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公开(公告)号：EP0835413B1
公开(公告)日：2004-09-01
申请号：EP96923365.9
申请日：1996-06-21
申请人： APD CRYOGENICS INC.
CPC分类号： F25B9/006 , F17C13/006 , F17C2221/012 , F17C2221/017 , F17C2221/038 , F17C2223/0161 , F17C2223/033 , Y02E60/321
摘要： A closed cycle cryogenic refrigerating system (10) with a fixed restrictor (28) operates with a compressor inlet (22) pressure in a range of 0.1 Mpa and 2.5 Mpa. A basic cryogenic refrigerant mixture is used to which is added approximately 3 % to 25 % of helium, hydrogen and/or neon. A ratio of refrigerant density at the inlet of the fixed restrictor (28) between steady-state operation and operation at the beginning of cool-down is in an approximate range of 7 to 17. Relatively rapid cool-down is achieved and evaporator (3) temperature is maintained in an approximate range of 70K to 120K.
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公开(公告)号：EP0835413A1
公开(公告)日：1998-04-15
申请号：EP96923365.0
申请日：1996-06-21
申请人： APD CRYOGENICS INC.
CPC分类号： F25B9/006 , F17C13/006 , F17C2221/012 , F17C2221/017 , F17C2221/038 , F17C2223/0161 , F17C2223/033 , Y02E60/321
摘要： A closed cycle cryogenic refrigerating system (10) with a fixed restrictor (28) operates with a compressor inlet (22) pressure in a range of 0.1 Mpa and 2.5 Mpa. A basic cryogenic refrigerant mixture is used to which is added approximately 3 % to 25 % of helium, hydrogen and/or neon. A ratio of refrigerant density at the inlet of the fixed restrictor (28) between steady-state operation and operation at the beginning of cool-down is in an approximate range of 7 to 17. Relatively rapid cool-down is achieved and evaporator (3) temperature is maintained in an approximate range of 70K to 120K.
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