JP5128522B2 - Heat exchanger, air conditioner - Google Patents

Heat exchanger, air conditioner Download PDF

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JP5128522B2
JP5128522B2 JP2009051904A JP2009051904A JP5128522B2 JP 5128522 B2 JP5128522 B2 JP 5128522B2 JP 2009051904 A JP2009051904 A JP 2009051904A JP 2009051904 A JP2009051904 A JP 2009051904A JP 5128522 B2 JP5128522 B2 JP 5128522B2
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heat exchanger
heat transfer
peripheral surface
tube
outer peripheral
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JP2010203726A (en
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知史 清水
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Toshiba Carrier Corp
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Description

本発明は熱交換器及びこれを用いた空気調和機に係り、特に形状を改良した熱交換器及びこれを用いた空気調和機に関する。   The present invention relates to a heat exchanger and an air conditioner using the heat exchanger, and more particularly to a heat exchanger having an improved shape and an air conditioner using the heat exchanger.

従来、熱交換効率を向上させる目的で、空気抵抗を低減させる楕円管あるいは扁平管を用いる非円形管熱交換器が多く提案されている。   Conventionally, for the purpose of improving heat exchange efficiency, many non-circular tube heat exchangers using an elliptic tube or a flat tube that reduce air resistance have been proposed.

そして、従来の非円形管熱交換器には、複数の伝熱管をヘッダーに溶着する構造のものが用いられている（例えば、特許文献１、特許文献２参照）。   And the thing of the structure which welds a some heat exchanger tube to a header is used for the conventional non-circular tube heat exchanger (for example, refer patent document 1, patent document 2).

特開２００２−２３５９９４号公報JP 2002-235994 A 特開２００３−１４８８８９号公報JP 2003-148889 A

しかし、特許文献１及び特許文献２に記載の熱交換器では、ヘッダー構造が複雑になり、ヘッダーと伝熱管の溶着に、大掛かりなロー付け設備を必要とする。また、このようなヘッダー方式は、分流が難しく、空気調和機用の木目細かい分流には対応できない問題がある。   However, in the heat exchangers described in Patent Document 1 and Patent Document 2, the header structure is complicated, and a large brazing facility is required for welding the header and the heat transfer tube. In addition, such a header method is difficult to divert, and has a problem that it cannot cope with fine diversion for an air conditioner.

本発明は、上述した事情を考慮してなされたものであり、楕円形状または扁平円形状の伝熱管を用いるとともに、リターンベンドは内周面を伝熱管の外周面の形状と同一形状に形成し、外周面を円形に形成することで、空気側圧力損失が小さくかつ、管内熱伝達率が高く、加工性、製造性がよい熱交換器を提供することを目的とする。   The present invention has been made in consideration of the above-described circumstances, and uses an elliptical or flat circular heat transfer tube, and the return bend has an inner peripheral surface formed in the same shape as the outer peripheral surface of the heat transfer tube. An object of the present invention is to provide a heat exchanger that has a small air-side pressure loss, a high heat transfer coefficient in the tube, and good workability and manufacturability by forming the outer peripheral surface in a circular shape.

また、空気側圧力損失が小さくかつ、管内熱伝達率が高く、加工性、製造性がよい熱交換器を用いた空気調和機を提供することを目的とする。   It is another object of the present invention to provide an air conditioner using a heat exchanger that has a small air-side pressure loss, a high in-tube heat transfer rate, and good workability and manufacturability.

