EP3328237A1 - 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 coandaInfo
- Publication number
- EP3328237A1 EP3328237A1 EP16744816.6A EP16744816A EP3328237A1 EP 3328237 A1 EP3328237 A1 EP 3328237A1 EP 16744816 A EP16744816 A EP 16744816A EP 3328237 A1 EP3328237 A1 EP 3328237A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hair dryer
- air
- duct
- neck
- heating element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000000694 effects Effects 0.000 title description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 21
- 238000001035 drying Methods 0.000 abstract description 3
- 239000003570 air Substances 0.000 description 44
- 230000001133 acceleration Effects 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 1
- 210000003679 cervix uteri Anatomy 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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 performance and feel, while reducing the noise of the apparatus.
- 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 draws air from outside through the inlet zone and then conveys this air into the circulation chamber, from upstream to downstream, through the heating element, the more or less heated air is then blown outside through the exit zone, so as to dry the hair.
- the invention overcomes these disadvantages 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 hairdryer also includes an air circulation system and a heating element that are arranged in the circulation chamber.
- the circulation system is configured to suck the air from outside, through the inlet zone, and then to convey this air into the circulation chamber, from upstream to downstream, through the heating element, and finally to blow the air more or less heated outside, through the exit zone.
- the hair dryer comprises, as is known, means for adjusting the temperature of the heating element to change the temperature of the air blown out and means for adjusting the speed of air circulation in the circulation chamber, in particular by acting on the speed of rotation of an engine driving a propeller.
- the hair dryer comprises a conduit arranged in the extension of the circulation chamber at the exit zone.
- the circulation chamber and the conduit are arranged along the same longitudinal axis.
- the conduit has an upstream end, a downstream end and a neck arranged between said upstream and downstream ends. More specifically, the neck corresponds to the interior 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 relative to the longitudinal axis of the circulation chamber, between 40 ° and 88 °. The first portion thus has a continuous narrowing of the cross section of the conduit from the upstream end to the neck.
- the angle of descent 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 has a continuous widening of the cross section of the conduit from the neck to the downstream end.
- the passage from a narrowing to an enlargement of the duct cross-section produces a Coanda effect at the cervix.
- the neck, connecting said first and second portions of the conduit 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 at the outlet of the duct.
- the reopening angle allows an increase in the duct section in the second portion between the downstream end and the neck, which causes an increase in the air flow at the outlet of the duct.
- the angle of descent is 82 °.
- the reopening angle is preferably 2.5 °.
- the conduit has a cross section of circular shape.
- the neck has a diameter reduction with respect to the downstream end which is between 2 mm and 4 mm.
- this reduction in diameter is 2 mm.
- the heating element is spaced apart from the neck of the conduit by a distance of between 0 mm and 5 mm.
- the heating element enters the convergence zone of the neck of the duct, corresponding to a zero distance, the Coanda effect is greatly reduced.
- said distance is 4 mm, which allows an optimization of the Coanda effect.
- a gate is arranged between the heating element and the conduit.
- the presence of such a grid is intended to prevent any direct contact of the heating element with the fingers, introducing them through the conduit.
- removable connection means are arranged between the circulation chamber and the duct so as to allow the withdrawal of said duct, for example to replace the circular cross-section duct with a similar one. of different dimensions or by another of rectangular or triangular cross-section.
- FIG. 1 illustrates a sectional view of a hair dryer according to
- FIG. 2 illustrates an enlarged sectional view of the downstream portion of the hair dryer illustrated in Figure 1;
- FIG. 3 illustrates a sectional view of the conduit alone.
- 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 a zone 4 and an exit zone 5.
- a circulation system 6 is arranged in this circulation chamber 3, which allows the ambient air to be drawn through the inlet zone, and then to convey this air over any the length of the circulation chamber 3 so as to then blow the air outside the hair dryer 1, through the exit zone 5.
- This circulation system 6 comprises a propeller 7 arranged near the zone input 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 the propeller 7.
- the hair dryer 1 also comprises a heating element 10 arranged downstream of the rectifier 9, which makes it possible to heat the air in the downstream part of the circulation chamber 3, before its expulsion through the outlet 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 particular to a duct 1 1, illustrated in Figures 1 to 3.
- the duct 1 1 is arranged in the extension of the outlet zone 5 of the circulation chamber 3, along the longitudinal axis X, as illustrated in FIGS. 1 and 2.
- the duct 1 1 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 1 1 corresponds to the section of the exit zone 5 of the circulation chamber 3.
- the duct 1 1 has a shape of revolution with a neck 14 which defines on said duct 1 1 an upstream portion 15 and a downstream portion 16, illustrated in Figure 3.
- the configuration of the duct 1 1, as shown in Figures 1 to 3, makes it possible to subject the air leaving the circulation chamber 3 to a Coanda effect, phenomenon of fluid mechanics known per se.
- the air leaving the circulation chamber 3, at the exit zone 5, is subjected to a reduction of passage section due to the presence of the neck 14, which forces the air to flow at an angle corresponding to an angle of descent a of the upstream portion 15, illustrated in FIG.
- the outgoing air is compressed to the passage section of the neck 14. Once the neck has passed, this outgoing air relaxes following the increase in cross section to the downstream end 13 of the conduit 1 January.
