JP2016050719A - Heat exchanger - Google Patents

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JP2016050719A
JP2016050719A JP2014176723A JP2014176723A JP2016050719A JP 2016050719 A JP2016050719 A JP 2016050719A JP 2014176723 A JP2014176723 A JP 2014176723A JP 2014176723 A JP2014176723 A JP 2014176723A JP 2016050719 A JP2016050719 A JP 2016050719A
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heat exchanger
flat tube
tube heat
header
flat
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JP6582373B2 (en
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慶成 前間
Yoshinari Maema
慶成 前間
佑 廣崎
Yu Hirosaki
佑 廣崎
美弘 佐々木
Yoshihiro Sasaki
美弘 佐々木
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Fujitsu General Ltd
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  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

PROBLEM TO BE SOLVED: To improve a passing air amount and heat exchange efficiency in an upstream side flat tube heat exchanger unit, in a heat exchanger in which a plurality of rows of flat tube heat exchanger units are arranged.SOLUTION: A heat exchanger at least includes two flat tube heat exchanger units 10 including: a plurality of flat tubes 20 which are arrayed vertically and through which a refrigerant circulates; a plurality of fins 40 which are laminated by crossing the flat tubes and having a gap for allowing air to pass, and which have a notch part 41 opening in one direction so as to insert in an orthogonal direction of each flat tube; and headers 30 which are mounted on both ends of the plurality of flat tubes and which allow the refrigerant to branch and join inside. The notch part has depth which is the same as width in the cross-sectional longitudinal direction of the flat tube. The header, in a lateral view, has one contour line of the header with a distance L1 at further outside than one end part which has the notch part of the fin.SELECTED DRAWING: Figure 3

Description

本発明は、空気調和機等に用いられる熱交換器に関する。   The present invention relates to a heat exchanger used for an air conditioner or the like.

空気調和機等に用いられる熱交換器では、高価格である銅材の削減及び伝熱効率を向上させる目的で、銅製である従来の円管熱交換器ユニットからアルミ製の扁平管熱交換器ユニットへの変更が検討されている（例えば、特許文献１参照）。扁平管熱交換器ユニットは、冷媒が流通する複数の扁平管と、複数の扁平管の両端に取り付けられ冷媒を分流させるヘッダと、扁平管に設けられる複数のフィンと、を備えている。   In heat exchangers used for air conditioners, etc., aluminum flat tube heat exchanger units are replaced with conventional copper tube heat exchanger units made of copper for the purpose of reducing high-priced copper materials and improving heat transfer efficiency. The change to is considered (for example, refer to Patent Document 1). The flat tube heat exchanger unit includes a plurality of flat tubes through which the refrigerant circulates, headers attached to both ends of the plurality of flat tubes and diverting the refrigerant, and a plurality of fins provided in the flat tubes.

図６は、従来例に係る扁平管熱交換器ユニット２００を示しており、この扁平管熱交換器ユニット２００は、平板状のフィン２０１を備える。フィン２０１は、風上側に向く方向から扁平管２０２を差し込むための切欠き部２０１ａを有し、正面視において扁平管２０２の長さ方向と直交する方向に差し込んで配置される。そして、フィン２０１の空気流通方向の幅は、扁平管２０２及びヘッダ２０３よりも大きくなっている。したがって、フィン２０１は、側面視においてヘッダ２０３から空気が流通する風上方向及び風下方向に突出している。また、扁平管２０２は、空気流通方向（断面長手方向ともいう。）に延びた扁平な形状を有し、その内部には、空気流通方向に並ぶ複数の冷媒流路２０２ａが平行に形成されている。なお、冷媒流路２０２ａを有する扁平管２０２の断面を図６（ｅ）に示すが、その他の図における扁平管２０２の断面は、冷媒流路２０２ａを省略し、単なるハッチングとする。   FIG. 6 shows a flat tube heat exchanger unit 200 according to a conventional example, and the flat tube heat exchanger unit 200 includes flat fins 201. The fin 201 has a notch 201a for inserting the flat tube 202 from the direction facing the windward side, and is inserted in a direction orthogonal to the length direction of the flat tube 202 in a front view. And the width | variety of the air distribution direction of the fin 201 is larger than the flat tube 202 and the header 203. FIG. Therefore, the fin 201 protrudes in the windward direction and the leeward direction in which air flows from the header 203 in a side view. The flat tube 202 has a flat shape extending in the air flow direction (also referred to as a longitudinal direction of the cross section), and a plurality of refrigerant flow paths 202a arranged in parallel in the air flow direction are formed in the inside thereof. Yes. In addition, although the cross section of the flat tube 202 which has the refrigerant | coolant flow path 202a is shown in FIG.6 (e), the cross section of the flat tube 202 in another figure omits the refrigerant | coolant flow path 202a, and is only hatching.

近年、熱交換器の熱交換効率を向上させる目的で、複数の熱交換器を空気流通方向に多列配置することが提案されている。   In recent years, in order to improve the heat exchange efficiency of a heat exchanger, it has been proposed to arrange a plurality of heat exchangers in multiple rows in the air flow direction.

