JP3762068B2

JP3762068B2 - Heat exchanger and air conditioner

Info

Publication number: JP3762068B2
Application number: JP29252797A
Authority: JP
Inventors: 秀明鈴木; 真一矢ヶ部
Original assignee: Toshiba Carrier Corp
Current assignee: Carrier Japan Corp
Priority date: 1997-10-24
Filing date: 1997-10-24
Publication date: 2006-03-29
Anticipated expiration: 2017-10-24
Also published as: JPH11132684A

Description

【０００１】
【発明の属する技術分野】
本発明は、熱交換器と、この熱交換器を収容配置する、たとえば室内ユニットを構成する空気調和機に関する。
【０００２】
【従来の技術】
近時、図１１に示すような室内熱交換器５を備えた空気調和機の室内ユニットが提供されている。
上記室内熱交換器５は、多数枚のフィンＦが互いに狭小の間隙を存して並設され、これらフィンＦに熱交換パイプＰが貫通されるフィンドチューブタイプであり、側面視で逆Ｖ字状に折り曲げられた前側熱交換器５Ａと後側熱交換器５Ｂとからなる。
【０００３】
冷房運転時に生成されるドレン水は、水とフィンＦとの付着（付着張力）により、前側熱交換器５Ａと後側熱交換器５ＢのフィンＦ下端面を流れて、それぞれの下端部に配置されるドレン皿７，８に受けられるようになっている。
【０００４】
図１２に上記室内熱交換器５の一部を拡大して示すように、この熱交換器５は上端部が風上側から風下側へ向かって斜めに傾斜して配置され、風下側後縁部幅である風下側端縁ｍから熱交換パイプＰまでの距離ｂと、風上側前縁部幅である風上側端縁ｎから熱交換パイプＰまでの距離ａとが、同等（ｂ＝ａ）となるよう寸法設定されている。
【０００５】
【発明が解決しようとする課題】
上記のような構成の室内熱交換器５では、使用初期状態ではフィンＦの表面処理が親水性を有するので、水とフィンＦ間の付着力が強く、冷房運転時に室内熱交換器５を構成するフィンＦ間にドレン水が保持されることがなく、円滑に流下して排水される。
【０００６】
しかしながら、据付け環境や経時的な条件から、長期間使用後は、フィンＦに撥水化物質が付着して表面が撥水状態となり易く、この場合フィンＦ相互間でドレン水を保持するようになる。このドレン水の保水量は、水滴とフィンＦとの接触角が大きいほど多くなる。
【０００７】
そのため、室内熱交換器５の傾斜角度によっては、保水したドレン水がフィンの下端部へ到達する以前で大きく肥大してしまい、フィンＦから滴下するばかりでなく、熱交換空気に載って室内へ飛散する恐れがある。
【０００８】
また、フィンＦはプレス成形された段階では所定部位に三角状の切り込みが設けられた、縦長状をなす。このフィンＦを多数枚隙間を存して並設し、熱交換パイプＰを貫通固定したあと、上記切り込みに沿って折り曲げ、前側熱交換器５Ａと後側熱交換器５Ｂとを成形する。
【０００９】
このような切り込みを予め設けるために、前側熱交換器５Ａと後側熱交換器５Ｂの特に上端部に相当するフィン部位はフラットな状態のまま残されている。また、前側熱交換器５Ａと後側熱交換器５Ｂとをそれぞれ別個に製作し、その後この２つの熱交換器を連結する方法もあるが、この場合もそれぞれの熱交換器５Ａ，５Ｂの上端部は、フィンＦの端面であることからスリットなどを設けることが困難で、フラットな状態のまま残されている。そのため、ここを通過する熱交換空気に対する流通抵抗がほとんど存在せず、局所的に風速増加がある。
【００１０】
その反面、上述の理由から各熱交換器５Ａ，５Ｂの同部位においての排水性が悪化し、フィン面Ｆにドレン水が保水され易い状態となる。一時的に大量のドレン水の保水が生じると、風速増加の影響を受けてドレン水が室内まで飛散する恐れがある。
【００１１】
本発明は上記事情に着目してなされたものであり、その目的とするところは、傾斜して配置される熱交換器であり、フィンに付着するドレン水の排水を円滑にして、局所的な風速増加とドレン水飛散を防止し、信頼性の向上を得る熱交換器および空気調和機を提供しようとするものである。
【００１２】
【課題を解決するための手段】
上記目的を満足するため、本発明の熱交換器は、縦長状のフィンが多数枚、互いに隙間を存して並設され、これらフィンに、フィンの長手方向に沿って複数本の熱交換パイプが所定間隔を存して貫通されるフィンドチューブタイプであり、斜めに傾斜して配置される熱交換器において、上記フィンは、風下側端縁から熱交換パイプまでの距離ｂが、風上側端縁から熱交換パイプまでの距離ａよりも、広く（ｂ＞ａ）なるよう寸法設定されることを特徴とする。
【００１３】
上記目的を満足するため、本発明の空気調和機は、前部および上部に吸込み口が設けられるとともに前面下部に吹出し口が設けられる空気調和機本体と、この空気調和機本体内部に収容配置される熱交換器および室内の熱交換空気を熱交換器に導く断面円形の送風ファンとを具備した空気調和機において、上記熱交換器は、縦長状のフィンが多数枚、互いに隙間を存して並設され、これらフィンに、フィンの長手方向に沿って複数本の熱交換パイプが所定間隔を存して貫通されるフィンドチューブタイプであり、上記前部吸込み口および上部吸込み口と対向するよう側面視で逆Ｖ字状に折り曲げられた前側熱交換器と後側熱交換器とからなり、上記前側熱交換器と後側熱交換器を構成するフィンは、風下側端縁から熱交換パイプまでの距離ｂが、風上側端縁から熱交換パイプまでの距離ａよりも、広く（ｂ＞ａ）なるよう寸法設定されることを特徴とする。
【００１４】
さらに、上記目的を満足するため、本発明の空気調和機は、前部および上部に吸込み口が設けられるとともに前面下部に吹出し口が設けられる空気調和機本体と、この空気調和機本体内部に収容配置される熱交換器および室内の熱交換空気を熱交換器に導く断面円形の送風ファンとを具備した空気調和機において、上記熱交換器は、縦長状のフィンが多数枚、互いに隙間を存して並設され、これらフィンに、フィンの長手方向に沿って複数本の熱交換パイプが所定間隔を存して、かつ風上側列と風下側列とに貫通されるフィンドチューブタイプであり、上記前部吸込み口および上部吸込み口と対向するよう側面視で逆Ｖ字状に折り曲げられた前側熱交換器と後側熱交換器とからなり、上記前側熱交換器と後側熱交換器との折り曲げ部で、かつ前側熱交換器および後側熱交換器の少なくとも一方の熱交換器におけるフィン上端縁と風下側列の最上部熱交換パイプとの間に、熱交換空気に対する流通抵抗となるとともにドレン水を流下案内する補助用突部が設けられることを特徴とする。
【００１５】
