JP5283753B2 - Air conditioner indoor unit - Google Patents

Air conditioner indoor unit Download PDF

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JP5283753B2
JP5283753B2 JP2011521761A JP2011521761A JP5283753B2 JP 5283753 B2 JP5283753 B2 JP 5283753B2 JP 2011521761 A JP2011521761 A JP 2011521761A JP 2011521761 A JP2011521761 A JP 2011521761A JP 5283753 B2 JP5283753 B2 JP 5283753B2
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air
heat exchanger
back plate
air passage
main body
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JPWO2011004498A1 (en
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明広 後藤
小林　　孝
大輔 杉山
誠司 平川
紘一 梅津
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Mitsubishi Electric Corp
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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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Air-Flow Control Members (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)

Description

本発明は、空気調和装置の室内機において、室内機本体内の風路部での結露を防止する構造に関する。   The present invention relates to a structure for preventing dew condensation in an air passage portion in an indoor unit body in an indoor unit of an air conditioner.

例えば、部屋の温度等や湿度を調節する空気調和装置の室内機において、室内機の熱交換器に発生した結露水が室内機の風路壁の壁面に付着して風路壁を冷却し、風路壁に結露が生じることがあった。この結露を生じさせないために、従来、特許文献１に開示されたように風路壁の排水路近傍を２重構造にしたり、また特許文献２に開示されたように排水路を傾斜させて結露水の滞留を防ぐ構造が提案されている。また、特許文献３に開示されたように筐体の肉厚を厚くして断熱性を高めて結露を防止する構造や、特許文献４に開示されたように結露する部分の背面に発砲スチロールなどの断熱材を貼り付ける構造、および結露する部分の背面に中空構造を設けて断熱する構造が提案されている。   For example, in an indoor unit of an air conditioner that adjusts the temperature and humidity of a room, the condensed water generated in the heat exchanger of the indoor unit adheres to the wall surface of the indoor unit's air channel wall to cool the air channel wall, Condensation may occur on the air channel wall. In order to prevent this dew condensation, conventionally, as disclosed in Patent Document 1, the vicinity of the drainage channel of the air channel wall has a double structure, or as disclosed in Patent Document 2, the drainage channel is inclined to form dew condensation. A structure for preventing water retention has been proposed. Further, as disclosed in Patent Document 3, the thickness of the casing is increased to increase the heat insulating property to prevent condensation, and as disclosed in Patent Document 4, foaming polystyrene is provided on the back surface of the portion where condensation occurs. A structure in which a heat insulating material is affixed and a structure in which a hollow structure is provided on the back surface of a portion to be condensed are proposed.

特開平１０−１０３７０６号公報JP-A-10-103706 特開２０００−１６１７０５号公報JP 2000-161705 A 特開２００１−０８２７９１号公報JP 2001/082791 A 特開平１１−１５９７９１号公報Japanese Patent Laid-Open No. 11-159791

しかしながら、上記従来の技術は、熱交換器で発生する結露水により風路壁が冷却されることに対し、断熱材などを使って断熱性を高めることで結露を防止する構造であるため、部品点数が増え製造コストが増大する等の問題があった。   However, the conventional technology described above is a structure that prevents condensation by increasing heat insulation using a heat insulating material, etc., while the air passage wall is cooled by the dew condensation water generated in the heat exchanger. There was a problem that the number of points increased and the manufacturing cost increased.

本発明は、上記に鑑みてなされたものであって、風路壁の壁面に生じる結露に対して、断熱材等を使わずに製造コストが増大することなく結露の発生を抑制することを目的とする。   The present invention has been made in view of the above, and an object of the present invention is to suppress the occurrence of condensation without increasing the manufacturing cost without using a heat insulating material or the like for the condensation occurring on the wall surface of the air passage wall. And

