CN111706890B - Operation control method of centralized smoke exhaust system of building - Google Patents
Operation control method of centralized smoke exhaust system of building Download PDFInfo
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- CN111706890B CN111706890B CN202010452872.7A CN202010452872A CN111706890B CN 111706890 B CN111706890 B CN 111706890B CN 202010452872 A CN202010452872 A CN 202010452872A CN 111706890 B CN111706890 B CN 111706890B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Abstract
The invention relates to an operation control method of a building centralized smoke exhaust system, wherein the building centralized smoke exhaust system comprises M indoor smoke exhaust ventilators arranged in kitchens of residents on different floors, a public flue arranged in a building, an outdoor fan system arranged on the top of the building and connected with an air outlet of the public flue, and an outdoor host system electrically connected with the outdoor fan system; the method is characterized in that: a first corresponding relation between the rotating speed of a fan and the actual air exhaust volume of the indoor range hood is prestored in each indoor range hood; a second corresponding relation between the air exhaust amount of the air outlet of the public flue and the rotating speed of the outdoor fan system is prestored in the outdoor host system, and in addition, a public flue smoke exhaust leakage coefficient is also stored in the outdoor host system. Compared with the prior art, the invention has the advantages that: the running rotating speed of the outdoor unit can be accurately controlled without adopting a pressure sensor, the leakage condition of the public flue is considered, and the control is more accurate.
Description
Technical Field
The invention relates to an operation control method of a centralized smoke exhaust system of a building.
Background
At present, most of high-rise houses adopt a centralized smoke exhaust mode, an indoor range hood is connected with a public flue through a smoke pipe and a check valve, and oil smoke in a kitchen is exhausted into the public flue through the smoke pipe through the indoor range hood. However, the cooking habit of big oil smoke of Chinese people and the current situation of big air volume and big air pressure pursued by the existing range hood cause the big air volume and big pressure in the public flue, so the problem of unsmooth smoke discharge often occurs. In addition, the flue is connected through the festival during installation, and the connection between two sections flue is difficult to guarantee completely sealed, and the flue also can be inevitable to bump in preparation and transportation in addition, makes often appear crackle or aperture on the flue wall. Therefore, in the actual use process, certain leakage exists in the public flue, which is also an important reason for the smoke channeling and the smell channeling of many storied buildings. Therefore, the problems of unsmooth smoke discharge and tainted smoke and odor are a common problem of the current high-rise smoke discharge.
In order to solve the problems of unsmooth smoke discharge and taint of smoke and odor of the existing range hood, a concept of a centralized smoke discharge system is developed. The auxiliary exhaust fan arranged at the top end of the public flue generates power and is matched with an indoor power range hood, so that the aims of discharging smoke smoothly and reducing smoke and odor tainting on each floor are fulfilled. However, how to adjust the outdoor fan and the indoor fan together to realize the self-adaptive adjustment of the rotating speed of the outdoor unit according to the starting conditions of each floor, so that the flue port generates a stable negative pressure value is a technical difficulty. The conventional method is to adjust the rotating speed of the outdoor unit by feeding back a pressure value through a pressure sensor at the flue port, but considering that the pressure sensor has a failure risk in the oil smoke environment, and the accurate control of the pressure has certain difficulty. In addition, in consideration of factors such as energy conservation and noise of the outdoor fan, the outdoor fan can maintain a certain negative pressure value at the air outlet of the smoke public flue during operation, and the effect of auxiliary smoke discharge is achieved. If the public flue is completely sealed, the outdoor unit can output corresponding rotating speed according to the preset relationship between the rotating speed and the air volume of the outdoor unit according to the starting information of each floor and the counted total air volume of the system. However, in practice, the common flue has leakage in different degrees, and the leakage amount is difficult to measure, so the outdoor unit cannot know the actual discharged air volume value, i.e. it is difficult to adjust to a proper rotation speed to maintain a stable negative pressure value at the flue port. In the previous method, a pressure sensor is installed at the outlet of the flue to detect a negative pressure value, thereby adjusting the rotation speed of the outdoor unit. However, the pressure sensor is prone to failure in the oil smoke environment, and the value error measured by the pressure sensor is relatively large under the environment condition of severe roof.