さらに、上記目的を満足するため、本発明の空気調和機は、前部および上部に吸込み口が設けられるとともに前面下部に吹出し口が設けられる空気調和機本体と、この空気調和機本体内部に収容配置される熱交換器および室内の熱交換空気を熱交換器に導く断面円形の送風ファンとを具備した空気調和機において、上記熱交換器は、縦長状のフィンが多数枚、互いに隙間を存して並設され、これらフィンに、フィンの長手方向に沿って複数本の熱交換パイプが所定間隔を存して、かつ風上側列と風下側列とに貫通されるフィンドチューブタイプであり、上記前部吸込み口および上部吸込み口と対向するよう側面視で逆Ｖ字状に折り曲げられた前側熱交換器と後側熱交換器とからなり、上記前側熱交換器と後側熱交換器との折り曲げ部で、かつ後側熱交換器上部の風下側列部位は熱交換パイプを除去した熱交換パイプ除去部としたことを特徴とする。
【００１６】
以上のごとく課題を解決する手段を採用することにより、傾斜して配置される熱交換器フィンの表面が撥水化して、冷房運転時にドレン水がブリッジを形成し大量にフィン間に保持されても、ドレン水が流れる風下側後縁部のフィン幅が広いのでドレン水は円滑に排水されて、フィン途中で滴下しなくなる。
【００１７】
また、逆Ｖ字状折り曲げ部での前側熱交換器と後側熱交換器との局所的なドレン水増加を回避して飛散を防止し、熱交換器まわりの風速分布のアンバランス化を防止する。
【００１８】
【発明の実施の形態】
以下、本発明の一実施の形態を、図面を参照して説明する。
図１に示すように、空気調和機本体であるユニット本体１は、前部吸込み口２と上部吸込み口３が開口される。前部吸込み口２の下方部位であるユニット本体１下面部には吹出し口４が開口される。
【００１９】
上記前部，上部吸込み口２，３と対向して、後述するように成形された室内熱交換器１０が配置される。この室内熱交換器１０に覆われるようにして断面円形状の送風ファンである横流ファン６が配置される。
【００２０】
上記室内熱交換器１０の前部側下部は前部ドレンパン７に、後部側下部は後部ドレンパン８に挿入される。これら前部ドレンパン７と後部ドレンパン８は、図示しない連通路を介して連通される。
【００２１】
上部吸込み口３の背面側端部に後板１２の上端部が連結され、後部ドレンパン８部位から横流ファン６側部を介して最下部は吹出し口４に亘るように延設される。そして、前部ドレンパン７部位下面と、横流ファン６側部から吹出し口４に亘る後板１２一部とで、吹出し案内路Ｓが形成される。
【００２２】
つぎに、上記室内熱交換器１０について詳述する。
この室内熱交換器１０は、逆Ｖ字状に形成される主熱交換器９と、直状で主熱交換器一部に沿って設けられる補助熱交換器１１との組合わせ体からなる。
【００２３】
上記主熱交換器９は、はじめ円弧状部と直状部とが互いの端部を境に連結された連結体として成形される。これら円弧状部と直状部との連結部には三角状の切込みが形成されていて、実際の連結部分はわずかでしかない。この連結部から直状部を所定角度に折り曲げることによって、逆Ｖ字状に形成される。
【００２４】
そして、ユニット本体１に主熱交換器９が組み込まれた状態で、円弧状部が前面側に位置するところから、この部分を前側熱交換器１０Ａと呼び、これよりも後部に位置する直状部を後側熱交換器１０Ｂと呼ぶ。
【００２５】
主熱交換器９および補助熱交換器１１ともに、互いに狭小の隙間を存して並設される多数枚の放熱フィンＦと、これら放熱フィンＦを貫通し拡管手段によって嵌着される熱交換パイプＰとの、いわゆるフィンドチューブタイプである。
【００２６】
主熱交換器９は、前側熱交換器１０Ａと後側熱交換器１０Ｂの長手方向に亘って熱交換パイプＰが２列、互いの列が一定の間隔を存して整列されるとともに、互いの列ではいわゆる千鳥状に位置をずらして設けられる。
【００２７】
熱交換パイプＰは、直状部分が長いＵ字状管であり、そのＵ字状部は並設されるフィンＦの一側端から突出する。他端開口部はフィンＦの他側端から突出しており、これら熱交換パイプの開口端はＵベンドや三方ベンドあるいはジャンパパイプで接続される。
【００２８】
前側熱交換器１０Ａにおける熱交換パイプＰ列のうち、前部吸込み口２に対向する列が熱交換空気の導入側となるので風上側列Ｕｐ、横流フアンと対向する側の列が空気導出側に相当するので風下側列Ｄｐと呼ぶ。
【００２９】
同様に、後側熱交換器１０Ｂにおける熱交換パイプＰ列も、上部吸込み口３に対向する列が熱交換空気の導入側となるので風上側列Ｕｐ、横流フアン６と対向する側の列が空気導出側に相当するので風下側列Ｄｐと呼ぶ。
【００３０】
したがって本実施の形態では、前側熱交換器１０Ａの下端部付近を除き、前側および後側熱交換器１０Ａ，１０Ｂのいずれも風上側が上側になり、風下側が下側となっている。すなわち、重力方向と熱交換器を流れる風の方向とが一致している。
【００３１】
また、前側熱交換器１０Ａと後側熱交換器１０Ｂは、これらが前部吸込み口２と上部吸込み口３とに対向しているところから、それぞれの熱交換器１０Ａ，１０Ｂの上端部は風上側から風下側へ傾斜していることになる。
【００３２】
図２に模式的に示すように、風上側列Ｕｐの熱交換パイプＰ相互間と、風下側列Ｄｐの熱交換パイプＰ相互間には、切り起こし部であるスリット形切り起こし片１３が設けられる。また、風上側列Ｕｐと風下側列Ｄｐとの列間にも切り起こし部であるスリット形切り起こし片１４が設けられる。
【００３３】
そして上記フィンＦは、フィンＦの風下側後縁部幅である風下側端縁ｍから風下側列Ｄｐの熱交換パイプＰ周縁までの距離ｂが、風上側前縁部幅であるフィンＦの風上側端縁ｎから風上側列Ｕｐの熱交換パイプＰ周縁までの距離ａよりも広く（ｂ＞ａ）なるよう寸法設定される。
【００３４】
なお説明すれば、フィンＦとして、その幅寸法は従来より用いられるフィンと同一であり、従来はフィンの中心から均等に振り分けられた位置にある熱交換パイプＰとスリット片１３，１４の位置が、全体的に風上側へシフトされるものである。
【００３５】
しかして、冷凍サイクル運転にともなって横流フアン６が回転駆動されると、前部，上部吸込み口２，３から室内空気がユニット本体１内に吸込まれる。熱交換空気は、前部吸込み口２と対向して配置される前側熱交換器１０Ａを流通して熱交換をなすとともに、上部吸込み口３と対向して配置される補助熱交換器１１と後側熱交換器１０Ｂを流通して熱交換する。
【００３６】
これら熱交換器１０Ａ，１０Ｂ，１１と熱交換した熱交換空気は、横流フアン６から吹出し案内路Ｓを介して吹出し口４から吹出され、よって室内の空気調和をなす。
【００３７】
なお、上記前側熱交換器１０Ａおよび後側熱交換器１０Ｂにおいては、その上端部が風上側から風下側へ向かって斜めに傾斜して配置されるので、フィンＦの風上側で生成されるドレン水も円滑に風下側に導かれる。
【００３８】
ここで、先に述べたように、フィンＦは風上側前縁部のフィン幅ｂが、風下側後縁部のフィン幅ａよりも広く（ｂ＞ａ）形成され、かつ上端部が風上側から風下側へ向かって傾斜しているので、風上側前縁部で生成されたドレン水は傾斜に沿って風下側後縁部に導かれ、さらにここから保水されることなく円滑に下部側へ流下する。
【００３９】
したがって、ドレン水はフィンＦの最下端部へ到達する途中でフィンＦから滴下することなく前部，後部ドレン皿７，８へ導かれ、室内への飛散は確実に防止される。
