WO2019052664A1 - Procédé de fonctionnement d'une machine de traitement de linge, et machine de traitement de linge - Google Patents

Procédé de fonctionnement d'une machine de traitement de linge, et machine de traitement de linge Download PDF

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Publication number
WO2019052664A1
WO2019052664A1 PCT/EP2017/073453 EP2017073453W WO2019052664A1 WO 2019052664 A1 WO2019052664 A1 WO 2019052664A1 EP 2017073453 W EP2017073453 W EP 2017073453W WO 2019052664 A1 WO2019052664 A1 WO 2019052664A1
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WO
WIPO (PCT)
Prior art keywords
pump
water
air
laundry
motor
Prior art date
Application number
PCT/EP2017/073453
Other languages
English (en)
Inventor
Paolo Driussi
Original Assignee
Electrolux Appliances Aktiebolag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electrolux Appliances Aktiebolag filed Critical Electrolux Appliances Aktiebolag
Priority to CN201780094806.3A priority Critical patent/CN111051599B/zh
Priority to PCT/EP2017/073453 priority patent/WO2019052664A1/fr
Priority to US16/647,574 priority patent/US20200277719A1/en
Priority to EP17771406.0A priority patent/EP3684969A1/fr
Publication of WO2019052664A1 publication Critical patent/WO2019052664A1/fr

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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
    • 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 
    • D06F33/47—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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/081—Safety arrangements for preventing water damage
    • D06F39/082—Safety arrangements for preventing water damage detecting faulty draining operations, e.g. filter blockage, faulty pump
    • 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
    • D06F23/00—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 
    • D06F23/02—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 rotating or oscillating about a horizontal axis
    • 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
    • D06F33/42—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of draining
    • 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 
    • D06F33/48—Preventing or reducing imbalance or noise
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • D06F37/36—Driving arrangements  for rotating the receptacle at more than one speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/04—Pumps having electric drive
    • F04B43/043—Micropumps
    • F04B43/046—Micropumps with piezoelectric drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • 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
    • D06F2103/48—Current or voltage of the motor driving the pump
    • 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
    • D06F2105/02—Water supply
    • 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
    • D06F2105/06—Recirculation of washing liquids, e.g. by pumps or diverting valves
    • 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
    • D06F2105/08—Draining of washing liquids
    • 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
    • D06F2105/48—Drum speed
    • 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
    • D06F2105/54—Changing between normal operation mode and special operation modes, e.g. service mode, component cleaning mode or stand-by mode
    • 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 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation arrangements

Definitions

  • the present invention concerns the field of laundry treatment techniques.
  • the invention relates to a method for controlling a pump in a laundry treatment machine capable of performing a more efficient treatment cycle.
  • the invention relates also to a laundry treatment machine implementing such a method.
  • Laundry treating machines generally comprise an external casing provided with a laundry container where the laundry to be treated is placed.
  • a loading/unloading door ensures access to the container for the insertion and removal of the laundry.
  • Laundry treating machines of known type comprise laundry washing machines, both "simple” laundry washing machines (i.e. laundry washing machines which can only wash and rinse laundry) and laundry washing-drying machines (i.e. laundry washing machines which can also dry laundry).
  • laundry washing machine will refer to both a simple laundry washing machine and a laundry washing-drying machine.
  • Laundry treating machines of known type then comprise laundry drying machines, or dryer, i.e. laundry machines which only dry laundry.
  • Laundry washing machines generally comprise an external casing provided with a washing tub which contains said container, preferably a rotatable perforated drum, where the laundry is placed.
  • a loading/unloading door ensures access to the drum.
  • Laundry washing machines then typically comprise a water supply unit and a treating agents dispenser, preferably equipped with a drawer, for the introduction of water and washing/rinsing products (i.e. detergent, softener, rinse conditioner, etc.) into the tub.
  • a treating agents dispenser preferably equipped with a drawer, for the introduction of water and washing/rinsing products (i.e. detergent, softener, rinse conditioner, etc.) into the tub.
  • Known laundry washing machines are also typically provided with water draining devices that may operate during different phases of the washing cycle to drain water from the tub.
  • a water draining device of known type is constituted of a water outlet circuit suitable for withdrawing liquid, for example dirty water, from the bottom of the tub to the outside.
  • the water outlet circuit is typically provided with a controlled draining pump.
  • Another water draining device of known type is constituted of a recirculation circuit adapted to drain liquid from the bottom region of the tub and to re-admit such a liquid into an upper region of the tub.
  • the recirculation circuit is preferably provided with a terminal nozzle opportunely arranged so that the recirculated liquid is sprayed directly into the drum through its holes so that distribution of liquid over the laundry is enhanced.
  • the recirculation circuit is typically provided with a controlled recirculation pump.
  • a further water draining device of known type is constituted of a recirculation circuit, or mixing circuit, which is adapted to drain liquid from a bottom region of the tub and to re-admit such a liquid (recirculated mixing liquid) into a region of the tub which corresponds substantially to the same bottom region of the tub.
  • the mixing circuit is preferably realized for transferring a portion of a liquid from a bottom region of the tub to the same bottom region for mixing and/or dissolution of the products, in particular for liquid and/or powder detergent.
  • the recirculation circuit is typically provided with a controlled recirculation pump.
  • Laundry washing machines of known type are then provided with a water softening device, preferably arranged inside the cabinet.
  • the water softening device is structured for reducing the hardness degree of the fresh water drawn from the external water supply line.
