JPS59135098A - Voltage change-over apparatus of clothing dryer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a voltage switching device for a clothes dryer.

[Prior art]

In places where the power supply voltage is different, use a voltage switching device to switch the voltage and use the clothes dryer. This voltage switching often requires a full transformer. Clothes dryers use large-capacity and large-volume heaters, so they require large container transformers. As a result, clothes dryers have become larger, more important, and more expensive.

[Purpose of the invention]

The present invention addresses the above-mentioned drawbacks, and aims to reduce the size of the clothes dryer by requiring only a small-capacity transformer, increase the size of the clothes dryer, and increase the weight. It is an attempt to provide something that can be suppressed. \ [Summary of the Invention] The present invention provides a transformer with a capacitance that matches the combined capacitance of a blower fan motor and a timer motor, and when the operating voltages of the motor and timer motor match, the motor and timer motor are switched off from the power source. If the working voltage of the electric motor and timer motor does not match the power supply voltage, connect the electric kIJPA and timer motor to the power supply through a transformer, and the heater will be powered on at either power supply voltage. This allows the connection to be made without using a transformer.

Since the large current of the heater does not flow through the transformer, a small-capacity transformer is sufficient, and the above drawbacks can be solved all at once.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to all the drawings.

1 to 4 are control circuit diagrams of a clothes dryer according to the present invention.

1 is a door switch that is turned on and off by opening and closing the door of the dryer. 2 and 3 are independent heaters, and 4 is a transformer 4 attached to the rear of the main body. 5 and 6 are a timer cam switch A1 cam switch B, lj: and a timer motor.

8 is a motor that drives the drying drum and the blower fan.

First, the case of high-voltage delivery (200V in Japan) will be explained using Figures 1 and 2. When the item to be dried is placed in the dryer and the door is closed, the door switch 1 closes. Next, when the timer is set, the cam switch A5 and cam switch B6 of the timer are closed, and at the same time as the motor 8 is driven, electricity is applied to the heaters A2 and B3, and drying begins.

In FIG. 1, heater A2 and heater B3 are connected in parallel to a power source and have a resistance value that generates a predetermined input at a high voltage. In FIG. 2, only heater A2 generates heat at high voltage.

The timer motor 7 and the motor 8 are connected through a transformer 4 and are configured to operate at a predetermined low voltage (100V).

The dryer starts operating, and the timer 7) [Cam switch B6 opens a few minutes before the end time, and air drying without energizing the dryer 2.3 starts, and then the cam switch B5 opens and drying ends.

The heater A2, the heater B3, and the transformer 4 are constructed so that they can be easily connected to the input terminal 9, etc., as shown in Fig. 1.2. Third
．． 4 Change the wiring as shown in Figure 4.

The circuit shown in FIG. 1 for low voltage service is shown in FIG. 3, and the circuit shown in FIG. 2 for low voltage service is shown in FIG.

The series connection of heater A2 and heater B3 in FIG. 1 is changed to parallel connection as shown in FIG. 3 when the voltage is low.

In this case, by adjusting the resistance values of heater A2 and heater B3, the input can be made the same as when the voltage is high.
It is also possible to change.

In the case of the circuit shown in FIG. 3, by connecting the heaters B3 in parallel or in series, which are not applied at high voltages, it is possible to input the same voltage as the city voltage, or to change it.

Free terminals are created, such as the terminals of the transformer 4 at low voltage or the terminals of the heater B3 in FIG. 2, but from the viewpoint of safety and blood-gas insulation, sufficient insulation should be maintained.

In the above embodiment, the terminals of the high and low voltage switching parts are switched by plug-in terminals, etc. However, if the lead wires are lengthened and gathered in one place at the back of the dryer, the switch can be switched by a simple touch using a connector etc. 9. Switching between high and low voltages can be done by simply removing the back cover 10, making it extremely easy for customers to do so.

In addition, due to problems with the operability and installation of dryers, there is a trend in favor of thinner outer boxes for dryers. In order to do this, it is necessary to increase the outer diameter of the drying drum, and if the width and height of the outer box are set to a certain size and the drying drum is made as thick as possible, the outer diameter of the outer box and There is only enough space for the four corners of the drying drum, and even in this narrow space, it is possible to install a transformer with enough capacity to switch between high and low car pressures for motor 1 and timer motor 7. becomes.

In addition, as mentioned above, the outer box has been made thinner, and the door diameter has been increased to improve the operability of loading and unloading dry goods.When used on the floor, especially tall legs and casters have been installed. Sometimes, the center of gravity of the dryer becomes high and there are stability problems such as the main body moving when the door is opened, but by installing the small and heavy transformer according to the present invention, the weight of the main body can be increased. Also, the balance can be maintained and the stability of the dryer can be significantly improved.

Note that if the motor 8 and the timer motor 7 are of high voltage specification, a step-up transformer may be used. Further, it is also within the scope of the present invention to use any components other than motor 8 and motor 7 (lamp, control circuit, etc., excluding heaters 2 and 3).

〔Effect of the invention〕

As described above, according to the present invention, low voltage can be switched by using a low capacity transformer required for converting only the motor and timer motor, and high and low voltage can be switched by using a combination of multiple heaters. This makes it possible to switch between high and low voltages at low cost, and the switching method is very simple.
It is possible to provide a high/low voltage switching dryer that is suitable for commercial voltage delivery and has a significantly short drying time.

[Brief explanation of the drawing]

1 and 2 show an embodiment of a control circuit according to the present invention when using a high voltage, and FIGS. 3 and 4 show a control circuit in which the control circuit of FIGS. 1 and 2 is switched to a low voltage. FIG. 5 shows an embodiment of a clothes dryer according to the present invention.

Claims (1)

[Claims] 1. A rotatable drum for drying clothes, a fan that blows air into and out of the drum, an electric motor that drives the fan, and a heater that completely heats the air that enters the drum.
In a device consisting of an electric motor and a timer motor that controls the operating time of the heater, a transformer with a capacitance corresponding to the combined capacitance of the motor and the timer motor is provided,
When the working voltage of the motor and timer motor matches the power supply voltage, connect the motor and timer motor to the power supply without using a transformer, and when the working voltage of the motor and timer motor and the power supply voltage do not match, the motor and timer motor The clothes dryer is characterized in that the heater is connected to the power supply via a transformer, and the heater is connected to the power supply without using the transformer at any power supply voltage.