EP2519673A1 - Washing machine with motor overloading protection - Google Patents
Washing machine with motor overloading protectionInfo
- Publication number
- EP2519673A1 EP2519673A1 EP10792935A EP10792935A EP2519673A1 EP 2519673 A1 EP2519673 A1 EP 2519673A1 EP 10792935 A EP10792935 A EP 10792935A EP 10792935 A EP10792935 A EP 10792935A EP 2519673 A1 EP2519673 A1 EP 2519673A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- motor
- washing machine
- control unit
- detected
- washing
- 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
Links
- 238000005406 washing Methods 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 abstract description 12
- 230000006378 damage Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- D06F58/00—Domestic laundry dryers
- D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
- D06F58/04—Details
- D06F58/08—Driving arrangements
-
- 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
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/08—Control circuits or arrangements thereof
-
- 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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
Definitions
- the present invention relates to a washing machine the safety of which is provided.
- the motor rotates at high speed and generally in one direction. Therefore, the motors are generally designed to draw more current in the direction rotated in the spin-drying step with regard to the other direction and hence to rotate faster.
- the motor is rotated opposite to the spin-drying direction for a long time period and rotated for a short time period in the spin-drying direction in the washing step, thereby providing energy to be consumed less since in total the motor rotates for a longer time in the direction the motor draws less current.
- the motor strains and cannot operate in the desired manner when the load capacity is exceeded or when the type of laundry that absorbs plenty of water like towel, bathrobe, or cotton is loaded.
- a control unit detects that the motor is not operating properly as a result of overloading in the mains voltage or of the washing machine, the motor is stopped and put on standby for a while. Afterwards the motor is energized again and continues operating from where it left off or from the beginning of the program.
- spin-drying when the motor is stopped while rotating in the first direction due to improper operation and operated after a while, it starts rotating in the first direction again. If the problem is not yet corrected, the resulting problem can be much bigger since the motor accelerates in a short time when it starts rotating in the first direction.
- the washing machine realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises a control unit that controls the motor which provides the drum to be rotated clockwise and/or counterclockwise.
- the motor used in the washing machine is designed to draw current at different levels when rotated clockwise or counterclockwise.
- the current drawn in the first of the rotational directions is more than the current drawn in the second direction. The reason is that the motor torque is designed to be greater in the first direction. If an error is detected in the motor starting to rotate in the first direction, the motor is stopped and provided to rotate in the second direction after being kept waiting for a while.
- the motor is stopped and provided to rotate in the second direction.
- Delivering uninterrupted energy supply to the motor as a result of the switch supplying energy to the motor being short circuited causes the motor to accelerate gradually. If the error is not eliminated when the motor is stopped, the motor is rotated in the second direction since rotating the motor in the first direction again will cause the motor to suddenly overaccelerate.
- the motor is stopped in order to prevent heating of the motor.
- the amount of current drawn can be detected without the motor overheating by providing the motor to rotate toward the second direction.
- the program is altogether aborted by deciding that the error cannot be eliminated by stopping.
- the motor is provided to be stopped and rotated in the second direction. Thus, whether or not an error will occur again while the motor starts rotating in the second direction slowly can be detected without jeopardizing safety.
- Figure 1 - is the schematic view of a washing machine.
- Figure 2 - is the schematic view of a switch and a motor.
- the washing machine (1 ) of the present invention comprises a drum (2) wherein the laundry to be washed is placed, a motor (3) providing the drum (2) to rotate in the rotational speed suitable for the washing program that consists of main washing, rinsing and spin-drying steps and a control unit (4) that controls operation of the motor (3) with respect to the washing program selected by the user ( Figure 1).
- the control unit (4) provides the motor (3) to rotate clockwise and/or
- the motor (3) generally rotates successively clockwise for a time period and counterclockwise for a time period in the washing step thereby providing the laundry to be agitated and cleaned in the drum (2).
- the motor (3) In the spin-drying step, the motor (3) generally rotates at high speed toward only one direction since it performs the spin-drying process by rotating at high speed.
- the motor (3) is designed such that the current drawn (11 ) while the motor (3) rotates in the first direction (d1) is greater than the current drawn (I2) while the motor (3) rotates in the second direction (d2). Since the torque of the motor (3) in the first direction (d1 ) is greater and draws more current, the spin-drying process is performed in this direction (d1 ). In the washing step, the motor (3) is rotated for a long time period in the second direction (d2) and for a short time period in the first direction (d1 ), thus less energy is provided to be consumed since the motor (3) rotates in the second direction (d2), that is the direction that the motor (3) draws less current, for a longer time period.
- the control unit (4) monitors the operation of the motor (3) in the washing and spin-drying steps and stops the motor (3) when an error is detected.
- the control unit (4) starts the motor (3) such that the motor (3) rotates in the second direction (d2) after waiting for a time period recorded in the memory thereof.
- the motor (3) is prevented from starting to rotate in the first direction (d1 ) and to overaccelerate until the error is detected again.
- the motor (3) is provided to rotate in the second direction (d2) when operated again and if the problem is not yet overcome before accelerating, the number of revolutions is limited until the error is detected since the motor (3) accelerates slowly in this direction (d2).
