JP2015117605A - Centrifugal blower - Google Patents

Centrifugal blower Download PDF

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Publication number
JP2015117605A
JP2015117605A JP2013260575A JP2013260575A JP2015117605A JP 2015117605 A JP2015117605 A JP 2015117605A JP 2013260575 A JP2013260575 A JP 2013260575A JP 2013260575 A JP2013260575 A JP 2013260575A JP 2015117605 A JP2015117605 A JP 2015117605A
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impeller
height
width
protruding piece
centrifugal blower
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星野　聡
Satoshi Hoshino
聡 星野
遼 黒田
Ryo Kuroda
遼 黒田
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Priority to JP2013260575A priority Critical patent/JP2015117605A/en
Priority to CN201410781760.0A priority patent/CN104712583A/en
Publication of JP2015117605A publication Critical patent/JP2015117605A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F04D29/664—Sound attenuation by means of sound absorbing material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a centrifugal blower which has achieved further reduction in noise.SOLUTION: A centrifugal blower includes: an impeller 11 for blowing air sucked from a rotational axis O direction in a radial direction; and bell mouth parts 32 arranged at the impeller 11 facing with each other. It also includes a plurality of protrusion pieces 40 formed in a wave form continuously at an open end 32A of a suction port 33 of the bell mouth part 32. In these protrusion pieces 40, width W and height H satisfy the relationship of 1/3≤W/H≤3.

Description

本発明は、羽根車に対向して配置されるベルマウス部を備える遠心送風機に関する。   The present invention relates to a centrifugal blower including a bell mouth portion disposed to face an impeller.

一般に、回転軸方向から吸い込んだ空気を径方向に吹き出す羽根車と、この羽根車に対向して配置されるベルマウス部とを備える遠心送風機が知られている。この種の遠心送風機は、例えば、空気調和装置の室内ユニット等の室内に配置される機器に用いられることが多いため、運転時の空力音（騒音）を抑えることが望ましい。このため、従来、低騒音化を図るために、空気流が通過する通風部において、存在する構造体の縁部をセレーション構造とする技術が提案されている（例えば、特許文献１参照）。   In general, a centrifugal blower including an impeller that blows out air sucked in from a rotation axis direction in a radial direction and a bell mouth portion disposed to face the impeller is known. Since this type of centrifugal blower is often used in, for example, equipment disposed in a room such as an indoor unit of an air conditioner, it is desirable to suppress aerodynamic noise (noise) during operation. For this reason, conventionally, in order to reduce noise, a technique has been proposed in which an edge portion of an existing structure is a serrated structure in a ventilation portion through which an air flow passes (see, for example, Patent Document 1).

特開平１１−１５３３４２号公報JP-A-11-153342

しかし、従来の技術では、構造体の縁部を単にセレーション構造とするもので、このセレーション構造を形成する突出片の形状や大きさに関する開示はない。
本発明は、上述した従来の技術が有する課題を解消し、突出片の適正な形状や大きさを規定することで、騒音の一層の低減を図った遠心送風機を提供することを目的とする。 However, in the conventional technique, the edge of the structure is simply a serrated structure, and there is no disclosure regarding the shape and size of the protruding piece forming the serrated structure.
An object of the present invention is to provide a centrifugal blower that solves the problems of the conventional technology described above and further reduces noise by defining an appropriate shape and size of the protruding piece.

上記目的を達成するために、本発明は、回転軸方向から吸い込んだ空気を径方向に吹き出す羽根車と、前記羽根車に対向して配置されるベルマウス部とを備え、前記ベルマウス部の吸込開口の端部に、波形に連続して形成される複数の突出片を備え、これら突出片は、幅Ｗと高さＨとが１／３≦Ｗ／Ｈ≦３の関係を満たすことを特徴とする。   In order to achieve the above object, the present invention includes an impeller that blows out air sucked in from a rotation axis direction in a radial direction, and a bell mouth portion that is disposed so as to face the impeller. Provided at the end of the suction opening with a plurality of projecting pieces formed continuously in a wavy shape, and these projecting pieces satisfy the relationship of 1/3 ≦ W / H ≦ 3 in width W and height H. Features.

