Research of the humidity- control property of high- humidity refrigerator and effect on quality of fresh vegetables

In order to explore the changes of temperature and humidity in different refrigerators and the different effects of fresh vegetables during storage,the regular pattern of temperature and humidity variation in refrigerated room of Midea refrigerator BCD-642( humidity type) and BCD-252( ordinary type) were investigated.The changes in the quality of spinach and leeks in the two kinds of refrigerator were also studied during storage. The results showed that the high humidity refrigerator had better property for humidity- control,the humidity was between80.3%~98.7%,average humidity of 93.04%,the temperature was between 3.2 ~3.9 ℃,with an average temperature of 3.5 ℃.High- humidity refrigerator played a significant role for reducing the water content,maintains V_c content and hardness of spinach and leeks.The decrease in dehydration rate of spinach and leeks was 1.5 times and 1.6times in high-humidity refrigerator than in common refrigerator after 12 days of storage.Odour analysis by electronic nose showed that leeks' odor had a significantly difference in a different storage times between each other,as well as spinach,greater than the change of vegetables odor between two kinds of refrigerator at the same storage time,indicating the length of storage time was a major factor in the change of smell of leeks and spinach.And the odor of vegetables was also different between two kinds of refrigerators,which change coincided with the storage quality.