{"appears_in":[{"position":10,"ranking_slug":"best-air-purifiers-2026","ranking_title":"2026 年空气净化器怎么选：颗粒物/甲醛 CADR、CCM 等级、净化能效三项定生死，10 款横向对比","score":7.6,"url":"https://buyranker.com/ranking/best-air-purifiers-2026"}],"brand":"小米 / 米家","buy_url":null,"canonical_url":"https://buyranker.com/product/xiaomi-mijia-air-purifier-4","category":{"name":"空气净化器","slug":"air-purifier"},"cons":["气态污染物处理能力弱于 4 Pro","睡眠档静音表现不如 4 Pro","不适合新房除醛"],"description":null,"id":"40f7d6ef839c69f0a6e258b8c63fa86f","image_url":null,"name":"米家空气净化器 4","official_url":null,"price":{"currency":"CNY","max":1099,"min":699},"pros":["千元以内的颗粒物 CADR 很有竞争力","接入米家生态，联动和语音控制方便","滤芯便宜，长期成本低"],"release_year":null,"slug":"xiaomi-mijia-air-purifier-4","specs":{"定位":"入门级卧室 / 儿童房机型","智能":"支持米家 APP 与小爱同学语音控制","颗粒物 CADR":"400 m³/h","建议适用面积":"28–32㎡（按 0.08 系数折算）"},"summary":"颗粒物 CADR 400 m³/h 的入门机型，千元以内覆盖次卧与儿童房绰绰有余。"}