DETERGENT FOR A PULSED TUBE CONCENTRIC COOLER, THIS COOLER AND COOLING SYSTEM USING THE SAME

摘要

BR The invention relates to an expansion valve for a concentric cooler with a pulsed tube. BR/ The expander (10 ') comprises a central tube (18) with pulsation, a concentric insulation tube inside which is delimited a concentric chamber (19 ') occupied by an insulator which is atmospheric, and a regenerator surrounding the concentric insulation tube. The latter has a vent allowing the chamber (19 ') to communicate with the surrounding atmosphere. When used in space, the chamber is occupied by the vacuum which thus constitutes the insulation and ensures effective insulation at cryogenic temperatures. BR/ Application area: Cryogenic cooling devices and systems for applications aeronautics, spacecraft, etc. / P