EP2779863B1 - Hairdryer with concentric blades - Google Patents

Hairdryer with concentric blades Download PDF

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Publication number
EP2779863B1
EP2779863B1 EP12795548.2A EP12795548A EP2779863B1 EP 2779863 B1 EP2779863 B1 EP 2779863B1 EP 12795548 A EP12795548 A EP 12795548A EP 2779863 B1 EP2779863 B1 EP 2779863B1
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EP
European Patent Office
Prior art keywords
tubular body
hair dryer
longitudinal axis
dryer according
outlet
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.)
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Application number
EP12795548.2A
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German (de)
French (fr)
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EP2779863A1 (en
Inventor
Benoît LINGLIN
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SEB SA
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SEB SA
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Publication of EP2779863A1 publication Critical patent/EP2779863A1/en
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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
    • 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
    • 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
    • A45D20/22—Helmets with hot air supply or ventilating means, e.g. electrically heated air current
    • A45D20/38—Arrangement of the electric heating means
    • 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
    • A45D20/22—Helmets with hot air supply or ventilating means, e.g. electrically heated air current
    • A45D20/42—Additional devices or measures, e.g. for noise damping, for musical entertainment

Definitions

  • the present invention relates to the technical field of hair dryers and, more particularly, electric hand-held hairdryers used by professionals and / or individuals.
  • a hand-held hairdryer generally comprises an elongated tubular body which contains a motor-fan unit formed of a propeller integral with the drive shaft of an electric motor.
  • the electric motor is held in the tubular body by rigid arms which ensure the centering of the helix relative to the inner wall of the tubular body.
  • the tubular body is equipped with a handle comprising a connection cord to the electrical network and control members of the operation of the electric motor.
  • the motorcycle fan unit draws air through an inlet located at the rear of the tubular body to push back through an outlet located at the front of the latter.
  • the hair dryer also comprises, downstream of the propeller, means for electric heating of the blown air.
  • Such a hair dryer gives satisfaction with regard to its primary function of drying hair.
  • known hairdryers have the disadvantage of being particularly noisy which induces fatigue during their prolonged use by a professional or a nuisance for the user and those around him.
  • This noise nuisance results in particular from the speed of rotation of the engine which is generally between 7000 and 16000 rpm.
  • One way to limit noise pollution is to reduce the speed of rotation of the motor.
  • the speed of rotation is reduced, it becomes necessary, to maintain a satisfactory air flow, to increase the diameter of the propeller.
  • such an increase in the diameter of the helix modifies the proportions of the hair dryer which can be difficult to handle if it has a typical configuration of the pistol type with a handle extending perpendicular to the blowing axis of the hair dryer.
  • increasing the diameter of the helix induces such an increase in the outer diameter of the body of the hair dryer that it is not possible to hold it by its body with one hand during the making of a hairstyle.
  • the document JP 60021705 A discloses a hair dryer according to the preamble of claim 1.
  • the implementation of the central core with its concave and converging peripheral surface makes it possible to define an angled suction duct which rectifies the flow of air to the extent that at the outlet the air flow is substantially parallel to the longitudinal axis. ⁇ of the tubular body while at the inlet the air flow forms a non-zero angle with the longitudinal axis ⁇ of the tubular body.
  • the use of the annular fin makes it possible to obtain, in the suction duct, a laminar displacement of the sucked air, which contributes to increasing the performance of the hair dryer by reducing the pressure losses by upstream of the working chamber.
  • the implementation of the central core associated with the peripheral air inlet allows to release the rear face of the hair dryer which can then be used to place gripping means or fixing.
  • the suction of the air does not intervene at the level of the rear face of the hair dryer, it is possible to fix the hair dryer to a wall with its backside close to the wall without risk of degradation of the performance of the hair dryer.
  • the configuration of the air flow of the hair dryer according to the invention is particularly suitable for so-called large diameter hair dryers.
  • the smallest dimension of the output section is greater than or equal to 80 mm.
  • the output section may be in the form of a disk whose diameter is greater than or equal to 80 mm.
  • the configuration of the aeraulic circuit of the hair dryer according to the invention is also particularly suitable for so-called compact hair dryers whose length and outside diameter have close values.
  • the tubular body has a length, measured parallel to the longitudinal axis ⁇ between the outlet and a rear end of the core, which is less than or equal to 1.5 times the largest outside diameter of the tubular body.
  • the largest outside diameter of the tubular body is between 100 mm and 250 mm.
  • the core comprises, opposite the outlet, a planar or convex back.
  • the electric motor is located inside the core.
  • the motor-fan can be of any suitable nature, for example a centrifugal fan motor.
  • the rotor comprises at least one axial fan propeller. The implementation of such an axial fan makes it possible to produce a compact fan inasmuch as the working chamber can have a small axial length.
  • the hair dryer can be equipped or associated with different types of gripping means and / or wall brackets or table.
  • the hair dryer comprises gripping means comprising a palmar support surface for at least a portion of the palmar surface of a hand and a counter surface. -support on at least part of the back of the hand.
  • gripping means comprising a palmar support surface for at least a portion of the palmar surface of a hand and a counter surface. -support on at least part of the back of the hand.
  • the gripping means are adapted so that the bearing surface is located opposite the outlet relative to the tubular body.
  • this configuration is particularly suitable for a user drying the hair of another person.
  • the gripping means are movable between a first position in which the palmar bearing surface is located opposite the outlet relative to the tubular body and a second position in which the bearing surface is located on the side of the tubular body.
  • this configuration is particularly suitable for a drying user himself insofar as the user can choose the most appropriate grip configuration depending on the hairstyle that he realizes, from the area of his hair during drying or from his position.
  • the gripping means comprise a plate whose upper face forms the palmar surface and a hoop which is secured to the plate and which delimits with the plate a space for the passage of part of the hand, the face of the arch oriented towards the plate forming the counter-support surface.
  • the plate is fixed on the tubular body by at least one arm which is connected to the tubular body by a pivot link axis perpendicular to the longitudinal axis ⁇ .
  • the hair dryer according to the invention has, at equivalent or higher performance, a lower noise than that of hair dryers according to the prior art.
  • a hair dryer as illustrated in FIG. figure 1 and generally designated by reference 1, comprises a tubular body 2 substantially symmetrical in revolution along a longitudinal axis ⁇ , except for the gripping means 3 which are located at the rear as will be described later.
  • the tubular body 2 can be formed in several pieces and, for example, in the form of two half-shells made of plastics material assembled along an axial plane and supplemented by inserts, especially with regard to the gripping means 3.
  • the tubular body 2 comprises, at the front, an open end 4 of the air outlet.
  • the outlet 4 has a substantially circular shape, it being understood that the air outlet 4 could also have an ellipse shape or an oblong shape.
  • the outlet 4 is equipped with a removable nozzle 5, not shown in FIG. figure 2 , to give the air flows an elliptical shape or oblong.
  • the tubular body 2 further comprises near a rear end 6, opposite the outlet 4, a peripheral air inlet 7 which extends over the entire periphery of the body 2.
