JPH03156199A - Motor blower - Google Patents

Motor blower

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Publication number
JPH03156199A
JPH03156199A JP19779090A JP19779090A JPH03156199A JP H03156199 A JPH03156199 A JP H03156199A JP 19779090 A JP19779090 A JP 19779090A JP 19779090 A JP19779090 A JP 19779090A JP H03156199 A JPH03156199 A JP H03156199A
Authority
JP
Japan
Prior art keywords
layer
porous
electric blower
guide vane
porous structure
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.)
Granted
Application number
JP19779090A
Other languages
Japanese (ja)
Other versions
JP2725215B2 (en
Inventor
Kinzo Hibana
金造 日花
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2197790A priority Critical patent/JP2725215B2/en
Publication of JPH03156199A publication Critical patent/JPH03156199A/en
Application granted granted Critical
Publication of JP2725215B2 publication Critical patent/JP2725215B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To provide a guide blade capable of having a satisfactory sound absorbing property and coping with complicated shape and material by constituting the guide blade of a perforated structure consisting a perforated layer having a sound absorbing property and a ventilating or non-ventilating property fusion layer formed integrally with the perforated layer. CONSTITUTION:A guide blade 11 formed of a perforated structure is constituted integrally of a perforated layer 12 and fusion layer 13 respectively provided in the return flow path side and impeller side. An air flow sent in the direction of arrow by an impeller 6 rotatably driven by a motor 14 is converted and then sent through the guide blade 11 into a motor part to cool the motor 14. Then, noises are generated by the air flow and rotation of the impeller 6. These noises are absorbed by the perforated layer 12 of the perforated structure constituting the guide blade 11 and shielded by the fusion layer 13.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、吸音機能を有する案内羽根を備えた電気掃除
機等に用いられる電動送風機に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an electric blower used in a vacuum cleaner or the like, which is equipped with guide vanes having a sound-absorbing function.

[従来の技術] 第13図は例えば、実開昭55−104796号公報に
開示された従来の電気掃除機用電動送風機の一例を示す
分解斜視図、第14図(a) 、 (b)は第13図の
要部を示す平面図及びその背面図である。第14図に示
すように、電動送風機の案内羽根(1)の通路(2)の
一部には、背面側の消音空間(3)に連通する消音孔(
4)が設けられており、さらに消音空間(3)内にはフ
ェルトのような別個の吸音材(5)が設けられている。
[Prior Art] Fig. 13 is an exploded perspective view showing an example of a conventional electric blower for a vacuum cleaner disclosed in Japanese Utility Model Application Publication No. 55-104796, and Fig. 14 (a) and (b) are 14 is a plan view and a rear view showing the main parts of FIG. 13. FIG. As shown in Fig. 14, a part of the passage (2) of the guide vane (1) of the electric blower has a sound deadening hole (
4) is provided, and a separate sound absorbing material (5), such as felt, is provided within the sound deadening space (3).

このような案内羽根(1)の上部には、第13図に示す
ように、モータにより高速に回転駆動される翼車(6)
が設けられており、また、案内羽根(1)の下部にはブ
ラケット(7)、モータフレーム(8)が設けられてい
る。そして翼車(6)及び案内羽根(1)を覆った状態
でファンケース(9)がブラケット(7)に圧入固定さ
れている。
As shown in FIG. 13, above the guide vane (1), there is a blade wheel (6) that is driven to rotate at high speed by a motor.
A bracket (7) and a motor frame (8) are provided below the guide vane (1). A fan case (9) is press-fitted into the bracket (7) while covering the impeller (6) and guide vanes (1).

上記のように構成した従来の電動送風機によれば、電動
送風機の騒音は、消音空間(3)に連通した消音孔(4
)及び吸音材り5)により消音される。
According to the conventional electric blower configured as described above, the noise of the electric blower is produced by the noise reduction hole (4) communicating with the noise reduction space (3).
) and sound absorbing material 5).

