| 摘要 |
PURPOSE:To make it possible to perform a dehumidifying operation without any fault under low-temperature environments with a high efficiency and to practice dehu midification while suppressing the lowering of the room temperature by preventing a vaporizer at the time of operating the air conditioner in a dehumidifying mode utilizing a freezing cycle. CONSTITUTION:A bypass circuit 6 which bypasses a condenser 2 and a pressure reduc ing turn-down mechanism 3 to connect an outer side pipeline 1a of a compressor 1 to an inlet side pipeline 4a of a vaporizer 4 is provided in a coolant circuit. A switching valve 7 keeping its closed state during the space cooling mode operation, is disposed in the bypass circuit 6. Further, the air conditioning control system comprises timing means 18 for setting the period of a dehumidifying mode during the dehumidifying mode operation; timing means 19 for ON/OFF controlling the com pressor 1 in every period of the dehumidifying mode; timing means 20 for starting the operation of a blower 5 with a preset time lag after starting the operation of the compressor; timing means 21 for stopping the operation of the blower before the stoppage of the operation of the compressor; and timing means 22 for controlling to open the switching valve 7 of the circuit 6 in a period from the time of stopping the operation of the blower to the time of starting the resumptive operation at the time of the dehumidifying mode operation of the compressor.
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