JPH06154490A - Rotation control device - Google Patents

Abstract

PURPOSE:To provide a rotation control device with which rotary members such as a rotary drum, spin drying basket, etc., are rotated by a motor, wherein it is possible to easily check whether or not the revolving speed of each rotary member is controlled to the set value. CONSTITUTION:The rotation of a motor 5 to rotate a rotary drum 1 is controlled by a bidirectional thyristor 12, and the rotational period of the drum 1 is sensed by a rotation sensing means 7. The signal from this means 7 is fed to a control means 9 consisting of a microcomputer, and the thyristor 12 is controlled with the output of the control means 9. With this control means 9, an operation setting means 20 is connected for entering the data how the thyristor 12 is to be controlled, and when entry takes place with a specific operation which is unusual by the operation setting means 20, the control means 9 controls the drum revolving speed to the set value, and the set value of the drum revolving speed or the revolving speed sensed by the means 7 is given by an informing means 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotation control device for a clothes dryer, a washing machine, etc., in which a rotating body such as a rotating drum or a dehydrating tank is driven to rotate by a motor.

[0002]

2. Description of the Related Art In recent years, household clothes dryers, washing machines, and the like have become mainstream in which the rotation of a motor for driving a rotating body such as a rotating drum or a dehydrating tub is controlled by a power semiconductor element.

Conventionally, in this type of clothes dryer, washing machine, etc., the rotating bodies such as the rotating drum and the dehydration tub are controlled to be turned on and off according to the set operation course sequence, and the number of rotations thereof is controlled as necessary. It was general that it was configured to do.

[0004]

In such a conventional clothes dryer, washing machine, etc., when the number of rotations of the rotating body is not controlled to the set number of rotations, the product to be dried or the product to be dehydrated is not finished well. Had the problem of becoming. In particular, when the number of rotations of the rotating body is higher than the set number of rotations, there is a problem that the fibers that are easily worn when a mechanical force such as synthetic fiber or blanket is applied have a large damage to the cloth.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to make it possible to easily confirm whether or not the rotational speed of a rotating body is controlled to a set rotational speed.

[0006]

In order to achieve the above object, the present invention provides a motor, a power semiconductor element for controlling the rotation of the motor, a rotating drum driven by the motor, a rotation of a dewatering tank, and the like. A body, a rotation detecting means for detecting the number of rotations or a rotation cycle of the rotating body or a motor, a control means for controlling the power semiconductor element by a signal of the rotation detecting means, which is connected to the control means. An operation setting unit for inputting control contents of the power semiconductor element and an informing unit are provided, and the control unit sets the rotation speed of the rotating body to a predetermined value when the operation setting unit inputs a specific operation not normally used. To the set rotation speed of the motor or the rotating body by the notification means or the rotation speed detected by the rotation detection means. That in the to have the first means for solving problems.

Further, the notification means of the first problem solving means is composed of a numerical indicator such as a light emitting diode, a level meter, etc., and indicates the set rotation speed of the motor or the rotating body or the rotation speed detected by the rotation detection means. The display is made the second means for solving the problem.

Further, the notification means of the first problem solving means is constituted by a sounding body such as an electronic buzzer or a speaker, and notifies the set rotation speed of the motor or the rotating body or the rotation speed detected by the rotation detection means. This is the third means for solving the problems.

Further, the notification means of the first problem solving means is constituted by a numerical indicator such as a light emitting diode, a level meter, etc., and displays the set rotation speed arbitrarily selected from a plurality of rotation speeds by the operation setting means. This is the fourth means for solving the problem.

[0010]

According to the first means for solving the above problems, the present invention provides:
When input by a specific operation not normally used by the operation display means, the rotation speed of the rotating body can be controlled to a predetermined set rotation speed, and by notifying the set rotation speed by the notification means,
The set rotation speed can be easily confirmed, and the rotation speed of the rotating body can be easily confirmed by notifying the rotation speed detected by the rotation detection means by the notification means.

With the second means for solving the problem, the set rotational speed of the rotating body or the rotational speed detected by the rotation detecting means can be visually confirmed at a glance.

Further, according to the third means for solving the problems, the set rotational speed of the rotating body or the rotational speed detected by the rotation detecting means can be surely confirmed by hearing.

