摘 要：为提高热泵干燥装置的节能效率，设计并研制了能够对干燥室排出的高温气体进行余热回收的热泵干燥装置，并对其进行了性能测试。采用可编程控制器对热风的温度、湿度和风速进行调节，并可对干燥室排出的废热进行回收利用。利用该热泵干燥装置对香菇进行的干燥实验表明：该热泵出风口温度可达65 ℃，干燥室内温度分布均匀；与电加热干燥装置相比，该装置的干燥时间可缩短5~7 h，每度电的处理量提高了2.3倍，并且提高了干燥品质。

Abstract:To enhance the energy-saving efficiency of devices for drying heat pumps,a heat-pump-drying device capable of recovering waste heat from gases at high temperatures discharged from the drying chamber was designed and developed with its performance being tested.Programmable logic controllers were adopted to regulate the temperature,humidity and air speed of the hot wind and maximally recover and utilize the waste heat from the drying chamber.The results of shiitake mushroom tested through drying by using the heat pump drying device in question show that the temperature at the outlet of the heat pump can reach 65 ℃ and the distribution of the temperature inside the drying chamber is uniform.Compared with an electrically heated drying device,the drying time duration of the heat pump by using the device in question can be shortened by 5 to 7 hours with the amount of heat treated by electricity of each kilowatt-hour being enhanced by 2.3 folds and the drying quality being also improved.

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上海市教委科研创新项目（14ZZ133）；上海市联盟计划（LM201652）