Refrigerant recovery and purification machine

A purification and recovery machine for refrigerants, said machine comprising an inlet means for connecting the machine to a source of refrigerant to be purified, means connected to said inlet means for vaporizing refrigerant to be purified, filter means connected to said means for vaporizing for removing solid and liquid impurities from the refrigerant to be purified, separator means connected to said filter means for removing oil from the refrigerant, an air separator tank connected in flow communication to said filter means, said air separator tank including vent means for removing air from the refrigerant, outlet means connected to said air separator tank for draining the refrigerant into a storage reservoir, and compressor means for circulating the refrigerant through said means for vaporizing and said air separator tank into a storage reservoir, said separator means positioned between said compressor means and said means for vaporizing wherein oil from said compressor is removed from said refrigerant, float means positioned in said air separator tank for opening said outlet means when said air separator fills past a predetermined level, said float means including a first buoyant float suspended from a rod and said air separator from said conduit, said first float connected to an outlet valve means positioned along said outlet means wherein said outlet valve means is opened upon refrigerant level in said air separator tank reaching a predetermined level, and a second buoyant float suspended on said rod spaced from said first float, means connecting said second float to said inlet means to shut off said machine upon the second float reaching a predetermined level.