Air source heat pump and heat supply device

The invention relates to the technical field of air source heat pumps, and discloses an air source heat pump and a heat supply device.A support is arranged in a shell, and a heat source assembly is arranged on the support and comprises a crankcase, a compression chamber, a motor, a crankshaft, a movable arm, a movable base, a compression rod, a first-stage compression piston, a first second-stage compression piston and a second second-stage compression piston. The evaporator is provided with an output interface and an input interface, the output interface is provided with a pipeline I, the pipeline I is provided with a plurality of pipelines II, the pipelines II are communicated with the compression chamber, the input interface of the evaporator is communicated with the heat exchange pipe, and the compression chamber is communicated with the pipeline III through the pipelines II. The first-stage compression piston primarily compresses a refrigerant in the evaporator, and then the first-stage compression pisto