上述した目的を達成するため、本発明に係る熱交換器は、互いに所定間隔を存して並設され、互いの隙間に熱交換空気を流通させる複数枚のフィンと、このフィンを貫通しかつ、フィンの長手方向に沿って配列され、内部に熱交換媒体を導通させる流路を形成する伝熱管と、この伝熱管の端部同士を接続するＵ字状のリターンベンドとを具備した熱交換器において、前記伝熱管は、外周面が楕円形状または扁平円形状を有し、前記リターンベンドは、内周面が前記伝熱管の外周面の形状と同一形状に形成されかつ、外周面が円形に形成されていることを特徴とする。   In order to achieve the above-described object, a heat exchanger according to the present invention is arranged in parallel with a predetermined interval between each other, a plurality of fins that circulate heat exchange air in the gaps between each other, and through these fins. , Heat exchange comprising a heat transfer tube arranged along the longitudinal direction of the fins and forming a flow path through which the heat exchange medium is conducted, and a U-shaped return bend connecting ends of the heat transfer tubes The heat transfer tube has an elliptical or flat circular outer peripheral surface, and the return bend has an inner peripheral surface formed in the same shape as the outer peripheral surface of the heat transfer tube, and the outer peripheral surface is circular. It is characterized by being formed.

また、本発明の他の態様によれば、本発明に係る空気調和機は、圧縮機、四方切換弁、室外熱交換器、膨張装置、室内熱交換器を冷媒配管で連結した冷凍サイクルを備えた空気調和機において、前記室外熱交換器および前記室内熱交換器の少なくともいずれか一方は、互いに所定間隔を存して並設され、互いの隙間に熱交換空気を流通させる複数枚のフィンと、このフィンを貫通しかつ、フィンの長手方向に沿って配列され、内部に熱交換媒体を導通させる流路を形成する伝熱管と、この伝熱管の端部同士を接続するＵ字状のリターンベンドとを具備し、前記伝熱管の外周面が楕円形状または扁平円形状を有し、前記リターンベンドは内周面が前記伝熱管の外周面の形状と同一形状に形成されかつ、外周面が円形に形成されていることを特徴とする。   According to another aspect of the present invention, an air conditioner according to the present invention includes a refrigeration cycle in which a compressor, a four-way switching valve, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger are connected by a refrigerant pipe. In the above air conditioner, at least one of the outdoor heat exchanger and the indoor heat exchanger is arranged in parallel with a predetermined interval between each other, and a plurality of fins that circulate the heat exchange air in the gap between each other; A heat transfer pipe which penetrates the fin and is arranged along the longitudinal direction of the fin and forms a flow path through which the heat exchange medium is conducted, and a U-shaped return which connects the ends of the heat transfer pipe A bend, the outer peripheral surface of the heat transfer tube has an elliptical shape or a flat circular shape, the return bend has an inner peripheral surface formed in the same shape as the outer peripheral surface of the heat transfer tube, and the outer peripheral surface is It is formed in a circular shape To.

本発明に係る熱交換器によれば、楕円形状または扁平円形状の伝熱管を用いるとともに、リターンベンドは内周面を伝熱管の外周面の形状と同一形状に形成し、外周面を円形に形成することで、空気側圧力損失が小さくかつ、管内熱伝達率が高く、加工性製造性がよい熱交換器を提供することができる。   According to the heat exchanger of the present invention, an elliptical or flat circular heat transfer tube is used, and the return bend has an inner peripheral surface formed in the same shape as the outer peripheral surface of the heat transfer tube, and the outer peripheral surface is circular. By forming the heat exchanger, it is possible to provide a heat exchanger having a small air-side pressure loss, a high in-tube heat transfer coefficient, and good workability manufacturability.

また、本発明に係る空気調和機によれば、空気側圧力損失が小さくかつ、管内熱伝達率が高く、加工性製造性がよい熱交換器を用いた空気調和機を提供することができる。   Moreover, according to the air conditioner which concerns on this invention, the air conditioner using the heat exchanger with a small air side pressure loss, a high heat transfer coefficient in a pipe | tube, and favorable workability manufacturability can be provided.

