WO2000021404A1 - Appareil seche-cheveux - Google Patents
Appareil seche-cheveux Download PDFInfo
- Publication number
- WO2000021404A1 WO2000021404A1 PCT/FR1999/002424 FR9902424W WO0021404A1 WO 2000021404 A1 WO2000021404 A1 WO 2000021404A1 FR 9902424 W FR9902424 W FR 9902424W WO 0021404 A1 WO0021404 A1 WO 0021404A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shell
- turbine
- housing
- heating element
- faired
- Prior art date
Links
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 a hair dryer apparatus comprising a housing formed by a suction casing containing a centrifugal fan comprising a turbine associated with an electric motor, said casing being connected to a blowing nozzle containing a heating element.
- the element is made of resistant metal wire wound on a support of insulating material in the form of a cross.
- the surface of exchange of the resistant wire with the air current generated by the fan is increased by folding the wire in accordion on itself before its winding on the support.
- the turns thus formed are then part of a volume delimited on the one hand by a surface of revolution tangent to the outside of the turns, and on the other hand by a surface of revolution tangent to the inside of the turns.
- the inside and outside diameters of these surfaces of revolution are also dimensioned. so that the heating element is located in the zone of highest flow of the air flow channel.
- This has a first annular cross-section, reduced, delimited by the internal wall of the device and the external ends of the blades of the turbine, a second section, annular, suddenly increased, delimited by the internal wall of the device. and the external surface of the engine and, at the interface between the engine and the heating element, a third section, circular, still suddenly increased, corresponding overall to the internal section of the apparatus at this location.
- the evacuation of the calories dissipated by the heating element in an air stream of narrow annular section results in “hot spots” at the outlet orifice of the blow nozzle of the hair dryer.
- the present invention aims to provide a hair dryer device which meets the requirements of practice better than those previously known, in particular in that it allows the improvement of the air flow inside the device, in particular by reducing the pressure drops, in that it reduces the noise generated and improves the heat exchanges between the heating element and the drying air, which increases the comfort of use of the device, at a cost. lower and a lower requirement on the temperature resistance of the constituent materials of the device.
- the invention notably proposes a hair dryer device comprising a housing formed by a suction casing, containing a centrifugal fan comprising a turbine associated with an electric motor, said casing being connected to a blowing nozzle containing an element.
- the electric motor is at least partly included in a streamlined shell delimiting with the internal face of the housing an air flow channel of annular transverse section increasing continuously and gradually from the turbine or from a determined distance from the turbine, in the direction of the heating element.
- the shell is formed by a cylindrical shell extended by a conical or substantially conical end portion, faired in the direction of the heating element; - The conical or substantially conical end portion is truncated;
- the external diameter of the ferrule is equal to or substantially equal to the external diameter of the turbine directly located near the ferrule;
- the shell is pierced with at least one communication orifice between the space surrounding the engine and the air flow channel;
- the cylindrical shell of the faired shell has on its external face, regularly arranged, blades for rectifying the flow of air, advantageously of length substantially equal to the width of the shell; - the equivalent radius RA (defined below) of the annular section SA located between the cylindrical shell of the shell and the internal wall of the housing, and the equivalent radius RX of the annular section SX, located between the conical end portion , faired, and the internal wall of the housing, at a distance X from the junction between the cylindrical shell and said conical portion, are linked by the following formula:
- RX 2 RI 2 - (RA + kX) 2 with
- FIG. 1 is a schematic sectional view of a first embodiment of an apparatus according to
- FIG. 1 is a cutaway perspective view of the apparatus of Figure 1.
- FIG. 3 is an exploded perspective view of a second embodiment of an apparatus according to
- Figures 1 and 2 show a hair dryer 1 comprising a housing 2, of plastic material of the type known for hair dryers, formed of a suction housing 3 cylindrical or slightly conical towards the rear end of the apparatus.
- the casing is open at this end where it has a cylindrical orifice 4 for suction, by example provided with a guide collar 5 of low conicity, formed in one piece with the casing.
- the casing also contains a centrifugal fan 6 of known type, comprising a thin cylindrical turbine 7 (for example 15 mm), associated with an electric motor 8.
- the motor is a rotary electric motor, for example with a useful power of 30 Watts, advantageously with a power of between around 15 Watts and around 45 Watts, supplied with alternating current from the mains.
- the casing 3 is connected to a blowing nozzle 9 for example formed by a cone with walls flared inwards.
- the spout 9 contains a heating element 10 constituted by a resistant metal wire, wound in an accordion on a support 11 made of insulating material and in the form of a cross with four radial branches, arranged between them at right angles.
- the heating element 10 also fits between an external, truncated cone, with an apex angle of between 10 and 80 °, for example 30 ° and an internal cone of similar conicity.
- the heating element is hollow on at least one part 13 located on the side of the engine.
- the housing of the device contains a faired shell 14 in the shape of an Obus, in material plastic, which contains the entire electric motor 8.
- the plastic material used is flexible, for example made of elastomer, for example of SHORE A hardness from 60 to 70.
- the elastic fairing shell By being integral with the engine mounting lugs, the elastic fairing shell also acts as a shock absorber.
