EP2643511B1 - Système pour équilibrer des forces d'inertie de rotation pendant une centrifugation dans une machine à laver - Google Patents

Système pour équilibrer des forces d'inertie de rotation pendant une centrifugation dans une machine à laver Download PDF

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Publication number
EP2643511B1
EP2643511B1 EP11785432.3A EP11785432A EP2643511B1 EP 2643511 B1 EP2643511 B1 EP 2643511B1 EP 11785432 A EP11785432 A EP 11785432A EP 2643511 B1 EP2643511 B1 EP 2643511B1
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EP
European Patent Office
Prior art keywords
valves
drum
pockets
laundry
accordance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP11785432.3A
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German (de)
English (en)
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EP2643511A2 (fr
Inventor
Guido Danieli
Carlo Innocenti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Filing date
Publication date
Priority claimed from ITCS2010A000017A external-priority patent/IT1405485B1/it
Priority claimed from IT000006A external-priority patent/ITCS20110006A1/it
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL11785432T priority Critical patent/PL2643511T3/pl
Publication of EP2643511A2 publication Critical patent/EP2643511A2/fr
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Publication of EP2643511B1 publication Critical patent/EP2643511B1/fr
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • 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
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/16—Imbalance

Definitions

  • the present Invention relates to a system to balance rotating inertia forces generated by poor distribution of laundry in a rotating drum in a washing machine having the drum placed in a tub, the system including a vibration measuring system, a controlling system and a system to generate counteracting forces and provided to regulate the Intensity thereof, in order to take into account progressive dewatering of the laundry during a centrifugation phase, the measuring system including a sensor, the control system comprising an electronic circuit and processor, and the system of generation of counteracting forces of variable intensity comprising a system of pockets open at the minimum radius, or watertight pockets, located at a circumference of the drum.
  • washing machines Including a tub for holding washing and rinsing liquid, systematically termed “water” herein, and a rotatable drum for holding laundry to be treated in washing, rinsing, end centrifugation phases, often vibrate during the centrifugation phase, sometimes quite heavily, and this is because of an uneven distribution of the laundry In the drum, which produces a system of forces on the washing machine.
  • This system of forces may gradually decreases in intensity as the laundry expels the water due to the said centrifugation, or possibly change due to different absorption characteristics of individual items.
  • these vibrations force manufacturers to make washing machines heavier by adding additional masses, and on the other hand, may require to reduce the diameter of the drum so that the tub containing it does not hit the outer structure including the casing of the washing machine, the tub being connected to the casing by a damping spring system.
  • the said limitation of the drum diameter is considered a negative factor, as it reduces the amount of laundry that can be washed per cycle.
  • US 5,829,084 A or US 3,088,522 A A system to balance a rotating inertia forces generated by a poor distributed laundry in a drum of a washing machine is disclosed in US 5,829,084 A or US 3,088,522 A .
  • These systems comprise pockets mounted at the circumference of drum and fillable with water to generate counteracting forces and provided to regulate the intensity thereof.
  • the system further comprises a control system which control vales for dewatering the pockets wherein the vales are operated by a mechanical force generated by a movement of the drum.
  • US 5,829,084 A further disclose a system wherein the valves are controlled electrically by solenoids which generate a force if electrical contact will be closed due to said drum movement.
  • the goal of the present invention is therefore to provide a system that makes its possible to minimise or even completely eliminate the said vibrations.
  • prior art it has been considered to implement a system based on the use of shafts with eccentric masses whose radiuses could be varied.
  • This system is flawed in that it requires too extensive changes to the current architecture of a washing machine, and so it has been determined to propose a new system that obtains the same effects with fewer structural modifications.
  • a system to balance rotating inertia forces generated by poor distribution of laundry in a rotating drum in a washing machine having the drum placed in a tub including a vibration measuring system, a controlling system and a system to generate counteracting forces and provided to regulate the intensity thereof, in order to take into account progressive dewatering of the laundry during a centrifugation phase
  • the measuring system including a sensor, the control system comprising an electronic circuit and processor, and the system of generation of counteracting forces of variable intensity comprising a system of pockets open at the minimum radius, or watertight pockets, located at a circumference of the drum, which may be filled with water via first valves controlled by the control system, and then selectively emptied via second valves also controlled by the control system, so as to generate a rotary force of equal intensity to that produced by the laundry but in the opposite direction and of variable intensity.
  • the basic idea is to generate two toroidal cavities located laterally inside the drum, divided with dividers or by other suitable means into a series of pockets which may be filled with water, and may be selectively emptied in order to generate inertia forces able to offset those generated by a poor distribution of the laundry.
  • these pockets can be constructed as integral elements of the drum and located inside or outside the circumference of the drum, or may even consist of additional plastic or metal elements installed in the drum.
