Method and system for improving heat exchange efficiency of outdoor heat exchanger

The invention provides a method and system for improving the heat exchange efficiency of an outdoor heat exchanger. The method comprises the following steps that the original outlet temperature of a refrigerant medium at an outlet of each outdoor heat exchange assembly in the outdoor unit is obtained; and on the basis of the original outlet temperature of the refrigerant medium at the outlet of each outdoor heat exchange assembly, the flow of the refrigerant medium shunted to the inlet of the outdoor heat exchange assembly is adjusted till the current outlet temperature of the refrigerant medium at the outlet after adjustment of each outdoor heat exchange assembly is consistent. According to the invention, the flow of the refrigerant medium shunted to the inlets of the outdoor heat exchange assemblies is adjusted until the current outlet temperatures of the refrigerant medium at the outlets are consistent after the outdoor heat exchange assemblies are adjusted, so that the heat exchange efficiency of each out