Environment protective refrigerant magnetic suspension high efficiency water chilling unit

The utility model provides an environment protective refrigerant magnetic suspension high efficiency water chilling unit. The unit comprises a magnetic suspension centrifugal compressor, a condenser, a first throttling device, an economizer, a heat exchange cylinder, a second throttling device and an evaporator, wherein the above-mentioned parts are successively communicated through pipes to form a circulation loop. The magnetic suspension centrifugal compressor is used for allowing bearing moving parts to fully suspend in the air, and the compressor is operated without friction. Structural vibration approaches zero, operation noise is low, and expensive damping fittings are not needed. The signal compressor of the unit has a starting current of only 2 A, and a quite small starting torque has minimum impact to the power grid. The magnetic suspension centrifugal compressor is designed without oil and has no need to be provided with an oil syringe and an oil-liquid separator, so that maintenance cost is reduced