EP3328238B1 - Hair dryer with an duct air inlet having enhanced acoustic performance - Google Patents

Hair dryer with an duct air inlet having enhanced acoustic performance Download PDF

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Publication number
EP3328238B1
EP3328238B1 EP16744818.2A EP16744818A EP3328238B1 EP 3328238 B1 EP3328238 B1 EP 3328238B1 EP 16744818 A EP16744818 A EP 16744818A EP 3328238 B1 EP3328238 B1 EP 3328238B1
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EP
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Prior art keywords
hairdryer
air
circulation chamber
vanes
fins
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EP16744818.2A
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German (de)
French (fr)
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EP3328238A1 (en
Inventor
Nicolas Lauchet
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SEB SA
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SEB SA
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    • 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 the field of hair dryers for hair treatment by drying. It aims first of all to optimize the performance of drying and feeling.
  • hair dryers include an air inlet area, an air circulation chamber, an air outlet area, an air circulation system and a heating element.
  • the air circulation system and the heating element are integrated in the circulation chamber.
  • the air circulation system includes a motor that drives a propeller to draw outside air through the entrance area.
  • the circulation system also comprises a rectifier equipped with vanes configured to channel the air blown out of the propeller. This blown and ducted air is then conveyed downstream of the flow chamber through the heating element. The more or less heated air is then blown outside, through the outlet area, to dry the hair.
  • the document WO2013 / 072625 discloses a hair dryer having fins at the air inlet area.
  • JPH02252404 which comprises fins arranged in the inlet zone, these fins for channeling the air sucked towards the propeller by limiting the pressure losses, which contributes to improving the speed of the air blown out and, thus, drying and feeling.
  • This type of design however, remains acoustically inefficient. In fact, the design of this hair dryer, and more generally of all existing hair dryers, does not make it possible to reduce the noise nuisance due in particular to the rotation of the motor.
  • the present invention also aims to channel the air sucked to the propeller by limiting the pressure losses, while overcoming the inconvenience of noise nuisance appearing on hair dryers such as that described in JPH02252404.
  • the hair dryer according to the invention comprises an air circulation chamber provided with an inlet zone and an outlet zone.
  • the hair dryer also comprises an air circulation system which comprises a motor and a propeller configured in the circulation chamber for sucking the outside air through the inlet zone and for conveying this air from upstream to downstream to the exit zone.
  • This air circulation system also comprises a rectifier equipped with vanes configured to channel the air blown out of the propeller.
  • a heating element is arranged in the circulation chamber downstream of the rectifier, said heating element making it possible to heat more or less the circulating air as it passes around said heating element, before being blown out on the outside. through the exit area.
  • the hair dryer according to the invention comprises at least two fins arranged at the entrance area. These fins are configured together and vis-à-vis the inlet area to form air inlet channels through which the air sucked under the action of the propeller enters the flow chamber. These air intake ducts are oriented towards the propeller, which makes it possible to channel the air towards the propeller by limiting the pressure drops. In addition, these at least two fins are configured to block the lines of sight towards the interior of the circulation chamber, as if a wall closed off the entry zone into the circulation chamber.
  • the sucked air is channeled towards the helix and the sound waves generated by the rotation of the motor propagate in the channels by bouncing against the fins constituting said closure wall, which attenuates the sound waves during their exit from the channels and, thus, reduces the noise nuisance.
  • lines of sight in the circulation chamber are meant lines parallel to a longitudinal axis of the circulation chamber and on the alignment of which a user can place his eye to try to see the inside of the chamber. circulation from the back of the hair dryer.
  • the fins each have a tulip shape which opens upstream of said hair dryer. These fins are nested one inside the other with a spacing between them so as to form said channels oriented towards the helix.
  • the fins are configured to cover the entrance area and to overlap at least partially successively one after the other, so as to block the lines of sight to the interior of the circulation chamber.
  • This tulip shape promotes the recovery of the entire entrance area to form said closure wall, while having no negative influence on the section of the channels used.
  • this tulip shape promotes an outside air intake on the side of the hair dryer.
  • the hair dryer comprises between two and ten tulips.
  • the hair dryer comprises two or four tulips.
  • the hair dryer in one embodiment, it comprises a base (or cover) assembled with the circulation chamber, in the input zone.
  • This base comprises said at least two fins.
  • This design facilitates the separate implementation of the circulation chamber and the base (or hood) with the fins.
  • removable fixing means are implemented between the circulation chamber and the base so as to allow the removal of the base. This facilitates access to the interior of the circulation chamber for access to the air circulation system, for example for the replacement of the propeller or any other maintenance operation. This also allows the replacement of the cap by another.
  • the base comprises tabs for holding the fins together. This facilitates the implementation of the fins with a regular spacing between them.
  • the hair dryer comprises a piping system configured in the inlet zone for discharging outwardly the air discharged to the circumference of the propeller in the circulation chamber.
  • a large pressure difference exists between the upstream of the propeller and the downstream thereof.
  • it is necessary to leave a space between the inner wall of the flow chamber and the circumferential contour of the propeller. This causes the existence of a circumferential space in which a pressure balance occurs and a portion of the air is forced back by the propeller instead of being sucked and then blown.
  • the pipe system thus allows this air discharged by the propeller to be evacuated and to drive it outside rather than leaving it in the circulation chamber. This advantageously avoids any turbulence and disruption of the flow of air sucked and channeled through the fins.
  • the channeling system comprises a conduit having a shape of revolution, arranged in the input area adjacent to the inner wall of the circulation chamber. This form of revolution ensures an evacuation of the air discharged over the entire inner periphery of the circulation chamber, in the entry zone.
  • a conduit having a shape of revolution ensures an evacuation of the air discharged over the entire inner periphery of the circulation chamber, in the entry zone.
  • the pipe system comprises means for reducing the speed of the air discharged to the outside. This reduction in speed avoids generating turbulence outside the entry area of the hair dryer, which could disturb the entry of suitable air in the channels formed by the fins.
  • the channeling system comprises means of attenuation of noise. it also contributes to the optimization of the acoustic performance of the hair dryer.
  • the channeling system consists of a conduit having a shape of revolution, said conduit having in a longitudinal section plane a form of baffle.
  • This form in a chicane advantageously allows the implementation of both means for reducing the speed of the air and the means of attenuation of noise, as mentioned above.
  • the hair dryer comprises a cap (or cover) as mentioned above with any of its features.
  • this base comprises the pipe system in addition to the fins. This design facilitates the separate implementation of the circulation chamber and the base with the pipe system and the fins.
  • the at least two fins and the ducting system are configured so that the air discharged by said ducting system is sucked back by the propeller through air intake channels.
  • the tulip shape of the fins and the baffle shape of the conduit are configured to allow this implementation.
  • the hair dryer 1 comprises a body 2 which has a more or less cylindrical shape for constituting a circulation chamber 3, which has a longitudinal axis X.
  • This circulation chamber 3 comprises an inlet zone 4 and a zone of output 5.
  • a circulation system 6 is arranged in this circulation chamber 3, which makes it possible to draw ambient air through the inlet zone, then to convey this air over the entire length of the circulation chamber 3 so as to then blow the air outside the hair dryer 1, through the outlet zone 5.
  • This circulation system 6 comprises a propeller 7 arranged near the inlet zone 4, a motor 8 for rotating the propeller 7, and a rectifier 9 arranged downstream of the propeller 7 and for channeling the air output of this propeller 7.
  • the hairdryer 1 also comprises a heating element 10 arranged in downstream of the rectifier 9, which allows heating the air in the downstream part of the circulation chamber 3, before its expulsion through the exit zone 5.
