Smoke sensor fire alarm in the hotel system – sensors, automatic alarm system –
Submitted: Chinese Sensor Hotels are for domestic and international passenger accommodation, dining and holding meetings, functions. Hotels generally have a modern multi-functional, comprehensive features, catering, accommodation, entertainment, shopping as a whole, it is easy fires. Automatic fire alarm system for early detection of fires and fires in the early fighting, reduce the fire to maximize casualties, economic losses and adverse social effects play an important role.
1, simplifying the overall structure of the system design
Automatic fire alarm system consists of trigger devices, fire alarm devices, and linkage control system, etc.. System works as shown in Figure 1:
2, trigger devices In automatic fire alarm system, automatic or manual fire alarm signal devices generate, including manual alarm button and fire detectors. Manual alarm button is manually generated fire alarm signal devices, fire detectors are able to fire parameters (smoke, temperature, light, flame radiation, gas concentration, etc.) response, and automatically generate a fire alarm signal devices. The hotel-style buildings, in order to accurately forecast fire position, minimizing the detector's false positive rate, use smoke detectors, thermal detectors to form a regional fire detector network. Room bedroom, study, dining, reception room with a buzzer base using detectors, room any area detector fire alarm signal to the control room at the same time trigger buzzer beeps to alert the sleeping or working in the state of the guests rapid evacuation.
1) smoke detectors Smoke fire detector is to use a small smoke Sensor Response suspended in the atmosphere around the vicinity of the burning and (or) the pyrolysis of smoke aerosols (solid or liquid particle) a fire detector. Are generally ion-type and photoelectric smoke detector. The system adopts photoelectric type smoke detectors. Photoelectric type smoke detectors detect smoke from a room, which has a light source and a photosensitive element. Light exposure to the light sensitive components generally can not last, but when there is smoke entered, the light scattering produced in the smoke, so the light shines some light-sensitive element, the smoke more dense, scattering light to the photosensitive element on the more, Photographic element then optical signals are converted into signals output fire control.
2) thermal detectors In the early stages of fire, use the thermal devices to detect the occurrence of fire when an effective means. Thermal fire detector can be divided according to its mechanism set temperature fire detector, fire detector and the differential temperature difference of three fixed temperature fire detector. The system used air temperature difference between pipe type fire detectors. It consists of the air tube and diaphragm and the circuit components, when the ambient temperature changes slowly, thermal expansion of the air inside the air tube, after the leakage from the diaphragm hole escape, it will not promote the corrugated sheets, electrical contacts will not close; when temperature rise quickly, the air tube thermal expansion of the air quickly, too late leakage from the diaphragm of the escape hole, the pressure to increase membrane box, corrugated film to promote the displacement, so that contact closure, resulting in a fire alarm signal.
3, fire alarm devices
In automatic fire alarm system for receiving, display and transmit fire alarm signals, and can send control signals and has Other Accessibility control instructions being referred to the fire alarm device. In this system, fire alarm sound and light, this is an installation in the field of sound and light alarm devices, when the fire scene and confirmed, the installation of sound and light the fire at the scene by the fire alarm control center of fire alarm control start send a strong sound and light alarm signals in order to achieve the purpose of reminding the scene of attention. Taking into account the reliability of detector alarm system with early warning and fire two alarm mode. When the same region or two single-loop detector alarm, the system issued an alarm, which requires further confirmation of staff; when the double-circuit alarm or manual alarm devices, the system that the fire occurred, issued a fire alarm, and by fire Control system for fire extinguishing system startup.
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