WO1998019387A2 - Low-voltage generation in mains-powered hot-air appliances having a fan motor - Google Patents
Low-voltage generation in mains-powered hot-air appliances having a fan motor Download PDFInfo
- Publication number
- WO1998019387A2 WO1998019387A2 PCT/IB1997/001171 IB9701171W WO9819387A2 WO 1998019387 A2 WO1998019387 A2 WO 1998019387A2 IB 9701171 W IB9701171 W IB 9701171W WO 9819387 A2 WO9819387 A2 WO 9819387A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hot
- motor
- heating element
- air
- mains
- 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
- A45D20/22—Helmets with hot air supply or ventilating means, e.g. electrically heated air current
- A45D20/30—Electric circuitry specially adapted for hair drying devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
Definitions
- the invention relates to a hot-air appliance comprising: a heating element and a motor connected in series to receive a.e. mains voltage.
- Such a hot-air appliance is known, inter alia from United States Patent US 4,323,761.
- Such hot-air appliances are used as hair dryers, hot-air brushes or combs, and hair-drying hoods for personal care and in fan heaters for space heating.
- the motor of the fan producing the stream of hot air is arranged in series with one of the heating elements. Alternatively, the motor can be connected to a tapping of the heating element, as in the case of said United States Patent.
- the motor can be an a.e. motor but frequently a d.c. motor is used. In the last-mentioned case the motor is connected to the heating element via a diode or a rectifier bridge.
- Such hot-air appliances often include electronic circuits for temperature control, for the processing of sensor signals, or for control and signalling purposes. For powering such electronic circuits a direct voltage is required which is comparatively low with respect to the a.e. mains voltage.
- FIG. 2 shows a variant in which an a.e. motor M is connected to the mains voltage terminal L via a first section HIA of the first heating element HI, and to the mains voltage terminal N via a second section HIB of the first heating element HI.
- an a.e. motor it is possible to use a d.c. motor with a rectifier bridge.
- the alternating voltage across the motor M is again rectified with the rectifier diode D5 and the smoothing capacitor C.
- the positive supply terminal VP and the negative supply terminal VN of the electronic circuit E are again connected to the positive and the negative terminal of the smoothing capacitor C.
- the negative supply terminal VN of the electronic circuit E is now floating with respect to the mains voltage terminal N. This need not be a problem if the second heating element H2 is turned on and turned off by means of a relay R which is energized by the electronic circuit E.
Landscapes
- Cleaning And Drying Hair (AREA)
- Direct Air Heating By Heater Or Combustion Gas (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10520223A JP2000504556A (en) | 1996-10-28 | 1997-09-26 | Low Voltage Generation in Commercial Powered Hot Air Appliances with Fan Motor |
EP97940290A EP0878052A2 (en) | 1996-10-28 | 1997-09-26 | Low-voltage generation in mains-powered hot-air appliances having a fan motor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96202993 | 1996-10-28 | ||
EP96202993.0 | 1996-10-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1998019387A2 true WO1998019387A2 (en) | 1998-05-07 |
WO1998019387A3 WO1998019387A3 (en) | 1998-06-18 |
Family
ID=8224524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB1997/001171 WO1998019387A2 (en) | 1996-10-28 | 1997-09-26 | Low-voltage generation in mains-powered hot-air appliances having a fan motor |
Country Status (5)
Country | Link |
---|---|
US (1) | US5943470A (en) |
EP (1) | EP0878052A2 (en) |
JP (1) | JP2000504556A (en) |
CN (1) | CN1076540C (en) |
WO (1) | WO1998019387A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109811279B (en) * | 2019-01-21 | 2021-05-18 | 北京科技大学 | Fiber-reinforced metal-based high-temperature composite material and preparation method thereof |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4003388A (en) * | 1976-04-01 | 1977-01-18 | General Electric Company | Hair dryer variable control |
US4327278A (en) * | 1979-09-10 | 1982-04-27 | Conair Corporation | Simplified multiple speed hair dryer |
DE3139199A1 (en) * | 1981-10-02 | 1983-04-21 | Braun Ag, 6000 Frankfurt | Method and arrangement for controlling and regulating the heating power of an electrical heating and/or drying apparatus |
US5434946A (en) * | 1994-02-03 | 1995-07-18 | Helen Of Troy Corporation | Hair dryer with continuously variable heat intensity and air flow speed |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3497675A (en) * | 1965-04-05 | 1970-02-24 | Chikao Yoshiike | Electric circuit for a hair dryer |
US3867641A (en) * | 1974-02-13 | 1975-02-18 | Minnesota Mining & Mfg | Ac load actuation circuit |
US4085309A (en) * | 1975-06-04 | 1978-04-18 | Sperry Rand Corporation | Control circuit arrangement for a portable electrically heated hair treatment appliance |
US4323761A (en) * | 1979-11-26 | 1982-04-06 | Huebner Otto | Radiant heat hair dryer |
DE3234012A1 (en) * | 1982-09-14 | 1984-03-15 | Braun Ag | Electrical circuit arrangement for hair driers, fan heaters and the like |
DE3302609A1 (en) * | 1983-01-27 | 1984-08-02 | Braun Ag, 6000 Frankfurt | Circuit arrangement for power supply |
DE3617684A1 (en) * | 1986-05-26 | 1987-12-03 | Braun Ag | ELECTRICAL DEVICE FOR PERSONAL NEEDS |
-
1997
- 1997-09-26 JP JP10520223A patent/JP2000504556A/en not_active Abandoned
- 1997-09-26 CN CN97191505A patent/CN1076540C/en not_active Expired - Fee Related
- 1997-09-26 EP EP97940290A patent/EP0878052A2/en not_active Withdrawn
- 1997-09-26 WO PCT/IB1997/001171 patent/WO1998019387A2/en not_active Application Discontinuation
- 1997-10-24 US US08/957,800 patent/US5943470A/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4003388A (en) * | 1976-04-01 | 1977-01-18 | General Electric Company | Hair dryer variable control |
US4327278A (en) * | 1979-09-10 | 1982-04-27 | Conair Corporation | Simplified multiple speed hair dryer |
DE3139199A1 (en) * | 1981-10-02 | 1983-04-21 | Braun Ag, 6000 Frankfurt | Method and arrangement for controlling and regulating the heating power of an electrical heating and/or drying apparatus |
US5434946A (en) * | 1994-02-03 | 1995-07-18 | Helen Of Troy Corporation | Hair dryer with continuously variable heat intensity and air flow speed |
Also Published As
Publication number | Publication date |
---|---|
CN1076540C (en) | 2001-12-19 |
WO1998019387A3 (en) | 1998-06-18 |
EP0878052A2 (en) | 1998-11-18 |
JP2000504556A (en) | 2000-04-11 |
CN1216175A (en) | 1999-05-05 |
US5943470A (en) | 1999-08-24 |
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