  • the hairdryer 1 also comprises means for controlling and adjusting the motor 8 and the heating element 10 (not shown) which make it possible to modify individually the speed of rotation of the motor 8 and the heating temperature of the heating element 10, from an off position to a full power position. All these characteristics are generally found on hair dryers, they are not detailed in the following description.
  • the invention relates, in a first aspect, to the implementation of means for channeling the air sucked by the propeller 7 at the level of the inlet zone 4. These channeling means are configured to reduce the losses of loads and to reduce noise pollution due in particular to the operation of the motor 8, the rotation of the propeller 7 and the flow of air flowing in the circulation chamber 3.
  • these means are implemented by fins 11 arranged on a base 12 (or hood) which is assembled with the inlet zone 4 of the circulation chamber 3.
  • a base 12 or hood
  • fins 11a-11d are arranged on the base 12.
  • FIGs 5 and 6 only two fins 11a, 11b are arranged on the base 12, while on the Figures 7 and 8 six fins 11a-11f are arranged on the base 12.
  • the fins 11a-11d each have the shape of a tulip which opens upstream of the hair dryer 1.
  • these fins 11a-11d are configured to be spaced regularly between them so as to form three channels 13a-13c between said fins 11a-11d.
  • the base 12 comprises a central conduit 14 whose wall 14a has a baffle shape as illustrated in FIGS. Figures 2 to 3 .
  • the fourth fin 11d is further configured with respect to this wall 14a to form a channel 13d, as illustrated in these Figures 2 to 3 .
  • the four fins 11a-11d are configured together to partially overlap one after the other while maintaining the presence of the three channels 13a - 13c.
  • the fourth fin 11d and the wall 14a are configured so that said fin 11d partially overlaps said wall 14a while maintaining the presence of the fourth channel 13d.
  • These aforementioned partial overlays make it possible to completely cover the central duct 14 disposed in the inlet zone 4 of the circulation chamber 3, as if a wall were disposed in front of this inlet zone 4 to seal it, which is notes on the figure 4 .
  • This makes it possible to block the lines of sight inside the circulation chamber 3.
  • This design advantageously allows the sound waves, produced in particular by the engine 8, the rotation of the helix 7 and the circulating air flow, to escape through the channels 13a-13d by bouncing on the fins 11a-11d and on the wall 14a, which attenuates the sound waves.
  • this tulip-shaped fins 11a-11d advantageously allows the channels 13a-13d to channel the sucked air with a linear flow to the propeller 7, which limits the pressure losses.
  • the first tulip 11a is configured to present an axial channel 13a, as illustrated in FIG. figure 6 .
  • This axial channel 13a is closed by a plug 22 (not shown on the figure 6 ) disposed at the inlet of the axial channel 13a.
  • This alternative embodiment also makes it possible to visually close the access to the central duct 14 of the base 12 and thus to the inlet zone 4 of the circulation chamber 3, as it appears on FIG.
  • the axial channel 13a arranged in the center of the first fin 11a makes it possible to maintain an access in the circulation chamber 3 after removal of the plug 22, in particular for a repair operation on the hub of the propeller 7.
  • the section of this axial channel 13a will be reduced, or even eliminated to favor a first fin 11a comparable to that of Figures 1 to 4 .
  • a second aspect of the invention relates to the implementation of a pipe system 15 in the inlet zone 4, configured to evacuate to the outside air expelled at the circumference of the propeller 7 in the chamber 3.
  • the ends 16 of the blades 17 of the helix 7 constituting the circumferential contour of said helix 7, are spaced relative to the inner wall 3a of the circulation chamber 3, for reasons of mounting between said parts. This causes the existence of a circumferential space 18 between the helix 7 and the inner wall 3a, as illustrated in FIG. figures 2 and 6 in which a pressure equilibrium occurs.
  • Part of the air sucked is then discharged by the propeller 7 instead of being blown downstream of the circulation chamber 3, because of the existence of a strong pressure difference between the upstream side of the chamber. the propeller 7 and the downstream thereof.
  • the pipe system 15 thus allows this air discharged outside the propeller 7 to be discharged outside rather than to be left in the circulation chamber 3, upstream of the propeller. This advantageously avoids that the discharge air generates turbulence in the inlet zone 4, which would have the disadvantage of disturbing the flow of air sucked and channeled through the fins 11a - 11b or 11a - 11d.
  • This ducting system 15 is preferably implemented on the base 12, thanks to the presence of a discharge duct 19, arranged around the central duct 14.
  • This duct 19 is arranged at the circumference of the zone. 4, near the circumferential space 18, as illustrated in FIG. figures 2 and 6 for the two embodiments of the hair dryer 1.
  • the air discharged by the propeller 7 is evacuated outside by this exhaust duct 19 rather than generating turbulence in the circulation chamber 3, in upstream of the helix 7, which avoids disrupting the proper flow of air sucked by the channels 13a - 13b or 13a - 13d.
  • the inner wall 19a of the exhaust duct 19 is constituted by the wall 14a of the central duct 14, and thus has the form of a baffle, as explained above.
  • the outer wall 19b of the exhaust duct 19 also has a baffle shape which is more pronounced on the embodiment of the Figures 5 and 6 that on the embodiment of the Figures 1 to 4 , as appears in the light of said figures.
  • the shapes of the inner 19a and outer 19b walls allow the exhaust duct 19 to have a baffle shape, which advantageously allows to break the speed of the discharged air and evacuating outside of the exhaust duct 19. This avoids disturbing the suction of the outside air through the channels 13a-13c or 13a-13d.
  • This baffle shape of the evacuation duct 19 also makes it possible to block the line of sight in the circulation chamber 3, as appears on the figure 4 and 5 for the two embodiments, similar to the effect produced by the configuration of the fins 11a-11b or 11a-11d.
  • the evacuation duct 19 also reduces the noise by forcing the waves to bounce on the inner walls 19a and outer 19b of said duct.
  • the tulip shape of the fins 11a-11b or 11a-11d makes it possible to have channels 13a-13c or 13a-13d whose upstream ends are oriented on the sides of the hair dryer 1, and not along its longitudinal axis X, as shown in FIG. appears in particular on figures 2 and 6 .
  • This makes it possible to draw outside air on the sides of the hair dryer 1.
  • the baffle shape of the exhaust duct 19 makes it possible to expel the air discharged on the sides, near the upstream ends of the channels. 13a-13c or 13a-13d. This advantageously allows to suck again this discharge air whose flow rate was previously broken during its evacuation.
  • the base 12 comprises three retaining tabs 20a, 20b, 20c arranged between the fins 11a, 11b and the wall 14a of the central duct 14, to maintain said fins 11a, 11b with a regular spacing.
  • These holding tabs 20a, 20b, 20c are distributed uniformly around the base 12, as illustrated in FIG. figure 5 .
  • Such holding lugs may also be envisaged between the fins 11a-11d and the wall 14a of the central duct 14, in the embodiment of the invention.
  • Figures 1 to 4 are also be envisaged between the fins 11a-11d and the wall 14a of the central duct 14, in the embodiment of the invention.
  • connection points 21a, 21b are implemented between the inner wall 19a and the outer wall 19b on the base 12, as illustrated in FIG. figure 2 to maintain said elements in position relative to one another.
  • Such points of connection can be envisaged in the embodiment of the Figures 5 and 6 .
  • Such connection points can also be envisaged between the fins 11a-11d and the wall 14a, on the embodiment of the Figures 1 to 4 , or even between the fins 11a, 11b and the wall 14a, on the embodiment of the Figures 5 and 6 .
  • the upstream end 2a of the body 2 of the hair dryer 1 and the downstream end 12a of the base 12 are configured to allow a removable assembly of said base 12, for example to access the propeller 7. It can provide a nesting of the downstream end 12a of the base 12 on the upstream end 2a of the body 2, or holding fingers (not shown) for snapping the downstream end 12a on the upstream end 2a.
  • the first tulip 11a is configured to present an axial channel 13a which opens opposite the hub of the propeller 7 but which is closed at the inlet of the channel 13a by a plug 22.
  • the wall 14a extends transversely to the longitudinal axis X until it reaches the wall of the last fin 11f.
  • the last fin 11f only promotes the introduction of air through the sixth channel 13f formed between the latter fin 11f and the fifth fin 13e.
  • the fins 11a-11f have a particular arrangement in which a plurality of fins 11a-11e extend from different transverse planes.
  • the first fin 13a extends from a transverse plane farther from the helix than the transverse plane from which extends the second fin 13b.
  • the second fin 13b extends from a transverse plane farther from the helix than the transverse plane from which the third fin 13c extends and so on until the fifth fin 11e.
  • This arrangement makes it possible to form a zone 23 of determined volume situated opposite the hub of the propeller.
  • This zone 23 improves the performance of the helix.
  • this zone 23 promotes the flow of incoming air facing the hub of the propeller. This air can thus join without constraint the zone useful propeller, located further out, without having to abut against the hub of the propeller.

