JPH0435699A - Clothes drying machine - Google Patents

Abstract

PURPOSE:To realize drum specified position stop control in low noise and little vibration, in stopping a drum, by suspending the power supply to a motor after inputting a rotation position detection signal and applying electromagnetic brake to a motor after the inertia rotation of the drum subsides. CONSTITUTION:In stopping a drum 4, the power supply to a motor 3 is stopped for a specified time after inputting a rotation position detection signal. Then, the electromagnetic braking of the motor 3 is made so that the drum 4 is rotated at low speed and the motor 3 is repeatingly opened in reverse. By repeating the procedure, a drum lid 5 is stopped at a specified position.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a clothes dryer having a lid for putting in clothes on the outer peripheral surface of a drum for storing clothes.

2. Description of the Related Art The configuration of a drum fixed position control device for a conventional clothes dryer is as follows.
FIG. 4 shows a flowchart of the drum fixed position control method. When the stop of the drum 4 is set by the input unit 9 (step 1), the operation control unit 2 inputs the rotational position detection signal of the rotational position detection means 8 (step 2), and then the motor drive unit 10 immediately starts the motor. 3 electromagnetic braking (
Step 3), after rotating the drum 4 at low speed, the motor 3
By repeatedly performing reversal driving of (steps 4 to 1)
1), the drum lid 5 was stopped at a predetermined position. This drum 4 rotates in the horizontal direction, and has a drum lid 5 on its outer periphery for loading and unloading clothes, so the drum 4 is stopped at a predetermined position and when the drum lid 5 is opened, the clothes are securely removed. I make it so that I can take it out.

Problems to be Solved by the Invention In such a conventional drum fixed position control device for a clothes dryer, the operation control section 2 immediately controls the electromagnetic braking of the motor 3 by the motor drive section 10 after inputting the rotational position detection signal. However, since the drum 4 rotates at approximately the same speed as in normal operation, there was a problem in that large vibrations and noise were generated when electromagnetic braking was applied.

In view of the above problems, the present invention relates to drum fixed position control; Means for Solving the Problems To achieve this object, the drum fixed position control device for a clothes dryer of the present invention rotates around the horizontal direction. a drum, a drum lid for loading and unloading clothes provided on a part of the outer peripheral surface of the drum, a rotational position detection means for detecting a rotational position of the drum, and an operation control using the rotational position detection means as an input. a motor that drives the drum, and a motor drive unit that drives the motor, and when stopping the drum, after inputting a rotational position detection signal and after stopping energization to the motor for a certain period of time. The drum lid is configured to be stopped at a predetermined position by applying electromagnetic braking to the motor to rotate the drum at a low speed and repeatedly driving the motor in reverse.

Function: With this configuration, it is possible to reduce vibrations and noise generated during electromagnetic braking in drum fixed position control, and a sufficient braking effect can be obtained.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 shows the configuration of a drum fixed position control device for a clothes dryer according to an embodiment of the present invention, FIG. 2 shows a flowchart of a drum fixed position control method according to an embodiment of the present invention, and FIG. ON/OFF of the rotational position detection signal of the drum 4 during drum fixed position control in the embodiment
The signal waveform and the ON/OFF waveform of the motor 3 for rotating the drum 4 in forward and reverse directions are shown.

First, in FIG. 1, the power supply section 1 causes the operation control section 2 to
, power is supplied to the motor 3. Furthermore, while the drum 4 is rotating, a predetermined position detection signal is input to the operation control section 2 by the proximity switch 6, magnet 7, and rotational position detection means 8 every time the drum lid 5 passes a predetermined position. The operation control section 2 controls a reverse operation control section 2a that controls the reverse rotation direction of the motor 3, a normal rotation operation control section 2c that controls the forward rotation direction of the motor 3, and a reverse rotation operation control section 2a that controls the motor 3. It has an electromagnetic braking means for applying electromagnetic braking to 3. The motor drive section 10 is connected to a reverse rotation drive section 10b which controls the energization to the main winding side of the sleeve part 3 in response to a signal from a reverse rotation operation control means 2a of the operation control section 2, and a reverse rotation drive section 10b which controls energization to the main winding side of the sleeve part 3 based on a signal from a forward rotation operation control means 2c. The motor 3 includes a normal rotation drive section 10a that controls energization to the auxiliary windings of the motor 3. Further, the electromagnetic braking control means 2b controls the reverse rotation operation control means 2a, and controls the reverse rotation drive section 1.
0b applies electromagnetic braking by energizing the auxiliary winding of the motor 3 in short pulses.

