EP2309051A1 - Waschmaschinen mit Frontladung und Verfahren zur Positionierung eines Wasserbeckens für die Waschmaschine - Google Patents

Waschmaschinen mit Frontladung und Verfahren zur Positionierung eines Wasserbeckens für die Waschmaschine Download PDF

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Publication number
EP2309051A1
EP2309051A1 EP10186859A EP10186859A EP2309051A1 EP 2309051 A1 EP2309051 A1 EP 2309051A1 EP 10186859 A EP10186859 A EP 10186859A EP 10186859 A EP10186859 A EP 10186859A EP 2309051 A1 EP2309051 A1 EP 2309051A1
Authority
EP
European Patent Office
Prior art keywords
tub
washing machine
positioning device
laundry
washing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10186859A
Other languages
English (en)
French (fr)
Inventor
Miguel Javier Caparrós Ezpeleta
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
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2309051A1 publication Critical patent/EP2309051A1/de
Withdrawn legal-status Critical Current

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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
    • D06F37/26—Casings; Tubs
    • D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
    • D06F37/268—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups for suspension devices
    • 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

Definitions

  • the invention relates to a washing machine of a front-loading type comprising a housing with a frontal opening for the insertion of laundry, a tub having a frontal orifice facing the frontal opening and hanging oscillatingly within said housing, a drum mounted in the interior of said tub, in which the laundry is insertable and which is rotatable around a horizontal axis, and said tub arranged in a working position in absence of laundry and washing liquid in said tub, and a gasket arranged in a relaxed state when said tub is in said working position, which gasket is coupled between said housing and said tub with a frontal flange connected to said frontal opening and a rear flange connected to said frontal orifice.
  • the invention relates to a method for positioning a tub of such washing machine.
  • a frame or housing forms an exterior of the washing machine and has a frontal opening for loading and unloading the laundry by means of a door.
  • a tub is suspended in the interior of the frame to hold the water and detergent used to wash the laundry.
  • a drum is installed for mixing the laundry with the water and detergent, which drum rotates about an axis of rotation when it is set in motion by a motor during a normal operating process (for example, washing or rinsing operations).
  • a ring-shaped gasket of plastic material is used between the tub and the housing as described in the document US 2005/0178169 A1 .
  • the gasket in the above-mentioned patent includes a shock cushion that is ring-shaped corresponding to the shape of the gasket, where a curved portion is formed with a length greater than that of the gasket as a U-shaped curve. Nevertheless, over the long term this U-shaped curve is bent until it breaks, especially in its lateral sections according to what has been detected, due to the uneven vibration in the gasket perimeter.
  • This gasket is mounted in a relaxed state, which is without prior tensions between the tub and the housing. When the drum is loaded with laundry, the tub is displaced downward forcing the gasket into a position that is under tension, and while the laundry cycle is carried out in this position the gasket sustains even more vibrations.
  • the gasket mounting in some commercial washing machines has been planned so that it will be in this relaxed state in a position where the drum is maximally loaded, or in the lowest possible working height/position.
  • the washing machine drum doesn't contain any laundry or water, it will be in the highest possible working position, and when it contains laundry although the wash water has been pumped out and the centrifugation is being done, it will be in a working position that is intermediate between the highest and lowest. This is done so that the gasket will be as close as possible to its relaxed state during the time of the washing process in which the most vibrations are produced.
  • a washing machine of a front-loading type comprising a housing with a frontal opening for the insertion of laundry, a tub having a frontal orifice facing the frontal opening and hanging oscillatingly within said housing, a drum mounted in the interior of said tub, in which the laundry is insertable and which is rotatable around a horizontal axis, and said tub arranged in a working position in absence of laundry and washing liquid in said tub, and a gasket arranged in a relaxed state when said tub is in said working position, which gasket is coupled between said housing and said tub with a frontal flange connected to said frontal opening and a rear flange connected to said frontal orifice, said washing machine also has a positioning device which can displace said tub to a position within a pre-defined position range, in which said working position is included, to carry out a washing process, with laundry placed in said drum and washing liquid introduced in said tub, in said position.
  • the gasket can be of smaller size because it is folded in an S-shape between the rear flange and the rear flange. It is advantageous if the predefined position range is as small as possible and will depend on the precision of the positioning device.
  • the washing machine is envisioned to have a position sensor provided to measure a position value of the tub and is connected to a positioning device, and which additionally emits a signal to the positioning device if the tub is not within the predefined position range. In this way, the positioning device recognizes the incorrect tub position immediately and can correct it immediately.
  • the connection between the sensor and the positioning device can be any type of connection, in particular by cabling or cordless.
  • the position sensor is a weight sensor that measures the position value depending on the weight of laundry and washing liquid present in the tub, and which emits a signal to the positioning device if the position value is outside the predefined position range.
  • the position sensor can be a type of scales that measures the weight of the drum and tub ensemble and compares this with the position value for the working position predefined at the factory. If any load is inserted into the interior of the drum or the tub, the values will not be equal and the sensor will send a signal to the displacement device to bring the tub within the predefined range for the working position.
  • the displacement sensor measures the position value depending on the distance to the tub and emits a signal to the positioning device if the position value is outside a predefined position range.
  • the sensor detects the position value and compares it with the working position, and when these are not equal it sends a signal to the displacement device to displace the tub to or sufficiently near the working position.
  • the predefined position range is a range within a scale of possible values for permitting tolerance to the system.
  • the sensor can sample position values constantly and send signals to the positioning device to displace the tub at any time during the laundry cycle until the drum is emptied.
  • the position sensor may measure the position value during any laundry wash cycle or washing process after the washing liquid has been introduced and emits a signal to the positioning device, and the positioning device displaces the tub to or near the working position.
  • the position sensor measures the position value during the laundry wash cycle after the washing liquid has been emptied and emits a signal to the positioning device, and the positioning device displaces the tub back again to the working position. Both particular features are times when the tub position changes upon gaining or losing weight of laundry and/or washing liquid.
