US Patent 9500396 Oil separator and air conditioner using the same

An oil separator and an air conditioner using the same are provided. The air conditioner may include at least one indoor unit connected to an outdoor unit by a refrigerant tube. The outdoor unit may include a compressor and an oil separator including a plurality of oil recovery tubes introducing oil into the compressor. The oil separator may include a housing, a suction tube guiding oil-mixed refrigerant into the housing, a discharge tube discharging refrigerant separated from the oil-mixed refrigerant, and first and second recovery tubes discharging oil separated from the oil-mixed refrigerant. At least one of the first or second recovery tubes may include an oil valve guiding a movement direction of the oil.