Here, in FIGS. 2 and 3, when the stop of the drum 4 is set by the input unit 9 (step 1), it is determined whether the rotational position detection signal is turned ON or not (step 2).
, when ON is detected, the power to the motor 3 is turned off for 0.6 seconds.
FFL (Step 3): After the rotational force due to inertia of the drum 4 has weakened, the auxiliary winding of the motor 3 is energized with a 1/6 pulse cut, and electromagnetic braking is applied to the lower ram 4 in the opposite direction for 0.7 seconds. (Step 4). At this time, since the rotational speed of the drum 4 is reduced, the same effect can be obtained even if the braking time is shorter than in the past, and vibrations and noise caused by impact are also reduced. Next, the main winding No. 3 has an ON time of 0.4 seconds, an OFF time of 1.6 seconds, and an OFF time of 1.6 seconds as shown in Fig. 3 fa).
The drum 4 is rotated in the forward direction at a low speed by intermittent energization for seconds (step 5). When the rotational position detection signal turns ON as the drum lid 5 passes a predetermined position (step 6), the auxiliary winding of the motor 3 is turned ON as shown in FIG.
Time 0.5 seconds, 0.3 seconds, 0.3 seconds..., OF
Intermittent energization is performed for F time 1.6 seconds, and the drum 4 is rotated at low speed in the opposite direction (step 7). By repeatedly driving the drum 4 in forward and reverse directions while changing the 0N-OFF energization ratio of intermittent energization (step 8.9)
, step 10 in which the drum lid 5 finally reaches a predetermined position.
), further, after energizing the auxiliary winding of the motor 3 with a 1/4 pulse cut (step 11), the energization to the motor 3 is stopped (step 12), and the drum lid 5 is stopped at a predetermined position. .

As described above, after the drum 4 is set to stop and the rotational position detection signal is turned on, the power to the motor 3 is turned off, and the drum 4 is turned off.
After the rotational force due to inertia has weakened, electromagnetic braking is applied to the motor 3, so the rotational speed of the drum 4 is reduced, so even with a shorter braking time than before, there is sufficient braking effect, and there is no vibration or noise. Drum fixed position control of a clothes dryer with a small number of clothes dryers can be realized.

In this embodiment, the proximity switch 6 and magnet 7 are used to detect the rotational position, but a Hall element and a magnet, a light emitting component and a light receiving component may also be used.

Although the drum 4 is rotated at a low speed by intermittent energization of the motor 3, the drum 4 may be mechanically decelerated by a gear or the like to perform the low-speed rotation.

In addition, the present invention is not limited to the embodiments described above or shown in the drawings, and may be implemented with appropriate modifications within the scope of the gist.

Effects of the Invention As described above, when stopping the drum, the present invention stops energizing the motor for a certain period of time after inputting a rotational position detection signal, and then applies electromagnetic braking to the motor after the inertial rotation of the drum has weakened. As a result, drum fixed position control with low noise and less vibration can be realized.

[Brief explanation of drawings]

Fig. 11 is a block diagram of a clothes dryer according to an embodiment of the present invention, Fig. 2 is a flowchart showing the control procedure of the operation control section, and Fig. 3 is a flowchart showing the control procedure of the operation control section. FIG. 4 is a flowchart showing the control procedure of the operation control section of a conventional clothes dryer, and FIG. 5 is a block diagram of the same clothes dryer. 2...Operation control unit, 3...Motor, 4
...Drum, 5...Drum lid, 6...
... Proximity switch, 7 ... Magnet, 8; ...
...Rotational position detection means. Name of agent: Patent attorney Shigetaka Awano

Claims (1)

[Claims] A drum that rotates around a horizontal direction, a drum lid for putting in and taking out clothes provided on a part of the outer peripheral surface of the drum, a rotational position detection means for detecting the rotational position of the drum, and the rotational position detection means. The control means includes an operation control unit that receives an input, a motor that drives the drum, and a motor drive unit that drives the motor, and when stopping the drum, the control unit controls the rotational position detection signal after inputting the rotational position detection signal. After stopping power supply to the motor for a certain period of time, electromagnetic braking is applied to the motor to rotate the drum at a low speed, and the drum lid is stopped at a predetermined position by repeatedly driving the motor in forward and reverse directions. Dryer.