JP2012093034A - Air conditioner - Google Patents

Air conditioner Download PDF

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JP2012093034A
JP2012093034A JP2010240896A JP2010240896A JP2012093034A JP 2012093034 A JP2012093034 A JP 2012093034A JP 2010240896 A JP2010240896 A JP 2010240896A JP 2010240896 A JP2010240896 A JP 2010240896A JP 2012093034 A JP2012093034 A JP 2012093034A
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heat exchanger
outdoor heat
outdoor
air conditioner
fin
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JP5592233B2 (en
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Takayuki Yagyu
隆之 柳生
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Sharp Corp
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Sharp Corp
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Priority to JP2010240896A priority Critical patent/JP5592233B2/en
Priority to PCT/JP2011/071095 priority patent/WO2012056824A1/en
Priority to US13/819,869 priority patent/US20130205823A1/en
Priority to SE1350502A priority patent/SE538070C2/en
Priority to CN2011204103564U priority patent/CN202630542U/en
Publication of JP2012093034A publication Critical patent/JP2012093034A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F24F1/18—Heat exchangers specially adapted for separate outdoor units characterised by their shape
    • 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
    • F24F1/36—Drip trays for outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/14—Collecting or removing condensed and defrost water; Drip trays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F17/00—Removing ice or water from heat-exchange apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • 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

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner that carries out a heating operation and also a defrost operation, thereby enhancing comfort.SOLUTION: The air conditioner includes a compressor 21 which operates the refrigeration cycle, an indoor heat exchanger 13 which exchanges heat with indoor air, and an outdoor heat exchanger 23 which exchanges heat with outdoor air. The air conditioner performs heating operation by driving the compressor 21, the heating operation being performed while the indoor heat exchanger 13 serves as the high temperature part of the refrigeration cycle and the outdoor heat exchanger 23 serves as the low temperature part of the refrigeration cycle. The air conditioner also performs defrosting operation for defrosting the outdoor heat exchanger 23 which serves as the high temperature part of the refrigeration cycle, the defrosting operation being performed while the refrigerant is caused to flow in the direction opposite the direction of the flow of the refrigerant in the heating operation. In the outdoor heat exchanger 23, a large number of fins 30 are affixed to refrigerant pipes 2 so as to be close to each other. Air flow passes through between the fins 30 to perform heat exchange. A water introduction section 31, 32 for closing each of the gaps between the fins 30 at one end thereof in the air flow path direction is provided at the lower end of the outdoor heat exchanger 23.

Description

本発明は、暖房運転を行うとともに除霜運転を行う空気調和機に関する。   The present invention relates to an air conditioner that performs a defrosting operation while performing a heating operation.

従来の空気調和機は特許文献１に開示されている。この空気調和機は室内に配される室内機と室外に配される室外機とを備えている。室外機には圧縮機、室外熱交換器及び室外ファンが配され、室内機には室内熱交換器及び室内ファンが配される。圧縮機は冷媒を流通させて冷凍サイクルを運転する。室内熱交換器及び室外熱交換器は冷媒管に多数のフィンが近接して固着され、フィン間を通過する空気と熱交換を行う。   A conventional air conditioner is disclosed in Patent Document 1. This air conditioner includes an indoor unit arranged indoors and an outdoor unit arranged outdoors. The outdoor unit is provided with a compressor, an outdoor heat exchanger, and an outdoor fan, and the indoor unit is provided with an indoor heat exchanger and an indoor fan. The compressor operates the refrigeration cycle by circulating the refrigerant. In the indoor heat exchanger and the outdoor heat exchanger, a large number of fins are fixed in close proximity to the refrigerant pipe, and exchange heat with air passing between the fins.

圧縮機の冷媒吐出側には四方弁を介して室内熱交換器及び室外熱交換器の一端がそれぞれ冷媒管により接続される。室内熱交換器及び室外熱交換器の他端は膨張弁を介して冷媒管により接続される。室外ファンは室外熱交換器に対向配置され、室外熱交換器と室外の空気との熱交換を促進する。室内ファンは室内の空気を室内機に取り込んで室内熱交換器と熱交換した空気を室内に送出する。   One end of each of the indoor heat exchanger and the outdoor heat exchanger is connected to the refrigerant discharge side of the compressor by a refrigerant pipe via a four-way valve. The other ends of the indoor heat exchanger and the outdoor heat exchanger are connected by a refrigerant pipe via an expansion valve. The outdoor fan is disposed opposite to the outdoor heat exchanger, and promotes heat exchange between the outdoor heat exchanger and outdoor air. The indoor fan takes indoor air into the indoor unit and sends out the air heat-exchanged with the indoor heat exchanger into the room.

暖房運転時には四方弁の切り替えによって圧縮機から吐出された冷媒は室内熱交換器、膨張弁、室外熱交換器を流通して圧縮機に戻る。これにより、室内熱交換器が冷凍サイクルの高温部となり、室外熱交換器が冷凍サイクルの低温部となる。室内の空気は室内熱交換器との熱交換により昇温して室内に送出され、室内の暖房が行われる。   During the heating operation, the refrigerant discharged from the compressor by switching the four-way valve flows through the indoor heat exchanger, the expansion valve, and the outdoor heat exchanger and returns to the compressor. Thereby, an indoor heat exchanger becomes a high temperature part of a refrigerating cycle, and an outdoor heat exchanger becomes a low temperature part of a refrigerating cycle. The indoor air is heated by the heat exchange with the indoor heat exchanger, sent out indoors, and the room is heated.

冷房運転時には四方弁の切り替えによって圧縮機から吐出された冷媒は暖房運転時と逆方向に流通する。即ち、冷媒は室外熱交換器、膨張弁、室内熱交換器を流通して圧縮機に戻る。これにより、室外熱交換器が冷凍サイクルの高温部となり、室内熱交換器が冷凍サイクルの低温部となる。室内の空気は室内熱交換器との熱交換により降温して室内に送出され、室内の冷房が行われる。   During the cooling operation, the refrigerant discharged from the compressor by switching the four-way valve flows in the opposite direction to that during the heating operation. That is, the refrigerant flows through the outdoor heat exchanger, the expansion valve, and the indoor heat exchanger and returns to the compressor. Thereby, an outdoor heat exchanger becomes a high temperature part of a refrigerating cycle, and an indoor heat exchanger becomes a low temperature part of a refrigerating cycle. The indoor air is cooled by heat exchange with the indoor heat exchanger, sent to the room, and the room is cooled.

