JP3966750B2 - Air conditioner outdoor unit - Google Patents

Air conditioner outdoor unit Download PDF

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Publication number
JP3966750B2
JP3966750B2 JP2002078022A JP2002078022A JP3966750B2 JP 3966750 B2 JP3966750 B2 JP 3966750B2 JP 2002078022 A JP2002078022 A JP 2002078022A JP 2002078022 A JP2002078022 A JP 2002078022A JP 3966750 B2 JP3966750 B2 JP 3966750B2
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Prior art keywords
heat exchanger
air conditioner
outdoor unit
end plate
heat transfer
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JP2003279073A (en
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良明 長岡
茂樹 杉山
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Toshiba Carrier Corp
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Toshiba Carrier Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は空気調和機の室外ユニットに係わり、特に内側段熱交換器部の端部に断面が略Ｌ字形状の端板が取付けられた空気調和機の室外ユニットに関する。
【０００２】
【従来の技術】
図１０に示すように、従来の空気調和機の室外ユニット２１は、伝熱管２２に所定の間隔を有して重合された多数の板状伝熱フィン２３を複数段に重ねその一部が湾曲した熱交換器２４の外側段熱交換器部２４ｃを背短な端板２５を介してユニット本体２６の底板２７にネジ止めする構造になっていた。
【０００３】
このため、従来の空気調和機の室外ユニット２１は、熱交換器２４を湾曲するための曲げのバラツキによる最内側熱交換器部２４ｂとベルマウス２８の干渉を防ぐため、最内側熱交換器部２４ｃとベルマウス２８との隙間をかなり大きく取らざるを得なかった。この隙間ｇを大きくする手段として、ファン２９の直径を小さくするか、熱交換器の幅を広くする等の方法が取られていた。しかしながら、前者は性能を低下させ、後者は空気調和機の室外ユニット２１が大型になり高価になるなどの問題があり、いずれも適切な手段がなかった。また、外側段熱交換器部２４ｃに背短な端板２５を取付ける場合には、吹出風の一部が最内側熱交換器部２４ｂの端部に露出する伝熱管２２のＵ字部２２ｂを通って逆流するショートサーキットが発生し、段差部分２４ａの熱交換性能を最大限に生かせなかった。
【０００４】
また、従来の空気調和機の室外ユニットは、図１１に示すように、外側段熱交換器部２４ｃが曲げ成形時のスプリングバックにより外方に拡大するため、内側段熱交換器部２４ｂとの間の間隙ｇ１が形成され、熱交換効率が低下する問題があった。また、スプリングバックを防止するためには、別個に係止用ストッパを設けることが必要となり、コストアップになる問題があった。
【０００５】
【発明が解決しようとする課題】
そこで、小型で高性能、かつ、安価な空気調和機の室外ユニットが要望されていた。
【０００６】
本発明は上述した事情を考慮してなされたもので、小型で高性能かつ、安価な空気調和機の室外ユニットを提供することを目的とする。
【０００７】
【課題を解決するための手段】
上記目的を達成するため、本発明の１つの態様によれば、吸込口と吹出口が設けられたユニット本体と、このユニット本体に収納され、伝熱管に所定の間隔を有して重合された多数の板状伝熱フィンを複数段に重ねその一部が湾曲した熱交換器と、この熱交換器に送風する電動ファンと、前記吹出口の周囲に設けられたベルマウスとを有する空気調和機の室外ユニットにおいて、前記熱交換器は、少なくともその一部に各熱交換器部用として分割された分割フィンを含み、内側段熱交換器部と外側段熱交換器部間に段差部が設けられるように前記内側段熱交換器部から前記外側段熱交換器部に向かって短く形成され、かつ、前記内側段熱交換器部の端部には、伝熱フィンと対面する一辺とこの一辺の内側縁から反伝熱フィン側に延びる他辺とからなる断面が略Ｌ字形状の端板が前記ベルマウスに近接するように取付けられ、上記端板の他辺側に、上記一辺側の面と伝熱管のＵ字部間の空間に対応して孔を有することを特徴とする空気調和機の室外ユニットが提供される。これにより、小型で高性能、かつ、安価な空気調和機の室外ユニットが実現され、特に、伝熱管のＵ字部と開口端部を保持固定して拡管作業を行なうことができ、拡管時の伝熱管の長さの縮みを少なくすることができる。
