EP3367840A1 - Hair dryer with improved acoustic performance - Google Patents

Hair dryer with improved acoustic performance

Info

Publication number
EP3367840A1
EP3367840A1 EP16787809.9A EP16787809A EP3367840A1 EP 3367840 A1 EP3367840 A1 EP 3367840A1 EP 16787809 A EP16787809 A EP 16787809A EP 3367840 A1 EP3367840 A1 EP 3367840A1
Authority
EP
European Patent Office
Prior art keywords
hair dryer
air
turbine
elbow
dryer according
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
EP16787809.9A
Other languages
German (de)
French (fr)
Other versions
EP3367840B1 (en
Inventor
Frédéric GILSOUL
Olivier Smal
Barry Dobson
Kunal Vyas
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.)
Babyliss Faco SPRL
Original Assignee
Babyliss Faco SPRL
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 Babyliss Faco SPRL filed Critical Babyliss Faco SPRL
Publication of EP3367840A1 publication Critical patent/EP3367840A1/en
Application granted granted Critical
Publication of EP3367840B1 publication Critical patent/EP3367840B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the present invention relates to a hair dryer with improved acoustic performance, and more particularly to a hair dryer with low noise having at its air inlet a hollow tubular elbow equipped with one or more blades.
  • FR 2 926 704; FR 2 983 043; WO 2010/045698 A1 as well as EP 2 412 272 A1 and EP 2 327 327 A1 belong to this category.
  • DE 88 05 910 U1 discloses a hair dryer with a device designed to reduce the noise.
  • the housing comprising the baffles is aligned along the same axis as the body of the hair dryer comprising the turbine.
  • JP S53 164377 U describes a hair dryer comprising an antechamber located at the rear of a main body including a turbine.
  • the flow from the antechamber to the main body of the device is through baffles to deflect the flow of air before entering the turbine.
  • the present invention aims to provide a hair dryer quieter than the devices of the state of the art, with a sound spectrum whose most troublesome frequencies have been eliminated, and constituting a good compromise between weight, l 'footprint and the cost of manufacture.
  • the present invention discloses a hair dryer comprising:
  • tubular body along a longitudinal axis with, at its opposite ends, an inlet and an outlet of air;
  • a turbine located in said tubular body which, in use, is rotated by a motor in the direction of the longitudinal axis, which allows to suck the air through the inlet and expel the air by the outlet of said tubular body, characterized in that the hairdryer comprises an air inlet bend having one or more vanes.
  • the blades are generally parallel to the curvature of the elbow;
  • the air intake elbow comprises between 3 and 6 vanes, preferably 4 or 5 vanes;
  • the air intake elbow further comprises one or more partitions dividing the vanes
  • the outlet end of said air inlet bend, at the entrance of the core of the hair dryer casing includes a section restriction, compensating for the section occupied in said bend by said blades; the distance between the blades is set such that the airflow at the outlet of the air inlet elbow and at the entrance of the core of the hair dryer casing has substantially the same speed distribution on all opening diameter;
  • the turbine has curved blades positioned on a base of substantially conical or frustoconical shape
  • constriction C restricting the passage of air and forcing the air to enter the turbine
  • the blades of the turbine are curved at an angle ⁇ between 40 and 60 °, preferably between 45 and 55 °, and particularly preferably between 48 and 53 °;
  • the turbine is driven by a motor that can be housed at least partially in the hollow portion of the cone supporting the blades of the turbine;
  • the region of reorganization of the flow (L-organize) of the hair dryer comprises the fins for rectifying the flow of air at the outlet of the turbine;
  • the air intake elbow has on its inner wall a wall-shaped sound absorption means having openings; the motor is of the brushless motor type.
  • generally parallel means that the vanes are substantially parallel to the curvature of the elbow. At most the blades are parallel to the curvature, the more the air inlet velocity profile is linear over the entire width of the inlet diameter just before the turbine. The ideal position of the blades to reduce the noise of the flow is therefore this parallel position which must be approached to the maximum for an optimal result.
  • the terms “core of the envelope” and "flux reorganization region” define regions of the tubular body of the hair dryer. According to the invention, the tubular body is composed of 3 regions.
  • the region of the "core of the envelope” is the region comprising the turbine and which is contiguous to the outlet of the air intake elbow. This region directs the flow of air around the turbine.
  • the "airflow reorganization” region is located at the outlet of the turbine 2, between the core area of the envelope and the heating zone of the 'air. It makes it possible to straighten, thanks to fins, the flow of turbulent air leaving the turbine. Finally, the air flow enters the heating zone to be heated before it leaves the appliance.
  • noise absorption means in the form of a wall it is meant that the different internal surfaces may comprise means that absorb the noise.
  • the inner parts of the hair dryer may, for example, be coated or lined with sound-absorbing elements, or even wall-like surface effects, such as perforations, openings, open-cell foam or non-fibrous fibers. -woven, etc.
  • Figure 1 shows a three-dimensional view of the hair dryer according to the invention.
  • the air intake elbow is here integrated into a decorative element drawn in the open position.
  • Figure 2 shows a simplified drawing of the three-dimensional air intake elbow with three vanes. The part to open the elbow is not shown for the sake of clarity of the figure.
  • Figures 3 and 4 show the two-part air intake elbow with a central blade for separating the two elements constituting the air inlet elbow.
  • Figure 5 shows air inlet bends with blades varying in number and positioning.
  • the figure shows examples with 3, 4 and 5 blades which are optimally positioned to generate an approximately linear air inlet velocity profile over the entire width of the inlet diameter just before the turbine.
  • Figures 6 to 10 show different types of air inlet bends according to the invention. These can have shapes ranging from simple geometries to complex geometries that do not meet any precise geometric criteria.
  • Figure 1 1 shows an example of possible turbines according to the present invention.
  • Figure 12 shows the inner casing of the hair dryer housing according to the present invention with fins for rectifying air leaving the turbine.
  • the interior of the ferrule may be lined with a sound absorption coating such as a perforated wall for example.
  • Figure 13 is a schematic representation of the hair dryer according to the invention which shows the main parameters influencing the flow of air through the device.
  • Figure 14 is a sectional representation of a preferred embodiment of the hair dryer according to the invention.
  • the present invention discloses a hair dryer 1 with improved sound performance including an air inlet bend 3 to reduce certain unpleasant frequencies to the ear, as well as the overall sound level up to 5 dB, of preferably up to 10 dB.
  • Figure 13 shows all the parameters defined for the construction of the hair dryer 1 according to the invention.