また、暖房運転時に室外熱交換器が着霜するため、所定の間隔で除霜運転が行われる。除霜運転時には室内ファン及び室外ファンが停止され、四方弁の切り替えによって冷媒が冷房運転時と同じ方向に流通する。これにより、室外熱交換器が冷凍サイクルの高温部となり、室外熱交換器の霜が融解する。霜の融解による除霜水はフィンを流下して室外熱交換器の下方に落下し、室外熱交換器を除霜することができる。   Further, since the outdoor heat exchanger is frosted during the heating operation, the defrosting operation is performed at predetermined intervals. During the defrosting operation, the indoor fan and the outdoor fan are stopped, and the refrigerant flows in the same direction as during the cooling operation by switching the four-way valve. Thereby, an outdoor heat exchanger becomes a high temperature part of a refrigerating cycle, and the frost of an outdoor heat exchanger melts. The defrost water by melting frost flows down the fins and falls below the outdoor heat exchanger, so that the outdoor heat exchanger can be defrosted.

特開２０１０−１８１０３６号公報（第４頁−第６頁、第１図）Japanese Unexamined Patent Publication No. 2010-181036 (pages 4-6, FIG. 1)

しかしながら、上記従来の空気調和機によると、除霜運転時に室外熱交換器のフィンを伝って流下する除霜水は隣接するフィン間の表面張力により下端で保持される。このため、寒冷地等で室外機を設置した屋外が低温の場合に、除霜運転が停止されるとフィンに保持された除霜水が再凍結する。この状態で暖房運転が行われるとフィン間で再凍結した氷上に霜が成長するため着霜量が増加し、除霜運転の間隔を短くする必要がある。従って、室内の暖房が十分行われずに快適性が低下する問題があった。   However, according to the conventional air conditioner, the defrost water flowing down through the fins of the outdoor heat exchanger during the defrosting operation is held at the lower end by the surface tension between the adjacent fins. For this reason, when the outdoor where the outdoor unit is installed in a cold region or the like is at a low temperature, the defrost water held by the fins is frozen again when the defrost operation is stopped. When heating operation is performed in this state, frost grows on ice that has been re-frozen between the fins, so the amount of frost formation increases, and the interval between defrosting operations must be shortened. Accordingly, there is a problem that comfort is lowered without sufficient heating of the room.

本発明は、快適性を向上できる空気調和機を提供することを目的とする。   An object of this invention is to provide the air conditioner which can improve comfort.

上記目的を達成するために本発明は、冷凍サイクルを運転する圧縮機と、室内の空気と熱交換を行う室内熱交換機と、室外の空気と熱交換を行う室外熱交換器とを備え、前記圧縮機の駆動により冷凍サイクルの高温部を前記室内熱交換器として低温部を前記室外熱交換器とする暖房運転を行うとともに、前記暖房運転時と逆方向に冷媒を流通させて冷凍サイクルの高温部となる前記室外熱交換器を除霜する除霜運転を行う空気調和機において、前記室外熱交換器は冷媒管に多数のフィンを近接して固着するとともに前記フィン間を気流が通過して熱交換を行い、前記除霜運転時に前記フィンの気流通過方向の一端側を流下する除霜水を受けて他端側に導く導水部を前記室外熱交換器の下端に設けたことを特徴としている。   To achieve the above object, the present invention comprises a compressor that operates a refrigeration cycle, an indoor heat exchanger that exchanges heat with indoor air, and an outdoor heat exchanger that exchanges heat with outdoor air, The compressor is driven to perform a heating operation in which the high-temperature portion of the refrigeration cycle is the indoor heat exchanger and the low-temperature portion is the outdoor heat exchanger, and the refrigerant is circulated in the opposite direction to that during the heating operation to increase the temperature of the refrigeration cycle. In the air conditioner that performs a defrosting operation for defrosting the outdoor heat exchanger as a part, the outdoor heat exchanger has a large number of fins adhering to the refrigerant pipe in close proximity, and airflow passes between the fins. A heat transfer section is provided at the lower end of the outdoor heat exchanger for performing heat exchange, receiving defrost water flowing down one end side in the airflow passage direction of the fin during the defrosting operation and guiding it to the other end side. Yes.

この構成によると、暖房運転時には圧縮機の駆動によって冷媒が流通して冷凍サイクルが運転される。室外熱交換器は冷凍サイクルの低温部となり、冷凍サイクルの高温部となる室内熱交換器と熱交換した空気を室内に送出して室内の暖房が行われる。この時、室外熱交換器はフィン間を通過する室外の空気と熱交換を行う。室外熱交換器が着霜すると除霜運転が行われる。除霜運転時には冷媒が暖房運転時と逆方向に流通し、室外熱交換器が冷凍サイクルの高温部となる。これにより、室外熱交換器の着霜が融解し、除霜水がフィンを伝って流下する。この時、フィンの一端側（例えば、気流流出側）を流下する除霜水は下端に配した導水部により他端側（例えば、気流流入側）に導かれ、他端側を流下する除霜水と合流して室外熱交換器の下方に落下する。   According to this configuration, during the heating operation, the refrigerant flows by driving the compressor and the refrigeration cycle is operated. The outdoor heat exchanger becomes a low temperature part of the refrigeration cycle, and air heated by the indoor heat exchanger that becomes the high temperature part of the refrigeration cycle is sent into the room to heat the room. At this time, the outdoor heat exchanger exchanges heat with outdoor air passing between the fins. When the outdoor heat exchanger is frosted, a defrosting operation is performed. During the defrosting operation, the refrigerant flows in the opposite direction to that during the heating operation, and the outdoor heat exchanger becomes a high temperature part of the refrigeration cycle. Thereby, the frost formation of an outdoor heat exchanger melt | dissolves and defrost water flows down along a fin. At this time, the defrost water flowing down one end side (for example, the airflow outflow side) of the fin is guided to the other end side (for example, the airflow inflow side) by the water guide portion arranged at the lower end, and the defrosting water flows down the other end side. It merges with water and falls below the outdoor heat exchanger.

また本発明は、上記構成の空気調和機において、前記導水部が前記フィンの下端に接して前記フィンの並設方向に延びた断面Ｌ字状の板状部材から成ることを特徴としている。この構成によると、フィンの一端側を流下する除霜水は断面Ｌ字状の導水部により他端側に導かれる。   Further, the present invention is characterized in that, in the air conditioner configured as described above, the water guide portion is composed of a plate-like member having an L-shaped cross section that extends in the direction in which the fins are arranged in contact with the lower end of the fin. According to this structure, the defrost water which flows down the one end side of a fin is guide | induced to the other end side by the cross-section L-shaped water guide part.