【０００８】
好適な一例では、上記端板は、他辺側にベルマウスとの接触を防ぐための切欠部を有する。
【０００９】
これにより、ベルマウスの円弧部分と端板の隙間をキープしながら、ファンの直径を大きくできて、同一騒音レベルでの風量の増大が図れ、熱交換性能の向上も図れる。
【００１１】
また、他の好適な一例では、上記端板は、その板厚が０．５ｍｍ以上である。これにより、搬送時などに空気調和機の室外ユニットを落下させた場合があっても、端板が変形することはない。
【００１３】
【発明の実施の形態】
以下、本発明に係わる空気調和機の室外ユニットの第１実施形態について添付図面を参照して説明する。
【００１４】
図１は本発明に係わる空気調和機の室外ユニットの第１実施形態の断面図であり、図２は図１の一部を拡大した斜視図である。
【００１５】
図１および図２に示すように、空気調和機の室外ユニット１は、吸込口２ａと吹出口２ｂが設けられたユニット本体２と、このユニット本体２に収納され、冷媒が流れる伝熱管３に所定の間隔を有して重合された多数の板状伝熱フィン４を複数段に重ねその一部が湾曲した熱交換器５と、この熱交換器５に送風する電動ファン６と、吹出口２ｂの周囲に設けられたベルマウス７とを有している。
【００１６】
図２に示すように、上記熱交換器５は、段差部５ａが内側段熱交換器部５ｂと外側段熱交換器部５ｃ間に設けられるように、内側段熱交換器部５ｂから外側段熱交換器部５ｃに向かって短く形成され、かつ、内側段熱交換器部５ｂの端部５ｂ１には端板８が取付けられている。また、伝熱管３に重合された多数の板状伝熱フィン４は、少なくともその一部、例えば、全部が伝熱管の各列毎に分割され重合された分割型フィンで構成されており、従って、内側段熱交換器部５ｂと外側段熱交換器部５ｃは全長に亘って分割された状態になっている。
【００１７】
なお、上記熱交換器は、必ずしも内側段熱交換器部と外側段熱交換器部が全長に亘って分割されている必要はなく、その一部が分割型フィンからなり、残部が内側段熱交換器部と外側段熱交換器部の伝熱管に一体に重合された一体型フィンからなる組合せ型熱交換器であってもよい。
【００１８】
図３に示すように、この端板８は、その板厚ｔが０．５ｍｍ以上であり、断面が略Ｌ字形状でアングル状をなし、伝熱フィン４と対面するＬ字の一辺側には内側段熱交換器部５ｂの伝熱管３が挿入される複数の挿入孔８ａ１が穿設されており、この一辺側と直交する他辺側には上記一辺側の面と伝熱管３のＵ字部３ａの空間に対応して楕円形状の複数の長孔８ａ２が穿設されており、さらに、他辺側の下端部には、取付ネジ孔８ｂが穿設された取付突部８ｃが設けられている。端板８の板厚を０．５ｍｍ以上にすることにより、搬送時などに空気調和機の室外ユニット１を落下させた場合があっても、端板が変形することはない。板厚が０．５ｍｍより小さいと、落下させた場合には、端板が変形する。
【００１９】
また、端板８は、図４に示すように、取付ネジ孔８ｂを貫通するネジ９により、ユニット本体２の底板２ｃの立上部２ｃ１に螺着されている。これにより、内側段熱交換器部５ｂの曲げにバラツキがあっても、端板８は内側段熱交換器部５ｂを確実に所定の位置に固定することができる。また、内側段熱交換器部５ｂ及び外側熱交換器部５ｃは曲げ加工に先立って、伝熱管３の拡管により、伝熱管３と伝熱フィン４とが密着固定される。この拡管固定は伝熱管（Ｕ字管）３のＵ字部３ｂ底部（ヘアピン部）と管開口端部を保持固定し、この管開口部から拡管用のマンドレルを挿入して拡管を行う機械管拡方法が好ましい。この機械管拡方法は、拡管後の伝熱管３の長さの縮みを小さくすることができ、高品質で低コスト化が可能となる。
【００２０】
従来、伝熱管３のＵ字部３ｂ側に端板を設けると、拡管時にＵ字部３ｂを保持固定することが困難なため、上記伝熱管３の長さの縮みが小さい拡管方法は採用困難であったが、上記のように、端板８の他辺側に長孔８ａ２を設けることにより、可能となる。長孔８ａ２は楕円形状に限らず、いかなる形状であってもよい。
【００２１】
