An electronic expansion valve (3) of a refrigeration cycle is controlled such that during normal operation, refrigerant is always in a superheated state at the outlet of an evaporator (4). Then the refrigerant is periodically forced by a superheat control ...

In a refrigeration cycle electric signals for a capacity control valve 5 of a variable displacement compressor 1 and an electronic expansion valve 3 are directly measured. The differential pressure across the refrigeration cycle and the refrigerant flow ra...

An outflow prevention device 5, 5a, 5b, 5c for preventing refrigerant from flowing out into a vehicle compartment when an evaporator 6 has ruptured comprises a shut valve 8 in a passage via which refrigerant introduced from an expansion device is allowed t...

In a motor operated butterfly valve arrangement the at least one valve element (2) of which is to be brought into a proper extreme position such that e.g. water leakage or like does not occur within the pipe (1) controlled by said valve element, without th...