  • the hair dryer 1 comprises a motorcycle fan unit 10 disposed in the tubular body 2 between the inlet 7 and the outlet 4.
  • the motorcycle fan unit 10 comprises a rotor 11 which is located in a working chamber 12 connected, on the one hand, to the air inlet 7 by a suction duct 13 and, on the other hand, to the outlet of the air 4 via a duct 14.
  • the rotor 11 is integral with the drive shaft 15 of an electric motor 16 whose axis of rotation is coaxial with the longitudinal axis ⁇ of the tubular body 2.
  • the rotor 11 is formed by an axial fan propeller sucking and blowing the air in a direction parallel to the longitudinal axis ⁇ of the tubular body.
  • the suction duct 13 must straighten the intake air flow, from a substantially radial direction at the inlet 7, to give it a forward axial orientation to reach the working chamber 12.
  • the hair dryer 1 comprises, at the rear of the tubular body 2, a central core 20 comprising a peripheral surface 21 which is concave and converges towards the working chamber 12.
  • the central core 20 has a substantially symmetrical shape of revolution of longitudinal axis ⁇ of the tubular body and the peripheral surface 21 corresponds, according to the illustrated example, to a portion of the surface of a torus of longitudinal axis ⁇ of the tubular body .
  • the central core 20 contributes to imparting, by its peripheral surface 21 and with the tubular body 2, an annular shape to the suction duct 13.
  • the core 20 is hollow and encloses in its central part the motor electric 16.
  • the hair dryer comprises at least one and, according to the example shown, two annular curved fins 22 and 23.
  • Each curved fin 22 and 23 comprises, on the one hand, a concave intrados 24 oriented towards the tubular body 2 and, on the other hand, a convex extrados 25 oriented towards the core 20.
  • the intrados 24 and the extrados 25 of each fin both converge towards the working chamber 12.
  • the curved fins 22 and 23 are kept at a distance from each other and connected to the core 20 and the tubular body 2 by four radial spacers 26, only three of which are visible at the figure 1 .
  • the implementation of the curved vanes 22 and 23 allows, with conformation of the peripheral surface and identical rotation speed, an increase in efficiency of 30% compared to a configuration without fins.
  • the upstream portion 30 of the peripheral surface 21 of the central core 20, that is to say the portion of the peripheral surface 21 located in the immediate vicinity of the inlet of air 7, is preferably tangential to a plane perpendicular to the longitudinal axis ⁇ of the tubular body.
  • the downstream portion of the peripheral surface 21, that is to say the portion of the peripheral surface 21 located in the immediate vicinity of the working chamber 12, is tangential to a cylinder of revolution of axis ⁇ .
  • the upstream portion 32 of the intrados and extrados of each fin is tangent with a cone of revolution of axis ⁇ which converges towards the working chamber 12 and whose angle at the top ⁇ is obtuse.
  • the downstream portion 33 of the intrados and extrados of each fin is, in turn, tangent with a cylinder C of revolution longitudinal axis ⁇ of the tubular body.
  • the peripheral edge 35 of the tubular body 2, which contributes to delimiting the air inlet 7, is also curved towards the outside of so that its inner face is convex and substantially parallel to the intrados of the fin 23 opposite.
  • the hair dryer 1 further comprises, downstream of the motorcycle fan unit 10 means 36 for electric heating of the blown air.
  • the heating means 36 are located in the blowing chamber 14 and can be made in any suitable manner and, for example, in the form of an electric heating resistance held by radial fins made of insulating materials such as for example sheets of mica.
  • the configuration of the hair dryer according to the invention is particularly suitable for producing a compact hair dryer of large diameter.
  • compact hairdryer it is to be understood a hair dryer whose length L, measured parallel to the longitudinal axis ⁇ of the tubular body, between the outlet 4 and a rear end 6 of the core, is less than or equal to 1.5 times the largest outer diameter D of the tubular body and preferably substantially equal to this diameter D.
  • large diameter hair dryer it is to be understood a hair dryer whose smallest dimension of the d section. output is greater than or equal to 80 mm. In the case of a circular outlet section the diameter d of the latter will be greater than or equal to 80 mm.
  • the largest outside diameter D of a For example, a hair dryer with a large diameter may be between 100 mm and 250 mm.
  • This hair dryer with a turbine whose diameter is 113mm and with a rotation speed of the order of 4500 rpm provides a flow rate of 120 m 3 / h with a reduced noise level of 15 dBA (80 at 65 dBA) compared to a conventional hair dryer having a maximum diameter of the order of 85 mm, and a rotation speed of the order of 7500 rpm for a flow rate of the order of 70 m 3 / h.
  • the configuration of the hair dryer according to the invention in particular its compactness as well as the presence of the central core 20 makes it possible to envisage a new embodiment of the gripping means 3.
  • the rear face of the core 20, which does not perform any aeraulic function can be closed by a back 40, flat or convex back located opposite the output 4, this region can be used to dispose the gripping means 3.
  • the gripping means 3 comprise, on the one hand, a palmar bearing surface P here formed by the convex back 40.
  • the palmar support surface P is intended to provide support for at least part of the palmar face from a user's hand.
  • the gripping means 3 comprise, on the other hand, a counter-support surface 41 formed by the inner face of an arch 42 integral with the convex back 40. The counter-support surface 41 is then intended to bear against a part the back of the hand whose palmar face rests on the convex back 40.
  • the gripping means 3, thus formed, allow a new type of handling of the hair dryer according to the invention.
  • the hair dryer can be held with the hand substantially open engaged between the hoop 42 and the back 40 which allows a grip more relaxed than in the case where the hand is closed on a handle as is the case for a gun-type hair dryer according to the prior art.
  • the gripping means 3 have a fixed position situated opposite the outlet 4.
  • another configuration can be envisaged for the gripping means of a hair dryer according to the invention.
  • FIG. figure 3 illustrates an embodiment of the invention according to which the gripping means 3 are movable between, on the one hand, a first position A, illustrated in FIG. figure 3 , in which the palmar bearing surface P is situated opposite the outlet 4 and, secondly, a second position B, illustrated in FIG. figure 4 in which the palmar bearing surface P is located on the side of the tubular body 2.
  • the gripping means 3 comprise a plate 50 whose upper face forms the palmar support surface P.
  • the plate 50 is fixed to the tubular body 2 by two arms 51, only one of which is visible to the Figures 3 and 4 .
  • Each arm 51 then comprises a first end rigidly connected to the plate 50 and, on the opposite side of the plate, a second end which is connected to the tubular body 2 by a pivot connection of axis ⁇ perpendicular to the longitudinal axis ⁇ of the
  • the plate 50 is movable in a 90 ° rotation between its first A and second B positions.
  • the hair dryer may then comprise means for locking the rotation of the arms 51 in order to immobilize the plate 50 in one or other of these two positions A or B.
  • the gripping means 3 further comprise a hoop 52 which is integral with the plate 50 and which together define a space 53 for the passage of part of the hand of a user.
  • the inner face of the arch 52 then forms the counter-support surface intended to bear against the back of the hand of a user as described above.
  • the longitudinal axis of the hoop 52 is substantially parallel to the axis of rotation ⁇ of the plate 50.
  • the longitudinal axis of the arch 52 may be placed so as to be perpendicular to the axis of rotation ⁇ .
  • the longitudinal axis of the arch 52 will be parallel to the longitudinal axis ⁇ of the tubular body when the plate 50 is in its second position B.
  • the hair dryer 1, according to the invention, thus constituted operates at equivalent drying performance, emitting less noise than hair dryers according to the previous.

Description

La présente invention concerne le domaine technique des sèche-cheveux et, plus particulièrement, des sèche-cheveux électriques à main utilisés par les professionnels et/ou les particuliers.The present invention relates to the technical field of hair dryers and, more particularly, electric hand-held hairdryers used by professionals and / or individuals.

