METHOD FOR REFRIGERATION TREATMENT OF FOOD PRODUCTS Russian patent published in 1997 - IPC

FIELD: refrigeration equipment, in particular, cooling and freezing of food products. SUBSTANCE: method involves providing simultaneous treatment of food products with cooling air medium and exposing to acoustic oscillations generated by acoustic source with frequency approximating food product oscillation frequency ranging from 10² ... 10⁴ Hz and acoustic pressure intensity of 70-140 dB to create acoustic field of natural frequencies and residual spatial resonance field in freezing chamber. Food products are treated with cooling medium and exposed to acoustic oscillations directly upon delivery of food products into freezing chamber. EFFECT: increased efficiency, simplified method and improved quality of food products. 2 cl, 2 dwg