  • the apparatus has a symmetry of revolution about a central axis. he It is obvious that another configuration than that of a symmetry of revolution about a central axis is also possible and can be envisaged according to the present invention. This is the reason why we will speak rather of longitudinal axis.
  • the inlet bend 3 is compartmentalized by one or more blades 4 which substantially follow the curvature of the elbow 3. These vanes are generally 3 to 6. The best results have however been obtained with 4 or 5 blades.
  • the air velocities are such as to obtain a Reynolds number classifying the flow of the turbulent flux among the turbulent flows, the vanes 4 straighten the flow of air to make it as laminar and parallel as possible before it does not enter the tubular body of the hair dryer 1.
  • One or more partitions 5 dividing the curved vanes 4 can also have a beneficial effect on the decrease in sound level.
  • a partition 5 vertically dividing the vanes 4 also allows an easier realization of the manufacturing mold which avoids undercuts.
  • the inlet bend 3 may take different shapes and different regular or irregular curvatures, non-limiting examples are shown in Figures 6 to 10.
  • the angle of the arc formed by the air inlet bend generally varies from 20 to 120 °, preferably from 25 to 90 °, or from 30 to 80 ° and particularly preferably from 40 to 75 °.
  • the axis of the radius of the air inlet elbow may be located near or even far from the apparatus, which directly influences the length of the elbow 3.
  • the elbow 3 may also have a diameter varying along its length and that it can go up or down. All these parameters obviously can vary only by respecting the constraints of space acceptable in practice for a hair dryer.
  • the air intake elbow 3 is compartmentalized by the presence of the vanes 4.
  • the distance between the vanes 4 located in the inlet elbow 3 is preferably chosen in such a way that the pressure drop of the air flow through the compartments is the same, which makes it possible to obtain a substantially homogeneous air velocity profile over the entire section. at the air inlet, where there is a section restriction 1 1 to compensate for the section occupied by the vanes 4 and any partitions 5, just in front of the turbine 2.
  • the air intake elbow 3 is defined in the following table.
  • the air intake in front of the turbine 2 further comprises a restriction of section 1 1 to compensate for the loss of section due to the presence of blades 4 which reduce the effective diameter of the elbow.
  • the turbine 2 has curved blades 9 positioned on a base
  • the level of curvature of the blades is determined by the angle ⁇ (see Fig.13). This angle generally varies from 20 to 50 °, preferably from 25 to 40 ° or from 28 to 37 °, and particularly preferably from 30 to 35 °.
  • the cone 6 supporting the blades 9 is defined in particular by the angle ⁇ 1 formed with respect to the central axis. It may vary from 45 to 65 °, preferably from 50 to 60 °, and particularly preferably from 53 to 58 °.
  • a non-limiting example of a turbine 2 for a specific embodiment of a hair dryer 1 is given in the following table. It gives dimension reports and an actual dimension example for the execution mode represented in FIG. 13 with a right cone 6 and a shrinkage C of the envelope around the turbine 2:
  • n the minimum radius of the lower edge of the turbine blades
  • h maximum height of the blade from the base of the cone
  • ⁇ semi-angle of the cone with respect to the longitudinal axis of the hair dryer
  • ⁇ angle of inclination of the blade relative to the radial direction
  • the turbine 2 is driven by a motor 8 can be housed at least partly in the hollow portion of the cone 6 supporting the blades 9 of the turbine 2. It will preferably use a brushless motor 8 which will be less noisy than an ordinary engine.
  • the core of the envelope is the region defined by the exit of the air inlet elbow (L-shroud) before the reorganization of the air flow (L-organize) at the outlet of the turbine 2. This region is very important. It comprises the turbine 2 and determines the flow of air around it. According to a non-limiting example, the core of the envelope is defined as follows:
  • the air flow is very turbulent, which is unfavorable to the objective of reducing noise.
  • the region of reorganization of the flow (L-organize), which starts at the exit of the core of the envelope (L-shroud) and goes to the entrance of the air-heating zone (L-heater), includes fins 10 for rectifying the air flow at the outlet of the turbine 2. These fins 10 are curved towards the direction of introduction of the air leaving the turbine 2 (see Fig.12).
  • the fins have an angle ⁇ relative to the plane passing through the central axis of about 45 ° (see Figure 13).
  • the function of these fins 10 is to reduce the rotational airflow around the central axis without adding substantial turbulence.
  • the reorganization region of the stream is defined as follows:
  • the region where the air is heated comprises heating resistors and their support structure. This region begins at the end of the reorganization region of the flow (L-organize) to the exit plane of the device. Insofar as this region is of frustoconical shape and characterized by a diameter decrease at an angle ⁇ with respect to the central axis, it accelerates the flow of air.
  • Different inner parts of the housing of the hair dryer according to the invention and in particular the air inlet bend 3 can be upholstered with surfaces or walls absorbing the noise of the air flow and the turbine 2. These surfaces may be perforated partition type, open cell foam or nonwoven fibers etc.

Landscapes

  • Cleaning And Drying Hair (AREA)

Abstract

The present invention relates to a hair dryer (1) which includes a tubular body along a longitudinal axis with, at the opposite ends thereof, an air inlet and an air outlet, and a turbine (2) located inside said tubular body which, during use, is rotated by a motor (8) about the direction of the longitudinal axis, making it possible to suck in air via the inlet and to discharge air via the outlet of said tubular body, the hair dryer (1) comprising an air-inlet bend (3) comprising one or more blades (4).

Description

SECHE-CHEVEUX AUX PERFORMANCES ACOUSTIQUES AMELIOREES Objet de l'invention  HAIR DRYER WITH IMPROVED ACOUSTIC PERFORMANCE Object of the invention
[0001] La présente invention se rapporte à un sèche-cheveux aux performances acoustiques améliorées, et plus particulièrement à un sèche-cheveux avec faible niveau sonore comportant à son entrée d'air un coude tubulaire creux équipé d'une ou de plusieurs aubes.  The present invention relates to a hair dryer with improved acoustic performance, and more particularly to a hair dryer with low noise having at its air inlet a hollow tubular elbow equipped with one or more blades.
Etat de la technique State of the art
[0002] Les sèche-cheveux du marché continuent à être relativement bruyants malgré de nombreux efforts de la part des fabricants pour les rendre plus silencieux. Il existe donc une réelle demande de la part de la clientèle pour diminuer le niveau sonore et rendre le spectre des fréquences sonores émises plus agréable à l'oreille. [0002] The hairdryers on the market continue to be relatively noisy despite many efforts on the part of manufacturers to make them quieter. There is therefore a real demand on the part of customers to reduce the noise level and make the spectrum of sound frequencies emitted more pleasant to the ear.
