WO2018184734A1 - Appareil de traitement de linge - Google Patents

Appareil de traitement de linge Download PDF

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Publication number
WO2018184734A1
WO2018184734A1 PCT/EP2018/025088 EP2018025088W WO2018184734A1 WO 2018184734 A1 WO2018184734 A1 WO 2018184734A1 EP 2018025088 W EP2018025088 W EP 2018025088W WO 2018184734 A1 WO2018184734 A1 WO 2018184734A1
Authority
WO
WIPO (PCT)
Prior art keywords
ball
drum
balancer
treating apparatus
laundry treating
Prior art date
Application number
PCT/EP2018/025088
Other languages
English (en)
Inventor
Antonio Chiriatti
Original Assignee
Antonio Chiriatti
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
Priority claimed from IT102017000037265A external-priority patent/IT201700037265A1/it
Application filed by Antonio Chiriatti filed Critical Antonio Chiriatti
Publication of WO2018184734A1 publication Critical patent/WO2018184734A1/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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis
    • D06F37/225—Damping vibrations by displacing, supplying or ejecting a material, e.g. liquid, into or from counterbalancing pockets
    • 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
    • D06F2103/26—Imbalance; Noise level
    • 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
    • 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
    • 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

Definitions

  • the invention relates to a laundry treating apparatus.
  • the invention relates to a ball balancer for a washer or dryer appliance to compensate for the unbalance created by a not uniform distribution of the clothes in the drum.
  • a washing machine in general includes a drum to be loaded with clothes and a motor to rotate the drum and perform a series of phases in a washing cycle such as washing, rinsing and spinning phases .
  • appliance control tries to better redistribute the laundry in the drum and, if after several attempts, the unbalance level is still too high, it performs the spinning at reduced rpm.
  • the unbalance has several negative effects on the customer satisfaction because of the generated noise and vibrations, the longer washing/drying cycle duration due to the re-balancing attempts and the poor drying performance when, in case of excessive unbalance level the spinning rpm speed is reduced.
  • the generated mechanical vibrations cause a
  • the known balancer systems make use of a balancer ring with a hollow space where are positioned some masses, typically spherical shaped that are free to move in the balancer ring. Often the balancer ring is filled with a fluid to limit the speed of the movement of the balancing masses. Even if this known balancer systems help to reduce the unbalance level they suffer of several drawbacks:
  • KR 20140095929 and KR 20080037428 disclose the use of magnets positioned in the balancer that allow to constraint the balls movement in the balancer ring below a certain rpm speed.
  • US 2015/0368845 discloses a balancer including a housing fixed to the drum, a movably balancing unit accommodated in the housing and a power line connected to a first power supply unit, fixed to the drum shaft to supply the balancing unit with electric power and a second supply unit rotatably fixed to the first supply unit connected to a power source.
  • Object of the invention is to provide a new balancer to be fixed to the drum to compensate for the unbalance created by the laundry.
  • a balancer ring housing having a hollow channel where are disposed balancing masses preferably being shaped like balls. Fixed to one side of the balancer housing there are, equally spaced electric actuators, interacting with the balancing masses.
  • the electric actuators can control constraining or blocking the transit of the
  • balancing masses at their position They have two conditions or states: free, which allows the transit of the ball and blocked or constrained, which blocks or act with a resistant force to the ball passage.
  • the balls during the drum rotation are moving in the hollow channel under the action of gravitational and or inertial forces.
  • By actively electrical controlling the actuators state it is possible to change the distribution of the balancing masses in the hollow channel sections defined by the actuators positions to balance the drum.
  • the electric power to drive the electric actuators and their driver electronic circuits, which are rigidly fixed to the drum, is provided by an electromagnetic coupling (induction) or by sliding contacts.
  • electromagnet actuators that can mechanically act on the ball passage at their position and either enable or block the movement of the balls
  • electromagnets that can constraint, block or enable the ferromagnetic ball passage by the attractive force of their magnetic field acting on the ball.
  • a first embodiment foresees six mechanical actuators equally spaced.
  • a second embodiment considers twelve actuators that ensure a more accurate balancing.