Un sèche-cheveux à main comprend généralement un corps tubulaire allongé qui contient un groupe moto-ventilateur formé d'une hélice solidaire de l'arbre d'entraînement d'un moteur électrique. Le moteur électrique est maintenu dans le corps tubulaire par des bras rigides qui assurent le centrage de l'hélice par rapport à la paroi interne du corps tubulaire. Le plus souvent le corps tubulaire est équipé d'une poignée comprenant un cordon de raccordement au réseau électrique ainsi que des organes de commande du fonctionnement du moteur électrique. Pendant le fonctionnement du sèche-cheveux, le groupe moto ventilateur aspire de l'air par une entrée située à l'arrière du corps tubulaire pour le refouler par une sortie située à l'avant de ce dernier. Le sèche-cheveux comprend aussi, en aval de l'hélice, des moyens de chauffage électrique de l'air soufflé.A hand-held hairdryer generally comprises an elongated tubular body which contains a motor-fan unit formed of a propeller integral with the drive shaft of an electric motor. The electric motor is held in the tubular body by rigid arms which ensure the centering of the helix relative to the inner wall of the tubular body. Most often the tubular body is equipped with a handle comprising a connection cord to the electrical network and control members of the operation of the electric motor. During the operation of the hair dryer, the motorcycle fan unit draws air through an inlet located at the rear of the tubular body to push back through an outlet located at the front of the latter. The hair dryer also comprises, downstream of the propeller, means for electric heating of the blown air.

Un tel sèche-cheveux donne satisfaction en ce qui concerne sa fonction première de séchage des cheveux. Toutefois, les sèche-cheveux connus présentent l'inconvénient d'être particulièrement bruyants ce qui induit une fatigue lors de leur usage prolongé par un professionnel ou encore une nuisance pour l'utilisateur et son entourage.Such a hair dryer gives satisfaction with regard to its primary function of drying hair. However, known hairdryers have the disadvantage of being particularly noisy which induces fatigue during their prolonged use by a professional or a nuisance for the user and those around him.

Il est donc apparu le besoin d'un nouveau type de sèche-cheveux qui possède des performances de chauffage et de débit d'air analogues à celles des sèche-cheveux selon l'art antérieur tout en induisant une nuisance sonore moindre.It has therefore emerged the need for a new type of hair dryer which has heating and air flow performance similar to that of hair dryers according to the prior art while inducing a lower noise.

Cette nuisance sonore résulte notamment de la vitesse de rotation du moteur qui est généralement comprise entre 7000 et 16000 tr/min. Une voie de limitation de la nuisance sonore réside dans la réduction de la vitesse de rotation du moteur. Toutefois, si la vitesse de rotation est réduite, il devient nécessaire, pour conserver un débit d'air satisfaisant, d'augmenter le diamètre de l'hélice. Or, une telle augmentation du diamètre de l'hélice modifie les proportions du sèche-cheveux qui peut s'avérer difficile à manipuler s'il possède une configuration habituelle de type pistolet avec une poignée s'étendant perpendiculairement à l'axe de soufflage du sèche-cheveux. De plus, l'augmentation du diamètre de l'hélice induit une telle augmentation du diamètre extérieur du corps du sèche-cheveux qu'il n'est pas possible de le tenir par son corps d'une seule main pendant la réalisation d'une coiffure.This noise nuisance results in particular from the speed of rotation of the engine which is generally between 7000 and 16000 rpm. One way to limit noise pollution is to reduce the speed of rotation of the motor. However, if the speed of rotation is reduced, it becomes necessary, to maintain a satisfactory air flow, to increase the diameter of the propeller. However, such an increase in the diameter of the helix modifies the proportions of the hair dryer which can be difficult to handle if it has a typical configuration of the pistol type with a handle extending perpendicular to the blowing axis of the hair dryer. In addition, increasing the diameter of the helix induces such an increase in the outer diameter of the body of the hair dryer that it is not possible to hold it by its body with one hand during the making of a hairstyle.

Il est donc apparu le besoin d'un nouveau type de sèche-cheveux dont la configuration du circuit aéraulique permet, notamment, d'envisager des modes de préhension différents de ceux des sèche-cheveux selon l'art antérieur et/ou d'obtenir une certaine compacité avec des performances aérauliques et sonores satisfaisantes voire meilleures que celles des sèche-cheveux selon l'art antérieur.It has therefore appeared the need for a new type of hair dryer whose configuration of the air flow circuit makes it possible, in particular, to envisage different gripping modes from those of hair dryers according to the prior art and / or to obtain a certain compactness with aeraulic and sound performance satisfactory or even better than those of hair dryers according to the prior art.

Le document JP 60021705 A divulgue un sèche-cheveux selon le préambule de la revendication 1.The document JP 60021705 A discloses a hair dryer according to the preamble of claim 1.

Afin d'atteindre cet objectif l'invention concerne un sèche-cheveux comprenant :

  • un corps tubulaire d'axe longitudinal Δ qui est ouvert à une extrémité avant dite de sortie et qui comprend, à proximité d'une extrémité arrière opposée à la sortie, une entrée d'air sensiblement périphérique,
  • un groupe moto-ventilateur qui est disposé dans le corps tubulaire entre l'entrée et la sortie et qui comprend un moteur électrique entrainant en rotation, selon un axe parallèle ou confondu avec l'axe longitudinal Δ du corps tubulaire, un rotor situé dans une chambre de travail et adapté pour aspirer l'air par l'entrée et le refouler par la sortie,
  • à l'arrière du corps tubulaire, un noyau central d'axe longitudinal Δ comprenant une surface périphérique qui est concave et converge vers la chambre de travail et qui délimite, avec le corps tubulaire, l'entrée d'air et un conduit d'aspiration de forme annulaire,
    Selon l'invention, ce sèche-cheveux comprend:
  • dans le conduit d'aspiration, au moins une ailette incurvée annulaire d'axe longitudinal Δ dont l'intrados et l'extrados convergent vers la chambre de travail.
In order to achieve this objective the invention relates to a hair dryer comprising:
  • a tubular body of longitudinal axis Δ which is open at a said front end of output and which comprises, near a rear end opposite the outlet, a substantially peripheral air inlet,
  • a motor-fan unit which is arranged in the tubular body between the inlet and the outlet and which comprises an electric motor driving in rotation, along an axis parallel to or coincident with the longitudinal axis Δ of the tubular body, a rotor located in a working room and adapted to suck air through the entrance and push back through the exit,
  • at the rear of the tubular body, a central core of longitudinal axis Δ comprising a peripheral surface which is concave and converges towards the working chamber and which delimits, with the tubular body, the air inlet and a duct of annular suction,
    According to the invention, this hair dryer comprises:
  • in the suction duct, at least one annular curved fin of longitudinal axis Δ whose intrados and extrados converge towards the working chamber.

La mise en oeuvre du noyau central avec sa surface périphérique concave et convergente permet de définir un conduit d'aspiration coudé qui redresse le flux d'air dans la mesure où à la sortie le flux d'air est sensiblement parallèle à l'axe longitudinal Δ du corps tubulaire alors qu'en entrée le flux d'air forme un angle non nul avec l'axe longitudinal Δ du corps tubulaire. De plus, la mise en oeuvre de l'ailette annulaire permet d'obtenir, dans le conduit d'aspiration, un déplacement laminaire de l'air aspiré ce qui contribue à augmenter les performances du sèche-cheveux en réduisant les pertes de charge en amont de la chambre de travail.The implementation of the central core with its concave and converging peripheral surface makes it possible to define an angled suction duct which rectifies the flow of air to the extent that at the outlet the air flow is substantially parallel to the longitudinal axis. Δ of the tubular body while at the inlet the air flow forms a non-zero angle with the longitudinal axis Δ of the tubular body. In addition, the use of the annular fin makes it possible to obtain, in the suction duct, a laminar displacement of the sucked air, which contributes to increasing the performance of the hair dryer by reducing the pressure losses by upstream of the working chamber.

