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US20190090607A1 - Hairdryer with high electrical safety - Google Patents

Hairdryer with high electrical safety Download PDF

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Publication number
US20190090607A1
US20190090607A1 US15/739,386 US201615739386A US2019090607A1 US 20190090607 A1 US20190090607 A1 US 20190090607A1 US 201615739386 A US201615739386 A US 201615739386A US 2019090607 A1 US2019090607 A1 US 2019090607A1
Authority
US
United States
Prior art keywords
casing
electrical resistance
hairdryer
shell
electric motor
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.)
Abandoned
Application number
US15/739,386
Other languages
English (en)
Inventor
Roberto SASSO
Matteo CIBELLI
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.)
Hospistyle Di Trapani Maria
Original Assignee
Hospistyle Di Trapani Maria
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hospistyle Di Trapani Maria filed Critical Hospistyle Di Trapani Maria
Assigned to HOSPISTYLE di Trapani Maria reassignment HOSPISTYLE di Trapani Maria ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CIBELLI, MATTEO, SASSO, Roberto
Publication of US20190090607A1 publication Critical patent/US20190090607A1/en
Abandoned legal-status Critical Current

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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
    • 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

Definitions

  • a hairdryer including:
  • a flow duct provided in said casing and having an inlet port and an outlet port
  • a motor unit including an electric motor
  • At least one rotor operable in rotation by means of said electric motor and configured for sucking in an air flow through said inlet port and send it into said flow duct towards said outlet port,
  • At least one electrical resistance inserted into said flow duct and configured for heating the air flow taken in by said rotor.
  • the object of the present invention is to solve the technical problems described previously.
  • the object of the present invention is to provide a hairdryer that will be intrinsically safe for the user even following upon conditions that might cause an accident of an electrical nature due to accidental contact with water.
  • the object of the present invention is achieved by a hairdryer having all the features listed at the outset of the present description, and moreover characterized in that:
  • said at least one electrical resistance is coated with electrically insulating material
  • said motor unit includes a watertight casing housing said electric motor.
  • FIG. 1 is a perspective partial see-through view of a hairdryer according to various preferred embodiments of the invention
  • FIG. 2 is a longitudinal cross-sectional view according to the trace II-II of FIG. 1 ;
  • FIG. 3 is a perspective view of internal components of the hairdryer of FIGS. 1 and 2 ;
  • FIG. 4 is a perspective view of a casing of a motor unit of the hairdryer according to the invention.
  • FIGS. 5 and 6 are perspective views according to the arrows V and VI of FIG. 4 , respectively.
  • the reference number 1 in FIG. 1 designates as a whole a hairdryer according to various embodiments of the invention.
  • the hairdryer 1 includes a casing 2 , which develops along a longitudinal axis X 1 and provided within which is a flow duct 4 .
  • the flow duct 4 is in fluid communication with the external environment by means of an intake port 41 N and a delivery port 4 OUT. Within the flow duct 4 there are arranged, all coaxial to the axis X 1 , a rotor 6 and a motor unit 8 including an electric motor M configured for driving the rotor 6 in rotation about the axis X 1 .
  • the rotor 6 can be driven in rotation for sucking in an air flow through the port 41 N and sending it through the flow duct 4 towards the port 4 OUT.
  • the hairdryer 1 includes a first electrical resistance 10 and a second electrical resistance 12 , both obtained by means of a nickel-chromium steel wire wound in a cylindrical and/or conical helical path.
  • Each of the resistances 10 , 12 is coated with an electrically insulating material resistant to high temperatures, for example Teflon.
  • the resistances 10 , 12 are coated throughout their development.
  • Each of the resistances 10 , 12 is supported radially by means of a plurality of ribs 14 of thermoinsulating material, for example mica.
  • Each of the ribs 14 includes a substantially T-shaped coupling profile T 14 .
  • the ribs 14 are fixed to the motor unit 8 by means of the profiles 14 T.
  • the motor unit 8 includes a watertight casing 16 , with the electric motor M enclosed within the watertight casing 16 itself.
  • the casing 16 includes a first shell 18 having a substantially hollow ogival shape, a seal 19 (for example, an annular seal of an O-ring type), and a second shell 20 .
  • the seal 19 is set between the shells 19 and 20 to guarantee water tightness at the interface between them.
  • the motor M is fixed by means of screws to the shell 18 .
  • Each of the shells 18 , 20 is provided with a plurality of radial eyelets spaced at equal angular spaces apart, which are designated, respectively, by the reference numbers 18 A, 20 A.