第15図は例えば、特開昭61−98999号公報に開
示された電気掃除機用電動送風機の他の一例を示す縦断
面図、第16図は第15図の横断面図である。図に示す
ように、この電動送風機は案内羽根(1)の空気通路を
区画する案内g (10)が、吸音性の多孔性祠質で構
成されている。
FIG. 15 is a longitudinal cross-sectional view showing another example of an electric blower for a vacuum cleaner disclosed in, for example, Japanese Unexamined Patent Publication No. 61-98999, and FIG. 16 is a cross-sectional view of FIG. 15. As shown in the figure, in this electric blower, the guide g (10) that defines the air passage of the guide vane (1) is made of sound-absorbing porous abrasive material.

このような構成の電動送風機においては、回転駆動され
た翼車(6)を出た空気流は、矢印方向からモータ部に
進むが、この際電動送風機によって発生する騒音は案内
W (10)により吸収される。
In the electric blower having such a configuration, the airflow leaving the rotationally driven impeller (6) advances toward the motor section in the direction of the arrow, but at this time, the noise generated by the electric blower is removed by the guide W (10). Absorbed.

[発明が解決しようとする課題] 上記のように構成した従来の電動送風機には、以下に示
すような問題があった。まず、第13図、第14図に示
した電動送風機の場合は、通路(2)の一部から裏面側
の消音空間(3)に連通した消音孔(4)が設けられて
いるため、消音孔(4)そのものが風路損失になるとと
もに、静圧の回復に大きな役割をはたす戻り流路側を構
成する通風空間の一部を消音空間(3)として使用しな
ければならず、案内羽根(1)の空力特性上不利になる
。また、フェルトのような別個の吸音材(5)を所定の
消音空間(3)に設けなければならないので、組立に多
くの工数を必要とする。
[Problems to be Solved by the Invention] The conventional electric blower configured as described above has the following problems. First, in the case of the electric blower shown in Figs. 13 and 14, there is a sound deadening hole (4) that communicates from a part of the passage (2) to the sound deadening space (3) on the back side. The holes (4) themselves cause air passage loss, and a part of the ventilation space that constitutes the return flow passage side, which plays a major role in restoring static pressure, must be used as a silencing space (3), and the guide vanes ( 1) is disadvantageous in terms of aerodynamic characteristics. Furthermore, since a separate sound absorbing material (5) such as felt must be provided in a predetermined sound deadening space (3), many man-hours are required for assembly.

また、第15図、第16図に示した電動送風機の場合は
、案内羽根(1)の空気通路を区画する案内翼(10)
のみを多孔性材質としたため、案内g (10)を案内
羽根(1)に接合したりインサート成形等の加工手段を
用いなければならなかった。このため、案内羽根(1)
の空力特性を犠牲にしたり、案内翼(10)の製作にあ
たって部品の形状や作業性等の制約条件を受けたり、部
品加工面でのコストが上がる等の問題があった。
In addition, in the case of the electric blower shown in FIGS. 15 and 16, the guide vane (10) that divides the air passage of the guide vane (1)
Since only the guide g (10) was made of a porous material, it was necessary to join the guide g (10) to the guide vane (1) or use processing means such as insert molding. For this reason, the guide vane (1)
There have been problems such as sacrificing the aerodynamic properties of the guide vane (10), being subject to constraints such as the shape of the parts and workability, and increasing the cost of processing the parts.

本発明は、上記のような課題を解決するためになされた
もので、良好な吸音特性を有するとともに複雑な形状、
材質にも対応できる安価でかっ、低騒音の電動送風機を
得ることを目的とする。
The present invention was made to solve the above-mentioned problems, and has good sound absorption characteristics and a complex shape.
The purpose is to obtain an inexpensive, low-noise electric blower that is compatible with various materials.