本発明に係る熱交換器及びこれを用いた冷凍サイクル装置の概念図。The conceptual diagram of the heat exchanger which concerns on this invention, and the refrigerating-cycle apparatus using the same. 本発明に係る熱交換器のリターンベンド取付け前の斜視図。The perspective view before the return bend attachment of the heat exchanger which concerns on this invention. 本発明に係る熱交換器に用いる伝熱管の断面図。Sectional drawing of the heat exchanger tube used for the heat exchanger which concerns on this invention. 本発明に係る熱交換器に用いる他の伝熱管の断面図。Sectional drawing of the other heat exchanger tube used for the heat exchanger which concerns on this invention. 本発明に係る熱交換器のリターンベンド取付け後の正面図。The front view after the return bend attachment of the heat exchanger which concerns on this invention. 本発明に係る熱交換器に用いるリターンベンドの平面図。The top view of the return bend used for the heat exchanger which concerns on this invention. 本発明に係る熱交換器の伝熱管とリターンベンドの接合部の横断面図。The cross-sectional view of the junction part of the heat exchanger tube and return bend of the heat exchanger which concerns on this invention. 本発明に係る熱交換器の伝熱管とリターンベンドの接合部の縦断面図。The longitudinal cross-sectional view of the junction part of the heat exchanger tube and return bend of the heat exchanger which concerns on this invention. 本発明に係る熱交換器に用いる伝熱管の変形例の断面図。Sectional drawing of the modification of the heat exchanger tube used for the heat exchanger which concerns on this invention. 本発明に係る熱交換器に用いる伝熱管の変形例とフィンの嵌着時の嵌着部の横断面図。The cross-sectional view of the modification of the heat exchanger tube used for the heat exchanger which concerns on this invention, and the fitting part at the time of fitting of a fin. 本発明に係る熱交換器に用いる伝熱管の変形例とフィンの嵌着時の嵌着部の縦断面図。The longitudinal cross-sectional view of the modification of the heat exchanger tube used for the heat exchanger which concerns on this invention, and the fitting part at the time of fitting of a fin. 本発明に係る熱交換器に用いる伝熱管の変形例とフィンの嵌着後の嵌着部の横断面図。The cross-sectional view of the modification of the heat exchanger tube used for the heat exchanger which concerns on this invention, and the fitting part after fitting of a fin. 本発明に係る熱交換器に用いる伝熱管の変形例の管内圧と短軸方向の変位の相関図。The correlation diagram of the pipe internal pressure of the modification of the heat exchanger tube used for the heat exchanger which concerns on this invention, and the displacement of a short-axis direction.

本発明の一実施形態に係る熱交換器及びこれを用いた空気調和機に用いる冷凍サイクル装置について、図面を参照して説明する。   A heat exchanger according to an embodiment of the present invention and a refrigeration cycle apparatus used in an air conditioner using the heat exchanger will be described with reference to the drawings.

図１に示すように、本発明に係る空気調和機は室外機２２Ａと室内機２２Ｂを備え、室外機２２Ａには冷凍サイクル装置２１の一部を構成し、冷媒を圧縮する圧縮機２３と、冷房運転あるいは暖房運転に応じて冷媒の流れを切り換える四方弁２４、冷房運転時凝縮器として機能し、暖房運転時蒸発器として機能する本発明に係る熱交換器としての室外熱交換器１と、冷媒を減圧する膨張装置２５とが収容され、室内機２２Ｂには冷凍サイクル装置２１の一部を構成し、冷房運転時蒸発器として機能し、暖房運転時凝縮器として機能する室内熱交換器２６が収容される。   As shown in FIG. 1, the air conditioner according to the present invention includes an outdoor unit 22A and an indoor unit 22B, and the outdoor unit 22A constitutes a part of the refrigeration cycle apparatus 21, and compresses a refrigerant 23. An outdoor heat exchanger 1 as a heat exchanger according to the present invention that functions as a four-way valve 24 that switches a refrigerant flow in accordance with a cooling operation or a heating operation, functions as a condenser during cooling operation, and functions as an evaporator during heating operation; An expansion device 25 for decompressing the refrigerant is accommodated, and the indoor unit 22B constitutes a part of the refrigeration cycle device 21, functions as an evaporator during cooling operation, and functions as a condenser during heating operation. Is housed.