上述した課題を解決し、目的を達成するために、本発明は、空気調和装置の室内機の風路壁面の結露を防止するための、室内機の構造であり、熱交換器と、熱交換器を収納するとともに空気取入口から熱交換器に至る吸込風路、及び熱交換器から空気吹出口に至る吹出風路が形成された本体箱体と、吹出風路に設けられて、空気取入口から取り込んだ空気を熱交換器を通過させたのち、空気吹出口から吹き出す送風機とを備えた空気調和装置の室内機において、複数の熱交換器は、本体箱体内の上部寄りに送風機に対向して配置され下端が本体箱体の背面寄りに配置された背面熱交換器を含み、本体箱体の背面寄りに、吹出風路の背面側風路壁を構成する背面板が設けられており、熱交換器を通過する前の空気、或いは本体箱体外部の空気の熱を、背面板に伝達する熱伝達手段が、本体箱体に設けられていることを特徴とする。   In order to solve the above-described problems and achieve the object, the present invention is an indoor unit structure for preventing dew condensation on the air passage wall surface of an indoor unit of an air conditioner. And a main body box body in which a suction air passage from the air intake to the heat exchanger and a blow-off air passage from the heat exchanger to the air outlet are formed, and the air intake In the indoor unit of an air conditioner equipped with a blower that blows out air from the inlet through the heat exchanger and then blows out from the air outlet, the multiple heat exchangers face the blower near the top in the main body box The rear plate is arranged near the back of the main body box, and the back plate constituting the back side air passage wall of the blowout air passage is provided near the back of the main body box. , Air before passing through the heat exchanger, or air outside the body box The heat transfer means for transferring the back plate, characterized in that provided in the main box body.

本発明にかかる空気調和装置の室内機によれば、本体箱体の背面寄りに、吹出風路の背面側風路壁を構成する背面板が設けられており、熱伝達手段は、この背面板に対して、熱交換器を通過する前の空気、或いは本体箱体外部の空気の熱を伝達するので、吹出風路の冷やされすぎを緩和して、断熱材等を使わずに製造コストが増大することなく風路壁面の結露の発生を抑制することができるという効果を奏する。   According to the indoor unit of the air conditioner according to the present invention, the back plate constituting the back side air passage wall of the blowing air passage is provided near the back of the main body box, and the heat transfer means is the back plate. On the other hand, since the heat of the air before passing through the heat exchanger or the air outside the main body box is transmitted, the cooling of the blowout air passage is alleviated and the manufacturing cost is reduced without using a heat insulating material or the like. There exists an effect that generation | occurrence | production of the dew condensation of a wind path wall surface can be suppressed, without increasing.

図１は、この発明の実施の形態１にかかる空気調和装置の室内機の縦断面図である。1 is a longitudinal sectional view of an indoor unit of an air-conditioning apparatus according to Embodiment 1 of the present invention. 図２は、図１のＡ部分を拡大して示す拡大断面図である。FIG. 2 is an enlarged cross-sectional view showing an A portion of FIG. 図３は、比較のために示す従来の空気調和装置の室内機の図１のＡ部分に相当する部分の拡大断面図である。FIG. 3 is an enlarged cross-sectional view of a portion corresponding to a portion A of FIG. 1 of an indoor unit of a conventional air conditioner shown for comparison. 図４は、この発明の実施の形態２にかかる空気調和装置の室内機の拡大断面図である。FIG. 4 is an enlarged cross-sectional view of the indoor unit of the air-conditioning apparatus according to Embodiment 2 of the present invention. 図５−１は、この発明の実施の形態３にかかる空気調和装置の室内機の拡大断面図である。FIGS. 5-1 is an expanded sectional view of the indoor unit of the air conditioning apparatus concerning Embodiment 3 of this invention. FIGS. 図５−２は、この発明の実施の形態３の第１の変形例を示す拡大断面図である。FIG. 5-2 is an enlarged sectional view showing a first modification of the third embodiment of the present invention. 図５−３は、この発明の実施の形態３の第２の変形例を示す拡大断面図である。FIG. 5-3 is an enlarged cross-sectional view showing a second modification of Embodiment 3 of the present invention. 図６は、この発明の実施の形態４にかかる空気調和装置の室内機の拡大断面図である。FIG. 6 is an enlarged cross-sectional view of an indoor unit of an air-conditioning apparatus according to Embodiment 4 of the present invention. 図７−１は、この発明の実施の形態１と実施の形態３の構造を組み合わせた例を示す拡大断面図である。FIGS. 7-1 is an expanded sectional view which shows the example which combined the structure of Embodiment 1 and Embodiment 3 of this invention. 図７−２は、この発明の実施の形態１と実施の形態３の第１の変形例とを組み合わせた例を示す拡大断面図である。FIG. 7-2 is an enlarged cross-sectional view showing an example in which the first embodiment of the present invention and the first modification of the third embodiment are combined. 図７−３は、この発明の実施の形態１と実施の形態３の第２の変形例とを組み合わせた例を示す拡大断面図である。FIG. 7-3 is an enlarged cross-sectional view showing an example in which the first embodiment of the present invention and the second modification of the third embodiment are combined. 図８は、この発明の実施の形態２と実施の形態３の構造とを組み合わせた例を示す拡大断面図である。FIG. 8 is an enlarged sectional view showing an example in which the structures of the second embodiment and the third embodiment of the present invention are combined. 図９は、この発明の実施の形態１と実施の形態４の構造とを組み合わせた例を示す拡大断面図である。FIG. 9 is an enlarged cross-sectional view showing an example in which the structures of Embodiment 1 and Embodiment 4 of the present invention are combined. 図１０は、この発明の実施の形態２と実施の形態４の構造とを組み合わせた例を示す拡大断面図である。FIG. 10 is an enlarged sectional view showing an example in which the structures of the second embodiment and the fourth embodiment of the present invention are combined.

