FR2687176A3 - Washing machine with programmable control - Google Patents

Abstract

Washing machine controlled by program, with a rotary laundry drum, in which machine the time to speed up the laundry drum is measured until it reaches the speed of rotation for pressing the laundry against the drum wall or a predetermined speed of rotation, in that, after stopping the drive motor, the time to slow down the laundry drum until its immobilisation is obtained (acquired), in that the measurement values are sent to a fuzzy-logic processor or the like and in that, with the aid of this fuzzy-logic processor, control amplitudes for controlling the water inlet for each quantity of laundry and/or for controlling other parts of the process of the washing procedure are deduced from the difference between the time to speed up the laundry drum and the time to slow down the laundry drum.

Description

The invention relates to a washing machine, controlled by program,

  having a rotating laundry drum in a laundry container for loading laundry, a drive motor for the laundry drum and a water level regulator for controlling the supply of water for laundry levels different water in the detergent container, in which the laundry drum with the load of dry laundry is driven, at the start of the washing process, at a speed of rotation forming a ring of laundry against the carcass of the

drum.

  Washing machines of the type in question generally have an additional economic program touch

  for small quantities of laundry This action organ-

  characterized as a "1/2 key" has the effect, by manual switching on, of limiting the water levels

  for washing and rinsing or only for rinsing.

  For washing small quantities of laundry, this saves water, current and time. In addition, washing machines are known, in which, by manual activation of a "partial load" button. "The water supply to the detergent container is controlled by microprocessor according to the quantity of laundry and the capillarity of the laundry. The volume of water supplied is then entered during the prewash and is then adapted to the measurement. carried out during the washing and the first two rinsing cycles If the washing program starts, however directly with the washing, the water volume is here adapted

  only during the first two rinse cycles.

  With these known washing machines, the user must then, in all cases, activate the economic program keys by manually actuating the selected washing program. If he fails to actuate them when washing small quantities of laundry, these must be washed with too much water and thus with a

  energy consumption too high.

  The object of the invention is to replace the function of manual actuation of the economic program button with automatic control and measurement means, to thereby obtain an automatic adaptation of the volume of water required and the continuation of the progress of the program of

  wash with the quantity of laundry measured and entered.

  To achieve this objective according to the invention, it is therefore proposed to measure the speed up time of the laundry drum until reaching the rotation speed for plating the laundry or a predetermined rotation speed and entering, after the drive motor stop, time

  of slowing down the laundry drum until it stops

  tion and send these measurement values to a fuzzy processor or the like and, using this fuzzy processor, to deduce, from the difference between the speed up time of the laundry drum and the deceleration time from drum to

  laundry, control ranges for ordering the supply

  water quantity of each quantity of laundry and / or for controlling other parts of the washing process process By this measurement, the dimensions "quantity of laundry, ie volume of laundry" are determined automatically and, from from there, conclusions are drawn for the quantities of water necessary for washing and rinsing the laundry according to

  a specified amount of laundry.

  The work diagram in FIG. 1 represents the proposed method for determining the quantities of water. This therefore results, for example for a constant current consumption of the motor, until the motor current stops, reaching a speed of plating the load of dry laundry in the order of about 80 revolutions per minute or slightly

  below, a characteristic curve 1 with linear growth

  re With the shutdown of the laundry drum drive motor, the free deceleration of the laundry drum

  begins until it comes to a stop, the slowdown curve

  characteristic 2 initiating, then, approximately the speed designated By means of a microprocessor, which can be a fuzzy processor thus named presenting a fuzzy conclusion device or the like, it is then observed, from the difference between the rise time of the laundry drum and the slowdown time of the laundry drum than, for example, when the rise time of the laundry drum includes a longer period of time and the slowdown time of the laundry drum laundry is relatively short, the amount of laundry in the laundry drum is also relatively large.

  an increase in speed of the essential laundry drum-

  On the other hand, shorter compared to the deceleration time of the washing drum, the quantity of washing is smaller. Corresponding intermediate steps indicate, then, quantities of washing, which are between a large quantity of washing and a quantity of washing. less so that, for the washing of each quantity of laundry, there results a volume of water and a consumption of energy staggered accordingly. The work diagram of Fig 2 must represent it As shown here the characteristic curve 3, the volume of water required for small quantities of laundry "A" is therefore less, the volume of water required for medium quantities of laundry "B" increases accordingly, for a large quantity of laundry "C" , the maximum water volume is reached, at

  know admitted in the detergent container.

