JPS6138710Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improved structure of a humidifier using a vibrator.

In this type of humidifier, a vibrator is inserted and connected to an oscillation drive circuit, and a humidity controller and a variable resistor are connected in series to the base of a transistor for oscillation drive in this circuit, which opens and closes contacts depending on the humidity. However, during humidification, the vibration amplitude of the vibrator is adjusted by such a variable resistor to change the amount of humidification, and when the humidity is appropriate, the humidity controller is opened and the drive of the vibrator is stopped. On the other hand, like the centrifugal spray type, this type of ultrasonic humidifier generates a visible mist when activated, but unlike the centrifugal spray type, which generates fog at the same time as the air is blown,
If only the drive circuit operates, fog will be generated, so when the humidity controller is opened, only air will be blown and no fog will be generated. That is, if fog is not generated even when air is being blown, the user may be concerned that the device may be malfunctioning. The present invention was developed to eliminate such concerns, and examples thereof will be described below with reference to the drawings.

1 is a power supply converted to direct current, 2 is an NPN type transistor as an oscillation driving element, 3 is a piezoelectric vibrator connected between the base and collector of transistor 2, and 4 is connected between the collector and emitter of transistor 2. the first capacitor for matching;
5 is a large-capacity second capacitor for charging and discharging connected between the base and emitter of transistor 2; 6 is a choke coil connected between the collector of transistor 2 and power source 1;

7 is the first resistor connected between the base and emitter of transistor 2, 8 is power supply 1 and transistor 2
This is an output adjustment circuit that adjusts the output of the transistor 2 connected between the bases of the transistor 2. Here, this output adjustment circuit 8 is a circuit in which a series circuit of a humidity regulator 10 having a second resistor 9 and a switching contact and a third resistor 11 are connected in parallel.

Thus, when the transistor 2 is non-conducting, as the current passing through the chiyoke coil 6 and the piezoelectric vibrator 3 accumulates charge in the second capacitor 5, the transistor 2 moves to the active region, and feedback is activated to lower the collector potential of the transistor. saturate 2.
As a result, the charge in the second capacitor 5 is discharged to the collector of the transistor 2 via the piezoelectric vibrator 3, lowering the base potential and returning the transistor 2 to a non-conducting state, and thereafter the transistor 2 repeats the above state. , the piezoelectric vibrator 3 vibrates to generate fog.

During this time, the first resistor 7 temporarily defines the base potential of the transistor 2, but this potential changes depending on the values of the second and third resistors 9 and 11 in the output adjustment circuit 8. In this embodiment, the value of the second resistor 9 is small, and the value of the third resistor 11 is large.
Therefore, when the humidity is lower than the set value, the humidity controller 1
0 is closed, the combined resistance value in the output adjustment circuit 8 is small, so the base potential of the transistor 2 is large, and the vibration amplitude of the vibrator 3 is also large, but the humidity is higher than the set value. Humidity regulator 10
When is open, the resistance value of the third resistor 11 is large, so the base potential of the transistor 2 is small and the amplitude of the vibrator 3 is small. In the latter case, the vibrator 3 generates a small amount of mist that hardly contributes to the humidification effect and is barely visible due to small-amplitude vibrations, thereby informing the user that it is operating normally. .

Thus, the ultrasonic humidifier of the present invention comprises a vibrator that atomizes water by vibration, an oscillation drive element that drives the vibrator to oscillate, a humidity regulator, and an output adjustment circuit which adjusts the output of the oscillation drive element so that the vibrator vibrates with a small amplitude when the humidity is above the set humidity level of the humidity regulator. Therefore, even if the humidity level exceeds the set value and the humidity regulator is activated, mist will still be produced, and it is possible to display to the user that the humidifier is operating normally.

[Brief explanation of the drawing]

The figure is an electrical circuit diagram of an ultrasonic humidifier according to the present invention. 3... Piezoelectric vibrator, 7... First resistor, 9... Second resistor, 10... Humidity controller, 11... Third resistor.

Claims (1)

[Scope of utility model registration request] A vibrator that atomizes water by vibration, an oscillation drive element that drives the vibrator to oscillate, a humidity controller, and the vibrator that controls the output of the oscillation drive element when the humidity is higher than the set humidity of the humidity controller. An ultrasonic humidifier characterized by being equipped with an output adjustment circuit that adjusts the vibration to have a small amplitude.