  • These radial eyelets are used for fixing of the ribs 14 , and in particular for coupling with the profiles T 14 , which are configured for engaging in the eyelets 18 A, 20 A and for being withheld radially by them thanks to the undercut offered by the T-shape.
  • the coupling between the shells 18 , 20 is obtained axially along the axis X 1 with interposition of the seal 19 and with the motor M already inside the casing 16 , then the shells 18 , 20 are fastened together by means of screws S that engage, in corresponding sequences, two axial holes (one smooth and one threaded), one for each of the shells 18 , 20 .
  • the shell 20 is provided with an array of radial vanes 21 , which are configured for co-operating with the rotor 6 for regularizing the air flow within the flow duct 4 .
  • the radial vanes are configured for acting as cooling fins for dissipating the heat generated by the electric motor M.
  • the shell 20 is substantially cup-shaped and includes a first radial extension 22 configured for fixing it to the casing 2 , and a second radial extension 24 having within it a channel 26 configured for routing one or more electrical wiring systems that carry the supply to the motor M.
  • the radial extension 24 moreover passes through the casing 2 and is connected thereto through a seal 28 , which eliminates the possibility of penetration of water into the interface between the casing 2 and the extension 24 .
  • a handle (not visible) by means of which the user can grip the hairdryer during use and inside which the electrical wiring coming out of the channel 26 is routed.
  • a set of pushbuttons may be provided by co-injection of silicone in order to maintain water tightness.
  • the shell 20 moreover includes a through hole coaxial to the axis X 1 , which is traversed by an output shaft 30 of the motor M, fitted on which is the rotor 6 .
  • the shell 20 is closed at the end by a watertight cap 31 that fits on the shaft 30 so as to guarantee water tightness also at the (sliding) interface with the shaft 30 .
  • the cap 31 incorporates a watertight bearing (preferably, a ball bearing) configured for receiving the output shaft 30 and for ensuring water tightness between the latter and the second shell 20 .
  • the shell 16 also includes a through hole coaxial to the axis X 1 fitted in which is a plug-like seal 32 , which couples in a watertight way with the hole in the casing 16 .
  • the plug-like seal 32 includes one or more pairs of through orifices configured for being traversed by the wires that constitute the electrical resistances 10 , 12 in such a way that the latter can penetrate within the casing 16 and be incorporated with the wiring that is routed in the channel 26 without jeopardizing water tightness of the casing 16 itself.
  • the resistances 10 , 12 are obtained by means of a single wire wound twice, a first time to form the resistance 10 and a second time to form the resistance 12 , so that only two portions of wire traverse the seal 32 .
  • the resistances 10 , 12 may be provided by means of separate wires—for example, to envisage a differentiated supply thereof in order to vary the heat power, and consequently the temperature of the air—so that there will be two pairs of portions of wire that traverse the seal 32 .
  • a sleeve 34 having a shape that preferably reproduces, albeit on a smaller scale, the shape of the walls of the casing 2 .
  • the sleeve 34 is located in particular in a position comprised between the electrical resistances 10 , 12 and the wall of the casing 2 , with respect to which it is supported by means of a plurality of radial ribs 36 , preferably obtained in an integral way with the casing 36 .
  • the flow duct 4 is split (albeit not necessarily throughout the length of the casing 2 : this depends upon the axial extension of the sleeve 34 with respect to the casing 2 ) into a main duct defined substantially inside the sleeve 34 , within which find the electrical resistances 10 , 12 and at least part of the watertight casing 16 of the motor unit 8 are located, and a secondary flow duct, which has an annular cross section and is set around the sleeve 34 , in particular between the latter and the casing 2 .
  • a first amount of flow the larger amount—traverses the main duct and impinges upon the electrical resistances 10 , 12 , which are supplied electrically, like the motor M, through the bundle of wiring that traverses the channel 26 , penetrating into the casing 16 , so that the air flow that comes out of the delivery port 4 OUT will have a higher temperature than the air flow drawn in through the port 4 IN.
  • This solution keeps the whole casing 2 cooled and at the same time improves the air flow, in a way at least roughly resembling the effect exerted by the so-called Vortex winglets typical of a wing profile.
  • the set of measures of electrical protection adopted on the hairdryer 1 which render the live parts thereof completely insulated from contact with water, prevents any risk of electric shock for the user also in the case of circumstances that might potentially cause an electric shock, such as in the case where the hairdryer were accidentally to fall into water or if water happens to infiltrate into the hairdryer when it is not being used.

