JP2009103353A

JP2009103353A - Outdoor unit of air conditioner

Info

Publication number: JP2009103353A
Application number: JP2007274954A
Authority: JP
Inventors: Katsuaki Nagahashi; 克章長橋; Ryoji Sato; 良次佐藤; Tetsushi Kishitani; 哲志岸谷; Hiroki Ota; 裕樹太田; Tatsuya Ishigami; 達也石神
Original assignee: Hitachi Appliances Inc
Current assignee: Hitachi Appliances Inc
Priority date: 2007-10-23
Filing date: 2007-10-23
Publication date: 2009-05-14

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outdoor unit of an air conditioner capable of preventing vibration and wind leakage caused by thermal deformation even when a fan is enlarged, having high rigidity to external force, and achieving high reliability, low costs and reduction of noise. <P>SOLUTION: In this outdoor unit of the air conditioner wherein a supply face of an axial fan disposed on a top portion of a housing is a top face of the housing, and the top face of the housing is composed of a top face cover made of sheet metal and having an opening portion at its center, and a roughly cylindrical resin supply duct directing upward, most outer edge portion of the supply duct is mounted on the top face cover by a fixing portion, and provided with a thermal deformation absorbing portion for absorbing thermal deformation. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、空気調和機の室外機に係り、特にビル用マルチパッケージエアコンで多く見られる上吹きタイプの室外機の樹脂製吹出ダクトの支持構造に関する。 The present invention relates to an outdoor unit of an air conditioner, and more particularly to a support structure for a resin blow duct of an up-blowing type outdoor unit often found in a multi-package air conditioner for buildings.

近年、地球温暖化防止、ランニングコスト低減ニーズの高まりにより、店舗やオフィスビルのエネルギー消費量の多くを占める空気調和機の省エネ化が推進されている。電動機を用いたヒートポンプ式空気調和機の消費電力低減の手段としては圧縮機、熱交換器、送風機など各構成機器の高性能・高効率化が追求されている。 In recent years, energy needs have been promoted in air conditioners, which account for a large amount of energy consumption in stores and office buildings, due to increasing needs for preventing global warming and reducing running costs. As means for reducing the power consumption of a heat pump type air conditioner using an electric motor, high performance and high efficiency of each component such as a compressor, a heat exchanger and a blower are being pursued.

また、コンビニエンスストア等の普及に伴い住宅地に設置される機会が多くなったことや、ビル屋上に設置されることの多かったビル用マルチパッケージエアコンにおいても、高層マンションの普及等に伴い、近隣からの騒音クレームがたびたび問題となる。空冷ヒートポンプ式空気調和機の騒音源としては主として圧縮機や送風機等が挙げられ、様々な技術が開示されている。 In addition, with the spread of high-rise condominiums, etc., the number of opportunities to be installed in residential areas with the spread of convenience stores, etc. Noise complaints from are often a problem. A noise source of an air-cooled heat pump type air conditioner mainly includes a compressor, a blower, and the like, and various techniques are disclosed.

上記のような課題を解決する手段として、例えば搭載する送風機の個数を増やせば送風機１個当たりの回転数を下げることができるため、送風音と消費電力を低減することができる。しかし一方では、材料費高騰、市場売価ダウン等、製品売価に占める材料費の割合は増加の一途であり、いたずらに部品点数を増加したり、製品サイズを大きくすることはコストアップに繋がり、しいては製品利益を圧迫させてしまう。 As means for solving the above-described problems, for example, if the number of fans to be mounted is increased, the number of rotations per fan can be reduced, so that blowing sound and power consumption can be reduced. However, on the other hand, the ratio of material costs to the product sales price, such as soaring material costs and market price reductions, is steadily increasing, and unnecessarily increasing the number of parts or increasing the product size will lead to cost increases. This will put pressure on product profits.

このような背景から、送風機の個数を増やさずに、ファンの大口径化により回転数を低減させ、高効率化と低騒音化を図るとともに、ベルマウスを含めた吹出ダクトの高性能化にも配慮し、曲面や曲げ・拡大部等を多用した複雑な形状を採用するケースが少なくない。このような観点から特許文献１（特開２００５−１２７５７８号公報）に開示された技術に見られるように、ベルマウスや吹出ダクトには形状的な自由度が高い樹脂材料を用いることが多く、更にコスト的なメリットから、筐体上面を覆う上面カバー、ベルマウス、吹出ダクトとは一体の樹脂成形部品として構成するのが望ましい。 Against this background, without increasing the number of blowers, the rotation speed is reduced by increasing the diameter of the fan to achieve higher efficiency and lower noise, while improving the performance of the blowout duct including the bell mouth. In consideration, there are many cases that adopt a complicated shape that uses many curved surfaces and bent / enlarged parts. From such a viewpoint, as seen in the technique disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2005-127578), a bell mouth or a blowout duct often uses a resin material having a high degree of freedom in shape, Furthermore, from the viewpoint of cost, it is desirable that the upper cover, the bell mouth, and the blowout duct that cover the upper surface of the housing are configured as an integral resin molded part.

