Patent Number: 6,305,174

Title: Self-triggering cryogenic heat flow switch

Abstract: Self-triggering cryogenic heat flow switches are used particularly with cooling systems that require a redundant operation. The self-triggering cryogenic heat flow switch has the simplest possible construction while providing a reliable, maintenance-free mode of operation, and ensures a self-switching connection between a heat sink and an end use device or application that is to be cooled. The heat flow switch includes an outer hollow cylinder 1 that is connected with a heat sink 9, and an inner body 2 that is arranged coaxially to the outer hollow cylinder 1 and connected to the end use device or application to be cooled. When the heat sink 9 is switched off, a concentric annular gap 4 fixed by spacers is provided between the hollow cylinder 1 and the inner body 2. The linear thermal expansion coefficient of the outer cylinder 1 is greater than that of the inner body 2, so that the outer cylinder 1 contracts into thermally conducting contact with the inner body 2 when the heat sink 9 is switched on to provide cooling.

Inventors: Binneberg; Armin (Freital, DE), Kaiser; Gunter (Dresden, DE)

Assignee: Institut fuer Luft- und Kaeltetechnik Gemeinnuetzige Gesellschaft mbH

International Classification: B64G 1/46 (20060101); B64G 1/50 (20060101); F25D 19/00 (20060101); F25B 9/14 (20060101); F25B 009/00 ()

Expiration Date: 10/23/2018