EP3382083A1 - Verfahren zur bestimmung von schaum in einer waschmaschine - Google Patents

Verfahren zur bestimmung von schaum in einer waschmaschine Download PDF

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Publication number
EP3382083A1
EP3382083A1 EP17162965.2A EP17162965A EP3382083A1 EP 3382083 A1 EP3382083 A1 EP 3382083A1 EP 17162965 A EP17162965 A EP 17162965A EP 3382083 A1 EP3382083 A1 EP 3382083A1
Authority
EP
European Patent Office
Prior art keywords
foam
rotational speed
drive motor
washing machine
detected
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.)
Withdrawn
Application number
EP17162965.2A
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English (en)
French (fr)
Inventor
Irfan KARAZOR
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.)
Vestel Elektronik Sanayi ve Ticaret AS
Original Assignee
Vestel Elektronik Sanayi ve Ticaret 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 Vestel Elektronik Sanayi ve Ticaret AS filed Critical Vestel Elektronik Sanayi ve Ticaret AS
Priority to EP17162965.2A priority Critical patent/EP3382083A1/de
Priority to TR2017/04786A priority patent/TR201704786A2/tr
Publication of EP3382083A1 publication Critical patent/EP3382083A1/de
Withdrawn legal-status Critical Current

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    • 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 
    • D06F39/06—Arrangements for preventing or destroying scum
    • 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 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/36—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of washing
    • 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
    • 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
    • D06F2103/30—Pressure
    • 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 invention refers to a method for determining foam according to claim 1, an arrangement for determining foam according to claim 9, and a washing machine according to claim 15.
  • washing detergents, and other similar products such as fabric softeners, etc are used in washing laundry in a washing machine.
  • the user adds the detergents and other optional washing or laundry treatment agents, such as fabric softeners, to the washing machine before commencing washing operation of the washing machine.
  • the detergents and other agents carry specific instructions on amounts to be used for different loads, different types of laundry i.e. how dirty or clean the clothes are, and different washing operations for example washing using hot water at 60°C or washing using non heated water or washing using water at 45°C, and so on and so forth, often it is difficult to exactly add an optimum amount of detergent.
  • the action and consumption of the detergent may be different owing to different modes/operations selected by the user to perform washing, and other factors such as water hardness, or interplay between different agents added for example between a detergent and fabric softener, and thus the detergent and other chemical agents aiding washing may not be present in optimal amounts.
  • the spin cycle involves high speed rotation of the drum to remove residual water and detergents from the laundry and leave the laundry in with as little water as possible at the end of the spin cycle.
  • the highest speed rotation of the drum during end of spin cycle is performed to remove residual water, as at this stage the laundry is assumed or intended to be free of detergents, and optionally added other chemical agents aiding washing, which have been attempted to be removed from the laundry towards the end of washing cycle or before commencement of the spin cycle at highest rotation speeds, by rinsing the laundry and removing the wash liquor, i.e. solution of detergent and other optionally added chemical agents to aid washing, one or more times.
  • the washing machine of WO2009016009 includes a sensor for determining a foam level and/or a negative time gradient of the foam level present in the detergent solution tub, wherein a small amount of water is added continuously or discontinuously, with a detergent solution pump switched on continuously or discontinuously, when foam, i.e. liquid-air mixture, is detected by the sensor during a spinning run-up of the drum, that is, a continuous or continuous increase in the rotational speed of the drum.
  • foam sensors are based on pressure sensing or measuring a pressure in the external tub, also referred to as the suds container or tub.
  • the foam amounts are sensed as corresponding to an increase in pressure of the external tub.
  • These conventional techniques for foam detection based on pressure sensing i.e. excessive foam is detected to be present when pressure as sensed by the foam sensor exceeds a limit or a threshold. which is used to register the presence of foam, and generally for triggering a foam elimination measure.
  • foam sensor generally includes a housing and an air pipe or tubing connected to an air dome or container that is in turn connected to the drum or the external tub i.e. the suds container. The air is compressed in the air tubing resulting from the pressure inside the drum or the external tub and thus pressure is sensed by the pressure sensor.
