JPS60210297A - 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] b) Industrial application field The present invention relates to a washing machine.

(b) Prior art As a device for detecting the turbidity of rinse water in order to detect the condition of rinsing in a washing machine, the Japanese Patent Publication No. 58-120
As shown in Publication No. 40 (see FIG. 4), a pair of 7IC first light emitting/receiving elements (7 51, 7 (52), and a second light-emitting light-receiving element pair (533 (54) and the first light-emitting light-receiving element pair (533 (54)), which is set to a rinse water path length longer than the rinse water path length of the first light-emitting light-receiving element pair. In order to always keep the output of the light receiving elements forming the light receiving element pair (51) (52) constant, the amount of light emitted by the light emitting elements forming the first light emitting/receiving element pair (51) (52) is controlled, and the above-mentioned means for controlling the amount of light emitted by the light emitting elements constituting the second light emitting and receiving element pair (53) (54) in proportion to the amount of light emitting from the light emitting element; There is a rinsing detection device characterized by comprising means for outputting the light receiving element output of ) as a turbidity signal of the rinsing water.

That is, it is a device that detects the turbidity of rinse water using a combination of a light emitting element and a light receiving element.

However, since this device is installed inside the washing tank, laundry and water flow get in the way, making identification difficult.

Moreover, when used for a long period of time, the optical surface becomes contaminated and the sensitivity deteriorates. In addition, there is a means for detecting by sampling, but the device becomes complicated.

P-4 OBJECTS OF THE INVENTION The overall purpose of the present invention is to easily detect turbidity in rinse water, promote automation of a washing machine, and save water.

1) Structure of the Invention The present invention is applied outside the machine frame! ? An inner tank with dehydration holes is installed around the outer tank, and washing ylf is carried out in this inner tank.
In the case where the FI is carried out, an ultrasonic transmitter and a receiver for receiving the sound waves from the transmitter are provided between the outer layer and the inner tank, and the transmitter and receiver are located below the water surface. This is a washing machine with special features.

That is, the sound waves emitted from the transmitter are received while being influenced by dirt, bubbles, etc. floating in the water.

In other words, the strength of the received signal changes depending on the turbidity of the water.
By fully detecting the strength of the signal, the turbidity of water can be detected fully automatically, promoting automation of washing machines and eliminating wasted water during rinsing.

In addition, the transmitter and the receiver only need to be installed between the outer tank and the inner tank, which makes the installation easy and prevents laundry etc. from getting in the way of detection.

(e) Examples Practical examples of the present invention will be explained based on the respective drawings.

In Figure 1 (aJ and (b)), (11 is the machine frame of the washing machine, and the washing outside is 12 + i inside. This outer tank (
21 has a dewatering hole (3) in the inner tank, and a rotary blade (4) is fully supported at the bottom of this inner tank. 4) Motor that rotates fully and also rotates the inner tank (31) during dehydration, 16
; is the supply YR pipe, (7) is the air trap, and (8) is the drain hose.

The outer surface 112+'i is partially recessed, and an ultrasonic transmitter (9) and an ultrasonic receiver 110I are attached to the bottom thereof, respectively, with the transmitting and receiving surface 111 (121 facing the water surface H). These transmitter (9) and receiver 1m are located below the lowest water level during washing.

Next, in Figure 2, the high-wavelength oscillator (4 from I31)
0Kl (control pulse oscillator a41 on the af wave of z
The transmission circuit 051 transmits a signal from the complete transmitter (9) toward the sword surface H while controlling the vc area time. Then, the transmitted chokane is reflected on the water surface H and received by the receiver (101).Then, the received signal is transmitted to the receiving circuit [IGlt
It is detected as an output voltage from the ji&L detection/integration circuit +i71.F181 is a control circuit that controls the washing machine based on the magnitude of this output voltage.

Now, in Figure 3 (a) and (b), there is a ``fC''
The changes in the output voltage during the complete "mesu-chogi" are shown, and the explanation will be based on this.

First, in FIG. 3 (&), at the initial stage of water rinsing, detergent containing dirt that had soaked into the laundry is scattered in large numbers into the water along with bubbles. Therefore, the transmitted ultrasonic wave is obstructed in its path by these bubbles, and the ultrasonic wave is weakened by the time it is received, and the output voltage is detected to be low (period A4 in the figure). After a while, the number of bubbles scattered in the water gradually decreases, and the output voltage also increases (period A2 in the figure). A3 period J, this time is detected as the completion of water injection QNext, in the case of pre-rinsing (tb) in Figure 6, the output voltage shows the lowest level immediately after the start due to the foam caused by the detergent (period B4 in the figure). Then, after draining and dewatering (period C in the figure λ, water is supplied, and after water supply is finished, a second rinse is performed (
82 periods in the figure. As this C1B2 period is repeated, the amount of detergent that has soaked into the laundry gradually decreases, and the output voltage also increases (83, B4...4 in the figure.Then, the output voltage during rinsing is the same as the previous one. When the amount no longer increases compared to when rinsing, it is determined that rinsing is complete.

In this example, we detected the turbidity of the rinse water, that is, the rinsing disk, but it can also be applied to water level detection, for example, by measuring the time it takes for an emitted ultrasonic wave to be reflected on the water surface H and received. . In other words, the higher the water level, the longer the time from transmission to reception.

In addition, regarding the turbidity of the rinse water, there is no need to reflect it on the water surface H, and the essence is to receive the transmitted ultrasonic waves from a transmitter (91 and receiver 101 combined with 01) underwater. It is sufficient if the signal can be received through water.

(f) Effects of the invention In the invention, the sound waves emitted from the transmitter are received while being affected by floating dirt, bubbles, etc. In other words, the strength of the received signal changes depending on the turbidity of the water, so by detecting the strength of the signal, the turbidity of the water can be detected completely automatically, which promotes the automation of cleaning Waste of water during rinsing can be eliminated.

Furthermore, the transmitter and receiver need only be installed between the outer tank and the inside, which makes installation easy and does not interfere with detection due to laundry or the like.

[Brief explanation of the drawing]

FIG. 1(a) is a cross-sectional view of the washing machine according to the present invention, and FIG.
b) A plan view of the ri outer layer and V'3 beak, Fig. 2 is a diagram of the principle of turbidity detection, Fig. 3 (il) is a diagram of output characteristics versus time during water injection rinsing, and Fig. 3 (b) is a diagram of output characteristics versus time during water injection rinsing. , Figure 4 shows the principle of O turbidity detection in the conventional example. +11...Machine frame, (21...Outside 1) Cao, (:(1...
Internal information, 131... Dehydration hole, (91... Ultrasonic transmitter, +1111... Ultrasonic receiver. 8 Figure 3 (b Figure 4)

Claims (1)

[Claims] 111 In the case where an outer tank is installed inside the machine frame, and this outer tank has a dehydration hole around the inner HLlc-inner tank, and all washing is performed within this inner tank, there is a space between the outer tank and the inner tank. A washing machine 0 characterized in that it is provided with an ultrasonic transmitter and a receiver that receives sound waves from the transmitter, and the transmitter and receiver are provided below the water surface.