DEVICE AND METHOD FOR CONTROLLING OPERATION OF TRANSPORT REFRIGERATION UNIT

A transport refrigeration unit (102) and a method for controlling the transport refrigeration unit (102), wherein the transport refrigeration unit (102) has a controller device (110; 200) for operating a compressor (108) of the transport refrigeration unit (110) with a continuously-variable speed, which allows the compressor (108) to run continuously but with a smooth gradient range of speed variations. The controller device (110; 200) allows the transport refrigeration unit (102) to have a start-stop operation stage, continuous run operation stage, and/or a cycle-sentry operation stage.