Compressed air foam systems

摘要

The present invention provides new compressed air foam systems for use as firefighting equipment. One compressed air foam system has a water inlet connected to a water flow path through the compressed air foam system. A water and foam chemical mixer is flow connected to the water inlet and has a foam chemical inlet and a water/foam chemical outlet. An air compressor is provided which has an air inlet, an air outlet, and an air flow controller at the air inlet. A foam mixer is flow connected to the water/foam chemical outlet of the water and foam chemical mixer and to the air outlet of the air compressor. The foam mixer has a foam outlet which provides firefighting foam to a fireman's hose for application to a fire. A control system has a sensor in sensing relationship with the water flow path through the compressed air foam system for sensing water flow. The control system is operatively connected to the air flow controller of the air inlet to the air compressor to the amount of air provided to the water/foam chemical mixture by restricting inflowing air into the air compressor.