Refrigeration – Processes – Circulating external gas
Patent
1974-11-13
1976-01-13
O'Dea, William F.
Refrigeration
Processes
Circulating external gas
62 63, 62 76, F25J 100
Patent
active
039321550
ABSTRACT:
Methods for providing an expendable refrigerant which is emitted from a snow horn at a low velocity thereby enabling snow agglomeration at a close proximity to the horn exit and accurately delivering a charge of snow with minimum vapor loss. The desired snow is produced by introduction of the relatively warm liquid refrigerant into an insulated compartment and in heat exchange relation with a tube therein having a plurality of length/diameter ratios. The liquid refrigerant is effective to warm the tube walls and results in a slight cooling of such liquid which is then passed to a sub-cooler and returned to the tube inlet for expansion in several stages therein to form the snow. The product snow is emitted from this horn at a relatively low velocity and may be accurately directed into cavities of such products as eviscerated fowl. In automated systems, a plurality of horns may be selectively operated to inject snow into a plurality of food products or alternately, such horns may be operated intermittently to deposit a blanket of snow over food products to be chilled or a continuous ribbon of snow atop products on a moving conveyor.
REFERENCES:
patent: 1818816 (1931-08-01), Rufener et al.
patent: 2038592 (1936-04-01), Morris
patent: 2314317 (1943-03-01), Walter
patent: 3435632 (1969-04-01), Fallin
patent: 3492829 (1970-02-01), Stanford, Jr.
Minard Michael E.
Ozmec Gordon J.
Pietrucha Victor F.
Airco, Inc.
Bopp Edmund W.
Capossela Ronald C.
Mathews H. Hume
O'Dea William F.
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