  • the water softening device of known type comprises a water- softening agent container and a regeneration- agent reservoir.
  • a controlled pump is then typically interposed between the water-softening agent container and the regeneration- agent reservoir and is structured for transferring/moving the brine (i.e. the salt water) from the regeneration- agent reservoir to the water- softening agent container.
  • Laundry drying machines generally comprise a container, preferably a rotatable drum, where the laundry is placed.
  • a loading/unloading door ensures access to the drum.
  • Laundry drying machines of known type preferably comprise a sump arranged below the container where condensation water formed in the drying cycle is advantageously collected.
  • Condensation water collected in the sump is preferably drained to an extractable moisture tank located at the upper portion of the laundry drying machine so that it can be easily and periodically emptied by a user.
  • a controlled pump opportunely drains the condensation water from the sump to the tank.
  • laundry treatment machines are typically equipped with one or more pumps, each preferably operated by an electric motor.
  • Pumps of known type comprise an inlet and a rotating element, or impeller, which increases the pressure and the flow of the liquid towards an outlet of the pump itself.
  • laundry washing machines of the known art pose some drawbacks.
  • a drawback of the laundry treating machines of the known art is the fact that the air-water condition is indirectly detected by using a dedicated water/liquid level sensor or using a water/liquid level sensor already installed in the laundry treating machine to control the washing liquid level (for example a pressure sensor installed in laundry washing machines).
  • laundry washing machine comprises a water level sensor arranged at the bottom of the tub and the recirculation and/or the drain pump is switched off as soon as the water level reaches a prefixed minimum threshold level.
  • detection of the water level through said sensor may not be accurate.
  • detection may not be accurate due in particular to oscillations of the water inside the tub, more in particular when the drum is rotating.
  • the measure of the water level inside the tub only indirectly gives indication of presence of air at the pump inlet. Therefore, there is not absolute certainty that the pump is actually working in air- water condition.
  • the pump may therefore be switched off even if it is still working properly, thus reducing efficiency of the draining process and/or causing incompleteness of the draining process.
  • the object of the present invention is therefore to overcome the drawbacks posed by the known technique.
  • Applicant has found that by detecting/evaluating an air-water working condition in a pump of a laundry treating machine on the base of values of voltage and/or current of an electric motor of said pump, it is possible to reach the mentioned objects.
  • the present invention relates, therefore, to a method for operating a laundry treatment machine comprising a container for housing a laundry load to be treated and a pump comprising an inlet for a liquid suction, said pump comprising an electric motor adapted to be powered by a motor voltage and a motor current;
  • an air-water working condition of said pump is detected/evaluated based on values of said motor voltage and/or said motor current of said electric motor.
  • the air-water working condition of the pump is a condition caused by the presence of air at the inlet of the pump.
  • the electric motor is connected or connectable to a mains power supply providing a sinusoidal mains voltage.
  • the motor voltage applied to the electric motor is a partialized version of the sinusoidal mains voltage.
  • the air-water working condition occurs if the root-mean- square voltage of the motor voltage deviates from a threshold value.
  • the air-water working condition occurs if the root-mean-square voltage of the motor voltage is above or below said threshold value.
  • the threshold value is set as a function of an expected target value of the root-mean-square voltage applied to the electric motor.
  • said threshold value is proportional to the target value.
  • the air-water working condition occurs if the activation time of the motor current deviates from a threshold value.
  • the activation time is preferably the period of time starting when the motor current increases or decreases from 0 and ending when said motor current crosses again 0.
  • the air-water working condition occurs if the activation time is above or below the threshold value.
  • said threshold value is set as a function of an expected target value of the activation time.
  • the threshold value is proportional to the expected target value.
  • the air-water working condition occurs if the phase difference between the motor voltage and the motor current deviates from a threshold value.
  • said threshold value is set as a function of an expected value of the phase difference.
  • said threshold value is proportional to the expected value.
  • the laundry treating machine comprises a driving circuit for driving the electric motor, the driving circuit comprising a solid-state switch.
  • said action comprises one of the following actions:
  • said action comprises one of the following actions:
  • the present invention relates to a laundry treatment machine comprising at least one pump comprising an inlet for a liquid suction, said pump comprising an electric motor adapted to be powered by a motor voltage and a motor current, wherein said machine comprises a control unit which is designed for detecting/evaluating said motor voltage and/or said motor current during operation for determining an air- water working condition of said pump.
  • the machine comprises a laundry washing machine or a laundry washing/drying machine or a laundry drying machine.
  • the laundry treatment machine is a laundry washing machine comprising a washing tub external to the container.
  • the pump is a pump of one or more of the following part of said machine:
  • a recirculation circuit for draining liquid from a bottom region of said washing tub and to re-admitting such a liquid into said washing tub;
  • FIG. 1 shows a perspective view of a laundry treating machine implementing the method according to a first embodiment of the invention
  • FIG. 2 shows a schematic view of the laundry treating machine of Figure 1 ;
  • FIG. 3 shows circuit elements of the laundry treating machine according to an embodiment of the present invention
  • FIG. 4 shows qualitative waveforms of instantaneous electric parameters of the laundry treating machine working in a first operative condition
  • FIG. 5 shows the evolution of an electric parameter of the laundry treating machine in a first operative condition during the execution of a washing cycle
  • FIG. 6 shows the evolution of the electric parameter of Figure 5 in a second operative condition during the execution of a washing cycle
  • Figure 7 shows the qualitative waveforms of Figure 6 in a second operative condition
  • FIG. 8 shows qualitative waveforms of instantaneous electric parameters of the laundry treating machine working in a first operative condition according to another preferred embodiment of the invention
  • the method of the present invention has proved to be particularly advantageous when applied to laundry washing machines, as described below. It should in any case be underlined that the present invention is not limited to this type of application. On the contrary, the present invention can be conveniently applied to other type of laundry treating machines, like for example laundry washing and drying machines or laundry drying machines, equipped with one or more pumps.
