JPS61280327A - Heat exchanging unit - Google Patents

Abstract

PURPOSE:To uniformize air speed distribution substantially to secure high heat exchanging efficiency and reduce noise by a method wherein the end section of a fan at the side of a supporting plate is surrounded by an annular air deflecting equipment to deflect high-speed blow-off air discharged from the side of the supporting plate. CONSTITUTION:The end section 31 of the fan at the side of supporting plate 13 is surrounded by the annular air deflecting equipment 30 to receive the air, discharged from the side of supporting plate 13, as shown by full line arrow sign in the diagram and deflect it downward obliquely. Accordingly, air speed at the side of upper part of the heat exchanger 21 is decreased and the same at the lower part of the heat exchanger 21 is increased whereby the air speed distribution is uniformed substantially and the heat exchanging efficiency is improved. Further, the air speed of high-temperature discharging air itself, discharged from the side of the supporting plate 13, is reduced in case the air is deflected by a slanted plate 34, therefore, collision of the air against the central part 43 of the heat exchanger 21 may be mitigated and noise may be reduced.

Description

【発明の詳細な説明】 （イ）産業上の利用分野 本発明は天井埋込型や天井吊型、もしくは壁掛型の空気
調和ユニット等に適した熱交換ユニットに関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a heat exchange unit suitable for a ceiling-embedded, ceiling-suspended, or wall-mounted air conditioning unit.

（ロ）従来の技術 片吸込みの遠心型ファンと、このファンの空気吸込側に
配置される熱交換器とを内蔵した３方向吹き出しタイプ
の壁掛型空気調和機が実開昭５５−９６３２９号公報で
提案されている。(B) Conventional technology A wall-mounted air conditioner of three-way outlet type that incorporates a single-suction centrifugal fan and a heat exchanger placed on the air suction side of the fan is disclosed in Utility Model Application Publication No. 55-96329. is proposed.

（ハ）発明が解決しようとする問題点 提案された上述の従来構造では熱交換器と遠心型ファン
とが前後方向に並んでいる為に空気調和機の奥行寸法が
長くなり薄型化に限界があった。(c) Problems to be solved by the invention In the proposed conventional structure described above, the heat exchanger and centrifugal fan are lined up in the front and back direction, which increases the depth of the air conditioner and limits how thin it can be made. there were.

この為、遠心型ファンの空気吐出側にこのファンを囲む
Ｕ字状の熱交換器を配置して薄型化を図ったもので試み
られているが、遠心型ファンから吐出される吐出空気の
風速分布が均一でないので熱交換効率が劣ると共に速い
吐出空気が熱交換器のフィンに衝突して騒音が発生する
問題点があった。For this reason, attempts have been made to reduce the thickness of the centrifugal fan by placing a U-shaped heat exchanger surrounding the fan on the air discharge side, but the speed of the discharged air from the centrifugal fan Since the distribution is not uniform, there are problems in that the heat exchange efficiency is poor and the fast discharged air collides with the fins of the heat exchanger, causing noise.

本発明はかかる問題点を解決した熱交換ユニットを提供
するものである。The present invention provides a heat exchange unit that solves these problems.

に）問題点を解決するための手段 本発明は、多数の羽根とこの羽根を支える支持板とから
なる片吸込みの遠心型ファンと、このファンの吐出側通
風路中にこのファンを囲むよ５１Ｃ配設される熱交換器
とを内蔵した熱交換ユニットに、支持板側のファン端部
を囲む環状の風向変更具を股げるようにしたものである
。B) Means for Solving the Problems The present invention provides a single-suction centrifugal fan consisting of a large number of blades and a support plate that supports the blades, and a fan that surrounds the fan in its discharge side air passage. An annular airflow direction changer surrounding the end of the fan on the support plate side is straddled over a heat exchange unit that includes a built-in heat exchanger.

（ホ）作用 本発明は片吸込みの遠心型ファンから全周方向へ吐出さ
れる吐出空気のうち、このファンの支持板側から吐出さ
れる吐出空気の速度が最も速いことに着目し、支持板側
のファン端部を環状の風向変更具で囲むようにしたので
、支持板側からの高速吐出空気が風速の遅い熱交換器の
中央側へ変向されて風速分布が略均−になると共にこの
変向時に高速の吐出空気の速度が下がって熱交換器との
衝突が和らぐようになる。(E) Function The present invention focuses on the fact that among the air discharged in the circumferential direction from a single-suction centrifugal fan, the speed of the discharge air discharged from the support plate side of this fan is the fastest. Since the end of the side fan is surrounded by an annular wind direction changer, the high-speed discharge air from the support plate side is diverted to the center side of the heat exchanger where the wind speed is slow, and the wind speed distribution becomes approximately uniform. During this change in direction, the velocity of the high-speed discharged air is reduced, and the collision with the heat exchanger is reduced.

