EP1950337B1 - Elektrisches Haushaltsgerät - Google Patents

Elektrisches Haushaltsgerät Download PDF

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Publication number
EP1950337B1
EP1950337B1 EP07101137A EP07101137A EP1950337B1 EP 1950337 B1 EP1950337 B1 EP 1950337B1 EP 07101137 A EP07101137 A EP 07101137A EP 07101137 A EP07101137 A EP 07101137A EP 1950337 B1 EP1950337 B1 EP 1950337B1
Authority
EP
European Patent Office
Prior art keywords
electric
household appliance
electric household
outer casing
drum
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.)
Active
Application number
EP07101137A
Other languages
English (en)
French (fr)
Other versions
EP1950337A1 (de
Inventor
Stefano Casagrande
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.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
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 Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to AT07101137T priority Critical patent/ATE530696T1/de
Priority to PL07101137T priority patent/PL1950337T3/pl
Priority to ES07101137T priority patent/ES2376483T3/es
Priority to EP07101137A priority patent/EP1950337B1/de
Priority to RU2008102832/12A priority patent/RU2451119C2/ru
Publication of EP1950337A1 publication Critical patent/EP1950337A1/de
Application granted granted Critical
Publication of EP1950337B1 publication Critical patent/EP1950337B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • D06F37/304—Arrangements or adaptations of electric motors
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 

Definitions

  • the present invention relates to an electric household appliance.
  • the present invention relates to an electric household appliance preferably corresponding to a washing machine comprising an electric protection circuit connecting parts of the appliance to a substantially zero reference potential; to which the following description refers purely by way of example.
  • washing machines have an outer casing in which is fitted a laundry wash assembly normally comprising a wash tub; a wash drum mounted inside the wash tub to rotate freely about a predetermined axis of rotation; a pulley fitted to the shaft rotating the wash drum; and an electric motor driven by an electric board and connected by a drive belt to the pulley to rotate the wash drum about the axis of rotation.
  • the above washing machines are also known to comprise an electric protection circuit connecting the outer casing of the washing machine and the outer frame of the electric motor electrically to an electric ground system, which, as is known, has a conveniently zero reference potential.
  • JP 09 131494 discloses a motor covered with a mold resin that is installed on the outer bottom of an outer drum via a motor mount.
  • An anchor bolt is inserted and fixed through a location hole of a stator core of the motor, and an earth connecting plate is fixed by the bolt as well.
  • An earthing line is connected to the plate. The line is earthed via the mount.
  • the electric protection circuit performs at least two functions: firstly, it provides for discharging to the ground system the electrostatic charges accumulating on the electric motor frame as a result of the drive belt rubbing on the motor shaft as the shaft rotates, thus preventing electrostatic discharges on the sensitive circuit parts of the electric motor and/or on the electric control board; and, secondly, it provides for discharging to the ground system any electric noise produced by switching of the brushes on the commutator of the electric motor.
  • the above electric protection circuit is also known to normally comprise a low-pass filter connected between the outer casing of the washing machine and the ground system to filter the high-frequency components from the electric signals circulating in the protection circuit before they reach the ground system.
  • an electric household appliance as claimed in Claim 1 and, preferably, in any one of the following Claims depending directly or indirectly on Claim 1.
  • Number 1 in the attached drawing indicates as a whole an electric household appliance preferably corresponding to a washing machine comprising an outer casing 2 made of metal and in which is fitted a laundry wash assembly 3, which comprises a wash tub 4 connected appropriately to outer casing 2, and a wash drum 5 mounted inside wash tub 4 to rotate freely about an axis of rotation A.
  • Washing machine 1 also comprises a pulley 6 fitted to the shaft 7 rotating wash drum 5; and an electric motor 8 driven by an electric board (not shown) and connected by a drive belt 9 to pulley 6 to rotate wash drum 5.
  • Washing machine 1 also comprises an electric protection circuit 10 electrically connecting outer casing 2 of the washing machine and the outer frame 11 of electric motor 8 to an electric ground system 12 at zero reference potential.
  • Electric protection circuit 10 substantially comprises a passive electrical device 13 having a first terminal 14 connected to outer frame 11 of electric motor 8, and a second terminal 15 connected to outer casing 2 of the washing machine. Electric protection circuit 10 also comprises an electric conductor connecting second terminal 15 of the passive electrical device 13 to electric ground system 12.
  • the passive electrical device 13 comprises a resistor or an inductor having an impedance which ranges between 470*10 3 and 10 7 ohms. Tests show that a resistor or an inductor having an impedance approximately 10 6 ohms provides for effectively grounding the electrostatic charges accumulated by electric motor 8, while at the same time providing electric protection circuit 10 with sufficient impedance to reduce the high-frequency noise generated by electric motor 8.
  • the electric household appliance described above is extremely advantageous, in that the resistor or the inductor is an electric component extremely cheap, ensures electrostatic charge flow to the ground system, and at the same time has an extremely high electric circuit impedance at high frequencies, capable of suppressing the high-frequency noise generated by the electric motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Food-Manufacturing Devices (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Elimination Of Static Electricity (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Claims (5)

