JP2020200967A - Outdoor unit of air conditioner - Google Patents

Outdoor unit of air conditioner Download PDF

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JP2020200967A
JP2020200967A JP2019106268A JP2019106268A JP2020200967A JP 2020200967 A JP2020200967 A JP 2020200967A JP 2019106268 A JP2019106268 A JP 2019106268A JP 2019106268 A JP2019106268 A JP 2019106268A JP 2020200967 A JP2020200967 A JP 2020200967A
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front plate
hole
upper edge
outdoor unit
outlet
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神田　聡
Satoshi Kanda
聡 神田
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Sharp Corp
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Sharp Corp
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Priority to JP2019106268A priority Critical patent/JP2020200967A/en
Priority to CN202010485915.1A priority patent/CN112050300B/en
Publication of JP2020200967A publication Critical patent/JP2020200967A/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
    • F24F1/56—Casing or covers of separate outdoor units, e.g. fan guards
    • 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
    • F24F1/08—Compressors specially adapted for separate outdoor units
    • F24F1/10—Arrangement or mounting thereof
    • 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
    • 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
    • F24F1/20—Electric components for separate outdoor units
    • F24F1/22—Arrangement or mounting thereof
    • 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
    • F24F1/26—Refrigerant piping
    • 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
    • F24F1/38—Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings
    • 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

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

Abstract

To provide an outdoor unit of an air conditioner that can take measures against icicles while keeping superiority in cost.SOLUTION: An outdoor unit of an air conditioner comprises a housing including a front plate 14 provided with a discharge port 14x, an air blower 30 housed in the housing so as to be rotatable around a rotation axis in a direction roughly orthogonal to the front plate, and a discharge grille 14b attached to the housing so as to cover the discharge port. The front plate comprises a plurality of through holes provided in a peripheral part of the discharge port. The discharge grille comprises a plurality of locking convex parts capable of being locked in the plurality of through holes respectively. The plurality of through holes include at least one upper edge through hole arranged in an upper edge of the peripheral part of the discharge port, and are constituted so as to be capable of guiding water flowing down along an outer surface of the front plate, to the side of an inner surface of the front plate through the upper edge through hole.SELECTED DRAWING: Figure 2

Description

本発明は、空気調和機の室外機に関する。 The present invention relates to an outdoor unit of an air conditioner.

従来の空気調和機の室外機として、特許文献１には、ファンを収納するケースと、ケース内のファンによって生じる気流の吹出口を形成する円筒形のベルマウスと、吹出口を覆う四角形の吹出グリルと、ケースにおける吹出口の上方に設けられた庇部材（傾斜舌部）とを備えた室外機が提案されている。 As an outdoor unit of a conventional air conditioner, Patent Document 1 describes a case for accommodating a fan, a cylindrical bell mouth forming an airflow outlet generated by the fan in the case, and a square outlet covering the outlet. An outdoor unit having a grill and an eaves member (tilted tongue) provided above the air outlet in the case has been proposed.

また、特許文献２には、吹出グリルが円形であり、かつ、ケースにおける吹出口の上方に円弧形の庇部材が設けられたこと以外は、特許文献１の室外機と概ね同様に構成された室外機が提案されている。 Further, Patent Document 2 has substantially the same configuration as the outdoor unit of Patent Document 1 except that the outlet grill is circular and an arc-shaped eaves member is provided above the outlet in the case. An outdoor unit has been proposed.

特許文献１および２の室外機において、庇部材は、雨または雪が溶けた水滴がケースの前面（外面）を伝ってベルマウスの内周面の頂部へ侵入しないようにするために設けられている。すなわち、ベルマウスの内周面の最も高い頂部（ベルマウスの中心軸線方向に延びる領域）は、頂部の周方向両側部分に比べて上下方向の傾斜が緩やかである（水平に近い）ため、吹出口の頂部へ流れた水滴はそのままベルマウスの内周面の頂部を伝って後方のファン側へ移動する場合がある。そのため、例えば、外気温が低く室外機停止中の深夜にベルマウスの内周面の頂部に付着した水滴が氷結し成長して、ファンの上方に氷柱が形成されることがある。この場合、室外機を運転すると、回転するファンが氷柱と接触して異音が発生する、氷柱によってファンの回転が妨げられる等の不具合が生じることがあるため、このような不具合を抑制するために庇部材が設けられている。 In the outdoor units of Patent Documents 1 and 2, the eaves member is provided to prevent water droplets in which rain or snow is melted from entering the top of the inner peripheral surface of the bell mouth through the front surface (outer surface) of the case. .. That is, the highest top of the inner peripheral surface of the bell mouth (the region extending in the direction of the central axis of the bell mouth) has a gentle vertical inclination (close to horizontal) as compared with both sides of the top in the circumferential direction. The water droplets that have flowed to the top of the outlet may continue to travel along the top of the inner peripheral surface of the bell mouth and move to the rear fan side. Therefore, for example, water droplets adhering to the top of the inner peripheral surface of the bell mouth may freeze and grow at midnight when the outside air temperature is low and the outdoor unit is stopped, and an icicle may be formed above the fan. In this case, when the outdoor unit is operated, problems such as the rotating fan coming into contact with the icicle and making an abnormal noise, or the icicle hindering the rotation of the fan may occur. An icicle member is provided on the.

特許第６２２３２３２号公報Japanese Patent No. 6223232 特許第５２８９２７８号公報Japanese Patent No. 5289278

特許文献１および２の場合、吹出口から吹き出される気流が庇部材に当たって抵抗となりやすいため、エネルギー効率の面から好ましいとは言えない。
また、特許文献１の吹出グリルは四角形であるため、特許文献２の円形グリルよりも大型化してコスト面で優位性が劣る。 In the cases of Patent Documents 1 and 2, the airflow blown out from the air outlet tends to hit the eaves member and become a resistance, which is not preferable from the viewpoint of energy efficiency.
Further, since the blowout grill of Patent Document 1 has a quadrangular shape, it is larger than the circular grill of Patent Document 2 and is inferior in cost.

また、特許文献２の場合、円形の吹出グリルの上方近傍位置に円弧形の庇部材を設けることにより、庇部材に沿って水滴を下方へ誘導してベルマウス内への侵入を防ぐようにしているが、次の問題がある。
すなわち、ベルマウスの中心軸線を通る重力方向の垂直線上に円弧形の庇部材の頂部が配置されるように、庇部材は円形の吹出グリルの上縁に沿って設けられるが、庇部材の頂部は上下方向の傾斜が緩やかである（水平に近い）ため、ケースの前面（外面）における前記垂直線上を流れる水滴が庇部材とケース前面との間の隙間に流れ込んでベルマウスの内周面の頂部へ移動し、ベルマウスの内周面の頂部に移動した水滴がファン上で氷柱となってしまうおそれがある。
また、このような水滴のベルマウス内への侵入を防ぐために庇部材とケース前面のクリアランスを狭くすると、室外機運転中に庇部材が振動して異音（びびり音）が発生するという別の問題が生じる。 Further, in the case of Patent Document 2, by providing an arc-shaped eaves member at a position near the upper side of the circular blow-out grill, water droplets are guided downward along the eaves member to prevent invasion into the bell mouth. However, there are the following problems.
That is, the eaves member is provided along the upper edge of the circular eaves grill so that the top of the arc-shaped eaves member is arranged on the vertical line in the direction of gravity passing through the central axis of the bell mouth. Since the top has a gentle vertical inclination (close to horizontal), water droplets flowing on the vertical line on the front surface (outer surface) of the case flow into the gap between the eaves member and the front surface of the case, and the inner peripheral surface of the bell mouth. There is a risk that water droplets that have moved to the top of the eaves and moved to the top of the inner peripheral surface of the bell mouth will become icicles on the fan.
In addition, if the clearance between the eaves member and the front of the case is narrowed in order to prevent such water droplets from entering the bell mouth, the eaves member vibrates during the operation of the outdoor unit and an abnormal noise (chattering noise) is generated. Problems arise.

本発明は、このような事情に鑑みなされた空気調和機の室外機を提供することを目的とする。 An object of the present invention is to provide an outdoor unit of an air conditioner made in view of such circumstances.

本発明によれば、吹出口が設けられた前板を有する筐体と、前記前板に略直交する方向の回転軸心を中心として回転可能に前記筐体内に収納される送風機と、前記送風機によって生じる気流を前記吹出口から外部へ吹き出すように前記前板に連設されたベルマウスと、前記吹出口を覆うように前記筐体に取り付けられる吹出グリルとを備え、
前記前板は、前記吹出口の周囲部に設けられた複数の貫通孔を有し、
前記吹出グリルは、前記複数の貫通孔にそれぞれ係止可能な複数の係止凸部を有し、
前記複数の貫通孔は、前記吹出口の周囲部の上縁に配置された少なくとも１つの上縁貫通孔を含み、前記前板の外面を伝って流れ落ちる水を前記上縁貫通孔を通して前記前板の内面側へ誘導可能に構成された空気調和機の室外機が提供される。 According to the present invention, a housing having a front plate provided with an air outlet, a blower rotatably housed in the housing about a rotation axis in a direction substantially orthogonal to the front plate, and the blower. It is provided with a bell mouth connected to the front plate so as to blow out the airflow generated by the airflow from the outlet to the outside, and an outlet grill attached to the housing so as to cover the outlet.
The front plate has a plurality of through holes provided around the outlet.
The blowout grill has a plurality of locking protrusions that can be locked to the plurality of through holes, respectively.
The plurality of through holes include at least one upper edge through hole arranged on the upper edge of the peripheral portion of the air outlet, and the water flowing down along the outer surface of the front plate is passed through the upper edge through hole to the front plate. An outdoor unit of an air conditioner configured to be guided to the inner surface side of the air conditioner is provided.

本発明によれば、ベルマウスの内周面側へ水を侵入させにくくすることができる。 According to the present invention, it is possible to prevent water from entering the inner peripheral surface side of the bell mouth.

