JPWO2013084397A1 - Air conditioner - Google Patents

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JPWO2013084397A1
JPWO2013084397A1 JP2013548060A JP2013548060A JPWO2013084397A1 JP WO2013084397 A1 JPWO2013084397 A1 JP WO2013084397A1 JP 2013548060 A JP2013548060 A JP 2013548060A JP 2013548060 A JP2013548060 A JP 2013548060A JP WO2013084397 A1 JPWO2013084397 A1 JP WO2013084397A1
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Prior art keywords
heat exchanger
outdoor
air
rows
air conditioner
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明広 重田
明広 重田
横山　昭一
昭一 横山
富之 野間
富之 野間
憲昭 山本
憲昭 山本
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Priority to JP2013548060A priority Critical patent/JPWO2013084397A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/14—Heat exchangers specially adapted for separate outdoor units
    • F24F1/16—Arrangement or mounting thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • F28D1/0435—Combination of units extending one behind the other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/14—Fastening; Joining by using form fitting connection, e.g. with tongue and groove

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Geometry (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

室外熱交換器５は、３列以上で、主熱交換器８と副熱交換器９からなり、主熱交換器８と副熱交換器９の一端は、別々の端板１０ａ、１０ｂで構成されることにより、組立等で室外熱交換器５を３列一体で保持することがなくなるので、端板に繋がれていない一端で、３列の中間となる熱交換器列のフィン２０が、両側の熱交換器列に圧迫されてフィン２０が倒れることを防止し、送風性能を向上することができる。The outdoor heat exchanger 5 is composed of three or more rows, and includes a main heat exchanger 8 and a sub heat exchanger 9, and one end of the main heat exchanger 8 and the sub heat exchanger 9 is composed of separate end plates 10a and 10b. By doing so, it is no longer necessary to hold the outdoor heat exchanger 5 in one row by assembly or the like, so that the fin 20 of the heat exchanger row that is the middle of the three rows at one end not connected to the end plate, It is possible to prevent the fins 20 from falling due to being pressed by the heat exchanger rows on both sides, and to improve the blowing performance.

Description

本発明は、空気調和機または冷凍機分野に広く用いられる熱交換器に関する。   The present invention relates to a heat exchanger widely used in the field of air conditioners or refrigerators.

従来、この種の熱交換器には、近年の省エネ法規制等による高効率の追求に応じた伝熱面積の拡大のために３列を一体としているものがある（例えば、特許文献１参照。）。   Conventionally, in this type of heat exchanger, there is one in which three rows are integrated in order to expand the heat transfer area in accordance with the pursuit of high efficiency due to recent energy saving laws and regulations (see, for example, Patent Document 1). ).

図５は、従来の空気調和機の室外機に搭載の熱交換器の概略斜視図である。この熱交換器は、一定間隔で平行に複数並べられ、その間を空気３１が流動するフィン２０と、フィン２０に所定の段ピッチおよび列ピッチで略直角に挿入され、内部を冷媒が流動する伝熱管２１から１つの熱交換器列を構成している。そして、その熱交換器列の一端が端板３０によって繋がれることによって、３列が一体となった熱交換器が形成されている。   FIG. 5 is a schematic perspective view of a heat exchanger mounted on an outdoor unit of a conventional air conditioner. A plurality of heat exchangers are arranged in parallel at regular intervals, and fins 20 in which air 31 flows are inserted between them, and are inserted into fins 20 at a predetermined step pitch and row pitch at a substantially right angle so that the refrigerant flows inside. The heat pipe 21 constitutes one heat exchanger row. Then, one end of the heat exchanger row is connected by the end plate 30 to form a heat exchanger in which the three rows are integrated.

特開平１１−２６４６８９号公報JP-A-11-264689

図６は、図５におけるＢ方向から見た従来の室外熱交換器の概略上面図である。図６に示すように、特許文献１に記載の熱交換器においては、組立等で熱交換器を保持する場合に、端板に繋がれていない一端で、３列の中間となる熱交換器列のフィンが、両側の熱交換器列に圧迫されて、フィンが倒れてしまい、送風性能が低下するという課題を有していた。   FIG. 6 is a schematic top view of a conventional outdoor heat exchanger viewed from the direction B in FIG. As shown in FIG. 6, in the heat exchanger described in Patent Document 1, when the heat exchanger is held by assembling or the like, the heat exchanger becomes an intermediate between three rows at one end not connected to the end plate. The fins in the row were pressed by the heat exchanger rows on both sides, and the fins collapsed, resulting in a problem that the air blowing performance deteriorated.

