Pulse tube refrigerator
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United States of America Patent
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May 14, 1996
Grant Date -
N/A
app pub date -
Feb 21, 1995
filing date -
Feb 21, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Two three-way valves (12) (13) of the rotary type are arranged in parallel in a high-pressure refrigerant gas passage (15) of a compressor (7). A high-temperature end portion of a cold accumulator (2) is communicated with one three-way valve (12) of the rotary type through a main gas passage (19) as well as a high-temperature end of a pulse tube (1) is communicated with the other three-way valve (13) of the rotary type through a sub gas passage (20). A low-pressure port of each three-way valve (12)(13) is communicated with a low-pressure refrigerant gas return passage (17) of the compressor (7) respectively. A flow regulating member (21) is interposed in the sub gas passage (20). Both the three-way valves (12) (13) are synchronously rotated. A valve opening-closing timing of the one three-way valve (12) or (13) is adjustably changed relative to that of the other three-way valve (13) or (12).
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