以下に、本発明にかかる空気調和装置の室内機の実施の形態を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。   Embodiments of an indoor unit of an air conditioner according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

実施の形態１．
はじめに、空気調和装置の室内機の全体的な構造について説明する。図１は、この発明の実施の形態１にかかる空気調和装置の室内機の縦断面図である。図２は、図１のＡ部分を拡大して示す拡大図である。本実施の形態の室内機は、送風機４と、熱交換器（前面側熱交換器３、背面側熱交換器８）と、送風機４及び熱交換器３，８を収納する本体箱体１とを有している。Embodiment 1 FIG.
First, the overall structure of the indoor unit of the air conditioner will be described. 1 is a longitudinal sectional view of an indoor unit of an air-conditioning apparatus according to Embodiment 1 of the present invention. FIG. 2 is an enlarged view showing an A portion of FIG. The indoor unit of the present embodiment includes a blower 4, a heat exchanger (a front-side heat exchanger 3, a rear-side heat exchanger 8), a main body box 1 that houses the blower 4 and the heat exchangers 3 and 8. have.

送風機４は図１に示す断面において、本体箱体１のほぼ中央よりに配置されている。熱交換器は、送風機４を囲むように配置され前面側熱交換器３及び背面側熱交換器８からなる。前面側熱交換器３及び背面側熱交換器８は、図示しない熱源機（室外機）と配管により接続されており、この熱源機から供給された冷媒が内部を循環する。   The blower 4 is disposed substantially from the center of the main body box 1 in the cross section shown in FIG. The heat exchanger is arranged so as to surround the blower 4 and includes a front side heat exchanger 3 and a back side heat exchanger 8. The front side heat exchanger 3 and the back side heat exchanger 8 are connected to a heat source unit (outdoor unit) (not shown) by piping, and the refrigerant supplied from the heat source unit circulates inside.

本体箱体１の内部には、空気取入口１９から前面側熱交換器３及び背面側熱交換器８に至る吸込風路１７と、前面側熱交換器３及び背面側熱交換器８から空気吹出口２０に至る吹出風路１８が形成されている。送風機４は、円筒状の多翼ファンを有するシロッコファン型の送風機であり、中央部から吸い込んだ空気を遠心力により周囲に吹き出す。送風機４は、吹出風路１８に設けられて、空気取入口１９から取り込んだ空気を熱交換器を通過させたのち、空気吹出口２０から吹き出す。冷房運転及び除湿運転時においては、空気取入口１９から取り込まれた空気は、前面側熱交換器３及び背面側熱交換器８にて冷却されて、空気吹出口２０から吹き出す。   Inside the main body box 1, air is introduced from the air intake port 19 to the front side heat exchanger 3 and the rear side heat exchanger 8, and from the front side heat exchanger 3 and the rear side heat exchanger 8. A blowout air passage 18 reaching the air outlet 20 is formed. The blower 4 is a sirocco fan type blower having a cylindrical multi-blade fan, and blows out air sucked from a central portion to the periphery by centrifugal force. The blower 4 is provided in the blowout air passage 18 and blows out the air taken in from the air intake port 19 from the air blower outlet 20 after passing through the heat exchanger. During the cooling operation and the dehumidifying operation, the air taken in from the air intake port 19 is cooled by the front side heat exchanger 3 and the back side heat exchanger 8 and blown out from the air outlet 20.

空気取入口１９には、ほこり等を取り除くフィルタ７が設置されている。また、空気吹出口２０には、風向きを左右に切り替える左右風向ベーン５や、風向きを上下方向に切り替える上下風向フラップ６が設けられている。   A filter 7 that removes dust and the like is installed at the air intake 19. Further, the air outlet 20 is provided with a left and right wind direction vane 5 that switches the wind direction to the left and right and an up and down wind direction flap 6 that switches the wind direction to the up and down direction.