本発明の空気調和機の室外機（第１実施形態）を示す斜視図である。It is a perspective view which shows the outdoor unit (1st Embodiment) of the air conditioner of this invention. 第１実施形態の室外機の内部構成を説明する分解図である。It is an exploded view explaining the internal structure of the outdoor unit of 1st Embodiment. 第１実施形態の室外機の正面図である。It is a front view of the outdoor unit of 1st Embodiment. 第１実施形態の室外機における前板を裏側から視た斜視図である。It is a perspective view which looked at the front plate in the outdoor unit of 1st Embodiment from the back side. 第１実施形態の室外機における前板から吹出グリルを取り外した状態を示す斜視図である。It is a perspective view which shows the state which the outlet grill was removed from the front plate in the outdoor unit of 1st Embodiment. 第１実施形態における吹出グリルを取り外した前板の正面図である。It is a front view of the front plate which removed the blow-out grill in 1st Embodiment. 第１実施形態における吹出グリルを取り外した前板を裏側から視た斜視図である。It is a perspective view which looked at the front plate which removed the blow-out grill in 1st Embodiment from the back side. 第１実施形態における吹出グリルを裏側から視た斜視図である。It is a perspective view which looked at the blow-out grill in 1st Embodiment from the back side. 図８中の一点鎖線内の領域を拡大した図である。It is an enlarged view of the region in the alternate long and short dash line in FIG. 第１実施形態の室外機における前板への吹出グリルの取付構造を説明する断面図である。It is sectional drawing explaining the attachment structure of the blow-out grille to the front plate in the outdoor unit of 1st Embodiment. 第２実施形態の室外機における吹出グリルを取り外した前板の正面図である。It is a front view of the front plate which removed the blowing grill in the outdoor unit of 2nd Embodiment. 第２実施形態の室外機における吹出グリルの頂部付近を示す斜視図である。It is a perspective view which shows the vicinity of the top of the blow-out grill in the outdoor unit of 2nd Embodiment. 第３実施形態の室外機における吹出グリルを裏側から視た斜視図である。It is a perspective view which looked at the blow-out grill in the outdoor unit of 3rd Embodiment from the back side. 図１３中の一点鎖線内の領域を拡大した図である。It is an enlarged view of the area in the alternate long and short dash line in FIG. 第３実施形態の室外機における吹出グリルの頂部付近を示す斜視図である。It is a perspective view which shows the vicinity of the top of the blow-out grill in the outdoor unit of 3rd Embodiment. 第４実施形態の室外機における前板への吹出グリルの取付構造を説明する断面図である。It is sectional drawing explaining the attachment structure of the blow-out grille to the front plate in the outdoor unit of 4th Embodiment. 吹出グリルを取り外した室外機を示す図１６の対応図である。It is a corresponding figure of FIG. 16 which shows the outdoor unit which removed the outlet grill. 第４実施形態の室外機における吹出グリルの頂部付近を裏側から視た斜視図である。FIG. 5 is a perspective view of the vicinity of the top of the outlet grill in the outdoor unit of the fourth embodiment as viewed from the back side.

（第１実施形態）
図１は本発明の空気調和機の室外機（第１実施形態）を示す斜視図であり、図２は第１実施形態の室外機の内部構成を説明する分解図である。なお、図１において、室外機の前後左右上下方向を矢印にて示している。 (First Embodiment)
FIG. 1 is a perspective view showing an outdoor unit (first embodiment) of the air conditioner of the present invention, and FIG. 2 is an exploded view illustrating an internal configuration of the outdoor unit of the first embodiment. In FIG. 1, the front-back, left-right, up-down directions of the outdoor unit are indicated by arrows.

＜室外機の全体構成＞
実施形態１の空気調和機の室外機１は、図１および図２に示すように、直方体形の筐体１０と、筐体１０内に収納された熱交換器（室外熱交換器）２０、送風機３０、圧縮機４０、配管部５０およびケース（電装ボックス）にて覆われた回路基板６０と、筐体１０の一側面に取付部材７０を介して取り付けられた第１接続部材８１および第２接続部材８２とを主たる構成要素として備える。 <Overall configuration of outdoor unit>
As shown in FIGS. 1 and 2, the outdoor unit 1 of the air conditioner of the first embodiment has a rectangular parallelepiped housing 10 and a heat exchanger (outdoor heat exchanger) 20 housed in the housing 10. The circuit board 60 covered with the blower 30, the compressor 40, the piping portion 50 and the case (electrical box), and the first connecting member 81 and the second connecting member 81 attached to one side surface of the housing 10 via the mounting member 70. A connecting member 82 is provided as a main component.

筐体１０は、底板１１、左右の側板１２、１３、前板（前パネル）１４および天板１６を有し、これらがビスにて連結して組み立てられる。
筐体１０の一側面を構成する右側板１３には、取付部材７０を取り付ける開口部が設けられると共に、樹脂製のカバー部材（バルブカバー）９１が取り付けられる。 The housing 10 has a bottom plate 11, left and right side plates 12, 13, a front plate (front panel) 14, and a top plate 16, which are connected by screws and assembled.
The right side plate 13 constituting one side surface of the housing 10 is provided with an opening for attaching the attachment member 70, and a resin cover member (valve cover) 91 is attached.

前板１４には、円形の吹出口１４ｘが設けられると共に、吹出口１４ｘに円形の吹出口グリル１４ｂが取り付けられている。
熱交換器２０は、筐体１０の左側板１２および右側板１３の内面に沿うように底板１１にて支持されると共に、配管部５０と接続されている。
なお、筐体１０において、格子状の吸気口を有する後板が設けられてもよい。 The front plate 14 is provided with a circular outlet 14x, and a circular outlet grill 14b is attached to the outlet 14x.
The heat exchanger 20 is supported by the bottom plate 11 along the inner surfaces of the left side plate 12 and the right side plate 13 of the housing 10, and is connected to the piping portion 50.
The housing 10 may be provided with a rear plate having a grid-like intake port.

また、筐体１０内には、送風機３０を収納する左側スペース（送風機スペース）と配管部５０を収納する右側スペース（配管スペース）とを区画する区画板１７が底板１１にて支持されるよう設けられている。左側スペースにおける左右の略中間位置にかつ熱交換器２０に沿って支柱板１８（モータアングル）が底板１１にて支持されるよう設けられ、電装ボックス（回路基板６０）を水平状に支持する支持板１９が支柱板１８にて支持されるよう設けられている。 Further, in the housing 10, a partition plate 17 for partitioning the left side space (blower space) for accommodating the blower 30 and the right side space (piping space) for accommodating the piping portion 50 is provided so as to be supported by the bottom plate 11. Has been done. A support plate 18 (motor angle) is provided so as to be supported by the bottom plate 11 at a substantially intermediate position between the left and right sides in the left space and along the heat exchanger 20, and a support that horizontally supports the electrical box (circuit board 60). The plate 19 is provided so as to be supported by the support plate 18.

支柱板１８は、帯形の金属プレートを型抜きし、かつ折り曲げて所定強度を有するように形成されており、その上端部および下端部が支持板１９および底板１１に連結されている。
また、支柱板１８は、上部および下部に略長方形の通風孔（不図示）を有し、上下の通風孔の間の中間部に送風機３０が取り付けられている。 The support plate 18 is formed by punching and bending a strip-shaped metal plate so as to have a predetermined strength, and the upper end portion and the lower end portion thereof are connected to the support plate 19 and the bottom plate 11.
Further, the support plate 18 has substantially rectangular ventilation holes (not shown) at the upper and lower portions, and a blower 30 is attached to an intermediate portion between the upper and lower ventilation holes.

送風機３０は、支柱板１８の中間部に固定されたモータ３０ａと、モータ３０ａの出力軸に固定された２枚羽根形のプロペラ３０ｂ（プロペラファン３０ｂ）とを有し、モータ３０ａによってプロペラ３０ｂが反時計回りに回転する。 The blower 30 has a motor 30a fixed to the intermediate portion of the support column 18 and a two-blade propeller 30b (propeller fan 30b) fixed to the output shaft of the motor 30a, and the propeller 30b is moved by the motor 30a. Rotate counterclockwise.

配管部５０は、膨張弁またはキャピラリーチューブまたはその両方を有しかつ熱交換器２０と第１接続部材８１とを接続する液体冷媒配管部と、四方弁を有し第２接続部材８２を前記四方弁を介して圧縮機４０に接続する気体冷媒配管部とを備える。
なお、第１接続部材８１としては二方弁が用いることができ、第２接続部材８２としては三方弁を用いることができる。また、第１接続部材８１および第２接続部材８２は、冷媒を流通させる渡り配管としての第１配管１０１および第２配管１０２を介して図外の室内機の熱交換器と接続される。
すなわち、圧縮機、四方弁、室外熱交換器、膨張機構（膨張弁、キャピラリーチューブ）、二方弁、第１配管、室内熱交換器、第２配管、三方弁にて冷凍サイクルが形成されている。
以下、第１接続部材８１を二方弁８１と称し、第２接続部材８２を三方弁８２と称する場合がある。 The piping section 50 has a liquid refrigerant piping section that has an expansion valve and / or a capillary tube and connects the heat exchanger 20 and the first connecting member 81, and a four-way valve that connects the second connecting member 82 to the four sides. It is provided with a gas-refrigerant piping unit connected to the compressor 40 via a valve.
A two-way valve can be used as the first connecting member 81, and a three-way valve can be used as the second connecting member 82. Further, the first connecting member 81 and the second connecting member 82 are connected to the heat exchanger of the indoor unit (not shown) via the first pipe 101 and the second pipe 102 as the crossover pipe for circulating the refrigerant.
That is, a refrigeration cycle is formed by a compressor, a four-way valve, an outdoor heat exchanger, an expansion mechanism (expansion valve, capillary tube), a two-way valve, a first pipe, an indoor heat exchanger, a second pipe, and a three-way valve. There is.
Hereinafter, the first connecting member 81 may be referred to as a two-way valve 81, and the second connecting member 82 may be referred to as a three-way valve 82.

空気調和機の運転時、室外機１においては、圧縮機４０の駆動により冷媒が循環して熱サイクル（冷凍サイクル）が運転される。この際、送風機３０を駆動することにより、回転するプロペラ３０ｂの吸引力によって外気が熱交換器２０を通過して筐体１０内に流入する。熱交換器２０を通過した外気は熱交換されて吹出口１４ｘから外部に吹き出される。 During operation of the air conditioner, in the outdoor unit 1, the refrigerant is circulated by the drive of the compressor 40 to operate the heat cycle (refrigeration cycle). At this time, by driving the blower 30, the outside air passes through the heat exchanger 20 and flows into the housing 10 due to the suction force of the rotating propeller 30b. The outside air that has passed through the heat exchanger 20 is heat-exchanged and blown out from the outlet 14x.

