DEVICE FOR PREVENTING BACKFLOW OF REFRIGERANT OF REFRIGERATING/FREEZING MACHINERY

摘要

PURPOSE: A device for preventing backflow of refrigerant of refrigerating/freezing machinery is provided to prevent backflow of refrigerant due to difference between vaporizing pressures when multiple evaporators are cooled by a single compressor. CONSTITUTION: A device includes refrigerant backflow preventing valves(155,160) on refrigerant supply passages(113a,113b) connecting a compressor(110) with multiple evaporators(145,150) to prevent backflow of refrigerant due to difference between vaporizing pressures generated by the evaporators. The refrigerant backflow preventing valves are installed on outlets of all of the evaporators. The refrigerant backflow preventing valve is installed to one of the evaporators for a freezing compartment or a refrigerating compartment whose vaporizing pressure is higher.