【００４０】
また、風上側前縁部のフィン幅ａが狭いので通風抵抗が減少し、風量低下が防止されて、フィンＦの伝熱性能および送風性能を損なうことなくドレン水を円滑に流通させる。
【００４１】
この発明は、以下に述べるような変形例が考えられる。
図３に示すように、室内熱交換器１０を上端部が風上側から風下側へ向かって傾斜された状態で、フィンＦの風下側後縁部幅ｂが風上側前縁部幅ａよりも広いことは勿論、上記フィンＦの風上側列Ｕｐ，風下列側Ｄｐそれぞれの熱交換パイプＰ相互間に切り起こし部１３，１３ａが設けられる。
【００４２】
特に、風下側列Ｄｐの熱交換パイプＰ相互間に設けられる切り起こし部１３ａにおいては、フィン風下側端縁ｍから切り起こし部１３ａ風下側端縁までの距離ｃが、フィン風下側端縁ｍから風下側列Ｄｐの熱交換パイプＰ周縁までの距離ｂよりも狭く（ｃ＜ｂ）なるよう寸法設定される。
【００４３】
しかして、フィンＦの風上側で生成されるドレン水が円滑に風下側に導かれるとともに、フィンＦの風下側上部から流下してきたドレン水は、風下側端縁ｍと風下側列Ｄｐの熱交換パイプＰとの間隔が広いところから円滑に流下し、その流下速度が速まる。
【００４４】
ところが、この熱交換パイプＰの下部にある切り起こし部１３ａではフィン後端縁ｍとの距離ｃが狭められているので、この部分で一旦保水されドレン水の流下速度が適宜規制されることになり、フィンＦ下端縁まで流下する途中から滴下することはない。
【００４５】
すなわち、フィンＦに生じたドレン水がフィンＦ表面を伝わって流れる場合、邪魔がなく円滑に流下すると、その流下速度が速まり、風下側端縁ｍからそのまま滴下する。
【００４６】
ところが、切り起こし部１３ａがあると、この部分において、ドレン水の落下が一時的に止められ、再び切り起こし部１３ａの下部からフィンＦ上を流れ落ちる際にはその流下速度が低く抑えられるため、そのまま風下側端縁ｍから空中に飛び出しまうことなく風下側端縁ｍに沿ってドレンパンのある斜め下方に伝わって落ちて行く。
【００４７】
図４に示すように、室内熱交換器１０を傾斜させた状態で、フィンＦの風下側後縁部幅ｂが風上側前縁部幅ａよりも広いことは勿論、上記フィンＦの風上側列Ｕｐと風下列側Ｄｐそれぞれの熱交換パイプＰ相互間に切り起こし部１３が設けられる。
【００４８】
そして、ここでは風上側列Ｕｐの熱交換パイプＰと風下側列Ｄｐの熱交換パイプＰ相互間に、風上側に向かって開放する片側切り起こし片１４ａが設けられている。この片側切り起こし片１４ａの長さは風下側列Ｄｐの熱交換パイプＰの相互間隔と略同じ長さを有する。
【００４９】
したがって、フィンＦの風上側列Ｕｐの熱交換パイプＰから流れてきたドレン水は、片側切り起こし片１４ａの切り起こし部分に沿って流れ、この下端から風下側列Ｄｐの熱交換パイプＰ側へ導かれる。
【００５０】
すなわち、片側切り起こし片１４ａは風上側で生成されるドレン水が直接的に風下側に流下するのを阻止するとともに、ドレン水の流下速度をそそぐことができる。さらに、片側切り起こし片１４ａは、熱交換器の傾斜とほぼ平行に設けられているため、この片側切り起こし片１４ａを伝わって流れるドレン水は真下（重力方向）ではなく、ドレンパンの位置する方向である、熱交換器の傾斜方向（斜め下）方向へと流され、真下方向へのドレン水の流れが抑制される。
【００５１】
このため、風上側列Ｕｐの熱交換パイプＰ付近に生じたドレン水は、風下側端縁ｎに到達するまでにドレンパンのある斜め下方向へと流れ、熱交換器上部の風下側端縁ｍに集まるドレン水の量を減らし、風下側のフィンＦ途中からの滴下を防止する。
【００５２】
なお、片側切り起こし片１４ａは、約１mm程度の高さであり、ドレン水はこの切り起こし部分の孔を通過してフィンＦの裏面へとそのまま通り抜けることはほとんどなく、この部分に到達したドレン水は片側切り起こし片１４ａの表面側を片側切り起こし片１４ａに沿って流れる。
【００５３】
また、図５に示すように、フィンＦを傾斜させた状態で、フィンＦの風下側後縁部幅ｂが風上側前縁部幅ａよりも広いことは勿論、上記フィンＦには風下側端縁ｍから風下側列Ｄｐの熱交換パイプＰまでの間に、この長手方向に沿ってフィンＦの表面（上面）へ突出するビード部１５を設けてもよい。
【００５４】
フィンＦの風下側後縁部分を流れるドレン水は、上記ビード部１５に沿って流下し、よってフィンＦの中途部から直接滴下することがなく、円滑に排水処理される。また、通風抵抗も大幅に増加しないので伝熱性能を損なうことがなく、しかもビード部１５によるフィンＦの補強を得る。
【００５５】
さらに、図６では、熱交換器１０を傾斜させた状態で、フィンＦの風下側後縁部幅ｂが風上側前縁部幅ａよりも広いことは勿論、風下側後端部幅ｂはフィン上部幅ｂ_a から下部幅ｂ_b に亘って漸次広くなるよう形成される。
【００５６】
すなわち、当然ながらドレン水はフィンＦの上部から下部へ行くほど流れ込むドレン水が合流して、流下量が多くなる。ここでは、風下側後端部の上部幅ｂ_a から下部幅ｂ_b に亘って漸次広く形成してあるので、ドレン水はこの漸次幅広部分において合流し、かつ円滑に流下してフィンの中途部から直接滴下することがなく排水処理される。
【００５７】
つぎに、本発明における他の実施の形態について説明する。
再び図１に示すように、上記室内熱交換器１０において、上記前側熱交換器１０Ａと後側熱交換器１０Ｂとの折り曲げ部２０で、かつ前側熱交換器１０Ａにおける上端部には補助用突部３０が設けられる。
【００５８】
図７（Ａ）に、上記補助用突部３０を拡大して示す。この補助用突部３０は、フィンＦの長手方向端縁に沿って、互いに並行に設けられ、かつ漸次長さが異なる複数のルーバ状切り起こし片３０ａから構成される。これら切り起こし片３０ａの短辺は熱交換パイプＰおよびフィンＦ上端縁に沿い、かつ長辺はフィンＦの側端縁に沿う。
【００５９】
あるいは、同図（Ｂ）に拡大して示すように、上記補助用突部３０として、フィンＦの長手方向端縁に沿って、互いに並行に設けられ、かつ漸次長さが異なる複数のスリット状切り起こし片３０ｂから構成される。これら切り起こし片３０ｂの短辺は熱交換パイプＰおよびフィンＦ上端縁に沿い、かつ長辺はフィンＦの側端縁に沿う。
【００６０】
あるいは、同図（Ｃ）に拡大して示すように、上記補助用突部３０として、フィンＦの長手方向端縁に沿って、互いに並行に設けられ、かつ漸次長さが異なる複数のバーリング状切り起こし片３０ｃから構成される。これら切り起こし片３０ｃの短辺は熱交換パイプＰおよびフィンＦ上端縁に沿い、かつ長辺はフィンＦの側端縁に沿う。
【００６１】
あるいは、同図（Ｄ）に拡大して示すように、上記補助用突部３０として、フィンＦの長手方向端縁に沿って、互いに並行に設けられ、かつ漸次長さが異なる複数の突条３０ｄから構成される。これら突条３０ｄの短辺は熱交換パイプＰおよびフィンＦ上端縁に沿い、かつ長辺はフィンＦの側端縁に沿う。
【００６２】
いずれにしても、逆Ｖ字折り曲げ部２０近傍である前側熱交換器１０Ａの上端部に補助用突部３０を設けたので、特にこの部分で生成されたドレン水を円滑に下方へ流下させる。
