DE947156C - Process for the production of aerosols - Google Patents

Description

Process for the production of aerosols It is known to be liquids to atomize with the help of ultrasonic vibrations. This is usually done Oscillating crystals are used, mostly with a frequency in the range of a few rookHz work. Such quartz oscillators are difficult to manufacture and accordingly expensive. Furthermore, their performance is relatively low, so that for that reason alone are not very suitable for industrial use. In particular for the production of Aerosols, i.e. for atomizing liquids, based on the unit area, relatively large performances are required in order to achieve as large a unit of time as possible To atomize amount of liquid and to atomize the liquid also largely finely.

It has already been proposed for the atomization of liquids Liquid whistles, e.g. B. in the manner of the well-known Galton pipe, or other by To use nozzle effect ultrasonic vibrations generating devices through which the liquid to be atomized is pressed under high pressure. These devices also show excellent effect on the item to be treated and are in some cases also proportionate easy to manufacture.

However, here too it is felt to be a disadvantage that - apart from the risk of vibrations occurring during ultrasound treatment Clogging - their throughput is low in relation to the effort required is.

Up until now it was generally of the opinion that it was precisely in favor of atomizing low frequencies of liquids would not be suitable and that a really fine atomization only with great power, the sounders very high frequency is taken, is attainable. In contrast this is where the invention is based on the knowledge that the opposite path has to be followed, for one to achieve good atomization economically, and that this is preferably done with frequencies on the order of 50 to 500 Hz are to be used.

Unbalance vibrators in particular are used to generate such frequencies and electromagnetic vibrators, such as those used for other purposes, for compaction of cast concrete, for shaking sieves and also for the production of emulsions and other mixtures, known or proposed. For the present The purpose, however, is the new application and leads to surprisingly favorable results, both in terms of the resulting aerosol and in terms of their efficiency.

According to a further development of the inventive concept, it is special advantageous to simultaneously apply at least two oscillators to the item to be treated to bring shifted oscillation cycle to effect. This is in the good a particularly high acceleration is achieved, which is necessary for the detachment of particularly fine droplets of the liquid to be atomized and thus for the production of a particularly fine one Aerosol leads.

In order to use the transducer, for example an electromagnetic one Schwinger, to protect against the liquid mist, it is advantageous to use the same to be sealed liquid-tight.

A vibrator, for example, can be used to atomize liquids can be used with a plate-shaped oscillating armature onto which the liquid is instilled, for example water as a liquid in air conditioning systems is atomized to increase the humidity.

Claims (2)

PATENT CLAIMS: I. Process for the production of aerosols by Atomization of liquids by means of sonic treatment, characterized in that low-frequency mechanical vibrations from 50 to 500 Hz are used. 2. The method according to claim I, characterized in that at least two oscillators with a time-shifted oscillation cycle simultaneously on the item to be treated be brought to action. Publications considered: Swiss patent specification No. 2II9I6; British Patent No. 5I6 34I; German patent specification No. 7I2 64I; Aigner, "Die Unterwasserschalltechnik", Berlin I922, p. I98.