  • the aforementioned sensing technique is prone to errors, i.e. to providing wrong conclusions.
  • the pressure as detected by the foam sensor may result from other factors besides aggregation or buildup of foam such as, by increased air pressure within the suds container or external tub resulting from rotation of the drum and by residual water arising during the spin cycle and which instead of getting drained out of the washing machine gets trapped within the drum or suds container due to inertia of rotation.
  • a increased pressure sensed by the foam sensor due to the aforementioned factors result in a false detection of foam amount in the washing machine, although there may not be excessive amounts of foam present.
  • It is therefore an object of the present invention is to provide a technique of foam detection that reduces chances of false detection of foam level thresholds.
  • the aforementioned object is achieved by a method for determining foam according to claim 1 of the present technique, which presents a first aspect of the present technique.
  • the basic idea of the present technique is to perform a foam determination based on a spin speed i.e. rotational speed of a drive motor that spins the drum accordingly and on output of a foam sensor.
  • the threshold level for determining the presence of excessive amount of foam and thus consequently determining that a foam elimination mechanism needs to be engaged is different for different motor spin speeds.
  • a threshold level for example a first threshold level, of pressure for deriving or determining presence of excessive amount of foam and thus consequently engaging a foam elimination mechanism is lesser than a threshold level, for example a second threshold level, of pressure for deriving or determining presence of excessive amount of foam and thus consequently engaging the foam elimination mechanism when the drum is being rotated at higher spin speed or rotational speed.
  • a controller or control unit of the washing machine checks the rotational speed of the motor and the corresponding threshold level of pressure and compares a reading or output of the foam sensor with this threshold level to determine if there is a need to engage a foam elimination mechanism or not.
  • the phrases 'motor speed', 'spin speed of the motor', 'motor spin speed', 'rotational speed of the motor', or simply 'speed of the motor' or 'motor speed' mean one and the same thing, and may be understood as the rate of rotations performed by the motor driving the rotation of the drum.
  • the washing machine has a controller, a drum rotatable mounted in a detergent solution tub, a wash solution discharge system, a drive motor for rotation of the drum, and a pressure based foam sensor for detecting a level of foam based on sensing pressure.
  • a foam level is detected by the foam sensor.
  • the foam sensor detects the level of foam based on sensing of pressure of the detergent solution tub.
  • the foam sensor determines or detects or senses the level or amount of foam, and any such specific determination or detected reading is referred to as the foam level.
  • the foam level is detected for a given time instance.
  • a rotational speed of the drive motor is detected.
  • the rotational speed of the drive motor is detected also for the given time instance i.e. the foam level and the rotational speed correspond to the same time instance, or in other words are detected at the same time instance.
  • a threshold value corresponding to the rotational speed of the drive motor so detected is determined.
  • the foam level detected by the foam sensor for the given time instance is compared to the threshold value so determined for the given time instance.
  • the controller is programmed to conclude that foam is determined as present in the washing machine, if the foam level detected by the foam sensor is equal to or greater than the threshold value.
  • the corresponding threshold value for a given rotational speed of the drum is so decided or fixed or predetermined so as to include due consideration of the effects of rotation of the drum on the pressure inside the drum.
  • the phrase 'determined as present' and like phrases with respect to the foam mean present in such an amount or to such a level or degree so as to require initiation or implementation or continuation of foam eliminating mechanism within the washing machine.
  • the method of the present technique ensures that in determining presence of the foam, the effects of rotation of the drum are considered, through fixing an appropriate threshold value for a given rotational speed.
  • these effects of rotation of the drum include increased air pressure within the detergent solution tub, also otherwise known as the suds container or external tub, and increased air pressure due to spinning residual water arising during the spin cycle and which instead of getting drained out of the washing machine gets trapped within the detergent solution tub and/or the drum due to inertia of rotation of the drum.
  • the rotational speed is detected by measuring the rotational speed by using a tachometer or a tachometer generator.
  • a tachometer or a tachometer generator This provides a simple and cost effective way of implementing the method, as tachometers and tachometer generators, also known as tachogenerators, are well known, easy to operate and integrate, are cost effective and have small footprints.