この構成において、前記突出片は、前記幅Ｗと前記高さＨとが略同一に形成されても良い。また、前記突出片は、略矩形状に形成され、各突出片間の間隔が当該突出片の幅と略同一に形成されても良い。また、前記突出片の前記高さＨを約１ｍｍに形成しても良い。   In this configuration, the protruding piece may be formed so that the width W and the height H are substantially the same. Further, the protruding piece may be formed in a substantially rectangular shape, and the interval between the protruding pieces may be formed substantially the same as the width of the protruding piece. Further, the height H of the protruding piece may be formed to about 1 mm.

本発明によれば、ベルマウス部の吸込開口の端部に、波形に連続して形成される複数の突出片を備え、これら突出片は、幅Ｗと高さＨとが１／３≦Ｗ／Ｈ≦３の関係を満たすため、ベルマウス部の吸込開口を通過する際に発生する騒音を一層低減できる。   According to the present invention, the end portion of the suction opening of the bell mouth portion is provided with a plurality of protruding pieces formed continuously in a waveform, and these protruding pieces have a width W and a height H of 1/3 ≦ W. Since the relationship of / H ≦ 3 is satisfied, noise generated when passing through the suction opening of the bell mouth portion can be further reduced.

本実施形態に係るシロッコファンの斜視図である。It is a perspective view of the sirocco fan concerning this embodiment. シロッコファンの断面図である。It is sectional drawing of a sirocco fan. ケーシングの吸込口を示す拡大図である。It is an enlarged view which shows the suction inlet of a casing. ベルマウス部の開口端に形成された突出片を示す拡大図である。It is an enlarged view which shows the protrusion piece formed in the opening end of a bellmouth part. 突出片の第２実施例を示す図である。It is a figure which shows 2nd Example of a protrusion piece. 突出片の第３実施例を示す図である。It is a figure which shows 3rd Example of a protrusion piece. 風量と騒音値との関係を示すグラフである。It is a graph which shows the relationship between an air volume and a noise value. 突出片の変形例を示す図である。It is a figure which shows the modification of a protrusion piece.

以下、図面を参照して本発明の実施形態について説明する。
図１は、本実施形態に係る送風機としてのシロッコファン１０の斜視図であり、図２は、シロッコファン１０の断面図である。
シロッコファン１０は、例えば、空気調和装置の室内ユニットや換気装置（いずれも不図示）に設けられ、これら室内ユニットもしくは換気装置における空気の送風のために用いられる。
シロッコファン１０は、図１に示すように、多数の羽根２１を備えた筒状の羽根車１１と、この羽根車１１を収容するケーシング１３と、羽根車１１の回転軸Ｏに連結されて当該羽根車１１を回転駆動させるファンモータ（不図示）とを備える。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a sirocco fan 10 as a blower according to the present embodiment, and FIG. 2 is a cross-sectional view of the sirocco fan 10.
The sirocco fan 10 is provided, for example, in an indoor unit or a ventilator (both not shown) of an air conditioner, and is used for blowing air in the indoor unit or the ventilator.
As shown in FIG. 1, the sirocco fan 10 is connected to a cylindrical impeller 11 having a large number of blades 21, a casing 13 that houses the impeller 11, and a rotation shaft O of the impeller 11. A fan motor (not shown) for rotating the impeller 11.

羽根車１１は、図２に示すように、円板状の主板２２と、この主板２２の両面の外周部に一端が固定される上記した羽根２１と、これら羽根２１の他端をそれぞれ連結するリング２３とを備えて構成されている。羽根車１１は、回転軸Ｏが延びる方向の両端に、羽根２１とリング２３とで形成された開口２４を有し、この開口２４を通じて吸入した空気を多数の羽根２１の隙間から径方向に吹き出す、いわゆる両吸い込み方式の羽根車となっている。   As shown in FIG. 2, the impeller 11 connects the disk-shaped main plate 22, the above-described blade 21 whose one end is fixed to the outer peripheral portions of both surfaces of the main plate 22, and the other end of the blade 21. A ring 23 is provided. The impeller 11 has openings 24 formed by the blades 21 and the rings 23 at both ends in the direction in which the rotation axis O extends, and blows out the air sucked through the openings 24 in the radial direction from the gaps of the numerous blades 21. This is a so-called double suction impeller.

