Fire sensor and method for detecting fire
A fire sensor and sensor technology, applied in fire alarms, fire alarms that rely on radiation, and fire alarms that rely on smoke/gas effects, can solve the problem of limited number, trapped permanent fans, and noisy fans. Frequent maintenance requirements and other issues to achieve the effect of extending service life, extending maintenance cycle and reducing quantity
Active Publication Date: 2011-05-11
HONEYWELL INT INC
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But this setup is only suitable for a limited number of applications where enough power needs to be available for a small number of sensor devices
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[0050] As previously stated, the technology disclosed herein is particularly advantageously implemented in the form of a low-profile fire sensor, so the following description will focus on this example. It should be appreciated, however, that the apparatus and methods described below can equally well be implemented in conventionally mounted fire sensors.
[0051] figure 1 A first embodiment of the fire sensor is shown with the main functional components. The sensor 1 is arranged in or near a monitored area M, eg a room (or a part of a room) in a building. The fire sensor 1 is typically mounted to a surface of the monitored area M, preferably the ceiling or some or other horizontal surface near the upstream of the monitored area due to Fire products usually rise. The fire sensor 1 comprises an inner chamber 2 which is arranged to communicate with the air in said monitored area via at least an inlet 2a and preferably also an outlet 2b. In alternative embodiments, the inlet a...
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A fire sensor is disclosed for detecting fire in a monitored region. The fire sensor comprises: a chamber in fluid communication with the monitored region via at least one inlet; an internal detector assembly adapted to detect fire products within the chamber and to output a corresponding internal detection signal; an external detector assembly adapted to detect fire products outside the chamber in the monitored region and to output a corresponding external detection signal; a fluid transport device, adapted to draw a sample of the atmosphere from the monitored region into the chamber through the at least one inlet; and a controller adapted to activate the fluid transport device upon receipt of a trigger signal based on the external detection signal to thereby draw a sample of the atmosphere from the monitored region into the chamber for analysis by the internal detector assembly. Also provided is a corresponding fire detection system and method of detecting fire.
Description
technical field [0001] The invention relates to a fire sensor, a fire detection system and a method of detecting a fire. The disclosed technique is particularly applicable to low-profile fire sensors, but may also be applied to other types of sensor units. Background technique [0002] Low profile fire detectors are being used more and more as architects require good aesthetics in the monitored area and an unobstructed line to the ceiling area. Typically, the low profile detectors are recessed into the ceiling or other surface so that the completed unit is mounted substantially flush with the remainder of the ceiling. Thus, possible future applications of such detectors include uses where fire detection is required in prison type premises without the ability to add knotting points. [0003] Such low profile detectors typically utilize open optical scattering chambers for detecting fires. This essentially consists of radiation emitters and corresponding detectors spaced ap...
Claims
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Login to View More IPC IPC(8): G08B17/00G08B17/107G08B17/11G08B17/117G08B17/12
CPCG08B17/10G08B17/113G08B25/002G08B29/183G08B29/24
Inventor M·巴森
Owner HONEYWELL INT INC