EP0920266B1 - Elektrische schaltung für die stromversorgung - Google Patents

Elektrische schaltung für die stromversorgung Download PDF

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Publication number
EP0920266B1
EP0920266B1 EP97938886A EP97938886A EP0920266B1 EP 0920266 B1 EP0920266 B1 EP 0920266B1 EP 97938886 A EP97938886 A EP 97938886A EP 97938886 A EP97938886 A EP 97938886A EP 0920266 B1 EP0920266 B1 EP 0920266B1
Authority
EP
European Patent Office
Prior art keywords
heating resistor
fan motor
switch
tap
heating
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.)
Expired - Lifetime
Application number
EP97938886A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0920266A1 (de
Inventor
Boris Wonka
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.)
Braun GmbH
Original Assignee
Braun GmbH
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 Braun GmbH filed Critical Braun GmbH
Publication of EP0920266A1 publication Critical patent/EP0920266A1/de
Application granted granted Critical
Publication of EP0920266B1 publication Critical patent/EP0920266B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A45D20/22—Helmets with hot air supply or ventilating means, e.g. electrically heated air current
    • A45D20/30—Electric circuitry specially adapted for hair drying devices

Definitions

  • the invention relates to an electrical circuit arrangement according to the preamble of Claim 1.
  • Such a circuit arrangement is known from DE-A-3 133 325.
  • Blower motor connected in the middle branch of a diode bridge, the one hand on taps of the two heating resistors and on the other hand to a pole of the supply AC voltage source is connected.
  • the two heating resistors are over Switch contacts connected to the other pole of the AC voltage source. At only a closed switch contact becomes one of the two heating resistors of both Half waves of the alternating current flow through, while the blower motor only by one Half wave is applied. If, on the other hand, both switch contacts are closed, then both heating resistors flow through each of two half-waves of the alternating current and the blower motor is also acted on by both half-waves. With only one A closed switch contact is therefore only part of the heating and blower output available, while with both closed switch contacts the entire Performance is achieved.
  • the task of the invention is the electrical circuit arrangement of the aforementioned Art while maintaining the advantageous function in such a way that the structure of the Circuit arrangement is designed to be simpler and less expensive, in particular less has electrical components.
  • the rectifier circuit according to the invention has only two rectifiers. This represents a reduction in the number of electrical components required, what especially with a mass product such as a hair dryer or one Fan heater leads to significant cost savings.
  • the function of the Circuitry has not changed, however. Furthermore, by closing of the switch mentioned the total heating power and the total blower power reached. This is a special simple and convenient circuit arrangement created.
  • the two rectifiers are with two Tapping points of the first heating resistor connected.
  • the two tapping points on the first heating resistor can be chosen freely. This can be done by a corresponding Selection of the tapping points the voltage present at the DC fan motor to be influenced.
  • the two rectifiers are included a tap point and a base point of the first heating resistor.
  • the a tap point on the first heating resistor can be chosen freely. So that can voltage applied to the DC fan motor can be influenced.
  • the two tapping points or the one Tapping point arranged symmetrically with respect to the base points of the first heating resistor are. In this way it is achieved that the first heating resistor in both Half waves of the alternating current is loaded equally.
  • the two rectifiers with the connected to two opposite base points of the heating resistor. In this way it is achieved that the maximum available voltage on the DC fan motor pending.
  • connection point connected to the heating resistor of the DC fan motor at one tap point in the middle of the second Heating resistor is connected. In this way it is achieved that the second Heating resistor is loaded equally in both half-waves of the alternating current.
  • FIG. 1 shows an electrical circuit arrangement 1 in which a first Heating resistor 2 arranged between the poles 3, 4 of an AC voltage source is.
  • a series circuit consisting of a switch 5 and a second heating resistor 6 between the poles 3, 4 of the AC voltage source switched.
  • the two heating resistors 2, 6 are of approximately the same design and generate approximately the same heating power in each case.