【００６３】
なお、図７（Ａ）ないし（Ｄ）では、前側熱交換器１０Ａの上端部のフィンＦの面積を後側熱交換器１０Ｂの上端部のフィンＦの面積よりも広く形成しているところから、前側熱交換器１０Ａにのみ補助用突部３０を設けたが、逆に後側熱交換器１０Ｂの上端部のフィンＦの面積を広く形成した場合には、後側熱交換器１０Ａに補助用突部３０を設けるようにすればよい。また熱交換器１０Ａ，１０Ｂ両方の上端部にそれぞれ補助用突部３０を設けてもよい。
【００６４】
さらに他の部分が大量のドレン水を保水したときでも、この折り曲げ部２０にも補助用突部３０が通風抵抗となり、室内熱交換器１０まわりの風速分布の極端なアンバランスが防止され、Ｖ字状折り曲げ部２０付近での局所的な風速増加を回避して、ドレン水の室内飛散を防止する。
【００６５】
図８に、本発明におけるさらに他の実施の形態を示す。
後述する後側熱交換器１０Ｂの一部を除いて、空気調和機の構成は先に図１において説明したものと全く同一であり、ここでは同番号を付して新たな説明は省略する。
【００６６】
上記室内熱交換器１０を構成する前側熱交換器１０Ａと後側熱交換器１０Ｂとの折り曲げ部２０で、かつ後側熱交換器１０Ｂの風下側列Ｄｐの最上部は、熱交換パイプ除去部４０となす。
【００６７】
すなわち、これまで説明したきた室内熱交換器１０における後側熱交換器１０Ｂでは、その風下側列Ｄｐには上部から下部に亘って所定間隔を存して熱交換パイプＰが貫通していたが、この発明は特に上部においてのみ熱交換パイプを貫通せずに除去する。
【００６８】
上記熱交換パイプ除去部４０は、ここではフィンＦに対する何らの加工もせず、凹凸の全くないフラット部となす。
図９および図１０（Ａ）に示すように、熱交換パイプ除去部４０Ａとして、熱交換空気の流通方向に対して直交する方向に設けられる長さの異なる複数のスリット形切り起こし片４０ａ，４０ｂから構成してもよい。
【００６９】
なお説明すれば、両側のスリット形切り起こし片４０ａは互いに全長が短く、かつ上下両端の位置を揃えて設けられる。また、真ん中のスリット形切り起こし片４０ａは、両側でかつ上下の切り起こし片４０ａのほぼ半分の長さに亘るような全長を有する。
【００７０】
あるいは、図１０（Ｂ）に示すように、熱交換パイプ除去部４０Ｂとして、熱交換空気の流通方向に対して直交する方向に設けられる長さの異なる複数のルーバ形切り起こし片４０ｃ，４０ｄから構成してもよい。
【００７１】
なお説明すれば、両側のルーバ形切り起こし片４０ｃは互いに全長が短く、かつ上下両端の位置を揃えて設けられる。また、真ん中のルーバ形切り起こし片４０ｄは、両側でかつ上下の切り起こし片４０ｃのほぼ半分の長さに亘るような全長を有する。
【００７２】
いずれにしても、後側熱交換器１０Ｂに逆Ｖ字状折り曲げ部２０近傍で、風下側列Ｄｐの最上部には熱交換パイプＰは存在しない。代って、フラット部４０を形成し、もしくは切り起こし片４０ａ〜４０ｄを備えたことにより、風下列側Ｄｐ最上部のフィンＦ面を流下するドレン水の流路が十分に確保される。したがって、逆Ｖ字状折り曲げ部２０近傍からのドレン水飛散の危険性が低下する。
【００７３】
さらに、同部位に熱交換空気の流通方向に直交する方向に隣り合う長さの異なるスリット形切り起こし片４０ａ，４０ｂもしくはルーバ形切り起こし片４０ｃ，４０ｄが多数形成されることにより、ドレン水はこれら切り起こし片４０ａ〜４０ｄに沿って円滑に下方へ流れる。
【００７４】
したがって、ドレン水保水時でも、熱交換器まわりの風速分布のアンバランス化が防止され、信頼性の向上を得る。フィンＦの同部位面に大量のドレン水の保水が生じた場合でも局所的な増加を回避してドレン水の飛散を防止し、熱交換器まわりの風速分布のアンバランス化を防止する。
【００７５】
【発明の効果】
以上説明したように本発明では、市場環境によってフィン表面が撥水化し、冷房運転時にドレン水がブリッジを形成して大量にフィン間に保持されてもドレン水が流れる風下側後縁部のフィン幅が広いのでドレン水は円滑に排水されて、フィン途中で滴下することがなく、排水処理効率の向上を得られるという効果を奏する。
【００７６】
さらに、本発明では、熱交換器のフィン面に大量のドレン水の保水が生じた場合、逆Ｖ字状折り曲げ部近傍部位での局所的な増加を回避してドレン水の飛散を防止し、かつ熱交換器まわりの風速分布のアンバランス化を防止するなどの効果を奏する。
【図面の簡単な説明】
【図１】本発明の一実施の形態を示す、熱交換器を組み込んだ空気調和機室内ユニットの概略の断面図。
【図２】同実施の形態の、熱交換器一部を拡大した図。
【図３】他の実施の形態の、熱交換器一部を拡大した図。
【図４】さらに他の実施の形態の、熱交換器一部を拡大した図。
【図５】さらに他の実施の形態の、熱交換器一部を拡大した図。
【図６】さらに他の実施の形態の、熱交換器一部を拡大した図。
【図７】（Ａ）は、図１に示す熱交換器の一部である補助用突部を拡大した図。
（Ｂ）ないし（Ｄ）は、互いに異なる補助用突部を説明する図。
【図８】さらに異なる実施の形態を示す、熱交換器を組み込んだ空気調和機室内ユニットの概略の断面図。
【図９】さらに異なる実施の形態を示す、熱交換器を組み込んだ空気調和機室内ユニットの概略の断面図。
【図１０】（Ａ）および（Ｂ）は、互いに異なる切り起こし部形状を説明する図。
【図１１】従来の、熱交換器を組み込んだ空気調和機室内ユニットの概略の断面図。
【図１２】従来の、熱交換器一部を拡大した図。
【符号の説明】
１０…室内熱交換器、
Ｆ…フィン、
Ｐ…熱交換パイプ、
Ｕｐ…風上側列、
Ｄｐ…風下側列、
１４ａ…片側切り起こし片、
３０…補強用突部、
４０…熱交換パイプ除去部。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat exchanger and an air conditioner that accommodates and arranges the heat exchanger, for example, an indoor unit.
[0002]
[Prior art]
Recently, an indoor unit of an air conditioner including an indoor heat exchanger 5 as shown in FIG. 11 has been provided.
The indoor heat exchanger 5 is a finned tube type in which a large number of fins F are arranged side by side with a narrow gap therebetween, and the heat exchange pipe P is penetrated through the fins F. It comprises a front heat exchanger 5A and a rear heat exchanger 5B that are bent into a shape.