[課題を解決するための手段] 本発明に係る電動送風機は、案内羽根を吸音性を有する
多孔質層と、この多孔質層と一体に形成した通気性又は
非通気性の融合層とからなる多孔質構造体で構成したも
のである。
[Means for Solving the Problems] An electric blower according to the present invention includes a guide vane made of a porous layer having sound absorbing properties and a breathable or non-breathable fusion layer formed integrally with the porous layer. It is composed of a porous structure.

また、上記多孔性構造体の背面に空気層を構成したもの
である。
Further, an air layer is formed on the back surface of the porous structure.

さらに、案内羽根の主フレームを合成樹脂で構成すると
共に多孔性構造体を吸音性と通気性を有する多孔質層で
構成し、その背面に空気層を形成したものである。
Further, the main frame of the guide vane is made of synthetic resin, and the porous structure is made of a porous layer having sound absorbing properties and air permeability, and an air layer is formed on the back surface of the porous structure.

[作 用] 翼車を出た空気流を案内羽根で転向させてモータ部に流
入させる際の翼車による回転や空気流によって発生する
騒音は、案内羽根の多孔質構造体又は多孔質構造体と空
気層とによって吸収遮断される。
[Function] The noise generated by the rotation of the impeller and the air flow when the airflow exiting the impeller is diverted by the guide vane and flows into the motor section is generated by the porous structure of the guide vane or the porous structure of the guide vane. It is absorbed and blocked by the air layer and the air layer.

[実施例] 第1図は本発明実施例の縦断面図である。なお、第13
図〜第16図の従来例と同−又は相当部分には同じ符号
を付し、説明を省略する。(11)は多孔質構造体で形
成された案内羽根で、(12)、(13)はそれぞれ案
内羽根(11)を一体となって構成する多孔質層及び融
合層である。本実施例では、多孔質層(12)は戻り流
路側に、融合層(13)は翼車側に設けられている。こ
の多孔質層(12)は、比重(又は空孔率)を厚さ方向
(又は層の面方向)に連続的に変化させた、全体では比
重が小さく、通常は通気性で吸音性を有する層である。
[Example] FIG. 1 is a longitudinal sectional view of an example of the present invention. In addition, the 13th
Components that are the same as or equivalent to those of the conventional example shown in FIGS. (11) is a guide vane formed of a porous structure, and (12) and (13) are a porous layer and a fused layer, respectively, which integrally constitute the guide vane (11). In this embodiment, the porous layer (12) is provided on the return flow path side, and the fusion layer (13) is provided on the impeller side. This porous layer (12) has a specific gravity (or porosity) that varies continuously in the thickness direction (or in the plane direction of the layer), has a low specific gravity as a whole, and usually has air permeability and sound absorption properties. It is a layer.

なお、多孔質層(12)を構成する粒状素材は、例えば
長径が0,2〜3.0關の球体又は楕円体を使用してい
るが、複数の異なる材質で構成してもよい。一方、融合
層(13)は非通気性(通気性の場合もある)の比重の
大きい中実層で、空気漏れ防止と遮音壁としての機能を
有する層である。
The granular material constituting the porous layer (12) is, for example, a sphere or an ellipsoid with a major axis of about 0.2 to 3.0, but it may be composed of a plurality of different materials. On the other hand, the fusion layer (13) is a non-breathable (sometimes breathable) solid layer with a high specific gravity, and has the function of preventing air leakage and functioning as a sound insulating wall.

第2図は第1図の案内羽根(11)の要部を拡大した断
面図である。なお、多孔質構造体自身の構造、製法、特
性等についての詳細は、本発明の出願人の出願に係る特
願平1−110996号明細書に記載した通りである。
FIG. 2 is an enlarged sectional view of the main part of the guide vane (11) shown in FIG. 1. The details of the structure, manufacturing method, characteristics, etc. of the porous structure itself are as described in Japanese Patent Application No. 1-110996 filed by the applicant of the present invention.

