Air-cooled heat pump evaporation spraying system controlled through supercooling degree and method thereof

The invention discloses an air-cooled heat pump evaporation spraying system controlled through supercooling degree and a method thereof, the system comprises a refrigerating system and a spraying system, and an atomizing nozzle of the spraying system is aligned with a condenser of the refrigerating system. The spraying system comprises a water storage tank, an electronic water treatment instrument, a constant pressure pump, a countercurrent heat exchanger A, a countercurrent heat exchanger B and an atomizing nozzle which are sequentially connected with a water outlet of the water storage tank through a pipeline, an outdoor environment temperature sensor, and an exhaust temperature sensor mounted on an exhaust port pipeline of the compressor; the upstream temperature sensor and the pressure sensor are installed on a pipeline in front of the electronic expansion valve, and the constant pressure pump, the environment temperature sensor, the exhaust temperature sensor, the upstream temperature sensor and the pres