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  • Cleaning And Drying Hair (AREA)

Description

Domaine techniqueTechnical area

La présente invention se rapporte au domaine des sèche-cheveux pour le traitement des cheveux par séchage. Elle vise tout d'abord à optimiser les performances de séchage et de ressenti.The present invention relates to the field of hair dryers for hair treatment by drying. It aims first of all to optimize the performance of drying and feeling.

Etat de la techniqueState of the art

Traditionnellement, les sèche-cheveux comprennent une zone d'entrée d'air, une chambre de circulation d'air, une zone de sortie d'air, un système de circulation d'air et un élément chauffant. Le système de circulation d'air et l'élément chauffant sont intégrés dans la chambre de circulation. Le système de circulation d'air comprend un moteur qui entraîne une hélice permettant d'aspirer l'air extérieur au travers de la zone d'entrée. Le système de circulation comprend également un redresseur muni d'aubes configurées pour canaliser l'air soufflé en sortie de l'hélice. Cet air soufflé et canalisé est ensuite véhiculé vers l'aval de la chambre de circulation en passant par l'élément chauffant. L'air plus ou moins chauffé est ensuite soufflé à l'extérieur, au travers de la zone de sortie, de sorte à sécher les cheveux.Traditionally, hair dryers include an air inlet area, an air circulation chamber, an air outlet area, an air circulation system and a heating element. The air circulation system and the heating element are integrated in the circulation chamber. The air circulation system includes a motor that drives a propeller to draw outside air through the entrance area. The circulation system also comprises a rectifier equipped with vanes configured to channel the air blown out of the propeller. This blown and ducted air is then conveyed downstream of the flow chamber through the heating element. The more or less heated air is then blown outside, through the outlet area, to dry the hair.

Le document WO2013/072625 décrit un sèche-cheveux comprenant des ailettes au niveau de la zone d'entrée d'air.The document WO2013 / 072625 discloses a hair dryer having fins at the air inlet area.

Il est connu le brevet japonais publié sous le numéro JPH02252404 qui comprend des ailettes agencées dans la zone d'entrée, ces ailettes permettant de canaliser l'air aspiré vers l'hélice en limitant les pertes de charge, ce qui contribue à améliorer la vitesse de l'air soufflé en sortie et, ainsi, le séchage et le ressenti. Ce type de conception reste cependant peu performant sur le plan acoustique. En effet, la conception de ce sèche-cheveux, et plus généralement de tous les sèche-cheveux existants, ne permet pas d'atténuer les nuisances sonores dues notamment à la rotation du moteur.It is known the Japanese patent published under the number JPH02252404 which comprises fins arranged in the inlet zone, these fins for channeling the air sucked towards the propeller by limiting the pressure losses, which contributes to improving the speed of the air blown out and, thus, drying and feeling. This type of design, however, remains acoustically inefficient. In fact, the design of this hair dryer, and more generally of all existing hair dryers, does not make it possible to reduce the noise nuisance due in particular to the rotation of the motor.

Résumé de l'inventionSummary of the invention

La présente invention vise également à canaliser l'air aspiré vers l'hélice en limitant les pertes de charge, tout en palliant cet inconvénient de nuisance sonore apparaissant sur les sèche-cheveux tels que celui décrit dans le brevet JPH02252404.The present invention also aims to channel the air sucked to the propeller by limiting the pressure losses, while overcoming the inconvenience of noise nuisance appearing on hair dryers such as that described in JPH02252404.

A cet effet, le sèche-cheveux selon l'invention comprend une chambre de circulation d'air munie d'une zone d'entrée et d'une zone de sortie. le sèche-cheveux comprend également un système de circulation d'air qui comporte un moteur et une hélice configurés dans la chambre de circulation pour aspirer l'air extérieur au travers de la zone d'entrée et pour véhiculer cet air de l'amont vers l'aval jusqu'à la zone de sortie. Ce système de circulation d'air comprend également un redresseur muni d'aubes configurées pour canaliser l'air soufflé en sortie de l'hélice. En outre, un élément chauffant est agencé dans la chambre de circulation en aval du redresseur, ledit élément chauffant permettant de chauffer plus ou moins l'air circulant lors de son passage autour dudit élément chauffant, avant d'être soufflé à l'extérieur au travers de la zone de sortie.For this purpose, the hair dryer according to the invention comprises an air circulation chamber provided with an inlet zone and an outlet zone. the hair dryer also comprises an air circulation system which comprises a motor and a propeller configured in the circulation chamber for sucking the outside air through the inlet zone and for conveying this air from upstream to downstream to the exit zone. This air circulation system also comprises a rectifier equipped with vanes configured to channel the air blown out of the propeller. In addition, a heating element is arranged in the circulation chamber downstream of the rectifier, said heating element making it possible to heat more or less the circulating air as it passes around said heating element, before being blown out on the outside. through the exit area.

De manière remarquable, le sèche-cheveux selon l'invention comprend au moins deux ailettes agencées au niveau de la zone d'entrée. Ces ailettes sont configurées entre elles et vis-à-vis de la zone d'entrée pour former des canaux d'entrée d'air par lesquels l'air aspiré sous l'action de l'hélice pénètre dans la chambre de circulation. Ces canaux d'entrée d'air sont orientés vers l'hélice, ce qui permet de canaliser l'air vers l'hélice en limitant les pertes de charge. En outre, ces au moins deux ailettes sont configurées pour bloquer les lignes de visée vers l'intérieur de la chambre de circulation, comme si une paroi obturait la zone d'entrée dans la chambre de circulation. Ainsi, l'air aspiré est canalisé vers l'hélice et les ondes sonores générées par la rotation du moteur se propagent dans les canaux en rebondissant contre les ailettes constituant ladite paroi d'obturation, ce qui permet d'atténuer les ondes sonores lors de leur sortie des canaux et, ainsi, réduit les nuisances sonores.Remarkably, the hair dryer according to the invention comprises at least two fins arranged at the entrance area. These fins are configured together and vis-à-vis the inlet area to form air inlet channels through which the air sucked under the action of the propeller enters the flow chamber. These air intake ducts are oriented towards the propeller, which makes it possible to channel the air towards the propeller by limiting the pressure drops. In addition, these at least two fins are configured to block the lines of sight towards the interior of the circulation chamber, as if a wall closed off the entry zone into the circulation chamber. Thus, the sucked air is channeled towards the helix and the sound waves generated by the rotation of the motor propagate in the channels by bouncing against the fins constituting said closure wall, which attenuates the sound waves during their exit from the channels and, thus, reduces the noise nuisance.

On entend par lignes de visée vers l'intérieur de la chambre de circulation des lignes parallèles à un axe longitudinal de la chambre de circulation et sur l'alignement desquelles un utilisateur peut placer son oeil pour tenter de voir l'intérieur de la chambre de circulation depuis l'arrière du sèche-cheveux.By lines of sight in the circulation chamber are meant lines parallel to a longitudinal axis of the circulation chamber and on the alignment of which a user can place his eye to try to see the inside of the chamber. circulation from the back of the hair dryer.

Dans une réalisation du sèche-cheveux selon l'invention, les ailettes présentent chacune une forme de tulipe qui s'ouvre vers l'amont dudit sèche-cheveux. Ces ailettes sont imbriquées les unes dans les autres avec un espacement entre elles de sorte à former lesdits canaux orientés vers l'hélice. En outre, les ailettes sont configurées pour recouvrir la zone d'entrée et pour se recouvrir au moins partiellement successivement les unes à la suite des autres, de sorte à bloquer les lignes de visée vers l'intérieur de la chambre de circulation. Cette forme en tulipe favorise le recouvrement de toute la zone d'entrée pour constituer ladite paroi d'obturation, tout en n'ayant aucune influence négative sur la section des canaux mis en oeuvre. Par ailleurs, cette forme en tulipe favorise une prise de l'air à l'extérieur, sur les côté latéraux du sèche-cheveux.In one embodiment of the hair dryer according to the invention, the fins each have a tulip shape which opens upstream of said hair dryer. These fins are nested one inside the other with a spacing between them so as to form said channels oriented towards the helix. In addition, the fins are configured to cover the entrance area and to overlap at least partially successively one after the other, so as to block the lines of sight to the interior of the circulation chamber. This tulip shape promotes the recovery of the entire entrance area to form said closure wall, while having no negative influence on the section of the channels used. In addition, this tulip shape promotes an outside air intake on the side of the hair dryer.

