Patent ID: 8419380

Claim:
A hermetic compressor, comprising: a first cylinder having a first compression space, a first inlet in communication with the first compression space and directly connected to a suction pipe connected to a refrigeration cycle, and a bypass hole that diverges from a middle part of the first inlet; a second cylinder having a second compression space, and a second inlet in communication with the second compression space and the first inlet; and a bearing plate disposed between the first and second cylinders to separate the first and second compression spaces from each other, the bearing plate having a communication hole in communication with the bypass hole of the first cylinder to provide for communication between the first and second inlets, wherein a diameter D 3 of the bypass hole of the first cylinder is greater than or equal to about 0.9 times a diameter D 2 of the first inlet, a diameter D 4 of the communication hole of the bearing plate is greater than or equal to about 0.9 times the diameter D 3 of the bypass hole, and a diameter D 5 of the second inlet is greater than or equal to about 0.9 times the diameter D 4 of the communication hole, the diameter D 2 of the first inlet is about 0.9 to 1.3 times a diameter D 1 of a suction pipe, and wherein a volume of the communication hole corresponds to 1%-10% of a volume of the second compression space, and wherein the second inlet is formed on an inner circumferential edge of the second cylinder and has an inclination of about 30° to 60° with respect to the first inlet from an upper surface of the second cylinder which is connected to the communication hole to the inner circumferential edge of the second cylinder.