The Gree CVE series permanent magnet synchronous variable frequency centrifugal chiller has been unanimously recognized by experts from authoritative institutions such as the Institute of Physics and Chemistry of the Chinese Academy of Sciences, Xi'an Jiaotong University, China Refrigeration Society, and China Refrigeration and Air Conditioning Industry Association as a high-speed and high-power permanent magnet synchronous variable frequency centrifugal chiller, reaching the "international" level. This unit is independently developed and manufactured by Gree, gathering advanced technological achievements in Gree's central air conditioning research and development. Compared with ordinary centrifugal chillers, the overall efficiency of the unit is increased by more than 65% throughout the year, and energy savings are more than 40%. This unit has outstanding energy-saving, reliability, and adaptability, and can be widely used in large office buildings, hospitals, schools, shopping malls, and process flows. It can also be directly replaced to carry out energy-saving renovations on existing air conditioning systems.