{"appears_in":[{"position":9,"ranking_slug":"best-home-water-purifiers-2026","ranking_title":"2026 年家用净水器怎么选：水效等级、额定总净水量、换芯成本三项定生死，10 款横向对比","score":8.6,"url":"https://buyranker.com/ranking/best-home-water-purifiers-2026"}],"brand":"海尔（Haier）","buy_url":null,"canonical_url":"https://buyranker.com/product/haier-hpf37-pre-filter","category":{"name":"净水器","slug":"water-purifier"},"cons":["只拦颗粒物，不去余氯、水垢、重金属","需要专业安装，老房子可能没有预留位置","接口管径要提前确认（常见 4 分 / 6 分）"],"description":null,"id":"6a79bc5f650efa3a7a956daef1161cfd","image_url":null,"name":"海尔 HPF37 前置过滤器","official_url":null,"price":{"currency":"CNY","max":499,"min":329},"pros":["不用换滤芯，长期零耗材成本","保护热水器、洗衣机与下游净水器","显著延长 RO 滤芯寿命","价位友好，装修阶段装最省事"],"release_year":2024,"slug":"haier-hpf37-pre-filter","specs":{"类型":"入户前置过滤器","维护":"反冲洗，无需更换滤芯","安装位置":"入户总阀之后、分水之前","滤网材质":"不锈钢","过滤精度":"40 微米"},"summary":"40 微米不锈钢滤网 + 反冲洗，不用换芯，几百块保护全屋涉水电器。"}