（へ）実施例 天井埋込型空気調和ユニットを例にとって説明すると、
第１図は本発明ユニットの縦断面図、第２図は第１図に
おける■−■矢視のユニットの横断面図であり、内壁に
断熱材（１）（２）を貼着した板金製のユニット本体（
３）と、中央に吸込グリル（４）を、外周部の４辺に吹
出口（５１（６）（７）（８）を設けた化粧パネル（９
）とから構成されている。(f) Example To explain the ceiling-embedded air conditioning unit as an example,
Fig. 1 is a longitudinal cross-sectional view of the unit of the present invention, and Fig. 2 is a cross-sectional view of the unit taken along the ■-■ arrow in Fig. 1. unit body (
3) and a decorative panel (9) with a suction grill (4) in the center and air outlets (51 (6) (7) (8) on the four sides of the outer periphery).
).

（１０）は多数の羽根αυとこの羽根を環状の側板０２
との間で支える支持板α■とからなる片吸込みの遠心型
ファンで、第２図に示す破線矢印の方向圧回転されて実
線矢印の如く全周方向から空気を吐出するターボファン
が用いられている。（１４）は吸込グリル（４）カラの
室内空気をこのターボファン（１０）Ｋ：吸入案内する
ノズル口、（Ｂ　＋−ｉノズル板（１，６）　Ｋ支持脚
ａηで取り付けられたファン用モータ、（１唱マ内側立
ち上がり部ａ優と外側立ち上がり部（２０とを有し角張
った環形状に発泡スチロールで成形されたドレンパンで
ある。(10) is a large number of blades αυ and these blades are connected to an annular side plate 02.
This is a single-suction centrifugal fan consisting of a supporting plate α■ supported between the fan and the turbo fan, which is rotated under pressure in the direction indicated by the dashed arrow shown in Figure 2 and discharges air from the entire circumference as shown by the solid arrow. ing. (14) is the suction grill (4) empty indoor air to this turbo fan (10) This drain pan is made of polystyrene foam and has an angular ring shape with a motor, an inner rising part (a) and an outer rising part (20).

又、０υはターボファン顛から全周方向へ空気が吐出さ
れるユニット本体（３）の通風路（２湯中にこのファン
を囲むように配設された熱交換器で、角張った環状の針
状フィンＱ漕付きの熱交換コイル（２４）で形成されて
いる。そして熱交換器Ｑυはドレンパン鱈とシール材（
ハ）との間に介在されることによりターボファン０〔か
ら吐出される一次側空気と吹出口（５）（６）（力（８
）から吐出される二次側空気とを熱交換器（２１）で完
全に分離させている。（２６）（２７）＠　（２１はド
レンパンＱａの外側４面を内方に窪ませて吹出口ｆ５）
（６）（力（８）と連通させた吹出通路である。In addition, 0υ is the ventilation passage of the unit body (3) where air is discharged from the turbo fan body in the entire circumferential direction (2) The heat exchanger is placed in the hot water to surround this fan, and the angular annular needle It is formed of a heat exchange coil (24) with a shaped fin Q column.The heat exchanger Qυ is made up of a drain pan cod and a sealing material (24).
C) is interposed between the primary air discharged from the turbo fan 0 and the air outlet (5) (6) (force (8)
) is completely separated from the secondary air discharged from the heat exchanger (21). (26) (27) @ (21 is the outlet f5 by recessing the four outer sides of the drain pan Qa inward)
(6) (This is a blowout passage that communicates with force (8).

（至）は支持板α１側のファン端部Ｓυを囲む環状の風
向変更具で、断熱材（２）を介して天板０秒に螺子止め
される円形状の平板部制と、この平板部の周囲より裾広
がり状に下降傾斜した傾斜板部（財）と、この傾斜板部
の下縁より水平方向に張り出した張出板部０９とが板金
材で一体絞りにより形成されたものである。(to) is an annular wind direction changer surrounding the fan end Sυ on the side of the support plate α1, which includes a circular flat plate part that is screwed to the top plate 0 seconds through the heat insulating material (2), and this flat plate part. An inclined plate part (goods) that slopes downward in a widening manner from the periphery of the plate, and an overhanging plate part 09 that extends horizontally from the lower edge of this inclined plate part are formed by integral drawing of sheet metal material. .