また、冷媒が第１配管１０１と第２配管１０２を介して室外機１と図外の室内機との間を循環し、室外機１の二方弁８１および三方弁８２のうちの一方には高温の冷媒が流れ、他方には低温の冷媒が流れる。具体的には、空気調和機の通常の冷房運転時には、圧縮機から吐出された高温高圧の気体冷媒は、四方弁を介して、室外熱交換器に流入する。室外熱交換器にて放熱し、中温高圧の液冷媒となり、膨張弁にて、低温低圧の液冷媒となる。二方弁８１に低温低圧の液冷媒が流れ、第１配管を通って、室内熱交換器に流入する。室内熱交換器にて吸熱し中温（通常、室内熱交換器に流入する液冷媒よりも高温）低圧の気体冷媒となる、気体冷媒は第２配管を通り、三方弁８２に中温の気体冷媒が流れる。気体冷媒は四方弁を介して、圧縮機に流入する。すなわち、通常の冷房運転時においては、基本的には二方弁の温度は三方弁の温度よりも低くなる。
通常の暖房運転時には圧縮機から吐出された高温高圧の冷媒は、四方弁を介して、三方弁を通る。すなわち、三方弁には、高温高圧の気体冷媒が流れる。三方弁を通った冷媒は、第２配管を通り、室内熱交換器に流入する。室内熱交換器にて放熱し、中温高圧（通常、室内熱交換器に流入する気体冷媒よりも低温）の液冷媒となり、第１配管を通って、二方弁に流入する。すなわち、二方弁には低温の液体冷媒が流れる。その後、膨張弁にて、低温低圧の液冷媒となり、室外熱交換器に流入する。室外熱交換器にて吸熱し、中温低圧の気体冷媒となり、四方弁を介して、圧縮機に流入する。すなわち、通常の暖房運転時においては、基本的には二方弁の温度は三方弁の温度よりも低くなる。
すなわち、通常の冷房運転時、通常の暖房運転時いずれにおいても、基本的には二方弁を流れる冷媒の温度は、三方弁を流れる冷媒の温度よりも低くなる。 Further, the refrigerant circulates between the outdoor unit 1 and the indoor unit (not shown) via the first pipe 101 and the second pipe 102, and is used in one of the two-way valve 81 and the three-way valve 82 of the outdoor unit 1. A high temperature refrigerant flows, and a low temperature refrigerant flows on the other side. Specifically, during the normal cooling operation of the air conditioner, the high-temperature and high-pressure gas refrigerant discharged from the compressor flows into the outdoor heat exchanger via the four-way valve. The outdoor heat exchanger dissipates heat and becomes a medium-temperature, high-pressure liquid refrigerant, and the expansion valve serves as a low-temperature, low-pressure liquid refrigerant. A low-temperature low-pressure liquid refrigerant flows through the two-way valve 81, passes through the first pipe, and flows into the indoor heat exchanger. The gas refrigerant that absorbs heat in the indoor heat exchanger and becomes a low-temperature gas refrigerant (usually higher than the liquid refrigerant that flows into the indoor heat exchanger) passes through the second pipe, and the medium-temperature gas refrigerant passes through the three-way valve 82. It flows. The gaseous refrigerant flows into the compressor via the four-way valve. That is, in the normal cooling operation, the temperature of the two-way valve is basically lower than the temperature of the three-way valve.
During normal heating operation, the high-temperature and high-pressure refrigerant discharged from the compressor passes through the three-way valve via the four-way valve. That is, a high-temperature and high-pressure gas refrigerant flows through the three-way valve. The refrigerant that has passed through the three-way valve passes through the second pipe and flows into the indoor heat exchanger. It dissipates heat in the indoor heat exchanger, becomes a liquid refrigerant at medium temperature and high pressure (usually lower than the gas refrigerant flowing into the indoor heat exchanger), and flows into the two-way valve through the first pipe. That is, a low-temperature liquid refrigerant flows through the two-way valve. After that, it becomes a low-temperature low-pressure liquid refrigerant at the expansion valve and flows into the outdoor heat exchanger. It absorbs heat in the outdoor heat exchanger, becomes a medium-temperature low-pressure gas refrigerant, and flows into the compressor via the four-way valve. That is, in the normal heating operation, the temperature of the two-way valve is basically lower than the temperature of the three-way valve.
That is, the temperature of the refrigerant flowing through the two-way valve is basically lower than the temperature of the refrigerant flowing through the three-way valve in both the normal cooling operation and the normal heating operation.

＜前板、ベルマウスおよび吹出グリルの構造＞
図３は第１実施形態の室外機の正面図であり、図４は第１実施形態の室外機における前板を裏側（後方）から視た斜視図であり、図５は第１実施形態の室外機における前板から吹出グリルを取り外した状態を示す斜視図であり、図６は第１実施形態における吹出グリルを取り外した前板の正面図である。また、図７は第１実施形態における吹出グリルを取り外した前板を裏側（後方）から視た斜視図であり、図８は第１実施形態における吹出グリルを裏側から視た斜視図であり、図９は図８中の一点鎖線内の領域を拡大した図であり、図１０は第１実施形態の室外機における前板への吹出グリルの取付構造を説明する断面図である。なお、図１０において、室外機の前後上下方向を矢印にて示している。 <Structure of front plate, bell mouth and blowout grill>
FIG. 3 is a front view of the outdoor unit of the first embodiment, FIG. 4 is a perspective view of the front plate of the outdoor unit of the first embodiment as viewed from the back side (rear), and FIG. 5 is a perspective view of the first embodiment. It is a perspective view which shows the state which the blow-out grill was removed from the front plate of an outdoor unit, and FIG. Further, FIG. 7 is a perspective view of the front plate from which the blowout grill is removed according to the first embodiment as viewed from the back side (rear side), and FIG. 8 is a perspective view of the blowout grill according to the first embodiment as viewed from the back side. FIG. 9 is an enlarged view of a region within the alternate long and short dash line in FIG. 8, and FIG. 10 is a cross-sectional view illustrating a structure for attaching the blow-out grill to the front plate in the outdoor unit of the first embodiment. In FIG. 10, the front-back and up-down directions of the outdoor unit are indicated by arrows.

図３〜図７に示すように、室外機１の筐体１０の前板１４は、円形の吹出口１４ｘを有する前面部１４Ａと、前面部１４Ａの左右両端から後方へ折り曲がった折り曲げ部１４Ｂを有する。
また、前板１４の前面部１４Ａの内面（裏面）１４ａｂには、送風機３０によって生じる気流を吹出口１４ｘから外部へ吹き出すように前板１４の内面１４ａｂに連設された円筒形のベルマウス１４ｃが連設されている。
ここで、本発明において、「円形」とは、真円形および真円形に近い円形を意味し、「円環形」および「円筒形」もこれに準じる。 As shown in FIGS. 3 to 7, the front plate 14 of the housing 10 of the outdoor unit 1 has a front portion 14A having a circular outlet 14x and a bent portion 14B bent rearward from both left and right ends of the front portion 14A. Has.
Further, on the inner surface (back surface) 14ab of the front surface portion 14A of the front plate 14, a cylindrical bell mouth 14c is continuously provided on the inner surface 14ab of the front plate 14 so that the airflow generated by the blower 30 is blown out from the outlet 14x. Are connected in a row.
Here, in the present invention, the "circular shape" means a perfect circle and a circle close to a perfect circle, and the "ring shape" and the "cylindrical shape" are also the same.

ベルマウス１４ｃは、その中心点を通る中心軸線Ｐを有し、この中心軸線Ｐは送風機３０の前後方向の回転軸心と略一致すると共に、円形の吹出口１４ｘの中心点とも略一致している。そのため、図３、図６等で示された中心軸線Ｐは送風機３０の回転軸心でもある。
なお、送風機３０の回転軸心は、前板１４と略直交する前後方向に延びている。 The bell mouth 14c has a central axis P passing through its central point, and this central axis P substantially coincides with the center of rotation of the blower 30 in the front-rear direction and also substantially coincides with the center point of the circular outlet 14x. There is. Therefore, the central axis P shown in FIGS. 3 and 6 is also the center of rotation of the blower 30.
The rotation axis of the blower 30 extends in the front-rear direction substantially orthogonal to the front plate 14.

図１０に示すように、ベルマウス１４ｃは、前部１４ｃａ、中間部１４ｃｂおよび後部１４ｃｃを有する。中間部１４ｃｂは略一定の内径を有し、前部１４ｃａは前方へ向かって直線的に拡径し、後部１４ｃｃは後方へ向かって曲線的に拡径している。
前板１４とベルマウス１４ｃとは、１枚の板材から一体成形されてもよく、あるいは別部材同士を溶接、ボルト・ナット結合等にて互いに接合されてもよい。
なお、送風機３０のプロペラ３０ｂの少なくとも一部は、ベルマウス１４ｃの内側スペースにベルマウス１４ｃと非接触状態で回転可能に配置されている。 As shown in FIG. 10, the bell mouth 14c has an anterior 14ca, an intermediate 14cc and a rear 14cc. The middle portion 14cc has a substantially constant inner diameter, the front portion 14ca expands linearly toward the front, and the rear portion 14cc expands radially toward the rear.
The front plate 14 and the bell mouth 14c may be integrally molded from one plate material, or different members may be joined to each other by welding, bolt-nut coupling, or the like.
At least a part of the propeller 30b of the blower 30 is rotatably arranged in the inner space of the bell mouth 14c in a non-contact state with the bell mouth 14c.

また、図５と図６に示すように、前板１４は吹出口１４ｘの周囲部に所定間隔で設けられた複数の貫通孔１４ｄを有すると共に、複数の貫通孔１４ｄは吹出口１４ｘの周囲部の上縁に配置された少なくとも１つの上縁貫通孔１４ｄｘを含む。なお、本実施形態において、円形の吹出口１４ｘの周囲部の上縁とは、円形の吹出口１４ｘの周囲部の上部の領域であって、中心軸線Ｐを中心としかつ重力方向の垂直線Ａ（以下、単に「垂直線Ａ」というときがある）から周方向の左右両側にそれぞれ中心角度４５°程度まで延びた円弧形領域を意味している。 Further, as shown in FIGS. 5 and 6, the front plate 14 has a plurality of through holes 14d provided at predetermined intervals around the outlet 14x, and the plurality of through holes 14d are the peripheral portions of the outlet 14x. Includes at least one upper edge through hole 14dx located on the upper edge. In the present embodiment, the upper edge of the peripheral portion of the circular outlet 14x is a region above the peripheral portion of the circular outlet 14x, and is a vertical line A centered on the central axis P and in the direction of gravity. It means an arc-shaped region extending from (hereinafter, sometimes simply referred to as "vertical line A") to a central angle of about 45 ° on both the left and right sides in the circumferential direction.

第１実施形態の場合、中心軸線Ｐ方向から視て、円形の吹出口１４ｘの周囲部は円環形であり、その周囲部における円弧形の上縁の頂部に１つの上縁貫通孔１４ｄｘ（以下、「頂部貫通孔１４ｄｘ」ということがある）が設けられ、周囲部における上縁よりも下の部分に５つの貫通孔１４ｄが設けられている。
具体的には、図５と図６に示すように、ベルマウス１４ｃの中心軸線Ｐを通る垂直線Ａ上に最上位置の頂部貫通孔１４ｄｘと最下位置の貫通孔１４ｄが配置され、最上位置の頂部貫通孔１４ｄｘと最下位置の貫通孔１４ｄの間に略等間隔で残り４つの貫通孔１４ｄが配置されている。 In the case of the first embodiment, when viewed from the central axis P direction, the peripheral portion of the circular outlet 14x is annular, and one upper edge through hole 14dx (1 upper edge through hole 14dx) is formed at the top of the arc-shaped upper edge in the peripheral portion. Hereinafter, it may be referred to as “top through hole 14dx”), and five through holes 14d are provided in a portion below the upper edge in the peripheral portion.
Specifically, as shown in FIGS. 5 and 6, the top through hole 14dx at the uppermost position and the through hole 14d at the lowest position are arranged on the vertical line A passing through the central axis P of the bell mouth 14c, and the uppermost position. The remaining four through holes 14d are arranged at substantially equal intervals between the top through hole 14dx and the bottom through hole 14d.

