Water pan set, outdoor unit and heat pump water heater

The utility model belongs to the technical field of household appliances, and particularly relates to a water pan set, an outdoor unit and a heat pump water heater, the water pan set comprises a water pan, an evaporator and a positioning piece, a supporting surface is formed on the water pan, and a flow guide surface is formed on the supporting surface; the evaporator is connected to the supporting surface; the bottom end of the evaporator is in contact connection with the flow guide surface; the positioning piece comprises a positioning vertical part and a positioning bottom part which are in angular connection, a supporting bottom surface matched with the inclination of the flow guide surface is formed on the positioning bottom part, and a limiting vertical surface in contact connection with the inner wall of the evaporator is formed on the positioning vertical part; condensate water generated by the evaporator is directly discharged to the outside from the flow guide face, condensation of the condensate wa