What are the functions of the omnidirectional cooling holes of the muffle furnace?

We all know that the internal temperature of the high-temperature muffle furnace is extremely high, but the surface temperature of the instrument is not required to cause harm to the experimenters. This is a test of the insulation effect and heat dissipation effect of the resistance furnace, and our new muffle furnace is just such a The characteristics of “cold outside and hot inside”. The polycrystalline mullite fiber furnace is used, which has better heat insulation and heat resistance than ceramic fiber. The furnace body is surrounded by heat dissipation holes, so that the excess heat in the furnace can be discharged in time, which greatly extends the use time of the furnace and also ensures the temperature of the furnace door. Touchable.