前面側熱交換器３は、本体箱体１の内部の前面寄り（部屋の内部寄り）の位置で送風機４に対向して配置されている。一方、背面側熱交換器８は、本体箱体１の内部の上部寄りの位置で送風機４に対向して配置され下端が本体箱体１の背面寄り（部屋の壁寄り）に位置している。   The front-side heat exchanger 3 is disposed to face the blower 4 at a position closer to the front surface (closer to the interior of the room) inside the main body box 1. On the other hand, the back-side heat exchanger 8 is disposed facing the blower 4 at a position near the upper part inside the main body box 1, and the lower end is located near the back of the main body box 1 (close to the wall of the room). .

また、本体箱体１の背面寄りに、吹出風路１８の背面側風路壁を構成する背面板１１が設けられている。背面板１１は、背面側熱交換器８の下端の下方に位置している。そして、本実施の形態においては、吸込風路１７が延長されて背面板１１の裏面まで延びる延長風路２１が形成されている（図２）。延長風路２１は、背面側熱交換器８の下端に設けられた断熱材１０と本体箱体１の裏面壁面１ａとの間に設けられており、背面板１１の裏面１１ａを含めて形成されている。この延長風路２１は、吸込風路１７と連通しており、熱交換器（前面側熱交換器３、背面側熱交換器８）を通過する前の暖気を図２に破線矢印Ｃで示すように背面板１１の裏面１１ａまで導き、この暖気を背面板１１の裏面に接触させる。すなわち、延長風路２１は、熱交換器（前面側熱交換器３、背面側熱交換器８）を通過する前の空気の熱を、背面板１１に伝達する熱伝達手段を構成している。   Further, a back plate 11 constituting a back side air passage wall of the blowing air passage 18 is provided near the back of the main body box 1. The back plate 11 is located below the lower end of the back side heat exchanger 8. And in this Embodiment, the suction air path 17 is extended and the extended air path 21 extended to the back surface of the backplate 11 is formed (FIG. 2). The extension air passage 21 is provided between the heat insulating material 10 provided at the lower end of the back surface side heat exchanger 8 and the back wall surface 1 a of the main body box 1, and is formed including the back surface 11 a of the back plate 11. ing. The extended air passage 21 communicates with the suction air passage 17, and the warm air before passing through the heat exchangers (the front-side heat exchanger 3 and the rear-side heat exchanger 8) is indicated by a dashed arrow C in FIG. In this way, the warm air is brought into contact with the back surface of the back plate 11. That is, the extended air passage 21 constitutes a heat transfer means for transmitting the heat of the air before passing through the heat exchanger (the front side heat exchanger 3 and the back side heat exchanger 8) to the back plate 11. .

図３は、比較のために示す従来の空気調和装置の室内機の図２に相当する部分の拡大図である。従来、背面側熱交換器８に発生した温度の低い結露水が背面板１１に伝わり、これが原因で背面板１１が想定以上に冷やされ、吹出風路１８に結露が発生するという問題があった。そのため、従来、背面板１１の裏面に排水路１２等を設けるなどの対策が取られていたが十分な効果を得られるものではなかった。   FIG. 3 is an enlarged view of a portion corresponding to FIG. 2 of the indoor unit of the conventional air conditioner shown for comparison. Conventionally, the low-temperature dew condensation water generated in the back-side heat exchanger 8 is transmitted to the back plate 11, which causes the back plate 11 to be cooled more than expected, and there is a problem that dew condensation occurs in the blowing air passage 18. . For this reason, measures such as providing a drainage channel 12 or the like on the back surface of the back plate 11 have been conventionally taken, but sufficient effects cannot be obtained.

本実施の形態においては、吸込風路１７の一部が延長されて背面板１１の裏面まで延びる延長風路２１が形成されており、この延長風路２１は、背面板１１の裏面を含めて形成され、この延長風路２１によって熱交換器（前面側熱交換器３、背面側熱交換器８）を通過する前の暖気が背面板１１の裏面に導かれ、この導かれた暖気が背面板１１の裏面に接触するので、背面板１１が冷やされ過ぎることがなく吹出風路１８に結露が発生することが抑制される。   In the present embodiment, a part of the suction air passage 17 is extended to form an extended air passage 21 that extends to the back surface of the back plate 11, and this extended air passage 21 includes the back surface of the back plate 11. The warm air before passing through the heat exchangers (the front side heat exchanger 3 and the back side heat exchanger 8) is guided to the back surface of the back plate 11 by the extended air passage 21, and the guided warm air is Since it contacts the back surface of the face plate 11, it is suppressed that the back plate 11 is not cooled too much and the dew condensation is generated in the blowing air passage 18.