[0003] De nombreuses tentatives ont été faites en ce sens avec un succès mitigé car les moyens disponibles pour atteindre cet objectif sont limités, plus particulièrement par les contraintes budgétaires qui ne permettent pas d'y introduire des technologies actives de diminution de bruit, comme des générateurs de sons en opposition de phase, et à cause de l'encombrement et du poids des appareils qui doit rester acceptable pour l'utilisateur. Many attempts have been made in this direction with mixed success because the means available to achieve this goal are limited, especially by budget constraints that do not allow to introduce active noise reduction technologies, such as sound generators in phase opposition, and because of the size and weight of the devices which must remain acceptable to the user.
[0004] Une des approches possibles pour réduire le niveau sonore d'un sèche- cheveux est le positionnement à l'entrée d'air d'un silencieux généralement constitué d'un capot équipé de mousses à cellules ouvertes ou encore de surfaces plissées susceptibles d'absorber le bruit engendré par le moteur et le flux d'air. Les documents FR 2 926 704 ; FR 2 983 043 ; WO 2010/045698 A1 ainsi que EP 2 412 272 A1 et EP 2 327 327 A1 appartiennent à cette catégorie. One of the possible approaches to reduce the noise level of a hair dryer is the positioning at the air intake of a silencer generally consists of a hood equipped with open cell foams or pleated surfaces susceptible to absorb the noise generated by the engine and the flow of air. FR 2 926 704; FR 2 983 043; WO 2010/045698 A1 as well as EP 2 412 272 A1 and EP 2 327 327 A1 belong to this category.
[0005] Une autre approche est celle de la diminution de la vitesse de l'air car le bruit généré par un flux d'air dans un corps creux est proportionnel à la vitesse puissance 8 (jet noise). Pour maîtriser ce phénomène, on a imaginé l'utilisation de plusieurs turbines successives. Ce type de disposition est divulgué dans WO 98/49500. [0006] Le document US 2015/0237984 A1 divulgue un sèche-cheveux haute performance avec un niveau de bruit réduit comportant un revêtement isolant tapissant l'intérieur du boîtier. Le flux d'air à l'entrée de la turbine subit une déviation particulière et la turbine comporte un anneau avec des ailettes de redressement d'un flux d'air turbulent. Another approach is that of the decrease in air speed because the noise generated by an air flow in a hollow body is proportional to the speed of power 8 (jet noise). To control this phenomenon, we imagined the use of several successive turbines. This type of arrangement is disclosed in WO 98/49500. US 2015/0237984 A1 discloses a high performance hair dryer with a reduced noise level having an insulating coating lining the inside of the housing. The flow of air at the inlet of the turbine undergoes a particular deviation and the turbine comprises a ring with fins for rectifying a turbulent air flow.
[0007] Le document DE 88 05 910 U1 divulgue un sèche-cheveux avec un dispositif conçu pour diminuer le bruit. Le flux d'air, avant de passer par la turbine, rentre dans un boîtier comprenant des chicanes. Le boîtier comprenant les chicanes est aligné selon le même axe que le corps du sèche-cheveux comprenant la turbine.  [0007] DE 88 05 910 U1 discloses a hair dryer with a device designed to reduce the noise. The air flow, before passing through the turbine, enters a housing comprising baffles. The housing comprising the baffles is aligned along the same axis as the body of the hair dryer comprising the turbine.
[0008] Le document JP S53 164377 U décrit un sèche-cheveux comprenant une antichambre située à l'arrière d'un corps principal englobant une turbine. Le passage du flux de l'antichambre vers le corps principal de l'appareil se fait à travers des chicanes permettant de dévier le flux d'air avant d'entrer dans la turbine. [0008] JP S53 164377 U describes a hair dryer comprising an antechamber located at the rear of a main body including a turbine. The flow from the antechamber to the main body of the device is through baffles to deflect the flow of air before entering the turbine.
[0009] A notre connaissance, il n'existe pas à l'heure actuelle sur le marché un sèche-cheveux constituant un compromis satisfaisant entre le poids, l'encombrement et le coût de fabrication, et des performances acoustiques acceptables. To our knowledge, there is currently no on the market a hairdryer constituting a satisfactory compromise between weight, size and manufacturing cost, and acceptable acoustic performance.
Buts de l'invention Goals of the invention
[0010] La présente invention vise à fournir un sèche-cheveux plus silencieux que les appareils de l'état de la technique, avec un spectre sonore dont les fréquences les plus gênantes ont été éliminées, et constituant un bon compromis entre le poids, l'encombrement et le coût de fabrication.  The present invention aims to provide a hair dryer quieter than the devices of the state of the art, with a sound spectrum whose most troublesome frequencies have been eliminated, and constituting a good compromise between weight, l 'footprint and the cost of manufacture.
Résumé de l'invention Summary of the invention
[0011] La présente invention divulgue un sèche-cheveux comprenant : The present invention discloses a hair dryer comprising:
- un corps tubulaire selon un axe longitudinal avec, à ses extrémités opposées, une entrée et une sortie d'air;  a tubular body along a longitudinal axis with, at its opposite ends, an inlet and an outlet of air;
- une turbine située dans ledit corps tubulaire qui, en utilisation, est entraînée en rotation par un moteur selon la direction de l'axe longitudinal, ce qui permet d'aspirer l'air par l'entrée et d'expulser l'air par la sortie dudit corps tubulaire, caractérisé en ce que le sèche-cheveux comprend un coude d'entrée d'air comportant une ou plusieurs aubes.  - A turbine located in said tubular body which, in use, is rotated by a motor in the direction of the longitudinal axis, which allows to suck the air through the inlet and expel the air by the outlet of said tubular body, characterized in that the hairdryer comprises an air inlet bend having one or more vanes.
