US 11,852,145 B2
Rotary compressors with variable speed and volume control
Jay H. Johnson, Houston, MN (US); John R. Sauls, La Crosse, WI (US); Gordon Powell, Stoddard, WI (US); and Daniel R. Crum, Huntersville, NC (US)
Assigned to Trane International, Inc., Davidson, NC (US)
Filed by Trane International Inc., Davidson, NC (US)
Filed on Dec. 27, 2019, as Appl. No. 16/728,570.
Application 16/728,570 is a division of application No. 14/504,182, filed on Oct. 1, 2014, granted, now 10,533,556.
Claims priority of provisional application 61/885,174, filed on Oct. 1, 2013.
Prior Publication US 2020/0132074 A1, Apr. 30, 2020
Int. Cl. F04C 29/12 (2006.01); F04C 28/14 (2006.01); F04C 28/12 (2006.01); F04C 28/28 (2006.01); F04C 28/24 (2006.01); F04C 28/08 (2006.01); F04C 18/16 (2006.01); F25B 1/047 (2006.01); F25B 49/02 (2006.01)
CPC F04C 29/124 (2013.01) [F04C 18/16 (2013.01); F04C 28/08 (2013.01); F04C 28/12 (2013.01); F04C 28/14 (2013.01); F04C 28/24 (2013.01); F04C 28/28 (2013.01); F25B 1/047 (2013.01); F25B 49/022 (2013.01); F04C 2240/403 (2013.01); F04C 2240/81 (2013.01); F04C 2270/025 (2013.01); F04C 2270/585 (2013.01); F25B 2600/0253 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A refrigeration system, comprising:
a compressor comprising a compressor housing defining a suction port, a working chamber, and a discharge port, the compressor further comprising at least two rotors in the working chamber cooperatively arranged relative to one another to compress a fluid as the at least two rotors rotate relative to one another, the fluid being received into the working chamber through the suction port and being discharged from discharge ends of the rotors through the discharge port;
a motor assembly including a motor operable to drive at least one of the at least two rotors at a rotational speed;
a controller configured to receive operational parameters of the refrigeration system; and
a volume control assembly at the discharge port of the compressor that is configured to receive a command signal from the controller and displace at least one volume control member relative to the discharge ends of the at least two rotors to vary a volume ratio of the compressor from a first condition to a second condition in response to operational parameters of the refrigeration system;
wherein the volume control assembly includes a radial discharge port volume control assembly; and
wherein the volume control assembly further includes an axial discharge port volume control assembly.