• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a hair dryer (1) which aims to provide significant drying performance and feel, while reducing noise. The hairdryer comprises an air circulation chamber (3) provided with an inlet zone (4) and an outlet zone (5), an air circulation system (6) and an element heating (10). The hair dryer also comprises a conduit (11) arranged in the extension of the circulation chamber. The duct has an upstream end (12), a downstream end (13) and a neck (14) arranged between said ends, the first portion of the duct arranged between the upstream end and the neck having a descent angle (α) by with respect to a longitudinal axis (X), between 40 ° and 88 °, and the second portion of the duct arranged between the neck and the downstream end having a reopening angle (β) with respect to said longitudinal axis, between 1, 5 ° and 3.5 °.
    公开号:FR3039377A1
    申请号:FR1557226
    申请日:2015-07-28
    公开日:2017-02-03
    发明作者:Valentin Javelle；Nicolas Lauchet
    申请人:SEB SA；
    IPC主号:
    专利说明:

    HAIR DRYER WITH COANDA EFFECT AIR OUTPUT DUCT
    Technical area
    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.
    State of the art
    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 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.
    It is known the patent application US 2013/0111777 A1 which describes a hairdryer configured to amplify the flow of air output. For this, the hair dryer includes an output head configured to create a Coanda effect producing an acceleration of the airflow and to increase this flow of air. According to this design, the flow of the outlet air is perpendicular to the flow of air in the circulation chamber, which imposes a significant power of the circulation system and a high speed operation of the engine equipping said circulation system, so that the Coanda effect can be effective. This design therefore generates a significant consumption of energy and noise, problems frequently encountered with previous hair dryers, whatever their designs. Summary of the invention
    The present 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. To this end, 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 hairdryer 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.
    Remarkably, the hair dryer comprises a conduit arranged in the extension of the circulation chamber at the exit zone. Thus, the circulation chamber and the conduit are arranged along the same longitudinal axis. In addition, the conduit has an upstream end, a downstream end and a neck arranged between said upstream and downstream ends. 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 second portion of the duct, arranged between the neck and the downstream end, has an angle of reopening with respect to said longitudinal axis, between 1.5 ° and 3.5 °. The neck, connecting said first and second portion of the conduit, is curved in 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. In addition, 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 Applicant has found that by implementing the aforementioned geometric parameters of the duct, that is to say by choosing a descent angle and a reopening angle in the aforementioned ranges of values, the duct makes it possible to produce an acceleration of air and an increase in the output air flow optimally. It is therefore possible to reduce the power and dimensioning of the air circulation system whose motorization can operate at a lower speed than those of previous hair dryers, while achieving drying performance and felt on the hair, equivalent or even improved. This advantageously makes it possible to improve the acoustic performance of the hair dryer.
    In a preferred embodiment of the hair dryer according to the invention, the angle of descent is 82 °. Likewise, the reopening angle is preferably 2.5 °. The choice of one and / or the other of the aforementioned parameters makes it possible to optimize the result.
    In a preferred embodiment of the hair dryer according to the invention, the conduit has a cross section of circular shape. However, it is possible to envisage a duct having a cross section of rectangular or triangular shape, or even others, without departing from the scope of the invention.
    According to this preferred embodiment of the hair dryer where 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. Preferably, this reduction in diameter is 2 mm.
    In one embodiment of the hair dryer according to the invention, the heating element is spaced apart from the neck of the conduit by a distance of between 0 mm and 5 mm. When the heating element enters the convergence zone of the neck of the duct, corresponding to a zero distance, the Coanda effect is greatly reduced. On the contrary, when the distance is beyond 5 mm, no more difference on the Coanda effect is noticed. In a preferred embodiment, said distance is 4 mm, which allows an optimization of the Coanda effect.
    In one embodiment of the hair dryer according to the invention, 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.
    In one embodiment of the hair dryer according to the invention, 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.