  • These pockets can be open at their respective minimum radius, or watertight and located internally, but with first valves for filling, located at the top, inside. Second valves, located in peripheral positions must be present however and must be used for the controlled drainage of the said pockets. Of course, it is clear that the first and second valves should be carefully controlled.
  • Opening and closing can be controlled externally, by means - for example, but not exclusively - of the activation of solenoids located outside the tub, which generate electromagnetic forces when the first and second valves to be actuated are passed along.
  • solenoids located outside the tub, which generate electromagnetic forces when the first and second valves to be actuated are passed along.
  • An angle encoder can control the position of the drum, in order to detect when a particular valve will be in the right position to be actuated. However, the encoder could be replaced by analysts of the accelerations, possibly with the addition of field sensors (Hall effect or otherwise).
  • the system may operate as follows: During a rinse phase preceding a centrifugation phase the drum is brought, in sequence, into positions with each pocket centred at the lowest point. The respective first valve is then opened until the pocket is completely full, and then the system moves on to the subsequent pocket. Then, when the centrifugation phase starts, it may initially be at low speed, in order to ascertain generation of low mechanical stress. But this makes it possible to determine the angular positions in which there are imbalances. Having done this, the additional useful imbalance can be calculated and water outlets can be activated from the pockets not needed to balance the rotating drum, leaving just enough water to obtain the desired result.
  • the basic concept is to fill the pockets in the drum selectively at the beginning of the centrifugation phase, utilising first valves controlled in a timed fashion by the control system, after determining the position and entity of the unbalancing mass using appropriate sensoring means like accelerometers.
  • the second valves can be operated solely to correct minor errors and to gradually decrease the forces of inertia as the laundry is dewatered.
  • the geometry of the washing machine and the drum may remain as described above, in the case of the pockets open at the inner radius filled from both sides, but what varies is the filling, which takes place in timed fashion after determining, by measurement, the entity and direction of the imbalance.
  • first valves one per side
  • second valves will still be useful to adjust any supply error, but above all to gradually decrease the balancing mass as the laundry is dewatered.
  • Figure 1 features a diagram that represents the drum in a frontal and lateral semi-section view and, in the event of pockets open at the minimum radius, shows the division of the toruses into pockets 1, the drainage valve shutter with axial actuation 2, the relative openings at the minimum radius 3, and in the lateral semi-section view, the water supply conduits 4 that are part of the tub containing the drum 5, and the actuation solenoids for the drainage valves 6.
  • Figure 2 features a frontal view of both the solenoids that control the opening of the lower first valves 7, for the filling, and of the upper second valves 8 to allow air to be released, which are located on the top of the pockets, inside, and the solenoids that control the second valves in the event of radial control 9, while on the left-hand side of the semi-section view the shutters of the first valves 10 can be seen, and on the right-hand side the outside of the circumference of the drum is shown, with the radial second valves 11 visible.
  • the second valves 11 can obviously be actuated both radially and axially, and applied to both open pockets and sealed ones; it has simply been decided to show the possible positions of the solenoids in the two Figures, without this rendering the use of one or the other type of actuation obligatory according to the chosen pocket type.
  • these second valves 11 can be actuated both in a radial direction (but in this case the forces necessary for actuation will have to be much greater to overcome the centrifugal force) and in a direction parallel to the drum axis.
  • a ferromagnetic element could simply be incorporated into the shutter 13, which would open towards the outside because it was attracted thereto, rather than inwards because it was repulsed, but in the first case a higher current intensity would be required.
  • opening will have to occur by attracting the shutter 134 instead of repelling it, which is more complex, unless the water is drained towards the inside of the drum instead of outwards, and in this case the solenoid 12 could only act by solely attracting the ferromagnetic stainless steel spring 19, but in a less efficient manner from an energy consumption viewpoint.
  • valves As far as the first valves are concerned, these can be realized as shown, for example, in Figure 5 , by way of a non-limiting example of a preferred embodiment.
  • the valve On the left, the valve is closed; on the right it is open.
  • the opening is controlled by the solenoid 22 located on the tub 23, which acts from outside the drum 24, by pressing directly on the valve stem 25, since - in this case - the drum is stationary, while the valve is open towards the inner surface of the bag 26.
  • Figure 6 shows a magnetically actuated first valve, therefore without a contact, where the presence of a permanent magnet 27 can be seen.
  • Figure 7 features a diagram that represents the drum in a frontal and lateral semi-section view and, in the event of pockets 1 open at the minimum radius, shows the division of the toruses into pockets 1, the second valve shutter with axial actuation 2, the relative openings at the minimum radius 3, and in the lateral semi-section view, the accelerometer 28, the water supply conduits 29 that are part of the tub containing the drum 5, the actuation solenoids for the second valves 30, the solenoid valves for incoming flow controlling and timing 31, and the auxiliary pump for the injection of the balancing water 32.
  • opening will have to occur by attracting the shutter 35 instead of repelling it, which is more complex, unless the water is drained towards the inside of the drum instead of outwards, and in this case the solenoid 34 could only act by solely attracting the ferromagnetic stainless steel spring 37, but in a less efficient manner from an energy consumption viewpoint.

