Abstract: To systematically evaluate the influence of key parameters of the multi-ion module in the floor-standing air conditioner on the negative ion release characteristics and particulate matter purification efficiency, conduct multi-dimensional optimization research on the structure, performance, hardware design, and user interaction of the emitter quantity, probe spacing, grounding method, and dual air duct structure. The results show that when the module is configured with 6 groups of negative ion emitters and each group of emitters is connected in parallel with 3 carbon brushes, the particulate matter removal rate reaches the highest; when the carbon brush spacing is controlled within the range of 15 mm to 20 mm, the negative ion number concentration reaches a peak; grounding the plastic shell through a wire can effectively suppress charge accumulation and increase the negative ion escape rate. Under the synergistic effect of the dual air duct flow field, the theoretical coverage area of the negative ion concentration is approximately 45 m². After testing by a third-party authoritative institution, the PM_2.5 removal rate of the multi-ion module within 2 hours is greater than 99%. The research results provide a quantitative basis for the engineering design of high-efficiency air purification air conditioners with negative ion modules.

Key words: Negative ion generator, Probe spacing, Negative ion emitter, Negative ion concentration