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an operation control method of a centralized smoke exhaust system of a building, which can accurately control the operation rotating speed of an outdoor unit under the condition of not adopting a pressure sensor and can also consider the leakage condition of a public flue aiming at the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: an operation control method of a building centralized smoke exhaust system comprises M indoor smoke exhaust ventilators arranged in kitchens of residents on different floors, wherein M is a natural number, a public flue arranged in the building, an outdoor fan system arranged on the top of the building and connected with an air outlet of the public flue, and an outdoor host system electrically connected with the outdoor fan system; the air outlets of the M indoor range hoods are communicated with a common flue through electric check valves, and the M indoor range hoods are in communication connection with an outdoor host system; the method is characterized in that: a first corresponding relation between the rotating speed of a fan and the actual air exhaust volume of the indoor range hood is prestored in each indoor range hood; the outdoor host system is pre-stored with a second corresponding relation between the air exhaust volume of the air outlet of the public flue and the rotating speed of the outdoor fan system, and is also internally provided with a public flue smoke exhaust leakage coefficient, and the operation control method of the centralized smoke exhaust system of the building comprises the following steps:
step 1, after a user opens an indoor range hood, selecting a certain air quantity gear, operating the indoor range hood to the air quantity gear, reading the fan rotating speed of the indoor range hood, calculating the actual air discharge quantity corresponding to the fan rotating speed according to a first corresponding relational expression, and automatically adjusting the air quantity gear to enable the actual air discharge quantity of the indoor range hood to be within the air quantity gear preset range value selected by the user;
step 2, all the opened indoor range hoods send the starting information and the actual exhaust air volume information of the indoor range hoods to an outdoor host system;
and 4, starting the operation of the outdoor fan system, adding the actual air exhaust quantities of all the opened indoor range hoods by the outdoor fan system to obtain the actual air exhaust total quantities of all the indoor range hoods, dividing the actual air exhaust total quantities of all the indoor range hoods by (1-common flue smoke exhaust leakage coefficient) to obtain the air exhaust quantity of the air outlet of the common flue, and calculating the rotating speed of the outdoor fan system according to the second corresponding relational expression to ensure that the rotating speed obtained by the installation and calculation of the outdoor fan system operates.
As an improvement, the common flue smoke leakage coefficient stored in the outdoor host system is obtained by the following method:
after all indoor range hoods, outdoor fan systems and outdoor host systems are installed and debugged, firstly, selecting 20% of starting rate to open the indoor range hoods on the floors, and sending corresponding starting information and actual air exhaust amount information to the outdoor host systems by the indoor range hoods; then the outdoor host system counts the actual total exhaust air volume of the opened indoor range hoods and marks the actual total exhaust air volume as Q20 total(ii) a Then, carrying out air quantity detection at the air outlet of the public flue to obtain the actual total air quantity of the air outlet of the public flue, and marking the actual total air quantity as Q20 outThe leakage coefficient of the common flue at 20% open-time is calculated and marked as Q20，Q20＝1-Q20 out/Q20 total(ii) a Then adopting the same method to obtain the flue leakage coefficient Q under the open-time rate of 40 percent40And finally, by mixing 0.5 × (Q)20+Q40) And the smoke discharge leakage coefficient of the public flue is stored in the outdoor host system.
And then improving, namely dividing the air outlet of the public flue into a plurality of small square areas, testing the air speed of each square area through an air speed sensor, multiplying the corresponding air speed by the area of the corresponding square grid to obtain the air volume value of the corresponding square area, and adding the air volume values of all the square areas to obtain the actual total air volume Q of the air outlet of the public flue20 out。
The improvement is that when 20 percent of the opening rate is selected, the indoor range hoods which are correspondingly opened are uniformly distributed at intervals; when the 40% opening rate is selected, the indoor range hoods which are correspondingly opened are also uniformly distributed at intervals.
Compared with the prior art, the invention has the advantages that: the running rotating speed of the outdoor unit can be accurately controlled without adopting a pressure sensor, so that a certain negative pressure value of the air outlet of the common flue is maintained, the leakage condition of the common flue is considered, and the control is more accurate.
