US 12,135,032 B2
Screw compressor having working chamber closing member to regulate suction working medium flow to a working chamber
Takeshi Tsuchiya, Tokyo (JP); Kotaro Chiba, Tokyo (JP); Shuhei Nagata, Tokyo (JP); Shigeyuki Yorikane, Tokyo (JP); Kenji Morita, Tokyo (JP); and Yuta Kajie, Tokyo (JP)
Assigned to Hitachi Industrial Equipment Systems Co., Ltd., Tokyo (JP)
Appl. No. 18/273,850
Filed by Hitachi Industrial Equipment Systems Co., Ltd., Tokyo (JP)
PCT Filed Mar. 28, 2022, PCT No. PCT/JP2022/015167
§ 371(c)(1), (2) Date Jul. 24, 2023,
PCT Pub. No. WO2022/224727, PCT Pub. Date Oct. 27, 2022.
Claims priority of application No. 2021-072268 (JP), filed on Apr. 22, 2021.
Prior Publication US 2024/0068475 A1, Feb. 29, 2024
Int. Cl. F04C 29/12 (2006.01); F04C 18/08 (2006.01); F04C 18/16 (2006.01); F04C 29/00 (2006.01); F25B 1/047 (2006.01)
CPC F04C 29/12 (2013.01) [F04C 18/16 (2013.01); F04C 18/08 (2013.01); F04C 18/084 (2013.01); F04C 29/00 (2013.01); F04C 2240/20 (2013.01); F04C 2240/30 (2013.01); F04C 2240/40 (2013.01); F04C 2240/80 (2013.01); F05B 2260/4031 (2013.01); F25B 1/047 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A screw compressor for compressing a working medium sucked through a suction opening and discharging the compressed working medium through a delivery opening,
the screw compressor comprising:
a male rotor and a female rotor that rotate while meshing with each other;
a casing that houses the male rotor and the female rotor and is provided with a bore which forms a working chamber, that together with the male rotor and the female rotor, compress the working medium;
a drive unit that rotationally drives the female rotor;
a working chamber closing member that forms a suction port for sucking the working medium into the working chamber received through the suction opening and closes off the working chamber when the working chamber reaches a maximum capacity; and
a suction space that connects the suction opening and the suction port to allow the sucked working fluid to flow therethrough to the suction port, the suction space including an open space that is provided adjacent the working chamber closing member between a shaft of the male rotor and a shaft of the female rotor on an opposite axial side of the male rotor and the female rotor relative to the suction port;
wherein the open space is divided into and provided as the male rotor's side and the female rotor's side; and
wherein the open space is formed so that the working medium which flows through outside the shaft of the male rotor in the suction space flows into the open space on the male rotor's side and the working medium which flows through outside the shaft of the female rotor in the suction space flows into the open space on the female rotor's side.