また本発明は、上記構成の空気調和機において、前記導水部がフィンの下面を含むコーナー部を折曲して形成されることを特徴としている。この構成によると、フィンの一端側を流下する除霜水はフィンの下端のコーナー部を折曲した導水部により他端側に導かれる。   In the air conditioner having the above-described configuration, the water guide portion is formed by bending a corner portion including the lower surface of the fin. According to this structure, the defrost water which flows down the one end side of a fin is guide | induced to the other end side by the water guide part which bent the corner part of the lower end of a fin.

また本発明は、上記構成の空気調和機において、前記冷媒管を気流通過方向に複数列設けて千鳥状に配置し、気流通過方向の一端側に配した前記冷媒管の下端が他端側に配した前記冷媒管の下端よりも上方に配されることを特徴としている。この構成によると、フィンの気流通過方向に冷媒管が並設され、フィンの下端から冷媒管までの距離が大きい方に導水部が形成される。   Further, the present invention provides the air conditioner having the above-described configuration, wherein the refrigerant tubes are arranged in a staggered manner in a plurality of rows in the airflow passage direction, and the lower end of the refrigerant tube arranged on one end side in the airflow passage direction is on the other end side. It is characterized by being arranged above the lower end of the arranged refrigerant pipe. According to this configuration, the refrigerant pipes are arranged side by side in the fin airflow passage direction, and the water guide portion is formed in the direction where the distance from the lower end of the fin to the refrigerant pipe is larger.

また本発明は、上記構成の空気調和機において、前記室外熱交換器は前記暖房運転時の気流通過方向の下流側に前記導水部が設けられることを特徴としている。この構成によると、暖房運転時に室外の空気が室外熱交換器の冷媒管及びフィンと熱交換を行う。この時、下部のフィン間を通過する空気は下流側に配された導水部に衝突して上方に流通する。   In the air conditioner configured as described above, the outdoor heat exchanger is characterized in that the water guide section is provided on the downstream side in the airflow passage direction during the heating operation. According to this configuration, outdoor air exchanges heat with the refrigerant pipes and fins of the outdoor heat exchanger during heating operation. At this time, the air passing between the lower fins collides with the water guide portion arranged on the downstream side and flows upward.

また本発明は、上記構成の空気調和機において、前記暖房運転時に冷凍サイクルの高温部に配される冷媒管を前記室外熱交換器の下方に配したことを特徴としている。この構成によると、室外熱交換器の下方に配した冷媒管は暖房運転時に冷凍サイクルの高温部となり、室外熱交換器の下部や室外機の底壁の着霜が抑制される。   In the air conditioner having the above-described configuration, the present invention is characterized in that a refrigerant pipe disposed in a high temperature part of the refrigeration cycle during the heating operation is disposed below the outdoor heat exchanger. According to this configuration, the refrigerant pipe disposed below the outdoor heat exchanger becomes a high temperature part of the refrigeration cycle during heating operation, and frost formation on the lower part of the outdoor heat exchanger and the bottom wall of the outdoor unit is suppressed.

本発明によると、除霜運転時にフィンの気流通過方向の一端側を流下する除霜水を受けてフィンの気流通過方向の他端側に導く導水部を室外熱交換器の下端に設けたので、フィンの一端側を流下する除霜水が他端側を流下する除霜水と合流して下方に落下する。このため、フィンの下端に導かれる除霜水の単位面積当たりの流量が増加し、フィンの下端から除霜水が勢いよく落下する。これにより、表面張力によってフィンの下端に保持される除霜水を低減し、室外熱交換器の着霜量を減少させることができる。従って、除霜運転の間隔を長くして快適性を向上することができる。   According to the present invention, the dewatering water flowing down one end side in the airflow passage direction of the fin during the defrosting operation is provided at the lower end of the outdoor heat exchanger so as to guide the defrost water to the other end side in the airflow passage direction of the fin. The defrost water flowing down one end side of the fin joins with the defrost water flowing down the other end side and falls downward. For this reason, the flow rate per unit area of the defrost water led to the lower end of the fin is increased, and the defrost water falls off from the lower end of the fin. Thereby, the defrost water hold | maintained at the lower end of a fin by surface tension can be reduced, and the amount of frost formation of an outdoor heat exchanger can be reduced. Therefore, comfort can be improved by lengthening the interval of the defrosting operation.

本発明の第１実施形態の空気調和機の冷凍サイクルを示す回路図The circuit diagram which shows the refrigerating cycle of the air conditioner of 1st Embodiment of this invention. 本発明の第１実施形態の空気調和機の室外機の内部を示す斜視図The perspective view which shows the inside of the outdoor unit of the air conditioner of 1st Embodiment of this invention. 本発明の第１実施形態の空気調和機の室外機を示す分解斜視図The disassembled perspective view which shows the outdoor unit of the air conditioner of 1st Embodiment of this invention. 本発明の第１実施形態の空気調和機の室外熱交換器を示す縦断面図The longitudinal cross-sectional view which shows the outdoor heat exchanger of the air conditioner of 1st Embodiment of this invention 本発明の第２実施形態の空気調和機の室外熱交換器を示す縦断面図The longitudinal cross-sectional view which shows the outdoor heat exchanger of the air conditioner of 2nd Embodiment of this invention 図５のＤ矢視図FIG. 5 D arrow view

以下に本発明の実施形態を図面を参照して説明する。図１は第１実施形態の空気調和機の冷凍サイクルを示す回路図である。空気調和機１は室内に配される室内機１０と室外に配される室外機２０とを有している。空気調和機１は冷媒管２内に冷媒を流通させて冷凍サイクルを運転する圧縮機２１が室外機２０内に配される。   Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram showing a refrigeration cycle of the air conditioner of the first embodiment. The air conditioner 1 has an indoor unit 10 arranged indoors and an outdoor unit 20 arranged outdoor. In the air conditioner 1, a compressor 21 that operates a refrigeration cycle by circulating a refrigerant in the refrigerant pipe 2 is disposed in the outdoor unit 20.