特開２００５−１２７５７８号公報JP 2005-127578 A 特開平７−６３３７３号公報JP 7-63373 A

しかし、大型化したファンを囲うベルマウスや吹出ダクトを樹脂材料で構成しようとすると、非常に大型な部品となってしまい、成形設備が対応できないケースや、成形コスト、金型製作費等が割高となってしまい、結果として部品コストの増加を招く。特にビル用マルチパッケージエアコンでは、必要容量に合わせた幅寸法違いの数種類の筐体で構成されることが多く、同一ファンであっても、筐体の種類ごとに個別の金型が必要となり、金型償却費や管理費等も増加してしまう。そこで、共通部分で且つ曲面を多用するベルマウスと吹出ダクト部のみを樹脂材料で構成し、筐体幅寸法に直接左右される上面カバー部とは分離構造とすることで１種類の金型で対応できるし、部品サイズも小さくできるので、部品コストの増加を最小限に押さえることができる。 However, if the bell mouth and blowout duct surrounding the larger fan are made of resin material, it becomes a very large part, and the case that molding equipment cannot handle, molding cost, mold production cost, etc. are expensive. As a result, the cost of parts is increased. In particular, multi-package air conditioners for buildings are often composed of several types of housings with different width dimensions according to the required capacity, and even with the same fan, individual molds are required for each type of housing. Mold depreciation costs and management costs will also increase. Therefore, only the bell mouth and the blowout duct part which are common parts and use many curved surfaces are made of a resin material, and the top cover part which is directly affected by the housing width dimension is separated from each other, so that one type of mold can be used. This can be accommodated and the component size can be reduced, so that the increase in the component cost can be minimized.

しかしながら、樹脂部品を板金部品にネジ固定すると、互いの線膨張係数の違いにより、樹脂部品が変形してしまったり、締結部に過大な力が加わるので、ネジが緩んだり、最悪の場合破損に至る。特に吹出口近傍では、熱交換器による熱交換後の空気が通過するため、冷房運転時と暖房運転時とでは、１００℃近い温度差が生じるケースもある。一般的な汎用樹脂を用いた場合、ネジ穴が数ミリも移動してしまう場合も少なくない。 However, when resin parts are screwed to sheet metal parts, resin parts may be deformed due to the difference in linear expansion coefficient between them, and excessive force will be applied to the fastening part. It reaches. In particular, in the vicinity of the air outlet, the air after heat exchange by the heat exchanger passes, so there may be a temperature difference of nearly 100 ° C. between the cooling operation and the heating operation. When a general general-purpose resin is used, the screw hole may move several millimeters.

このような課題に対し、特許文献２（特開平７−６３３７３号公報）に開示された技術を挙げることが出来る。すなわち、樹脂部品の取付け方法を引掛け爪の掛合構造とすることで、熱変形を吸収させ、破損を防いでいる。 For such a problem, a technique disclosed in Patent Document 2 (Japanese Patent Laid-Open No. 7-63373) can be cited. That is, by adopting a hooking claw engaging structure as a method of attaching the resin parts, thermal deformation is absorbed and damage is prevented.

しかしながら、ファン近傍は振動の大きな部位でもあるため、掛合構造では振動により樹脂が摩耗し、最悪、脱落に至る。同様に、ネジ穴を長穴にすれば熱変形を吸収可能だが、ネジの緩みを招き、ガタ発生や摩耗に繋がる。 However, since the vicinity of the fan is also a part with a large vibration, the resin wears due to the vibration in the hooking structure, and the worst part is dropped off. Similarly, if the screw hole is a long hole, thermal deformation can be absorbed, but the screw will loosen, leading to looseness and wear.

一方、ネジ固定部周囲にスリットを設ける等、柔支持にすれば熱応力は軽減できるが、同時に強度や剛性の低下を招き、振動増大やびびり音発生、最悪の場合、台風時や積荷時等には破損に至る恐れもある。更には熱変形増加を招き、上面カバーと吹出ダクトとの隙間が発生し、風漏れを起こしてしまう。 On the other hand, thermal stress can be reduced by providing a flexible support, such as by providing a slit around the screw fixing part, but at the same time, the strength and rigidity are reduced, increasing vibration and chatter noise. In the worst case, during typhoons and loads, etc. May lead to damage. Furthermore, thermal deformation increases, and a gap between the top cover and the blowout duct is generated, causing wind leakage.

本発明の目的は、ファンを大型化しても熱変形による振動や風漏れがなく、外力に対しても剛性が強く、高信頼性、低コスト化及び静音化を図った空気調和機の室外ユニットを提供することにある。 An object of the present invention is to provide an outdoor unit for an air conditioner that is free from vibration and wind leakage due to thermal deformation even when the fan is enlarged, has high rigidity against external forces, and is highly reliable, low cost, and quiet. Is to provide.

