JPS6063096A - One-tub dehydration washer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single-row dehydrating washing machine comprising an inner tank and an outer tank housing the inner tank. In a configuration in which the light emitted from the light emitting element is received by the light receiving element through the washing liquid or rinsing liquid, when detecting the turbidity of the liquid depending on the amount of received light, it is necessary to detect the turbidity of the liquid. The purpose of this invention is to reliably detect changes in turbidity of washing liquid or rinsing liquid by reducing the influence of bubbles contained in the washing liquid or rinsing liquid.

Generally, during washing, since detergent is contained in the washing liquid, a large amount of foam is generated due to the mechanical force during washing. For this purpose, a light emitting element and a light receiving element are installed in a part of the outer tank.
When detecting changes in the turbidity of the liquid depending on the amount of light received by the light receiving element when the light emitted from the light emitting element is received, a large amount of bubbles will block the light emitted from the light emitting element, causing the washing liquid to Even if it was not contaminated, the turbidity would show a high value, making it impossible to accurately detect the turbidity level.

The present invention solves the above-mentioned conventional drawbacks, and embodiments thereof will be described below with reference to the accompanying drawings.

In Fig. 1, 1 is the main body of the washing machine, 2 is an outer tank, and 3 is an inner tank for washing clothes rotatably arranged in the outer tank 2. During spin-drying, the inner tank 3 is connected to a spin-drying shaft 4. It rotates around the center to perform centrifugal dehydration. The wall of the inner tank 3 has a large number of holes 5. Reference numeral 6 denotes a motor attached to the lower part of the outer tank 2, and its rotation direction is controlled by a timer so as to alternate between forward and reverse rotation. Further, when the direction of rotation of the motor 60 changes, that is, a certain stopping time is provided between forward rotation and reverse rotation, and between reverse rotation and forward rotation.

Reference numeral 7 denotes a turbidity detection case attached to the outer tank, inside of which a light emitting element and a light receiving element (both not shown) are provided facing each other, and between the light emitting element and the light receiving element. The washing or rinsing liquid can freely flow in and out.

8 is a mechanical case with a built-in brake/clutch mechanism. 9 is a suspension that suspends and supports the outer tank 2, 1
o is a stirring blade arranged at the inner bottom of the inner tank 3, and the motor 6
It rotates when it receives the rotational force of.

The rotational force of the motor 60 acts to rotate the inner tub 3 in one direction during spin-drying.The brake/clutch mechanism switches power transmission between washing/rinsing and spin-drying.

In the above configuration, when a light emitting element and a light receiving element are provided facing each other in a part of the outer tank 2, and the light emitted from the light emitting element is received by the light receiving element through the washing liquid or the rinsing liquid,
When the turbidity of the liquid is detected by the amount of light received, and the degree of cleaning, washing, or rinsing is to be detected based on the amount of change in turbidity, etc., the mechanical power of the detergent and washing machine is As a result, a large amount of bubbles are generated and are present in the liquid.

As a result, the bubbles block the light emitted from the light emitting element, reducing the amount of light received by the light receiving element, increasing the turbidity even if the liquid is clean, and causing erroneous detection. Therefore, it is necessary to reduce the influence of bubbles as much as possible.

The cause of foam is detergent and the mechanical force of the washing machine, but reducing the amount of detergent cannot be done because this will reduce the cleaning power.

Therefore, if we consider the mechanical force of a washing machine, the mechanical force of the washing machine is generated by the motor 6 that rotates the stirring blades 10 in forward and reverse directions. The magnitude of torque differs depending on the Therefore, the amount of bubbles generated differs depending on the direction of rotation. Furthermore, since the inner tank 3 is rotated entirely during dehydration, a large torque is required in the dehydration rotation direction, so the motor 6 is designed to use the rotation direction in which the torque is large. Therefore, the second
As shown in the figure, it can be said that anti-dehydration rotation produces fewer bubbles and fewer false detections due to the influence of bubbles.

That is, in the figure, A indicates when the motor 6 rotates in the dehydration rotation direction, and B indicates when the motor 60 rotates in the anti-dehydration rotation direction, and it can be seen that the turbidity in B is lower than in A. Therefore, the stop time after the motor 6 rotates in the anti-dehydration direction, that is, &1+82. in FIG. a3 +・&4...
If turbidity is detected in ..., the influence of bubbles can be reduced and accurate detection can be achieved.

Next, since the bubbles in the liquid are light, they tend to rise to the surface of the liquid, so when the motor 6 is stopped, the bubbles gradually disappear from the detection section. Therefore, we will consider how much stopping time is required until the bubbles disappear from the detection unit and the bubbles no longer affect turbidity detection. In Figure 3, the vertical axis shows turbidity, and the horizontal axis shows time. After washing from point A to point B, the motor 6 is stopped and the turbidity changes, and the turbidity is stable. It takes more than 30 seconds to do so. Therefore, if the stop time provided when changing the rotational direction of the motor 6 is set to about 30 seconds, the turbidity of the liquid can be accurately detected without the influence of bubbles.

Considering the above, the stopping time when changing the rotation direction of the motor 6 which rotates forward and backward is about 30 seconds, and after this stopping, bl, b2 in FIG. b3...
If the turbidity is detected at this point, the turbidity of the liquid can be accurately detected without being affected by bubbles. In addition, in Figure 4,
A and B have the same meaning as in FIG. C indicates the stop time period.

As described above, according to the present invention, during washing a or rinsing, the influence of foam is reduced by detecting the turbidity of the washing liquid or rinsing liquid during the stop time after the motor rotates in the anti-dehydration rotation direction. It is possible to prevent erroneous turbidity detection, and more preferably, by extending the stop time of the motor, bubbles can be removed from the detection area, and there are no bubbles between the light emitting and light receiving elements. This provides effects such as being able to more accurately detect the turbidity of the liquid.

[Brief explanation of the drawing]

Fig. 1 is a schematic vertical cross-sectional view of a single-tub dehydrating washing machine according to an embodiment of the present invention, and Fig. 2 shows the relationship between turbidity and washing time when the motor rotates in the forward and reverse directions. Figure, 3rd
This figure shows the change in turbidity when the rotation of the motor is stopped, and FIG. 4 shows the change in turbidity when the motor stop time is set to 3θ seconds. 2...Outer tank, 3...Inner tank, 6...
Motor, 7...Turbidity detection case, 10...
...Agitation blade. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 1 2 1θ Maedan Time Lock - Figure 3 ai *rJ) @) - Figure 4 Shisen Rumoe' Tsukasa -

Claims (1)

[Claims] There is an inner tank, an outer tank that rotatably houses the inner tank, and a stirring blade placed at the bottom of the inner tank that rotates forward and backward during washing and rinsing. A light emitting element and a light receiving element are provided facing each other at the bottom of the outer tank, and the light emitted from the light emitting element is passed through washing liquid or rinsing liquid to the light receiving element. and is configured to detect a change in turbidity based on the magnitude of the amount of received light, and the detection of the change in turbidity is executed when the rotation of the mortar corresponding to the anti-dehydration rotation direction of the inner tank is stopped. A single-tank dewatering and washing machine configured as follows.