上記のように構成した本発明の詳細な説明すれば次の通
りである。モータ(14)により回転駆動された翼車(
6)により矢印方向に進んだ空気流は、転向したのち案
内羽根(11)を通ってモータ部に流入してモータ(1
4)を冷却する。この際、空気流及び翼車(6)の回転
により騒音が発生する。この騒音は、案内羽根(11)
を構成する多孔質構造体の多孔質層(12)で吸収され
、また融合層(13)で遮音される。
A detailed explanation of the present invention configured as above is as follows. A blade wheel (
6), the airflow that has advanced in the direction of the arrow is turned and flows into the motor section through the guide vane (11), and the airflow flows into the motor section (11).
4) Cool. At this time, noise is generated due to the air flow and the rotation of the impeller (6). This noise is caused by the guide vane (11)
The sound is absorbed by the porous layer (12) of the porous structure that constitutes the structure, and the sound is insulated by the fusion layer (13).

第3図は本発明の他の実施例を示す要部縦断面図である
。(lla)は多孔質構造体で形成された案内羽根で、
翼車側■と戻り流路側■の中間部に設けた仕切部(15
)で仕切られている。(12a)、(12b)はそれぞ
れ案内羽根(lla)の翼車側■と戻り流路側■の両面
に設けられた多孔質層で、吸音部としての機能を有して
いる。(Ha) 、 (13b)はそれぞれ仕切部(1
5)側に設けられた非通気性の融合層で、翼車側■と戻
り流路側■の圧力差による空気漏れを防止するとともに
、遮音層としての機能を有している。これらの多孔質層
(12a) 、 (12b)及び融合層(13a)、(
13b)は、一体となって案内羽根(lla)の多孔質
構造体を形成している。
FIG. 3 is a longitudinal sectional view of a main part showing another embodiment of the present invention. (lla) is a guide vane formed of a porous structure,
Partition part (15
). (12a) and (12b) are porous layers provided on both sides of the guide vane (lla) on the impeller side (2) and the return flow path side (2), respectively, and have a function as a sound absorbing portion. (Ha) and (13b) are respectively partition parts (1
The non-breathable fusion layer provided on the 5) side prevents air leakage due to the pressure difference between the impeller side (1) and the return flow path side (2), and also functions as a sound insulation layer. These porous layers (12a), (12b) and fused layers (13a), (
13b) together form the porous structure of the guide vane (lla).

第4図(a) 、(b) 、(c)は、それぞれ本発明
の別の実施例を示す説明図である。本実施例では、案内
羽根(l lb) 、(lie) 、 (11d)は、
いずれの場合も多孔質層(12c)〜(12h)を翼車
側■と戻り流路側■の両面に設けて吸音部とし、仕切部
側に融合層(13c)〜(13h)を設けて遮音部とし
たものである。
FIGS. 4(a), 4(b), and 4(c) are explanatory views showing other embodiments of the present invention, respectively. In this example, the guide vanes (l lb), (lie), (11d) are as follows:
In either case, porous layers (12c) to (12h) are provided on both sides of the impeller side (■) and return flow path side (■) to serve as a sound absorption section, and fusion layers (13c) to (13h) are provided on the partition side to provide sound insulation. It was established as a department.

さらに本実施例では、融合層(13)の各合せ面側の一
部に段差または突起部(リブ状突起部)を設け、仕切部
の内部には所定の空間を設けて空気層(17)を形成し
ている。なお、第4図(a)において、(13c)は翼
車側■に設けた通気性を有する融合層、(13d)は戻
り流路側■に設けた空気漏れを防止する非通気性の融合
層である。また、(16)は融合層(13d)側に設け
られた段差又は突起部である。
Furthermore, in this embodiment, a step or a protrusion (rib-like protrusion) is provided on a part of each mating surface side of the fusion layer (13), and a predetermined space is provided inside the partition to create an air layer (17). is formed. In Fig. 4(a), (13c) is a breathable fusion layer provided on the impeller side (■), and (13d) is a non-breathable fusion layer provided on the return flow path side (■) to prevent air leakage. It is. Further, (16) is a step or protrusion provided on the fusion layer (13d) side.