室外機２０内には圧縮機２１に接続される四方弁２２、室外熱交換器２３、膨張弁２４、室外ファン２５が設けられる。室内機１０内には室内熱交換器１３、室内ファン１５が設けられる。室内熱交換器１３及び室外熱交換器２３は冷媒管２に多数のフィン３０（図４参照）が近接して固着され、フィン３０間を通過する空気と熱交換を行う。   In the outdoor unit 20, a four-way valve 22 connected to the compressor 21, an outdoor heat exchanger 23, an expansion valve 24, and an outdoor fan 25 are provided. An indoor heat exchanger 13 and an indoor fan 15 are provided in the indoor unit 10. In the indoor heat exchanger 13 and the outdoor heat exchanger 23, a large number of fins 30 (see FIG. 4) are fixed in close proximity to the refrigerant pipe 2 and exchange heat with air passing between the fins 30.

圧縮機２１には四方弁２２を介して室外熱交換器２３及び室内熱交換器１３の一端が冷媒管２により接続される。室外熱交換器２３及び室内熱交換器１３の他端は膨張弁２４を介して冷媒管２により接続される。また、膨張弁２４と室内熱交換器１３との間の冷媒管２によって室外熱交換器２３の下方に配されるヒートパイプ２６が形成される。   One end of the outdoor heat exchanger 23 and the indoor heat exchanger 13 is connected to the compressor 21 via the four-way valve 22 by the refrigerant pipe 2. The other ends of the outdoor heat exchanger 23 and the indoor heat exchanger 13 are connected by the refrigerant pipe 2 via the expansion valve 24. Further, a heat pipe 26 disposed below the outdoor heat exchanger 23 is formed by the refrigerant pipe 2 between the expansion valve 24 and the indoor heat exchanger 13.

室外ファン２５は室外熱交換器２３に対向配置される。室外ファン２５の駆動によって室外の空気が室外熱交換器２３に供給され、室外熱交換器２３と室外の空気との熱交換が促進される。室外熱交換器２３と熱交換した空気は室外ファン２５に面して室外機２０に開口する排気口（不図示）を介して外部に排気される。   The outdoor fan 25 is disposed opposite to the outdoor heat exchanger 23. Outdoor air is supplied to the outdoor heat exchanger 23 by driving the outdoor fan 25, and heat exchange between the outdoor heat exchanger 23 and the outdoor air is promoted. The air that has exchanged heat with the outdoor heat exchanger 23 is exhausted to the outside through an exhaust port (not shown) that faces the outdoor fan 25 and opens to the outdoor unit 20.

室内ファン１５及び室内熱交換器１３は室内機１０に設けた送風通路（不図示）内に配される。室内ファン１５の駆動によって室内の空気が送風通路に流入して室内熱交換器１３に供給され、送風通路を流通する空気と室内熱交換器１３とが熱交換される。室内熱交換器１３と熱交換した空気は室内機１０に開口する吹出口（不図示）を介して室内に送出される。   The indoor fan 15 and the indoor heat exchanger 13 are arranged in a ventilation passage (not shown) provided in the indoor unit 10. Indoor air flows into the ventilation passage by driving the indoor fan 15 and is supplied to the indoor heat exchanger 13, and the air flowing through the ventilation passage and the indoor heat exchanger 13 are heat-exchanged. The air that has exchanged heat with the indoor heat exchanger 13 is sent out indoors through an outlet (not shown) that opens to the indoor unit 10.

図２は空気調和機１の室外機２０の内部を示す斜視図である。また、図３は室外機２０の要部の分解斜視図である。室外機２０は前後方向に短く左右方向に長い平面視略矩形の底板２９上の左右方向の一端に圧縮機２１が取り付けられる。室外熱交換器２３は平面視略Ｌ字状に形成され、室外機２０の圧縮機２１と反対側の側部と後部とにわたって立設される。また、室外熱交換器２３の下方にはヒートパイプ２６が配される。底板２９の室外熱交換器２３の下方には排水孔２９ａが１箇所以上設けられる。   FIG. 2 is a perspective view showing the inside of the outdoor unit 20 of the air conditioner 1. FIG. 3 is an exploded perspective view of a main part of the outdoor unit 20. The outdoor unit 20 has a compressor 21 attached to one end in the left-right direction on a substantially rectangular bottom plate 29 that is short in the front-rear direction and long in the left-right direction. The outdoor heat exchanger 23 is formed in a substantially L shape in plan view, and is erected over a side portion and a rear portion of the outdoor unit 20 opposite to the compressor 21. A heat pipe 26 is disposed below the outdoor heat exchanger 23. One or more drain holes 29 a are provided below the outdoor heat exchanger 23 of the bottom plate 29.

室外ファン２５は軸方向を前後方向に配し、室外熱交換器２３に対峙して設置される。室外ファン２５の駆動により室外の空気が主として矢印Ｂに示すように室外機２０の後方から前方に流通して室外熱交換器２３と熱交換を行う。尚、一部の空気は側方から室外機２０内に流入して室外熱交換器２３の側部と熱交換し、前方に導かれる。   The outdoor fan 25 is disposed so as to face the outdoor heat exchanger 23 with its axial direction in the front-rear direction. As the outdoor fan 25 is driven, outdoor air mainly flows from the rear of the outdoor unit 20 to the front as indicated by an arrow B to exchange heat with the outdoor heat exchanger 23. Part of the air flows into the outdoor unit 20 from the side, exchanges heat with the side of the outdoor heat exchanger 23, and is guided forward.

図４は室外熱交換器２３の縦断面図を示している。室外熱交換器２３は縦方向に所定のピッチＰで蛇行する冷媒管２が前後方向に２列設けられる。前後の冷媒管２は上下方向の位置がずれた千鳥状に配置される。これにより、矢印Ｂに示すように流通する空気を前後の冷媒管２と接触させることができ、熱交換効率を向上することができる。   FIG. 4 shows a longitudinal sectional view of the outdoor heat exchanger 23. The outdoor heat exchanger 23 is provided with two rows of refrigerant tubes 2 meandering at a predetermined pitch P in the longitudinal direction. The front and rear refrigerant pipes 2 are arranged in a staggered manner with their vertical positions shifted. Thereby, the air which distribute | circulates as shown to the arrow B can be made to contact with the front and back refrigerant | coolant pipe | tube 2, and heat exchange efficiency can be improved.

前後の冷媒管２にはそれぞれ縦方向に延びる矩形のフィン３０が固着され、室外熱交換器２３はフィンアンドチューブ型に構成される。フィン３０は冷媒管２が延びる方向に所定の間隔（例えば、１．３ｍｍ）で近接して設けられ、フィン３０間を矢印Ｂに示すように気流が通過する。気流が通過する上流側の冷媒管２にはフィン３０ａが設けられ、下流側の冷媒管２にはフィン３０ｂが設けられる。   Rectangular fins 30 extending in the vertical direction are respectively fixed to the front and rear refrigerant tubes 2, and the outdoor heat exchanger 23 is configured as a fin-and-tube type. The fins 30 are provided close to each other at a predetermined interval (for example, 1.3 mm) in the direction in which the refrigerant pipe 2 extends, and an airflow passes between the fins 30 as indicated by an arrow B. The upstream refrigerant pipe 2 through which the airflow passes is provided with fins 30a, and the downstream refrigerant pipe 2 is provided with fins 30b.

