公开(公告)号：GB2488604A

公开(公告)日：2012-09-05

申请号：GB201103782

申请日：2011-03-04

Applicant: STFC SCIENCE & TECHNOLOGY

Inventor： BRADSHAW THOMAS WILLIAM ,  DAVENNE TRISTAN ,  PULKER CHRISTOPHER JAMES ,  CROOK MARTIN

IPC: F25B9/14 ,  F28D17/00

Abstract: There is disclosed a displacement type Stirling cycle cryogenic cooler which has a displacer cylinder 34 extending axially between warm and cold ends 44, 42, respectively. The cooler has a regenerator 40 arranged to reciprocate axially within the displacer cylinder and to provide a heat exchanging fluid path between the warm and cold ends. The arrangement can further include a flow shaper element 70, for example an aperture, provided at the cold end of the regenerator, the flow shaper being arranged to increase forced convection in the cold end of the cylinder by shaping the flow of fluid entering the cold end of the cylinder from the regenerator. Alternatively, the arrangement can include a thermal block 68 provided at the cold end of the displacer cylinder, the thermal block having an exposed face 74 arranged to deliver heat to the operating fluid, and the exposed face is patterned to increase heat transfer from the thermal block to the operating fluid.