本発明は、筐体上部に配置された軸流ファンの吹出面を筐体の上面とし、前記筐体上面は板金製の中央に開口部を有する上面カバーと、上方へ向かう略円筒状の樹脂製吹出ダクトとで構成された空気調和機の室外機において、前記吹出ダクトは概ね外縁部が前記上面カバーに固定部にて取付けられると共に、熱変形を吸収する熱変形吸収部が設けられたことを特徴とする。 The present invention uses a blowout surface of an axial fan disposed in the upper part of the housing as the upper surface of the housing, the upper surface of the housing having a top cover having an opening at the center made of sheet metal, and a substantially cylindrical resin facing upward. In the outdoor unit of an air conditioner configured with a blowout duct, the blowout duct is generally provided with an outer edge portion attached to the upper surface cover by a fixed portion, and provided with a thermal deformation absorbing portion that absorbs thermal deformation. It is characterized by.

また、前記吹出ダクトは前記上面カバーに固定されるフランジ部とこのフランジ部から立ち上がる円筒部からなり、前記熱変形吸収部は前記フランジ部に略円周方向に設けられている。 The blowout duct includes a flange portion fixed to the upper surface cover and a cylindrical portion rising from the flange portion, and the thermal deformation absorption portion is provided in the flange portion in a substantially circumferential direction.

また、前記熱変形吸収部は前記フランジ部の前記上面カバーとの固定部より内側に略円周方向に設けられている。 The thermal deformation absorbing portion is provided in a substantially circumferential direction on the inner side of a fixing portion of the flange portion with the upper surface cover.

また、前記吹出ダクトは前記上面カバーに固定されるフランジ部とこのフランジ部から立ち上がる円筒部からなり、前記熱変形吸収部は前記円筒部に縦向きに複数設けられている。 The blowing duct includes a flange portion fixed to the upper surface cover and a cylindrical portion rising from the flange portion, and a plurality of the thermal deformation absorbing portions are provided in the cylindrical portion in a vertical direction.

また、前記熱変形吸収部は前記円筒部から前記フランジ部にかけて、前記フランジ部の前記上面カバーとの固定部間に放射方向に設けられている。 The thermal deformation absorbing portion is provided in a radial direction between the cylindrical portion and the flange portion between the fixed portions of the flange portion and the upper surface cover.

また、前記熱変形吸収部は前記吹出ダクトの表面に曲げ状態に突設されたリブである。また、前記リブは断面が略三角形に曲げ状態に形成されている。また、前記リブは断面が略円弧状に曲げ状態に形成されている。また、前記熱変形吸収部または前記リブは複数個連続して断面が略波形に曲げ状態に形成されている。また、前記吹出ダクト上端には径が拡大する拡大部が設けられ、前記拡大部と前記熱変形吸収部または前記リブにほぼ平行な傾斜面が形成されている。 The thermal deformation absorbing portion is a rib protruding in a bent state on the surface of the blowout duct. The rib is formed in a bent state with a substantially triangular cross section. The rib is formed in a bent state with a substantially arc-shaped cross section. In addition, a plurality of the thermal deformation absorbing portions or the ribs are continuously formed in a bent shape with a substantially corrugated cross section. Moreover, the expansion part which a diameter expands is provided in the said blowing duct upper end, and the inclined surface substantially parallel to the said expansion part and the said heat deformation absorption part or the said rib is formed.

本発明によれば、ファンを大型化しても熱変形による振動や風漏れがなく、外力に対して剛性を強くでき、高信頼性、低コスト化及び静音化を図ることができる。 According to the present invention, even if the fan is increased in size, vibration and wind leakage due to thermal deformation do not occur, rigidity can be increased against external force, and high reliability, low cost, and low noise can be achieved.

以下、本発明の実施例を図面に基いて説明する。図１〜図３、図５、図６は本発明の実施例１を示すものであり、図１は正面図、図２は側面の断面図、図３は平面図で（ａ）は上面カバーと吹出しダクトを除いて示し、（ｂ）は上面カバーと吹出しダクトのみを示す。 Embodiments of the present invention will be described below with reference to the drawings. 1 to 3, 5, and 6 show a first embodiment of the present invention. FIG. 1 is a front view, FIG. 2 is a side sectional view, FIG. 3 is a plan view, and FIG. (B) shows only the top cover and the blowout duct.

室外機の筐体１０上部に配置されたファンモータ２０１により軸流ファン２００が駆動される。軸流ファンの駆動により筐体の側面から背面にかけて配置された熱交換器４００より外気が吸込まれ、熱交換された後、上面カバー１０１の開口部１０６、吹出ダクト１００、ファンガード３０２へと通過し、筐体１０の上方に向かって吹出される。熱交換器４００の水平断面は開口側に向かって開いた略コの字形を形成しており、製品を横並びに連続設置させた場合でも、側面吸込口を遮蔽してしまうのを防止している。そのため、図３（ａ）で熱交換器４００の側面においては、略三角形の隙間３０７が生じてしまうため、塞ぎ板３０１で外気の吸込みを塞いでいる。 The axial flow fan 200 is driven by a fan motor 201 disposed on the top of the casing 10 of the outdoor unit. The outside air is sucked from the heat exchanger 400 arranged from the side surface to the back surface of the housing by driving of the axial fan, and after heat exchange, passes through the opening 106 of the top cover 101, the blowout duct 100, and the fan guard 302. Then, the air is blown out upward of the housing 10. The horizontal cross section of the heat exchanger 400 forms a substantially U-shape that opens toward the opening side, and prevents the side suction port from being shielded even when the product is continuously installed side by side. . Therefore, in FIG. 3A, a substantially triangular gap 307 is generated on the side surface of the heat exchanger 400, so that the suction of the outside air is blocked by the blocking plate 301.

