Heat source unit and refrigeration device having low-stage and high-stage compressors with four-way switching valve
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United States of America Patent
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Oct 22, 2024
Grant Date -
Jan 11, 2024
app pub date -
Sep 22, 2023
filing date -
Mar 29, 2021
priority date (Note) -
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status (Latency Note)
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Abstract
A heat source unit connected to a utilization-side unit and configured to perform a refrigeration cycle includes a low-stage compressor, a high-stage compressor, a four-way switching valve, a low-stage pipe, and a controller. The low-stage pipe is provided in parallel with the low-stage compressor, and the refrigerant flows therethrough while the low-stage compressor is stopped. The controller outputs an instruction signal for actuating the four-way switching valve, to the four-way switching valve while the low-stage compressor is stopped and the high-stage compressor is operating.
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