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System and method for controlling a variable-capacity compressor

  • US 10,018,392 B2
  • Filed: 06/09/2015
  • Issued: 07/10/2018
  • Est. Priority Date: 06/09/2014
  • Status: Active Grant
First Claim
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1. A climate-control system including a variable-capacity compressor unit and a control module controlling the compressor unit, the compressor unit operable in a first capacity mode and in a second capacity mode that is higher than the first capacity mode, the control module configured to switch the compressor unit among a shutdown state, the first capacity mode and the second capacity mode,wherein the control module switches the compressor unit between the first and second capacity modes based on a comparison of a total runtime of the compressor unit with a predetermined low-capacity runtime,wherein the total runtime of the compressor unit is a period of time over which the compressor unit has been running since most recently being in a shutdown state,wherein the control module adjusts the predetermined low-capacity runtime based on a number of times within a predetermined time period that the compressor unit has been switched into the shutdown state due to a demand signal switching from on to off.

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