JPH0277205A - Hair dryer - Google Patents

Abstract

PURPOSE:To improve a blasting efficiency by using a heater to be a specification larger than a rated energy consumption and to have a smaller widing number, connecting an energy consumption limiting resistance in series to a wind temperature sensor and executing a heater control in a condition in which a phase angle is notched beforehand. CONSTITUTION:A trigger element T is connected to the connecting point of a wind temperature sensor FS and a capacitor C1, and the trigger element T is connected to a switching element S connected in series to a heater H. By turning on and off the switching element S by means of the trigger element T according to a temperature detected with the wind temperature sensor FS, a current flowing to the heater H is phase-controlled. Here, in order to lower a blasting resistance with the heater H, the heater in the specification, in which the energy consumption made of the same heater line as one having a sectional area for 1200W is 1500W, is used as the heater H when the necessary energy consumption is 1200W.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to portable hair dryers, and in particular to the control of their heaters.

[Conventional technology]

As a control for the heater of a portable hair dryer, one shown in FIG. 6 has been proposed in order to be able to obtain hot air at a constant temperature regardless of the temperature of the environment in which it is used. This consists of a switching element S connected in series to a heater H,
A wind temperature sensor FS consisting of a positive characteristic thermistor is provided, and according to the wind temperature detected by the wind temperature sensor FS,
The trigger element T turns on and off the switching element S, thereby controlling the phase of the heater H and setting the air temperature to a predetermined value. CC is a choke coil for miscellaneous prevention.

[The problem that the invention tries to solve! i! ]

In this case, a heater H with a higher wattage must be used than one that does not perform such control, and if it is placed in a small space for miniaturization, the air resistance will be large. There is a problem in that the amount of air blown must be increased in order to The present invention has been made in view of these points, and its purpose is to provide a hair dryer with low air blowing resistance and high air blowing efficiency despite using a high-wattage dryer. There is something to do.

[Means to solve the problem]

However, the hair dryer according to the present invention uses an air temperature sensor and a switching element connected in series to the heater to perform phase control of the heater according to the output of the air temperature sensor, and the heater has a power consumption that is lower than the rated power consumption. It is characterized by the fact that it has large specifications and a small number of turns, and a power consumption limiting resistor is connected in series with the wind temperature sensor, and the heater is controlled with the phase angle cut out in advance. have. [Function] According to the present invention, since the number of windings of the heater is small, the blowing resistance can be lowered, and since the heater is energized with the phase angle cut out in advance, a heater with a specification larger than the power consumption is used. However, the power consumption can be rated. [Example] The present invention will be described in detail below based on the illustrated example. As shown in FIGS. 3 to 5, this hair dryer has a blower device consisting of a motor M and a fan F, and a heater H. It consists of a main body 1 disposed inside and a grip 2 whose one end is rotatably connected to a connecting part 10 protruding from the main body 1, and a cylindrical grip 2 is provided at the distal end of the main body 1 on the discharge port side. A shaped nozzle cover 19 is attached, and a filter 18 is attached to the other end of the main body 1 on the suction port side. In the figure, 23 is a power cord drawn out from the grip 2. A circuit diagram of this hair dryer is shown in FIG. In the figure, H is a heater, FS is an air temperature sensor consisting of a positive characteristic thermistor in which a power consumption limiting resistor R and a time constant setting capacitor C3 are connected in series.
A trigger element T is connected to the connection point between S and the capacitor CI, and the trigger element T is connected to a switching element S connected in series with the heater H. Air temperature sensor F
The trigger element T turns on and off the switching element S according to the temperature detected by the heater H, thereby controlling the phase of the current supply to the heater H. Here, in order to lower the air blowing resistance by heater H,
Since it is sufficient to reduce the number of turns, here, when the required power consumption is 1200W, we use a heater H with a power consumption specification of 1500W, which is made of a heater wire with the same cross-sectional area as the one for 1200W. This is to reduce the number of 0 turns. In order to use the heater H whose power consumption is 1500W selected in this way as 1200W, the above-mentioned power consumption limiting resistor R is used to reduce the difference in the W number in a steady state as shown in Fig. 2. In order to cut off a certain 300W, the phase of the heater H is controlled by the trigger element T and the switching element S so that the heater H is energized with a required phase angle cut out in advance.

【Effect of the invention】

As described above, in the present invention, since a heater with specifications larger than the rated power consumption and a small number of turns is used, it is possible to lower the air blowing resistance and improve the air blowing efficiency. Although a heater with specifications higher than the power consumption is used in order to energize the heater in a state where the heater is in the rated state, the power consumption is still the same as the rated power consumption.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of an embodiment of the present invention, Fig. 2 is a time chart showing the same operation as above, Figs. FIG. 6 is a circuit diagram of a conventional example, where H is a heater, S is a switching element, FS is a wind temperature sensor, and R is a power consumption limiting resistor. Agent Patent attorney Ishi 1) Chief 7H... Heater 1 Figure 8° Fig. 8 Diagram element FS... Air temperature sensor 2vIJ Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] (1) An air temperature sensor and a switching element connected in series to the heater control the phase of the heater according to the output of the air temperature sensor, and the heater has a specification larger than the rated power consumption and a small number of turns. A hair dryer characterized in that a power consumption limiting resistor is connected in series with an air temperature sensor, and the heater is controlled with the phase angle cut out in advance.