JP5009409B2 - Heat exchanger and air conditioner equipped with the same - Google Patents

Heat exchanger and air conditioner equipped with the same Download PDF

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JP5009409B2
JP5009409B2 JP2010239135A JP2010239135A JP5009409B2 JP 5009409 B2 JP5009409 B2 JP 5009409B2 JP 2010239135 A JP2010239135 A JP 2010239135A JP 2010239135 A JP2010239135 A JP 2010239135A JP 5009409 B2 JP5009409 B2 JP 5009409B2
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heat exchanger
flat tube
condensed water
refrigerant
fin
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JP2012093009A (en
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良信 山崎
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Sharp Corp
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Description

本発明はサイドフロー方式のパラレルフロー型熱交換器及びそれを搭載した空気調和機に関する。   The present invention relates to a side flow parallel flow heat exchanger and an air conditioner equipped with the heat exchanger.

複数のヘッダパイプの間に複数の偏平チューブを配置して偏平チューブ内部の複数の冷媒通路をヘッダパイプの内部に連通させるとともに、偏平チューブ間にコルゲートフィン等のフィンを配置したパラレルフロー型の熱交換器は、カーエアコンや建物用空気調和機の室外側ユニットなどに広く利用されている。   A parallel flow type heat in which a plurality of flat tubes are arranged between a plurality of header pipes so that a plurality of refrigerant passages in the flat tubes communicate with the inside of the header pipe, and fins such as corrugated fins are arranged between the flat tubes. Exchangers are widely used in outdoor units of car air conditioners and building air conditioners.

従来のサイドフロー方式パラレルフロー型熱交換器の一例を図７に示す。熱交換器１は、２本のヘッダパイプ２、３と、その間に配置される複数の偏平チューブ４を備える。図７では、ヘッダパイプ２、３は垂直方向に延び、水平方向に間隔を置いて平行に配置されており、偏平チューブ４は水平方向に延び、垂直方向に所定ピッチで配置されている。実際に機器に搭載する段階では、パラレルフロー型熱交換器１は設計の要請に従って様々な角度に据え付けられるものであり、厳密な「垂直」「水平」が当てはまらなくなるケースが多いことは言うまでもない。   An example of a conventional side flow parallel flow type heat exchanger is shown in FIG. The heat exchanger 1 includes two header pipes 2 and 3 and a plurality of flat tubes 4 arranged therebetween. In FIG. 7, the header pipes 2 and 3 extend in the vertical direction and are arranged in parallel in the horizontal direction at intervals, and the flat tubes 4 extend in the horizontal direction and are arranged at a predetermined pitch in the vertical direction. Needless to say, the parallel flow type heat exchanger 1 is installed at various angles in accordance with design requirements at the stage of actually mounting on equipment, and there are many cases where exact “vertical” and “horizontal” do not apply.

偏平チューブ４は金属を押出成型した細長い成型品であり、内部には冷媒を流通させる冷媒通路５が形成されている。偏平チューブ４は長手方向である押出成型方向を水平にする形で配置されるので、冷媒通路５の冷媒流通方向も水平になる。冷媒通路５は断面形状及び断面面積の等しいものが図７の奥行き方向に複数個並び、そのため偏平チューブ４の垂直断面はハーモニカ状を呈している。各冷媒通路５はヘッダパイプ２、３の内部に連通する。隣り合う偏平チューブ４同士の間にはフィン６が配置される。フィン６として、ここではコルゲートフィンを用いているが、プレートフィンでも構わない。   The flat tube 4 is an elongated molded product obtained by extruding a metal, and a refrigerant passage 5 through which a refrigerant flows is formed. Since the flat tube 4 is disposed so that the extrusion direction, which is the longitudinal direction, is horizontal, the refrigerant flow direction of the refrigerant passage 5 is also horizontal. A plurality of refrigerant passages 5 having the same cross-sectional shape and the same cross-sectional area are arranged in the depth direction of FIG. 7, so that the vertical cross section of the flat tube 4 has a harmonica shape. Each refrigerant passage 5 communicates with the inside of the header pipes 2 and 3. Fins 6 are arranged between adjacent flat tubes 4. Here, corrugated fins are used as the fins 6, but plate fins may be used.

ヘッダパイプ２と３、偏平チューブ４、及びフィン６はいずれもアルミニウム等熱伝導の良い金属からなり、偏平チューブ４はヘッダパイプ２、３に対し、フィン６は偏平チューブ４に対し、それぞれロウ付けまたは溶着で固定される。   The header pipes 2 and 3, the flat tubes 4, and the fins 6 are all made of a metal having good heat conductivity such as aluminum, the flat tubes 4 are brazed to the header pipes 2 and 3, and the fins 6 are brazed to the flat tubes 4. Or it is fixed by welding.

