Carbon dioxide snow hood with J-horn

Details Carbon dioxide snow hood with J-horn Carbon dioxide snow hood with J-horn

1980-09-18

1981-09-08

Yudkoff, Norman

Refrigeration

Processes

Circulating external gas

62 35, 55461, F25J 100

Patent

active

042877199

ABSTRACT:
A compact, high-efficiency, J-tube carbon dioxide snow hood has a novel diffuser at the discharge end of the J-tube for providing a well-confined, concentrated snow deposit at a reduced exit velocity. The diffuser includes a pair of juxtaposed, axially upright cylindrical baffles which intercept the fine-particle snow discharge from the J-tube in a manner to create counterswirling currents of carbon dioxide snow. An upright cylindrical tube circumscribing the cylindrical baffles, and depending substantially beyond the lower ends of the baffles, forms a mixing chamber where the segregated counterswirling currents of carbon dioxide snow interact to form desired larger-particle snow which is then passed from the chamber in a confined, low velocity, downwardly directly discharge. The vapor discharge from the J-tube is directed through an exhaust duct in the side wall of the snow hood such that carbon dioxide vapor in the discharge from the mixing chamber is removed by aspiration as is the vapor formed by sublimation of the snow beneath the hood.

REFERENCES:
patent: 2486624 (1949-11-01), Williamson
patent: 3757367 (1973-09-01), Campbell
patent: 3807187 (1974-04-01), Vorel
patent: 4166364 (1979-09-01), Ruprecht et al.

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