EP1692962A1 - Haartrockner mit verbessertem akustischem Komfort - Google Patents

Haartrockner mit verbessertem akustischem Komfort Download PDF

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Publication number
EP1692962A1
EP1692962A1 EP05447037A EP05447037A EP1692962A1 EP 1692962 A1 EP1692962 A1 EP 1692962A1 EP 05447037 A EP05447037 A EP 05447037A EP 05447037 A EP05447037 A EP 05447037A EP 1692962 A1 EP1692962 A1 EP 1692962A1
Authority
EP
European Patent Office
Prior art keywords
hair dryer
blades
dryer according
dynamic equilibrium
maintained
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.)
Withdrawn
Application number
EP05447037A
Other languages
English (en)
French (fr)
Inventor
Olivier Smal
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.)
Faco SA
Original Assignee
Faco SA
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 Faco SA filed Critical Faco SA
Priority to EP05447037A priority Critical patent/EP1692962A1/de
Publication of EP1692962A1 publication Critical patent/EP1692962A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00—Hair drying devices; Accessories therefor
    • A45D20/04—Hot-air producers
    • A45D20/08—Hot-air producers heated electrically
    • A45D20/10—Hand-held drying devices, e.g. air douches
    • A45D20/12—Details thereof or accessories therefor, e.g. nozzles, stands
    • 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
    • F04D29/662—Balancing of rotors
    • 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
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes

Definitions

  • the present invention relates to hair dryers and in particular hair dryers with improved sound performances in the field of the resonant frequency of the ear.
  • the perception of a noise and in particular of a noise nuisance due to a hair dryer is relatively subjective but there are however frequencies considered as being particularly unpleasant by many users.
  • GB-A-2 156 007 discloses an axial turbine with a particular configuration of its blades showing an attempt to improve the flow of air over the heating element by reducing turbulence.
  • the geometry of this axial turbine is relatively complex and therefore expensive.
  • US-A-60/11903 also discloses a silent hair dryer with multiple axial turbines; its construction is very complex.
  • a radial turbine To meet the geometric constraints of some current hair dryers, the inventor has used a radial turbine. These radial turbines have been the subject of many studies to try to make them quieter especially for industrial uses on steam turbines as well as as cooling turbines for pumps and motors.
  • the essential characteristic of such a radial turbine lies in the fact that the shape of the blades and their spacing relative to each other is variable while maintaining the center of gravity in the middle of the turbine to avoid unbalance. It is said that the turbine is in dynamic equilibrium.
  • British patent GB-A-2,046,360 also discloses a radial turbine with a variable spacing between the blades.
  • the present invention aims to provide a hair dryer with a radial turbine in dynamic equilibrium, on which the blades have a variable angular spacing, to reduce the amplitude of the frequencies between 3000 and 5000Hz and in particular around 4000Hz.
  • the present invention discloses an improved acoustic comfort hair dryer having a heating resistor, a motor and a radial turbine provided with a plurality of blades in dynamic equilibrium, rotating about a central axis, said vanes extending in a plane perpendicular to said axis and forming an angular spacing therebetween, characterized in that said vanes are arranged irregularly and in that at least two adjacent vanes form an angular spacing different from the other adjacent vanes.
  • Figure 1 shows the various turbine models A, B and C that have been tested by the inventor.
  • Figure 2 shows the redistribution of frequencies around 4KHz to low frequencies. This effect is obtained with model A.
  • Figure 3 shows the increase in low frequencies obtained by model B.
  • Figure 4 shows the increase in high frequencies obtained with the C model.
  • Figure 5 shows the exacerbated sensitivity of the human ear to sounds around 4KHz.
  • Figure 6 shows a detailed drawing of 3 versions of the radial turbine according to the model A, B and D (only one angle different from the others) or the dynamic equilibrium is obtained by the arrangement of the blades.
  • model A To try to reduce the amplitude of the frequency range between 3000 and 5000 Hz, the inventor used two types of radial turbines (Model A and Model B) and a type of axial turbine (Model C).
  • Model A and model B lies in the fact that, in model A, only the distribution of the angles between the different vanes was changed while maintaining the center of gravity in the middle of the radial turbine (dynamic equilibrium) while, on the B model, the thickness of the blades was also modified while of course keeping the center of gravity on the axis of said radial turbine.
  • Model C produces a larger air flow but nevertheless produces a higher amplitude in the high frequencies.
  • the following table shows the number of revolutions per minute and the flow rate of the different models A, B and C compared to an original model.
  • Figures 3, 4 and 5 show the performances of the different models with regard to the number of decibels and the frequencies.
  • These different figures concerning the models A, B and C show that the model A reduces the frequencies around 4KHz, which was the desired effect because this frequency corresponds to the resonance frequency of the eardrum and is perceived from more importantly for the same sound level (dB). This reduction therefore leads to an improvement in acoustic comfort despite the increase in amplitude of the low frequencies resulting in a higher noise level. important. It is also noted that performance on the bit rate is also increased (throughput / RPM).
  • Model B uses a radial turbine with different angular spacings but where the blade thickness has also been modified while maintaining dynamic equilibrium. In this case, we see in Figure 3 that the high frequencies retain the same sound level while the low frequencies are amplified; this model does not meet the expectations of the invention.
  • Model C uses an axial turbine which is more efficient in terms of flow; it slightly increases the air pressure at the outlet of the hair dryer but it also increases the amplitude of the high frequencies, which is also contrary to the aim pursued by the invention.
  • the following table summarizes the performance of the various turbine models.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning And Drying Hair (AREA)
EP05447037A 2005-02-18 2005-02-18 Haartrockner mit verbessertem akustischem Komfort Withdrawn EP1692962A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05447037A EP1692962A1 (de) 2005-02-18 2005-02-18 Haartrockner mit verbessertem akustischem Komfort

