JPS6137289A - Operation of automatic washing machine - 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 (a) Field of Industrial Application The present invention relates to an operating method for smoothly progressing each stroke of an automatic washing machine.

(B) Conventional technology A general automatic washing machine sequentially executes a washing process, two rinsing processes, and a dehydration process. Then, after the washing process and after the first rinsing process, an intermediate dehydration process is performed to increase the effectiveness of subsequent rinsing.

Note that this intermediate dehydration step is sometimes explained as being incorporated into the first and second rinsing steps. During this intermediate spin-drying process, if abnormal vibrations occur due to unevenness of the laundry, this is detected by a lever, etc., and a safety switch is activated (or de-activated) to interrupt the spin-drying operation. As shown in Japanese Patent Publication No. 57-39889, water is supplied, the rotor is rotated to correct the imbalance, and dehydration is restarted.If abnormal vibration still occurs and the dehydration is interrupted,
If a return operation is required and the return operation is not performed, the stopped state is maintained or the power supply circuit is cut off.

When a user starts washing, he or she often leaves to do other household chores or the like, and may not notice abnormal vibrations even if they are detected and notified by a buzzer or the like. Therefore, when the user returns after a predetermined period of time, the rinsing may not have been completed yet, and the household chores, etc., scheduled for the next day may be missed.

(c) Problems to be Solved by the Invention The present invention is characterized in that the operation progresses smoothly when abnormal vibrations occur and that the rinsing effect is ensured.

B) Means for Solving the Problems According to the present invention, when abnormal vibration occurs during the intermediate dehydration process, the intermediate dehydration process is stopped and replaced with another over-process.

It is possible to continue the operation as it is, and the operation proceeds smoothly despite the occurrence of abnormal vibrations. Furthermore, by performing rinsing instead of intermediate dehydration, a rinsing effect equivalent to that achieved by intermediate dehydration is ensured.

(f) Example Embodiments of the present invention will be described based on the drawings.

(1) is a frame on which the outer tank (2) is suspended in a vibration-proof manner;
) is a dewatering/washing tub rotatably arranged in the outer tub (2), (4)... is a dehydrating hole drilled in the peripheral wall of the washing tub (3), (5) is a balance ring, (6) is a large-diameter mountain-shaped rotary blade rotatably disposed at the center of the bottom of the washing tub (3). The outer bottom surface of the outer tank (2) is provided with the rotor blade (6).
A drive motor (7) and a bearing case (8) are provided to intermittently reverse the rotation at a low speed (approximately 18 Or, p, m) and simultaneously rotate the rotary blade (6) and washing tub (3) in one direction at high speed. It is. In addition, a drain port (9) for the washing tub (3) is provided on the bottom of the outer tank (2), and this drain port (9) is connected to the drain valve (1).
0) and a bellows-shaped drainage hose (2) which can be freely raised and lowered through a drainage channel (11). u9 is a solenoid that opens the drain valve aO) when energized, and operates a clutch device (not shown) when energized to control the rotation of the drive motor (7) H (6) and the washing tub (3). At the same time, the brake device (not shown) of the washing tub (3) is released. (
Reference numeral 141 denotes an overflow port provided in the outer wall i [2), which communicates with the drainage channel Ol via an overflow hose (2).

(16) is an upper lid that covers the upper opening of the washing tub (3);
η is a water supply port connected to the water supply channel via an electromagnetic water supply valve.

(19) is a control box, which is equipped with a control circuit shown in Figure 2, which is connected to a microcomputer (hereinafter referred to as microcomputer) as a control means, various output means, and various input (setting) means; The front panel has a power switch knob (21) for operating the input (setting) means, a knob (support) for setting the water level, a key inside for changing strokes, etc., a start key (foundation), etc. A light emitting diode (hereinafter referred to as LED) (a) is provided within the stop key to serve as an operation display or status notification means.

Detection signal of the liquid level switch (8) that detects the set water level of the washing tub (3), detection signal of the safety switch (support) that is linked to the opening and closing of the top cover (1e) and detects abnormal vibrations during spin-drying, and reset. The reset signal for the circuit (a) is from the microcomputer■
is input. □□□ is a drive circuit for rotating the drive motor (7) clockwise, (9) is a drive circuit for rotating it counterclockwise, and □□□ is a buzzer as a notification means to notify the user of various conditions. be. The operating mechanism of the safety switch (support) is located in the lower part of the control box 0 (g) and in the frame (1), and opens when the top cover (16) is opened or closed. The machine will be automatically operated according to the operating schedule diagram in Figure 3. That is, normally, after water is supplied and a washing process is performed, water is drained to perform intermediate dewatering. and,
Water is supplied, a first water rinse is performed, and the water is drained, and then a second intermediate dehydration is performed. Furthermore, water is supplied, a second water rinse is performed, and the water is drained to proceed to the final dewatering process. During the washing and rinsing processes, the left and right drive circuits (I and C11l) of the motor (7) are intermittently energized to generate a reverse water flow.The water supply valve is opened during water supply and water injection rinsing, and the solenoid (13) is opened during water drainage. ) is energized to open the drain valve (lot), operate the clutch device, and release the brake device.In each dehydration stroke, the clockwise rotation drive circuit field of the motor (7) is activated with the solenoid (13) energized. is energized to simultaneously rotate the rotor blade (6) and the washing tub (3) at high speed.

During this automatic operation, it is detected whether or not the outer tub (21) vibrates more than a predetermined level due to the unevenness of the laundry during the first and second intermediate spin-drying steps and the final spin-drying step. Safety switch (support) turns off instantly
It detects whether or not it is allowed. If the safety switch rut is continuously turned on, normal operation will proceed.

Here, the safety switch track turns OFF instantly due to abnormal vibration.
F, the dehydration process is stopped. That is, motor (7)
stops, solenoid 03) becomes de-energized and closes the drain valve head. This is a state of drainage.

In the case of first and second intermediate dehydration, this process is converted into a pre-rinsing process. In other words, supply water and store water;
Creates a reverse water flow and drains water. After this drainage, the water supply continues before the first or second water pouring rinse. If it is the final dehydration process, the buzzer ■ will sound intermittently for a predetermined period of time after it is stopped.

By this abnormality notification, if the user returns and restarts the dewatering process after eliminating the unevenness, the entire process will be completed in a maximum of 5 minutes, and there will be no need to say that washing cannot be done due to abnormal vibrations.

Since the rinsing step replaces the intermediate dehydration step, the rinsing step has the same rinsing effect as when the washing water is shaken off by the intermediate dehydration. Also, the time is set so that this happens. The times for the first pre-rinsing and the second pre-rinsing may be varied in advance depending on the degree of rinsing.

(G) Effects of the Invention According to the present invention, even if abnormal vibration occurs, the operation can proceed automatically while ensuring the same rinsing effect as intermediate dehydration, and by improving the automation rate, the user can enjoy exceptional benefits. We can provide driving methods that bring benefits.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of an automatic washing machine according to the present invention, FIG. 2 is a block diagram of a control circuit, and FIG. 3 is a flowchart showing an operating process. @)...Microcomputer, (support)...Safety switch.

Claims (1)

[Claims] (1) In an automatic washing machine that automatically performs washing, rinsing, and intermediate dehydration steps in a predetermined order while supplying and draining water as appropriate before the final dehydration step, abnormal vibrations were detected during the intermediate dehydration step. A method for operating an automatic washing machine characterized by stopping this intermediate dehydration process and converting it to a new rinsing process at times.