頂部貫通孔１４ｄｘを含む６つの貫通孔１４ｄは緩やかな円弧形状を有し、頂部貫通孔１４ｄｘを含む５つの貫通孔１４ｄは同じサイズで形成され、残り１つの貫通孔１４ｄ（１４ｄｙ）は他の貫通孔１４ｄよりも大きいサイズで形成されている。なお、この大きいサイズの貫通孔１４ｄｙは、本実施形態では図６に示すように、正面（前方）から視て、右斜め下の位置に配置されており、この貫通孔１４ｄｙには吹出グリル１４ｂの後述の固定片１４ｂｄが通されるようになっている。 The six through holes 14d including the top through hole 14dx have a gentle arc shape, the five through holes 14d including the top through hole 14dx are formed in the same size, and the remaining one through hole 14d (14dy) is the other. It is formed in a size larger than the through hole 14d. As shown in FIG. 6, this large-sized through hole 14dy is arranged at a position diagonally lower to the right when viewed from the front (front), and the through hole 14dy has a blow-out grill 14b. The fixed piece 14bd, which will be described later, is passed through.

また、前板１４は、外面（表面）１４ａａ側から内面（裏面）１４ａｂ側に陥没するように、吹出口１４ｘの周囲部に円環形の凹部１４ｅを有している。すなわち、円環形の凹部１４ｅに前記複数（６つ）の貫通孔１４ｄが設けられている。
図１０に示すように、この凹部１４ｅは、前板１４の外面１４ａａと略平行な吹出口１４ｘ側の底部１４ｅａと、底部１４ｅａと前板１４の外面１４ａａとを繋ぐ傾斜部１４ｅｂとを有してなる。なお、傾斜部１４ｅｂは、中心軸線Ｐから離れるにつれて前方へ傾斜している。 Further, the front plate 14 has a ring-shaped recess 14e around the air outlet 14x so as to be depressed from the outer surface (front surface) 14aa side to the inner surface (back surface) 14ab side. That is, the plurality (six) through holes 14d are provided in the annular recess 14e.
As shown in FIG. 10, the recess 14e has a bottom portion 14ea on the air outlet 14x side substantially parallel to the outer surface 14aa of the front plate 14, and an inclined portion 14eb connecting the bottom portion 14ea and the outer surface 14aa of the front plate 14. It becomes. The inclined portion 14eb is inclined forward as it is separated from the central axis P.

吹出グリル１４ｂは、円い盆形のグリル本体１４ｂａと、グリル本体１４ｂａの外周部の後面（裏面）に沿って後方（グリル本体１４ｂａとは反対側の方向）に突出して設けられた円環形の水誘導リブ１４ｂｂと、水誘導リブ１４ｂｂの後面から後方へ突出して設けられた５つの係止凸部１４ｂｃおよび１つの前記固定片１４ｂｄとを有する。 The outlet grill 14b has a circular tray-shaped grill body 14ba and a ring-shaped grill body 14ba projecting rearward (in the direction opposite to the grill body 14ba) along the rear surface (back surface) of the outer peripheral portion of the grill body 14ba. It has a water-guided rib 14bb, five locking protrusions 14bc provided so as to project rearward from the rear surface of the water-guided rib 14bb, and one fixing piece 14bd.

図３、図４、図８および図９に示すように、吹出グリル１４ｂの５つの係止凸部１４ｂｃおよび１つの固定片１４ｂｄは、吹出グリル１４ｂを筐体１０に取り付ける際に前板１４の同じサイズの５つの貫通孔１４ｄおよび大きいサイズの貫通孔１４ｄｙに挿入される部分であり、グリル本体１４ｂａの中心に対して周方向に略等間隔で配置されている。 As shown in FIGS. 3, 4, 8 and 9, the five locking protrusions 14bc and one fixing piece 14b of the outlet grill 14b are attached to the front plate 14 when the outlet grill 14b is attached to the housing 10. It is a portion to be inserted into five through holes 14d of the same size and a through hole 14dy of a large size, and is arranged at substantially equal intervals in the circumferential direction with respect to the center of the grill body 14ba.

図９に示すように、５つの係止凸部１４ｂｃは、グリル本体１４ｂａの中心に対して周方向の同一方向にＬ字形に折れ曲がった屈曲部分をそれぞれ有しており、それらの屈曲部分には水誘導リブ１４ｂｂ側へ突出した突起部１４ｂｃａが設けられている。なお、水誘導リブ１４ｂｂの裏面における各係止凸部１４ｂｃの突起部１４ｂｃａの近傍にも複数の突起部１４ｂｂａが設けられている。 As shown in FIG. 9, each of the five locking convex portions 14bc has bent portions bent in an L shape in the same circumferential direction with respect to the center of the grill body 14ba, and the bent portions have bent portions. A protrusion 14bca projecting toward the water guiding rib 14bb is provided. A plurality of protrusions 14bba are also provided in the vicinity of the protrusions 14bca of each locking protrusion 14bb on the back surface of the water induction rib 14bb.

また、５つの係止凸部１４ｂｃにおいて、水誘導リブ１４ｂｂと接続した基端部１４ｂｃｂ周方向の幅Ｇ（図９参照）は、それらに対応する前板１４の５つの貫通孔１４ｄの周方向の幅Ｊ（図６参照）よりも小さく、例えば、略半分の幅となっている。
固定片１４ｂｄは、水誘導リブ１４ｂｂとの接続部分である基端部ｂｃｂが後方へ突出し、先端部はグリル本体１４ｂａの中心に対して径方向外方へ折れ曲がりかつネジ孔１４ｂｄａを有している。
また、固定片１４ｂｄの周方向の幅は、前板１４の５つの貫通孔１４ｄの周方向の幅Ｊより大きくしている。固定片１４ｂｄを幅広にしておくことで、固定片１４ｂｄが５つの貫通孔１４ｄのいずれかに誤って取り付けられるのを防いでいる。 Further, in the five locking convex portions 14bc, the width G (see FIG. 9) in the circumferential direction of the base end portion 14bbb connected to the water guiding rib 14bb is the circumferential direction of the five through holes 14d of the front plate 14 corresponding thereto. The width is smaller than the width J (see FIG. 6), for example, about half the width.
In the fixed piece 14bd, the base end portion bcb, which is a connecting portion with the water guiding rib 14bb, protrudes rearward, and the tip portion is bent radially outward with respect to the center of the grill body 14ba and has a screw hole 14bda. ..
Further, the width of the fixed piece 14bd in the circumferential direction is made larger than the width J of the five through holes 14d of the front plate 14 in the circumferential direction. By keeping the fixing piece 14b wide, it is possible to prevent the fixing piece 14bd from being mistakenly attached to any of the five through holes 14d.

このように構成された吹出グリル１４ｂを筐体１０の前板１４の外面１４ａａ側に取り付ける際は、吹出グリル１４ｂの固定片１４ｂｄを前板１４のサイズが大きい貫通孔１４ｄｙに通すと共に、５つの係止凸部１４ｂｃを残り５つの貫通孔１４ｄに通し、吹出グリル１４ｂを係止凸部１４ｂｃの折れ曲がった方向に回す。これにより、吹出グリル１４ｂの水誘導リブ１４ｂｂの複数の突起部１４ｂｂａと複数の係止凸部１４ｂｃの突起部１４ｂｃａ（図９参照）との間に前板１４における５つの貫通孔１４ｄの端縁が挟み込まれる。また、中心軸線Ｐ方向から視て、吹出グリル１４ｂの水誘導リブ１４ｂｂと前板１４の６つの貫通孔１４ｄとが重なる。 When the blowout grill 14b configured in this way is attached to the outer surface 14aa side of the front plate 14 of the housing 10, the fixing piece 14bd of the blowout grill 14b is passed through the large through hole 14dy of the front plate 14, and five The locking convex portion 14bc is passed through the remaining five through holes 14d, and the blowout grill 14b is turned in the bent direction of the locking convex portion 14bc. As a result, the edge of the five through holes 14d in the front plate 14 between the plurality of protrusions 14bba of the water induction rib 14bb of the outlet grill 14b and the protrusions 14bca of the plurality of locking protrusions 14bc (see FIG. 9). Is sandwiched. Further, when viewed from the central axis P direction, the water guide rib 14bb of the blowout grill 14b and the six through holes 14d of the front plate 14 overlap each other.

その後、前板１４のサイズが大きい貫通孔１４ｄｙの近傍に設けられたネジ孔１４ｄｎ（図６、図７参照）に外面１４ａａ側からワッシャを介してネジ１４ｎ（図３参照）をねじ込んで挿通させると共に、ネジ１４ｎの先端を固定片１４ｂｄのネジ孔１４ｂｄａ（図８参照）に羅着させることにより、吹出グリル１４ｂを前板１４に固定する。 After that, the screw 14n (see FIG. 3) is screwed into the screw hole 14dn (see FIGS. 6 and 7) provided in the vicinity of the large through hole 14dy of the front plate 14 from the outer surface 14aa side via a washer. At the same time, the blowout grill 14b is fixed to the front plate 14 by attaching the tip of the screw 14n to the screw hole 14bda (see FIG. 8) of the fixing piece 14bd.

吹出グリル１４ｂが前板１４に取り付けられた状態において、５つの係止凸部１４ｂｃの基端部１４ｂｃｂは５つの貫通孔１４ｄの周方向の一方側、すなわち、吹出グリル１４ｂを回した方向側へ寄る（図４、図９参照）。これにより、前板１４の内面１４ａｂ側から視て、各係止凸部１４ｂｃが挿通した各貫通孔１４ｄにおける周方向の略半分の幅の領域が開口した状態となる（図４参照）。特に、頂部貫通孔１４ｄｘにおいては、ベルマウス１４ｃの中心軸線Ｐを通る垂直線Ａ上が開口していることが好ましい。 In the state where the blow-out grill 14b is attached to the front plate 14, the base end portion 14 bcb of the five locking convex portions 14 bc is directed to one side of the five through holes 14d in the circumferential direction, that is, to the side in which the blow-out grill 14 b is turned. Get closer (see Figures 4 and 9). As a result, when viewed from the inner surface 14ab side of the front plate 14, a region having a width substantially half in the circumferential direction in each through hole 14d through which each locking convex portion 14bc is inserted is opened (see FIG. 4). In particular, in the top through hole 14dx, it is preferable that the vertical line A passing through the central axis P of the bell mouth 14c is open.

