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Range hood capable of detecting oil fume concentration

A technology of oil fume concentration and range hood, which is applied in the direction of oil fume removal, measuring devices, household stoves/stoves, etc. It can solve the problems of low detection sensitivity of oil fume sensor and complicated preparation of clean air, so as to reduce the possibility of pollution, The effect of ensuring the detection rate and signal stability

Active Publication Date: 2017-12-15
NINGBO FOTILE KITCHEN WARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Range hood capable of detecting oil fume concentration
  • Range hood capable of detecting oil fume concentration
  • Range hood capable of detecting oil fume concentration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 1 The shown range hood that can detect the concentration of oil fume includes a housing 1, which is provided with a fan 2 and a main control unit (not shown in the figure) that can control the speed of the fan. The fan 2 is installed in the fan casing 3, and the fan casing 3. It is arranged in the housing 1. The fan housing 3 has an air inlet 31 and an air outlet (not shown in the figure). The main control unit is also connected with a photoelectric oil fume sensor capable of detecting the concentration of oil fume. The photoelectric oil fume sensor includes The detection light emitting device 4, the detection light receiving device 5 and the sensor circuit board (not shown) connected to the detection light receiving device, the detection light emitting device 4 has a light emitting part 41 capable of emitting detection light, and the detection light receiving device 5 There is a light receiving part 51 that can receive the detection light sent by the lig...

Embodiment 2

[0044] The difference from the first embodiment is that only the detection light emitting device 4 is provided with a protective structure for protecting the light emitting part 41, the protective structure is the same as that described in the first embodiment, see image 3 shown.

Embodiment 3

[0046] The difference from the first embodiment is that only the detection light receiving device 5 is provided with a protective structure for protecting the light receiving part 51, the protective structure is the same as that described in the first embodiment, see Figure 4 shown.

[0047] In addition, in addition to the structure described in Embodiment 1, the protective structure can also have other forms: for example, there can be multiple blocking plates 66 in the tubular cavity, and they can be arranged at intervals, such as three, and two adjacent blocking plates The diameters of the through holes on the 66 can be the same or different, Figure 5 shown. The design of this multiple variable-diameter labyrinth makes the inner diameter of the tubular cavity expand and shrink multiple times. When expanding, the oil fume obtains a radial diffusion driving force, and most of the oil fume entering the pipe is diluted at this section and adheres to the inner wall of the pipe...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24C15/20G01N15/06
CPCF24C15/2021G01N15/06G01N15/075
Inventor 戴九松徐钦龙刘戈茅忠群诸永定
Owner NINGBO FOTILE KITCHEN WARE CO LTD
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