[0012] Les modes d'exécution préférés de l'invention comportent au moins une, ou une combinaison quelconque appropriée des caractéristiques suivantes :  Preferred embodiments of the invention comprise at least one or any suitable combination of the following features:
- les aubes sont globalement parallèles à la courbure du coude; le coude d'entrée d'air comporte entre 3 et 6 aubes, de préférence 4 ou 5 aubes; the blades are generally parallel to the curvature of the elbow; the air intake elbow comprises between 3 and 6 vanes, preferably 4 or 5 vanes;
le coude d'entrée d'air comporte en outre une ou plusieurs cloisons divisant les aubes;  the air intake elbow further comprises one or more partitions dividing the vanes;
l'extrémité de sortie dudit coude d'entrée d'air, à l'entrée du cœur de l'enveloppe du sèche-cheveux, comprend une restriction de section, compensant la section occupée dans ledit coude par lesdites aubes; la distance entre les aubes est fixée de telle manière que le flux d'air à la sortie du coude d'entrée d'air et à l'entrée du cœur de l'enveloppe du sèche-cheveux possède substantiellement la même répartition de vitesse sur tout le diamètre d'ouverture;  the outlet end of said air inlet bend, at the entrance of the core of the hair dryer casing, includes a section restriction, compensating for the section occupied in said bend by said blades; the distance between the blades is set such that the airflow at the outlet of the air inlet elbow and at the entrance of the core of the hair dryer casing has substantially the same speed distribution on all opening diameter;
la turbine comporte des pales incurvées positionnées sur une base de forme essentiellement conique ou tronconique ;  the turbine has curved blades positioned on a base of substantially conical or frustoconical shape;
entre le cœur de l'enveloppe et la turbine, il y a un rétrécissement C restreignant le passage de l'air et obligeant l'air à pénétrer dans la turbine ;  between the core of the shell and the turbine, there is a constriction C restricting the passage of air and forcing the air to enter the turbine;
les pales de la turbine sont incurvées selon un angle ω compris entre 40 et 60°, de préférence entre 45 et 55°, et de manière particulièrement préférée entre 48 et 53° ;  the blades of the turbine are curved at an angle ω between 40 and 60 °, preferably between 45 and 55 °, and particularly preferably between 48 and 53 °;
la turbine est entraînée par un moteur pouvant se loger au moins partiellement dans la partie creuse du cône supportant les pales de la turbine ;  the turbine is driven by a motor that can be housed at least partially in the hollow portion of the cone supporting the blades of the turbine;
la région de réorganisation du flux (L-organiser) du sèche-cheveux comporte les ailettes de redressement du flux d'air à la sortie de la turbine ;  the region of reorganization of the flow (L-organize) of the hair dryer comprises the fins for rectifying the flow of air at the outlet of the turbine;
le coude d'entrée d'air comporte sur sa paroi interne un moyen d'absorption du bruit sous forme de paroi comportant des ouvertures ; le moteur est du type moteur sans balais. [0013] Par « globalement » parallèles, on entend que les aubes sont substantiellement parallèles à la courbure du coude. Au plus les aubes sont parallèles à la courbure, au plus le profil de vitesse d'entrée d'air est linéaire sur toute la largeur du diamètre d'entrée juste avant la turbine. La position idéale des aubes pour diminuer le bruit du flux est donc cette position parallèle qui doit être approchée au maximum pour un résultat optimal. [0014] Les termes « cœur de l'enveloppe » et « région de réorganisation du flux » définissent des régions du corps tubulaire du sèche-cheveux. Selon l'invention, le corps tubulaire est composé de 3 régions. Celles-ci sont nommées, en partant de l'extrémité du corps permettant l'entrée d'air vers l'extrémité de sortie d'air, le « cœur de l'enveloppe », la « région de réorganisation du flux » et la « zone de chauffage de l'air ». La région du « cœur de l'enveloppe » (nommée « L-shroud » sur la Figure 13) est la région comprenant la turbine et qui est accolée à la sortie du coude d'entrée d'air. Cette région permet de diriger le flux d'air autour de la turbine. La région de « réorganisation du flux d'air » (nommée « L-organiser» sur la Figure 13), est située à la sortie de la turbine 2, entre la région du cœur de l'enveloppe et la zone de chauffage de l'air. Elle permet de redresser, grâce à des ailettes, le flux d'air turbulent sortant de la turbine. En dernier lieu, le flux d'air entre dans la zone de chauffage afin d'y être chauffé avant sa sortie de l'appareil. the air intake elbow has on its inner wall a wall-shaped sound absorption means having openings; the motor is of the brushless motor type. By "generally" parallel means that the vanes are substantially parallel to the curvature of the elbow. At most the blades are parallel to the curvature, the more the air inlet velocity profile is linear over the entire width of the inlet diameter just before the turbine. The ideal position of the blades to reduce the noise of the flow is therefore this parallel position which must be approached to the maximum for an optimal result. The terms "core of the envelope" and "flux reorganization region" define regions of the tubular body of the hair dryer. According to the invention, the tubular body is composed of 3 regions. These are named, starting from the end of the body allowing the entry of air towards the exit end of air, the "heart of the envelope", the "reorganization region of the flow" and the "Air heating zone". The region of the "core of the envelope" (named "L-shroud" in Figure 13) is the region comprising the turbine and which is contiguous to the outlet of the air intake elbow. This region directs the flow of air around the turbine. The "airflow reorganization" region (named "L-organize" in Figure 13) is located at the outlet of the turbine 2, between the core area of the envelope and the heating zone of the 'air. It makes it possible to straighten, thanks to fins, the flow of turbulent air leaving the turbine. Finally, the air flow enters the heating zone to be heated before it leaves the appliance.
[0015] Par «moyen d'absorption du bruit sous forme de paroi», on entend que les différentes surfaces internes peuvent comprendre des moyens absorbant le bruit. Les parties internes du sèche-cheveux peuvent par exemple être revêtues ou tapissées d'éléments absorbant le bruit, ou même d'effets de surfaces dans les parois, comme des perforations, des ouvertures, de la mousse à cellules ouvertes ou encore des fibres non-tissées, etc. By "noise absorption means in the form of a wall", it is meant that the different internal surfaces may comprise means that absorb the noise. The inner parts of the hair dryer may, for example, be coated or lined with sound-absorbing elements, or even wall-like surface effects, such as perforations, openings, open-cell foam or non-fibrous fibers. -woven, etc.
Brève description des figures  Brief description of the figures
[0016] La figure 1 représente une vue en trois dimensions du sèche-cheveux selon l'invention. Le coude d'entrée d'air est ici intégré dans un élément décoratif dessiné en position ouverte.  Figure 1 shows a three-dimensional view of the hair dryer according to the invention. The air intake elbow is here integrated into a decorative element drawn in the open position.
