What is the insulation function of Beiding steamer?

The heat preservation function of Beiding steamer is 80 degrees, the stewing temperature is controlled at 100 degrees, and the heat preservation temperature is 80 degrees. Steamed rice takes 250 seconds in a steamer or 12 minutes in a steamer, while soup takes 35 minutes. The whole process, without flame, is very safe. The modern means of "steaming" kung fu is that the steam pressure can be adjusted according to the "temperature" that is difficult to grasp. The cooking temperature is controlled at 100℃ and the holding temperature is 80℃. Steamed rice takes 250 seconds in a steamer or 12 minutes in a steamer, while soup takes 35 minutes.