Par ailleurs, la mise en oeuvre du noyau central associé à l'entrée d'air périphérique permet de libérer la face arrière du sèche-cheveux qui peut alors être mise à profit pour y placer des moyens de préhension ou de fixation. De même dans la mesure où l'aspiration de l'air n'intervient pas au niveau de la face arrière du sèche-cheveux, il est possible de fixer le sèche-cheveux à un mur avec sa face arrière proche du mur sans risque de dégradation des performances du sèche-cheveux.Furthermore, the implementation of the central core associated with the peripheral air inlet allows to release the rear face of the hair dryer which can then be used to place gripping means or fixing. In the same way, since the suction of the air does not intervene at the level of the rear face of the hair dryer, it is possible to fix the hair dryer to a wall with its backside close to the wall without risk of degradation of the performance of the hair dryer.

La configuration du circuit aéraulique du sèche-cheveux selon l'invention est particulièrement adaptée pour des sèche-cheveux dits de grand diamètre. Ainsi, selon une caractéristique de l'invention, la plus petite dimension de la section de sortie est supérieure ou égale à 80 mm. Dans le cadre de cette caractéristique, la section de sortie peut présenter la forme d'un disque dont le diamètre est supérieur ou égal à 80 mm.The configuration of the air flow of the hair dryer according to the invention is particularly suitable for so-called large diameter hair dryers. Thus, according to one characteristic of the invention, the smallest dimension of the output section is greater than or equal to 80 mm. As part of this feature, the output section may be in the form of a disk whose diameter is greater than or equal to 80 mm.

La configuration du circuit aéraulique du sèche-cheveux selon l'invention est également particulièrement adaptée pour des sèche-cheveux dits compacts dont la longueur et le diamètre extérieur possèdent des valeurs proches. Ainsi selon une caractéristique de l'invention, le corps tubulaire possède une longueur, mesurée parallèlement à l'axe longitudinal Δ entre la sortie et une extrémité arrière du noyau, qui est inférieure ou égale à 1,5 fois le plus grand diamètre extérieur du corps tubulaire.The configuration of the aeraulic circuit of the hair dryer according to the invention is also particularly suitable for so-called compact hair dryers whose length and outside diameter have close values. Thus according to one characteristic of the invention, the tubular body has a length, measured parallel to the longitudinal axis Δ between the outlet and a rear end of the core, which is less than or equal to 1.5 times the largest outside diameter of the tubular body.

Selon une variante de cette caractéristique, le plus grand diamètre extérieur du corps tubulaire est compris entre 100 mm et 250 mm.According to a variant of this characteristic, the largest outside diameter of the tubular body is between 100 mm and 250 mm.

Selon une autre caractéristique de l'invention, le noyau comprend, à l'opposé de la sortie, un dos de forme plane ou convexe.According to another characteristic of the invention, the core comprises, opposite the outlet, a planar or convex back.

Selon une forme de réalisation de l'invention visant à assurer un écoulement de l'air dans le conduit d'aspiration aussi laminaire que possible :

  • la partie amont de la surface périphérique du noyau central, qui est située à proximité immédiate de l'entrée d'air, est tangente soit à un plan perpendiculaire à l'axe longitudinal Δ du corps tubulaire, soit à un cône de révolution d'axe longitudinal Δ du corps tubulaire qui converge vers la chambre de travail et dont l'angle au sommet est obtus,
  • la partie aval de la surface périphérique du noyau central, qui est située à proximité immédiate de la chambre de travail, est tangente à un cylindre de révolution d'axe longitudinal Δ du corps tubulaire.
According to one embodiment of the invention for ensuring a flow of air in the suction duct as laminar as possible:
  • the upstream portion of the peripheral surface of the central core, which is situated in the immediate vicinity of the air inlet, is tangential to either a plane perpendicular to the longitudinal axis Δ of the tubular body, or to a cone of revolution of longitudinal axis Δ of the tubular body which converges towards the working chamber and whose apex angle is obtuse,
  • the downstream part of the peripheral surface of the central core, which is situated in the immediate vicinity of the working chamber, is tangential to a cylinder of revolution of longitudinal axis Δ of the tubular body.

Dans le même sens et selon une autre forme de réalisation de l'invention :

  • la partie amont de l'intrados et l'extrados de chaque ailette est tangente à un cône de révolution d'axe longitudinal Δ du corps tubulaire qui converge vers la chambre de travail et dont l'angle au sommet est obtus,
  • la partie aval de l'intrados et l'extrados de chaque ailette est tangente à un cylindre de révolution d'axe longitudinal Δ du corps tubulaire.
In the same sense and according to another embodiment of the invention:
  • the upstream portion of the intrados and the extrados of each fin is tangent to a cone of revolution of longitudinal axis Δ of the tubular body which converges towards the working chamber and whose apex angle is obtuse,
  • the downstream part of the intrados and the extrados of each fin is tangent to a cylinder of revolution of longitudinal axis Δ of the tubular body.

Selon l'invention différentes implantations sont envisageables pour le moteur électrique. Ainsi, selon une caractéristique de l'invention le moteur électrique est situé à l'intérieur du noyau.According to the invention different implantations are possible for the electric motor. Thus, according to one characteristic of the invention, the electric motor is located inside the core.

Selon l'invention le moto-ventilateur peut être de toute nature appropriée, par exemple un moto-ventilateur centrifuge. Dans une forme préférée mais non exclusive de réalisation, le rotor comprend au moins une hélice de ventilateur axial. La mise en oeuvre d'un tel ventilateur axial permet de réaliser un ventilateur compact dans la mesure où la chambre de travail peut présenter une faible longueur axiale.According to the invention the motor-fan can be of any suitable nature, for example a centrifugal fan motor. In a preferred but non-exclusive embodiment, the rotor comprises at least one axial fan propeller. The implementation of such an axial fan makes it possible to produce a compact fan inasmuch as the working chamber can have a small axial length.

Selon l'invention le sèche-cheveux peut être équipé ou associé à différents types de moyens de préhension et/ou de supports muraux ou de table.According to the invention the hair dryer can be equipped or associated with different types of gripping means and / or wall brackets or table.

Selon une forme, préférée mais non exclusive, de réalisation de l'invention, le sèche-cheveux comprend des moyens de préhension comprenant une surface d'appui palmaire pour une partie au moins de la face palmaire d'une main et une surface de contre-appui sur une partie au moins du dos de la main. Un tel mode de réalisation des moyens de préhension permet un maintien fiable du sèche-cheveux d'une seule main sans qu'il soit nécessaire de serrer ladite main ce qui contribue au confort d'utilisation du sèche-cheveux.According to a preferred but non-exclusive embodiment of the invention, the hair dryer comprises gripping means comprising a palmar support surface for at least a portion of the palmar surface of a hand and a counter surface. -support on at least part of the back of the hand. Such an embodiment of the gripping means allows a reliable holding of the hair dryer with one hand without the need to tighten said hand which contributes to the comfort of use of the hair dryer.

Selon une variante de la forme préférée de réalisation, les moyens de préhension sont adaptés pour que la surface d'appui soit située à l'opposé de la sortie par rapport au corps tubulaire. Dans le cas d'un sèche-cheveux compact et de grand diamètre, cette configuration est particulièrement adaptée pour un utilisateur séchant les cheveux d'une autre personne.According to a variant of the preferred embodiment, the gripping means are adapted so that the bearing surface is located opposite the outlet relative to the tubular body. In the case of a compact and large diameter hair dryer, this configuration is particularly suitable for a user drying the hair of another person.

