| 摘要 |
PROBLEM TO BE SOLVED: To provide a dryer which is operated in a stable refrigeration cycle and realizes shortening of drying time and reduction of electric power consumption amount, that is energy saving, and operation method thereof. SOLUTION: The dryer is provided with a heat pump device which has a main circuit in which cooling medium circulates through a compressor 1, a condenser 2, the first wringing device 3A, a gas-liquid separator 4, the second wringing device 5 and an evaporator 6 in sequence and a bypassing circuit 8A which flows from the upper part of the gas-liquid separator 4 to the compressor 1 through a flow control valve 7. The air heated with the condenser 2 is led to a drying chamber 11, the hot air dries dry material 10 in the drying chamber, the evaporator 6 dehumidifies the air which gets humid by the drying and the dehumidified air is heated with the condenser 2 again. Since the condenser potential and the evaporator potential or the like can be controlled to be equal by having a flow rate control means 14 to control opening of the flow control valve 7 and adjusting the opening of the flow control valve 7, the heat pump device can be operated in a stable refrigeration cycle without conventionally discharging excessive amount of heat outside. COPYRIGHT: (C)2006,JPO&NCIPI
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