尚、正面側に熱交換器４００は設けない理由は、圧縮機等の冷凍サイクル部品４０１や制御基板等を収納した電気箱４０３への工事・メンテナンス等を考慮したものであり、筐体正面側は脱着可能な正面カバー３０４によって外気を遮断している。 The reason why the heat exchanger 400 is not provided on the front side is that the construction / maintenance of the refrigeration cycle component 401 such as a compressor and the electric box 403 containing the control board is taken into consideration. The outside air is blocked by a removable front cover 304.

更に吹出ダクト１００及び上面カバー１０１の詳細について説明する。吹出ダクト１００と上面カバー１０１とは分離構造で構成されており、吹出ダクト１００のフランジ部１０６の外縁部で、ネジ固定部１０３でネジ数点で固定されている。筐体幅寸法の異なる他容量の機種にも流用しやすいよう、共通部分で且つ曲面の多い吹出ダクト１００は樹脂で構成され、平坦部が多く筐体幅寸法に直接左右する上面カバー１０１は中央に開口部１０６を有する板金で構成されている。 Further, details of the blowout duct 100 and the upper surface cover 101 will be described. The blowout duct 100 and the upper surface cover 101 are configured to be separated from each other, and are fixed to the outer edge portion of the flange portion 106 of the blowout duct 100 by a screw fixing portion 103 at several screw points. The outlet duct 100, which is a common part and has a large curved surface, is made of resin so that it can be easily used for other capacity models with different housing width dimensions, and the top cover 101 that has many flat portions and directly affects the housing width dimension is the center. It is comprised with the sheet metal which has the opening part 106 in the.

また、吹出ダクト１００は下端でベルマウス１０５と一体化しており、ラウンドが施されたフランジ部１０６を形成している。更に吹出ダクト１００の上端側には内径が拡大した拡大部１０２を設けている。これは、吹出面積を可能限り大きく確保することで風速を減速させ、ファンガード３０２から生じる風切り音や圧力損失の低減に効果があり、低騒音化と省エネ化に寄与している。 The blowout duct 100 is integrated with the bell mouth 105 at the lower end to form a rounded flange portion 106. Further, an enlarged portion 102 having an enlarged inner diameter is provided on the upper end side of the blowing duct 100. This is effective in reducing wind speed and pressure loss generated from the fan guard 302 by reducing the wind speed by securing the blowing area as large as possible, contributing to low noise and energy saving.

次に熱変形の形態を説明する。図４は樹脂製吹出ダクト１００と板金製上面カバー１０１をネジ固定部１０３で固定した場合の熱変形の方向を矢印で示したもので、本図では常温で組み立てられた状態から冷房運転したことにより、室外機が加熱されて膨張変形を示す。熱変形量は「熱変形量＝長さ×線膨張係数×温度差」式で表わされ、比較的薄肉形状においては、剛性に係らず、線膨張係数と長さと温度差で変形量はほぼ決まってしまう。 Next, the form of thermal deformation will be described. FIG. 4 shows the direction of thermal deformation when the resin blowout duct 100 and the sheet metal top cover 101 are fixed by the screw fixing portion 103 with arrows. In this figure, the cooling operation is performed from the assembled state at room temperature. Thus, the outdoor unit is heated to show expansion deformation. The amount of thermal deformation is expressed by the formula “thermal deformation amount = length × linear expansion coefficient × temperature difference”. In a relatively thin-walled shape, the deformation amount is almost equal to the linear expansion coefficient, length, and temperature difference regardless of rigidity. It will be decided.

通常の強度設計は、ある想定された外力に対応した強度向上を図るものであるから、板厚アップや補強リブ、ネジ追加等、剛性を向上させることで対処できる。しかし、熱変形の場合は、上式のように剛性の大小に係らず変形量が決まってしまう為、板厚アップやリブ追加等で剛性を上げてしまうと、固定部に作用する応力が増加してしまう。特に面内剛性（面方向の剛性）は、面外方向に比べ極端に剛性が高いため、図４に示すように温度差の大きな部位で異種材料を面内方向に固定するケースでは、固定部に過大な力が加わりやすい。 Since the normal strength design is intended to improve the strength corresponding to an assumed external force, it can be dealt with by improving the rigidity, such as increasing the plate thickness, adding a reinforcing rib, or a screw. However, in the case of thermal deformation, the amount of deformation is determined regardless of the stiffness as shown above, so if the rigidity is increased by increasing the plate thickness or adding ribs, the stress acting on the fixed part increases. Resulting in. In particular, since the in-plane rigidity (the rigidity in the surface direction) is extremely high compared to the out-of-plane direction, in the case where different materials are fixed in the in-plane direction at a portion where the temperature difference is large as shown in FIG. It is easy to apply excessive force to the.

