JPH02275235A - Noise damping device of ventilating fan - Google Patents
Noise damping device of ventilating fanInfo
- Publication number
- JPH02275235A JPH02275235A JP1094830A JP9483089A JPH02275235A JP H02275235 A JPH02275235 A JP H02275235A JP 1094830 A JP1094830 A JP 1094830A JP 9483089 A JP9483089 A JP 9483089A JP H02275235 A JPH02275235 A JP H02275235A
- Authority
- JP
- Japan
- Prior art keywords
- noise
- sound
- absorbing material
- noise absorbing
- attached
- 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
- 238000013016 damping Methods 0.000 title 1
- 239000011358 absorbing material Substances 0.000 claims abstract description 22
- 238000009423 ventilation Methods 0.000 claims description 10
- 239000011800 void material Substances 0.000 claims description 2
- 239000002985 plastic film Substances 0.000 abstract description 2
- 229920006255 plastic film Polymers 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 239000012528 membrane Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は換気扇の運転により発生する騒音を防止する
防音装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a soundproofing device for preventing noise generated by the operation of a ventilation fan.
第５図及び第６図は１例えば特願昭６３−２０５９９２
号願書に添付した明細書及び図面に示された従来の換気
扇の防音装置を示す図で、第５図は縦断面図、第６図は
吸音材の斜視図である。Figures 5 and 6 are 1, for example, Japanese Patent Application No. 63-205992.
FIG. 5 is a longitudinal cross-sectional view, and FIG. 6 is a perspective view of the sound-absorbing material.
図中、（１）は天井（２）に取り付けられた外箱で、そ
の下面には室内（３）に開口する吸入口（４）が設けら
れ。In the figure, (1) is an outer box attached to the ceiling (2), and an inlet (4) that opens into the room (3) is provided on the bottom surface of the outer box.
側方には吐出口（５）が設けられており、ダクト（６）
を介して屋外に連通している （７）は外箱（１）内に
配置された隔板で、ベルマウス状の吸入口（８）が形成
されている。（９）は外箱（１）の上面に固定されたモ
ータ。A discharge port (5) is provided on the side, and a duct (6)
(7) is a partition plate placed inside the outer box (1), and a bell-mouth-shaped intake port (8) is formed therein. (9) is a motor fixed to the top surface of the outer box (1).
Ｑｌ）はモータ（９）に直結されたファン、αＤは軟質
ウレタンフオーム等で形成された吸音材で、外箱（１）
の内側に適合するブロック状に形成され、ファンＱｌが
収納されるうす巻き状の空所（１１ａ）が形成され。Ql) is a fan directly connected to the motor (9), αD is a sound absorbing material made of soft urethane foam, etc.
A thinly wound hollow space (11a) is formed in the shape of a block to fit inside the fan Ql, and the fan Ql is housed therein.
この空所（１１ａ）は吸入口（４）及び吐出口（５）に
それぞれ連通している。（１１１））はモータ（９）が
挿通される穴、ａｚは外箱＋１）の下面に装着されたグ
リル、αＪは空気流である。This cavity (11a) communicates with the suction port (4) and the discharge port (5), respectively. (111)) is a hole through which the motor (9) is inserted, az is a grill attached to the lower surface of the outer box +1), and αJ is an air flow.
従来の換気扇の防音装置は上記のように構成され、モー
タ（９）によシフアンαＱが回転すると、室内（３）の
空気はグリルα２を通じて吸入口（４）から外箱（１１
内に吸入され、吐出口（５）からダクｌ−（６） ｔ−
通じて屋外に排出される。A conventional soundproofing device for a ventilation fan is configured as described above. When the fan αQ is rotated by the motor (9), the air in the room (3) flows from the intake port (4) through the grill α2 to the outer box (11).
It is inhaled into the duct l- (6) t- from the discharge port (5).
is discharged outdoors through the
そして、換気運転時、モータ（９）及びファンａＱが発
する騒音（以下送風機の騒音という）は吸音材αυで吸
収されるが、この吸音材ＵＦｉブロック状でアシ、十分
な厚みを有しているのでその吸音特性は良い。During ventilation operation, the noise emitted by the motor (9) and fan aQ (hereinafter referred to as blower noise) is absorbed by the sound-absorbing material αυ, but this sound-absorbing material UFi is block-shaped and has sufficient thickness. So its sound absorption properties are good.
上記のような従来の換気扇の防音装置では、吸音材αυ
をブロック状にすることによυ対応しているが、後述す
るように送風機の騒音は周波数５００Ｈｚ〜１ ｋＨｚ
付近が高いため、１ｋＨｚを越える周波数に対して高
い吸音率を示す吸音材ａ１１では、送風機の騒音を十分
吸収できないという問題点がある。In the conventional soundproofing device for ventilation fans as described above, sound absorbing material αυ
However, as will be explained later, the noise of the blower has a frequency of 500 Hz to 1 kHz.