熱交換器１では、冷媒出入口７、８はヘッダパイプ３の側にのみ設けられている。ヘッダパイプ３の内部には上下方向に間隔を置いて２枚の仕切板９ａ、９ｃが設けられており、ヘッダパイプ２の内部には仕切板９ａ、９ｃの中間の高さのところに仕切板９ｂが設けられている。   In the heat exchanger 1, the refrigerant inlets and outlets 7 and 8 are provided only on the header pipe 3 side. Two partition plates 9a and 9c are provided in the header pipe 3 at intervals in the vertical direction. Inside the header pipe 2, the partition plates are located at a height intermediate between the partition plates 9a and 9c. 9b is provided.

熱交換器１を蒸発器として使用する場合、冷媒は図７に実線矢印で示すように下側の冷媒出入口７から流入する。冷媒出入口７から入った冷媒は、仕切板９ａでせき止められて偏平チューブ４経由でヘッダパイプ２に向かう。この冷媒の流れが左向きのブロック矢印で表現されている。ヘッダパイプ２に入った冷媒は仕切板９ｂでせき止められて別の偏平チューブ４経由でヘッダパイプ３に向かう。この冷媒の流れが右向きのブロック矢印で表現されている。ヘッダパイプ３に入った冷媒は仕切板９ｃでせき止められてさらに別の偏平チューブ４経由で再びヘッダパイプ２に向かう。この冷媒の流れが左向きのブロック矢印で表現されている。ヘッダパイプ２に入った冷媒は折り返してさらに別の偏平チューブ４経由で再びヘッダパイプ３に向かう。この冷媒の流れが右向きのブロック矢印で表現されている。ヘッダパイプ３に入った冷媒は冷媒出入口８から流出する。このように、冷媒はジグザグの経路を辿って下から上に流れる。ここでは仕切板の数が３の場合を示したが、これは一例であり、仕切板の数と、その結果としてもたらされる冷媒流れの折り返し回数は、必要に応じ任意の数を設定することができる。   When the heat exchanger 1 is used as an evaporator, the refrigerant flows from the lower refrigerant inlet / outlet 7 as indicated by solid line arrows in FIG. The refrigerant entering from the refrigerant inlet / outlet 7 is blocked by the partition plate 9 a and travels toward the header pipe 2 via the flat tube 4. This refrigerant flow is represented by a left-pointing block arrow. The refrigerant that has entered the header pipe 2 is blocked by the partition plate 9 b and travels to the header pipe 3 via another flat tube 4. This refrigerant flow is represented by a right-pointing block arrow. The refrigerant that has entered the header pipe 3 is dammed up by the partition plate 9 c, and further travels toward the header pipe 2 via another flat tube 4. This refrigerant flow is represented by a left-pointing block arrow. The refrigerant that has entered the header pipe 2 is folded back and travels again to the header pipe 3 via another flat tube 4. This refrigerant flow is represented by a right-pointing block arrow. The refrigerant that has entered the header pipe 3 flows out from the refrigerant inlet / outlet 8. In this way, the refrigerant follows the zigzag path and flows from the bottom to the top. Although the case where the number of partition plates is 3 is shown here, this is only an example, and the number of partition plates and the number of times the resulting refrigerant flow may be folded may be set as desired. it can.

熱交換器１を凝縮器として使用する場合は、冷媒の流れが逆になる。すなわち冷媒は図７に点線矢印で示すように冷媒出入口８からヘッダパイプ３に入り、仕切板９ｃでせき止められて偏平チューブ４経由でヘッダパイプ２に向かい、ヘッダパイプ２では仕切板９ｂでせき止められて別の偏平チューブ４経由でヘッダパイプ３に向かい、ヘッダパイプ３では仕切板９ａでせき止められてさらに別の偏平チューブ４経由で再びヘッダパイプ２に向かい、ヘッダパイプ２で折り返してさらに別の偏平チューブ４経由で再びヘッダパイプ３に向かい、冷媒出入口７から点線矢印のように流出するという、ジグザグの経路を辿って上から下に流れる。   When the heat exchanger 1 is used as a condenser, the refrigerant flow is reversed. That is, the refrigerant enters the header pipe 3 from the refrigerant inlet / outlet 8 as shown by the dotted arrow in FIG. 7, is dammed by the partition plate 9c and goes to the header pipe 2 via the flat tube 4, and is dammed by the partition plate 9b in the header pipe 2. It heads to the header pipe 3 via another flat tube 4, and the header pipe 3 is dammed by a partition plate 9 a, then goes to the header pipe 2 again via another flat tube 4, and is folded back by the header pipe 2 to make another flat It flows from the top to the bottom following the zigzag path in which it goes to the header pipe 3 again via the tube 4 and flows out from the refrigerant inlet / outlet 7 as indicated by the dotted line arrow.