実施の形態２．
図４は、この発明の実施の形態２にかかる空気調和装置の室内機の断面図である。本実施の形態においては、実施の形態１の延長風路２１に替えて、外気（室内機の本体箱体１の外部の空気）の熱を背面板１１に伝達する外気導入凹部２２が設けられている。外気導入凹部２２は、本体箱体１の裏面壁面１ｂが本体箱体１の内部側に深く断面Ｖ字状に後退する（凹む）ことで形成されている。外気導入凹部２２は、背面板１１の裏面を含めて形成され、本体箱体外部空間と連通し、外気を背面板１１の裏面１１ａに直接接触させる。すなわち、外気導入凹部２２は、外気の熱を背面板１１に伝達する熱伝達手段を構成している。本実施の形態においては、通常、背面側熱交換器８に発生する結露水よりも温度の高い外気が、背面板１１の裏面１１ａに直接接触するので、背面板１１が暖められ、冷やされ過ぎることがなく吹出風路１８に結露が発生しない。Embodiment 2. FIG.
FIG. 4 is a cross-sectional view of the indoor unit of the air-conditioning apparatus according to Embodiment 2 of the present invention. In the present embodiment, in place of the extended air passage 21 of the first embodiment, an outside air introduction recess 22 that transmits heat of outside air (air outside the main body box 1 of the indoor unit) to the back plate 11 is provided. ing. The outside air introduction recess 22 is formed by the back wall 1b of the main body box 1 being deeply recessed (recessed) into a V-shaped cross section on the inner side of the main body box 1. The outside air introduction recess 22 is formed including the back surface of the back plate 11, communicates with the main body box external space, and directly contacts the outside air with the back surface 11 a of the back plate 11. That is, the outside air introduction recess 22 constitutes a heat transfer means for transferring the heat of outside air to the back plate 11. In the present embodiment, the outside air having a temperature higher than the dew condensation water generated in the back side heat exchanger 8 is usually in direct contact with the back surface 11a of the back plate 11, so that the back plate 11 is warmed and cooled too much. There is no condensation and no condensation occurs in the blowout air passage 18.

実施の形態３．
図５−１は、この発明の実施の形態３にかかる空気調和装置の室内機の拡大断面図である。本実施の形態においては、背面板１１の熱伝導性を向上させる目的で、背面板１１の裏面（外側）に、熱伝導性促進部材として金属板２３Ａが貼着されている。詳細には、金属板２３Ａは、背面板１１に本体箱体１の裏面壁面１ａが接合した部分の角部の外側に、両主面にかかるように折れて貼着されている。金属板２３Ａの材料は、例えば銅などの熱伝導性に優れた材料でなり、外気に接触れるよう少なくとも一部が本体箱体１の外気に露呈するので、外気の熱を良く吸収して背面板１１に伝達する。これにより、吹出風路１８の結露発生が緩和される。なお、金属板２３Ａを本体箱体１の外気に露呈する部分と背面板１１との間に架け渡すように設けることにより、外気の熱を背面板１１に伝達することができ効果的である。Embodiment 3 FIG.
FIGS. 5-1 is an expanded sectional view of the indoor unit of the air conditioning apparatus concerning Embodiment 3 of this invention. FIGS. In the present embodiment, for the purpose of improving the thermal conductivity of the back plate 11, a metal plate 23A is attached to the back surface (outside) of the back plate 11 as a thermal conductivity promoting member. Specifically, the metal plate 23 </ b> A is folded and attached to the outer side of the corner portion where the back surface wall 1 a of the main body box 1 is joined to the back plate 11 so as to cover both main surfaces. The material of the metal plate 23A is, for example, a material having excellent thermal conductivity such as copper, and at least a part thereof is exposed to the outside air of the main body box 1 so as to be in contact with the outside air. It is transmitted to the face plate 11. Thereby, the dew condensation generation | occurrence | production of the blowing wind path 18 is relieved. In addition, by providing the metal plate 23A so as to be bridged between the portion exposed to the outside air of the main body box 1 and the back plate 11, heat of the outside air can be transmitted to the back plate 11, which is effective.