図２および図５に示すように、内側段熱交換器部５ｂと吹出口２ｂの周囲に設けられたベルマウス７間には端板８が介在するので、端板８に近接して配置された内側段熱交換器部５ｂが、ベルマウス７と干渉し合うことがないようになっている。さらに、端板８とベルマウス７は近接して設けられ実質的なシール状態を形成するので、吹出口２ｂから内側段熱交換器部５ｂのＵ字部３ｂおよび外側段熱交換器部５ｃのＵ字部３ｃ近傍へ逆流するショートサーキットは防止され、内側段熱交換器部５ｂと外側段熱交換器部５ｃ間に形成される段差部５ａ近傍の熱交換性能を最大限に発揮させることができる。
【００２２】
なお、符号１０は冷媒を圧縮する圧縮機であり、本実施形態では、ユニット本体２に収納されて、室外機ユニットを形成するものであるが、本発明に係わる空気調和機の室外ユニットは、圧縮機がユニット本体に収納されていても、ユニット本体外に設置されるものであってもよい。
【００２３】
次に本発明に係わる空気調和機の室外ユニットの熱交換について説明する。
【００２４】
図１および図２に示すように、電動ファン６の働きで吸込口２ａから吸込まれた空気は、熱交換器５で熱交換し吹出口２ｂからユニット本体２外に吹出される。この熱交換過程において、電動ファン６の働きで、吸込口２ａおよび段差部５ａは負圧になるが、空気流はベルマウス７に近接して端板８が設けられ実質的なシール状態を形成するので、従来のように吹出口から熱交換器のＵ字部近傍に逆流するショートサーキットの発生がなく、吹出口から熱交換器のＵ字部近傍への逆流は防止される。従って、段差部５ａ近傍の熱交換性能を最大限に発揮させることができる。
【００２５】
なお、本発明の効果は、熱交換器は２列に限定されることなく、３列あるいは４列等の複数列でも期待できる。
【００２６】
また、本発明に係わる空気調和機の室外ユニットの第２実施形態について説明する。
【００２７】
本第２実施形態は、上記第１実施形態に用いられる端板にベルマウス端部収納用切欠部を形成した端板を用いるものである。
【００２８】
例えば、図６に示すように、端板８Ａは、伝熱フィン４と対面するＬ字の一辺側には内側段熱交換器部５ｂの伝熱管３が挿入される複数の挿入孔８Ａａ１が穿設されており、この一辺側と直交する他辺側には、複数の長孔８Ａａ２が設けられているとともに、中央部には台形状のベルマウス端部収納用切欠部８Ａｄが形成され、さらに、下端部には取付ネジ孔８Ａｂが穿設された取付突部８Ａｃが設けられている。
【００２９】
従って、図６ないし図８に示すように、切欠部８Ａｄにより、略円形であるベルマウス７Ａの円弧部分と端板８Ａの隙間１１Ａをキープしながら、ファン６Ａの直径を大きくできる。これにより、同一騒音レベルでの風量が増大し熱交換性能を向上させることができる。切欠部は台形に限らず、ベルマウスの円弧部分との干渉を回避できる形状であれば如何なる形状であってもよい。
【００３０】
他の構成は図１に示す空気調和機の室外ユニットと異ならないので、同一符号を付して説明は省略する。
【００３１】
また、本発明に係わる空気調和機の室外ユニットの第３実施形態について説明する。
【００３２】
本第３実施形態は、上記第１実施形態の外側段熱交換器部が底板の平坦な立上部と平行に配設されているのに対して、外側段熱交換器部を係止突起が設けられた立上部に押付けるようにしたものである。
【００３３】
例えば、図９に示すように、ユニット本体２Ｂの底板２Ｂａの立上部２Ｂａ１に係止突起２Ｂａ２が設けられており、この係止突起２Ｂａ２に熱交換器５Ｂの外側段熱交換器部５Ｂｃが当接している。従って、外側段熱交換器部５Ｂｃが曲げ成形時のスプリングバックにより外方に拡大しようとしても、その動きは抑制されて、内側段熱交換器部５Ｂｂとの間の間隙が形成されるのを防止でき、熱交換効率を向上させることができる。また、別個に係止用ストッパを設ける必要がないので、コストダウンが図れる。
【００３４】
【実施例】
本発明に係わる空気調和機の室外ユニットを用い、これに使用される端板の板厚を０．３〜０．８ｍｍまで０．１ｍｍ毎に変化させて、落下試験を行い、端板の変形有無を調査した。
【００３５】
結果：表１に示す。
【００３６】
【表１】

Figure 0003966750
【００３７】
落下時の端板の変形をなくすには、０．５ｍｍ以上の板厚が必要であることがわかった。
【００３８】
【発明の効果】
本発明に係わる空気調和機の室外ユニットによれば、コンパクトで高性能、かつ、安価な空気調和機の室外ユニットを提供することができる。
【図面の簡単な説明】
【図１】本発明に係わる空気調和機の室外ユニットの第１実施形態の断面図。
【図２】図１のＡ部を拡大して示す斜視図。
【図３】本発明に係わる空気調和機の室外ユニットの第１実施形態に用いられる端板の斜視図。
【図４】本発明に係わる空気調和機の室外ユニットの第１実施形態に用いられる端板の取付け状態を示す斜視図。
【図５】図１のＡ部を拡大して示す断面図。
【図６】本発明に係わる空気調和機の室外ユニットの第２実施形態に用いられる端板の斜視図。
【図７】本発明に係わる空気調和機の室外ユニットの第２実施形態の端板の部分を拡大して示す斜視図。