    Brief description of the figures
    The following description of a preferred embodiment makes it possible to highlight the object of the invention, in support of figures, among which: FIG. 1 illustrates a sectional view of a hair dryer according to FIG. invention; - Figure 2 illustrates an enlarged sectional view of the downstream portion of the hair dryer illustrated in Figure 1; - Figure 3 illustrates a sectional view of the conduit alone.
    detailed description
    As illustrated in 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 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 includes a heating element 10 is 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 exit zone 5. The hairdryer 1 also comprises control means and adjusting the motor 8 and the heating element 10 (not shown) which make it possible to modify, individually, the rotational speed of the motor 8 and the heating temperature of the heating element 10, from an off position to a full position power. 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 11, illustrated in FIGS. 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 FIG. 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 chamber In addition, 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 illustrated in FIGS. 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 exit zone 5, is subjected to a reduction of passage section because of the presence of the neck 14, which forces the air to flow in a angle corresponding to an angle of descent a of the upstream portion 15, illustrated in Figure 3. The outgoing air is compressed to the passage section of the neck 14. Once the pass passed, this outgoing air relaxes following increasing the passage section to the downstream end 13 of the duct 11. The outgoing air expands and then flows at an angle corresponding to a reopening angle β of the downstream portion 16, illustrated in FIG. The angle of descent a and the reopening angle β are defined with respect to the longitudinal axis X in FIG. 3. This geometry of the duct 11 makes it possible to generate a suction of the outgoing air towards the downstream end 13. , which increases the speed of the air output. In addition, this geometry of the duct 11 makes it possible to jointly increase the air flow at the outlet.
    The research carried out by the applicant has made it possible to show the importance of choosing an angle of descent a of the upstream portion 15 and a reopening angle β of the downstream portion 16, adapted so as to increase the speed and the flow rate of the air at the outlet of the duct 11. The Applicant has found that a descent angle has comprised between 40 ° and 88 °, preferably equal to 82 °, and that a reopening angle β 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 11.
    The dimensions of the duct 11 are variable and adapted in part 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 a and reopening β of the duct 11 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. Preferably, 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 also contributes to blowing the outlet air with an optimized speed, while maintaining excellent speed.
    As shown in particular in Figure 2, the downstream end 17 of the heating element 10 is spaced from the neck 14 of the conduit 11 by a distance d which is between 0 mm and 5 mm, which influences the Coanda effect wanted. Preferably, this distance d is 4 mm to optimize this Coanda effect.
    As illustrated in Figures 1 and 2, 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 Other characteristics or variants are conceivable without departing from the scope of the invention.
    In Figures 1 to 3, the conduit 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 other, while maintaining a descent angle α and a reopening angle β as provided for the embodiment of FIGS. 1 to 3.
    In these FIGS. 1 to 3, the duct 11 remains fixed permanently to the circulation chamber 3. However, it is possible to provide removable connection means between the downstream end 19 of the circulation chamber 3 and the upstream end 12 of the duct. 11, for example a socket or a locking system between said downstream ends 19 and upstream 12, so as to allow the disassembly of the conduit 11 for its replacement by another of different configuration remaining under the guise of the invention.
    权利要求:
    Claims (12)
    [1" id="c-fr-0001]
    Hair dryer (1) comprising an air circulation chamber (3) provided with an inlet zone (4) and an outlet zone (5), an air circulation system (6). ) and a heating element (10), the air circulation system and the heating element being configured in the circulation chamber to draw air from outside through the inlet zone, to convey this air in the flow chamber, from upstream to downstream, through the heating element, and blow the air more or less heated outside through the exit zone, characterized in that the dryer hair comprises a duct (11) arranged in the extension of the circulation chamber at the outlet zone, said duct having an upstream end (12), a downstream end (13) and a neck (14) arranged between said ends upstream and downstream, the first portion (15) of the duct arranged between the upstream end and the neck near the at an angle of descent (a) with respect to a longitudinal axis (X) of the flow chamber, between 40 ° and 88 °, and the second portion (16) of the duct arranged between the neck and the downstream end having a reopening angle (β) with respect to said longitudinal axis, between 1.5 ° and 3.5 °.
    [2" id="c-fr-0002]
    2. Hair dryer (1) according to claim 1, wherein the angle of descent (a) is 82 °.
    [3" id="c-fr-0003]
    3. Hair dryer (1) according to one of claims 1 or 2, wherein the reopening angle (β) is 2.5 °
    [4" id="c-fr-0004]
    4. Hair dryer (1) according to one of claims 1 to 3, wherein the conduit (11) has a circular cross section.
    [5" id="c-fr-0005]
    5. Hair dryer (1) according to claim 4, wherein the neck (14) has a reduction in diameter relative to the downstream end of between 2 mm and 4 mm.
    [6" id="c-fr-0006]
    The hair dryer (1) according to claim 5, wherein said diameter reduction is 2 mm.
    [7" id="c-fr-0007]
    7. Hair dryer (1) according to one of claims 1 to 3, wherein the conduit (11) has a cross section of rectangular shape.
    [8" id="c-fr-0008]
    8. Hair dryer (1) according to one of claims 1 to 3, wherein the conduit (11) has a cross section of triangular shape.
    [9" id="c-fr-0009]
    9. Hair dryer (1) according to one of claims 1 to 8, wherein the heating element (10) is spaced from the neck (14) of the conduit (11) a distance (d) between 0 mm and 5 mm.