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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)

Claims (13)

  1. Système pour équilibrer des forces d'inertie de rotation générées par une mauvaise répartition du linge dans un tambour rotatif (5, 15, 24) d'une machine à laver comprenant le tambour (5, 15, 24) placé dans une cuve (21, 23, 39), le système comprenant un système de mesure de vibrations, un système de commande et un système pour générer des forces antagonistes et prévu pour réguler l'intensité de ceux-ci, afin de tenir compte de la déshydratation progressive de la lessive pendant une phase de centrifugation, le système de mesure comprenant un capteur (28), et le système de génération de forces antagonistes d'intensité variable comprenant un système de poches (1) ouvert à un rayon minimum (3, 33), ou des poches étanches à l'eau, situées à une circonférence du tambour (5, 15, 24), qui peuvent être remplies avec de l'eau (32) via des premières soupapes (7, 10) commandées par le système de commande, puis vidées sélectivement par l'intermédiaire de secondes soupapes (8, 11, 30) également commandées par le système de commande, de manière à générer une force de rotation d'intensité égale à celle produite par le linge mais dans la direction opposée et d'intensité variable, dans lequel l'ouverture et la fermeture des soupapes (10, 11, 30) sont commandées par l'intermédiaire de l'activation de solénoïdes (12, 16, 22) lesquels génèrent des forces électromagnétiques lorsque les premières et les secondes soupapes (7, 8, 10, 11, 30) à actionner sont passées le long et les premières et secondes soupapes (7, 8, 10, 11, 30) sont des obturateurs (13, 17, 35, 134) incorporant un matériau ferromagnétique ou des aimants permanents (17, 27), qui peuvent être attirés ou repoussés par une inversion appropriée du courant dans les solénoïdes (12, 16, 22), caractérisé en ce que le système de commande comportant un circuit électronique et un processeur et une série desdits solénoïdes (12, 16, 22) sont positionnés en parallèle le long de la surface de la cuve (21, 23, 39).
  2. Système selon la revendication 1, dans lequel l'obturateur (13, 17, 35, 134) est repoussé par un champ magnétique puissant par ladite série de solénoïdes (12, 16, 22) munis d'un noyau en fer doux (14), de sorte que les surfaces de l'obturateur (13, 17, 35, 134) et le noyau en fer doux (14) ne viennent pas en contact direct, étant donné qu'il se contentent de repousser les obturateurs de manière à ouvrir les secondes soupapes (11).
  3. Système selon l'une quelconque des revendications 1 et 2, dans lequel le capteur comprend au moins l'un d'un vibromètre, d'un accéléromètre (28), et d'un solénoïde qui mesure le mouvement dans la cuve ou dans la structure de la machine à laver.
  4. Système pour équilibrer des forces d'inertie de rotation générées par une mauvaise répartition du linge dans un lave-linge, selon l'une quelconque des revendications précédentes, dans lequel le système de poches (1) fait partie intégrante du tambour (5,15,24).
  5. Système pour équilibrer des forces d'inertie de rotation générées par une mauvaise répartition du linge dans un lave-linge, selon l'une quelconque des revendications précédentes, dans lequel les poches (1) sont ouvertes à un rayon minimum (3, 33) et situées à l'extérieur de la circonférence du tambour (5, 15, 24).
  6. Système pour équilibrer des forces d'inertie de rotation générées par une mauvaise répartition du linge dans un lave-linge, selon l'une quelconque des revendications 1 à 4, dans lequel les poches étanches à l'eau sont situées à l'intérieur de la circonférence du tambour (5, 15, 24).
  7. Système pour équilibrer des forces d'inertie de rotation générées par une mauvaise répartition du linge dans un lave-linge, selon l'une quelconque des revendications précédentes, dans lequel les premières soupapes (7, 10) sont positionnées sur des surfaces intérieures respectives des poches (1), à une distance de l'axe de rotation, et dans lequel les premières soupapes (7,10) sont commandées depuis l'extérieur de la cuve par des systèmes d'actionnement appropriés commandés électroniquement du système de commande, pour le remplissage des poches avec de l'eau (32) étant donné qu'ils sont dans leurs positions respectives les plus basses lors de la rotation du tambour (5, 15, 24).
  8. Système selon la revendication 7, dans lequel les systèmes d'actionnement comprennent des solénoïdes (12, 16, 22) destinés à agir sur les premières soupapes à travers l'une des cames (25) et des moyens magnétiques (27).
  9. Système selon l'une quelconque des revendications 7 et 8, dans lequel les premières soupapes peuvent s'ouvrir dans des directions axiale ou radiale, soit par une d'attraction ou une répulsion d'un matériau ferromagnétique inclus dans les systèmes d'actionnement respectifs.
  10. Système pour équilibrer des forces d'inertie de rotation générées par une mauvaise répartition du linge dans un lave-linge selon l'une quelconque des revendications précédentes, dans lequel des dispositifs d'actionnement commandés électroniquement sont prévus pour les secondes soupapes (8, 11, 30) pour actionner les secondes soupapes (8, 11, 30) d'une manière appropriée et en temps utile pendant la rotation du tambour.
  11. Système selon la revendication 10, dans lequel les systèmes d'actionnement pour les secondes soupapes (8, 11, 30) comporte des solénoïdes (34) destinés à agir sur les secondes soupapes (8, 11, 30) à travers l'une des cames et des moyens magnétiques.
  12. Système selon l'une quelconque des revendications 10 et 11, dans lequel les secondes soupapes (8, 11, 30) peuvent s'ouvrir dans des directions axiale ou radiale soit par une d'attraction ou une répulsion d'un matériau ferromagnétique inclus dans les systèmes d'actionnement.
  13. Système selon l'une quelconque des revendications précédentes, dans lequel le dispositif de commande est programmé de manière à remplir uniquement les poches (1) positionnées en face de tout balourd détecté par le système de commande avec de l'eau (32), et vidées ensuite sélectivement par l'intermédiaire des secondes soupapes (8, 11, 30) de façon à générer une force de rotation d'intensité égale à celle produite par le linge mais dans la direction opposée et d'intensité variable.
EP11785432.3A 2010-11-22 2011-11-22 Système pour équilibrer des forces d'inertie de rotation pendant une centrifugation dans une machine à laver Active EP2643511B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11785432T PL2643511T3 (pl) 2010-11-22 2011-11-22 System do równoważenia obrotowych sił bezwładności podczas wirowania w pralce