  • Figures 1 and 2 a preferred embodiment of a laundry washing machine 1 according to the invention is described, in which a method according to a first embodiment of the invention is implemented.
  • the laundry washing machine 1 preferably comprises an external casing or housing 2, a washing tub 3, a container 4, preferably a perforated washing drum 4, where the laundry to be treated can be loaded.
  • the housing 2 is provided with a loading/unloading door 8 which allows access to the drum 4.
  • the drum 4 is advantageously rotated by an electric motor, not illustrated, which preferably transmits the rotating motion to the shaft of the drum 4, advantageously by means of a belt/pulley system.
  • the motor can be directly associated with the shaft of the drum 4.
  • the drum 4 is advantageously provided with holes which allow the liquid flowing therethrough. Said holes are typically and preferably homogeneously distributed on the cylindrical side wall of the drum 4.
  • the bottom region 3a of the tub 3 preferably comprises a seat 15, or sump, suitable for receiving a heating device 10.
  • the heating device 10 when activated, heats the liquid inside the sump 15.
  • the bottom region of the tub may be configured differently.
  • the bottom region of the tub may not comprise a seat for the heating device.
  • the heating device may be advantageously placed in the annular gap between the tub and the drum.
  • a water supply circuit 5 is arranged in the upper part of the laundry washing machine 1 and is suited to supply water into the tub 3 from an external water supply line E.
  • the water supply circuit of a laundry washing machine is well known in the art, and therefore it will not be described in detail.
  • the water supply circuit 5 preferably comprises a controlled supply valve 5a which is properly controlled, opened and closed, during the washing cycle.
  • Treating agents may comprise, for example, detergents, rinse additives, fabric softeners or fabric conditioners, waterproofing agents, fabric enhancers, rinse sanitization additives, chlorine-based additives, etc..
  • the treating agents dispenser 14 comprises a removable drawer provided with various compartments suited to be filled with treating agents.
  • the treating agents dispenser may comprise a pump suitable to convey one or more of said agents from the dispenser to the tub.
  • the water is supplied into the tub 3 from the water supply circuit 5 by making it flow through the treating agents dispenser 14 and then through a supply pipe 18.
  • a water softening device 170 is preferably arranged/interposed between the external water supply line E and the treating agents dispenser 14 so as to be crossed by the fresh water flowing from the external water supply line E.
  • the water softening device 170 as known, is structured for reducing the hardness degree of the fresh water drawn from the external water supply line E and conveyed to the treating agents dispenser 14.
  • the water softening device 170 may be arranged/interposed between the external water supply line E and the washing tub 3, so as to be crossed by the fresh water flowing from the external water supply line E and conveying it directly to the washing tub 3.
  • water softening device 170 Some elements and/or components of the water softening device 170 are well known in the art, and therefore will not be described in detail.
  • the water softening device 170 basically comprises a water-softening agent container 171 and a regeneration-agent reservoir 172.
  • the water-softening agent container 171 is crossed by the fresh water arriving from the external water supply line E.
  • the water-softening agent container 171 is filled with a water softening agent able to reduce the hardness degree of the fresh water flowing through the same water- softening agent container 171.
  • the regeneration- agent reservoir 172 is fluidly connected to the water- softening agent container 171 and is structured for receiving a given quantity of salt or other regeneration agent which is able to regenerate the water softening function of the water softening agent stored inside the water-softening agent container 171.
  • the water softening device 170 then preferably comprises an electrically - powered brine-circulating pump 180 which is interposed between the water- softening agent container 171 and the regeneration- agent reservoir 172 and is structured for transferring/moving, when activated, the brine (i.e. the salt water) from the regeneration- agent reservoir 172 to the water- softening agent container 171.
  • an electrically - powered brine-circulating pump 180 which is interposed between the water- softening agent container 171 and the regeneration- agent reservoir 172 and is structured for transferring/moving, when activated, the brine (i.e. the salt water) from the regeneration- agent reservoir 172 to the water- softening agent container 171.
  • Laundry washing machine 1 preferably comprises a water outlet circuit 25 suitable for withdrawing liquid from the bottom region 3a of the tub 3.
  • the water outlet circuit 25 preferably comprises a main pipe 17, a draining pump 26 and an outlet pipe 28 ending outside the housing 2.
  • the water outlet circuit 25 preferably further comprises a filtering device 12 arranged between the main pipe 17 and the draining pump 26.
  • the filtering device 12 is adapted to retain all the undesirable bodies (for example buttons that have come off the laundry, coins erroneously introduced into the laundry washing machine, etc.).
  • the main pipe 17 connects the bottom region 3a of the tub 3 to the filtering device 12.
  • the filtering device 12 may be provided directly in the tub 3, preferably obtained in a single piece construction with the latter. In this case, the filtering device 12 is fluidly connected to the outlet of the tub 3, in such a way that water and washing liquid drained from the tub 3 enters the filtering device 12.
  • Activation of the drain pump 26 drains the liquid, i.e. dirty water or water mixed with washing and/or rinsing products, from the tub 3 to the outside.