Selon une autre variante de la forme préférée de réalisation, les moyens de préhension sont mobiles entre une première position dans laquelle la surface d'appui palmaire est située à l'opposé de la sortie par rapport au corps tubulaire et une deuxième position dans laquelle la surface d'appui est située sur le coté du corps tubulaire. Dans le cas d'un sèche-cheveux compact et de grand diamètre, cette configuration est particulièrement adaptée pour un utilisateur séchant lui-même dans la mesure où l'utilisateur peut choisir la configuration de préhension la plus adaptée en fonction de la coiffure qu'il réalise, de la zone de sa chevelure en cours de séchage ou encore de sa position.According to another variant of the preferred embodiment, the gripping means are movable between a first position in which the palmar bearing surface is located opposite the outlet relative to the tubular body and a second position in which the bearing surface is located on the side of the tubular body. In the case of a compact hair dryer and large diameter, this configuration is particularly suitable for a drying user himself insofar as the user can choose the most appropriate grip configuration depending on the hairstyle that he realizes, from the area of his hair during drying or from his position.

Selon une caractéristique de la forme préférée de réalisation du sèche-cheveux, les moyens de préhension comprennent un plateau dont la face supérieure forme la surface palmaire et un arceau qui est solidaire du plateau et qui délimite avec le plateau un espace pour le passage d'une partie de la main, la face de l'arceau orientée vers le plateau formant la surface de contre-appui.According to one characteristic of the preferred embodiment of the hair dryer, the gripping means comprise a plate whose upper face forms the palmar surface and a hoop which is secured to the plate and which delimits with the plate a space for the passage of part of the hand, the face of the arch oriented towards the plate forming the counter-support surface.

Selon une variante de cette caractéristique, le plateau est fixé sur le corps tubulaire par au moins un bras qui est lié au corps tubulaire par une liaison pivot d'axe perpendiculaire à l'axe longitudinal Δ.According to a variant of this characteristic, the plate is fixed on the tubular body by at least one arm which is connected to the tubular body by a pivot link axis perpendicular to the longitudinal axis Δ.

Le sèche-cheveux selon l'invention présente, à performances équivalentes voire supérieures, une nuisance sonore inférieure à celle des sèche-cheveux selon l'art antérieur.The hair dryer according to the invention has, at equivalent or higher performance, a lower noise than that of hair dryers according to the prior art.

Par ailleurs diverses autres caractéristiques de l'invention ressortent de la description détaillée, ci-dessous, effectuée en référence aux dessins annexés qui illustrent une forme de réalisation d'un sèche-cheveux selon l'invention :

  • La figure 1 est une perspective schématique d'un sèche-cheveux selon l'invention dont la sortie est équipée d'une buse de séchage.
  • La figure 2 est une perspective schématique arrachée selon un plan axial du sèche-cheveux illustré à la figure 1 sans buse de séchage.
  • Les figures 3 et 4 sont des perspectives schématiques montrant une autre forme de réalisation d'un sèche-cheveux selon l'invention comprenant des moyens de préhension mobiles.
Furthermore, various other features of the invention will emerge from the detailed description, given below, with reference to the appended drawings which illustrate an embodiment of a hair dryer according to the invention:
  • The figure 1 is a schematic perspective of a hair dryer according to the invention whose output is equipped with a drying nozzle.
  • The figure 2 is a schematic perspective torn along an axial plane of the hair dryer illustrated in figure 1 without drying nozzle.
  • The Figures 3 and 4 are schematic perspectives showing another embodiment of a hair dryer according to the invention comprising movable gripping means.

Un sèche-cheveux, selon l'invention, tel qu'illustré à la figure 1 et désigné dans son ensemble par la référence 1, comprend un corps tubulaire 2 sensiblement symétrique de révolution selon un axe longitudinal Δ, sauf pour ce qui concerne les moyens de préhension 3 qui sont situés à l'arrière comme cela sera décrit par la suite. Le corps tubulaire 2 peut être formé en plusieurs morceaux et, par exemple, réalisé sous la forme de deux demi-coques en matière plastique assemblées selon un plan axial et complétées par des pièces rapportées notamment pour ce qui concerne les moyens de préhension 3.A hair dryer, according to the invention, as illustrated in FIG. figure 1 and generally designated by reference 1, comprises a tubular body 2 substantially symmetrical in revolution along a longitudinal axis Δ, except for the gripping means 3 which are located at the rear as will be described later. The tubular body 2 can be formed in several pieces and, for example, in the form of two half-shells made of plastics material assembled along an axial plane and supplemented by inserts, especially with regard to the gripping means 3.

Comme le montre la figure 2, le corps tubulaire 2 comprend, à l'avant, une extrémité ouverte 4 de sortie de l'air. La sortie 4 possède une forme sensiblement circulaire étant entendu que la sortie d'air 4 pourrait également présenter une forme d'ellipse ou une forme oblongue. Selon l'exemple illustré à la figure 1, la sortie 4 est équipée d'une buse amovible 5, non représentée à la figure 2, permettant de conférer aux flux d'air une forme elliptique ou oblongue. Le corps tubulaire 2 comprend en outre à proximité d'une extrémité arrière 6, opposée à la sortie 4, une entrée d'air périphérique 7 qui s'étend sur tout le pourtour du corps 2.As shown in figure 2 , the tubular body 2 comprises, at the front, an open end 4 of the air outlet. The outlet 4 has a substantially circular shape, it being understood that the air outlet 4 could also have an ellipse shape or an oblong shape. According to the example shown in figure 1 , the outlet 4 is equipped with a removable nozzle 5, not shown in FIG. figure 2 , to give the air flows an elliptical shape or oblong. The tubular body 2 further comprises near a rear end 6, opposite the outlet 4, a peripheral air inlet 7 which extends over the entire periphery of the body 2.

Afin d'assurer un soufflage d'air par la sortie 4, le sèche-cheveux 1 comprend un groupe moto ventilateur 10 disposé dans le corps tubulaire 2 entre l'entrée 7 et la sortie 4. Le groupe moto ventilateur 10 comprend un rotor 11 qui est situé dans une chambre de travail 12 raccordée, d'une part, à l'entrée d'air 7 par un conduit d'aspiration 13 et, d'autre part, à la sortie de l'air 4 par un conduit de soufflage 14. Le rotor 11 est solidaire de l'arbre d'entraînement 15 d'un moteur électrique 16 dont l'axe de rotation est coaxial à l'axe longitudinal Δ du corps tubulaire 2.In order to ensure air blowing through the outlet 4, the hair dryer 1 comprises a motorcycle fan unit 10 disposed in the tubular body 2 between the inlet 7 and the outlet 4. The motorcycle fan unit 10 comprises a rotor 11 which is located in a working chamber 12 connected, on the one hand, to the air inlet 7 by a suction duct 13 and, on the other hand, to the outlet of the air 4 via a duct 14. The rotor 11 is integral with the drive shaft 15 of an electric motor 16 whose axis of rotation is coaxial with the longitudinal axis Δ of the tubular body 2.

Selon l'exemple illustré, le rotor 11 est formé par une hélice de ventilateur axial aspirant et soufflant l'air selon une direction parallèle à l'axe longitudinal Δ du corps tubulaire.According to the illustrated example, the rotor 11 is formed by an axial fan propeller sucking and blowing the air in a direction parallel to the longitudinal axis Δ of the tubular body.

