Oil-gas separation and recovery device and air blower

The utility model discloses an oil-gas separation and recovery device and an air blower, the air blower is provided with the oil-gas separation and recovery device at an exhaust port of an oil tank of a gearbox, and the oil-gas separation and recovery device comprises an exhaust part and a separation assembly; the exhaust part communicates with the oil tank and the separation assembly and is used for transmitting oil gas and/or oil mist exhausted by the oil tank to the separation assembly. The separation assembly comprises a separation part and an oil return pipe which are vertically communicated, the separation part is used for conducting gas-oil separation on oil gas and/or oil mist, and the oil return pipe is used for enabling separated oil to flow back to the oil tank. Gear oil in oil mist volatilized at high temperature is effectively recovered into the oil tank through the oil-gas separation and recovery device, the oil-gas separation and recovery device is applied to an air blower, gear oil loss is red