1. First, in the direction of glass running, the electric heating body is arranged in one section, which is powered on and off at the same time. In order to solve the problem that the heat dissipation is faster at the edge of the furnace than in the middle, the power distribution of each section of electric heating wire is It is big at both ends.
2. Secondly, it is small in the middle (power distribution is controlled by the density of the electric heating spiral tube). Its advantage is that there are few temperature control loops. Only about 20 temperature control loops are needed for one furnace body, which reduces the cost. Low, the electric heating wire can be replaced without stopping the furnace.
3. Finally, but the shortcomings are also obvious, that is, the furnace temperature control accuracy is poor, and it is not easy to adjust when the temperature distribution in the furnace is uneven.