EP2512282B1 - Haartrockner mit passivem schalldämpfersystem - Google Patents

Haartrockner mit passivem schalldämpfersystem Download PDF

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Publication number
EP2512282B1
EP2512282B1 EP10809289.1A EP10809289A EP2512282B1 EP 2512282 B1 EP2512282 B1 EP 2512282B1 EP 10809289 A EP10809289 A EP 10809289A EP 2512282 B1 EP2512282 B1 EP 2512282B1
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EP
European Patent Office
Prior art keywords
air
fuselage
hair dryer
internal
fan
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.)
Active
Application number
EP10809289.1A
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English (en)
French (fr)
Other versions
EP2512282A2 (de
Inventor
Christian Carme
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technofirst SA
Original Assignee
Technofirst SA
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Filing date
Publication date
Application filed by Technofirst SA filed Critical Technofirst SA
Publication of EP2512282A2 publication Critical patent/EP2512282A2/de
Application granted granted Critical
Publication of EP2512282B1 publication Critical patent/EP2512282B1/de
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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
    • A45D20/22—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
    • 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 general field of hair dryers.
  • a hair dryer typically includes a tapered plastic shell between a rear end and a front end through which the air set in motion and heated within the hair dryer.
  • the plastic shell thus defines at least one air inlet and one air outlet and is intended to accommodate at least one motor and one fan.
  • the axis of the fan is carried by an internal structure fixed in the central part of the fuselage. It is known that the operation of a hair dryer generates several types of noise among which the noise related to the flow of air flow and noise related to the operation of the turbine used to create the air flow.
  • a hair dryer thus comprises a plurality of sound sources respectively related to the turbulence of the flow of the hot air flow to the noise of the turbine, in particular the rotation of the blades and to the noise related to the vibration of the engine coupled to the hull of the dryer -hair.
  • the noise related to the turbine is composed of sound lines correlated to the speed of rotation of the turbine and the number of its blades.
  • the sound spectrum related to the vibration of the engine / hull link is also a line noise.
  • the invention is concerned with the use of an acoustic silencer in a hair dryer, this acoustic silencer making it possible to obtain a passive sound reduction, mainly on the noise related to the flow. air and partly on the noise associated with the turbine.
  • Passive noise reduction devices are known in other fields. These devices use foams or baffles of rock wool or glass. Both these means can contribute to reducing some of the noise generated by the operation of the turbine, generally the part spectral only, as it turns out that these means are inappropriate for dealing with airflow noises.
  • the finesse of the grid of this grid makes it possible to filter a certain number of sound frequencies. Such a grid reduces in particular the sharp whistling of the turbine.
  • the acoustic grid only allows the treatment of noise on the air inlet.
  • the noise transmitted by the air flow and the turbine at the outlet is therefore not taken into consideration.
  • the main purpose of the present invention is therefore to overcome the disadvantages encountered in known passive sound reduction solutions and to make it possible to implement a passive sound reduction within a hair dryer by providing a hair dryer according to the claim 1.
  • the invention therefore proposes to provide the hair dryer, by conformation of its shell, a path between the air inlet and the internal structure carrying the fan longer than the physical distance observed between the rear end of the hair dryer and the internal structure carrying the fan.
  • the invention is therefore interested in treating, as a priority, the noise conveyed by the fluid before the noise radiated by the shell.
  • the noise is generally conveyed by the movement of air in the cowling which is necessarily open at a first end to let in air and at another end to let it out. The noise thus comes out in a privileged way through these openings.
  • the noise is also treated in a more global manner.
  • This acoustic distance being achieved through a certain conformation of the plastic shell at the air inlet to the internal structure supporting the fan and / or the axis of the fan and not with a grid acoustic cutting flow, it allows a reduction in sound with the least possible loss of load.