また、吹出グリル１４ｂが前板１４に取り付けられた状態においては、吹出グリル１４ｂの水誘導リブ１４ｂｂの複数の突起部１４ｂｂａと前板１４の外面１４ａａとの間、および、吹出グリル１４ｂの複数の係止凸部１４ｂｃの突起部１４ｂｃａと前板１４の内面１４ａｂとの間には、概ね突起部１４ｂｂａ、１４ｂｃａの突出寸法分（例えば、数ｍｍ程度）の隙間が形成される。また、複数の突起部１４ｂｂａによって吹出グリル１４ｂと前板１４の外面１４ａａとは点接触し、かつ、複数の係止凸部１４ｂｃの突起部１４ｂｃａによって吹出グリル１４ｂと前板１４の内面１４ａｂとは点接触する。これにより、室外機１の運転時の振動によって生じやすい吹出グリル１４ｂの所謂「びびり音」と呼ばれる異音が抑制される。 Further, in a state where the blowout grill 14b is attached to the front plate 14, a plurality of protrusions 14bba of the water induction rib 14bb of the blowout grill 14b and a plurality of outer surfaces 14aa of the front plate 14 and a plurality of blowout grills 14b are provided. A gap of approximately the protruding dimensions (for example, about several mm) of the protruding portions 14bba and 14bca is formed between the protruding portion 14bca of the locking convex portion 14bc and the inner surface 14ab of the front plate 14. Further, the blowout grill 14b and the outer surface 14aa of the front plate 14 are in point contact with each other by the plurality of protrusions 14bba, and the blowout grill 14b and the inner surface 14ab of the front plate 14 are brought into contact with each other by the protrusions 14bca of the plurality of locking protrusions 14bc. Make point contact. As a result, the so-called "chattering noise" of the blowout grill 14b, which is likely to be generated by the vibration of the outdoor unit 1 during operation, is suppressed.

＜ベルマウス内での氷柱発生の抑制効果について＞
本発明の室外機１によれば、図３と図１０に示すように、筐体１０の前板１４の外面（前面）１４ａａを伝ってベルマウス１４ｃの中心軸線Ｐを通る垂直線Ａ上を水Ｗが流れ落ちる場合、水Ｗは、吹出口１４ｘの周囲の凹部１４ｅの傾斜部１４ｅｂを伝って吹出口１４ｘの頂部の真上に設けられた頂部貫通孔１４ｄｘに入り込むことができる。この際、水Ｗは、凹部１４ｅの傾斜部１４ｅｂから頂部貫通孔１４ｄｘの開口部分の縁を伝って、矢印Ｑに示すように前板１４の内面１４ａｂ側へ流れることができる。 <About the effect of suppressing the formation of icicles in bell mouths>
According to the outdoor unit 1 of the present invention, as shown in FIGS. 3 and 10, on the vertical line A passing through the central axis P of the bell mouth 14c along the outer surface (front surface) 14aa of the front plate 14 of the housing 10. When the water W flows down, the water W can enter the top through hole 14dx provided directly above the top of the outlet 14x through the inclined portion 14eb of the recess 14e around the outlet 14x. At this time, the water W can flow from the inclined portion 14eb of the recess 14e to the inner surface 14ab side of the front plate 14 along the edge of the opening portion of the top through hole 14dx as shown by the arrow Q.

このように、前板１４の外面１４ａａ側から頂部貫通孔１４ｄｘに入り込んだ水Ｗは、前板１４の内面１４ａｂを伝ってベルマウス１４ｃの外周面１４ｃｘ上を流れて落下する。それに加え、前記垂直線Ａの左右近傍位置を流れる水の一部も、頂部貫通孔１４ｄｘへ直接または吹出グリル１４ｂの係止凸部１４ｂｃを伝って頂部貫通孔１４ｄｘへ入り込んで前板１４の内面１４ａｂ側へ流れ込む場合がある。つまり、前板１４の外面１４ａａにおける前記垂直線Ａ上の領域を含む頂部貫通孔１４ｄｘの真上領域を流れ落ちる水滴は、頂部貫通孔１４ｄｘを通って前板１４の内面１４ａｂ側へ移動することが可能である。これにより、頂部貫通孔１４ｄｘの真下領域への水滴の落下を抑制することができる。 In this way, the water W that has entered the top through hole 14dx from the outer surface 14aa side of the front plate 14 flows on the outer peripheral surface 14cx of the bell mouth 14c along the inner surface 14ab of the front plate 14 and falls. In addition, a part of the water flowing in the vicinity of the left and right of the vertical line A also enters the top through hole 14dx directly into the top through hole 14dx or through the locking convex portion 14bc of the blowout grill 14b and enters the top through hole 14dx to enter the inner surface of the front plate 14. It may flow to the 14ab side. That is, the water droplets flowing down the region directly above the top through hole 14dx including the region on the vertical line A on the outer surface 14aa of the front plate 14 may move to the inner surface 14ab side of the front plate 14 through the top through hole 14dx. It is possible. As a result, it is possible to suppress the drop of water droplets into the region directly below the top through hole 14dx.

また、前板１４の外面（前面）１４ａａを流れ落ちる水のうち、頂部貫通孔１４ｄｘへ入り込まなかった水は、吹出グリル１４ｂの水誘導リブ１４ｂｂにて受けられ、水誘導リブ１４ｂｂの上下方向に湾曲状に傾斜した面に沿って落下する。この際、前記垂直線Ａ上から左右方向に離れるほど水誘導リブ１４ｂｂの上下方向（湾曲方向）の傾斜は大きくなるため、水誘導リブ１４ｂｂにおける頂部貫通孔１４ｄｘの真下領域よりも左右両側部分で受けられた水は水誘導リブ１４ｂｂの湾曲面に沿って流れ落ちやすくなっている。換言すると、頂部貫通孔１４ｄｘへ入り込まなかった水がベルマウス１４ｃの内周面１４ｃｙ側へできるだけ回りこまないよう、吹出グリル１４ｂの水誘導リブ１４ｂｂによって筐体１０の前板１４の外面１４ａａ側で水を落下させる（排水する）ことができる。
なお、頂部貫通孔１４ｄｘへ入り込まなかった水がベルマウス１４ｃの内周面１４ｃｙ側へ回り込んだ（移動した）としても、その水はベルマウス１４ｃの湾曲方向（上下方向）の湾曲面に沿ってベルマウス１４ｃの下部へ流れ落ちやすい。 Further, of the water flowing down the outer surface (front surface) 14aa of the front plate 14, the water that did not enter the top through hole 14dx is received by the water guiding rib 14bb of the blowout grill 14b and is curved in the vertical direction of the water guiding rib 14bb. It falls along a sloped surface. At this time, since the inclination of the water guiding rib 14bb in the vertical direction (curving direction) becomes larger as the distance from the vertical line A in the left-right direction increases, the water guiding rib 14bb is located on both the left and right sides of the top through hole 14dx. The received water tends to flow down along the curved surface of the water guiding rib 14bb. In other words, on the outer surface 14aa side of the front plate 14 of the housing 10 by the water guiding rib 14bb of the blowout grill 14b so that the water that did not enter the top through hole 14dx does not go around as much as possible to the inner peripheral surface 14cy side of the bell mouth 14c. Water can be dropped (drained).
Even if the water that did not enter the top through hole 14dx wraps around (moves) toward the inner peripheral surface 14cy side of the bell mouth 14c, the water follows the curved surface in the bending direction (vertical direction) of the bell mouth 14c. It easily flows down to the bottom of the bell mouth 14c.

このように、本発明の室外機１によれば、筐体１０の前板１４の外面１４ａａを伝ってベルマウス１４ｃの中心軸線Ｐを通る垂直線Ａ上およびその近傍を流れる水を積極的に頂部貫通孔１４ｄｘに通して前板１４の内面１４ａｂ側へ誘導することができるため、ベルマウス１４ｃの内周面１４ｃｙの頂部への水の移動を抑制することができる。また、その結果、ベルマウス１４ｃの内周面１４ｃｙの頂部から送風機３０のプロペラ３０ｂの方へ向かって氷柱が形成され、ファンが氷柱と接触して異音が発生する、氷柱によってファンの回転が妨げられる等の不具合を抑制することができる。
また、円形の吹出グリル１４ｂの周囲部に円環形の水誘導リブ１４ｂｂを設けることにより、特許文献１のような四角形の吹出グリルに比べて吹出グリル１４ｂの小型化を維持でき、かつ、特許文献１および２のような別部材としての庇部材が不要となるため、コスト優位性を維持したまま氷柱対策を行うことが可能となる。 As described above, according to the outdoor unit 1 of the present invention, water flowing on and in the vicinity of the vertical line A passing through the central axis P of the bell mouth 14c along the outer surface 14aa of the front plate 14 of the housing 10 is positively flowed. Since it can be guided to the inner surface 14ab side of the front plate 14 through the top through hole 14dx, the movement of water to the top of the inner peripheral surface 14cy of the bell mouth 14c can be suppressed. As a result, an icicle is formed from the top of the inner peripheral surface 14cy of the bell mouth 14c toward the propeller 30b of the blower 30, and the fan comes into contact with the icicle to generate an abnormal noise. The icicle causes the fan to rotate. Problems such as being hindered can be suppressed.
Further, by providing the annular water guide rib 14bb around the circular blowing grill 14b, the size of the blowing grill 14b can be maintained as compared with the square blowing grill as in Patent Document 1, and the patent document Since the eaves member as a separate member such as 1 and 2 is not required, it is possible to take measures against the icicle while maintaining the cost advantage.

（第２実施形態）
図１１は第２実施形態の室外機における吹出グリルを取り外した前板の正面図であり、図１２は第２実施形態の室外機における吹出グリルの頂部付近を示す斜視図である。なお、図１１と図１２において、図３と図６中の要素と同様の要素には同一の符号を付している。
第２実施形態の室外機は、筐体の前板１１４の構成が第１実施形態とは異なる以外は、第１実施形態と同様に構成されている。
以下、第２実施形態における第１実施形態とは異なる点を主に説明する。 (Second Embodiment)
FIG. 11 is a front view of the front plate from which the blow-out grill is removed in the outdoor unit of the second embodiment, and FIG. 12 is a perspective view showing the vicinity of the top of the blow-out grill in the outdoor unit of the second embodiment. In addition, in FIGS. 11 and 12, the same reference numerals are given to the same elements as those in FIGS. 3 and 6.
The outdoor unit of the second embodiment has the same configuration as that of the first embodiment except that the configuration of the front plate 114 of the housing is different from that of the first embodiment.
Hereinafter, the points different from the first embodiment in the second embodiment will be mainly described.