ケーシング１３は、図１及び図２に示すように、羽根車１１との間に渦巻き状の通風路が形成されるような形状に形成され、このケーシング１３には、空気の吹出口３１と、ベルマウス部３２により囲われる空気の吸込口（吸込開口）３３とが形成されている。吸込口３３は、回転軸Ｏ方向におけるケーシング１３の両側方であって、上記した羽根車１１の開口２４と略重なる位置に設けられている。
ベルマウス部３２は、羽根車１１の開口２４に空気を案内するように、ケーシング１３の内側に湾曲しながら、開口端３２Ａが羽根車１１に近接する形状を呈している。
モータを駆動して羽根車１１を回転させると、羽根車１１の各羽根２１が内周側の空間から外周側の空間へと空気を昇圧して吹き出し、ケーシング１３の吸込口３３から羽根車１１の内周側の空間に空気が吸い込まれる。そして、羽根車１１の外周側に吹き出された空気は吹出口３１に集められて吹き出される構成となっている。 As shown in FIGS. 1 and 2, the casing 13 is formed in a shape such that a spiral air passage is formed between the casing 13 and the impeller 11, and the casing 13 includes an air outlet 31, An air suction port (suction opening) 33 surrounded by the bell mouth portion 32 is formed. The suction port 33 is provided on both sides of the casing 13 in the direction of the rotation axis O and at a position that substantially overlaps the opening 24 of the impeller 11 described above.
The bell mouth portion 32 is curved inward of the casing 13 so that air is guided to the opening 24 of the impeller 11, and has a shape in which the opening end 32 </ b> A is close to the impeller 11.
When the impeller 11 is rotated by driving the motor, each blade 21 of the impeller 11 pressurizes and blows out air from the space on the inner peripheral side to the space on the outer peripheral side. Air is sucked into the inner circumferential space. The air blown to the outer peripheral side of the impeller 11 is collected at the blowout port 31 and blown out.

ところで、シロッコファン１０は、空気調和装置の室内ユニット等、ユーザは居住する屋内（室内）に配置されることが多いため、シロッコファン１０の運転時における空力音（騒音）を抑えたいという要望がある。
一般に、空力音は、空気の流れのなかに生じる渦によって発生するものであり、この渦が大きくなると、空力音が大きくなることが知られている。
本構成では、図３及び図４に示すように、羽根車１１の開口２４に対向して配置されるベルマウス部３２の開口端３２Ａに、波形に連続して形成される複数の突出片４０（図４）を有するセレーション部３５が形成されている。
開口端３２Ａに複数の突出片４０を波形に連続して形成することにより、これら突出片４０によって、大きな渦の代わりに小さな渦が発生する。このため、この小さな渦が大きな渦の発生を防ぐことにより、吸込口３３を通過する際の空気抵抗が低減し、空力音（騒音）を低下させることができる。 By the way, since the sirocco fan 10 is often placed indoors (indoors) in which the user lives, such as an indoor unit of an air conditioner, there is a demand for suppressing aerodynamic noise (noise) during operation of the sirocco fan 10. is there.
In general, aerodynamic sound is generated by a vortex generated in the air flow, and it is known that the aerodynamic sound increases as the vortex increases.
In this configuration, as shown in FIGS. 3 and 4, a plurality of projecting pieces 40 formed continuously in a waveform at the opening end 32 </ b> A of the bell mouth portion 32 disposed to face the opening 24 of the impeller 11. A serration portion 35 having (FIG. 4) is formed.
By forming a plurality of protruding pieces 40 in a continuous waveform on the open end 32A, these protruding pieces 40 generate small vortices instead of large vortices. For this reason, by preventing this small vortex from generating a large vortex, the air resistance when passing through the suction port 33 is reduced, and aerodynamic noise (noise) can be reduced.

