Abstract: A refrigerant recovery and recharge device and a method to recharge oil to refrigeration equipment is disclosed. The refrigerant recovery and recharge device comprises a valve block which is adapted to establish fluid communication between the device and refrigeration equipment and a recharge path adapted to recharge oil to the refrigeration equipment through an outlet in the valve block. The device further comprises at least a first oil container and a second oil container and the valve block comprises a valve with a first inlet and a second inlet. The first oil container is in fluid communication with the first inlet and the second oil container is in fluid communication with the second inlet to recharge oil to the refrigeration equipment. The method for recharging oil recharges oil either from the first oil container or the second oil container in dependence of the type of fuel used in the vehicle.

Abstract: A method of measuring weight of the refrigerant recovered and a device for refrigerant recovery and recharge device is disclosed. A connection is established between the refrigerant recovery path and refrigerant recharge path. Refrigerant is filled in the refrigerant recovery path and the refrigerant recharge path. Once the refrigerant occupies the all components of the refrigerant recovery and recharge device, weight of the refrigerant storage tank is measured. The weight of the refrigerant storage tank is measured once before the recovery of the refrigerant from the refrigeration equipment and once after recovery of the refrigerant from the refrigeration equipment. Difference in the weights measured before recovery and after recovery is calculated to a get the amount of refrigerant recovered.

Abstract: A method for recovering refrigerant from an external refrigeration equipment by a refrigerant recovery device includes recovering the refrigerant from the refrigeration equipment in a main recovering process. A small amount of heated refrigerant is recharged into the refrigeration equipment in a temporary refrigerant recharge process. An additional recovering process for emptying of a residual refrigerant from the refrigeration equipment is performed after finishing the temporary refrigerant recharge process.