High-efficiency cooling system of air conditioner

The utility model discloses a high-efficiency cooling system of an air conditioner and relates to the technical field of air conditioner production. The high-efficiency cooling system comprises a compressor, a condenser, a filter, a throttler and at least two evaporators in series connection, wherein the evaporators in series connection are connected between an outlet end of the throttler and an inlet end of the compressor through connecting pipes. The high-efficiency cooling system of the air conditioner has the advantages that low-temperature cooling agents, at the temperature of not more than 18 DEG C, obtained by evaporation of the first evaporator is further evaporated by the second evaporator, the high-efficiency cooling system does not waste low-temperature energy obtained by evaporation of the first evaporator, and one outdoor main unit and two or more than two indoor units are adopted only with outdoor main units not added, so that one driving two (or three) is realized truly; the two or more than two indoor units can be arranged at different indoor positions of a room and can also be arranged in different rooms, so that indoor air can circulate and exchange sufficiently to enable indoor temperature to be uniform.