  • a third embodiment considers the balancing process done autonomously by the driving unit positioned on the drum.
  • the mechanical actuators are disposed on the balancer internal side in radial direction .
  • the driving unit defining its positioning in the central part of the external side of the drum and dividing its actuators control function from the selection function thanks to the introduction of switch elements.
  • the electromagnets when supplied with current, generate a magnetic field that has the described effect of blocking the balls passage in the channel at their positions.
  • the method to change the ball positions in the balancer is the same for both type of actuators here in the following described for the ball passage control implemented with electromagnets.
  • a preferred embodiment refers to horizontal axis washers where the rotational axis of the drum is a horizontal axis, and the annular channel is positioned circumferentially in a vertical plane, the balls being subject to the gravitational forces. It is also possible to consider embodiments for vertical axis washers where the rotational axis of the drum is a vertical axis, and the annular channel is positioned circumferentially in a horizontal plane, the balls being subject to the inertial forces effect of the drum rotation speed changes.
  • each drum rotation period the balls under the action of the gravity force will tend to oscillate moving forth and back in the balancer.
  • the excursion amplitude depends mainly on the drum rotation frequency.
  • the balancer channel has one ferromagnetic ball and electromagnets positioned on one side, equally spaced.
  • the electromagnets divide the channel into equal segments with ends corresponding to the electromagnets.
  • the formed channel segments length is short enough, i.e. the distance between two electromagnets is lower than the lowest forth-back excursion of the ball under the action of the gravitational force and all electromagnets are powered, after the first balancer turn the ball will be attached to one of the electromagnet .
  • the deactivation timing selects to which of the two possible adjacent electromagnets the ball will be moved. By iteratively repeating this action, deactivating the electromagnets with the ball each drum rotation period, it is possible to move the ball in the balancer to any desired position.
  • the force acting on the balls can be the inertial force generated by the drum rotation speed acceleration/deceleration.
  • a sensing coil to detect the balancing masses position. The sensing coil positioned on the tub can detect the balls
  • the information about the balls distribution in the balancer allows a more efficient balancing strategy and to verify the balls movements during the unbalance compensation process.
  • the openings create a groove extending radially in direction to the centre forming a seat for one ball.
  • a magnetic element that keeps the ball in the seat during the low speed drum rotation in washing.
  • the ball sitting in the opening, blocks the balancer channel passage at its position.
  • the opening with the associated magnet allows to block the balls passage limiting the balls movement in washing at low rpm e.g. ⁇ 50rpm.
  • the acceleration forces exceed the magnetic elements attraction forces e.g. 120 rpm and the balls are satellized free to roll on the balancer wall .
  • the balls are symmetrically redistributed in the channel moving the balls as described previously.
  • the drum speed is reduced to few rpm and sequentially the electromagnets deactivated when they are at the top and their radial position is aligned with the gravitational force. By deactivating the electromagnets at this position the balls, free, will fall in the openings and be kept there by the magnetic elements.
  • a drive unit that supplies the electromagnets with the proper timing. Power and timing are provided by the appliance control unit to the drive unit to allow its function.
  • the detecting function is supported by two additional sensing coils positioned close to the electromagnet.
  • Fig 1 is sectional view of a first possible embodiment of a horizontal axis washer with a balancing system object of this invention .
  • Fig. 2 is a sectional view of the balancer ring.
  • Fig. 3 and Fig. 4 are a sectional view according the lines I-I and II-II of Fig. 2.
  • Fig. 5 is a sectional view according the surface I-I of Fig. 1.
  • Fig. 6 is a sectional view of an embodiment of an actuator element .
  • Fig. 7 and Fig. 8 are sectional views according the lines I I and II-II of Fig. 6.
  • Fig. 9 shows the current waveform in the actuator following the application of a voltage pulse.
  • Fig. 10 shows the functional blocks of a control unit, a driving unit and their wireless connection.
  • Fig. 11 shows a first embodiment with 6 actuators.
  • Fig. 12 shows in detail the component of the gravity force acting on the ball.
  • Fig. 13 shows a balls positioning for a fast transfer of few balls .
  • Fig. 14 and Fig. 15 show how are defined the balls positions to offset unbalance in case of a 6 ball actuator embodiment.
