JP2532580B2 - Clothes dryer control device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clothes dryer control device having a clothes storage lid on an outer peripheral surface of a drum for storing clothes.

2. Description of the Related Art As shown in FIG. 3, when the drum 8 is set to be stopped by the input section 2, the operation control section 4 turns off the heat source 7 and the conventional drum control apparatus for the clothes dryer has a configuration. ,
The motor drive unit 6 performs the waveform control as shown in FIG. 4 to rotate the drum 8 at a low speed, and the rotation position detection means 5 of the drum 8 causes the motor 13 to operate when the drum lid 9 reaches a predetermined position. While stopping, the indicator light of the display means 1 was turned on to inform the user that the drum 8 reached the predetermined position. This drum 8 rotates in the horizontal direction, and a drum lid 9 for putting clothes in and out is provided on the outer periphery of the drum 8. Therefore, when the drum 8 is stopped at a predetermined position and the drum lid 9 is opened, the clothes can be securely made. I can take it out.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In such a conventional drum controller for a clothes dryer,
As shown in FIG. 4, since the motor 13 is controlled by cutting the waveform to achieve low-speed rotation, the torque of the motor 13 increases when the amount of clothes increases or when the voltage applied to the motor 13 decreases. However, there is a problem in that the drum 8 does not move during low speed rotation, the drum lid 9 does not stop at a predetermined position, and it is difficult to take out the clothes.

Further, even if the drum lid 9 is stopped at a predetermined position, the user only has an indicator light to inform the user that it is difficult for the user to confirm the stopped state.

In view of the above problems, the present invention has an object to stop the drum lid at a predetermined position even when the torque of the motor is weak.

Means for Solving the Problems Means of the present invention for achieving the above-mentioned object, a drum having an opening for putting clothes in and out on an outer peripheral surface, a rotational position detecting means for detecting a rotational position of the drum, and a drum are provided. A motor for driving, a motor drive unit for controlling the drive of the motor, and an operation control unit for inputting a signal from the position detection means and controlling the motor drive, the operation control unit is provided with a stop signal from the input unit. When a signal is received from the position detection means, the motor is turned off for a predetermined time, and then the motor ON time is increased stepwise until the next signal is input from the position detection means. Then, the motor is stopped when the next signal from the position detecting means is input.

By the above means, when the cloth amount of clothes is small, the motor is stopped immediately before the intermittent operation, the drive is started from the initial point of the intermittent operation, and when the cloth amount is large, before the intermittent operation. Even if the motor is stopped, inertial force works, so
Although the drum stops at the position where the drum has rotated considerably, the drive is not performed until the ON time of the motor becomes long due to the intermittent operation. Therefore, both kinetic energies at the time when the motor is stopped by the next input from the position detecting means are almost the same, and the motor is stopped at a substantially fixed position.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the clothes dryer drum control device according to this embodiment, the power supply unit 3 supplies power to the operation control unit 4, the motor 13, and the heat source 7. While the drum 8 is rotating, the proximity switch 10, the magnet 11 and the rotational position detecting means 5 input a predetermined position detection signal to the operation control section 4 every time the drum lid 9 passes a predetermined position. Here, when the stop of the drum 8 is set by the input unit 2, the operation control unit 4 turns off the heat source 7, and the motor drive unit 6 makes the second
By controlling the motor 13 as shown in the figure, the drum 8 is controlled via the belt 12. FIG. 2A shows a predetermined position detection signal, and an ON signal is input to the operation control unit 4 every time the drum lid 9 passes the predetermined position. (B) is the motor 13 ON
When the predetermined position detection signal of (a) is turned on after the stop of the drum 8 is set by the input unit 2 by the OFF control signal,
0.2 seconds later, the motor 13 is turned off for 2 seconds. This 2
During the pause for 2 seconds, the drum 8 which has been rotated by inertial force is almost stopped. Next, the motor 13 OFF time 0.4 seconds, ON time 0.1 seconds,
Intermittent operation consisting of 0.2 seconds, ..., 1 second, 2 seconds, 3 seconds, 5 seconds ... is performed. For example, when the amount of clothes is small, in the intermittent operation of the motor 13, when the ON time is short, the drum 8 starts to rotate, and when the drum lid 9 reaches the predetermined position again, the predetermined position detection signal turns ON and the motor 13 Is turned off, and the drum lid 9 stops at a predetermined position. Further, the sounding means 14 is operated for a predetermined time, and the indicator light of the display means 1 is changed from lighting to blinking so that the user can be clearly notified of the stop. When the amount of clothes is large, in the intermittent operation of the motor 13, the ON time becomes long and the drum 8 starts to rotate. Similarly, the drum lid 9 stops at a predetermined position. As described above, the ON operation is performed during intermittent operation of the motor 13 against changes in load such as the amount of clothes.
Since the time takes an appropriate value, vibration and noise are small in the low speed rotation due to the intermittent operation, and the drum lid 9 can be accurately stopped at the predetermined position. In particular, even when the voltage applied to the motor 13 is reduced or even when the amount of clothes is above the rated value, the ON time in the intermittent operation of the motor 13 becomes long, and it becomes almost continuous ON in normal rotation.
It is possible to prevent the drum 8 from stopping at a position other than the predetermined position.

Although the proximity switch 10 and the magnet 11 are used for detecting the rotational position in this embodiment, they may be a hall element and a magnet, or a light emitting component and a light receiving component.

EFFECTS OF THE INVENTION As is apparent from the following embodiments, according to the present invention, even if the load such as the amount of clothes changes, the motor is rotated at a low speed for stopping the drum lid at a predetermined position for a certain period of time. Since the operation is performed by the intermittent operation of turning off the motor and turning on the motor, the drum does not stop in the middle of low speed rotation, and vibration and noise during low speed rotation are small, and the drum lid can be stopped at a predetermined position. Moreover, since the user is notified of the stop by the sounding means, the user can clearly confirm the state.

[Brief description of drawings]

FIG. 1 is a block diagram showing a control device for a clothes dryer in an embodiment of the present invention, and FIG. 2 is a time chart of a predetermined position detection signal and a motor ON / OFF control signal for stopping a predetermined position of a drum lid, FIG. 3 is a block diagram showing a control device of a conventional clothes dryer, and FIG. 4 is a motor voltage waveform diagram in drum control of the conventional clothes dryer. 1 ... Display means, 2 ... Input section, 3 ... Power supply section, 4 ...
Operation control section, 5 ... Rotational position detecting means, 6 ... Motor drive section, 7 ... Heat source, 8 ... Drum, 9 ... Drum lid, 10
...... Proximity switch, 11 ...... Magnet, 12 ...... Belt, 13 ......
Motor, 14 …… Sounding means.

Claims (1)

(57) [Claims] 1. A drum having an opening for putting clothes in and out on an outer peripheral surface, a rotational position detecting means for detecting a rotational position of the drum, a motor for driving the drum, and a motor driving portion for controlling the driving of the motor. And a motion control unit for inputting a signal from the position detection unit and controlling the motor drive. The motion control unit detects the signal from the position detection unit when a stop signal is received from the input unit. Turn off the motor for a predetermined time
After that, until the next signal is input from the position detection means,
A control device for a clothes dryer that performs intermittent intermittent operation while gradually increasing the ON time of the motor and stops the motor when the next signal from the position detection means is input.