EP1264925A2 - Waschmaschine mit einem Gewichtserfassungsmittel - Google Patents

Waschmaschine mit einem Gewichtserfassungsmittel Download PDF

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Publication number
EP1264925A2
EP1264925A2 EP02011152A EP02011152A EP1264925A2 EP 1264925 A2 EP1264925 A2 EP 1264925A2 EP 02011152 A EP02011152 A EP 02011152A EP 02011152 A EP02011152 A EP 02011152A EP 1264925 A2 EP1264925 A2 EP 1264925A2
Authority
EP
European Patent Office
Prior art keywords
washing machine
weight
washing
machine
vibration
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Withdrawn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
EP02011152A
Other languages
English (en)
French (fr)
Other versions
EP1264925A3 (de
Inventor
Giuseppe Frucco
Giovanni Colombera
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.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
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 Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Publication of EP1264925A2 publication Critical patent/EP1264925A2/de
Publication of EP1264925A3 publication Critical patent/EP1264925A3/de
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/18—Condition of the laundry, e.g. nature or weight
    • 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
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • 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

Definitions

  • the present invention refers to a washing machine, such as a clothes washing machine or a combined clothes washing and drying machine, provided with means adapted to measure the weight of the clothes loaded in a washing assembly that is suspended elastically to the framework of the machine with the aid of spring means such as vibration dampers or the like.
  • the load cell which is in fact arranged between the base of the machine and the floor, tends to measure the overall weight of the machine, including the weight of items that may possibly be placed or resting on the worktop of the same machine, so that the whole measurement system proves quite difficult to calibrate and rate and, anyway, weight measurements are quite likely to prove substantially inaccurate.
  • the washing machine is for example a clothes washing machine, or a combined clothes washing and drying machine, comprising an outer casing 1 that houses an oscillating washing assembly 2 which is elastically suspended to the framework of the washing machine by means of vibration-damping struts 3 and, possibly, also by means of springs 4.
  • the springs 4 may alternatively be incorporated directly into the vibration-damping struts 3, in a substantially per sé known manner.
  • the framework of the washing machine comprises in particular a base 5 that rests on the floor by means of support feet 6, preferably of the height-adjustable type.
  • the washing machine is provided with a programme sequence control unit 7, which may for instance comprise a microprocessor of the Motorola 6805 family, adapted to determine the operation of the operational parts and members of the machine and, in particular, to measure the weight of the clothes loaded in the washing, i.e. oscillating assembly 2 in accordance with a driving signal it receives from at least a displacement sensor 8 that shall be described in greater detail further on.
  • a programme sequence control unit 7 may for instance comprise a microprocessor of the Motorola 6805 family, adapted to determine the operation of the operational parts and members of the machine and, in particular, to measure the weight of the clothes loaded in the washing, i.e. oscillating assembly 2 in accordance with a driving signal it receives from at least a displacement sensor 8 that shall be described in greater detail further on.
  • Such a displacement sensor 8 is provided in association with at least one of the vibration-damping struts 3 and in particular, according to an aspect of the present invention, it is arranged between the vibration-damping strut 3 and the base 5 (or, anyway, the framework of the machine), upstream of support feet 6.
  • the senor 8 since the sensor 8 is located downstream of the vibration-damping strut 3, it is capable of detecting the displacements of the oscillating assembly 2 (in a substantially vertical direction) in a manner that is independent of the braking action introduced by the vibration-damping strut itself.
  • the sensor 8 is advantageously driven directly by the variations in the weight of the oscillating assembly 2 deriving from the clothes being loaded for washing in the oscillating assembly itself.
  • the sensor 8 since the sensor 8 is situated upstream of the support feet 6, its operation is not dependent on the overall weight of the washing machine and, furthermore, it is not affected by the weight of foreign items that may possibly be resting for instance on the worktop 9 of the washing machine.
  • the displacement sensor 8 may be embodied in a manner as illustrated in Figure 2, with an appropriately shaped linking member 10 that is adapted to move in a substantially vertical direction with respect to the base 5 of the machine.
