EP1704792A1 - Haartrockner - Google Patents

Haartrockner Download PDF

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Publication number
EP1704792A1
EP1704792A1 EP06006042A EP06006042A EP1704792A1 EP 1704792 A1 EP1704792 A1 EP 1704792A1 EP 06006042 A EP06006042 A EP 06006042A EP 06006042 A EP06006042 A EP 06006042A EP 1704792 A1 EP1704792 A1 EP 1704792A1
Authority
EP
European Patent Office
Prior art keywords
fan
air tunnel
hair dryer
airflow
value
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
Application number
EP06006042A
Other languages
English (en)
French (fr)
Other versions
EP1704792B1 (de
Inventor
Kenji c/oMatsushita Electric Works Ltd. Kamada
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Publication of EP1704792A1 publication Critical patent/EP1704792A1/de
Application granted granted Critical
Publication of EP1704792B1 publication Critical patent/EP1704792B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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 configurations of a fan and an air tunnel of a hair dryer.
  • a purpose of the present invention is to provide a hair dryer which can generate a constant volume of strong airflow without neither increasing revolution number of a motor nor enlarging an outer diameter of a fan by decreasing pressure loss in an air tunnel.
  • a hair dryer in accordance with an aspect of the present invention comprises a housing having a substantially cylindrical air tunnel, a fan provided in the air tunnel, a motor for revolving the fan and a heater.
  • the fan is a centrifugal fan having a revolution shaft, a circular disc provided substantially perpendicular to a center axis of the revolution shaft, and a plurality of impeller blades each provided substantially perpendicular to the circular disc but curved with respect to a radial line passing the center axis of the revolution shaft.
  • a value of D1/D2 is in a region equal to or larger than 1.0 and equal to or smaller than 1.45 (1.0_D1/D2_1.45).
  • a value of D1/D3 is in a range equal to or larger than 0.1 and equal to or smaller than 0.75 (0.6_D1/D3_0.75).
  • the value D1/D2 is equal to or larger than 1.0.
  • the outer diameter D1 of the fan and the inner diameter D2 of the outlet of the airflow of the air tunnel of the housing so that the value D1/D2 in the region equal to or larger than 1.0 and equal to or smaller than 1.45, even when the same fan and motor as those of the conventional hair dryer are used, the volume of airflow of the hair dryer can be increased by reducing the pressure loss in the air tunnel.
  • the efficiency of the fan (output of the fan/ output of the motor) can be maximized.
  • FIG. 1 shows a configuration of a hair dryer 1 in accordance with this embodiment.
  • a housing 2 of the hair dryer 1 has an air tunnel 3 having substantially cylindrical shape and a grip 4 which is formed substantially perpendicular to the sir tunnel 3.
  • the hair dryer 1 further comprises a heater 5, a fan 6 and a motor 7 for driving revolution of the fan 6 which are provided in an inside of the air tunnel 3, grids 10 and 11 which are attached to an inlet 8 and an outlet 9 of airflow of the air tunnel 3 for preventing foreign matter from getting into the air tunnel 3, an operation switch 12 provided on the grip 4, and a nozzle 13 detachably attached to the outlet 9 of airflow.
  • the fan 6 is provided at a portion in the vicinity of the inlet 8 of airflow.
  • FIG. 2 shows a shape of the fan 6 observed from front.
  • the fan 6 is a centrifugal fan which is generally used in a case that pressure loss is larger.
  • the fan 6 has a revolution shaft 61, a circular disc 62 provided substantially perpendicular to a center axis of the revolution shaft 61 and a plurality of impeller blades 63 each of which is substantially perpendicular to the circular disc 62 and curved in a predetermined direction against a radial line passing the center axis of the revolution shaft 61.
  • the circular disc 62 may be gently slanted toward a downstream side in an airflow path from the revolution axis 61 to outer periphery thereof, as shown in FIG. 1. When it is attended to neighboring two impeller blades 63, these two impeller blades 63 are formed so that a distance between them becomes gradually wider from inner portion near to the revolution axis 61 to outer periphery of the circular disc 62.