Drawings
Fig. 1 is a schematic structural diagram of a centralized smoke exhaust system of a building according to an embodiment of the invention;
fig. 2 is a flowchart of an operation control method of the centralized smoke exhaust system of the building according to the embodiment of the invention.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the centralized smoke exhaust system for a building comprises M indoor smoke exhaust ventilators 11, 12 and … … 1M arranged in kitchens of residents on different floors, wherein M is a natural number, a common flue 2 arranged in the building, an outdoor fan system 3 arranged on the top of the building and connected with an air outlet of the common flue, and an outdoor host system 4 electrically connected with the outdoor fan system; air outlets of the M indoor range hoods are communicated with the common flue 2 through electric check valves 21, 22 and … … 2M, and the M indoor range hoods 11, 12 and … … 1M are in communication connection with an outdoor host system 4; a first corresponding relation between the rotating speed of the fan and the actual air exhaust volume of the indoor range hood is prestored in each indoor range hood 11, 12 and … … 1M; the second corresponding relation between the air exhaust volume of the air outlet of the public flue and the rotating speed of the outdoor fan system is prestored in the outdoor host system 4, and in addition, the public flue smoke exhaust leakage coefficient is also stored in the outdoor host system, and the operation control method of the centralized building smoke exhaust system comprises the following steps, as shown in fig. 2:
step 1, after a user opens an indoor range hood, selecting a certain air quantity gear, operating the indoor range hood to the air quantity gear, reading the fan rotating speed of the indoor range hood, calculating the actual air discharge quantity corresponding to the fan rotating speed according to a first corresponding relational expression, and automatically adjusting the air quantity gear to enable the actual air discharge quantity of the indoor range hood to be within the air quantity gear preset range value selected by the user;
step 2, all the opened indoor range hoods send the starting information and the actual exhaust air volume information of the indoor range hoods to an outdoor host system;
and 4, starting the operation of the outdoor fan system, adding the actual air exhaust quantities of all the opened indoor range hoods by the outdoor fan system to obtain the actual air exhaust total quantities of all the indoor range hoods, dividing the actual air exhaust total quantities of all the indoor range hoods by (1-common flue smoke exhaust leakage coefficient) to obtain the air exhaust quantity of the air outlet of the common flue, and calculating the rotating speed of the outdoor fan system according to the second corresponding relational expression to ensure that the rotating speed obtained by the installation and calculation of the outdoor fan system operates.
The common flue smoke discharge leakage coefficient stored in the outdoor host system is obtained by the following method:
after all indoor range hoods, outdoor fan systems and outdoor host systems are installed and debugged, firstly, selecting 20% of starting rate to open the indoor range hoods on the floors, and sending corresponding starting information and actual air exhaust amount information to the outdoor host systems by the indoor range hoods; then the outdoor host system counts the actual total exhaust air volume of the opened indoor range hoods and marks the actual total exhaust air volume as Q20 total(ii) a Then, carrying out air quantity detection at the air outlet of the public flue to obtain the actual total air quantity of the air outlet of the public flue, and marking the actual total air quantity as Q20 outThe leakage coefficient of the common flue at 20% open-time is calculated and marked as Q20，Q20＝1-Q20 out/Q20 total(ii) a Then adopting the same method to obtain the flue leakage coefficient Q under the open-time rate of 40 percent40And finally, by mixing 0.5 × (Q)20+Q40) And the smoke discharge leakage coefficient of the public flue is stored in the outdoor host system. In this embodiment, the air outlet of the public flue may be divided into a plurality of small square areas, the air speed of each square area is tested by the air speed sensor, the corresponding air speed is multiplied by the area of the corresponding grid to obtain the air volume value of the corresponding square area, and the air volume values of all the square areas are added to obtain the air outlet of the public flueActual total air quantity Q of air port20 out. When the 20% opening rate is selected, the indoor range hoods which are correspondingly opened are uniformly distributed at intervals; when the 40% opening rate is selected, the indoor range hoods which are correspondingly opened are also uniformly distributed at intervals.
