成するフィンの主平面に直交して蛇行状に連続して複数段に配置した伝熱管の冷媒流路の列数を１列もしくは複数列にするとともに前記伝熱管の冷媒流路の配置構成を対称形にしたものである。
【００５１】
上記した各発明によれば、熱交換器の通風面積を大きくして収納性を改善できるとともに、安価な熱交換器を容易に組み立てることができる。そして、空気の流れに偏流が起きにくく、風量の低下と送風騒音の増大を抑えることができるとともに、それぞれの熱交換器へ冷媒を均等に流すことができ、熱交換器の性能を有効に活かすことができる。さらに、二つの熱交換器における伝熱管の冷媒流路の冷媒を対称に流すことが可能となり、風速分布、冷媒の乾き度や圧力の分布が対称となるため、局所的な熱交換量分布も対称となり、二つの熱交換器それぞれの熱交換量が等しくなり、二つの熱交換器への冷媒分流を均等にすることが出来る。
【図面の簡単な説明】
【図１】本発明熱交換装置の実施例１における二つの熱交換器を用いた空気調和機の室外機または室内機を示す平面図
【図２】同実施例１における空気調和機の室外機または室内機の二つの熱交換器の配置構成を示す斜視図
【図３】（ａ）同実施例１における左側の熱交換器の冷媒経路図
（ｂ）同実施例１における右側の熱交換器の冷媒経路図
【図４】同実施例２における二つの熱交換器を用いた空気調和機の室内機または室外機を示す平面図
【図５】同実施例３における二つの熱交換器を用いた空気調和機の室内機または室外機を示す平面図
【図６】同実施例４における二つの熱交換器を用いた空気調和機の室内機または室外機を示す平面図
【図７】同実施例４における空気調和機の室外機または室内機の二つの熱交換器の配置構成を示す斜視図
【図８】（ａ）同実施例４における左側の熱交換器の冷媒経路図
（ｂ）同実施例４における右側の熱交換器の冷媒経路図
【図９】従来の熱交換器を用いたファンコイルユニットの平面図
【符号の説明】
２１，３１，４１，５１機器本体
２２，３２，４２，５２送風機
２３，２４略Ｌ字状の熱交換器
２５，３５，４５，５５伝熱管
２６，２７入口管
２８，５８出口管
３３，３４略Ｕ字状の熱交換器
４３，４４略Ｌ字状の熱交換器
５３，５４直線状の熱交換器
５５ａ一つの経路
５６，５７入口管[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat exchange device used for an indoor unit or an outdoor unit of an air conditioner.
[0002]
[Prior art]
As a heat exchange device used for a conventional outdoor unit of an air conditioner, there is one having a configuration as shown in FIG. 9, similar to the configuration of the fan coil unit described in JP-A-8-327138. . In FIG. 9, reference numeral 1 denotes a fan coil unit of an air conditioner, which is substantially square when viewed from the top, and includes water / air heat exchangers 2, 3, 4, 5 of four-row heat transfer tubes that are linear along four side surfaces. It is arranged. Reference numeral 6 denotes an inlet header for cold / hot water, which is connected to a heat transfer tube in the first row inside the first end of the first heat exchanger 2 via eight branch pipes. The heat transfer tubes in the first row inside the first heat exchanger 2 go out to the other end, where they pass through the eight 90 ° bends 7 to the heat transfer tubes in the first row inside the second heat exchanger 3. It is connected. In the same manner, the eight heat transfer tubes that have passed through the third heat exchanger 4 and the fourth heat exchanger 5 pass through eight return bends 8 at the position where they have left the fourth heat exchanger 5 and are in the direction of 180 °. It is converted and connected to the heat transfer tubes in the second row inside the fourth heat exchanger 5. This time, on the contrary, eight 90 ° bends 7 are attached to each heat transfer tube from the fourth heat exchanger 5 to the third heat exchanger 4, the second heat exchanger 3, and the first heat exchanger 2. Through the return bend 8 and turn again into the inner third row, and finally through the inner fourth row or outer first row of each heat exchanger, the first heat exchanger Returning to the first end of 2, it communicates with the cold / hot water outlet header 9. 10 is a bottom plate of the fan coil unit, 11 is a casing that covers the gap between the four heat exchangers, and 12 is an axial blower disposed in the center of the bottom plate 10, and the air in the fan coil unit 1 is removed by the rotation of the propeller. The air is sucked and the air is blown out from an outlet (not shown) at the center lower portion of the bottom plate 10.
