Abstract: Nowadays, compressor manufacturers use a variety of technologies to enhance their compressor performance that can save energy to adapt to society demand and development. The effect of compressor efficiency is mainly divided into three parts: mechanical efficiency, motor efficiency and adiabatic thermal efficiency. Company research about heat transfer characteristics of the compressor interior is very inadequate; we mainly research the fluid mechanical and motor optimization design. Because influence that the heat transfer in compressor especially between inside and outside of cylinder is very large, in this field there is greatly potential improving the efficiency of the compressor. The papers mainly research the mechanism of cylinder heat transfer characteristics, the relationship between heat transfer and thermal conductivity. Also we probe ways to reduce the heat transfer and decrease suction overheating and the exhaust temperature. The effects of different thermal insulation and heat transfer coefficients on the heat exchange characteristics of the external surface of the cylinder were verified.

Key words: Rotor compressor, Heat transfer, Thermal insulation material