US 11,754,304 B2
Speed control of an HVAC compressor based on operational envelope
Aron M. Seiler, Freeland, MD (US); Nicholas P. Mislak, Bel Air, MD (US); Chandra S. Yelamanchili, York, PA (US); Rajiv K. Karkhanis, York, PA (US); and Nathan T. Ostrye, Milwaukee, WI (US)
Assigned to JOHNSON CONTROLS TYCO IP HOLDINGS LLP, Milwaukee, WI (US)
Filed by Johnson Controls Technology Company, Auburn Hills, MI (US)
Filed on May 24, 2021, as Appl. No. 17/328,868.
Application 17/328,868 is a continuation of application No. 16/022,287, filed on Jun. 28, 2018, granted, now 11,022,334.
Claims priority of provisional application 62/662,647, filed on Apr. 25, 2018.
Prior Publication US 2021/0278099 A1, Sep. 9, 2021
Int. Cl. F24F 11/64 (2018.01); F24F 11/38 (2018.01); F24F 11/56 (2018.01); F24F 11/61 (2018.01); F24F 11/65 (2018.01); G05B 19/042 (2006.01); F24F 140/20 (2018.01)
CPC F24F 11/38 (2018.01) [F24F 11/56 (2018.01); F24F 11/61 (2018.01); F24F 11/64 (2018.01); F24F 11/65 (2018.01); G05B 19/042 (2013.01); F24F 2140/20 (2018.01); G05B 2219/2614 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A non-transitory, computer-readable medium comprising instructions, wherein the instructions, when executed by a processor, are configured to cause the processor to:
control a target speed range of a compressor of a heating, ventilation, and air conditioning (HVAC) system based on a comparison of an operation coordinate of the compressor with a target region of an operational envelope of the compressor, wherein the operational envelope defines compressor operation coordinates corresponding to a range of evaporating temperatures and a range of condensing temperatures of a working fluid, and the operation coordinate is defined by data indicative of a first temperature of the working fluid exiting the compressor and a second temperature of the working fluid entering the compressor;
iteratively adjust an upper threshold speed of the target speed range or a lower threshold speed of the target speed range while the operation coordinate is within a control region of the operational envelope, wherein the control region is outside of the target region, and
maintain the target speed range based on a determination that the operation coordinate transitions from the target region or the control region of the operational envelope to a deadband region of the operational envelope, wherein the deadband region is between the target region and the control region.