Patent ID: 11885537
Assignee: COPELAND EUROPE GMBH
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 7:
8. The method according to claim 7, wherein setting the opening degree of the economizer valve to a value calculated by using at least the first operation mode or the second operation mode comprises:
if the determined temperature of the refrigerant in the discharge line is below a fifth threshold, setting the opening degree of the economizer valve to a value calculated by using the first operation mode, which comprises setting an opening degree of the economizer valve to a value calculated from the superheat level of the refrigerant in the second path of the economizer heat exchanger;
if the determined temperature of the refrigerant in the discharge line is above the fifth threshold and below a sixth threshold, setting the opening degree of the economizer valve to a value calculated from the superheat level of the refrigerant in the economizer heat exchanger and the determined temperature of the refrigerant in the discharge line;
if the determined temperature of the refrigerant in the discharge line is above the sixth threshold and below a seventh threshold, setting the opening degree of the economizer valve to a value calculated from the determined temperature of the refrigerant in the discharge line; and
if the determined temperature of the refrigerant in the discharge line is above the seventh threshold, closing the economizer valve and stopping operation of the compressor.