JPH0760010B2 - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH0760010B2 JPH0760010B2 JP7248288A JP7248288A JPH0760010B2 JP H0760010 B2 JPH0760010 B2 JP H0760010B2 JP 7248288 A JP7248288 A JP 7248288A JP 7248288 A JP7248288 A JP 7248288A JP H0760010 B2 JPH0760010 B2 JP H0760010B2
- Authority
- JP
- Japan
- Prior art keywords
- air
- fan
- front plate
- ribs
- casing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Air-Flow Control Members (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、空気調和機に関するものである。TECHNICAL FIELD The present invention relates to an air conditioner.
従来の技術 従来、クロスフローファンを有する空気調和機において
は、サージングを防止するためにさまざまな工夫がなさ
れて来た。2. Description of the Related Art Conventionally, in an air conditioner having a cross flow fan, various measures have been taken to prevent surging.
以下図面を参照しながら、上述した従来の空気調和機の
一例について説明する。An example of the above-described conventional air conditioner will be described below with reference to the drawings.
第４図は従来のクロスフローファンを有する空気調和機
の通風回路の構造を示す。図に示すように、吸込側には
吸込グリル５、熱交換器６等を有し、クロスフローファ
ン１、ケーシング前板２、ケーシング後板３等により通
風回路を構成している。また、クロスフローファン１は
適数個のファンブロック10を連接して長尺ファンロータ
を形成している。FIG. 4 shows the structure of a ventilation circuit of an air conditioner having a conventional cross flow fan. As shown in the drawing, the suction side has a suction grill 5, a heat exchanger 6, and the like, and a crossflow fan 1, a casing front plate 2, a casing rear plate 3, and the like constitute a ventilation circuit. Further, the cross flow fan 1 has a proper number of fan blocks 10 connected to each other to form a long fan rotor.
発明が解決しようとする課題 しかしながら上記第５図の構成では、クロスフローファ
ン１のファンローターが長いため、ファン空気吸入口の
上流側に配置されている種々の機器（たとえば熱交換器
６等）あるいは空気流通路のケーシング（たとえばケー
シング前板2,ケーシング後板３等）の形状等によってフ
ァン吸込側の空気抵抗分布がクロスフローファン１の全
長にそって不均一となり、クロスフローファン１の回転
時には吸入空気抵抗の大きい部分からの風量が該抵抗の
小さい部分からの風量より少く、更に最初小規模の風量
の不均衡が発生すると以後は大風量からの風が小風量の
部分からの風を誘引してその風量差は益々拡大するよう
になる。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the configuration shown in FIG. 5, since the fan rotor of the crossflow fan 1 is long, various devices (for example, the heat exchanger 6) arranged upstream of the fan air intake port. Alternatively, due to the shape of the casing of the air flow passage (for example, the casing front plate 2, the casing rear plate 3, etc.), the air resistance distribution on the fan suction side becomes non-uniform along the entire length of the cross flow fan 1, and the rotation of the cross flow fan 1 Sometimes the air volume from the part with a large intake air resistance is smaller than the air volume from the part with a small air resistance, and when an imbalance of the small-scale air volume occurs at first, the wind from the large air volume will change the air from the small air volume portion thereafter. By attracting the air, the difference in air flow will become wider.
ところで上述の経過によってある特定部分の風量が第６
図の特性曲線上のＰ点以下になると該部分はいわゆる不
安定領域で運転されることとなりサージング現象が発生
してクロスフローファン全体が振動および騒音を発する
ことが実験的に知られている。By the way, the air volume of a certain part is
It is empirically known that when the temperature becomes equal to or lower than the point P on the characteristic curve in the figure, the portion is operated in a so-called unstable region, a surging phenomenon occurs, and the entire crossflow fan emits vibration and noise.
ここでいう「不安定領域」とは第７図の特性曲線上のＰ
点より左側の部分のように風量の減少につれて静圧が減
少する領域をいうものである。The "unstable region" referred to here is P on the characteristic curve of FIG.
It is a region where the static pressure decreases as the air volume decreases, such as the part on the left side of the point.
ここでは風量が減少すれば静圧が減少しファンには風量
が減少する方向に力が働くので風量の変動を助長する方
向に力が働く。従ってこの領域では一旦風量の変動が起
ると安定しない。また第６図の「安定領域」とは特性曲
線上のＰ点より右側の部分のように、風量が増大すれば
静圧が減少し、風量が減少すれば静圧が増大する領域を
いい、ファンは負荷の状態により任意の静圧、風量を有
する一点において負荷とバランスして安定運転を行うも
のである。Here, if the air volume decreases, the static pressure decreases, and the force acts on the fan in the direction in which the air volume decreases. Therefore, the force acts in the direction that promotes the fluctuation of the air volume. Therefore, once the air volume fluctuates in this region, it is not stable. Further, the “stable region” in FIG. 6 is a region on the right side of the point P on the characteristic curve, where the static pressure decreases as the air volume increases, and the static pressure increases as the air volume decreases, The fan balances the load at a single point having an arbitrary static pressure and air volume depending on the load state to perform stable operation.