このとき、ヘッダ２０３同士の間での熱交換を防止するために、上流側扁平管熱交換器ユニット２００のヘッダ２０３と下流側扁平管熱交換器ユニット２００のヘッダ２０３との間に所定の隙間Ｓ３を確保する必要がある。これは、ヘッダ２０３同士で熱交換してしまうと扁平管熱交換器ユニット２００を流れる冷媒と空気との熱交換量が減少してしまうためである。図６に示す従来例の扁平管熱交換器ユニット２００を多列配置する場合は、図７に示すように、上流側扁平管熱交換器ユニット２００のヘッダ２０３と下流側扁平管熱交換器ユニット２００のヘッダ２０３との間に所定の隙間Ｓ３を確保しつつ、上流側扁平管熱交換器ユニット２００と下流側扁平管熱交換器ユニット２００のフィン２０１同士を接触又は近接状態で配置することが可能である。しかし、フィン２０１の風上側の端部には切欠き部２０１ａによる隙間Ｓ４が存在するので、隙間Ｓ３から流入した空気Ａが、フィン２０１間の隙間Ｓ４を経由して下流側扁平管熱交換器ユニット２００に流れ込み、上流側扁平管熱交換器ユニット２００における通過空気量及び熱交換効率が低下してしまうという問題があった。   At this time, in order to prevent heat exchange between the headers 203, a predetermined gap is provided between the header 203 of the upstream flat tube heat exchanger unit 200 and the header 203 of the downstream flat tube heat exchanger unit 200. It is necessary to secure S3. This is because the amount of heat exchange between the refrigerant flowing through the flat tube heat exchanger unit 200 and the air is reduced when heat is exchanged between the headers 203. When multiple rows of flat tube heat exchanger units 200 of the conventional example shown in FIG. 6 are arranged, as shown in FIG. 7, the header 203 of the upstream flat tube heat exchanger unit 200 and the downstream flat tube heat exchanger unit The fins 201 of the upstream flat tube heat exchanger unit 200 and the downstream flat tube heat exchanger unit 200 may be arranged in contact with each other or in proximity to each other while securing a predetermined gap S3 with the header 203 of the 200. Is possible. However, since there is a gap S4 due to the notch 201a at the windward end of the fin 201, the air A flowing in from the gap S3 passes through the gap S4 between the fins 201, and the downstream flat tube heat exchanger. There was a problem that the air flow into the unit 200 and the amount of air passing through the upstream flat tube heat exchanger unit 200 and the heat exchange efficiency were lowered.

特開２０１３−１６４２３３号公報JP 2013-164233 A

そこで、本発明は、上記の問題点に鑑みなされたものであって、扁平管熱交換器ユニットを多列配置するものでありながら、ヘッダ同士の間に隙間を確保しながら扁平管熱交換器ユニット間の隙間からの空気の流入を抑制し、上流側扁平管熱交換器ユニットにおける通過空気量の減少を抑え熱交換効率を向上させることができる熱交換器の提供を目的とする。   Therefore, the present invention has been made in view of the above-described problems, and is a flat tube heat exchanger while securing a gap between headers while arranging multiple rows of flat tube heat exchanger units. An object of the present invention is to provide a heat exchanger that can suppress the inflow of air from the gap between the units, suppress the decrease in the amount of air passing through the upstream flat tube heat exchanger unit, and improve the heat exchange efficiency.

本発明は上記目的を達成するために提案されたものである。   The present invention has been proposed to achieve the above object.

（１）本発明に係る１つの態様は、上下に配列され、内部に冷媒が流通する複数の扁平管と、前記扁平管に交差し空気を通過させるための隙間を設けて積層され、各前記扁平管の長さ方向と直交する方向から差し込むために一方向に開放する切欠き部を有する複数のフィンと、前記複数の扁平管の長さ方向の両端に取り付けられ内部で冷媒を分流・合流させる一対のヘッダとを備えた扁平管熱交換器ユニットを少なくとも２つ以上有する熱交換器であって、前記切欠き部が前記扁平管の断面長手方向の幅と同じ深さを有し、前記ヘッダは、前記熱交換器を前記扁平管の長さ方向から見たとき、前記フィンの前記切欠き部を有する一方の端部から外側の前記ヘッダの一方の外郭線までを距離Ｌ１とし、かつ、前記フィンの他方の端部から内側の前記ヘッダの他方の外郭線までを距離Ｌ２とするように形成され、前記距離Ｌ２が前記距離Ｌ１よりも大きいことを特徴とする。 (1) According to one aspect of the present invention, a plurality of flat tubes that are arranged one above the other and in which a refrigerant circulates, and a gap that crosses the flat tubes and allows air to pass therethrough are stacked, A plurality of fins having notches that open in one direction to be inserted from a direction perpendicular to the length direction of the flat tube, and the refrigerant are divided and merged inside the flat tube at both ends in the length direction. A heat exchanger having at least two flat tube heat exchanger units provided with a pair of headers, wherein the notch has the same depth as the width in the cross-sectional longitudinal direction of the flat tube, When the header is viewed from the length direction of the flat tube, the header has a distance L1 from one end portion having the notch portion of the fin to one outer line of the outer header, and , Inside of the other end of the fin Is formed up to the other contour of the serial header to the distance L2, the distance L2 is equal to or greater than the distance L1.

（２）上記（１）の熱交換器において、前記距離Ｌ２と前記距離Ｌ１との差α（＝Ｌ２−Ｌ１）は、所定の距離に設定されてもよい。
（３）上記（１）又は（２）の熱交換器において、前記少なくとも２つの扁平管熱交換器ユニットが第１の扁平管熱交換器ユニットと第２の扁平管熱交換器ユニットとを含み、前記第１の扁平管熱交換器ユニットのフィンの風下側端部が前記第２の扁平管熱交換器ユニットのフィンの風上側端部に近接又は接触する状態で並べて配置されてもよい。 (2) In the heat exchanger of (1), a difference α (= L2−L1) between the distance L2 and the distance L1 may be set to a predetermined distance.
(3) In the heat exchanger according to (1) or (2), the at least two flat tube heat exchanger units include a first flat tube heat exchanger unit and a second flat tube heat exchanger unit. The fins of the first flat tube heat exchanger unit may be arranged side by side so that the leeward side ends of the fins are close to or in contact with the windward side ends of the fins of the second flat tube heat exchanger unit.

本発明によれば、扁平管熱交換器ユニットを多列配置する熱交換器において、扁平管熱交換器ユニット間の隙間から空気が流入することを抑制し、上流側扁平管熱交換器ユニットにおける通過空気量の減少を抑え熱交換効率を向上させることができる。   According to the present invention, in the heat exchanger in which the flat tube heat exchanger units are arranged in multiple rows, the inflow of air from the gaps between the flat tube heat exchanger units is suppressed, and the upstream flat tube heat exchanger unit It is possible to improve the heat exchange efficiency by suppressing a decrease in the amount of passing air.

