Gas-electric combined water heating device

A cold water supply pipeline is provided with two branch pipes to an air source heat pump module and a hot water combustion heating module respectively, the hot water combustion heating module comprises a combustion heating device, a cold water inlet of the combustion heating device is connected with one branch pipe of the cold water supply pipeline, and the other branch pipe of the cold water supply pipeline is connected with the other branch pipe of the hot water combustion heating module. A hot water outlet pipeline of the combustion heating device is connected with a hot water supply pipe,and the combustion heating device is further provided with a flue gas exhaust pipeline; the air source heat pump module comprises a hot water heat exchanger, a refrigerant compressor, a liquid storage device, an expansion valve and an air heat exchanger, an outlet pipeline is merged with a hot water outlet pipeline of the combustion heating device and then goes to a hot water supply pipeline, anda cold side inlet of the