Dans une réalisation du sèche-cheveux selon l'invention, celui-ci comprend entre deux et dix tulipes. De préférence, le sèche-cheveux comprend deux ou quatre tulipes.In one embodiment of the hair dryer according to the invention, it comprises between two and ten tulips. Preferably, the hair dryer comprises two or four tulips.

Dans une réalisation du sèche-cheveux selon l'invention, celui-ci comprend un culot (ou capot) assemblé avec la chambre de circulation, dans la zone d'entrée. Ce culot comprend lesdites au moins deux ailettes. Cette conception facilite la mise en oeuvre séparément de la chambre de circulation et du culot (ou capot) avec les ailettes. Dans une réalisation préférentielle, des moyens de fixation amovibles sont mis en oeuvre entre la chambre de circulation et le culot de sorte à permettre le retrait du culot. Cela facilite l'accès à l'intérieur de la chambre de circulation pour accéder au système de circulation d'air, par exemple pour le remplacement de l'hélice ou toute autre opération de maintenance. Cela permet également le remplacement du culot par un autre.In one embodiment of the hair dryer according to the invention, it comprises a base (or cover) assembled with the circulation chamber, in the input zone. This base comprises said at least two fins. This design facilitates the separate implementation of the circulation chamber and the base (or hood) with the fins. In a preferred embodiment, removable fixing means are implemented between the circulation chamber and the base so as to allow the removal of the base. This facilitates access to the interior of the circulation chamber for access to the air circulation system, for example for the replacement of the propeller or any other maintenance operation. This also allows the replacement of the cap by another.

Dans une réalisation du sèche-cheveux selon l'invention, le culot comprend des pattes de maintien des ailettes entre elles. Cela facilite la mise en oeuvre des ailettes avec un espacement régulier entre elles.In one embodiment of the hair dryer according to the invention, the base comprises tabs for holding the fins together. This facilitates the implementation of the fins with a regular spacing between them.

Dans une réalisation du sèche-cheveux selon l'invention, celui-ci comprend un système de canalisation configuré dans la zone d'entrée pour évacuer vers l'extérieur l'air refoulé à la circonférence de l'hélice dans la chambre de circulation. En effet, une forte différence de pression existe entre l'amont de l'hélice et l'aval de celle-ci. Or, pour des raisons de jeux de montage entre les pièces, il est nécessaire de laisser un espace entre la paroi interne de la chambre de circulation et le contour circonférentiel de l'hélice. Cela engendre l'existence d'un espace circonférentiel dans lequel un équilibre de pression se produit et une partie de l'air est refoulée par l'hélice au lieu d'être aspirée puis soufflée. Le système de canalisation permet donc d'évacuer cet air refoulé par l'hélice et de le chasser à l'extérieur plutôt que de le laisser dans la chambre de circulation. Cela permet avantageusement d'éviter toute turbulence et toute perturbation de l'écoulement de l'air aspiré et canalisé au travers des ailettes.In one embodiment of the hair dryer according to the invention, it comprises a piping system configured in the inlet zone for discharging outwardly the air discharged to the circumference of the propeller in the circulation chamber. Indeed, a large pressure difference exists between the upstream of the propeller and the downstream thereof. However, for reasons of mounting clearance between the parts, it is necessary to leave a space between the inner wall of the flow chamber and the circumferential contour of the propeller. This causes the existence of a circumferential space in which a pressure balance occurs and a portion of the air is forced back by the propeller instead of being sucked and then blown. The pipe system thus allows this air discharged by the propeller to be evacuated and to drive it outside rather than leaving it in the circulation chamber. This advantageously avoids any turbulence and disruption of the flow of air sucked and channeled through the fins.

Dans une réalisation du sèche-cheveux selon l'invention, le système de canalisation comprend un conduit ayant une forme de révolution, agencé dans la zone d'entrée de manière attenante à la paroi interne de la chambre de circulation. Cette forme de révolution assure une évacuation de l'air refoulé sur toute la périphérie interne de la chambre de circulation, dans la zone d'entrée. On pourrait toutefois prévoir plusieurs conduits répartis uniformément sur toute la périphérie dans la zone d'entrée, sans sortir du cadre de l'invention.In one embodiment of the hair dryer according to the invention, the channeling system comprises a conduit having a shape of revolution, arranged in the input area adjacent to the inner wall of the circulation chamber. This form of revolution ensures an evacuation of the air discharged over the entire inner periphery of the circulation chamber, in the entry zone. However, it would be possible to provide several conduits uniformly distributed over the entire periphery in the entry zone, without departing from the scope of the invention.

Dans une réalisation du sèche-cheveux selon l'invention, le système de canalisation comprend des moyens de réduction de la vitesse de l'air refoulé vers l'extérieur. Cette réduction de la vitesse évite de générer des turbulences à l'extérieur de la zone d'entrée du sèche-cheveux, lesquelles pourraient perturber l'entrée d'air convenable dans les canaux constitués par les ailettes.In one embodiment of the hair dryer according to the invention, the pipe system comprises means for reducing the speed of the air discharged to the outside. This reduction in speed avoids generating turbulence outside the entry area of the hair dryer, which could disturb the entry of suitable air in the channels formed by the fins.

Dans une réalisation du sèche-cheveux selon l'invention, le système de canalisation comprend des moyens d'atténuation des nuisances sonores. Cela contribue également à l'optimisation des performances acoustiques du sèche-cheveux.In one embodiment of the hair dryer according to the invention, the channeling system comprises means of attenuation of noise. it also contributes to the optimization of the acoustic performance of the hair dryer.

Dans une réalisation préférentielle du sèche-cheveux selon l'invention, le système de canalisation est constitué d'un conduit ayant une forme de révolution, ledit conduit présentant dans un plan de coupe longitudinal une forme de chicane. Cette forme en chicane permet avantageusement la mise en oeuvre à la fois des moyens de réduction de la vitesse de l'air et des moyens d'atténuation des nuisances sonores, tels que précités.In a preferred embodiment of the hair dryer according to the invention, the channeling system consists of a conduit having a shape of revolution, said conduit having in a longitudinal section plane a form of baffle. This form in a chicane advantageously allows the implementation of both means for reducing the speed of the air and the means of attenuation of noise, as mentioned above.

Dans une réalisation du sèche-cheveux selon l'invention, celui-ci comporte un culot (ou capot) tel que précité avec l'une quelconque de ses caractéristiques. En outre, ce culot comprend le système de canalisation en complément des ailettes. Cette conception facilite la mise en oeuvre séparément de la chambre de circulation et du culot avec le système de canalisation et les ailettes.In one embodiment of the hair dryer according to the invention, it comprises a cap (or cover) as mentioned above with any of its features. In addition, this base comprises the pipe system in addition to the fins. This design facilitates the separate implementation of the circulation chamber and the base with the pipe system and the fins.

Dans une réalisation du sèche-cheveux selon l'invention, les au moins deux ailettes et le système de canalisation, tels que précités, sont configurés pour que l'air refoulé par ledit système de canalisation soit aspiré de nouveau par l'hélice au travers des canaux d'entrée d'air. Dans une réalisation préférentielle, la forme en tulipe des ailettes et la forme en chicane du conduit sont configurées pour permettre cette mise en oeuvre.In one embodiment of the hair dryer according to the invention, the at least two fins and the ducting system, as mentioned above, are configured so that the air discharged by said ducting system is sucked back by the propeller through air intake channels. In a preferred embodiment, the tulip shape of the fins and the baffle shape of the conduit are configured to allow this implementation.