図１１と図１２に示すように、第２実施形態の室外機において、前板１１４は、吹出口１４ｘの周囲部の円環形の凹部１４ｅに、第１実施形態と同様に１つの上縁貫通孔１４ｄｘ（以下、「頂部貫通孔１４ｄｘ」という）を含む６つの貫通孔１４ｄが設けられると共に、頂部貫通孔１４ｄｘの近傍に１つ以上の別の上縁貫通孔１４ｄｚが設けられている。
本実施形態の場合、ベルマウス１４ｃの中心軸線を通る垂直線Ａ上に設けられた頂部貫通孔１４ｄｘに対して、周方向の左側に別の上縁貫通孔１４ｄｚが２つ設けられると共に、周方向の右側に別の上縁貫通孔１４ｄｚが２つ設けられている。頂部貫通孔１４ｄｘおよび別の４つの上縁貫通孔１４ｄｚは、第１実施形態で説明した吹出口１４ｘの周囲部における上縁、すなわち、円形の吹出口１４ｘの周囲部の上部の領域であって、中心軸線Ｐを中心としかつ垂直線Ａから周方向の左右両側にそれぞれ中心角度約４５°まで延びた円弧形領域内に略等間隔で配置されている。 As shown in FIGS. 11 and 12, in the outdoor unit of the second embodiment, the front plate 114 penetrates one upper edge through the annular recess 14e of the peripheral portion of the air outlet 14x as in the first embodiment. Six through holes 14d including the hole 14dx (hereinafter referred to as "top through hole 14dx") are provided, and one or more other upper edge through holes 14dz are provided in the vicinity of the top through hole 14dx.
In the case of the present embodiment, with respect to the top through hole 14dx provided on the vertical line A passing through the central axis of the bell mouth 14c, two other upper edge through holes 14dz are provided on the left side in the circumferential direction, and the circumference is also provided. Two other upper edge through holes 14dz are provided on the right side in the direction. The top through hole 14dx and the other four upper edge through holes 14dz are the upper edges at the periphery of the outlet 14x described in the first embodiment, that is, the upper region of the periphery of the circular outlet 14x. , Are arranged at substantially equal intervals in an arcuate region centered on the central axis P and extending from the vertical line A on both the left and right sides in the circumferential direction to a central angle of about 45 °.

頂部貫通孔１４ｄｘの左右両側の４つの上縁貫通孔１４ｄｚは、吹出グリル１４ｂの複数の係止凸部１４ｂｃ（図８参照）を引っ掛けるための孔ではなく、前板１４の内面１４ａｂ（図１０参照）側へ水を誘導するための孔である。つまり、上縁貫通孔１４ｄｘへ入り込まなかった水の一部は水誘導リブ１４ｂｂに沿って下方へ流れるが、水誘導リブ１４ｂｂと前板１４の凹部１４ｅとの間の隙間に水が入り込む場合がある。このような水を４つの上縁貫通孔１４ｄｚに通して積極的に前板１４の内面１４ａｂ側へ誘導することにより、ベルマウス１４ｃの内周面１４ｃｙ側（図１０参照）へできるだけ水が回りこまないようにしている。
なお、本実施形態においては、頂部貫通孔１４ｄｘ、４つの上縁貫通孔１４ｄｚおよび他の貫通孔１４ｄが水誘導リブ１４ｂｂと重なる位置に設けられているため、吹出口１４ｘから外部へ吹き出される風がこれらの貫通孔から抜けることがない。 The four upper edge through holes 14dz on the left and right sides of the top through hole 14dx are not holes for hooking a plurality of locking convex portions 14bc (see FIG. 8) of the blowout grill 14b, but are not holes for hooking the plurality of locking convex portions 14bc (see FIG. (See) A hole for guiding water to the side. That is, a part of the water that did not enter the upper edge through hole 14dx flows downward along the water guiding rib 14bb, but the water may enter the gap between the water guiding rib 14bb and the recess 14e of the front plate 14. is there. By passing such water through the four upper edge through holes 14ds and positively guiding it toward the inner surface 14ab side of the front plate 14, the water circulates as much as possible to the inner peripheral surface 14cy side (see FIG. 10) of the bell mouth 14c. I try not to get stuck.
In the present embodiment, since the top through hole 14dx, the four upper edge through holes 14dz and the other through holes 14d are provided at positions overlapping with the water guide rib 14bb, the air is blown out from the outlet 14x. The wind does not escape through these through holes.

（第３実施形態）
図１３は第３実施形態の室外機における吹出グリルを裏側から視た斜視図であり、図１４は図１３中の一点鎖線内の領域を拡大した図であり、図１５は第３実施形態の室外機における吹出グリルの頂部付近を示す斜視図である。なお、図１３〜図１５において、図１〜図３、図８および図９中の要素と同様の要素には同一の符号を付している。
第３実施形態の室外機は、吹出グリル２１４ｂの構成が第１実施形態とは異なる以外は、第１実施形態と同様に構成されている。
以下、第３実施形態における第１実施形態とは異なる点を主に説明する。 (Third Embodiment)
FIG. 13 is a perspective view of the blow-out grill in the outdoor unit of the third embodiment as viewed from the back side, FIG. 14 is an enlarged view of the region within the alternate long and short dash line in FIG. 13, and FIG. 15 is a view of the third embodiment. It is a perspective view which shows the vicinity of the top of the blow-out grill in an outdoor unit. In addition, in FIGS. 13 to 15, the same reference numerals are given to the same elements as those in FIGS. 1 to 3, 8 and 9.
The outdoor unit of the third embodiment has the same configuration as that of the first embodiment except that the configuration of the outlet grill 214b is different from that of the first embodiment.
Hereinafter, the points different from the first embodiment in the third embodiment will be mainly described.

図１３〜図１５に示すように、第３実施形態の場合、吹出グリル２１４ｂは、 筐体の前板１４に取り付けられた状態において上縁貫通孔１４ｄｘ（以下、「頂部貫通孔１４ｄｘ」という）の前方近傍位置に配置され、かつ、前板１４の外面１４ａａを伝って流れ落ちる水を受けて頂部貫通孔１４ｄｘへ誘導する少なくとも１つの凹形水受リブ１４ｂｘを有している。
具体的には、吹出グリル２１４ｂの水誘導リブ１４ｂｂにおける頂部貫通孔１４ｄｘに対応する係止凸部１４ｂｃの近傍外周部分が盛り上がり、その盛り上がった部分の外周面に係止凸部１４ｂｃ側が深くなった凹曲面が設けられることによって凹形水受リブ１４ｂｘが形成されている。 As shown in FIGS. 13 to 15, in the case of the third embodiment, the blowout grill 214b is attached to the front plate 14 of the housing and has an upper edge through hole 14dx (hereinafter referred to as “top through hole 14dx”). It has at least one concave water receiving rib 14bx which is arranged near the front of the front plate 14 and which receives the water flowing down along the outer surface 14aa of the front plate 14 and guides it to the top through hole 14dx.
Specifically, the outer peripheral portion in the vicinity of the locking convex portion 14bc corresponding to the top through hole 14dx in the water induction rib 14bb of the blowout grill 214b is raised, and the locking convex portion 14bc side is deepened on the outer peripheral surface of the raised portion. The concave water receiving rib 14bx is formed by providing the concave curved surface.

吹出グリル２１４ｂに凹形水受リブ１４ｂｘを設けることにより、図１５に示すように、前板１４の外面１４ａａを伝って頂部貫通孔１４ｄｘの真上から流れる水が矢印Ｆのように凹形水受リブ１４ｂｘにて受けられ、凹形水受リブ１４ｂｘにて受けられた水が頂部貫通孔１４ｄｘへ誘導されて前板１４の内面１４ａｂ側（図１０参照）へ流れる。
これにより、前板１４の外面１４ａａを伝って頂部貫通孔１４ｄｘの真上から流れる水を積極的に前板１４の内面１４ａｂ側へ誘導することにより、ベルマウス１４ｃの内周面１４ｃｙ側（図１０参照）へできるだけ水滴が回りこまないようにすることができる。 By providing the concave water receiving rib 14bx on the outlet grill 214b, as shown in FIG. 15, water flowing from directly above the top through hole 14dx along the outer surface 14aa of the front plate 14 is concave water as shown by arrow F. Water received by the receiving rib 14bx and received by the concave water receiving rib 14bx is guided to the top through hole 14dx and flows to the inner surface 14ab side (see FIG. 10) of the front plate 14.
As a result, the water flowing from directly above the top through hole 14dx along the outer surface 14aa of the front plate 14 is positively guided to the inner surface 14ab side of the front plate 14, so that the inner peripheral surface 14cy side of the bell mouth 14c (FIG. It is possible to prevent water droplets from sneaking into (see 10) as much as possible.

（第４実施形態）
図１６は第４実施形態の室外機における前板への吹出グリルの取付構造を説明する断面図であり、図１７は吹出グリルを取り外した室外機を示す図１６の対応図であり、図１８は第４実施形態の室外機における吹出グリルの頂部付近を裏側から視た斜視図である。なお、図１６〜図１８において、図９と図１０中の要素と同様の要素には同一の符号を付している。
第４実施形態の室外機は、前板３１４および吹出グリル３１４ｂの構成が第１実施形態とは異なる以外は、第１実施形態と同様に構成されている。
以下、第４実施形態における第１実施形態とは異なる点を主に説明する。 (Fourth Embodiment)
FIG. 16 is a cross-sectional view for explaining the attachment structure of the blow-out grille to the front plate in the outdoor unit of the fourth embodiment, and FIG. 17 is a corresponding view of FIG. 16 showing the outdoor unit from which the blow-out grille is removed. Is a perspective view of the vicinity of the top of the outlet grill in the outdoor unit of the fourth embodiment as viewed from the back side. In FIGS. 16 to 18, the same elements as those in FIGS. 9 and 10 are designated by the same reference numerals.
The outdoor unit of the fourth embodiment has the same configuration as that of the first embodiment except that the front plate 314 and the outlet grill 314b are different from the first embodiment.
Hereinafter, the points different from the first embodiment in the fourth embodiment will be mainly described.

図１６〜図１８に示すように、第４実施形態の室外機３０１において、筐体３１０の前板３１４には、円形の吹出口１４ｘの周囲部には前方から視て円環形の凹部３１４ｅが設けられている。
この凹部３１４ｅは、ベルマウス１４ｃの中心軸線Ｐ側の内側面部３１４ｅａと、中心軸線Ｐとは反対側の外側面部３１４ｅｂと、内側面部３１４ｅａと外側面部３１４ｅｂとの間の底部３１４ｅｃとを有している。 As shown in FIGS. 16 to 18, in the outdoor unit 301 of the fourth embodiment, the front plate 314 of the housing 310 has an annular recess 314e viewed from the front around the circular outlet 14x. It is provided.
The recess 314e has an inner side surface portion 314 ea on the central axis P side of the bell mouth 14c, an outer surface portion 314 eb on the side opposite to the central axis P, and a bottom portion 314 ec between the inner side surface portion 314 ea and the outer surface portion 314 eb. There is.

