Patent ID: 6892454
Filing Date: 2005-05-17
Classification: F01C,F04C,F25B,Y10T

Abstract:
1. A method for manufacturing a multi-stage compression type rotary compressor which comprises an electrical-power element, first and second rotary compression elements driven by the electrical-power element in a sealed vessel, the first and second rotary compression elements formed by first and second cylinders and first and second rollers which are fitted to first and second eccentric portions formed on a rotary shaft of the electrical-power element so as to eccentrically revolve in the cylinders; and a refrigerant gas compressed in the first rotary compression element and discharged therefrom is sucked into the second rotary compression element, compressed and then discharged therefrom; comprising the step of altering the inner diameter of the first cylinder without altering its thickness to set a displacement volume ratio between the first and second rotary compression elements in accordance with the alteration.