Abstract: An apparatus for reclaiming and purifying used refrigerant is comprised of a purification unit having a suction inlet for gaseous refrigerant and an outlet for fluid refrigerant. The suction inlet is connected through a suction accumulator in which remnants of oil are precipitated from the refrigerant and collected at the bottom of the accumulator. The outlet is connected to a collector tank for partially purified liquid refrigerant, an upper end portion of the collector tank is connected to the atmosphere through controllable means for blowing off non-condensable gases precipitated from the received liquid refrigerant. Means are provided for condensing out remnants of refrigerant from the blown-off gas from the collector tank before the gas is released to the atmosphere. An outlet in the bottom of the suction accumulator is connected to a separate underlying oil reservoir in which the precipitated oil, extracted from the used refrigerant in the oil separator, is collected.

Abstract: A system for recovering and refining volatile liquids such as refrigerants includes a suction accumulator which serves as a precleaning module. The accumulator has an intake for contaminated fluids. A compressor having a suction side thereof is connected to the suction accumulator, while a discharge side thereof is connected to a condenser which, in turn, delivers the condensed liquid gas to a collector tank. A filter removes contaminants from the fluid flow in the connection between the suction accumulator and the collector tank. Precleaning of the intake fluid in the suction accumulator is accomplished by cold surface distillation to remove contaminants. Efficient distillation of the intake fluid is achieved from the beginning of the recovery of the volatile fluid by diffusing the incoming fluid over a cold surface of an evaporating refrigerant provided as a precharge in the suction accumulator.

Abstract: In systems or units for collecting volatile liquids, e.g. refrigerants from scrapped refrigeration systems, the liquid may be successively filled into a closed collector tank, inasfar as the vapor of the liquid as collected in the upper space of the tank will be condensed into the liquid as this rises in the tank. However, there will be separated also an amount of non-condensible gas, e.g. atmospheric air, that will cause a steadily increasing pressure in the tank, so that it is necessary to regularly effect a venting of the tank, that is a gas blow-off, by suitably controlling an upper blow-off valve on the tank.

Abstract: An apparatus for reclaiming and recovering a volatile liquids such as a refrigerant contained in a closed working circuit. An inlet separator container is connected with a suction side of a compressor for an intake of a liquid and a gaseous phase, and a condenser is connected with a discharge side of the compressor, the condenser is additionally connected with a receiver for the condensed liquid, and a purifying filter is arranged in a flow connection between the separator container and the receiver. The filter includes a moisture adsorbing filter, and the filter is arranged in a flow connection between a discharge side of the compressor and the condenser, with an oil mist filter being mounted upstream of the moisture adsorbing filter.