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05447037A EP1692962A1 (de) 2005-02-18 2005-02-18 Haartrockner mit verbessertem akustischem Komfort

Publications (1)

Publication Number Publication Date
EP1692962A1 true EP1692962A1 (de) 2006-08-23

Family

ID=34943260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05447037A Withdrawn EP1692962A1 (de) 2005-02-18 2005-02-18 Haartrockner mit verbessertem akustischem Komfort

Country Status (1)

Country Link
EP (1) EP1692962A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2967490A1 (fr) * 2010-11-15 2012-05-18 Seb Sa Procede de mesure du bruit d'un seche-cheveux
US20180252237A1 (en) * 2017-03-01 2018-09-06 Cooler Master Co., Ltd. Impeller
CN110985412A (zh) * 2019-11-14 2020-04-10 中国航天空气动力技术研究院 一种基于非对称叶轮的低噪声多翼离心风机
EP3246577B1 (de) * 2015-01-16 2021-03-10 Mitsubishi Electric Corporation Gebläse und klimaanlage damit
CN113048086A (zh) * 2021-03-18 2021-06-29 江苏大学 一种基于径向基神经网络模型的低噪声不等距离心风扇优化设计方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2046360A (en) 1979-03-31 1980-11-12 Aes Plastics Ltd Fluid impeller
US4253800A (en) 1978-08-12 1981-03-03 Hitachi, Ltd. Wheel or rotor with a plurality of blades
GB2156007A (en) 1984-02-15 1985-10-02 Fernhurst Limited Noise reducing blade/stator assembly
US6011903A (en) 1997-04-25 2000-01-04 Soundesign, L.L.C. Reduced-noise ducted flow hair dryer with multiple impellers and ambient air inlets
US6491499B1 (en) 2000-09-27 2002-12-10 Torrington Research Company Axial flow fan
JP2003093138A (ja) * 2001-09-25 2003-04-02 Matsushita Electric Works Ltd ヘアードライヤー

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4253800A (en) 1978-08-12 1981-03-03 Hitachi, Ltd. Wheel or rotor with a plurality of blades
GB2046360A (en) 1979-03-31 1980-11-12 Aes Plastics Ltd Fluid impeller
GB2156007A (en) 1984-02-15 1985-10-02 Fernhurst Limited Noise reducing blade/stator assembly
US6011903A (en) 1997-04-25 2000-01-04 Soundesign, L.L.C. Reduced-noise ducted flow hair dryer with multiple impellers and ambient air inlets
US6491499B1 (en) 2000-09-27 2002-12-10 Torrington Research Company Axial flow fan
JP2003093138A (ja) * 2001-09-25 2003-04-02 Matsushita Electric Works Ltd ヘアードライヤー

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 08 6 August 2003 (2003-08-06) *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2967490A1 (fr) * 2010-11-15 2012-05-18 Seb Sa Procede de mesure du bruit d'un seche-cheveux
WO2012066224A1 (fr) * 2010-11-15 2012-05-24 Seb S.A. Procede de mesure du bruit d'un seche-cheveux
CN103210288A (zh) * 2010-11-15 2013-07-17 Seb公司 吹发器的噪声测量方法
CN103210288B (zh) * 2010-11-15 2014-10-15 Seb公司 吹发器的噪声测量方法
EP3246577B1 (de) * 2015-01-16 2021-03-10 Mitsubishi Electric Corporation Gebläse und klimaanlage damit
US20180252237A1 (en) * 2017-03-01 2018-09-06 Cooler Master Co., Ltd. Impeller
CN110985412A (zh) * 2019-11-14 2020-04-10 中国航天空气动力技术研究院 一种基于非对称叶轮的低噪声多翼离心风机
CN113048086A (zh) * 2021-03-18 2021-06-29 江苏大学 一种基于径向基神经网络模型的低噪声不等距离心风扇优化设计方法
CN113048086B (zh) * 2021-03-18 2022-05-20 江苏大学 一种基于径向基神经网络模型的低噪声不等距离心风扇优化设计方法

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