EP3328237B1 - Seche-cheveux avec un conduit de sortie d'air a effet coanda - Google Patents

Seche-cheveux avec un conduit de sortie d'air a effet coanda Download PDF

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Publication number
EP3328237B1
EP3328237B1 EP16744816.6A EP16744816A EP3328237B1 EP 3328237 B1 EP3328237 B1 EP 3328237B1 EP 16744816 A EP16744816 A EP 16744816A EP 3328237 B1 EP3328237 B1 EP 3328237B1
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EP
European Patent Office
Prior art keywords
hair dryer
channel
air
neck
duct
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
EP16744816.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3328237A1 (fr
Inventor
Valentin JAVELLE
Nicolas Lauchet
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.)
SEB SA
Original Assignee
SEB SA
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Publication date
Application filed by SEB SA filed Critical SEB SA
Publication of EP3328237A1 publication Critical patent/EP3328237A1/fr
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Publication of EP3328237B1 publication Critical patent/EP3328237B1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00—Hair drying devices; Accessories therefor
    • A45D20/04—Hot-air producers
    • A45D20/08—Hot-air producers heated electrically
    • A45D20/10—Hand-held drying devices, e.g. air douches
    • A45D20/12—Details thereof or accessories therefor, e.g. nozzles, stands

Definitions

  • the present invention relates to the field of hair dryers and aims to provide significant drying and feeling performance, while reducing the noise of the appliance.
  • hair dryers have included 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 draws the air from outside through the inlet zone then conveys this air into the circulation chamber, from upstream to downstream, passing through the heating element, the more or less heated air then being blown outside through the exit zone, so as to dry the hair.
  • the hair dryer configured to amplify the output air flow.
  • the hair dryer includes an outlet head configured to create a Coanda effect producing an acceleration of the air flow and to increase this air flow.
  • the flow of air at the outlet is perpendicular to the flow of air in the circulation chamber, which imposes a significant power of the circulation system and high speed operation of the motorization equipping said circulation system, so that the Coanda effect can be effective.
  • This design therefore generates significant energy consumption and noise pollution, problems frequently encountered with prior hair dryers, whatever their designs.
  • the present invention overcomes these drawbacks of prior hair dryers, and aims in particular to optimize the implementation of a Coanda effect in the air outlet zone.
  • the invention relates to a hair dryer which comprises an air circulation chamber provided with an inlet zone and an outlet zone.
  • the hair dryer also includes an air circulation system and a heating element which are arranged in the circulation chamber.
  • the circulation system is configured to draw air from the outside, through the inlet zone, then to convey this air into the circulation chamber, from upstream to downstream, passing through the heating element, and finally to blow the more or less heated air to the outside, through the outlet zone.
  • the hair dryer comprises, as is known, means for adjusting the temperature of the heating element to modify the temperature of the air blown out at the outlet and means for adjusting the speed of air circulation in the chamber.
  • circulation chamber in particular by acting on the speed of rotation of a motor driving a propeller.
  • the hair dryer comprises a duct arranged in the extension of the circulation chamber at the level of the exit zone.
  • the circulation chamber and the duct are arranged along the same longitudinal axis.
  • the duct has an upstream end, a downstream end and a neck arranged between said upstream and downstream ends. More precisely, the neck corresponds to the internal contour of the duct where the cross section is minimal.
  • the first portion of the duct, arranged between the upstream end and the neck has an angle of descent with respect to the longitudinal axis of the circulation chamber, of between 40 ° and 88 °. The first portion thus exhibits a continuous narrowing of the cross section of the duct from the upstream end to the neck.
  • the descent angle corresponds to the maximum angle adopted by the first portion of the duct with respect to the longitudinal axis.
  • the second portion of the duct arranged between the neck and the downstream end, has a reopening angle with respect to said longitudinal axis, between 1.5 ° and 3.5 °.
  • the second portion thus presents a continuous widening of the cross section of the duct from the neck to the downstream end.
  • the change from narrowing to widening of the cross section of the duct produces a Coanda effect at the neck.
  • the neck, connecting said first and second portions of the duct is of curved shape, preferably of circular shape, configured to promote the creation of this Coanda effect.
  • the Coanda effect produced at the neck generates an acceleration of the air leaving the duct.
  • the reopening angle allows an increase in the section of the duct in the second portion located between the downstream end and the neck, which generates an increase in the air flow at the outlet of the duct.
  • the descent angle is 82 °.
  • the reopening angle is preferably 2.5 °.
  • the duct has a circular cross section.
  • the neck has a reduction in diameter relative to the downstream end which is between 2 mm and 4 mm.
  • this reduction in diameter is 2 mm.
  • the heating element is spaced from the neck of the duct by a distance of between 0 mm and 5 mm.
