US 12,480,492 B2
Screw compressor and refrigeration apparatus
Tadashi Okada, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on Sep. 20, 2024, as Appl. No. 18/892,129.
Application 18/892,129 is a continuation of application No. PCT/JP2023/005938, filed on Feb. 20, 2023.
Claims priority of application No. 2022-051422 (JP), filed on Mar. 28, 2022.
Prior Publication US 2025/0012279 A1, Jan. 9, 2025
Int. Cl. F04C 18/16 (2006.01); F25B 31/02 (2006.01)
CPC F04C 18/16 (2013.01) [F25B 31/026 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A screw compressor comprising:
a screw rotor having a plurality of helical grooves; and
a gate rotor including gates configured to mesh with the helical grooves of the screw rotor,
each of the gates having a first seal line and a second seal line, with each configured to come into contact with a plurality of side wall surfaces of the helical grooves of the screw rotor,
a shape of the first seal line and a shape of the second seal line being asymmetric with respect to a first straight line passing through a rotation center of the gate rotor and a first intermediate position located on a tip end side of each of the gates between the first seal line and the second seal line, the first intermediate position being substantially centrally located on the tip end side of a respective gate,
a second straight line passing through the rotation center of the gate rotor and a second intermediate position located on a base end side of each of the gates between the first seal line and the second seal line, the second straight line being inclined at a predetermined angle with respect to the first straight line, the second intermediate position being substantially centrally located on the base end side of the respective gate, and
each of the helical grooves having a shape corresponding to each of the gates,
the first straight line not passing through a base end side of the respective gate as seen from an axial direction of the gate rotor.