The author describes a multi-purpose ultrasonic atomizer. The atomizer has the following features: Split, the ultrasonic spray head and some completely separate power supply and the circuit; portable, small size, plug and play, with self-protection function; high reliability, can work around the clock; spray volume large, and the villa landscape bonsai can occur misty supporting dynamic; particularly suitable for dry conditions over the air humidification to Win breathing; the water by adding an appropriate amount of a solvent, to the disinfection of contaminated living environment to prevent diseases (such as the life time spray with vinegar, can prevent influenza); nebulizer (finished) low price, cost-effective, like homemade nebulizer, only the costs of equipment and working hours also face of the above price.
First, the circuit works

The nebulizer circuit shown in Figure 1, the power through the transformer B (AC220V/30W) Buck (36V) to send rectifier D1-D4 and C5, C6 filtering to provide operating voltage to the circuit. Atomizer operating circuit by the oscillator, the transducer and the water level control circuit.
1. Oscillator and transducer oscillator circuit is a high-frequency piezoelectric ceramics by the TD (ultrasonic transducer) work consisting of oscillator, the oscillation frequency of 1.65MHz (depends on the selected TD). Transistor BG1 and capacitors C1, C2 and so constitute a capacitance three-point oscillator circuit. C1 and inductor L1 equivalent parallel resonant frequency than the operating frequency is low, its role is to determine the magnitude of the work of the oscillator; C2 and inductor L2 equivalent series resonant frequency than high frequency, its role is to determine the work of the feedback oscillator amount to ensure that the oscillator start-up and maintenance of a reliable oscillation circuit. TD has great piezoelectric equivalent inductance, which in addition determine the operating frequency of the circuit, the same time, the workload is the atomizer. If the replacement of piezoelectric ceramics TD, no other parameters to adjust the circuit, the oscillator frequency can also automatically track the new frequency of piezoelectric ceramics to work.
2. Water level control and bias circuits circuit transducer TD (also known as spray head) and its water level control on the installation of two stylus, they are immersed in shallow water solution work. If long-term atomization, lower surface leaving spray when the water level control stylus head above water, the oscillator will automatically stop working, it also avoids heat damage due to spray head.
Figure 1 circuit BG2, BG3 tubes, stylus A, B and related resistance, a common component level control circuit. Circuit, the power through contact pins A, B, and solution to provide power to the emitter BG3. BG3 tube conduction work. BG2 control switch from the role. When the work BG3, BG2 is also conducting tube, power supply by BG3, BG2, R3, L3 BG1 tube to provide bias current to enable oscillation BG1 tube. Once the liquid reduce, control, stylus out of the water, the power to control the access is cut off BG3, BG3 tube cut-off, BG2 switches are off, this time because no bias current BG1 quickly to stop oscillation. Adjusting the resistance of resistor R3, can change the BG1 tube bias current, so the oscillator is very simple and convenient debugging. D7 is the BG1 circuit protection diode junction tube be.
Second, the structure and the use of ultrasonic atomizer method
1. Atomizer structure, shape of the atomizer shown in Figure 2. Spray head shell is brass castings, copper, polished chrome plated shell, the external dimensions of 442mm × l5mm, copper shell package with transducer (piezoelectric film of nickel or titanium high-frequency) and power management BG1, transducer device close to the BG1 tube to facilitate heat dissipation in the solution work. Casting copper shell is removable, just rotate the positioning of the surface shell mouth, you can replace the piezoelectric film. In addition two water level control stylus secured to the copper shell, and then arranged according to the vertical distance outside shell out a certain height in order to control the spray solution, the lowest level.
Atomizer power supply and operating circuit is individually packed in a plastic shell, when the device into the power input, the output will lead to the spray head through the power supply. Alleged that the nebulizer manufacturers, not only to provide nebulizer products, also provides a full set of parts for sale.
2, using the method, if the nebulizer humidifier for indoor or disinfected, can prepare a small plastic basin, the basin Sheng certain amount of solution, the solution should not be too much volume (shallow water standard), only higher than the level of probe to a certain distance (the spray solution is relatively reduced too). Then spray head flat, two stylus up immersed in the solution, then just plug in the power, the solution immediately began to spray. If the spray is used for bonsai, be guided by the above methods.