Why is the difference between the displayed temperature and the actual temperature so big?

Because we use a built-in thermal sensor. The thermal sensor is placed at the location of the heat source, detects the temperature in real time and feeds back to the IC of the motherboard, and then transforms it into a numerical value through the panel display, that is, the temperature we see on the display. The actual temperature is the temperature felt by the human body, from the heat source through the fireproof layer, waterproof layer, insulation, (if the capsule but also conduction to the air) and then finally be felt by the human body, so the display temperature is the temperature of the heat source, we said the actual temperature is the human body to feel the temperature, not in the same place, so there will be a temperature difference. Want to feel the temperature and display the same temperature, just need to change to external thermal can be achieved.