Patent ID: 6434947
Filing Date: 2002-08-20
Classification: F05C,F25B

Abstract:
A pulse tube refrigerator comprising:a compressor; a first high pressure on-off valve and a second high pressure on-off valve connected with a high pressure outlet port of the compressor; a first low pressure on-off valve and a second low pressure on-off valve connected with a low pressure inlet port of the compressor; a cryocooler comprising a regenerator, a cold head and a pulse tube arranged in series in line and connected with the first high pressure on-off valve and the first low pressure on-off valve at the regenerator; a cylinder member connected with the pulse tube at one end, and connected with the second high pressure on-off valve and the second low pressure on-off valve at the other end; a piston arranged in the cylinder member, the piston separating an interior of the cylinder into a first space connected with an inner space of the pulse tube and a second space connected with both the second high pressure on-off valve and the second low pressure on-off valve; a buffer connected with the second space; and a buffer side on-off valve provided between the buffer and the second space.