为解决果蔬气调保鲜运输过程中通风系统能耗高、果蔬干耗损失大等问题,该文建立了保鲜运输变频通风试验平台.通过改变风机频率,研究厢体内不同通风量对液氮充注气调、制冷、超声波加湿和换气等装置的工作性能调节特性,基于满足果蔬保鲜要求和能量消耗低的原则,优化了液氮充注气调、制冷、超声波加湿和换气等装置工作的风机频率.设计了气调保鲜运输变频通风系统,并通过试验与定频通风系统进行了能耗对比,试验结果表明:变频通风系统能够满足果蔬保鲜要求,且总能耗比定频通风系统节约15.2％,风机能耗比定频通风系统的风机能耗低81.8％.气调保鲜运输变频通风系统的设计,对提升果蔬气调保鲜运输技术水平具有一定的参考价值.%To resolve the high energy consumption present in ventilation system and vast weight loss in fruits and vegetable during fresh-keeping transportation, an experimental platform with frequency conversion ventilation system and controlled atmosphere system was established. The frequency of ventilator was altered to research the regulating characteristics of variable air volume on working performance of devices including liquid nitrogen injecting equipments, refrigerator, ultrasonic humidifier and air interchanger. To meet the fruit and vegetable fresh-keeping requirements and minimize energy consumption, the ventilator frequency was optimized for improving the work performance of the devices. Frequency conversion ventilation system was designed, and the energy consumption of fixed frequency ventilation system and measurement were compared. The results indicated that frequency conversion ventilation system could meet fruit and vegetable fresh-keeping requirements, and the energy consumption of which was less than fixed frequency ventilation system at 15.2%. The energy consumption of frequency conversion ventilator was less than fixed frequency ventilator at 81.8%. The design on frequency conversion ventilation system could provide a reference for the improvement of fresh-keeping transportation technology with controlled atmosphere.
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