一方、第4図(b)は第4図(a)の場合とは逆に、翼
車側■の融合層(13e)を非通気性に、戻り流路側[
有]の融合層(13f)を通気性にしたものである。
On the other hand, in FIG. 4(b), contrary to the case of FIG. 4(a), the fusion layer (13e) on the impeller side is made non-porous, and the return flow path side [
The fused layer (13f) of the above material is made breathable.

また、第4図(c)の(18)は融合層(13g) 、
 (13h)の間に設けられた非通気性の遮音板で、た
とえば密度の高い鉄板や銅板のような金属板により構成
されている。また、(lea) 、 (16b)はそれ
ぞれ融合層(13g) 、 (13h)に設けられた段
差または突起部、(17a) 、 (17b)は仕切部
内部に設けられた空気層である。
In addition, (18) in Fig. 4(c) is the fusion layer (13g),
(13h) This is a non-breathable sound insulating plate provided between 13h and made of a metal plate such as a high-density iron plate or copper plate. Further, (lea) and (16b) are steps or protrusions provided in the fusion layers (13g) and (13h), respectively, and (17a) and (17b) are air layers provided inside the partition.

第5図は本発明のさらに別の実施例を示す縦断面図であ
る。本実施例では、第1図に示した案内羽根(11)に
さらにスキン層を加えたものである。
FIG. 5 is a longitudinal sectional view showing still another embodiment of the present invention. In this embodiment, a skin layer is further added to the guide vane (11) shown in FIG.

(19)は多孔質層(12)の戻り流路側■の表面に設
けられた、例えば10〇−以下の厚さのスキン層で、低
周波数域での吸音特性を有している。このスキン層(1
9)の比重は、通常は融合層(13)と多孔質層(12
)の中間にある。
(19) is a skin layer provided on the surface of the return flow path side (1) of the porous layer (12) and has a thickness of, for example, 100 mm or less, and has sound absorption characteristics in a low frequency range. This skin layer (1
The specific gravity of 9) is usually the same as that of the fused layer (13) and the porous layer (12).
) is in between.

なお、第6図は、第5図の要部を拡大した断面図である
Note that FIG. 6 is an enlarged cross-sectional view of the main part of FIG. 5.

第7図は本発明の別の実施例の分解斜視図であり、(2
0)は案内羽根の主要な羽根部や戻り流路のガイド羽根
部を、従来のように合成樹脂で一体成型した主フレーム
、(21)は上述の多孔質層のみで構成した多孔質構造
体(121)を主フレーム(20)との間に挾持固定す
ると共に、所定の空気層を確保し、かつ空気漏れを防止
するリブ(又は突起部)(16c)を備えた合成樹脂成
型品からなる仕切り板である。
FIG. 7 is an exploded perspective view of another embodiment of the present invention, (2
0) is a main frame in which the main blades of the guide vanes and the guide blades of the return flow path are integrally molded from synthetic resin as in the past, and (21) is a porous structure composed only of the above-mentioned porous layer. (121) is sandwiched and fixed between the main frame (20), and is made of a synthetic resin molded product equipped with ribs (or protrusions) (16c) that secure a predetermined air layer and prevent air leakage. It is a partition plate.

第8図は本実施例に係る多孔質構造体(121)の要部
拡大断面図で、多孔質構造体(121)の厚さ方向に密
度勾配をもたせ、表面に密面と粗面を構成したものであ
る。
FIG. 8 is an enlarged cross-sectional view of the main part of the porous structure (121) according to this example, in which the porous structure (121) has a density gradient in the thickness direction and has a dense surface and a rough surface on the surface. This is what I did.