本発明は、前記従来の課題を解決するもので、組立等で熱交換器を保持する場合に、端板に繋がれていない一端で、３列の中間となる熱交換器列のフィンが、両側の熱交換器列に圧迫されてフィンが倒れることを防止し、送風性能を向上する空気調和機を提供することを目的とする。   The present invention solves the above-mentioned conventional problem, and when holding the heat exchanger in assembly or the like, the fins of the heat exchanger row that is the middle of the three rows at one end not connected to the end plate, An object of the present invention is to provide an air conditioner that prevents the fins from falling down by being pressed by the heat exchanger rows on both sides and improves the air blowing performance.

前記従来の課題を解決するために、本発明の空気調和機は、圧縮機、室内熱交換器、膨張手段、室外熱交換器を冷媒回路で連結した冷凍サイクルと、室外熱交換器に空気を搬送する室外送風ファンと、を備え、前記室外熱交換器は、主熱交換器と副熱交換器を３列以上含む複数の熱交換器列からなるフィンチューブ型熱交換器であって、前記主熱交換器と前記副熱交換器は、複数並べられ、その間を、前記室外送風ファンの回転に伴って発生する空気が流動するフィンと、前記フィンに所定の段ピッチおよび列ピッチで略直角に挿入され、内部を冷媒が流動する複数の伝熱管と、からなり、前記主熱交換器と前記副熱交換器の一端は、別々の端板で構成されるとしたものである。   In order to solve the above-described conventional problems, an air conditioner of the present invention includes a refrigeration cycle in which a compressor, an indoor heat exchanger, expansion means, and an outdoor heat exchanger are connected by a refrigerant circuit, and air is supplied to the outdoor heat exchanger. An outdoor fan for conveying, and the outdoor heat exchanger is a finned tube heat exchanger composed of a plurality of heat exchanger rows including three or more rows of main heat exchangers and sub heat exchangers, A plurality of main heat exchangers and sub heat exchangers are arranged, and between them are fins through which air generated by the rotation of the outdoor blower fan flows, and substantially perpendicular to the fins at a predetermined step pitch and row pitch. A plurality of heat transfer tubes through which refrigerant flows, and one end of each of the main heat exchanger and the sub heat exchanger is constituted by separate end plates.

これによって、組立等で熱交換器を保持する場合に、端板に繋がれていない一端で、３列の中間となる熱交換器列のフィンが、両側の熱交換器列に圧迫されてフィンが倒れることを防止する。   As a result, when the heat exchanger is held by assembly or the like, the fins of the heat exchanger row that is the middle of the three rows are pressed by the heat exchanger rows on both sides at one end that is not connected to the end plate. To prevent falling.

本発明の空気調和機は、組立等で熱交換器を保持する場合に、端板に繋がれていない一端で、３列の中間となる熱交換器列のフィンが、両側の熱交換器列に圧迫されてフィンが倒れることを防止し、送風性能を向上することができる。   In the air conditioner of the present invention, when the heat exchanger is held by assembly or the like, the fins of the heat exchanger row that is the middle of the three rows at one end not connected to the end plate are arranged on both sides of the heat exchanger row. It is possible to prevent the fins from falling down due to the pressure and to improve the blowing performance.

本発明の実施の形態１における空気調和機の構成図The block diagram of the air conditioner in Embodiment 1 of this invention 本発明の実施の形態１における室外熱交換器の構成図The block diagram of the outdoor heat exchanger in Embodiment 1 of this invention （ａ）本発明の実施の形態１における室外熱交換器の主熱交換器の端板と副熱交換器の端板を繋げる前の状態を示す斜視図、（ｂ）端板と端板を繋げた後の状態を示す斜視図(A) The perspective view which shows the state before connecting the end plate of the main heat exchanger of the outdoor heat exchanger in Embodiment 1 of this invention, and the end plate of a subheat exchanger, (b) An end plate and an end plate are shown. The perspective view which shows the state after connecting （ａ）切起こしを設けた場合における図２のＡ−Ａ’方向から見た断面図、（ｂ）本発明の実施の形態１における室外熱交換器の風下側のフィン面上の切起こしを示す図(A) Sectional view seen from the AA ′ direction in FIG. 2 when a cut-and-raise is provided, (b) Cut-and-raise on the fin surface on the lee side of the outdoor heat exchanger in the first embodiment of the present invention. Illustration 従来の空気調和機の室外熱交換器の構成を示す概略斜視図The schematic perspective view which shows the structure of the outdoor heat exchanger of the conventional air conditioner 図５におけるＢ方向から見た従来の室外熱交換器の概略上面図Schematic top view of a conventional outdoor heat exchanger viewed from direction B in FIG.

