JPH0433686A - Fully automatic washing machine - Google Patents

Abstract

PURPOSE:To detect the quantity of washing, to decide the kind of stain of the washing to automatically operate in accordance with the discrimination, and to sufficiently clean heavy stain such as oily stain, etc., by satisfactorily soaking the washing in a detergent, by setting the duty factor of a water current when stirring the washing corresponding to the change quantity of transmittance by a transmission detecting means after the lapse of a prescribed time. CONSTITUTION:A pulsator 1 is mounted rotatably on a washing tub 2, and it is driven by a motor 3 via a deceleration mechanism 4, and stirs the washing. At this time, the electromotive force data when the motor 3 is turned off is inputted to a cloth quantity detecting means 5 to detect the cloth quantity applied to the pulsator 1. A water level detecting means 6 detects the water level of the washing tub 2 in which water is supplied by a water supply means 7. A transmittance detecting means 8 is a means to detect the transmittance of water in the washing tub 2 by converting to a voltage by an optical sensor 10 provided at the upper part of a drainage means 9. A control means 11 sets the output of a cloth quantity detecting means 5, the water level detecting means 6, the transmittance detecting means 8 as input, and controls the washing machine so as to perform the automatic operation of soak washing, washing, rinsing, and dehydration.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fully automatic washing machine that is equipped with a cloth amount detection means and a permeability detection means and that automatically performs each process from soaking to dehydration.

BACKGROUND OF THE INVENTION In recent years, an increasing number of fully automatic washing machines are equipped with a soaking process to improve the cleaning efficiency of heavily soiled items such as oil stains.

Conventionally, in this type of fully automatic washing machine, in the soaking process, after water has been supplied to a preset water level, the pulsator is first rotated in reverse for a predetermined period of time to disperse detergent in the water and soak it into the laundry. Thereafter, the pulsator is reversely rotated for a predetermined time every time a predetermined period of time elapses, and this operation is repeated for a total of one hour.

Dip-washing in fully automatic washing machines is originally a method of soaking laundry with detergent solution and separating dirt by chemical action. It is intended to drop further.

Problems to be Solved by the Invention In such conventional fully automatic washing machines, the water level is set by the user based on intuition and experience, and a constant agitation water flow is used to mix the laundry and detergent, regardless of the type of dirt on the laundry. Stirring is in progress. Therefore, when a large amount of mechanical force is required, such as when the laundry is not sufficiently submerged or when there is heavy oil staining, there is a problem that the stain cannot be removed sufficiently.

The present invention solves the above problem by detecting the amount of laundry, determining the type of dirt on the laundry, and based on this determination, automatically operating the laundry to sufficiently soak the laundry in detergent solution. The purpose is to sufficiently remove even heavy dirt such as oil stains.

Means for Solving the Problems In order to achieve the above object, the present invention provides a cloth amount detection means for detecting the amount of laundry, a transmittance detecting means for detecting the light transmittance of water in the washing tub, Soak, wash, rinse,
control means for automatically operating dehydration, and the control means sets the water level based on the cloth amount detection means in the pre-soak washing process, and then controls the permeability of the permeation detection means after a predetermined period of time has elapsed. The solution to this problem is to set the duty ratio of the water flow during stirring according to the amount of change.

Effects of the present invention By using the problem solving means described above, it is possible to supply water in an amount corresponding to the amount of cloth, and it is also possible to soak and wash the laundry with a water flow that corresponds to the dirtiness of the laundry based on the amount of change in the permeability of the permeability detection means.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG.

As shown in the figure, a pulsator 1 is rotatably attached to a washing tub 2 and is driven by a motor 3 via a deceleration mechanism 4 to agitate the laundry. At this time, in order to detect the amount of cloth applied to the pulsator 1, the electromotive force data when the motor 3 is off is input to the cloth amount detection means 6. The water level detection means 6 detects the water level in the washing tub 2 supplied with water by the water supply means 7.

The transmittance detecting means 8 converts the transmittance of water in the washing tub 2 into a voltage and detects the same using an optical sensor 10 provided on the upper part of the drainage means 9. The control means 11 inputs the outputs of the cloth amount detection means 6, the water level detection means 6, and the permeability detection means 8, and outputs them to the motor 3, water supply means 7, and drainage means 9, and performs soaking, washing, rinsing, and dehydration. It controls the vehicle to operate automatically.