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITCS2010A000017A IT1405485B1 (it) 2010-11-22 2010-11-22 Sistema per il controllo delle vibrazioni durante la centrifugazione in una lavatrice domestica.
IT000006A ITCS20110006A1 (it) 2011-03-02 2011-03-02 Sistema di bilanciamento delle forze d'inerzia rotanti generate dalla maldistribuzione dei panni in una lavatrice
PCT/EP2011/070692 WO2012069479A2 (fr) 2010-11-22 2011-11-22 Système pour équilibrer des forces d'inertie de rotation pendant une centrifugation dans une machine à laver

Publications (2)

Publication Number Publication Date
EP2643511A2 EP2643511A2 (fr) 2013-10-02
EP2643511B1 true EP2643511B1 (fr) 2015-10-14

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EP11785432.3A Active EP2643511B1 (fr) 2010-11-22 2011-11-22 Système pour équilibrer des forces d'inertie de rotation pendant une centrifugation dans une machine à laver

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EP (1) EP2643511B1 (fr)
PL (1) PL2643511T3 (fr)
WO (1) WO2012069479A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2566475A (en) * 2017-09-14 2019-03-20 Tochi Tech Ltd Washing machine water circulation system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1108170B (de) * 1958-12-31 1961-06-08 Bbc Brown Boveri & Cie Vorrichtung zum Ausgleichen der Unwucht in Wasch- und Schleudermaschinen mit horizontaler Welle
US5582040A (en) * 1995-08-09 1996-12-10 Khan; Aman U. Water balancing apparatus for horizontal axis and vertical axis laundry appliances
US5829084A (en) * 1997-06-02 1998-11-03 Fujiwara; Leslie H. Method and system for balancing an upright washing machine

Also Published As

Publication number Publication date
PL2643511T3 (pl) 2016-03-31
WO2012069479A3 (fr) 2012-11-08
WO2012069479A2 (fr) 2012-05-31
EP2643511A2 (fr) 2013-10-02

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