[0003]
In the above configuration, outside air passes through the gaps between the aluminum fins of the four heat exchangers 2 to 5 and is sucked into the fan coil unit one after another. Here, heat exchange is performed between the air passing through the heat exchangers 2 to 5 and cold water or hot water flowing through the heat transfer tubes of the heat exchanger via aluminum fins. In this way, the air outside the fan coil unit passes through the heat exchangers 2 to 5 and is cooled or heated, and is sucked into the axial blower 12 one after another, pressurized, and downward from the outlet. Is blown out.
[0004]
[Problems to be solved by the invention]
However, in the conventional configuration, four heat exchangers 2 to 5 are necessary, and a great number of man-hours are required to connect the four heat exchangers with a bend, resulting in an increase in cost. Moreover, since the four corner spaces 13 for connecting with a bend are required, the volume of the main body becomes large. Further, since the air does not flow into the four corner spaces 13, there is a problem in that the air flow performance is deteriorated or noise is increased due to drift.
[0005]
The present invention solves such a conventional problem, and is used for an indoor unit or an outdoor unit of an air conditioner. The storage property and the air blowing characteristics of the heat exchanger are improved, and the performance is reduced. An object is to provide a heat exchange device that can be utilized effectively.
[0006]
[Means for Solving the Problems]
  In order to solve the above problems, the present invention is provided along the side surface in the device body.A heat exchanger in which two symmetrical heat exchangers are arranged, and the two symmetrical heat exchangers are arranged in a plurality of stages in a meandering manner perpendicular to the main plane of the fins constituting the heat exchanger. The number of rows of the refrigerant flow paths of the heat transfer tubes arranged in 1 is changed to one row or a plurality of rows and the arrangement configuration of the refrigerant flow passages of the heat transfer tubes is made symmetricalIs.
[0007]
With the above configuration, the main body of the equipment, for example, an air conditioner indoor unit or an outdoor unit heat exchanger is configured with two heat exchangers and can be easily assembled, and good air blowing characteristics can be obtained. The refrigerant can be evenly flowed to the heat exchanger, and the performance of the heat exchanger can be effectively utilized.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
  According to the first aspect of the present invention, two symmetrical substantially L-shaped heat exchangers are arranged along the four side surfaces in the apparatus main body.In the heat exchange device, the two heat exchangers have the number of rows of the refrigerant flow paths of the heat transfer tubes arranged in a plurality of stages continuously in a meandering manner perpendicular to the main plane of the fins constituting the heat exchanger. The arrangement of the refrigerant flow paths of the heat transfer tubes is made symmetrical with one or more rows.Is.
[0009]
  In the invention according to claim 2 of the present invention, two symmetrical substantially U-shaped heat exchangers are arranged along the four side surfaces in a substantially rectangular parallelepiped device body.In the heat exchange device, the two heat exchangers have the number of rows of the refrigerant flow paths of the heat transfer tubes arranged in a plurality of stages continuously in a meandering manner perpendicular to the main plane of the fins constituting the heat exchanger. The arrangement of the refrigerant flow paths of the heat transfer tubes is made symmetrical with one or more rows.Is.
[0010]
  According to these configurations, the heat exchanger can be assembled only by arranging two symmetrical substantially L-shaped or substantially U-shaped heat exchangers symmetrically along the four side surfaces in the apparatus body. This is possible and the air flow is not uneven. In addition, the heat exchanger is located on the entire four side surfaces of the device body, the installation surface spreads, there is no useless space at the four corners, and the refrigerant flows evenly to the heat exchanger.The Furthermore, it becomes possible to flow the refrigerant in the refrigerant flow path of the heat transfer tubes in the two heat exchangers symmetrically, and the wind speed distribution, the dryness of the refrigerant and the pressure distribution are symmetric, so the local heat exchange amount distribution is also It becomes symmetrical, the heat exchange amount of each of the two heat exchangers becomes equal, and the refrigerant distribution to the two heat exchangers can be made uniform.The
[0011]
  In the invention according to claim 3 of the present invention, two symmetrical substantially L-shaped heat exchangers are arranged along the three side surfaces in a substantially rectangular parallelepiped device body.In the heat exchange device, the two heat exchangers have the number of rows of the refrigerant flow paths of the heat transfer tubes arranged in a plurality of stages continuously in a meandering manner perpendicular to the main plane of the fins constituting the heat exchanger. The arrangement of the refrigerant flow paths of the heat transfer tubes is made symmetrical with one or more rows.Is.
