The difference between power control heating and temperature control heating
Regardless of whether heating is controlled by power output or heating by temperature, the common point is that a temperature sensing element and a thermostat are needed to adjust temperature changes.
The difference between the two is:
A. Power control heating is controlled by the thermostat to control the input and output signals, and the heating power of the heater is adjusted by the thyristor to control the heating capacity of the heating system. When the temperature value of the heating system is far lower than the set value, the SCR full power output, and the heater is in full power working state. When the temperature of the heating system is close to the set value, the power output of the thyristor will become smaller and smaller. Once the temperature reaches the set value, the power output of the SCR is zero. Heating through power control, on the one hand, is more energy-saving, on the other hand, the temperature control accuracy is high, which can reach ±0.4℃. The cost of a temperature control system that uses power to control heating is relatively high.
B. Temperature control heating Generally, the contactor controls whether the heater is heating or not. Its output only has two signals, open or closed, that is, the heater can only work at full power or at zero power. Both the energy-saving effect and the temperature control accuracy are worse than the former, and the temperature control accuracy can reach ±1℃. But relatively, the purchase cost of the temperature control system is also lower than the former.