【図８】本発明に係わる空気調和機の室外ユニットの第２実施形態の端板の部分を示す概念図。
【図９】本発明に係わる空気調和機の室外ユニットの第３実施形態の端板近傍を拡大して示す断面図。
【図１０】従来の空気調和機の室外ユニットの概念図。
【図１１】従来の空気調和機の室外ユニットの概念図。
【符号の説明】
１ 空気調和機の室外ユニット
２ ユニット本体
２ａ 吸込口
２ｂ 吹出口
２ｃ 底板
２ｃ１ 立上部
３ 伝熱管
３ａ Ｕ字部
３ｂ Ｕ字部
４ 板状伝熱フィン
５ 熱交換器
５ａ 段差部
５ｂ 内側段熱交換器部
５ｃ 外側段熱交換器部
５ｃ１ 端部
６ 熱交換電動ファン
７ ベルマウス
８ 端板
８ａ 挿入孔
８ｂ 取付ネジ孔
８ｃ 取付突部
９ ネジ
１０ 圧縮機[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an outdoor unit of an air conditioner, and more particularly to an outdoor unit of an air conditioner in which an end plate having a substantially L-shaped cross section is attached to an end of an inner stage heat exchanger.
[0002]
[Prior art]
As shown in FIG. 10, the outdoor unit 21 of a conventional air conditioner has a plurality of plate-like heat transfer fins 23 superposed on a heat transfer tube 22 with a predetermined interval, and a part thereof is curved. The outer stage heat exchanger portion 24c of the heat exchanger 24 is screwed to the bottom plate 27 of the unit body 26 via the short end plate 25.
[0003]
For this reason, the outdoor unit 21 of the conventional air conditioner has an innermost heat exchanger part in order to prevent interference between the innermost heat exchanger part 24b and the bell mouth 28 due to bending variations for bending the heat exchanger 24. The gap between 24c and the bell mouth 28 had to be made quite large. As means for increasing the gap g, methods such as reducing the diameter of the fan 29 or increasing the width of the heat exchanger have been taken. However, the former has a problem that the performance is lowered, and the latter has a problem that the outdoor unit 21 of the air conditioner becomes large and expensive, and none of them has an appropriate means. Moreover, when attaching the short end plate 25 to the outer stage heat exchanger part 24c, the U-shaped part 22b of the heat transfer tube 22 in which a part of the blowing air is exposed at the end part of the innermost heat exchanger part 24b is used. A short circuit that flows back through occurred, and the heat exchange performance of the stepped portion 24a could not be maximized.
