保鲜运输用高压雾化加湿系统湿度调节特性的试验

摘要

A special high pressure humidifying test-bed was established to research the design of humidifying system for the fresh-keeping transportation. The regulation characteristics of high pressure humidifying system were studied. The effects of airflow velocity, ratio of open area and length of the return air path on the characteristics of humidify efficiency and humidity distribution were analyzed. Some relationships were found out. According the calculation formula of corrugated carton compression strength, the reliability of the design of pressure room and perforated baffle was demonstrated. The relation between humidify efficiency and airflow velocity, ratio of open area and length of the return air path humidity was nonlinear. At the same airflow velocity and ratio of open area, the longer the return air path, the minor humidity uniformity was. The optimum parameters of the high pressure humidifying test-bed were determined by experiment, which required the ratio of open area was 7.56%, the airflow velocity was 8m/s, the return air path length was 1.5m. The research achievements were instructive to the optimization design of the humidify system for fresh-keeping transportation.%为解决果蔬保鲜运输用高压雾化加湿系统的设计问题,建立了高压雾化加湿系统试验平台.通过改变保鲜箱体中回风道风速、开孔隔板开孔率、回风道长度等,研究各因素对加湿效率和湿度分布的影响,分析高压雾化加湿系统的湿度调节特性.结果表明:设计的保鲜箱体结构有利于加速液滴雾化,防止果蔬包装箱强度降低；高压雾化加湿系统加湿效率与风速、开孔率呈非线性关系；在风速和开孔率相同的情况下,回风道越长,保鲜室内湿度分布越均匀；确定开孔率为7.56％,风速为8m/s,回风通道长度为1.5 m为试验平台较优的工作参数组合.研究结果对保鲜运输用高压雾化加湿系统的设计具有一定的参考价值.