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随着工农业的发展,使用远红外线进行加热,已经广泛深入地开展起来了。使用远红外线进行加热比传统的加热方式所呈现出的很多优点已为实践所证实,并为许多单位所采用。产生这些优点的原因,归纳起来就是:(1)把原加热设备的电热丝用一些旁热材料(例如碳化硅、氧化镁、锆英石等等)包起来,以期降低直接辐射表面的温度,从而使所辐射的红外线能量比起电热丝来,较多地集中在波长较长的红外区域。这就是所谓“远红外加热”名称的由来。(2)在这种加热元件的旁热材料表面上,再涂上一层辐射率较高的涂料,以期增加外加能源转换成红外线的转换效率。也就是说,在相同条件下,能够得到较多的红外线。(3)被加热工件在远红外波段范围内往往又有较好的吸收特性。根据(1)、(2)两点所述可知,辐射元件所辐射的红外线能够较多地集中在被加热工件吸收特性较好的波段范
With the development of industry and agriculture, the use of far-infrared heating has been carried out extensively and thoroughly. The benefits of using far-infrared heating over conventional heating methods have been proven in practice and have been adopted by many units. The reasons for these advantages are summed up as follows: (1) The heating wire of the original heating device is wrapped with some hot materials (such as silicon carbide, magnesia, zircon, etc.) in order to reduce the direct radiation surface temperature, As a result, the radiated infrared energy is more concentrated in the longer wavelength infrared region than the heating wire. This is the origin of the so-called “far-infrared heating” name. (2) Apply a coating of higher emissivity to the surface of the heating element adjacent to the heating material in order to increase the conversion efficiency of the additional energy source into infrared light. That is, under the same conditions, more infrared light can be obtained. (3) the workpiece is heated in the far-infrared range and often have good absorption characteristics. According to (1) and (2), it can be known that the infrared radiation radiated by the radiating element can be concentrated in the wave band with better absorption characteristics of the heated workpiece