[0004]
In addition, as shown in FIG. 11, the outdoor unit of the conventional air conditioner has an outer stage heat exchanger section 24c that expands outward due to a springback during bending, so that the outer stage heat exchanger section 24b is connected to the inner stage heat exchanger section 24b. gap g 1 is formed between the heat exchange efficiency has a problem to decrease. Further, in order to prevent the spring back, it is necessary to provide a stopper for locking separately, which causes a problem of increasing the cost.
[0005]
[Problems to be solved by the invention]
Therefore, there has been a demand for an outdoor unit of an air conditioner that is small, has high performance, and is inexpensive.
[0006]
The present invention has been made in consideration of the above-described circumstances, and an object thereof is to provide a small, high-performance, and inexpensive outdoor unit for an air conditioner.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to one aspect of the present invention, a unit main body provided with a suction port and a blower outlet, and stored in the unit main body and polymerized with a predetermined interval in the heat transfer tube. An air conditioner having a heat exchanger in which a large number of plate-like heat transfer fins are stacked in a plurality of stages, a part of which is curved, an electric fan that blows air to the heat exchanger, and a bell mouth provided around the air outlet In the outdoor unit of the machine, the heat exchanger includes at least a part thereof divided fins for each heat exchanger part, and a step part is provided between the inner stage heat exchanger part and the outer stage heat exchanger part. The inner stage heat exchanger section is formed to be short from the inner stage heat exchanger section toward the outer stage heat exchanger section, and the end of the inner stage heat exchanger section has one side facing the heat transfer fin and this side. The other side extending from the inner edge of one side to the heat transfer fin side and Ranaru section is attached to the end plate of a substantially L-shaped proximate the bell mouth, the other side of the end plate corresponds to the space between the U-shaped portion of the surface and the heat transfer tubes of the one side end An outdoor unit of an air conditioner characterized by having a hole is provided. As a result, a small, high-performance, and inexpensive outdoor unit for an air conditioner is realized, and in particular, the U-shaped portion and the open end of the heat transfer tube can be held and fixed to perform tube expansion work. The shrinkage of the length of the heat transfer tube can be reduced.
[0008]
In a preferred example, the end plate has a cutout for preventing contact with the bell mouth on the other side .
[0009]
As a result, the diameter of the fan can be increased while keeping the gap between the arc portion of the bell mouth and the end plate, the air volume can be increased at the same noise level, and the heat exchange performance can be improved.
[0011]
In another preferred example, the end plate has a thickness of 0.5 mm or more. Thereby, even if the outdoor unit of the air conditioner is dropped during transport or the like, the end plate is not deformed.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of an outdoor unit of an air conditioner according to the present invention will be described with reference to the accompanying drawings.
[0014]
FIG. 1 is a sectional view of a first embodiment of an outdoor unit of an air conditioner according to the present invention, and FIG. 2 is an enlarged perspective view of a part of FIG.
[0015]
As shown in FIGS. 1 and 2, an outdoor unit 1 of an air conditioner includes a unit body 2 provided with a suction port 2a and an outlet 2b, and a heat transfer tube 3 that is housed in the unit body 2 and through which a refrigerant flows. A heat exchanger 5 in which a plurality of plate-like heat transfer fins 4 polymerized at a predetermined interval are stacked in a plurality of stages, a part of which is curved, an electric fan 6 that blows air to the heat exchanger 5, and an outlet 2b and a bell mouth 7 provided around 2b.
[0016]
As shown in FIG. 2, the heat exchanger 5 has an outer stage from the inner stage heat exchanger part 5b such that the step part 5a is provided between the inner stage heat exchanger part 5b and the outer stage heat exchanger part 5c. It is shorter towards the heat exchanger unit 5c, and the end plate 8 is attached to the end portion 5b 1 of the inner stage heat exchanger unit 5b. Further, the large number of plate-like heat transfer fins 4 superposed on the heat transfer tubes 3 are constituted by divided fins that are at least partly, for example, all divided and superposed for each row of the heat transfer tubes. The inner stage heat exchanger section 5b and the outer stage heat exchanger section 5c are in a state of being divided over the entire length.