- the control unit (4) stops the motor (3) upon detecting that the motor (3) is overaccelerated as a result of short circuiting in the switch (5) and provides the motor (3) to rotate in the second direction (d2) when operated again.
- the short circuiting problem of the switch (5) is not corrected, the error can be detected before the motor (3) accelerates.
- control unit (4) detects that the motor (3) is drawing excessive current, it stops the motor (3) and provides the motor (3) to rotate in the second direction (d2) when operated again.
- the motor (3) draws excessive current by straining due to overloading of the drum (2) or the uneven distribution of laundry in the drum (2).
- the motor (3) is overheated when excessive current is drawn. Heating of the motor (3) shortens the life span thereof. If the laundry clinging to the wall of the drum (2) is not scattered, when the motor (3) is stopped after the control unit (4) detects the problem of the motor (3) drawing excessive current, the drum (2) is prevented from moving in an unbalanced manner by accelerating right away by preventing the motor (3) from rotating in the first direction (d1 ).
- control unit (4) stops the program and alerts the user if the number of errors detected is more than the number recorded in the memory thereof after providing the motor (3) to rotate toward the second direction (d2) upon detection of error.
- control unit (4) provides the program to be resumed in cases when the error can be corrected. In cases when the error cannot be corrected, the control unit (4) warns the user by ending the program so that the error does not damage the washing machine (1 ) or harm the user.
- the motor (3) in case an error is detected while the washing program is executed, the motor (3) is stopped and waited for some time period and the motor (3) is provided to rotate toward the second direction (d2). Consequently, if the error is not eliminated in the time period the motor (3) remains in the stop mode, the motor (3) is prevented from overaccelerating by rotating toward the first direction (d1) and from damaging the washing machine (1 ) until the error is detected.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL10792935T PL2519673T3 (en) | 2009-12-31 | 2010-12-17 | Washing machine with motor overloading protection |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TR200910097 | 2009-12-31 | ||
PCT/EP2010/070048 WO2011080122A1 (en) | 2009-12-31 | 2010-12-17 | Washing machine with motor overloading protection |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2519673A1 true EP2519673A1 (en) | 2012-11-07 |
EP2519673B1 EP2519673B1 (en) | 2013-11-13 |
Family
ID=43797072
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10792935.8A Active EP2519673B1 (en) | 2009-12-31 | 2010-12-17 | Washing machine with motor overloading protection |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2519673B1 (en) |
CN (1) | CN102666961B (en) |
PL (1) | PL2519673T3 (en) |
WO (1) | WO2011080122A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3257995B1 (en) * | 2016-06-13 | 2019-10-23 | Electrolux Appliances Aktiebolag | Method for operating a laundry treatment appliance and laundry treatment appliance |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4686436A (en) * | 1984-07-06 | 1987-08-11 | General Electric Company | Electronic control circuit, electronically commutated motor system and method for controlling same, laundry apparatus, and methods for operating apparatus for switching high voltage DC and for controlling electrical load powering apparatus |
USRE37360E1 (en) * | 1985-09-16 | 2001-09-11 | Fisher & Paykel | Electronic motor controls, laundry machines including such controls and/or methods of operating such controls |
JP3435721B2 (en) * | 1993-03-09 | 2003-08-11 | 松下電器産業株式会社 | Control method of drum type washing machine |
JPH11169582A (en) * | 1997-12-12 | 1999-06-29 | Matsushita Electric Ind Co Ltd | Washing machine |
DE10247900A1 (en) * | 2002-10-14 | 2004-04-22 | Robert Bosch Gmbh | Method and device for the power supply of an electronically commutable electric motor |
KR100651977B1 (en) * | 2003-10-16 | 2006-11-30 | 엘지전자 주식회사 | Method for Controlling Washing Process in Drum Type Washer |
JP4358649B2 (en) * | 2004-02-20 | 2009-11-04 | パナソニック株式会社 | Drum washing machine |
EP2025800B1 (en) * | 2007-08-17 | 2016-04-13 | Electrolux Home Products Corporation N.V. | Electric household appliance |
ATE520813T1 (en) | 2008-03-11 | 2011-09-15 | Electrolux Ab | METHOD FOR LAUNDRY PROCESSING AND APPARATUS FOR LAUNDRY PROCESSING |
DE102008019921A1 (en) * | 2008-04-21 | 2009-10-22 | BSH Bosch und Siemens Hausgeräte GmbH | Domestic appliance for drying laundry items and method for operating such a domestic appliance |
-
2010
- 2010-12-17 PL PL10792935T patent/PL2519673T3/en unknown
- 2010-12-17 CN CN201080060169.6A patent/CN102666961B/en not_active Expired - Fee Related
- 2010-12-17 WO PCT/EP2010/070048 patent/WO2011080122A1/en active Application Filing
- 2010-12-17 EP EP10792935.8A patent/EP2519673B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2011080122A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2519673B1 (en) | 2013-11-13 |
WO2011080122A1 (en) | 2011-07-07 |
CN102666961A (en) | 2012-09-12 |
PL2519673T3 (en) | 2014-05-30 |
CN102666961B (en) | 2015-06-17 |
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