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Maximum operating temperature of electric heater alloy elements

Author: Source: Time: 2019-11-28 Category: Industry News
The maximum use temperature refers to the upper limit of humidity reached by the component itself during use. The operating temperature of the electric heater is always lower than the temperature of the element itself. The temperature difference between them varies with the structure of the electric heater and the way of heat transfer. In the case of the open type directly performing heat radiation, the temperature of the heating element itself is generally about 100 ° C higher than the working temperature of the heating element. When the electric heating element of the electric heater is buried in an insulator or wrapped around a thick insulating gasket, the difference between the temperature of the electric heating element itself and the operating temperature of the electric heater will be higher.

The maximum use temperature refers to the upper limit of humidity reached by the component itself during use. The operating temperature of the electric heater is always lower than the temperature of the element itself. The temperature difference between them varies with the structure of the electric heater and the way of heat transfer. In the case of the open type directly performing heat radiation, the temperature of the heating element itself is generally about 100 ° C higher than the working temperature of the heating element. When the electric heating element of the electric heater is buried in an insulator or wrapped around a thick insulating gasket, the difference between the temperature of the electric heating element itself and the operating temperature of the electric heater will be higher.

When the temperature of the electric heating element approaches the maximum temperature allowed, due to the weakening of the high-temperature creep strength, the electric heating element is prone to obvious deformation. In severe cases, it can cause short circuits between the rings, affect the service life, and even be burnt. Therefore, when selecting an electric heating element, pay attention to its maximum operating temperature.

Generally, for open-type electric heating elements, the highest operating temperature should be at least lower than the melting point of the alloy material by 200 to 300 ° C.

Considering that the same kind of electrothermal alloy material has a great impact on the service life under different specific conditions of use (such as the shape of the component, the size of the cross section, the surface load, the surrounding medium, the heat dissipation situation, the structure of the appliance, etc.)