[0012]
  In the invention according to claim 4 of the present invention, two symmetrical linear heat exchangers are arranged along two opposing side surfaces in a substantially rectangular parallelepiped device body.In the heat exchange device, the two heat exchangers have the number of rows of the refrigerant flow paths of the heat transfer tubes arranged in a plurality of stages continuously in a meandering manner perpendicular to the main plane of the fins constituting the heat exchanger. The arrangement of the refrigerant flow paths of the heat transfer tubes is made symmetrical with one or more rows.Is.
[0013]
  According to these configurations, two symmetrical substantially L-shaped heat exchangers are arranged along three side surfaces in the apparatus main body, or two symmetrical substantially linear heat exchangers are arranged symmetrically. As a result, the heat exchanger can be assembled, the air flow is not uneven, and the refrigerant flows evenly to the heat exchanger.The Furthermore, it becomes possible to flow the refrigerant in the refrigerant flow path of the heat transfer tubes in the two heat exchangers symmetrically, and the wind speed distribution, the dryness of the refrigerant and the pressure distribution are symmetric, so the local heat exchange amount distribution is also It becomes symmetrical, the heat exchange amount of each of the two heat exchangers becomes equal, and the refrigerant distribution to the two heat exchangers can be made uniform.The
[0022]
【Example】
Embodiments of the present invention will be described below with reference to FIGS.
[0023]
  Example 1
  FIG. 1 is a plan view showing an indoor unit or an outdoor unit of an air conditioner using two heat exchangers in Example 1 of the present invention, and FIG. 2 is a perspective view showing the arrangement of the heat exchangers. 3 (a) is the refrigerant path diagram of the left heat exchanger, and FIG. 3 (b) is the refrigerant path diagram of the right heat exchanger.is there.
[0024]
21 is a device body as an indoor unit or an outdoor unit of an air conditioner that is substantially square when viewed from the top surface, 22 is a blower that blows or sucks either one or both sides of the top surface or bottom surface of the device body 21, In the present embodiment, the top surface is blown out and is arranged at the center of the device main body 21. 23 and 24 are two symmetrical substantially L-shaped heat exchangers, 23 is a heat exchanger on the left side, 24 is a heat exchanger on the right side, and runs along the entire length of the four side surfaces of the device body 21 (four side surfaces). It is arranged symmetrically. The heat exchangers 23 and 24 are composed of a large number of aluminum fins 23a and 24a stacked at intervals, and heat transfer tubes 25 arranged in a meandering manner perpendicular to the fins 23a and 24a. In particular, in the heat exchangers 23 and 24, the number of rows of the heat transfer tubes 25 is one, and the same refrigerant flow path is used. That is, as shown in FIGS. 3 (a) and 3 (b), two inlet pipes in which the number of rows of the heat transfer tubes 25 is made symmetrical to one row and the heated gas refrigerant flows into the approximate center of the heat transfer tube stage direction. 26, 27 are arranged adjacent to each other, branch off into two paths in a direction away from the two inlet pipes 26, 27, and the heat transfer pipe 25 is provided as one path 25a near the outlet, and the lower direction of the heat transfer pipe. The refrigerant outlet pipe 28 in the supercooled liquid state is connected to the heat transfer pipe as the path 25a and arranged at the lower end in the heat transfer pipe stage direction so that the heated gas refrigerant flows from the two inlet pipes. The refrigerant that has been cooled and flowing in two paths away from the inlet pipe to become a two-phase refrigerant, and further condensed into a two-phase or supercooled liquid state with a large amount of liquid components, is one from the two paths. To flow into the heat transfer tube 25a to be joined It is intended. Note that piping to the left and right inlet pipes 26 and 27 and the outlet pipe 28 is performed by branching one pipe as shown by a two-dot chain line.