    [10" id="c-fr-0010]
    The hair dryer (1) of claim 9, wherein said distance (d) is 4 mm.
    [11" id="c-fr-0011]
    11. Hair dryer (1) according to one of claims 1 to 10, wherein a grid (18) is arranged between the heating element (10) and the conduit (11).
    [12" id="c-fr-0012]
    12. Hair dryer (1) according to one of claims 1 to 11, wherein removable connection means are arranged between the circulation chamber (3) and the conduit (11) so as to allow removal of said conduit.
    类似技术:
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    同族专利:
    公开号 | 公开日
    BR112018001555A2|2018-09-18|
    WO2017017330A1|2017-02-02|
    ES2837131T3|2021-06-29|
    EP3328237B1|2020-11-18|
    RU2712366C1|2020-01-28|
    FR3039377B1|2017-09-01|
    EP3328237A1|2018-06-06|
    CN107847031A|2018-03-27|
    CN107847031B|2020-11-20|
    KR20180034531A|2018-04-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20010051042A1|2000-01-27|2001-12-13|Shingo Ohmura|Hairdryer|
    JP4671302B2|2007-09-13|2011-04-13|九州日立マクセル株式会社|Hair dryer with converging nozzle|
    US20130111777A1|2011-01-21|2013-05-09|Ba Solutions Co., Ltd.|Hair dryer|
    FR2817450B1|2000-12-06|2003-02-14|Seb Sa|HAIR DRYER WITH DEVICE FOR VARIATION OF THE AIR FLOW OUTLET SECTION|
    US6957500B2|2002-11-01|2005-10-25|Wahl Clipper Corporation|Attachment for handheld dryer|
    US6986212B2|2002-12-27|2006-01-17|Matsushita Electric Works, Ltd.|Hair dryer with minus ion generator|
    GB201020847D0|2010-12-08|2011-01-19|Jemella Ltd|A hair dryer|
    FR2982747B1|2011-11-18|2014-01-10|Seb Sa|HAIRDRYER WITH CONCENTRIC FINES|
    CN202874233U|2012-10-29|2013-04-17|蒋道法|Hair protecting dryer|FR3111527A1|2020-06-19|2021-12-24|Seb S.A.|Hair dryer with shock-absorbing support|
    FR3111676A1|2020-06-19|2021-12-24|Seb S.A.|Propeller for blowing apparatus comprising radial air passage channels|
    FR3111526A1|2020-06-19|2021-12-24|Seb S.A.|Hairdryer comprising external and internal housings separated by annular isolation devices.|
    法律状态:
    2016-07-29| PLFP| Fee payment|Year of fee payment: 2 |
    2017-02-03| PLSC| Search report ready|Effective date: 20170203 |
    2017-07-31| PLFP| Fee payment|Year of fee payment: 3 |
    2018-07-27| PLFP| Fee payment|Year of fee payment: 4 |
    2019-07-31| PLFP| Fee payment|Year of fee payment: 5 |
    2020-07-31| PLFP| Fee payment|Year of fee payment: 6 |
    2021-07-29| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1557226A|FR3039377B1|2015-07-28|2015-07-28|HAIR DRYER WITH COANDA EFFECT AIR OUTPUT DUCT|FR1557226A| FR3039377B1|2015-07-28|2015-07-28|HAIR DRYER WITH COANDA EFFECT AIR OUTPUT DUCT|
    PCT/FR2016/051761| WO2017017330A1|2015-07-28|2016-07-08|Hair dryer having coanda effect air outlet|
    KR1020187005251A| KR20180034531A|2015-07-28|2016-07-08|A hair dryer comprising an exhaust pipe having a Coanda effect|
    EP16744816.6A| EP3328237B1|2015-07-28|2016-07-08|Hair dryer having coanda effect air outlet|
    ES16744816T| ES2837131T3|2015-07-28|2016-07-08|Hair dryer with an air outlet duct with coanda effect|
    BR112018001555-5A| BR112018001555A2|2015-07-28|2016-07-08|hair dryer with a coanda air outlet conduit|
    RU2018105699A| RU2712366C1|2015-07-28|2016-07-08|Hair dryer with air outlet duct with coanda effect|
    CN201680043901.6A| CN107847031B|2015-07-28|2016-07-08|Hair dryer comprising an air outlet duct with coanda effect|
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