Refrigerant recovery and purification system

A refrigerant recovery and purification system for removing gaseous refrigerant from a disabled refrigeration unit, cleansing the refrigerant of contaminants, and converting the gaseous refrigerant to a liquid state for storage or subsequent return to the refrigeration unit upon repair thereof, said system comprising a compressor, first conduit means for coupling the compressor to a refrigerant line in the refrigeration unit, trap means in the first conduit means for removing oil and impurities from the gaseous refrigerant prior to reception thereof in the compressor, condensing means coupled to the compressor by second conduit means for receiving compressed refrigerant emanating from the compressor, evaporating means disposed in heat exchange relationship with said condensing means for effecting the conversion of the compressed refrigerant to a liquid state, third conduit means for conveying a gaseous fluid through said evaporating means with said fluid being at a temperature adequate for effecting said conversion with said third conduit means being coupled to said reservoir for receiving liquid refrigerant therefrom, expansion means disposed in said third conduit means for converting the liquid refrigerant therein to a gaseous state for providing the gaseous fluid conveyed through the evaporating means, reservoir means coupled to said condensing means by fourth conduit means for receiving the liquid refrigerant from the condensing means, filter and drying means disposed in said fourth conduit means for removing acid, moisture, foreign particles and the like, fifth conduit means coupled to said reservoir for conveying liquid refrigerant to a point of utilization, and sixth conduit means coupled to said evaporating means and said first conduit means for conveying the gaseous fluid from the evaporating means to the compressor.