０６）（至）はユニット本体（３）を天井板（３７）の
天井穴（財）から天井空間端内に押し込んで天井梁（４
０へ吊り下げ固定する為の吊りボルトである。06) (To) Push the unit body (3) into the ceiling space edge through the ceiling hole (material) of the ceiling board (37) and attach it to the ceiling beam (4).
This is a hanging bolt for hanging and fixing to 0.

以上の如く構成されており、吸込グリル（４）からノズ
ルロα荀を経てターボファン（１１）内に吸入された室
内空気は高い静圧のもとで実線矢印の如くターボファン
００）から全周方向へ湾曲しながら吐出されるが、静圧
はターボファンＱＯ）の奥行方向にそって高い為に羽根
α１）から吐出される吐出空気の速度は支持板０３）側
が最も速く、側板（１２側が最も遅い風速分布となって
いる。かかる風速分布のもとで冷房運転を行なうと熱交
換器０υの上部側パイプ（４υ内を流れる液冷媒は高速
吐出空気と熱交換されて過熱″　　　気味のガス状冷媒
になると共に下部側パイプ（４２内を流れる液冷媒は低
速吐出空気との熱交換で充分に蒸発しきれず、熱交換効
率が劣ってしまう。又、暖房運転の場合も、熱交換器（
２１）の上部側パイプ（４１）内を流れるガス冷媒は高
速吐出空気と熱交換されて過冷却気味に凝縮されると共
に下部側パイプ（４り内を流れるガス冷媒は低速吐出空
気との熱交換で充分に凝縮しきれず、熱交換効率が劣っ
てしまう。The structure is as described above, and indoor air is drawn into the turbo fan (11) from the suction grill (4) through the nozzle roller α under high static pressure from the turbo fan 00) all around as shown by the solid arrow. However, since the static pressure is higher along the depth direction of the turbofan QO), the velocity of the discharged air discharged from the blade α1) is fastest on the support plate 03) side, and on the side plate (12) side. This is the slowest wind speed distribution.If you perform cooling operation under such a wind speed distribution, the liquid refrigerant flowing through the upper pipe of the heat exchanger (0υ) (4υ) will exchange heat with the high-speed discharge air and produce a slightly overheated gas. The liquid refrigerant flowing through the lower pipe (42) cannot be sufficiently evaporated due to heat exchange with the low-velocity discharge air, resulting in poor heat exchange efficiency.Also, in heating operation, the heat exchanger (42)
The gas refrigerant flowing in the upper pipe (41) of the lower pipe (41) exchanges heat with the high-speed discharge air and condenses to a slightly supercooled state, while the gas refrigerant flowing in the lower pipe (41) exchanges heat with the low-speed discharge air. It cannot be condensed sufficiently, resulting in poor heat exchange efficiency.

しかも、この冷暖房運転時、支持板α３）側の高速吐出
空気が近接している熱交換器（２υの上部側フィンに勢
い良く衝突して騒音が発生することになる。Moreover, during this cooling/heating operation, the high-speed discharge air from the support plate α3) collides with the upper fins of the adjacent heat exchanger (2υ), causing noise.

