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System and process for detecting a load of clothes in an automatic laundry machine

A technology for detecting automatic and washing machines, which is applied to the control device of washing machines, other washing machines, applications, etc., and can solve complex circuit, strong, frequent and other problems

Inactive Publication Date: 2006-06-28
MULTIBRAS SA ELETRODOMESTICOS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although this prior art solution has certain accuracy in laundry load load detection, it has the disadvantages that it requires a relatively complicated circuit and does not take into account the load generated by the friction of the movable part of the washing machine, which acts as a different component varies as a function of tolerances and manufacturing and assembly methods
[0011] In addition to the disadvantages mentioned above, the prior art solutions cited above suffer from measurement deviations due to the generation of noise in the power supply as a function of voltage variation, which can be intense and frequent
This prior art system does not yield satisfactory accuracy in detecting laundry loads, especially when the washing machine is installed in a power supply subject to high noise levels

Method used

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  • System and process for detecting a load of clothes in an automatic laundry machine
  • System and process for detecting a load of clothes in an automatic laundry machine
  • System and process for detecting a load of clothes in an automatic laundry machine

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Embodiment Construction

[0034] As described above and illustrated in accompanying drawing 1, the present system for detecting a laundry load is adapted to an automatic washing machine of the type having a structural housing 1 substantially defined by a The illustrated suspension is fitted with a bucket 2, said suspension system may have any suitable structure, whether or not belonging to the prior art; a substantially cylindrical bucket 2, in which the drum is axially rotatable 3; The drum 3 is basically in the form of a cylindrical drum having side walls and a bottom wall with through holes, the drum 3 is open above and dimensioned to accommodate a load of laundry to be washed. In a washing machine with a vertical shaft, such as that shown in the figures, the drum 3 has a bottom wall 3a fixed centrally to a hollow shaft 4 protruding vertically downwards and outwards from the tub 2, whereby by The bearing 5 on the fixed bearing seat 6 of the bottom wall 2a is supported. This assembly allows the drum...

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PUM

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Abstract

A system and method for detecting a laundry load in an automatic washing machine, comprising a voltage sensor (30), a rotational speed sensor (40), and associated timer (21), voltage sensor (30), and rotational speed sensor (40) A control unit (20) connected to the control unit is provided with data characterizing the average torque Mmot of the motor (10) in different voltage ranges, and with data characterizing the motor (10) when the drum (3) is in the unloaded state and when it contains the laundry load. ) data of the acceleration and deceleration reference time (Ta1 and Td1) between two different predetermined rotational speed values ​​of the motor (10), thereby calculating the moment of inertia (Jv, Jv, Jc), said control unit (20) calculates the difference between said moments of inertia (Jc and Jv) of the drum (3), generating a signal indicative of the mass of the laundry load.

Description

technical field [0001] The present invention relates to a system for an automatic washing machine, which can detect a load of clothes put into the washing machine and automatically select the washing water level supplied to the washing machine according to the washing program selected by the user. [0002] The invention also relates to a method for detecting a laundry load placed in a washing machine and a method for automatically selecting the wash water level supplied to the washing machine as a function of the detected laundry load. Background technique [0003] Various systems are known for detecting the load of laundry placed in a washing machine and thereby automatically determining and controlling the amount of wash water supplied to the washing machine, which is usually water, specifically fed to a tub, designed for The drum containing the laundry load is located in the tub, and the motor rotates the drum during the dehydration operation, and the motor also drives th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06F39/00D06F33/02D06F35/00
CPCD06F34/18D06F2103/04D06F2103/18D06F2103/44D06F2105/02
Inventor 安德烈·L·马丁斯若热·L·B·彭特亚多
Owner MULTIBRAS SA ELETRODOMESTICOS