Method of improved control for variable volume ratio valve
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United States of America Patent
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Aug 15, 2023
Grant Date -
Jun 17, 2021
app pub date -
Nov 23, 2020
filing date -
Dec 21, 2018
priority date (Note) -
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Abstract
Variable volume ratio compressors may be controlled using a switching parameter based on compressor speed and suction density to improve the matching of compressor volume ratio to desired discharge conditions. Delay periods may be implemented in the determination of when to change volume ratio to control the frequency of changes to the volume ratio. The switching parameter may be a product of the compressor speed and suction density. The volume ratio of the compressor may be controlled by switching valves directing pressure to a piston of a variable volume ratio system of the compressor.
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