As a key equipment for low-temperature green grain storage,the grain cooler adopts mechanical refrige-ration,overcoming the limits of environmental conditions for natural ventilation and fan ventilation,it could provide cold air with constant temperature and humidity for the grain pile at any time.After more than 20 years'develop-ment,products with various refrigeration capacity specifications have been developed to meet the needs of different types of grain silos.Its COP value has also increased from less than 1.3[1]for imported equipment to over 2.0.In recent years,grain cooler has continuously improved in single machine product technology.in terms of the informa-tization,it can also realize remote control and unattendance,through computer software and mobile applications.But the integrated linkage control operations still need further research to achieve complete intelligent ventilation op-erations.This article had introduced the development of domestic grain cooler in terms of function,structure,per-formance,control and other aspects,analyzed the current research of new refrigeration technology,and putted for-ward the outlook of the research and innovation direction.In order to provide reference for the application and re-search of the equipment.
low temperature green grain storagegrain coolerrefrigeration technologiesinformatization
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