[0025]
In the above configuration, when the blower 22 is operated, external air is sucked by exchanging heat with the heat exchangers 23 and 24 along the entire length of the four side surfaces of the device main body 21 and exhausted from the top surface to the outside of the device main body 21. The
[0026]
And since two symmetrical substantially L-shaped heat exchangers are arranged symmetrically along substantially the entire length of the four side surfaces in the apparatus body, the installation surface of the heat exchanger spreads and is wasted at the four corners. Since there is no space and the ventilation area of the heat exchangers 23 and 24 is increased to improve storage (installability) and only two heat exchangers 23 and 24 are used, an inexpensive heat exchanger is easily assembled. be able to. In addition, since the two symmetrical heat exchangers 23 and 24 are arranged symmetrically, it is difficult for drift to occur in the air flow by the blower 22, and it is possible to suppress a decrease in air volume and an increase in blowing noise, Since the performances of the two heat exchangers 23 and 24 are substantially equal, the refrigerant can be evenly flowed to the respective heat exchangers 23 and 24, and the performance of the heat exchanger can be effectively utilized.
[0027]
The symmetrical substantially L-shaped heat exchangers 23 and 24 are configured such that the number of rows of the heat transfer tubes 25 is one and the refrigerant flow paths have the same configuration.
[0028]
According to this configuration, the performance distribution of the local heat exchange between the two heat exchangers 23 and 24 is also symmetric, so that the performance of the two heat exchangers 23 and 24 is further equal, and each heat exchange Thus, the refrigerant can be evenly flowed to the chambers 23 and 24, and the performance of the heat exchanger can be utilized more effectively.
[0029]
Furthermore, the symmetrical substantially L-shaped heat exchangers 23 and 24 having one row of the heat transfer tubes 25 operate as a condenser, and the refrigerant flow paths of the two heat exchangers 23 and 24 are respectively A single outlet pipe 28 for the refrigerant in the supercooled liquid state is disposed at the lower end in the heat transfer tube stage direction, and the heat transfer pipe 25 near the outlet where the refrigerant in the two-phase state or the supercooled liquid state connected to the outlet pipe flows. Two passages 25a are arranged on the lower side in the heat transfer tube stage direction, and two inlet pipes 26 and 27 into which the heated gas refrigerant flows are arranged adjacent to each other in the approximate center of the remaining heat transfer pipe 25 in the heat transfer tube stage direction. The remaining heat transfer pipe is cooled in two directions in the direction away from the two inlet pipes and cooled to become a two-phase refrigerant, and further condensed to a two-phase state or a supercooled liquid state with many liquid components. Combined refrigerants from two paths into one It is configured to flow into the heat transfer tube 25a near the exit of the path.
[0030]
According to this configuration, the number of refrigerant flow paths of the heat transfer tube in which the two-phase refrigerant or liquid refrigerant is flowing with a low dryness and a low refrigerant flow resistance and a low refrigerant flow resistance for the same refrigerant flow rate. Since one is used, the flow rate of the refrigerant in this portion is increased, so that the heat transfer coefficient of the refrigerant can be improved without increasing the refrigerant flow resistance. Therefore, the overall performance of the heat exchanger can be greatly improved. In addition, the two inflow pipes 26 and 27 into which the heated gas refrigerant having the highest temperature flows are arranged adjacent to each other and the refrigerant is made to flow gradually away from the inlet pipes 26 and 27, so that the high temperature refrigerant flows. There is not much that heat is transferred from the heat tube 25 to the adjacent heat transfer tube 25 via the fins 25a. Further, since the outlet pipe 28 through which the refrigerant in the supercooled liquid state at the lowest temperature flows out is arranged at the lower end in the outlet direction, the refrigerant is transferred from the heat transfer pipe 25 adjacent to the outlet pipe 28 through which the coldest refrigerant flows through the fins 25a. There is not much heat. It is possible to reduce heat exchange loss due to heat transfer between the refrigerants having these temperature differences through the fins 25a.
[0031]
  (Example 2)
  FIG. 4 is a plan view showing an indoor unit or an outdoor unit of an air conditioner using two heat exchangers according to Embodiment 2 of the present invention, in which the two heat exchangers are made symmetrical U-shaped, and Except for the symmetrical arrangement along the entire length of the four side surfaces in the substantially rectangular parallelepiped device body, the same parts as those in the invention of the first embodiment, the same parts are denoted by the same reference numerals, and detailed description thereof is omitted. Explanation focusing on different partsTo do.
