Control system for a humidifier

Details Control system for a humidifier Control system for a humidifier

2000-10-30

2002-10-08

Paik, Sang (Department: 3742)

Electric heating

Heating devices

With power supply and voltage or current regulation or...

C261S142000

Reexamination Certificate

active

06462314

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates to a control system for a humidifier, particularly to one having a variable resistor with an on/off switch function for turning on and off a supersonic oscillator so as to lower the cost of a humidifier.
A known conventional control system for a humidifier shown in
FIGS. 1 and 2
, includes an AC input terminal, an interactive switch SW consisting of a variable resistor VR and a silver contact point, a neon lamp L and an AC fan F for heat dispersing connected in parallel to the interactive switch SW, a transformer T for lowering the voltage, a bridge rectifier B
1
for changing AC into DC, two resistors R
1
, R
2
connected in parallel to the input and the output
1
and
2
of the bridge rectifier B
1
, a contact point
3
between the two resistors R
1
, R
2
connected to one end of the variable resistor VR, two inductance coils L
1
, L
2
and the base of a transistor Q
1
connected in series to the variable resistor VR. Further, an ultrasonic oscillator circuit provided between the inductance coil L
1
and L
2
and consisting of a capacitor C
1
and an ultrasonic oscillator H., and a capacitor C
2
connected between the capacitor C
1
and the ultrasonic oscillator H to divide current. Then the emitter
5
of the transistor Q
1
is connected to another inductance coil L
3
, and a diode D
1
is connected between the emitter
5
and the inductance coil L
3
to divide the current, and a capacitor C
3
is connected to the end of the circuit of the control system.
The known conventional control system for a humidifier consists the switch SW and the silver contact point to function as a general switch for the control system for a humidifier. So the conventional control system for a humidifier has a disadvantage of high cost.
SUMMARY OF THE INVENTION
The objective of the invention is to offer a control system for a humidifier of a lower cost than that of the conventional ones.
One feature of the invention is a variable resistor used in the control system also having on/off function, enabling the control system more quickly operated.
Another feature of the invention is a DC fan used instead of an AC fan for dispersing heat to lower the cost of the control system.


REFERENCES:
patent: 3989042 (1976-11-01), Mitsui et al.
patent: 4479106 (1984-10-01), Shimizu et al.
patent: 4563313 (1986-01-01), Tsuaki
patent: 4643351 (1987-02-01), Fukamachi et al.
patent: 4820453 (1989-04-01), Huang
patent: 5939973 (1999-08-01), Imamura

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