【摘要】 通过大量实验,测定了蚕蛹、茧层的红外吸收图谱,选择相应波长范围的红外涂料和红外灯泡,在不同温度和不同堆放厚度条件下测定了蚕茧的干燥曲线,并与不采用红外线的干燥曲线进行了比较,结果表明红外线未能够提高蚕茧的干燥速率。实验还测定了0.25～25μm范围内单片茧层的红外线透过曲线,结果表明,在所测范围内,红外线的透过率为零,这说明红外线无法穿透茧层。茧层的水分含量很低(约10%),蚕蛹的水分含量很高(约80%),蚕茧干燥的主要目的是除掉蚕蛹中的水分,但茧层包含着蚕蛹,红外线无法穿透茧层对蛹体进行快速干燥。而且,茧层的红外吸收率很低,也不能通过茧层快速吸收红外线热能,然后传给蚕蛹来提高干燥速率,这便是红外线不能提高蚕茧干燥速率的原因。这一结论对国内外蚕业界探讨蚕茧干燥的理论与实践有重要的参考意义。更多还原

【Abstract】 The infrared absorbance atlases of cocoon and silkworm chrysalis were determined. The infrared coating with suitable wavelength and infrared bulb were selected for determining cocoon drying rates in different temperature and different stack layers of cocoon. The experimental results indicated that infrared heating cant increase the drying rate of silkworm cocoon. The infrared rays transmittances are zero for one piece of silkworm cocoon in the wavelength of 0.25～25μm. This indicated that infrared rays cant transmit through the cocoon layer. Because the water is less in cocoon (about 10%) and more in silkworm chrysalis (about 80%), so that the main purpose of cocoon drying is gasifying the water in silkworm chrysalis. But cocoon surrounds silkworm chrysalis, infrared ray cant transmit through the cocoon layer to dry the silkworm chrysalis quickly. Moreover, the infrared absorbance of cocoon is lower, so it is also impossible to increase the drying rate of silkworm cocoon largely to make cocoon absorb the infrared heat then transfer to the chrysalis. This original idea will be significant for silkworm cocoon drying theory and the practice in the world.更多还原