小型冷库连续热气除霜结束时间研究  

End time of continuous hot gas defrosting in small cold storage

作　　者：宁璐璐 刘清江[1] 王希龙 Ning Lulu;Liu Qingjing;Wang Xilong(Key Laboratory of Tianjin Refrigeration Technology,School of Mechanical Engineering,Tianjin University of Commerce)

机构地区：[1]天津商业大学机械工程学院天津市制冷技术重点实验室

出　　处：《制冷与空调》2022年第4期54-57,共4页Refrigeration and Air-Conditioning

摘　　要：为了探索冷库在连续热气除霜过程中结束除霜的评价指标,建立不同压缩机频率下除霜蒸发器进出口温差数学模型,并根据蒸发器除霜时间及过冷度,计算除霜蒸发器进出口温差,从而判断蒸发器结束除霜的时间。研究结果表明:在连续热气除霜系统中,除霜蒸发器进出口温差随除霜时间的增加呈现先增大后减小的趋势,除霜蒸发器的进出口温差达到最大值时是结束除霜的最佳时间。该研究为冷库连续热气除霜结束除霜提供评价数学模型。In order to explore the evaluation index of the end of defrosting during continuous hot gas defrosting process in cold storage,a mathematical model of the temperature difference between the inlet and outlet of defrosting evaporator at different compressor frequencies is established.According to the defrosting time and subcooling degree of the evaporators,the temperature difference between the inlet and outlet of the defrosting evaporator is calculated to estimate the defrosting end time of the evaporator.The study results show that the temperature difference between the inlet and outlet of the defrosting evaporator increases first and then decreases with the increase of defrosting time in the continuous hot gas defrosting system.It is found that the best time to end defrosting is when the temperature difference between inlet and outlet of the defrosting evaporator reaches the maximum.The evaluation mathematical model is provided for the continuous hot gas defrosting in cold storages.

关 键 词：冷库 连续热气除霜 结束除霜 蒸发器 数学模型 

分 类 号：TB6[一般工业技术—制冷工程]