  • Laundry washing machine 1 preferably comprises a first recirculation circuit 30, or mixing circuit 30.
  • the mixing circuit 30 is adapted to drain liquid from the bottom region 3a of the tub 3 and to re-admit such a liquid (recirculated mixing liquid) into a first region of the tub 3, which substantially corresponds to the same bottom region 3a of the tub 3.
  • the mixing circuit 30 is adapted to drain liquid from the bottom of the sump 15 and to re-admit such a liquid (recirculated mixing liquid) again into the sump 15.
  • the mixing circuit 30 preferably comprises a first recirculation pump 31, a first pipe 32 connecting the filtering device 12 to the first recirculation pump 31 and a second recirculation pipe 33, preferably ending inside the sump 15, as mentioned above.
  • the mixing circuit may comprise a dedicated pipe connecting the bottom region of the tub to the recirculation pump; in this case, the mixing circuit is advantageously completely separated from the water outlet circuit, i.e. completely separated from the filtering device 12 and the main pipe 17.
  • the mixing circuit is preferably realized for transferring a portion of a liquid from a bottom region of the tub to the same bottom region for mixing and/or dissolution of the products, in particular of the detergent.
  • Laundry washing machine 1 preferably comprises a second recirculation circuit 20 adapted to drain liquid from the bottom region 3a of the tub 3 and to re-admit such a liquid into a second region 3b, or upper region, of the tub 3.
  • the second recirculation circuit 20 preferably comprises a second recirculation pump 21, a second pipe 22 connecting the filtering device 12 to the second recirculation pump 21 and a second recirculation pipe 23, preferably provided with a terminal nozzle 23 a arranged preferably at the upper region 3 b of the tub 3.
  • the terminal nozzle 23 a is opportunely arranged so that the liquid is sprayed directly into the drum 4 through its holes.
  • the terminal nozzle 23 a therefore, enhances distribution of liquid over the laundry through the perforated drum 4.
  • the liquid from the bottom region 3a of the tub 3 is conveyed towards the upper region 3b of the tub 3 by activation of the second recirculation pump 21.
  • the second recirculation circuit 20 is therefore advantageously activated in order to improve wetting of the laundry inside the drum 4.
  • the second recirculation circuit is properly realized for transferring a portion of a liquid from a bottom region of the tub, preferably from the sump, to an upper region of the tub in order to enhance absorption of the liquid by the laundry.
  • laundry washing machine 1 comprises a device 19 suited to sense (or detect) the liquid level inside the tub 3.
  • the sensor device 19 preferably comprises a pressure sensor which senses the pressure in the tub 3. From the values sensed by the sensor device 19 it is possible to determine the liquid level of the liquid inside the tub 3.
  • laundry washing machine may preferably comprise (in addition to or as a replacement of the pressure sensor) a level sensor (for example mechanical, electro-mechanical, optical, etc.) adapted to sense (or detect) the liquid level inside the tub 3.
  • Laundry washing machine 1 advantageously comprises a control unit 11 connected to the various parts of the laundry washing machine 1 in order to ensure its operation.
  • the control unit 11 is preferably connected to the water inlet circuit 5, the water outlet circuit 25, the recirculation circuits 30, 20, the heating device 10 and the electric motor moving the drum 4 and receives information from the various sensors provided on the laundry washing machine 1, like the pressure sensor 19, a temperature sensor, etc.
  • control unit 11 is preferably connected to the pumps 21, 26, 31, 180 so as to opportunely drive them during the washing cycle.
  • Laundry washing machine 1 advantageously comprises an interface unit 111, connected to control unit 11, accessible to the user and by means of which the user may select and set the washing parameters, like for example a desired washing cycle.
  • the washing parameters like for example a desired washing cycle.
  • other parameters can optionally be inserted by the user, for example the washing temperature, the spinning speed, the load in terms of weight of the laundry to be washed, etc..
  • control unit 11 Based on the parameters acquired by said interface 111, the control unit 11 sets and controls the various parts of the laundry washing machine 1 in order to carry out the desired washing cycle.
  • the laundry washing machine 1 is equipped with a plurality of pumps 21, 26, 31, 180.
  • the pump P preferably comprises an inlet Pi, a rotating element R, or impeller, and an outlet Po.
  • Rotating element R increases the pressure and flow of the liquid from the inlet Pi towards the outlet Po.
  • the pump P also preferably comprises an electric motor 140, preferably an asynchronous electric motor operable by both AC and DC electric power supplies, adapted to be powered/fed for causing impeller rotation and hence activation of the pump P.
  • an electric motor 140 preferably an asynchronous electric motor operable by both AC and DC electric power supplies, adapted to be powered/fed for causing impeller rotation and hence activation of the pump P.
  • the laundry washing machine 1 preferably comprises a driving circuit 155 for driving the electric motor 140, i.e. for powering/feeding the electric motor 140 with an electric motor voltage, and a corresponding electric motor current, capable of causing impeller rotation.
  • Electric motor driving takes place according to a proper control signal VCTRL generated by the control unit 11.
  • the control unit 11 advantageously communicates with the driving circuit 155.
  • Driving circuit 155 is preferably electrically connected to the control unit 11. In further embodiments, driving circuit 155 may be wirelessly connected to the control unit 11.
  • the laundry washing machine 1 is connectable/connected to a mains power supply providing an AC mains voltage VMAINS between a line terminal TL and a neutral terminal TN.