- the shell 14 is formed of a cylindrical shell 15 in the end of an adjoining side, that is to say is substantially near or directly near the upper edge of the turbine 7, and which is extended on the other side by a substantially conical end portion 16, the walls of which are slightly convex, that is to say with a large radius of curvature.
- the conical portion 16 is directed towards the heating element 10 inside which it penetrates, in the hollowed-out part 13.
- the cylindrical shell 15 comprises blades 17 regularly disposed around the periphery of the shell, for example twelve or fourteen blades in the form of curved pallets arranged to convert the kinetic energy, corresponding to the tangential component of the air flow turbine in turbine outlet, potential energy of static pressure, usable to overcome the pressure losses of the circuit and by consequently improve the aeraulic efficiency in terms of air flow.
- the blades also serve as blocking and fixing shims of the ferrule, that is to say of the faired shell in the housing.
- the outside diameter of the shell 15 is equal to or • substantially equal to the outside diameter of the turbine 7.
- the cylindrical shell 15 also comprises two perforated parts 18, for example rectangular, located on either side of the axis 19 of the device 1, between two blades, and allowing communication between the space 20 located in the immediate vicinity of the electric motor 8 and / or of its fixing part (not shown) which holds it in place, and the air flow channel defined by the faired shell 14 and the internal face 21 of the opposite housing.
- the faired shell has a profile determined as a function of the profile of the internal wall of the device.
- FIG. 2 shows the annular section SA between the turbine 7 and the internal wall 22 of the casing 3 of the apparatus, and the annular section SX located at a distance X from the junction line 23 between the ferrule 15 and the conical portion 16, said annular section being delimited by the wall outer 24 of said portion and the inner wall 21 of the spout.
- this section SX is limited by the circle of radius RX, formed by the external surface of the conical end portion 16 and the radius RI formed by the surface of the internal wall 21 of the nozzle of the apparatus. to the right of this section.
- RV the external radius of the cylindrical shell
- a radius RA of a circular section equivalent to the annular section SA is defined such that:
- RX 7 RI 2 - (RA + kX) 2
- the values of k are less than or equal to 0.13, and for example between
- FIG. 3 shows a hair dryer apparatus 30 according to another embodiment of the invention.
- a housing 31 formed by a two-piece suction casing 32 and 33, namely a cylindrical hollow part 32, open on either side, provided with an end orifice 34 and a bell-shaped shell 33, perforated by grids 35 regularly distributed and snap-fitted detachably to said cylindrical part 32 in screws opposite opening 34.
- the casing comprises a half-handle 36 'of preemption arranged to cooperate with another half-handle 36' 'as will be described below.
- the device comprises a centrifugal fan composed of a turbine 37 known in itself, adjoining a small substantially cylindrical part 38 for supporting the electric motor 39 provided with a central shaft for actuating said turbine. More specifically, the support comprises two lateral tabs 38 'which are inserted into two recesses of complementary shapes themselves formed in two lateral wings integral with the faired shell, extending radially outward from said shell and themselves attached to the body of the hair dryer housing.
- the supports are also extended by profiled ribs in the blade (not shown) to improve the flows.
- Various elements 40 are associated with the turbine, which will allow its connection to a cable 41 for electrical supply via the handle formed after assembly by the two half-handles 36 ', 36''.
- the electric motor 39 is entirely included in a streamlined shell 42 formed - of a cylindrical shell 43, comprising blades 44 for straightening the air flow and fixing of the shell in the apparatus, and an end portion 45 in substantially conical shape, with a slightly convex wall, as described above.
- the cylindrical shell extends for example over a distance of between a quarter and a half of the length of the shell, for example a third.
- the substantially conical shape comprises, for example, a perforated part 46 putting the space located near the motor 39 in communication with the air flow channel formed between the faired shell and the internal face of the device, which improves the cooling of the motor 39, without significantly disturbing the air flows and allowing the passage of the electric supply to the motor.
- the end of the faired hull which can for example always surround the entire engine, is open, for example truncated, and puts in communication the space around the engine with the area external to said hull.
- the apparatus 30 further comprises a blowing nozzle 47 provided with a first cylindrical or substantially cylindrical part 48 arranged to be fixed on the cylindrical part 32 of the casing, the turbine, motor and cylindrical shell assembly of the faired shell being included in the part of the device formed by the parts or part of part 32 and 48, and a part 49 of frustoconical shape with slightly concave wall.
- This part 49 advantageously comprises a removable accessory 50 at its end allowing the air jet coming from the drying apparatus to be directed substantially parallel to a plane.
- the other half-handle 36 '' arranged to cooperate with the half-handle 36 'of the part 32 is also provided to form an entire handle by interlocking and screwing during assembly.
- the spout 47 internally comprises a heating element 51 comprising a support 52 for example formed by four star branches, on which is wound a heating resistor (not shown), of the type described with reference to FIGS. 1 and 2.
- a part 53 for thermal protection and preventing access to the active parts by a user is also provided in a manner known per se.
- the turbine 7 actuated in rotation by the electric motor 8 sucks in the air coming from the suction opening 4 and rejects it at its periphery 54.