  • the tachometer or the tachometer generator may be contact type or non-contact type.
  • the foam sensor is calibrated prior to detecting the foam level by the foam sensor for the given time instance.
  • the foam sensor is calibrated after the wash solution is drained out through the wash solution discharge system i.e. when there is substantially no water or very minimal water or wash liquor present in the drum and the detergent solution tub.
  • the foam sensor reading offsets any effect of previously present water or wash liquor in the drum and the detergent solution tub that is drained out before the foam level is detected for the given time instance.
  • the foam sensor is calibrated while the drum is stationary. Thus the foam sensor reading offsets any effect of increased pressure resulting from the rotation of the drum before the foam level is detected for the given time instance.
  • the threshold value corresponding to the rotational speed of the drive motor is determined by using a lookup table enlisting different rotational speeds of the drive motor and a corresponding threshold value for each of the different rotational speeds. This is a simple array indexing operation as compared to runtime computation and thus the method is quicker and computationally less intensive.
  • the threshold value corresponding to the rotational speed of the drive motor is determined by computing using linear regression.
  • the aforementioned objective is also achieved by an arrangement for determining foam according to claim 9, which presents a second aspect of the present technique.
  • the arrangement is for determining foam in a drum-type washing machine during spin cycle of operation of the washing machine is presented.
  • the washing machine includes a drum rotatable mounted in a detergent solution tub, a wash solution discharge system, and a drive motor for rotation of the drum.
  • the arrangement includes a foam sensor, a rotational speed detecting mechanism, and a controller.
  • the foam sensor detects level of foam based on sensing of pressure of the detergent solution tub.
  • the foam sensor determines or detects or senses the level or amount of foam, and any such specific determination or detected reading is referred to as the foam level.
  • the level or amount of foam detected at a given time instance is referred to as the foam level detected for the given time instance or the foam level detected at the given time instance or the foam level corresponding to the given time instance, and similar phrases.
  • the rotational speed detecting mechanism detects a speed of rotation of the drive motor.
  • the rotational speed detecting mechanism determines or detects or senses the speed of rotation of the drive motor, and any such specific determination or detected reading is referred to as the rotational speed.
  • the speed of rotation of the drive motor detected at a given time instance is referred to as the rotational speed detected for the given time instance or the rotational speed detected at the given time instance or the rotational speed corresponding to the given time instance, and similar phrases.
  • the controller controls the foam sensor and the rotational speed detecting mechanism such that a foam level is detected by the foam sensor and a rotational speed of the drive motor is detected by the rotational speed detecting mechanism for a given time instance, i.e. the foam level and the rotational speed are detected simultaneously.
  • the foam level and the rotational speed correspond to the same time instance, or are detected at the same time instance.
  • the controller determines a threshold value corresponding to the rotational speed of the drive motor detected by the rotational speed detecting mechanism and thereafter compares the foam level detected by the foam sensor to the threshold value so determined.
  • the controller assess or concludes that foam is present or foam is determined to be present in the washing machine if the foam level detected by the foam sensor is equal to or greater than the threshold value.
  • the phrase 'determined as present' or 'determined to be present' and like phrases with respect to the foam mean present or existing in such an amount or to such a level or degree so as to require initiation or implementation or continuation of foam eliminating mechanism within the washing machine.
  • the arrangement of the present technique ensures that in determining presence of the foam, the effects of rotation of the drum are considered, through fixing an appropriate threshold value for a given rotational speed.
  • the rotational speed detecting mechanism is a tachometer or a tachometer generator.
  • the tachometer or the tachometer generator may be contact type or non-contact type. This provides a simple, efficient and cost effective arrangement, as tachometers and tachometer generators are well known, easy to operate and integrate, are cost effective, energy efficient and have small footprints.
  • the arrangement includes a memory module.
  • the memory module stores a lookup table.
  • the lookup table enlists different rotational speeds of the drive motor and a corresponding threshold value for each of the different rotational speeds.
  • the controller determines the threshold value corresponding to the rotational speed of the drive motor by using the lookup table.
  • the controller determines the threshold value corresponding to the rotational speed of the drive motor by computing using linear regression.
