小型干燥与低温保鲜两用热泵系统的设计与应用  

Design and application of the mini heat pump system for drying and low-temperature preservation

作　　者：冯道宁[1,2] 孙健[2] 李丽[1] 李志春[2] 盛金凤[2] 

机构地区：[1]广西机电职业技术学院,广西南宁530007 [2]广西农业科学院农产品加工所,广西南宁530007

出　　处：《食品与机械》2017年第2期81-84,共4页Food and Machinery

基　　金：农业部公益性行业(农业)科研专项(编号:201303073-06);国家星火计划项目(编号:2013GA790007)

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。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.

关 键 词：农产品 干燥 低温保鲜 热泵系统 

分 类 号：TS255.35[轻工技术与工程—农产品加工及贮藏工程]