DEVICE FOR NON-CONTACT ACOUSTIC DRYING OF MATERIALS Russian patent published in 2023 - IPC F26B9/06 F26B5/02 

FIELD: technology.

SUBSTANCE: invention relates to the implementation of processes for drying various materials using acoustic vibrations and can be used in the pharmaceutical, chemical and biological industries, as well as in the processing of agricultural products without raising the temperature and destroying the structure of products and substances. The device for non-contact acoustic drying of materials comprises an acoustic emitter, a drying chamber installed coaxially with it, an acoustic absorber is installed in the drying chamber opposite to the emitter, whereas a mesodimensional cuboid plate acoustic lens with a rib size of at least λ is installed at the outlet of the acoustic emitter, where λ is wavelength of radiation in the surrounding space of the lens composed of a lattice of parallel V-shaped plates with a full opening angleα in the range of more than 65 and less than 120 degrees to the incident radiation, with a distance between the plates no more than λ/2 and creating an area of increased intensity of the acoustic field on the drying material with a length from the shadow surface of the lens up to 5λ and with a subwavelength transverse size.

EFFECT: increased intensity of acoustic radiation on the drying material without increasing the power of the radiation source.

2 cl, 2 dwg