本発明は上記課題に鑑み、空気調和機のサージングを防
止することを目的とするものである。The present invention has been made in view of the above problems, and an object thereof is to prevent surging of an air conditioner.
課題を解決するための手段 上記課題を解決するために本発明は、クロスフローファ
ン，ケーシング前板，ケーシング後板とから通風回路を
構成し、前記ケーシング前板の吹出側の両端部のみに高
さ，巾，取付ピッチが均一なリブを形成しかつ、前記リ
ブのうち一部分についてはリブ高さを前記リブよりも高
く形成したものである。Means for Solving the Problems In order to solve the above problems, the present invention configures a ventilation circuit including a crossflow fan, a casing front plate, and a casing rear plate, and a high level is provided only at both ends on the outlet side of the casing front plate. A rib having a uniform width, width, and mounting pitch is formed, and a part of the rib has a rib height higher than that of the rib.
作用 本発明は上記した構成により、仮りにクロスフローファ
ンの吸込口の上流側に吸込抵抗の不均一分布が存在して
も、長尺ファンロータの軸方向に偏流が発生することが
ない。Effect of the Invention With the above-described configuration, even if there is a non-uniform distribution of the suction resistance on the upstream side of the suction port of the cross flow fan, uneven flow does not occur in the axial direction of the long fan rotor.
実施例 以下、本発明の一実施例を添付図面の第１図から第３図
を参考に説明する。Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 3 of the accompanying drawings.
第１図はセパレート型空気調和機の室内機の内部断面図
である。FIG. 1 is an internal cross-sectional view of an indoor unit of a separate type air conditioner.
同図で示すように、吸込側には吸込グリル５、熱交換器
６等があり、クロスフローファン１、ケーシング前板
２、ケーシング後板３により通風回路を構成している。
ケーシング前板２の吹出側内面には本発明のリブ４が形
成されている。また吹出側には、上下偏向羽根７、左右
偏向羽根８が取付けられている。As shown in the figure, there are a suction grill 5, a heat exchanger 6, etc. on the suction side, and the crossflow fan 1, the casing front plate 2 and the casing rear plate 3 form a ventilation circuit.
A rib 4 of the present invention is formed on the inner surface of the casing front plate 2 on the outlet side. Further, a vertical deflection blade 7 and a horizontal deflection blade 8 are attached to the outlet side.
第２図は第１図の吹出口部分の拡大斜視図である。同図
に示すようにリブ４がケーシング前板２の吹出側内面の
全域に形成されている。FIG. 2 is an enlarged perspective view of the air outlet portion of FIG. As shown in the figure, ribs 4 are formed on the entire blow-out side inner surface of the casing front plate 2.
第３図は第２図のＡ−Ａ断面ならびにＢ−Ｂ断面の拡大
図である。同図に示すように、領域Ｘにおいてはリブ４
はケーシング前板２の内面より高さh1、巾ｔ、長さｌの
大きさであり、リブとリブは等ピッチ間隔Ｐで一体成形
されている。また、領域Ｙについては、リブの巾，長
さ，取付ピッチは領域Ｘと同一であり、リブ高さのみが
h2で一体成形されている（h1＜h2）。FIG. 3 is an enlarged view of an AA cross section and a BB cross section of FIG. As shown in the figure, in the region X, the rib 4
Has a height h 1 , a width t, and a length 1 from the inner surface of the casing front plate 2, and the ribs are integrally formed at equal pitch intervals P. Further, in the region Y, the rib width, length, and mounting pitch are the same as those in the region X, and only the rib height is
It is integrally molded with h 2 (h 1 <h 2 ).
この構成によれば、リブ４がない場合クロスフローファ
ン１の吸込側の通風抵抗がフィルターの目づまり等によ
り増大した場合のクロスフローファン１の中央部から吸
込空気抵抗の小さい両端部に向って偏流Ｗ（矢印で示
す）が発生しようとし、ひいては前述したサージング現
象を発生するのに対し、空気抵抗の小さい区域（両端
部）に対応してその下流となる位置領域Ｙに領域Ｘより
もリブ高さの高いリブ４′を取付けているため空気吹出
通路９の通風面積を狭め絞ることになり、吸込空気抵抗
の大きい方から小さい方への偏流Ｗの発生を防ぎ、その
結果サージング現象の発生を防止できる。According to this configuration, in the case where the rib 4 is not provided, the airflow resistance on the suction side of the crossflow fan 1 increases from the central portion of the crossflow fan 1 toward the both ends where the suction air resistance is small when the filter is clogged or the like. A drift W (indicated by an arrow) tends to occur, which in turn causes the surging phenomenon described above, while ribs are formed in the position area Y downstream of the area (both ends) having a small air resistance rather than the area X. Since the ribs 4'having a high height are attached, the ventilation area of the air outlet passage 9 is narrowed and narrowed, and the generation of the drift W from the one having a large suction air resistance to the one having a small suction air resistance is prevented, resulting in the occurrence of the surging phenomenon. Can be prevented.