  • FIG. 3 shows a relationship between a ratio D1/D2 of an outer diameter of the fan 6 against an inner diameter D2 of the outlet 9 of airflow of the air tunnel 3 of the housing 2 and pressure loss of the hair dryer.
  • abscissa shows value of the ratio D1/D2 of the outer diameter of the fan 6 against the inner diameter D2 of the outlet 9 of airflow
  • ordinate shows value of the pressure loss of the hair dryer.
  • the inner diameter D2 of the outlet 9 of airflow denotes not an inner diameter of a thing such as heater 5 contained in the housing 2 but an inner diameter of the housing 2 serving as the outlet 9 of airflow in a state that the nozzle 13 is not attached thereto.
  • the outer diameter D1 of the fan denotes not the diameter of the circular disc 61 but a diameter at the most outside portion of the impeller blades 63.
  • the volume of airflow of the hair dryer 1 can be increased by reducing the pressure loss in the air tunnel 3.
  • FIG. 4 shows definition of the pressure loss of the hair dryer.
  • abscissa shows value of a volume of airflow generated by one revolution of the fan
  • ordinate shows value of pressure of the airflow.
  • a characteristic curve designated by a symbol PQ shows a PQ-characteristic of the fan which shows a performance of the fan. As can be seen from PQ-characteristic curve, the larger the volume of airflow becomes, the lower the pressure decreases.
  • a characteristic curve designated by a symbol PL shows a pressure loss characteristic curve showing a relation between the volume of airflow and the pressure loss due to the air tunnel and the built-in objects contained therein. Generally, the larger the volume of airflow becomes, the larger the pressure loss increases.
  • a cross point P of the PQ-characteristic curve and the pressure loss characteristic curve corresponds to the pressure loss of the hair dryer mentioned here. If the pressure loss due to the air tunnel and the built-in objects is decreased, the inclination of the pressure loss characteristic curve becomes gentle, so that the cross point P of the PQ-characteristic curve and the pressure loss characteristic curve shifts rightward in the figure, and thereby, the value of the pressure at the cross point P falls and the volume of airflow increases.
  • FIG. 5 shows a relation between the ratio D1/D3 of the outer diameter D1 of the fan 6 against the inner diameter D3 of the air tunnel 3 surrounding the fan 6 and the maximum efficiency of the fan.
  • the value of the ratio D1/D3 has a maximum value in the vicinity of the value 0.6, and the value of the maximum efficiency of the fan suddenly falls when the value of the ratio D1/D3 becomes smaller than 0.6 or larger than 0.75.
  • the cause of this phenomenon is considered as follows.
  • the outer diameter D1 of the fan 6 and the inner diameter D2 of the outlet 9 of airflow of the air tunnel 3 of the housing 2 are selected so that the value D1/D2 in the region equal to or larger than 1.0 and equal to or smaller than 1.45, it is possible to increase the volume of airflow generated by the hair dryer 1 due to reduction of the pressure loss in the air tunnel 3 although the same performance of the fan using the same fan 6 and motor 7 as those of the conventional hair dryer.
  • the outer diameter D1 of the fan 6 and the inner diameter D3 of the air tunnel 3 of the housing 2 surrounding the fan 6 are selected so that the value D1/D3 in the region equal to or larger than 0.6 and equal to or smaller than 0.75, it is possible to maximize the efficiency of the fan (output of the fan/ output of the motor) although the same performance of the fan using the same fan 6 and motor 7 as those of the conventional hair dryer.
  • the hair dryer which generates strong airflow with a constant volume can be provided without increasing the rotation number of the motor and without enlarging the outer diameter of the fan by reducing the pressure loss due to the air tunnel.