  • a rectifier circuit 7 has two rectifiers 8, 9, in particular two diodes which are connected to each other antiparallel. At the connection point 10 of the two rectifiers 8, 9 is one of the connection points of a DC fan motor 11 connected.
  • the still free connection points of the two rectifiers 8, 9 are at two tapping points 12, 13 of the first heating resistor 2 connected, each approximately the same distance from the associated base 14, 15 of the first heating resistor 2. This The distance is, for example, about 10 percent of the total length of the first heating resistor 2.
  • the still free connection point of the DC fan motor 11 is on a tap 16 of the second heating resistor 6 connected, which is approximately in the middle of the second heating resistor 6.
  • switch 5 When switch 5 is open, the alternating current flows between the poles 3, 4 of the alternating voltage source in both directions over the first heating resistor 2.
  • the alternating current the first half wave also flows from pole 3 over part of the first Heating resistor 2, the tap 14, the rectifier 8, the connection point 10, the DC fan motor 11, the tap 16 and half of the second Heating resistor 6 to pole 4 of the AC voltage source. Because of the open Switch 5, however, no alternating current flows during the opposite second Half wave from pole 4 via the DC fan motor 11 to pole 3 of the AC voltage source.
  • the alternating current flows between the poles 3, 4 AC voltage source in both directions via the first heating resistor 2 and via the second heating resistor 6.
  • the alternating current of the first half wave flows from Pole 3 over part of the first heating resistor 2, the tap 14, the rectifier 8, the connection point 10, the DC fan motor 11, the tap point 16 and half of the second heating resistor 6 to the pole 4 of the AC voltage source.
  • the alternating current flows further during the opposite second half-wave from pole 4 over part of the first Heating resistor 2, the tap 15, the rectifier 9, the connection point 10, the DC fan motor 11, the tap 16 and half of the second Heating resistor 6 to pole 3 of the AC voltage source.
  • switch 5 When switch 5 is open, the alternating current only flows through the first heating resistor 2, while with switch 5 closed, the alternating current through the first Heating resistor 2 and the second heating resistor 6 flows. The heating power is thereby when switch 5 is closed is larger than when switch 5 is open.
  • an electrical circuit arrangement 17 is shown, which is essentially corresponds to the circuit arrangement 1 of FIG. 1. Because of this, they are matched electrical components marked with the same reference numerals.
  • the circuit arrangement 17 of FIG. 2 differs from the circuit arrangement 1 of Figure 1 by another embodiment of the rectifier circuit 7.
  • the rectifier circuit 18 of the circuit arrangement 17 of FIG. 2 is the free one Connection point of the rectifier 8 with a tap 19 of the first heating resistor 2 connected, which is arranged approximately in the middle of the heating resistor 2.
  • the free connection point of the rectifier 9 is at the base 15 of the first heating resistor 2 connected.
  • the free connection point of the DC fan motor 11 is with a tapping point 20 of the second heating resistor 6, which is approximately at 25 Percent of the total length of the second heating resistor 6 is arranged.
  • switch 5 When switch 5 is open, the alternating current flows between the poles 3, 4 of the alternating voltage source in both directions over the first heating resistor 2.
  • the alternating current of the first half-wave also flows from pole 3 over half of the first Heating resistor 2, the tap 19, the rectifier 8, the connection point 10, the DC fan motor 11, the tap 20 and part of the second Heating resistor 6 to pole 4 of the AC voltage source. Because of the open Switch 5, however, no alternating current flows during the opposite second Half wave from pole 4 via the DC fan motor 11 to pole 3 of the AC voltage source.
  • the alternating current flows between the poles 3, 4 AC voltage source in both directions via the first heating resistor 2 and via the second heating resistor 6.
  • the alternating current of the first half wave flows from Pole 3 over half of the first heating resistor 2, the tap 19, the rectifier 8, the connection point 10, the DC fan motor 11, the tap point 20 and part of the second heating resistor 6 to the pole 4 of the AC voltage source.
  • the alternating current flows further during the opposite second half-wave from pole 4 via base point 15, the rectifier 9, the connection point 10, the DC fan motor 11, the Tapping point 20 and part of the second heating resistor 6 to pole 3 of the AC voltage source.
  • switch 5 When switch 5 is open, the alternating current only flows through the first heating resistor 2, while with switch 5 closed, the alternating current through the first Heating resistor 2 and the second heating resistor 6 flows. The heating power is thereby when switch 5 is closed is larger than when switch 5 is open.
