The working principle of the air fryer is "high-speed air circulation technology", it is through the high temperature heating machine inside the heat pipe to produce hot air, and then use the fan to blow the high temperature air to the pot to heat the food, if the use of tinfoil, it will seriously affect the thermal efficiency, so the air fryer baked sweet potatoes don't put tinfoil.

Sweet potato is a nutritionally complete and rich natural tonic food, containing protein, fat, polysaccharides, phosphorus, calcium, potassium, carotene, vitamin A, vitamin C, vitamin E, vitamin B1, vitamin B2 and 8 kinds of amino acids. According to scientists' analysis, its protein content is more than 7 times that of rice; the content of carotene is 3.5 times that of carrots; the content of vitamin A is 100 times that of potatoes.