JPH0114318Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to the improvement of clothes dryers.
The aim is to make the drying time approximately the same regardless of the amount of dried cloth.

Conventionally, clothes dryers rotate the drum at a constant speed regardless of the amount of clothes and use a timer to finish the drying process, but because the drying completion time is affected by the amount of clothes and the type of fiber, It had the fundamental drawback of not being able to.

This idea was made to eliminate the above-mentioned drawbacks, and it changes the position of the drum depending on the weight of the clothes being dried, and effectively processes the amount of displacement to send a signal to the heater. An object of the present invention is to provide a clothes dryer that can make the drying time approximately equal regardless of the amount of cloth by controlling the input energy and the rotation speed of the motor.

Hereinafter, one embodiment of this invention will be explained in detail with reference to the drawings. The figure is a schematic diagram showing the main structure of an embodiment of this invention. In the figure, 1 is a cavity whose rotational center is not fixed (hereinafter referred to as a drum), 2 is a clothes slot opened at the front of the drum, 3 is an electric motor that provides rotational force (hereinafter referred to as a motor), and 4 is a part of the drum 1. A drive shaft directly connected to the rotor of the motor 3 in contact with the outer periphery, 5 a heater occupying a part of the space in the clothes input port 2, 6 a drum support roller (hereinafter referred to as roller) located in the direction of gravity of the drum 1; Reference numeral 7 indicates a spring (hereinafter referred to as a spring) that causes displacement of the drum support roller 6 in the direction of gravity, 8 a position detector (hereinafter referred to as a sensor) connected to the shaft of the drum support roller 6, and 9 a position sensor 8. This is a control circuit provided between the motor 3 and the heater 5 and having a frequency conversion function.

Next, the operation of the clothes dryer of this embodiment will be explained. When clothes to be dried are thrown into the drum 1 from the clothes input port 2, the spring 7 is elastically deformed by the weight of the thrown clothes, and the drum receiving roller 6 and the position sensor 8 are pushed down in the direction of gravity. captures the amount of depression, that is, the amount of displacement, as a signal and inputs it to the control circuit 9. The control circuit 9 performs frequency conversion according to this signal input. By this frequency conversion, it is possible to change the number of revolutions of the motor 3 and the amount of input to the heater 5, and the control circuit 9 is configured to increase the frequency when the amount of displacement is large. motor 3
The driving force is transmitted from the drive shaft 4 to the outer periphery of the drum 1, and the rotation of the drum 1 can be controlled. Therefore, the rotation speed of the clothes put into the drum 1 is determined by the motor 3 which is proportional to the weight of the cloth before drying and the weight of the cloth during drying.
As a result, the heater 5 operates, and the time required to complete drying can be made constant.

As described above, according to the clothes dryer having the configuration according to this invention, the number of revolutions of the drum and the input energy to the heater are controlled according to the weight of the clothes being dried, thereby reducing the drying time of the clothes. It has become possible to make it almost equal regardless of the amount of cloth. As a result, in terms of usability, it is possible to predict the drying end time fairly accurately at the time of starting drying, which has the effect of contributing to the user's work plan.

[Brief explanation of the drawing]

The figure is a schematic diagram showing the main structure of an embodiment of this invention. 1... Drum, 2... Clothes input slot, 3... Motor, 4... Drive shaft, 5... Heater, 6... Drum receiving roller, 7... Spring, 8... Position sensor, 9... Control circuit.

Claims (1)

[Scope of utility model registration request] A motor with a drive shaft in contact with the outer periphery of a drum whose center of rotation is not fixed, a drum support roller located in the direction of gravity of the drum, a position sensor that detects the amount of displacement of this drum support roller, and a signal from this position sensor. a control circuit that processes and converts the frequency;
A clothes dryer characterized by comprising a heater and a motor connected to the output of the control circuit.