Qual é a razão pela qual a velocidade de aquecimento do anel de aquecimento elétrico de aço inoxidável diminuiu significativamente?

The heating speed of the stainless steel electric heating ring is significantly slowed down, which may be caused by various factors such as aging of the heating wire, abnormal power supply voltage, changes in heat dissipation conditions, etc. The following is a detailed introduction: Aging or damage of the heating wire leads to performance degradation due to long-term use: After long-term use, the heating wire will gradually age due to heat, and its O valor de resistência aumentará . de acordo com a lei de Joule \\ (q=i^{2} rt \\) (onde q é o calor, i é corrente, r é resistência e t), após a lenta), o calor da resistência (o calor gerado será diminuído na mesma corrente e na hora », resultante em um lento em um lento». O fio de aquecimento pode ser parcialmente fraturado devido à expansão e contração térmica frequente, vibração mecânica ou problemas de qualidade ., embora a fratura possa continuar conduzindo eletricidade por meio de arcos e outros meios, a resistência aumentará a resistência e a pó de baixo e o pó de baixo) e o caminho atual se tornará mais restrito, resultando em um picador (a temperatura) e a picante) e o picador é mais baixo (o pós -lento) If the actual input voltage of the electric heating coil is lower than its rated voltage, according to the power formula \\(P=\\frac{U^{2}}{R}\\) (where P is power, U is voltage, and R is resistance), the voltage reduction will cause the actual power of the electric heating coil to drop significantly, which will lead to a slower heating speed. For example, for an electric heating coil with a rated voltage of 220V, when the voltage drops to 200V, the power will drop by about 17%, and the heating speed will be significantly affected. Power line failure: Problems such as aging of wires, poor contact, and short circuit in the power line will increase the line resistance, thereby reducing the actual voltage at both ends of the electric heating coil, or the current transmission is unstable, affecting the heating power and slowing down the heating speed. Changes in heat dissipation conditions The ambient temperature is too low: If the ambient temperature of the electric heating coil is too low and the heat dissipation speed is too fast, the heat will be dissipated to the surrounding environment faster, resulting in less heat absorbed by the heated object and a slower heating speed. For example, in the cold winter, the heating speed of an electric heating coil used outdoors may be slower than when used indoors. Increased heat dissipation paths: If the installation position of the electric heating coil changes, or heat dissipation objects such as metal components and ventilation equipment are added around it, the heat dissipation paths will increase, the heat dissipation speed will be accelerated, and the heating speed will be affected. Changes in the characteristics of the heated object increase the heat capacity of the object: If the mass of the heated object increases, the material changes, or the internal structure changes, resulting in an increase in its heat capacity, then at the same heating power, the amount of heat required to raise the same temperature will increase, thereby slowing down the heating speed. For example, water was originally heated, but later it was changed to oil with a larger specific heat capacity. Under the same electric heating coil, the heating rate of oil will be slower than that of water. The thermal conductivity of the object deteriorates: When the thermal conductivity of the heated object decreases, the speed at which heat is transferred from the electric heating coil to the inside of the object will slow down, causing the surface temperature of the object to suba lentamente, e parece que a velocidade de aquecimento diminuiu a velocidade . pode ser porque há sujeira, revestimento ou oxidação na superfície do objeto, o que dificulta a condução de calor .} falha do sistema de controle de temperatura: Falha nos componentes como termostatos e termóficos no sistema de controle de temperatura pode causar A temperatura é definida pelo termostato ou a temperatura é medida incorretamente pelo termopar, o que faz com que a bobina de aquecimento elétrico não aqueça em energia normal, resultando em uma velocidade de aquecimento mais lenta .