JPH0366335A - Hot air dryer and switching control method for discharge hot air in hot air dryer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention enables a sensor to detect this by holding a wet hand over a predetermined position after washing, and apply a voltage to an electric motor and a heater, and also The present invention relates to a hot air drying device that discharges warm air from a discharge port, and particularly relates to a hot air drying device that controls the rotational speed of the electric motor that drives a fan in a switchable manner, and a method for controlling the switching of hot air discharged in the hot air drying device. It is something.

[Conventional technology]

Conventionally, a commutator motor has been used as the fan drive motor for hot air drying equipment, and the hot air discharged is controlled by changing the phase or frequency of the current supplied to the motor and changing the rotation speed of the rotating magnetic field. It was in a structure that

[Problem to be solved by the invention]

Therefore, not only does the operating life of the motor itself become short due to mechanical wear of the commutator configured in the motor, but also the start-up time during discharge hot air switching operation is long due to the characteristics of the commutator motor itself, and the short time is short due to the nature of the device. It has the disadvantage that it is difficult to adapt to the hand drying equipment that is used.

The present invention was devised in view of the above-mentioned problems, and includes a hot air drying device that has a long operating life of the electric motor, and is capable of switching the hot air discharged in a short period of time, and a hot air drying device that can change the hot air discharged in the hot air drying device. The purpose of this invention is to provide a switching control method.

[Means to solve the problem]

In order to achieve the above object, a hot air drying device and a discharge hot air switching control method in the hot air drying device according to the present invention include:
In a hot air drying device where a sensor detects when a hand is placed over a predetermined position and drives a fan and a heater to discharge hot air to the predetermined position, the stator coil of the induction motor that drives the fan is activated. Two different numbers of coils are wound in parallel, and the two coils are switched and controlled by an external changeover switch to change the rotational speed of the rotating magnetic field and to control the intensity of the hot air discharged. ε
In particular, one of the coils is configured with two poles and the other with four poles, and the rotation speed is appropriately switched using an external changeover switch to control the strength of the hot air discharged. be.

[Effect]

Unlike a commutator motor, the above-mentioned multi-polar induction motor does not have a mechanical moving part, but rotates a rotor by utilizing electromagnetic mechanical effects in a so-called multi-polar induction coil. Therefore, shortening of operating life due to mechanical wear can be prevented.

In addition, since the multi-polar induction motor can switch the rotation speed of the rotating magnetic field in inverse proportion to the number of poles used,
The rotation speed can be changed by changing the number of poles used, for example from 2 poles to 4 poles, or from 4 poles to 2 poles, using an external changeover switch. Therefore, the amount of hot air discharged can be changed in a short time. It is possible to switch the intensity.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a hot air drying device and a method of controlling hot air discharged in the hot air drying device according to the present invention will be described with reference to the accompanying drawings.

The hot air drying device according to the present invention includes a hot air fan unit 2, a germicidal lamp unit 3, a sensor unit 4, a power switch 5, a changeover switch 6, a controller 7, and a terminal block 8 in a machine housing 1.
．． It houses and mounts various component devices such as 9 and so on.

The machine casing 1 has a hanging structure 10 and a plurality of screws 11.
Surface case 1a that can be separated and joined by 11...etc.
and a back case 1b, and in this embodiment, the machine housing 1 is formed by the electric motor 1 included in the hot air fan unit 2.
In order to accommodate the two parts, a warm air outlet 13 is formed which has a substantially semicircular shape, and below which an exhaust duct 17 (described later) of the hot air fan UNIATO 2 is positioned. The germicidal lamp unit 3 is fixed to the back case lb, and the sensor unit 4, the power switch 5, the changeover switch 6, the terminal blocks 8, 9 connected to the changeover switch 6, etc. are fixed to the inner surface of the back case lb. It is so arranged that it can be assembled by covering the front case 1a, which forms a housing space for the hot air fan unit 2 itself, from the outside of the front side.

In the hot air dryer according to this embodiment, the controller 7 is fixed to the outer surface of the blower case 14 that constitutes the hot air fan unit 2. However, the controller 7
need not necessarily be attached to the hot air fan unit 2 side, and may of course be configured to be attached to the front case la or back case lb side of the machine housing 1.

