FLUID BED CRYO-FREEZING DEVICE Russian patent published in 2010 - IPC A23L3/375 F25D3/10 

FIELD: medicine.

SUBSTANCE: invention is to be used in pharmaceutical, medical and biological, food and other industries in cryo-freezing of vegetable piece raw materials, e.g., berries, diced vegetables and mushrooms. A cryo-freezing device comprises a cylindrical chamber with a gas grid, a raw material loading system, containing a bunker for supplying the raw material, a blade feeder and pipelines connecting the bunker with the feeder and the feeder with the chamber, and a ready frozen product unloading system. A reservoir with liquid nitrogen bears the cylindrical chamber. Its interior comprises a gas distributor mounted. It is connected to a steam collector of a gas nitrogen recirculation system. Said system and a fan are used to generate the required fluidisation of a gas nitrogen head. A liquid nitrogen dosed supply system provides a continuity of the cryo-freezing process.

EFFECT: invention allows making a high-quality product that preserves the most biologically active elements, implementing energy supply saving technology due to effective heat utilisation of gas nitrogen along the whole height of a suspended layer.

1 dwg