[KongchangAI]
Unverified80% confidenceTradeoffTime unknown

负离子浓度越高越依赖高压放电,而高压放电正是臭氧的主要来源——追求超高浓度(如标称几千万)的机器往往臭氧风险更大,家用建议选浓度适中(100万-300万)且明确标注无臭氧的碳刷式产品

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