초록 ▼

A conduit is coupled to an oil accumulator with an orifice coupled in series with the conduit for limiting the flow of oil therethrough. A pressure sensor is coupled to the conduit for measuring the pressure in the conduit. An oil drain control solenoid valve is coupled to an electrical circuit also

A conduit is coupled to an oil accumulator with an orifice coupled in series with the conduit for limiting the flow of oil therethrough. A pressure sensor is coupled to the conduit for measuring the pressure in the conduit. An oil drain control solenoid valve is coupled to an electrical circuit also coupled to the pressure sensor for selectively opening the oil drain for the draining of oil into a collection tank without losing refrigerant.

대표청구항 ▼

[ What is claimed is:] [1.] An oil recovery system for use with a refrigerant recovery system for maintenance of a vehicle's air conditioning system comprising:a conduit for recovering refrigerant from a vehicle's air conditioning system;an accumulator coupled to said conduit for separating oil from

[ What is claimed is:] [1.] An oil recovery system for use with a refrigerant recovery system for maintenance of a vehicle's air conditioning system comprising:a conduit for recovering refrigerant from a vehicle's air conditioning system;an accumulator coupled to said conduit for separating oil from recovered refrigerant;an oil drain coupled to said accumulator for draining oil therefrom;an orifice coupled to said drain for limiting the flow rate of oil through said drain;a pressure sensitive transducer coupled to said drain;an oil drain solenoid valve coupled in series to said drain on a side of said valve opposite said accumulator;an electrical control circuit coupled to said pressure sensitive transducer and oil drain solenoid valve for selectively opening and closing said oil drain solenoid valve in response to pressure changes for draining oil from the accumulator; anda supply of new oil and a valve coupled to said supply and to said control circuit for injecting a predetermined amount of new oil into said conduit for refilling the vehicles air conditioning system with oil.