Danfoss A/s

Jose Alvares

Lin Xiang Sun

Mogens H Rasmussen

Huai Yu Lin

Paul D Bishop

Ramesh Veerasurla

The disclosed refrigerant system includes a compressor having a motor that is cooled by motor cooling fluid provided to the motor from the main refrigerant loop by a motor cooling circuit. The system also includes a sub-cooling circuit to cool the motor cooling fluid.

Motor cooling and sub-cooling circuits for compressor

A centrifugal refrigerant compressor system includes an impeller connected to a shaft. A diffuser is arranged on a downstream side of the impeller and is configured to regulate refrigerant flow exiting the impeller. A magnetic bearing supports the shaft. A sensing element is configured to produce an output relating to a shaft condition. A controller is configured to receive the output and determine an undesired impeller operating condition based upon the shaft condition. The controller is configured to command the diffuser to a desired state in response to the undesired impeller operating condition.

Growing community of inventors

Tallahassee, FL, United States of America

Jose Alvares