US 12,320,566 B2
Suction gas heat exchanger control and utilization
Thibaut Gerson, Nancy (FR); Raphael Gury, Thaon les Vosges (FR); Jon P. Hartfield, La Crosse, WI (US); Laurent Maire Richard, Charmes (FR); Patrick Alexandre, Gézoncourt (FR); Sebastien Montemont, Charmes (FR); and Thierry Choffe, Charmes (FR)
Assigned to TRANE INTERNATIONAL INC., Davidson, NC (US)
Filed by TRANE INTERNATIONAL INC., Davidson, NC (US)
Filed on Jun. 30, 2022, as Appl. No. 17/854,957.
Prior Publication US 2024/0003603 A1, Jan. 4, 2024
Int. Cl. F25B 41/20 (2021.01); F25B 40/02 (2006.01); F25B 41/40 (2021.01); F25B 43/02 (2006.01); F25B 49/02 (2006.01)
CPC F25B 43/02 (2013.01) [F25B 40/02 (2013.01); F25B 41/20 (2021.01); F25B 41/40 (2021.01); F25B 49/02 (2013.01); F25B 2313/031 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A heating, ventilation, air conditioning, and refrigeration (HVACR) system, comprising:
a circuit including:
a compressor having a suction and a discharge;
a condenser;
an expander;
an evaporator; and
a lubricant separator located downstream of the discharge of the compressor and upstream of the condenser;
a temperature sensor configured to measure a temperature of working fluid in the circuit;
a heat exchanger located between the evaporator and the suction of the compressor;
a source line configured to direct a flow of the working fluid from the circuit to the heat exchanger, the source line connected to the circuit between the lubricant separator and the condenser;
a return line configured to direct the flow of the working fluid from the heat exchanger to the circuit, the return line connected to the circuit between the condenser and the evaporator; and
a valve configured to control the flow of the working fluid in the return line based on the temperature measured by the temperature sensor and a target superheat of the working fluid discharged from the compressor.