図５−２は、この発明の実施の形態３の第１の変形例を示す拡大断面図である。この例では、熱伝導性促進部材である金属板２３Ｂは、背面板１１の内面（吹出風路１８側）１１ｂに貼着されている。このような構成の金属板２３Ｂにおいては、背面板１１の伝熱能力を向上させるので、背面板１１の一部において、極端に温度が下がってしまうことが緩和され、吹出風路１８の結露発生が抑制される。なお、金属板２３Ｂは、背面板１１の比較的温度が下がらない部分（裏面が外気に接触する部分）と、背面側熱交換器８に発生する結露水により温度が低くなる部分とを跨ぐように配設されると効果的である。   FIG. 5-2 is an enlarged sectional view showing a first modification of the third embodiment of the present invention. In this example, the metal plate 23 </ b> B, which is a thermal conductivity promoting member, is attached to the inner surface (blow air passage 18 side) 11 b of the back plate 11. In the metal plate 23 </ b> B having such a configuration, the heat transfer capability of the back plate 11 is improved, so that the temperature of the back plate 11 is partly reduced and the condensation of the blowout air path 18 is reduced. Is suppressed. Note that the metal plate 23B straddles the portion of the back plate 11 where the temperature is not lowered (the portion where the back surface is in contact with the outside air) and the portion where the temperature is lowered by the condensed water generated in the back side heat exchanger 8. It is effective if it is disposed.

図５−３は、この発明の実施の形態３の第２の変形例を示す拡大断面図である。熱伝導性促進部材である金属板２３Ｃは、背面板１１の内部に埋めこまれて配設されている。このような構成の金属板２３Ｃにおいても、図５−２のものと概略同様な効果が得られる他、金属板２３Ｃが背面板１１の内部に埋めこまれて配設されているので、腐食しづらく耐久性が向上する。   FIG. 5-3 is an enlarged cross-sectional view showing a second modification of Embodiment 3 of the present invention. The metal plate 23 </ b> C that is a thermal conductivity promoting member is embedded in the back plate 11 and disposed. In the metal plate 23C having such a configuration, effects similar to those of FIG. 5-2 can be obtained, and the metal plate 23C is embedded in the back plate 11 and thus corroded. Durability is improved.

なお、熱伝導性促進部材としては、金属板に限らず、例えば金属箔のような薄い部材の一方の面に熱伝導率の高い接着剤を塗布してなるテープ状の部材（金属テープ）でもよい。   In addition, as a heat conductivity promotion member, not only a metal plate but the tape-shaped member (metal tape) formed by apply | coating the adhesive with high heat conductivity to one side of thin members, such as metal foil, for example Good.

実施の形態４．
図６は、この発明の実施の形態４にかかる空気調和装置の室内機の拡大断面図である。本実施の形態においては、熱伝達手段として、背面板１１の裏面に板形状部材２４が立設されている。板形状部材２４は熱伝導性に優れた材料で作製されており、外部空気に晒されているので、板形状部材２４を介して外気の熱が背面板１１に良好に伝達され、背面板１１が冷やされ過ぎることがなく吹出風路１８に結露が発生しない。板形状部材２４は、例えば熱伝導率の高い接着剤などで固着される。なお、板形状部材２４の材料は、背面板１１の材料より熱伝導率が高い材料であれば、所定の効果を得ることができる。Embodiment 4 FIG.
FIG. 6 is an enlarged cross-sectional view of an indoor unit of an air-conditioning apparatus according to Embodiment 4 of the present invention. In the present embodiment, a plate-shaped member 24 is erected on the back surface of the back plate 11 as heat transfer means. Since the plate-shaped member 24 is made of a material having excellent heat conductivity and is exposed to external air, the heat of the outside air is well transmitted to the back plate 11 via the plate-shaped member 24, and the back plate 11 Is not cooled too much and no condensation occurs in the blowout air passage 18. The plate-shaped member 24 is fixed by, for example, an adhesive having a high thermal conductivity. In addition, if the material of the plate-shaped member 24 has a higher thermal conductivity than the material of the back plate 11, a predetermined effect can be obtained.