第１の発明は、圧縮機、室内熱交換器、膨張手段、室外熱交換器を冷媒回路で連結した冷凍サイクルと、前記室外熱交換器に空気を搬送する室外送風ファンと、を備え、前記室外熱交換器は、主熱交換器と副熱交換器を３列以上含む複数の熱交換器列からなるフィンチューブ型熱交換器であって、前記主熱交換器と前記副熱交換器は、複数並べられ、その間を、前記室外送風ファンの回転に伴って発生する空気が流動するフィンと、前記フィンに所定の段ピッチおよび列ピッチで略直角に挿入され、内部を冷媒が流動する複数の伝熱管と、からなり、前記主熱交換器と前記副熱交換器の一端は、別々の端板で別々の端板で構成される。
この構成により、組立等で熱交換器を保持する場合に、端板に繋がれていない一端で、３列の中間となる熱交換器列のフィンが、両側の熱交換器列に圧迫されてフィンが倒れることを防止し、送風性能を向上することができる。The first invention includes a refrigeration cycle in which a compressor, an indoor heat exchanger, an expansion means, and an outdoor heat exchanger are connected by a refrigerant circuit, and an outdoor fan that conveys air to the outdoor heat exchanger, The outdoor heat exchanger is a finned tube heat exchanger including a plurality of heat exchanger rows including three or more rows of main heat exchangers and sub heat exchangers, wherein the main heat exchanger and the sub heat exchanger are And a plurality of fins through which air generated by the rotation of the outdoor blower fan flows, and a plurality of refrigerants that are inserted into the fins at a predetermined step pitch and row pitch at a substantially right angle and in which the refrigerant flows. The one end of the main heat exchanger and the sub heat exchanger is composed of separate end plates and separate end plates.
With this configuration, when holding the heat exchanger in assembly or the like, the fins of the heat exchanger row that is the middle of the three rows are pressed by the heat exchanger rows on both sides at one end not connected to the end plate. It is possible to prevent the fins from falling and improve the blowing performance.

第２の発明は、特に、第１の発明において、前記室外熱交換器の少なくとも一端は、略Ｌ字状に折曲して形成される。
この構成により、室外熱交換器のコンパクト化をすることができる。In a second aspect of the invention, in particular, in the first aspect of the invention, at least one end of the outdoor heat exchanger is formed by being bent into a substantially L shape.
With this configuration, the outdoor heat exchanger can be made compact.

第３の発明は、特に、第１または第２の発明において、前記副熱交換器は、前記室外送風ファンの回転に伴って発生する空気の流動に対して風上側に配設するとともに、前記副熱交換器の前記伝熱管の外径は、前記主熱交換器の前記伝熱管の外径よりも細くなっている。
この構成により、熱交換器列を３列以上の複数列としたことによる通風抵抗を低減し、さらに送風性能を向上することができる。According to a third aspect of the invention, in particular, in the first or second aspect of the invention, the auxiliary heat exchanger is disposed on the windward side with respect to the flow of air generated with the rotation of the outdoor blower fan. The outer diameter of the heat transfer tube of the auxiliary heat exchanger is thinner than the outer diameter of the heat transfer tube of the main heat exchanger.
With this configuration, it is possible to reduce the ventilation resistance due to the heat exchanger row having a plurality of rows of three or more, and to further improve the blowing performance.

第４の発明は、特に、第１乃至３のいずれかの発明において、前記室外熱交換器は、前記室外送風ファンの回転に伴って発生する空気の流動に対して風下側の前記フィンの面上に、前記空気の流動に対向して開口した切起こしを設けている。
この構成により、フィンの面上での風上側から風下側までの連続的な温度境界層の発達による、風下側での熱伝達率の低下を防止し、熱交換器の効率を向上することができる。According to a fourth aspect of the present invention, in particular, in any one of the first to third aspects, the outdoor heat exchanger is configured such that the surface of the fin on the leeward side with respect to the flow of air generated as the outdoor blower fan rotates. A cut-and-raised opening is provided above the air flow.
With this configuration, it is possible to prevent a decrease in heat transfer coefficient on the leeward side due to the development of a continuous temperature boundary layer from the leeward side to the leeward side on the surface of the fin, and to improve the efficiency of the heat exchanger. it can.