  • the tapping point 19, 20 can drop off at the DC fan motor 11 Voltage can be set. Due to the symmetrical arrangement of the tap 20 with regard to the tap point 19 and the base point 15, the voltage drop is on the DC fan motor 11 the same for both half-waves. Due to the symmetrical The arrangement of the interrogation point 19 with respect to the heating resistor 2 becomes this heating resistor 2 loaded equally on both half-waves. Due to the asymmetrical arrangement of the Tapping point 20 with respect to the heating resistor 6 becomes this heating resistor 6 two half-waves loaded unequally.
  • An electrical circuit arrangement 21 is shown in FIG corresponds to the circuit arrangement 1 of FIG. 1. Because of this, they are matched electrical components marked with the same reference numerals.
  • the circuit arrangement 21 in FIG. 2 differs from the circuit arrangement 1 of Figure 1 by another embodiment of the rectifier circuit 7.
  • the rectifier circuit 22 of the circuit arrangement 21 of FIG. 3 is the free one Connection point of the rectifier 8 with the base 14 of the first heating resistor 2 connected.
  • the free connection point of the rectifier 9 is at the base 15 of the first heating resistor 2 connected.
  • the free connection point of the DC fan motor 11 is connected to the tap point 16 of the second heating resistor 6, the is arranged at about half of the second heating resistor 6.
  • switch 5 When switch 5 is open, the alternating current flows between the poles 3, 4 of the alternating voltage source in both directions over the first heating resistor 2.
  • the alternating current the first half wave also flows from the pole 3 via the base point 14 Rectifier 8, the connection point 10, the DC fan motor 11, the Tapping point 16 and half of the second heating resistor 6 to the pole 4 of the AC voltage source. Due to the open switch 5, however, no alternating current flows during the opposite second half-wave from pole 4 via the DC fan motor 11 to pole 3 of the AC voltage source.
  • the alternating current flows between the poles 3, 4 AC voltage source in both directions via the first heating resistor 2 and via the second heating resistor 6.
  • the alternating current of the first half wave flows from Pole 3 over the base point 14, the rectifier 8, the connection point 10, the DC fan motor 11, the tap 16 and half of the second heating resistor 6 to pole 4 of the AC voltage source. Due to the closed switch 5 the alternating current continues to flow during the opposite second half-wave from the pole 4 via the base point 15, the rectifier 9, the connection point 10, the DC fan motor 11, the tap 16 and half of the second heating resistor 6 to pole 3 of the AC voltage source.
  • switch 5 When switch 5 is open, the alternating current only flows through the first heating resistor 2, while with switch 5 closed, the alternating current through the first Heating resistor 2 and the second heating resistor 6 flows. The heating power is thereby when switch 5 is closed is larger than when switch 5 is open.
  • the circuit arrangements 1, 17, 21 of Figures 1 to 3 can be particularly advantageous used with an electric hair dryer or with an electric fan heater become.
  • the DC fan motor 11 is used in this case to generate a Air flow and the two heating resistors 2, 6 serve to heat this air flow.
  • the switch 5 can then between a lower fan level with a lower heat generation and a higher fan level with a higher one Heat generation can be switched.
  • a second, not shown Switch in series for parallel connection of the two heating resistors 2, 6 is arranged, the circuit arrangements 1, 17, 21 of Figures 1 to 3 can be switched on and off.
  • first and second heating resistors (2,6) intended.
  • these are interchangeable with resistors, that a total of at least one heating resistor in the circuit arrangement remains.
  • the respective heating resistor in Figs. 1-3 in total or partially replaced by a corresponding resistance component.
  • the resistance component is in a further variant as a single resistor or through several resistors connected in series are formed.
  • Resistors instead of a heating resistor are the electrical connection points to the DC fan motor (11) or to the rectifier diodes (8,9) in each case if necessary, between the resistors connected in series, that for all Operating modes there is no excessive power on the electrical components. This will i.a. in that the resistance values correspond to the positions of the electrical connection points (12, 13, 16, 19, 20) can be selected in Figs. 1-3.
  • the second heating resistor (6) is preferably connected in series by two of the same size switched resistors in Fig. 1 or 3 or by two series-connected resistors in Fig. 2 in the resistance ratio to each other from 1/3 to 2/3 of the original Heating resistor (6) replaced.