[0003]
The drain water generated during the cooling operation flows through the fin F lower end surfaces of the front heat exchanger 5A and the rear heat exchanger 5B due to adhesion (adhesion tension) between the water and the fins F, and is disposed at the lower ends of the fins. The drain pans 7 and 8 can be received.
[0004]
As shown in an enlarged view of a portion of the indoor heat exchanger 5 in FIG. 12, the heat exchanger 5 is disposed such that the upper end portion is inclined obliquely from the leeward side toward the leeward side, and the leeward side rear edge portion. The distance b from the leeward side edge m, which is the width, to the heat exchange pipe P, and the distance a, from the windward edge n, which is the width of the windward front edge, to the heat exchange pipe P, are equivalent (b = a). The dimensions are set to be
[0005]
[Problems to be solved by the invention]
In the indoor heat exchanger 5 configured as described above, since the surface treatment of the fins F has hydrophilicity in the initial use state, the adhesion between water and the fins F is strong, and the indoor heat exchanger 5 is configured during cooling operation. The drain water is not held between the fins F to be drained and smoothly flows down.
[0006]
However, due to the installation environment and conditions over time, the water repellent substance adheres to the fins F after a long period of use, and the surface tends to be in a water repellent state. In this case, the drain water is retained between the fins F. Become. The water retention amount of the drain water increases as the contact angle between the water droplet and the fin F increases.
[0007]
Therefore, depending on the inclination angle of the indoor heat exchanger 5, the drained water that has been retained is greatly enlarged before reaching the lower end of the fins, and not only dripping from the fins F but also being placed on the heat exchange air into the room. There is a risk of splashing.
[0008]
Further, the fin F has a vertically long shape in which a triangular notch is provided in a predetermined portion at the stage of press molding. A large number of fins F are provided side by side, and the heat exchange pipe P is penetrated and fixed, and then bent along the notches to form the front heat exchanger 5A and the rear heat exchanger 5B.
[0009]
In order to provide such a cut in advance, the fin portions corresponding to the upper end portions of the front heat exchanger 5A and the rear heat exchanger 5B are left flat. In addition, there is a method in which the front heat exchanger 5A and the rear heat exchanger 5B are separately manufactured, and then the two heat exchangers are connected. In this case as well, the upper ends of the heat exchangers 5A and 5B are connected. Since the portion is an end face of the fin F, it is difficult to provide a slit or the like, and the portion is left flat. Therefore, there is almost no flow resistance with respect to the heat exchange air passing there, and there is a local increase in wind speed.
[0010]
On the other hand, for the reasons described above, the drainage at the same portion of each of the heat exchangers 5A and 5B is deteriorated, and the drain water is easily retained on the fin surface F. If a large amount of drain water is retained temporarily, the drain water may be scattered into the room due to the effect of the increase in wind speed.
[0011]
The present invention has been made by paying attention to the above circumstances, and the object of the present invention is a heat exchanger that is disposed in an inclined manner, smoothing drainage of drain water adhering to the fins, An object of the present invention is to provide a heat exchanger and an air conditioner that prevent an increase in wind speed and splash of drain water and improve reliability.
[0012]
[Means for Solving the Problems]
To satisfy the above purpose, The heat exchanger of the present invention has a vertically long fin. Are arranged in parallel with a gap between them, and a plurality of heat exchange pipes are spaced apart from each other along the longitudinal direction of the fins. Exist and penetrated In a heat exchanger that is a finned tube type and is disposed obliquely, the fins are Leeward side The distance b from the edge to the heat exchange pipe is Upwind It is characterized in that the dimension is set to be wider (b> a) than the distance a from the end edge to the heat exchange pipe.
[0013]
To satisfy the above purpose, The air conditioner of the present invention comprises a front part and An air conditioner body having a suction port at the top and a blowout port at the bottom of the front surface, a heat exchanger accommodated in the air conditioner body, and a circular cross section for guiding indoor heat exchange air to the heat exchanger In the air conditioner provided with the blower fan, the heat exchanger has a large number of vertically long fins arranged in parallel with a gap therebetween, and a plurality of fins are provided along the longitudinal direction of the fins. Heat exchange pipes Exist and penetrated It is a finned tube type, and consists of a front heat exchanger and a rear heat exchanger bent in an inverted V shape in a side view so as to face the front suction port and the upper suction port, and the front heat exchanger The fins constituting the rear heat exchanger are dimensioned so that the distance b from the leeward edge to the heat exchange pipe is wider (b> a) than the distance a from the leeward edge to the heat exchange pipe. It is characterized by being.
[0014]
further, To satisfy the above purpose, The air conditioner of the present invention comprises a front part and An air conditioner body having a suction port at the top and a blowout port at the bottom of the front surface, a heat exchanger accommodated in the air conditioner body, and a circular cross section for guiding indoor heat exchange air to the heat exchanger In the air conditioner provided with the blower fan, the heat exchanger has a large number of vertically long fins arranged in parallel with a gap therebetween, and a plurality of fins are provided along the longitudinal direction of the fins. The heat exchange pipes are spaced apart and the leeward row and leeward side Penetrated into a row It is a finned tube type, and consists of a front heat exchanger and a rear heat exchanger bent in an inverted V shape in a side view so as to face the front suction port and the upper suction port, and the front heat exchanger Bending part with the rear heat exchanger and the front heat exchanger and Rear heat exchanger At least one of the heat exchangers Between the upper end edge of the fin and the uppermost heat exchange pipe in the leeward side row, an auxiliary projection that provides flow resistance to the heat exchange air and guides the drain water down is provided.
[0015]
further, To satisfy the above purpose, The air conditioner of the present invention comprises a front part and An air conditioner body having a suction port at the top and a blowout port at the bottom of the front surface, a heat exchanger accommodated in the air conditioner body, and a circular cross section for guiding indoor heat exchange air to the heat exchanger In the air conditioner provided with the blower fan, the heat exchanger has a large number of vertically long fins arranged in parallel with a gap therebetween, and a plurality of fins are provided along the longitudinal direction of the fins. Heat exchange pipes are spaced apart and the leeward and leeward rows And penetrated It is a finned tube type, and consists of a front heat exchanger and a rear heat exchanger bent in an inverted V shape in a side view so as to face the front suction port and the upper suction port, and the front heat exchanger The leeward side row part at the upper part of the rear heat exchanger is a heat exchange pipe removal part from which the heat exchange pipe is removed, which is a bent part with the rear heat exchanger.
[0016]
By adopting the means for solving the problems as described above, the surface of the heat exchanger fins arranged in an inclined manner becomes water repellent, and the drain water forms a bridge during cooling operation and is held between the fins in large quantities. However, since the fin width of the leeward side trailing edge where the drain water flows is wide, the drain water is smoothly drained and does not drip in the middle of the fin.
[0017]
In addition, local drain water increase between the front heat exchanger and the rear heat exchanger at the inverted V-shaped bent part is avoided to prevent scattering, and unbalanced wind speed distribution around the heat exchanger is prevented. To do.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Less than, The present invention One embodiment will be described with reference to the drawings.
As shown in FIG. 1, the unit main body 1 which is an air conditioner main body has a front suction port 2 and an upper suction port 3 opened. A blowout port 4 is opened at the lower surface of the unit main body 1 which is a lower part of the front suction port 2.
[0019]
Opposed to the front and upper suction ports 2 and 3, an indoor heat exchanger 10 formed as described later is disposed. A cross flow fan 6, which is a blower fan having a circular cross section, is disposed so as to be covered with the indoor heat exchanger 10.
