Air Purifier / 空气净化器
Air purifier appears in 97.花粉症与人类：从尼安德特人（啊啾！）到空气净化器… as a household technology linked to hay-fever avoidance. The episode says early attempts to make indoor air tolerable for pollen-allergy sufferers helped connect air purification, air conditioning, and the modern private home.
The source’s point is not that every cooling or filtering technology has a single origin. It uses the air purifier to show how Hay Fever Environmental History creates markets and infrastructure: when [[AllergySourceControl|source control]] is hard and outdoor pollen cannot simply be eliminated, people build filtered indoor space as a health adaptation.
Connections
- 97.花粉症与人类：从尼安德特人（啊啾！）到空气净化器… - source episode.
- Hay Fever Environmental History - disease context.
- Allergy Source Control - why indoor control becomes attractive when outdoor control is difficult.
- Cooling As Public Health - adjacent frame for air conditioning as health infrastructure rather than only comfort.
- Urban Ecology - outdoor pollen, city lots, and indoor refuge interact.