초록 ▼

This invention relates to a compression refrigeration system having means for removing some of the oil refrigerant foam which is formed in a crankcase at startup. The removal of foam with entrained oil from the crankcase is to reduce the amount of oil pumped with the refrigerant through condenser an

This invention relates to a compression refrigeration system having means for removing some of the oil refrigerant foam which is formed in a crankcase at startup. The removal of foam with entrained oil from the crankcase is to reduce the amount of oil pumped with the refrigerant through condenser and evaporator and at the same time rapidly return oil to the crankcase during startup. In one embodiment of the invention, oil refrigerant foam goes from the crankcase to a foam trap where the foam collapses, the oil drains back to the crankcase, and the refrigerant vapor is drawn to an intake of the compressor. In another embodiment, oil refrigerant foam passes to a suction accumulator where the foam collapses, refrigerant vapor is drawn to an intake of the compressor and the vapor carries droplets of separated oil to a point where they drain back to the crankcase.

대표청구항 ▼

In a refrigeration system, a compressor comprising a crankcase, a reciprocating piston, a compression cavity, and a suction cavity, and leading from said compression cavity a circuit including in series, a condenser, an expansion device, an evaporator, an accumulator, and a connection to the suction

In a refrigeration system, a compressor comprising a crankcase, a reciprocating piston, a compression cavity, and a suction cavity, and leading from said compression cavity a circuit including in series, a condenser, an expansion device, an evaporator, an accumulator, and a connection to the suction cavity, the refrigeration system containing a refrigerant and oil for lubricating the compressor that form a reservoir of oil liquid refrigerant entrained therein during shutdown of the compressor, a conduit for venting foam from the crankcase to the accumulator, said conduit extending to the accumulator from a point on the crankcase that is above the level of the reservoir of oil refrigerant mixture at startup, said conduit having a check valve therein that permits flow only from the crankcase to the accumulator, the accumulator and return to the suction cavity being constructed so the refrigerant vapor drawn from the accumulator to the suction cavity will carry droplets of oil to the suction cavity.