What role does UV LED light play in refrigerators?

The storage quality and nutritional components of spinach and chives maintains well after UV LED light irradiation. A typical characteristic of leaf senescence is the changes of chlorophyll content . During leaf senescence, the chlorophyll content in tissues decreases significantly. The study found that LED UV treatment can delay the decrease in chlorophyll content in the leaves of spinach and chives. Enzymes can cause the decomposition and destruction of chlorophyll during plant senescence and storage. UV LED irradiation can inhibit the activity of enzymes and slow down the rate of chlorophyll decomposition so improve the retention rate of chlorophyll.

Vegetables contain enzymes that promote the oxidation of vitamin C, so vitamin C will gradually oxidize and decrease during storage. And the rate of decrease is closely related to storage conditions. Additionally, the inherent instability of vitamin C leads to significant losses during storage. However, ultraviolet LED irradiation can inhibit the activity of oxidases, slow down the oxidation rate of vitamin C, and thereby enhance the retention rate of vitamin C.

Similarly, changes in the content of soluble proteins in vegetables are also related to enzymatic activities and respiratory intensity, for example, peroxidase can decompose and damage proteins, thereby affecting the nutritional value of vegetables. Therefore, ultraviolet irradiation can extend the shelf life by inhibiting the activity of enzymes, suppressing the respiratory intensity of vegetables, and reducing the consumption of nutrients such as soluble proteins. 

The LED UV light in refrigerators can emit ultraviolet rays with the wavelength of 265nm, which are most easily absorbed by the proteins and nucleic acids of bacteria and viruses. It can cause proteins to denature and dissociate form thymine dimers in nucleic acids. And it also can destroy the DNA and RNA structures of various viruses and bacteria, thereby killing bacteria and viruses within a few seconds. The sterilization efficiency is as high as 99%,which can kill bacteria that cannot be killed by other disinfection methods. So installing UV LED lights in refrigerators can use air circulation to sterilize the air in the refrigerator's cold storage compartment, thus purifying the food storage environment.

Qingdao Yingguang UV disinfection series products mainly include air sterilization, surface sterilization, water sterilization, and medical sterilization. The company has professional postdoctoral team dedicated to the research on UV sterilization applications. The company has obtained a number of national invention patents and utility model patents after years of efforts in the UV industry. A variety of sterilization module products have been put on the market currently. For more details, you can browse the company's website at www.uvworks.com.cn to contact the company for information or follow the WeChat official account.