The compressor and motor of the fully enclosed refrigeration compressor are all sealed in a steel shell, and the motor operates in gaseous refrigerant, which has the advantages of compact structure, small size, light weight, good sealing performance, low vibration and low noise. it is mainly used in household refrigeration air-conditioning equipment and small commercial refrigeration equipment. According to its structure type, fully enclosed refrigeration compressor can be divided into three types: reciprocating type, rolling type and scroll type.