TWO-STAGE ROTARY COMPRESSOR AND HEAT PUMP APPARATUS

摘要

Disclosed is a two-stage rotary compressor wherein the inner diameter of a cylinder is increased without an increase or with only a slight increase in the outer diameter of the cylinder, so that increase of the size of the compressor is suppressed, and the air volume of the compressor is increased. A spring (26) is provided in a high-stage vane chamber (27) of a high-stage compression unit (20), and a high-stage vane (23) is pushed against a high-stage rolling piston (22) by the force of the spring (26). No springs are provided in a low-stage vane chamber (17) of a low-stage compression unit (10), and a low-stage vane (13) is pushed toward a low-stage rolling piston (12) by the pressure of the refrigerant within a hermetic container (1). The inner diameter of a low-stage cylinder (11) can be increased without an increase or with only a slight increase in the outer diameter of the low-stage cylinder (11) because no springs are provided in the low-stage vane chamber (17).