下流側のフィン３０ｂの下端には導水部３１が接して配される。導水部３１は左右方向に延びた断面Ｌ字状の金属製の板状部材により形成される。導水部３１は除霜運転時に下流側のフィン３０ｂを流下する除霜水を上流側のフィン３０ａに導く。   The water guide portion 31 is disposed in contact with the lower end of the downstream fin 30b. The water guide portion 31 is formed by a metal plate-like member having an L-shaped cross section extending in the left-right direction. The water guide section 31 guides the defrost water flowing down the downstream fin 30b to the upstream fin 30a during the defrosting operation.

上記構成の空気調和機において、暖房運転時には室内ファン１５及び室外ファン２５が駆動され、四方弁２２が図中、実線で示すように切り替えられる。これにより、圧縮機２１の駆動によって矢印Ａに示す方向に冷媒が流通し、圧縮機２１により圧縮された高温高圧の冷媒は室内熱交換器１３で放熱しながら凝縮する。   In the air conditioner having the above configuration, the indoor fan 15 and the outdoor fan 25 are driven during the heating operation, and the four-way valve 22 is switched as indicated by a solid line in the drawing. Thus, the refrigerant flows in the direction indicated by the arrow A by driving the compressor 21, and the high-temperature and high-pressure refrigerant compressed by the compressor 21 is condensed while releasing heat in the indoor heat exchanger 13.

高温の冷媒はヒートパイプ２６を通った後に膨張弁２４で低温低圧となり、室外熱交換器２３に送られる。ヒートパイプ２６によって底板２９上や室外熱交換器２３の下端の着霜が低減される。特に寒冷地仕様の室外機２０では着霜量が多くなるため、室外熱交換器２３の下方にヒートパイプ２６を装備することがよく行われる。   After passing through the heat pipe 26, the high-temperature refrigerant becomes low-temperature and low-pressure at the expansion valve 24 and is sent to the outdoor heat exchanger 23. The heat pipe 26 reduces frost formation on the bottom plate 29 and the lower end of the outdoor heat exchanger 23. In particular, in the outdoor unit 20 in a cold district specification, the amount of frost formation increases, and therefore, it is often performed to equip the heat pipe 26 below the outdoor heat exchanger 23.

室外熱交換器２３に流入する冷媒は吸熱しながら蒸発して低温のガス冷媒となり、圧縮機２１に送られる。これにより、冷媒が循環して冷凍サイクルが運転される。冷凍サイクルの高温部となる室内熱交換器１３と熱交換した空気が室内ファン１５により室内に送出され、室内の暖房が行われる。また、冷凍サイクルの低温部となる室外熱交換器２３と熱交換した空気が室内ファン２５により外部に排気される。   The refrigerant flowing into the outdoor heat exchanger 23 evaporates while absorbing heat to become a low-temperature gas refrigerant, and is sent to the compressor 21. Thereby, the refrigerant circulates and the refrigeration cycle is operated. The air heat-exchanged with the indoor heat exchanger 13 which is a high temperature part of the refrigeration cycle is sent out indoors by the indoor fan 15 and the room is heated. In addition, the air exchanged with the outdoor heat exchanger 23 that is a low temperature part of the refrigeration cycle is exhausted to the outside by the indoor fan 25.

冷房運転時には室内ファン１５及び室外ファン２５が駆動され、四方弁２２が図中、破線で示すように切り替えられる。これにより、圧縮機２１の駆動によって矢印Ａと逆方向に冷媒が流通し、室内熱交換器１３が冷凍サイクルの低温部となるとともに室外熱交換器２３が冷凍サイクルの高温部となる。室内熱交換器１３と熱交換した空気が室内ファン１５により室内に送出され、室内の冷房が行われる。また、冷凍サイクルの高温部となる室外熱交換器２３と熱交換した空気が室内ファン２５により外部に排気される。   During the cooling operation, the indoor fan 15 and the outdoor fan 25 are driven, and the four-way valve 22 is switched as indicated by a broken line in the figure. Thereby, the refrigerant flows in the direction opposite to the arrow A by driving the compressor 21, the indoor heat exchanger 13 becomes the low temperature part of the refrigeration cycle, and the outdoor heat exchanger 23 becomes the high temperature part of the refrigeration cycle. The air heat-exchanged with the indoor heat exchanger 13 is sent out indoors by the indoor fan 15, and the room is cooled. In addition, the air exchanged with the outdoor heat exchanger 23 that is a high temperature part of the refrigeration cycle is exhausted to the outside by the indoor fan 25.

また、暖房運転によって冷凍サイクルの低温部となる室外熱交換器２３が着霜するため、所定の間隔で除霜運転が行われる。除霜運転では室内ファン１５及び室外ファン２５が停止され、四方弁２２が図中、破線で示すように切り替えられる。これにより、圧縮機２１の駆動によって矢印Ａと逆方向に冷媒が流通し、室内熱交換器１３が冷凍サイクルの低温部となるとともに室外熱交換器２３が冷凍サイクルの高温部となる。   Moreover, since the outdoor heat exchanger 23 which becomes a low temperature part of the refrigeration cycle is frosted by the heating operation, the defrosting operation is performed at a predetermined interval. In the defrosting operation, the indoor fan 15 and the outdoor fan 25 are stopped, and the four-way valve 22 is switched as shown by a broken line in the figure. Thereby, the refrigerant flows in the direction opposite to the arrow A by driving the compressor 21, the indoor heat exchanger 13 becomes the low temperature part of the refrigeration cycle, and the outdoor heat exchanger 23 becomes the high temperature part of the refrigeration cycle.

室外ファン２５の停止によって室外熱交換器２３と室外の空気との熱交換が抑制され、室外熱交換器２３を効率よく昇温することができる。また、室内ファン１５の停止によって低温の空気の室内への送出を防止することができる。   By stopping the outdoor fan 25, heat exchange between the outdoor heat exchanger 23 and the outdoor air is suppressed, and the outdoor heat exchanger 23 can be efficiently heated. Moreover, the stop of the indoor fan 15 can prevent the low temperature air from being sent into the room.