Landscapes

  • Cleaning And Drying Hair (AREA)
US15/739,386 2015-06-26 2016-06-23 Hairdryer with high electrical safety Abandoned US20190090607A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT102015000028294 2015-06-26
ITUB20151695 2015-06-26
PCT/IB2016/053734 WO2016207821A1 (en) 2015-06-26 2016-06-23 Hairdryer with high electrical safety

Publications (1)

Publication Number Publication Date
US20190090607A1 true US20190090607A1 (en) 2019-03-28

Family

ID=54105910

Family Applications (1)

Application Number Title Priority Date Filing Date
US15/739,386 Abandoned US20190090607A1 (en) 2015-06-26 2016-06-23 Hairdryer with high electrical safety

Country Status (5)

Country Link
US (1) US20190090607A1 (ru)
EP (1) EP3313228A1 (ru)
CN (1) CN107920647A (ru)
RU (1) RU2018102353A (ru)
WO (1) WO2016207821A1 (ru)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110150829A (zh) * 2019-06-03 2019-08-23 中山市瑞驰泰克电子有限公司 一种电吹风

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108826671A (zh) * 2018-04-09 2018-11-16 浙江普莱得电器有限公司 一种热风枪用发热芯及热风枪
IT201800007605A1 (it) * 2018-07-30 2020-01-30 Claudio Soresina Asciugacapelli elettrico
FR3091153B1 (fr) * 2018-12-28 2021-10-22 Seb Sa appareil de coiffure avec encapsulage d’un composant électrique ou électronique

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530759A (en) * 1946-12-05 1950-11-21 Laurence H Collins Electric razor
US4879443A (en) * 1987-08-12 1989-11-07 Clairol Incorporated Waterproof switch assembly for electrical appliances
US20070145842A1 (en) * 2005-12-23 2007-06-28 Delta Electronics, Inc. Fan and motor thereof
US7350317B2 (en) * 2004-09-27 2008-04-01 Matsushita Electric Works, Ltd. Electrostatic atomizing hairdryer and electrostatic atomizer
US20140290087A1 (en) * 2010-12-08 2014-10-02 Jemella Limited Hair dryer
US20150037015A1 (en) * 2013-02-04 2015-02-05 Yong Hak LEE Hair dryer
US9707010B2 (en) * 2013-01-15 2017-07-18 W.O.M. World Of Medicine Gmbh Insufflation tube comprising a humidifying material and a heating element, for laparoscopy

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2435925A1 (fr) * 1978-09-14 1980-04-11 Droin Michel Appareil de sechage et de mise en forme de cheveux
CN2172028Y (zh) * 1993-04-19 1994-07-20 王钧剑 护发保健吹风机
CN2267000Y (zh) * 1996-09-24 1997-11-12 戚仁才 牙面吹干机
DE29706658U1 (de) * 1997-04-14 1998-05-14 WIK Elektro-Hausgeräte Vertriebs GmbH & Co. Produktions KG, 45355 Essen Elektrisch beheizter Haartrockner
KR200286480Y1 (ko) * 2002-04-22 2002-08-22 유닉스전자주식회사 헤어드라이어의 전자기파 차폐 구조
CN2569619Y (zh) * 2002-09-18 2003-09-03 郭云华 具有理疗作用的电吹风
GB2446412A (en) * 2007-02-09 2008-08-13 Duna Entpr Sa Heating structure for hair dryers
IT1404304B1 (it) * 2010-11-22 2013-11-22 Pellegrino Dispositivo asciugacapelli perfezionato
KR101285469B1 (ko) * 2013-03-25 2013-07-12 이용학 전자파 제거 헤어드라이어
GB2537511B (en) * 2013-12-10 2017-07-19 Dyson Technology Ltd A hand held appliance

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530759A (en) * 1946-12-05 1950-11-21 Laurence H Collins Electric razor
US4879443A (en) * 1987-08-12 1989-11-07 Clairol Incorporated Waterproof switch assembly for electrical appliances
US7350317B2 (en) * 2004-09-27 2008-04-01 Matsushita Electric Works, Ltd. Electrostatic atomizing hairdryer and electrostatic atomizer
US20070145842A1 (en) * 2005-12-23 2007-06-28 Delta Electronics, Inc. Fan and motor thereof
US20140290087A1 (en) * 2010-12-08 2014-10-02 Jemella Limited Hair dryer
US9707010B2 (en) * 2013-01-15 2017-07-18 W.O.M. World Of Medicine Gmbh Insufflation tube comprising a humidifying material and a heating element, for laparoscopy
US20150037015A1 (en) * 2013-02-04 2015-02-05 Yong Hak LEE Hair dryer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110150829A (zh) * 2019-06-03 2019-08-23 中山市瑞驰泰克电子有限公司 一种电吹风

Also Published As

Publication number Publication date
CN107920647A (zh) 2018-04-17
RU2018102353A3 (ru) 2020-02-25
EP3313228A1 (en) 2018-05-02
WO2016207821A1 (en) 2016-12-29
RU2018102353A (ru) 2019-07-29

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Owner name: HOSPISTYLE DI TRAPANI MARIA, ITALY

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