Ainsi, conformément à une caractéristique essentielle de l'invention, le conduit d'aspiration 13 doit redresser le flux d'air aspiré pour, à partir d'une direction sensiblement radiale au niveau de l'entrée 7, lui conférer une orientation axiale avant d'atteindre la chambre de travail 12. À cet effet, le sèche-cheveux 1 comprend, à l'arrière du corps tubulaire 2, un noyau central 20 comprenant une surface périphérique 21 qui est concave et converge vers la chambre de travail 12. Le noyau central 20 possède une forme sensiblement symétrique de révolution d'axe longitudinal Δ du corps tubulaire et la surface périphérique 21 correspond, selon l'exemple illustré, à une portion de la surface d'un tore d'axe longitudinal Δ du corps tubulaire. Ainsi, le noyau central 20 contribue à conférer, par sa surface périphérique 21 et avec le corps tubulaire 2, une forme annulaire au conduit d'aspiration 13. Selon l'exemple illustré le noyau 20 est creux et renferme dans sa partie centrale le moteur électrique 16.Thus, according to an essential characteristic of the invention, the suction duct 13 must straighten the intake air flow, from a substantially radial direction at the inlet 7, to give it a forward axial orientation to reach the working chamber 12. For this purpose, the hair dryer 1 comprises, at the rear of the tubular body 2, a central core 20 comprising a peripheral surface 21 which is concave and converges towards the working chamber 12. The central core 20 has a substantially symmetrical shape of revolution of longitudinal axis Δ of the tubular body and the peripheral surface 21 corresponds, according to the illustrated example, to a portion of the surface of a torus of longitudinal axis Δ of the tubular body . Thus, the central core 20 contributes to imparting, by its peripheral surface 21 and with the tubular body 2, an annular shape to the suction duct 13. According to the illustrated example, the core 20 is hollow and encloses in its central part the motor electric 16.

Afin de conférer à l'air aspiré un écoulement aussi laminaire que possible dans le conduit d'aspiration 13, le sèche-cheveux comprend au moins une et, selon l'exemple illustré, deux ailettes incurvées annulaires 22 et 23. Chaque ailette incurvée 22 et 23 comprend, d'une part, un intrados 24 concave et orienté vers le corps tubulaire 2 et, d'autre part, un extrados 25 convexe et orienté vers le noyau 20. L'intrados 24 et l'extrados 25 de chaque ailette convergent tous deux vers la chambre de travail 12. Les ailettes incurvées 22 et 23 sont maintenues à distance l'une de l'autre et liées au noyau 20 ainsi qu'au corps tubulaire 2 par quatre entretoises radiales 26 dont trois seulement sont visibles à la figure 1.In order to give the suction air a flow as laminar as possible in the suction duct 13, the hair dryer comprises at least one and, according to the example shown, two annular curved fins 22 and 23. Each curved fin 22 and 23 comprises, on the one hand, a concave intrados 24 oriented towards the tubular body 2 and, on the other hand, a convex extrados 25 oriented towards the core 20. The intrados 24 and the extrados 25 of each fin both converge towards the working chamber 12. The curved fins 22 and 23 are kept at a distance from each other and connected to the core 20 and the tubular body 2 by four radial spacers 26, only three of which are visible at the figure 1 .

Il doit être remarqué que la mise en oeuvre des ailettes incurvées 22 et 23 permet, à conformation de la surface périphérique et vitesse de rotation identiques, une augmentation du rendement de 30 % par rapport à une configuration sans ailettes.It should be noted that the implementation of the curved vanes 22 and 23 allows, with conformation of the peripheral surface and identical rotation speed, an increase in efficiency of 30% compared to a configuration without fins.

Afin de contribuer à un bon guidage de l'air, la partie amont 30 de la surface périphérique 21 du noyau central 20, c'est-à-dire la partie de la surface périphérique 21 située à proximité immédiate de l'entrée d'air 7, est de préférence tangente avec un plan perpendiculaire à l'axe longitudinal Δ du corps tubulaire. Dans le même sens, la partie aval de la surface périphérique 21, c'est-à-dire la partie de la surface périphérique 21 située à proximité immédiate de la chambre de travail 12, est tangente à un cylindre de révolution d'axe Δ. Toujours dans le même sens, la partie amont 32 de l'intrados et de l'extrados de chaque ailette est tangente avec un cône de révolution d'axe Δ qui converge vers la chambre de travail 12 et dont l'angle au sommet α est obtus. La partie aval 33 de l'intrados et de l'extrados de chaque ailette est, quant à elle, tangente avec un cylindre de révolution C d'axe longitudinal Δ du corps tubulaire.In order to contribute to good air guidance, the upstream portion 30 of the peripheral surface 21 of the central core 20, that is to say the portion of the peripheral surface 21 located in the immediate vicinity of the inlet of air 7, is preferably tangential to a plane perpendicular to the longitudinal axis Δ of the tubular body. In the same direction, the downstream portion of the peripheral surface 21, that is to say the portion of the peripheral surface 21 located in the immediate vicinity of the working chamber 12, is tangential to a cylinder of revolution of axis Δ . Always in the same direction, the upstream portion 32 of the intrados and extrados of each fin is tangent with a cone of revolution of axis Δ which converges towards the working chamber 12 and whose angle at the top α is obtuse. The downstream portion 33 of the intrados and extrados of each fin is, in turn, tangent with a cylinder C of revolution longitudinal axis Δ of the tubular body.

Selon l'exemple illustré et toujours en vue d'optimiser l'écoulement de l'air aspiré, le bord périphérique 35 du corps tubulaire 2, qui contribue à délimiter l'entrée d'air 7, est également incurvé vers l'extérieur de sorte que sa face interne est convexe et sensiblement parallèle à l'intrados de l'ailette 23 en regard.According to the illustrated example and always with a view to optimizing the flow of the sucked air, the peripheral edge 35 of the tubular body 2, which contributes to delimiting the air inlet 7, is also curved towards the outside of so that its inner face is convex and substantially parallel to the intrados of the fin 23 opposite.

Le sèche-cheveux 1 comprend, en outre, en aval du groupe moto ventilateur 10 des moyens 36 de chauffage électrique de l'air soufflé. Les moyens de chauffage 36 sont situés dans la chambre de soufflage 14 et peuvent être réalisés de toute façon appropriée et, par exemple, sous la forme d'une résistance électrique chauffante maintenue par des ailettes radiales réalisées en matériaux isolants tels que par exemple des feuilles de mica.The hair dryer 1 further comprises, downstream of the motorcycle fan unit 10 means 36 for electric heating of the blown air. The heating means 36 are located in the blowing chamber 14 and can be made in any suitable manner and, for example, in the form of an electric heating resistance held by radial fins made of insulating materials such as for example sheets of mica.

La configuration du sèche-cheveux selon l'invention, avec le noyau central 20 et les ailettes incurvées permettant un redressement de l'air aspiré depuis une orientation sensiblement radiale pour lui conférer une direction sensiblement axiale, est particulièrement adaptée à la réalisation d'un sèche-cheveux compact de grand diamètre. Par sèche-cheveux compact, il convient d'entendre un sèche-cheveux dont la longueur L, mesurée, parallèlement à l'axe longitudinal Δ du corps tubulaire, entre la sortie 4 et une extrémité arrière 6 du noyau, est inférieure ou égal à 1,5 fois le plus grand diamètre extérieur D du corps tubulaire et de préférence sensiblement égale à ce diamètre D. Par sèche-cheveux de grand diamètre, il convient d'entendre un sèche-cheveux dont la plus petite dimension d de la section de sortie est supérieure ou égale à 80 mm. Dans le cas d'une section de sortie circulaire le diamètre d de cette dernière sera supérieur ou égal à 80 mm. Le plus grand diamètre extérieur D d'un sèche-cheveux de grand diamètre pourra par exemple être compris entre 100 mm et 250 mm.The configuration of the hair dryer according to the invention, with the central core 20 and the curved fins allowing rectification of the air sucked from a substantially radial orientation to give it a substantially axial direction, is particularly suitable for producing a compact hair dryer of large diameter. By compact hairdryer, it is to be understood a hair dryer whose length L, measured parallel to the longitudinal axis Δ of the tubular body, between the outlet 4 and a rear end 6 of the core, is less than or equal to 1.5 times the largest outer diameter D of the tubular body and preferably substantially equal to this diameter D. By large diameter hair dryer, it is to be understood a hair dryer whose smallest dimension of the d section. output is greater than or equal to 80 mm. In the case of a circular outlet section the diameter d of the latter will be greater than or equal to 80 mm. The largest outside diameter D of a For example, a hair dryer with a large diameter may be between 100 mm and 250 mm.

