Patent ID: 9134046
Filing Date: 2015-09-15
Classification: F25B

Abstract:
1. A pulse tube refrigerator, comprising: a first pulse tube configured to perform adiabatic expansion of a coolant gas; a first regenerator connected to the first pulse tube, the first regenerator being configured to store cooling generated at the first pulse tube based on the adiabatic expansion of the coolant gas; a compressor configured to compress the coolant gas; a first supply side valve configured to put in communication or block off communication between a supply side of the compressor and a high temperature end of the first regenerator; a first suction side valve connected to the high temperature end of the first regenerator via a first joint point, the first joint point being an intermediate point between the supply side of the first supply side valve and the high temperature end of the first regenerator, the first suction side valve being configured to put in communication or block off communication between the high temperature end of the first regenerator and a suction side of the compressor; a first self seal joint provided between the supply side of the compressor and a suction side of the first supply side valve; a second self seal joint provided between a supply side of the first suction side valve and the suction side of the compressor; a third self seal joint provided between the first joint point and the high temperature end of the first regenerator; a first buffer connected with the high temperature end of the first pulse tube; a valve unit where the first supply side valve and the first suction side valve are mounted; a second pulse tube configured to perform adiabatic expansion of coolant gas; a second regenerator provided between a low temperature end of the second pulse tube and a low temperature end of the first regenerator; a third supply side valve connected to the supply side of the compressor via a sixth joint point, the sixth joint point being an intermediate point between the suction side of the first supply side valve and the first self seal joint, the third supply side valve being configured to put in communication or block off communication between the high temperature end of the second pulse tube and a supply side of the compressor; a third suction side valve connected to the suction side of the compressor via a seventh joint point, the seventh joint point being an intermediate point between the supply side of the first suction side valve and the second self seal 30 joint, the third suction side valve being configured to put in communication or block off communication between the high temperature end of the second pulse tube and the supply side of the compressor; and a seventh self seal joint provided between the supply side of the third supply side valve and the high temperature end of the second pulse tube; wherein the first buffer is mounted in the valve unit, wherein the third supply side valve and the third suction side valve are mounted in the valve unit; wherein a second buffer connected with the high temperature end of the second pulse tube via a tenth joint point being an intermediate point between the supply side of the third supply side valve and the seventh self seal joint; and wherein the second buffer is mounted in the valve unit.