  • the member 10 comprises a receptacle 11 capable of accommodating a corresponding end portion 12 of the vibration-damping strut 3, and it is preferably hinged at 13, in correspondence of an end portion thereof, on to a base member 14 attached to the base 5 of the machine in a removable manner, eg. by means of screws 15.
  • a transducer 16 for instance of an inductive type comprising a coil 17 and a core 18, which are connected to the stationary member 14 and the movable member 10, respectively.
  • the transducer 16 drives the programme sequence control unit 7, via a connection 19, with a signal that is representative of the displacements of the oscillating assembly 2 in a substantially vertical direction with respect to the framework of the machine.
  • the programme sequence control unit 7 is adapted to process such a signal in such a manner as to measure the weight of the clothes having been loaded in the oscillating assembly for washing.
  • such an operation is particularly easy, accurate and reliable to carry out, since all it takes for the actual weight of the clothes, i.e. the washload, to be calculated is to subtract the (well known) tare from the overall weight of the oscillating assembly 2, the displacements of which are influenced exactly by the weight of the clothes to be measured.
  • this weight measurement can advantageously be made still more accurate and simple if the moving member 10 is biased by upwards pushing elastic means, such as for instance a compression spring 20, having a substantially linear elastic deformation characteristic, as shown by way of example in Figure 3, at least within the normal working range of the spring 20.
  • elastic means such as for instance a compression spring 20, having a substantially linear elastic deformation characteristic, as shown by way of example in Figure 3, at least within the normal working range of the spring 20.
  • such a working range is indicated with the letter A and includes variations in the weight of the oscillating assembly 2 (in the case that there are provided two vibration-damping struts 3) ranging from 50/2 and 60/2 kg.
  • the measurement of the weight of the clothes loaded for washing turns out as being easily and readily repeatable over the time in an accurate manner, even by using a simple, low-cost processing of the signals generated by the transducer 16.
  • the signal that drives the programme sequence control unit 7 can also be used to measure off-balance states of the oscillating assembly 2 during spin-extraction phases of the washing cycle.
  • the entire displacement sensor 8 can be advantageously implemented as an integrated component part (comprising mainly the moving member 10, the spring 20 and the transducer 16) that can be tested and calibrated separately, i.e. off-line, before being actually assembled in position between the vibration-damping strut 3 and the base 5 of the machine.
  • a pneumatic capsule or cell 22 connected to an input 23 of an analogue pressure switch 24, or the like, adapted to drive the programme sequence control unit of the machine with signals that correspond to the pressure generated by said pneumatic cell 22 in response to and in accordance with the displacements of the moving member 10.
  • the pneumatic capsule 22 is provided with a vent 25 equipped with a normally closed controlled valve 26.
  • This valve 26 can be opened during spin-extraction phases so as to enable the capsule 22 to be freely deformed, thereby preventing it from breaking down, in response to the usually strong mechanical stresses imparted to the moving member 10 by the oscillating assembly 2.
  • washing machine may be the subject of a number of modifications without departing from the scope of the present invention.
  • the moving member 10 may be fastened to the base member 14 in a different manner, via one or several springs 20.
  • the spring 20 can be of the pulling type, instead of a compression or pushing one.
  • the washing machine according to the present invention is by all means capable of performing an accurate measurement of the weight of the clothes to be washed by using, rather than a delicate weight sensor, a displacement sensor which is particularly simple, reliable and capable of withstanding even the quite strong mechanical stresses that are usually imposed during spin-extraction phases of the washing cycles performed by the machine.

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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)
EP02011152A 2001-06-08 2002-05-21 Waschmaschine mit einem Gewichtserfassungsmittel Withdrawn EP1264925A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2001PN000041A ITPN20010041A1 (it) 2001-06-08 2001-06-08 Macchina lavatrice con sensore di peso
ITPN20010041 2001-06-08

Publications (2)

Publication Number Publication Date
EP1264925A2 true EP1264925A2 (de) 2002-12-11
EP1264925A3 EP1264925A3 (de) 2003-11-26

Family

ID=11453279

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02011152A Withdrawn EP1264925A3 (de) 2001-06-08 2002-05-21 Waschmaschine mit einem Gewichtserfassungsmittel

Country Status (2)