[0017]
In the heat exchanger, the inner stage heat exchanger part and the outer stage heat exchanger part do not necessarily have to be divided over the entire length, part of which consists of split-type fins, and the remaining part is the inner stage heat. It may be a combined heat exchanger composed of integral fins that are integrally superposed on the heat transfer tubes of the exchanger part and the outer stage heat exchanger part.
[0018]
As shown in FIG. 3, the end plate 8 has a thickness t of 0.5 mm or more, has an approximately L-shaped cross section, forms an angle, and is on one side of the L shape facing the heat transfer fin 4. a plurality of insertion holes 8a 1 are bored, of the one side end on the other side perpendicular to this one side surface and the heat transfer tube 3 which is heat transfer tubes 3 of the inner stage heat exchanger unit 5b is inserted A plurality of elliptical long holes 8a2 are formed corresponding to the space of the U-shaped portion 3a, and a mounting projection 8c formed with a mounting screw hole 8b is formed at the lower end of the other side. Is provided. By setting the plate thickness of the end plate 8 to 0.5 mm or more, the end plate is not deformed even when the outdoor unit 1 of the air conditioner is dropped during transport. If the plate thickness is less than 0.5 mm, the end plate is deformed when dropped.
[0019]
Further, as shown in FIG. 4, the end plate 8 is screwed to the upright portion 2 c 1 of the bottom plate 2 c of the unit body 2 by a screw 9 that passes through the mounting screw hole 8 b. Thereby, even if the bending of the inner stage heat exchanger section 5b varies, the end plate 8 can reliably fix the inner stage heat exchanger section 5b in a predetermined position. In addition, the inner heat exchanger section 5b and the outer heat exchanger section 5c are tightly fixed to the heat transfer tubes 3 and the heat transfer fins 4 by expanding the heat transfer tubes 3 prior to bending. This tube expansion is a mechanical tube that holds and fixes the U-shaped portion 3b bottom (hairpin portion) of the heat transfer tube (U-shaped tube) 3 and the tube opening end and inserts a mandrel for tube expansion from the tube opening. A spreading method is preferred. This mechanical tube expansion method can reduce the contraction of the length of the heat transfer tube 3 after the tube expansion, and enables high quality and low cost.
[0020]
Conventionally, when an end plate is provided on the U-shaped portion 3b side of the heat transfer tube 3, it is difficult to hold and fix the U-shaped portion 3b during tube expansion, and therefore it is difficult to adopt a tube expansion method in which the length of the heat transfer tube 3 is small. Although there was a, as described above, by providing the elongated hole 8a 2 on the other side of the end plate 8, made possible. Long hole 8a 2 is not limited to the elliptical shape but may be any shape.
[0021]
As shown in FIGS. 2 and 5, an end plate 8 is interposed between the inner stage heat exchanger portion 5 b and the bell mouth 7 provided around the air outlet 2 b, so that the end plate 8 is disposed close to the end plate 8. The inner stage heat exchanger section 5 b does not interfere with the bell mouth 7. Further, since the end plate 8 and the bell mouth 7 are provided close to each other to form a substantially sealed state, the U-shaped part 3b of the inner stage heat exchanger part 5b and the outer stage heat exchanger part 5c are connected from the outlet 2b. A short circuit that flows back to the vicinity of the U-shaped part 3c is prevented, and the heat exchange performance in the vicinity of the step part 5a formed between the inner stage heat exchanger part 5b and the outer stage heat exchanger part 5c can be maximized. it can.
[0022]
In addition, the code | symbol 10 is a compressor which compresses a refrigerant | coolant, In this embodiment, it is accommodated in the unit main body 2, and forms the outdoor unit, but the outdoor unit of the air conditioner concerning this invention is Even if the compressor is stored in the unit main body, it may be installed outside the unit main body.
[0023]
Next, heat exchange of the outdoor unit of the air conditioner according to the present invention will be described.
