What Is an Automatic Door Closer?
Automatic door closers are devices that automatically close fire doors or shutters to prevent the spread of fire, acting as crucial fire prevention equipment. They are designed with safety mechanisms to ensure reliable operation during emergencies, such as releasing a brake to let the shutter close by gravity when a fire is detected.
Such devices are mandated under building regulations and subject to strict safety standards to prevent accidents involving fireproof shutters, emphasizing the importance of incorporating hazard prevention mechanisms.
Uses of Automatic Door Closers
Automatic door closers are primarily used with fire doors and shutters, activating in response to fire alarms or smoke detectors. They serve essential functions in creating compartments to contain fires within specific areas or floors and facilitating safe evacuation through stairwells.
Principle of Automatic Door Closers
These devices usually keep fire doors open under normal conditions through electromagnetic holding mechanisms. Upon fire detection, the power is cut, deactivating the magnet and allowing the door to close automatically to contain the fire and smoke.
Types of Automatic Door Closers
Automatic door closers vary in their mounting and operational methods, including direct-mounted, separately mounted, and built-in types for general shutters, as well as specific models designed for hazard prevention with internal gears and motors.
How to Choose Automatic Door Closers
Selection criteria include the installation method (floor or wall-mounted), which depends on the door’s opening direction and the presence of supporting structures. Special considerations such as space-saving designs, high holding power for larger doors, and the use of extension rods to address spatial constraints or operational interference are also important.
Structure of Automatic Door Closers
Automatic door closers function by releasing the braking mechanism, allowing the door or shutter to close under its weight. They can be activated through smoke detection or manually, ensuring flexibility in emergency response.