以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

（実施の形態１）
図１は、本発明の実施の形態１における空気調和機の構成図である。
本発明の実施の形態１における空気調和機は、圧縮機１、四方弁２、室内熱交換器３、本発明の膨張手段としての膨張弁４、室外熱交換器５を備え、それらを環状に接続し、冷凍サイクルを構成している。また、室内熱交換器３および室外熱交換器５には、空気を搬送する室内送風ファン６および室外送風ファン７が設けられている。(Embodiment 1)
FIG. 1 is a configuration diagram of an air conditioner according to Embodiment 1 of the present invention.
The air conditioner in Embodiment 1 of this invention is equipped with the compressor 1, the four-way valve 2, the indoor heat exchanger 3, the expansion valve 4 as an expansion means of this invention, and the outdoor heat exchanger 5, and makes them cyclic | annular. Connected to form a refrigeration cycle. The indoor heat exchanger 3 and the outdoor heat exchanger 5 are provided with an indoor air fan 6 and an outdoor air fan 7 that convey air.

図２は、本発明の実施の形態１における室外熱交換器の構成図である。
図２に示すように、室外熱交換器５は、一定間隔で平行に複数並べられ、その間を、室外送風ファン７の回転に伴って発生する空気３１が流動するフィン２０と、フィン２０に所定の段ピッチおよび列ピッチで略直角に挿入され、内部を冷媒が流動する複数の伝熱管２１ａ、２１ｂからなる複数の熱交換器列を有する。本発明の実施の形態１において、この熱交換器列は、２列の主熱交換器８と１列の副熱交換器９で構成され、その一端に設置された別々の端板１０ａ、１０ｂを繋げることで、３列一体として形成している。そして、もう一端は、室外熱交換器５のコンパクト化を図るために、略Ｌ字状に折曲されている。
以上のように構成された空気調和機について、以下にその動作および作用を説明する。FIG. 2 is a configuration diagram of the outdoor heat exchanger according to Embodiment 1 of the present invention.
As shown in FIG. 2, a plurality of outdoor heat exchangers 5 are arranged in parallel at regular intervals, and a predetermined interval is provided between the fins 20 and the fins 20 through which air 31 generated by the rotation of the outdoor fan 7 flows. And a plurality of heat exchanger rows made up of a plurality of heat transfer tubes 21a and 21b through which the refrigerant flows. In Embodiment 1 of the present invention, this heat exchanger row is composed of two rows of main heat exchangers 8 and one row of auxiliary heat exchangers 9, and separate end plates 10a, 10b installed at one end thereof. Are connected to form a three-row unit. The other end is bent in a substantially L shape in order to make the outdoor heat exchanger 5 compact.
About the air conditioner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

基本的な動作としては、冷房運転時は、圧縮機１から圧縮された高温高圧の冷媒が吐出され、四方弁２を介して室外熱交換器５に流入する。この室外熱交換器５では、その風路に設けられた室外送風ファン７により搬送される室外の空気が室外熱交換器５のフィン２０と伝熱管２１ａ、２１ｂの間を通過しながら冷却されて高圧の液状態となる（室外熱交換器５は凝縮器として作用する）。   As a basic operation, during the cooling operation, the high-temperature and high-pressure refrigerant compressed from the compressor 1 is discharged and flows into the outdoor heat exchanger 5 through the four-way valve 2. In this outdoor heat exchanger 5, the outdoor air conveyed by the outdoor air blowing fan 7 provided in the air passage is cooled while passing between the fins 20 of the outdoor heat exchanger 5 and the heat transfer tubes 21a and 21b. It becomes a high-pressure liquid state (the outdoor heat exchanger 5 acts as a condenser).

その後、膨張弁４で減圧され低圧の二相冷媒となり、室内熱交換器３に流入する。この室内熱交換器３では、その風路に設けられた室内送風ファン６により搬送される室内の空気と熱交換することにより、室内空間に吹出される空気は冷やされ、冷媒は空気から受け取った熱で蒸発して気体状態となる（室内熱交換器３は蒸発器として作用する）。そして、冷媒は、圧縮機１に戻るという循環を繰り返し、室内空間を空気調和する。また、暖房運転の場合は、冷凍サイクルにおいて上記と逆向きの冷媒の流れとなり、室内熱交換器３が凝縮器として、室外熱交換器５が蒸発器として作用する。なお、冷凍サイクルで用いる冷媒は、環境負荷の少ない、例えば、Ｒ４１０Ａ、プロパン、プロピレン、二酸化炭素などの冷媒が適しているが、特にこれらに限定されるものではない。   Thereafter, the pressure is reduced by the expansion valve 4 to form a low-pressure two-phase refrigerant and flows into the indoor heat exchanger 3. In this indoor heat exchanger 3, the air blown into the indoor space is cooled by exchanging heat with the indoor air conveyed by the indoor blower fan 6 provided in the air passage, and the refrigerant is received from the air. It evaporates with heat and becomes a gaseous state (the indoor heat exchanger 3 acts as an evaporator). And a refrigerant | coolant repeats the circulation of returning to the compressor 1, and air-conditions indoor space. In the heating operation, the refrigerant flows in the opposite direction in the refrigeration cycle, and the indoor heat exchanger 3 functions as a condenser and the outdoor heat exchanger 5 functions as an evaporator. The refrigerant used in the refrigeration cycle is preferably a refrigerant having a low environmental load, such as R410A, propane, propylene, carbon dioxide, but is not particularly limited thereto.