[0020]
The lower part on the front side of the indoor heat exchanger 10 is inserted into the front drain pan 7, and the lower part on the rear side is inserted into the rear drain pan 8. The front drain pan 7 and the rear drain pan 8 are communicated with each other via a communication path (not shown).
[0021]
The upper end of the rear plate 12 is connected to the rear side end of the upper suction port 3, and the lowermost portion extends from the rear drain pan 8 site through the side of the cross-flow fan 6 to the outlet 4. Then, the blowing guide path S is formed by the lower surface of the front drain pan 7 and the part of the rear plate 12 extending from the side of the cross flow fan 6 to the blowing port 4.
[0022]
Next, the indoor heat exchanger 10 will be described in detail.
The indoor heat exchanger 10 includes a combination of a main heat exchanger 9 formed in an inverted V shape and an auxiliary heat exchanger 11 provided in a straight shape along a part of the main heat exchanger.
[0023]
The main heat exchanger 9 is formed as a connected body in which an arc-shaped portion and a straight-shaped portion are connected to each other at the end. Triangular cuts are formed at the connecting portion between the arc-shaped portion and the straight portion, and there are only a few actual connecting portions. By bending the straight portion from the connecting portion at a predetermined angle, an inverted V shape is formed.
[0024]
Then, in a state where the main heat exchanger 9 is incorporated in the unit main body 1, the arc-shaped portion is located on the front side, and this portion is referred to as a front heat exchanger 10A, and a straight shape located on the rear side of this portion. This part is referred to as a rear heat exchanger 10B.
[0025]
Both the main heat exchanger 9 and the auxiliary heat exchanger 11 have a large number of radiating fins F arranged side by side with a narrow gap therebetween, and a heat exchanging pipe that penetrates these radiating fins F and is fitted by a pipe expanding means. It is a so-called find tube type with P.
[0026]
The main heat exchanger 9 has two rows of heat exchange pipes P and a row of the heat exchange pipes P arranged at a predetermined interval along the longitudinal direction of the front heat exchanger 10A and the rear heat exchanger 10B. In this row, the positions are shifted in a so-called staggered pattern.
[0027]
The heat exchange pipe P is a U-shaped tube having a long straight portion, and the U-shaped portion protrudes from one side end of the fins F arranged in parallel. The other end opening projects from the other end of the fin F, and the open ends of these heat exchange pipes are connected by a U-bend, a three-way bend, or a jumper pipe.
[0028]
Of the heat exchange pipes P row in the front heat exchanger 10A, the row facing the front suction port 2 is the heat exchange air introduction side, so the row on the side facing the upwind row Up and the cross flow fan is the air outlet side. Is called a leeward side row Dp.
[0029]
Similarly, in the heat exchange pipe P row in the rear heat exchanger 10B, the row opposite to the upper suction port 3 is the heat exchange air introduction side, so that the row on the side facing the upwind row Up and the cross flow fan 6 is different. Since it corresponds to the air outlet side, it is called a leeward side row Dp.
[0030]
Therefore, in the present embodiment, except for the vicinity of the lower end portion of the front heat exchanger 10A, both the front and rear heat exchangers 10A and 10B have the windward side on the upper side and the leeward side on the lower side. That is, the direction of gravity coincides with the direction of the wind flowing through the heat exchanger.
[0031]
Further, since the front heat exchanger 10A and the rear heat exchanger 10B are opposed to the front suction port 2 and the upper suction port 3, the upper ends of the respective heat exchangers 10A and 10B are wind-driven. It is inclined from the upper side to the leeward side.
[0032]
As schematically shown in FIG. 2, slit-shaped cut-and-raised pieces 13 serving as cut-and-raised portions are provided between the heat exchange pipes P of the leeward row Up and between the heat exchange pipes P of the leeward row Dp. It is done. In addition, slit-shaped cut and raised pieces 14 that are cut and raised portions are also provided between the windward row Up and the leeward row Dp.
[0033]
The fin F has a distance b from the leeward side edge m which is the width of the leeward trailing edge of the fin F to the heat exchange pipe P periphery of the leeward side row Dp of the fin F whose width is the windward front edge width. The dimension is set to be wider (b> a) than the distance a from the windward edge n to the periphery of the heat exchange pipe P in the windward row Up.
[0034]
In other words, the width of the fin F is the same as that of the fin conventionally used, and the positions of the heat exchange pipe P and the slit pieces 13 and 14 at positions that are conventionally distributed evenly from the center of the fin are as follows. The whole is shifted to the windward side.
[0035]
Thus, when the cross flow fan 6 is rotationally driven in accordance with the refrigeration cycle operation, room air is sucked into the unit body 1 from the front and upper suction ports 2 and 3. The heat exchange air flows through the front heat exchanger 10A disposed opposite to the front suction port 2 to perform heat exchange, and the auxiliary heat exchanger 11 disposed opposite to the upper suction port 3 and the rear Heat is exchanged through the side heat exchanger 10B.
[0036]
The heat exchange air that has exchanged heat with these heat exchangers 10A, 10B, and 11 is blown out from the blowout port 4 through the blowout guide path S from the cross flow fan 6, and thus air conditioning in the room.
[0037]
Note that, in the front heat exchanger 10A and the rear heat exchanger 10B, the upper ends thereof are arranged obliquely from the windward side toward the leeward side, so that the drain generated on the windward side of the fin F is generated. Water is also smoothly guided to the leeward side.
[0038]
Here, as described above, the fin F is formed so that the fin width b of the windward front edge is wider than the fin width a of the leeward rear edge (b> a), and the upper end is on the windward side. Since the water is inclined toward the leeward side, the drain water generated at the leeward front edge is guided to the leeward rear edge along the slope, and further smoothly retained from here without being retained. Flow down.
[0039]
Therefore, the drain water is guided to the front and rear drain dishes 7 and 8 without dripping from the fin F in the middle of reaching the lowermost end portion of the fin F, and scattering into the room is reliably prevented.
[0040]
Moreover, since the fin width a of the windward front edge is narrow, the ventilation resistance is reduced, the air volume is prevented from being lowered, and the drain water is smoothly circulated without impairing the heat transfer performance and the air blowing performance of the fin F.
[0041]
The present invention may be modified as described below.
As shown in FIG. 3, in the state where the upper end of the indoor heat exchanger 10 is inclined from the leeward side toward the leeward side, the leeward rear edge width b of the fin F is larger than the windward front edge width a. Of course, the raised portions 13 and 13a are provided between the heat exchange pipes P on the windward side Up and the leeward side Dp of the fins F.
[0042]
In particular, in the cut and raised portion 13a provided between the heat exchange pipes P of the leeward side row Dp, the distance c from the fin leeward side edge m to the cut and raised portion 13a leeward side edge is the fin leeward side edge m. The dimension is set to be narrower (c <b) than the distance b from the heat exchange pipe P periphery of the leeward side row Dp.
[0043]
Thus, the drain water generated on the leeward side of the fin F is smoothly guided to the leeward side, and the drain water flowing down from the leeward upper side of the fin F is heated by the leeward side edge m and the leeward side row Dp. The air flows smoothly from a wide space with the exchange pipe P, and the flow speed increases.
[0044]
However, in the cut-and-raised part 13a at the lower part of the heat exchange pipe P, the distance c from the fin rear end edge m is narrowed, so that the water is once retained in this part and the flow rate of the drain water is appropriately regulated. It does not drop from the middle of flowing down to the lower edge of the fin F.
[0045]
That is, when the drain water generated in the fin F flows along the surface of the fin F and smoothly flows down without any obstruction, the flow speed increases and drops directly from the leeward side edge m.