室外熱交換器２３の昇温によって室外熱交換器２３の着霜は融解し、フィン３０を伝って流下する。気流通過方向の一端側（下流側）のフィン３０ｂを流下する除霜水は下端で導水部３１で受けられて他端側（上流側）に導かれる。気流通過方向の上流側のフィン３０ａを流下する除霜水は導水部３１により導水された下流側の除霜水と合流してフィン３０ａの下端から落下する。室外熱交換器２３から落下した除霜水は排水孔２９ａを介して排水される。   The frost on the outdoor heat exchanger 23 is melted by the temperature rise of the outdoor heat exchanger 23 and flows down through the fins 30. The defrost water flowing down the fin 30b on one end side (downstream side) in the airflow passage direction is received by the water guide portion 31 at the lower end and guided to the other end side (upstream side). The defrost water flowing down the upstream fin 30a in the air flow passage direction joins with the downstream defrost water guided by the water guide 31 and falls from the lower end of the fin 30a. The defrost water dropped from the outdoor heat exchanger 23 is drained through the drain hole 29a.

この時、導水部３１を一部に設けたフィン３０の下端から排水される除霜水の単位面積当たりの流量が導水部３１を設けない場合に比べて増加し、フィン３０の下端から除霜水が勢いよく落下する。これにより、表面張力によってフィン３０の下端に保持される除霜水を低減することができる。   At this time, the flow rate per unit area of defrost water drained from the lower end of the fin 30 provided with the water guide portion 31 is increased as compared with the case where the water guide portion 31 is not provided, and the defrost is started from the lower end of the fin 30. Water falls down vigorously. Thereby, the defrost water hold | maintained at the lower end of the fin 30 by surface tension can be reduced.

尚、導水部３１を設けていないフィン３０ａの下方に排水孔２９ａを配置すると排水性が向上する。即ち、フィン３０を流下して導水部３１により合流した除霜水が落下する位置に排水孔２９ａを配置することで、排水孔２９ａを介して除霜水を容易に排水することができる。   In addition, if the drain hole 29a is arrange | positioned under the fin 30a which does not provide the water guide part 31, drainage will improve. That is, the defrost water can be easily drained through the drain hole 29a by disposing the drain hole 29a at the position where the defrost water that has flowed down the fin 30 and merged by the water guide portion 31 falls.

本実施形態によると、除霜運転時にフィン３０の気流通過方向の一端側を流下する除霜水を受けてフィン３０の気流通過方向の他端側に導く導水部３１を室外熱交換器２３の下端に設けたので、フィン３０の一端側を流下する除霜水が他端側を流下する除霜水と合流して下方に落下する。このため、フィン３０の下端から排水される除霜水の単位面積当たりの流量が増加し、フィン３０の下端から除霜水が勢いよく落下する。これにより、表面張力によってフィン３０の下端に保持される除霜水を低減し、室外熱交換器２３の着霜量を減少させることができる。従って、除霜運転の間隔を長くして快適性を向上することができる。   According to the present embodiment, the dewatering water flowing down one end side in the airflow passage direction of the fin 30 during the defrosting operation and the water guide portion 31 that leads to the other end side in the airflow passage direction of the fin 30 are connected to the outdoor heat exchanger 23. Since it provided in the lower end, the defrost water which flows down the one end side of the fin 30 merges with the defrost water which flows down the other end side, and falls below. For this reason, the flow rate per unit area of the defrost water drained from the lower end of the fin 30 increases, and the defrost water falls off from the lower end of the fin 30 vigorously. Thereby, the defrost water hold | maintained at the lower end of the fin 30 by surface tension can be reduced, and the amount of frost formation of the outdoor heat exchanger 23 can be reduced. Therefore, comfort can be improved by lengthening the interval of the defrosting operation.

また、フィン３０の並設方向に延びてフィン３０の下端に接した断面Ｌ字状の板状部材により、除霜水を導水する導水部３１を容易に実現することができる。   Moreover, the water guide part 31 which guides defrost water can be easily implement | achieved by the plate-shaped member of the cross-section L character shape extended in the parallel arrangement direction of the fin 30 and contacted the lower end of the fin 30.

また、暖房運転時に冷凍サイクルの高温部に配されるヒートパイプ２６（冷媒管２）を室外熱交換器２３の下方に配したので、室外機２０の底板及び室外熱交換器２３の下部の着霜を低減することができる。ヒートパイプ２６に替えてガラス管ヒータ等の加熱ヒータを設けてもよい。   Further, since the heat pipe 26 (refrigerant pipe 2) disposed in the high temperature part of the refrigeration cycle during the heating operation is disposed below the outdoor heat exchanger 23, the bottom plate of the outdoor unit 20 and the lower part of the outdoor heat exchanger 23 are attached. Frost can be reduced. Instead of the heat pipe 26, a heater such as a glass tube heater may be provided.

尚、導水部３１を暖房運転時の気流通過方向の上流側のフィン３０に設けてもよい。しかしながら、導水部３１を上流側に設けると気流が矢印Ｂ方向と逆方向に流通し、室外熱交換器２３の下部に導かれる気流は導水部３１に衝突して上下に分散する。このため、導水部３１に対向した下部の冷媒管２及び下部のフィン３０に気流が接触しないため、熱交換効率が低下する。   In addition, you may provide the water guide part 31 in the fin 30 of the upstream of the airflow passage direction at the time of heating operation. However, when the water guide portion 31 is provided on the upstream side, the air flow flows in the direction opposite to the arrow B direction, and the air flow guided to the lower portion of the outdoor heat exchanger 23 collides with the water guide portion 31 and is dispersed vertically. For this reason, since an air current does not contact the lower refrigerant pipe 2 and the lower fins 30 facing the water guide section 31, the heat exchange efficiency is lowered.

導水部３１を暖房運転時の気流通過方向の下流側のフィン３０ｂに設けると、室外熱交換器２３の下部の気流は冷媒管２及びフィン３０と熱交換を行った後、導水部３１に衝突して上方に流通する。これにより、気流通過方向の上流側に導水部３１を設ける場合よりも熱交換面積が増加して熱交換効率を向上することができる。   When the water guide section 31 is provided on the fin 30b on the downstream side in the airflow passage direction during the heating operation, the airflow in the lower part of the outdoor heat exchanger 23 collides with the water guide section 31 after exchanging heat with the refrigerant pipe 2 and the fin 30. And circulates upward. Thereby, compared with the case where the water conveyance part 31 is provided in the upstream of an airflow passage direction, a heat exchange area can increase and heat exchange efficiency can be improved.