- the outgoing air expands and then flows at an angle corresponding to a reopening angle ⁇ of the downstream portion 16, illustrated in FIG. 3.
- the angle of descent a and the reopening angle ⁇ are defined with respect to the longitudinal axis X in FIG. 3.
- This geometry of the duct 1 1 makes it possible to generate a suction of the outgoing air towards the downstream end 13, which increases the speed of the outlet air.
- this geometry of the duct 1 1 makes it possible to jointly increase the air flow rate at the outlet.
- a descent angle has comprised between 40 ° and 88 °, preferably equal to 82 °, and that a reopening angle ⁇ of between 1.5 ° and 3.5 °, preferably equal to 2.5 °, make it possible to optimize this increase in speed and air flow at the outlet of the duct 1 1.
- the dimensions of the duct 1 1 are variable and adapted in part to those of the circulation chamber 3, the passage section of the upstream end 12 of said duct 1 1 corresponding to the passage section of the outlet zone 5 of said chamber circulation 3, and the angles of descent a and reopening ⁇ of the conduit 1 1 being selected in the aforementioned ranges of value.
- the Applicant has found that it is possible to further improve the speed of the air leaving the duct while maintaining an excellent flow, by reducing the diameter D1 at the neck 14 with respect to the diameter D2 at the level of the duct.
- downstream end 13 a value between 2 mm and 4 mm, preferably 2 mm.
- the diameter D2 at the downstream end 13 of the duct is chosen between 30 mm and 40 mm, and is preferably equal to 32 mm, which It also helps blow out the air at an optimized speed, while maintaining excellent flow.
- the downstream end 17 of the heating element 10 is spaced from the neck 14 of the duct 1 1 by a distance d which is between 0 mm and 5 mm, which influences the Coanda effect sought.
- this distance d is 4 mm to optimize this Coanda effect.
- the hair dryer 1 comprises a gate 18 which is arranged downstream of the heating element 10 in the circulation chamber 3. This gate 18 prevents contact with the heating element 10 .
- the conduit 1 1 is circular in shape. However, it is possible to envisage a section of square, rectangular or triangular shape for the duct 1 1, even other, while maintaining a descent angle a and a reopening angle ⁇ as provided for the embodiment of Figures 1 to 3.
- the duct 1 1 remains fixed permanently to the circulation chamber 3.
- removable connection means between the downstream end 19 of the circulation chamber 3 and the upstream end 12 of the 1 1 conduit, for example a socket or a latching system between said downstream ends 19 and upstream 12, so as to allow the disassembly of the conduit 1 1 for its replacement by another of different configuration remaining under the guise of the invention .
Landscapes
- Cleaning And Drying Hair (AREA)
Abstract
Description
Claims
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 true EP3328237A1 (fr) | 2018-06-06 |
EP3328237B1 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 (fr) |
KR (1) | KR102585672B1 (fr) |
CN (1) | CN107847031B (fr) |
BR (1) | BR112018001555B1 (fr) |
ES (1) | ES2837131T3 (fr) |
FR (1) | FR3039377B1 (fr) |
RU (1) | RU2712366C1 (fr) |
WO (1) | WO2017017330A1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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. |
FR3111676B1 (fr) | 2020-06-19 | 2022-12-16 | Seb Sa | Hélice pour appareil soufflant comprenant des canaux radiaux de passage d’air |
FR3111527B1 (fr) | 2020-06-19 | 2022-07-29 | Seb Sa | Sèche-cheveux comportant un support amortisseur |
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 |
Family Cites Families (9)
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 |
EP1707070A3 (fr) * | 2002-12-27 | 2006-10-18 | Matsushita Electric Works, Ltd. | Sèche-cheveux pourvu d'un générateur d'ions négatifs |
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 |
-
2015
- 2015-07-28 FR FR1557226A patent/FR3039377B1/fr active Active
-
2016
- 2016-07-08 WO PCT/FR2016/051761 patent/WO2017017330A1/fr active Application Filing
- 2016-07-08 KR KR1020187005251A patent/KR102585672B1/ko active IP Right Grant
- 2016-07-08 ES ES16744816T patent/ES2837131T3/es active Active
- 2016-07-08 CN CN201680043901.6A patent/CN107847031B/zh active Active
- 2016-07-08 RU RU2018105699A patent/RU2712366C1/ru active
- 2016-07-08 BR BR112018001555-5A patent/BR112018001555B1/pt active IP Right Grant
- 2016-07-08 EP EP16744816.6A patent/EP3328237B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
BR112018001555B1 (pt) | 2022-07-05 |
BR112018001555A2 (pt) | 2018-09-18 |
ES2837131T3 (es) | 2021-06-29 |
CN107847031A (zh) | 2018-03-27 |
KR102585672B1 (ko) | 2023-10-06 |
KR20180034531A (ko) | 2018-04-04 |
FR3039377B1 (fr) | 2017-09-01 |
EP3328237B1 (fr) | 2020-11-18 |
FR3039377A1 (fr) | 2017-02-03 |
CN107847031B (zh) | 2020-11-20 |
WO2017017330A1 (fr) | 2017-02-02 |
RU2712366C1 (ru) | 2020-01-28 |
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