  1. Elektrisches Haushaltsgerät (1), das ein Außengehäuse (2); eine Wäschetrommel (5), die innerhalb des Außengehäuses (2) untergebracht ist und sich um eine festgelegte Drehachse (A) dreht; einen Elektromotor (8) mit einem Außenrahmen (11) zum Drehen der Trommel (5) um die Drehachse (A); und einen elektrischen Schutzschaltkreis (10) aufweist, der seinerseits mindestens einen Widerstand oder mindestens eine Drossel (13) mit einem ersten Anschluss (14), der mit dem Außenrahmen (11) des Elektromotors (8) verbunden ist, und mit einem zweiten Anschluss (15), der mit dem Außengehäuse (2) des elektrischen Haushaltsgeräts (1) verbunden ist, aufweist, dadurch gekennzeichnet, dass der Widerstand oder die Drossel (13) eine Impedanz im Bereich von annähernd 470*103 und 107 Ohm aufweisen.
  2. Elektrisches Haushaltsgerät gemäß Anspruch 1, wobei der Widerstand oder die Drossel (13) eine Impedanz von annähernd 106 Ohm aufweisen.
  3. Elektrisches Haushaltsgerät gemäß einem der vorangehenden Ansprüche, wobei der zweite Anschluss (15) des Widerstands oder der Drossel (13) mit einem elektrischen Erdungssystem (12) mit elektrischem Nullpotenzial verbunden ist.
  4. Elektrisches Haushaltsgerät gemäß einem der vorangehenden Ansprüche und in Entsprechung zu einer Waschmaschine.
  5. Elektrisches Haushaltsgerät gemäß Anspruch 5, wobei die Trommel (5) einer Waschtrommel entspricht, die mit einer Welle (7) ausgerüstet ist, an der eine Umlenkrolle (6) angebracht ist, die mit dem Elektromotor (8) über einen Antriebsriemen (9) verbunden ist.
EP07101137A 2007-01-25 2007-01-25 Elektrisches Haushaltsgerät Active EP1950337B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT07101137T ATE530696T1 (de) 2007-01-25 2007-01-25 Elektrisches haushaltsgerät
PL07101137T PL1950337T3 (pl) 2007-01-25 2007-01-25 Elektryczne urządzenie gospodarstwa domowego
ES07101137T ES2376483T3 (es) 2007-01-25 2007-01-25 Electrodoméstico.
EP07101137A EP1950337B1 (de) 2007-01-25 2007-01-25 Elektrisches Haushaltsgerät
RU2008102832/12A RU2451119C2 (ru) 2007-01-25 2008-01-24 Бытовой электроприбор

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07101137A EP1950337B1 (de) 2007-01-25 2007-01-25 Elektrisches Haushaltsgerät

Publications (2)

Publication Number Publication Date
EP1950337A1 EP1950337A1 (de) 2008-07-30
EP1950337B1 true EP1950337B1 (de) 2011-10-26

Family

ID=38157945

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07101137A Active EP1950337B1 (de) 2007-01-25 2007-01-25 Elektrisches Haushaltsgerät

Country Status (5)

Country Link
EP (1) EP1950337B1 (de)
AT (1) ATE530696T1 (de)
ES (1) ES2376483T3 (de)
PL (1) PL1950337T3 (de)
RU (1) RU2451119C2 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB650601A (en) * 1948-10-11 1951-02-28 Robertshaw Fulton Controls Co Improvements in or relating to control devices responsive to physical conditions andembodying conjointly operated electric switches
RU2006084C1 (ru) * 1992-04-09 1994-01-15 Центральный научно-исследовательский институт "Дельфин" Катушка индуктивности
JPH09131494A (ja) * 1995-11-09 1997-05-20 Toshiba Corp 洗濯機
DE19809224A1 (de) * 1998-03-04 1999-09-09 Bosch Siemens Hausgeraete Haushaltsgerät

Also Published As

Publication number Publication date
PL1950337T3 (pl) 2012-03-30
ES2376483T3 (es) 2012-03-14
EP1950337A1 (de) 2008-07-30
RU2451119C2 (ru) 2012-05-20
ATE530696T1 (de) 2011-11-15
RU2008102832A (ru) 2009-07-27

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