Country Link
EP (1) EP1264925A3 (de)
IT (1) ITPN20010041A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1382733A2 (de) * 2002-07-17 2004-01-21 Miele & Cie. KG Waschmaschine mit einem Waschaggregat
FR2898912A1 (fr) * 2006-03-27 2007-09-28 Brandt Ind Sas Dispositif de mesure de masse dans une machine a laver le linge
EP1988206A1 (de) * 2007-05-03 2008-11-05 Electrolux Home Products Corporation N.V. Waschmaschine mit verbessertem Sensor für das Beladungsgewicht
EP2159315A1 (de) * 2008-08-29 2010-03-03 Electrolux Home Products Corporation N.V. Induktiver Wandler für elektrische Haushaltsgeräte mit einem elektrischen Kalibriermodul und Verfahren zum Kalibrieren eines induktiven Wandlers
EP2251478A1 (de) * 2009-05-15 2010-11-17 Miele & Cie. KG Waschmaschine mit einem Laugenbehälter und einer Erfassungseinrichtung
EP2363525A3 (de) * 2010-03-05 2013-06-05 Samsung Electronics Co., Ltd. Waschmaschine und Vorrichtung zur Erkennung der Wäschemenge dafür

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6198289A (ja) * 1984-10-19 1986-05-16 株式会社日立製作所 全自動洗濯機
JPH0584382A (ja) * 1991-09-30 1993-04-06 Sanyo Electric Co Ltd 洗濯機
EP0972874A1 (de) * 1998-07-16 2000-01-19 Samsung Electronics Co., Ltd. Waschmaschine
JP2001120885A (ja) * 1999-10-27 2001-05-08 Sanyo Electric Co Ltd 重量センサおよび洗濯機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6198289A (ja) * 1984-10-19 1986-05-16 株式会社日立製作所 全自動洗濯機
JPH0584382A (ja) * 1991-09-30 1993-04-06 Sanyo Electric Co Ltd 洗濯機
EP0972874A1 (de) * 1998-07-16 2000-01-19 Samsung Electronics Co., Ltd. Waschmaschine
JP2001120885A (ja) * 1999-10-27 2001-05-08 Sanyo Electric Co Ltd 重量センサおよび洗濯機

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 413 (C-1092), 3 August 1993 (1993-08-03) -& JP 05 084382 A (SANYO ELECTRIC CO LTD), 6 April 1993 (1993-04-06) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 22, 9 March 2001 (2001-03-09) -& JP 2001 120885 A (SANYO ELECTRIC CO LTD), 8 May 2001 (2001-05-08) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1382733A2 (de) * 2002-07-17 2004-01-21 Miele & Cie. KG Waschmaschine mit einem Waschaggregat
EP1382733A3 (de) * 2002-07-17 2004-09-15 Miele & Cie. KG Waschmaschine mit einem Waschaggregat
FR2898912A1 (fr) * 2006-03-27 2007-09-28 Brandt Ind Sas Dispositif de mesure de masse dans une machine a laver le linge
EP1988206A1 (de) * 2007-05-03 2008-11-05 Electrolux Home Products Corporation N.V. Waschmaschine mit verbessertem Sensor für das Beladungsgewicht
RU2453642C2 (ru) * 2007-05-03 2012-06-20 Электролюкс Хоум Продактс Корпорейшн Н.В. Стиральная машина с датчиком веса загрузки
EP2159315A1 (de) * 2008-08-29 2010-03-03 Electrolux Home Products Corporation N.V. Induktiver Wandler für elektrische Haushaltsgeräte mit einem elektrischen Kalibriermodul und Verfahren zum Kalibrieren eines induktiven Wandlers
EP2251478A1 (de) * 2009-05-15 2010-11-17 Miele & Cie. KG Waschmaschine mit einem Laugenbehälter und einer Erfassungseinrichtung
EP2363525A3 (de) * 2010-03-05 2013-06-05 Samsung Electronics Co., Ltd. Waschmaschine und Vorrichtung zur Erkennung der Wäschemenge dafür

Also Published As

Publication number Publication date
ITPN20010041A1 (it) 2002-12-08
EP1264925A3 (de) 2003-11-26

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