JPS61191392A - Stirring type 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] [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. And special exhibition 5
As shown in Japanese Patent No. 9-151988 and others, there is one that includes a rotation angle detection section that detects the rotation angle of the agitator, and a control section that controls the motor based on a detection signal from the rotation angle detection section.

This is because the control unit is composed of an arithmetic processing unit, memory, etc., and sets two types of rotation angles of the agitator during no-load operation and load operation, and sets the rotation angle of the agitator in two types, based on the angle signal detected by the rotation angle detector. The setting angle is automatically switched between no load and load, and the rotation angle of the agitator is 360°.
We did the following to prevent people's hands from getting caught, and also 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 is large, and when the amount to be washed is large, the rotation angle is decreased, and the reciprocating time of the agitator is adjusted depending on the amount to be washed. It is possible to automatically set the optimum number of reciprocations of the agitator depending on the amount of washing to be changed.

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 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. I try to set the selection, but I have to accurately measure the amount of items to be washed each time I wash them.
The reality is that measurement is done visually because it is troublesome, but this eliminates the disadvantage of not being able to fully demonstrate the performance of the washing machine, improves usability, and at the same time, when there is no water in the washing tank. It is possible to improve safety by preventing the agitator from rotating several times during so-called no-load conditions and the risk of human hands being caught.

[Problem that the invention seeks to solve]

The rotation angle detector is disclosed in Japanese Patent Publication <59-151
In No. 988, a detection hole is provided at a predetermined angle on a pulley for rotation transmission, and a light emitting part is installed on the upper side and a light receiving part on the lower side near the outer periphery of this pulley. Section (9) was formed into a U-shape and consisted of an angle detector so that the light receiving section corresponded thereto.

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

By the way, the rotation (angle) detector serving as a clothing sensor for detecting the presence and amount of items to be washed has a structure that does not interfere with normal operation even if it breaks down from the standpoint of washing operation. Therefore, it is difficult to detect a malfunction, 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.

SUMMARY OF THE INVENTION An object of the present invention is to provide an agitation type washing machine which eliminates the disadvantages of the conventional example and allows easy detection of failure of a rotation detector as a clothing sensor.

[Means for solving problems]

In order to achieve the above object, the present invention provides a special agitation washing machine equipped with a rotation detector for an agitator or its driving motor, and a control device for controlling the motor based on a detection signal from the rotation detector. The gist is that the motor is operated according to a command, and a means for diagnosing whether or not the rotation detector is operating normally is provided in the control device based on the output of the rotation detector based on the command. be.

[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;
The figure is a flowchart, and an example of a washing machine is a stirring type fully automatic washing machine.

In the figure, (1) is an agitator that has a hollow cylindrical body at its center and vertically long stirring blades (2) are provided radially around its circumferential surface. (5
), and a balancer (6) using a hollow transport body is formed in the upper opening of the dehydration tank.

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

In the figure, (8) is a motor, which is connected to a rotation transmission section (12) via a deceleration transmission mechanism of a pulley (9), a belt (10), and a pulley (11). This rotation transmission section (12) has a double drive shaft (12a) (12b) that is switched by a spring clutch mechanism (13),
The outer drive shaft (12a) is coupled to the dehydration tank (4), and the inner drive shaft (12b) is coupled to the agitator (1).

The motor (8) is equipped with a rotation detector (
14) is installed. As this rotation detector (14), a speed generator using a power generation mechanism was used.

Although not shown, all of these mechanisms are housed inside the exterior via vibration isolating means, and the upper part of this exterior includes a control device (17) using a microcomputer and an operation switch (18a).
An operation panel (19) containing .about.(18f) is provided.

The control device (17) includes the rotation detector (1).
4), outputs from detectors for water level detection, etc., and each operation switch (18a) to (1) on the operation panel (19).
8f) is introduced, and is also introduced into the energization control circuit of the output motor (8) from the control device (17).

The control device (17) is composed of a memory, an arithmetic processing unit, a comparator input control, and an output control, and a power source is connected to the control device (17) via a power switch. And a rotation detector (
The power generation output from 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, in the memory, when the control device (17) issues a control signal to the motor (8) via the output control, the rotation value to be received by the input from the rotation detector (14) is preset according to the content of the control signal. The comparator serves to compare this set value with the actual measured calculated value.

In this way, you can input operation switches that are impossible depending on the usage, for example, the operation switch (18C) that selects the standard course of the wash program (18C) and the operation switch (18d) that selects the light dirt course on the operation panel (19). If they are pressed simultaneously, this will enter the control device (17) and a diagnostic program will be selected.

As a result, the control device (17) rotates the motor (8), and the rotation detector (14) sends a measured value of the rotation speed according to the content of the control output to the motor (8) produced by the control device (17). The rotation detector (1
4) Diagnose whether or not it 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 (14)
17) determines that the detector (14) is malfunctioning, changes the control details for the motor (8), and operates it continuously. Therefore, the agitator (1), which had been swinging until then, rotates continuously in only one direction, so the user uses the rotation detector (14)
You can learn about abnormalities.

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

〔Effect of the invention〕

As described above, the agitating type washing machine of the present invention is equipped with a rotation detector for an agitator or its driving motor, and a control device for controlling 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 the drawing]

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 blade (
4)...Tax tank (5)...Through hole (6)...
・Balancer (7)...Water tank (8)...Motor (9) (11)...Pulley (10)...V-belt (12)...Rotation transmission part (12a) (12b) -...Drive shaft (13)...
・Spring clutch mechanism (14)...Rotation detector (15)...Drain port (
16)...Drain valve (17)...Control device (
18a) - (18f)... Operation switch (19)...
・Operation panel agent Patent attorney Masuo Oon Figure 1] 9 Figure 2 1, case display 1985 Patent order No. 31738 1
, title of invention agitator 3, person making amendment
Relationship with 1 case Patent applicant address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Representative of Mitsubishi Electric Corporation Relationship with Moriya Shiki case Patent applicant address Otemachi, Chiyoda-ku, Tokyo 2-6-2 Name (442) Nippon Kentetsu Co., Ltd. Representative Minami Nitatsu Department Agent Address 100 Address 2-2-3-i, Kunouchi, Chiyoda-ku, Tokyo Date of amendment order Self-initiated ;, Number of inventions increased by amendment None r, Detailed explanation of the invention in the specification subject to amendment. 1. Contents of the amendment (1) In the 20th line of page 1 of the specification, the phrase “Special Publication” has been changed to “
Tokukai Akira,” he corrected. (2) On page 3, line 18 of the same book, the phrase “Special Publication” is replaced with “
Tokukai Akira,” he corrected.

Claims (1)

[Claims] 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, the motor is operated according to a special command, and the motor is operated based on the rotation detector. 1. An agitating type washing machine, characterized in that a control device is provided with a means for diagnosing whether or not the rotation detector is operating normally based on the output of the rotation detector.