凹部３１４ｅにおいて、内側面部３１４ｅａは中心軸線Ｐから離れるにつれて後方へ傾斜しており、外側面部３１４ｅｂは中心軸線Ｐへ接近するにつれて後方へ傾斜しており、底部３１４ｅｃは前板３１４と略平行となっている。
また、凹部３１４ｅの内側面部３１４ｅａにおける中心軸線Ｐを通る垂直線Ａ（図６参照）上に１つの上縁貫通孔１４ｄｘ（以下、「頂部貫通孔１４ｄｘ」という）が設けられると共に、凹部３１４ｅの内側面部３１４ｅａに図示しない他の５つの貫通孔が設けられている。 In the recess 314e, the inner side surface portion 314ea is inclined rearward as it is separated from the central axis P, the outer surface portion 314eb is inclined rearward as it approaches the central axis P, and the bottom portion 314ec is substantially parallel to the front plate 314. ing.
Further, one upper edge through hole 14dx (hereinafter referred to as "top through hole 14dx") is provided on the vertical line A (see FIG. 6) passing through the central axis P in the inner side surface portion 314ea of the recess 314e, and the recess 314e is provided. The inner side surface portion 314ea is provided with five other through holes (not shown).

吹出グリル３１４ｂは、円環形の水誘導リブ３１４ｂｂと、水誘導リブ３１４ｂｂの後面に連設された１つの頂部貫通孔１４ｄｘに対応する係止凸部３１４ｂｃと、５つの貫通孔（不図示）に対応するように水誘導リブ３１４ｂｂの後面に連設された図示しない４つの係止凸部および固定片が設けられている（図８参照）。 The outlet grill 314b has a ring-shaped water guide rib 314 bb, a locking protrusion 314 bc corresponding to one top through hole 14 dx connected to the rear surface of the water guide rib 314 bb, and five through holes (not shown). Correspondingly, four locking protrusions and fixing pieces (not shown) are provided on the rear surface of the water guide rib 314bb (see FIG. 8).

本実施形態の場合、１つの上縁貫通孔１４ｄｘおよび５つの貫通孔（不図示）が前板３１４の凹部３１４ｅの傾斜した内側面部３１４ｅａに設けられているため、吹出グリル３１４ｂが前板３１４に取り付けられたときに傾斜した内側面部３１４ｅａと略平行となるように、水誘導リブ３１４ｂｂの後面は外周側から内周側に向かって前方へ傾斜している。なお、水誘導リブ３１４ｂｂの傾斜した後面における各係止凸部３１４ｂｃの近傍には突起部１４ｂｂａが設けられている。
また、各係止凸部３１４ｂｃの折れ曲がった部分に設けられた突起部１４ｂｃａが水誘導リブ３１４ｂｂの傾斜した後面と略平行となるように、各係止凸部３１４ｂｃの折れ曲がった部分の水誘導リブ３１４ｂｂ側の前面は外周側から内周側に向かって前方へ傾斜している。 In the case of the present embodiment, since one upper edge through hole 14dx and five through holes (not shown) are provided in the inclined inner side surface portion 314ea of the recess 314e of the front plate 314, the blowout grill 314b is provided in the front plate 314. The rear surface of the water guide rib 314bb is inclined forward from the outer peripheral side toward the inner peripheral side so as to be substantially parallel to the inclined inner side surface portion 314ea when attached. A protrusion 14bba is provided in the vicinity of each locking convex portion 314bc on the inclined rear surface of the water induction rib 314bb.
Further, the water guide ribs of the bent portions of the locking convex portions 314 bc so that the protrusions 14 bca provided at the bent portions of the locking convex portions 314 bc are substantially parallel to the inclined rear surface of the water guide ribs 314 bb. The front surface on the 314bb side is inclined forward from the outer peripheral side toward the inner peripheral side.

このように構成された室外機３０１によれば、前板３１４の外面３１４ａａにおける中心軸線Ｐを通る垂直線Ａ（図３参照）上を流れ落ちる水が、凹部３１４ｅの外側面部３１４ｅｂおよび底部３１４ｅｃを伝って前方斜め上方に開口する頂部貫通孔１４ｄｘへ入り込みやすくなるため、より効果的に水（矢印Ｋ）を前板３１４の内面３１４ａｂ側（ベルマウス１４ｃの外周面１４ｃｘ側）へ誘導することができる。 According to the outdoor unit 301 configured in this way, the water flowing down on the vertical line A (see FIG. 3) passing through the central axis P on the outer surface 314aa of the front plate 314 is transmitted through the outer surface portion 314eb and the bottom portion 314ec of the recess 314e. Since it becomes easier to enter the top through hole 14dx that opens diagonally upward and forward, water (arrow K) can be more effectively guided to the inner surface 314ab side of the front plate 314 (the outer peripheral surface 14cx side of the bell mouth 14c). ..

（他の実施形態）
１．第３および第４実施形態において、第２実施形態のように頂部貫通孔の周方向の左右両側に別の上縁貫通孔を設けてもよい。
２．第２実施形態における頂部貫通孔の周方向の左右両側に設けた別の上縁貫通孔に対応するよう、第３実施形態で説明した凹形水受リブを吹出グリルに複数設けてもよい。また、実施形態４で説明した頂部貫通孔と実施形態３で説明した凹形水受リブを組み合わせてもよい。 (Other embodiments)
1. 1. In the third and fourth embodiments, different upper edge through holes may be provided on the left and right sides of the top through hole in the circumferential direction as in the second embodiment.
2. 2. A plurality of concave water receiving ribs described in the third embodiment may be provided on the blowout grill so as to correspond to different upper edge through holes provided on both the left and right sides of the top through hole in the circumferential direction in the second embodiment. Further, the top through hole described in the fourth embodiment and the concave water receiving rib described in the third embodiment may be combined.

３．第１〜第４実施形態では円形の吹出グリルを備えた室外機を例示したが、吹出グリルは円形に限らず、四角形であってもよい。この場合、吹出グリルの四辺に複数の係止凸部が設けられる。また、筐体の前板における吹出口の周囲部に設けられる複数の貫通孔は、四角形の吹出グリルの各係止凸部と対応する位置（上辺と下辺と左右側辺とを有する四角形の各辺に対応する位置）に配置される。この場合、四角形の上辺に設ける１つ以上の上縁貫通孔のうち少なくとも１つは、前板におけるベルマウスの中心軸線を通る垂直線上に配置される頂部貫通孔とする。
また、このように四角形の吹出グリルを用いた室外機の構成は、第２〜第４実施形態にも適用可能である。 3. 3. In the first to fourth embodiments, an outdoor unit provided with a circular outlet grill has been illustrated, but the outlet grill is not limited to a circular shape and may be a quadrangle. In this case, a plurality of locking protrusions are provided on the four sides of the outlet grill. Further, the plurality of through holes provided in the peripheral portion of the air outlet on the front plate of the housing are located at positions corresponding to the locking convex portions of the square outlet grill (each of the quadrangles having the upper side, the lower side and the left and right side sides). It is placed at the position corresponding to the side). In this case, at least one of the one or more upper edge through holes provided on the upper side of the quadrangle is a top through hole arranged on a vertical line passing through the central axis of the bell mouth in the front plate.
Further, the configuration of the outdoor unit using the square outlet grill as described above can also be applied to the second to fourth embodiments.

（まとめ）
本発明の空気調和機の室外機は、吹出口が設けられた前板を有する筐体と、前記前板に略直交する方向の回転軸心を中心として回転可能に前記筐体内に収納される送風機と、前記送風機によって生じる気流を前記吹出口から外部へ吹き出すように前記前板に連設されたベルマウスと、前記吹出口を覆うように前記筐体に取り付けられる吹出グリルとを備え、
前記前板は、前記吹出口の周囲部に設けられた複数の貫通孔を有し、
前記吹出グリルは、前記複数の貫通孔にそれぞれ係止可能な複数の係止凸部を有し、
前記複数の貫通孔は、前記吹出口の周囲部の上縁に配置された少なくとも１つの上縁貫通孔を含み、前記前板の外面を伝って流れ落ちる水を前記上縁貫通孔を通して前記前板の内面側へ誘導可能に構成されたものである。
この構成によれば、前板の外面（表面）を流れる水滴を１つ以上の上縁貫通孔を通して前板の内面側に誘導することができるため、ベルマウスの内周面側へ水滴を侵入させにくくすることができる。 (Summary)
The outdoor unit of the air conditioner of the present invention is rotatably housed in the housing having a front plate provided with an air outlet and a rotation axis in a direction substantially orthogonal to the front plate. A blower, a bell mouth connected to the front plate so as to blow out the airflow generated by the blower to the outside from the air outlet, and a blow grill attached to the housing so as to cover the air outlet are provided.
The front plate has a plurality of through holes provided around the outlet.
The blowout grill has a plurality of locking protrusions that can be locked to the plurality of through holes, respectively.
The plurality of through holes include at least one upper edge through hole arranged on the upper edge of the peripheral portion of the air outlet, and the water flowing down along the outer surface of the front plate is passed through the upper edge through hole to the front plate. It is configured so that it can be guided to the inner surface side of.
According to this configuration, water droplets flowing on the outer surface (surface) of the front plate can be guided to the inner surface side of the front plate through one or more upper edge through holes, so that the water droplets invade the inner peripheral surface side of the bell mouth. It can be made difficult to make.

本発明の空気調和機の室外機は、次のように構成されてもよく、それらが適宜組み合わされてもよい。 The outdoor unit of the air conditioner of the present invention may be configured as follows, or they may be combined as appropriate.

・前記回転軸心方向から視て、前記吹出口および前記吹出グリルはそれぞれ円形であり、
前記前板における前記吹出口の周囲部の上縁頂部に１つの前記上縁貫通孔が配置されてもよい。
この構成によれば、前板の前面を流れる水滴のうち、ベルマウスの中心軸線を通る重力方向の垂直線上を流れる水滴が吹出グリルと前板の外面との間の隙間に侵入しても、この位置に上縁貫通孔を設けておくことで水滴をこの上縁貫通孔に通して前板の内面側へ誘導することが可能となる。この結果、ベルマウス内側の頂部への水滴の侵入を抑制し、ベルマウス内側の頂部での氷柱の形成を抑制し、氷柱が送風機と接触して異音を発生する、送風機の回転を妨げる等の不具合を抑制することができる。さらに、特許文献１および２に記載の庇部材が不要となり、部品点数、組み立て工数およびコストを削減することができる。 -The outlet and the outlet grill are circular when viewed from the direction of the rotation axis.
One upper edge through hole may be arranged at the upper edge top portion of the peripheral portion of the air outlet in the front plate.
According to this configuration, among the water droplets flowing on the front surface of the front plate, even if the water droplets flowing on the vertical line in the direction of gravity passing through the central axis of the bell mouth enter the gap between the blowout grill and the outer surface of the front plate. By providing the upper edge through hole at this position, it is possible to guide water droplets to the inner surface side of the front plate through the upper edge through hole. As a result, the invasion of water droplets into the top inside the bell mouth is suppressed, the formation of icicles at the top inside the bell mouth is suppressed, the icicles come into contact with the blower to generate abnormal noise, and the rotation of the blower is hindered. It is possible to suppress the trouble of. Further, the eaves member described in Patent Documents 1 and 2 becomes unnecessary, and the number of parts, the assembly man-hours, and the cost can be reduced.