  • the tub is hung from a minimum of one spring, the minimum of one spring is hung from the positioning device, and the positioning device raises the tub by means of the spring to the working position depending on the operating parameters of the spring.
  • the positioning device can be a system that is pneumatic, mechano-hydraulic, or any kind of servo system.
  • the tub rests on a minimum of one cushion or damper or suspensor
  • the minimum of one cushion rests on the positioning device
  • the positioning device raises the tub by means of a minimum of one cushion to the working position depending on the operative parameters of the cushions.
  • cushioning systems with springs including those in which the tub rests or is hung, and to which the positioning device can be connected.
  • the positioning device has a reservoir coupled with the tub and connected to a water intake for introducing washing liquid, which increases the weight of the ensemble formed from the reservoir and the tub, and to a reservoir drainage for draining wash water, which decreases the weight of the ensemble formed from the reservoir and the tub, to displace the tub to the working position.
  • the reservoir drains a portion of the liquid from its interior equivalent to the weight of the laundry; to introduce the washing liquid, it drains the equivalent of the liquid introduced into the drum; for centrifuging the machine, it drains the water from inside the tub and the positioning device opens the water intake of the reservoir and fills liquid that is an equivalent amount to the liquid drained.
  • Both the intake of water as well as the reservoir drainage can be controlled by electric valves that, in turn, receive the order to open and close from a positioning device controller according to the signal received from the position sensor.
  • the water drained by the reservoir can be drained to the tub when the reservoir drainage is connected hydraulically to the tub and used profitably for washing, and alternatively can be connected to the general drainage for the tub if the introduction of water to the tub during the washing cycle is unnecessary.
  • an object of the invention is to make available a method for washing that improves the dynamics of the oscillating unit of the front-loading washing machine, increases its useful lifetime and especially the useful lifetime of the gasket/bellows of the washing machine door.
  • a method for positioning a tub in a washing machine of a front-loading type comprising a housing with a frontal opening for the insertion of laundry, the tub having a frontal orifice facing the frontal opening of the housing hanging oscillatingly within the housing, a drum in the interior of the tub, in which the laundry is insertable and which is rotatable around a horizontal axis, and the tub arranged in a working position in absence of laundry and washing liquid in said tub, and a gasket arranged in a relaxed state when the tub is in the working position, which gasket is coupled between the housing and the tub with a frontal flange connected to the frontal opening, and a rear flange connected to the frontal orifice.
  • a positioning device is provided in the washing machine, which after placing laundry to be subjected to a washing process into the drum and introducing washing liquid into the tub, displaces the tub to a position within a pre-defined position range in which the working position is included, to carry out the washing process in the position.
  • the position of the tub may be managed and shifted at all times during the washing cycle and especially at those times when the load/weight in the interior of the drum changes.
  • a position sensor is included in the washing machine for measuring the position value of the tub, wherein the position sensor emits a signal to the positioning device if the tub is not within the pre-defined position range, and the positioning device displaces the tub if the tub is not within the pre-defined position range.
  • the positioning device introduces or drains the liquid of the reservoir until the tub is positioned within the working position range as explained above.
  • the horizontal axis 51 is arranged essentially in parallel to the floor and passes through the center of gravity of the oscillating unit and when the washing machine 1 is in a resting phase, at a distance from the floor that is defined as the working position H.
  • the resting phase is defined as when the machine is empty, without a load of laundry 3 or washing liquid.
  • the oscillating unit is the ensemble of the tub 4 with the drum 5 and all elements for the intake and drainage of washing liquid such as the motor 14 and fan belt 16 for transmission of rotation to the drum.
  • the invention can also be applied to this type of machine.
  • the washing machine 1 also has a gasket 6, arranged in a relaxed state when the tub 4 is in the working position H, and which is coupled between the housing 2 and the tub 4 with a frontal flange 62 connected to the frontal opening 21 of the housing, and a rear flange 64 connected to the frontal orifice 41 of the tub.
  • the frontal opening 21 of the housing 2 is closable with a door 18.
  • a position sensor 8 is connected with a controller 20 of the machine 1 and sends a signal to the positioning device 71 when the tub 4 is not in the working position H or is in a position within a predefined range that can be one-half centimeter above or below the working position H, or more precisely one millimeter above or below.
  • the position sensor 8 takes the position data with respect to the axis Z that is perpendicular to the floor and can position data regularly while the machine is operating, and in the case that the position value data is outside the predefined position range, it can send a signal to the positioning device 71 to displace the tub 4 into the predefined position range, preferably at the working position H.
  • the range is preferably defined in the controller 2 of the machine by the manufacturer.
  • Figure 2 is shown the same machine as in Figure 1 , loaded with laundry 3 before the washing cycle and still with the door 18 open. With the weight of the laundry 3, the tub 4 is displaced downward by a gap of ⁇ h. There will be a deformation in the gasket 6 relative to it relaxed position.
  • FIG 3 is shown the same machine as in the previous figures, with the laundry 3 and the washing liquid introduced into the tub 4 during the washing cycle with the door 18 closed.
  • the displacement device 71 is embodied as an elevator which is fitted to raise the ensemble of the tub 4 and drum 5 by means of a spring 9 to the working position H to operate in this position during the washing cycle.
  • a device similar to the foregoing can be arranged in the lower part of the machine in connection with the cushions 10 to raise or lower the tub according to need to situate it in the position range established about the working position.
  • the tub 4 In its lower portion, the tub 4 has a general drainage 12 for the emptying of the washing liquid during the washing cycle and at the end of same.
  • Figure 5 shows the machine of Figure 4 once the washing cycle and the emptying of the interior of the drum 5 have been completed.
  • the reservoir 42 from the positioning device 72 is filled with liquid and the reservoir drainage 46 is closed. In this way, the total weight is equilibrated to bring the tub 4 to the working position.
  • the embodiment of a positioning device with a mixture of the described positioning devices is also envisioned.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
EP10186859A 2009-10-08 2010-10-07 Waschmaschinen mit Frontladung und Verfahren zur Positionierung eines Wasserbeckens für die Waschmaschine Withdrawn EP2309051A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200930813A ES2376811B1 (es) 2009-10-08 2009-10-08 Máquina lavadora de carga frontal y método de posicionamiento de una cuba de dicha máquina lavadora.

