US 12,000,399 B2
Volume ratio control system for a compressor
Paul Nemit, Jr., Greencastle, PA (US); Angela Marie Comstock, Roanoke, VA (US); Franklin Aaron Montejo, York, PA (US); and Colin Campbell, Auburn Hills, MI (US)
Assigned to TYCO FIRE & SECURITY GMBH, Schaffhausen (CH)
Appl. No. 17/791,183
Filed by Johnson Controls Tyco IP Holdings LLP, Milwaukee, WI (US)
PCT Filed Jan. 7, 2021, PCT No. PCT/US2021/012451
§ 371(c)(1), (2) Date Jul. 6, 2022,
PCT Pub. No. WO2021/142087, PCT Pub. Date Jul. 15, 2021.
Claims priority of provisional application 62/958,204, filed on Jan. 7, 2020.
Prior Publication US 2023/0035387 A1, Feb. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F04C 18/16 (2006.01); F04C 28/12 (2006.01); F25B 41/39 (2021.01)
CPC F04C 18/16 (2013.01) [F04C 28/12 (2013.01); F25B 41/39 (2021.01); F25B 2339/047 (2013.01); F25B 2400/13 (2013.01); F25B 2600/0253 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A volume ratio control system for a compressor, comprising:
a chamber formed within a housing of the compressor, wherein a portion of the chamber is in fluid communication with a high pressure side of the compressor;
a piston disposed within the chamber, wherein the piston comprises a cavity in fluid communication with a low pressure side of the compressor, wherein the portion of the chamber and the cavity are fluidly separate from one another; and
a biasing device disposed within the cavity and configured to enable movement of the piston in response to a pressure differential between the low pressure side of the compressor and the high pressure side of the compressor falling below a threshold value wherein the threshold value is a variable threshold value.