An air conditioning economizer includes a compressor, a condenser, a metering device, an evaporator generating condensed water during operation, a refrigerant pipe and a textile member. The refrigerant pipe is a loop pipe interconnecting the compressor, the condenser, the metering device and the evaporator, and includes a supercooling section interconnecting the condenser and the metering device. The textile member is capable of transferring moisture, is quick drying, covers the supercooling section and the metering device, and is adapted for absorbing the condensed water.