WO2012038311A2 - A washing machine - Google Patents

A washing machine Download PDF

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Publication number
WO2012038311A2
WO2012038311A2 PCT/EP2011/065942 EP2011065942W WO2012038311A2 WO 2012038311 A2 WO2012038311 A2 WO 2012038311A2 EP 2011065942 W EP2011065942 W EP 2011065942W WO 2012038311 A2 WO2012038311 A2 WO 2012038311A2
Authority
WO
WIPO (PCT)
Prior art keywords
door lock
switch
door
washing
mains voltage
Prior art date
Application number
PCT/EP2011/065942
Other languages
French (fr)
Other versions
WO2012038311A3 (en
Inventor
Bulent Efecik
Ufuk Levan Yakut
Original Assignee
Arcelik Anonim Sirketi
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 Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Publication of WO2012038311A2 publication Critical patent/WO2012038311A2/en
Publication of WO2012038311A3 publication Critical patent/WO2012038311A3/en

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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
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
    • 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 
    • D06F39/12—Casings; Tubs
    • D06F39/14—Doors or covers; Securing means therefor
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/20—Parameters relating to constructional components, e.g. door sensors

Definitions

  • the present invention relates to a washing machine wherein the power consumed by the door lock thereof during a washing cycle is reduced.
  • the door which provides access to the drum that provides laundry to be washed by rotating and wherein the laundry is placed is desired to remain locked during the washing time for the user safety. Because, opening of the door by the user during the washing cycle, while the drum is rotating or when the tub is filled with water, causes risk in terms of user safety. Therefore, in washing machines, the door lock which provides the door to remain locked during washing is used. After the rotation of the drum wherein the laundry placed, stops at the end of the washing process, the door is allowed to be opened by the user.
  • the door lock is activated by transmitting the mains voltage to the door lock by means of a switch which is controlled by the microprocessor.
  • the door lock is a mechanical device which moves depending on the temperature, and by energizing the door lock by means of the mains voltage, the bimetal structure therein is provided to move by being heated.
  • the door lock provides the door to be locked by moving.
  • the door lock is provided to be kept locked by continuing to apply mains voltage on the door lock during the washing cycle. Applying mains voltage on the door lock during the washing cycle continuously causes the bimetal structure to be heated more than necessary and the energy consumed to keep the door lock locked to increase.
  • the aim of the present invention is the realization of a washing machine wherein the power consumed in order to keep the door lock locked during the washing cycle is reduced.
  • 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 door lock which provides the door to remain locked while the laundry is washed and to be opened after washing, a microprocessor which controls opening/closing of the door lock and a switch which provides the mains voltage to be transmitted to the door lock .
  • the microprocessor chops or applies intermittently some amount of the mains voltage applied on the switch. The amount of chopping or interruption performed on the mains voltage is determined so as to guarantee that the door lock remains locked for a time predetermined by the producer. Thus, energy saving is provided by reducing the average power consumed by the door lock during the washing time.
  • the switch is a triac.
  • the chopping process on the mains voltage applied on the switch by the microprocessor is easily performed.
  • the switch is a relay. Since the switch performs the opening/closing process slowly in this embodiment, the mains voltage is applied on the switch intermittently and thus the average power consumed by the door lock during the time it remains locked is reduced.
  • the switch is a diode. In this embodiment, since the switch allows the passage of one-way current, the power consumed by the door lock during the time it remains locked is reduced.
  • the washing machine comprises a sensor which is connected to the door lock and which measures the temperature of the door lock during the washing time.
  • the microprocessor compares the door lock temperature values measured by the sensor during the washing time with the critical temperature value predetermined by the producer and which provides the door lock to be kept locked. If the temperature measured by the sensor is greater than the critical temperature, the microprocessor cuts off the mains voltage transmitted to the switch and thus provides the door lock to be kept locked by means of the thermal inertia of the door lock.
  • the average power consumed in order to keep closed the door lock, which provides the door of the washing machine to remain locked during the washing cycle, is reduced and energy saving is provided.
  • Figure 1 – is the perspective view of a washing machine.
  • Figure 2 — is the schematic view of the switch, the door lock and the microprocessor related to an embodiment of the present invention.
  • Figure 3 — is the schematic view of the switch, the door lock and the microprocessor related to another embodiment of the present invention.
  • Figure 4 – is the schematic view of the switch, the door lock and the microprocessor related to another embodiment of the present invention.