ベルマウス部３２の開口端３２Ａにセレーション部３５を設けるにあたり、発明者達が騒音の研究、解析を行ったところ、突出片の形状や大きさによって、騒音を低減できる効果が異なることが判明した。   When the inventors conducted research and analysis of noise in providing the serration portion 35 at the opening end 32A of the bell mouth portion 32, it was found that the effect of reducing noise differs depending on the shape and size of the protruding piece. .

［実施例１］
実施例１にかかるセレーション部３５は、図４に示すように、矩形状の突出片４０を波形に連続して形成している。この突出片４０は、突出片４０の幅Ｗと高さＨとが略同一となる略正方形状に形成されており、上記した幅Ｗ、高さＨ及び突出片４０，４０間のピッチＰはそれぞれ１ｍｍに形成されている。このため、本実施例１での幅Ｗと高さＨとの関係は、Ｗ／Ｈ＝１となる。
［実施例２］
実施例２にかかるセレーション部は、図５に示すように、矩形状の突出片４０を波形に連続して形成したものであり、実施例１と比べて突出片４０の高さＨが変更されている。この突出片４０は、上記した幅Ｗ及びピッチＰがそれぞれ１ｍｍに形成され、高さＨが３ｍｍに形成されている。このため、本実施例２での幅Ｗと高さＨとの関係は、Ｗ／Ｈ＝１／３となる。
［実施例３］
実施例３にかかるセレーション部は、図６に示すように、矩形状の突出片４０を波形に連続して形成したものであり、実施例１と比べて突出片４０の幅Ｗが変更されている。この突出片４０は、上記した高さＨ及びピッチＰがそれぞれ１ｍｍに形成され、幅Ｗが３ｍｍに形成されている。このため、本実施例３での幅Ｗと高さＨとの関係は、Ｗ／Ｈ＝３となる。
［比較例］
また、比較例として、ベルマウス部３２の開口端３２Ａにセレーション部を設けていないものを挙げている。
なお、これら実施例１〜３及び比較例において、突出片の形状、大きさ以外のシロッコファン１０の構成はすべて同一であり、図２に示すように、ベルマウス部３２の開口端３２Ａと羽根車１１との距離Ｘは、突出片の有無、及び、突出片の形状、大きさに関わらず同一のものとする。 [Example 1]
As shown in FIG. 4, the serration portion 35 according to the first embodiment has a rectangular protruding piece 40 formed continuously in a waveform. The protruding piece 40 is formed in a substantially square shape in which the width W and the height H of the protruding piece 40 are substantially the same, and the above-described width W, height H and the pitch P between the protruding pieces 40 and 40 are as follows. Each is formed to 1 mm. For this reason, the relationship between the width W and the height H in the first embodiment is W / H = 1.
[Example 2]
As shown in FIG. 5, the serration portion according to the second embodiment is formed by continuously forming a rectangular protruding piece 40 in a waveform, and the height H of the protruding piece 40 is changed compared to the first embodiment. ing. The protruding piece 40 is formed such that the above-described width W and pitch P are 1 mm, and the height H is 3 mm. For this reason, the relationship between the width W and the height H in the second embodiment is W / H = 1/3.
[Example 3]
As shown in FIG. 6, the serration portion according to the third embodiment is formed by continuously forming a rectangular protruding piece 40 in a waveform, and the width W of the protruding piece 40 is changed compared to the first embodiment. Yes. The protruding piece 40 is formed such that the above-described height H and pitch P are 1 mm, and the width W is 3 mm. For this reason, the relationship between the width W and the height H in the third embodiment is W / H = 3.
[Comparative example]
Further, as a comparative example, a bell mouth portion 32 having no serration portion at the opening end 32A is cited.
In Examples 1 to 3 and the comparative example, the configuration of the sirocco fan 10 is the same except for the shape and size of the projecting piece, and as shown in FIG. The distance X to the vehicle 11 is the same regardless of the presence or absence of the protruding piece and the shape and size of the protruding piece.