変形方向は形状や固定方法等による剛性バランスによって大きく異なるが、図４の例では円筒部１０４及びフランジ部１０６では径が拡大する方向９０１へ変形しようとする。しかしながら、この変形はフランジ部１０６の面内方向の剛性が非常に高い方向の変形であるため、結果としてネジ固定部１０３に過大な力が作用する。更に、周方向の変形９０２も生じるため、各ネジとネジの中央付近で上下方向に隙間が発生し、風漏れや振動によるびびり音を招く結果となる。また、意匠面でも合わせ面の隙間は外観上も好ましくない。 The deformation direction varies greatly depending on the rigidity balance depending on the shape, the fixing method, and the like, but in the example of FIG. However, since this deformation is a deformation in which the in-plane rigidity of the flange portion 106 is very high, an excessive force acts on the screw fixing portion 103 as a result. Further, since deformation 902 in the circumferential direction also occurs, a gap is generated in the vertical direction near each screw and the center of the screw, resulting in chatter noise due to wind leakage or vibration. In addition, the gap between the mating surfaces is not preferable in terms of appearance even on the design surface.

実施例１はこれらの課題を解決するために、吹出ダクト１００の略円周方向に熱変形を吸収する熱変形吸収部５００を設け、円周方向の熱変形を吸収する柔構造となるように構成されている。図５は本発明の実施例１の吹出ダクト１００を上面カバー１０１に固定した状態の斜視図、図６は図５におけるＡ−Ａ断面図である。図１〜図３と同一符号は同一部位を表わす。 In order to solve these problems, the first embodiment is provided with a thermal deformation absorbing portion 500 that absorbs thermal deformation in a substantially circumferential direction of the blowout duct 100 so as to have a flexible structure that absorbs thermal deformation in the circumferential direction. It is configured. FIG. 5 is a perspective view of a state in which the outlet duct 100 according to the first embodiment of the present invention is fixed to the upper surface cover 101, and FIG. 6 is a cross-sectional view taken along line AA in FIG. 1 to 3 denote the same parts.

本実施例では、フランジ部１０６のネジ固定部１０３の内径側に、外縁に沿った略円周方向に熱変形吸収部として曲げ状態に突設された円周リブ５００を設けており、具体的には樹脂成形時に断面が中空の曲げ状態の円弧状リブ５０３が成形される。この円弧状リブ５０３はフランジ部１０６の径方向の熱変形に応じて、円弧状リブの曲げ構造の両下端部が接近あるいは離れる撓み変形を起こすため、熱変形を効果的に吸収することができる。従って、フランジ部１０６の径方向の熱変形によって、ネジ固定部１０３に作用する力を軽減することができる。 In this embodiment, a circumferential rib 500 is provided on the inner diameter side of the screw fixing portion 103 of the flange portion 106 so as to protrude in a bent state as a heat deformation absorbing portion in a substantially circumferential direction along the outer edge. In the resin molding, the arc-shaped rib 503 having a hollow cross section is molded. This arc-shaped rib 503 causes a bending deformation in which both lower end portions of the bending structure of the arc-shaped rib approach or leave according to the thermal deformation in the radial direction of the flange portion 106, so that the thermal deformation can be effectively absorbed. . Therefore, the force acting on the screw fixing portion 103 can be reduced by the thermal deformation of the flange portion 106 in the radial direction.

一方、室外機は外に設置されるが、台風時のような横荷重に対してはリブは補強の作用を果たすため、ネジ固定部１０３に作用する力を分散・軽減させる効果もある。このような構成とすることで、信頼性と低コスト化、ひいては静音性と省エネ性に優れた空気調和機の室外機を提供できる。 On the other hand, although the outdoor unit is installed outside, the rib acts to reinforce against a lateral load such as during a typhoon, and thus has an effect of dispersing and reducing the force acting on the screw fixing portion 103. By adopting such a configuration, it is possible to provide an outdoor unit for an air conditioner that is excellent in reliability and cost reduction, and thus excellent in silence and energy saving.

図７は本発明の実施例２を示すものであり、図６と同位置における断面図で、同一符号は同一部位を表わす。１０２は前述のように送風機の吹出し口の面積を拡大して騒音を下げるために、吹出ダクト１００の上端部に設けた拡大部である。円筒部１０４の成形金型は型抜きを容易にするため、スライド構造にするのが通常である。しかしながら、前記拡大部１０２を設けると、前記実施例１のような円弧状リブ５０３があると、型抜き構造が複雑なスライド機構となり、成形コストがかかる。 FIG. 7 shows a second embodiment of the present invention, which is a cross-sectional view at the same position as FIG. 6, and the same reference numerals denote the same parts. Reference numeral 102 denotes an enlarged portion provided at the upper end portion of the blowout duct 100 in order to enlarge the area of the blower outlet of the blower and reduce noise as described above. The molding die of the cylindrical portion 104 is usually a slide structure in order to facilitate die cutting. However, when the enlarged portion 102 is provided, if there is the arc-shaped rib 503 as in the first embodiment, the die-cutting structure becomes a complicated slide mechanism, which requires a molding cost.

