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将直径为60 mm、单只功率为3 k W的碳化硅电热元件固定在电性能测试平台,测试了电热元件电阻与温度的变化关系、电热元件温度与时间的变化关系及冷段和发热部隔断时电热元件温度与时间的变化关系。结果表明:加热区温度整体上比较均匀,基本上呈现上端略高于下端的温度梯度,采用简单的隔热措施时,受到热阻作用,在隔热处温度升高十分显著,对冷端温度下降有限,需要进一步优化设计其结构提高使用时的节能和安全。
The diameter of 60 mm, a single power of 3 k W of silicon carbide heating element is fixed on the electrical performance test platform to test the relationship between the resistance and temperature of the heating element, the relationship between temperature and time of the heating element and the cooling section and the heating section Interruption of electric element temperature and time changes. The results show that the temperature in the heating zone is relatively uniform as a whole, and basically shows a temperature gradient slightly higher than the lower end. When using simple thermal insulation measures, the temperature is affected by the thermal resistance and the temperature at the insulation is very significant. Decline is limited, the need to further optimize the design of its structure to improve energy efficiency and safety.