Cryogenic tunnel freezer

F - Mech Eng,Light,Heat,Weapons – 25 – D

Patent

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F25D 13/06 (2006.01) F25D 17/02 (2006.01) F25D 25/04 (2006.01)

Patent

CA 2718263

A cryogenic tunnel freezer (10) having modular design and construction including a lower section (16) that can be raised and lowered relative to an upper section (14), the upper and lower sections (14, 16) defining a tunnel (12) when the lower section (16) is in a closed (raised) position. Product is moved through the tunnel (12) via a belt (22) formed of arrays of plastic modules (76) that are reinforced by metal chains (140) and rods (150). The lower run (23) of the belt (22) rides on the floor (48) of the lower section (16) and the upper run (21) rides on the lower run (23) when the belt (22) is operated. The flow of cryogenic fluid through the tunnel (12) is aided by vaporization of a cryogenic fluid and baffles (98), but no air-moving devices located within the tunnel (12).

La présente invention concerne un congélateur à tunnel cryogénique (10) de conception et de construction modulaires, comprenant une section inférieure (16) qui peut être levée ou abaissée par rapport à une section supérieure (14), les sections supérieure et inférieure (14, 16) définissant un tunnel (12) lorsque la section inférieure (16) se trouve en position fermée (levée). Le produit est déplacé à travers le tunnel (12) via une courroie (22) formée densembles de modules en plastique (76) qui sont renforcés par des chaînes (140) et des tiges (150) de métal. La course inférieure (23) de la courroie (22) sétend sur le plancher (48) de la section inférieure (16), et la course supérieure (21) sétend sur la course inférieure (23) lorsque la courroie (22) est en fonctionnement. L'écoulement du fluide cryogénique à travers le tunnel (12) est aidé par la vaporisation d'un fluide cryogénique et par des déflecteurs (98), sans que des dispositifs de ventilation ne soient placés dans le tunnel (12).

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