Landscapes

  • Cleaning And Drying Hair (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cosmetics (AREA)
EP06006042A 2005-03-25 2006-03-23 Haartrockner Not-in-force EP1704792B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005087419A JP2006263249A (ja) 2005-03-25 2005-03-25 ヘアドライヤー

Publications (2)

Publication Number Publication Date
EP1704792A1 true EP1704792A1 (de) 2006-09-27
EP1704792B1 EP1704792B1 (de) 2008-08-27

Family

ID=36339864

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06006042A Not-in-force EP1704792B1 (de) 2005-03-25 2006-03-23 Haartrockner

Country Status (8)

Country Link
US (1) US20060213074A1 (de)
EP (1) EP1704792B1 (de)
JP (1) JP2006263249A (de)
KR (1) KR100693085B1 (de)
CN (1) CN100438799C (de)
AT (1) ATE406124T1 (de)
DE (1) DE602006002411D1 (de)
RU (1) RU2320248C2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160206073A1 (en) * 2015-01-16 2016-07-21 Elchim S.P.A. Electric hairdryer with a motor protecting device

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD544998S1 (en) * 2006-02-21 2007-06-19 P.S. Pibbs, Inc. Dual handle electric hair dryer
US7926198B2 (en) * 2008-05-29 2011-04-19 Pet Projects Thermoelectric handheld dryer
KR101468674B1 (ko) * 2008-07-18 2014-12-04 탁승호 저소음 송풍 모듈을 갖는 열풍장치
US20100263223A1 (en) * 2009-03-06 2010-10-21 Charlotte Wynne Compact hair dryer with replaceable styling attachments
KR200461234Y1 (ko) * 2010-10-15 2012-06-29 오태준 헤어드라이어의 압축송풍장치
CN202341168U (zh) * 2011-06-13 2012-07-25 尤汉贤 一种供电吹风使用的集风嘴
GB201205679D0 (en) * 2012-03-30 2012-05-16 Dyson Technology Ltd A hand held appliance
GB2515813B (en) * 2013-07-05 2017-07-05 Dyson Technology Ltd A handheld appliance
WO2015001307A1 (en) * 2013-07-05 2015-01-08 Dyson Technology Limited A handheld appliance
GB2515809B (en) * 2013-07-05 2015-08-19 Dyson Technology Ltd A handheld appliance
GB2516249B (en) * 2013-07-16 2017-03-01 Dyson Technology Ltd Heater for a hand held appliance
CN106897524B (zh) * 2017-02-28 2020-06-12 苏州浪潮智能科技有限公司 一种优化风扇外框出风口结构的设计方法
CN110520009B (zh) * 2017-04-27 2022-07-29 芭比丽丝法科私人有限公司 带有速度控制的干发器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19500994A1 (de) * 1995-01-14 1996-07-18 Braun Ag Laufrad für ein Radialgebläse
JP2001204537A (ja) 2000-01-27 2001-07-31 Matsushita Electric Works Ltd ヘアードライヤー
US20020174559A1 (en) * 1999-11-25 2002-11-28 Matsushita Electric Works, Ltd. Hair dryer

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
US1341653A (en) * 1916-08-16 1920-06-01 Charles M Lee Fan, propeller, &c.
US1981991A (en) * 1933-11-07 1934-11-27 Thaddeus E Cline Pump
US2484554A (en) * 1945-12-20 1949-10-11 Gen Electric Centrifugal impeller
US3102679A (en) * 1962-01-15 1963-09-03 Loren Cook Company Centrifugal impeller units
DE3428650C2 (de) * 1984-08-03 1986-08-14 Braun Ag, 6000 Frankfurt Haartrockner mit Axialgebläse
DE3661035D1 (en) * 1985-06-29 1988-12-01 Klifa Gmbh & Co Water pump impeller
US4794225A (en) * 1987-10-09 1988-12-27 Maese Hector L Tube axial handheld blow dryer for hair
RU2065713C1 (ru) * 1992-06-16 1996-08-27 Краснодарский политехнический институт Электрофен
CN2211193Y (zh) * 1993-06-18 1995-11-01 杨琼香 带半导体加热装置的导流式吹风机
CN2252549Y (zh) * 1996-03-20 1997-04-23 李宗胜 一种改良构造的吹发机
US6393208B1 (en) * 2000-08-14 2002-05-21 Daniel M. Nosenchuck Compressor with integrated impeller and motor
US6885810B2 (en) * 2001-02-10 2005-04-26 Wella Aktiengesellschaft Electrically heated hair dryer with catalytic odor filter
KR100483248B1 (ko) * 2002-06-29 2005-04-18 유닉스전자주식회사 헤어드라이어의 원적외선 및 음이온 발생용 패드구조 및그 제조방법

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19500994A1 (de) * 1995-01-14 1996-07-18 Braun Ag Laufrad für ein Radialgebläse
US20020174559A1 (en) * 1999-11-25 2002-11-28 Matsushita Electric Works, Ltd. Hair dryer
JP2001204537A (ja) 2000-01-27 2001-07-31 Matsushita Electric Works Ltd ヘアードライヤー

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 24 11 May 2001 (2001-05-11) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160206073A1 (en) * 2015-01-16 2016-07-21 Elchim S.P.A. Electric hairdryer with a motor protecting device
US9737125B2 (en) * 2015-01-16 2017-08-22 Elchim S.P.A. Electric hairdryer with a motor protecting device

Also Published As

Publication number Publication date
EP1704792B1 (de) 2008-08-27
KR100693085B1 (ko) 2007-03-12
CN100438799C (zh) 2008-12-03
JP2006263249A (ja) 2006-10-05
KR20060103175A (ko) 2006-09-28
US20060213074A1 (en) 2006-09-28
ATE406124T1 (de) 2008-09-15
HK1093141A1 (zh) 2007-02-23
CN1846560A (zh) 2006-10-18
RU2320248C2 (ru) 2008-03-27
DE602006002411D1 (de) 2008-10-09
RU2006108170A (ru) 2007-10-20

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