Ultrasonic atomizer production circuit diagram

　　Ultrasonic humidifier (ultrasonic atomizer) uses ultrasonic transducer to generate high-frequency vibration to atomize the water surface. During the atomization process, water mist is generated and continuously evaporates to the surroundings to maintain a certain humidity in the air.

　　See the circuit diagram below: QA, L2, C1, L1, C3, C2, R1, U and WR1 form a high-power high-frequency oscillator, which uses a capacitor three-point oscillation circuit. The oscillation frequency of the circuit is the natural frequency of the ultrasonic piezoelectric transducer vibrator U, 1.013MHz. The resonant circuit composed of L2 and C1 does not determine the oscillator frequency here, but determines the oscillation amplitude. Its resonant frequency is lower than the oscillation frequency of the circuit. The resonant frequency of L1 and C3 is greater than the oscillation frequency of the circuit. The two resonant circuits are used to synthesize the oscillation frequency of the circuit so that the oscillator can work stably under high power.

　　The transistor uses 13009 plus a heat sink, R1 and WR1 are bias resistors, adjust WR1 to make the oscillator output moderate, and make sure the circuit has started to oscillate. Here A is the ammeter, and the current of the entire circuit is determined to be around 0.4A, then the circuit can be debugged.

　　Fix the atomizing sprinkler head at the bottom of the basin, and the water depth should be 6-10cm. Adjust the potentiometer WR1, and first turn the potentiometer to the maximum resistance. Turn on the power, slowly reduce the resistance of WR1, and observe the current meter and the water spraying situation until the water mist is the highest and the amount of mist is the largest, and the current is the smallest. Replace the potentiometer WR1 with a resistor of the same resistance, and the first step of debugging is completed.

　　Then start the second step of adjustment! Knock the shortwave magnetic bar into magnetic blocks of different sizes, put them into the frame of L2, and after repeatedly selecting magnetic blocks of different sizes, carefully observe the new situation of the ammeter and water spray! At this time, the water mist should be higher and larger than before, while the current is smaller than before, and the temperature of the triode is lower. Finally, fix the magnetic block in the frame of L2. If there is a new debugging method, we will update the technical information here on the electronic production network.

　　Component selection and production C1, C2, C3 use high-frequency ceramic capacitors with a voltage of 630V. The transistor requires a power of 60W and a reverse voltage greater than 300V.