Multi-setting circuits for the portable dryer

摘要

A dryer circuit includes a main circuit and a connection controller. The dryer circuit includes a power unit, a first and second heating units, a first and a second switches, a motor having a fan installed, a resistor, a first diode, and a second diode. The first and the second heating units are coupled to ground respectively through the first and the second switches. The resistor is coupled between the first heating unit and the motor. The first diode is coupled between the second heating unit and the motor. The second diode is coupled between the first heating unit and the motor and in series with the resistor. The connection controller controls the first and the second switches on or off for adjusting the power supplied to the motor, and the first and the second heating units at the same time.

主权项

1. A dryer circuit comprising:
a main circuit, comprising:
a power unit, comprising:
a first end for providing a first predetermined voltage; anda second end for providing a second predetermined voltage;a first heating unit, comprising:
a first end; anda second end coupled to the second end of the power unit;a second heating unit, comprising:
a first end coupled to the first end of the first heating unit; anda second end;a fan motor, comprising:
a first end coupled to the first end of the first heating unit; anda second end;a diode coupled between the second end of the second heating unit and the second end of the fan motor; anda resistor coupled between the second of the first heating unit and the second end of the fan motor; anda connection controller comprising:
a first electronic switch, comprising:
a first end coupled to the first end of the first heating unit;a second end coupled to the first end of the power unit; anda control end;wherein the first end of the first electronic switch is coupled to the second end of the first electronic switch when the control end of the first electronic switch receives the first predetermined voltage;a second electronic switch, comprising:
a first end coupled to the second end of the second heating unit;a second end coupled to the second end of the power unit; anda control end;wherein the first end of the second electronic switch is coupled to the second end of the second electronic switch when the control end of the second electronic switch receives the first predetermined voltage; anda switching device for coupling the control end of the first electronic switch to the first end of the power unit, or coupling both the control ends of the first and the second electronic switches to the first end of the power unit.