実施例２では、拡大部１０２の裏面の傾斜面１０２ａに概ね平行となる傾斜面５０２ａを有するように、断面が中空の曲げ状態の略三角形リブ５０２を形成している。このリブ５０２の形成により、吹出ダクト１００の上端部に拡大部１０２があっても、金型のスライド構造としては、図７の斜め矢印方向に抜けやすくなり、単純化でき生産性の向上も図ることができる。 In the second embodiment, the substantially triangular rib 502 having a hollow cross section is formed so as to have an inclined surface 502a substantially parallel to the inclined surface 102a on the back surface of the enlarged portion 102. By forming the rib 502, even if the enlarged portion 102 is present at the upper end portion of the blowing duct 100, the mold slide structure can be easily removed in the direction of the oblique arrow in FIG. 7, which can be simplified and improve productivity. be able to.

図８は本発明の実施例３を示すものであり、図６と同位置における断面図であり、同一符号は同一部位を表わす。実施例１及び２で示すリブを複数個（図では２個）連続して略波形に曲げ状態に断面波形リブ５０４が形成されている。このようにリブを波形に形成することにより、１個のリブより大きな撓み変形量（バネ効果）を得ることができ、更に外力に対する補強効果も向上する。逆に言えば、同等の効果（撓み量）を得るのに、必要なリブ高さを低く（小さく）抑えることができ、高さが低い分だけ金型のスライド構造を単純化できる。この実施例ではリブとして、実施例２の略三角形リブを複数個連続して波形リブ５０４に形成しているが、拡大部１０２の裏面の傾斜面１０２ａに概ね平行となる傾斜面５０４ａをリブ５０４に形成すれば、金型のスライド構造として図の斜め矢印方向に抜けやすくなり、単純化でき生産性の向上も図ることができる。 FIG. 8 shows Embodiment 3 of the present invention, which is a cross-sectional view at the same position as FIG. 6, and the same reference numerals denote the same parts. A plurality of ribs (two in the drawing) shown in the first and second embodiments are continuously formed into a substantially wave-shaped bent corrugated rib 504. By forming the ribs in a corrugated manner in this way, a larger deformation amount (spring effect) than that of one rib can be obtained, and the reinforcing effect against external force is further improved. In other words, in order to obtain the same effect (bending amount), the rib height required can be kept low (small), and the mold slide structure can be simplified by the amount of the low height. In this embodiment, a plurality of substantially triangular ribs of the second embodiment are continuously formed on the corrugated rib 504 as ribs. However, the inclined surface 504 a that is substantially parallel to the inclined surface 102 a on the back surface of the enlarged portion 102 is formed on the rib 504. If it forms, it will become easy to pull out in the direction of the diagonal arrow of a figure as a slide structure of a metal mold | die, and it can simplify and can also improve productivity.

なお、リブ５０４として前記略三角形リブの他に円弧状リブ５０３を連続的に設けても良い。この実施例でも他の実施例と同様な効果を得ることができ、生産性の向上も図ることができる。 In addition to the substantially triangular ribs, arc-shaped ribs 503 may be continuously provided as the ribs 504. In this embodiment, the same effects as in the other embodiments can be obtained, and the productivity can be improved.

図９は本発明の実施例４を示す吹出ダクト１００の斜視図であり、同一符号は同一部位を表わす。本実施例では、拡大部１０２からフランジ部１０６にかけて縦向きに連続して放射方向（半径方向）に突出したの放射リブ５０１を設けている。そしてこの放射リブ５０１は、各ネジ固定部１０３の間に１本づつ位置させているので、円筒部１０４の周方向に複数本設けられている。このリブ５０１は、実施例１と同様に断面が中空の曲げ状態の円弧状リブであるが、実施例２の断面が中空の曲げ状態の略三角形リブでも良い。 FIG. 9 is a perspective view of an outlet duct 100 showing Embodiment 4 of the present invention, where the same reference numerals denote the same parts. In this embodiment, there is provided a radial rib 501 that protrudes in the radial direction (radial direction) continuously from the enlarged portion 102 to the flange portion 106 in the vertical direction. Since the radiation ribs 501 are positioned one by one between the screw fixing portions 103, a plurality of radiation ribs 501 are provided in the circumferential direction of the cylindrical portion 104. The ribs 501 are arc-shaped ribs in a bent state with a hollow cross section as in the first embodiment, but may be substantially triangular ribs in a bent state with a hollow cross section in the second embodiment.

吹出ダクト１００の熱膨張・熱収縮の方向は、それぞれ円筒部１０４では径方向、フランジ部１０６では周方向となるので、リブ５０１は２方向の熱変形方向に対して撓み変形（バネ効果）し、熱による膨張・収縮の変形を効果的に吸収できる。 The direction of thermal expansion and contraction of the blowout duct 100 is the radial direction in the cylindrical portion 104 and the circumferential direction in the flange portion 106, respectively. Therefore, the rib 501 is bent and deformed (spring effect) in two thermal deformation directions. It is possible to effectively absorb the expansion / contraction deformation caused by heat.