  • Figure 5 — is the schematic view of the switch, the door lock, the microprocessor and the sensor related to another embodiment of the present invention.
  • Figure 6 — is the graphics of the normal mains voltage with respect to time.
  • Figure 7 — is the graphics of the mains voltage on which the chopping process is performed with respect to time.
  • Figure 8 — is the graphics of the mains voltage which is applied intermittently with respect to time.
  • the washing machine (1) comprises a drum (2) wherein the laundry is placed, a door (3) providing access to the drum (2), a door lock (4) which prevents the door (3) from being opened by being locked during washing and allowing the door (3) to be opened at the end of the washing process, a switch (5) which provides the mains voltage to be transmitted to the door lock (4) and a microprocessor (6) which regulates the operation of the door lock (4).
  • the switch (5) which is in the passive position when the washing machine (1) does not operate, is changed to the active position at the start of the washing process and provides the door lock (4) to be energized.
  • the door lock (4) is a thermoactuator and when the current is passed through the thermoresistor inside the door lock (4), the bimetal structure in the door lock (4) heats up.
  • the bimetal structure which heats up by the current being passed through the thermoresistor provides the door (3) to be locked by moving.
  • the transmittance of the mains voltage to the door lock (4) by means of the switch (5) is controlled by the microprocessor (6).
  • the microprocessor (6) applies the mains voltage on the switch (5) by chopping at least some amount thereof or intermittently so as to provide the door (3) to be kept locked during a washing cycle ( Figure 7 and Figure 8).
  • the energy of the chopped or intermitted voltage applied by the microprocessor (6) on the door lock (4) by means of the switch (5) is determined so as to guarantee that the door lock (4) is kept closed during the washing cycle.
  • the chopped or intermitted voltage applied on the door lock (4) heats the bimetal structure which is placed in the door lock (4) and which activates the door lock (4) by moving when its temperature reaches a certain level.
  • the thermal inertia of the bimetal structure in the door lock (4) is utilized and the bimetal structure is provided to be cooled by not applying mains voltage on the door lock (4) through the chopping and intermitting intervals of the mains voltage.
  • the magnitude of the temperature of the cooled bimetal structure is sufficient to keep the door lock (4) locked.
  • the bimetal structure in the door lock (4) is prevented from heating more than necessary.
  • the switch (5) is a triac ( Figure 2). Since triac is a switch (5) which has the ability of fast opening/closing, it becomes possible to perform chopping process on the mains voltage ( Figure 7). In each period of the mains voltage in sinusoidal form, the process of chopping is performed in predetermined time intervals. By means of this process which is realized by the microprocessor (6) and which is also named as phase control, the energy consumed by the door lock (4) during the time it remains locked is reduced.
  • the switch (5) is a relay ( Figure 3). Being a switch (5) which performs the opening/closing process slowly, the relay provides the energy consumed by the door lock (4) during the time it remains locked to be reduced by means of applying the mains voltage intermittently ( Figure 8). During this process which is also named as switching, the mains voltage is applied by the microprocessor (6) on the switch (5) by the on-off method. At time intervals predetermined as the result of experimental studies undertaken by the producer and recorded in the memory of the microprocessor (6), the sinusoidal mains voltage is intermitted. Thus, the energy consumed by the door lock (4) during the time it remains locked is reduced. Furthermore, by this method, the noise emitted to the mains is also reduced.
  • the switch (5) is a diode ( Figure 4). Since diode is a switch (5) which allows the passage of one-way current, only the waves of the sinusoidal mains voltage moving in the positive direction or the ones moving in the negative direction are transmitted to the door lock (4) by means of the switch (5). Thus, the power consumed by the door lock (4) is reduced automatically.
  • the washing machine (1) comprises a sensor (7) which is connected to the door lock (4) and which measures the temperature of the door lock (4) during the washing cycle ( Figure 5).
  • the microprocessor (6) determines the position of the switch (5) as open or closed by comparing the temperature value received from the sensor (7) with the critical temperature value which is predetermined by the producer and recorded in the memory of the microprocessor (6) and which provides the door lock (4) to be kept locked.
  • the microprocessor (6) provides the door lock (4) to be energized by transmitting the mains voltage to the door lock (4) by means of the switch (5).
  • the microprocessor (6) cuts off the energy of the door lock (4) by means of the switch (5) and provides the door lock (4) to remain locked by means of the thermal inertia of the door lock (4) accumulated on itself. Since no energy is transmitted to the door lock (4) during this period, the energy consumed by the door lock (4) throughout the washing cycle is reduced.
  • the microprocessor (6) provides the door lock (4) to be energized by triggering the switch (5) again.
  • the present invention by means of chopping or intermitting the mains voltage applied to the door lock (4) throughout the washing cycle, the amount of energy consumed by the door lock (4) is reduced.

