Description of control system in far infrared electric heater
The first type of plan is shown. It is actually born out of the conventional appearance, that is, the Huiji system replaces the conditioning path in the appearance system. It can be said that this is a hybrid system. Its main advantage is that it is easy to connect with the appearance system, and it is easy to complete the switch between the watch-only system and the Huiji system. This is beneficial for completing the transformation of the appearance system in a short time. However, plans like electric heaters have significant flaws. The first is that there are more equipment used and the system is messy. The cost is higher; second, because the output channel has many conversion links (especially after the analog conversion, the nonlinearity is more serious, the anti-interference performance is poor, and the control accuracy is low; Third, the reliability of the system is poor.
The second type of plan is shown. In this type of plan, the output terminal removes D/A conversion, voltage signal expansion, power frequency high voltage pulse signal conversion and other links, and directly uses TTL level pulse signals to control the on and off of solid state relays, and the solid state The relay controls the on and off of the electric heater. It can be said that this type of plan basically overcomes the shortcomings of the first type of plan and gives full play to the advantages of microcomputer skills. The electric heater can not only reduce costs with a large degree, but also greatly improve the control accuracy (at room temperature to 720°C). Within the range, the control accuracy is better than 0.5℃). In addition, its anti-jamming function and reliability are better than those of the first type.