Brève description des figuresBrief description of the figures

La description suivante d'un mode de réalisation préférentielle permet de mettre en lumière l'objet de l'invention, à l'appui de figures, parmi lesquelles :

  • La figure 1 illustre une vue d'ensemble en coupe d'un sèche-cheveux selon un mode de réalisation de l'invention ;
  • La figure 2 illustre une vue partielle agrandie de la partie arrière du sèche-cheveux de la figure 1 ;
  • La figure 3 illustre une vue en coupe du culot (ou capot) qui intègre notamment les ailettes ;
  • La figure 4 est une vue de côté de la figure 3 ;
  • La figure 5 est une vue de face d'une variante du culot ;
  • La figure 6 est une vue partielle agrandie de la partie arrière d'une variante de sèche-cheveux intégrant le culot de la figure 5.
  • La figure 7 illustre une vue partielle de côté agrandie de la partie arrière d'un sèche-cheveux selon une variante de réalisation.
  • La figure 8 illustre une vue de dessus de la partie arrière du sèche-cheveux illustré à la figure 7.
The following description of a preferred embodiment makes it possible to highlight the object of the invention, in support of figures, among which:
  • The figure 1 illustrates an overall sectional view of a hair dryer according to one embodiment of the invention;
  • The figure 2 illustrates an enlarged partial view of the back of the hair dryer of the figure 1 ;
  • The figure 3 illustrates a sectional view of the base (or cover) which incorporates including the fins;
  • The figure 4 is a side view of the figure 3 ;
  • The figure 5 is a front view of a variant of the base;
  • The figure 6 is an enlarged partial view of the back of a hair dryer variant incorporating the base of the figure 5 .
  • The figure 7 illustrates an enlarged partial side view of the rear portion of a hair dryer according to an alternative embodiment.
  • The figure 8 illustrates a top view of the rear portion of the hair dryer illustrated in figure 7 .

Description détailléedetailed description

Dans la suite de la description, les mêmes références sont utilisées pour décrire les caractéristiques similaires selon les différentes variantes de réalisation.In the rest of the description, the same references are used to describe the similar characteristics according to the different embodiments.

Tel qu'illustré sur la figure 1, le sèche-cheveux 1 comprend un corps 2 qui présente une forme plus ou moins cylindrique permettant de constituer une chambre de circulation 3, laquelle présente un axe longitudinal X. Cette chambre de circulation 3 comprend une zone d'entrée 4 et une zone de sortie 5. Un système de circulation 6 est agencé dans cette chambre de circulation 3, lequel permet d'aspirer l'air ambiant au travers de la zone d'entrée, puis de véhiculer cet air sur toute la longueur de la chambre de circulation 3 de sorte à souffler ensuite l'air à l'extérieur du sèche-cheveux 1, au travers de la zone de sortie 5. Ce système de circulation 6 comprend une hélice 7 agencée à proximité de la zone d'entrée 4, un moteur 8 permettant d'entraîner en rotation l'hélice 7, et un redresseur 9 agencé en aval de l'hélice 7 et permettant de canaliser l'air en sortie de cette hélice 7. Le sèche-cheveux 1 comprend également un élément chauffant 10 agencé en aval du redresseur 9, lequel permet de chauffer l'air dans la partie aval de la chambre de circulation 3, avant son expulsion au travers de la zone de sortie 5. Le sèche-cheveux 1 comprend également des moyens de commande et de réglage du moteur 8 et de l'élément chauffant 10 (non illustrés) qui permettent de modifier individuellement la vitesse de rotation du moteur 8 et la température de chauffe de l'élément chauffant 10, d'une position éteinte à une position pleine puissance. Toutes ces caractéristiques se retrouvent généralement sur les sèche-cheveux, elles ne sont donc pas détaillées dans la suite de la description.As illustrated on the figure 1 , the hair dryer 1 comprises a body 2 which has a more or less cylindrical shape for constituting a circulation chamber 3, which has a longitudinal axis X. This circulation chamber 3 comprises an inlet zone 4 and a zone of output 5. A circulation system 6 is arranged in this circulation chamber 3, which makes it possible to draw ambient air through the inlet zone, then to convey this air over the entire length of the circulation chamber 3 so as to then blow the air outside the hair dryer 1, through the outlet zone 5. This circulation system 6 comprises a propeller 7 arranged near the inlet zone 4, a motor 8 for rotating the propeller 7, and a rectifier 9 arranged downstream of the propeller 7 and for channeling the air output of this propeller 7. The hairdryer 1 also comprises a heating element 10 arranged in downstream of the rectifier 9, which allows heating the air in the downstream part of the circulation chamber 3, before its expulsion through the exit zone 5. The hairdryer 1 also comprises means for controlling and adjusting the motor 8 and the heating element 10 (not shown) which make it possible to modify individually the speed of rotation of the motor 8 and the heating temperature of the heating element 10, from an off position to a full power position. All these characteristics are generally found on hair dryers, they are not detailed in the following description.

L'invention porte, selon un premier aspect, sur la mise en oeuvre de moyens de canalisation de l'air aspiré par l'hélice 7 au niveau de la zone d'entrée 4. Ces moyens de canalisation sont configurés pour réduire les pertes de charges et pour réduire les nuisances sonores dues notamment au fonctionnement du moteur 8, à la rotation de l'hélice 7 et au flux d'air circulant dans la chambre de circulation 3.The invention relates, in a first aspect, to the implementation of means for channeling the air sucked by the propeller 7 at the level of the inlet zone 4. These channeling means are configured to reduce the losses of loads and to reduce noise pollution due in particular to the operation of the motor 8, the rotation of the propeller 7 and the flow of air flowing in the circulation chamber 3.

Tel qu'illustré notamment sur les figures 1 à 3 et 6 à 8, ces moyens sont mis en oeuvre par des ailettes 11 agencées sur un culot 12 (ou capot) qui est assemblé avec la zone d'entrée 4 de la chambre de circulation 3. Sur le mode de réalisation des figures 1 à 4, quatre ailettes 11a - 11d sont agencées sur le culot 12. On peut toutefois prévoir un nombre d'ailettes différent, de préférence compris entre deux et dix ailettes. A titre d'exemple, sur les figures 5 et 6 seules deux ailettes 11a, 11b sont agencées sur le culot 12, tandis que sur les figures 7 et 8 six ailettes 11a-11f sont agencées sur le culot 12.As illustrated in particular in Figures 1 to 3 and 6 to 8 these means are implemented by fins 11 arranged on a base 12 (or hood) which is assembled with the inlet zone 4 of the circulation chamber 3. In the embodiment of Figures 1 to 4 , four fins 11a-11d are arranged on the base 12. However, it is possible to provide a different number of fins, preferably between two and ten fins. For example, on Figures 5 and 6 only two fins 11a, 11b are arranged on the base 12, while on the Figures 7 and 8 six fins 11a-11f are arranged on the base 12.

Dans le mode de réalisation illustré sur les figures 1 à 3, les ailettes 11a-11d présentent chacune la forme d'une tulipe qui s'ouvre vers l'amont du sèche-cheveux 1. En outre, ces ailettes 11a - 11d sont configurées pour être espacées régulièrement entre elles de manière à constituer trois canaux 13a-13c entre lesdites ailettes 11a - 11d. Le culot 12 comprend un conduit central 14 dont la paroi 14a présente une forme en chicane telle qu'illustrée sur les figures 2 à 3. La quatrième ailette 11d est en outre configurée vis-à-vis de cette paroi 14a pour constituer un canal 13d, comme illustré sur ces figures 2 à 3. Par ailleurs, les quatre ailettes 11a - 11d sont configurées entre elles pour se recouvrir partiellement les unes à la suite des autres tout en conservant la présence des trois canaux 13a - 13c. De même, la quatrième ailette 11d et la paroi 14a sont configurées pour que ladite ailette 11d recouvre partiellement ladite paroi 14a en conservant la présence du quatrième canal 13d. Ces recouvrements partiels précités permettent de recouvrir entièrement le conduit central 14 disposé dans la zone d'entrée 4 de la chambre de circulation 3, comme si une paroi était disposée devant cette zone d'entrée 4 pour l'obturer, ce que l'on constate sur la figure 4. Cela permet de bloquer les lignes de visée à l'intérieur de la chambre de circulation 3. Cette conception permet avantageusement aux ondes sonores, produites notamment par le moteur 8, la rotation de l'hélice 7 et le flux d'air circulant, de s'échapper par les canaux 13a - 13d en rebondissant sur les ailettes 11a - 11d et sur la paroi 14a, ce qui atténue les ondes sonores. En outre, cette forme en tulipe des ailettes 11a - 11d permet avantageusement aux canaux 13a - 13d de canaliser l'air aspiré avec un écoulement linéaire jusqu'à l'hélice 7, ce qui limite les pertes de charge.In the embodiment illustrated on the Figures 1 to 3 , the fins 11a-11d each have the shape of a tulip which opens upstream of the hair dryer 1. In addition, these fins 11a-11d are configured to be spaced regularly between them so as to form three channels 13a-13c between said fins 11a-11d. The base 12 comprises a central conduit 14 whose wall 14a has a baffle shape as illustrated in FIGS. Figures 2 to 3 . The fourth fin 11d is further configured with respect to this wall 14a to form a channel 13d, as illustrated in these Figures 2 to 3 . Furthermore, the four fins 11a-11d are configured together to partially overlap one after the other while maintaining the presence of the three channels 13a - 13c. Similarly, the fourth fin 11d and the wall 14a are configured so that said fin 11d partially overlaps said wall 14a while maintaining the presence of the fourth channel 13d. These aforementioned partial overlays make it possible to completely cover the central duct 14 disposed in the inlet zone 4 of the circulation chamber 3, as if a wall were disposed in front of this inlet zone 4 to seal it, which is notes on the figure 4 . This makes it possible to block the lines of sight inside the circulation chamber 3. This design advantageously allows the sound waves, produced in particular by the engine 8, the rotation of the helix 7 and the circulating air flow, to escape through the channels 13a-13d by bouncing on the fins 11a-11d and on the wall 14a, which attenuates the sound waves. In addition, this tulip-shaped fins 11a-11d advantageously allows the channels 13a-13d to channel the sucked air with a linear flow to the propeller 7, which limits the pressure losses.