The operation in the above configuration will be explained.

FIG. 2 is a time chart of the transmittance during the soaking process, and FIG. 3 is a flowchart showing the main part of the flowchart under the control of the control means 11.

In FIG. 3, when entering the pre-soaking process, the control means 11 first determines the amount of laundry using the cloth amount detection means 5 in step 2o. Next, in step 21.22, the amount of cloth is less than 1.5KF, 1.5 is 9 or more and less than 3Kp,
Steps 23, 24, and 25 are divided into the above three stages.
The water level is set to low water level, medium water level, and high water level respectively. Next, in step 26, it is determined by the water level detection means e whether the set water level υ has been reached, and if the water level has not been reached, water is supplied to the set water level in step 27. With this water supply operation, a water level was obtained at which the cloth was sufficiently immersed in the detergent liquid according to the amount of cloth.

Next, the control means 11 determines in step 28 whether or not the time t1 minute for the detergent to be sufficiently dissolved in water has elapsed, and if it has not elapsed, in step 29, stirring is performed for 1 second on and 1 second off to dissolve the detergent in the water. Melt it. When t1 minutes have elapsed, the process proceeds to step 3o, where the initial transmittance (d
Enter o). Further, step 31 takes 12 minutes (12>
11) Determine whether the elapsed time has elapsed, and if it has not elapsed, stop at step 32 for 3 minutes, 1/1 second QN1 second ○ FF water flow 1
Repeat for up to 2 minutes. This action causes the dirt on the cloth to gradually seep into the water. When t2 minutes have passed, step 33
Proceed to and enter the water permeability (dl) again. The time chart of permeability during this stirring operation is shown in Figure 2. In the case of heavy dirt such as oil stains, the permeability decreases at an almost constant rate, but in the case of muddy stains, the permeability drops significantly at the beginning. After that, it becomes almost constant. Using this characteristic, the control means 11 distinguishes the amount of change in transmittance between tl and t2 (do-dl) into three stages: less than 1v, 1v or more and less than 2v, and 2■ or more in step 34.35, and in step 36 , 37
.

38, turn on each stirring water stream for 2 seconds, turn off for 1 second, 1
Seconds ON, 1 second OFF, o, 5 seconds ON, 1 second OFF
Set d. Next, in step 39, it is determined whether the total soaking time has elapsed, and if it has not elapsed, in step 40, the agitation is repeatedly stopped using the agitation water flow set in steps 36, 3, and 38.

According to the fully automatic washing machine of the embodiment of the present invention, the water level can be set according to the amount of laundry, and the degree of soiling of the cloth can be determined based on the amount of change in permeability after a certain period of time. The duty ratio of the water flow for subsequent stirring can be changed depending on the degree of stirring.

Effects of the Invention As is clear from the above embodiments, according to the present invention, the control means sets the water level based on the cloth amount detection means in the pre-soak washing process, and then controls the permeation rate detection means after a predetermined period of time has elapsed. Since the duty ratio of the water flow during agitation is set according to the amount of change in temperature, it is possible to sufficiently soak the cloth in the detergent solution regardless of the amount of cloth, and it can also remove heavy stains such as oil stains. You can drop it enough.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a fully automatic washing machine according to an embodiment of the present invention, Fig. 2 is a time chart of the transparency of the soaking process of the same fully automatic washing machine, and Fig. 3 is a block diagram of the fully automatic washing machine of the same fully automatic washing machine. It is a flowchart. 2...washing tub, 5...cloth amount detection means,
8... Transmittance detection means, 11... Control means. Name of agent: Patent attorney Shigetaka Awano and 1 other person @
1 figure
2-E Sakihama 1] 2Fi4 Tyr Tower Figure 3

Claims (1)

[Claims] A cloth amount detection means that detects the amount of laundry, a transmittance detection means that detects the degree of light transmission of water in the washing tub, and each process of soaking, washing, rinsing, and spin-drying is automatically operated. and a control means, the control means sets the water level based on the cloth amount detection means in the soaking process, and then stirs according to the amount of change in permeability detected by the permeability detection means after a predetermined period of time has elapsed. A fully automatic washing machine that allows you to set the duty ratio of the water flow.