第9図は第7図で説明した案内羽根構造体を電動送風機
に組込んだ状態を示す断面図で、多孔質構造体(121
)をその密面側が戻り流路■側に流れる空気流に面する
ように、主フレーム(20)と仕切り板(21)との間
に挟持固定して案内羽根(llr)を構成したものであ
る。これにより、戻り流路■内を流れる空気流に対する
損失が小さくなるので、空力性能を損うことはない。な
お、多孔質構造体(121)の背面に形成される空気層
(17)の厚さ(1)は、仕切り板(21)に一体に設
けられたリブ(又は突起部) (16c)によって確保
される。
FIG. 9 is a sectional view showing a state in which the guide vane structure explained in FIG. 7 is incorporated into an electric blower.
) is clamped and fixed between the main frame (20) and the partition plate (21) so that its dense side faces the airflow flowing toward the return flow path (■) side to form a guide vane (llr). be. As a result, the loss to the airflow flowing in the return flow path (2) is reduced, so that aerodynamic performance is not impaired. Note that the thickness (1) of the air layer (17) formed on the back surface of the porous structure (121) is ensured by ribs (or protrusions) (16c) provided integrally with the partition plate (21). be done.

第10図の実施例は仕切り板(21)に相当する部分(
21a)を主フレーム(20)と一体向に構成し、多孔
質構造体(+21)を翼車側■に取付けたもので、密面
側を翼車側■に向けて配置することより翼車側板側に発
生する騒音防止に有効である。
In the embodiment shown in FIG. 10, the part corresponding to the partition plate (21) (
21a) is constructed integrally with the main frame (20), and the porous structure (+21) is attached to the impeller side ■. Effective in preventing noise generated on the side plate side.

第11図は本発明に係る通気性を備えた多孔質構造体の
厚さを一定にして、背面空気層(17)の厚さ(【)を
変化させた場合の、周波数と垂直入射吸音率が高いこと
を示している。
Figure 11 shows the frequency and normal incidence sound absorption coefficient when the thickness of the porous structure with air permeability according to the present invention is kept constant and the thickness ([) of the back air layer (17) is varied. It shows that it is high.

また、第12図(a)は従来の電動送風機の騒音特性図
であり、第12図(b)は第9図の実施例において、多
孔質構造体及び背面空気層(17)の厚さを、ピーク周
波数f−nXZrにチューニングした場合の騒音特性図
で、図からも本発明の吸音特性が優れていることが理解
できる。
Moreover, FIG. 12(a) is a noise characteristic diagram of a conventional electric blower, and FIG. 12(b) is a diagram showing the thickness of the porous structure and the back air layer (17) in the embodiment of FIG. , which is a noise characteristic diagram when tuned to a peak frequency f-nXZr, and it can be understood from the figure that the sound absorption characteristics of the present invention are excellent.

本発明に係る電気掃除機等の電動送風機においては、翼
車は案内羽根の近傍で20.000〜40,000rp
mの高速回転をしており、空気の出口流速は100〜2
00数十trysにも達している。このため80〜百数
士ホーン(距At 1 m )程度の騒音値を示すとと
もに、翼車の羽根枚数CZr )や案内羽根枚数(Zg
 )と回転数成分(ωrad/s )に起因する周波数
に大きなピーク値(+10〜+30 dB)をもつとい
う特徴がある。本発明に係る送風機は構造上、騒音源と
なる翼車の極近傍に案内羽根として設置されるため、そ
の吸音効果も大である。
In the electric blower such as a vacuum cleaner according to the present invention, the impeller rotates at 20,000 to 40,000 rpm near the guide blades.
It rotates at a high speed of 100 m, and the air exit flow velocity is 100 to 2 m.
It has reached more than 00 tries. For this reason, it shows a noise value of about 80 to 100 horns (distance At 1 m), and the number of blades of the impeller (CZr) and the number of guide blades (Zg).
) and a large peak value (+10 to +30 dB) at the frequency caused by the rotational speed component (ωrad/s). Since the blower according to the present invention is structurally installed as a guide vane very close to the impeller, which is a noise source, its sound absorption effect is also great.

