Abstract: A refrigerant recycling apparatus for use in conjunction with a refrigerant recovery unit for transferring refrigerant from a first container to a second container. The refrigerant recovery unit includes a compressor having a suction side and a discharge side. The refrigerant recycling apparatus comprises a first section including a filter having a filter inlet and a filter outlet. A first conduit is provided in fluid communication between the filter inlet and the first container. A heater is provided along the first conduit. A second conduit is provided in fluid communication between the filter outlet and the refrigerant recovery unit inlet. The refrigerant recycling apparatus has a second section including an oil separator fluidly connected in series with a condenser having an inlet and an outlet. A third conduit is provided between the refrigerant recovery unit outlet and the oil separator. The condenser outlet is in fluid communication with the second container.

Abstract: A refrigerant recovery and recycling apparatus which transfers refrigerant from a first container to a second container. The refrigerant recovery and recycling apparatus comprises a compressor having a suction side and a discharge side. The suction side of the compressor is in fluid communication with the first container, and the discharge side is in fluid communication with the second container. A liquid/vapor sensor is connected to the first container to detect whether the refrigerant from the first container is in a liquid state or a vapor state. A heater is located between the first container and the suction side of the compressor. The heater is responsive to the liquid/vapor sensor to vaporize liquid refrigerant from the first container. A condenser having an inlet and an outlet is provided. The inlet of the condenser is in fluid communication with the discharge side of the compressor. A filter having an inlet and an outlet is also provided.

Abstract: A refrigerant recovery apparatus for transferring refrigerant from a first container to a second container includes a compressor having a suction side and a discharge side, a condenser coupled with the discharge side of the compressor and first and second refrigerant inlets and first and second refrigerant outlets. The first and second refrigerant inlets are in fluid communication with the suction side of the compressor. A liquid/vapor switch is suitably positioned between the first refrigerant inlet and the suction side of the compressor to detect whether refrigerant passing through the first refrigerant inlet is in a liquid state or a vapor state. First and second refrigerant outlets are in fluid communication with the discharge and suction sides of the compressor, respectively. The first refrigerant inlet is in fluid communication with the first refrigerant outlet, bypassing the condenser and the compressor.

Abstract: A combined refrigerant recovery, evacuation and recharging apparatus for transferring refrigerant from a first container to a second container and deeply evacuating the first container. The apparatus includes a compressor having a suction side and a discharge side, a vacuum pump having a suction side and a discharge side, and a motor which is coupled with and drivingly engageable to the compressor and the vacuum pump.

Abstract: A combination fluid level indicator and fluid discharge device is provided for preventing inaccurate fluid level indications and facilitating fluid discharge from a compressor or other container. The device includes a body or conduit having an inlet end installed in an aperture through to a compressor housing to fluidly communicate with the compressor and receive the lubricating oil therefrom. A visual indicator provides an indication of the level of the oil within the compressor housing. A discharge port with cap, plug, valve or other flow control member permits selective discharge of the fluid from the compressor through the body. The device is installed in an aperture extending through a side of a compressor housing proximate the bottom thereof and indicates the level of lubricating oil within the housing and permits discharge of oil from the housing.

Abstract: A hand-transportable unit for transferring refrigerants between containers includes a pump to remove refrigerant from a first container The pump is driven by a pneumatic motor. The pump is capable of transferring refrigerant in liquid form, vapor form, or simultaneously in both forms. A condenser for cooling refrigerant is in fluid communication with the pump. The unit also includes a compressor for driving the pneumatic motor to operate the pump. Optionally, the pump may be powered from an external source of compressed gas. The other components of the unit are mounted to a handcart including a frame and wheels to facilitate movement of the unit. In a preferred embodiment, unit is configured for self-evacuation by use of the pump in order to avoid cross-contamination of different refrigerants during subsequent use of the unit.

Abstract: A portable refrigerant recovery unit including a compressor, a condenser and an internal receiver or container for recovering refrigerant from a refrigeration unit or other container. A level measuring device determines the level of liquid refrigerant in the internal container. A control device responds to the level measuring device and disables the compressor when the liquid refrigerant in the internal container reaches a predetermined level. Refrigerant can be temporarily stored within the internal container or passed through the internal container to an external container as refrigerant is being removed from the refrigeration unit.

Abstract: A hand-transportable unit for transferring refrigerants between containers includes a pump to remove refrigerant from a first container. The pump is driven by a pneumatic motor. The pump is capable of transferring refrigerant in liquid form, vapor form, or simultaneously in both forms. A condenser for cooling refrigerant is in fluid communication with the pump. The unit also includes a compressor for driving the pneumatic motor to operate the pump. Optionally, the pump may be powered from an external source of compressed gas. The other components of the unit are mounted to a handcart including a frame and wheels to facilitate movement of the unit. In a preferred embodiment, unit is configured for self-evacuation by use of the pump in order to avoid cross-contaimination of different refrigerants during subsequent use of the unit.

Abstract: A liquid refrigerant transfer system includes a low-pressure liquid refrigerant pump coupled by drain hoses between a refrigeration system liquid refrigerant service or drain fitting and a liquid refrigerant storage tank. Another hose couples the refrigerant storage tank with a vapor refrigerant service or fill fitting of the refrigeration system. Preferably, a quick disconnect coupling is provided at least between the drain hose and the refrigerant storage tank to facilitate the removal of the filled tank and the substitution of a second, empty tank to continue the transfer. The vent hose carries liquid refrigerant vapor and any liquid refrigerant overflow back into the refrigeration system, thereby permitting substantially unattended use of the system. The system can be used to transfer liquid refrigerant back from the storage tank back into the refrigeration system through the drain opening.

Abstract: A refrigerant reclamation system for a refrigeration system having a refrigerant therein. The system includes a pump for removing refrigerant from the refrigeration system. The pump is driven by a pneumatic motor. The pump has a first mode of operation for removing refrigerant in a substantially liquid phase and a second mode of operation for removing refrigerant in a substantially gaseous phase. A refrigerant heat exchanger for cooling refrigerant passing therethrough is in fluid communication with the pump. A refrigerant recovery container is connected to the heat exchanger for receiving the cool refrigerant therefrom. A compressed gas drives the pneumatic motor so that the pump removes refrigerant from the refrigeration system and is passed through the heat exchanger.