Photovoltaic loop heating pipe assisted twin-heat-source heat-pump heat supply system

Provided is a photovoltaic loop heating pipe assisted twin-heat-source heat-pump heat supply system. The photovoltaic loop heating pipe assisted twin-heat-source heat-pump heat supply system mainly comprises a solar/air evaporator, a pipeline A, a valve A, a pipeline B, a compressor, a pipeline C, a pipeline D, a condenser, a valve C, a pipeline E, a solar photovoltaic-loop heating pipe evaporator, a pipeline F, a valve D, a pipeline G, a pipeline H, a valve B and a capillary tube. According to the operation mode of a heat pump, solar energy and air are adopted as heat sources, the defect that an air source heat pump has low operation efficiency or can not operate in a low temperature environment is overcome, and the problem that the area of a heat collector in a common solar auxiliary heat-pump heat supply system is too large is solved; by arranging the evaporator in the loop heating pipe mode and the evaporator in the heat pump mode in a split mode, mismatch between the condenser and the evaporators when th