Seal-less cryogenic expander

Details Seal-less cryogenic expander Seal-less cryogenic expander

F - Mech Eng,Light,Heat,Weapons

25

B

62/128

F25B 9/00 (2006.01) F25B 9/14 (2006.01) H01L 23/34 (2006.01)

Patent

CA 1273499

Abstract of the Disclosure A cryogenic refrigerator operating on the Split-Sterling cycle principle is disclosed. The refrigerator has a seal- less expander and achieves efficient operation without the use of external control apparatus. This is accomplished by sizing the expander so that two pressure differential forces developed across a displacer in the expander are approxi- mately equal in magnitude. For efficient operation, the expander's gas flow rate is selected to provide the proper time delay between the two pressure differential forces.

545740

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