JPH0244237B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a stirring type washing machine.

[Conventional technology]

As is well known, a stirring type washing machine performs washing by alternately rotating an agitator in a tank in forward and reverse directions by driving a washing drive motor in forward and reverse directions. As shown in Japanese Unexamined Patent Publication No. 59-151988 and others, it is equipped with a rotation angle detection section that detects the rotation angle of the agitator, and a control section that controls the motor based on the detection signal of the rotation angle detection section. There is.

This is because the control section is composed of an arithmetic processing unit, a memory, etc., and sets two types of rotation angles of the agitator during no-load operation and during load operation.
Based on the angle signal detected by the rotation angle detector, the set angle is automatically switched between no-load and load conditions, so that the rotation angle of the agitator is less than 360 degrees, so that human hands, etc., will not get caught. In addition, we focused on the fact that the amount of movement of the agitator, which moves by inertia after the motor is de-energized, is approximately proportional to the amount of items to be washed. When the amount to be washed is small, the rotation angle of the agitator, which moves by inertia, is large. When the amount to be washed is large, the rotation angle is decreased, and the reciprocating time of the agitator is changed depending on the amount to be washed, so that the optimal number of reciprocations of the agitator is determined depending on the amount to be washed. This allows the settings to be set automatically.

Note that the rotation angle may be detected by the motor instead of the agitator, and the inertia may be detected by the inertial rotation of the motor.

Conventionally, by performing the above-mentioned operation control, in order to prevent damage to the fabric of the items to be washed, multiple water flows are predetermined according to the amount of items to be washed, and each time the user uses a push button switch, etc. Although I try to set the selection, I have to accurately measure the amount of items to be washed each time I wash them, which is a hassle, so I have to measure them visually. This eliminates the disadvantage of not being able to clean the water and improves usability, and at the same time prevents the agitator from rotating several times during so-called no-load conditions when there is no water in the washing tank, causing the risk of human hands being caught. It can be prevented and safety can be increased.

[Problem that the invention seeks to solve]

The rotation angle detector is disclosed in Japanese Patent Application Laid-open No. 59-
In Japanese Patent No. 151988, a detection hole is provided at a predetermined angle on a rotation transmission pulley, and near the outer periphery of this pulley, a light emitting part is attached to the upper side and a light receiving part is attached to the lower side. An angle detector was used, which was formed into a U-shape so that the light emitting part 9 and the light receiving part corresponded to each other.

In addition to this, for example, it is also possible to attach a speed generator to the motor and use this as a rotation detector.

Incidentally, the rotation (angle) detector serving as a clothing sensor for detecting the presence and quantity of items to be washed is configured so that normal operation will not be affected even if the rotation (angle) detector malfunctions from the standpoint of washing operation. Therefore, it is difficult to detect a failure, and if the system is used for a long period of time, the necessary operational control may not be performed or may become erroneous, leading to an accident.

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
To provide an agitation type washer that can easily detect failure of a rotation detector as a clothing sensor.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides an agitator-type washing machine that is equipped with a rotation detector for an agitator or its driving motor, and a control device that controls the motor based on a detection signal from the rotation detector. The control device operates the motor according to a special command generated by a combination of operation switches that cannot be used, and uses the output of the rotation detector based on this command to diagnose whether or not the detector is operating normally. The main points of this document are as follows.

[Effect]

According to the present invention, the control device automatically determines whether the rotation angle detector operates correctly according to the operation of the motor driven for testing, and as a result, accurate and quick diagnosis can be obtained. .

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an explanatory diagram showing an embodiment of the washing machine of the present invention, and FIG. 2 is a flowchart showing an example of a washing machine using a stirring type fully automatic washing machine.

In the figure, 1 is an agitator that has a hollow cylindrical body in the center and vertically long agitating blades 2 are provided radially around its circumferential surface;
A balancer 6 using a hollow wheel is formed in the upper opening of the dehydration tank.

A water receiving tank 7 is provided outside the dewatering tank 4, and is provided with a drain port 15 to which a drain pipe having a drain valve 16 is connected.