[0032]
31 is an apparatus main body as an indoor unit or outdoor unit of an air conditioner that is a substantially rectangular parallelepiped when viewed from the top, and 32 is a blower, and two are arranged in the apparatus main body 31. Reference numerals 33 and 34 denote two symmetrical substantially U-shaped left and right heat exchangers which are arranged symmetrically along the entire length of the four side surfaces of the device body 31 (enclose the four side surfaces). These heat exchangers 33 and 34 are composed of a number of aluminum fins (not shown) stacked at intervals and a heat transfer tube 35 arranged in a meandering manner perpendicular to the fins. In particular, the heat exchangers 33 and 34 are configured in the same refrigerant flow path with one row of heat transfer tubes 35.
[0033]
According to the above configuration, when the blower 32 is operated, external air is sucked by exchanging heat with the heat exchangers 33 and 34 along the entire length of the four side surfaces of the device main body 31, and from the top surface to the outside of the device main body 31. Exhausted.
[0034]
The heat exchangers 33 and 34 arranged symmetrically along the entire length of the four side surfaces of the device body 31 increase the ventilation area to improve the storage property, and only two heat exchangers 33 and 34 are provided. Since it is only used, an inexpensive heat exchanger can be easily assembled. Moreover, since the two symmetrical heat exchangers 33 and 34 are arranged symmetrically, it is difficult for the air flow to drift, and it is possible to suppress the decrease in the air volume and the increase in the blowing noise, and the two heat exchangers. Since the performance of 33 and 34 becomes substantially equal, a refrigerant can be evenly flowed to each heat exchanger 33 and 34, and the performance of a heat exchanger can be used effectively.
[0035]
  (Example 3)
  FIG. 5 is a plan view showing an indoor unit or an outdoor unit of an air conditioner using two heat exchangers according to Embodiment 3 of the present invention, in which the two heat exchangers are made symmetrical L-shaped, and Except for the symmetrical arrangement along the entire length of the three side surfaces of the substantially rectangular parallelepiped device main body, the same parts as those of the first embodiment, the same parts are denoted by the same reference numerals, and detailed description thereof is omitted. Explanation focusing on different partsTo do.
[0036]
41 is a device body as an indoor unit or an outdoor unit of an air conditioner that is a substantially rectangular parallelepiped when viewed from the top surface, and 42 is a blower, and two are arranged in the device body 41. Reference numerals 43 and 44 denote two symmetrical substantially L-shaped left and right heat exchangers which are arranged symmetrically along the entire length of the three side surfaces of the device body 41 (enclose the three side surfaces). The heat exchangers 43 and 44 are composed of a number of aluminum fins (not shown) stacked at intervals and a heat transfer tube 45 arranged in a meandering manner perpendicular to the fins. In particular, the heat exchangers 43 and 44 are configured in the same refrigerant flow path with one row of the heat transfer tubes 45.
[0037]
According to the above configuration, if the blower 42 is operated, the external air is sucked by exchanging heat with the heat exchangers 43 and 44 along the entire length of the three side surfaces of the device main body 41, and from the top surface to the outside of the device main body 41. Exhausted.
[0038]
And the ventilation area of the heat exchangers 43 and 44 arranged symmetrically along the entire length of the three side surfaces of the device main body 41 is increased to improve the storage property, and only two heat exchangers 43 and 44 are used. Therefore, an inexpensive heat exchanger can be easily assembled. In addition, since the two symmetrical heat exchangers 43 and 44 are arranged symmetrically, it is difficult for the air flow to drift, the reduction of the air volume and the increase of the blowing noise can be suppressed, and the two heat exchangers Since the performance of 43 and 44 becomes substantially equal, the refrigerant can be evenly flowed to each of the heat exchangers 43 and 44, and the performance of the heat exchanger can be effectively utilized.