熱交換器を蒸発器として用いた場合、低温となった熱交換器表面に大気中の水分が凝結して凝縮水が発生する。パラレルフロー型熱交換器では、偏平チューブやフィンの表面に凝縮水が留まると空気流通路の断面積が水によって狭められてしまい、熱交換性能が低下する。   When the heat exchanger is used as an evaporator, moisture in the atmosphere condenses on the surface of the heat exchanger that has become a low temperature, and condensed water is generated. In the parallel flow type heat exchanger, when the condensed water stays on the surface of the flat tube or the fin, the cross-sectional area of the air flow passage is narrowed by the water, and the heat exchange performance is deteriorated.

凝縮水は、気温が低いと熱交換器の表面で霜と化す。霜が氷にまで進むこともある。本明細書では、そのような霜や氷が溶けた水、いわゆる除霜水も含めた意味で「凝縮水」の語を用いるものとする。   When the temperature is low, the condensed water turns into frost on the surface of the heat exchanger. Frost can travel to ice. In the present specification, the term “condensed water” is used to include water in which such frost and ice are melted, so-called defrosted water.

サイドフロー方式のパラレルフロー型熱交換器において凝縮水が発生し滞留すると、次のような問題が生じる。サイドフロー方式のパラレルフロー型熱交換器１を、図８に示す通り、凝縮水が結集する側の面が下を向くように傾けて置くと、フィン６の端にたまった凝縮水が、下の段のフィン６に乗り移る前にフィン６の角から滴下してしまう。熱交換器１が空気調和機の室内機に搭載され、熱交換器１の下にクロスフローファンが設置されている場合など、クロスフローファンが吹き出す気流に混じって水滴が飛び散る水とびが発生し、使用者に不快感を与える。   When condensed water is generated and accumulated in the side flow parallel flow heat exchanger, the following problems occur. As shown in FIG. 8, when the side flow parallel flow heat exchanger 1 is tilted so that the surface on which the condensed water is concentrated faces downward, the condensed water accumulated at the end of the fin 6 It drops from the corner of the fin 6 before it changes over to the fin 6 of the step. When the heat exchanger 1 is installed in an indoor unit of an air conditioner and a cross flow fan is installed under the heat exchanger 1, a water jump occurs in which water droplets are scattered by the air flow blown out by the cross flow fan. , Discomfort to the user.

そこで、水とびが発生する前に凝縮水を排水する方策が種々提案されている。その例を特許文献１、２に見ることができる。   Accordingly, various measures for draining condensed water before water jumps have been proposed. Examples thereof can be seen in Patent Documents 1 and 2.

特許文献１記載の熱交換器では、凝縮水の結集側にフィンと接触する排水ガイドを配置している。排水ガイドは線形部材からなり、偏平管に対して傾斜配置され、両端の少なくとも一つが熱交換器の下端側あるいは側端側に導かれている。   In the heat exchanger described in Patent Document 1, a drainage guide that comes into contact with the fins is disposed on the condensed water condensing side. The drainage guide is made of a linear member, is inclined with respect to the flat tube, and at least one of both ends is led to the lower end side or the side end side of the heat exchanger.

特許文献２記載の熱交換器では、ガイド板が、送風の下流側に、フィンに接触して配置されている。熱交換器の表面に付着した露は、送風によって下流側に移動してガイド板に付着し、その重さによって自由落下する。   In the heat exchanger described in Patent Document 2, the guide plate is disposed in contact with the fins on the downstream side of the air blowing. The dew adhering to the surface of the heat exchanger moves downstream by blowing and adheres to the guide plate, and falls freely by its weight.

特開２００７−２８５６７３号公報JP 2007-285673 A 特開２００１−２６３８６１号公報Japanese Patent Laid-Open No. 2001-263861

特許文献１記載の熱交換器では、線形部材からなる排水ガイドを熱交換器に接触させて水を導く。しかしながら、熱交換器が傾いた状態で設置されているときや、排水ガイドに汚れが付着したときなど、水が排水ガイドを伝わらないで、水とび等の現象が発生することがある。特許文献２記載の熱交換器でも、傾いた状態で設置された場合には、フィン間でブリッジした水がもとになって水とびが発生する。   In the heat exchanger described in Patent Document 1, water is guided by bringing a drainage guide made of a linear member into contact with the heat exchanger. However, when the heat exchanger is installed in a tilted state or when dirt is attached to the drainage guide, a phenomenon such as water jumping may occur without water passing through the drainage guide. Even in the heat exchanger described in Patent Document 2, when installed in an inclined state, water jumps due to water bridged between the fins.

本発明は上記の点に鑑みなされたものであり、凝縮水が結集する側の面が下を向くように熱交換器が傾いた状態で置かれたとしても水とびが発生しないようにすることを目的とする。   The present invention has been made in view of the above points, and prevents the occurrence of water jumping even when the heat exchanger is placed in an inclined state so that the surface on which condensed water is collected faces downward. With the goal.