  • the sound reduction related to the use of such a passive silencer consisting in using a roll-type plastic shell to obtain a reduction of the acoustic radiation of turbulence related to the flow of the hot air flow as well as the turbine used to create this airflow, it makes it possible to process the noises emitted in the spectral zone comprising the mid frequencies and the acute frequencies.
  • a flow must be as laminar as possible to avoid flow problems.
  • the least roughness or convergent / divergent type of form creates turbulence. When turbulence is created then "whirlwind explosion" creates noise.
  • the size of the vortices is correlated to the frequencies emitted: the bigger they are, the more they create low frequencies.
  • the profiling of the air flows according to the invention decreases the swirls and improves the acoustics in addition to lengthening the distance. It is the combined effect of these two principles that improves the acoustics of the hair dryer.
  • the air inlet is on the periphery of the fuselage near the front end of the fuselage in a direction opposite to the air propelled by the hair dryer.
  • the air inlet is located, as the air outlet on the side of the front end of the fuselage of the hair dryer allows a significant extension of the acoustic path traveled by the air.
  • the hair dryer then has no opening on the back, which ensures the protection of the user. It should be noted here that the blown stream must remain predominant on the intake stream in order to avoid the aspiration of elements located near the air outlet, in particular the hair.
  • the plastic shell comprises the internal fuselage which opens the air outlet at the front end, this first internal fuselage being intended to be partially covered on its rear part by the fuselage envelope of larger dimensions and carried by the internal structure bearing the axis of the fan, the front end of the fuselage envelope materializing the air inlet of the hair dryer between the two internal and casing fuselages, on the periphery of the internal fuselage.
  • the lengthening of the acoustic path then obtained is particularly important since it is possible to bring air to circulate all along the internal fuselage before it is re-shifted in the other direction in order to stand out, once heated. , from the inside of the internal fuselage.
  • the conformation of the plastic shell is advantageously further profiled to reduce the creation of turbulence and thus reduce the noise associated with their presence in the stream.
  • the calculation of such a profile is made by studying the flow lines which must then be as laminar as possible.
  • the exact conformation of the plastic shell will advantageously calculated to optimally reduce turbulence.
  • the plastic shell then combines two functions for a single conformation, the first being the elongation of the acoustic path and the second, reducing the creation of turbulence.
  • the conformation of the plastic shell is made by molding.
  • This implementation makes it possible to ensure a very good cohesion of all the paths in which the air circulates and an absence of deterioration of the materials since the paths are directly made with the plastic of the plastic shell.
  • the molding allows a very large shape latitude compatible both with the optimization of the conformation of the shell for the lengthening of the acoustic path and the reduction of turbulence.
  • the hair dryer comprises means for preheating air on the elongate acoustic path traveled by the air.
  • Such preheating means may be implemented for example in the wall of the internal fuselage.
  • the figure 1 schematically represents a first embodiment of a hair dryer 1 comprising a plastic shell 10 and a handle 11 forming a handle.
  • the plastic shell 10 comprises an air inlet EA and an air outlet SA.
  • the air inlet EA illustrated by an arrow is at the end of the handle handle 11.
  • a space 12 also called suction chamber, preceding an internal structure 13 carrying a fan not shown which pulses the air to the air outlet SA also illustrated by an arrow.
  • heating means 20 are placed in the path of the air pulsed by the fan.
  • the motor is advantageously placed in a plastic cap noted 14 present at the rear end of the hair dryer 1.
  • the Figures 2A and 2B represent two variants of the same second embodiment of a hair dryer.
  • the hair dryer 1 here comprises a tapered plastic shell 10 with an EA air inlet and an SA air outlet.
  • the air intake EA is placed at the rear end of the fuselage 10.
  • a baffle is directly shaped by molding of the plastic shell itself. This baffle is made by specific molding of a profile on the inner face of the fuselage 10 and a complementary profile at an internal protrusion of the plastic shell 10 carried by the internal structure 13 carrying the fan, these two moldings being made with a symmetry of revolution.
  • a revolution symmetry lip 15 facing the rear of the fuselage.
  • This lip 15 has a complementary profile of a baffle front 16, acting as a protective cap at the rear end of the fuselage 10.
  • the baffle front 16 is connected by an axial element 17 to the internal structure 13 which carries the fan.
