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Working principle of PID adjustment of box-type resistance furnace

Working principle of PID adjustment of box-type resistance furnace

Box-type resistance furnaces are used in laboratories, industrial and mining enterprises, scientific research units, and universities for element analysis and determination and for heating of general small steel parts in the quenching, annealing, and tempering heat treatment. The high-temperature furnace can also be used for sintering, dissolving, and dissolving metals and ceramics. For high temperature heating such as analysis.

Box-type resistance furnaces are generally commonly used in position adjustment and PID adjustment. Because the quality indicators of furnace temperature adjustment such as transition time, oscillation frequency, oscillation amplitude, static difference, etc. will affect the uniformity of the furnace temperature, PID adjustment indicators are better than those of position adjustment. Therefore, the PID control furnace temperature uniformity is better than the position control furnace temperature uniformity.

Let’s get to know the other characteristics of the box-type resistance furnace:

1. The shell is made of high-quality cold-rolled steel plate, and the surface is sprayed with plastic process. The furnace door adopts a side-opening structure, which is flexible to open and close.

2. The box-type resistance furnace adopts a closed furnace hearth. After the heating element is made into a spiral shape with electric heating alloy wire, it is coiled in the four walls of the hearth, and the furnace temperature is uniform during heating to extend the service life.

3. The resistance furnace adopts a high-temperature combustion tube, and the silicon carbide rod is used as the heating element to be installed in the furnace jacket.

4. The box-type resistance furnace uses silicon carbide rods as heating elements, which are directly installed in the furnace, and the heat utilization rate is high.

5. This series of resistance furnace insulation materials are made of lightweight foam insulation bricks and aluminum silicate fiber cotton to reduce heat storage and thermal conductivity, resulting in large heat storage in the furnace and shortening the heating time, low surface temperature rise, and low empty furnace loss rate. The power is also greatly reduced.

6. ​​The high-temperature muffle furnace controller is divided into: pointer type, intelligent type, and microcomputer multi-band temperature control type.