| 摘要 |
An apparatus and method for controlling emergency ventilation of a liverstock building comprising an environment sensor (12), air operated trip mechanism (14), and a source(10) of compressed air. The trip mechanism (14) is connected to open or close doors, windows or other sources of ventilation in the building in response to the presence or absence of the compressed air. Upon sensing a deviation from a prescribed ventilation norm, the environmental sensor (12) controls application of the compressed air to the trip mechanism (14) via solenoid valves (24, 30) to reverse the state of the building ventilation, i.e., to close the ventilation source if open, or to open the ventilation source if closed.
|