  • Fig. 16 and Fig. 17 show with the same the balancing case of Fig. 14 and Fig. 15 with a 12 actuators embodiment.
  • Fig. 18 shows a sectional view of an embodiment for the
  • Fig. 19 shows another embodiment for the driving unit with the association of switching elements.
  • Fig. 20 shows a possible embodiment for a switching element.
  • Fig. 21 is a front view of a sensing coil on a support ring.
  • Fig. 22A and 22B are a front and sectional view of the sensing coil .
  • Fig. 23 is a front view of a balancer ring without cover.
  • Fig. 24 is a sectional view taken along the line I-I of Fig. 23.
  • Fig. 25 is a front view of a magnetic element.
  • Fig. 26 is a front view of the electromagnet
  • Fig. 27 is a sectional view taken along the line I-I of Fig. 24
  • Fig. 28 and Fig. 29 are sectional views according the surface I-I of Fig. 1 for two balancer positions.
  • Fig. 30 shows the output of the sensing coil detection circuit.
  • Fig. 31 to Fig. 34 show the balancing process with 4 balancer ring positions during a rotation period.
  • Fig. 35 shows a block diagram including the appliance control unit and the drive unit.
  • Fig. 36 shows a sectional view of the electromagnet with two additional sensing coils.
  • Fig. 37 shows the electromagnet driving circuit to inject an additional alternate current for sensing the ball presence.
  • Fig. 38 shows a possible variation of sensing signals or induced voltage in case of two balls passage.
  • same parts are indicated with the same reference number .
  • Fig. 1 it is shown a sectional view of the key structural parts of a horizontal axis washer 10.
  • the wash unit consisting of the tub 30 on which is rotatably mounted a drum 50.
  • the wash unit is suspended to the cabinet 20 through springs 40 and dumper 80.
  • balancer rings 500 At the external sides of the drum 50 are fixed two balancer rings 500. On the front side, corresponding to the drum
  • the receiver element 63 is electromagnetically coupled to a power supply transmitter element 62 fixed to the Tub 50.
  • Fig. 2 shows a sectional view in radial direction of the balancer 500. It includes a balancer housing with walls 331, 380, 310 and 360 forming a hollow channel where are disposed balancing balls 400. Along the balancer housing side 360 are integrated equally spaced electromagnet actuators elements 200.
  • the magnet actuators 200 are fixed to the lateral side 360 of the balancer housing. Attached to this side 360 of the balancer ring 500 there is the annular shaped receiving element 63.
  • Fig. 4 shows another sectional view of the balancer 500 and of the receiver element 63, taken along the line II-II of Fig. 2.
  • the receiver element 63 is fixed parallel in radial direction opposite the transmitter element 62. They are parallel mounted centred respect to the drum centre in order to maximize the electromagnetic coupling, as shown in Fig. 5, a sectional view taken along the surface I-I indicated in Fig. 1.
  • the transmitter element 62 has a coil 620 which is coupled to the coil 630 of the receiving element 63. They are integrated into the enclosing material 622, 632 and have respectively the magnetic sheets 621 and 631 that provide the one side magnetic shield and improve the magnetic coupling.
  • Fig. 6 shows a sectional view of a possible electromagnet actuator 200 embodiment.
  • It includes a cylindrical shaped ferromagnetic material 230 free to move in axial direction within a cylindrical shaped channel 231.
  • the extension 240 can interfere with the balls 400 and block the passage.
  • Fig. 7 and Fig. 8 show respectively a sectional view taken along the line I-I and II-II indicated in Fig. 6. They
  • the two positions corresponding to the magnetic cylinder 230 sitting on the sides 211 and 213 maximize the magnetic flow and are two stable positions for the cylinder 230.
  • the current flowing in the winding 262 will increase from 0 to a maximum after a time 263.
  • the generated magnetic field will move the cylinder 230
  • the time response from the voltage pulse application to the cylinder 230 position change i.e. the actuator response time can be few milliseconds. It is very fast compared with the maximum drum rotation period required to ensure clothes
  • the actuator 200 can change status within few degrees of drum rotation.