  • the driving circuit 155 preferably comprises a solid-state switch 205, preferably a thyristor device, more preferably a TRIAC device, having a first anode terminal coupled (e.g. directly connected) to the neutral terminal TN of the mains power supply, a second anode terminal coupled (e.g. directly connected) to a first terminal of the electric motor 140, and a gate terminal coupled (e.g. directly connected) to a triggering circuit 207 (e.g. part of the driving circuit 155 as well) adapted to generate triggering pulse signals for activating the solid-state switch 205 according to the control signal VCTRL.
  • the electric motor 140 comprises a second terminal coupled (e.g. directly connected) to the line terminal TL of the mains power supply.
  • An AC-DC conversion circuit (only conceptually illustrated in the figure and denoted, as a whole, by the number reference 210) is provided (preferably arranged at control unit 11 side) that comprises transforming, rectifying and regulation components for receiving the mains voltage VMAINS across the line TL and neutral TN terminals of the mains power supply and providing a (DC) ground voltage GND and a (DC) supply voltage Vcc (e.g. a 3V, 5V or 12V DC voltage with respect to the ground voltage GND).
  • the ground GND and supply Vcc voltages generated by the AC-DC conversion unit 210 are used, amongst other things, for supplying the electric and electronic components included in the triggering circuit 207.
  • the solid-state switch 205 is a TRIAC device. Nevertheless, in further preferred embodiments the solid-state switch may comprise a thyristor, a DIAC, an IGBT, etc.
  • switch will be used to indicate the solid-state switch.
  • the triggering circuit 207 for activating the TRIAC device 205 is preferably controlled by the control unit 11 that preferably generates control signals, such as the control signal VCTRL.
  • the control signal VCTRL is a digital voltage signal capable of selectively taking a high logic value (e.g. corresponding to the supply voltage Vcc) and a low logic value (e.g. corresponding to the ground voltage GND).
  • the TRIAC device 205 when the control signal VCTRL is at the low logic, the TRIAC device 205 is off and the electric motor 140 is not powered.
  • the control signal VCTRL is at the high logic value, the TRIAC device 205 is activated that enable an electric motor voltage VMOT to be fed across (and a corresponding electric motor current IMOT to flow through) the electric motor 140.
  • the electric motor voltage VMOT fed across the electric motor 140 is preferably derived from the AC mains voltage VMAINS, whereas the electric motor current IMOT flowing through the electric motor 140 substantially (i.e. approximately) depends on the electric motor voltage VMOT, on an equivalent impedance exhibited by the electric motor 140 and on electric motor 140 components/parts introducing (capacitive and/or inductive) non-linearity.
  • the control signal VCTRL is such that activation of the TRIAC device 205 is triggered after a predefined delay time Tfire (corresponding to a predefined phase angle of the mains voltage VMAINS and also known as firing angle of the TRIAC) and over a predefined activation time Tlon (corresponding to a predefined conduction angle of the mains voltage VMAINS). Therefore, the motor voltage VMOT waveform is a partialized version of the mains voltage VMAINS (as illustrated in Figure 4).
  • the mains voltage VMAINS is partialized so that the motor 140 is fed with a partialized motor voltage VMOT according to requested design parameters.
  • the motor 140 is fed with a motor voltage VMOT so that the root- mean- square voltage VMOTrms applied thereto is lower than the typical 230V root-mean-square voltage value VMAINSrms of the VMAINS supply voltage (for example VMOTrms is preferably set to 155V).
  • the mains voltage VMAINS is opportunely partialized so that the motor 140 is fed with a partialized motor voltage VMOT when the VMAINSrms, for some reasons, goes higher than 230V. In this situation, advantageously, the motor is protected from overheating.
  • Figure 4 shows qualitative ideal waveforms of the mains voltage VMAINS, of the electric motor voltage VMOT across the electric motor 140, of the motor current IMOT flowing through the electric motor 140 and of the control signal VCTRL when the electric motor 140 is fed with a partialized motor voltage VMOT.
  • the mains voltage VMAINS is an alternating voltage having a full-wave periodic, e.g. sinusoidal, waveform (and, as usual, a VMAINSrms amplitude of 230V or 125V and a frequency of 50Hz or 60Hz).
  • the motor voltage VMOT is an alternating voltage defined by a sequence of positive- slope and negative- slope sinusoidal portions of (or, when possible non- idealities are considered, approximately matching the waveform/trend of) the mains voltage VMAINS, and the motor current IMOT is an alternating current having a sequence of positive and negative sinusoidal (or substantially sinusoidal) waveforms.
  • the sinusoidal portions of (or approximately matching the waveform/trend of) the mains voltage VMAINS that define the motor voltage VMOT derive from activation of the TRIAC device 205 according to the control signal VCTRL.
  • the substantially sinusoidal waveform of the motor current IMOT is due, ideally (i.e. without taking into account delay time intervals and non-idealities introduced by electric motor 140 components/parts, as herein assumed), to inductive nature of the electric motor 140 (so that the motor current IMOT waveform results from the full-wave sinusoidal waveform of the mains voltage VMAINS over the activation time intervals, or otherwise stated, from the positive- slope and negative- slope sinusoidal portions of the mains voltage VMAINS).
  • the motor current IMOT corresponds to the current ITRIAC flowing through the TRIAC.
  • Firing angle Tfire the time from the zero crossing ZC of the VMAINS and the firing point of the TRIAC caused by the control signal VCTRL.
  • Time Tlon activation time of the TRIAC starting at the firing angle and ending when the IMOT, or ITRIAC, crosses 0.