[0039]
  Example 4
  FIG. 6 is a plan view showing an indoor unit or an outdoor unit of an air conditioner using two heat exchangers in Example 4 of the present invention, and FIG. 7 shows an arrangement configuration of the two heat exchangers in Example 4. 8A is a refrigerant path diagram of the left heat exchanger in the fourth embodiment, and FIG. 8B is a refrigerant path diagram of the right heat exchanger. And the invention of Example 4 is that the two heat exchangers are symmetrically arranged in a straight line, and are arranged symmetrically along the entire length of the opposing long side surfaces in the substantially rectangular parallelepiped device body. Since this is the same as the invention of the first embodiment, the same parts are denoted by the same reference numerals, detailed description thereof is omitted, and different parts are mainly described.To do.
[0040]
51 is a device body as an indoor unit or outdoor unit of an air conditioner that is a substantially rectangular parallelepiped when viewed from the top surface, 52 is a blower, and two units are arranged side by side along opposite long sides in the device body 51 for heat exchange. 1 side to 4 sides of two side surfaces without a vessel are suctioned or blown out. Reference numerals 53 and 54 denote two symmetrical substantially linear left and right heat exchangers, which are arranged symmetrically along the entire length of the opposing long side surfaces of the device body 51. The heat exchangers 53 and 54 are composed of a large number of aluminum fins 53a and 54a stacked at intervals, and heat transfer tubes 55 arranged in a meandering manner perpendicular to the fins 53a and 54a. In particular, the heat exchangers 53 and 54 have two heat transfer tubes 55 arranged in the same refrigerant flow path. That is, as shown in FIGS. 8 (a) and 8 (b), the number of rows of the heat transfer tubes 55 is made to be two symmetrical, and the heated gas refrigerant is placed in the inner rows of the two rows at approximately the center in the heat transfer tube stage direction. Two inlet pipes 56 and 57 which flow in are arranged adjacent to each other. And it branches into two paths in the direction away from each other from the two inlet pipes 56, 57, moves to the outer row of two rows at the upper end and the lower end in the heat transfer tube step direction, and again toward the center in the heat transfer tube step direction They are close to each other and merge at substantially the center, and the heat transfer tube 55 is arranged as one path 55a on the lower side in the heat transfer tube step direction. Further, a refrigerant outlet pipe 58 in a supercooled liquid state is connected to the heat transfer pipe as the path 55a, and is arranged at the lower end in the heat transfer pipe stage direction. Accordingly, the heated gas refrigerant is introduced through the two inlet pipes 56 and 57, and is cooled while flowing through the two paths away from the inlet pipe and returning again to become a two-phase refrigerant. The refrigerant in the state or the supercooled liquid state is configured to flow into the heat transfer tube 55a that joins the refrigerant from two paths into one. Note that piping to the left and right inlet pipes 56 and 57 and the outlet pipe 58 is performed by branching one pipe as shown by a two-dot chain line.
[0041]
In the above configuration, when the blower 52 is operated, the outside air is sucked by exchanging heat with the heat exchangers 53 and 54 along the entire length of the opposing long side surfaces of the device main body 51, and from the top surface to the outside of the device main body 51. Exhausted.
[0042]
And according to this structure, while the ventilation area of the heat exchangers 53 and 54 is enlarged and storage property is improved, since only two heat exchangers 53 and 54 are used, an inexpensive heat exchanger is easily assembled. be able to. Further, since the two symmetrical heat exchangers 53 and 54 are arranged symmetrically along the entire length of the opposing long side surfaces of the device main body 51, it is difficult for the air flow to drift, the air volume is reduced, and the blowing noise Since the performance of the two heat exchangers 53 and 54 is almost equal, the refrigerant can be evenly flowed to each of the heat exchangers 53 and 54, and the performance of the heat exchanger is effective. You can make use of it.
[0043]
The two symmetrical linear heat exchangers 53 and 54 have a plurality of heat transfer tubes 55, for example, two rows, and the refrigerant flow path is symmetrical with the two heat exchangers 53 and 54. It is what. Accordingly, since the arrangement of the refrigerant flow paths with respect to the air flow direction is symmetric in the two heat exchangers 53 and 54, the local heat exchange performance distribution is also symmetric in the two heat exchangers 53 and 54. Thus, the overall performance of the two heat exchangers 53 and 54 is further equal, and the refrigerant can be evenly flowed to the respective heat exchangers 53 and 54, so that the performance of the heat exchanger can be utilized more effectively.