本発明の実施形態に係る熱交換器を含む空気調和機の構成を示す説明図である。It is explanatory drawing which shows the structure of the air conditioner containing the heat exchanger which concerns on embodiment of this invention. 本発明の実施形態に係る熱交換器が備える扁平管熱交換器ユニットの図であり、（ａ）は扁平管熱交換器ユニットの平面図、（ｂ）は扁平管熱交換器ユニットの正面図、（ｃ）は扁平管熱交換器ユニットの側面図、（ｄ）は扁平管熱交換器ユニットの要部側面断面図である。It is a figure of the flat tube heat exchanger unit with which the heat exchanger concerning the embodiment of the present invention is provided, (a) is a top view of a flat tube heat exchanger unit, (b) is a front view of a flat tube heat exchanger unit. (C) is a side view of a flat tube heat exchanger unit, (d) is a principal part side surface sectional view of a flat tube heat exchanger unit. 本発明の実施形態に係る熱交換器が備える扁平管熱交換器ユニットの要部拡大側面断面図である。It is a principal part expanded side sectional view of the flat tube heat exchanger unit with which the heat exchanger which concerns on embodiment of this invention is provided. 本発明の実施形態に係る熱交換器における扁平管熱交換器ユニットの第１配置例を示す図であり、（ａ）は多列配置された扁平管熱交換器ユニットの平面図、（ｂ）は多列配置された扁平管熱交換器ユニットの要部側面断面図である。It is a figure which shows the 1st example of arrangement | positioning of the flat tube heat exchanger unit in the heat exchanger which concerns on embodiment of this invention, (a) is a top view of the flat tube heat exchanger unit arranged in multiple rows, (b) FIG. 3 is a side cross-sectional view of a main part of flat tube heat exchanger units arranged in multiple rows. 本発明の実施形態に係る熱交換器における扁平管熱交換器ユニットの第２配置例を示す図であり、（ａ）は多列配置された扁平管熱交換器ユニットの平面図、（ｂ）は多列配置された扁平管熱交換器ユニットの要部側面断面図である。It is a figure which shows the 2nd example of arrangement | positioning of the flat tube heat exchanger unit in the heat exchanger which concerns on embodiment of this invention, (a) is a top view of the flat tube heat exchanger unit arranged in multiple rows, (b) FIG. 3 is a side cross-sectional view of a main part of flat tube heat exchanger units arranged in multiple rows. 従来例に係る扁平管熱交換器ユニットの図であり、（ａ）は扁平管熱交換器ユニットの平面図、（ｂ）は扁平管熱交換器ユニットの正面図、（ｃ）は扁平管熱交換器ユニットの側面図、（ｄ）は扁平管熱交換器ユニットの要部側面断面図、（ｅ）は扁平管の断面図である。It is a figure of the flat tube heat exchanger unit which concerns on a prior art example, (a) is a top view of a flat tube heat exchanger unit, (b) is a front view of a flat tube heat exchanger unit, (c) is flat tube heat. The side view of an exchanger unit, (d) is principal part side surface sectional drawing of a flat tube heat exchanger unit, (e) is sectional drawing of a flat tube. 従来例２に係る扁平管熱交換器ユニットの配置例を示す図であり、（ａ）は多列配置された扁平管熱交換器ユニットの平面図、（ｂ）は多列配置された扁平管熱交換器ユニットの要部側面断面図である。It is a figure which shows the example of arrangement | positioning of the flat tube heat exchanger unit which concerns on the prior art example 2, (a) is a top view of the flat tube heat exchanger unit arranged in multiple rows, (b) is the flat tube arranged in multiple rows It is principal part side surface sectional drawing of a heat exchanger unit.

以下、本発明に係る好適な実施形態について、図面を参照しながら詳細に説明する。なお、実施形態の説明の全体を通じて同じ要素には同じ符号を付して説明する。   DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the drawings. Note that the same reference numerals are given to the same elements throughout the description of the embodiment.

図１は、本発明の実施形態に係る熱交換器を含む空気調和機の構成を示す説明図である。図１に示すように、空気調和機１は、室内機２と室外機３とを備えて構成されている。室内機２には、後述する２つの扁平管熱交換器ユニット１０を空気流通方向に並べて配置して構成される室内熱交換器４が設けられ、室外機３には、任意の熱交換器ユニットを用いて構成される室外熱交換器５の他に、圧縮機６、膨張弁７及び四方弁８が設けられている。   Drawing 1 is an explanatory view showing the composition of the air harmony machine containing the heat exchanger concerning the embodiment of the present invention. As shown in FIG. 1, the air conditioner 1 includes an indoor unit 2 and an outdoor unit 3. The indoor unit 2 is provided with an indoor heat exchanger 4 configured by arranging two flat tube heat exchanger units 10 (to be described later) side by side in the air flow direction, and the outdoor unit 3 includes an arbitrary heat exchanger unit. In addition to the outdoor heat exchanger 5 configured using the above, a compressor 6, an expansion valve 7 and a four-way valve 8 are provided.