本発明の好ましい実施形態によれば、間隔を置いて平行に配置された複数のヘッダパイプと、前記複数のヘッダパイプの間に複数配置され、内部に設けた冷媒通路を前記ヘッダパイプの内部に連通させた偏平チューブと、前記偏平チューブ同士の間に配置されたフィンとを備えたサイドフロー方式のパラレルフロー型熱交換器において、凝縮水が結集する側の面における前記偏平チューブの端に、前記フィンの下端を外側から覆う塞き止め壁が形成されている。   According to a preferred embodiment of the present invention, a plurality of header pipes arranged in parallel at intervals, and a plurality of refrigerant pipes arranged between the plurality of header pipes are provided inside the header pipes. In the parallel flow type heat exchanger of the side flow method provided with the flat tubes communicated and the fins disposed between the flat tubes, at the end of the flat tubes on the surface where condensed water is concentrated, A blocking wall that covers the lower end of the fin from the outside is formed.

また、上記構成の熱交換器において、前記塞き止め壁が前記偏平チューブと一体成型され、前記冷媒通路は、前記偏平チューブ部分に設けられるのみで、前記塞き止め壁には設けられないことが好ましい。   Further, in the heat exchanger having the above-described configuration, the blocking wall is formed integrally with the flat tube, and the refrigerant passage is provided only in the flat tube portion, and is not provided in the blocking wall. Is preferred.

本発明の好ましい実施形態によれば、空気調和機の室内機または室外機に上記構成の熱交換器が搭載される。   According to a preferred embodiment of the present invention, the heat exchanger configured as described above is mounted on an indoor unit or an outdoor unit of an air conditioner.

本発明によると、サイドフロー方式のパラレルフロー型熱交換器において、凝縮水が結集する側の面における偏平チューブの端に、フィンの下端を外側から覆う塞き止め壁が形成されているから、結集した凝縮水は塞き止め壁によってフィンの内部に導かれ、滴下しない。これにより、凝縮水がファンの上に落下して水とびが発生するという事態を避けることができる。   According to the present invention, in the parallel flow type heat exchanger of the side flow type, a blocking wall that covers the lower end of the fin from the outside is formed at the end of the flat tube on the surface on the side where the condensed water is concentrated. The condensed water gathered is guided to the inside of the fin by the blocking wall and does not drip. As a result, it is possible to avoid a situation in which condensed water falls on the fan and a water jump occurs.

本発明の第１実施形態に係る熱交換器の概略断面図である。It is a schematic sectional drawing of the heat exchanger which concerns on 1st Embodiment of this invention. 図１の熱交換器の部分拡大図である。It is the elements on larger scale of the heat exchanger of FIG. 本発明の第２実施形態に係る熱交換器の概略断面図である。It is a schematic sectional drawing of the heat exchanger which concerns on 2nd Embodiment of this invention. 本発明に係る熱交換器を搭載した空気調和機の概略構成図で、暖房運転時の状態を示すものである。It is a schematic block diagram of the air conditioner carrying the heat exchanger which concerns on this invention, and shows the state at the time of heating operation. 本発明に係る熱交換器を搭載した空気調和機の概略構成図で、冷房運転時の状態を示すものである。It is a schematic block diagram of the air conditioner carrying the heat exchanger which concerns on this invention, and shows the state at the time of air_conditionaing | cooling operation. 本発明に係る熱交換器を搭載した空気調和機の室外機の概略断面図である。It is a schematic sectional drawing of the outdoor unit of the air conditioner carrying the heat exchanger which concerns on this invention. 従来のサイドフロー方式パラレルフロー型熱交換器の概略構造を示す垂直断面図である。It is a vertical sectional view showing a schematic structure of a conventional side flow type parallel flow type heat exchanger. 従来のサイドフロー方式パラレルフロー型熱交換器を、凝縮水が結集する側の面が下を向くように傾けて置いた状態を示す概略断面図である。It is a schematic sectional drawing which shows the state which inclined and placed the conventional side flow type parallel flow type heat exchanger so that the surface on the side where condensed water collects may face down.

以下本発明の第１実施形態を、図１及び図２を参照しつつ説明する。図７の従来構造と機能的に共通する構成要素には図７で用いたのと同じ符号を付し、説明は省略する。   Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. Components that are functionally common to the conventional structure of FIG. 7 are given the same reference numerals as used in FIG. 7, and descriptions thereof are omitted.