Further, according to the fourth problem solving means, it is possible to visually confirm at the same time the set rotational speed of the plurality of rotating bodies or the rotational speed detected by the rotation detecting means.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

As shown in the figure, a rotating drum (rotating body) 1
Is for accommodating and drying an object to be dried (clothing), and warm air is circulated in the rotary drum 1 by the heat exchange type double-blade fan 2. The heat exchange type double-blade fan 2 circulates warm air in the rotary drum 1 and at the same time takes in air from the outside to cool the fan and dehumidify the circulating air in the rotary drum 1. PT
The C heater 3 is arranged in the air blowing path to the rotary drum 1, that is, in the circulating air intake port to heat the circulating air. The filter 4 is provided in the ventilation path of the heat exchange type double-blade fan 2, that is, in the air outlet of the rotary drum 1. If the filter 4 is clogged with lint, the amount of air blown will decrease and P
The heating power of the TC heater 3 decreases, the drying time becomes longer, and the drying efficiency also decreases. The motor 5 rotationally drives the rotary drum 1 and the heat exchange type double-blade fan 2. By controlling the rotation speed of the motor 5, the rotation speeds of the rotary drum 1 and the heat exchange-type double-blade fan 2 can be controlled. It is possible to control the heat generation amount of No. 3 and control the current. Temperature detection means 6
Is for detecting the temperature of the intake air of the PTC heater 3.

The rotation detecting means 7 detects the rotation cycle of the rotary drum 1, and the magnet 8 is attached to the rotary drum 1 in the range of 3 to 3.
Six magnetic sensors (not shown) are fixed to the main body to detect the rotation cycle of the rotary drum 1. Control means 9
Is for controlling the rotation of the motor 5 and the PTC heater 3, and is a rotation speed setting means 1 for setting the rotation speed of the rotary drum 1.
0, the rotation speed comparison means 11 for comparing the output of the rotation detection means 7 and the output of the rotation speed setting means 10, and the bidirectional thyristor (power semiconductor) connected in series to the motor 5 by the output of the rotation speed comparison means 11. The rotation angle detecting means 7 includes a conduction angle controlling means 13 for controlling the conduction angle of the element 12 and a temperature controlling means 14 for inputting the output of the temperature detecting means 6.
The rotation speed comparison means 11 compares the difference between the rotation cycle (rotation speed) of the rotary drum 1 and the rotation speed set by the rotation speed setting means 10, and the conduction angle control means 13 controls the bidirectional thyristor 12. Then, the rotation speed of the motor 5 is controlled. Phase control can be considered as the simplest conduction time control method. In the case of an inverter, not only the conduction time but also the frequency is controlled. By doing so, stable rotation control of the motor 5 and the rotary drum 1 can be performed. Also, the rotating drum 1
The output of the temperature detecting means 6 for detecting the temperature of the circulating air is input to the temperature control means 14, and the output of the temperature control means 14 controls the relay contacts 15a and 15b respectively connected to the PTC heaters 3a and 3b. PTC heater 3a,
3b is turned on and off to control the temperature of the circulating air.

The current detecting means 16 is the current transformer 1.
7 and the current-voltage conversion circuit 18, detects the input current of the PTC heater 3, and outputs the output from the current comparison setting means 1.
Enter in 9. The current comparison setting means 19 compares the set current value of the PTC heater 3 with the output of the current detection means 16,
The output is input to the rotation speed setting means 10 to control the set rotation speed. Here, the set rotation speed set by the rotation speed setting means 10 is set so that the current of the PTC heater 3 does not exceed or fall below a predetermined current value.
The operation setting means 20 is connected to the control means 9 to operate and set a plurality of types of driving courses and the like. The operation setting means 20 inputs it to the rotation speed setting means 10 to set a set rotation speed according to the driving course. It is input to the temperature control means 14 and the temperature in the rotary drum 1 is controlled according to the output of the temperature detection means 6 according to the driving course.

When an input is made by the operation setting means 20 by a specific operation not normally used, the rotation speed of the rotary drum 1 is controlled to a predetermined rotation speed, and the rotation speed detected by the rotation detection means 7 by the notification means 21. Is notified. Here, when the operation setting means 20 is input by a specific operation which is not normally used, the rotational speed of the rotary drum 1 is set to a plurality of rotational speeds (for example, 36 rpm, 38 rpm, 40 rp).
m, 42 rpm, 45 rpm). As shown in FIG. 3 (a), the notification means 21 comprises a level meter 22 composed of a plurality of light emitting diodes. When the number of revolutions of the rotary drum 1 is controlled to 36 rpm, the light emitting diode 22a is turned on and controlled to 38 rpm. The light emitting diode 22b is turned on at this time, the light emitting diode 22c is turned on when controlled at 40 rpm, the light emitting diode 22d is turned on when controlled at 42 rpm, and the light emitting diode 22e is turned on when controlled at 45 rpm. Further, the notification means 21 may be configured by a numeral display 23 as shown in FIG. 3 (b). In addition, the notification means 21
May be composed of a sounding body such as an electronic buzzer or a speaker, and a level meter 22, a numeral display 23 and an electronic buzzer,
You may use together with a speaker such as a speaker.

