US 12,460,850 B2
Vapor injection refrigerant systems
Nathan John English, Brighton, MI (US); Lawrence P. Ziehr, Clarkston, MI (US); and Satish P. Ketkar, Troy, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on May 5, 2023, as Appl. No. 18/312,815.
Prior Publication US 2024/0369274 A1, Nov. 7, 2024
Int. Cl. F25B 49/02 (2006.01); F25B 5/02 (2006.01); F25B 41/22 (2021.01)
CPC F25B 49/02 (2013.01) [F25B 5/02 (2013.01); F25B 41/22 (2021.01); F25B 2500/18 (2013.01); F25B 2600/2507 (2013.01); F25B 2600/2513 (2013.01); F25B 2700/195 (2013.01); F25B 2700/21163 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A vapor injection refrigerant system comprising:
a compressor including at least a first stage and a second stage, the compressor configured to output refrigerant in vapor form;
a condenser coupled to the compressor;
an evaporator coupled to the condenser;
a chiller coupled to the condenser;
a three-way valve including a first outlet coupled to the second stage of the compressor and a second outlet coupled to an outlet of the evaporator; and
a control module in communication with the three-way valve, the control module configured to control the three-way valve to inject refrigerant in vapor form into the second stage of the compressor at a pressure greater than a pressure of the first stage of the compressor.