  • the activation time Tlon is also preferably defined as the period of time starting when the motor current IMOT increases, or decreases, from 0 and ending when the motor current IMOT crosses again 0.
  • control signal VCTRL is a pre-fixed sequence of digital signals according to the VMOTrms requested.
  • the firing angle Tfire has a pre-fixed value according to the VMOTrms requested.
  • the activation time Tlon of IMOT is then substantially due to inductive nature of the electric motor 140, as said above, and its expected value Tlont can be therefore evaluated in advance according to the parameter of electric motor 140 actually used.
  • Figure 5 is an exemplary diagram showing the evolution of the root-mean- square voltage VMOTrms applied to motor 140 of the second recirculation pump 31 as a function of the time in laundry machine 1 during the execution of a washing cycle.
  • the second recirculation pump 31, and therefore the motor 140 is activated four times during the washing cycle. It is clear that in different embodiments the second recirculation pump 31, and therefore the motor 140, may be activated a different number of times.
  • the motor 140 is intermittently activated three times at the beginning of the washing cycle, preferably during a phase of the washing cycle where the laundry is being wetted and/or completely soaked with addition of a washing detergent.
  • the motor 140 is then activated a fourth time in a washing phase during which the drum 4 is rotated and the water contained therein is heated to a predetermined temperature based on the washing cycle selected by the user.
  • the drum 4 is preferably rotated, so as to apply also a mechanical cleaning action on the laundry.
  • the voltage VMOTrms applied to the motor 140 for a short period of time has a value corresponding to the VMAINSrms, i.e. 230V, that is then reduced to the target value Vt of 155V thanks to the partialization of the mains voltage VMAINS through the triggering circuit 207 (as explained above).
  • Figure 5 represents the evolution of the root- mean- square voltage VMOTrms applied to motor 140 in a washing cycle where the second recirculation pump 31 is working properly, in particular it is not working in an air-water condition.
  • the applicant has proved that when the second recirculation pump 31 is working in air-water condition, i.e. presence of air at its inlet, the evolution of the root- mean- square voltage VMOTrms applied to the motor 140 deviates from the expected target value Vt.
  • the root- mean- square voltage VMOTrms applied to the motor 140 appears to increase up to a higher level Vf than the expected target value Vt.
  • the root-mean- square voltage VMOTrms applied to the motor 140 is monitored and is compared with the expected target value Vt.
  • the root-mean-square voltage VMOTrms applied to the motor 140 is above the target value Vt it is determined that the pump 31 is working in air-water condition.
  • the root- mean- square voltage VMOTrms applied to the motor 140 is compared with a threshold value TV and if the root- mean- square voltage VMOTrms applied to the motor 140 is above the threshold value TV it is determined that the pump 31 is working in air- water condition.
  • the threshold value TV is preferably set as function of the target value Vt:
  • the threshold value TV is proportional to the value of the target value Vt:
  • the threshold value TV is 108% of the target value Vt.
  • the threshold value TV may be set as:
  • the threshold value TV may be differently set.
  • Figure 4 above described shows qualitative ideal instantaneous waveforms of the mains voltage VMAINS, of the electric motor voltage VMOT across the electric motor 140 of the second recirculation pump 31, of the motor current IMOT flowing through the electric motor 140 and of the control signal VCTRL when the electric motor 140 is fed with a partialized motor voltage VMOT and the second recirculation pump 31 is working properly, in particular it is not working in an air-water condition.
  • Figure 7 shows the same waveforms of Figure 4 when the second recirculation pump 31 is working in an air-water condition.
  • the activation time Tlon of the TRIAC is monitored and is compared with the expected value Tlont.
  • the activation time Tlon repeats regularly with a value equal to, or substantially equal to, the expected value Tlont.
  • the activation time Tlon varies from the expected value Tlont, in particular the activation time Tlon' increases with respect to the expected value Tlont starting from time t-aw. From the same Figure 7 it can be also appreciated that the root-mean-square voltage VMOTrms of the motor voltage VMOT in air-water condition increases from time t-aw, according also to what previously described with reference to Figure 6.
  • the detected activation time Tlon is compared with a threshold value TI and if the detected activation time Tlon is above the threshold value TI it is determined that the pump 31 is working in air- water condition.
  • the threshold value TI is proportional to the value of the expected value Tlont:
  • the threshold value TI is 115% of the expected value Tlont.
  • the threshold value TI is between l,05*TIont and l,5*TIont, more preferably between l,l*TIont and l,3*TIont (i.e. the threshold value TI is preferably between 105% and 150% of the expected value Tlont, more preferably between 110% and 130% of the expected value Tlont).
  • the threshold value TI may be set as:
  • ⁇ is between 0,5 and 3ms, preferably between 0,8 and 2ms, more preferably equal to 1 ms.
  • Said preferred values for ⁇ refers to a main voltage frequency of 50Hz.
  • the threshold value TI may be differently set.
  • the threshold value TI may be calculated as a function of the main voltage frequency.
  • air-water condition of the pump is therefore preferably determined if:
  • air-water condition of the pump may be determined if:
  • threshold values TV and TI may be opportunely set.
  • the threshold value TV may proportional to the value of the target value Vt:
  • the threshold value TV is 85% of the target value Vt.
  • the threshold value TV is between 0,5 *Vt and 0,95 *Vt, more preferably between 0,65 *Vt and 0,90*Vt (i.e. the threshold value TV is preferably between 50% and 95% of the target value Vt, more preferably between 65% and 90% of the target value Vt).
