6 results about "Smog chamber" patented technology

A combined-type smoke generator includes a shell. A battery is installed on one side of bottom inside shell, an electrode needle is installed on one side of top inside shell, an air pump is installed on the other side of bottom inside shell, a connecting assembly is installed on the other side of top inside shell, a smoke compartment is installed on the left side of top of shell, an air inlet is installed on the right side of the smoke compartment, a control assembly is installed on the front side of the shell, the top of the electrode needle is connected to the bottom of the smoke compartment, the battery is connected electrically to the electrode needle, the air pump is connected through the connecting assembly to the air inlet of the smoke compartment, and the control assembly is connected electrically to the battery and the air pump respectively.

A multi-sensor fire alarm device has a core (9) with a base (20) for engaging a ceiling and having a longitudinal axis. A cover (2) surrounds some of the core, and has vents (4, 204, 5, 205) to allow flow of ambient air radially inwardly into a first level (AF1) closest to the base and to flow (AF2) into a second level above the first level. An optical smoke chamber (160) is mounted centrally in the first level, and there are only two thermal probes on diametrically opposed sides near the vents in the second level. Air entering the second level is either directly incident on a thermal probe (50) or is deflected circumferentially towards it by a deflector (55) in the second level, and so there is only need for two probes. Guides provide air flow paths (150, 151, 152) from the first level to the smoke chamber Vents (204) for the first level have an insect-blocking mesh(204(a)) and vents (205) for the second level do not have such a mesh so that there is an open space for inflowing air without obstructions to affect temperature of the air.

Smoke detector for enclosed spaces with a housing (10) in which a separate smoke chamber (4) with a smoke inlet opening (5) is partitioned, in which measuring electronics are arranged which generate an evaluable measurement signal when smoke particles are detected, with at least one IR transmitting diode (6, 8) arranged in the housing (10), the transmitting signals of which are guided by two spaced-apart, parallel, transparent light-guiding media (2, 3) to at least one IR receiving diode (7, 9), which is provided for receiving the transmitting signals from the at least one IR transmitting diode (6, 8), wherein the light-guiding media (2, 3) surround the smoke inlet opening (5), wherein a change in the received transmitting signals at the at least one IR receiving diode (7, 9) indicates at least partial covering of the smoke inlet opening (5) and / or particles in the smoke inlet opening (5) and generates a warning signal, wherein the smoke detector is designed such that covers and contaminants on the outside of one of the light-guiding media (2,3) alter the light-guiding properties and also a signal arriving at one end of the light-guiding medium (2,3) by coupling out part of the signal at a point on the cover and contaminant.

This utility model relates to the field of fire protection technology and discloses an easily adjustable smoke detector detection device, including a mounting hopper. A rectangular frame is fixedly connected to the lower end of the mounting hopper. The rectangular frame is divided into a smoke chamber and a filter chamber by a partition. A smoke generator is fixedly connected inside the smoke chamber. Two symmetrically mounted bases are rotatably connected inside the mounting hopper. A cleaning mechanism is detachably connected to each base. A drive mechanism for rotating the bases is fixedly connected to the outer wall of the mounting hopper. Two threaded holes are formed on the mounting hopper, and threaded caps are threaded onto each hole. A filter mechanism is detachably connected inside the filter chamber. A sealing component for sealing the filter chamber outlet is installed on the rectangular frame. A telescopic component is installed below the mounting hopper. This utility model allows for flexible adjustment depending on whether the smoke detector is installed on the ceiling or the wall, and filters the cleaned dust to prevent it from falling back onto the smoke detector.

The present disclosure provides a sample injection method suitable for a smog chamber reactor, comprising: in the case that the sample to be injected is a gas, calculating a target pressure of the gas sample to be injected in a cylinder; injecting the first gas sample into the cylinder in a vacuum state, and stopping injecting the first gas sample into the cylinder when the pressure in the cylinder reaches the target pressure; injecting the first gas sample in the cylinder into the smog chamber reactor, so that the first gas sample in the smog chamber reactor reaches a first predetermined reaction reference concentration value. In the case that the sample to be injected is a liquid, calculating a target volume of the liquid sample to be injected in a liquid jacket; injecting the target volume of the liquid sample into the liquid jacket through a liquid inlet, so that the target volume of the liquid sample generates a second gas sample after vaporization in the liquid jacket; injecting the second gas sample into the smog chamber reactor, so that the second gas sample in the smog chamber reactor reaches a second predetermined reaction reference concentration value.

A multi-sensor fire alarm device has a core (9) with a base (20) for engaging a ceiling and having a longitudinal axis. A cover (2) surrounds some of the core, and has vents (4, 204, 5, 205) to allow flow of ambient air radially inwardly into a first level (AF1) closest to the base and to flow (AF2) into a second level above the first level. An optical smoke chamber (160) is mounted centrally in the first level, and there are only two thermal probes on diametrically opposed sides near the vents in the second level. Air entering the second level is either directly incident on a thermal probe (50) or is deflected circumferentially towards it by a deflector (55) in the second level, and so there is only need for two probes. Guides provide air flow paths (150, 151, 152) from the first level to the smoke chamber Vents (204) for the first level have an insect-blocking mesh(204(a)) and vents (205) for the second level do not have such a mesh so that there is an open space for inflowing air without obstructions to affect temperature of the air.