Patent ID: 9175884
Filing Date: 2015-11-03
Classification: F25B

Abstract:
1. A pulse tube cryocooler comprising: a glass substrate having first and second ends, an etching surface, and a plurality of channels etched into the etching surface, said plurality of channels defining a heat exchanger positioned at the first end, an aftercooler positioned at the second end, a cold head disposed between the heat exchanger and the aftercooler, a pulse tube disposed between and in fluid communication with the heat exchanger and the cold head, and a regenerator disposed between and in fluid communication with the cold head and the aftercooler; wherein the etched surface of the glass substrate is bonded with a glass plate to enclose the plurality of channels to form capillaries for conducting and distributing a fluid; and wherein the regenerator is connected or connectable with an oscillating compressor which compresses or permits expansion of the fluid such that a temperature gradient is formed at the cold head to insulate the first and second ends.