Landscapes

  • Cleaning And Drying Hair (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Relay Circuits (AREA)
  • Details Of Television Scanning (AREA)
  • Control Of Direct Current Motors (AREA)
  • Control Of Resistance Heating (AREA)
  • Rectifiers (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
EP97938886A 1996-08-08 1997-08-08 Elektrische schaltung für die stromversorgung Expired - Lifetime EP0920266B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19632029 1996-08-08
DE19632029A DE19632029A1 (de) 1996-08-08 1996-08-08 Elektrische Schaltung für die Stromversorgung
PCT/EP1997/004313 WO1998006296A1 (de) 1996-08-08 1997-08-08 Elektrische schaltung für die stromversorgung

Publications (2)

Publication Number Publication Date
EP0920266A1 EP0920266A1 (de) 1999-06-09
EP0920266B1 true EP0920266B1 (de) 2001-01-24

Family

ID=7802136

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97938886A Expired - Lifetime EP0920266B1 (de) 1996-08-08 1997-08-08 Elektrische schaltung für die stromversorgung

Country Status (11)

Country Link
US (1) US6031210A (ru)
EP (1) EP0920266B1 (ru)
JP (1) JP2000516494A (ru)
CN (1) CN1117537C (ru)
AT (1) ATE198819T1 (ru)
AU (1) AU720786B2 (ru)
DE (2) DE19632029A1 (ru)
DK (1) DK0920266T3 (ru)
ES (1) ES2155697T3 (ru)
RU (1) RU2198483C2 (ru)
WO (1) WO1998006296A1 (ru)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7153286B2 (en) 2002-05-24 2006-12-26 Baxter International Inc. Automated dialysis system
HK1048722A2 (en) * 2002-08-28 2003-03-28 Wing Kin Chan Hair dryer with improved heating power control and circuits therefor
US8027572B2 (en) 2008-02-22 2011-09-27 Baxter International Inc. Dialysis machine having multiple line voltage heater
US9435459B2 (en) * 2009-06-05 2016-09-06 Baxter International Inc. Solenoid pinch valve apparatus and method for medical fluid applications having reduced noise production
EP2371236A1 (en) * 2010-03-31 2011-10-05 Tek Maker Corporation Multi-setting circuits for the portable dryer
CN113035032B (zh) * 2021-03-09 2022-09-30 山东电力高等专科学校 一种串半波整流型窃电模拟装置及模拟仿真方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3133325A1 (de) * 1981-02-05 1982-09-02 Braun Ag, 6000 Frankfurt Stromversorgungsschaltung fuer einen elektrischen verbraucher mit zwei parallelen heizwiderstaenden und einem geblaesemotor
DE3302609A1 (de) * 1983-01-27 1984-08-02 Braun Ag, 6000 Frankfurt Schaltunganordnung zur stromversorgung
GB2293098B (en) * 1994-09-15 1998-10-07 Kenford Ind Co Ltd Hair treatment device

Also Published As

Publication number Publication date
AU720786B2 (en) 2000-06-15
ATE198819T1 (de) 2001-02-15
US6031210A (en) 2000-02-29
DE19632029A1 (de) 1998-02-12
EP0920266A1 (de) 1999-06-09
JP2000516494A (ja) 2000-12-12
ES2155697T3 (es) 2001-05-16
DK0920266T3 (da) 2001-06-05
RU2198483C2 (ru) 2003-02-10
AU4117897A (en) 1998-03-06
WO1998006296A1 (de) 1998-02-19
CN1227475A (zh) 1999-09-01
CN1117537C (zh) 2003-08-13
DE59702955D1 (de) 2001-03-01

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