  • the aforementioned objective is also achieved by a drum-type washing machine according to claim 15, which presents a third aspect of the present technique.
  • the drum-type washing machine hereinafter also referred to as the washing machine, includes a drum rotatable mounted in a detergent solution tub, a wash solution discharge system, and a drive motor for rotation of the drum and an arrangement for determining foam in during spin cycle of operation of the washing machine according to the aforementioned second aspect of the present technique.
  • Fig. 1 presents a flow chart representing an exemplary embodiment of a method 100 of the present technique.
  • the method 100 is explained hereinafter in combination with an arrangement 1 of Fig. 2 and a drum-type washing machine 99 of Fig. 3 in which the arrangement 1 is present.
  • the drum-type washing machine 99 hereinafter also referred to as the washing machine 99 includes a detergent solution tub 4, also referred to as an external tub or suds container, a drum 3 for accommodating laundry through an opening 8 of the drum 3.
  • the drum 3 is rotatable mounted within the detergent solution tub 4, hereinafter also referred to as the tub 4.
  • the washing machine 99 also includes a drive motor 5. From the drive motor 5 extends a drive shaft 6.
  • the drive shaft 6 passes though the tub 4 and connects to the drum 3.
  • the drive shaft 6 rotationally couples the drum 3 with the drive motor 5.
  • the washing machine 99 has a wash solution discharge system 7 through which wash liquor is drained out of the washing machine 99.
  • the washing machine 99 also comprises other parts (not shown) that are required for functioning of such washing machines, such as inlet water pipe, detergent delivery mechanisms, water heating elements, etc.
  • the arrangement 1 shown in Fig. 2 includes a foam sensor 10, a rotational speed detection mechanism 20 and a controller 30.
  • the arrangement 1 may optionally include a memory module 40.
  • he arrangement 1 is employed for determining foam in the washing machine 99 during spin cycle of operation of the washing machine 99.
  • the arrangement 1 forms a part of the washing machine 99 as shown schematically in Fig 3 .
  • the controller 30 of the arrangement 1 may be part of control console (not shown) of the washing machine 99.
  • the control console receives user selected inputs, for example washing time, washing water temperature, amount of water, washing intensity, etc, and runs the successive cycles of the washing machine 99 operation accordingly.
  • the foam sensor 10 is generally an inductive sensor that detects level of foam based on sensing of pressure of the detergent solution tub 4 by determining differential pressure between the inside of the washing machine 99 i.e. inside the tub 4, and external air i.e. the ambient pressure outside the controlled internal environment of the washing machine 99.
  • the foam sensor 10 determines or detects or senses the level or amount of foam, and any such specific determination or detected reading is referred to as the foam level.
  • the foam sensor 10 continuously or intermittently senses or detects the pressure at different time instances during operation of the washing machine 99 and communicates the detected output i.e. the pressure readings to the controller 30.
  • the pressure readings are indicative of an amount or level of foam that may be present or is preset in the tub 4.
  • the reading of the foam sensor 10 indicative of the level of foam is referred to as a foam level.
  • the foam level corresponds to a time instance when the pressure that resulted in the foam level reading, was sensed.
  • different foam levels are provided by the foam sensor 10 as output or output signal or reading to the controller 30.
  • Each foam level so detected by the foam sensor 10 corresponds to a specific time instance.
  • the controller 30 may request from the foam level from the foam sensor 10 at any time instance.
  • the rotational speed detecting mechanism 20 detects a speed of rotation of the drive motor 5.
  • the rotational speed detecting mechanism 20 determines or detects or senses the speed of rotation of the drive motor 5 or the drive shaft 6. Specific determination or detection is referred to as the rotational speed.
  • the rotational speed detected also had a time parameter i.e. the rotational speed at a specific time.
  • the rotational speed detection mechanism 20 detect the actual rotation speed, which may be different or same as the intended or programmed rotational speed of the drive motor 5.
  • the actual rotational speed of the drive motor 5, hereinafter also referred to as the motor 5, may differ from the intended or the programmed motor speed due to drop in performance of the motor 5 owing to wear and tear, or due to other braking factors which affect the speed of rotation such as excessive foam build up, or overloaded laundry, and so on and so forth.
