Gas compressor with discharge section and sub-discharge section

A gas compressor, comprising:

• a hollow cylinder member;
• a rotor rotatably disposed inside the hollow cylinder member;
• a plurality of vanes attached to the rotor in a projectable and houseable manner, the plurality of vanes including leading ends which are in contact with an inner circumferential surface of the hollow cylinder member, so as to define a plurality of compression rooms inside the hollow cylinder member, wherein:
• a cylinder room which changes a volume of each of the plurality of compression rooms, and performs a gas compression cycle is defined between the hollow cylinder member and the rotor,
• a suction section which sucks the gas is upstream of the cylinder room,
• a discharge section which discharges the gas is downstream of the cylinder room,
• a proximal section in which the hollow cylinder member and the rotor come closest to each other is in one position between the hollow cylinder member and the rotor, so that the cylinder room is defined and is a single cylinder room which performs the gas compression cycle one time per one cycle for each of the plurality of compression rooms, the cylinder room has an asymmetric shape such that a distant section in which the inner circumferential surface of the hollow cylinder member is furthest apart from an outer circumferential surface of the rotor is located upstream of a position to which the proximal section faces across a rotation center of the rotor in a rotation direction,
• at least one sub-discharge section, which maintains discharge pressure of the gas by releasing pressure of one of the plurality of compression rooms when the pressure of the gas in the one of the plurality of compression rooms reaches the discharge pressure, is upstream of the discharge section,
• an interval between the at least one sub-discharge section and the discharge section adjacent to the at least one sub-discharge section is the same as or narrower than an interval between leading ends of an adjacent two of the plurality of vanes, and
• in a state in which a downstream one of the adjacent two of the plurality of vanes faces the discharge section, the at least one sub-discharge section is in a position closer to an upstream one of the adjacent two of the plurality of vanes than the downstream one of the adjacent two of the plurality of vanes.