また、このリブ５０１の本数を周方向に増やすか、連続して並べて連続した波形に形成すれば、実施例３と同様に大きな撓み変形量（バネ効果）を得ることができ、更に金型のスライド構造も単純化できる。一方、台風時のような横荷重や、積荷時の上下方向等については補強リブとして機能する。 Further, if the number of the ribs 501 is increased in the circumferential direction or continuously formed in a continuous waveform, a large amount of bending deformation (spring effect) can be obtained as in the third embodiment. The slide structure can also be simplified. On the other hand, it functions as a reinforcing rib for lateral loads such as during typhoons and up and down directions during loading.

図１０に本発明の効果を示す。縦軸にネジ固定部１０３への応力をリブ無しを１００％として示し、横軸にリブ無しと、有りの場合を並べて示す。図から分かるように、リブがある場合は、ネジ固定部１０３に作用する応力は４３％で、リブが無い場合の１００％と比べ半分以下に低減している。更には、実施例４の場合、円筒部１０４の金型のスライド構造は水平方向のスライドで構成できるため、金型構造が単純化できる。従って、他の実施例と同様な効果を得ることができ、更に生産性の向上も図ることができる。 FIG. 10 shows the effect of the present invention. The vertical axis shows the stress to the screw fixing portion 103 as 100% without ribs, and the horizontal axis shows the case with no ribs side by side. As can be seen from the figure, when there is a rib, the stress acting on the screw fixing portion 103 is 43%, which is less than half compared to 100% when there is no rib. Furthermore, in the case of the fourth embodiment, the mold slide structure of the cylindrical portion 104 can be configured by a horizontal slide, so that the mold structure can be simplified. Therefore, the same effects as those of the other embodiments can be obtained, and the productivity can be improved.

本発明の実施例１の空気調和機の室外機の正面図。The front view of the outdoor unit of the air conditioner of Example 1 of this invention. 本発明の実施例１の空気調和機の室外機の側面の断面図。Sectional drawing of the side surface of the outdoor unit of the air conditioner of Example 1 of this invention. 本発明の実施例１の空気調和機の室外機の平面図。The top view of the outdoor unit of the air conditioner of Example 1 of this invention. 熱変形の形態の説明図。Explanatory drawing of the form of thermal deformation. 本発明の実施例１の空気調和機の室外機の吹出ダクトおよび上面カバーの斜視図。The perspective view of the blowing duct and upper surface cover of the outdoor unit of the air conditioner of Example 1 of this invention. 本発明の実施例１の空気調和機の室外機の部分断面図。The partial sectional view of the outdoor unit of the air harmony machine of Example 1 of the present invention. 本発明の実施例２の空気調和機の室外機の部分断面図。The fragmentary sectional view of the outdoor unit of the air conditioner of Example 2 of the present invention. 本発明の実施例３の空気調和機の室外機の部分断面図。The fragmentary sectional view of the outdoor unit of the air conditioner of Example 3 of the present invention. 本発明の実施例４の吹出ダクトの斜視図。The perspective view of the blowing duct of Example 4 of this invention. 本発明の実施例４の吹出ダクトの効果を示す特性図。The characteristic view which shows the effect of the blowing duct of Example 4 of this invention.

符号の説明Explanation of symbols

１０…筐体、１００…吹出ダクト、１０１…上面カバー、１０２…出口拡大部、１０２ａ…傾斜面、１０３…固定部（ネジ固定部）、１０４…円筒部、１０５…ベルマウス部、１０６…フランジ部、２００…軸流ファン、２０１…ファンモータ、３００…横フレーム、３０１…塞ぎ板、３０２…ファンガード、３０３…側面カバー、３０４…正面カバー、３０５…縦フレーム、３０６…ベース、３０７…熱交換器上面の隙間、４００…熱交換器、４０１…圧縮機等の冷凍サイクル部品、４０２…足部、４０３…電気箱、５００…円周リブ、５０１…放射リブ、５０２…三角形リブ、５０３…円弧状リブ、５０４…波形リブ、５０４ａ…傾斜面、９００…空気の流れ、９０１…径方向の熱変形、９０２…周方向の熱変形、９０３…端面の熱変形。 DESCRIPTION OF SYMBOLS 10 ... Housing | casing, 100 ... Outlet duct, 101 ... Top cover, 102 ... Outlet expansion part, 102a ... Inclined surface, 103 ... Fixing part (screw fixing part), 104 ... Cylindrical part, 105 ... Bell mouth part, 106 ... Flange 200: axial fan, 201: fan motor, 300 ... horizontal frame, 301 ... closing plate, 302 ... fan guard, 303 ... side cover, 304 ... front cover, 305 ... vertical frame, 306 ... base, 307 ... heat Gap on the upper surface of the exchanger, 400 ... heat exchanger, 401 ... refrigeration cycle parts such as a compressor, 402 ... foot, 403 ... electric box, 500 ... circumferential rib, 501 ... radiation rib, 502 ... triangular rib, 503 ... Arc-shaped ribs, 504 ... corrugated ribs, 504a ... inclined surfaces, 900 ... air flow, 901 ... radial thermal deformation, 902 ... circumferential thermal deformation, 903 ... end face thermal deformation