The operation of the above structure will be described with reference to FIGS. 4 and 5. FIG. 4 is an operation flowchart of one embodiment of the present invention.
Then, the rotation speed of the rotary drum 1 is set to an arbitrary rotation speed among a plurality of set rotation speeds, and the motor 5 is turned on. In step 33, the timer starts counting, and in step 34
Then, it is determined whether or not a rotation signal is input from the rotation detection means 7. Step 3 when the rotation signal is input
5, the timer is stopped, that is, after a certain time has passed since the motor 5 was turned on, the step 36
Then, the rotation speed is calculated from the rotation cycle input from the rotation detection means 7. Then, in step 37, the detected rotation speed of the rotary drum 1 is displayed by the level meter 22 or the numeral display 23, and in step 38, the buzzer sounds. Buzzer
A rotation detection signal of the rotary drum 1 by the rotation detection means 4 as shown in FIG. 5A is triggered by being input at every rotation cycle T, and as shown in FIG. 5B, a predetermined time (for example, , 40 msec). Then, in step 39, it is determined whether or not there is an end signal, and when the end signal is input, the process proceeds to step 40 and the motor 5 is turned off. If the end signal is not input in step 39, the process proceeds to step 41, the timer is cleared, and the process returns to step 33. The operation is the same when the rotation speed of the rotary drum 1 is set to another rotation speed.

As described above, according to this embodiment, the control means 9 controls the rotation speed of the rotary drum 1 to a predetermined set rotation speed when the operation setting means 20 inputs a specific operation which is not normally used. The notifying unit 21 notifies the number of rotations detected by the rotation detecting unit 7, and the notifying unit 21
The number of rotations of the rotary drum 1 is a predetermined number of rotations, since the number of rotations is arbitrarily selected from a plurality of rotations by the operation setting means 20. It is possible to easily confirm whether or not the control is performed and to notify by the electronic buzzer, so that the number of rotations detected by the rotation detecting means 7 of the rotating drum 1 can be surely confirmed by hearing.

Next, another embodiment of the present invention will be described with reference to FIG. As shown in FIG.
The output of the rotation speed setting means 10 is input to inform the set rotation speed of the rotary drum 1. The other structure is the same as that of the above embodiment.

The operation of the above configuration will be described with reference to FIGS. 7 and 8. The steps that perform the same operations as those in the above embodiment are designated by the same reference numerals and the description thereof will be omitted.

After step 35, the routine proceeds to step 42, where the rotation speed of the rotary drum 1 is controlled. This rotation speed control is shown in FIG.
This will be described with reference to the subroutine shown in step 51.
Then, the rotation cycle T of the rotary drum 1 is detected, and the routine proceeds to step 52. In step 52, the rotation speed comparison means 11 detects an error from the setting cycle Ts set by the rotation speed setting means 10, and the process proceeds to step 53 to determine whether the detected error is within the setting range, and within the setting range. If there is, proceed to the next step (step 43 in FIG. 7). If the detected error is not within the set range, the process proceeds to step 54, the conduction angle control means 13 calculates and sets the control phase, and the rotation speed of the rotary drum 1 is controlled to the rotation speed set by the rotation speed setting means 10. Then proceed to the next step. In this way, after controlling the rotation speed in step 42 of FIG. 7, the notification means 21 notifies the set rotation speed in step 43. The notification method is the same as in the above embodiment.

As described above, according to this embodiment, the control means 9 controls the number of revolutions of the rotary drum 1 to a predetermined set value when the operation setting means 20 inputs a specific operation which is not normally used, Since the notification means 21 notifies the set rotational speed of the rotary drum 1, the set rotational speed can be easily confirmed.