これに対し、環状の風向変更具（７）で支持板０３）側
のファン端部０１）を囲むことにより、支持板０３）側
から吐出される高温吐出空気は第１図に示す実線矢印の
如く傾斜板部０４）で受けられて斜め下方へ変向される
ので熱交換器ｌ２Ｉ）の上部側の風速が下がると共に下
部側の風速が上がって風速分布が略均−になり、熱交換
効率が向上するようになる。しかも支持板０３）側から
の高温吐出空気そのものが傾斜板部（財）で変向される
際に風速が下がるので熱交換器（２１）の中央部（４■
との衝突が和らぎ、騒音が低下するようになる。この騒
音の低下は第３図、第４図の実験結果から立証され、風
向変更具（至）のない場合は第３図に細線で示すように
２５０　ＫＨｚ付近で非常に耳ざわりな音が発生したの
に対し、風向変更具（至）を用いた場合は太線で示すよ
うにこの耳ざわりな音が消え、第４図に実線（風向変更
具あり）と破線（風向変更具なし）で示すように騒音が
低下することが確認された。On the other hand, by surrounding the fan end 01) on the support plate 03) side with an annular wind direction changer (7), the high temperature discharged air discharged from the support plate 03) side can be adjusted as indicated by the solid line arrow in Fig. 1. As the wind is received by the inclined plate part 04) and deflected diagonally downward, the wind speed on the upper side of the heat exchanger l2I) decreases and the wind speed on the lower side increases, making the wind speed distribution approximately equal, increasing the heat exchange efficiency. will improve. Moreover, when the high-temperature discharged air itself from the support plate 03) side is changed direction by the inclined plate part, the wind speed decreases, so the central part of the heat exchanger (21)
The collision with the vehicle will be alleviated and the noise will be reduced. This reduction in noise is proven by the experimental results shown in Figures 3 and 4. Without the wind direction changer, a very harsh sound was generated around 250 KHz, as shown by the thin line in Figure 3. On the other hand, when the wind direction changer (to) is used, this harsh sound disappears as shown by the bold line, and as shown in Figure 4 by the solid line (with the wind direction changer) and the broken line (without the wind direction changer). It was confirmed that noise was reduced.

尚、上記実施例と異なり、Ｕ字状の熱交換器を用いた３
方向吹出しタイプのユニットにも適用でき、又、遠心型
ファンとしてはターボファンの代わりにラジアルファン
を用いても良い。Note that, unlike the above embodiment, the 3
It can also be applied to a directional blow-out type unit, and a radial fan may be used instead of a turbo fan as the centrifugal fan.

（ト）　　発明の効果 本発明は片吸込み遠心型ファンにおける支持板側のファ
ン端部を環状の風向変更具で囲むようにしたので、支持
板側から吐出される高速吐出空気が変向されて風速分布
が略均−になり、高い熱交換効率を確保することができ
ると共に騒音を低下させることができる。(G) Effects of the Invention In the present invention, the end of the fan on the support plate side of a single-suction centrifugal fan is surrounded by an annular wind direction changer, so that the high-speed discharge air discharged from the support plate side is changed in direction. The wind speed distribution becomes approximately uniform, high heat exchange efficiency can be ensured, and noise can be reduced.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明ユニットの縦断面図、第２図は第１図に
おける■−■矢視のユニット横断面図、第３図は周波数
−バンドレベルの特性図、第４図は風量−騒音の特性図
である。 αＱ・・・遠心型ファン（ターボファン）、Ｑｌ）・・
・羽根、　０３）・・・支持板、　Ｃ２０）・・・熱交
換器、　Ｑ邊・・・通風路、　（至）・・・風向変更具
、　６υ・・・ファン端部。 出願人　三洋電機株式会社　外１名 代理人　弁理士　　佐　野　静　夫 第２図 第３図 用′ｌＬ’ＩＩ　（Ｈ３）− 第４図Fig. 1 is a longitudinal cross-sectional view of the unit of the present invention, Fig. 2 is a cross-sectional view of the unit taken along the ■-■ arrow in Fig. 1, Fig. 3 is a frequency-band level characteristic diagram, and Fig. 4 is an air volume-noise diagram. FIG. αQ...Centrifugal fan (turbo fan), Ql)...
・Blade, 03)...Support plate, C20)...Heat exchanger, Q section...Ventilation path, (to)...Wind direction changing device, 6υ...Fan end. Applicant Sanyo Electric Co., Ltd. and one other representative Patent attorney Shizuo Sano Figure 2 for Figure 3 'lL'II (H3) - Figure 4

Claims (1)

【特許請求の範囲】[Claims] （１）多数の羽根とこの羽根を支える支持板とからなる
片吸込みの遠心型ファンと、このファンの吐出側通風路
中にこのファンを囲むように配設される熱交換器と、前
記支持板側のファン端部を囲む環状の風向変更具とを備
えたことを特徴とする熱交換ユニット。(1) A single-suction centrifugal fan consisting of a large number of blades and a support plate that supports the blades, a heat exchanger disposed in a ventilation passage on the discharge side of the fan so as to surround the fan, and the support plate. A heat exchange unit characterized by comprising: an annular wind direction changing device surrounding a fan end on a plate side.