Sur la variante de réalisation des figures 5 et 6, on retrouve des caractéristiques comparables à celles de la variante de réalisation des figures 1 à 4, avec seulement deux ailettes 11a, 11b qui forment entre elles un canal 13b, la seconde ailette 11b formant avec la paroi 14a du conduit central 14 un canal 13c. En outre la première tulipe 11a est configurée pour présenter un canal axial 13a, tel qu'illustré en figure 6. Ce canal axial 13a est obturé par un bouchon 22 (non illustré sur la figure 6) disposé à l'entrée du canal axial 13a. Cette variante de mise en oeuvre permet également d'obturer visuellement l'accès au conduit central 14 du culot 12 et donc à la zone d'entrée 4 de la chambre de circulation 3, comme cela apparaît sur la figure 5, malgré la présence des canaux 13a - 13c. Cela bloque donc les lignes de visée à l'intérieur de la chambre de circulation 3, permettant une atténuation des ondes sonores qui rebondissent sur les ailettes 11a, 11b et sur la paroi 14a en sortant par les canaux 13b - 13c. Comme cela apparaît sur les figures 5 et 6, le canal axial 13a agencé au centre de la première ailette 11a permet de maintenir un accès dans la chambre de circulation 3 après retrait du bouchon 22, notamment pour une intervention de réparation sur le moyeu de l'hélice 7. De préférence, la section de ce canal axial 13a sera réduite, voire sera supprimée pour privilégier une première ailette 11a comparable à celle des figures 1 à 4.On the variant embodiment of the Figures 5 and 6 , one finds characteristics comparable to those of the variant of realization of Figures 1 to 4 , with only two fins 11a, 11b forming between them a channel 13b, the second fin 11b forming with the wall 14a of the central duct 14 a channel 13c. In addition, the first tulip 11a is configured to present an axial channel 13a, as illustrated in FIG. figure 6 . This axial channel 13a is closed by a plug 22 (not shown on the figure 6 ) disposed at the inlet of the axial channel 13a. This alternative embodiment also makes it possible to visually close the access to the central duct 14 of the base 12 and thus to the inlet zone 4 of the circulation chamber 3, as it appears on FIG. figure 5 , despite the presence of the channels 13a - 13c. This blocks the lines of sight inside the circulation chamber 3, allowing attenuation of the sound waves that bounce on the fins 11a, 11b and on the wall 14a out through the channels 13b - 13c. As it appears on the Figures 5 and 6 , the axial channel 13a arranged in the center of the first fin 11a makes it possible to maintain an access in the circulation chamber 3 after removal of the plug 22, in particular for a repair operation on the hub of the propeller 7. Preferably, the section of this axial channel 13a will be reduced, or even eliminated to favor a first fin 11a comparable to that of Figures 1 to 4 .

Un second aspect de l'invention porte sur la mise en oeuvre d'un système de canalisation 15 dans la zone d'entrée 4, configuré pour évacuer vers l'extérieur l'air refoulé à la circonférence de l'hélice 7 dans la chambre de circulation 3. Tel qu'illustré sur les figures 2 et 6, les extrémités 16 des pales 17 de l'hélice 7, constituant le contour circonférentiel de ladite hélice 7, sont espacées par rapport à la paroi interne 3a de la chambre de circulation 3, pour des raisons de montage entre lesdites pièces. Cela engendre l'existence d'un espace circonférentiel 18 entre l'hélice 7 et la paroi interne 3a, tel qu'illustré en figures 2 et 6, dans lequel un équilibre de pression se produit. Une partie de l'air aspiré est alors refoulé par l'hélice 7 au lieu d'être soufflée vers l'aval de la chambre de circulation 3, du fait de l'existence d'une forte différence de pression entre l'amont de l'hélice 7 et l'aval de celle-ci. Le système de canalisation 15 permet donc d'évacuer à l'extérieur cet air refoulé par l'hélice 7 plutôt que de le laisser dans la chambre de circulation 3, en amont de l'hélice. Cela permet avantageusement d'éviter que l'air refoulé ne génère des turbulences dans la zone d'entrée 4, ce qui aurait pour inconvénient de perturber l'écoulement de l'air aspiré et canalisé au travers des ailettes 11a - 11b ou 11a - 11d.A second aspect of the invention relates to the implementation of a pipe system 15 in the inlet zone 4, configured to evacuate to the outside air expelled at the circumference of the propeller 7 in the chamber 3. As illustrated on the figures 2 and 6 , the ends 16 of the blades 17 of the helix 7 constituting the circumferential contour of said helix 7, are spaced relative to the inner wall 3a of the circulation chamber 3, for reasons of mounting between said parts. This causes the existence of a circumferential space 18 between the helix 7 and the inner wall 3a, as illustrated in FIG. figures 2 and 6 in which a pressure equilibrium occurs. Part of the air sucked is then discharged by the propeller 7 instead of being blown downstream of the circulation chamber 3, because of the existence of a strong pressure difference between the upstream side of the chamber. the propeller 7 and the downstream thereof. The pipe system 15 thus allows this air discharged outside the propeller 7 to be discharged outside rather than to be left in the circulation chamber 3, upstream of the propeller. This advantageously avoids that the discharge air generates turbulence in the inlet zone 4, which would have the disadvantage of disturbing the flow of air sucked and channeled through the fins 11a - 11b or 11a - 11d.

Ce système de canalisation 15 est de préférence mis en oeuvre sur le culot 12, grâce à la présence d'un conduit d'évacuation 19, agencé autour du conduit central 14. Ce conduit d'évacuation 19 est agencé à la circonférence de la zone d'entrée 4, à proximité de l'espace circonférentiel 18, comme cela est illustré en figures 2 et 6 pour les deux variantes de réalisation du sèche-cheveux 1. Ainsi l'air refoulé par l'hélice 7 s'évacue à l'extérieur par ce conduit d'évacuation 19 plutôt que de générer des turbulences dans la chambre de circulation 3, en amont de l'hélice 7, ce qui évite de perturber l'écoulement convenable de l'air aspiré par les canaux 13a - 13b ou 13a - 13d.This ducting system 15 is preferably implemented on the base 12, thanks to the presence of a discharge duct 19, arranged around the central duct 14. This duct 19 is arranged at the circumference of the zone. 4, near the circumferential space 18, as illustrated in FIG. figures 2 and 6 for the two embodiments of the hair dryer 1. Thus the air discharged by the propeller 7 is evacuated outside by this exhaust duct 19 rather than generating turbulence in the circulation chamber 3, in upstream of the helix 7, which avoids disrupting the proper flow of air sucked by the channels 13a - 13b or 13a - 13d.

