【摘要】 设计一种可以实现低成本批量高温干燥加工和低温保鲜农产品的小型两用热泵系统。系统改良了保温房的结构,将干燥室和冷库合二为一;采用了排湿和循环一体的新型风道。由于选用混合型制冷剂,热泵变温范围可达5~75℃,山药烘干和桑椹冷藏的试验结果表明:系统整体运行稳定,在干燥模式时其升温极限高,脱水速率快,在低温保鲜模式时的制冷和保温效果好,达到了设计要求。更多还原

【Abstract】 A small drying and refrigerating dual-purpose heat pump system for batch processing agriculture products was developed.The system was featured with low cost,improved structure of insulated room and new wet discharge-cycle air duct.heat pump selection of mixed refrigerant aimed at the drying highest temperature and the lowest refrigeration temperature respectively was 75 ℃ and 5 ℃.These reach results demonstrated that the system was stable,meet the design requirements of the high limit temperature and dehydrate rate in dry heating mode,and work well in keep-fresh mode.更多还原