図２に示すように、本発明に係る熱交換器である室外熱交換器１は、フィンチューブ型であり、互いに所定間隔を存して並設され、互いの隙間に熱交換空気を流通させる複数枚のアルミニウム製板状のフィン２を、非円形の伝熱管３がフィン２に穿設され、周囲にカラー部２ｂが突設された多数の貫通孔２ａを伝熱的に貫通している。   As shown in FIG. 2, the outdoor heat exchanger 1 that is a heat exchanger according to the present invention is a fin tube type, and is arranged in parallel with each other at a predetermined interval, and heat exchange air is circulated in the gaps between the two. A plurality of aluminum plate-like fins 2 are heat-transferred through a large number of through-holes 2a in which a non-circular heat transfer tube 3 is drilled in the fin 2 and a collar portion 2b is provided in the periphery. .

伝熱管３はフィン２の長手方向に沿って複数配列され、内部に熱交換媒体が流れる流路が設けられる。   A plurality of the heat transfer tubes 3 are arranged along the longitudinal direction of the fins 2, and a flow path through which the heat exchange medium flows is provided.

図３に示すように、伝熱管３の断面は非円形例えば楕円形状をなし、管外周面３ａ及び管内周面３ｂは楕円状をなしている。さらに、伝熱管３内に多数の流路３ｃ、３ｃ、３ｃを設けるために、伝熱管３内には、内部を略３分割するように平行な２個の仕切壁３ｄ、３ｄが設けられている。   As shown in FIG. 3, the cross section of the heat transfer tube 3 is non-circular, for example, an elliptical shape, and the outer peripheral surface 3a and the inner peripheral surface 3b of the tube are elliptical. Furthermore, in order to provide a large number of flow paths 3c, 3c, and 3c in the heat transfer tube 3, two parallel partition walls 3d and 3d are provided in the heat transfer tube 3 so as to divide the interior into approximately three parts. Yes.

なお、図４に示すように、伝熱管は断面を非円形例えば扁平円形状に形成し、内部を平行な２個の仕切壁３ｄ、３ｄによって仕切るようにした伝熱管３Ａであってもよい。   As shown in FIG. 4, the heat transfer tube may be a heat transfer tube 3A having a non-circular cross section, for example, a flat circular shape, and the inside being partitioned by two parallel partition walls 3d and 3d.

図５に示すように、フィン２を伝熱的に貫通する伝熱管３、３Ａの両端部には、この伝熱管３、３Ａの端部３ｅ同士を接続するリターンベンド４が溶着される。   As shown in FIG. 5, return bends 4 that connect the end portions 3 e of the heat transfer tubes 3 and 3 </ b> A are welded to both ends of the heat transfer tubes 3 and 3 </ b> A that pass through the fin 2 in a heat transfer manner.

リターンベンド４は、図６に示すように、Ｕ字状をなし、図７及び図８に示すように、ベンド外周面４ａは円形をなし、ベント内周面４ｂは伝熱管３、３Ａの管外周面３ａの形状と同一の楕円形状又は扁平円形状に形成される。   The return bend 4 is U-shaped as shown in FIG. 6, the bend outer peripheral surface 4a is circular as shown in FIGS. 7 and 8, and the vent inner peripheral surface 4b is a tube of the heat transfer tubes 3, 3A. It is formed in the same elliptical shape or flat circular shape as the shape of the outer peripheral surface 3a.

リターンベンド４は、アルミ合金の押出し製法により製造されるが、ベント外周面４ａが円形をなすことと内周面の短軸方向の肉厚が大きいことにより、曲げ加工時の管潰れを防止でき、Ｕ字状に加工し易い。   The return bend 4 is manufactured by an aluminum alloy extrusion manufacturing method, but the bent outer peripheral surface 4a has a circular shape and the inner peripheral surface has a large thickness in the minor axis direction, thereby preventing tube collapse during bending. , Easy to process into a U-shape.

