control device is positioned in the connection line and arranged in the pressure equalizing configuration that couples the working pressure chamber of the expansion valve to the low pressure section of the working line application_number US 15459302 A description fig1 shows a traditional refrigeration system 1 in which a compressor 2 a condenser 3 a closing element 4 an expansion valve 5 and an evaporator 6 are arranged in series in a circuit via a working line 7 the closing element is in the form of a solenoid valve in a flow direction indicated by the arrow labelled 8 of a refrigerant of the refrigeration system 1 a low pressure side 9 of the working line 7 is connected downstream between the expansion valve 5 and the compressor 2 and a high pressure side 10 of the working line 7 is connected upstream of the expansion valve 5 further the refrigeration system 1 has a control line system 11 with a pressure equalizing connection 12 which connects the expansion valve 5 with the low pressure side of the working line 7 further the refrigeration system 1 has a thermal connection 13 which connects a bulb 14 which is arranged in an area of the low pressure side 9.