空气消毒可以切断传染病的传播途径，对提高公共卫生安全有重要意义。大气压低温等离子体空气消毒技术凭借其高效环保，简单经济等优点受到各界广泛关注并取得快速发展。本文对大气压低温等离子体的两种发生结构电晕放电结构和介质阻挡放电结构进行不同参数下放电特性和杀菌特性研究，通过优化参数研制了一款介质阻挡放电结构的等离子体空气消毒设备。研究了不同结构和参数的低温等离子体发生装置的电学特性、图像特征和发射光谱特性。结果表明：针-板电晕放电存在明显的“极性效应”；线-板电晕放电中正极性电晕的发光均匀性明显好于负极性电晕；脉冲驱动下的介质阻挡放电在不同峰值电压、上升沿、脉冲频率、环境相对湿度、温度下，击穿电压、放电功率和发射光谱均存在差别，其发射光谱强度与放电功率接近正比关系；相同功率条件下，脉冲驱动与交流驱动的介质阻挡放电发射光谱形状无明显区别，脉冲驱动下的放电从图像上看更加均匀，其平均发光强度高于交流驱动下的放电29.6%。搭建了空气消毒实验平台，系统研究了电晕放电和介质阻挡结构的在不同参数下的杀菌特性。对于电晕放电杀菌装置，杀菌效率与高压放电极和低压收集极均有关系，提高二者电压有助于提升杀菌效率，环境相对湿度的变化对杀菌效果影响不大；对于介质阻挡放电结构，提高脉冲和交流驱动源峰值电压、频率，缩短脉冲驱动源上升沿等电源参数均可以提高杀菌效率。提高环境相对湿度时，杀菌效率随之先增大后减小，在50%-60%区间内细菌杀灭效果最佳；单独研究了臭氧在杀菌中的作用，结果表明7 ppm臭氧对细菌基本无杀灭作用；通过透射电镜观察等离子体杀灭后的细菌图像，发现等离子体对细菌结构具有显著破坏作用。研制了一款以高频交流电源为驱动形式，以介质阻挡放电结构为等离子体发生装置，以控制相对湿度为杀菌效果增益方式的等离子体空气消毒设备。解决了实际运用中的电磁兼容和环境适应性等问题，通过封闭空间循环杀菌验证了设备对金色葡萄球菌和大肠杆菌均具有高效灭活效果，证明该设备具有良好应用价值。

Air disinfection can cut off the transmission routes of infectious diseases, which is of great significance for improving public health safety. The atmospheric pressure low-temperature plasma air disinfection technology has attracted widespread attention and achieved rapid development due to its advantages of high efficiency, environmental protection, simplicity, and economy. This article studies the discharge and sterilization characteristics of two different generation structures of atmospheric pressure low-temperature plasma, corona discharge structure and dielectric barrier discharge structure, under different parameters. Finally, a plasma air disinfection device with dielectric barrier discharge structure is developed.The electrical, image, and emission spectral characteristics of low-temperature plasma generation devices with different structures and parameters were studied. The results showed that there was a significant polarity effect in needle plate corona discharge; The luminescence uniformity of positive polarity corona discharge is significantly better than that of negative polarity corona discharge in wire plate corona discharge; Under pulse driving, dielectric barrier discharge exhibits differences in breakdown voltage, discharge power, and emission spectrum at different peak voltages, rising edges, pulse frequencies, environmental relative humidity, and temperatures. The emission spectrum intensity is closely proportional to the discharge power; Under the same power conditions, there is no significant difference in the emission spectrum shape of dielectric barrier discharge between pulse driven and AC driven. The discharge under pulse driven is more uniform from the image, with an average luminous intensity higher than that under AC driven by 29.6%.An air disinfection experimental platform was built to study the sterilization characteristics of corona discharge and dielectric barrier structures under different parameters. For corona discharge sterilization devices, the sterilization efficiency is related to both the high-voltage discharge electrode and the low-voltage collection electrode. Increasing the voltage of both electrodes helps to improve the sterilization efficiency, while changes in environmental relative humidity have little effect on the sterilization effect; For dielectric barrier discharge structures, increasing the peak voltage and frequency of pulse and AC driving sources, shortening the rising edge of pulse driving sources, and other power parameters can all improve sterilization efficiency. When the relative humidity of the environment is increased, the sterilization efficiency first increases and then decreases, with the best bacterial killing effect in the range of 50% -60%; The role of ozone in sterilization was studied separately, and the results showed that 7 ppm ozone had almost no bactericidal effect on bacteria; By observing the bacterial images after plasma killing through transmission electron microscopy, it was found that the bacterial structure was disrupted.A plasma air disinfection device has been developed, driven by a high-frequency AC power supply, with a dielectric barrier discharge structure as the plasma generation device, and controlling relative humidity as the sterilization effect gain method. Solved the problems of electromagnetic compatibility and environmental adaptability in practical application, and verified the efficient inactivation effect of the equipment on both Staphylococcus aureus and Escherichia coli through 2-hour enclosed space circulation sterilization.