| 摘要 |
PURPOSE: A refrigerant circulation circuit of an air conditioner is provided to prevent deterioration of cooling performance due to increase of pressure. CONSTITUTION: A recovery tank(21) is installed to recover or supply circulating refrigerant. A microprocessor(24) is installed to control refrigerant in the recovery tank. A recovery pipe(22) is branched from a refrigerant circulation pipe(16) on a high pressure side between a dry tank(13) and an expansion valve(14) and is connected to one side of the recovery tank. A supply pipe(23) is branched from the refrigerant circulation pipe on a low pressure side between an evaporator(15) and a compressor(11) and is connected to the other side of the recovery tank. A temperature sensor(25) installed on the evaporator, a low pressure sensor installed between the evaporator and the compressor, a high pressure sensor(27) installed between the compressor and a condenser(12) and a low pressure sensor(26) installed between the condenser and the dry tank are connected to an input side of the microprocessor. An opening and closing valve(31) installed on the recovery pipe and an opening and closing valve(32) installed on the supply pipe are connected to an output side of the microprocessor.
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