Fire damper for ventilating fan

A fire damper for a ventilating fan includes a shutter and a frame provided with a flange. An opening is provided on the frame. The frame is further provided with a movable component for covering or uncovering the opening.

Bibliographische Detailangaben

Hauptverfasser:	Long Min, Hou Guancheng
Format:	Patent
Sprache:	eng
Schlagworte:	AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING BLASTING FIRE-FIGHTING HEATING HUMAN NECESSITIES LIFE-SAVING LIGHTING MECHANICAL ENGINEERING RANGES VENTILATING WEAPONS
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