JPH04187899A - Axial blower - Google Patents
Axial blowerInfo
- Publication number
- JPH04187899A JPH04187899A JP31584690A JP31584690A JPH04187899A JP H04187899 A JPH04187899 A JP H04187899A JP 31584690 A JP31584690 A JP 31584690A JP 31584690 A JP31584690 A JP 31584690A JP H04187899 A JPH04187899 A JP H04187899A
- Authority
- JP
- Japan
- Prior art keywords
- blowing
- orifice
- blade
- blower
- outer circumference
- 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.)
- Pending
Links
- 238000007664 blowing Methods 0.000 abstract description 8
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、主にセパレート形空気調和機の室外機などに
用いられる軸流送風機に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an axial blower mainly used in an outdoor unit of a separate type air conditioner.
（従来の技術）
近年、軸流送風機は、セパレート形空気調和機の室外機
などの送風機として、業務用から家庭用まで幅広く使用
されており、より低騒音化が望まれている。(Prior Art) In recent years, axial flow blowers have been widely used as blowers for outdoor units of separate air conditioners, from commercial to home use, and there is a desire for lower noise.
従来の軸流送風機について実開昭６２−１０５４３２号
公報などの提案を例として、第３図ないし第５図により
説明する。A conventional axial flow blower will be explained with reference to FIGS. 3 to 5, taking as an example the proposal of Japanese Utility Model Application Laid-Open No. 62-105432.
第３図および第４図は、従来の軸流送風機の構造を示す
正面図および要部拡大平面断面図である。FIG. 3 and FIG. 4 are a front view and an enlarged plane cross-sectional view of essential parts showing the structure of a conventional axial flow blower.
従来の軸流送風機は、本体１と、その内部に配置された
、ハブ２ａの周りに複数の羽根２ｂを設けた羽根車２と
、羽根車２の外周を囲むように、上記の本体１と一体に
形成された環状のオリフィス３と、羽根車２を回転させ
る電動機４とから構成されている。A conventional axial flow blower includes a main body 1, an impeller 2 arranged inside the main body 1 and having a plurality of blades 2b around a hub 2a, and a structure that surrounds the outer periphery of the impeller 2. It consists of an annular orifice 3 integrally formed and an electric motor 4 that rotates an impeller 2.
なお、上記のオリフィス３は、ベルマウス状の吸込口３
ａと、上記の吸込口３ａの最小内径から吹出し方向に向
かってラッパ状に広がる吹出口３ｂとで構成されている
。Note that the orifice 3 described above is a bell mouth-shaped suction port 3.
a, and an air outlet 3b that extends in a trumpet shape from the minimum inner diameter of the air inlet 3a toward the air outlet direction.
以上のように構成された軸流送風機の動作を説明する。The operation of the axial blower configured as above will be explained.
羽根車２が電動機４に駆動されて、所定の方向に回転す
ると、その送風作用で静圧と動圧が生じ、外気が本体ｌ
内に吸い込まれ、オリフィス３を通って機外に吐出され
る。When the impeller 2 is driven by the electric motor 4 and rotates in a predetermined direction, static pressure and dynamic pressure are generated by the blowing action, and the outside air is
The liquid is sucked into the machine and discharged through the orifice 3 to the outside of the machine.
（発明が解決しようとする課題）
しかしながら、上記の構成では、上記の羽根車２は、そ
の前端が本体ｌの前面と同一平面をなすように配置され
ているので、上記のオリフィス３の最小内径部は、ねじ
状の外周端を有する羽根２ｂの前端の内側に対向する。(Problem to be Solved by the Invention) However, in the above configuration, the impeller 2 is arranged such that its front end is flush with the front surface of the main body l, so the minimum inner diameter of the orifice 3 is The portion faces the inner side of the front end of the vane 2b having a threaded outer circumferential end.
従って、これより前方では、羽根２ｂと吹出口３ｂの隙
間は、漸次広くなる。Therefore, ahead of this, the gap between the blade 2b and the air outlet 3b gradually becomes wider.