[0017] La figure 2 représente un dessin simplifié du coude d'entrée d'air en trois dimensions avec trois aubes. La partie permettant d'ouvrir le coude n'est pas représentée pour les besoins de clarté de la figure. Figure 2 shows a simplified drawing of the three-dimensional air intake elbow with three vanes. The part to open the elbow is not shown for the sake of clarity of the figure.
[0018] Les figures 3 et 4 représentent le coude d'entrée d'air en deux parties avec une aube centrale permettant la séparation des deux éléments constituant le coude d'entrée d'air.  Figures 3 and 4 show the two-part air intake elbow with a central blade for separating the two elements constituting the air inlet elbow.
[0019] La figure 5 représente des coudes d'entrée d'air avec des aubes variant en nombre et en positionnement. La figure représente des exemples avec 3, 4 et 5 aubes qui sont positionnées de manière optimale pour générer un profil de vitesse d'entrée d'air à peu près linéaire sur toute la largeur du diamètre d'entrée juste avant la turbine. [0020] Les figures 6 à 10 montrent différents types de coudes d'entrée d'air selon l'invention. Ceux-ci peuvent avoir des formes allant de géométries simples à des géométries complexes ne répondant à aucun critère géométrique précis. Figure 5 shows air inlet bends with blades varying in number and positioning. The figure shows examples with 3, 4 and 5 blades which are optimally positioned to generate an approximately linear air inlet velocity profile over the entire width of the inlet diameter just before the turbine. Figures 6 to 10 show different types of air inlet bends according to the invention. These can have shapes ranging from simple geometries to complex geometries that do not meet any precise geometric criteria.
[0021] La figure 1 1 montre un exemple de turbines possibles selon la présente invention. [0021] Figure 1 1 shows an example of possible turbines according to the present invention.
[0022] La figure 12 montre l'enveloppe intérieure du boîtier du sèche-cheveux selon la présente invention avec des ailettes de redressement de l'air sortant de la turbine. L'intérieur de la virole peut être tapissé d'un revêtement d'absorption de bruit comme une paroi perforée par exemple.  Figure 12 shows the inner casing of the hair dryer housing according to the present invention with fins for rectifying air leaving the turbine. The interior of the ferrule may be lined with a sound absorption coating such as a perforated wall for example.
[0023] La figure 13 est une représentation schématique du sèche-cheveux selon l'invention qui reprend les paramètres principaux influençant le flux d'air à travers l'appareil. Figure 13 is a schematic representation of the hair dryer according to the invention which shows the main parameters influencing the flow of air through the device.
[0024] La figure 14 est une représentation en coupe d'un mode d'exécution préféré du sèche-cheveux selon l'invention.  Figure 14 is a sectional representation of a preferred embodiment of the hair dryer according to the invention.
[0025] Liste des symboles de référence List of reference symbols
1 . Sèche-cheveux  1. Hair dryer
2. Turbine  2. Turbine
3. Coude d'entrée d'air  3. Air inlet elbow
4. Aubes du coude d'entrée d'air  4. Air inlet elbow vanes
5. Cloison divisant les aubes  5. Partition dividing the vanes
6. Cône de la turbine  6. Turbine cone
7. Poignée  7. Handle
8. Moteur  8. Engine
9. Pales  9. Blades
10. Ailettes de redressement  10. Straightening fins
1 1 . Restriction de section à la sortie du coude et à l'entrée de la turbine  1 1. Section restriction at the outlet of the elbow and at the inlet of the turbine
Description détaillée de l'invention Detailed description of the invention
[0026] La présente invention divulgue un sèche-cheveux 1 aux performances sonores améliorées comportant un coude d'entrée d'air 3 permettant de réduire certaines fréquences désagréables à l'oreille, ainsi que le niveau sonore global jusqu'à 5 dB, de préférence jusqu'à 10 dB. The present invention discloses a hair dryer 1 with improved sound performance including an air inlet bend 3 to reduce certain unpleasant frequencies to the ear, as well as the overall sound level up to 5 dB, of preferably up to 10 dB.
[0027] La figure 13 reprend l'ensemble des paramètres définis pour la construction du sèche-cheveux 1 selon l'invention. Pour la simplification de l'illustration de l'invention, l'appareil présente une symétrie de révolution autour d'un axe central. Il est évident qu'une autre configuration que celle d'une symétrie de révolution autour d'un axe central est également possible et peut être envisagée selon la présente invention. C'est la raison pour laquelle nous parlerons plutôt d'axe longitudinal. Figure 13 shows all the parameters defined for the construction of the hair dryer 1 according to the invention. For simplification of the illustration of the invention, the apparatus has a symmetry of revolution about a central axis. he It is obvious that another configuration than that of a symmetry of revolution about a central axis is also possible and can be envisaged according to the present invention. This is the reason why we will speak rather of longitudinal axis.
[0028] Le coude d'entrée d'air 3 est compartimenté par une ou plusieurs aubes 4 qui suivent substantiellement la courbure du coude 3. Ces aubes sont généralement au nombre de 3 à 6. Les meilleurs résultats ont cependant été obtenus avec 4 ou 5 aubes. Bien que les vitesses d'air soient de nature à obtenir un nombre de Reynolds classant l'écoulement de celui-ci parmi les flux turbulents, les aubes 4 redressent le flux d'air pour le rendre aussi laminaire et parallèle que possible avant qu'il ne pénètre dans le corps tubulaire du sèche-cheveux 1 . Les aubes (n = 1 ; 2 ; 3 ; 4 ; 5 ; 6...) constituent en outre une barrière sonore entre le compartiment turbine/moteur et l'extérieur du sèche-cheveux 1. The inlet bend 3 is compartmentalized by one or more blades 4 which substantially follow the curvature of the elbow 3. These vanes are generally 3 to 6. The best results have however been obtained with 4 or 5 blades. Although the air velocities are such as to obtain a Reynolds number classifying the flow of the turbulent flux among the turbulent flows, the vanes 4 straighten the flow of air to make it as laminar and parallel as possible before it does not enter the tubular body of the hair dryer 1. The blades (n = 1; 2; 3; 4; 5; 6 ...) also constitute a sound barrier between the turbine / engine compartment and the outside of the hair dryer 1.
[0029] Une ou plusieurs cloisons 5 divisant les aubes 4 courbées peuvent également avoir un effet bénéfique sur la diminution du niveau sonore. Une cloison 5 divisant verticalement les aubes 4 permet par ailleurs une réalisation plus aisée du moule de fabrication qui évite des contre-dépouilles.  One or more partitions 5 dividing the curved vanes 4 can also have a beneficial effect on the decrease in sound level. A partition 5 vertically dividing the vanes 4 also allows an easier realization of the manufacturing mold which avoids undercuts.