サイドフロー方式のパラレルフロー型熱交換器１に、次のような構造上の変更を施す。すなわち、凝縮水が結集する側の面における偏平チューブ４の端に塞き止め部１０を形成する。塞き止め部１０は、偏平チューブ４の延長部となるベース部１１と、ベース部１１の端から立ち上がる塞き止め壁１２を有し、全体として断面Ｌ字形になっている。塞き止め壁１２はフィン６の下端を外側から覆う。塞き止め部１０は、偏平チューブ４とは別に成型しておいてそれをロウ付けまたは溶接で偏平チューブ４に接合してもよく、偏平チューブ４に一体成型してもよい。偏平チューブ４とは別に成型する場合、塞き止め部１０の材料は偏平チューブ４と同じであってよいが、そうなると塞き止め部１０自体が冷却されて結露し、塞き止め部１０の角から凝縮水が滴下する可能性が出てくる。それを防ぐため、塞き止め部１０を合成樹脂のような冷えにくい材料で成型することとしてもよい。   The following structural changes are made to the side flow parallel flow heat exchanger 1. That is, the blocking portion 10 is formed at the end of the flat tube 4 on the surface on the side where condensed water is collected. The blocking portion 10 includes a base portion 11 that is an extension of the flat tube 4 and a blocking wall 12 that rises from the end of the base portion 11 and has an L-shaped cross section as a whole. The blocking wall 12 covers the lower end of the fin 6 from the outside. The blocking portion 10 may be molded separately from the flat tube 4 and may be joined to the flat tube 4 by brazing or welding, or may be integrally formed with the flat tube 4. In the case of molding separately from the flat tube 4, the material of the blocking portion 10 may be the same as that of the flat tube 4, but in that case, the blocking portion 10 itself is cooled and condensed, and the corner of the blocking portion 10 is formed. There is a possibility that condensed water will drip from the water. In order to prevent this, the blocking portion 10 may be molded from a material that is difficult to cool, such as a synthetic resin.

塞き止め部１０には、排水を促すための排水孔（図示せず）が設けられている。この排水孔は、下の段のフィン６に乗り移る位置に設けられている。なお、塞き止め部１０を偏平チューブ４と一体成型する場合、塞き止め部１０には冷媒通路５は設けないようにする。このようにすることにより、塞き止め部１０自身に結露して、その角から凝縮水が滴下するといった事態を避けることができる。   The blocking portion 10 is provided with a drain hole (not shown) for promoting drainage. The drainage hole is provided at a position where the drainage hole is transferred to the lower fin 6. When the blocking portion 10 is integrally formed with the flat tube 4, the blocking passage 10 is not provided with the refrigerant passage 5. By doing in this way, it is possible to avoid a situation in which condensation occurs on the blocking portion 10 itself and condensed water drops from the corner.

このように、凝縮水が結集する側の面における偏平チューブ４の端に、フィン６の下端を外側から覆う塞き止め壁１２が形成されているから、結集した凝縮水は塞き止め壁１２によってフィン６の内部に導かれ、滴下しない。これにより、凝縮水がファンの上に落下して水とびが発生するという事態を避けることができる。   Thus, since the blocking wall 12 which covers the lower end of the fin 6 from the outside is formed at the end of the flat tube 4 on the surface where condensed water is collected, the condensed water collected is blocked. Is guided into the inside of the fin 6 and does not drip. As a result, it is possible to avoid a situation in which condensed water falls on the fan and a water jump occurs.

図４及び図５には、セパレート型空気調和機の室内機に熱交換器１を搭載した例を示す。図４及び図５に示されるセパレート型空気調和機の室外機は圧縮機、四方弁、膨張弁、室外側熱交換器、室外側送風機などを含み、室内機は室内側熱交換器、室内側送風機などを含む。室外側熱交換器は、暖房運転時には蒸発器として機能し、冷房運転時には凝縮器として機能する。室内側熱交換器は、暖房運転時には凝縮器として機能し、冷房運転時には蒸発器として機能する。   4 and 5 show an example in which the heat exchanger 1 is mounted on an indoor unit of a separate type air conditioner. The outdoor unit of the separate type air conditioner shown in FIGS. 4 and 5 includes a compressor, a four-way valve, an expansion valve, an outdoor heat exchanger, an outdoor fan, etc., and the indoor unit is an indoor heat exchanger, an indoor side Includes a blower. The outdoor heat exchanger functions as an evaporator during heating operation and functions as a condenser during cooling operation. The indoor heat exchanger functions as a condenser during heating operation and functions as an evaporator during cooling operation.

