Patent ID: 9644874
Date: 2017-05-09
CPC Classifications: F25B

Claim:
1. A method for controlling a supply of refrigerant to an evaporator of a vapour compression system, the vapour compression system comprising an evaporator, a compressor, a condenser and an expansion device arranged in a refrigerant circuit, the method comprising the steps of: actuating a component of the vapour compression system in such a manner that a dry zone in the evaporator is changed, measuring a temperature signal representing a temperature of refrigerant leaving the evaporator, analysing the measured temperature signal, determining a temperature value where a gain of a transfer function between the actuated component and the measured temperature drops from a maximum value to a minimum value, in a decreasing temperature direction, defining the determined temperature value as corresponding to a zero superheat (SH=0) value of refrigerant leaving the evaporator, and controlling a supply of refrigerant to the evaporator in accordance with the defined SH=0 temperature value, and on the basis of the measured temperature signal.