[0030] Le coude d'entrée d'air 3 peut prendre différentes formes et différentes courbures régulières ou irrégulières, des exemples non limitatifs sont représentés aux figures 6 à 10. Lorsque le coude 3 s'inscrit dans un cercle, l'angle de l'arc a formé par le coude d'entrée d'air varie généralement de 20 à 120°, de préférence de 25 à 90°, ou encore de 30 à 80° et de manière particulièrement préférée de 40 à 75°. L'axe du rayon du coude d'entrée d'air peut être situé proche ou même éloigné de l'appareil, ce qui influence directement la longueur du coude 3. Le coude 3 peut aussi avoir un diamètre variant sur sa longueur et celui-ci peut aller en augmentant ou en diminuant. Tous ces paramètres ne peuvent évidemment varier qu'en respectant les contraintes d'encombrement acceptables en pratique pour un sèche-cheveux.  The inlet bend 3 may take different shapes and different regular or irregular curvatures, non-limiting examples are shown in Figures 6 to 10. When the elbow 3 is part of a circle, the angle of the arc formed by the air inlet bend generally varies from 20 to 120 °, preferably from 25 to 90 °, or from 30 to 80 ° and particularly preferably from 40 to 75 °. The axis of the radius of the air inlet elbow may be located near or even far from the apparatus, which directly influences the length of the elbow 3. The elbow 3 may also have a diameter varying along its length and that it can go up or down. All these parameters obviously can vary only by respecting the constraints of space acceptable in practice for a hair dryer.
[0031] Pour redresser le flux d'air à l'entrée de la turbine 2, le coude d'entrée d'air 3 est compartimenté par la présence des aubes 4. La distance entre les aubes 4 situées dans le coude d'entrée d'air 3 est choisie de préférence de telle manière que la perte de charge de l'écoulement d'air à travers les compartiments est la même, ce qui permet d'obtenir un profil de vitesse d'air pratiquement homogène sur toute la section à l'entrée de l'air, endroit où se trouve une restriction de section 1 1 pour compenser la section occupée par les aubes 4 et éventuelles cloisons 5, juste devant la turbine 2. To straighten the flow of air at the inlet of the turbine 2, the air intake elbow 3 is compartmentalized by the presence of the vanes 4. The distance between the vanes 4 located in the inlet elbow 3 is preferably chosen in such a way that the pressure drop of the air flow through the compartments is the same, which makes it possible to obtain a substantially homogeneous air velocity profile over the entire section. at the air inlet, where there is a section restriction 1 1 to compensate for the section occupied by the vanes 4 and any partitions 5, just in front of the turbine 2.
[0032] On sait que la perte de charge dans un tuyau pour un écoulement laminaire dépend au moins de la longueur, de la section et du périmètre ainsi que de la rugosité de surface, que l'on suppose être la même pour tous les compartiments. Cette perte de charge peut être calculée par des formules complexes faisant intervenir notamment la rugosité de surface, la température, la vitesse d'écoulement, etc. Les formules sont généralement réductrices car basées sur des géométries simples. Dans la présente invention, nous ne sommes cependant pas dans le cas d'un écoulement laminaire et des profils de vitesses d'air homogènes à la sortie du coude 3 compartimenté par des aubes 4 n'ont pu être obtenus qu'expérimentalement en disposant les aubes 4, et notamment les distances entre aubes, de manière empirique par essai et erreur. It is known that the pressure drop in a pipe for a laminar flow depends at least on the length, the section and the perimeter as well as the surface roughness, which is assumed to be the same for all compartments. . This Pressure drop can be calculated by complex formulas involving surface roughness, temperature, flow velocity, etc. The formulas are generally reductive because they are based on simple geometries. In the present invention, however, we are not in the case of a laminar flow and homogeneous air velocity profiles at the outlet of the elbow 3 compartmentalized by vanes 4 could only be obtained experimentally by arranging them. blades 4, and in particular the distances between vanes, empirically by trial and error.
[0033] Selon un exemple, le coude d'entrée d'air 3 est défini dans le tableau suivant. La valeur se rapporte au diamètre D = 2R de la base du cône 6 supportant les pales 9 de la turbine 2. (voir Figure 13 ou le rayon du cône est indiqué)  In one example, the air intake elbow 3 is defined in the following table. The value refers to the diameter D = 2R of the base of the cone 6 supporting the blades 9 of the turbine 2. (see Figure 13 where the radius of the cone is indicated)
Table 1 : Coude d'entrée d'air Table 1: Air Inlet Elbow
[0034] Comme déjà évoqué plus haut, l'entrée d'air devant la turbine 2 comporte en outre une restriction de section 1 1 pour compenser la perte de section due à la présence des aubes 4 qui réduisent le diamètre effectif du coude d'entrée d'air et qui constituent aussi un obstacle à l'écoulement de l'air à l'entrée du sèche-cheveux, le but étant que le flux d'air n'entre pas dans un diamètre effectif plus grand après avoir traversé le coude d'entrée d'air 3. As already mentioned above, the air intake in front of the turbine 2 further comprises a restriction of section 1 1 to compensate for the loss of section due to the presence of blades 4 which reduce the effective diameter of the elbow. air intake and which also constitute an obstacle to the flow of air at the entrance of the hair dryer, the aim being that the air flow does not enter a larger effective diameter after having crossed the inlet bend 3.
[0035] La turbine 2 comporte des pales 9 incurvées positionnées sur une base The turbine 2 has curved blades 9 positioned on a base
6 de forme essentiellement conique ou tronconique (voir Fig.1 1 ). Le niveau de courbure des pales est déterminé par l'angle ω (voir Fig.13). Cet angle varie généralement de 20 à 50°, de préférence de 25 à 40° ou de 28 à 37°, et de manière particulièrement préférée de 30 à 35°. 6 of substantially conical or frustoconical shape (see Fig.1 1). The level of curvature of the blades is determined by the angle ω (see Fig.13). This angle generally varies from 20 to 50 °, preferably from 25 to 40 ° or from 28 to 37 °, and particularly preferably from 30 to 35 °.
[0036] Le cône 6 supportant les pales 9 est défini notamment par l'angle Θ1 formé par rapport à l'axe central. Il peut varier de 45 à 65°, de préférence de 50 à 60°, et de manière particulièrement préférée de 53 à 58°.  The cone 6 supporting the blades 9 is defined in particular by the angle Θ1 formed with respect to the central axis. It may vary from 45 to 65 °, preferably from 50 to 60 °, and particularly preferably from 53 to 58 °.