  • a drive unit 61 generates the voltage pulses 615 with the proper timing to control the actuators. It operates interacting and under the supervision of the control unit 60, as shown in Fig. 10.
  • the control unit 60 manages the complete washer (10) operation, controlling the drum motor rotation speed as well as the other appliance actuators e.g. the drain pump (not shown in Fig. 10) .
  • the control unit 60 it is generated the oscillating voltage by switching elements 602 that supply the coil 620 of the transmitting element 62 coupled to the coil 630 of receiving element 63.
  • the voltage induced in the coil 630 is rectified and
  • radiofrequency link 601 allows bidirectional data transfer between the control unit 60 and the drive unit 61.
  • a first embodiment there are 6 equally space actuators 200, dividing the balancer hollow channel into 6 sections defined by their position as shown in Fig 11.
  • the 6 actuators 220 are spaced 60 degrees apart, on 6 arc sectors 520-525, and positioned with the extending edge 241 centred with respect to the hollow channel where are disposed balancing balls 400.
  • Two sections positioned 180 degrees apart corresponding to the arc sectors 520-525 522-523 are used to collect the ball in washing, when no ball movement is desired.
  • the process to collect the balls into the two sections is quite fast and simple: when the drum is not running all the balls 400 are sitting on the bottom side of the balancer 500 hollow channel due to the gravity. All the actuators 200 are in open status letting the balls to pass through; only one actuator on the upper side, e.g. 520, is blocked status.
  • the second actuator 220 at position 525 is set to blocked status and the first group of balls is collected.
  • the drum rotation speed is increased to satellize the clothes, typically around 80-90 rpm.
  • the balls 400 are satellized, pushed by the centrifugal forces against the balancer wall 331.
  • the ball 400 as shown in detail in Fig. 12, during the drum 30 rotations is subject to the gravitational force 401.
  • This component 402 has a sinusoidal changing amplitude
  • the balancer angular position is defined by the angle 511, formed by the segment joining the centre 510 with the position 522 and the vertical line passing for the centre 510. Having assumed a counterclockwise rotation, the actuator 200 at position 523, normally in blocked status, will allow the ball 400 transit when the angle 510 is between 30 and 210 degrees.
  • the balls 400 in the section 523-522 are accelerated and can move to the adjacent section 523-524 reaching the maximum speed when they are at the top. They would continue to move in the same direction even when the force change direction, while being decelerated in the
  • actuator 400 allows the balls transit, can be centred around the position with the balls at 90 degrees; to ensure the maximum of the gravitational force and have the shorter
  • the opening angle amplitude can be calculated from the gravitation force and the desired number of balls to transfer.
  • control unit 60 measures the unbalance level and position, this measurement can be done indirectly e.g. through the motor torque combined with
  • a vector 910 can represent the unbalance.
  • the vector 911 opposite to 910 defines the required compensation mass and position and defines the new positions respectively 411 and 421 where to move the balls from the sections 410 and 420. If the new positions 411, 421 are including two sections, the balls can be split between the two, as shown in Fig. 15.
  • the balls transfer can be done following the process previously described .
  • the balls will tend to move within the section causing a variation, even if of limited amount, of the desired compensation mass.
  • a higher number of actuators can be used allowing to reduce or eliminate the variation of the compensation mass and ensure higher margins for a full ball section transfer.
  • FIG. 17 A second embodiment is shown in Fig. 17, where 12 actuators 200 define 12 sections.
  • each compensating component 411, 421 can be approximated by combining
  • the balancing process is driven by the control unit 60 that measures the unbalance, calculate the desired new balls position and communicate to the slave drive unit 61 the needed actuators activation and timing.
  • the drive unit can measure the unbalance position and size performing autonomously the balls (400) redistribution.
  • the drive unit circuits could be positioned integrated into the lateral side of the balance housing 360 together with the actuators 200 and connecting electric cables could be used to connect the receiver element 63 to the drive unit 61 and the balancers 500.
  • the drive unit could integrate an accelerometer that in the drum centre position could easily and precisely measure the unbalance. In fact by positioning the accelerometer in the drum center corresponding to the drum rotation axis it is possible to measure the rotation axis movements that depend on the unbalance position and mass.