Since the vicinity is high, there is a problem in that the sound absorbing material a11, which exhibits a high sound absorption coefficient for frequencies exceeding 1 kHz, cannot sufficiently absorb the noise of the blower.
この発明は上記問題点を解決するためになされたもので
、送風機の騒音を十分低下できるようにした換気扇の防
音装置を提供することを目的とする。This invention was made to solve the above-mentioned problems, and it is an object of the present invention to provide a soundproofing device for a ventilation fan that can sufficiently reduce the noise of the blower.
この発明に係る換気扇の防音装置は、ファンを収納する
フロック状の吸音材の内面に吸音膜を装着したものであ
る。A soundproofing device for a ventilation fan according to the present invention has a sound-absorbing film attached to the inner surface of a flock-like sound-absorbing material that houses a fan.
この発明においては、吸音材の内面に吸音膜を装着した
ため、その吸音率特性は送風機の騒音の周波数特性と一
致する。In this invention, since the sound-absorbing film is attached to the inner surface of the sound-absorbing material, its sound absorption coefficient characteristics match the frequency characteristics of the noise of the blower.
第１図〜第４図はこの発明の一実施例を示す図で、第１
図は縦断面図、第２図は第１図の■−■線断面図、第３
図は送風機の騒音のスペクトル図。Figures 1 to 4 are diagrams showing one embodiment of the present invention.
The figure is a vertical cross-sectional view, Figure 2 is a cross-sectional view taken along the ■-■ line in Figure 1, and Figure 3 is a cross-sectional view taken along the
The figure is a spectrum diagram of blower noise.
第４図は吸音材の吸音率特性曲線図であり、従来装置と
同様の部分は同一符号で示す。FIG. 4 is a sound absorption coefficient characteristic curve diagram of the sound absorbing material, and parts similar to those of the conventional device are designated by the same reference numerals.
第１図及び第２図中、ｃ！υは吸音材ｎυの内面に装着
された３００μ程度の軟質プラスチック膜からなる吸音
膜である。In Figures 1 and 2, c! υ is a sound-absorbing film made of a soft plastic film of about 300 μm attached to the inner surface of the sound-absorbing material nυ.
上記のように構成された換気扇の防音装置においても、
送風機の騒音が、吸音材αυで吸収されることは従来装
置と同様である。Even in the soundproofing device for ventilation fans configured as above,
Similar to the conventional device, the noise from the blower is absorbed by the sound absorbing material αυ.
ここで、上記騒音は第３図に示すように、５００Ｈｚ〜
１ ｋＨｚ付近で高くなっている。一方、吸音材ｔ１１
１の吸音率は第４図の曲線Ａで示すように１ｋＨ２を越
えた周波数で高く、この実施例のように吸音材＋１１１
に吸音膜Ｑυを装着した場合の吸音率は。Here, as shown in Fig. 3, the above noise is 500Hz~
It becomes high around 1 kHz. On the other hand, sound absorbing material t11
As shown by curve A in Figure 4, the sound absorption coefficient of No. 1 is high at frequencies exceeding 1 kHz, and as in this example, the sound absorption coefficient of +111
What is the sound absorption coefficient when the sound absorption membrane Qυ is attached to?
曲線Ｂで示すように、５００Ｈｚ〜１ｋＨ２付近で高く
なっており、上記騒音の周波数特性とよく−致している
。したがって、上記騒音は良く吸収されることになる。As shown by curve B, it becomes high in the vicinity of 500 Hz to 1 kHz, which matches well with the frequency characteristics of the above-mentioned noise. Therefore, the noise is well absorbed.
以上説明したとおりこの発明では、ファンを収納するブ
ロック状の吸音材の内面に吸音膜を装着したので、それ
らによる吸音率特性は騒音の周波数特性と一致し、送風
機の騒音を低下することができる効果がある。As explained above, in this invention, a sound-absorbing film is attached to the inner surface of the block-shaped sound-absorbing material that houses the fan, so that the sound absorption coefficient characteristics match the frequency characteristics of the noise, making it possible to reduce the noise of the blower. effective.