[0037] Un exemple non limitatif de turbine 2 pour un mode de réalisation spécifique d'un sèche-cheveux 1 est donné dans le tableau suivant. Il donne des rapports de dimension et un exemple de dimension réelle pour le mode d'exécution représenté à la figure 13 avec un cône 6 droit et un rétrécissement C de l'enveloppe autour de la turbine 2: A non-limiting example of a turbine 2 for a specific embodiment of a hair dryer 1 is given in the following table. It gives dimension reports and an actual dimension example for the execution mode represented in FIG. 13 with a right cone 6 and a shrinkage C of the envelope around the turbine 2:
Table 2: Turbine Table 2: Turbine
n = le rayon minimum du bord inférieur des pales de la turbine n = the minimum radius of the lower edge of the turbine blades
r0= le rayon maximum extérieur r 0 = the maximum outside radius
h = hauteur maximum de la pale à partir de la base du cône h = maximum height of the blade from the base of the cone
Θ = semi-angle du cône par rapport à l'axe longitudinal du sèche-cheveux Θ = semi-angle of the cone with respect to the longitudinal axis of the hair dryer
ω = angle d'inclinaison de la pâle par rapport à la direction radiale ω = angle of inclination of the blade relative to the radial direction
[0038] La turbine 2 est entraînée par un moteur 8 pouvant se loger au moins en partie dans la partie creuse du cône 6 supportant les pales 9 de la turbine 2. On utilisera de préférence un moteur 8 sans balai qui sera moins bruyant qu'un moteur ordinaire. The turbine 2 is driven by a motor 8 can be housed at least partly in the hollow portion of the cone 6 supporting the blades 9 of the turbine 2. It will preferably use a brushless motor 8 which will be less noisy than an ordinary engine.
[0039] Le cœur de l'enveloppe est la région définie par la sortie du coude d'entrée d'air (L-shroud) avant la réorganisation du flux d'air (L-organiser) à la sortie de la turbine 2. Cette région est très importante. Elle comporte la turbine 2 et détermine le flux d'air autour de celle-ci. Selon un exemple non limitatif, le cœur de l'enveloppe est défini de la manière suivante :  The core of the envelope is the region defined by the exit of the air inlet elbow (L-shroud) before the reorganization of the air flow (L-organize) at the outlet of the turbine 2. This region is very important. It comprises the turbine 2 and determines the flow of air around it. According to a non-limiting example, the core of the envelope is defined as follows:
Table 3 : Cœur de l'enveloppe Table 3: Heart of the envelope
[0040] A la sortie de la turbine 2, l'écoulement d'air est très turbulent, ce qui est défavorable à l'objectif de diminution du bruit. Pour cette raison, la région de réorganisation du flux (L-organiser), qui commence à la sortie du cœur de l'enveloppe (L-shroud) et va jusqu'à l'entrée de la zone de chauffage de l'air (L-heater), comporte des ailettes 10 de redressement du flux d'air à la sortie de la turbine 2. Ces ailettes 10 sont incurvées vers le sens d'introduction de l'air sortant de la turbine 2 (voir Fig.12). At the outlet of the turbine 2, the air flow is very turbulent, which is unfavorable to the objective of reducing noise. For this reason, the region of reorganization of the flow (L-organize), which starts at the exit of the core of the envelope (L-shroud) and goes to the entrance of the air-heating zone (L-heater), includes fins 10 for rectifying the air flow at the outlet of the turbine 2. These fins 10 are curved towards the direction of introduction of the air leaving the turbine 2 (see Fig.12).
[0041] Les ailettes ont un angle φ par rapport au plan qui passe par l'axe central d'environ 45 ° (voir Figure 13). La fonction de ces ailettes 10 est de réduire le flux d'air rotationnel autour de l'axe central sans ajouter des turbulences substantielles. The fins have an angle φ relative to the plane passing through the central axis of about 45 ° (see Figure 13). The function of these fins 10 is to reduce the rotational airflow around the central axis without adding substantial turbulence.
Selon un exemple non limitatif, la région de réorganisation du flux est définie de la manière suivante : According to a non-limiting example, the reorganization region of the stream is defined as follows:
Table 4: Région de réorganisation du flux [0042] La région où l'air est chauffé (L-heater) comporte des résistances chauffantes et leur structure de support. Cette région commence à la fin de la région de réorganisation du flux (L-organiser) jusqu'au plan de sortie de l'appareil. Dans la mesure où cette région est de forme tronconique et caractérisée par une diminution de diamètre selon un angle β par rapport à l'axe central, elle accélère le flux d'air. Table 4: Flux Reorganization Region [0042] The region where the air is heated (L-heater) comprises heating resistors and their support structure. This region begins at the end of the reorganization region of the flow (L-organize) to the exit plane of the device. Insofar as this region is of frustoconical shape and characterized by a diameter decrease at an angle β with respect to the central axis, it accelerates the flow of air.
Table 5: Zone de chauffage Table 5: Heating zone
[0043] Différentes parties intérieures du boîtier du sèche-cheveux selon l'invention et notamment du coude d'entrée d'air 3 peuvent être tapissées avec des surfaces ou des parois absorbant le bruit du flux d'air et de la turbine 2. Ces surfaces peuvent être du type cloison perforée, mousse à cellules ouvertes ou encore fibres non-tissées etc. Different inner parts of the housing of the hair dryer according to the invention and in particular the air inlet bend 3 can be upholstered with surfaces or walls absorbing the noise of the air flow and the turbine 2. These surfaces may be perforated partition type, open cell foam or nonwoven fibers etc.

Claims

REVENDICATIONS
1. Sèche-cheveux (1 ) comprenant : Hair dryer (1) comprising:
- un corps tubulaire selon un axe longitudinal avec, à ses extrémités opposées, une entrée et une sortie d'air;  a tubular body along a longitudinal axis with, at its opposite ends, an inlet and an outlet of air;
- une turbine (2) située dans ledit corps tubulaire qui, en utilisation, est entraînée en rotation par un moteur (8) selon la direction de l'axe longitudinal, ce qui permet d'aspirer l'air par l'entrée et d'expulser l'air par la sortie dudit corps tubulaire, caractérisé en ce que le sèche-cheveux (1 ) comprend :  - a turbine (2) located in said tubular body which, in use, is rotated by a motor (8) in the direction of the longitudinal axis, which allows to suck air through the inlet and d expelling the air through the outlet of said tubular body, characterized in that the hair dryer (1) comprises:
- un coude (3) d'entrée d'air comportant une ou plusieurs aubes (4). - An air inlet bend (3) comprising one or more vanes (4).