  • Fig. 18 shows the drive unit 61 positioned at the drum external central area 55 and the routing of cables 619 to connect it to the receiving element 63 and the balancers 500.
  • the transmitter and receive elements 63 and 62 could be made of plastic by injection moulding having co-injected respectively the coils and ferromagnetic sheet 621, 631.
  • the actuators 200 are fixed to the balancer internal wall in radial direction 340. In this case the movement of cylindrical shaped ferromagnetic element 230 and its extension 241 is in radial direction.
  • switch elements 701, 702 associated to each actuator 200.
  • the drive unit 61 generates bus voltages 616 and 617 that are distributed to the actuators 200 and the associated switch elements, as shown in Fig. 19.
  • the switch element 701, 702, once activated, will power the associated actuator 200 with the bus voltage lines 616, 617.
  • the switch elements 701, 702 can be activated by proper signal receivers 720, included in the receive element 63 and coupled to associated signal transmitters, in the transmit element 62, managed by the control unit 60.
  • the signal transmitter could be a coil coupled to a possible small signal receiver coil 720 as shown in Fig. 20.
  • FIG. 21 A front side view of the ring 62 with the sensing coil 620 is shown in Fig. 21.
  • Fig. 22A and 22B show a front and sectional view of the sensing coil 1620.
  • Fig. 23 shows a front view of the balancer ring 500 without cover.
  • the balancer ring 500 channel are disposed balancing ferromagnetic balls 400.
  • Fig. 24 shows the sectional view of the balancer 500 taken along the line I I of Fig. 23 at a position corresponding to an electromagnet 1200.
  • the walls 1331, 1360, 1320 and 1380 form the hollow channel where are disposed the balancing balls 400.
  • the electromagnets 1200 are integrated into the housing side
  • the magnetic element 1210 positioned close the opening 1310 with its magnetic attraction force, if a ball 400 is in the opening 1310, keeps the ball 400 in the opening 1310.
  • FIG. 25 A front side view of the magnetic element is shown in Fig. 25.
  • the electromagnet 1200 has windings 1230 made around the ferromagnetic support 1250 as shown in the front side view of Fig. 26.
  • the ferromagnetic support 1250 has an extension 1251 with a circular arc shape that improves the magnetic coupling with the ball 400, when the ball 400 is satellized.
  • the ball opening 1310 has a circular shape also in axial direction as shown in Fig.27, a sectional view taken along the line I-I of Fig. 24.
  • Fig. 28 and Fig. 29 show a sectional view taken along the section I-I indicated in Fig. 1. They show respectively two positions of the balancer ring 500 during the rotation, corresponding to the sections with and without the balancer ring 500
  • Fig. 23 This represents the normal condition of the balancer ring 500 when it is not moving or it is rotating at low rpm ⁇ (0-50rpm) .
  • balls 400 sitting in the openings 1310 that block the passage at their positions. All segments passages are blocked in the balancer channel.
  • the unbalance position in the balancer could be measured with respect to a reference point 1350 defined on the drum
  • a synchronization pulse 650 generated when the reference point 1350 is aligned with a tub reference point.
  • the unbalance position 90 could be measured combining the synchronisation pulse 650 with the processed signals from accelerometers positioned in the drum 50 or tub 30.
  • the electromagnets 1200 positions corresponding to the unbalance position By knowing the unbalance 90 position in the drum 50 it is defined the electromagnets 1200 positions corresponding to the unbalance position. For example in Fig. 31 it is identified that the unbalance 90 is positioned between the electromagnets 1200 corresponding to the positions 1 and 2. In order to compensate for the unbalance 90 some of the balls present in the balancer channel segments 3 2, 2 1 and 1 6 should move away from the unbalance side.
  • the electromagnet 1200 corresponding to the position 1 is deactivated in the first 180 degrees rotation corresponding to the drum positions from 51 to 52.
  • the ball 1201 normally blocked by the magnetic field at position 1 can roll on the balancer channel under the action of the gravitational force together with the adjacent ball passing through the balancer channel position 1.