- the air (arrow 55) is then directed and refocused by the blades 17 in a laminar manner in the flow channel delimited by the internal wall of the housing of the device and the faired shell according to the invention.
- the annular section SA at the level of the cylindrical shell and of the turbine increases for example at first, due to the diverging cone-shaped inclination of the housing above the shell, and then, in the spout of blowing, due to the steeper slope of the faired shell than that of the wall of the blowing nozzle.
- the laminar nets 56 then lick the heating resistance and make it possible to obtain at the outlet 57 of the spout a laminar air flow substantially without hot spots.
- the present invention is not limited to the embodiments more particularly described. She embraces on the contrary, all the variants and in particular those where the heating element is constituted by a resistance of shape different from that more particularly described, that where the blowing nozzle is not in frustoconical shape but is of cylindrical shape, that where the ferrule of the shell is not cylindrical but slightly conical, for example with an angle of less than 5 °, for example 3 °.
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
- Cleaning And Drying Hair (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002312031A CA2312031A1 (fr) | 1998-10-09 | 1999-10-08 | Appareil seche-cheveux |
EP99970303A EP1119270A1 (fr) | 1998-10-09 | 1999-10-08 | Appareil seche-cheveux |
JP2000575393A JP2002527128A (ja) | 1998-10-09 | 1999-10-08 | ヘアドライヤ装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR98/12657 | 1998-10-09 | ||
FR9812657A FR2784274B1 (fr) | 1998-10-09 | 1998-10-09 | Appareil seche-cheveux |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000021404A1 true WO2000021404A1 (fr) | 2000-04-20 |
Family
ID=9531365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1999/002424 WO2000021404A1 (fr) | 1998-10-09 | 1999-10-08 | Appareil seche-cheveux |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1119270A1 (fr) |
JP (1) | JP2002527128A (fr) |
CA (1) | CA2312031A1 (fr) |
FR (1) | FR2784274B1 (fr) |
WO (1) | WO2000021404A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7971369B2 (en) * | 2004-09-27 | 2011-07-05 | Roy Studebaker | Shrouded floor drying fan |
WO2017163006A1 (fr) * | 2016-03-24 | 2017-09-28 | Dyson Technology Limited | Accessoire d'un appareil portatif |
CN110150827A (zh) * | 2019-06-17 | 2019-08-23 | 嘉兴嘉飞贸易有限公司 | 新型电吹风 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3568038B1 (fr) * | 2017-01-12 | 2023-09-06 | Dyson Technology Limited | Appareil portable |
GB2562276B (en) | 2017-05-10 | 2021-04-28 | Dyson Technology Ltd | A heater |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1493762A (fr) * | 1966-07-23 | 1967-09-01 | Peigne ou brosse pour séchage électrique et soins des cheveux | |
DE2529816A1 (de) * | 1975-07-04 | 1977-01-27 | Krups Fa Robert | Heissluft-haarbehandlungsgeraet |
DE3141245A1 (de) | 1981-10-16 | 1983-04-28 | Richard 8000 München Enhuber | Geblaese, insbesondere fuer kleindimensionierte, elektrisch betriebene handhaartrockner |
-
1998
- 1998-10-09 FR FR9812657A patent/FR2784274B1/fr not_active Expired - Fee Related
-
1999
- 1999-10-08 WO PCT/FR1999/002424 patent/WO2000021404A1/fr not_active Application Discontinuation
- 1999-10-08 JP JP2000575393A patent/JP2002527128A/ja active Pending
- 1999-10-08 EP EP99970303A patent/EP1119270A1/fr not_active Withdrawn
- 1999-10-08 CA CA002312031A patent/CA2312031A1/fr not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1493762A (fr) * | 1966-07-23 | 1967-09-01 | Peigne ou brosse pour séchage électrique et soins des cheveux | |
DE2529816A1 (de) * | 1975-07-04 | 1977-01-27 | Krups Fa Robert | Heissluft-haarbehandlungsgeraet |
DE3141245A1 (de) | 1981-10-16 | 1983-04-28 | Richard 8000 München Enhuber | Geblaese, insbesondere fuer kleindimensionierte, elektrisch betriebene handhaartrockner |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7971369B2 (en) * | 2004-09-27 | 2011-07-05 | Roy Studebaker | Shrouded floor drying fan |
WO2017163006A1 (fr) * | 2016-03-24 | 2017-09-28 | Dyson Technology Limited | Accessoire d'un appareil portatif |
CN110150827A (zh) * | 2019-06-17 | 2019-08-23 | 嘉兴嘉飞贸易有限公司 | 新型电吹风 |
CN110150827B (zh) * | 2019-06-17 | 2024-05-10 | 嘉兴市资格电气科技股份有限公司 | 电吹风 |
Also Published As
Publication number | Publication date |
---|---|
JP2002527128A (ja) | 2002-08-27 |
FR2784274B1 (fr) | 2000-12-29 |
FR2784274A1 (fr) | 2000-04-14 |
CA2312031A1 (fr) | 2000-04-20 |
EP1119270A1 (fr) | 2001-08-01 |
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