Air source heat pump water heater with flexible defrosting function

The utility model belongs to the technical field of air source heat pump water heaters, particularly relates to an air source heat pump water heater with a flexible defrosting function, and aims to solve the problems that a shell part of an air source heat pump water heater in the prior art is usually inconvenient to open, so that manual defrosting is inconvenient, and a defrosting structure in the air source heat pump water heater is maintained. According to the scheme, the water heater comprises a water heater shell, the left side of the water heater shell is provided with an opening, and an evaporator and a water tank are fixedly installed in the water heater shell; the rear cover movably abuts against the left side of the water heater shell; the defrosting assembly comprises an air heater and two supports, and the two supports are fixedly connected to the top and the bottom of the air heater correspondingly; and the mounting assembly comprises two fixing plates and two inserting plates. The defrosting wor