暖房運転時には、室外機３の圧縮機６から吐出した高温高圧のガス冷媒が四方弁８を介して室内機２の室内熱交換器４に流入する。室内熱交換器４（凝縮器）で空気と熱交換した冷媒は凝縮し液化する。このように、室内熱交換器４が凝縮器として機能し、室内熱交換器４で冷媒と熱交換を行い加熱された室内空気が室内に吹き出されることによって、室内機２が設置された室内の暖房が行われる。その後、高圧の液冷媒は、室外機３の膨張弁７を通過することによって減圧され、低温低圧の気液二相冷媒となり室外熱交換器５へ流入する。室外熱交換器５（蒸発器）で外気と熱交換した冷媒はガス化する。その後、低圧のガス冷媒は、四方弁８を介して圧縮機６に吸入される。   During the heating operation, the high-temperature and high-pressure gas refrigerant discharged from the compressor 6 of the outdoor unit 3 flows into the indoor heat exchanger 4 of the indoor unit 2 through the four-way valve 8. The refrigerant that exchanges heat with air in the indoor heat exchanger 4 (condenser) is condensed and liquefied. Thus, the indoor heat exchanger 4 functions as a condenser, and heat is exchanged with the refrigerant in the indoor heat exchanger 4 so that heated indoor air is blown out into the room, whereby the indoor unit 2 is installed. The heating is done. Thereafter, the high-pressure liquid refrigerant is depressurized by passing through the expansion valve 7 of the outdoor unit 3, becomes a low-temperature low-pressure gas-liquid two-phase refrigerant, and flows into the outdoor heat exchanger 5. The refrigerant that has exchanged heat with the outside air in the outdoor heat exchanger 5 (evaporator) is gasified. Thereafter, the low-pressure gas refrigerant is sucked into the compressor 6 through the four-way valve 8.

冷房運転時には、室外機３の圧縮機６から吐出した高温高圧のガス冷媒が四方弁８を介して室外熱交換器５に流入する。室外熱交換器５（凝縮器）で外気と熱交換した冷媒は凝縮し液化する。その後、高圧の液冷媒は、室外機３の膨張弁７を通過することによって減圧され、低温低圧の気液二相冷媒となり、室内機２の室内熱交換器４へ流入する。室内熱交換器４（蒸発器）で空気と熱交換した冷媒はガス化する。このように、室内熱交換器４が蒸発器として機能し、室内熱交換器４で冷媒と熱交換を行い冷却された室内空気が室内に吹き出されることによって、室内機２が設置された室内の冷房が行われる。その後、低圧のガス冷媒は、四方弁８を介して圧縮機６に吸入される。   During the cooling operation, the high-temperature and high-pressure gas refrigerant discharged from the compressor 6 of the outdoor unit 3 flows into the outdoor heat exchanger 5 through the four-way valve 8. The refrigerant that has exchanged heat with the outside air in the outdoor heat exchanger 5 (condenser) is condensed and liquefied. Thereafter, the high-pressure liquid refrigerant is decompressed by passing through the expansion valve 7 of the outdoor unit 3, becomes a low-temperature low-pressure gas-liquid two-phase refrigerant, and flows into the indoor heat exchanger 4 of the indoor unit 2. The refrigerant that exchanges heat with air in the indoor heat exchanger 4 (evaporator) is gasified. Thus, the indoor heat exchanger 4 functions as an evaporator, the indoor heat exchanger 4 exchanges heat with the refrigerant, and the indoor air cooled is blown into the room, whereby the indoor unit 2 is installed. Cooling is performed. Thereafter, the low-pressure gas refrigerant is sucked into the compressor 6 through the four-way valve 8.

図２は、本発明の実施形態に係る室内熱交換器が備える扁平管熱交換器ユニットの図であり、（ａ）は扁平管熱交換器ユニットの平面図、（ｂ）は扁平管熱交換器ユニットの正面図、（ｃ）は扁平管熱交換器ユニットの側面図、（ｄ）は（ｂ）の扁平管熱交換器ユニットの切断線Ｘにおける断面図、図３は、図２（ｂ）の扁平管熱交換器ユニットの切断線Ｘにおける拡大断面図である。図２及び図３に示すように、扁平管熱交換器ユニット１０は、冷媒が流通する複数の扁平管２０と、扁平管２０の両端に取り付けられる一対のヘッダ３０と、扁平管２０と交差し空気を通過させるための隙間を設けて積層された複数のフィン４０と、を備えて構成されたパラレルフロー型熱交換器である。なお、本実施形態の扁平管２０、ヘッダ３０及びフィン４０は、アルミニウム又はアルミニウム合金で形成されている。   FIG. 2 is a diagram of a flat tube heat exchanger unit provided in an indoor heat exchanger according to an embodiment of the present invention, where (a) is a plan view of the flat tube heat exchanger unit, and (b) is a flat tube heat exchanger. (C) is a side view of the flat tube heat exchanger unit, (d) is a cross-sectional view of the flat tube heat exchanger unit of (b) taken along the cutting line X, and FIG. It is an expanded sectional view in cutting line X of a flat tube heat exchanger unit of). As shown in FIGS. 2 and 3, the flat tube heat exchanger unit 10 intersects the flat tubes 20, a plurality of flat tubes 20 through which refrigerant flows, a pair of headers 30 attached to both ends of the flat tubes 20, and the flat tubes 20. It is a parallel flow type heat exchanger comprising a plurality of fins 40 stacked with a gap for allowing air to pass therethrough. In addition, the flat tube 20, the header 30, and the fin 40 of this embodiment are formed with aluminum or aluminum alloy.

扁平管２０は、空気流通方向（断面長手方向ともいう。）に延びた扁平な形状を有し、その内部には、空気流通方向に並ぶ複数の冷媒流路２１が平行に形成されている。なお、冷媒流路２１を有する扁平管２０の断面を図３に示すが、その他の図における扁平管２０の断面は、冷媒流路２１を省略し、単なるハッチングとする。   The flat tube 20 has a flat shape extending in the air circulation direction (also referred to as a cross-sectional longitudinal direction), and a plurality of refrigerant channels 21 aligned in the air circulation direction are formed in parallel inside the flat tube 20. In addition, although the cross section of the flat tube 20 which has the refrigerant | coolant flow path 21 is shown in FIG. 3, the refrigerant | coolant flow path 21 is abbreviate | omitted and the cross section of the flat tube 20 in another figure is only hatching.

