EP1899525A1 - Wasch-/trockenvorrichtung und steuerungsverfahren dafür - Google Patents

Wasch-/trockenvorrichtung und steuerungsverfahren dafür

Info

Publication number
EP1899525A1
EP1899525A1 EP06780021A EP06780021A EP1899525A1 EP 1899525 A1 EP1899525 A1 EP 1899525A1 EP 06780021 A EP06780021 A EP 06780021A EP 06780021 A EP06780021 A EP 06780021A EP 1899525 A1 EP1899525 A1 EP 1899525A1
Authority
EP
European Patent Office
Prior art keywords
electric motor
heater
washer
dryer
tmax
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
EP06780021A
Other languages
English (en)
French (fr)
Other versions
EP1899525B1 (de
Inventor
Hakan Ozkahraman
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Publication of EP1899525A1 publication Critical patent/EP1899525A1/de
Application granted granted Critical
Publication of EP1899525B1 publication Critical patent/EP1899525B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/50—Control of washer-dryers characterised by the purpose or target of the control
    • D06F33/74—Responding to irregular working conditions, e.g. malfunctioning of pumps 
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/32—Temperature
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/34—Humidity
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/36—Flow or velocity
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/44—Current or voltage
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/44—Current or voltage
    • D06F2103/46—Current or voltage of the motor driving the drum
    • 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
    • D06F2105/16—Air properties
    • D06F2105/24—Flow or velocity
    • 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
    • D06F2105/30—Blowers
    • 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
    • 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
    • D06F2105/58—Indications or alarms to the control system or to the user
    • 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
    • D06F2105/58—Indications or alarms to the control system or to the user
    • D06F2105/60—Audible signals
    • 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
    • D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 
    • 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
    • D06F34/28—Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress

Definitions

  • the present invention relates to a washer/dryer wherein possible failures due to reasons such as voltage drops or overloading are prevented and a control method thereof.
  • the laundry to be dried is placed inside a drum actuated by an electric motor and the air heated by a heater is blown over for drying.
  • the electric motor rotating the drum tries to overcome this extra torque and starts heating.
  • the motor temperature is detected by a thermal unit (thermal protector) situated on the windings and when a certain temperature value is exceeded, the thermal element cuts off the current to the motor, stopping the motor.
  • the electric motor activating the drum generally also activates the fan that provides blowing hot air over the laundry.
  • the temperature of the heater is controlled by continuously blowing air over it during the drying process.
  • the fan blowing air over the heater also stops and since the current continues to flow to the heater, it continues to be heated.
  • the thermostats controlling the temperature of heater are energized and cut off the current delivered to the heater for providing safety.
  • various safety systems are utilized that are energized in case the motor and the heater are overheated.
  • the thermal unit cuts off the current, stopping the electric motor, however even if the electric motor is safeguarded by the thermal unit against overheating, it nevertheless operates in overload conditions for a long time and the motor windings are impaired. When this condition is repeated frequently, it reduces the life of the electric motor.
  • the washer/dryers have to operate with low voltage.
  • the electric motor driving the drum with low voltage
  • modifications are made in the electronic card that controls the operation of the motor and the motor is enabled to operate with low voltage.
  • the electric motor can be strained while rotating the drum even if the amount of laundry loaded in the drum stays within the normal limits and continues to be heated until the thermal element cuts off the current.
  • a motor safety device switches off the drive motor of the washing machine drum in the event of a failure affecting the motor.
  • an electrical switching element controls a protective switch arranged in the current circuit of the drying heater which switches off the current of the heater.
  • a safety device for a laundry drier is adapted to cut the electric power supply to the machine in case of insufficient or totally absent drying air circulation due to clogging of the filter and/or stoppage of the electric motor of the blower and the drum caused by failure or functional defects of the motor.
  • the aim of the present invention is the realization of a washer/dryer, wherein the electric motor actuating the drum is prevented from malfunction resulting from low network voltage and/or overloading of the drum and a control method thereof.
  • the washer/dryer is operated after the laundry is loaded into the drum and as the drum spins the laundry inside making a rotating movement, a fan driven by an electric motor blows air over the heater and the heated air is blown over the laundry.
  • a heat sensor detects the rise in the temperature of the heater and sends a signal to the control card that controls the operation of the motor and the control card immediately cuts off the current to the electric motor.
  • the thermal protector provides safeguarding against overheating, the thermal protector is not awaited to cut off the current and consequently the overheating of the motor windings leading to a reduction of the motor life is prevented.
  • the voltage from the network should be checked whether it is low or not. If the voltage is low, then it is determined that the reason for the motor strain is due to low voltage, if not then the electric motor is strained from another cause. In this case there is a stand by period until the voltage rises and the user is warned by a low voltage warning unit.
  • the electric motor driving the fan is also utilized in rotating the drum.
  • Figure 1 - is the schematic view of a washer/dryer.
  • Figure 2 - is the flow chart of a washer/dryer control method
  • the washer/dryer (1) comprises a drum (2) wherein laundry (L) is loaded, a fan (4) for blowing air on the laundry to be dried, an electric motor (3) driving the fan (4), a heater (5) providing heating of the drying air blown over the laundry (L), a heat sensor (6) positioned near the heater (5) for detecting the temperature in the vicinity of the heater (5), a thermal protector (7) that cuts off the current (I) to the electric motor (3) in the event that the electric motor (3) is overheated due to over straining, a start button (8) providing the user to start the drying process and a control card (9) that controls the operation.
  • the control card (9) determines that the fan (4) driven by the electric motor (3) is not rotated at the required speed and the temperature (T) in the vicinity of the heater (5) has increased due to insufficient amount of air blown over the heater (5) and the current (I) delivered to the electric motor (3) is cut off.
  • the current (I) delivered to the electric motor (3) strained in rotating the fan (4) and thus starting to be heated is cut off by the control card (9) before the thermal protector (7), without waiting for the thermal protector (7) to stop it.
  • the reason for the electric motor (3) strain is investigated and first of all the network voltage (V) is controlled for whether or not it is lower (V ⁇ Vd ?) than a limit low voltage value (Vd) where the electric motor (3) can operate without a problem.
  • the control card (9) detects that the network voltage is low (V ⁇ Vd), then it is determined that this factor is the reason for the electric motor (3) strain and the electric motor (3) is operated after the voltage (V) rises. If the network voltage is not low (V > Vd), then it is inferred that the strain of the electric motor (3) is due to another factor.
  • the washer/dryer (1) comprises a low voltage warning unit (10) that warns the user in case of low voltage values (V ⁇ Vd). If the electric motor (3) is strained or stopped due to low voltage (V ⁇ Vd), the user is warned by means of the low voltage warning unit (10) while awaiting for the voltage (V) to rise. [0024] In another embodiment of the present invention, the electric motor (3) is utilized for actuating both the fan (4) and the drum (2).
  • the washer/dryer (1) comprises a load warning unit (11) that warns the user to reduce the load (L) in an audio and/or visual manner when the load (L) is detected to be excessive. The user is warned by the load warning unit (11) in an audio and/or visual manner to reduce the load (L) and after the user reduces the load (L), the washer/dryer (1) can be restarted by pushing the start button (8).
  • the washer/dryer (1) control method comprises the following steps: The heater (5) and the electric motor (3) are operated according to the drying algorithm (100).
  • the temperature (T) in the vicinity of the heater (5) is measured by the heat sensor (6) (101).
  • the electric motor (3) is strained in rotating the fan (4) and if the temperature (T) in the vicinity of the heater (5) exceeds the value Tmax, then the electric motor (3) is stopped.
  • the control card (9) determines that the load (L) is greater than the operational conditions because of the algorithm requirement even though the load (L) is normal and the load warning unit (11) is energized to warn the user for reducing the load (L). Consequently in regions where the voltage (V) is always low, the user is provided with the opportunity to operate the washer/dryer (1) without problems with a little less than normal load (L).

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP06780021.9A 2005-07-05 2006-07-05 Wasch-/trockenvorrichtung und steuerungsverfahren dafür Not-in-force EP1899525B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200502616 2005-07-05
PCT/IB2006/052261 WO2007004198A1 (en) 2005-07-05 2006-07-05 A washer/dryer and a control method

Publications (2)

Publication Number Publication Date
EP1899525A1 true EP1899525A1 (de) 2008-03-19
EP1899525B1 EP1899525B1 (de) 2015-03-04

Family

ID=37216029

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06780021.9A Not-in-force EP1899525B1 (de) 2005-07-05 2006-07-05 Wasch-/trockenvorrichtung und steuerungsverfahren dafür

Country Status (2)

Country Link
EP (1) EP1899525B1 (de)
WO (1) WO2007004198A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8441248B2 (en) 2010-10-21 2013-05-14 Whirlpool Corporation Laundry treating appliance with voltage detection
US8555522B2 (en) 2010-10-21 2013-10-15 Whirlpool Corporation Laundry treating appliance with inlet temperature compensation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3543213A1 (de) * 1985-12-06 1987-06-11 Bosch Siemens Hausgeraete Schaltungsanordnung zum schutz vor ueberhitzung einer waeschetrommel
IT1220063B (it) * 1987-10-14 1990-06-06 Zanussi A Spa Industrie Dispositivo di sicurezza per macchina asciugabiancheria

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007004198A1 *

Also Published As

Publication number Publication date
WO2007004198A1 (en) 2007-01-11
EP1899525B1 (de) 2015-03-04
WO2007004198A8 (en) 2007-05-03

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