[発明の効果] 以上の説明から明らかなように、本発明によれば、電動
送風機の騒音のレベルや周波数特性等に応じて、案内羽
根を構成することができ、多孔質構造体の構成を選択し
たり、案内羽根内部に空気層を利用した吸音構造部を付
加することができる。
[Effects of the Invention] As is clear from the above description, according to the present invention, the guide vanes can be configured according to the noise level, frequency characteristics, etc. of the electric blower, and the configuration of the porous structure can be changed. You can also add a sound absorbing structure using an air layer inside the guide vane.

このため、電動送風機の持つ騒音特性や使用状態を考慮
した案内羽根が得られるので、取扱いが容易で安価な低
騒音の電動送風機を得ることができる。
Therefore, a guide vane can be obtained that takes into account the noise characteristics of the electric blower and the usage conditions, so that it is possible to obtain a low-noise electric blower that is easy to handle and inexpensive.

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

第1図は本発明実施例の縦断面図、第2図は第1図要部
の拡大断面図、第3図は本発明の他の実施例の要部縦断
面図、第4図(a) = (b) 、(c)は本発明の
別の実施例を示す説明図、第5図は本発明のさらに別の
実施例の縦断面図、第6図は第5図要部の拡大断面図、
第7図は本発明の他の実施例の要部を示す分解斜視図、
第8図は第7図の要部の拡大断面図、第9図は第7図の
案内羽根を電動送風機に組込んだ状態を示す断面図、第
1O図は本発明のさらに他の実施例の要部を示す断面図
、第11図は本発明に係る多孔質構造体の吸音特性の一
例を示す線図、第12図(a) 、 (b)は従来の電
動送風機と本発明の実施例に係る電動送風機の騒音特性
を示す線図、第13図は従来の電動送風機の一例を示す
分解斜視図、第14図(a) 、 (b)は第13図の
要部の平面図及びその裏面図、第15図は従来の電動送
風機の他の例を示す縦断面図、第16図は第15図の横
断面図である。 図において、(6)は翼車、(9)はファンケース、(
11)〜(l1g)は案内羽根、(12)〜(121)
は多孔質層、(13)〜(13a)は融合層、(1B)
 〜(lee)は段差または突起部、(17)〜(17
b)は空気層、(18)は遮音層、(19)はスキン層
、(20)は主フレーム、(21)は仕切り板である。 なお、図中同一符号は同一または相当部分を示すものと
する。
FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the main part of FIG. 1, FIG. 3 is a longitudinal sectional view of the main part of another embodiment of the invention, and ) = (b) and (c) are explanatory diagrams showing another embodiment of the present invention, FIG. 5 is a longitudinal sectional view of still another embodiment of the present invention, and FIG. 6 is an enlarged view of the main part of FIG. cross section,
FIG. 7 is an exploded perspective view showing the main parts of another embodiment of the present invention;
8 is an enlarged sectional view of the main part of FIG. 7, FIG. 9 is a sectional view showing the guide vane of FIG. 7 incorporated into an electric blower, and FIG. 1O is a further embodiment of the present invention. FIG. 11 is a diagram showing an example of sound absorption characteristics of the porous structure according to the present invention, and FIGS. 12(a) and (b) are diagrams showing a conventional electric blower and the implementation of the present invention. 13 is an exploded perspective view showing an example of a conventional electric blower; FIGS. 14(a) and 14(b) are a plan view of the main parts of FIG. 13; Its back view, FIG. 15 is a longitudinal cross-sectional view showing another example of the conventional electric blower, and FIG. 16 is a cross-sectional view of FIG. 15. In the figure, (6) is the impeller, (9) is the fan case, (
11) to (l1g) are guide vanes, (12) to (121)
is a porous layer, (13) to (13a) are fused layers, (1B)
~(lee) is a step or protrusion, (17) ~(17
b) is an air layer, (18) is a sound insulation layer, (19) is a skin layer, (20) is a main frame, and (21) is a partition plate. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (3)

