The temperature control adopts a high and low temperature two-level regulator for program control. The high temperature drying/insulation time/low temperature insulation in the drying room are set once, and the high and low temperature automatic transition function is realized. When the transition is to low temperature, it can be removed for welding, which is very simple and convenient. Two temperature values for drying and insulation can be set at once, and the drying time can be set. The inner liner and shelf are made of corrosion-resistant stainless steel material and high-quality steel plate. Please specify when selecting. The upper limit working temperature is 500 ℃.