ES345436A1 - Improvements in the construction of criogen freezers for freezing of products. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

"Improvements in the construction of cryogenic freezers for the ultrafast freezing of products", characterized in that an isolated, elongated and horizontal tunnel is provided, a conveyor having at least a portion that extends inside said tunnel to transport a product by said tunnel, means placed in said tunnel, below the entrance of the tunnel to contact said food product with a cryogenic liquid, whereby said product is frozen, and substantially all said liquid is vaporized to form a refrigerant gas horizontal divisions in said tunnel extending longitudinally dividing said tunnel into a first and a second upper gas recirculation duct and a first and a second lower gas contact duct produced, said first gas recirculation and contact ducts gas produced form a first gas recirculation path and are designed to adjacent to said tunnel inlet, said second gas recirculation and gas contacting conduits produced form a second gas recirculation path and are intermediate to said first gas recirculation path and said cryogenic liquid contact means, a first and a second blower in said tunnel having their admissions in communication with the first and second gas contact conduits produced, respectively, and their discharge ends in communication with the first and second gas recirculation conduits, respectively, a third conduit in communication with said first and said second gas contact conduit produced, for conveying a certain portion of the refrigerant gas from the second gas recirculation path to the first gas recirculation path, a fourth conduit for extracting some portion of the refrigerant gas recirculated from the first gas recirculation path, and a control means of luxury in said fourth conduit to control the amount of gas extracted from said first gas recirculation path. (Machine-translation by Google Translate, not legally binding)