また、従来サージングが生じた場合、対策として角形の
ポリエチ等を貼りつけていたのに対し、リブ４はケーシ
ング前板２と一体成形であるためコストならびにポリエ
チを貼る工数を下げることができる。さらにリブ４の巾
ｔを広く取り面とした場合成形時ひけを生じるが、リブ
４の巾ｔをひけの生じない最大寸法におさえているた
め、その心配もない。さらに前板２にリブ４を取付ける
事により空気吹出通路９の通風面積を狭め絞るため吹出
側の乱れを極力抑制できるため吹出騒音の上昇も最低限
に抑える事ができるものである。Further, in the case where surging has occurred in the past, as a countermeasure, a polygonal polyethylene or the like was attached, whereas the rib 4 is integrally formed with the casing front plate 2, so that the cost and the number of steps for attaching the polyethylene can be reduced. Further, when the width t of the rib 4 is wide, the sink mark is generated at the time of molding. However, since the width t of the rib 4 is set to the maximum dimension that does not cause the sink mark, there is no fear of that. Further, by mounting the ribs 4 on the front plate 2, the ventilation area of the air outlet passage 9 is narrowed and narrowed, so that the turbulence on the outlet side can be suppressed as much as possible, and the rise of the outlet noise can be suppressed to the minimum.
発明の効果 以上のように、本発明の空気調和機は、ファンの軸流方
向の偏流を防ぎ、その結果サージング現象の発生を防止
し、騒音や振動のない静かで且つ安定した空気調和機の
運転を可能とする。Effects of the Invention As described above, the air conditioner of the present invention prevents uneven flow in the axial direction of the fan, thereby preventing the occurrence of the surging phenomenon, and of a quiet and stable air conditioner without noise or vibration. Enables driving.
第１図は本発明の一実施例におけるセパレート型空気調
和機の室内ユニットの内部断面図、第２図は同室内ユニ
ットの吹出口部分の拡大斜視図、第３図は同吹出口部分
のＡ−Ａ線断面図及びＢ−Ｂ線断面図、第４図は従来の
室内ユニットの内部断面図、第５図はクロスフローファ
ンの平面図、第６図はクロスフローファンの特性図であ
る。 １……クロスフローファン、２……ケーシング前板、３
……ケーシング後板、４……リブ、５……熱交換器。FIG. 1 is an internal cross-sectional view of an indoor unit of a separate type air conditioner according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view of an air outlet of the indoor unit, and FIG. 3 is an A of the air outlet. -A line sectional view and BB sectional view, FIG. 4 is an internal sectional view of a conventional indoor unit, FIG. 5 is a plan view of a crossflow fan, and FIG. 6 is a characteristic diagram of the crossflow fan. 1 ... Cross flow fan, 2 ... Casing front plate, 3
...... Casing back plate, 4 ... ribs, 5 ... heat exchanger.
Claims (1)
ーシング後板とから通風回路を構成し、前記ケーシング
前板の吹出側の全域に高さ，巾，取付ピッチが均一なリ
ブを形成し、かつ前記リブのうち、前記ケーシング前板
の吹出側両端部におけるリブの高さが、中央部における
リブの高さと比較して高く形成したことを特徴とする空
気調和機。1. A ventilation circuit comprising a cross flow fan, a casing front plate, and a casing rear plate, wherein ribs having a uniform height, width, and mounting pitch are formed on the entire blowing side of the casing front plate. An air conditioner characterized in that, of the ribs, the height of the ribs at both end portions of the front plate of the casing on the outlet side is higher than the height of the ribs at the central portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7248288A JPH0760010B2 (en) | 1988-03-25 | 1988-03-25 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7248288A JPH0760010B2 (en) | 1988-03-25 | 1988-03-25 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01244240A JPH01244240A (en) | 1989-09-28 |
| JPH0760010B2 true JPH0760010B2 (en) | 1995-06-28 |
Family
ID=13490584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7248288A Expired - Fee Related JPH0760010B2 (en) | 1988-03-25 | 1988-03-25 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0760010B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5402616B2 (en) * | 2009-12-24 | 2014-01-29 | 株式会社富士通ゼネラル | Air conditioner |
-
1988
- 1988-03-25 JP JP7248288A patent/JPH0760010B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01244240A (en) | 1989-09-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |