2 STAGE ROTARY COMPRESSOR

摘要

The present invention provides a 2 stage rotary compressor including a hermetic container (101 ), an electric motor (110) provided in the hermetic container (101 ) and composed of an stator (111 ), a rotor (112) and a rotation axis (113), a low pressure compression assembly (120) including a low pressure cylinder (121 ), a low pressure eccentric portion (122) rotated along an inner diameter of the low pressure cylinder (121 ) due to rotation of the rotation axis (113), a low pressure roller (123) rotatably coupled to the outside of the low pressure eccentric portion (122), and a low pressure vane (124) for partitioning off an inner space of the low pressure cylinder (121 ), a high pressure compression (130) assembly including a high pressure cylinder (131 ), a high pressure eccentric portion (132) rotated along an inner diameter of the high pressure cylinder (130) due to rotation of the rotation axis (113) a high pressure roller (133) rotatably coupled to the outside of the high pressure eccentric portion (132), and a high pressure vane (134) for portioning off an inner space of the high pressure cylinder (131 ) a middle plate (140) for separating the low pressure cylinder (121 ) from the high pressure cylinder (131 ), middle pressure communication holes (161a, 140a) formed in the low pressure cylinder (121 )and the middle plate (140) to communicate with each other,, and a middle pressure inflow groove (130a) formed in the high pressure cylinder (131 ) to communicate with the communication holes (161a, 140a) of the low pressure cylinder (121 ) and the middle plate (140). In this configuration, the hole or groove can be formed in the low pressure cylinder (121 ), the middle plate (140) and the high pressure cylinder (131 ) by means of a relatively simple mechanical processing to define an inner passage of middle pressure refrigerant compressed in the low pressure compression assembly (120).