Liha töötlemine
Contact Freezing Methods
Systems range from the most basic, in which
a fan draws air through a refrigerated coil and Contact freezing methods are based on heat
blows the cooled air around an insulated transfer by contact between products and
room, to purpose-built conveyerized blast metal surfaces (which in turn are cooled by
freezing tunnels or spirals. In a continuous either primary or secondary refrigerants) or
system, meat is conveyed through a freezing direct immersion in a refrigerated liquid.
tunnel or refrigerated room, usually by an Modern plate cooling systems differ little
overhead conveyor or on a belt. This over- in principle from the first contact freezer
Freezing/Thawing 113
patented in 1929 by Clarence Birdseye. liquid ice
annaabi.ee 