扁平管２０は、空気が通過するための隙間を設けて平行に配置され、その両端部が一対のヘッダ３０に接続される。例えば、図２の（ｂ）に示す扁平管熱交換器ユニット１０では、左右方向に伸びる複数の扁平管２０が一対のヘッダ３０を接続している。   The flat tubes 20 are arranged in parallel with a gap for air to pass through, and both ends thereof are connected to the pair of headers 30. For example, in the flat tube heat exchanger unit 10 shown in FIG. 2B, a plurality of flat tubes 20 extending in the left-right direction connect a pair of headers 30.

ヘッダ３０は、円筒形状を有しており、その内部には、ヘッダに接続される図示しない一方の接続管から流入する冷媒を複数の扁平管２０に分流させたり、複数の扁平管２０から流出する冷媒を合流させてヘッダに接続される図示しない他方の接続管に流出させるための冷媒流路（不図示）が形成されている。   The header 30 has a cylindrical shape, and the refrigerant flowing from one connection pipe (not shown) connected to the header is divided into the plurality of flat tubes 20 or flows out from the plurality of flat tubes 20. A refrigerant flow path (not shown) is formed for causing the refrigerants to join to flow out to the other connection pipe (not shown) connected to the header.

つまり、一方のヘッダ３０に流入した冷媒は、複数の扁平管２０に分流される。そして、扁平管２０に流入した冷媒は、内部の冷媒流路２１を流れて他方のヘッダ３０で合流する。このとき、扁平管２０においては、複数の扁平管２０を流れる冷媒と、各々の扁平管２０の間の隙間を通過する空気との間で熱交換が行われる。   That is, the refrigerant flowing into one header 30 is divided into a plurality of flat tubes 20. Then, the refrigerant flowing into the flat tube 20 flows through the internal refrigerant flow path 21 and joins at the other header 30. At this time, in the flat tube 20, heat exchange is performed between the refrigerant flowing through the plurality of flat tubes 20 and the air passing through the gaps between the flat tubes 20.

フィン４０は、平板形状（板状ともいう。）を有しており、空気が通過するための隙間を設けて平行に配置されている。例えば、図２の（ｂ）に示す扁平管熱交換器ユニット１０では、上下方向に沿う複数のフィン４０を左右方向に所定の隙間を設けて配置されている。   The fins 40 have a flat plate shape (also referred to as a plate shape), and are arranged in parallel with a gap for air to pass therethrough. For example, in the flat tube heat exchanger unit 10 shown in FIG. 2B, a plurality of fins 40 along the vertical direction are arranged with a predetermined gap in the horizontal direction.

図２の（ｄ）及び図３に示すように、フィン４０は、風上側の端部に扁平管２０を差し込むために一方向（ここでは風上側であるが、風の流れが逆の場合には風下側となる。）に開放する複数の切欠き部４１を有しており、これらの切欠き部４１に扁平管２０を差し込んだ状態でろう付けすることにより、フィン４０と扁平管２０とが一体的に接合される。   As shown in FIG. 2 (d) and FIG. 3, the fin 40 is in one direction (here, the windward side in order to insert the flat tube 20 into the end on the windward side, but the wind flow is reversed. Has a plurality of notches 41 that are open to the leeward side, and brazing in a state in which the flat tubes 20 are inserted into these notches 41, so that the fins 40 and the flat tubes 20 Are integrally joined.

図３に示すように、フィン４０の切欠き部４１の深さＬ３は、扁平管２０の空気流通方向の幅Ｌ４と実質的に同じ（Ｌ３≒Ｌ４）であり、フィン４０と扁平管２０とが一体的に接合された状態では、フィン４０の風上側端部位置と扁平管２０の風上側端部位置とが略一致する。   As shown in FIG. 3, the depth L3 of the notch 41 of the fin 40 is substantially the same as the width L4 of the flat tube 20 in the air flow direction (L3≈L4), and the fin 40 and the flat tube 20 Are integrally joined, the windward end position of the fin 40 and the windward end position of the flat tube 20 substantially coincide.

図３に示すように、フィン４０は、扁平管熱交換器ユニット１０の側面視において、その風上側端部４２がヘッダ３０の風上側外郭線３１よりも距離Ｌ１をもって風下側に位置し、かつ、その風下側端部４３がヘッダ３０の風下側外郭線３２よりも距離Ｌ２をもって風下側に位置するように形成される。換言すれば、ヘッダ３０は、フィン４０の切欠き部４１を有する端部よりも外側に一方の外郭線を有し、フィン４０の他方の端部よりも内側に他方の外郭線を有する。距離Ｌ２は、距離Ｌ１よりも大きくなるように設定されており、例えば、所定の距離αを距離Ｌ１に加えて距離Ｌ２とする。そして、所定の距離αは、扁平管熱交換器ユニット１０を空気流通方向に複数並べて配置する際に、上流側扁平管熱交換器ユニット１０（第１の扁平管熱交換器ユニット）のヘッダ３０と下流側扁平管熱交換器ユニット１０（第２の扁平管熱交換器ユニット）のヘッダ３０との間に確保される隙間の寸法にもとづいて設定することができ、例えば、双方のヘッダ３０同士が熱交換しない程度の距離（所定の距離）として、少なくとも一方のヘッダ３０の表面に生じた水滴が他方のヘッダ３０の表面とブリッジしない程度の距離に設定することができる。   As shown in FIG. 3, in the side view of the flat tube heat exchanger unit 10, the fin 40 has its windward side end portion 42 located on the leeward side with a distance L1 from the windward contour line 31 of the header 30, and The leeward side end 43 is formed to be located on the leeward side with a distance L2 from the leeward outline 32 of the header 30. In other words, the header 30 has one outline on the outside of the end of the fin 40 having the notch 41 and the other outline on the inside of the other end of the fin 40. The distance L2 is set to be larger than the distance L1, and, for example, a predetermined distance α is added to the distance L1 and is set as the distance L2. The predetermined distance α is equal to the header 30 of the upstream flat tube heat exchanger unit 10 (first flat tube heat exchanger unit) when a plurality of flat tube heat exchanger units 10 are arranged in the air flow direction. And the downstream flat tube heat exchanger unit 10 (second flat tube heat exchanger unit) header 30 can be set based on the size of the gap, for example, both headers 30 As a distance (predetermined distance) that does not exchange heat, water droplets generated on the surface of at least one header 30 can be set to a distance that does not bridge with the surface of the other header 30.