Dans le cadre de l'invention il a été possible de réaliser un sèche-cheveux dont le plus grand diamètre D et la longueur L sont égaux et sensiblement égaux à 120 mm. Ce sèche-cheveux avec une turbine dont le diamètre vaut 113mm et avec une vitesse de rotation de l'ordre de 4500 tr/min permet d'obtenir un débit de 120 m3/h avec un niveau sonore abaissé de 15 dBA (de 80 à 65 dBA) par rapport à un sèche-cheveux classique ayant un diamètre maximal de l'ordre de 85 mm, et une vitesse de rotation de l'ordre de 7500 tr/min pour un débit de l'ordre de 70 m3/h.In the context of the invention it has been possible to produce a hair dryer whose largest diameter D and length L are equal to and substantially equal to 120 mm. This hair dryer with a turbine whose diameter is 113mm and with a rotation speed of the order of 4500 rpm provides a flow rate of 120 m 3 / h with a reduced noise level of 15 dBA (80 at 65 dBA) compared to a conventional hair dryer having a maximum diameter of the order of 85 mm, and a rotation speed of the order of 7500 rpm for a flow rate of the order of 70 m 3 / h.

La configuration du sèche-cheveux selon l'invention, notamment son caractère compact ainsi que la présence du noyau central 20 permet d'envisager un nouveau mode de réalisation des moyens de préhension 3. En effet, dans la mesure où la face arrière du noyau 20, qui ne remplit aucune fonction aéraulique, peut être fermée par un dos 40, dos de forme plane ou convexe situé à l'opposé de la sortie 4, cette région peut être mise à profit pour y disposer les moyens de préhension 3.The configuration of the hair dryer according to the invention, in particular its compactness as well as the presence of the central core 20 makes it possible to envisage a new embodiment of the gripping means 3. In fact, since the rear face of the core 20, which does not perform any aeraulic function, can be closed by a back 40, flat or convex back located opposite the output 4, this region can be used to dispose the gripping means 3.

Selon l'exemple illustré aux figures 1 et 2, les moyens de préhension 3 comprennent, d'une part, une surface d'appui palmaire P formée ici par le dos convexe 40. La surface d'appui palmaire P est destinée à offrir un appui pour une partie au moins de la face palmaire d'une main d'un utilisateur. Les moyens de préhension 3 comprennent, d'autre part, une surface de contre appui 41 formée par la face interne d'un arceau 42 solidaire du dos convexe 40. La surface de contre appui 41 est alors destinée à venir en appui sur une partie du dos de la main dont la face palmaire repose sur le dos convexe 40.According to the example shown in Figures 1 and 2 , the gripping means 3 comprise, on the one hand, a palmar bearing surface P here formed by the convex back 40. The palmar support surface P is intended to provide support for at least part of the palmar face from a user's hand. The gripping means 3 comprise, on the other hand, a counter-support surface 41 formed by the inner face of an arch 42 integral with the convex back 40. The counter-support surface 41 is then intended to bear against a part the back of the hand whose palmar face rests on the convex back 40.

Les moyens de préhension 3, ainsi constitués, permettent un nouveau type de prise en main du sèche-cheveux selon l'invention. En effet le sèche-cheveux peut-être tenu avec la main sensiblement ouverte engagée entre l'arceau 42 et le dos 40 ce qui permet une prise en main plus décontractée que dans le cas où la main est fermée sur une poignée comme cela est le cas pour un sèche-cheveux de type pistolet selon l'art antérieur.The gripping means 3, thus formed, allow a new type of handling of the hair dryer according to the invention. Indeed the hair dryer can be held with the hand substantially open engaged between the hoop 42 and the back 40 which allows a grip more relaxed than in the case where the hand is closed on a handle as is the case for a gun-type hair dryer according to the prior art.

Selon l'exemple illustré figures 1 et 2, les moyens de préhension 3 possèdent une position fixe située à l'opposé de la sortie 4. Toutefois, une autre configuration peut être envisagée pour les moyens de préhension d'un sèche-cheveux selon l'invention.According to the illustrated example Figures 1 and 2 , the gripping means 3 have a fixed position situated opposite the outlet 4. However, another configuration can be envisaged for the gripping means of a hair dryer according to the invention.

Ainsi les figures 3 et 4 illustrent une forme de réalisation de l'invention selon laquelle les moyens de préhension 3 sont mobiles entre, d'une part, une première position A, illustrée à la figure 3, dans laquelle la surface d'appui palmaire P est située à l'opposé de la sortie 4 et, d'autre part, une deuxième position B, illustrée à la figure 4, dans laquelle la surface d'appui palmaire P est située sur le côté du corps tubulaire 2.So the Figures 3 and 4 illustrate an embodiment of the invention according to which the gripping means 3 are movable between, on the one hand, a first position A, illustrated in FIG. figure 3 , in which the palmar bearing surface P is situated opposite the outlet 4 and, secondly, a second position B, illustrated in FIG. figure 4 in which the palmar bearing surface P is located on the side of the tubular body 2.

Selon cette forme de réalisation, les moyens de préhension 3 comprennent un plateau 50 dont la face supérieure forme la surface d'appui palmaire P. Le plateau 50 est fixé au corps tubulaire 2 par deux bras 51 dont un seul est visible aux figures 3 et 4. Chaque bras 51 comprend alors une première extrémité liée de manière rigide au plateau 50 et, à l'opposé, du plateau une deuxième extrémité qui est liée au corps tubulaire 2 par une liaison pivot d'axe Ω perpendiculaire à l'axe longitudinal Δ du corps tubulaire 2. Ainsi, le plateau 50 est mobile selon une rotation de 90° entre ses première A et deuxième B positions. Le sèche-cheveux peut alors comprendre des moyens de verrouillage de la rotation des bras 51 afin d'immobiliser le plateau 50 dans l'une ou l'autre de ces deux positions A ou B.According to this embodiment, the gripping means 3 comprise a plate 50 whose upper face forms the palmar support surface P. The plate 50 is fixed to the tubular body 2 by two arms 51, only one of which is visible to the Figures 3 and 4 . Each arm 51 then comprises a first end rigidly connected to the plate 50 and, on the opposite side of the plate, a second end which is connected to the tubular body 2 by a pivot connection of axis Ω perpendicular to the longitudinal axis Δ of the Thus, the plate 50 is movable in a 90 ° rotation between its first A and second B positions. The hair dryer may then comprise means for locking the rotation of the arms 51 in order to immobilize the plate 50 in one or other of these two positions A or B.

Les moyens de préhension 3 comprennent en outre un arceau 52 qui est solidaire du plateau 50 et qui délimitent ensemble un espace 53 pour le passage d'une partie de la main d'un utilisateur. La face interne de l'arceau 52 forme alors la surface de contre-appui destinée à venir en appui contre le dos de la main d'un utilisateur comme cela a été décrit précédemment.The gripping means 3 further comprise a hoop 52 which is integral with the plate 50 and which together define a space 53 for the passage of part of the hand of a user. The inner face of the arch 52 then forms the counter-support surface intended to bear against the back of the hand of a user as described above.

