Refrigeration – Processes – Treating an article
Patent
1983-10-18
1986-03-18
Capossela, Ronald C.
Refrigeration
Processes
Treating an article
62161, 62239, 62514R, F25D 1702
Patent
active
045760101
ABSTRACT:
Three tanks containing cryogenic fluid coolant are mounted inside the insulated compartment of a refrigeration container. A control system releases coolant into the compartment responsive to changes in the compartment temperature relative to maximum and minimum temperatures. When the compartment temperature is below the minimum temperature, no cooling of the compartment is desired, and the controller vents all excess boil off vapor outside the compartment. When the compartment temperature is above the maximum temperature, substantial cooling is required, and the controller releases vaporized coolant liquid into the compartment. When the compartment temperature is between the maximum and minimum temperatures, some minimal cooling is needed, and the controller flows the excess boil off vapor into the compartment instead of venting it outside. The coolant is released into the compartment through a venturi to circulate the compartment gases. Special valves and venturi permit operation of the system for more than a year without recharging a standard 12 volt DC battery.
REFERENCES:
patent: 2479840 (1949-08-01), Johnson et al.
patent: 2479867 (1949-08-01), Rosebaugh
patent: 3127755 (1964-04-01), Hemery
patent: 3269133 (1969-08-01), Dixon
patent: 3287925 (1966-11-01), Kane et al.
patent: 3385073 (1968-05-01), Snelling
patent: 4058384 (1977-11-01), Keefe
patent: 4060400 (1977-11-01), Williams
patent: 4373344 (1983-02-01), Hinn
patent: 4399658 (1983-08-01), Nielsen
Capossela Ronald C.
Coffee Wendell
Nhy-temp, Inc.
Smith Montgomery W.
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