AIR CONDITIONING SYSTEM, COMPOSITE CONDENSER, AND OPERATION CONTROL METHOD AND DEVICE FOR AIR CONDITIONING SYSTEM

摘要

An air conditioning system comprises: a compressor (1), a condensing coil (21), a throttle element (3), a liquid pump (6), an indoor unit (7), a natural cooling coil (22), an intermediate heat exchanger (4), and a three-way valve (5). The intermediate heat exchanger (4) has an evaporation side (41) and a condensing side (42). The compressor (1), the condensing coil (21), the throttle element (3), and the evaporation side (41) are sequentially connected to form a first closed-loop structure. The liquid pump (6), the indoor unit (7), and the condensing side (42) are sequentially connected to form a second closed-loop structure. The three-way valve (5) is provided on a pipeline between the indoor unit (7) and the condensing side (42), and comprises a first valve port (51), a second valve port (52), and a third valve port (53). The first valve port (51) is connected to an outlet of the indoor unit (7). The second valve port (52) is connected to an inlet of the condensing side (42). The third valve port (53) is connected to an inlet of the natural cooling coil (22). An outlet of the natural cooling coil (22) is connected to the inlet of the condensing side (42). A composite condenser and an operation control method and device for the air conditioning system are also provided. The system of the invention improves an annual energy efficiency ratio of air conditioners, decreases energy consumption of air conditioners, and solves the problems of water leakage and oil return of large air-conditioning systems, thereby enhancing reliability.