The blower case 14 forming the warm air fan unit 2 is formed by a front case 14a and a back case 14b that can be separated and joined by a plurality of screws 15, 15, etc., and has a ventilation duct 16 in the internal circumferential direction, and a ventilation duct 16 in the internal circumferential direction. ) 16 and is provided with an exhaust duct 17 that opens to the hot air outlet 13 of the machine casing 1, and a so-called sirocco type fan 18 is installed inside the ventilation duct 16, and inside the exhaust duct 17. Hee
- The electric motor 1 accommodates the fan 19 and the fan 18.
It is connected and fixed to the drive shaft 20 of No. 2. In addition, the exhaust duct 17 is formed separately as a lid 21 that can be opened/closed or detached from the lower end of the surface case 14a of the blower case 14, and is configured so that maintenance inspection or replacement of the heater 19 can be carried out as needed. It is. Above professional case 1
4 is a plurality of support arms 2 fixed to the outer periphery of the electric motor 12;
2, 22, . . . and a plurality of screws 23, 23, . 2
4 is a solid state relay fixed to the outer surface of the blower case 14 with a heat sink 25 interposed therebetween.

In the present invention, the electric motor 12 is constructed using a so-called induction motor, and two coils (not shown) having different numbers of poles, for example, a combination of two poles and four poles, are wound parallel to each other around a stator coil. In addition, the external changeover switch 6
For example, the number of poles used in the electric motor 12 can be changed from 2 to 4.
It is configured so that it can be switched from pole to pole, or from four poles to two poles, and as mentioned above, the rotation speed of the motor 12 is inversely proportional to the usage limit, so the rotation speed of the motor 12 can be changed by two. It is possible to change it to 1 or 2 times. As a result, it can be used as a powerful hot air drying mode when rotating at high speed, and as a silent hot air drying mode when rotating at low speed.

The sensor unit 4 is an optical sensor that is fixed near the hot air outlet 13 of the machine casing 1 and includes a light-emitting element and a light-receiving element directed downward at a predetermined position. The controller 7 is configured to detect a hand held below the warm air outlet 13 and send a hand detection signal to the controller 7 mounted inside the machine housing 1.

Furthermore, when the light receiving/emitting element of the sensor unit 4 detects a hand, the controller 7 maintains the electric motor 12 and the heater 19 in a energized state based on the output signal thereof, and applies a voltage from the power source. This energization causes the motor 12 to rotate, and the ventilation generated by the fan 18 passes through the heater 19, is heated by the heater 19, and is discharged from the exhaust duct 17 through the hot air outlet 13. Spray on your hand held over A to evaporate and dry the moisture.

[Effects of the Invention] As described above, the hot air drying device and the method for controlling discharged hot air in the hot air drying device according to the present invention can be applied to the hot air drying device in the multipolar induction coil. By using an induction motor configured to rotate the rotor using the magneto-mechanical effect,
There are no mechanical moving parts, which prevents shortening of operating life due to wear. In addition, since there is no mechanical moving part, the number of poles used can be changed using an external changeover switch, and the hot air discharged can be changed by changing the rotational speed in a short time. The effects of implementation are extremely large.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing an embodiment of the hot air drying device according to the present invention, Fig. 2 is a front view with the front case of the machine housing removed, Fig. 3 is a partially cutaway side view, and Fig. 3 is a partially cutaway side view. FIG. 4 is an exploded perspective view showing the structure of the warm air fan unit, FIG. 5 is a partially cutaway front view of the warm air fan unit, and FIG. 6 is a partially cutaway side view of the warm air fan unit. 1... Machine casing 4... Sensor unit 13... Hot air outlet

Claims (3)

[Claims] (1) In a hot air drying device in which a sensor detects when a hand is placed over a predetermined position and drives a fan and a heater to discharge warm air to the predetermined position, the stator of the induction motor that drives the fan. Two coils with different numbers of poles are wound in parallel, and the two coils are switched and selected by an external changeover switch to change the rotational speed of the rotating magnetic field and control the intensity of the hot air discharged. A hot air drying device characterized by the following configuration. (2) The hot air drying device according to claim 1, wherein one coil has two poles and the other coil has four poles. (3) A method for controlling discharged hot air in a hot air dryer configured to selectively control the number of poles used in an electric motor that rotates a fan using an external changeover switch to switch the strength of discharged hot air.