In the figure, reference numeral 8 denotes a motor, which is connected to the rotation transmission section 12 via a deceleration transmission mechanism of a pulley 9, a V-belt 10, and a pulley 11. The rotation transmitting section 12 has double drive shafts 12a and 12b that are switched by a spring clutch mechanism 13, and the outer drive shaft 12a is connected to the dehydration tank 4, and the inner drive shaft 12b
are respectively coupled to an agitator 1.

A rotation detector 14 is attached to the motor 8 to detect its rotation speed. As this rotation detector 14, a speed generator using a power generation mechanism was used.

Although not shown in the drawings, all of these mechanisms are housed inside the exterior via vibration isolating means, and an operation panel 19 containing a control device 17 using a microcomputer and operation switches 18a to 18f is mounted on the upper part of the exterior. provided.

The control device 17 includes outputs from the rotation detector 14 as well as other detectors such as water level detectors, and each operation switch 18a of the operation panel 19.
The output of ~18f, etc. is introduced, and is also introduced into the energization control circuit of the output motor 8 from the control device control device 17.

The control device 17 is composed of a memory, an arithmetic processing unit, a comparator input control, and an output control.
A power supply is connected to the unit via a power switch. The power generation output from the rotation detector 14 is input to the control processing device 17 via the input control, and the rotation speed is calculated by the memory and the arithmetic processing device. On the other hand, when the control device 17 issues a control signal to the motor 8 via the output control, the rotation value that should be received as an input from the rotation detector 14 is preset and stored in the memory according to the content of the control signal, and is used for comparison. The function of the device is to compare this set value with the actual measured value.

In this way, if you press the operation switch 18c, which selects the standard course of the program to be washed, and the operation switch 18d, which selects the light dirt course, at the same time on the operation panel 19, which would not be possible in normal usage, , this enters the control device 17 and a diagnostic program is selected.

As a result, the control device 17 issues a special command to rotate the motor 8 based on the input of the operation switch that cannot occur in normal usage, but the control device 17 rotates the motor 8 in accordance with the content of the control output to the motor 8 issued by itself. It is determined whether or not a measured value of the number is sent from the rotation detector 14, thereby diagnosing whether or not the rotation detector 14 is operating normally.

If the rotation detector 14 fails and there is no measurement output, or if there is an abnormal output,
The control device 17 determines that the detector 14 is malfunctioning, changes the control details for the motor 8, and continuously operates the motor 8. Therefore, since the agitator 1, which had been swinging until then, rotates continuously in only one direction, the user can know if the rotation detector 14 is abnormal.

On the other hand, when the rotation detector 14 operates normally, the motor 8 continues normal forward and reverse operation (step), and the agitator 1 continues to swing.

〔Effect of the invention〕

As described above, the agitation type washing machine of the present invention is an agitation type washing machine equipped with a rotation detector for an agitator or its driving motor, and a control device that controls the motor based on a detection signal from the rotation detector. , it is possible to easily diagnose whether or not the rotation detector is operating normally, thereby easily finding a malfunction in the rotation detector and preventing the occurrence of an accident.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the agitating type washing machine of the present invention, and FIG. 2 is a flowchart showing the same operation. 1... Agitator, 2... Stirring wing, 4...
Dehydration tank, 5... Through hole, 6... Balancer, 7...
Water tank, 8...Motor, 9, 11...Pulley, 10...V belt, 12...Rotation transmission unit, 1
2a, 12b... Drive shaft, 13... Spring clutch mechanism, 14... Rotation detector, 15... Drain port, 1
6...Drain valve, 17...Control device, 18a-18
f...Operation switch, 19...Operation panel.

Claims (1)

[Claims] 1. In an agitator washing machine equipped with a rotation detector for an agitator or its drive motor, and a control device that controls the motor based on a detection signal from the rotation detector, this occurs due to an unusual combination of operation switches. The control device is characterized by having a means for diagnosing whether or not the rotation detector is operating normally based on the output of the rotation detector based on the output of the rotation detector, which operates the motor according to a special command. Stirring type washing machine.