La paroi interne 19a du conduit d'évacuation 19 est constituée par la paroi 14a du conduit central 14, et présente donc la forme d'une chicane, comme cela est expliqué précédemment. La paroi externe 19b du conduit d'évacuation 19 présente également une forme en chicane qui est plus prononcée sur le mode de réalisation des figures 5 et 6 que sur le mode de réalisation des figures 1 à 4, comme cela apparaît au regard desdites figures. Dans les deux cas, les formes des parois interne 19a et externe 19b permettent au conduit d'évacuation 19 de disposer d'une forme en chicane, laquelle permet avantageusement de casser la vitesse de l'air refoulé et s'évacuant à l'extérieur du conduit d'évacuation 19. Cela évite de perturber l'aspiration de l'air extérieur au travers des canaux 13a - 13c ou 13a - 13d. Cette forme en chicane du conduit d'évacuation 19 permet en outre de bloquer la ligne de visée dans la chambre de circulation 3, comme cela apparaît sur les figure 4 et 5 pour les deux variantes de réalisation, de manière semblable à l'effet produit par la configuration des ailettes 11a - 11b ou 11a - 11d. Ainsi, le conduit d'évacuation 19 permet également d'atténuer les nuisances sonores en forçant les ondes à rebondir sur les parois internes 19a et externe 19b dudit conduit.The inner wall 19a of the exhaust duct 19 is constituted by the wall 14a of the central duct 14, and thus has the form of a baffle, as explained above. The outer wall 19b of the exhaust duct 19 also has a baffle shape which is more pronounced on the embodiment of the Figures 5 and 6 that on the embodiment of the Figures 1 to 4 , as appears in the light of said figures. In both cases, the shapes of the inner 19a and outer 19b walls allow the exhaust duct 19 to have a baffle shape, which advantageously allows to break the speed of the discharged air and evacuating outside of the exhaust duct 19. This avoids disturbing the suction of the outside air through the channels 13a-13c or 13a-13d. This baffle shape of the evacuation duct 19 also makes it possible to block the line of sight in the circulation chamber 3, as appears on the figure 4 and 5 for the two embodiments, similar to the effect produced by the configuration of the fins 11a-11b or 11a-11d. Thus, the evacuation duct 19 also reduces the noise by forcing the waves to bounce on the inner walls 19a and outer 19b of said duct.

La forme en tulipe des ailettes 11a - 11b ou 11a - 11d permet de disposer de canaux 13a - 13c ou 13a - 13d dont les extrémités amont sont orientées sur les côtés du sèche-cheveux 1, et non selon son axe longitudinal X, comme cela apparaît notamment sur les figures 2 et 6. Cela permet d'aspirer l'air extérieur sur les côtés du sèche-cheveux 1. En outre, la forme en chicane du conduit d'évacuation 19 permet d'expulser l'air refoulé sur les côtés, à proximité des extrémités amont des canaux 13a - 13c ou 13a - 13d. Cela permet avantageusement d'aspirer à nouveau cet air refoulé dont la vitesse d'écoulement a été préalablement cassée lors de son évacuation.The tulip shape of the fins 11a-11b or 11a-11d makes it possible to have channels 13a-13c or 13a-13d whose upstream ends are oriented on the sides of the hair dryer 1, and not along its longitudinal axis X, as shown in FIG. appears in particular on figures 2 and 6 . This makes it possible to draw outside air on the sides of the hair dryer 1. In addition, the baffle shape of the exhaust duct 19 makes it possible to expel the air discharged on the sides, near the upstream ends of the channels. 13a-13c or 13a-13d. This advantageously allows to suck again this discharge air whose flow rate was previously broken during its evacuation.

Sur le mode de réalisation des figures 5 et 6, le culot 12 comprend trois pattes de maintien 20a, 20b, 20c agencées entres les ailettes 11a, 11b et la paroi 14a du conduit central 14, pour maintenir lesdites ailettes 11a, 11b avec un espacement régulier. Ces pattes de maintien 20a, 20b, 20c sont réparties uniformément autour du culot 12, comme illustré en figure 5. De telles pattes de maintien peuvent également être envisagées entre les ailettes 11a - 11d et la paroi 14a du conduit central 14, sur le mode de réalisation des figures 1 à 4.On the embodiment of Figures 5 and 6 , the base 12 comprises three retaining tabs 20a, 20b, 20c arranged between the fins 11a, 11b and the wall 14a of the central duct 14, to maintain said fins 11a, 11b with a regular spacing. These holding tabs 20a, 20b, 20c are distributed uniformly around the base 12, as illustrated in FIG. figure 5 . Such holding lugs may also be envisaged between the fins 11a-11d and the wall 14a of the central duct 14, in the embodiment of the invention. Figures 1 to 4 .

Sur le mode de réalisation des figures 1 à 4, des points de liaison 21a, 21b, par exemple trois ou quatre, sont mis en oeuvre entre la paroi interne 19a et la paroi externe 19b sur le culot 12, tel qu'illustré en figure 2, pour maintenir lesdits éléments en position l'un par rapport à l'autre. De tels points de liaison peuvent être envisagés sur le mode de réalisation des figures 5 et 6. De tels points de liaison peuvent également être envisagés entre les ailettes 11a - 11d et la paroi 14a, sur le mode de réalisation des figures 1 à 4, voire entre les ailettes 11a, 11b et la paroi 14a, sur le mode de réalisation des figures 5 et 6.On the embodiment of Figures 1 to 4 , connection points 21a, 21b, for example three or four, are implemented between the inner wall 19a and the outer wall 19b on the base 12, as illustrated in FIG. figure 2 to maintain said elements in position relative to one another. Such points of connection can be envisaged in the embodiment of the Figures 5 and 6 . Such connection points can also be envisaged between the fins 11a-11d and the wall 14a, on the embodiment of the Figures 1 to 4 , or even between the fins 11a, 11b and the wall 14a, on the embodiment of the Figures 5 and 6 .

Tel qu'illustré notamment sur les figures 2 et 6, l'extrémité amont 2a du corps 2 du sèche-cheveux 1 et l'extrémité aval 12a du culot 12 sont configurées pour permettre un assemblage amovible dudit culot 12, par exemple pour accéder à l'hélice 7. On peut prévoir un emboîtement de l'extrémité aval 12a du culot 12 sur l'extrémité amont 2a du corps 2, voire des doigts de maintien (non illustrés) permettant d'encliqueter l'extrémité aval 12a sur l'extrémité amont 2a.As illustrated in particular in figures 2 and 6 , the upstream end 2a of the body 2 of the hair dryer 1 and the downstream end 12a of the base 12 are configured to allow a removable assembly of said base 12, for example to access the propeller 7. It can provide a nesting of the downstream end 12a of the base 12 on the upstream end 2a of the body 2, or holding fingers (not shown) for snapping the downstream end 12a on the upstream end 2a.

Sur la variante de réalisation des figures 7 et 8, on retrouve des caractéristiques comparables à celles de la variante de réalisation des figures 1 à 4, mais avec six ailettes 11a-11f qui forment entrent-elles cinq canaux 13a-13f.On the variant embodiment of the Figures 7 and 8 , one finds characteristics comparable to those of the variant of realization of Figures 1 to 4 but with six fins 11a-11f that form between five channels 13a-13f.

Tout comme la variante des figures 5 et 6, la première tulipe 11a est configurée pour présenter un canal axial 13a qui débouche en regard du moyeu de l'hélice 7 mais qui est obturée à l'entrée du canal 13a par un bouchon 22.Just like the variant of Figures 5 and 6 , the first tulip 11a is configured to present an axial channel 13a which opens opposite the hub of the propeller 7 but which is closed at the inlet of the channel 13a by a plug 22.

Cependant, à la différence du mode de réalisation présenté sur les figures 1 à 3 et de la variante présentée aux figures 5 et 6, dans la variante présentée aux figures 7 et 8 la dernière ailette 11f vient au contact de la paroi 14a de manière à supprimer le système de canalisation 15 dans la zone d'entrée 4.However, unlike the embodiment presented on the Figures 1 to 3 and the variant presented to Figures 5 and 6 , in the variant presented to Figures 7 and 8 the last fin 11f comes into contact with the wall 14a so as to eliminate the ducting system 15 in the inlet zone 4.

A cet effet, dans cette variante la paroi 14a s'étend transversalement à l'axe longitudinal X jusqu'à atteindre la paroi de la dernière ailette 11f.For this purpose, in this variant the wall 14a extends transversely to the longitudinal axis X until it reaches the wall of the last fin 11f.