  • the rotational speed detecting mechanism may be a tachometer or a tachometer generator, also called as tachogenerator.
  • the tachometer or the tachogenerator may be contact type or non-contact type.
  • the non-contact type may be fully electronic tachometer based on optical or electromagnetic sensing mechanisms.
  • Such tachometers or tachometer generators their constructions, principal of operation and way of usage for measuring rotational speeds or frequencies of a rotating body such as the drive motor 5 or the drive shaft 6 are well known in the art of engineering, especially mechanical or electro-mechanical fields, and thus have not been described herein in further details for sake of brevity.
  • the rotational speed detection mechanism 20 continuously or intermittently senses or detects the rotational speeds of the drive motor 5 at different time instances during operation of the washing machine 99 and communicates the detected output i.e. the rotational speed readings to the controller 30.
  • the rotational speed corresponds to a time instance when the speed of rotation of the motor 5 that resulted in the rotational speed reading was sensed.
  • the controller 30 may request from the foam level from the foam sensor 10 at any time instance.
  • the controller 30 controls the foam sensor 10 and the rotational speed detecting mechanism 20 such that a foam level is detected by the foam sensor 10 and a rotational speed of the drive motor 5 is detected by the rotational speed detecting mechanism 20 for a given time instance, i.e. the foam level and the rotational speed are detected simultaneously or at the same time.
  • the controller 30 may exercise this control over the foam sensor 10 and/or the rotational speed detecting mechanism in one or more of the following four ways.
  • the controller may simply receive these readings and match them with each based on that time instance to which both the readings correspond to. As a result of this matching, the foam level and the rotational speed corresponding to the same time instance are matched and recognized or grouped.
  • the controller 30 after receiving the foam level reading corresponding to a time instance may request from a log of the rotation speed detection mechanism 20 the rotational speed reading corresponding to the same time instance. Such logs are then required to be maintained in the rotational speed detection mechanism 20.
  • the controller 30 after receiving the rotational speed reading corresponding to a time instance may request from a log of the foam sensor 10 the foam level reading corresponding to the same time instance.
  • the controller 30 may request the foam sensor 10 and the rotation speed detection mechanism 20 to detect and communicate the corresponding readings to the controller such that the foam level reading and the rotational speed reading correspond to the same time instance.
  • the controller 30 may request readings pertaining to the foam level and to the rotational speed corresponding to the same time instance from respective logs of the foam sensor 10 and the rotation speed detection mechanism 20.
  • the controller 30 determines a threshold value corresponding to the rotational speed of the drive motor 5 detected by the rotational speed detecting mechanism 20.
  • the determination of the threshold value may be performed by the controller 30 be executing runtime computations, for example by using linear regression, or by an array index operation, for example by using a lookup table, or by a combination thereof.
  • the lookup table enlisting different rotational speeds of the drive motor and a corresponding threshold value for each of the different rotational speeds has to be provided to the washing machine 99 stored in the memory module 40.
  • suitable algorithm needs to be provided to the controller 30.
  • the controller 30 compares the foam level detected by the foam sensor 10 to the threshold value so determined. The controller 30 assess or concludes that foam is present in the washing machine 99 if the foam level detected by the foam sensor is equal to or greater than the threshold value.
  • the method 100 for determining foam in the washing machine 99 during spin cycle of operation of the washing machine 99 is explained hereinafter with reference to flow chart of Fig 1 .
  • the method 100 of Fig. 1 is implemented by the arrangement 1 of Fig 2 .
  • the foam sensor 10 detects the level of foam as explained herein earlier.
  • the rotational speed of the drive motor 5 is detected.
  • the foam level is detected 110 and the rotational speed is detected 120 in such a way that the foam level and the rotational speed correspond to the same time instance, for example a given time instance for which the technique of the present invention is being used to determine the foam.
  • the rotational speed is measured by using a tachometer or a tachometer generator, as explained earlier in relation to Fig. 2 .
  • a step 105 the foam sensor 10 is calibrated.
  • the calibration 105 is performed prior to detecting 110 the foam level for the given time instance.