  • the heating element enters the zone of convergence of the neck of the duct, corresponding to a zero distance, the Coanda effect is greatly reduced.
  • said distance is 4 mm, which allows optimization of the Coanda effect.
  • a grid is arranged between the heating element and the duct.
  • the presence of such a grid is intended to prevent any direct contact of the heating element with the fingers, by introducing them through the duct.
  • removable connection means are arranged between the circulation chamber and the duct so as to allow the removal of said duct, for example to replace the duct of circular cross section with another similar one. of different dimensions or by another of rectangular or triangular cross section.
  • the hair dryer 1 comprises a body 2 which has a more or less cylindrical shape making it possible to constitute a circulation chamber 3, which has a longitudinal axis X.
  • This circulation chamber 3 comprises an inlet zone 4 and a flow zone. outlet 5.
  • a circulation system 6 is arranged in this circulation chamber 3, which makes it possible to suck the 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 making it possible to drive the propeller 7 in rotation, and a rectifier 9 arranged downstream of the propeller 7 and making it possible to channel the air at the outlet of this propeller 7.
  • the hair dryer 1 also comprises a heating element 10 arranged in downstream of the rectifier 9, which makes it possible to heat the air in the e downstream of the circulation chamber 3, before its expulsion through the outlet zone 5.
  • the hair dryer 1 also comprises means for controlling and adjusting the motor 8 and the heating element 10 (not shown) which make it possible to individually modify 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, so they are not detailed in the rest of the description.
  • the invention relates in particular to a duct 11, illustrated on figures 1 to 3 .
  • the duct 11 is arranged in the extension of the outlet zone 5 of the circulation chamber 3, along the longitudinal axis X, as illustrated in figures 1 and 2 .
  • the duct 11 is preferably circular in shape, and comprises an upstream end 12 and a downstream end 13.
  • the section of the upstream end 12 of the duct 11 corresponds to the section of the outlet zone 5 of the circulation chamber 3.
  • the duct 11 has a shape of revolution with a neck 14 which defines on said duct 11 an upstream portion 15 and a downstream portion 16, illustrated in figure 3 .
  • the configuration of the duct 11, as shown in the figures 1 to 3 makes it possible to subject the air leaving the circulation chamber 3, to a Coanda effect, a phenomenon of fluid mechanics known per se.
  • the air leaving the circulation chamber 3, at the level of the outlet zone 5, is subjected to a reduction in passage section due to the presence of the neck 14, which forces the air to flow at an angle corresponding to a descent angle ⁇ of the upstream portion 15, illustrated in figure 3 .
  • the outgoing air is therefore compressed up to the passage section of the neck 14. Once the neck has been passed, this outgoing air expands following the increase in the passage section to the downstream end 13 of the duct 11.
  • the outgoing air expands and then flows at an angle corresponding to an angle of reopening ⁇ of the downstream portion 16, illustrated in figure 3 .
  • the descent angle ⁇ and the reopening angle ⁇ are defined with respect to the longitudinal axis X on the figure 3 .
  • This geometry of the duct 11 makes it possible to generate a suction of the air leaving towards the downstream end 13, which increases the speed of the air at the outlet.
  • this geometry of the duct 11 makes it possible to jointly increase the air flow rate at the outlet.
  • the dimensions of the duct 11 are variable and partly adapted to those of the circulation chamber 3, the passage section of the upstream end 12 of said duct 11 corresponding to the passage section of the outlet zone 5 of said circulation chamber 3, and the angles of descent ⁇ and of reopening ⁇ of the duct 11 being chosen from the aforementioned value ranges.
  • the Applicant has observed that it is possible to further improve the speed of the air leaving the duct while maintaining an excellent flow rate, by reducing the diameter D1 at the level of the neck 14 relative to the diameter D2 at the level of the downstream end 13, with a value between 2 mm and 4 mm, preferably 2 mm.
  • the diameter D2 at the level of the downstream end 13 of the duct is chosen between 30 mm and 40 mm, and is preferably equal to 32 mm, which also helps to blow the air out at an optimized speed, while maintaining an excellent flow.
  • the downstream end 17 of the heating element 10 is spaced from the neck 14 of the duct 11 by a distance d which is between 0 mm and 5 mm, which influences the desired Coanda effect.
  • this distance d is 4 mm to optimize this Coanda effect.
  • the hair dryer 1 comprises a grid 18 which is arranged downstream of the heating element 10 in the circulation chamber 3. This grid 18 prevents any contact with the heating element 10.
  • the duct 11 is circular in shape. However, it is possible to envisage a section of square, rectangular or triangular shape for the duct 11, or even another, while retaining a descent angle ⁇ and a reopening angle ⁇ as provided for the embodiment of the figures 1 to 3 .
  • the duct 11 remains permanently attached to the circulation chamber 3.
  • removable connection means can be provided between the downstream end 19 of the circulation chamber 3 and the upstream end 12 of the duct 11, for example an interlocking or a snap-fit system between said downstream 19 and upstream 12 ends, so as to allow the duct 11 to be dismantled for its replacement by another of a different configuration remaining under the cover of the invention.

