High speed freezing system

Details High speed freezing system High speed freezing system

1977-06-17

1978-08-01

Capossela, Ronald C.

Refrigeration

Processes

Treating an article

62225, 62266, 62381, F25D 1302

Patent

active

041035070

ABSTRACT:
A fast-freeze system comprises an insulating housing for a product conveyor of the vertical helix or spiral-type wherein the upper and lower loops (or tiers) respectively, of the helix discharge or receive the product, as the case may be, at product openings (or ports) in the housing; a multiple-spray nozzle array on a header receives a regulated supply of liquid nitrogen according to a preset freezing temperature through a modulating servo-valve control; the header subtends a restricted sector only of an upper conveyor tier for producing heat transfer by direct liquid nitrogen-to-product contact to establish a single very cold zone substantially in advance of the discharge port, and the exhaust nitrogen vapor is discharged by blower action through the product entrance port.

REFERENCES:
patent: 2140744 (1938-12-01), Hirsch
patent: 3027355 (1962-03-01), Taul et al.
patent: 3298188 (1967-01-01), Webster et al.
patent: 3412573 (1968-11-01), Pauliukonis
patent: 3845635 (1974-05-01), Perkins et al.
patent: 3866432 (1975-02-01), Harrison

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