In the "Important Historical Materials of Science and Technology" published by the National Science Museum of Japan in 20 18, the rotary compressor invented by Toshiba was selected.
Double rotor compressor means that the compressor consists of two rotors. Low frequency energy efficiency ratio is good, high frequency energy efficiency ratio is not as good as vortex, noise, vibration and wear are slightly larger than vortex, and life is shorter than vortex, so it is difficult to make large displacement.