図７は、風量と騒音値との関係を示すグラフである。この図７において、騒音値はグラフの右方ほど大きく左方ほど小さくなっている。
この図７に示すように、ベルマウス部３２の開口端３２Ａにセレーション部を設けた実施例１〜３は、同一風量の条件下において、比較例に比べて、いずれも騒音値が低減していることがわかる。すなわち、突出片の幅Ｗと高さＨとが１／３≦Ｗ／Ｈ≦３の関係を満たす範囲において、騒音値が低減するという効果を奏する。
実施例１では、図７に示すように、風量が１２ｍ3／ｍｉｎ（弱風領域）から２０ｍ3／ｍｉｎ（強風領域）の通常の使用範囲全般において、騒音値の低減が見られ、特に、風量が大きくなるに連れて、比較例との騒音値の差分が大きくなる傾向にある。従って、突出片の幅Ｗと高さＨとがＷ／Ｈ＝１を満たすのが好ましく、更には、突出片の高さＨを約１ｍｍに設定することが好ましい。 FIG. 7 is a graph showing the relationship between the air volume and the noise value. In FIG. 7, the noise value is larger toward the right side of the graph and smaller toward the left side.
As shown in FIG. 7, in Examples 1 to 3 in which the serration portion is provided at the opening end 32 </ b> A of the bell mouth portion 32, the noise value is reduced as compared with the comparative example under the condition of the same air volume. I understand that. That is, there is an effect that the noise value is reduced in a range where the width W and the height H of the protruding piece satisfy the relationship of 1/3 ≦ W / H ≦ 3.
In Example 1, as shown in FIG. 7, the noise value is reduced in the general use range of the air volume from 12 m 3 / min (weak wind region) to 20 m 3 / min (strong wind region). As the air volume increases, the difference in noise value from the comparative example tends to increase. Therefore, it is preferable that the width W and the height H of the protruding piece satisfy W / H = 1, and it is more preferable that the height H of the protruding piece is set to about 1 mm.

また、実施例３は、風量が１２ｍ3／ｍｉｎ程度の弱風領域においては、実施例１との騒音値の差分が小さいが、風量が２０ｍ3／ｍｉｎを超えた範囲においては、実施例１との差分が大きくなり比較例との差分が小さくなる傾向にある。これは、ピッチＰを変えずに突出片の高さＨに対する幅Ｗを大きくすると、ピッチＰに比べて突出片が大きくなるため、比較例に近い形状となり、２０ｍ3／ｍｉｎを超えた範囲で比較例に接近するものと考えられる。このため、突出片の幅Ｗと高さＨとの関係を１／３＞Ｗ／Ｈとすることは比較例に対する効果が小さくなるため、シロッコファン１０に利用するには好ましくない。 In Example 3, in a weak wind region of about airflow is 12m 3 / min, in the range is the difference between the noise value is small, the air volume exceeds 20 m 3 / min of Example 1, Example 1 And the difference from the comparative example tends to be small. This is because when the width W with respect to the height H of the protruding piece is increased without changing the pitch P, the protruding piece becomes larger than the pitch P, so that the shape is close to that of the comparative example, and in a range exceeding 20 m 3 / min. It is considered to approach the comparative example. For this reason, setting the relationship between the width W and the height H of the protruding piece to 1/3> W / H is not preferable for use in the sirocco fan 10 because the effect on the comparative example is reduced.

実施例２では、比較例との騒音値の差分は、風量の変化に関わらず略一定値となっており、通常の使用範囲の全般において、騒音値を低減できることが判明した。しかし、突出片の幅Ｗに対する高さＨを大きくすると、突出片の基端部と羽根車１１との隙間が大きくなるため、吸込口３３から吸い込まれた空気の一部がこの隙間を通じて、羽根車１１の外側の空間に流入する。これにより、送風量が低下するため、シロッコファン１０の送風効率の低下が懸念される。このため、突出片の幅Ｗに対する高さＨをＷ／Ｈ＞３とすることは、送風効率の点から好ましくない。
従って、ベルマウス部３２の吸込口３３の開口端３２Ａに、波形に連続して形成される複数の突出片は、幅Ｗと高さＨとが１／３≦Ｗ／Ｈ≦３の関係を満たすことが好ましく、更には、Ｗ／Ｈ＝１を満たすのが好ましく、更には、突出片の高さＨを約１ｍｍに設定することが好ましい。 In Example 2, the difference in the noise value from the comparative example is a substantially constant value regardless of the change in the air volume, and it has been found that the noise value can be reduced over the entire normal use range. However, if the height H with respect to the width W of the projecting piece is increased, the gap between the base end portion of the projecting piece and the impeller 11 becomes larger. It flows into the space outside the car 11. Thereby, since the air flow rate is reduced, there is a concern that the air blowing efficiency of the sirocco fan 10 is reduced. For this reason, it is not preferable from the point of ventilation efficiency to make height H with respect to the width W of a protrusion piece into W / H> 3.
Therefore, the plurality of projecting pieces formed continuously in the waveform at the opening end 32A of the suction port 33 of the bell mouth portion 32 have a relationship that the width W and the height H are 1/3 ≦ W / H ≦ 3. It is preferable to satisfy, and it is preferable to satisfy W / H = 1. Furthermore, it is preferable to set the height H of the protruding piece to about 1 mm.