Claims (4)
1. An operation control method of a building centralized smoke exhaust system comprises M indoor smoke exhaust ventilators arranged in kitchens of residents on different floors, wherein M is a natural number, a public flue arranged in the building, an outdoor fan system arranged on the top of the building and connected with an air outlet of the public flue, and an outdoor host system electrically connected with the outdoor fan system; the air outlets of the M indoor range hoods are communicated with a common flue through electric check valves, and the M indoor range hoods are in communication connection with an outdoor host system; the method is characterized in that: a first corresponding relation between the rotating speed of a fan and the actual air exhaust volume of the indoor range hood is prestored in each indoor range hood; the outdoor host system is pre-stored with a second corresponding relation between the air exhaust volume of the air outlet of the public flue and the rotating speed of the outdoor fan system, and in addition, the outdoor host system is also stored with a public flue smoke exhaust leakage coefficient, and the operation control method of the centralized smoke exhaust system of the building comprises the following steps:
step 1, after a user opens an indoor range hood, selecting a certain air quantity gear, operating the indoor range hood to the air quantity gear, reading the fan rotating speed of the indoor range hood, calculating the actual air discharge quantity corresponding to the fan rotating speed according to a first corresponding relational expression, and automatically adjusting the air quantity gear to enable the actual air discharge quantity of the indoor range hood to be within the air quantity gear preset range value selected by the user;
step 2, all the opened indoor range hoods send the starting information and the actual exhaust air volume information of the indoor range hoods to an outdoor host system;
step 3, calculating the starting rate of the indoor range hood by the outdoor host system: the outdoor host computer system counts the number of the started indoor range hoods, divides the number of the started indoor range hoods by the total number M of the indoor range hoods, and marks the result as the starting rate of the indoor range hoods;
step 3, the outdoor host system judges whether the starting rate of the indoor range hood is greater than a preset proportion, if so, the outdoor fan system is started, and the step 4 is carried out; if not, the outdoor fan system is not started, and the step 3 is returned;
and 4, starting the operation of the outdoor fan system, adding the actual air exhaust quantities of all the opened indoor range hoods by the outdoor fan system to obtain the actual air exhaust total quantities of all the indoor range hoods, dividing the actual air exhaust total quantities of all the indoor range hoods by (1-common flue smoke exhaust leakage coefficient) to obtain the air exhaust quantity of the air outlet of the common flue, and calculating the rotating speed of the outdoor fan system according to the second corresponding relational expression to ensure that the rotating speed obtained by the installation and calculation of the outdoor fan system operates.
2. The operation control method of the centralized building smoke exhaust system according to claim 1, wherein: the common flue smoke discharge leakage coefficient stored in the outdoor host system is obtained by the following method:
after all indoor range hoods, outdoor fan systems and outdoor host systems are installed and debugged, firstly, selecting 20% of starting rate to open the indoor range hoods on the floors, and sending corresponding starting information and actual air exhaust amount information to the outdoor host systems by the indoor range hoods; then the outdoor host system counts the actual total exhaust air volume of the opened indoor range hoods and marks the actual total exhaust air volume as Q20 total(ii) a Then, carrying out air quantity detection at the air outlet of the public flue to obtain the actual total air quantity of the air outlet of the public flue, and marking the actual total air quantity as Q20 outThe leakage coefficient of the common flue at 20% open-time is calculated and marked as Q20，Q20＝1-Q20 out/Q20 total(ii) a Then adopting the same method to obtain the flue leakage coefficient Q under the open-time rate of 40 percent40And finally, by mixing 0.5 × (Q)20+Q40) And the smoke discharge leakage coefficient of the public flue is stored in the outdoor host system.
3. Centralized smoke evacuation for buildings according to claim 2The operation control method of the system is characterized in that: dividing the air outlet of the public flue into a plurality of small square areas, testing the air speed of each square area through an air speed sensor, multiplying the corresponding air speed by the area of the corresponding grid to obtain the air volume value of the corresponding square area, and adding the air volume values of all the square areas to obtain the actual total air volume Q of the air outlet of the public flue20 out。
4. The operation control method of the centralized building smoke exhaust system according to claim 2, wherein: when 20% of the starting rate is selected, the indoor range hoods which are correspondingly opened are uniformly distributed at intervals; when the 40% opening rate is selected, the indoor range hoods which are correspondingly opened are also uniformly distributed at intervals.
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| CN112628813B (en) * | 2020-12-08 | 2022-10-14 | 华帝股份有限公司 | Centralized exhaust type range hood control system and air volume control method thereof |
| CN112856515A (en) * | 2021-01-11 | 2021-05-28 | 宁波方太厨具有限公司 | Outdoor fan system of centralized smoke exhaust system of building |
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