US 11,913,453 B2
Slide valve for a twin-screw compressor
Shengmei Yang, Wuxi (CN); and Shahebaz Malik, Mechanicsburg, PA (US)
Assigned to Johnson Controls Tyco IP Holdings LLP, Milwaukee, WI (US); and Johnson Controls Air Conditioning and Refrigeration (Wuxi) Co., Ltd., Jiangsu (CN)
Appl. No. 16/652,378
Filed by Johnson Controls Technology Company, Auburn Hills, MI (US); and JOHNSON CONTROLS AIR CONDITIONING AND REFRIGERATION (WUXI) CO., LTD., Wuxi (CN)
PCT Filed Sep. 26, 2018, PCT No. PCT/IB2018/057427
§ 371(c)(1), (2) Date Mar. 30, 2020,
PCT Pub. No. WO2019/064187, PCT Pub. Date Apr. 4, 2019.
Claims priority of application No. 201721291991.9 (CN), filed on Sep. 30, 2017.
Prior Publication US 2020/0291942 A1, Sep. 17, 2020
Int. Cl. F03C 2/00 (2006.01); F03C 4/00 (2006.01); F04C 2/00 (2006.01); F04C 18/00 (2006.01); F04C 28/12 (2006.01); F04C 18/08 (2006.01); F16K 3/26 (2006.01); F04C 29/00 (2006.01); F04C 18/16 (2006.01)
CPC F04C 28/12 (2013.01) [F04C 18/088 (2013.01); F04C 18/16 (2013.01); F04C 29/0035 (2013.01); F16K 3/26 (2013.01); F04C 2270/14 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A slide valve configured to regulate a load of a twin-screw compressor, comprising:
a slide valve body of the slide valve, wherein the slide valve body has a connecting end and a free end, the connecting end is configured to connect to a slide valve connecting rod of the twin-screw compressor, the slide valve is configured to be driven by the slide valve connecting rod, the free end of the slide valve body comprises an end face configured to at least partially define an air return passage of the twin-screw compressor, a cavity is formed in the end face of the free end and extends into the slide valve body, the slide valve has at least one passage configured to fluidly couple the cavity to an external fluid to reduce air flow pulsations on a suction side of the twin-screw compressor, the at least one passage is configured to fluidly couple the cavity to the air return passage to enable flow of the external fluid from the air return passage into the cavity, the cavity is one of a plurality of cavities formed in the free end, and each cavity of the plurality of cavities has its own single passage.