つぎに、上記のように構成された扁平管熱交換器ユニット１０を多列配置する場合の配置例について、図４及び図５を参照して説明する。   Next, an arrangement example in which the flat tube heat exchanger units 10 configured as described above are arranged in multiple rows will be described with reference to FIGS. 4 and 5.

図４は、本発明の実施形態に係る室内熱交換器における扁平管熱交換器ユニットの第１配置例を示す図であり、（ａ）は多列配置された扁平管熱交換器ユニットの平面図、（ｂ）は多列配置された扁平管熱交換器ユニットの切断線Ｘにおける断面図である。図４に示す室内熱交換器４Ａでは、同じ方向を向く２つの扁平管熱交換器ユニット１０を空気流通方向に並べて配置して構成されている。このとき、上流側扁平管熱交換器ユニット１０のフィン４０の風下側端部４３は、下流側扁平管熱交換器ユニット１０のフィン４０の風上側端部４２に近接又は接触する状態とする。   FIG. 4 is a view showing a first arrangement example of flat tube heat exchanger units in the indoor heat exchanger according to the embodiment of the present invention, and (a) is a plan view of the flat tube heat exchanger units arranged in multiple rows. FIG. 4B is a cross-sectional view taken along the cutting line X of the flat tube heat exchanger units arranged in multiple rows. In the indoor heat exchanger 4A shown in FIG. 4, two flat tube heat exchanger units 10 facing in the same direction are arranged side by side in the air flow direction. At this time, the leeward side end portion 43 of the fin 40 of the upstream flat tube heat exchanger unit 10 is in a state of being close to or in contact with the windward side end portion 42 of the fin 40 of the downstream flat tube heat exchanger unit 10.

このように２つの扁平管熱交換器ユニット１０を並べて配置して構成される室内熱交換器４Ａにおいては、上流側扁平管熱交換器ユニット１０のヘッダ３０と下流側扁平管熱交換器ユニット１０のヘッダ３０との間に所定の距離α（α＝Ｌ２−Ｌ１）の隙間を確保しつつ、上流側扁平管熱交換器ユニット１０と下流側扁平管熱交換器ユニット１０のフィン４０同士を接触又は近接状態で配置することができるだけでなく、図７（ｂ）に記載されている従来の扁平管熱交換器ユニット２００で発生していた隙間Ｓ４が生じることもない。そのため、ヘッダ３０同士の熱交換を防止するために、上流側扁平管熱交換器ユニット１０のヘッダ３０と下流側扁平管熱交換器ユニット１０のヘッダ３０との間に隙間を確保しても、この隙間から流入しようとする空気は、扁平管熱交換器ユニット１０の両側端に位置するフィン４０によって流入が阻止される。これにより、ユニット１０間の隙間から空気が流入することを抑制し、上流側扁平管熱交換器ユニット１０における通過空気量の減少を抑え熱交換効率を向上させることができる。さらに、フィン４０が風下側において上下方向に連通しているので、下流側扁平管熱交換器ユニット１０であっても、凝縮水の排水性を向上させることができる。特にこの点は、コルゲートフィンを用いた扁平管熱交換器に比べてより顕著な効果である。   In the indoor heat exchanger 4A configured by arranging the two flat tube heat exchanger units 10 side by side in this way, the header 30 of the upstream flat tube heat exchanger unit 10 and the downstream flat tube heat exchanger unit 10 are arranged. The fins 40 of the upstream flat tube heat exchanger unit 10 and the downstream flat tube heat exchanger unit 10 are brought into contact with each other while ensuring a gap of a predetermined distance α (α = L2−L1) with the header 30 of Or not only can it arrange | position in a close state, but the clearance gap S4 which generate | occur | produced in the conventional flat tube heat exchanger unit 200 described in FIG.7 (b) does not arise. Therefore, in order to prevent heat exchange between the headers 30, even if a gap is secured between the header 30 of the upstream flat tube heat exchanger unit 10 and the header 30 of the downstream flat tube heat exchanger unit 10, Inflow of air from this gap is blocked by fins 40 located at both ends of the flat tube heat exchanger unit 10. Thereby, it can suppress that air flows in from the clearance gap between the units 10, can suppress the reduction | decrease in the amount of passing air in the upstream flat tube heat exchanger unit 10, and can improve heat exchange efficiency. Furthermore, since the fins 40 communicate with each other in the vertical direction on the leeward side, the drainage of condensed water can be improved even in the downstream flat tube heat exchanger unit 10. In particular, this point is more remarkable than the flat tube heat exchanger using corrugated fins.

図５は、本発明の実施形態に係る室内熱交換器における扁平管熱交換器ユニットの第２配置例を示す図であり、（ａ）は多列配置された扁平管熱交換器ユニットの平面図、（ｂ）は多列配置された扁平管熱交換器ユニットの要部側面断面図である。図５に示す室内熱交換器４Ｂでは、２つの扁平管熱交換器ユニット１０を背中合わせの状態で空気流通方向に並べて配置して構成されている。このとき、上流側扁平管熱交換器ユニット１０のフィン４０の風下側端部４３は、下流側扁平管熱交換器ユニット１０のフィン４０の風上側端部４３（標準配置時の風下側端部）に近接又は接触する状態とする。   FIG. 5 is a view showing a second arrangement example of flat tube heat exchanger units in the indoor heat exchanger according to the embodiment of the present invention, and (a) is a plan view of the flat tube heat exchanger units arranged in multiple rows. FIG. 4B is a side sectional view of a main part of flat tube heat exchanger units arranged in multiple rows. The indoor heat exchanger 4B shown in FIG. 5 is configured by arranging two flat tube heat exchanger units 10 side by side in the air flow direction in a back-to-back state. At this time, the leeward side end 43 of the fin 40 of the upstream flat tube heat exchanger unit 10 corresponds to the windward side end 43 of the fin 40 of the downstream flat tube heat exchanger unit 10 (the leeward side end at the time of standard arrangement). ) In close proximity or contact.