細流送風機の通風抵抗が大きくなる条件で使用される場
合には、第５図に示す速度ベクトル図のように、軸方向
速度成分が減少し、半径方向速度成分が増加する。羽根
２ｂの吹出し側外周端部２Ｃとオリフィス３の吹出口３
ｂ壁面の隙間は、吹出し方向に漸増し、羽根２ｂの正圧
側と負圧側がむき出しとなるため、負圧側に逆流し、送
風性能が低下するとともに、乱流音による騒音が増加す
るという問題があった。When the trickle blower is used under conditions where the ventilation resistance becomes large, the axial velocity component decreases and the radial velocity component increases, as shown in the velocity vector diagram shown in FIG. Outer peripheral end 2C of the blade 2b on the outlet side and the outlet 3 of the orifice 3
The gap in the wall b gradually increases in the blowing direction, and the positive pressure side and negative pressure side of the blade 2b are exposed, so there is a problem that the air flows back to the negative pressure side, reducing the air blowing performance and increasing noise due to turbulence sound. there were.
本発明は上記の問題を解決するもので、オリフィスの吹
出口付近における羽根車２の吹出し側外周端部２Ｃで逆
流しない、低騒音の軸流送風機を提供するものである。The present invention solves the above problems and provides a low-noise axial flow blower that does not cause backflow at the outer peripheral end 2C of the impeller 2 near the outlet of the orifice.
（課題を解決するための手段）
上記の課題を解決するため、本発明は、羽根２ｂの吠出
し側外周端部２ｃを、オリフィス３の吹出口３ｂと一定
の隙間を持つように外側に延長するものである。(Means for Solving the Problems) In order to solve the above problems, the present invention extends the outer circumferential end 2c of the blade 2b on the blowout side to the outside so as to have a certain gap with the air outlet 3b of the orifice 3. It is something to do.
（作 用）
上記の構成により、羽根２ｂの吹出し側外周端部２ｃで
、正圧面と負圧面がむき出しにならないので、吹き出さ
れる気流の一部が、負圧面側に逆流しない。そのため、
送風性能は低下せず、騒音の増加も生じない。(Function) With the above configuration, the positive pressure surface and the negative pressure surface are not exposed at the outer circumferential end 2c on the blowing side of the blade 2b, so that a part of the airflow blown out does not flow back to the negative pressure surface side. Therefore,
Air blowing performance does not deteriorate and noise does not increase.
（実施例）
本発明の一実施例を第１図および第２図により説明する
。(Example) An example of the present invention will be described with reference to FIGS. 1 and 2.
第１図および第２図は、本発明による軸流送風機の構造
を示す正面図および要部拡大平面断面図で、本実施例が
、第３図および第４図に示した従来例と異なる点は、羽
根２の吹出し側外周端部２Ｃをオリフィス３の吹出口３
ｂの壁面と一定の隙間を保つように、ほぼ三角形状に延
長した点である。その他は従来例と変りがないので、同
じ構成部品には同一符号を付してその説明を省略する。1 and 2 are a front view and an enlarged plan sectional view of the main parts showing the structure of an axial blower according to the present invention, and show the differences between this embodiment and the conventional example shown in FIGS. 3 and 4. connects the outer circumferential end 2C of the blade 2 to the outlet 3 of the orifice 3.
It is a point extended in an almost triangular shape so as to maintain a certain gap with the wall surface of b. Since the rest is the same as the conventional example, the same components are given the same reference numerals and their explanations will be omitted.
以上のように構成された軸流送風機の動作を説明する。The operation of the axial blower configured as above will be explained.
軸流送風機の通風抵抗が大きくなる設置条件で外周側に
傾いた流れとなる場合でも、羽根２ｂの吹出し側外周端
部２Ｃとオリフィス３の吹出口３ｂとの隙間が広がらず
、羽根２ｂの正圧側と負圧側がむき出しにならないので
、負圧側に逆流せず、従って、送風性能の低下や、乱流
音による騒音の増加が抑えられる。Even if the flow is inclined toward the outer circumference due to the installation conditions where the ventilation resistance of the axial blower becomes large, the gap between the outer circumference end 2C on the outlet side of the blade 2b and the outlet 3b of the orifice 3 does not widen, and the Since the pressure side and the negative pressure side are not exposed, the flow does not flow back to the negative pressure side, thereby suppressing a decrease in air blowing performance and an increase in noise due to turbulent sound.
（発明の効果）
以上説明したように、本発明によれば、軸流送風機を組
み込んだ機器の設置条件に左右されることなく、常に所
定の送風性能を発揮し、乱流音による騒音が発生しない
軸流送風機が得られる。(Effects of the Invention) As explained above, according to the present invention, a predetermined air blowing performance is always exhibited regardless of the installation conditions of equipment incorporating an axial blower, and noise due to turbulence is generated. This results in an axial blower that does not.
