Pulse-tube refrigerator
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United States of America Patent
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-
Aug 15, 1995
Grant Date -
N/A
app pub date -
Aug 24, 1994
filing date -
Aug 24, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A double piston type pulse-tube refrigerator includes a compression cylinder, a compression piston reciprocably disposed within the compression cylinder, an expansion cylinder, an expansion piston reciprocating at preceding phase angle of about a quarter cycle and disposed within the expansion cylinder, a high temperature heat exchanger for cooling effectively working gas under compression stage interposed between the compression cylinder and the expansion cylinder, a regenerator connected to the high temperature heat exchanger, a low temperature heat exchanger connected to the regenerator and a pulse tube connected to the low temperature heat exchanger and the high temperature heat exchanger, a rotor with 4 magnetic poles constructed in a crank shaft and a ring with 4 magnetic poles corresponding to the rotor position disposed within a crank case for compensating torque unbalance.
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