次に、室外熱交換器５について詳説する。図２に示したように、まず主熱交換器８を室外送風ファン７から搬送される空気の流れ３１に対して風下側に設置する。そして、副熱交換器９を室外送風ファン７から搬送される空気の流れ３１に対して風上側に設置する。その後に主熱交換器８と副熱交換器９の一端に設置された端板１０ａ、１０ｂを繋げる。組立等で室外熱交換器５を３列一体で保持することがなくなるので、端板に繋がれていない一端で、３列の中間となる熱交換器列のフィン２０が、両側の熱交換器列に圧迫されてフィン２０が倒れることを防止できる。   Next, the outdoor heat exchanger 5 will be described in detail. As shown in FIG. 2, first, the main heat exchanger 8 is installed on the leeward side with respect to the air flow 31 conveyed from the outdoor blower fan 7. Then, the auxiliary heat exchanger 9 is installed on the windward side with respect to the air flow 31 conveyed from the outdoor blower fan 7. Thereafter, end plates 10a and 10b installed at one end of the main heat exchanger 8 and the sub heat exchanger 9 are connected. Since it is no longer necessary to hold the outdoor heat exchangers 5 in one row during assembly or the like, the fins 20 in the middle of the three rows of heat exchanger rows at one end not connected to the end plate It is possible to prevent the fins 20 from falling due to being pressed by the row.

図３は、本発明の実施の形態１における室外熱交換器の端板の構成図である。特に、図３（ａ）は、室外熱交換器における主熱交換器８の端板１０ａと副熱交換器９の端板１０ｂを繋げる前の状態を示す斜視図である。図３（ｂ）は、端板１０ａと端板１０ｂを繋げた後の状態を示す斜視図である。
図３（ａ）に示すように、本発明の実施の形態１における室外熱交換器５の端板は、別々の端板１０ａ、１０ｂから構成される。端板１０ａには開口部１４ａ、１４ｂ、１４ｃが備えられており、端板１０ｂにはツメ１１ａ、１１ｂ、１１ｃが備えられている。本発明の実施の形態１における空気調和機では、端板１０ａと端板１０ｂを繋げるとき、図３（ｂ）に示すように、端板１０ａの開口部１４ａ、１４ｂ、１４ｃにツメ１１ａ、１１ｂ、１１ｃが入るように、端板１０ａと端板１０ｂの一部を重ね合わせる。そして、ビス１２ａ、１２ｂで端板１０ａと端板１０ｂを固定する。このように、端板１０ａ、１０ｂの一部を重ね合わせて、ツメ１１ａ、１１ｂ、１１ｃとビス１２ａ、１２ｂで固定することで、一体の端板のように、ずれのない強固な固定をすることができる。FIG. 3 is a configuration diagram of an end plate of the outdoor heat exchanger according to Embodiment 1 of the present invention. In particular, FIG. 3A is a perspective view showing a state before connecting the end plate 10a of the main heat exchanger 8 and the end plate 10b of the sub heat exchanger 9 in the outdoor heat exchanger. FIG.3 (b) is a perspective view which shows the state after connecting the end plate 10a and the end plate 10b.
As shown to Fig.3 (a), the end plate of the outdoor heat exchanger 5 in Embodiment 1 of this invention is comprised from separate end plate 10a, 10b. The end plate 10a is provided with openings 14a, 14b, 14c, and the end plate 10b is provided with claws 11a, 11b, 11c. In the air conditioner according to Embodiment 1 of the present invention, when connecting the end plate 10a and the end plate 10b, as shown in FIG. 3 (b), the openings 14a, 14b, and 14c of the end plate 10a have claws 11a and 11b. , 11c, part of the end plate 10a and the end plate 10b are overlapped. And the end plate 10a and the end plate 10b are fixed with screws 12a and 12b. In this way, a part of the end plates 10a, 10b is overlapped and fixed with the claws 11a, 11b, 11c and the screws 12a, 12b, thereby fixing firmly without deviation as an integrated end plate. be able to.

