Negative ion generating device and control method thereof

According to the negative ion generating device and the control method thereof, the vertical distance between the first circuit board and the tip end of the spray point is reasonably set, the pushing force of the first circuit board to negative ions is improved, and the negative ions are diffused farther; the shielding plate can play a role in electric field shielding, and the working efficiency of the negative ion generating device is improved. In the control method of the negative ion generation device, after the negative ion generation device is electrified, grounding circulation repetition is performed on the shielding plate, so that the shielding effect on an electric field in the negative ion generation device can be ensured, the working efficiency of the negative ion generation device is improved, and on the other hand, the discharge performance of the discharge needle cannot be influenced. 本申请提供一种负离子发生装置及其控制方法，本申请的负离子发生装置，合理设置第一线路板与放电针尖端之间的垂直间距，提高第一线路板对负离子的推送力，使得负离子扩散得更远；设置屏蔽板能够起到电场屏蔽作用，增大负离子发生装置工作效率。