[0046]
However, if there is a cut-and-raised portion 13a, the drain water is temporarily stopped in this portion, and when the flow falls on the fin F from the lower portion of the cut-and-raised portion 13a again, the flow speed is kept low. As it is, it does not jump out from the leeward side edge m into the air, but travels down along the leeward side edge m to the obliquely downward direction where there is a drain pan.
[0047]
As shown in FIG. 4, in the state in which the indoor heat exchanger 10 is inclined, the leeward side rear edge width b of the fin F is of course wider than the windward front edge width a. A cut-and-raised portion 13 is provided between the heat exchange pipes P of the row Up and the leeward row side Dp.
[0048]
And here, the one-side cut-and-raised piece 14a opened toward the windward side is provided between the heat exchange pipe P of the windward row Up and the heat exchange pipe P of the leeward row Dp. The length of this one-side cut and raised piece 14a is substantially the same as the mutual interval of the heat exchange pipes P in the leeward side row Dp.
[0049]
Accordingly, the drain water flowing from the heat exchange pipe P in the upwind row Up of the fin F flows along the cut and raised portion of the one side cut and raised piece 14a, and from this lower end to the heat exchange pipe P side of the leeward side row Dp. Led.
[0050]
That is, the one-side cut-and-raised piece 14a can prevent the drain water generated on the windward side from flowing down directly to the leeward side and can increase the flow speed of the drain water. Furthermore, since the one-side cut and raised piece 14a is provided substantially parallel to the inclination of the heat exchanger, the drain water flowing through this one-side cut and raised piece 14a is not directly below (in the direction of gravity) but in the direction in which the drain pan is located. The flow of drain water in the downward direction of the heat exchanger is suppressed, and the flow of drain water in the downward direction is suppressed.
[0051]
For this reason, the drain water generated in the vicinity of the heat exchange pipe P in the windward row Up flows in an obliquely downward direction with a drain pan before reaching the leeward side edge n, and the leeward side edge m at the top of the heat exchanger. The amount of drain water that collects in the air is reduced, and dripping from the fin F on the leeward side is prevented.
[0052]
The one side cut and raised piece 14a has a height of about 1 mm, and the drain water hardly passes through the hole of the cut and raised portion and passes through the back surface of the fin F as it is. The water is cut and raised on one side of the piece 14a and flows along the piece 14a.
[0053]
In addition, as shown in FIG. 5, in the state where the fin F is inclined, the fin F has a leeward rear edge width b wider than the windward front edge width a. Between the edge m and the heat exchange pipe P in the leeward side row Dp, a bead portion 15 that protrudes toward the surface (upper surface) of the fin F along the longitudinal direction may be provided.
[0054]
The drain water flowing along the leeward rear edge portion of the fin F flows down along the bead portion 15, and is thus not dripped directly from the midway portion of the fin F, and is smoothly drained. Further, since the ventilation resistance does not increase significantly, the heat transfer performance is not impaired, and the reinforcement of the fin F by the bead portion 15 is obtained.
[0055]
Further, in FIG. 6, in the state where the heat exchanger 10 is inclined, the leeward side trailing edge width b of the fin F is of course wider than the windward front edge width a, and the leeward side trailing edge width b is Fin top width b _a To bottom width b _b It is formed so as to gradually become wide over the range.
[0056]
That is, of course, the drain water flows into the drain water as it goes from the upper part to the lower part of the fins F, and the amount of the drain water increases. Here, the upper width b of the leeward rear end portion _a To bottom width b _b Since the drain water is formed so as to gradually widen, the drain water merges in the gradually wide portion, and flows smoothly and is drained without being directly dropped from the middle part of the fin.
[0057]
Next, Other embodiments of the present invention Will be described.
As shown in FIG. 1 again, in the indoor heat exchanger 10, the bent portion 20 between the front heat exchanger 10A and the rear heat exchanger 10B, and the upper end of the front heat exchanger 10A has an auxiliary protrusion. A part 30 is provided.
[0058]
FIG. 7A shows the auxiliary protrusion 30 in an enlarged manner. The auxiliary protrusions 30 are formed of a plurality of louver-like cut-and-raised pieces 30a that are provided in parallel to each other along the longitudinal edge of the fin F and that have gradually different lengths. The short sides of the cut and raised pieces 30a are along the upper end edges of the heat exchange pipe P and the fin F, and the long sides are along the side edge of the fin F.
[0059]
Alternatively, as shown in the enlarged view (B) of the drawing, the auxiliary protrusions 30 are provided in parallel with each other along the longitudinal edges of the fins F, and a plurality of slit shapes having progressively different lengths. It is composed of cut and raised pieces 30b. The short sides of the cut and raised pieces 30b are along the upper end edges of the heat exchange pipe P and the fin F, and the long sides are along the side edge of the fin F.
[0060]
Alternatively, as shown in the enlarged view (C) of the figure, the auxiliary protrusions 30 are provided in parallel with each other along the longitudinal edges of the fins F, and a plurality of burring shapes having different gradual lengths. The cut and raised piece 30c is used. The short sides of the cut and raised pieces 30c are along the upper end edges of the heat exchange pipe P and the fin F, and the long sides are along the side edge of the fin F.
[0061]
Alternatively, as shown in the enlarged view (D) of the drawing, the auxiliary protrusions 30 are provided in parallel with each other along the longitudinal edges of the fins F, and a plurality of protrusions having progressively different lengths. 30d. The short sides of the protrusions 30d are along the upper end edges of the heat exchange pipe P and the fin F, and the long sides are along the side edge of the fin F.
[0062]
In any case, since the auxiliary protrusion 30 is provided at the upper end portion of the front heat exchanger 10A in the vicinity of the inverted V-shaped bent portion 20, the drain water generated particularly in this portion flows down smoothly.
[0063]
7A to 7D, the area of the fin F at the upper end of the front heat exchanger 10A is formed wider than the area of the fin F at the upper end of the rear heat exchanger 10B. The auxiliary protrusion 30 is provided only on the front heat exchanger 10A. Conversely, when the area of the fin F at the upper end of the rear heat exchanger 10B is wide, the auxiliary heat exchanger 10A is provided with an auxiliary. What is necessary is just to make the protrusion 30 for provision. Moreover, you may provide the protrusion 30 for auxiliary | assistant in the upper end part of both heat exchanger 10A, 10B, respectively.
[0064]
Further, even when the other part holds a large amount of drain water, the auxiliary protrusion 30 also becomes a draft resistance in the bent part 20, and an extreme imbalance of the wind speed distribution around the indoor heat exchanger 10 is prevented. A local increase in the wind speed in the vicinity of the letter-shaped bent portion 20 is avoided, and the indoor splash of drain water is prevented.
[0065]
In FIG. Still other implementations of the invention The form is shown.
Except for a part of the rear heat exchanger 10B, which will be described later, the configuration of the air conditioner is exactly the same as that described above with reference to FIG.
[0066]
The bent portion 20 of the front heat exchanger 10A and the rear heat exchanger 10B constituting the indoor heat exchanger 10 and the uppermost part of the leeward side row Dp of the rear heat exchanger 10B is a heat exchange pipe removing portion. 40.
[0067]
That is, in the rear heat exchanger 10B in the indoor heat exchanger 10 described so far, the heat exchange pipe P penetrates the leeward side row Dp from the upper part to the lower part with a predetermined interval. In particular, the present invention removes the heat exchanging pipe only without passing through the upper part.
[0068]
Here, the heat exchanging pipe removing unit 40 is a flat part that does not have any unevenness without any processing on the fins F.
