JPH0499600A - Controller for clothing drier - Google Patents

Abstract

PURPOSE:To stabilize a heater load current at a level less than a constant value and to improve drying efficiency by controlling a fan rotating speed adjusting means for the adjustment of the rotational speed of a rotary fan corresponding to a load current that flows in a heater. CONSTITUTION:When a heater load current detecting means 8 detects the fact that the load current of the heater 7 exceeds a prescribed critical value, the rotation of the rotary fan 3 is decreased to a certain value by the fan rotating speed adjusting means 11. When the load current of the heater 7 goes down less than the prescribed critical value, the rotational speed of the rotary fan 3 is increased again, and such operation is repeated while driving is continued. Thereby, air quantity to be sent to the heater 7 can be decreased by decreasing the rotational speed of the rotary fan 3, and the ambient temperature of the heater 7 rises, and the heater load current is reduced. Also, the air quantity to be sent to the heater 7 is increased by increasing the rotational speed of the rotary fan 3, and the ambient temperature of the heater 7 goes down, and the heater load current is increased. Therefore, it is possible to stably control the heater load current less than the constant value by adjusting the rotational speed of the rotary fan 3.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a clothes dryer for general household use, and in particular, by adjusting the rotation speed of a rotating fan, the load current of the heater is kept below a predetermined value. This invention relates to a control device for a clothes dryer.

BACKGROUND OF THE INVENTION In recent years, clothes dryers that blow hot air into a rotating drum to dry the clothes inside the drum have become mainstream.

Regarding an example of the configuration of a conventional clothes dryer of this kind, the fifth
This will be explained with reference to the figures and FIG. As shown in FIG. 5, a motor 2 is provided on the upper part of the housing 1, and a rotary fan 3 is provided on the back side of the housing 1 and the motor 2.
Belts 5 and 6 are stretched between the rotary fan 3 and a rotary drum 4 provided in front of the motor 2.
The rotary fan 3 and the rotary drum 4 are rotated by the drive of the rotary fan 3 and the rotary drum 4. In addition, a heater 7 is arranged on the front side of the housing 1,
A heater load current detection means 8 is provided near the heater 7, and when the output of the heater load current detection means 8, that is, the load current of the heater 7 exceeds a certain level, the circuit breaker is prevented from operating due to the inflow of overcurrent. , turn heater 7 to 0FF
L. When the load current becomes below a certain value, turn on the heater 7 again.
I'm L. As shown in FIG. 6, when the load current value reaches a constant value IH, the heater 7 is energized to 0FFL, and when the current value reaches IL, the heater 7 is energized again.

Problems to be Solved by the Invention In such a conventional configuration, the power supply to the heater 7 is limited to 0N1.
By turning off the heater 7, excessive current is prevented from flowing into the heater 7, resulting in poor drying efficiency, and since the temperature inside the rotating drum 4 is not constant, it is difficult to detect the temperature.

The present invention solves the above problems, and aims to provide a control device for a clothes dryer that can stabilize the load current flowing into the heater 7 below a certain value and improve drying efficiency. be.

Means for Solving the Problems In order to achieve the above object, the present invention provides a fan rotation speed adjustment method for adjusting the rotation speed of a rotary fan according to the load current flowing into the heater obtained by the heater load current detection means. The heater load current is stabilized below a certain value by controlling the means.

Operation According to the above-described structure, when the fan rotation speed is lowered, the amount of air blown to the heater decreases, so the ambient temperature of the heater increases, and the heater load current decreases. Furthermore, when the rotational speed of the fan is increased, the amount of air blown to the heater increases, so the ambient temperature of the heater decreases, and therefore the heater load current increases.

In this manner, by adjusting the rotation speed of the fan, the heater load current can be stably controlled to be below a certain value.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 4.

In addition, compared to the conventional example, the present invention is provided with a fan driving motor 2- that drives the rotating fan 3 separately from the drum driving motor 2' that drives the rotating drum 4, and other parts are the same as the conventional example. The same numbers will be given to the same numbers, and detailed explanations will be omitted.

As shown in the figure, the control bag ffrlo has a fan rotation speed adjusting means 11 for adjusting the rotation speed of the fan drive motor 2''.
, a drum rotational speed adjusting means 12 for adjusting the rotational speed of the drum drive motor 2', and a heater 1 and heater load current detection means 8 are connected.

The operation of the above configuration will be explained with reference to the flowchart of FIG. 3. In step 20, the heater load current detection means 8
When the fan speed adjustment means 1 is detected in step 21,
1, the rotation of the rotary fan 3 is decreased to a certain value. Then, in step 22, the load current of the heater 7 is changed to the fourth
When the ID becomes lower than the ID shown in the figure, the rotation speed of the rotary fan 3 is increased again in step 23, and in step 24, if the operation is continuing, the process returns to step 20, and this series of operations is repeated.

According to the above embodiment, when the rotation speed of the rotary fan 3 is lowered, the amount of air blown to the heater 7 is reduced.
The ambient temperature increases and the heater load current decreases. Also,
When the rotation speed of the rotary fan 3 is increased, the amount of air blown to the heater 7 increases, so the ambient temperature of the heater 7 decreases and the heater load current increases. By adjusting the rotational speed of the rotary fan 3 in this manner, the heater load current can be stably controlled to be below a certain value.

Effects of the Invention As is clear from the above embodiments, according to the present invention, the heater load current can be efficiently controlled to a certain value or less, and the drying efficiency can be improved and the drying time can be shortened. We can provide a dryer control device.

[Brief explanation of drawings]

3 is a flowchart of the same control, and FIG. 4 is a graph showing changes in the heater load current of the clothes dryer. 2゛...Drum drive motor, 2°...
・Fan drive motor, 3...Rotating fan, 4
...Rotating drum, 7...Heater, 8.
... Heater load current detection means, O ... Control device, 1 ... Fan rotation speed chart adjustment means.

Claims (1)

[Claims] A rotating fan that sends hot air into a rotating drum that rolls clothes, heater load current detection means that detects a load current of a heater that is a heat source of the hot air, and fan rotation speed adjustment means that adjusts the rotation speed of the rotary fan. A control device for a clothes dryer, which adjusts the rotation speed of the rotary fan so that the load current of the heater is equal to or less than a predetermined value.