また、伝熱管３、３Ａはアルミ合金の押出し管製法により製造されるが、この伝熱管３、３Ａは強度確保のため、内側に直線あるいは曲線形状の仕切壁３ｄ（図３、図４）を設ける。   The heat transfer tubes 3 and 3A are manufactured by an aluminum alloy extruded tube manufacturing method. The heat transfer tubes 3 and 3A are provided with a linear or curved partition wall 3d (FIGS. 3 and 4) on the inner side to ensure strength. Provide.

フィン２は長手方向が垂直方向に設置され、伝熱管３、３Ａは長軸方向を水平方向にして設置されている。機械拡管あるいは液圧拡管により、フィン２と管外周面３ａが伝熱的に密着結合される。   The fins 2 are installed such that the longitudinal direction is vertical, and the heat transfer tubes 3 and 3A are installed with the major axis direction being horizontal. The fins 2 and the pipe outer peripheral surface 3a are tightly coupled in a heat transfer manner by mechanical expansion or hydraulic expansion.

図５に示すように、熱交換器１の組立時、リターンベンド４により、伝熱管３、３Ａの端部３ｅをリターンベンド４に挿入して接合（ロー付）することができ、伝熱管３、３Ａの内部構造がどんな形状でもリターンベンド４と接合できる。また、伝熱管３、３Ａの接続に、ヘッダーを用いることなく、リターンベンド４を用いるので、ヘッダー方式の分流の不具合を生じることもない。   As shown in FIG. 5, when assembling the heat exchanger 1, the end 3 e of the heat transfer tubes 3, 3 </ b> A can be inserted into the return bend 4 by the return bend 4 to join (with brazing). 3A can be joined to the return bend 4 in any shape. Further, since the return bend 4 is used for the connection of the heat transfer tubes 3 and 3A without using the header, there is no problem with the header type diversion.

さらに、図３あるいは図４に示すように、伝熱管３、３Ａの内部を多流路化することも容易にでき、また、伝熱管３、３Ａの耐圧強度が向上し、高圧冷媒下での室外熱交換器１の使用も可能になる。   Furthermore, as shown in FIG. 3 or FIG. 4, the inside of the heat transfer tubes 3 and 3A can be easily made into multi-channels, and the pressure resistance of the heat transfer tubes 3 and 3A is improved, so that The use of the outdoor heat exchanger 1 is also possible.

また、本発明に係る熱交換器としての室外熱交換器１に用いる伝熱管の変形例について説明する。   Moreover, the modification of the heat exchanger tube used for the outdoor heat exchanger 1 as a heat exchanger which concerns on this invention is demonstrated.

上記実施形態における伝熱管が連続する仕切壁によって仕切られるのに対して、本変形例は仕切壁が上下に２分割される。   In contrast to the heat transfer tubes in the above embodiment that are partitioned by a continuous partition wall, in this modification, the partition wall is vertically divided into two.

例えば、図９に示すように、伝熱管３Ｂの断面は非円形例えば楕円形状をなし、内部に４個の流路３１ｃ、３１ｃ、３１ｃ、３１ｃが形成されるように、管内周面３１ｂから突出する平行な３対の仕切壁３１ｄ、３１ｄ、３１ｄが設けられている。   For example, as shown in FIG. 9, the cross section of the heat transfer tube 3B is non-circular, for example, an elliptical shape, and protrudes from the tube inner peripheral surface 31b so that four flow paths 31c, 31c, 31c, 31c are formed therein. Three parallel pairs of partition walls 31d, 31d, 31d are provided.

仕切壁３１ｄは管内周面３１ｂの上部から下方に向かって突出するＬ字形状の上仕切壁３１ｄ１と、管内周面３１ｂの下部から上方に向かって突出するＬ字形状の下仕切壁３１ｄ２からなり、上Ｌ字先端部３１ｄ３が下Ｌ字先端部３１ｄ４の下方に位置するとともに、上Ｌ字先端部３１ｄ３と下Ｌ字先端部３１ｄ４が間隔δを有して互いに対向するように設けられている。 Partition wall 31d and the partitioning wall 31d 1 on the L-shape protruding from an upper portion of the pipe peripheral surface 31b downward, L-shaped lower partition wall 31d of the shape 2 that protrudes toward the bottom of the tube circumference 31b upward The upper L-shaped tip 31d 3 is positioned below the lower L-shaped tip 31d 4 , and the upper L-shaped tip 31d 3 and the lower L-shaped tip 31d 4 face each other with a gap δ. It is provided as follows.