第１図および第２図は本発明による軸流送風機の正面図
およびその要部拡大平面断面図、第３図および第４図は
従来の軸流送風機の正面図およびその要部拡大平面断面
図、第５図は従来の軸流送風機の雲間の流れを計測した
結果を示す速度ベクトル図である。
ｌ ・・・本体、 ２・・・羽根車、 ２ａ・・・ハブ
、 ２ｂ・・・羽根、 ２ｃ・・・吹出し側外周端部、
３ ・・・オリフィス、 ３ａ・・・吸込口、 ３ｂ
・・・吹出口、 ４ ・・・電動機。1 and 2 are a front view and an enlarged plan sectional view of the main parts of an axial flow blower according to the present invention, and FIGS. 3 and 4 are a front view and an enlarged plan sectional view of the main parts of a conventional axial flow blower. , FIG. 5 is a velocity vector diagram showing the results of measuring the flow between clouds of a conventional axial flow blower. l...Main body, 2...Impeller, 2a...Hub, 2b...Blade, 2c...Blowout side outer peripheral end,
3... Orifice, 3a... Suction port, 3b
...Air outlet, 4...Electric motor.
Claims (1)
車と、羽根車を囲むように設けた、吹出し方向に向かっ
て次第に広がる吹出口を有する環状のオリフィス羽根の
吹出し側外周端部を、上記オリフィスの吹出口の壁面と
一定の隙間を保つように、ほぼ三角形状に延長したこと
を特徴とする軸流送風機。At least an impeller in which a plurality of blades are installed around a hub, and an annular orifice blade provided surrounding the impeller and having a blowout port that gradually widens in the blowout direction, the outer circumferential end on the blowout side; An axial flow blower characterized in that the orifice has an approximately triangular extension so as to maintain a certain gap with the wall surface of the outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31584690A JPH04187899A (en) | 1990-11-22 | 1990-11-22 | Axial blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31584690A JPH04187899A (en) | 1990-11-22 | 1990-11-22 | Axial blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04187899A true JPH04187899A (en) | 1992-07-06 |
Family
ID=18070290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31584690A Pending JPH04187899A (en) | 1990-11-22 | 1990-11-22 | Axial blower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04187899A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5649807A (en) * | 1995-05-16 | 1997-07-22 | Sansung Electronics Co., Ltd. | Blade configuration for a ventilation fan |
| JP2010255560A (en) * | 2009-04-27 | 2010-11-11 | Sanyo Electric Co Ltd | Outdoor unit |
| WO2017060973A1 (en) * | 2015-10-06 | 2017-04-13 | 三菱電機株式会社 | Air blower, outdoor unit, and refrigeration cycle device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5234405B2 (en) * | 1974-08-13 | 1977-09-03 | ||
| JPS58170816A (en) * | 1982-03-15 | 1983-10-07 | ジ−トドイチエ・キユ−レルフアブリク・ユリウス・エフエル・ベア−・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング・ウント・コンパニ−・コマンデイト・ゲゼルシヤフト | Axial fan particularly for cooler of water-cooled internal combustion engine |
-
1990
- 1990-11-22 JP JP31584690A patent/JPH04187899A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5234405B2 (en) * | 1974-08-13 | 1977-09-03 | ||
| JPS58170816A (en) * | 1982-03-15 | 1983-10-07 | ジ−トドイチエ・キユ−レルフアブリク・ユリウス・エフエル・ベア−・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング・ウント・コンパニ−・コマンデイト・ゲゼルシヤフト | Axial fan particularly for cooler of water-cooled internal combustion engine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5649807A (en) * | 1995-05-16 | 1997-07-22 | Sansung Electronics Co., Ltd. | Blade configuration for a ventilation fan |
| JP2010255560A (en) * | 2009-04-27 | 2010-11-11 | Sanyo Electric Co Ltd | Outdoor unit |
| WO2017060973A1 (en) * | 2015-10-06 | 2017-04-13 | 三菱電機株式会社 | Air blower, outdoor unit, and refrigeration cycle device |
| JPWO2017060973A1 (en) * | 2015-10-06 | 2018-03-29 | 三菱電機株式会社 | Blower, outdoor unit and refrigeration cycle apparatus |
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