Abstract

The present invention relates to a washing machine (1 ) comprising a drum (2) wherein the laundry is placed, a door (3) providing access to the drum (2), a door lock (4) which prevents the door (3) from being opened by being locked during washing and allowing the door (3) to be opened at the end of the washing process, a switch (5) which provides the mains voltage to be transmitted to the door lock (4) and a microprocessor (6) which regulates the operation of the door lock (4).

Description

A WASHING MACHINE
The present invention relates to a washing machine wherein the power consumed by the door lock thereof during a washing cycle is reduced.
In washing machines, the door which provides access to the drum that provides laundry to be washed by rotating and wherein the laundry is placed is desired to remain locked during the washing time for the user safety. Because, opening of the door by the user during the washing cycle, while the drum is rotating or when the tub is filled with water, causes risk in terms of user safety. Therefore, in washing machines, the door lock which provides the door to remain locked during washing is used. After the rotation of the drum wherein the laundry placed, stops at the end of the washing process, the door is allowed to be opened by the user.
In the state of the art, the door lock is activated by transmitting the mains voltage to the door lock by means of a switch which is controlled by the microprocessor. The door lock is a mechanical device which moves depending on the temperature, and by energizing the door lock by means of the mains voltage, the bimetal structure therein is provided to move by being heated. When the temperature of the bimetal structure reaches a sufficient level, the door lock provides the door to be locked by moving. The door lock is provided to be kept locked by continuing to apply mains voltage on the door lock during the washing cycle. Applying mains voltage on the door lock during the washing cycle continuously causes the bimetal structure to be heated more than necessary and the energy consumed to keep the door lock locked to increase.
The aim of the present invention is the realization of a washing machine wherein the power consumed in order to keep the door lock locked during the washing cycle is reduced.
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 door lock which provides the door to remain locked while the laundry is washed and to be opened after washing, a microprocessor which controls opening/closing of the door lock and a switch which provides the mains voltage to be transmitted to the door lock. In order to reduce the average power consumed by the door lock during the time wherein the door lock remains locked, the microprocessor chops or applies intermittently some amount of the mains voltage applied on the switch. The amount of chopping or interruption performed on the mains voltage is determined so as to guarantee that the door lock remains locked for a time predetermined by the producer. Thus, energy saving is provided by reducing the average power consumed by the door lock during the washing time.
In an embodiment of the present invention, the switch is a triac. Thus, the chopping process on the mains voltage applied on the switch by the microprocessor is easily performed.
In an embodiment of the present invention, the switch is a relay. Since the switch performs the opening/closing process slowly in this embodiment, the mains voltage is applied on the switch intermittently and thus the average power consumed by the door lock during the time it remains locked is reduced.
In an embodiment of the present invention, the switch is a diode. In this embodiment, since the switch allows the passage of one-way current, the power consumed by the door lock during the time it remains locked is reduced.
In another embodiment of the present invention, the washing machine comprises a sensor which is connected to the door lock and which measures the temperature of the door lock during the washing time. The microprocessor compares the door lock temperature values measured by the sensor during the washing time with the critical temperature value predetermined by the producer and which provides the door lock to be kept locked. If the temperature measured by the sensor is greater than the critical temperature, the microprocessor cuts off the mains voltage transmitted to the switch and thus provides the door lock to be kept locked by means of the thermal inertia of the door lock.
By means of the present invention, the average power consumed in order to keep closed the door lock, which provides the door of the washing machine to remain locked during the washing cycle, is reduced and energy saving is provided.
The washing machine realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
Figure 1 – is the perspective view of a washing machine.
Figure 2 – is the schematic view of the switch, the door lock and the microprocessor related to an embodiment of the present invention.
Figure 3 – is the schematic view of the switch, the door lock and the microprocessor related to another embodiment of the present invention.
Figure 4 – is the schematic view of the switch, the door lock and the microprocessor related to another embodiment of the present invention.
Figure 5 – is the schematic view of the switch, the door lock, the microprocessor and the sensor related to another embodiment of the present invention.
Figure 6 – is the graphics of the normal mains voltage with respect to time.
Figure 7 – is the graphics of the mains voltage on which the chopping process is performed with respect to time.
Figure 8 – is the graphics of the mains voltage which is applied intermittently with respect to time.
The elements illustrated in the figures are numbered as follows:
  1. Washing machine
  2. Drum
  3. Door
  4. Door lock
  5. Switch
  6. Microprocessor
  7. Sensor
The washing machine (1) comprises a drum (2) wherein the laundry is placed, a door (3) providing access to the drum (2), a door lock (4) which prevents the door (3) from being opened by being locked during washing and allowing the door (3) to be opened at the end of the washing process, a switch (5) which provides the mains voltage to be transmitted to the door lock (4) and a microprocessor (6) which regulates the operation of the door lock (4).