図４には冷凍サイクルとしてヒートポンプサイクルを用いるセパレート型空気調和機の基本的構成が示されている。ヒートポンプサイクル１０１は、圧縮機１０２、四方弁１０３、室外側の熱交換器１０４、減圧膨張装置１０５、及び室内側の熱交換器１０６をループ状に接続したものである。圧縮機１０２、四方弁１０３、熱交換器１０４、及び減圧膨張装置１０５は室外機１１０の筐体に収容され、熱交換器１０６は室内機１２０の筐体に収容される。熱交換器１０４には室外側の送風機１０７が組み合わせられ、熱交換器１０６には室内側の送風機１０８が組み合わせられる。送風機１０７は吹出気流形成用のプロペラファン１０７ａを含み、送風機１０８は吹出気流形成用のクロスフローファン１０８ａを含む。クロスフローファン１０８ａは熱交換器１０６の下に軸線を水平にして配置される。   FIG. 4 shows a basic configuration of a separate air conditioner that uses a heat pump cycle as a refrigeration cycle. The heat pump cycle 101 includes a compressor 102, a four-way valve 103, an outdoor heat exchanger 104, a decompression / expansion device 105, and an indoor heat exchanger 106 connected in a loop. The compressor 102, the four-way valve 103, the heat exchanger 104, and the decompression / expansion device 105 are accommodated in the casing of the outdoor unit 110, and the heat exchanger 106 is accommodated in the casing of the indoor unit 120. An outdoor fan 107 is combined with the heat exchanger 104, and an indoor fan 108 is combined with the heat exchanger 106. The blower 107 includes a propeller fan 107a for forming a blown airflow, and the blower 108 includes a cross flow fan 108a for forming a blown airflow. The cross flow fan 108a is disposed below the heat exchanger 106 with its axis line horizontal.

本発明に係る熱交換器１は、室内機の熱交換器１０６の構成要素として用いることができる。熱交換器１０６は、３個の熱交換器１０６Ａ、１０６Ｂ、１０６Ｃを送風機１０８を覆う屋根のように組み合わせたものであり、熱交換器１０６Ａ、１０６Ｂ、１０６Ｃのいずれかまたは全てを熱交換器１とすることができる。   The heat exchanger 1 which concerns on this invention can be used as a component of the heat exchanger 106 of an indoor unit. The heat exchanger 106 is a combination of three heat exchangers 106A, 106B, and 106C like a roof that covers the blower 108, and any or all of the heat exchangers 106A, 106B, and 106C are combined with the heat exchanger 1. It can be.

図４は暖房運転時の状態を示す。この時は、圧縮機１０２から吐出された高温高圧の冷媒は室内側の熱交換器１０６に入ってそこで放熱し、凝縮する。熱交換器１０６を出た冷媒は減圧膨張装置１０５から室外側の熱交換器１０４に入ってそこで膨張し、室外空気から熱を取り込んだ後、圧縮機１０２に戻る。室内側の送風機１０８によって生成された気流が熱交換器１０６からの放熱を促進し、室外側の送風機１０７によって生成された気流が熱交換器１０４の吸熱を促進する。   FIG. 4 shows a state during heating operation. At this time, the high-temperature and high-pressure refrigerant discharged from the compressor 102 enters the indoor heat exchanger 106 where it dissipates heat and condenses. The refrigerant exiting the heat exchanger 106 enters the outdoor heat exchanger 104 from the decompression / expansion device 105 and expands there, takes heat from the outdoor air, and returns to the compressor 102. The airflow generated by the indoor fan 108 promotes heat dissipation from the heat exchanger 106, and the airflow generated by the outdoor fan 107 accelerates heat absorption of the heat exchanger 104.

図５は冷房運転時あるいは除霜運転時の状態を示す。この時は四方弁１０３が切り換えられて暖房運転時と冷媒の流れが逆になる。すなわち、圧縮機１０２から吐出された高温高圧の冷媒は室外側の熱交換器１０４に入ってそこで放熱し、凝縮する。熱交換器１０４を出た冷媒は減圧膨張装置１０５から室内側の熱交換器１０６に入ってそこで膨張し、室内空気から熱を取り込んだ後、圧縮機１０２に戻る。室外側の送風機１０７によって生成された気流が熱交換器１０４からの放熱を促進し、室内側の送風機１０８によって生成された気流が熱交換器１０６の吸熱を促進する。   FIG. 5 shows a state during cooling operation or defrosting operation. At this time, the four-way valve 103 is switched so that the refrigerant flow is reversed from that during the heating operation. That is, the high-temperature and high-pressure refrigerant discharged from the compressor 102 enters the outdoor heat exchanger 104, where it dissipates heat and condenses. The refrigerant exiting the heat exchanger 104 enters the heat exchanger 106 on the indoor side from the decompression / expansion device 105 and expands there, takes heat from the indoor air, and returns to the compressor 102. The air flow generated by the outdoor air blower 107 promotes heat dissipation from the heat exchanger 104, and the air flow generated by the indoor air blower 108 promotes heat absorption of the heat exchanger 106.

本発明に係る熱交換器１を室内機の熱交換器１０６の構成要素として用いた場合、熱交換器１の風下側であり、熱交換器１の姿勢によっては下面側でもある面が凝縮水の結集側となる。本発明に係る熱交換器１を用いれば、風下側の面に凝縮水が結集しても、それがクロスフローファン１０８ａに滴下したりするようなことはなく、水とびが発生しない。また、熱交換器１ではブリッジ現象を抑制することができ、通風抵抗の増加を抑えることが可能となる。   When the heat exchanger 1 according to the present invention is used as a constituent element of the heat exchanger 106 of the indoor unit, the surface that is the leeward side of the heat exchanger 1 and also the lower surface side depending on the posture of the heat exchanger 1 is condensed water. The rally side. When the heat exchanger 1 according to the present invention is used, even if condensed water collects on the surface on the leeward side, it does not drop on the cross flow fan 108a, and water splash does not occur. Moreover, in the heat exchanger 1, a bridge phenomenon can be suppressed and an increase in ventilation resistance can be suppressed.