  • the balancing process can be accelerated by deactivating at the same time more than one electromagnet (switching off the current) e.g. deactivating at the same time the electromagnets at position 1 and 6 in the first half rotation and 2 and 3 during the second half turn rotation.
  • the balancing process can be done iterating the steps:
  • the unbalance correction process here described does not need to know the balls 400 distribution in the balancer channel segments defined by the electromagnets 1200 positions.
  • the measured unbalance mass and position 90 is the result of the contribution of the unbalance created in the drum by the laundry plus the contribution of the balls 400 distribution in the balancer 500.
  • the sensing coil 1620 sitting in front of the balancer channel can detect the balls presence in the balancer during its rotation and permits to know the balls distribution in the channel.
  • the balls 400 by passing during the drum rotation close to the sensing coil 1620 cause an inductance change that can be detected by an inductive sensing circuit.
  • the coil 1620 diameter is greater or equal than the balls 400 diameter and it is enough larger at least by a factor > 1.5 than the coil 1620 distance from the balls 400.
  • a possible curve 65 showing the inductance sensing output as function of time is shown in Fig. 30. By identifying the time of synchronization pulse 650 in the curve 65 it is possible to know the balls 400 distribution in the balancer 500 with respect to the drum reference point 1350 in the curve 65 it is also indicated the time position 690 corresponding to the measured unbalance position 90.
  • the electromagnets 1200 are sequentially deactivated while they are at the top position (vertically positioned) . Their attached balls, once there is no more magnetic attraction force, attracted by the gravitational force will sit on the openings 1310 and stay there maintained at their position by the magnet elements 1210.
  • Fig. 36 shows a possible control architecture implementation where are shown the appliance control unit 60 and the drive unit 61.
  • the appliance control unit 60 is part of the
  • the stationary machine 10 supervises the complete appliance operation driving the appliance actuators e.g. motor, valves and acquiring the appliance sensors values e.g temperature sensing, water level (not shown in the block diagram) .
  • the appliance control unit 60 drives and controls the drive unit 61 which is part of the drum 50.
  • the appliance control unit 60 provides the electric power 602 to the drive unit 61, it could be the wireless power link or through sliding contacts.
  • the received power is conditioned by a conditioning and switching function 1611 and brought through wires 1615 to the electromagnets 1200.
  • the switching function 1611 in the drive unit 61 receives the timings and activation commands from the appliance control unit by a bidirectional wireless data link 601.
  • FIG. 36 shows a sectional view of the electromagnet 1200.
  • the electromagnet winding 230 is supplied in addition to the DC current 1631 that creates the magnetic attraction force with an alternate current 1634 to provide the sensing function.
  • the current 1634 has a rms value lower that the DC current generated by the DC voltage source 1631.
  • the presence of the ball 400 modifies the magnetic flux split between the ferromagnetic support edge 1250 and the opposite sides corresponding to the coils 1231 and 1230.
  • the ball 400 when the ball 400 is sitting in the opening 1310 it will increase the flux in coil 1232.
  • the ball when the ball is satellitized it will increase the flux in the coil 1231.
  • the voltages detected by the coils 1231 and 1232 are amplified by the block 1636 and their output voltages levels 1637 transferred from the driver circuit 163 to the drive unit 61 through a bidirectional serial interface 1616.
  • the ball 400 presence By monitoring the electromagnet coil 1230 parameters it can be detected the ball 400 presence.
  • the additional information of the induced voltage in the coils 1231 and 1232 can give more accurate ball position information, if the ball is satellized or sitting on the opening 1310.
  • this ball 400 presence detection function gives information if the ball is leaving, approaching or is fixed at the electromagnet 1200. It allows to count the number of balls passing at the electromagnet 1200 position. In fact when there is more than one ball passage at the electromagnet position we can expect a change in the electromagnet 1200 parameters or in the coil 1231 voltage with a signal shape having a minimum 1638 as shown in Fig. 38.
