Device for ultrasonic atomizing of liquid media

 

(57) Abstract:

The invention relates to ultrasonic technologies in heterogeneous environments and can be used for spraying liquids. The problem solved by the invention is to create an efficient and simple device for ultrasonic atomizing of liquid media. The problem is solved by using as the base of the oscillating circuit in the positive feedback circuit of the generator and set the frequency of its oscillations of the piezoelectric element of the evaporator the liquid in acoustic contact with the sprayed liquid. 2 Il.

The invention relates to ultrasonic technologies in heterogeneous environments and can find application in everyday life and in scientific research in the chemical, petrochemical, and pharmaceutical industries for spraying liquids.

The task of spraying liquid media usually solved by finding the optimal shape of the tank atomizer and imposing additional impacts, such as[1], [2], [3]. These devices are complicated to manufacture and are not efficient enough.

Closest to the present invention is a device that implements the method according to and. C. N Lu, containing piezoelectric element. To improve the efficiency of the spraying frequency generator sequentially change.

The disadvantage of this device is:

- the presence of additional elements for regulating the oscillation frequency of the oscillator;

the absence of feedback with the process of atomization of the liquid.

The problem solved by the invention is to create an efficient and simple device for ultrasonic atomizing of liquid media.

The problem is solved by using as the base of the oscillating circuit in the positive feedback circuit of the generator and set the frequency of its oscillations of the piezoelectric element of the evaporator the liquid in acoustic contact with the sprayed liquid.

It is known [5] that the processes in heterogeneous systems (e.g., the sprayed liquid / surface evaporator) accompanied by the appearance of the surface microstructure, which correspond to the characteristic acoustic resonant frequency. The processes associated with emergent spraying (desired) components of a fluid macrostructure, change the acoustic characteristics of the surface of piezos the AMB as associated electrical oscillating circuit with changing the total resonance characteristic, depending on the process.

The essence of the invention lies in the fact that the device for ultrasonic atomizing of liquid media, comprising a generator of electrical oscillations comprising an amplifying element and the base of the oscillating circuit is connected by a chain of positive feedback, and the evaporator liquid with a piezoelectric element, which is in acoustic contact with the evaporated liquid; as the base of the oscillating oscillator circuit using the piezo evaporator liquid, while the sprayed liquid is considered as an acoustic resonant circuit with characteristics that depend on the current processes, and the electric oscillation generator set joint resonance characteristics of two connected electric circuits: intrinsic piezoelectric evaporator and the equivalent electrical circuit, relevant pezopreobrazovatelem acoustic oscillatory circuit characterizing the spray.

In this technical solution, the basic resonant circuit - piezo evaporative system, and the sprayed liquid (reaction medium, considered as acoustic resonant circuit) form Spasskie characteristics, and the second (the spray) has acoustic characteristics that depend on the current process. With this design, the control of the generator is a positive feedback loop, amplifying the signals characterizing the effect desired processes (namely, the preferential sputtering of the desired components of the liquid in the spray liquid on the General characteristics associated oscillator circuits. This configuration is common resonant characteristics of the device allows you to work on the characteristic frequencies of the spraying of the desired components of the solution.

The described device is simple in execution, eliminating the need for frequency control, and now, since the generator is automatically set to the optimal mode of oscillation for the resonant acceleration of the process of spraying the desired fluid components.

The device explained in Fig.1, where 1 is the amplifying element generator, 2 - piezo evaporative system in the positive feedback loop 3, used as a basic oscillating circuit that sets the frequency of the oscillation generator, 4 - sprayed liquid, which is in acoustic contact with pesole is 2">

The device operates as follows. When the power in the generator, consisting of elements 1 and 2, connected back to the positive connection 3, there are oscillations. Electrical oscillations are converted in the piezoelectric element 2 in a standing acoustic wave, which affects the environment (liquid) 4. In the liquid 4 under the influence of the acoustic impact of the piezoelectric element 2 occurs the spraying liquid, followed by the appearance of the surface microstructure, which correspond to the characteristic acoustic resonant frequency. The processes associated with emergent spraying (desired) components of a fluid macrostructure, change the acoustic characteristics of the surface of the piezoelectric element at a characteristic resonant frequencies. The control generator is a positive feedback loop 3, amplifying the signals characterizing the impact of the desired processes in the sprayed liquid 4 on the General characteristics associated oscillator circuits.

For example, a device based on these principles, the authors used for spraying essential oils of medicinal plants. Ultrafine aerosols oils obtained in this way, obl, General view of the device shown in photo 2), designed and manufactured LLP View, Novosibirsk, has significantly expand the scope of medical applications of essential oils of medicinal plants. The operation of the device at frequencies megahertz range at densities ultrasonic active power of about 1 W/cm2allows you to retrieve aerosols with a diameter of drops less than 0.5 μm. It is experimentally shown the high effectiveness of the sanitizing action of the device [6], [7]. The use of fine aerosols produced from purified essential oils, and directly from the living tissues of medicinal plants by the method of resonant high-frequency ultrasonic sublimation greatly extends the range of therapeutic effects of medicinal plants, allowing lead to General quarters in accordance with the requirements of GOST for inpatient operating.

Bibliography

1. A. S. N 929240, B. I. N 19, 1982, CL B 05, gr. B 17/06.

2. A. S. N 929242, B. I. N 19, 1982, CL B 05, gr. B 17/06.

3. A. S. N 978934, B. I. N 45, 1982, CL B 05, gr. B 17/06.

4. A. S. N 460072. B. I. N 6. 1975, class B 05, gr. B 17/06.

5. Chemical Physics Letters. Volume 191, number 5, 1992: "Observation of surface acoustic phonon resonances: application to the CO+O2
7. "Medical technology". No. 1-2, 1995, Medical news Agency, St. Petersburg. The use of essential oils for the prevention of nosocomial infections and the treatment of candidiasis; Kazarinov N. In., Muzychenko, L. M. , Tkachenko, K., Surguja A. M., Brezhnev C. N., Usov, O. M.

Device for ultrasonic atomizing of liquid media, comprising a generator of electrical oscillations, consisting of the amplifying element and the base of the oscillating circuit is connected by a chain of positive feedback, and the evaporator liquid with a piezoelectric element, which is in acoustic contact with the evaporated liquid, characterized in that as the base of the oscillating circuit of the generator is used piezo evaporator liquid, forming a sprayable liquid associated oscillatory circuits, the joint resonance characteristic which sets the mode of the oscillation generator.

 

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