Landscapes

  • Cleaning And Drying Hair (AREA)
EP16744816.6A 2015-07-28 2016-07-08 Seche-cheveux avec un conduit de sortie d'air a effet coanda Active EP3328237B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1557226A FR3039377B1 (fr) 2015-07-28 2015-07-28 Seche-cheveux avec un conduit de sortie d'air a effet coanda
PCT/FR2016/051761 WO2017017330A1 (fr) 2015-07-28 2016-07-08 Seche-cheveux avec un conduit de sortie d'air a effet coanda

Publications (2)

Publication Number Publication Date
EP3328237A1 EP3328237A1 (fr) 2018-06-06
EP3328237B1 true EP3328237B1 (fr) 2020-11-18

Family

ID=55411448

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16744816.6A Active EP3328237B1 (fr) 2015-07-28 2016-07-08 Seche-cheveux avec un conduit de sortie d'air a effet coanda

Country Status (8)

Country Link
EP (1) EP3328237B1 (ko)
KR (1) KR102585672B1 (ko)
CN (1) CN107847031B (ko)
BR (1) BR112018001555B1 (ko)
ES (1) ES2837131T3 (ko)
FR (1) FR3039377B1 (ko)
RU (1) RU2712366C1 (ko)
WO (1) WO2017017330A1 (ko)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11653737B1 (en) 2021-11-12 2023-05-23 Sharkninja Operating Llc Hair care appliance
USD1021238S1 (en) 2022-06-02 2024-04-02 Sharkninja Operating Llc Hair care appliance

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3111676B1 (fr) 2020-06-19 2022-12-16 Seb Sa Hélice pour appareil soufflant comprenant des canaux radiaux de passage d’air
FR3111526B1 (fr) 2020-06-19 2022-06-24 Seb Sa Sèche-cheveux comprenant des boitiers externe et interne séparés par des dispositifs annulaires d’isolation.
FR3111527B1 (fr) 2020-06-19 2022-07-29 Seb Sa Sèche-cheveux comportant un support amortisseur

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3598928B2 (ja) * 2000-01-27 2004-12-08 松下電工株式会社 ヘアードライヤー
FR2817450B1 (fr) * 2000-12-06 2003-02-14 Seb Sa Seche-cheveux a dispositif de variation de la section de sortie du flux d'air
US6957500B2 (en) * 2002-11-01 2005-10-25 Wahl Clipper Corporation Attachment for handheld dryer
EP1433401B1 (en) * 2002-12-27 2008-03-05 Matsushita Electric Works, Ltd. Hair dryer with minus ion generator
JP4671302B2 (ja) * 2007-09-13 2011-04-13 九州日立マクセル株式会社 収束ノズルを備えたヘアードライヤー
GB201020847D0 (en) * 2010-12-08 2011-01-19 Jemella Ltd A hair dryer
KR101229109B1 (ko) * 2011-01-21 2013-02-05 (주)엠파워텍 헤어 드라이어
FR2982747B1 (fr) * 2011-11-18 2014-01-10 Seb Sa Seche-cheveux avec ailettes concentriques
CN202874233U (zh) * 2012-10-29 2013-04-17 蒋道法 一种护发吹风机

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11653737B1 (en) 2021-11-12 2023-05-23 Sharkninja Operating Llc Hair care appliance
US11832700B2 (en) 2021-11-12 2023-12-05 Sharkninja Operating Llc Hair care appliance
USD1021238S1 (en) 2022-06-02 2024-04-02 Sharkninja Operating Llc Hair care appliance
USD1028352S1 (en) 2022-06-02 2024-05-21 Sharkninja Operating Llc Hair dryer concentrator
USD1028523S1 (en) 2022-06-02 2024-05-28 Sharkninja Operating Llc Hair care accessory

Also Published As

Publication number Publication date
RU2712366C1 (ru) 2020-01-28
FR3039377B1 (fr) 2017-09-01
CN107847031A (zh) 2018-03-27
KR102585672B1 (ko) 2023-10-06
KR20180034531A (ko) 2018-04-04
EP3328237A1 (fr) 2018-06-06
CN107847031B (zh) 2020-11-20
BR112018001555B1 (pt) 2022-07-05
FR3039377A1 (fr) 2017-02-03
BR112018001555A2 (pt) 2018-09-18
WO2017017330A1 (fr) 2017-02-02
ES2837131T3 (es) 2021-06-29

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