以上のように、本発明の実施の形態１においては、室外熱交換器５は、３列以上で、主熱交換器８と副熱交換器９から構成される。また、主熱交換器８と副熱交換器９の一端は、別々の端板１０ａ、１０ｂをから構成される。この構成により、組立等で室外熱交換器５を３列一体で保持することがなくなる。したがって、端板に繋がれていない一端では、３列の中間となる熱交換器列のフィン２０が、両側の熱交換器列に圧迫されてフィン２０が倒れることを防止し、送風性能を向上することができる。   As described above, in Embodiment 1 of the present invention, the outdoor heat exchangers 5 are composed of the main heat exchanger 8 and the sub heat exchanger 9 in three or more rows. Moreover, the end of the main heat exchanger 8 and the sub heat exchanger 9 is comprised from the separate end plates 10a and 10b. With this configuration, the outdoor heat exchangers 5 are not held in three rows integrally during assembly or the like. Therefore, at one end not connected to the end plate, the fins 20 of the heat exchanger row that is the middle of the three rows are prevented from being pressed by the heat exchanger rows on both sides to cause the fins 20 to fall and improve the blowing performance. can do.

また、本発明の実施の形態１における空気調和機では、室外熱交換器５の副熱交換器９の伝熱管２１ｂの外径を、主熱交換器８の伝熱管２１ａの外径よりも細くすることにより、さらに送風性能を向上することができる。   Moreover, in the air conditioner in Embodiment 1 of this invention, the outer diameter of the heat exchanger tube 21b of the subheat exchanger 9 of the outdoor heat exchanger 5 is made thinner than the outer diameter of the heat exchanger tube 21a of the main heat exchanger 8. By doing, ventilation performance can be improved further.

３列以上の複数の熱交換器列を含む室外熱交換器５では、これらの複数の熱交換器列を配置することにより通風抵抗が増大し、送風性能を向上させることが難しくなる。本発明の実施の形態１における空気調和機では、室外熱交換器５の副熱交換器９の伝熱管２１ｂの外径を、主熱交換器８の伝熱管２１ａの外径よりも細くしている。これによって、熱交換器列を３列以上の複数列としたことによる通風抵抗を低減し、さらに送風性能を向上することができる。   In the outdoor heat exchanger 5 including a plurality of heat exchanger rows of three or more rows, the ventilation resistance is increased by arranging these heat exchanger rows, and it is difficult to improve the blowing performance. In the air conditioner according to Embodiment 1 of the present invention, the outer diameter of the heat transfer tube 21b of the sub heat exchanger 9 of the outdoor heat exchanger 5 is made smaller than the outer diameter of the heat transfer tube 21a of the main heat exchanger 8. Yes. As a result, it is possible to reduce the ventilation resistance due to the heat exchanger row having a plurality of rows of three or more, and to further improve the blowing performance.

図４は、本発明の実施の形態１における室外熱交換器の風下側のフィン面上に切起こしを設けた場合の構成図である。図４（ａ）は、切起こしを設けた場合における図２のＡ−Ａ’方向から見た断面図である。図４（ｂ）は、室外熱交換器の風下側のフィン面上の切起こしを示す図である。
本発明の実施の形態１における室外熱交換器５の室外送風ファン７の回転に伴って発生する空気３１の流動に対して風下側のフィン２０の面上に、図４（ａ）及び図４（ｂ）に示すように、空気の流れ３１に対向して開口した切起こし１３を設けている。本発明の実施の形態１における空気調和機では、この切起こし１３によって、風下側での熱伝達率の低下を防止し、室外熱交換器５の効率を向上している。FIG. 4 is a configuration diagram in the case where a cut-and-raised portion is provided on the leeward fin surface of the outdoor heat exchanger according to Embodiment 1 of the present invention. Fig.4 (a) is sectional drawing seen from the AA 'direction of FIG. 2 in the case of providing a cut and raised. FIG.4 (b) is a figure which shows the raising on the fin surface of the leeward side of an outdoor heat exchanger.
4 (a) and 4 on the surface of the fin 20 on the leeward side with respect to the flow of the air 31 generated with the rotation of the outdoor blower fan 7 of the outdoor heat exchanger 5 in the first embodiment of the present invention. As shown in (b), a cut-and-raised portion 13 that is open to face the air flow 31 is provided. In the air conditioner according to Embodiment 1 of the present invention, the cut and raised portion 13 prevents a decrease in heat transfer coefficient on the leeward side and improves the efficiency of the outdoor heat exchanger 5.

