US 12,352,486 B2
Two-stage compressor having variable speed first stage
Matthew Cambio, La Crosse, WI (US)
Assigned to TRANE INTERNATIONAL INC., Davidson, NC (US)
Filed by TRANE INTERNATIONAL INC., Davidson, NC (US)
Filed on Jul. 27, 2022, as Appl. No. 17/815,474.
Prior Publication US 2024/0035711 A1, Feb. 1, 2024
Int. Cl. F25B 7/00 (2006.01); F25B 31/02 (2006.01)
CPC F25B 7/00 (2013.01) [F25B 31/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A heating, ventilation, air conditioning, and refrigeration (HVACR) system, comprising:
a compressor section including a first compressor and a second compressor, the first compressor includes a variable-frequency drive;
a first heat exchanger;
an expander;
a second heat exchanger;
a bypass line and one or more valves configured such that the first compressor can be selectively bypassed; and
a controller configured to control operation of the compressor section, the controller configured to not operate the first compressor in a cooling mode of the HVACR system and to operate both the first compressor and the second compressor in a heating mode of the HVACR system.