JPH0330800A - Controller of clothing-drying machine - Google Patents

Abstract

PURPOSE:To stop a drum cover always exactly at a specified position by controlling a motor driving section with a working controlling section, to reverse-drive a motor plural times, every time the falling edge of signal from a rotating position detecting means is detected, and by detecting the rising edge of rotating position detecting signal, to turn OFF the motor. CONSTITUTION:When a drum 6 is rotated, then by a near switch, a magnet 9, and a rotating position detecting means 4, every time a drum cover 7 passes a specified position, the input of specified position detecting signal to a working controlling section 3 is provided. When the stopping of the drum 6 is set by an input section 1, then by the working controlling section 3, a motor 11 is controlled through a motor driving section 5, and via a belt 10, the drum 6 is controlled. Every time the specified position detecting signal is turned ON, the motor 11 is reverse-driven by the working controlling section 3 through the motor driving section 5, and forward rotation and reverse rotation are repeated, and the drum cover 7 is converged at the specified position. When it is stopped at the final specified position, then the change of the specified position detecting signal from OFF to ON is detected, and the motor 11 is turned OFF, and the drum cover 7 is stopped at the specified position.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device for a clothes dryer that has a lid for throwing in clothes on the outer peripheral surface of a drum for storing clothes.

2. Description of the Related Art As shown in FIG. 1, the configuration of a conventional drum control device for a clothes dryer is such that when an input section 1 is set to stop a citram 6, an operation control section 3 receives a signal from a rotational position detection means 4. Figure 3a
A rotational position detection signal is input as shown in , and every time a rising edge of this rotational position detection signal is input, the motor drive unit 5 reverses the energization control for forward rotation shown by blc and reverse rotation shown by C. The drums are rotated at a low speed while rotating, and after several reversals, the rising edge of the output of the rotational position detection means 4 is input, and it is determined that the drum lid 7 provided on the outer periphery of the drum 6 has reached a predetermined position. It was detected and the motor 11 was stopped.

Problems to be Solved by the Invention In such a conventional drum control device for a clothes dryer, the motor 11 is immediately reversed and driven at the rising edge of the rotational position detection signal. If the speed of the drum 6 at the time of reversal is very slow due to conditions such as the applied voltage, the magnet 9 will reverse before it passes the position of the nearby switch 8 and the drum 6 will rotate, so the magnet 9 will be detected again. , the drum 6 rotates once,
Therefore, there were problems in that it took a long time to reach the predetermined position and the accuracy of the stopping position deteriorated.

In view of the above problems, it is an object of the present invention to always accurately stop a drum lid at a predetermined position in a short time regardless of conditions such as clothing or voltage.

Means for Solving the Problems In order to achieve the above objects, the present invention provides a drum that rotates around a horizontal direction, a drum lid provided on a part of the outer peripheral surface of the drum for loading and unloading clothes, and a rotational position detection means for detecting the rotational position of the drum; an operation control section that receives the rotational position detection means as an input; a motor that drives the drum; and a motor drive section that controls the drive of the motor. The control section controls the motor drive section during the rotation stop operation of the drum, and drives the motor in reverse a plurality of times each time a falling edge of the signal from the rotational position detection means is detected, and then detects the rotational position. The apparatus is configured to detect a rising edge of the detection signal, turn the motor to 0FFj, and stop the drum lid at a predetermined position.

Further, when the motor is reversed, the motor is turned off while the input from the rotational position detection means is on.

Operation With the above structure, the drum is always driven in reverse after passing the rotation detection position, and the motor is immediately turned off when it reaches the rotation detection position at the final stop, regardless of conditions such as the amount of clothes and voltage. Therefore, the drum lid can be quickly and accurately stopped at a predetermined position. Furthermore, since the motor is not driven while the predetermined position detection signal is ON, the rotation of the drum can be brought to a converged state more quickly.

EXAMPLE Hereinafter, an example of the present invention will be explained based on FIGS. 1 and 2. The drum control device for a clothes dryer in this embodiment includes a power supply section 2, an operation control section 3. Power is supplied to the motor 11. Further, when the drum 6 is rotating, each time the drum lid 7 passes a predetermined position, a predetermined position detection signal is inputted to the operation control section 3 by the nearby switch 8, magnet 9, and rotational position detection means 4. Ru. When the stop of the drum 6 is set by the input unit 1, the operation control unit 3 controls the motor 11 by the motor drive unit 5 as shown in FIG. to control the drum 6. 2 is a predetermined position detection signal, and an ON signal is input to the operation control section 3 every time the drum lid 7 passes a predetermined position. Here, after the stop of the citram 6 is set by the input unit 1, each time the predetermined position detection signal shown in FIG.
The operation control section 3 uses the motor drive section 5 to drive the motor 11 in reverse and repeats forward and reverse rotations to converge the drum lid 7 to a predetermined position.This reversal operation is performed when the predetermined position detection signal is This is performed at the time of changing from ON to OFF, and while the predetermined position detection signal is OW, the motor 11
is OFF L, no forward or reverse rotation is performed. When stopping at the final predetermined position, the predetermined position detection signal is turned OFF.
Detecting the change from to ON, the motor 11 is turned OFF and the L drum lid 7 is stopped at a predetermined position.

In addition, during the rotation stop operation, the timer part 12 measures the ON time of the predetermined position detection signal, and if the ON time exceeds the predetermined time, the operation control part 3 causes the drum lid 7 to immediately reach the predetermined position. It is determined that the rotation stop operation is completed.

In this embodiment, the proximity switch 8 and magnet 9 are used for oral position detection, but a Hall element and a magnet, or a light-emitting component and a light-receiving component may be used.

Effects of the Invention As is clear from the above embodiments, according to the present invention, since the drum is always reversed after passing a predetermined position,
Even if the drum is rotating at such a low speed that it stops during reversal, the drum lid can be controlled to reliably approach and converge to the specified position, and can be controlled quickly regardless of conditions such as the amount of clothes or voltage. This has the effect that the drum lid can be stopped at a predetermined position with high precision.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a control device for a clothes dryer according to an embodiment of the present invention. FIG. 2 is a time chart of a predetermined position detection signal and a motor ON/OFF control signal for stopping the drum lid at a predetermined position. FIG. 3 is a time chart of a predetermined position detection signal of a conventional clothes dryer and a motor ON/OFF control signal for stopping the drum lid at a predetermined position. 1...Input section, 2...Power supply section, 3...
...Operation control unit, 4...Rotational position detection means, 5...Motor drive unit, 6...Drum, 7...Drum lid, 8... Proximity switch, 9... Magnet, 10... Belt, 1
1... Motor, 12... Part of the timer.

Claims (2)

[Claims] (1) A drum that rotates around a horizontal direction, a drum lid provided on a part of the outer peripheral surface of the drum for loading and unloading clothing, a rotational position detection means for detecting the rotational position of the drum, and a rotational position of the drum. The operation control section includes an operation control section that receives the detection means as an input, a motor that drives the drum, and a motor drive section that controls the drive of the motor. after driving the motor in reverse a plurality of times each time a falling edge of the signal from the rotational position detection means is detected.
A control device for a clothes dryer, which detects a rising edge of the rotational position detection signal, turns off the motor, and stops the drum lid at a predetermined position. (2) The control device for a clothes dryer according to claim 1, wherein the operation control section turns off the motor while the input from the rotational position detection means is on when the motor is reversed when the rotation of the drum is stopped.