  • the baffle front 16 constitutes a kind of partial plug of the air intake EA at the rear of the fuselage 10.
  • the annular air inlet path obtained between the lip 15 and the front 16 is therefore in a baffle since the presence of the baffle front 16 forces the air to abut on the periphery of the lip 15 at its connection to the fuselage 10. Then, the air is brought back to the rear of the fuselage 10 by the lip 15 before being propelled into a space 12, also called suction chamber, preceding the internal structure 13.
  • the realization presented on the Figure 2B has a lip 15 oriented in the opposite direction to the lip 15 presented on the Figure 2A or a lip 15 of symmetry of revolution oriented towards the front of the hair dryer.
  • a baffle front 16 then has the complementary profile.
  • the presence of the lip 15 pushes the air to abut in an annular bottom formed on the front of the baffle 16.
  • the profile of the baffle front 16 complementary to the profile of the lip 15 causes the air to flow to the rear of the fuselage 10 so that it comes into contact with the annular bottom of the lip 15 located at the periphery thereof at the level of the attachment of the lip 15 to the fuselage.
  • the air is propelled back forwards within the space 12, called the suction chamber, preceding the internal structure 13.
  • the 2B configuration is particularly powerful because it creates little pressure loss and very well calms turbulence. Indeed, it makes it possible to obtain a well laminar flow.
  • the figure 3 represents a third embodiment of a hair dryer according to which the plastic cap 14, placed at the rear end of the plastic shell 10, is pierced with at least one spiral channel 18 and preferably several spirals here four spirals.
  • the EA air inlet is then constituted by the entry or entries of this or these spirals.
  • the air then flowing in its spirals sees its acoustic path extended with respect to the direct rectilinear path of an inlet placed at the rear end of the fuselage 10 and the space 12.
  • the circulation of the air in the spirals 18 is a laminar flow of air which avoids the creation of turbulence and the associated noise. Moreover, the multiplication of the number of spirals makes it possible to limit the losses of load. This makes it possible to use a small spiral channel diameter while ensuring that the pressure losses are not significant. In any case, use of a spiral channel diameter adapted with a suitable number of spirals makes it possible to observe no loss of load or to observe minimum pressure drops.
  • a motor actuating the fan will be placed within the cap 14, possibly on suspensions, for example passive dampers ("silent blocks” in English) to decouple the turbine from the plastic shell and thus avoid the resonances.
  • the motor housing will advantageously decoupled from the body of the hair dryer, here constituted by the plastic shell. This decoupling is done advantageously by suspension.
  • the use of passive dampers at the crankcase retention points thus reduces the solid noise, also felt at the handle.
  • annular seal around the internal structure 13 carrying the fan or around the fan itself to decouple the vibrations of the fan and the shell 10.
  • heating means for example resistors may also be placed near the spiral channels on the path of air.
  • the figure 4 represents an embodiment of the invention in which the EA air inlet is distributed over the contour of an internal fuselage 10a around which is sheathed an envelope fuselage 10b.
  • the fuselage 10b is connected to the fuselage 10a through the internal structure 13 carrying the fan.
  • the air travels the distance between the inlet EA and an internal space 12, constituting a suction chamber delimited at the rear of the internal fuselage 10a.
  • the air circulating on the periphery of the internal fuselage 10a passes at the rear end of the hair dryer before entering the space 12, passing through the fan 13 and before being expelled from the dryer hair by the air outlet SA by being passed over the heating means 20.
  • the figure 5 shows an improvement in the way in which Figures 2A and 2B .
  • this isolation chamber of the engine 19 allows, since the baffle front 16 is mounted partially suspended thanks to the axial structure 17 with respect to the plastic shell, to isolate the engine vibrations thereof.
  • this isolation chamber 19 is connected to the space 12 preceding the internal structure 13, also called the suction chamber, by heat pipes. This allows not only to cool the engine but also to preheat the air.
  • the shell 10 is made integrally between the elements forming the fuselage and the elements making the internal structure 13 carrying the fan.
  • these molded elements are made separately and then assembled to form a hair dryer as shown in the figures shown in that it does not depart from such an embodiment of the principles of the invention.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Cleaning And Drying Hair (AREA)
  • Hair Curling (AREA)