次に、図５は第２実施形態の空気調和機１の室外熱交換器２３の縦断面図を示している。また、図６は図５のＤ矢視図を示している。説明の便宜上、前述の図１〜図４に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は第１実施形態の導水部３１（図４参照）に替えて導水部３２が設けられる。その他の部分は第１実施形態と同様である。   Next, FIG. 5 has shown the longitudinal cross-sectional view of the outdoor heat exchanger 23 of the air conditioner 1 of 2nd Embodiment. FIG. 6 is a view taken in the direction of arrow D in FIG. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS. In this embodiment, a water guide portion 32 is provided instead of the water guide portion 31 (see FIG. 4) of the first embodiment. Other parts are the same as those in the first embodiment.

導水部３２は室外熱交換器２３のフィン３０ｂの下面を含むコーナー部を折曲して形成される。また、冷媒管２は千鳥状に配され、気流通過方向の下流側に配した冷媒管２の下端が上流側に配した冷媒管２の下端よりも上方に配される。これにより、導水部３２を形成した下流側のフィン３０ｂの下端と最下部の冷媒管２との距離Ｈ２が、上流側のフィン３０ａの下端と最下部の冷媒管２との距離Ｈ１よりも大きい。これにより、容易にフィン３０ｂを折曲して導水部３２を形成することができる。   The water guide portion 32 is formed by bending a corner portion including the lower surface of the fin 30 b of the outdoor heat exchanger 23. The refrigerant pipes 2 are arranged in a staggered manner, and the lower end of the refrigerant pipe 2 arranged on the downstream side in the airflow passage direction is arranged above the lower end of the refrigerant pipe 2 arranged on the upstream side. Thereby, the distance H2 between the lower end of the downstream fin 30b and the lowermost refrigerant pipe 2 forming the water guide portion 32 is larger than the distance H1 between the lower end of the upstream fin 30a and the lowermost refrigerant pipe 2. . Thereby, the fin part 30b can be bent easily and the water guide part 32 can be formed.

この時、フィン３０ｂは冷媒管２の延びる方向に並設され、隣接するフィン３０ｂの間
隔が狭い。このため、隣接するフィン３０ｂを折曲した導水部３２が互いに重なってオーバーラップする。 At this time, the fins 30b are juxtaposed in the direction in which the refrigerant pipe 2 extends, and the interval between the adjacent fins 30b is narrow. For this reason, the water guide part 32 which bent the adjacent fin 30b mutually overlaps, and overlaps.

除霜運転時に気流通過方向の一端側（下流側）のフィン３０ｂを流下する除霜水は下端で導水部３２で受けられて他端側（上流側）に導かれる。気流通過方向の上流側のフィン３０ａを流下する除霜水は導水部３２により導水された下流側の除霜水と合流して落下する。室外熱交換器２３から落下した除霜水は排水孔２９ａを介して排水される。   The defrost water flowing down the fin 30b on one end side (downstream side) in the airflow passage direction during the defrosting operation is received by the water guide 32 at the lower end and guided to the other end side (upstream side). The defrost water flowing down the upstream fin 30a in the airflow passage direction joins and falls with the downstream defrost water guided by the water guide 32. The defrost water dropped from the outdoor heat exchanger 23 is drained through the drain hole 29a.

この時、導水部３２を一部に設けたフィン３０の下端から排水される除霜水の単位面積当たりの流量が導水部３２を設けない場合に比べて増加し、フィン３０の下端から除霜水が勢いよく落下する。これにより、表面張力によってフィン３０の下端に保持される除霜水を低減することができる。   At this time, the flow rate per unit area of the defrost water drained from the lower end of the fin 30 provided with the water guide portion 32 in part is increased as compared with the case where the water guide portion 32 is not provided, and the defrost is started from the lower end of the fin 30. Water falls down vigorously. Thereby, the defrost water hold | maintained at the lower end of the fin 30 by surface tension can be reduced.

本実施形態によると、第１実施形態と同様に、除霜運転時にフィン３０の気流通過方向の一端側を流下する除霜水を受けてフィン３０の気流通過方向の他端側に導く導水部３２を室外熱交換器２３の下端に設けたので、フィン３０の一端側を流下する除霜水が他端側を流下する除霜水と合流して下方に落下する。このため、フィン３０の下端から排水される除霜水の単位面積当たりの流量が増加し、フィン３０の下端から除霜水が勢いよく落下する。これにより、表面張力によってフィン３０の下端に保持される除霜水を低減し、室外熱交換器２３の着霜量を減少させることができる。従って、除霜運転の間隔を長くして快適性を向上することができる。   According to the present embodiment, similarly to the first embodiment, the water guide portion that receives the defrost water flowing down one end side of the fin 30 in the airflow passage direction and guides it to the other end side of the fin 30 in the airflow passage direction during the defrosting operation. Since 32 is provided in the lower end of the outdoor heat exchanger 23, the defrost water which flows down the one end side of the fin 30 merges with the defrost water which flows down the other end side, and falls below. For this reason, the flow rate per unit area of the defrost water drained from the lower end of the fin 30 increases, and the defrost water falls off from the lower end of the fin 30 vigorously. Thereby, the defrost water hold | maintained at the lower end of the fin 30 by surface tension can be reduced, and the amount of frost formation of the outdoor heat exchanger 23 can be reduced. Therefore, comfort can be improved by lengthening the interval of the defrosting operation.

また、フィン３０の下面を含むコーナー部を折曲して、除霜水を導水する導水部３２を容易に実現することができる。   Moreover, the corner part containing the lower surface of the fin 30 can be bent, and the water guide part 32 which guides defrost water can be implement | achieved easily.

また、冷媒管２を気流通過方向に複数列設けて千鳥状に配置し、下流側の冷媒管２の下端が上流側の冷媒管２の下端よりも上方に配されるので、容易にフィン３０を折曲して導水部３２を形成することができる。   Further, the refrigerant tubes 2 are provided in a plurality of rows in the airflow passage direction and arranged in a zigzag pattern, and the lower end of the downstream refrigerant tube 2 is arranged above the lower end of the upstream refrigerant tube 2, so that the fins 30 can be easily provided. Can be bent to form the water guide portion 32.