In each of the above embodiments, the case where the rotary drum 1 and the heat exchanging type double-blade fan 2 are driven by one motor 5 has been described, but the effect is the same even if two motors are provided. Is. Further, the case where the rotating body is the rotating drum 1 of the clothes dryer has been described, but the same applies to the case where the rotating drum 1 is a dehydrating tub of a washing machine.

[0026]

As is apparent from the above embodiments, according to the present invention, the motor, the power semiconductor element for controlling the rotation of the motor, the rotation of the rotary drum and the dehydration tub which are rotationally driven by the motor, and the like. A body, and rotation detection means for detecting the number of rotations or the rotation cycle of the rotating body or the motor,
A control means for controlling the power semiconductor element by a signal from the rotation detecting means, a manipulation setting means for connecting to the control means for inputting control contents of the power semiconductor element; and an informing means. The control means controls the rotation speed of the rotating body to a predetermined setting rotation speed when input by a specific operation not normally used by the operation setting means, and the setting rotation speed of the motor or the rotation body by the notification means or Since the rotation speed detected by the rotation detection means is notified, the rotation speed of the rotating body can be controlled to a predetermined set rotation speed when an input is made by the operation display means by a specific operation not normally used. By informing the number by the informing means, it is possible to easily confirm the set number of revolutions, and the informing means indicates the number of revolutions detected by the rotation detecting means. By knowledge it can easily confirm the number of revolutions of the rotary member.

Further, the notification means is composed of a numerical indicator such as a light emitting diode, a level meter, etc., and displays the set rotation speed of the motor or the rotating body or the rotation speed detected by the rotation detection means. The set rotational speed of the body or the rotational speed detected by the rotation detecting means can be visually confirmed at a glance.

Further, the notifying means is composed of a sounding body such as an electronic buzzer, a speaker, etc., and the rotating speed set by the motor or the rotating body or the rotating speed detected by the rotation detecting means is notified. The number of rotations or the number of rotations detected by the rotation detecting means can be surely confirmed by hearing.

Further, the notifying means is composed of a numeral display such as a light emitting diode, a level meter, etc., and the set rotation speed arbitrarily selected from the plurality of rotation speeds is displayed by the operation setting means. The set rotation speed of the rotating body or the rotation speed detected by the rotation detecting means can be visually confirmed at the same time.

[Brief description of drawings]

FIG. 1 is a block diagram of a clothes dryer according to an embodiment of the present invention.

FIG. 2 is a sectional view of the clothes dryer.

[Fig. 3] (a), (b) Front view of notification means of the clothes dryer.

FIG. 4 is an operation flowchart of the clothes dryer.

FIG. 5 (a), (b) rotation detection signal waveform diagram and notification means input signal waveform diagram of the clothes dryer.

FIG. 6 is a block diagram of a clothes dryer according to another embodiment of the present invention.

FIG. 7 is an operation flowchart of the clothes dryer.

FIG. 8 is a subroutine flowchart of the rotation speed control of the clothes dryer.

[Description of Reference Signs] 1 rotating drum (rotating body) 5 motor 7 rotation detecting means 9 control means 12 bidirectional thyristor (power semiconductor element) 20 operation setting means 21 notification means

Claims (4)

[Claims] 1. A motor, a power semiconductor element for controlling the rotation of the motor, a rotating body such as a rotating drum and a dehydration tub which is driven to rotate by the motor, and a rotation speed or a rotation cycle of the rotating body or the motor. Rotation detecting means for detecting, a control means comprising a microcomputer for controlling the power semiconductor element by a signal of the rotation detecting means, an operation setting means connected to the control means and inputting control contents of the power semiconductor element, When notifying by the operation setting means by a specific operation not normally used, the control means controls the rotation speed of the rotating body to a predetermined set rotation speed, and the notification means causes the motor or the A rotation control device configured to notify a set rotation speed of a rotating body or a rotation speed detected by the rotation detecting means. 2. The notification means comprises a numerical indicator such as a light emitting diode, a level meter, etc., and displays the set rotation speed of the motor or the rotating body or the rotation speed detected by the rotation detection means. The rotation control device described. 3. The rotation according to claim 1, wherein the notification means is composed of a sounding body such as an electronic buzzer, a speaker, etc., and notifies the set rotation speed of the motor or the rotating body or the rotation speed detected by the rotation detection means. Control device. 4. The notification means comprises a numeral display such as a light emitting diode, a level meter, etc., and the operation setting means displays a set rotation speed arbitrarily selected from a plurality of rotation speeds. Rotation control device.