Ainsi, la dernière ailette 11f favorise uniquement l'introduction de l'air au travers du sixième canal 13f formé entre cette dernière ailette 11f et la cinquième ailette 13e.Thus, the last fin 11f only promotes the introduction of air through the sixth channel 13f formed between the latter fin 11f and the fifth fin 13e.

Dans cette variante, les ailettes 11a-11f présentent une disposition particulière dans laquelle plusieurs ailettes 11a-11e s'étendent à partir de plans transversaux différents.In this variant, the fins 11a-11f have a particular arrangement in which a plurality of fins 11a-11e extend from different transverse planes.

Ainsi, la première ailette 13a s'étend à partir d'un plan transversal plus éloigné de l'hélice que le plan transversal à partir duquel s'étend la deuxième ailette 13b.Thus, the first fin 13a extends from a transverse plane farther from the helix than the transverse plane from which extends the second fin 13b.

De même, la deuxième ailette 13b s'étend à partir d'un plan transversal plus éloigné de l'hélice que le plan transversal à partir duquel s'étend la troisième ailette 13c et ainsi de suite jusqu'à la cinquième ailette 11e.Similarly, the second fin 13b extends from a transverse plane farther from the helix than the transverse plane from which the third fin 13c extends and so on until the fifth fin 11e.

Seule la cinquième ailette 11e et la sixième ailette 11f s'étendent à partir d'un même plan transversal.Only the fifth fin 11e and the sixth fin 11f extend from the same transverse plane.

Cet agencement permet de former une zone 23 de volume déterminé située en regard du moyeu de l'hélice.This arrangement makes it possible to form a zone 23 of determined volume situated opposite the hub of the propeller.

La présence de cette zone 23 permet d'améliorer la performance de l'hélice.The presence of this zone 23 improves the performance of the helix.

En effet, la présence de cette zone 23 favorise la circulation de l'air entrant face au moyeu de l'hélice. Cet air peut ainsi rejoindre sans contrainte la zone utile de l'hélice, située plus à l'extérieur, sans devoir buter contre le moyeu de l'hélice.Indeed, the presence of this zone 23 promotes the flow of incoming air facing the hub of the propeller. This air can thus join without constraint the zone useful propeller, located further out, without having to abut against the hub of the propeller.

D'autres variantes sont envisageables sans sortir du cadre de l'invention. On pourrait par exemple prévoir un culot 12 comprenant uniquement les ailettes 11a - 11b ou 11a - 11d et le conduit central 14, dans ce cas le conduit d'évacuation 19 serait agencé directement sur le corps 2 au niveau de la zone d'entrée 4 de la chambre de circulation 3.Other variants are conceivable without departing from the scope of the invention. For example, it would be possible to provide a base 12 comprising only the fins 11a-11b or 11a-11d and the central duct 14, in this case the evacuation duct 19 would be arranged directly on the body 2 at the level of the inlet zone 4 of the circulation chamber 3.

Claims (14)

  1. Hairdryer (1) comprising an air circulation chamber (3) equipped with an inlet area (4) and an outlet area (5), an air circulation system (6) comprising a motor (8) and a fan (7) configured in the circulation chamber to draw outside air in through the inlet area and to convey this air from upstream to downstream, up to the outlet area, characterised in that it comprises at least two vanes (11a, 11b, 11c, 11d) arranged at the level of the inlet area, said vanes being configured in relation to one another and in relation to the inlet area to form air inlet channels (13a, 13b, 13c, 13d) oriented towards the fan, and to block the aiming lines parallel to a longitudinal axis of the circulation chamber towards the inside of the circulation chamber.
  2. Hairdryer (1) according to claim 1, wherein the vanes (11a, 11b, 11c, 11d) each have a tulip shape which opens towards the top and are interlocked with one another with a spacing between one another, so as to form said channels (13a, 13b, 13c, 13d), said vanes being configured to cover the inlet area (4) and to be covered at least partially successively following one another so as to block the aiming lines towards the inside of the circulation chamber (3).
  3. Hairdryer (1) according to claim 2, which comprises between two and ten tulips (11a, 11b, 11c, 11d).
  4. Hairdryer (1) according to claim 3, which comprises two or four tulips (11a, 11b, 11c, 11d).
  5. Hairdryer (1) according to one of claims 1 to 4, which comprises a lower part (or cap) (12) assembled with the circulation chamber (3) in the inlet area (4), the lower part comprising said at least two vanes (11a, 11b, 11c, 11d).
  6. Hairdryer (1) according to claim 5, wherein removable securing means are implemented between the circulation chamber (3) and the lower part (12) so as to make it possible to remove the lower part.
  7. Hairdryer (1) according to one of claims 5 or 6, wherein the lower part (12) comprises tabs for holding (20a, 20b, 20c) the vanes (11a, 11b, 11c, 11d) to one another.
  8. Hairdryer (1), according to one of claims 1 to 7, which comprises a conduit system (15) configured in the inlet area (4) to evacuate, towards the outside, the air repelled to the circumference (16) of the fan (7) in the circulation chamber (3).
  9. Hairdryer (1) according to claim 8, wherein the conduit system (15) comprises a conduit (19) having a revolution shape, arranged in the inlet area (4) adjoining the inner wall (3a) of the circulation chamber (3).
  10. Hairdryer (1) according to one of claims 8 or 9, wherein the conduit system (15) comprises means for reducing the speed of the air repelled towards the outside.
  11. Hairdryer (1) according to one of claims 8 to 10, wherein the conduit system (15) comprises means for reducing sound pollution.
  12. Hairdryer (1) according to one of claims 8 to 11, wherein the conduit system (15) consists of a conduit (19) having a revolution shape, said conduit having, in a longitudinal cross-sectional plane, a chicane shape.
  13. Hairdryer (1) according to one of claims 8 to 12, connected to one of claims 5 to 7, wherein the lower part (12) comprises the conduit system (15).
  14. Hairdryer (1) according to one of claims 8 to 13, wherein the at least two vanes (11a, 11b, 11c, 11d) and the conduit system (15) are configured such that the air repelled by said conduit system is drawn in again by the fan (7) through air inlet channels (13a, 13b, 13c, 13d).
EP16744818.2A 2015-07-28 2016-07-08 Hair dryer with an duct air inlet having enhanced acoustic performance Active EP3328238B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1557227A FR3039375B1 (en) 2015-07-28 2015-07-28 HAIRDRYER WITH AIR INTAKE PIPING WITH OPTIMIZED ACOUSTIC PERFORMANCE
PCT/FR2016/051763 WO2017017331A1 (en) 2015-07-28 2016-07-08 Hair dryer comprising an air inlet channel having an optimised acoustic performance

Publications (2)

Publication Number Publication Date
EP3328238A1 EP3328238A1 (en) 2018-06-06
EP3328238B1 true EP3328238B1 (en) 2019-05-15

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EP16744818.2A Active EP3328238B1 (en) 2015-07-28 2016-07-08 Hair dryer with an duct air inlet having enhanced acoustic performance

Country Status (9)

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EP (1) EP3328238B1 (en)
KR (1) KR102585671B1 (en)
CN (1) CN107847029B (en)
BR (1) BR112018001552B1 (en)
ES (1) ES2729955T3 (en)
FR (1) FR3039375B1 (en)
RU (1) RU2727535C2 (en)
TR (1) TR201907872T4 (en)
WO (1) WO2017017331A1 (en)

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Publication number Priority date Publication date Assignee Title
KR102134484B1 (en) * 2019-01-22 2020-07-16 유태승 Low noise type hair dryer

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BR112018001552B1 (en) 2022-08-30
RU2727535C2 (en) 2020-07-22
WO2017017331A1 (en) 2017-02-02
BR112018001552A2 (en) 2018-09-18
EP3328238A1 (en) 2018-06-06
CN107847029A (en) 2018-03-27
RU2018106488A (en) 2019-08-28
RU2018106488A3 (en) 2019-12-10
KR102585671B1 (en) 2023-10-06
CN107847029B (en) 2021-01-01
KR20180034522A (en) 2018-04-04
TR201907872T4 (en) 2019-06-21
FR3039375B1 (en) 2017-09-01
FR3039375A1 (en) 2017-02-03
ES2729955T3 (en) 2019-11-07

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