【特許請求の範囲】[Claims] (1)回転する翼車を出た空気流を案内羽根により転向
させてモータ部に流入させ、該モータ部を冷却する電動
送風機において、 前記案内羽根を、吸音性を有する多孔質層と、この多孔
質層と一体に形成した通気性又は非通気性の融合層とか
らなる多孔質構造体で構成したことを特徴とする電動送
風機。
(1) In an electric blower that cools the motor by diverting the airflow from a rotating impeller using a guide vane to flow into a motor part, the guide vane is made of a porous layer having sound absorbing properties and a porous layer having sound absorption properties. An electric blower comprising a porous structure consisting of a porous layer and a breathable or non-breathable fusion layer formed integrally with the porous layer.
(2)前記多孔質構造体と対向して第2の多孔質構造体
を設け、これら両多孔質構造体の間に空気層を形成した
ことを特徴とする請求項(1)記載の電動送風機。
(2) The electric blower according to claim (1), characterized in that a second porous structure is provided opposite to the porous structure, and an air layer is formed between both of these porous structures. .
(3)回転する翼車を出た空気流を案内羽根により転向
させてモータ部に流入させ、該モータ部を冷却する電動
送風機において、 前記案内羽根を、合成樹脂成型品からなる主フレームと
、吸音性と通気性を有する多孔質層からなる多孔質構造
体と、該多孔質構造体の背面に形成された空気層とによ
って構成したことを特徴とする電動送風機。
(3) In an electric blower that cools the motor by diverting the airflow from a rotating impeller by a guide vane and causing it to flow into a motor part, the guide vane is connected to a main frame made of a synthetic resin molded product; An electric blower comprising a porous structure made of a porous layer having sound absorption and air permeability, and an air layer formed on the back surface of the porous structure.
JP2197790A 1989-08-08 1990-07-27 Electric blower Expired - Fee Related JP2725215B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2197790A JP2725215B2 (en) 1989-08-08 1990-07-27 Electric blower

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP1-203875 1989-08-08
JP20387589 1989-08-08
JP2197790A JP2725215B2 (en) 1989-08-08 1990-07-27 Electric blower

Publications (2)

Publication Number Publication Date
JPH03156199A true JPH03156199A (en) 1991-07-04
JP2725215B2 JP2725215B2 (en) 1998-03-11

Family

ID=26510568

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2197790A Expired - Fee Related JP2725215B2 (en) 1989-08-08 1990-07-27 Electric blower

Country Status (1)

Country Link
JP (1) JP2725215B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5336046A (en) * 1991-10-09 1994-08-09 Hatachi, Ltd. Noise reduced centrifugal blower

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51148766A (en) * 1975-06-17 1976-12-21 Mtp Kasei Kk Manufacture of synthetic resin foam sheet having molten covering
JPS5993998A (en) * 1982-11-19 1984-05-30 Matsushita Electric Ind Co Ltd Motor driven blower
JPS61192899A (en) * 1985-02-20 1986-08-27 Matsushita Refrig Co Centrifugal blower

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51148766A (en) * 1975-06-17 1976-12-21 Mtp Kasei Kk Manufacture of synthetic resin foam sheet having molten covering
JPS5993998A (en) * 1982-11-19 1984-05-30 Matsushita Electric Ind Co Ltd Motor driven blower
JPS61192899A (en) * 1985-02-20 1986-08-27 Matsushita Refrig Co Centrifugal blower

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5336046A (en) * 1991-10-09 1994-08-09 Hatachi, Ltd. Noise reduced centrifugal blower

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