[0044]
Furthermore, the heat exchangers 53 and 54 having two symmetric straight lines and two rows of the heat transfer tubes 55 are respectively heated when the heat exchanger operates as a condenser. As the refrigerant in the gas state flows in from a plurality of, for example, two inlet pipes 56 and 57, is cooled and becomes a two-phase refrigerant, and the condensation proceeds, the refrigerant is joined at the center of the outer row of the heat transfer tubes 55, A refrigerant flow path configuration is formed in which a portion close to the refrigerant outlet finally joins one path and becomes a refrigerant in a supercooled liquid state and flows out from one outlet pipe 58.
[0045]
According to this configuration, the number of refrigerant flow paths is increased as the two-phase refrigerant having a high degree of dryness that has a large refrigerant flow resistance at the same refrigerant flow rate. The flow resistance is not increased too much, and the number of refrigerant flow paths in the heat transfer tube in which the two-phase refrigerant or liquid refrigerant with low dryness is low for the same refrigerant flow rate is lower than the others. Therefore, the refrigerant flow rate at this portion is increased, so that the heat transfer coefficient of the refrigerant can be improved and the overall performance of the heat exchanger can be improved.
[0046]
In addition, even if it uses the heat exchanger which made the heat exchanger tube of Example 4 a plurality of rows instead of the heat exchanger made the heat exchanger tube of Example 1 in one row, the same effect as a heat exchanger of a plurality of rows is used. Can be obtained. Moreover, even if it uses the heat exchanger of 1 row of Example 1 instead of the heat exchanger which used the heat exchanger tube of Example 4 in multiple rows, the same effect as a 1 row heat exchanger can be acquired. . Further, in Example 2 and Example 3, the same effect can be obtained by using a heat exchanger in which the heat transfer tubes of Example 1 are arranged in one row or a heat exchanger in which the heat transfer tubes of Example 4 are arranged in multiple rows. it can.
[0047]
【The invention's effect】
  As is apparent from the above embodiment, the invention described in claim 1 of the present invention has two symmetrical substantially L-shaped heat exchangers arranged along the four side surfaces in the apparatus main body.In the heat exchange device, the two heat exchangers have the number of rows of the refrigerant flow paths of the heat transfer tubes arranged in a plurality of stages continuously in a meandering manner perpendicular to the main plane of the fins constituting the heat exchanger. The arrangement of the refrigerant flow paths of the heat transfer tubes is made symmetrical with one or more rows.Is.
[0048]
  In the invention according to claim 2, two symmetrical substantially U-shaped heat exchangers are arranged along the four side surfaces in a substantially rectangular parallelepiped device body.In the heat exchange device, the two heat exchangers have the number of rows of the refrigerant flow paths of the heat transfer tubes arranged in a plurality of stages continuously in a meandering manner perpendicular to the main plane of the fins constituting the heat exchanger. The arrangement of the refrigerant flow paths of the heat transfer tubes is made symmetrical with one or more rows.Is.
[0049]
  In the invention according to claim 3, two symmetrical substantially L-shaped heat exchangers are arranged along the three side surfaces in a substantially rectangular parallelepiped device body.In the heat exchange device, the two heat exchangers have the number of rows of the refrigerant flow paths of the heat transfer tubes arranged in a plurality of stages continuously in a meandering manner perpendicular to the main plane of the fins constituting the heat exchanger. The arrangement of the refrigerant flow paths of the heat transfer tubes is made symmetrical with one or more rows.Is.
[0050]
  Further, in the invention according to claim 4, two symmetrical linear heat exchangers are arranged in the substantially rectangular parallelepiped device body along two opposite side surfaces.In the heat exchange device, the two heat exchangers have the number of rows of the refrigerant flow paths of the heat transfer tubes arranged in a plurality of stages continuously in a meandering manner perpendicular to the main plane of the fins constituting the heat exchanger. The arrangement of the refrigerant flow paths of the heat transfer tubes is made symmetrical with one or more rows.Is.
