DRYING APPARATUS USING HEAT PUMP

摘要

The present invention relates to a drying apparatus using a heat pump which includes a drying chamber for drying agricultural products or marine products. The inside of the drying chamber comprises the following: a blower which circulates air inside the drying chamber; an inner evaporator which liquefies steam inside the air by using a coolant absorbing heat and taking external heat, and dehumidifies the air; a compressor which is connected to the inner evaporator, and compresses the evaporated coolant; an inner condenser which is connected to the compressor, and emits the heat to the outside by the condensing of the coolant; and an inner expansion valve which expands the condensed coolant. The outside of the drying chamber comprises the following: an outer expansion valve which expands the coolant condensed inside the inner condenser; and an outer evaporator which evaporates the coolant passed through the outer expansion valve, and transfers the coolant to the compressor. The coolant does not pass through the inner and outer evaporators at once, and selectively passes through one of the inner and outer evaporators for rapidly increasing the air temperature inside the drying chamber when the inner temperature of the drying chamber is lower than the preset temperature.