伝熱管３Ｂは、アルミ合金材にて押出しにより製造され、仕切壁３１ｄは伝熱管（管体）３Ｂと一体構造である。隙間δは短軸径の５〜１５％程度に設定する。   The heat transfer tube 3B is manufactured by extrusion using an aluminum alloy material, and the partition wall 31d has an integral structure with the heat transfer tube (tube body) 3B. The gap δ is set to about 5 to 15% of the minor axis diameter.

図１０及び図１１は、本熱交換器１の製造時における伝熱管３Ｂのフィン２への貫通状態を示し、フィン２の貫通孔２ａと伝熱管３Ｂの管外周面３ａ間には間隙ｇが設けられ、上Ｌ字先端部３１ｄ３、下Ｌ字先端部３１ｄ４間には、間隔δが設けられる。 10 and 11 show the state of penetration of the heat transfer tubes 3B into the fins 2 when the heat exchanger 1 is manufactured, and there is a gap g between the through holes 2a of the fins 2 and the tube outer peripheral surface 3a of the heat transfer tubes 3B. An interval δ is provided between the upper L-shaped tip portion 31d 3 and the lower L-shaped tip portion 31d 4 .

図１２は、本熱交換器１における伝熱管３Ｂのフィン２への伝熱的貫通（嵌着）状態を示し、伝熱管３Ｂの拡管後の状態である。   FIG. 12 shows a heat transfer penetration (fitting) state of the heat transfer tubes 3B to the fins 2 in the present heat exchanger 1, and is a state after the heat transfer tubes 3B are expanded.

拡管時、図１０に示す状態から、伝熱管３Ｂ内を加圧すると、長軸に対して直角方向に外壁が伸びる。このように、圧力により、伝熱管３Ｂの外形を拡げ、フィン２との密着を容易にできる。   When expanding the tube, when the inside of the heat transfer tube 3B is pressurized from the state shown in FIG. 10, the outer wall extends in a direction perpendicular to the major axis. Thus, the outer shape of the heat transfer tube 3B can be expanded by the pressure, and the close contact with the fins 2 can be facilitated.

伝熱管３Ｂの拡管（管体の伸び）につれ仕切壁３１ｄが上下に移動し、上Ｌ字先端部３１ｄ３と下Ｌ字先端部３１ｄ４間の隙間δが減少する。さらに圧力を上げると、上Ｌ字先端部３１ｄ３と下Ｌ字先端部３１ｄ４が噛合う状態が発生する。 Partition wall 31d is moved up and down as the tube expansion of the heat transfer tube 3B (elongation of the tube), the gap between the lower and upper L-shaped distal end 31d 3 L-tip 31d 4 [delta] decreases. When the pressure is further increased, the upper L-shaped tip 31d 3 and the lower L-shaped tip 31d 4 are engaged with each other.

内圧が上記圧力より大きくなると、仕切壁３１ｄが補強壁となり、変形しにくくなる。   When the internal pressure becomes larger than the above pressure, the partition wall 31d becomes a reinforcing wall and is hardly deformed.

この状態を具体的に説明すると、図１３に示すように、拡管域すなわち上Ｌ字先端部３１ｄ３と下Ｌ字先端部３１ｄ４が噛合う迄は、伝熱管３Ｂの短軸方向は変位する（伸びる）。 Specifically describing this state, as shown in FIG. 13, the tube expanding region ie above L-shaped distal end 31d 3 and the lower L-shaped distal end 31d 4 is until meshes, minor axis direction of the heat transfer tube 3B is displaced (extend).

