Air curtain with exhaust heat recovery function

The utility model discloses an air curtain with an exhaust air heat recovery function, which comprises a fan, a compressor, an air supply outlet arranged above a door and an exhaust outlet arranged below the door, the air supply outlet and the exhaust outlet jointly form a complete air flow direction, and a condenser for heating indoor air is arranged on the upper portion of the air supply outlet. An evaporator used for recycling heat of exhaust air is arranged on one side of the exhaust outlet, the condenser and the evaporator are connected through a pipeline, the pipeline is filled with refrigerants, the refrigerants evaporate and absorb heat under the action of the evaporator so as to recycle the heat of the exhaust air, and a compressor is further arranged between the condenser and the evaporator. By means of the device, indoor exhaust waste heat can be effectively utilized, the exhaust waste heat serves as a low-level heat source, and the air supply temperature of the heating air curtain is increased by