| 摘要 |
A method for operating a vapour compression system (1) is disclosed. The vapour compression system (1) comprises a compressor (2), a condenser (3), an expansion device (4), e.g. in the form of an expansions valve, and an evaporator (5) arranged along a refrigerant path. The method comprises the steps of: obtaining a superheat value being representative for the superheat of refrigerant entering the compressor (2); obtaining a subcooling value being representative for the subcooling of refrigerant entering the expansion device (4); and operating the expansion device (4) on the basis of the obtained superheat value and on the basis of the obtained subcooling value. It is an advantage that the subcooling value is taken into account when operating the expansion device (4), because variations in the subcooling value has significant influence on the refrigerating capacity of the evaporator (5) at a given opening degree of the expansion device (4). A more stable operation of the vapour compression system (1) is therefore obtained when taking the subcooling value into consideration. The vapour compression system (1) may advantageously further comprise an internal heat exchanger (6), e.g. in the form of a suction line heat exchanger. |