The switch (5), which is in the passive position when the washing machine (1) does not operate, is changed to the active position at the start of the washing process and provides the door lock (4) to be energized. The door lock (4) is a thermoactuator and when the current is passed through the thermoresistor inside the door lock (4), the bimetal structure in the door lock (4) heats up. In the door lock (4), which comprises a device moving mechanically depending on the temperature, the bimetal structure which heats up by the current being passed through the thermoresistor provides the door (3) to be locked by moving. The transmittance of the mains voltage to the door lock (4) by means of the switch (5) is controlled by the microprocessor (6).
In the washing machine (1) of the present invention, the microprocessor (6) applies the mains voltage on the switch (5) by chopping at least some amount thereof or intermittently so as to provide the door (3) to be kept locked during a washing cycle (Figure 7 and Figure 8). The energy of the chopped or intermitted voltage applied by the microprocessor (6) on the door lock (4) by means of the switch (5) is determined so as to guarantee that the door lock (4) is kept closed during the washing cycle. The chopped or intermitted voltage applied on the door lock (4) heats the bimetal structure which is placed in the door lock (4) and which activates the door lock (4) by moving when its temperature reaches a certain level. By means of chopping the mains voltage or applying it intermittently, the thermal inertia of the bimetal structure in the door lock (4) is utilized and the bimetal structure is provided to be cooled by not applying mains voltage on the door lock (4) through the chopping and intermitting intervals of the mains voltage. The magnitude of the temperature of the cooled bimetal structure is sufficient to keep the door lock (4) locked. Thus, the bimetal structure in the door lock (4) is prevented from heating more than necessary. By means of applying the mains voltage on the switch (5) by chopping or intermittently, the total energy consumed for keeping the door lock (4) locked during the washing cycle is reduced. Thus, the door lock (4) is provided to be kept locked by consuming less energy and energy saving is provided.
In an embodiment of the present invention, the switch (5) is a triac (Figure 2). Since triac is a switch (5) which has the ability of fast opening/closing, it becomes possible to perform chopping process on the mains voltage (Figure 7). In each period of the mains voltage in sinusoidal form, the process of chopping is performed in predetermined time intervals. By means of this process which is realized by the microprocessor (6) and which is also named as phase control, the energy consumed by the door lock (4) during the time it remains locked is reduced.
In another embodiment of the present invention, the switch (5) is a relay (Figure 3). Being a switch (5) which performs the opening/closing process slowly, the relay provides the energy consumed by the door lock (4) during the time it remains locked to be reduced by means of applying the mains voltage intermittently (Figure 8). During this process which is also named as switching, the mains voltage is applied by the microprocessor (6) on the switch (5) by the on-off method. At time intervals predetermined as the result of experimental studies undertaken by the producer and recorded in the memory of the microprocessor (6), the sinusoidal mains voltage is intermitted. Thus, the energy consumed by the door lock (4) during the time it remains locked is reduced. Furthermore, by this method, the noise emitted to the mains is also reduced.
In another embodiment of the present invention, the switch (5) is a diode (Figure 4). Since diode is a switch (5) which allows the passage of one-way current, only the waves of the sinusoidal mains voltage moving in the positive direction or the ones moving in the negative direction are transmitted to the door lock (4) by means of the switch (5). Thus, the power consumed by the door lock (4) is reduced automatically.
In another embodiment of the present invention, the washing machine (1) comprises a sensor (7) which is connected to the door lock (4) and which measures the temperature of the door lock (4) during the washing cycle (Figure 5). The microprocessor (6) determines the position of the switch (5) as open or closed by comparing the temperature value received from the sensor (7) with the critical temperature value which is predetermined by the producer and recorded in the memory of the microprocessor (6) and which provides the door lock (4) to be kept locked. When the temperature measured by the sensor (7) is below the critical temperature, the microprocessor (6) provides the door lock (4) to be energized by transmitting the mains voltage to the door lock (4) by means of the switch (5). When the temperature measured by the sensor (7) rises over the critical temperature, the microprocessor (6) cuts off the energy of the door lock (4) by means of the switch (5) and provides the door lock (4) to remain locked by means of the thermal inertia of the door lock (4) accumulated on itself. Since no energy is transmitted to the door lock (4) during this period, the energy consumed by the door lock (4) throughout the washing cycle is reduced. When the temperature measured by the sensor (7) reaches the critical temperature value again, the microprocessor (6) provides the door lock (4) to be energized by triggering the switch (5) again. Thus, with a temperature feedback control method, the energy consumed by the door lock (4) throughout the washing cycle is reduced and energy saving is provided.
With the present invention, by means of chopping or intermitting the mains voltage applied to the door lock (4) throughout the washing cycle, the amount of energy consumed by the door lock (4) is reduced.
It is to be understood that the present invention is not limited to the embodiments disclosed above and a person skilled in the art can easily introduce different embodiments. These should be considered within the scope of the protection postulated by the claims of the present invention.