Il doit être remarqué que selon l'exemple illustré aux figures 3 et 4, l'axe longitudinal de l'arceau 52 est sensiblement parallèle à l'axe de rotation Ω du plateau 50. Toutefois, afin de faciliter la préhension du sèche-cheveux lorsque le plateau 50 est dans sa deuxième position B le long du corps tubulaire 2, l'axe longitudinal de l'arceau 52 peut être placé de manière à être perpendiculaire à l'axe de rotation Ω. Ainsi, l'axe longitudinal de l'arceau 52 sera parallèle à l'axe longitudinal Δ du corps tubulaire lorsque le plateau 50 est dans sa deuxième position B.It should be noted that according to the example shown in Figures 3 and 4 the longitudinal axis of the hoop 52 is substantially parallel to the axis of rotation Ω of the plate 50. However, in order to facilitate the gripping of the hair dryer when the plate 50 is in its second position B along the tubular body 2, the longitudinal axis of the arch 52 may be placed so as to be perpendicular to the axis of rotation Ω. Thus, the longitudinal axis of the arch 52 will be parallel to the longitudinal axis Δ of the tubular body when the plate 50 is in its second position B.

Le sèche-cheveux 1, selon l'invention, ainsi constitué fonctionne, à performance de séchage équivalente, en émettant moins de bruit que les sèche-cheveux selon l'antérieur.The hair dryer 1, according to the invention, thus constituted operates at equivalent drying performance, emitting less noise than hair dryers according to the previous.

Bien entendu, diverses autres modifications peuvent être apportées au sèche-cheveux selon l'invention dans le cadre des revendications annexées.Of course, various other modifications can be made to the hair dryer according to the invention within the scope of the appended claims.

Claims (15)

  1. Hair dryer including:
    - a tubular body (2) of longitudinal axis (Δ) which is open at a front outlet end (4) and which comprises near a rear end (5) opposite the outlet (4) a substantially peripheral air inlet (7),
    - an electric fan (10) which is arranged in the tubular body (2) between the inlet (7) and the outlet (4) and which comprises an electric motor (16) driving in rotation, about an axis parallel to or coincident with the longitudinal axis (Δ) of the tubular body, a rotor (11) located in a work chamber (12) and adapted to suck air in through the inlet (7) and discharge it through the outlet (4),
    - at the rear (6) of the tubular body (2), a central core (20) having the same longitudinal axis (Δ) as the tubular body comprising a peripheral surface (21) which is concave and converges towards the work chamber (12) and which delimits, with the tubular body (2), the air inlet (7) and a suction pipe (13) of annular shape, characterised in that it comprises :
    - in the suction pipe (13), at least one annular curved fin having the same longitudinal axis (Δ) as the tubular body whose intrados (24) and extrados (25) converge towards the work chamber (12).
  2. Hair dryer according to claim 1, characterised in that the smallest dimension of the outlet cross-section (4) is greater than or equal to 80 mm.
  3. Hair dryer according to claim 2, characterised in that the outlet cross-section (4) has the shape of a disc whose diameter (d) is greater than or equal to 80 mm.
  4. Hair dryer according to one of claims 1 to 3, characterised in that the tubular body (2) has a length (L), measured parallel to the longitudinal axis (Δ) between the outlet (4) and a rear end (6) of the core, which is less than or equal to 1.5 times the largest outer diameter (D) of the tubular body (2).
  5. Hair dryer according to claim 4, characterised in that the largest outer diameter (D) of the tubular body (2) is between 100 mm and 250 mm.
  6. Hair dryer according to one of claims 1 to 5, characterised in that the core (20) comprises at the end opposite the outlet (4) a back (40) of flat or convex shape.
  7. Hair dryer according to one of claims 1 to 6, characterised in that:
    - the upstream part of the peripheral surface (21) of the central core (20), which is located next to the air inlet (7), is tangential either to a plane perpendicular to the longitudinal axis (Δ) of the tubular body or to a cone of revolution of longitudinal axis (Δ) of the tubular body which converges towards the work chamber (12) and whose peak angle (α) is obtuse,
    - the downstream part of the peripheral surface (21) of the central core (20), which is located next to the work chamber (12), is tangential to a cylinder of revolution of longitudinal axis (Δ) of the tubular body.
  8. Hair dryer according to one of claims 1 to 7, characterised in that
    - the upstream part (32) of the intrados (24) and the extrados (25) of each fin (22, 23) is tangential to a cone of revolution of longitudinal axis (Δ) of the tubular body which converges towards the work chamber (12) and whose peak angle (α) is obtuse,
    - the downstream part (33) of the intrados (24) and the extrados (25) of each fin (22, 23) is tangential to a cylinder of revolution of longitudinal axis (Δ) of the tubular body.
  9. Hair dryer according to one of claims 1 to 8, characterised in that the electric motor (16) is located inside the core (20).
  10. Hair dryer according to one of claims 1 to 9, characterised in that the rotor (11) comprises at least one axial fan blade.
  11. Hair dryer according to one of claims 1 to 10, characterised in that it comprises gripping means (3) including a palm pressing surface (P) for at least part of the palm side of a hand and a counter-pressing surface (41) on at least part of the back of the hand.
  12. Hair dryer according to claim 11, characterised in that the gripping means are adapted so that the pressing surface (P) is located opposite to the outlet (4) with respect to the tubular body (2).
  13. Hair dryer according to claim 11 or 12, characterised in that the gripping means (3) are movable between a first position (A) in which the palm pressing surface (P) is located opposite to the outlet (4) with respect to the tubular body (2) and a second position (B) in which the pressing surface (P) is located on the side of the tubular body (2).
  14. Hair dryer according to one of claims 11 to 13, characterised in that the gripping means (3) comprise a plate (50) whose upper side forms the palm surface (P) and an arc (42) which is attached to the plate (50) and which delimits with the plate (50) a space to pass part of the hand, the side of the arc (42) directed towards the plate forming the counter-pressing surface (41).
  15. Hair dryer according to claim 14, characterised in that the plate is fixed on the tubular body (2) by at least one arm which is connected to the tubular body (2) by a pivot link of axis perpendicular to the longitudinal axis (Δ) of the tubular body.
EP12795548.2A 2011-11-18 2012-11-14 Hairdryer with concentric blades Active EP2779863B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1160561A FR2982747B1 (en) 2011-11-18 2011-11-18 HAIRDRYER WITH CONCENTRIC FINES
PCT/FR2012/052628 WO2013072626A1 (en) 2011-11-18 2012-11-14 Hairdryer with concentric blades

Publications (2)

Publication Number Publication Date
EP2779863A1 EP2779863A1 (en) 2014-09-24
EP2779863B1 true EP2779863B1 (en) 2015-12-30

Family

ID=47291142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12795548.2A Active EP2779863B1 (en) 2011-11-18 2012-11-14 Hairdryer with concentric blades

Country Status (5)

Country Link
EP (1) EP2779863B1 (en)
CN (1) CN204207259U (en)
ES (1) ES2565097T3 (en)
FR (1) FR2982747B1 (en)
WO (1) WO2013072626A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015217259A (en) * 2014-05-21 2015-12-07 三發電器製造廠有限公司 Hair dryer
WO2016151605A1 (en) * 2015-03-20 2016-09-29 Bembo Pietro Gianbattista Device for hairdryer to reverse the airflow towards the suction side for the ejection of dust
FR3039376B1 (en) * 2015-07-28 2017-09-01 Seb Sa HAIRDRYER WITH OPTIMIZED AIR INTAKE CANALIZATION
FR3039377B1 (en) * 2015-07-28 2017-09-01 Seb Sa HAIR DRYER WITH COANDA EFFECT AIR OUTPUT DUCT

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6021705A (en) * 1983-07-14 1985-02-04 松下電工株式会社 Hair dryer

Also Published As

Publication number Publication date
CN204207259U (en) 2015-03-18
WO2013072626A1 (en) 2013-05-23
ES2565097T3 (en) 2016-03-31
FR2982747A1 (en) 2013-05-24
EP2779863A1 (en) 2014-09-24
FR2982747B1 (en) 2014-01-10

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