JPH021481B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a phase-controlled hair dryer.

[Background technology]

A phase-controlled hair dryer that controls heater power or a motor requires a filter, such as an inductance element, to reduce noise. When increasing the number of turns of copper wire in the coil of the toroidal core in order to increase the inductance value of this inductance element, it is necessary to reduce the wire diameter of the copper wire.

However, when the copper wire is made thinner, heat generation in the toroidal core becomes a problem (it rises to nearly 200 degrees Celsius in steady state), and the withstand voltage of the coil becomes a problem.

[Purpose of the invention]

An object of the present invention is to provide a phase-controlled hair dryer that can enhance the cooling effect of an inductance element and enhance the noise prevention effect, and can also arrange a toroidal core and phase control components in a compact and compact manner.

[Disclosure of the invention]

The phase-controlled hair dryer of the present invention includes: a main body having an air passage; an inductance element for noise prevention having a ring-shaped toroidal core disposed in the air passage and having a hollow portion penetrating in the air blowing direction; and a phase control component disposed within the hollow portion of the toroidal core within the air passage.

According to the configuration of the present invention, the inductance element and the phase control component can be sufficiently cooled, the inductance value can be increased, and the noise prevention effect can be enhanced. can be made small and compact.

Embodiment An embodiment of the present invention is shown in FIGS. 1 to 5. That is, 1 is a cylindrical main body with an air passage 1a, 2 is a suction port, 3 is a wind guide, 4 is a motor,
5 is a fan, 6 is a heater, 7 is a phase control section, 8 is a discharge port, 9 is a power cord, and 10 is a cord bush. The phase control unit 7 is disposed in the air passage 1a of the main body 1, and is integrally formed with the main body 1 so that a pair of support frames 11 and 12 are lined up in the air blowing direction of the main body 1. As shown in FIG. 4, a phase control component 14 is mounted on a printed circuit board 13. Further, a hollow portion 16a of the toroidal core 16, around which a coil 15, which is an inductance element for noise prevention, is wound so as to be linked to the printed circuit board 13, is arranged with its axis aligned with the air blowing direction, and is suspended by a hanging tool 17. It is attached to a printed circuit board 13. As a result, the phase control component 14 is placed within the hollow portion 16a of the toroidal core 16.

FIG. 5 shows a phase control circuit of this phase control type hair dryer. That is, the AC power supply AC is rectified by the bridge circuit B to supply DC power to the motor 4, and also to the series circuit of the heater 6, the coil 15, and the triac Q. The triax Q is used to apply a control voltage from the control circuit 18 to its gate to intermittent the heater current. A control voltage output from the control circuit 18 detects the temperature of the hot air by a sensor (not shown) disposed near the heater 6, and controls the triax Q so that the temperature is constant. A capacitor C is connected in parallel to the series circuit of the coil 15 and the triax Q to enhance the noise prevention effect. That is, by connecting the coil 15 in series with the triax Q, the noise generated by the triax Q is absorbed, and the capacitor C also absorbs noise.

Due to the above operation, the fan 5 rotates and takes in air from the suction port 2, passes through the air passage 1a, and reaches the discharge port 8.
However, on the way, it passes through the hollow part 16a of the toroidal core 16 and its surroundings, which cools it and also cools the phase control component 14 on the printed circuit board 13.

With this configuration, even if the wire diameter of the copper wire wound around the toroidal core 16 is reduced in order to increase the inductance value of the coil 15, heat generation can be suppressed by utilizing the wind generated by the fan 5.
In addition, a phase control component 14 is included in the toroidal core 16.
, the main body 1 can be made small and compact. This also increases the coil diameter, increasing the inductance value and improving the noise prevention effect.

〔Effect of the invention〕

The phase control type hair dryer of the present invention can sufficiently cool the inductance element and the phase control component, increase the inductance value and enhance the noise prevention effect, and arrange the phase control component inside the hollow part of the toroidal core. This has the effect of making the entire device smaller and more compact.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of its phase control section, FIG. 3 is a cross-sectional view taken along the - line, FIG. Figure 5 is a circuit diagram. DESCRIPTION OF SYMBOLS 1... Main body, 1a... Air flow path, 14... Phase control component, 16... Toroidal core, 16a... Hollow part.

Claims (1)

[Claims] 1. A main body having an airflow path, a noise prevention inductance element having a ring-shaped toroidal core disposed in the airflow path and having a hollow portion penetrating in the airflow direction, and an inductance element of the toroidal core in the airflow path. A phase control type hair dryer equipped with a phase control component arranged inside a hollow part.