尚、上記と同様に、導水部３２を暖房運転時の気流通過方向の上流側のフィン３０に設けてもよい。しかしながら、導水部３２を暖房運転時の気流通過方向の下流側のフィン３０に設けると、気流通過方向の上流側に導水部３２を設ける場合よりも熱交換面積が増加して熱交換効率を向上することができる。   Similarly to the above, the water guide portion 32 may be provided on the fin 30 on the upstream side in the airflow passage direction during the heating operation. However, when the water guide portion 32 is provided on the fin 30 on the downstream side in the airflow passage direction during heating operation, the heat exchange area is increased and the heat exchange efficiency is improved as compared with the case where the water guide portion 32 is provided on the upstream side in the airflow passage direction. can do.

本実施形態において、隣接するフィン３０ｂの導水部３２が重なった部分に例えばロー付けを行ない、重なった部分の隙間を埋める構成であってもよい。このような構成により、導水部３２の重なり部分に生じる隙間も閉ざされるので、下流側の除霜水を上流側に導き易くなる。   In this embodiment, the structure which performs brazing, for example to the part where the water guide part 32 of the adjacent fin 30b overlaps, and fills the clearance gap between the overlapping parts may be sufficient. With such a configuration, the gap generated in the overlapping portion of the water guide portion 32 is also closed, so that the defrost water on the downstream side can be easily guided to the upstream side.

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

第１、第２実施形態において、室外熱交換器２３の前後に並設される冷媒管２は別々のフィン３０ａ、３０ｂが固着されるが、前後の冷媒管２に共通のフィンを固着してもよい。即ち、冷媒管２が延びる方向に並設される各フィンをそれぞれ前後の冷媒管２に跨って固着してもよい。   In the first and second embodiments, separate fins 30a and 30b are fixed to the refrigerant pipes 2 arranged in front of and behind the outdoor heat exchanger 23, but common fins are fixed to the front and rear refrigerant pipes 2. Also good. That is, the fins juxtaposed in the direction in which the refrigerant pipe 2 extends may be fixed across the front and rear refrigerant pipes 2, respectively.

本発明によると、暖房運転及び除霜運転を行う空気調和機に利用することができる。   According to this invention, it can utilize for the air conditioner which performs heating operation and defrost operation.

１ 空気調和機
２ 冷媒管
１０ 室内機
１３ 室内熱交換器
１５ 室内ファン
２０ 室外機
２１ 圧縮機
２２ 四方弁
２３ 室外熱交換器
２４ 膨張弁
２５ 室外ファン
２６ ヒートパイプ
２９ 底板
３０ フィン
３１、３２ 導水部 DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Refrigerant pipe 10 Indoor unit 13 Indoor heat exchanger 15 Indoor fan 20 Outdoor unit 21 Compressor 22 Four-way valve 23 Outdoor heat exchanger 24 Expansion valve 25 Outdoor fan 26 Heat pipe 29 Bottom plate 30 Fin 31, 32 Water guide part

Claims (6)

冷凍サイクルを運転する圧縮機と、室内の空気と熱交換を行う室内熱交換機と、室外の空気と熱交換を行う室外熱交換器とを備え、前記圧縮機の駆動により冷凍サイクルの高温部を前記室内熱交換器として低温部を前記室外熱交換器とする暖房運転を行うとともに、前記暖房運転時と逆方向に冷媒を流通させて冷凍サイクルの高温部となる前記室外熱交換器を除霜する除霜運転を行う空気調和機において、前記室外熱交換器は冷媒管に多数のフィンを近接して固着するとともに前記フィン間を気流が通過して熱交換を行い、前記除霜運転時に前記フィンの気流通過方向の一端側を流下する除霜水を受けて他端側に導く導水部を前記室外熱交換器の下端に設けたことを特徴とする空気調和機。   A compressor for operating the refrigeration cycle; an indoor heat exchanger for exchanging heat with indoor air; and an outdoor heat exchanger for exchanging heat with outdoor air. The indoor heat exchanger performs a heating operation in which a low-temperature portion is the outdoor heat exchanger, and defrosts the outdoor heat exchanger that becomes a high-temperature portion of a refrigeration cycle by circulating a refrigerant in a direction opposite to that in the heating operation. In the air conditioner that performs a defrosting operation, the outdoor heat exchanger fixes a large number of fins close to a refrigerant pipe and performs heat exchange by passing an airflow between the fins. An air conditioner characterized in that a water guide portion that receives defrost water flowing down one end side in the airflow passage direction of the fin and guides it to the other end side is provided at the lower end of the outdoor heat exchanger. 前記導水部が前記フィンの下端に接して前記フィンの並設方向に延びた断面Ｌ字状の板状部材から成ることを特徴とする請求項１に記載の空気調和機。   2. The air conditioner according to claim 1, wherein the water guide portion is formed of a plate-like member having an L-shaped cross section that is in contact with a lower end of the fin and extends in a parallel arrangement direction of the fins. 前記導水部が前記フィンの下面を含むコーナー部を折曲して形成される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 the water guide portion is formed by bending a corner portion including a lower surface of the fin. 前記冷媒管を気流通過方向に複数列設けて千鳥状に配置し、気流通過方向の一端側に配した前記冷媒管の下端が他端側に配した前記冷媒管の下端よりも上方に配されることを特徴とする請求項２または請求項３に記載の空気調和機。   The refrigerant pipes are arranged in a staggered manner in a plurality of rows in the airflow passage direction, and the lower end of the refrigerant pipe arranged on one end side in the airflow passage direction is arranged above the lower end of the refrigerant pipe arranged on the other end side. The air conditioner according to claim 2 or claim 3, wherein 前記室外熱交換器は前記暖房運転時の気流通過方向の下流側に前記導水部が設けられることを特徴とする請求項１〜請求項４のいずれかに記載の空気調和機。   The air conditioner according to any one of claims 1 to 4, wherein the outdoor heat exchanger is provided with the water guide portion on the downstream side in the airflow passage direction during the heating operation. 前記暖房運転時に冷凍サイクルの高温部に配される冷媒管を前記室外熱交換器の下方に配したことを特徴とする請求項１〜請求項５のいずれかに記載の空気調和機。   The air conditioner according to any one of claims 1 to 5, wherein a refrigerant pipe disposed in a high-temperature part of the refrigeration cycle during the heating operation is disposed below the outdoor heat exchanger.
JP2010240896A 2010-10-27 2010-10-27 Air conditioner Active JP5592233B2 (en)

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US13/819,869 US20130205823A1 (en) 2010-10-27 2011-09-15 Air conditioner
SE1350502A SE538070C2 (en) 2010-10-27 2011-09-15 Air conditioner including flanges with water conductor part
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WO2012056824A1 (en) 2012-05-03
US20130205823A1 (en) 2013-08-15

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