A refrigeration cycle is formed by connecting a four-way valve, a compressor, an outdoor heat exchanger, and an expansion device in which the expansion means is connected in series, and an indoor machine connected with a pipe expansion device and an indoor sleeper exchanger through a liquid refrigerant piping and a gas refrigerant pipe, and in the refrigeration cycle The flow in the liquid refrigerant pipe is always in the two-phase flow during the operation of the refrigeration cycle, and the moisture absorption means is provided in the two-phase flow. The working refrigerant is an HFC refrigerant which preserves the global environment, and lubricating oil such as an ester system is used as the working oil. Since the moisture absorption means is provided in the gas-liquid two-phase flow, the water absorption can be performed in the liquid phase, and the function of the gas refrigerant can be classified so as to flow quickly, so that an air conditioner of high reliability and a water removing apparatus used in the same can be obtained.
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