図３に本発明の第２実施形態を示す。第２実施形態の熱交換器１は、第１実施形態の熱交換器１に次のような改変を加えたものである。すなわち、第２実施形態の熱交換器１は、ヘッダパイプ２、３の高さが同一でなく、ヘッダパイプ２がヘッダパイプ３より下がっている。偏平チューブ４及びフィン６と、図３では図示されないが塞き止め部１０も、ヘッダパイプ２の側が低くなるように傾斜している。   FIG. 3 shows a second embodiment of the present invention. The heat exchanger 1 of the second embodiment is obtained by adding the following modifications to the heat exchanger 1 of the first embodiment. That is, in the heat exchanger 1 of the second embodiment, the header pipes 2 and 3 are not the same height, and the header pipe 2 is lower than the header pipe 3. The flat tube 4 and the fin 6 and the blocking portion 10 (not shown in FIG. 3) are also inclined so that the header pipe 2 side is lowered.

第２実施形態の熱交換器１は、偏平チューブ４と塞き止め部１０が、ヘッダパイプ２の側が低くなるように傾斜しているから、凝縮水は偏平チューブ４と塞き止め部１０を伝ってヘッダパイプ２の方に流れ、それからヘッダパイプ２を伝って流下するので、さらに良好な排水効果が得られる。このため、水とびが発生しにくい。   In the heat exchanger 1 of the second embodiment, since the flat tube 4 and the blocking portion 10 are inclined so that the header pipe 2 side is lowered, the condensed water causes the flat tube 4 and the blocking portion 10 to be lowered. Since it flows along the header pipe 2 and then flows down along the header pipe 2, an even better drainage effect can be obtained. For this reason, it is difficult for water jumps to occur.

第１実施形態の熱交換器１も第２実施形態の熱交換器１も、セパレート型空気調和機の室内機のみならず、室外機にも搭載することができる。図６に室外機への搭載例を示す。   Both the heat exchanger 1 of the first embodiment and the heat exchanger 1 of the second embodiment can be mounted not only on an indoor unit of a separate air conditioner but also on an outdoor unit. FIG. 6 shows an example of mounting on an outdoor unit.

図６の室外機２０は平面形状略矩形の板金製筐体２０ａを備え、筐体２０ａの長辺側を正面２０Ｆ及び背面２０Ｂとし、短辺側を左側面２０Ｌ及び右側面２０Ｒとしている。正面２０Ｆには排気口２１が形成され、背面２０Ｂには背面吸気口２２が形成され、左側面２０Ｌには側面吸気口２３が形成される。排気口２１は複数の水平なスリット状開口の集合からなり、背面吸気口２２と側面吸気口２３は格子状の開口からなる。正面２０Ｆ、背面２０Ｂ、左側面２０Ｌ、右側面２０Ｒの４面の板金部材に図示しない天板と底板が加わって六面体形状の筐体２０ａが形成される。   The outdoor unit 20 shown in FIG. 6 includes a sheet metal housing 20a having a substantially rectangular planar shape. The long side of the housing 20a is a front surface 20F and a back surface 20B, and the short side is a left side surface 20L and a right side surface 20R. An exhaust port 21 is formed on the front surface 20F, a rear intake port 22 is formed on the rear surface 20B, and a side intake port 23 is formed on the left side surface 20L. The exhaust port 21 is made up of a set of a plurality of horizontal slit-like openings, and the rear intake port 22 and the side intake ports 23 are made up of lattice-like openings. A top plate and a bottom plate (not shown) are added to the four sheet metal members of the front surface 20F, the back surface 20B, the left side surface 20L, and the right side surface 20R to form a hexahedral-shaped housing 20a.

筐体２０ａの内部には、背面吸気口２２及び側面吸気口２３のすぐ内側に平面形状Ｌ字形とされた熱交換器１（第１実施形態または第２実施形態のもの）が配置される。熱交換器１は、図１で右側となった面、すなわち上段の偏平チューブ４が下段の偏平チューブ４に対しオーバーハングとなっている面が、風下側となるように配置される。   Inside the housing 20a, the heat exchanger 1 (in the first embodiment or the second embodiment) having an L-shape in a planar shape is disposed immediately inside the rear intake port 22 and the side intake port 23. The heat exchanger 1 is arranged so that the surface on the right side in FIG. 1, that is, the surface where the upper flat tube 4 is overhanging the lower flat tube 4 is on the leeward side.

