Range hood capable of detecting oil fume concentration

Abstract

The invention discloses a range hood capable of detecting the oil fume concentration. The range hood comprises a shell. A fan and a main control unit capable of controlling the rotating speed of the fan are arranged in the shell. The fan is mounted in a fan shell, and the fan shell is arranged in the shell and provided with an air inlet and an air outlet. The main control unit is further connected with a photoelectric oil fume sensor capable of detecting the oil fume concentration. The photoelectric oil fume sensor comprises a detecting light emitting device and a detecting light receiving device and is characterized in that the detecting light emitting device and the detecting light receiving device have an included angle after being mounted, and an intersection point or an intersection area of the straight line where the emitting direction of the detecting light emitting device is located and the straight line where the receiving direction of the detecting light receiving device is located is located 1-5 cm below the air inlet of the fan shell; and the detecting light emitting device and the detecting light receiving device further comprise protection structures, or, the detecting light emitting device or the detecting light receiving device further comprises a protection structure. The range hood is high in detection sensitivity, and the oil stain resistant effect of the oil fume sensor is good.

Description

technical field [0001] The invention relates to a range hood, in particular to a range hood capable of detecting the concentration of lampblack. Background technique [0002] The intelligent control of existing range hoods mostly depends on the accurate detection of relevant environmental indicators such as gas concentration, oil fume concentration, temperature, odor concentration, and stove switch by sensors. Among them, the automatic opening and closing of the range hood is mainly achieved by detecting the sudden change of these indicators from scratch, while the automatic control of the speed or gear of the range hood fan is mainly based on the value of the indicators. [0003] For example, Chinese Patent No. 20111003374.0 proposes a smoke detection system based on a camera, which can detect the amount of smoke, and then automatically control the range hood to work according to the smoke concentration. In this solution, a camera needs to be set up to collect images of th...

AI Technical Summary

Problems solved by technology

The disadvantage of the above protective structure is that an external clean air source is required, the preparation of clean air is very complicated, and an external power source is required to pass the clean air into the device

In addition, for the oil fume sensor to accurately monitor the change of the oil fume concentration, the rationality of the installation location is very important. The first condition is that the detection range of the sensor must be on the necessary path for the oil fume to run. It is often installed on the fume collecting hood. When the amount of fume is small, it is often not detected, so the detection sensitivity of the fume sensor is not high.

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