At present, the heating method used by heating-type equipment such as plastic machinery on the market is generally electric heating ring heating, which transfers heat to the heated body (barrel) through contact conduction. However, only the heat close to the inner side of the barrel surface is effectively transferred to the heated body, while most of the heat on the outer side is dissipated into the air, resulting in heat conduction loss and an increase in ambient temperature. In addition, another disadvantage of resistance wire heating is low power density, which cannot meet the requirements in some high-temperature applications.
Energy saving principle;
At present, the heating method used by heating-type equipment such as plastic machinery on the market is generally electric heating ring heating, which transfers heat to the heated body through contact conduction. However, only the heat close to the inner side of the barrel surface is effectively transferred to the heated body, while most of the heat on the outer side is dissipated into the air, resulting in heat conduction loss and an increase in ambient temperature. In addition, another disadvantage of resistance wire heating is low power density, which cannot meet the requirements in some high-temperature applications. Electromagnetic heating technology makes the metal heated body generate heat itself, and can wrap a certain thermal insulation material outside the heating body according to specific conditions, thus greatly reducing heat loss and improving thermal efficiency. Therefore, the energy saving effect is very significant, reaching 30% to 80% or more.
The electromagnetic heating system consists of two parts: the electromagnetic heating control board and the metal heated body, which makes the heated body generate heat itself. In addition, the power supply can be directly input to the electromagnetic heating control board, and the original temperature controller directly controls the working state of the electromagnetic heating control board through the soft start interface of the electromagnetic heating controller.
Principle analysis;
Schematic diagram of basic energy saving principle of electromagnetic induction heating circuit
As shown in the figure