Claims (6)

  1. Tragbarer Haartrockner (1), enthaltend eine stromlinienförmige Kunststoffschale (10) zwischen einem hinteren Ende und einem vorderen Ende, über das die durch den Haartrockner (1) in Bewegung versetzte und erwärmte Luft austritt, wobei diese Kunststoffschale (10) einen einzigen Lufteintritt (EA), einen Luftaustritt (SA) zum Ausblasen der Luft definiert und dazu bestimmt ist, wenigstens einen Motor und ein Gebläse aufzunehmen, dessen Achse durch eine im mittleren Teil des Rumpfes (10) befestigte innere Struktur (13) getragen ist, wobei die Kunststoffschale (10) derart ausgestaltet ist, dass die gesamte über den Luftaustritt (SA) ausgestoßene Luft einen Luftweg zwischen dem Lufteintritt (EA) und der das Gebläse tragenden inneren Struktur (13) durchläuft, der länger ist als die zwischen dem hinteren Ende des Haartrockners und der das Gebläse tragenden inneren Struktur (13) betrachtete physische Strecke, wobei der Rumpf (10) einen inneren Rumpf (10a) und einen Mantelrumpf (10b) umfasst,
    wobei der Lufteintritt (EA) am Umfang des Rumpfes (10) in der Nähe des vorderen Endes des Rumpfes (10) in einer zu der durch den Haartrockner (1) angetriebenen Luft entgegengesetzten Richtung erfolgt, wobei der Eintritt der Luft über die Kontur des inneren Rumpfes (10a), um den herum der Mantelrumpf (10b) angeordnet ist, verteilt ist,
    dadurch gekennzeichnet, dass der Lufteintritt (EA) ringförmig und gegenüber dem Luftaustritt (SA) axial zurückgesetzt ist.
  2. Haartrockner (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Kunststoffschale (10) den inneren Rumpf (10a) umfasst, aus dem der Luftaustritt (SA) am vorderen Ende ausmündet, wobei dieser erste innere Rumpf (10a) dazu bestimmt ist, an seinem hinteren Teil durch den Mantelrumpf (10b), welcher größere Abmessungen aufweist und durch die die Achse des Gebläses tragende innere Struktur (13) getragen ist, teilweise bedeckt zu sein, wobei das vordere Ende des Mantelrumpfes (10b) den Lufteintritt (EA) des Haartrockners (1) zwischen den beiden Rümpfen, dem inneren (10a) und dem Mantelrumpf (10b), am Umfang des inneren Rumpfes (10a) schafft.
  3. Haartrockner (1) nach Anspruch 2, dadurch gekennzeichnet, dass die Luft die Strecke zwischen dem Eintritt (EA) und einem eine Ansaugkammer bildenden Innenraum (12), welcher am hinteren Teil des inneren Rumpfes (10a) begrenzt ist, zurücklegt.
  4. Haartrockner (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Gestaltung der Kunststoffschale (10) durch Formen vollzogen wird.
  5. Haartrockner (1) nach Anspruch 4, dadurch gekennzeichnet, dass die Schale (10) zwischen den Elementen, die den Rumpf bilden, und den Elementen, die die das Gebläse tragende innere Struktur (13) bilden, einstückig ausgebildet ist.
  6. Haartrockner (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass er Mittel zum Vorerwärmen der Luft umfasst, die auf dem von der Luft zurückgelegten langgestreckten Schallweg angeordnet sind.
EP10809289.1A 2009-12-18 2010-12-17 Haartrockner mit passivem schalldämpfersystem Active EP2512282B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0959217A FR2954055B1 (fr) 2009-12-18 2009-12-18 Seche-cheveux a systeme silencieux passif
PCT/FR2010/052775 WO2011073585A2 (fr) 2009-12-18 2010-12-17 Seche-cheveux a systeme silencieux passif

Publications (2)

Publication Number Publication Date
EP2512282A2 EP2512282A2 (de) 2012-10-24
EP2512282B1 true EP2512282B1 (de) 2018-04-25

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EP10809289.1A Active EP2512282B1 (de) 2009-12-18 2010-12-17 Haartrockner mit passivem schalldämpfersystem

Country Status (11)

Country Link
US (1) US8893400B2 (de)
EP (1) EP2512282B1 (de)
JP (1) JP2013514112A (de)
CN (1) CN102821644A (de)
AU (1) AU2010332630A1 (de)
BR (1) BR112012014871B1 (de)
CA (1) CA2784056A1 (de)
FR (1) FR2954055B1 (de)
MX (1) MX2012007039A (de)
RU (1) RU2012127881A (de)
WO (1) WO2011073585A2 (de)

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US8893400B2 (en) 2014-11-25
FR2954055B1 (fr) 2012-01-27
WO2011073585A2 (fr) 2011-06-23
FR2954055A1 (fr) 2011-06-24
AU2010332630A1 (en) 2012-06-21
CN102821644A (zh) 2012-12-12
US20120266484A1 (en) 2012-10-25
RU2012127881A (ru) 2014-01-27
CA2784056A1 (fr) 2011-06-23
JP2013514112A (ja) 2013-04-25
EP2512282A2 (de) 2012-10-24
BR112012014871A2 (pt) 2016-03-29
BR112012014871B1 (pt) 2020-05-19
WO2011073585A3 (fr) 2011-09-09

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