  • the threshold value TV may be set as:
  • AV is between 5 and 50V, more preferably between 10 and 30V, more preferably equal to 15V.
  • the threshold value TI may be preferably set as function of the expected value
  • the threshold value TI is proportional to the value of the expected value Tlont:
  • the threshold value TI is 90% of the expected value Tlont.
  • the threshold value TI is between 0,5*TIont and 0,95*TIont, more preferably between 0,65*TIont and 0,9*TIont (i.e. the threshold value TI is preferably between 50% and 95% of the expected value Tlont, more preferably between 65% and 90% of the expected value Tlont).
  • the threshold value TI may be set as:
  • ⁇ is between 0,5 and 3ms, preferably between 0,8 and 2ms, more preferably equal to 1 ms.
  • Said preferred values for ⁇ refers to a main voltage frequency of 50Hz.
  • the motor voltage VMOT across the electric motor 140 and the motor current IMOT flowing therethrough are detected by means of proper sensors. From said electric parameters, the activation time Tlon may be also be detected/determined, according to techniques well known in the art, and therefore not described in detail.
  • the motor 140 is fed with a motor voltage VMOT which is a partialized version of the mains voltage VMAINS.
  • the motor 140 may be fed with an alternating motor voltage VMOT having a full-wave periodic, e.g. a sinusoidal waveform.
  • the motor 140 may be directly connected to the mains voltage VMAINS.
  • the motor current IMOT due to inductive nature of the electric motor 140, is also an alternating current having a full-wave periodic, e.g. a sinusoidal waveform.
  • Figures 8 exemplary shows qualitative ideal instantaneous waveforms of the electric motor voltage VMOT across the electric motor 140 of the second recirculation pump 31 and of the motor current IMOT flowing through the electric motor 140 when the second recirculation pump 31 is working properly, in particular it is not working in an air-water condition.
  • Figures 9 exemplary shows the same qualitative ideal instantaneous waveforms of Figure 8 when the second recirculation pump 31 is working in an air-water condition.
  • VMOT and IMOT both have an alternating evolution, preferably a full-wave periodic evolution, more preferably a sinusoidal waveform, and exhibit a phase difference Td.
  • phase difference Td is due to inductive nature of the electric motor 140, as said above, and its expected value Tdt can be therefore evaluated in advance according to the parameter of electric motor 140 actually used.
  • phase difference Td' between the electric motor voltage VMOT and the motor current IMOT when the second recirculation pump 31 is working in air-water condition changes with respect the phase difference Td between the electric motor voltage VMOT and the motor current IMOT when the second recirculation pump 31 is working properly, not in air-water condition.
  • the detected phase difference Td' is compared with a threshold value TT and if the detected phase difference Td' is above the threshold value TT it is determined that the pump 31 is working in air- water condition.
  • the threshold value TT is proportional to the value of the expected value Tdt:
  • the threshold value TT is 115% of the expected value Tdt.
  • the threshold value TT is between l,05*Tdt and l,5*Tdt, more preferably between l,l *Tdt and l,3*Tdt (i.e. the threshold value TT is preferably between 105% and 150% of the expected value Tdt, more preferably between 110% and 130% of the expected value Tdt).
  • the threshold value TT may be set as:
  • ⁇ is between 0,5 and 3ms, preferably between 0,8 and 2ms, more preferably equal to 1 ms.
  • Said preferred values for ⁇ refers to a main voltage frequency of 50Hz.
  • the threshold value TT may be differently set.
  • the threshold value TT may be calculated as a function of the main voltage frequency.
  • air-water condition of the pump is determined if the detected phase difference Td' is above the threshold value TT.
  • air-water condition of the pump may be determined if the detected phase difference Td' is below the threshold value TT.
  • the threshold value TT is preferably set as function of the expected value Tdt:
  • the threshold value TT is proportional to the value of the expected value Tdt:
  • the threshold value TT is 85% of the expected value Tdt.
  • the threshold value TT is between 0,5*Tdt and 0,95 *Tdt, more preferably between 0,65*Tdt and 0.9*Tdt (i.e. the threshold value TT is preferably between 50% and 95% of the expected value Tdt, more preferably between 65% and 90% of the expected value Tdt).
  • the threshold value TT may be set as:
  • ⁇ is between 0,5 and 3ms, preferably between 0,8 and 2ms, more preferably equal to 1 ms.
  • Said preferred values for ⁇ refers to a main voltage frequency of 50Hz.
  • An action that can be performed after detection of an air-water condition for a pump preferably comprises deactivation of the pump, i.e. preferably the deactivation of the motor of the pump.
  • deactivation is carried out immediately after detection of the air-water condition.
  • deactivation is carried out after a predetermined period from the detected air-water condition, for example after some seconds.
  • the action that can be performed preferably comprises a variation of the speed of the pump, more preferably a reduction of the speed of the pump (preferably a variation of the speed of the motor of the pump, more preferably a reduction of the speed of the motor of the pump).
  • the action preferably comprises a temporary variation of the speed of the pump, more preferably a temporary reduction of the speed of the pump (preferably comprises a temporary variation of the speed of the motor of the pump, more preferably a temporary reduction of the speed of the motor of the pump).
  • Another action that can be performed after detection of an air-water condition preferably comprises a step of increasing the level of the liquid at the inlet of pump so that to reduce the presence of air.
  • the step of increasing the level of the liquid at the inlet of pump comprises a phase of introducing a quantity of water into the tub from the external water supply line.
