US 12,123,413 B2
Screw compressor having a plurality of branch paths with intersects and central axes
Kotaro Chiba, Tokyo (JP); Masahiko Takano, Tokyo (JP); Shigeyuki Yorikane, Tokyo (JP); Kenji Morita, Tokyo (JP); and Yoshitaka Takeuchi, Tokyo (JP)
Assigned to Hitachi Industrial Equipment Systems Co., Ltd., Tokyo (JP)
Filed by Hitachi Industrial Equipment Systems Co., Ltd., Tokyo (JP)
Filed on May 11, 2022, as Appl. No. 17/741,886.
Application 17/741,886 is a continuation of application No. 16/954,847, granted, now 11,359,626, previously published as PCT/JP2018/044492, filed on Dec. 4, 2018.
Claims priority of application No. 2017-243447 (JP), filed on Dec. 20, 2017.
Prior Publication US 2022/0268276 A1, Aug. 25, 2022
Int. Cl. F04C 2/16 (2006.01); B05B 1/26 (2006.01); F04C 18/16 (2006.01); F04C 29/00 (2006.01); F04C 29/02 (2006.01)
CPC F04C 2/16 (2013.01) [B05B 1/26 (2013.01); F04C 18/16 (2013.01); F04C 29/0007 (2013.01); F04C 29/028 (2013.01); F04C 2240/30 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A screw compressor comprising:
a screw rotor,
a casing configured to accommodate the screw rotor, and
a liquid supply mechanism configured to supply liquid in a compression chamber defined in the casing,
wherein the liquid supply mechanism includes a plurality of liquid supply sections causing jet streams of the liquid to collide with each other to be thinned or atomized so as to supply to the compression chamber; and a supply path configured to supply the liquid supplied from an upstream to the plurality of liquid supply sections,
the plurality of liquid supply sections are directly connected to a side surface of the supply path,
the plurality of liquid supply sections includes a first liquid supply section, and a second liquid supply section located downstream of the supply path with respect to the first liquid supply section,
the first liquid supply section communicates with a first region of the compression chamber,
the second liquid supply section communicates with a second region of the compression chamber, and
a gas pressure in the first region is higher than a gas pressure in the second region, wherein
the supply path communicates with the first liquid supply section on a high pressure side where the pressure of the liquid is higher in the supply path, so that air in the compression chamber is prevented from flowing back into the supply path via the plurality of liquid supply sections.