  • the foam sensor 10 is calibrated 105 after the wash solution or wash liquor is drained out through the wash solution discharge system 7 as shown by an arrow directed outside of the washing machine 99.
  • the calibration 105 may be performed while the drum 4 is stationary i.e. when the motor 5 is not rotating the drum 3, for example before commencement of spin in the spin cycle.
  • a threshold value corresponding to the rotational speed of the drive motor 5 so detected is determined in a step 130.
  • the determination of the threshold value is performed by using lookup table and/or by using runtime computation, as explained hereinabove with relation to Fig 2 .
  • a step 140 the foam level detected by the foam sensor 10 for the given time instance is compared to the threshold value so determined for the given time instance.
  • the comparing 140 is performed by the controller 30.
  • the foam is determined as present in the washing machine 99 if the foam level detected by the foam sensor 10 is equal to or greater than the threshold value.
  • the present invention refers to a method for determining foam during spin cycle of operation in a drum-type washing machine 99, wherein a foam level is detected at step 110 by a foam sensor 10, based on sensing of the pressure of a detergent solution tub 4. Simultaneously, a rotational speed of the drive motor 5 is detected at step 120. The foam level and the rotational speed of the drive motor 5 are detected at steps 110,120 for a given time instance. Thereafter, a threshold value corresponding to the rotational speed of the drive motor 5 is determined at step 130. Finally, the foam level detected at step 110 by the foam sensor 10 is compared at step 140 to the threshold value. The foam is determined to be present in the washing machine 99, if the foam level detected by the foam sensor 10 is equal to or greater than the threshold value.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP17162965.2A 2017-03-27 2017-03-27 Verfahren zur bestimmung von schaum in einer waschmaschine Withdrawn EP3382083A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17162965.2A EP3382083A1 (de) 2017-03-27 2017-03-27 Verfahren zur bestimmung von schaum in einer waschmaschine
TR2017/04786A TR201704786A2 (tr) 2017-03-27 2017-03-30 Bi̇r çamaşir maki̇nesi̇nde köpük tespi̇t etmek i̇çi̇n bi̇r yöntem

Applications Claiming Priority (1)

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EP17162965.2A EP3382083A1 (de) 2017-03-27 2017-03-27 Verfahren zur bestimmung von schaum in einer waschmaschine

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EP3382083A1 true EP3382083A1 (de) 2018-10-03

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111850961A (zh) * 2019-04-17 2020-10-30 博西华电器（江苏）有限公司 洗衣机及其泡沫检测方法、装置
CN114098582A (zh) * 2021-11-18 2022-03-01 瀚乐电子机械（南京）有限公司 一种用于检测家用电器内的泡沫量的系统和方法

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WO2009016009A1 (de) 2007-08-01 2009-02-05 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum beseitigen von schaum in einer trommelwaschmaschine und hierzu geeignete trommelwaschmaschine
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WO2015024764A1 (de) * 2013-08-23 2015-02-26 BSH Bosch und Siemens Hausgeräte GmbH Wäschepflegegerät
EP2849007A1 (de) * 2013-09-11 2015-03-18 Electrolux Appliances Aktiebolag Verfahren zur Steuerung einer Waschmaschine während eines Waschzyklus
DE102015204540A1 (de) * 2015-03-13 2016-09-15 BSH Hausgeräte GmbH Verfahren zum Betrieb einer Waschmaschine mit einem elektrochemischen Sensor sowie hierzu geeignete Waschmaschine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB728912A (en) * 1952-05-12 1955-04-27 Vickers Electrical Co Ltd Improvements in and relating to electrical winding and like gear
DD263905A3 (de) * 1984-12-10 1989-01-18 Zse Vyzkumny A Vyvojovy Ustav Kontaktloser elektromagnetischer rotierender tachogenerator
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CN111850961B (zh) * 2019-04-17 2023-12-22 博西华电器（江苏）有限公司 洗衣机及其泡沫检测方法、装置
CN114098582A (zh) * 2021-11-18 2022-03-01 瀚乐电子机械（南京）有限公司 一种用于检测家用电器内的泡沫量的系统和方法

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