  • the step of increasing the level of the liquid at the inlet of pump comprises a phase of:
  • said actions in particular if the pump refers to one of the first or second recirculation circuit above described, avoids formation or foam or allows reduction of foam.
  • the method according to the invention allows the detection of an air-water condition of a pump in laundry treating machine.
  • the method according to the invention allows the prompt detection of an air-water condition of the pump as soon as it happens.
  • detection of the air-water condition is advantageously carried out without necessity of installing a liquid level sensor.
  • the method of the invention allows detecting of an air-water condition of a pump in a laundry treating machine having reduced complexity and/or size compared to laundry treating machines of known type.
  • laundry treating machine performing the method of the invention has higher reliability compared to laundry treating machines.
  • the method according to the invention assures a more correct functioning of the pumps installed in the laundry treating machine which drain liquid from the washing tub and, in turn, reduces the noise caused by the pump working in air- water condition.
  • the present invention allows all the set objects to be achieved.
  • it makes it possible to provide a method for draining liquid in a pump of a laundry treating machine that makes it possible to drive the pump with a higher efficiency compared to known system.
  • laundry washing machine illustrated in the enclosed figures and with reference to which some embodiments of the method according to the invention have been described, is of the front-loading type; however it is clear that the method according to the invention can be applied as well to a top- loading laundry washing machine, substantially without any modification.
  • the method according to the invention can be applied to any type of pump in laundry treating machine.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

L'invention concerne un procédé de fonctionnement d'une machine de traitement de linge (1) comprenant un récipient (4) destiné à recevoir une charge de linge à traiter et une pompe (P, 21, 26, 31, 180). La pompe (P, 21, 26 31. 180) comprend un moteur électrique (140) adapté pour être alimenté par une tension de moteur (VMOT) et un courant de moteur (IMOT). Une condition de travail air-eau de la pompe (P, 21, 26 31, 180) est détectée/évaluée sur la base de valeurs de la tension de moteur (VMOT) et/ou du courant de moteur (IMOT) du moteur électrique (140).
PCT/EP2017/073453 2017-09-18 2017-09-18 Procédé de fonctionnement d'une machine de traitement de linge, et machine de traitement de linge WO2019052664A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201780094806.3A CN111051599B (zh) 2017-09-18 2017-09-18 用于操作衣物处理机的方法以及衣物处理机
PCT/EP2017/073453 WO2019052664A1 (fr) 2017-09-18 2017-09-18 Procédé de fonctionnement d'une machine de traitement de linge, et machine de traitement de linge
US16/647,574 US20200277719A1 (en) 2017-09-18 2017-09-18 Method for operating a laundry treatment machine and laundry treatment machine
EP17771406.0A EP3684969A1 (fr) 2017-09-18 2017-09-18 Procédé de fonctionnement d'une machine de traitement de linge, et machine de traitement de linge

Applications Claiming Priority (1)

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PCT/EP2017/073453 WO2019052664A1 (fr) 2017-09-18 2017-09-18 Procédé de fonctionnement d'une machine de traitement de linge, et machine de traitement de linge

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US11866915B2 (en) 2020-12-07 2024-01-09 Rheem Manufacturing Company Liquid concentrate dosing systems
US20220178362A1 (en) * 2020-12-07 2022-06-09 Rheem Manufacturing Company Peristaltic pump systems
EP4123080A1 (fr) * 2021-07-19 2023-01-25 Electrolux Appliances Aktiebolag Machine à laver le linge

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19618498A1 (de) * 1996-05-08 1997-11-13 Amp Gmbh Anordnung zur Überwachung einer Pumpe
US20070163626A1 (en) * 2004-01-23 2007-07-19 BSH Bosch und Siemens Hausgeräte GmbH Liquid-conducting electrical household appliance
US20140311192A1 (en) * 2010-04-13 2014-10-23 Whirlpool Corporation Laundry treating appliance with automatic pump shutoff
EP2993262A1 (fr) * 2014-09-02 2016-03-09 Electrolux Appliances Aktiebolag Procédé de lavage du linge dans une machine à laver le linge et machine à laver le linge

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2292384B1 (fr) * 2009-09-04 2016-04-06 Black & Decker Inc. Sous-système redondant protecteur pour outils électriques
US8362735B2 (en) * 2011-03-07 2013-01-29 Protective Energy Economizer Technology Single phase motor energy economizer for regulating the use of electricity
US10244919B2 (en) * 2012-11-08 2019-04-02 Electrolux Home Products Corporation N.V. Detecting operational state of a dishwasher
DE202014102422U1 (de) * 2013-05-31 2014-08-08 Hitachi Koki Co., Ltd. Elektroleistungswerkzeug

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19618498A1 (de) * 1996-05-08 1997-11-13 Amp Gmbh Anordnung zur Überwachung einer Pumpe
US20070163626A1 (en) * 2004-01-23 2007-07-19 BSH Bosch und Siemens Hausgeräte GmbH Liquid-conducting electrical household appliance
US20140311192A1 (en) * 2010-04-13 2014-10-23 Whirlpool Corporation Laundry treating appliance with automatic pump shutoff
EP2993262A1 (fr) * 2014-09-02 2016-03-09 Electrolux Appliances Aktiebolag Procédé de lavage du linge dans une machine à laver le linge et machine à laver le linge

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US20200277719A1 (en) 2020-09-03
EP3684969A1 (fr) 2020-07-29
CN111051599A (zh) 2020-04-21

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