Flue gas detection device

Abstract

The invention discloses a flue gas detection device. The device is used for being installed outside a flue and communicated with the interior of the flue through a hole formed in the flue. The device comprises a shell, wherein the shell is internally provided with a sampled flue gas suction port, a sampled flue gas channel, a sampled flue gas outlet, a sampling fan used for sucking flue gas in the flue into the sampled flue gas suction port and guiding the flue gas out through the sampled flue gas outlet after the flue gas passes through the sample flue gas channel, and a photoelectric sensor module used for detecting the concentration of flue gas in the sampled flue gas channel. The device is installed outside the flue and not affected by vibration of a wind wheel motor in the flue easily, and the device is convenient to install and replace; besides, compared with the existing mode that a photoelectric sensor is directly arranged in a flue, the device has the advantages that the photoelectric sensor module in the shell is not exposed in the flue, so that detection accuracy of the photoelectric sensor module is guaranteed and the service life of the photoelectric sensor module is prolonged.

Description

[0001] [technical field] [0002] The invention relates to a smoke detection device. [0003] [Background technique] [0004] The existing household range hoods on the market all need to manually adjust the wind power of the range hoods in the kitchen according to the specific content of cooking during use, which is not very convenient for users. [0005] Existing range hoods with oil fume detection function are usually directly equipped with exposed sensors to detect oil fume, which has the following technical difficulties: [0006] 1. All kinds of smoke and gas are mixed, and oil residues are easy to remain. After a period of use, the oil smoke will easily cover the entire sensor, resulting in a decrease in the accuracy of detection. In this way, users need to clean the surface of the sensor frequently, which is not conducive to practical use. [0007] 2. In practice, the oil fume passing through the sensor may come in bursts, which greatly increases the difficulty of accur...

AI Technical Summary

Problems solved by technology

[0006] 1. All kinds of smoke and gas are mixed, and oil residues are easy to remain. After a period of use, the oil smoke will easily cover the entire sensor, resulting in a decrease in the accuracy of detection. In this way, users need to clean the surface of the sensor frequently, which is not conducive to actual use

[0007] 2. In practice, the oil fume passing through the sensor may be a burst, which greatly increases the difficulty of accurate detection

[0008] 3. When the photoelectric sensor is used for oil fume detection, due to the irregular vibration of the wind turbine motor in the hood, the inside of the cavity is directly used as the emission unit and the reflection unit is easily affected. The emission unit and the reflection unit are likely to vibrate inconsistently, which may easily cause the detection of the reflection unit The results are very different

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