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Impeller detection method in building centralized smoke exhaust system

A smoke exhaust system and detection method technology, applied in the direction of heating method, oil fume removal, non-variable pump, etc., can solve the problems of aggravated oil pollution accumulation, load imbalance, impeller eccentricity increase, etc., so as to alleviate oil pollution accumulation and make accurate judgment Effect

Active Publication Date: 2021-03-05
NINGBO FOTILE KITCHEN WARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, the air outlet of the user-side indoor range hood is connected to the public flue through an adjustable angle valve. The outdoor main fan system is equipped with a centralized filtration system, which has begun to be used in some well-decorated buildings. The outdoor main fan system is aimed at different indoor The operating rate of the range hood is controlled by frequency conversion, or the flow distribution is realized by adjusting the angle of the adjustable angle valve on different floors; in the centralized smoke exhaust system of the building, the outdoor main fan system and the indoor range hood are often equipped with impellers. Therefore, the separation degree of grease can be effectively improved, but after a certain period of use, since indoor range hoods and outdoor main fan systems are mostly installed vertically with radial fans, and the impellers are generally installed vertically, the accumulation of oil stains on the lower part of the impellers will be biased. And when the range hood is turned off, the separated grease will stay in the lower part of the impeller, which will intensify the accumulation of oil, which will lead to the eccentricity of the impeller and the unbalanced load.
At present, only regular cleaning and maintenance of the impeller can be used in the market to alleviate the eccentricity and load imbalance of the impeller.

Method used

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  • Impeller detection method in building centralized smoke exhaust system
  • Impeller detection method in building centralized smoke exhaust system
  • Impeller detection method in building centralized smoke exhaust system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 The shown building centralized smoke exhaust system includes M indoor range hoods 11, 12... 1M arranged inside the household kitchens on different floors, where M is a natural number; the public flue 2 arranged inside the building is arranged in the The outdoor main fan system 3 on the top floor, the air outlets of multiple indoor range hoods are connected to the public flue through the angle-adjustable electric check valve 4, and the air outlets of the public flue are connected to the entrance of the outdoor fan system; The indoor fan and indoor impeller are installed in the range hood, and the indoor impeller is driven by the indoor fan; each indoor range hood presets the state parameter r of oil pollution accumulation, and the initial value of r is 0, and the detection state parameter S of the indoor impeller, S is initially The value is 0; the indoor range hood detects the indoor impeller through the following steps, see figure 2 Shown:

[0038] ...

Embodiment 2

[0053] The difference from Embodiment 1 is that when it is judged in step 11 that the indoor impeller is eccentric and the load is unbalanced, the indoor range hood enters a maintenance mode for pulsating maintenance of the indoor impeller. In the maintenance mode, the interior of the indoor range hood The preset maintenance cycle parameter T, the initial value of T is 0, the maintenance mode includes the following steps, see image 3 Shown:

[0054] Step 1. The indoor impeller rotates forward at the second preset gear position Ts for the second preset time t2, then stops for the third preset time t3, and enters step 2;

[0055] Step 2. The indoor impeller reverses for the fourth preset time t4 at the second preset gear position Ts, and then stops for the third preset time t3, and enters step 3;

[0056] Step 3, maintenance cycle parameter T=T+1, enter step 4;

[0057] Step 4. Whether T is equal to the preset maintenance cycle threshold Ts, if not, return to step 1; if yes, ...

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Abstract

The invention relates to an impeller detection method in a building centralized smoke exhaust system. The method is characterized by comprising the following steps of 1, after a user uses an indoor range hood, selecting to shut down, if necessary, entering indoor impeller self-detection, closing an angle-adjustable electric check valve at the moment, and operating at a first preset rotating speedNi in a constant-rotating-speed mode; collecting bus current values of indoor motors for k times, sorting the rotating speeds of the indoor fans for k times, selecting a maximum value and a minimum value, calculating an average value, selecting a value with relatively large deviation, and recording the value as mi; and comparing mi with bus current fluctuation thresholds ma and mb, and in different gears for continuous r1 times, if mi is larger than ma and smaller than or equal to mb, judging that oil stain accumulation of the indoor impeller of the corresponding indoor range hood occurs, thephenomena of eccentricity and unbalanced load of the indoor impeller are caused. Compared with the prior art, the impeller detection method has the advantage that the obtained judgment conclusion is more accurate.

Description

technical field [0001] The invention relates to an impeller detection method in a building centralized smoke exhaust system. Background technique [0002] At present, most of the range hoods used in the kitchens of houses and apartments are independent. Holes in the windows or walls are used to set the exhaust port of the range hood. The oil fume is discharged directly from the outer wall, which will cause pollution interference to the residents on the upper and lower floors, and will cause oil pollution to the outer wall. At the same time, it will also affect the overall appearance of the building. [0003] With the high-speed development of economy, more and more high-rise residential buildings have sprung up like mushrooms after rain. In order to maintain the appearance and image of the entire building, in many high-rise residential buildings, a centralized smoke exhaust system for the building will be adopted for centralized smoke exhaust. The public flue, the outdoor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D27/00F24C15/20
CPCF04D27/001F04D27/008F24C15/2021
Inventor 何立博
Owner NINGBO FOTILE KITCHEN WARE CO LTD