Patent ID: 11906219
Assignee: COPELAND EUROPE GMBH
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 7:
8. The method according to claim 1, wherein the compressor comprises a discharge port and wherein the refrigeration cycle further comprises a heat rejection heat exchanger, which is connected to the discharge port of the compressor, and an expansion device disposed between the heat rejection heat exchanger and the flash tank, wherein the method further comprises:
if the controller determines that the flash tank pressure is lower than a second threshold, setting an opening degree of the expansion device to a predetermined value;
if the controller determines that the flash tank pressure is equal to or greater than the second threshold and lower than a third threshold, setting the opening degree of the expansion device to a value determined by the controller based on a first heat rejection heat exchanger pressure mode;
determining, via the controller, that the pressure in the flash tank is equal to or greater than the third threshold and lower than a fourth threshold and setting the opening degree of the expansion device to a value determined by the controller based on a second heat rejection heat exchanger pressure mode; or
determining, via the controller, that the pressure in the flash tank is equal to or greater than the fourth threshold and lower than a fifth threshold and controlling the opening degree of the expansion device based on fuzzy regulation; or
determining, via the controller, that the pressure in the flash tank is equal to or greater than the fifth threshold and lower than a sixth threshold and controlling the opening degree of the expansion device based on a flash tank pressure regulation mode; or
determining, via the controller, whether the pressure in the flash tank is equal to or greater than the sixth threshold and closing the expansion device.