A system comprising an air purifier and a container

摘要

A system comprising an air purifier and a container 10. The air purifier is configured to output purified air into the container, wherein the air purifier comprises an adiabatic compression stage 50 for purifying the air. The adiabatic compression may be provided by a diesel internal combustion engine. A contaminant removal stage 70 may be provided after the adiabatic compression stage. The system may be able to switch between outputting the air into the container and into the external environment. Switching may be controlled by a detector which detects an external chemical or biological agent. The container may be a vehicle cabin, a tent, or a container housing sensitive components.