Patent ID: 6484515
Filing Date: 2002-11-26
Classification: F02G,F04B,F25B

Abstract:
A pulse tube refrigerator, comprising:an aftercooler connected to a cylinder for sucking up/discharging a working gas, the aftercooler for removing the heat caused by the compression of the working gas sucked up into/discharged from the cylinder; a regenerator connected to the aftercooler, the regenerator for storing the sensible heat of the working gas passing through the regenerator and returning the sensible heat when the working gas inversely passes through the regenerator; a pulse tube connected to one end of the regenerator, the pulse tube for compressing/expanding the working gas passing through the regenerator and forming heat flow; an inertance tube and a reservoir connected to the pulse tube, the intertance tube and the reservoir for causing phase shift between a pressure pulse and mass flow and generating the heat flow in the pulse tube; a hot heat exchanger connecting the pulse tube to the inertance tube and emitting moved heat; and a cold heat exchanger for covering the regenerator and the pulse tube together such that connection channels are formed inside the cold heat exchanger in order to connect the regenerator to one end of the pulse tube inserted into the regenerator, wherein the cold heat exchanger comprises: a hollow cylindrical body combined with the outer circumference of the regenerator; a roughly hollow cylindrical central body, having steps and contacting and combined with the leading end of the pulse tube located in the middle of the body and the inner circumference of the regenerator; and a cover inserted into and combined with the inner circumference of the body on the body.