熱交換器１と室外空気との間で強制的に熱交換を行わせるため、熱交換器１と排気口２１の間に送風機２４が配置される。送風機２４は電動機２４ａにプロペラファン２４ｂを組み合わせたものである。送風効率向上のため、筐体２０ａの正面２０Ｆの内面にはプロペラファン２４ｂを囲むベルマウス２５が取り付けられる。筐体２０ａの右側面２０Ｒの内側の空間は背面吸気口２２から排気口２１へと流れる空気流から隔壁２６で隔離されており、ここに圧縮機２７が収容されている。   In order to force heat exchange between the heat exchanger 1 and the outdoor air, a blower 24 is disposed between the heat exchanger 1 and the exhaust port 21. The blower 24 is a combination of an electric motor 24a and a propeller fan 24b. In order to improve the blowing efficiency, a bell mouth 25 surrounding the propeller fan 24b is attached to the inner surface of the front surface 20F of the housing 20a. A space inside the right side surface 20R of the housing 20a is isolated by a partition wall 26 from an air flow flowing from the rear intake port 22 to the exhaust port 21, and a compressor 27 is accommodated therein.

室外機２０に搭載された第１実施形態の熱交換器１は、塞き止め壁１２の存在によって水とびが防止される上、オーバーハングとなっている面を傾けると排水も促進され、水とび低減に寄与する。   The heat exchanger 1 according to the first embodiment mounted on the outdoor unit 20 prevents water jumping due to the presence of the blocking wall 12 and also promotes drainage by tilting the overhanging surface. Contributes to skip reduction.

室外機２０に搭載された第２実施形態の熱交換器１は、塞き止め壁１２の存在によって水とびが防止される上、偏平チューブ４と塞き止め部１０が一方のヘッダパイプの側が低くなるように傾斜していて良好な排水効果が得られることも、水とび低減に寄与する。   In the heat exchanger 1 of the second embodiment mounted on the outdoor unit 20, water leakage is prevented by the presence of the blocking wall 12, and the flat tube 4 and the blocking portion 10 are arranged on one header pipe side. The fact that it is inclined so as to be low and a good drainage effect is obtained also contributes to the reduction of water jump.

以上、本発明の実施形態につき説明したが、本発明の範囲はこれに限定されるものではなく、発明の主旨を逸脱しない範囲で種々の変更を加えて実施することができる。   Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

本発明はサイドフロー方式のパラレルフロー型熱交換器に広く利用可能である。   The present invention is widely applicable to side flow parallel flow heat exchangers.

１ 熱交換器
２、３ ヘッダパイプ
４ 偏平チューブ
５ 冷媒通路
６ フィン
７、８ 冷媒出入口
１０ 塞き止め部
１１ ベース部
１２ 塞き止め壁
２０ 室外機
１１０ 室外機
１２０ 室内機 DESCRIPTION OF SYMBOLS 1 Heat exchanger 2, 3 Header pipe 4 Flat tube 5 Refrigerant passage 6 Fin 7, 8 Refrigerant inlet / outlet 10 Blocking part 11 Base part 12 Blocking wall 20 Outdoor unit 110 Outdoor unit 120 Indoor unit

Claims (3)

間隔を置いて平行に配置された複数のヘッダパイプと、前記複数のヘッダパイプの間に複数配置され、内部に設けた冷媒通路を前記ヘッダパイプの内部に連通させた偏平チューブと、前記偏平チューブ同士の間に配置されたフィンとを備えたサイドフロー方式のパラレルフロー型熱交換器において、
凝縮水が結集する側の面における前記偏平チューブの端に、前記フィンの下端を外側から覆う塞き止め壁が形成され、
凝縮水が結集する側の面が下を向くように熱交換器本体を傾けたときに、前記偏平チューブと前記塞き止め壁との境界部分の一部が前記フィンの下端よりも上方に位置することを特徴とする熱交換器。 A plurality of header pipes arranged in parallel at intervals, a plurality of flat tubes arranged between the plurality of header pipes and having refrigerant passages provided therein communicated with the inside of the header pipes, and the flat tubes In the parallel flow type heat exchanger of the side flow type provided with fins arranged between each other,
A blocking wall that covers the lower end of the fin from the outside is formed at the end of the flat tube on the surface on the side where condensed water collects ,
When the heat exchanger body is tilted so that the surface on which the condensed water is collected faces downward, a part of the boundary portion between the flat tube and the blocking wall is positioned above the lower end of the fin. The heat exchanger characterized by doing. 前記塞き止め壁は、凝縮水が結集する側の面において、前記フィンの外側に接触することを特徴とする請求項１に記載の熱交換器。 2. The heat exchanger according to claim 1, wherein the blocking wall is in contact with the outside of the fin on a surface where condensed water is collected . 請求項１または２に記載の熱交換器を室内機または室外機に搭載したことを特徴とする空気調和機。   An air conditioner comprising the heat exchanger according to claim 1 or 2 mounted in an indoor unit or an outdoor unit.
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