Abstract
Considering the problems such as long duration of defrosting, low working reliability and high energy consumption of refrigerated containers, this paper put forward a new defrosting method combining air and electro-thermal energy, and designed a new defrosting structure system based on the structural features of refrigeration modules of refrigerated containers. The two-variable method of wind pressure change and temperature difference change on both sides of the evaporator was used to detect frosting, and the specific controlling strategy supporting the new defrosting system was provided to realize the effect of intelligent defrosting. It can provide references for fast defrosting, intelligent defrosting and low energy consumption defrosting of refrigerated containers.
Highlights
At present, the infrastructure and supervision system of cold chain logistics in China have been continuously perfected, and the cold chain circulation rate of perishable goods has been rapidly enhanced
According to the data released by the 2018 Cross-border Food Supply Chain Forum of the China Federation of Logistics & Purchasing Cold Chain Logistics Committee, China's frozen and refrigerated containers will maintain a compound annual growth rate of about 7%, ranking the top in the world
The defrosting system designed for refrigerated containers of mainstream brands in the market still has problems such as long duration of defrosting, low working reliability and high energy consumption, which restrict the development of highquality transportation, low-cost transportation and green cold chain transportation of refrigerated containers
Summary
The infrastructure and supervision system of cold chain logistics in China have been continuously perfected, and the cold chain circulation rate of perishable goods has been rapidly enhanced. As an important tool for transportation of cold chain logistics, refrigerated containers have achieved steady growth. The defrosting system designed for refrigerated containers of mainstream brands in the market still has problems such as long duration of defrosting, low working reliability and high energy consumption, which restrict the development of highquality transportation, low-cost transportation and green cold chain transportation of refrigerated containers. With the corresponding controlling strategy, the system can enable refrigerated containers to defrost on demand, intelligently and efficiently, reduce the impact of temperature fluctuation in the refrigerated container caused by defrosting operation, increase the accuracy of temperature control in the refrigerated container, lower the odds of energy consumption in defrosting and the damage to perishable goods, and improve the quality of refrigerated transportation
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