Abstract: The present invention is to provide a rapidly rechargeable warning device, which includes a power receiving element for receiving external electric power, a charging control module for receiving electric power from the power receiving element, a fast energy storage element (e.g., a supercapacitor or any rapidly rechargeable components) being rapidly charged by the charging control module and then outputting electricity stored therein, an warning element (e.g., a light-emitting diode, a buzzer, or a vibrator) capable of issuing a warning signal (e.g., a light signal, a warning sound, or vibrations) upon receiving the electricity outputted by the fast energy storage element. Thus, since the fast energy storage element can be fully charged within a short time through being connected to a cigarette lighter socket of a car, or a transformer connected to an indoor power source, the warning device can be used immediately and effectively prevent user from using one-time batteries.

Abstract: 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.

Abstract: The present invention is to provide a rapidly rechargeable warning device, which includes a power receiving element for receiving external electric power, a charging control module for receiving electric power from the power receiving element, a fast energy storage element (e.g., a supercapacitor or any rapidly rechargeable components) being rapidly charged by the charging control module and then outputting electricity stored therein, an warning element (e.g., a light-emitting diode, a buzzer, or a vibrator) capable of issuing a warning signal (e.g., a light signal, a warning sound, or vibrations) upon receiving the electricity outputted by the fast energy storage element. Thus, since the fast energy storage element can be fully charged within a short time through being connected to a cigarette lighter socket of a car, or a transformer connected to an indoor power source, the warning device can be used immediately and effectively prevent user from using one-time batteries.

Abstract: 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.

Abstract: A portable dryer includes a housing, a motor installed with a fan inside the housing, a power unit for supplying electric power to the portable dryer, a switch electrically connected to the power unit, and a plurality heating filaments electrically connected to the power unit for generating heat. Power of the motor is related to power of the heating filaments.

Abstract: A portable dryer includes a housing, a motor installed with a fan inside the housing, a power unit for supplying electric power to the portable dryer, a switch electrically connected to the power unit, and four heating filaments electrically connected to the power unit for generating heat. Power of the motor is related to power of the heating filaments.

Abstract: A portable dryer includes a housing, a motor installed with a fan inside the housing, an electric heating device electrically connected to the motor for generating heat, a switch electrically connected to the motor, and a battery for supplying electric power to the portable dryer. When the switch is turned on, the battery can supply electric power to the motor and the electric heating device, making the electric heating device generate heat and the motor drive the fan and thus blowing out hot air generated by the electric heating device.