As shown in FIG. 9 and FIG. 10 (A), as the heat exchange pipe removing portion 40A, a plurality of slit-shaped cut and raised pieces 40a, 40b having different lengths provided in a direction orthogonal to the flow direction of the heat exchange air. You may comprise.
[0069]
If it demonstrates, the slit-shaped cut-and-raised piece 40a of both sides is mutually short, and is provided in the position of the upper and lower ends equal. Further, the middle slit-shaped cut-and-raised piece 40a has a total length extending over both sides and substantially half the length of the upper and lower cut-and-raised pieces 40a.
[0070]
Alternatively, as shown in FIG. 10B, as the heat exchange pipe removing portion 40B, a plurality of louver-shaped cut and raised pieces 40c and 40d having different lengths provided in a direction orthogonal to the flow direction of the heat exchange air are used. It may be configured.
[0071]
In other words, the louver-shaped cut-and-raised pieces 40c on both sides are provided so that the overall length is short and the positions of both upper and lower ends are aligned. Further, the middle louver-shaped cut-and-raised piece 40d has a total length extending over almost half the length of the upper and lower cut-and-raised pieces 40c on both sides.
[0072]
In any case, the heat exchange pipe P does not exist in the uppermost part of the leeward side row Dp in the vicinity of the inverted V-shaped bent portion 20 in the rear heat exchanger 10B. Instead, by forming the flat portion 40 or providing the cut-and-raised pieces 40a to 40d, the flow path of drain water flowing down the fin F surface at the uppermost part of the leeward row side Dp is sufficiently secured. Therefore, the risk of drain water scattering from the vicinity of the inverted V-shaped bent portion 20 is reduced.
[0073]
Furthermore, by forming a large number of slit-shaped cut-and-raised pieces 40a and 40b or louver-shaped cut-and-raised pieces 40c and 40d having different lengths adjacent to each other in the direction orthogonal to the flow direction of the heat exchange air, The cut and raised pieces 40a to 40d smoothly flow downward.
[0074]
Therefore, even during drain water retention, unbalanced wind speed distribution around the heat exchanger is prevented, and reliability is improved. Even when a large amount of drain water is retained on the same surface of the fin F, the local increase is avoided to prevent the drain water from being scattered, and the wind speed distribution around the heat exchanger is prevented from being unbalanced.
[0075]
【The invention's effect】
As explained above In the present invention, The fin surface becomes water-repellent depending on the market environment, and even if drain water forms a bridge during cooling operation, the drain width is smooth because the fin width at the trailing edge on the leeward side where drain water flows is wide even if it is held between the fins. It is drained, and there is an effect that the drainage treatment efficiency can be improved without dripping in the middle of the fin.
[0076]
further, In the present invention, When a large amount of drain water is retained on the fin surface of the heat exchanger, the local increase in the vicinity of the inverted V-shaped bent portion is avoided to prevent the drain water from being scattered, and the heat exchanger around the heat exchanger It has effects such as preventing unbalanced wind speed distribution.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view of an air conditioner indoor unit incorporating a heat exchanger, showing an embodiment of the present invention.
FIG. 2 is an enlarged view of a part of the heat exchanger according to the embodiment.
FIG. 3 is an enlarged view of a part of a heat exchanger according to another embodiment.
FIG. 4 is an enlarged view of a part of a heat exchanger according to still another embodiment.
FIG. 5 is an enlarged view of a part of a heat exchanger according to still another embodiment.
FIG. 6 is an enlarged view of a part of a heat exchanger according to still another embodiment.
7A is an enlarged view of an auxiliary protrusion that is a part of the heat exchanger shown in FIG. 1. FIG.
(B) thru | or (D) is a figure explaining the protrusion for auxiliary | assistant which is mutually different.
FIG. 8 is a schematic cross-sectional view of an air conditioner indoor unit incorporating a heat exchanger, showing still another embodiment.
FIG. 9 is a schematic cross-sectional view of an air conditioner indoor unit incorporating a heat exchanger, showing still another embodiment.
FIGS. 10A and 10B are diagrams illustrating different shapes of cut and raised portions.
FIG. 11 is a schematic cross-sectional view of a conventional air conditioner indoor unit incorporating a heat exchanger.
FIG. 12 is an enlarged view of a part of a conventional heat exchanger.
[Explanation of symbols]
10 ... Indoor heat exchanger,
F ... Fins,
P ... heat exchange pipe,
Up: Upwind row,
Dp ... the leeward side row,
14a ... one side cut and raised piece,
30: Reinforcing projection,
40 ... Heat exchange pipe removing section.

Claims

It is a finned tube type in which a large number of vertically long fins are arranged side by side with a gap therebetween, and a plurality of heat exchange pipes are penetrated through these fins at predetermined intervals along the longitudinal direction of the fins. In a heat exchanger arranged obliquely,
The fins, the distance b from the leeward side edge to the heat exchange pipe, than a distance a from the windward side edge to the heat exchange pipe, a wide (b> a) so as characterized by being dimensioned Heat exchanger.

An air conditioner body in which a suction port is provided at the front and upper part and a blowout port is provided at the lower part of the front surface;
In an air conditioner including a heat exchanger accommodated in the air conditioner body and a blower fan having a circular cross section for guiding indoor heat exchange air to the heat exchanger,
The heat exchanger has a large number of vertically long fins arranged in parallel with a gap therebetween, and a plurality of heat exchange pipes are penetrated through the fins at predetermined intervals along the longitudinal direction of the fins. The find tube type
It consists of a front heat exchanger and a rear heat exchanger folded in an inverted V shape in a side view so as to face the front suction port and the upper suction port,
In the fins constituting the front heat exchanger and the rear heat exchanger, the distance b from the leeward edge to the heat exchange pipe is wider than the distance a from the leeward edge to the heat exchange pipe (b> a) An air conditioner that is dimensioned to be

An air conditioner body in which a suction port is provided at the front and upper part and a blowout port is provided at the lower part of the front surface;
In an air conditioner including a heat exchanger accommodated in the air conditioner body and a blower fan having a circular cross section for guiding indoor heat exchange air to the heat exchanger,
The heat exchanger has a large number of vertically long fins arranged side by side with a gap between them, and a plurality of heat exchange pipes along the longitudinal direction of the fins at predetermined intervals, and It is a find tube type penetrating through the windward and leeward rows ,
It consists of a front heat exchanger and a rear heat exchanger folded in an inverted V shape in a side view so as to face the front suction port and the upper suction port,
A bent portion of the front heat exchanger and the rear heat exchanger, and an upper end edge of the fin in the heat exchanger of at least one of the front heat exchanger and the rear heat exchanger, and an uppermost heat exchange pipe of the leeward side row; The air conditioner is characterized in that an auxiliary projection is provided between the two for providing a flow resistance to the heat exchange air and guiding the drain water down.

An air conditioner body in which a suction port is provided at the front and upper part and a blowout port is provided at the lower part of the front surface;
In an air conditioner including a heat exchanger accommodated in the air conditioner body and a blower fan having a circular cross section for guiding indoor heat exchange air to the heat exchanger,
The heat exchanger has a large number of vertically long fins arranged side by side with a gap between them, and a plurality of heat exchange pipes along the longitudinal direction of the fins at predetermined intervals, and It is a find tube type penetrating through the windward and leeward rows,
It consists of a front heat exchanger and a rear heat exchanger folded in an inverted V shape in a side view so as to face the front suction port and the upper suction port,
An air conditioner characterized in that it is a bent portion of the front heat exchanger and the rear heat exchanger, and the leeward side row portion at the top of the rear heat exchanger is a heat exchange pipe removing portion from which the heat exchange pipe is removed. Machine.