In 2022, Omicron will spread around the world, and the new crown epidemic will enter another round of peaks. Injecting the new crown vaccine is still one of the most powerful means of protection. But vaccine production is not evenly distributed around the world, and many impoverished regions need international assistance to complete the vaccinations. As we all know, vaccines need to be stored in a low temperature environment. How to ensure qualified storage and transportation in remote areas with poor infrastructure, such as African countries, has become an important issue. Vaccine refrigerators are widely used in terminals as a portable and independent storage device.