以上説明したように、本発明を適用した実施形態によれば、回転軸Ｏ方向から吸い込んだ空気を径方向に吹き出す羽根車１１と、羽根車１１に対向して配置されるベルマウス部３２とを備え、ベルマウス部３２の吸込口３３の開口端３２Ａに、波形に連続して形成される複数の突出片４０を備え、これら突出片４０は、幅Ｗと高さＨとが１／３≦Ｗ／Ｈ≦３の関係を満たすため、単に突出片を設けたものに比べて、騒音値を低減することができる。   As described above, according to the embodiment to which the present invention is applied, the impeller 11 that blows out the air sucked in from the rotation axis O direction in the radial direction, and the bell mouth portion 32 that is disposed to face the impeller 11, And a plurality of protruding pieces 40 formed continuously in a wavy shape at the opening end 32A of the suction port 33 of the bell mouth portion 32. The protruding pieces 40 have a width W and a height H of 1/3. Since the relationship of ≦ W / H ≦ 3 is satisfied, the noise value can be reduced as compared with the case where the protruding piece is simply provided.

また、本実施形態によれば、突出片４０は、幅Ｗと高さＨとが略同一に形成されているため、より一層、騒音値の低減を実現できる。   Further, according to the present embodiment, since the protruding piece 40 has the width W and the height H substantially the same, the noise value can be further reduced.

また、突出片４０は、略矩形状に形成され、各突出片４０，４０間のピッチＰが当該突出片４０の幅Ｗと略同一に形成されているため、騒音値の低減を図るともに、ベルマウス部３２の吸込口３３の開口端３２Ａにセレーション部３５を簡単に形成できる。   Further, since the protruding piece 40 is formed in a substantially rectangular shape, and the pitch P between the protruding pieces 40 and 40 is formed substantially the same as the width W of the protruding piece 40, the noise value is reduced. The serration portion 35 can be easily formed at the opening end 32 </ b> A of the suction port 33 of the bell mouth portion 32.

また、突出片の高さＨを約１ｍｍに形成したため、送風量の低下を防止しつつも、騒音値の低減を図ることができる。   Moreover, since the height H of the projecting piece is formed to be about 1 mm, it is possible to reduce the noise value while preventing a decrease in the blowing amount.

なお、上記実施の形態は本発明を適用した一態様を示すものであって、本発明は上記実施の形態に限定されるものではない。
例えば、上記実施形態の実施例１〜３では、突出片４０を矩形状（正方形または長方形）に形成したが、図８の変形例に示すように、ケーシング１３を射出成型等で形成する場合には、突出片４１に抜き勾配を形成し、上辺の幅Ｗ´を下辺の幅Ｗよりも狭めた形状としても良い。また、突出片の幅Ｗと高さＨとが１／３≦Ｗ／Ｈ≦３の関係を満たしさえすれば、セレーション部として、例えば、三角形状の突出片を波形に連続して形成することもできる。
また、本実施形態では、羽根車１１及びケーシング１３は、両吸い込み式として構成しているが、片吸い込み式としてもよい。 In addition, the said embodiment shows the one aspect | mode which applied this invention, Comprising: This invention is not limited to the said embodiment.
For example, in Examples 1 to 3 of the above embodiment, the protruding piece 40 is formed in a rectangular shape (square or rectangular). However, as shown in the modification of FIG. 8, when the casing 13 is formed by injection molding or the like. May have a shape in which a draft angle is formed in the protruding piece 41 and the width W ′ of the upper side is narrower than the width W of the lower side. Further, as long as the width W and the height H of the protruding piece satisfy the relationship of 1/3 ≦ W / H ≦ 3, for example, a triangular protruding piece is continuously formed in a waveform as the serration portion. You can also.
Further, in the present embodiment, the impeller 11 and the casing 13 are configured as a double suction type, but may be a single suction type.