Publications (1)

Publication Number Publication Date
EP2309051A1 true EP2309051A1 (de) 2011-04-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10186859A Withdrawn EP2309051A1 (de) 2009-10-08 2010-10-07 Waschmaschinen mit Frontladung und Verfahren zur Positionierung eines Wasserbeckens für die Waschmaschine

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EP (1) EP2309051A1 (de)
ES (1) ES2376811B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114892373A (zh) * 2022-06-27 2022-08-12 苏州三君智能科技有限公司 一种内嵌洗衣液自动加液器的洗衣机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2667574B1 (es) * 2016-07-21 2019-04-02 Bsh Electrodomesticos Espana Sa Pared lateral para un bastidor de un aparato domestico, bastidor, y aparato domestico

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4439153A1 (de) * 1994-11-03 1996-05-09 Miele & Cie Trommelwaschmaschine mit einem schwingend befestigten Waschaggregat
US20050178169A1 (en) 2004-02-13 2005-08-18 Kim Jae K. Gasket and drum-type washing machine having the same
DE102007038672A1 (de) * 2007-08-15 2009-02-26 Miele & Cie. Kg Frontbeschickbare Wäschebehandlungsmaschine sowie Verfahren zum Betreiben einer frontbeschickbaren Wäsche behandlungsmaschine
US20090139273A1 (en) * 2007-12-03 2009-06-04 Kim Na Eun Laundry machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5259218A (en) * 1991-09-19 1993-11-09 Ellis Corporation Force minimizing suspension system for rotary washer/extractors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4439153A1 (de) * 1994-11-03 1996-05-09 Miele & Cie Trommelwaschmaschine mit einem schwingend befestigten Waschaggregat
US20050178169A1 (en) 2004-02-13 2005-08-18 Kim Jae K. Gasket and drum-type washing machine having the same
DE102007038672A1 (de) * 2007-08-15 2009-02-26 Miele & Cie. Kg Frontbeschickbare Wäschebehandlungsmaschine sowie Verfahren zum Betreiben einer frontbeschickbaren Wäsche behandlungsmaschine
US20090139273A1 (en) * 2007-12-03 2009-06-04 Kim Na Eun Laundry machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114892373A (zh) * 2022-06-27 2022-08-12 苏州三君智能科技有限公司 一种内嵌洗衣液自动加液器的洗衣机
CN114892373B (zh) * 2022-06-27 2023-10-31 苏州三君智能科技有限公司 一种内嵌洗衣液自动加液器的洗衣机

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Publication number Publication date
ES2376811B1 (es) 2013-02-05
ES2376811A1 (es) 2012-03-20

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