FIRE HAZARD CONTROL METHOD AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2024 - IPC G08B17/10 

FIELD: fire-fighting equipment.

SUBSTANCE: group of inventions is intended for protection against fire of objects, including those where people can stay. Samples of the gas-air mixture are taken from the monitored object by means of a network. Network of air intake pipelines is made of four air intake pipelines and air flow level meters are installed in the inlet channels, made in the form of thermal anemometers and with possibility of temperature control. Inputs are combined with a common inlet chamber. An atmospheric pressure sensor is placed in the housing of the aspiration fire detector. A common inlet chamber is connected to the aspirator. A thermal anemometer is installed on the path of transporting mixed filtered flows from the smoke chamber to the gas-air mixture sampling module. All thermal anemometers and an atmospheric pressure sensor are electrically connected to the input data processing and control unit. By means of an aspirator, samples of the gas-air mixture are drawn through a coarse filter and partially a fine filter, through a smoke chamber and a laser measurement module. Operation of the gas-air mixture sampling module and the aspirator driver are controlled by means of an input data processing unit and control. Samples passed through the smoke chamber are sent back to the aspirator by means of sampling. A portion of these samples from the aspirator is directed to the exhaust. Sampling of part of the gas-air mixture into the laser measurement module is controlled in the smoke chamber by the sampling module of the gas-air mixture, providing an equal amount of the mixture into the measurement chamber at any moment in time. Intersection of optical axis of laser with at least four differently directed from focus of optical system optical axes of photosensitive sensors is provided in laser measurement module. One sensor direction coincides with the direction of the optical axis of the laser. Simultaneously, photosensitive sensors measure the number of aerosol particles that fall at the point of intersection of optical axes reflecting laser light at different angles on the photosensitive windows of the sensors. Fire hazard control device is an aspiration fire detector, including a housing, a front panel, a unit of input channels with input data meters, an aspirator, coarse and fine filters, a smoke chamber with a laser measurement module, a gas-air mixture sampling module, an exhaust branch pipe, an input data processing and control unit, electrically connected to the unit of inlet channels, to the gas-air mixture sampling module, to the laser measurement module, to the indication and control unit, to the interface unit, to the power supply unit. Unit of input channels has four inputs, in each of which there is one thermal anemometer. Unit of inlet channels is pneumatically connected to common inlet chamber. Inside the detector housing there is an atmospheric pressure sensor and an additional thermal anemometer on the path of transporting mixed filtered flows from the smoke chamber to the gas-air mixture sampling module. An aspirator driver is arranged between the aspirator and the input data processing and control unit.

EFFECT: higher reliability of fire hazard control.

3 cl, 2 dwg