Claims

筐体上部に配置された軸流ファンの吹出面を筐体の上面とし、前記筐体上面は板金製の中央に開口部を有する上面カバーと、上方へ向かう略円筒状の樹脂製吹出ダクトとで構成された空気調和機の室外機において、
前記吹出ダクトは概ね外縁部が前記上面カバーに固定部にて取付けられると共に、熱変形を吸収する熱変形吸収部が設けられたことを特徴とする空気調和機の室外機。 The blowout surface of the axial flow fan disposed at the top of the housing is the top surface of the housing, the top surface of the housing is a top cover having an opening at the center made of sheet metal, and a substantially cylindrical resin blowout duct facing upward In the outdoor unit of the air conditioner composed of
An outdoor unit of an air conditioner characterized in that an outer edge portion of the blowout duct is generally attached to the upper surface cover by a fixed portion, and a thermal deformation absorbing portion for absorbing thermal deformation is provided.

請求項１に記載の空気調和機の室外機において、前記吹出ダクトは前記上面カバーに固定されるフランジ部とこのフランジ部から立ち上がる円筒部からなり、前記熱変形吸収部は前記フランジ部に略円周方向に設けられたことを特徴とする空気調和機の室外機。 The outdoor unit for an air conditioner according to claim 1, wherein the blowout duct includes a flange portion fixed to the upper surface cover and a cylindrical portion rising from the flange portion, and the thermal deformation absorbing portion is substantially circular on the flange portion. An air conditioner outdoor unit characterized by being provided in a circumferential direction.

請求項２に記載の空気調和機の室外機において、前記熱変形吸収部は前記フランジ部の前記上面カバーとの固定部より内側に略円周方向に設けられたことを特徴とする空気調和機の室外機。 The outdoor unit of the air conditioner according to claim 2, wherein the heat deformation absorbing portion is provided in a substantially circumferential direction inside a fixing portion of the flange portion with the upper surface cover. Outdoor unit.

請求項１〜３のいずれかに記載の空気調和機の室外機において、前記吹出ダクトは前記上面カバーに固定されるフランジ部とこのフランジ部から立ち上がる円筒部からなり、前記熱変形吸収部は前記円筒部に縦向きに複数設けられたことを特徴とする空気調和機の室外機。 The outdoor unit for an air conditioner according to any one of claims 1 to 3, wherein the outlet duct includes a flange portion fixed to the upper surface cover and a cylindrical portion rising from the flange portion, and the thermal deformation absorbing portion is the An outdoor unit of an air conditioner, wherein a plurality of vertical portions are provided in a cylindrical portion.

請求項４に記載の空気調和機の室外機において、前記熱変形吸収部は前記円筒部から前記フランジ部にかけて、前記フランジ部の前記上面カバーとの固定部間に放射方向に設けられたことを特徴とする空気調和機の室外機。 The outdoor unit for an air conditioner according to claim 4, wherein the thermal deformation absorbing portion is provided in a radial direction between the cylindrical portion and the flange portion and between the fixed portions of the flange portion and the upper surface cover. A featured outdoor unit of an air conditioner.

請求項１〜５のいずれかに記載の空気調和機の室外機において、前記熱変形吸収部は前記吹出ダクトの表面に曲げ状態に突設されたリブであることを特徴とする空気調和機の室外機。 The outdoor unit for an air conditioner according to any one of claims 1 to 5, wherein the thermal deformation absorbing portion is a rib projecting in a bent state on a surface of the blowout duct. Outdoor unit.

請求項６に記載の空気調和機の室外機において、前記リブは断面が略円弧状に曲げ状態に形成されたことを特徴とする空気調和機の室外機。 The outdoor unit for an air conditioner according to claim 6, wherein the rib is formed in a bent state in a substantially arc shape in cross section.

請求項６に記載の空気調和機の室外機において、前記リブは断面が略三角形に曲げ状態に形成されたことを特徴とする空気調和機の室外機。 The outdoor unit for an air conditioner according to claim 6, wherein the rib is formed in a bent state with a substantially triangular cross section.

請求項１〜８のいずれかに記載の空気調和機の室外機において、前記熱変形吸収部または前記リブは複数個連続して断面が略波形に曲げ状態に形成されたことを特徴とする空気調和機の室外機。 The outdoor unit of an air conditioner according to any one of claims 1 to 8, wherein a plurality of the heat deformation absorbing portions or the ribs are continuously formed in a bent shape with a substantially corrugated cross section. Harmonic outdoor unit.

請求項１〜９のいずれかに記載の空気調和機の室外機において、前記吹出ダクト上端には径が拡大する拡大部が設けられ、前記拡大部と前記熱変形吸収部または前記リブにほぼ平行な傾斜面を形成されていることを特徴とする空気調和機の室外機。 The outdoor unit for an air conditioner according to any one of claims 1 to 9, wherein an enlarged portion having an enlarged diameter is provided at an upper end of the blowout duct, and is substantially parallel to the enlarged portion and the thermal deformation absorbing portion or the rib. An outdoor unit for an air conditioner, characterized in that an inclined surface is formed.