[0024]
As shown in FIGS. 1 and 2, the air sucked from the suction port 2 a by the function of the electric fan 6 is heat-exchanged by the heat exchanger 5 and blown out of the unit body 2 from the blower outlet 2 b. In this heat exchange process, the suction port 2a and the stepped portion 5a become negative pressure due to the action of the electric fan 6, but the air flow is provided with an end plate 8 in the vicinity of the bell mouth 7 to form a substantially sealed state. As a result, there is no occurrence of a short circuit that flows backward from the outlet to the vicinity of the U-shaped portion of the heat exchanger as in the prior art, and backflow from the outlet to the vicinity of the U-shaped portion of the heat exchanger is prevented. Therefore, the heat exchange performance in the vicinity of the step portion 5a can be maximized.
[0025]
In addition, the effect of this invention can be anticipated also in multiple rows | lines, such as 3 rows or 4 rows, without restricting a heat exchanger to 2 rows.
[0026]
Moreover, 2nd Embodiment of the outdoor unit of the air conditioner concerning this invention is described.
[0027]
In the second embodiment, an end plate in which a bell mouth end storage cutout is formed on the end plate used in the first embodiment is used.
[0028]
For example, as shown in FIG. 6, the end plate 8 </ b> A has a plurality of insertion holes 8 </ b> Aa 1 into which the heat transfer tubes 3 of the inner stage heat exchanger section 5 b are inserted on one side of the L shape facing the heat transfer fins 4. are bored, on the other side perpendicular to this one side, with a plurality of long holes 8Aa 2 is provided, a bell mouth end housing notches 8Ad of the central portion trapezoidal shape is formed Furthermore, a mounting projection 8Ac in which a mounting screw hole 8Ab is drilled is provided at the lower end.
[0029]
Therefore, as shown in FIGS. 6 to 8, the notch 8Ad can increase the diameter of the fan 6A while keeping the substantially circular arc portion of the bell mouth 7A and the gap 11A between the end plates 8A. Thereby, the air volume at the same noise level is increased, and the heat exchange performance can be improved. The notch is not limited to a trapezoid, and may be any shape as long as it can avoid interference with the arc portion of the bell mouth.
[0030]
Since the other structure is not different from the outdoor unit of the air conditioner shown in FIG. 1, it attaches | subjects the same code | symbol and abbreviate | omits description.
[0031]
Moreover, 3rd Embodiment of the outdoor unit of the air conditioner concerning this invention is described.
[0032]
In the third embodiment, the outer stage heat exchanger part of the first embodiment is arranged in parallel with the flat upright portion of the bottom plate, whereas the outer stage heat exchanger part has a locking projection. It is designed to be pressed against the provided upright.
[0033]
For example, as shown in FIG. 9, the unit has locking protrusion 2Ba 2 is provided on the raised portion 2Ba1 of the bottom plate 2Ba body 2B, outer stage heat exchanger unit 5Bc heat exchanger 5B to the engaging protrusion 2Ba 2 Are in contact. Therefore, even if the outer stage heat exchanger part 5Bc tries to expand outward due to the spring back at the time of bending, the movement is suppressed and a gap with the inner stage heat exchanger part 5Bb is formed. Can be prevented, and the heat exchange efficiency can be improved. Further, since it is not necessary to provide a separate stopper for locking, the cost can be reduced.
[0034]
【Example】
Using the outdoor unit of the air conditioner according to the present invention, the thickness of the end plate used for the outdoor unit is changed from 0.1 to 0.3 mm every 0.1 mm, a drop test is performed, and the end plate is deformed. The presence or absence was investigated.
[0035]
Results: Shown in Table 1.
[0036]
[Table 1]
Figure 0003966750
[0037]
It was found that a thickness of 0.5 mm or more is necessary to eliminate the deformation of the end plate when dropped.
[0038]
【The invention's effect】
The outdoor unit for an air conditioner according to the present invention can provide an outdoor unit for an air conditioner that is compact, has high performance, and is inexpensive.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a first embodiment of an outdoor unit of an air conditioner according to the present invention.
FIG. 2 is an enlarged perspective view showing a portion A in FIG.
FIG. 3 is a perspective view of an end plate used in the first embodiment of the outdoor unit of the air conditioner according to the present invention.
FIG. 4 is a perspective view showing an attachment state of an end plate used in the first embodiment of the outdoor unit of the air conditioner according to the present invention.