第１図〜第４図はこの発明による換気扇の防音装置の一
実施例を示す図で、第１図は縦断面図。
第２図は第１図の■−■線断面図、第３図は送風機の騒
音のスペクトル図、第４図は吸音材の吸音率特性曲線図
、第５図は従来の換気扇の防音装置を示す縦断面図、第
６図は第５図の吸音材の斜視図である。
図中、（１）は外箱、（４）は吸入口、（５）は吐出口
、（９）はモータ、α〔はファン、 （１１１は吸音材
、 （１１ａ）は空所、ＣＤは吸音膜である。
なお２図中同一符号は同一部分を示す。1 to 4 are diagrams showing an embodiment of a soundproofing device for a ventilation fan according to the present invention, and FIG. 1 is a longitudinal sectional view. Figure 2 is a sectional view taken along the line ■-■ in Figure 1, Figure 3 is a spectrum diagram of noise from a blower, Figure 4 is a sound absorption coefficient characteristic curve diagram of a sound absorbing material, and Figure 5 is a diagram of a conventional ventilation fan soundproofing device. The vertical sectional view shown in FIG. 6 is a perspective view of the sound absorbing material of FIG. 5. In the figure, (1) is the outer box, (4) is the inlet, (5) is the discharge port, (9) is the motor, α is the fan, (111 is the sound absorbing material, (11a) is the void, and CD is the It is a sound-absorbing membrane. Note that the same reference numerals in the two figures indicate the same parts.
Claims (1)
出口に連通するうず巻き状の空所が形成されたブロック
状の吸音材を設け、上記空所内にモータにより駆動され
るファンを収納したものにおいて、上記吸音材の内面に
吸音膜を装着したことを特徴とする換気扇の防音装置。A block-shaped sound-absorbing material having a spiral-shaped cavity communicating with the intake port and the discharge port is provided in an outer box having an intake port and a discharge port, and a fan driven by a motor is housed in the void. A soundproofing device for a ventilation fan, characterized in that a sound-absorbing film is attached to the inner surface of the sound-absorbing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1094830A JPH02275235A (en) | 1989-04-14 | 1989-04-14 | Noise damping device of ventilating fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1094830A JPH02275235A (en) | 1989-04-14 | 1989-04-14 | Noise damping device of ventilating fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02275235A true JPH02275235A (en) | 1990-11-09 |
Family
ID=14120969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1094830A Pending JPH02275235A (en) | 1989-04-14 | 1989-04-14 | Noise damping device of ventilating fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02275235A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013508940A (en) * | 2011-01-06 | 2013-03-07 | 広東松下環境系統有限公司 | Illuminated ceiling fan |
| US9476608B2 (en) | 2011-04-27 | 2016-10-25 | Panasonic Ecology Systems Guangdong Co., Ltd. | Ceiling mounted ventilation fan with illumination |
| US9746195B2 (en) | 2011-09-29 | 2017-08-29 | Panasonic Ecology Systems Guangdong Co., Ltd. | Ceiling mounted ventilation fan |
| WO2019031299A1 (en) * | 2017-08-10 | 2019-02-14 | 富士工業株式会社 | Oily smoke trapping device |
-
1989
- 1989-04-14 JP JP1094830A patent/JPH02275235A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013508940A (en) * | 2011-01-06 | 2013-03-07 | 広東松下環境系統有限公司 | Illuminated ceiling fan |
| JP2013148348A (en) * | 2011-01-06 | 2013-08-01 | Panasonic Ecology Systems Guangdong Co Ltd | Ceiling embedded ventilation fan with illumination |
| CN103282586A (en) * | 2011-01-06 | 2013-09-04 | 广东松下环境系统有限公司 | Plafond embedded ventilation fan capable of illumination |
| US8814513B2 (en) | 2011-01-06 | 2014-08-26 | Panasonic Ecology Systems Guangdong Co., Ltd. | Ceiling mounted ventilation fan with illumination |
| US8956113B2 (en) | 2011-01-06 | 2015-02-17 | Panasonic Ecology Systems Guangdong Co., Ltd. | Ceiling mounted ventilation fan with illumination |
| CN103282586B (en) * | 2011-01-06 | 2016-01-20 | 广东松下环境系统有限公司 | Band illumination ceiling flush type ventilation fan |
| US9841181B2 (en) | 2011-01-06 | 2017-12-12 | Panasonic Ecology Systems Guangdong Co., Ltd. | Ceiling mounted ventilation fan with illumination |
| US9476608B2 (en) | 2011-04-27 | 2016-10-25 | Panasonic Ecology Systems Guangdong Co., Ltd. | Ceiling mounted ventilation fan with illumination |
| US10371409B2 (en) | 2011-04-27 | 2019-08-06 | Panasonic Ecology Systems Guangdong Co., Ltd. | Ceiling mounted ventilation fan with illumination |
| US9746195B2 (en) | 2011-09-29 | 2017-08-29 | Panasonic Ecology Systems Guangdong Co., Ltd. | Ceiling mounted ventilation fan |
| WO2019031299A1 (en) * | 2017-08-10 | 2019-02-14 | 富士工業株式会社 | Oily smoke trapping device |
| JP2019035515A (en) * | 2017-08-10 | 2019-03-07 | 富士工業株式会社 | Oily smoke collecting device |
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