Heat-accumulating solar energy and heat pump combined drying device capable of realizing multi-mode operation

Abstract

The invention discloses a heat-accumulating solar energy and heat pump combined drying device capable of realizing multi-mode operation. The device consists of an air heat collector, a compressor, a condenser, an expansion valve, an evaporator, a refrigerant pipeline, a heat accumulator, a circulating fan, a draught fan, an exhaust fan, a drying room, an air pipe, a valve and a tee joint. The device can realize continuous drying operation under different whether conditions, and realizes seven operational modes, namely an air heat collector heat supply and heat accumulation mode, an air heat collector heat supply mode, a heat accumulation mode, a heat accumulator heat supply mode, a heat pump dehumidification mode, a heat pump dehumidification and heat accumulation mode and a heat pump heat supply mode according to process requirements. The seven operational modes can be switched according to comprehensive requirements on climatic conditions and a drying process. The device has the advantages of pollution-free drying process, maximum utilization of solar energy and continuous and stable drying process.

Description

technical field [0001] The invention is a thermal storage type solar energy and heat pump combined drying device capable of realizing multi-mode operation, belonging to the field of agricultural and sideline product drying. Background technique [0002] At present, the drying and processing methods of agricultural and sideline products are mainly hot air drying, which relies on burning coal, petroleum and other fossil fuels to provide heat. On the one hand, the pollution is serious, and on the other hand, it is difficult to improve the drying quality. With the further intensification of energy and environmental problems, various drying devices using solar energy and heat pumps as heat sources have emerged. However, due to the instability of solar energy, it is difficult for solar drying devices to ensure the continuity and stability of the drying process; The low-temperature drying stage has good economic efficiency, but it is difficult to meet the requirements of heating an...

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Problems solved by technology

[0002] At present, the drying and processing methods of agricultural and sideline products are mainly hot air drying, which relies on burning coal, petroleum and other fossil fuels to provide heat. On the one hand, the pollution is serious, and on the other hand, it is difficult to improve the drying quality.

With the further intensification of energy and environmental problems, various drying devices using solar energy and heat pumps as heat sources have emerged. However, due to the instability of solar energy, it is difficult for solar drying devices to ensure the continuity and stability of the drying process; The low-temperature drying stage has good economy, but it is difficult to meet the requirements of heating and dehumidification in the later stage of drying, especially in the high-temperature stage, the COP of the heat pump system drops seriously, and the energy-saving effect is limited

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