US 12,066,231 B2
Control system for a vapor compression system
Guillaume Julien Roullet, Sr., Nantes (FR); Alain Le Bras, Carquefou (FR); Damien Jean Daniel Arnou, Le Séguinière (FR); Paul Eric Le Sausse, Nantes (FR); Laurent Claude Eric Thibaud, Mouzillon (FR); and Francois Charles Andre Clunet, La Chapelle-sur-Erdre (FR)
Assigned to Tyco Fire & Security GmbH, Schaffhausen (CH); and Johnson Controls Industries SAS, Carquefou (FR)
Appl. No. 17/608,448
Filed by Johnson Controls Tyco IP Holdings LLP, Milwaukee, WI (US); and Johnson Controls Industries SAS, Carquefou (FR)
PCT Filed May 3, 2019, PCT No. PCT/EP2019/061376
§ 371(c)(1), (2) Date Nov. 2, 2021,
PCT Pub. No. WO2020/224742, PCT Pub. Date Nov. 12, 2020.
Prior Publication US 2022/0196310 A1, Jun. 23, 2022
Int. Cl. F25B 49/02 (2006.01); F25B 31/00 (2006.01)
CPC F25B 49/022 (2013.01) [F25B 31/004 (2013.01); F25B 2400/08 (2013.01); F25B 2500/16 (2013.01); F25B 2500/27 (2013.01); F25B 2600/0251 (2013.01); F25B 2600/13 (2013.01); F25B 2700/1932 (2013.01); F25B 2700/2105 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A vapor compression system, comprising:
a compressor configured to circulate a refrigerant through a refrigerant loop;
a sump configured to receive a mixture of lubricant and the refrigerant from the compressor; and
a controller comprising a memory and a processor, wherein the processor is configured to:
receive a first signal indicative of a temperature of the mixture within the sump;
receive a second signal indicative of a pressure of the mixture within the sump;
determine a relative amount of the refrigerant in the mixture based on the first signal and the second signal;
compare the relative amount to a threshold relative amount of the refrigerant in the mixture; and
output a control signal in response to the relative amount of the refrigerant in the mixture exceeding the threshold relative amount.