  The invention is described below, in a still more detailed manner, with the aid of another example embodiment for determining the particularly exact quantity of laundry. At the start of the washing cycle, the laundry drum comprising laundry which is still dry is brought to a speed of rotation (speed of plating of laundry), at which dry laundry forms a ring of laundry against the carcass of the laundry drum At this time, the time to reach the speed of rotation of linen placement, i.e. a predetermined time is measured In order to reduce inaccuracies here, the drive motor current or the phase angle of a cut command can also be kept constant simultaneously or be changed in a controlled manner After reaching the speed of rotation

  laundry placement or the predetermined rotation speed

  born, the current of the drive motor or the phase angle can again be measured, which is necessary for maintaining the speed of rotation of the laundry drum Thus, a second measurement for determining the volume of water is carried out by the moment of inertia A third additional measurement for the exact determination of the water volume is then obtained when the time or the modification of the adjustment parameters is still measured, until either

  reached a lower drum speed

  re by reducing the current of the drive motor to O or to a value lower than the previous one By the association of at least two measurement methods described previously and using a fuzzy processor thus called having a device for

  fuzzy conclusion and fuzzy control regulation, the volu-

  me of effective water is classified at least in trend with respect to the information "quantity of important linen"

  or "average amount of laundry" or "small amount of laundry".

  So, for example, pre-filling the detergent container

  with water and possibly also the entire pursuit

  re the washing program (washing cycle) can be ordered

  dice automatically Advantageously, the pre-filling at the start of the washing cycle is carried out so that, for small quantities of laundry, very little or no water is allowed, for large quantities of laundry a maximum pre-filling is carried out and for average quantities of laundry it is interpolated accordingly

  advantageous, it may also be that by other information

  tions gathered during the course of the program, such as

  for example the impregnation time or combined detergent bath

  born or similar, it is possible to reinforce the information obtained beforehand about the amount of water. In an improvement of the invention, it is also advantageous to make the volume of pre-filling of water depend during the cycles. of rinse cycles and even the number of rinse cycles, information about the volume of water In addition, the spin speed and / or the spin time can be changed so that for each volume of water , a

  approximately identical dehumidification is guaranteed.

Claims (2)

  1 washing machine controlled by program presented   both a rotating laundry drum in a laundry container for the laundry load, a drive motor for the laundry drum and a water level regulator for controlling the water supply for different water in the detergent container, in which the laundry drum with the load of dry laundry is driven, at the start of the washing process, at a speed of rotation forming a ring of laundry against the carcass of the drum, characterized in what the rise time of the laundry drum   is measured until the rotational speed is reached   linen placement or predetermined rotation speed-   mined, in that after stopping the drive motor, the   time the laundry drum slows down until it stops   stabilization is entered, in that the measured values are sent to a fuzzy processor or the like and in that, using this fuzzy processor, are deduced from the difference between the speed-up time of the drum at laundry and the slowdown time of the laundry drum, control ranges for controlling the water supply for each quantity of laundry and / or for controlling other   process parts of the washing process.   2 Washing machine controlled by program presented   both a rotating laundry drum in a laundry container for the laundry load, a drive motor for the laundry drum and a water level regulator for   control of the water supply for different water levels   in the detergent container, in which the laundry drum with the load of dry laundry is driven, at the start of the washing process, at a speed of rotation forming a ring of laundry against the carcass of the drum, characterized in that the time to reach the spinning speed of the laundry, or a predetermined rotation speed is measured and / or in that the motor current or the phase angle of a cut command is kept constant or is changed so controlled, and in that after reaching   the predetermined speed of rotation or the speed of   tion of the linen, the motor current necessary to maintain this speed of rotation or the phase angle is measured and / or in that the time or the modification of the adjustment parameters to reach a speed of rotation of the drum at lower or reduced determined linen is measured and in that the measurement amplitudes resulting from at least two of the aforementioned measurement methods are analyzed in a fuzzy processor comprising a fuzzy conclusion device in accordance with the conclusion rules applied and in that that from there is deduced a criterion, or an amplitude of control for the control of the water supply, namely, the volume of water required for each quantity of laundry and / or for the control of other process parts of the washing process.