JP2640060B2 - Hair dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair dryer for drying and styling hair by applying hot and cold air to the hair.

[0002]

2. Description of the Related Art A hair dryer is designed to selectively take out hot air and cold air in order to dry or styling the hair. The selection of the warm air and the cool air is made by manually switching a switch, but the cool air which is used less frequently than the warm air can be obtained only when the switch lever is pushed as shown in Japanese Utility Model Publication No. 58-39122. Like that.

However, since the switching between the hot air and the cold air is performed manually, the operation is troublesome, and at the time of the switching, it is necessary to change the direction of the main body to a position where the switch can be easily operated. In particular, it is effective to set the hair by warming the hair sufficiently with warm air to create the desired wave, and then suddenly applying cold air to the hair during hairdressing.
In this case, there is also a problem that the use frequency of the cool air increases accordingly and the number of times of the switching increases, so that the operability decreases.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and improves operability by automatically and alternately obtaining hot air and cold air as well as hot air and cold air. The task is to measure

[0005]

SUMMARY OF THE INVENTION The present invention relates to a hair dryer which can selectively generate hot air and cold air.
A switch for selecting intermittent generation of hot air and cold air, and heating control means for intermittently switching the heater between a heating state and a heating stop state at predetermined intervals when the intermittent generation of hot air and cold air is selected by the switch. Is provided.

[0006]

According to the present invention, when the intermittent generation of the hot air and the cold air is selected by the switch, the switching between the heating state and the heating stop state of the heater is intermittently performed at predetermined intervals, and the hot air and the cold air are automatically generated. Occur alternately, and the operability during hair styling is improved. Further, if the intermittent generation of the hot air and the cold air is not selected by the switch, the continuous generation of the hot air or the cold air can be selectively performed.

[0007]

An embodiment of the present invention will be described with reference to FIG.
(1) is a heater that constitutes a heater, (2) is a motor that rotationally drives and blows a fan (not shown), (3) is a rectifier that applies a direct current to the motor, and (4) is a rectifier. A step-down resistor connected in series, (5) is a control circuit for controlling the phase of the heater (1), a semiconductor switching element (6) connected in series to the heater (1), a capacitor (7) and a positive temperature coefficient thermistor (8). Series circuit and constant voltage conducting element (9)
And a gate circuit (10). The positive temperature coefficient thermistor (8) is provided close to the heater (1), and its resistance value constantly increases and decreases according to the temperature of the hot air.
(11) is a timer which opens and closes a switch (12) connected in series with the positive temperature coefficient thermistor (8) at a predetermined interval, and closes the switch (12) when not operating. The timer (11) and the switch (12), together with the phase control circuit (5), constitute heating control means for controlling intermittent generation of hot air and cold air.

[0008] (13) is a constant voltage circuit for driving the timer (11), which comprises a Zener diode (14) and a smoothing capacitor (15). (16) is an operation switch provided on the timer (11) side to select the operation of the timer, that is, intermittent generation of hot air and cold air. (17) is provided with two interlocking pieces (18) and (18). A power supply switch supplies power to the motor (2) side and the heater (1) side at the same time to discharge warm air, or supplies power only to the motor (2) side to continuously discharge cool air. (19) is a thermal fuse, (20) is a limiter, (21) is a noise prevention capacitor, (22) is a DC step-down circuit including a resistor (23) and a diode (24), and (25) is a choke coil.

Next, the operation will be described. First, when hot air and cold air are obtained alternately, the contact pieces (18) and (18) of the power supply switch (17) are connected to the motor (2) side and the heater (1).
Side and close the operation switch (16). When the operation switch is closed, the timer (11) counts, and since the switch (12) is initially closed, the heater (1) generates heat and discharges hot air. After a lapse of a predetermined time (about 20 seconds), the switch (12) is opened by the timer (11), the supply of voltage to the gate circuit (10) is cut off, and cool air is discharged. When the timer (11) counts again and the discharge state of the cool air elapses a predetermined time (about 10 seconds), the switch (12) is closed by the output and the warm air is discharged. In this way, hot air and cold air are automatically and intermittently obtained.

Further, the positive temperature coefficient thermistor (8) for detecting the temperature of the hot air has a small resistance value when the temperature of the hot air is low, so that the constant voltage conductive element (9) becomes conductive and the semiconductor switching element (6). And the heater (1) is energized. When the temperature of the warm air rises, the resistance value increases, the conduction angle of the semiconductor switching element (8) changes, and the amount of heat generated by the heater (1) is reduced to increase the temperature. Maintain the wind temperature constant.

When the interlocking switch (26), which is closed by the output of the timer, is connected to a part of the step-down resistor of the motor as shown by the broken line in the drawing, the switch is opened by the timer output and the cold air is discharged. As the number of rotations of the motor increases, the amount of cool air increases, and the heated hair can be rapidly cooled to enhance the hair styling effect.

[0012]

As described above, according to the present invention, not only can hot air or cold air be continuously generated, but also hot and cold air can be automatically and alternately generated. And a wind most suitable for hair styling can be selectively generated. In particular, when setting hair with customizing by hot air and setting by cold air at the time of hair styling, warm air and cold air can be generated automatically and alternately, eliminating the need for manual switching as in the past, and improving operability. Can be improved.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram showing one embodiment of the present invention.

[Explanation of symbols]

 1 Heater 2 Motor 11 Timer 16 Operation switch

Claims (1)

(57) [Claims] In a hair dryer capable of selectively generating hot air and cold air, a switch for selecting intermittent generation of hot air and cold air, and when this switch selects intermittent generation of hot air and cold air, A hair dryer comprising a heating control means for intermittently switching a heater between a heating state and a heating stop state at predetermined intervals.