このように２つの扁平管熱交換器ユニット１０を空気流通方向に並べて配置して構成される室内熱交換器４Ｂにおいても、上流側扁平管熱交換器ユニット１０のヘッダ３０と下流側扁平管熱交換器ユニット１０のヘッダ３０との間に隙間（Ｌ２＋Ｌ２）を確保しつつ、上流側扁平管熱交換器ユニット１０と下流側扁平管熱交換器ユニット１０のフィン４０同士を接触又は近接状態で配置してフィン全体の表面積を増加させることができるだけでなく、フィン４０同士の間に切欠き部４１による隙間が生じることを回避できる。   Thus, also in the indoor heat exchanger 4B configured by arranging the two flat tube heat exchanger units 10 side by side in the air flow direction, the header 30 and the downstream flat tube heat of the upstream flat tube heat exchanger unit 10 are arranged. The fins 40 of the upstream flat tube heat exchanger unit 10 and the downstream flat tube heat exchanger unit 10 are arranged in contact with each other or in close proximity while securing a gap (L2 + L2) between the header 30 of the exchanger unit 10. Thus, not only the surface area of the entire fin can be increased, but also the occurrence of a gap due to the notch 41 between the fins 40 can be avoided.

以上に述べた本発明の実施形態によれば、室内熱交換器４は、上下に配列され、内部に冷媒が流通する複数の扁平管２０と、扁平管２０に交差し空気を通過させるための隙間を設けて積層され、各扁平管２０の長さ方向と直交する方向から差し込むために一方向に開放する切欠き部４１を有する複数のフィン４０と、複数の扁平管２０の長さ方向の両端に取り付けられ内部で冷媒を分流・合流させる一対のヘッダ３０とを備えた扁平管熱交換器ユニット１０を少なくとも２つ以上有し、切欠き部４１が扁平管２０の断面長手方向の幅と同じ深さを有し、ヘッダ３０は、室内熱交換器４を扁平管２０の長さ方向から見たとき、フィン４０の切欠き部４１を有する一方の端部から外側のヘッダ３０の一方の外郭線までを距離Ｌ１とし、かつ、フィン４０の他方の端部から内側のヘッダ３０の他方の外郭線までを距離Ｌ２とするように形成され、距離Ｌ２が距離Ｌ１よりも大きいので、室内熱交換器４において扁平管熱交換器ユニット１０を多列配置する場合に、上流側扁平管熱交換器ユニット１０のヘッダ３０と下流側扁平管熱交換器ユニット１０のヘッダ３０との間に所定の隙間を確保してヘッダ３０同士間での熱交換を防ぎつつ、上流側扁平管熱交換器ユニット１０と下流側扁平管熱交換器ユニット１０のフィン４０同士を接触又は近接状態で配置してフィン全体の表面積を増加させることができるだけでなく、フィン４０同士の間に切欠き部４１による隙間が生じることも回避でき、その結果、ユニット１０間の隙間から空気が流入することを抑制し、上流側扁平管熱交換器ユニット１０における通過空気量の減少を抑え熱交換効率を向上させることができる。   According to the embodiment of the present invention described above, the indoor heat exchanger 4 is arranged vertically and has a plurality of flat tubes 20 in which refrigerant flows, and crosses the flat tubes 20 to allow air to pass therethrough. A plurality of fins 40 having cutout portions 41 that are stacked with gaps and open in one direction so as to be inserted from a direction orthogonal to the length direction of each flat tube 20, and in the length direction of the plurality of flat tubes 20 It has at least two or more flat tube heat exchanger units 10 provided with a pair of headers 30 attached to both ends and for internally dividing and merging the refrigerant, and the notch 41 has a width in the longitudinal direction of the cross section of the flat tube 20. The header 30 has the same depth, and when the indoor heat exchanger 4 is viewed from the length direction of the flat tube 20, one of the headers 30 on the outer side from the one end having the cutout portions 41 of the fins 40 is provided. The distance to the outline is L1, and the fi Since the distance L2 is formed from the other end of 40 to the other outline of the inner header 30, and the distance L2 is larger than the distance L1, the flat tube heat exchanger unit 10 in the indoor heat exchanger 4 is formed. Are arranged between the headers 30 by securing a predetermined gap between the header 30 of the upstream flat tube heat exchanger unit 10 and the header 30 of the downstream flat tube heat exchanger unit 10. While preventing heat exchange, not only can the fins 40 of the upstream flat tube heat exchanger unit 10 and the downstream flat tube heat exchanger unit 10 be placed in contact or in close proximity to increase the overall surface area of the fins. In addition, it is possible to avoid a gap due to the notch 41 between the fins 40, and as a result, it is possible to suppress the inflow of air from the gap between the units 10 and the upstream flat tube heat exchanger unit. It can be improved to suppress heat exchange efficiency decrease of the passing air amount DOO 10.

以上、本発明の好ましい実施形態について詳述したが、本発明は上述した実施形態に限定されるものではなく、特許請求の範囲に記載された本発明の要旨の範囲内において、種々の変形、変更が可能である。   The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments, and various modifications may be made within the scope of the gist of the present invention described in the claims. It can be changed.