上Ｌ字先端部３１ｄ３と下Ｌ字先端部３１ｄ４の噛合い後は、設計圧力の３〜４倍の圧力がかかっても、伝熱管３Ｂの短軸方向は変位を抑えることができる。さらに、伝熱管３Ｂの耐圧向上により、高圧冷媒下での熱交換器１の使用も可能になる。 After the upper L-shaped tip portion 31d 3 and the lower L-shaped tip portion 31d 4 are engaged, even if a pressure 3 to 4 times the design pressure is applied, displacement in the short axis direction of the heat transfer tube 3B can be suppressed. Furthermore, the use of the heat exchanger 1 under a high-pressure refrigerant is also possible by improving the pressure resistance of the heat transfer tube 3B.

このように、熱交換器１の製造時における楕円形状の伝熱管３Ｂの管強度を大幅に向上させることができ、拡管が可能な熱交換器用楕円管を提供できる。   Thus, the tube strength of the elliptical heat transfer tube 3B at the time of manufacturing the heat exchanger 1 can be significantly improved, and an elliptic tube for heat exchanger that can be expanded can be provided.

また、伝熱管３Ｂの強度が向上するとともに、楕円形状をなすことにより、空気調和機に用いた場合、熱交換器３Ｂを通過する空気抵抗が減少し、熱交換率が向上する。さらに、フィンカラー部に溜まるドレン水を排水し易く、また、室外機の熱交換器として用いた場合、フィンに付いた霜を除霜するのが容易である。   In addition, the strength of the heat transfer tube 3B is improved, and by forming an elliptical shape, when used in an air conditioner, the air resistance passing through the heat exchanger 3B is reduced, and the heat exchange rate is improved. Furthermore, drain water collected in the fin collar portion can be easily drained, and when used as a heat exchanger for an outdoor unit, it is easy to defrost frost attached to the fins.

なお、本冷凍サイクル装置の室外熱交換器に、本発明に係る熱交換器を用いる例で説明したが、室内熱交換器のみに、あるいは室外熱交換器と室内熱交換器の両熱交換器に本発明に係る熱交換器を用いることもできる。   In addition, although demonstrated in the example which uses the heat exchanger which concerns on this invention for the outdoor heat exchanger of this refrigeration cycle apparatus, it is only an indoor heat exchanger, or both heat exchangers of an outdoor heat exchanger and an indoor heat exchanger The heat exchanger according to the present invention can also be used.

上記のように、本実施形態の熱交換器によれば、楕円形状または扁平円形状の伝熱管を用いるとともに、リターンベンドは内周面を伝熱管の外周面の形状と同一形状に形成し、外周面を円形に形成することで、空気側圧力損失が小さくかつ、管内熱伝達率が高く、加工性製造性がよい熱交換器が実現する。   As described above, according to the heat exchanger of the present embodiment, while using an elliptical or flat circular heat transfer tube, the return bend forms the inner peripheral surface in the same shape as the outer peripheral surface of the heat transfer tube, By forming the outer peripheral surface in a circular shape, a heat exchanger with low air-side pressure loss, high in-tube heat transfer coefficient, and good workability and manufacturability is realized.

また、本実施形態の熱交換器を用いた空気調和機によれば、空気側圧力損失が小さくかつ、管内熱伝達率が高く、加工性製造性がよい熱交換器を用いた空気調和機が実現する。   Moreover, according to the air conditioner using the heat exchanger of the present embodiment, the air conditioner using the heat exchanger having a small air-side pressure loss, a high heat transfer coefficient in the pipe, and good workability manufacturability. Realize.

