PURPOSE: To make the independent operation and parallel operation with air-conditioning of a refrigerator possible, by mounting a refrigerant circuit of the refrigerator and a by-pass circuit for cooling a compressor in parallel with an evaporator circuit of a refrigerating cycle for air-conditioning, and by installing refrigerant circulation opening-and-closing means to each circuit.
CONSTITUTION: When a slide contact 31 is located at a position A, electricity is conducted to a motor coil 18 of a blower for air-conditioning and a magnetic clutch coil 22, and an expansion mechanism 4 of a refrigerating circuit for air-conditioning and an evaporator 5 function, thus independently operating air-conditioning. When the contact 31 is located at a position B, electricity is also conducted to a motor coil 24 of a blower for a refrigerator and a magnet valve 11, thus allowing the cooling of the refrigerator as well as air-conditioning. When the contact 31 is located at a position C, the electromagnetic clutch coil 22 is worked through a relay 25 from coils 20, 24 thus operating only a refrigerator circuit for the refrigerator. Lubrication and cooling to a compressor 1 is ensured by also letting a refrigerant flow to a by- pass circuit 10 at that time.
ENDOU YOSHIHIDE
MIYAMOTO SEIGO