2. Sèche-cheveux selon la revendication 1 dans lequel les aubes (4) sont globalement parallèles à la courbure du coude (3).  2. Hair dryer according to claim 1 wherein the blades (4) are generally parallel to the curvature of the elbow (3).
3. Sèche-cheveux selon la revendication 1 ou 2 dans lequel le coude (3) d'entrée d'air comporte entre 3 et 6 aubes (4), de préférence 4 ou 5 aubes (4).  3. Hair dryer according to claim 1 or 2 wherein the elbow (3) air inlet comprises between 3 and 6 blades (4), preferably 4 or 5 blades (4).
4. Sèche-cheveux selon l'une quelconque des revendications précédentes, caractérisé en ce que le coude (3) d'entrée d'air comporte en outre une ou plusieurs cloisons (5) divisant les aubes (4).  4. Hair dryer according to any one of the preceding claims, characterized in that the elbow (3) of air inlet further comprises one or more partitions (5) dividing the vanes (4).
5. Sèche-cheveux selon l'une quelconque des revendications précédentes, caractérisé en ce que l'extrémité de sortie dudit coude (3) d'entrée d'air, à l'entrée du cœur de l'enveloppe du sèche-cheveux, comprend une restriction de section (1 1 ), compensant la section occupée dans ledit coude (3) par lesdites aubes (4).  5. Hair dryer according to any one of the preceding claims, characterized in that the outlet end of said elbow (3) air inlet at the entrance of the heart of the envelope of the hair dryer, comprises a section restriction (1 1), compensating the section occupied in said elbow (3) by said vanes (4).
6. Sèche-cheveux selon l'une quelconque des revendications précédentes, caractérisé en ce que la distance entre les aubes (4) est fixée de telle manière que le flux d'air à la sortie du coude (3) d'entrée d'air et à l'entrée du cœur de l'enveloppe du sèche-cheveux (1 ) possède substantiellement la même répartition de vitesse sur tout le diamètre d'ouverture.  Hair dryer according to one of the preceding claims, characterized in that the distance between the vanes (4) is set in such a way that the air flow at the outlet of the inlet elbow (3) air and at the entrance of the heart of the hair dryer casing (1) has substantially the same speed distribution over the entire opening diameter.
7. Sèche-cheveux selon l'une quelconque des revendications précédentes, caractérisé en ce que la turbine (2) comporte des pales (9) incurvées positionnées sur une base de forme essentiellement conique ou tronconique.  7. Hair dryer according to any one of the preceding claims, characterized in that the turbine (2) has blades (9) curved positioned on a base of substantially conical or frustoconical shape.
8. Sèche-cheveux selon l'une quelconque des revendications précédentes, caractérisé en ce qu'entre le cœur de l'enveloppe et la turbine (2), il y a un rétrécissement C restreignant le passage de l'air et obligeant l'air à pénétrer dans la turbine (2).  8. Hair dryer according to any one of the preceding claims, characterized in that between the core of the casing and the turbine (2), there is a constriction C restricting the passage of air and forcing the air to enter the turbine (2).
9. Sèche-cheveux selon l'une quelconque des revendications précédentes, caractérisé en ce que les pales (9) de la turbine (2) sont incurvées selon un angle ω compris entre 40 et 60°, de préférence entre 45 et 55°, et de manière particulièrement préférée entre 48 et 53°. 9. Hair dryer according to any one of the preceding claims, characterized in that the blades (9) of the turbine (2) are curved according to an angle ω between 40 and 60 °, preferably between 45 and 55 °, and particularly preferably between 48 and 53 °.
10. Sèche-cheveux selon l'une quelconque des revendications précédentes, caractérisé en ce que la turbine (2) est entraînée par un moteur (8) pouvant se loger au moins partiellement dans la partie creuse du cône (6) supportant les pales de la turbine (2).  10. Hair dryer according to any one of the preceding claims, characterized in that the turbine (2) is driven by a motor (8) which can be housed at least partially in the hollow portion of the cone (6) supporting the blades of the turbine (2).
11. Sèche-cheveux selon l'une quelconque des revendications précédentes, caractérisé en ce que la région de réorganisation du flux (L-organiser) du sèche-cheveux comporte les ailettes de redressement (10) du flux d'air à la sortie de la turbine (2).  11. Hair dryer according to any one of the preceding claims, characterized in that the reorganization region of the flow (L-arrange) of the hair dryer comprises the rectifying fins (10) of the air flow at the outlet of the turbine (2).
12. Sèche-cheveux selon l'une quelconque des revendications précédentes, dans lequel le coude (3) d'entrée d'air comporte sur sa paroi interne un moyen d'absorption du bruit sous forme de paroi comportant des ouvertures.  12. Hair dryer according to any one of the preceding claims, wherein the elbow (3) of air inlet has on its inner wall wall-like sound absorption means having openings.
13. Sèche-cheveux selon l'une quelconque des revendications précédentes dans lequel le moteur (8) est du type moteur sans balais.  13. Hair dryer according to any one of the preceding claims wherein the motor (8) is of the brushless motor type.
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FR2967335B1 (en) * 2010-11-15 2013-06-07 Seb Sa HAIRDRYER WITH CENTRIFUGAL FAN
FR2982748B1 (en) * 2011-11-18 2014-04-04 Seb Sa HAIRDRYER WITH PARTICULAR MEANS OF GRIPPING
TW201320921A (en) 2011-11-29 2013-06-01 rui-hong Yang Noise reduction structure of hair dryer
GB201211253D0 (en) * 2012-06-25 2012-08-08 Jemella Ltd Hair dryer
EP2818074A1 (en) * 2013-06-28 2014-12-31 Babyliss Faco S.P.R.L. Hair styling device
US20150201730A1 (en) * 2014-01-23 2015-07-23 Conair Corporation Hair dryer apparatus with noise reducing end cap
BR102014004615A2 (en) 2014-02-26 2015-12-22 Engereus Do Brasil Engenharia E Ind Eletro Eletrônica Imp Ação E Exportação Ltda high performance hair dryer

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CN108348060A (en) 2018-07-31
ES2817535T3 (en) 2021-04-07
EP3367840B1 (en) 2020-07-08
WO2017072112A1 (en) 2017-05-04

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