Solar energy and air source heat pump combined hot water supply system

The invention relates to a solar energy and air source heat pump combined hot water supply system, and belongs to the technical field of energy-saving technologies. The system is provided with a firstwater tank, a second water tank, a solar heat collector and an air source heat pump, and a solar energy and air source heat pump heating system is formed, and sensor technologies such as a temperature sensor and a pressure sensor are matched; under normal condition, when the solar energy plays a role, the air source heat pump is turned off, so that the solar energy can be automatically used for heating to the maximum extent; and when illumination is insufficient or during rainy days, the solar energy is turned off and can be switched to the air source heat pump for heating, so that all-weather hot water heating of a hot water system is realized; and compared with a traditional hot water system, the solar energy and air source heat pump combined hot water supply system is more energy-saving and environment-friendl