医疗卫生装备2026，Vol.47Issue(6)：87-92,6.DOI:10.19745/j.1003-8868.2026096
热敷理疗袋电磁兼容传导发射测试与优化研究
Research on conducted emission testing and optimization of electromagnetic compatibility for hot compress physiotherapy bags
摘要
Abstract
Objective To propose an optimization scheme for solving the problems of excessive current in the live and neu-tral wires during conducted emission testing of hot compress physiotherapy bags.Methods A QNHY-HY01 hot compress physiotherapy bag served as the test subject,and conducted emission testing was carried out with a German R&S ESR7 receiver and an ENV216 artificial power network to identify frequency bands exceeding limits and pinpoint the source of interference.The hybrid differential-common mode interference was suppressed through designing a differential-common mode composite filter by adding two stages of LC filters at the power supply input end and optimizing the printed circuit board layout by reducing the spacing between the switching power supply and the heating module to 8 mm,shielding clock signals and segmenting the ground plane.The results of conducted emission testing and improvements in the spectrum before and after optimization were compared.Results The conducted emission testing results showed that,following optimization,the conducted emission values of live and neutral wires decreased by an average of 12 dBμV within the 0.15-30 MHz frequency band,with the maximum margin reaching 41.2 dBμV;spectrum analysis results indicated that after optimization the interference level in the frequency band above 0.5 MHz declined from approximately 10 dBμV to below 5 dBμV,repre-senting an attenuation of more than 5 dB μV.Conclusion The design of the differential-common mode composite filter and the optimization of the printed circuit board layout contribute to suppressing effectively the conducted emission interference of hot compress physiotherapy bags and ensuring the device's electrical clearance and creepage distance complying with GB 9706.1-2020 Medical electrical equipment-Part 1:General requirements for basic safety and essential performance,providing references for the electromagnetic compatibility design and optimization of similar products.[Chinese Medical Equipment Journal,2026,47(6):87-92]关键词
热敷理疗袋/电磁兼容性/传导发射/医用电气设备Key words
hot compress physiotherapy bag/electromagnetic compatibility/conducted emission/medical electrical equipment分类
医药卫生引用本文复制引用
任戬,王宸,孙晓宁,张敏娟,陈岳蓉,赵志杰,龙存林,雷迪..热敷理疗袋电磁兼容传导发射测试与优化研究[J].医疗卫生装备,2026,47(6):87-92,6.基金项目
青海省科协中青年科技人才托举工程(2023QHSKXRCTJ49,2024QHSKXRCTJ09) （2023QHSKXRCTJ49,2024QHSKXRCTJ09）
