Cryocooler and control method of cryocooler
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United States of America Patent
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Dec 19, 2023
Grant Date -
N/A
app pub date -
Sep 27, 2021
filing date -
Oct 1, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
A cryocooler includes a compressor, an expander that includes a motor and is driven by the motor, an inverter that controls an operation frequency of the motor, a high pressure line that connects the compressor to the expander such that a working gas is supplied from the compressor to the expander, a low pressure line that connects the compressor to the expander such that a working gas is collected from the expander to the compressor, a pressure measurement unit that is configured to measure pressures of the high pressure line and the low pressure line or to measure a differential pressure between the high pressure line and the low pressure line, and a controller that compares the differential pressure to a target pressure and controls the inverter such that the operation frequency of the motor is increased when the differential pressure exceeds the target pressure.
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