圧縮機１から圧縮された高温高圧の冷媒は、四方弁２を介して室外熱交換器５に流れ、主熱交換器８と副熱交換器９の伝熱管２１ａ、２１ｂを流れる。伝熱管２１ａ、２１ｂは、複数列のフィン２０と繋がっており、室外送風ファン７により発生する空気の流れ３１が、伝熱管２１ａ、２１ｂの周囲とフィン２０間を通過する。このとき、フィン２０間を通過する空気は、相互に混合されずに、フィン２０に挟まれた各スペースを独立に通過して熱交換を行う。そのため、フィン２０の表面に沿って温度境界層が形成され、特に、風上側から風下側に向かって温度境界層が発達する。この温度境界層が発達することによって、風下側での熱伝達率が低下する。   The high-temperature and high-pressure refrigerant compressed from the compressor 1 flows to the outdoor heat exchanger 5 through the four-way valve 2 and flows through the heat transfer tubes 21 a and 21 b of the main heat exchanger 8 and the auxiliary heat exchanger 9. The heat transfer tubes 21 a and 21 b are connected to the plurality of rows of fins 20, and the air flow 31 generated by the outdoor blower fan 7 passes between the heat transfer tubes 21 a and 21 b and between the fins 20. At this time, the air passing between the fins 20 passes through each space sandwiched between the fins 20 without being mixed with each other and performs heat exchange. Therefore, a temperature boundary layer is formed along the surface of the fin 20, and in particular, the temperature boundary layer develops from the windward side toward the leeward side. The development of this temperature boundary layer reduces the heat transfer coefficient on the leeward side.

本実施の形態１における空気調和機では、室外熱交換器５の室外送風ファン７の回転に伴って発生する空気３１の流動に対して風下側のフィン２０の面上に、空気の流れ３１に対向して開口した切起こし１３を設けている。この切起こし１３によって、フィン２０の面上に沿って発達してきた温度境界層を寸断できる。また、フィン２０間を流れる空気３１が切起こし１３に衝突したり、フィン裏面の空気と混合されることによって乱流化を促進し、温度境界層の発達を抑制できる。したがって、本実施の形態１における空気調和機では、室外熱交換器５の室外送風ファン７の回転に伴って発生する空気３１の流動に対して風下側のフィン２０の面上に、空気の流れ３１に対向して開口した切起こし１３を設けることによって、フィンの面上での風上側から風下側までの連続的な温度境界層の発達による、風下側での熱伝達率の低下を防止し、室外熱交換器５の効率を向上することができる。   In the air conditioner according to the first embodiment, the air flow 31 on the surface of the fin 20 on the leeward side with respect to the flow of the air 31 generated as the outdoor blower fan 7 of the outdoor heat exchanger 5 rotates. A cut-and-raised 13 that opens oppositely is provided. By this cut and raised 13, the temperature boundary layer developed along the surface of the fin 20 can be cut off. Further, the air 31 flowing between the fins 20 is cut up and collides with the air 13 or mixed with the air on the back surface of the fins, thereby promoting turbulence and suppressing the development of the temperature boundary layer. Therefore, in the air conditioner according to the first embodiment, air flows on the surface of the fin 20 on the leeward side with respect to the flow of the air 31 generated with the rotation of the outdoor fan 7 of the outdoor heat exchanger 5. By providing the cut-and-raised 13 that is open to face 31, it is possible to prevent a decrease in heat transfer coefficient on the leeward side due to the development of a continuous temperature boundary layer from the leeward side to the leeward side on the fin surface. The efficiency of the outdoor heat exchanger 5 can be improved.

以上のように、本発明に係る空気調和機は、流動する空気と高い熱交換性能を有するので、高効率な熱交換が必要な産業用・家庭用の空調機器等の用途にも適用できる。   As described above, since the air conditioner according to the present invention has high heat exchange performance with flowing air, it can be applied to industrial and household air conditioners that require high efficiency heat exchange.

１ 圧縮機
２ 四方弁
３ 室内熱交換器
４ 膨張弁（膨張手段）
５ 室外熱交換器
６ 室内送風ファン
７ 室外送風ファン
８ 主熱交換器
９ 副熱交換器
１０ａ （主熱交換器の）端板
１０ｂ （副熱交換器の）端板
１１ａ、１１ｂ、１１ｃ ツメ
１２ａ、１２ｂ ビス
１３ 切起こし
１４ａ、１４ｂ、１４ｃ 開口部
２０ フィン
２１ 伝熱管
２１ａ （主熱交換器の）伝熱管
２１ｂ （副熱交換器の）伝熱管
３１ 空気の流れDESCRIPTION OF SYMBOLS 1 Compressor 2 Four-way valve 3 Indoor heat exchanger 4 Expansion valve (expansion means)
5 Outdoor Heat Exchanger 6 Indoor Blower Fan 7 Outdoor Blower Fan 8 Main Heat Exchanger 9 Sub Heat Exchanger 10a (Main Heat Exchanger) End Plate 10b (Sub Heat Exchanger) End Plate 11a, 11b, 11c Claw 12a , 12b Screw 13 Cut and raised 14a, 14b, 14c Opening 20 Fin 21 Heat transfer tube 21a Heat transfer tube (for main heat exchanger) 21b Heat transfer tube (for sub heat exchanger) 31 Air flow