１…室外熱交換器、２…フィン、２ａ…貫通孔、２ｂ…カラー部、３…伝熱管、３ａ…管外周面、３ｂ…管内周面、３ｃ…流路、３ｄ…仕切壁、３ｅ…端部、４…リターンベンド、４ａ…ベンド外周面、４ｂ…ベント内周面、２１…冷凍サイクル装置、２２Ａ…室外機、２２Ｂ…室内機、２３…圧縮機、２４…四方弁、２５…膨張装置、２６…室内熱交換器。   DESCRIPTION OF SYMBOLS 1 ... Outdoor heat exchanger, 2 ... Fin, 2a ... Through-hole, 2b ... Collar part, 3 ... Heat transfer pipe, 3a ... Pipe outer peripheral surface, 3b ... Pipe inner peripheral surface, 3c ... Channel, 3d ... Partition wall, 3e ... End part, 4 ... Return bend, 4a ... Bend outer peripheral surface, 4b ... Vent inner peripheral surface, 21 ... Refrigeration cycle device, 22A ... Outdoor unit, 22B ... Indoor unit, 23 ... Compressor, 24 ... Four-way valve, 25 ... Expansion Apparatus, 26 ... indoor heat exchanger.

Claims (3)

互いに所定間隔を存して並設され、互いの隙間に熱交換空気を流通させる複数枚のフィンと、
このフィンを貫通しかつ、フィンの長手方向に沿って配列され、内部に熱交換媒体を導通させる流路を形成する伝熱管と、
この伝熱管の端部同士を接続するＵ字状のリターンベンドとを具備した熱交換器において、
前記伝熱管は、外周面が楕円形状または扁平円形状を有し、
前記リターンベンドは、内周面が前記伝熱管の外周面の形状と同一形状に形成されかつ、外周面が円形に形成されたことを特徴とする熱交換器。 A plurality of fins that are arranged in parallel with each other at a predetermined interval and distribute heat exchange air in the gap between each other;
A heat transfer tube that penetrates the fins and is arranged along the longitudinal direction of the fins, and forms a flow path through which the heat exchange medium is conducted;
In the heat exchanger having a U-shaped return bend connecting the ends of the heat transfer tubes,
The heat transfer tube has an elliptical or flat circular outer peripheral surface;
The return bend is a heat exchanger characterized in that an inner peripheral surface is formed in the same shape as an outer peripheral surface of the heat transfer tube, and an outer peripheral surface is formed in a circular shape. 前記伝熱管には、管内に仕切壁を設けて、多流路化された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 heat transfer tube is provided with a partition wall in the tube to form a multi-channel. 圧縮機、四方切換弁、室外熱交換器、膨張装置、室内熱交換器を冷媒配管で連結した冷凍サイクルを備えた空気調和機において、
前記室外熱交換器および前記室内熱交換器の少なくともいずれか一方は、
互いに所定間隔を存して並設され、互いの隙間に熱交換空気を流通させる複数枚のフィンと、
このフィンを貫通しかつ、フィンの長手方向に沿って配列され、内部に熱交換媒体を導通させる流路を形成する伝熱管と、
この伝熱管の端部同士を接続するＵ字状のリターンベンドとを具備し、
前記伝熱管の外周面が楕円形状または扁平円形状を有し、
前記リターンベンドは内周面が前記伝熱管の外周面の形状と同一形状に形成されかつ、外周面が円形に形成されたことを特徴とする空気調和機。 In an air conditioner having a refrigeration cycle in which a compressor, a four-way switching valve, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger are connected by a refrigerant pipe,
At least one of the outdoor heat exchanger and the indoor heat exchanger is
A plurality of fins that are arranged in parallel with each other at a predetermined interval and distribute heat exchange air in the gap between each other;
A heat transfer tube that penetrates the fins and is arranged along the longitudinal direction of the fins, and forms a flow path through which the heat exchange medium is conducted;
A U-shaped return bend connecting the ends of the heat transfer tubes,
The outer peripheral surface of the heat transfer tube has an elliptical shape or a flat circular shape,
The return bend has an inner peripheral surface formed in the same shape as the outer peripheral surface of the heat transfer tube, and the outer peripheral surface is formed in a circular shape.
JP2009051904A 2009-03-05 2009-03-05 Heat exchanger, air conditioner Expired - Fee Related JP5128522B2 (en)

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