例えば、上述の実施形態では、扁平管熱交換器ユニットを２列に配置した室内熱交換器を示したが、３以上の扁平管熱交換器ユニットを多列配置するようにしてもよい。また、本実施形態では室内熱交換器を例に示したが、室外熱交換器においても本発明は適用できる。さらに、本実施形態は風上側及び風下側を逆とした場合でも適用できる。   For example, in the above-described embodiment, an indoor heat exchanger in which flat tube heat exchanger units are arranged in two rows has been shown, but three or more flat tube heat exchanger units may be arranged in multiple rows. Moreover, although the indoor heat exchanger was shown as an example in the present embodiment, the present invention can also be applied to an outdoor heat exchanger. Furthermore, this embodiment can be applied even when the windward side and the leeward side are reversed.

１…空気調和機、２…室内機、３…室外機、４…室内熱交換器、５…室外熱交換器、６…圧縮機、７…膨張弁、８…四方弁、１０…扁平管熱交換器ユニット、２０…扁平管、２１…冷媒流路、３０…ヘッダ、４０…フィン、４１…切欠き部   DESCRIPTION OF SYMBOLS 1 ... Air conditioner, 2 ... Indoor unit, 3 ... Outdoor unit, 4 ... Indoor heat exchanger, 5 ... Outdoor heat exchanger, 6 ... Compressor, 7 ... Expansion valve, 8 ... Four-way valve, 10 ... Flat tube heat Exchange unit, 20 ... flat tube, 21 ... refrigerant flow path, 30 ... header, 40 ... fin, 41 ... notch

Claims (3)

上下に配列され、内部に冷媒が流通する複数の扁平管と、前記扁平管に交差し空気を通過させるための隙間を設けて積層され、各前記扁平管の長さ方向と直交する方向から差し込むために一方向に開放する切欠き部を有する複数のフィンと、前記複数の扁平管の長さ方向の両端に取り付けられ内部で冷媒を分流・合流させる一対のヘッダとを備えた扁平管熱交換器ユニットを少なくとも２つ以上有する熱交換器であって、
前記切欠き部が前記扁平管の断面長手方向の幅と同じ深さを有し、
前記ヘッダは、前記熱交換器を前記扁平管の長さ方向から見たとき、前記フィンの前記切欠き部を有する一方の端部から外側の前記ヘッダの一方の外郭線までを距離Ｌ１とし、かつ、前記フィンの他方の端部から内側の前記ヘッダの他方の外郭線までを距離Ｌ２とするように形成され、
前記距離Ｌ２が前記距離Ｌ１よりも大きいことを特徴とする熱交換器。 A plurality of flat tubes that are arranged vertically and in which refrigerant flows, and are stacked with gaps for crossing the flat tubes and allowing air to pass through, and are inserted from the direction perpendicular to the length direction of each flat tube For this purpose, a flat tube heat exchange comprising a plurality of fins having cutout portions opened in one direction and a pair of headers attached to both ends of the plurality of flat tubes in the length direction for diverting and joining the refrigerant therein A heat exchanger having at least two heat exchanger units,
The notch has the same depth as the width in the longitudinal direction of the cross section of the flat tube,
When the header is viewed from the length direction of the flat tube, the header has a distance L1 from one end portion having the notch portion of the fin to one outer line of the outer header, And it is formed so that the distance from the other end of the fin to the other outline of the inner header is a distance L2.
The heat exchanger according to claim 1, wherein the distance L2 is larger than the distance L1. 前記距離Ｌ２と前記距離Ｌ１との差α（＝Ｌ２−Ｌ１）は、所定の距離に設定されていることを特徴とする請求項１に記載の熱交換器。   The heat exchanger according to claim 1, wherein a difference α (= L2−L1) between the distance L2 and the distance L1 is set to a predetermined distance. 前記少なくとも２つの扁平管熱交換器ユニットが第１の扁平管熱交換器ユニットと第２の扁平管熱交換器ユニットとを含み、前記第１の扁平管熱交換器ユニットのフィンの風下側端部が前記第２の扁平管熱交換器ユニットのフィンの風上側端部に近接又は接触する状態で並べて配置されたことを特徴とする請求項１又は２に記載の熱交換器。   The at least two flat tube heat exchanger units include a first flat tube heat exchanger unit and a second flat tube heat exchanger unit, and the leeward side ends of the fins of the first flat tube heat exchanger unit The heat exchanger according to claim 1 or 2, wherein the portions are arranged side by side in a state of being close to or in contact with the windward end of the fin of the second flat tube heat exchanger unit.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019198174A1 (en) * 2018-04-11 2019-10-17 三菱電機株式会社 Air conditioning device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002318087A (en) * 2001-02-07 2002-10-31 Modine Mfg Co Heat exchanger
JP2003287390A (en) * 2002-03-27 2003-10-10 Mitsubishi Electric Corp Heat exchanger and air conditioner using this heat exchanger
JP2010038439A (en) * 2008-08-05 2010-02-18 Sharp Corp Heat exchanger
JP2010139166A (en) * 2008-12-11 2010-06-24 Mitsubishi Electric Corp Air conditioner
JP2010249343A (en) * 2009-04-13 2010-11-04 Mitsubishi Electric Corp Fin tube type heat exchanger and air conditioner using the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002318087A (en) * 2001-02-07 2002-10-31 Modine Mfg Co Heat exchanger
JP2003287390A (en) * 2002-03-27 2003-10-10 Mitsubishi Electric Corp Heat exchanger and air conditioner using this heat exchanger
JP2010038439A (en) * 2008-08-05 2010-02-18 Sharp Corp Heat exchanger
JP2010139166A (en) * 2008-12-11 2010-06-24 Mitsubishi Electric Corp Air conditioner
JP2010249343A (en) * 2009-04-13 2010-11-04 Mitsubishi Electric Corp Fin tube type heat exchanger and air conditioner using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019198174A1 (en) * 2018-04-11 2019-10-17 三菱電機株式会社 Air conditioning device
JPWO2019198174A1 (en) * 2018-04-11 2021-02-12 三菱電機株式会社 Air conditioner
EP3779318A4 (en) * 2018-04-11 2021-03-31 Mitsubishi Electric Corporation Air conditioning device

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