なお、上記実施の形態１〜４は、互いに組み合わせることができる。図７−１は、この発明の実施の形態１と実施の形態３の構造を組み合わせた例を示す拡大断面図である。室内機には、背面板１１の裏面まで延び、熱交換器を通過する前の空気の熱を背面板１１に伝達する熱伝達手段として働く延長風路２１と、熱伝導性促進部材である金属板２３Ａとが設けられている。図７−２は、この発明の実施の形態１と実施の形態３の第１の変形例とを組み合わせた例を示す拡大断面図である。室内機には、同じく熱伝達手段として働く延長風路２１と、熱伝導性促進部材である金属板２３Ｂとが設けられている。図７−３は、この発明の実施の形態１と実施の形態３の第２の変形例とを組み合わせた例を示す拡大断面図である。同じく熱伝達手段として働く延長風路２１と、熱伝導性促進部材である金属板２３Ｃとが設けられている。   Note that Embodiments 1 to 4 can be combined with each other. FIGS. 7-1 is an expanded sectional view which shows the example which combined the structure of Embodiment 1 and Embodiment 3 of this invention. The indoor unit extends to the back surface of the back plate 11 and has an extended air passage 21 that serves as a heat transfer means for transmitting the heat of the air before passing through the heat exchanger to the back plate 11 and a metal that is a heat conductivity promoting member. A plate 23A is provided. FIG. 7-2 is an enlarged cross-sectional view showing an example in which the first embodiment of the present invention and the first modification of the third embodiment are combined. The indoor unit is provided with an extended air passage 21 that also functions as a heat transfer means, and a metal plate 23B that is a thermal conductivity promoting member. FIG. 7-3 is an enlarged cross-sectional view showing an example in which the first embodiment of the present invention and the second modification of the third embodiment are combined. Similarly, an extended air passage 21 serving as a heat transfer means and a metal plate 23C which is a heat conductivity promoting member are provided.

図８は、この発明の実施の形態２と実施の形態３の構造とを組み合わせた例を示す拡大断面図である。室内機には、外気の熱を背面板１１に伝達する熱伝達手段として働く外気導入凹部２２と、熱伝導性促進部材である金属板２３Ａとが設けられている。図９は、この発明の実施の形態１と実施の形態４の構造とを組み合わせた例を示す拡大断面図である。室内機には、背面板１１の裏面まで延び、熱交換器を通過する前の空気の熱を背面板１１に伝達する熱伝達手段として働く延長風路２１と、背面板１１の裏面に立設されて外気の熱を背面板１１に伝達する熱伝達手段として働く板形状部材２４とが設けられている。図１０は、この発明の実施の形態２と実施の形態４の構造とを組み合わせた例を示す拡大断面図である。室内機には、外気の熱を背面板１１に伝達する熱伝達手段として働く外気導入凹部２２と、背面板１１の裏面に立設されて外気の熱を背面板１１に伝達する熱伝達手段として働く板形状部材２４とが設けられている。これらの例は、それぞれ組み合わされた各実施の形態の効果を合わせ持つ他、組み合わすことによる相乗効果により、各々の効果を加えたものよりも優れた効果を得ることができる。   FIG. 8 is an enlarged sectional view showing an example in which the structures of the second embodiment and the third embodiment of the present invention are combined. The indoor unit is provided with an outside air introduction recess 22 that functions as a heat transfer means for transferring the heat of the outside air to the back plate 11, and a metal plate 23A that is a heat conductivity promoting member. FIG. 9 is an enlarged cross-sectional view showing an example in which the structures of Embodiment 1 and Embodiment 4 of the present invention are combined. The indoor unit extends to the back surface of the back plate 11 and is extended to the back surface of the back plate 11 and an extended air passage 21 that functions as a heat transfer means for transferring the heat of the air before passing through the heat exchanger to the back plate 11. In addition, a plate-shaped member 24 serving as a heat transfer means for transferring the heat of the outside air to the back plate 11 is provided. FIG. 10 is an enlarged sectional view showing an example in which the structures of the second embodiment and the fourth embodiment of the present invention are combined. The indoor unit has an outside air introduction recess 22 that functions as a heat transfer means for transferring the heat of the outside air to the back plate 11, and a heat transfer means that stands on the back surface of the back plate 11 and transfers the heat of the outside air to the back plate 11. A working plate-shaped member 24 is provided. In addition to the effects of the combined embodiments, these examples can obtain effects superior to those obtained by adding the effects due to the synergistic effect of the combination.

以上のように、本発明にかかる空気調和装置の室内機は、本体箱体内の上部寄りに配置され下端が本体箱体の背面寄りに位置する背面熱交換器を有し、本体箱体の背面寄りに吹出風路の背面側風路壁を構成する背面板を有する空気調和装置の室内機に適用されて有用なものである。   As described above, the indoor unit of the air conditioner according to the present invention has a rear heat exchanger that is disposed near the upper part in the main body box and whose lower end is located near the rear surface of the main body box, and the rear surface of the main body box. The present invention is useful when applied to an indoor unit of an air conditioner having a back plate that constitutes a back side air passage wall of the blowout air passage.