  • the balancing process is driven by the control unit 60 that measures the unbalance, calculates the desired new balls positions and communicates to the drive unit 61 the electromagnets 1200 activation timing. It is also possible to have an intelligent drive unit that performs autonomously the balancing process.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Abstract

L'invention concerne un appareil de traitement du linge (10) comprenant une cuve (30), un tambour (50) monté rotatif à l'intérieur de la cuve (30), au moins un balancier à billes (500) monté centré sur le tambour (50) ayant un canal annulaire délimité en son sein, au moins une bille (400) disposée mobile dans ledit canal, ladite bille étant libre de se déplacer dans ledit canal sous l'action de forces gravitationnelles et inertielles, lequel appareil est caractérisé en ce qu'au moins un élément actionneur (200, 1200) est fixé à un côté dudit balancier (500), ledit élément actionneur (200, 1200) a au moins deux états commandés pour permettre, bloquer ou contraindre le transit de ladite bille (400) à sa position, ledit élément actionneur (200), par activation dynamique respectivement du blocage ou de la contrainte du transit de la bille (400) dans ledit canal d'équilibreur (500) à sa position, peut agir sur la position de la bille (400) dans l'équilibreur (500), de telle sorte que le déséquilibre (90) dans le tambour (50) est compensé d'au moins ladite masse de bille (400).
PCT/EP2018/025088 2017-04-05 2018-04-04 Appareil de traitement de linge WO2018184734A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT102017000037265A IT201700037265A1 (it) 2017-04-05 2017-04-05 Bilanciatore per controllo attivo di sbilanciamento in un elettrodomestico
IT102017000037265 2017-04-05
IT102018000002387 2018-02-05
IT201800002387 2018-02-05

Publications (1)

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WO2018184734A1 true WO2018184734A1 (fr) 2018-10-11

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PCT/EP2018/025088 WO2018184734A1 (fr) 2017-04-05 2018-04-04 Appareil de traitement de linge

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111979703A (zh) * 2019-05-23 2020-11-24 青岛海尔洗衣机有限公司 衣物处理设备
CN112064297A (zh) * 2019-05-23 2020-12-11 青岛海尔洗衣机有限公司 衣物处理设备
WO2020253988A1 (fr) * 2019-06-21 2020-12-24 Pronova Ug Appareil de traitement du linge
IT201900015105A1 (it) * 2019-08-27 2021-02-27 Antonio Francesco Chiriatti Lavatrice con bilanciatore e metodo di controllo
IT201900016334A1 (it) * 2019-09-16 2021-03-16 Antonio Francesco Chiriatti Lavatrice con bilanciatore attivo e suo metodo di controllo
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IT202000006271A1 (it) * 2020-03-25 2021-09-25 Antonio Francesco Chiriatti Lavatrice con unita´di bilanciamento e suo metodo di controllo
IT202100024053A1 (it) * 2021-09-20 2023-03-20 Electrolux Appliances AB Attuatore per bilanciamento attivo di lavatrice

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CN112064297A (zh) * 2019-05-23 2020-12-11 青岛海尔洗衣机有限公司 衣物处理设备
CN111979703A (zh) * 2019-05-23 2020-11-24 青岛海尔洗衣机有限公司 衣物处理设备
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CN114144551A (zh) * 2019-06-21 2022-03-04 伊莱克斯家用电器股份公司 衣物处理设备
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IT201900015105A1 (it) * 2019-08-27 2021-02-27 Antonio Francesco Chiriatti Lavatrice con bilanciatore e metodo di controllo
IT201900016334A1 (it) * 2019-09-16 2021-03-16 Antonio Francesco Chiriatti Lavatrice con bilanciatore attivo e suo metodo di controllo
IT201900022899A1 (it) * 2019-12-04 2021-06-04 Antonio Francesco Chiriatti Elettrodomestico con anello bilanciatore per compensare sbilanciamento e suo metodo di controllo.
IT202000006271A1 (it) * 2020-03-25 2021-09-25 Antonio Francesco Chiriatti Lavatrice con unita´di bilanciamento e suo metodo di controllo
WO2023041789A1 (fr) * 2021-09-20 2023-03-23 Electrolux Appliances Aktiebolag Actionneur pour l'équilibrage actif d'une machine à laver
IT202100024053A1 (it) * 2021-09-20 2023-03-20 Electrolux Appliances AB Attuatore per bilanciamento attivo di lavatrice

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