F - Mech Eng,Light,Heat,Weapons – 25 – J
Patent
F - Mech Eng,Light,Heat,Weapons
25
J
F25J 3/04 (2006.01) C01B 21/04 (2006.01) F17C 13/02 (2006.01) F17C 13/12 (2006.01) F25D 19/00 (2006.01) F25J 1/00 (2006.01) F25J 3/08 (2006.01)
Patent
CA 2087355
In an apparatus for producing liquid nitrogen by supplying to a nitrogen gas separated from the atmosphere and than purified by an air separating device (4) into an insulated container (1) equipped with an extremely low temperature refrigerator, there are provided a pressure sensor (21) for detecting a pressure within a product vessel (20) of the air separating device (4) and a negative pressure sensor (16) for detecting a negative pressure within the insulated vessel (1) respectively. When at least one of both sensors (21)(16) detects a freezing of an impurity gas contained in the supplied nitrogen gas by reaching a predetermined pressure, an operation of the extremely low temperature refrigerator is stopped depending on the detection by one of both the sensors.
Kanegae Tsuyoshi
Kawaguchi Etsuji
Kondo Bungo
Sugasaki Yukiya
Yanai Masayoshi
Iwatani Plantech Corporation
Iwatani Sangyo Kabushiki Kaisha
Kirby Eades Gale Baker
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