Hermetically-sealed compressor with motor

Abstract

A horizontal type compressor-motor combination for compressing a gaseous refrigerant is hermetically sealed within a case which contains in its bottom accumulated lubricating oil and is internally divided into compressor and motor chambers respectively housing a compressor device and a motor for driving the compressor device through a common rotor shaft coupling the rotor of the motor and an eccentric rotor of the compressor device and being rotatably supported by inner and outer bearings, the compressor device having a cylinder block interposed between the inner and outer bearings. A compressor-motor of this basic organization is improved by a communication passage formed axial through the rotor shaft for conducting the refrigerant, one end of this passage being connected to the motor chamber, the other end being connected to a delivery chamber of the compressor chamber. By this structural organization, the gaseous refrigerant compressed to a high pressure in the compressor device is conducted through the passage formed through the rotor shaft or a passage through the outer bearing, cylinder block, and inner bearing into the rotor chamber thereby to raise the oil level in the compressor chamber, whereby lubricating oil is supplied positively and stably to the bearings and other moving parts.