１０ シロッコファン（遠心送風機）
１１ 羽根車
１３ ケーシング
２１ 羽根
３１ 吹出口
３２ ベルマウス部
３２Ａ 開口端（端部）
３３ 吸込口（吸込開口）
３５ セレーション部
４０，４１，４５，５０ 突出片
４５Ａ，５０Ａ 頂部
Ｈ 高さ
Ｏ 回転軸
Ｐ ピッチ
Ｗ 幅 10 Sirocco fan (centrifugal blower)
DESCRIPTION OF SYMBOLS 11 Impeller 13 Casing 21 Blade | blade 31 Outlet 32 Bell mouth part 32A Open end (end part)
33 Suction port (suction opening)
35 Serration part 40, 41, 45, 50 Protruding piece 45A, 50A Top part H Height O Rotating shaft P Pitch W Width

Claims (4)

回転軸方向から吸い込んだ空気を径方向に吹き出す羽根車と、前記羽根車に対向して配置されるベルマウス部とを備え、前記ベルマウス部の吸込開口の端部に、波形に連続して形成される複数の突出片を備え、これら突出片は、幅Ｗと高さＨとが１／３≦Ｗ／Ｈ≦３の関係を満たすことを特徴とする遠心送風機。   An impeller that blows out the air sucked in from the rotation axis direction in a radial direction, and a bell mouth portion that is arranged to face the impeller, and is continuous with the waveform at the end of the suction opening of the bell mouth portion. A centrifugal blower comprising a plurality of protruding pieces to be formed, wherein the protruding pieces satisfy a relationship of 1/3 ≦ W / H ≦ 3 in width W and height H. 前記突出片は、前記幅Ｗと前記高さＨとが略同一に形成されていることを特徴とする請求項１に記載の遠心送風機。   The centrifugal blower according to claim 1, wherein the protruding piece is formed so that the width W and the height H are substantially the same. 前記突出片は、略矩形状に形成され、各突出片間の間隔が当該突出片の幅と略同一に形成されていることを特徴とする請求項１または２に記載の遠心送風機。   The centrifugal blower according to claim 1 or 2, wherein the protruding pieces are formed in a substantially rectangular shape, and an interval between the protruding pieces is substantially the same as a width of the protruding pieces. 前記突出片の前記高さＨを約１ｍｍに形成したことを特徴とする請求項１乃至３のいずれかに記載の遠心送風機。   The centrifugal blower according to any one of claims 1 to 3, wherein the height H of the protruding piece is formed to be about 1 mm.
JP2013260575A 2013-12-17 2013-12-17 Centrifugal blower Pending JP2015117605A (en)

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Publication number Priority date Publication date Assignee Title
WO2018008126A1 (en) * 2016-07-07 2018-01-11 三菱電機株式会社 Blower device, outdoor unit for air-conditioner, and refrigeration cycle device
JPWO2018008126A1 (en) * 2016-07-07 2018-10-11 三菱電機株式会社 Blower, outdoor unit of air conditioner, and refrigeration cycle apparatus
CN113280004A (en) * 2020-02-20 2021-08-20 宏碁股份有限公司 Heat radiation fan
CN113280004B (en) * 2020-02-20 2023-08-22 宏碁股份有限公司 Heat radiation fan
CN115342078A (en) * 2022-10-20 2022-11-15 杭州顿力电器有限公司 High-efficiency centrifugal fan with module diffusion structure
CN115342078B (en) * 2022-10-20 2023-03-24 杭州顿力电器有限公司 High-efficiency centrifugal fan with module diffusion structure

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