Solution defrosting and freezing regeneration technology of air-source heat pumps

Aiming at the problems of heating performance attenuation and low reliability of air-source heat pump caused by frosting and defrosting, presents an air-source heat pump system based on solution defrosting and freezing regeneration. According to the solution chemical potential theory, analyses the mechanism of solution defrosting and freezing regeneration. Designs an air-source heat pump system with solution defrosting and freezing regeneration. Determines the kind of defrosting solution and the application concentration range, and develops an experimental platform. The experimental test results show that in a frosting/defrosting cycle, the average heating performance coefficient and capacity of the solution defrosting and freezing regeneration method are increased by 11.3% and 16.5% respectively, compared with the conventional reverse circulation defrosting method, and the continuous heating can be realized.