１ 本体箱体
３ 前面側熱交換器
４ 送風機
５ 左右風向ベーン
６ 上下風向フラップ
７ フィルタ
８ 背面側熱交換器
１０ 断熱材
１１ 背面板
１２ 排水路
１７ 吸込風路
１８ 吹出風路
１９ 空気取入口
２０ 空気吹出口
２１ 延長風路（熱伝達手段）
２２ 外気導入凹部（熱伝達手段）
２３ 金属板（熱伝導性促進部材）
２４ 板形状部材（熱伝達手段）DESCRIPTION OF SYMBOLS 1 Main body box 3 Front side heat exchanger 4 Blower 5 Left and right wind direction vane 6 Vertical wind direction flap 7 Filter 8 Back side heat exchanger 10 Heat insulating material 11 Back plate 12 Drainage path 17 Suction air path 18 Blow air path 19 Air intake 20 Air outlet 21 Extended air passage (heat transfer means)
22 Outside air introduction recess (heat transfer means)
23 Metal plate (thermal conductivity promoting member)
24 Plate-shaped member (heat transfer means)

Claims (3)

内部を冷媒が循環する複数の熱交換器と、
前記熱交換器を収納するとともに空気取入口から前記熱交換器に至る吸込風路、及び前記熱交換器から空気吹出口に至る吹出風路が形成された本体箱体と、
前記吹出風路に設けられて、前記空気取入口から取り込んだ空気を前記熱交換器を通過させたのち、前記空気吹出口から吹き出す送風機とを備えた空気調和装置の室内機において、
前記複数の熱交換器は、前記本体箱体内の上部寄りに前記送風機に対向して配置され下端が前記本体箱体の背面寄りに配置された背面側熱交換器を含み、
前記本体箱体の背面寄りに、前記吹出風路の背面側風路壁を構成する背面板が設けられており、
前記熱交換器を通過する前の空気の熱を、前記背面板に伝達する熱伝達手段が、前記本体箱体に設けられており、
前記熱伝達手段は、前記本体箱体の前記背面側熱交換器と前記背面板との間に、前記背面板の裏面を含めて形成され、前記吸込風路と連通し、前記熱交換器を通過する前の空気を導いて前記背面板の裏面に接触させる延長吸込風路であり、
前記背面板の主面に重ねて貼着され、或いは前記背面板に主面に沿って埋めこまれ、前記背面板の熱伝導を促進する熱伝導性促進部材がさらに設けられている
ことを特徴とする空気調和装置の室内機。 A plurality of heat exchangers in which refrigerant circulates;
A main body box that houses the heat exchanger and has a suction air passage from an air inlet to the heat exchanger, and a blowout air passage from the heat exchanger to the air outlet,
In the indoor unit of the air conditioner provided with the blower that is provided in the blowout air passage and passes through the heat exchanger after the air taken in from the air intake port is blown out from the air blowout port.
The plurality of heat exchangers include a back side heat exchanger disposed near the upper part in the main body box so as to face the blower and having a lower end disposed near the back surface of the main body box,
Near the back surface of the main body box, a back plate constituting a back side air passage wall of the blowing air passage is provided,
Heat transfer means for transferring the heat of the air before passing through the heat exchanger to the back plate is provided in the main body box ,
The heat transfer means is formed between the back side heat exchanger and the back plate of the main body box including the back side of the back plate, communicates with the suction air passage, and the heat exchanger It is an extended suction air passage that guides the air before passing and contacts the back surface of the back plate,
It is further provided with a thermal conductivity promoting member that is stuck on the main surface of the back plate, or is embedded in the back plate along the main surface to promote heat conduction of the back plate. An air conditioner indoor unit. 前記熱伝達手段は、前記延長吸込風路に加えて、前記背面板の裏面に立設され、少なくとも一部を外気に晒し、前記本体箱体外部の空気の熱を前記背面板に伝達する板形状部材である
ことを特徴とする請求項１に記載の空気調和装置の室内機。 The heat transfer means, in addition to the extended suction air passage, is erected on the back surface of the back plate, and bleached at least a portion to the outside air, to convey the air of heat of the main box outside portion to the rear plate It is a plate-shaped member. The indoor unit of the air conditioning apparatus of Claim 1 characterized by the above-mentioned. 前記熱伝導性促進部材は、金属板或いは金属テープである
ことを特徴とする請求項１または２に記載の空気調和装置の室内機。 The indoor unit of an air conditioner according to claim 1 or 2 , wherein the thermal conductivity promoting member is a metal plate or a metal tape.
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