JPH083385B2 - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH083385B2 JPH083385B2 JP63072480A JP7248088A JPH083385B2 JP H083385 B2 JPH083385 B2 JP H083385B2 JP 63072480 A JP63072480 A JP 63072480A JP 7248088 A JP7248088 A JP 7248088A JP H083385 B2 JPH083385 B2 JP H083385B2
- Authority
- JP
- Japan
- Prior art keywords
- air
- fan
- cross flow
- front plate
- 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 - Lifetime
Links
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。Hereinafter, an example of the above-described conventional air conditioner will be described 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。同図に示すように、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、第５図に示すように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 figure, the suction side has a suction grill 5, a heat exchanger 6 and the like, and a cross flow fan 1, a casing front plate 2, a casing rear plate 3 and the like constitute a ventilation circuit. Further, as shown in FIG. 5, 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４図の構成では、クロスフローフ
ァン１のファンロータが長いため、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
ファン吸個側の空気抵抗分布がクロスフローファンの全
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。However, in the configuration shown in FIG. 4, since the fan rotor of the cross flow fan 1 is long, various devices (for example, the heat exchanger 6) arranged upstream of the fan air intake port. Alternatively, the air resistance distribution on the fan suction side becomes non-uniform along the entire length of the cross flow fan 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.), and the cross flow fan 1 At the time of rotation, the air volume from the part with high intake air resistance is smaller than the air volume from the part with low resistance, and when a small-scale air volume imbalance first occurs, the air 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, when the air flow rate of a specific portion becomes equal to or lower than the point P on the characteristic curve of FIG. 6 due to the above-mentioned process, the portion is operated in a so-called unstable region, and a surging phenomenon occurs and the entire cross flow fan vibrates and It is experimentally known to emit noise.
ここでいう「不安定領域」とは第６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 a region where the static pressure decreases as the air volume decreases, such as the portion on the left side of point P on the characteristic curve in FIG.
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。また、一般にクロスフローファンの両端部
では、風量が少ない為静圧が小さく風量の不均衡が生じ
易く、フィルターの目づまり等で通風抵抗が増大した場
合にサージング等の原因となるものであった。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 condition to perform stable operation. Further, generally, at both ends of the cross flow fan, the static pressure is small because the air volume is small, and the imbalance of the air volume is likely to occur, which causes surging when the ventilation resistance increases due to clogging of the filter. .
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一部に、高
さ、幅、取付ピッチが均一な複数のリブをクロスフロー
ファンに対して直角方向に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 from a crossflow fan, a casing front plate, and a casing rear plate, and a part of the outlet side of the casing front plate has a high height. A plurality of ribs having a uniform width, a uniform mounting pitch, are formed in a direction perpendicular to the cross flow fan.
また、リブを特に両端部に設けたものである。 Further, ribs are provided especially at both ends.
作用 本発明は上記した構成により、仮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、ケーシング前板に設けたリブにより静圧が増加し、
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 The present invention has the above-described configuration, and even if there is a non-uniform distribution of suction resistance on the upstream side of the suction port of the cross flow fan, static pressure increases due to the ribs provided on the casing front plate,
No drift is generated 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 now be described with reference to FIGS. 1 to 3 of the accompanying drawings.
Description will be given with reference to the 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.
同図に示すように、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
に形成されている（この図ではリブ４は吸込空気抵抗の
小さい吹出側両端部につけられている）。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 inner surface of the casing front plate 2 on the outlet side (in this figure, the ribs 4 are attached to both ends of the outlet side where the suction air resistance is low).
第３図は第２図のＡ−Ａ断面の拡大図である。同図に
示すように、リブ４はケーシング前板２の内面より高さ
ｈ、幅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。FIG. 3 is an enlarged view of the AA cross section of FIG. As shown in the figure, the ribs 4 have a size of height h, width t, and length l from the inner surface of the casing front plate 2, and the ribs are integrally formed at equal pitch intervals p.
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の吸入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、リブ４があるため空気抵抗の小
さい区域（両端部）に対応してその下流となる位置に空
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, when there is no rib 4, when the ventilation resistance on the suction side of the crossflow fan 1 increases due to the clogging of the filter, etc., the current flows unevenly from the center of the crossflow fan 1 toward both ends where the suction air resistance is low. W (indicated by an arrow) tends to occur, which in turn causes the surging phenomenon described above, whereas the rib 4 has a rib 4 and is located at a position downstream of the area (both ends) having a small air resistance. Since the ventilation area of 9 is narrowed and narrowed, it is possible to prevent the occurrence of the uneven flow W from the one having a large suction air resistance to the one having a small suction air resistance, and as a result, it is possible to prevent the occurrence of the surging phenomenon.
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
幅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の幅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。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. Furthermore, when the width t of the rib 4 is set to be a wide surface, sink marks are generated during molding,
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.
発明の効果 以上のように、本発明は、前記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
可能とするものである。Effects of the Invention As described above, the present invention prevents uneven flow in the axial direction of the fan, thereby preventing the occurrence of a surging phenomenon, and enabling quiet and stable operation of the air conditioner without noise or vibration. It is what
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、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……吸込グリル、
６……熱交換器、７……上下偏向羽根、８……左右偏向
羽根、９……吹出通路。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, 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 view of the crossflow fan. 1 ... Cross flow fan, 2 ... Casing front plate, 3
...... Casing back plate, 4 ... ribs, 5 ... suction grill,
6 ... Heat exchanger, 7 ... Vertical deflection blades, 8 ... Horizontal deflection blades, 9 ... Outlet passage.
Claims (2)
ーシング後板とから通風回路を構成し、前記ケーシング
の前板の吹出側の一部に、高さ、巾、取付ピッチが均一
な複数のリブを前記クロスフローファンに対し直角方向
に形成した空気調和機。1. A cross flow fan, a casing front plate, and a casing rear plate constitute a ventilation circuit, and a plurality of ribs having a uniform height, width, and mounting pitch are provided on a part of the front plate of the casing on the outlet side. An air conditioner in which is formed in a direction perpendicular to the cross flow fan.
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に、高さ、巾、取付ピッチが均一
な複数のリブを前記クロスフローファンに対して直角方
向に形成した空気調和機。2. A ventilation circuit comprising a cross flow fan, a casing front plate and a casing rear plate, and a plurality of ribs having a uniform height, width and mounting pitch are provided at both ends of the casing front plate on the outlet side. An air conditioner formed in a direction perpendicular to the cross flow fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63072480A JPH083385B2 (en) | 1988-03-25 | 1988-03-25 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63072480A JPH083385B2 (en) | 1988-03-25 | 1988-03-25 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01244238A JPH01244238A (en) | 1989-09-28 |
| JPH083385B2 true JPH083385B2 (en) | 1996-01-17 |
Family
ID=13490524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63072480A Expired - Lifetime JPH083385B2 (en) | 1988-03-25 | 1988-03-25 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH083385B2 (en) |
Families Citing this family (2)
| 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 |
| WO2012169110A1 (en) * | 2011-06-09 | 2012-12-13 | 三菱電機株式会社 | Indoor unit for air-conditioner |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59178534U (en) * | 1983-05-16 | 1984-11-29 | ダイキン工業株式会社 | air conditioner |
| JPS62156719U (en) * | 1986-03-27 | 1987-10-05 |
-
1988
- 1988-03-25 JP JP63072480A patent/JPH083385B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01244238A (en) | 1989-09-28 |
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