・前記前板は、前記外面側から前記内面側に陥没するように、前記複数の貫通孔が設けられた前記吹出口の周囲部に円環形の凹部を有し、
前記吹出グリルは、前記筐体に取り付けられた状態において前記凹部内に配置され、かつ、前記外面を伝って流れ落ちる水を受けて下方へ誘導する水誘導リブを有するものであってもよい。
この構成によれば、上縁貫通孔へ入り込まなかった水滴がベルマウスの内周面側へできるだけ回りこまないよう、吹出グリルの水誘導リブによって筐体の前板の外面側で水滴を落下させる（排水する）ことができる。 -The front plate has an annular recess around the outlet provided with the plurality of through holes so as to sink from the outer surface side to the inner surface side.
The outlet grill may be arranged in the recess in a state of being attached to the housing, and may have a water guide rib that receives the water flowing down the outer surface and guides it downward.
According to this configuration, the water droplets on the outer surface side of the front plate of the housing are dropped by the water guide ribs of the blowout grill so that the water droplets that did not enter the upper edge through hole do not go around to the inner peripheral surface side of the bell mouth as much as possible. Can be (drained).

・前記円環形の凹部は、前記回転軸心側の内側面部を有し、
前記内側面部は、前記回転軸心から離れるにつれて後方へ傾斜しており、
前記上縁貫通孔が、前記内側面部に設けられてもよい。
この構成によれば、前板の外面における中心軸線Ｐを通る垂直線Ａ上を流れ落ちる水が、凹部の頂部貫通孔へ入り込みやすくなるため、より効果的に水を前板の内面側（ベルマウスの外周面側）へ誘導することができる。 -The ring-shaped recess has an inner side surface portion on the rotation axis side.
The inner side surface portion is inclined rearward as the distance from the rotation axis is increased.
The upper edge through hole may be provided in the inner side surface portion.
According to this configuration, the water flowing down on the vertical line A passing through the central axis P on the outer surface of the front plate easily enters the through hole at the top of the recess, so that the water can be more effectively applied to the inner surface side (bell mouth) of the front plate. Can be guided to the outer peripheral surface side of the.

・前記前板は、前記吹出口の周囲部における前記１つの上縁貫通孔の近傍に１つ以上の別の上縁貫通孔を有するものであってもよい。
この構成によれば、水誘導リブと前板の凹部との間の隙間に入り込んだ水を１つ以上の別の上縁貫通孔に通して積極的に前板の内面側へ誘導することができる。 -The front plate may have one or more other upper edge through holes in the vicinity of the one upper edge through hole in the peripheral portion of the air outlet.
According to this configuration, the water that has entered the gap between the water guiding rib and the recess of the front plate can be passed through one or more other upper edge through holes to positively guide the water to the inner surface side of the front plate. it can.

・前記吹出グリルは、前記筐体に取り付けられた状態において、前記少なくとも１つの上縁貫通孔の前方近傍位置に配置されかつ前記前板の外面を伝って流れ落ちる水を受けて前記少なくとも１つの上縁貫通孔へ誘導する少なくとも１つの凹形水受リブを有するものであってもよい。
この構成によれば、前板の外面を伝って頂部貫通孔の真上から流れる水を積極的に前板の内面側へ誘導することができる。 -The blowout grill is arranged at a position near the front of the at least one upper edge through hole in a state of being attached to the housing, and receives water flowing down along the outer surface of the front plate, and is above the at least one. It may have at least one concave water receiving rib that guides to the edge through hole.
According to this configuration, the water flowing from directly above the top through hole along the outer surface of the front plate can be positively guided to the inner surface side of the front plate.

なお、開示された実施の形態は、全ての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上述の説明ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味及び範囲内での全ての変更が含まれることが意図される。 It should be noted that the disclosed embodiments are exemplary in all respects and are not considered to be restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

１ 室外機
１０、３１０ 筐体
１４、１１４、３１４ 前板
１４ａａ、３１４ａａ 外面
１４ａｂ、３１４ａｂ 内面
１４ｂ、２１４ｂ、３１４ｂ 吹出グリル
１４ｂｂ、３１４ｂｂ 水誘導リブ
１４ｂｃ、３１４ｂｃ 係止凸部
１４ｂｘ 凹形水受リブ
１４ｃ ベルマウス
１４ｄ、１４ｄｙ 貫通孔
１４ｄｘ 頂部貫通孔（上縁貫通孔）
１４ｄｚ 上縁貫通孔
１４ｅ、３１４ｅ 凹部
１４ｘ 吹出口
３０ 送風機
３１４ｅａ 内側面部
Ａ 垂直線
Ｐ 中心軸線 1 Outdoor unit 10,310 Housing 14, 114, 314 Front plate 14aa, 314aa Outer surface 14ab, 314ab Inner surface 14b, 214b, 314b Blow-out grill 14bb, 314bb Water induction rib 14bc, 314bc Locking convex part 14bx Concave water receiving rib 14c Bellmouth 14d, 14dy through hole 14dx top through hole (upper edge through hole)
14dz Upper edge through hole 14e, 314e Concave part 14x Outlet 30 Blower 314ea Inner side surface A Vertical line P Center axis

Claims (6)

吹出口が設けられた前板を有する筐体と、前記前板に略直交する方向の回転軸心を中心として回転可能に前記筐体内に収納される送風機と、前記送風機によって生じる気流を前記吹出口から外部へ吹き出すように前記前板に連設されたベルマウスと、前記吹出口を覆うように前記筐体に取り付けられる吹出グリルとを備え、
前記前板は、前記吹出口の周囲部に設けられた複数の貫通孔を有し、
前記吹出グリルは、前記複数の貫通孔にそれぞれ係止可能な複数の係止凸部を有し、
前記複数の貫通孔は、前記吹出口の周囲部の上縁に配置された少なくとも１つの上縁貫通孔を含み、前記前板の外面を伝って流れ落ちる水を前記上縁貫通孔を通して前記前板の内面側へ誘導可能に構成されたことを特徴とする空気調和機の室外機。 A housing having a front plate provided with an air outlet, a blower rotatably housed in the housing about a rotation axis in a direction substantially orthogonal to the front plate, and an air flow generated by the blower. It is provided with a bell mouth connected to the front plate so as to blow out from the outlet and a blowout grill attached to the housing so as to cover the outlet.
The front plate has a plurality of through holes provided around the outlet.
The blowout grill has a plurality of locking protrusions that can be locked to the plurality of through holes, respectively.
The plurality of through holes include at least one upper edge through hole arranged on the upper edge of the peripheral portion of the air outlet, and the water flowing down along the outer surface of the front plate is passed through the upper edge through hole to the front plate. An outdoor unit of an air conditioner characterized in that it can be guided to the inner surface side of the air conditioner. 前記回転軸心方向から視て、前記吹出口および前記吹出グリルはそれぞれ円形であり、
前記前板における前記吹出口の周囲部の上縁頂部に１つの前記上縁貫通孔が配置されている請求項１に記載の室外機。 When viewed from the direction of the center of rotation, the outlet and the outlet grill are circular, respectively.
The outdoor unit according to claim 1, wherein one upper edge through hole is arranged at the upper edge top portion of the peripheral portion of the air outlet in the front plate. 前記前板は、前記外面側から前記内面側に陥没するように、前記複数の貫通孔が設けられた前記吹出口の周囲部に円環形の凹部を有し、
前記吹出グリルは、前記筐体に取り付けられた状態において、前記凹部内に配置されかつ前記外面を伝って流れ落ちる水を受けて下方へ誘導する水誘導リブを有する請求項２に記載の室外機。 The front plate has an annular recess around the air outlet provided with the plurality of through holes so as to sink from the outer surface side to the inner surface side.
The outdoor unit according to claim 2, wherein the outlet grill is arranged in the recess and has a water guiding rib that receives water flowing down the outer surface and guides the water downward while being attached to the housing. 前記円環形の凹部は、前記回転軸心側の内側面部を有し、
前記内側面部は、前記回転軸心から離れるにつれて後方へ傾斜しており、
前記上縁貫通孔が、前記内側面部に設けられている請求項２または３に記載の室外機。 The ring-shaped recess has an inner side surface portion on the rotation axis side.
The inner side surface portion is inclined rearward as the distance from the rotation axis is increased.
The outdoor unit according to claim 2 or 3, wherein the upper edge through hole is provided in the inner side surface portion. 前記前板は、前記吹出口の周囲部における前記１つの上縁貫通孔の近傍に１つ以上の別の上縁貫通孔を有する請求項２〜４のいずれか１つに記載の室外機。 The outdoor unit according to any one of claims 2 to 4, wherein the front plate has one or more other upper edge through holes in the vicinity of the one upper edge through hole in the peripheral portion of the air outlet. 前記吹出グリルは、前記筐体に取り付けられた状態において前記少なくとも１つの上縁貫通孔の前方近傍位置に配置され、かつ、前記前板の外面を伝って流れ落ちる水を受けて前記少なくとも１つの上縁貫通孔へ誘導する少なくとも１つの凹形水受リブを有する請求項１〜５のいずれか１つに記載の室外機。 The outlet grill is arranged at a position near the front of the at least one upper edge through hole in a state of being attached to the housing, and receives water flowing down along the outer surface of the front plate, and receives the water flowing down on the at least one. The outdoor unit according to any one of claims 1 to 5, which has at least one concave water receiving rib that guides the water through the edge through hole.
JP2019106268A 2019-06-06 2019-06-06 Outdoor unit of air conditioner Pending JP2020200967A (en)

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JPH0667895U (en) * 1993-02-24 1994-09-22 松下冷機株式会社 Blower
JPH06331175A (en) * 1993-05-25 1994-11-29 Mitsubishi Heavy Ind Ltd Outdoor unit for air conditioner
JPH09229421A (en) * 1996-02-22 1997-09-05 Sanyo Electric Co Ltd Air conditioner
JP2012154581A (en) * 2011-01-27 2012-08-16 Mitsubishi Electric Corp Outdoor unit of air conditioner
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JP2015166647A (en) * 2014-03-03 2015-09-24 三菱電機株式会社 outdoor unit
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JPH0667895U (en) * 1993-02-24 1994-09-22 松下冷機株式会社 Blower
JPH06331175A (en) * 1993-05-25 1994-11-29 Mitsubishi Heavy Ind Ltd Outdoor unit for air conditioner
JPH09229421A (en) * 1996-02-22 1997-09-05 Sanyo Electric Co Ltd Air conditioner
JP2012154581A (en) * 2011-01-27 2012-08-16 Mitsubishi Electric Corp Outdoor unit of air conditioner
CN202648006U (en) * 2012-06-06 2013-01-02 海尔集团公司 Outdoor unit of air conditioner
JP2015166647A (en) * 2014-03-03 2015-09-24 三菱電機株式会社 outdoor unit
JP2015224825A (en) * 2014-05-28 2015-12-14 日立アプライアンス株式会社 Outdoor machine of air conditioner

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