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高频加热是现代工业生产中广泛采用的一项先进技术。它利用频率在数百千赫到数千兆赫范围内的高频电磁能量来加热金属及介质。由于高频加热用的辐射器、感应圈或电极在空间辐射电磁波或散发电磁场,因此,设备外就不可避免地出现一些散杂漏场。另外,由于设备本身屏蔽不良或为了散热将机壳敞开,则在机器操作位置上,也将出现较大的电磁场与辐射,其强度往往超过卫生标准数倍以上,从而有损作业人员的健康。早期会出现头昏、头痛、乏力、记忆力减退、心悸、胸闷、消瘦、脱发等神经衰弱症状。部分女工经期紊乱。重者手足出汗,手指震颤,指甲扁平、心律不齐、血压不稳。大剂量照射还可引起眼睛晶状体混浊,造成白内障。
High-frequency heating is a widely used advanced technology in modern industrial production. It uses high-frequency electromagnetic energy in the frequency range of hundreds of kilohertz to several gigahertz to heat metals and media. Since high-frequency heating radiators, induction coils or electrodes radiate electromagnetic waves in space or emit electromagnetic fields, some scattered leakage fields inevitably occur outside the equipment. In addition, due to the poor shielding of the device itself or the opening of the cabinet for heat dissipation, large electromagnetic fields and radiation will also appear in the operating position of the machine, the strength of which often exceeds the hygiene standards by several times, thus impairing the health of workers. Early dizziness, headache, fatigue, memory loss, palpitations, chest tightness, weight loss, hair loss and other symptoms of neurasthenia. Some women’s menstrual disorders. Heavy hand sweat, finger tremor, nails flat, arrhythmia, blood pressure instability. Large doses of radiation can also cause eye lens opacity, causing cataracts.