FIG. 5 is an enlarged cross-sectional view showing a portion A in FIG. 1;
FIG. 6 is a perspective view of an end plate used in the second embodiment of the outdoor unit of the air conditioner according to the present invention.
FIG. 7 is an enlarged perspective view showing an end plate portion of a second embodiment of an outdoor unit of an air conditioner according to the present invention.
FIG. 8 is a conceptual diagram showing a portion of an end plate of a second embodiment of an outdoor unit of an air conditioner according to the present invention.
FIG. 9 is an enlarged cross-sectional view showing the vicinity of an end plate of a third embodiment of an outdoor unit of an air conditioner according to the present invention.
FIG. 10 is a conceptual diagram of an outdoor unit of a conventional air conditioner.
FIG. 11 is a conceptual diagram of an outdoor unit of a conventional air conditioner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 of air conditioner Unit main body 2a Suction inlet 2b Outlet 2c Bottom plate 2c1 Upright part 3 Heat transfer tube 3a U-shaped part 3b U-shaped part 4 Plate-shaped heat transfer fin 5 Heat exchanger 5a Step part 5b Inner stage heat exchange Unit 5c Outer stage heat exchanger unit 5c1 End 6 Heat exchange electric fan 7 Bell mouth 8 End plate 8a Insertion hole 8b Installation screw hole 8c Installation projection 9 Screw 10 Compressor

Claims (3)

吸込口と吹出口が設けられたユニット本体と、このユニット本体に収納され、伝熱管に所定の間隔を有して重合された多数の板状伝熱フィンを複数段に重ねその一部が湾曲した熱交換器と、この熱交換器に送風する電動ファンと、前記吹出口の周囲に設けられたベルマウスとを有する空気調和機の室外ユニットにおいて、
前記熱交換器は、少なくともその一部に各熱交換器部用として分割された分割フィンを含み、内側段熱交換器部と外側段熱交換器部間に段差部が設けられるように前記内側段熱交換器部から前記外側段熱交換器部に向かって短く形成され、
かつ、前記内側段熱交換器部の端部には、伝熱フィンと対面する一辺とこの一辺の内側縁から反伝熱フィン側に延びる他辺とからなる断面が略Ｌ字形状の端板が前記ベルマウスに近接するように取付けられ、
上記端板の他辺側に、上記一辺側の面と伝熱管のＵ字部間の空間に対応して孔を有することを特徴とする空気調和機の室外ユニット。A unit main body provided with a suction port and an air outlet, and a plurality of plate-shaped heat transfer fins, which are accommodated in the unit main body and polymerized with a predetermined interval, are stacked in a plurality of stages, and a part thereof is curved. In an outdoor unit of an air conditioner having a heat exchanger, an electric fan that blows air to the heat exchanger, and a bell mouth provided around the air outlet,
The heat exchanger includes, at least in part, divided fins divided for each heat exchanger part, and the inner part is provided such that a step part is provided between the inner stage heat exchanger part and the outer stage heat exchanger part. It is formed short from the stage heat exchanger part toward the outer stage heat exchanger part,
An end plate having a substantially L-shaped cross section consisting of one side facing the heat transfer fin and the other side extending from the inner edge of this side to the side opposite to the heat transfer fin is provided at the end of the inner stage heat exchanger section. Is attached so as to be close to the bell mouth,
An outdoor unit of an air conditioner having holes on the other side of the end plate corresponding to the space between the surface on the one side and the U-shaped portion of the heat transfer tube . 請求項１に記載の空気調和機の室外ユニットにおいて、上記端板は、他辺側にベルマウスとの接触を防ぐための切欠部を有することを特徴とする空気調和機の室外ユニット。The outdoor unit of an air conditioner according to claim 1, wherein the end plate has a notch for preventing contact with the bell mouth on the other side . 請求項１または２のいずれか１項に記載の空気調和機の室外ユニットにおいて、上記端板は、その板厚が０．５ｍｍ以上であることを特徴とする空気調和機の室外ユニット。  The outdoor unit of the air conditioner according to any one of claims 1 and 2, wherein the end plate has a thickness of 0.5 mm or more.
JP2002078022A 2002-03-20 2002-03-20 Air conditioner outdoor unit Expired - Fee Related JP3966750B2 (en)

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