Claims (5)

  1. A washing machine (1) comprising a drum (2) wherein the laundry is placed, a door (3) providing access to the drum (2), a door lock (4) which prevents the door (3) from being opened by being locked during washing and allowing the door (3) to be opened at the end of the washing process, a switch (5) which provides the mains voltage to be transmitted to the door lock (4) and a microprocessor (6) which regulates the operation of the door lock (4),
    characterized by the microprocessor (6) which applies the mains voltage on the switch (5) by chopping at least some amount of the mains voltage or intermittently so as to provide the door (4) to be kept locked during a washing cycle.
  2. A washing machine (1) as in Claim 1, characterized by the switch (5) which is a triac.
  3. A washing machine (1) as in Claim 1, characterized by the switch (5) which is a relay.
  4. A washing machine (1) as in Claim 1, characterized by the switch (5) which is a diode.
  5. A washing machine (1) as in any one of the above Claims, characterized by a sensor (7) which is connected to the door lock (4) and which measures the temperature of the door lock (4) during the washing cycle, and the microprocessor (6) which determines the position of the switch (5) as open or closed by comparing the temperature value received from the sensor (7) with the critical temperature value which is predetermined by the producer and which provides the door lock (4) to be kept locked.
PCT/EP2011/065942 2010-09-22 2011-09-14 A washing machine WO2012038311A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2010/07760A TR201007760A1 (en) 2010-09-22 2010-09-22 A washing machine.
TRA2010/07760 2010-09-22

Publications (2)

Publication Number Publication Date
WO2012038311A2 true WO2012038311A2 (en) 2012-03-29
WO2012038311A3 WO2012038311A3 (en) 2012-05-18

Family

ID=44645122

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/065942 WO2012038311A2 (en) 2010-09-22 2011-09-14 A washing machine

Country Status (2)

Country Link
TR (1) TR201007760A1 (en)
WO (1) WO2012038311A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012010929A1 (en) * 2012-06-01 2013-08-01 Emz-Hanauer Gmbh & Co. Kgaa Closure device for door of domestic washing machine has latch actuation circuit that is adapted for exciting phase of coil assembly to create voltage signal with respect to supply voltage modified temporal amplitude profile

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1267583B1 (en) * 1994-09-13 1997-02-07 Zanussi Elettrodomestici LAUNDRY WASHING MACHINE WITH PERFECTED COMMAND AND CONTROL DEVICES
DE102005049892B3 (en) * 2005-10-17 2007-05-03 Diehl Ako Stiftung & Co. Kg Circuit for controlling a device for laundry treatment
DE102008019919A1 (en) * 2008-04-21 2009-10-22 BSH Bosch und Siemens Hausgeräte GmbH Circuit arrangement for operating a door lock device and corresponding method
IT1392257B1 (en) * 2008-12-05 2012-02-22 Illinois Tool Works SAFETY CONTROL SYSTEM FOR AN ELECTROMAGNETIC DOOR BLOCK OF A HOUSEHOLD APPLIANCE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012010929A1 (en) * 2012-06-01 2013-08-01 Emz-Hanauer Gmbh & Co. Kgaa Closure device for door of domestic washing machine has latch actuation circuit that is adapted for exciting phase of coil assembly to create voltage signal with respect to supply voltage modified temporal amplitude profile
DE102012010929B4 (en) * 2012-06-01 2020-02-13 Emz-Hanauer Gmbh & Co. Kgaa Locking device for a door of a domestic washing machine

Also Published As

Publication number Publication date
TR201007760A1 (en) 2012-04-24
WO2012038311A3 (en) 2012-05-18

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