[0051]
  According to each above-mentioned invention, while being able to enlarge the ventilation area of a heat exchanger and improving storage property, an inexpensive heat exchanger can be assembled easily. In addition, it is difficult for uneven flow to occur in the air flow, and it is possible to suppress a decrease in the air volume and increase in blowing noise, and it is possible to evenly flow the refrigerant to each heat exchanger, thereby effectively utilizing the performance of the heat exchanger. It is possibleThe Furthermore, it becomes possible to flow the refrigerant in the refrigerant flow path of the heat transfer tubes in the two heat exchangers symmetrically, and the wind speed distribution, the dryness of the refrigerant and the pressure distribution are symmetric, so the local heat exchange amount distribution is also It becomes symmetrical, the heat exchange amount of each of the two heat exchangers becomes equal, and the refrigerant distribution to the two heat exchangers can be made uniform.The
[Brief description of the drawings]
FIG. 1 is a plan view showing an outdoor unit or an indoor unit of an air conditioner using two heat exchangers in Embodiment 1 of the heat exchange apparatus of the present invention.
FIG. 2 is a perspective view showing an arrangement configuration of two heat exchangers of the outdoor unit or the indoor unit of the air conditioner in the first embodiment.
3A is a refrigerant path diagram of the left heat exchanger in Embodiment 1. FIG.
(B) Refrigerant route diagram of the right heat exchanger in Example 1
4 is a plan view showing an indoor unit or an outdoor unit of an air conditioner using two heat exchangers in Example 2. FIG.
FIG. 5 is a plan view showing an indoor unit or an outdoor unit of an air conditioner using two heat exchangers in the third embodiment.
6 is a plan view showing an indoor unit or an outdoor unit of an air conditioner using two heat exchangers in Example 4. FIG.
7 is a perspective view showing an arrangement configuration of two heat exchangers of an outdoor unit or an indoor unit of an air conditioner in Example 4. FIG.
FIG. 8A is a refrigerant path diagram of the left heat exchanger in the fourth embodiment.
(B) Refrigerant route diagram of right heat exchanger in Example 4
FIG. 9 is a plan view of a fan coil unit using a conventional heat exchanger.
[Explanation of symbols]
21, 31, 41, 51 Device body
22, 32, 42, 52
23, 24 Heat exchanger with a substantially L-shape
25, 35, 45, 55 Heat transfer tube
26, 27 inlet pipe
28,58 outlet pipe
33, 34 U-shaped heat exchanger
43, 44 Heat exchanger with a substantially L-shape
53,54 Linear heat exchanger
55a one route
56,57 inlet pipe

Claims

A heat exchanging device in which two symmetrical substantially L-shaped heat exchangers are arranged along the four side surfaces in an apparatus body , wherein the two heat exchangers are fins constituting the heat exchanger. The number of rows of the refrigerant flow paths of the heat transfer tubes arranged in a plurality of stages in a meandering manner perpendicular to the main plane is set to one row or a plurality of rows, and the arrangement configuration of the refrigerant flow channels of the heat transfer tubes is made symmetrical. A heat exchange device characterized by that .

A heat exchange device in which two symmetrical substantially U-shaped heat exchangers are arranged along the four side surfaces in a substantially rectangular parallelepiped device body, and the two heat exchangers constitute a heat exchanger. The number of the refrigerant flow paths of the heat transfer tubes arranged in a plurality of stages in a meandering manner perpendicular to the main plane of the fins to be arranged is one or a plurality of rows and the arrangement of the refrigerant flow paths of the heat transfer tubes is symmetric A heat exchange device characterized by its shape .

A heat exchange device in which two symmetrical substantially L-shaped heat exchangers are arranged along three side surfaces in a substantially rectangular parallelepiped device body, and the two heat exchangers constitute a heat exchanger. The number of the refrigerant flow paths of the heat transfer tubes arranged in a plurality of stages in a meandering manner perpendicular to the main plane of the fins to be arranged is one or a plurality of rows and the arrangement of the refrigerant flow paths of the heat transfer tubes is symmetric A heat exchange device characterized by its shape .

A heat exchange device in which two symmetrical linear heat exchangers are arranged along two opposite side surfaces in a substantially rectangular parallelepiped device body , wherein the two heat exchangers include a heat exchanger. An arrangement configuration of the refrigerant flow paths of the heat transfer tubes is set to one or a plurality of rows of the refrigerant flow paths of the heat transfer tubes arranged in a plurality of stages in a meandering manner perpendicular to the main plane of the fins to be configured. heat exchanger characterized by being symmetrically.