Claims (4)

圧縮機、室内熱交換器、膨張手段、室外熱交換器を冷媒回路で連結した冷凍サイクルと、
前記室外熱交換器に空気を搬送する室外送風ファンと、
を備え、
前記室外熱交換器は、主熱交換器と副熱交換器を３列以上含む複数の熱交換器列からなるフィンチューブ型熱交換器であって、
前記主熱交換器と前記副熱交換器は、複数並べられ、その間を、前記室外送風ファンの回転に伴って発生する空気が流動するフィンと、前記フィンに所定の段ピッチおよび列ピッチで略直角に挿入され、内部を冷媒が流動する複数の伝熱管と、からなり、
前記主熱交換器と前記副熱交換器の一端は、別々の端板で構成されることを特徴とする空気調和機。A refrigeration cycle in which a compressor, an indoor heat exchanger, expansion means, and an outdoor heat exchanger are connected by a refrigerant circuit;
An outdoor fan that conveys air to the outdoor heat exchanger;
With
The outdoor heat exchanger is a finned tube heat exchanger composed of a plurality of heat exchanger rows including three or more rows of main heat exchangers and sub heat exchangers,
A plurality of the main heat exchangers and the sub heat exchangers are arranged, and a gap between the main heat exchanger and the sub heat exchanger flows between the fins through which the air generated by the rotation of the outdoor blower fan flows. It consists of a plurality of heat transfer tubes that are inserted at right angles and in which the refrigerant flows,
One end of the main heat exchanger and the sub heat exchanger is composed of separate end plates. 前記室外熱交換器の少なくとも一端は、略Ｌ字状に折曲して形成されたことを特徴とする請求項１に記載の空気調和機。   The air conditioner according to claim 1, wherein at least one end of the outdoor heat exchanger is formed to be bent in a substantially L shape. 前記副熱交換器は、前記室外送風ファンの回転に伴って発生する空気の流動に対して風上側に配設するとともに、前記副熱交換器の前記伝熱管の外径は、前記主熱交換器の前記伝熱管の外径よりも細いことを特徴とする請求項１または２に記載の空気調和機。   The auxiliary heat exchanger is disposed on the windward side with respect to the air flow generated with the rotation of the outdoor fan, and the outer diameter of the heat transfer tube of the auxiliary heat exchanger is the main heat exchange. The air conditioner according to claim 1 or 2, wherein the air conditioner is narrower than an outer diameter of the heat transfer tube of the vessel. 前記室外熱交換器は、前記室外送風ファンの回転に伴って発生する空気の流動に対して風下側の前記フィンの面上に、前記空気の流動に対向して開口した切起こしを設けたことを特徴とする請求項１乃至３のいずれか一項に記載の空気調和機。   The outdoor heat exchanger is provided with a cut-and-raised opening on the surface of the fin on the leeward side with respect to the air flow generated by the rotation of the outdoor fan, facing the air flow. The air conditioner as described in any one of Claims 1 thru | or 3 characterized by these.
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JP2002206773A (en) * 2001-01-12 2002-07-26 Sharp Corp Heat exchanger for outdoor unit of air conditioner
JP2008111622A (en) * 2006-10-31 2008-05-15 Toshiba Kyaria Kk Heat exchanger, outdoor unit of air conditioner using the same
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JP2001304783A (en) * 2000-04-14 2001-10-31 Daikin Ind Ltd Outdoor heat exchanger, indoor heat exchanger, and air conditioner
JP2002130743A (en) * 2000-10-30 2002-05-09 Mitsubishi Heavy Ind Ltd Outdoor heat exchanger unit structure, outdoor unit, and gas heat pump type air conditioner
JP2002206773A (en) * 2001-01-12 2002-07-26 Sharp Corp Heat exchanger for outdoor unit of air conditioner
JP2008111622A (en) * 2006-10-31 2008-05-15 Toshiba Kyaria Kk Heat exchanger, outdoor unit of air conditioner using the same
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