CN111336555A - Central flue system and air volume self-adaptive adjusting method thereof - Google Patents
Central flue system and air volume self-adaptive adjusting method thereof Download PDFInfo
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- CN111336555A CN111336555A CN201811555905.XA CN201811555905A CN111336555A CN 111336555 A CN111336555 A CN 111336555A CN 201811555905 A CN201811555905 A CN 201811555905A CN 111336555 A CN111336555 A CN 111336555A
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- control system
- range hood
- floor
- flue
- check valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J11/00—Devices for conducting smoke or fumes, e.g. flues
- F23J11/02—Devices for conducting smoke or fumes, e.g. flues for conducting smoke or fumes originating from various locations to the outside, e.g. in locomotive sheds, in garages
Abstract
A central flue system comprises range hoods installed on different floors, an electric check valve is installed in each smoke pipe, a flue main fan is installed in a public flue, each range hood comprises a fan, a range hood control system of the system sends a signal comprising floor positions and starting gear information to a main control system, the main control system calculates the starting rate of the whole building and outputs host power, and the range hood control system sends a signal to the electric check valve control system according to the starting rate information so as to control the opening angle of a valve plate by the electric check valve control system. The invention also discloses an air volume self-adaptive adjusting method of the central flue system. On the premise of keeping the fan of the indoor range hood, the central flue system is provided with the host at the public flue port, so that the problems that the low-rise users in high-rise residences are difficult to discharge smoke, the smoke is efficiently purified, the whole building can still discharge smoke when the host fails are solved, the service frequency and the failure rate of the valve plate of the electric check valve and the host are reduced, and the service life is prolonged.
Description
Technical Field
The invention relates to a central flue system, in particular to a central flue system and an air volume self-adaptive adjusting method thereof.
Background
At present, most of high-rise houses adopt an indoor range hood, a smoke pipe, a check valve and a public flue to be connected, so that oil smoke in a kitchen is discharged into the public flue through the smoke pipe through the indoor powered 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 of the existing range hood cause the pressure distribution in the public flue to be extremely uneven, and the problems of unsmooth smoke discharge exist, generally the smoke discharge effect of a high layer is good, the smoke discharge effect of a low layer is poor, and especially in the peak cooking period; meanwhile, the valve plate of the check valve is not closed tightly, and the phenomena of smoke return, taint of odor and the like are easily generated. Particularly, for the engineering range hood, the performance is relatively poor, so that the phenomenon that smoke is difficult to be discharged from a low floor is obvious under the conditions of high-rise houses and high starting rate.
Through simulation analysis and experiments, the conventional smoke exhausting mode (without centralized processing of the range hood on the roof) of the high-rise residence is analyzed, for example, the high-rise residence with 35 total floors (with the cross section size of 470mm × 370mm in the flue) is taken as an example, the effective flow distribution of each floor under different starting rates is shown in fig. 1, as can be seen from fig. 1, when the starting rate is relatively low (such as the starting rate below 20%), the effective flow of the low floor is also 10m3Above/min, the flow demand of each layer of users can be ensured, but when the startup rate is higher (such as 40% startup rate), the flow discharged by the lower layer of users is lower, and is only 5m3And about/min, the use requirement is difficult to meet. In addition, the flow distribution of each floor is uneven, the flow of the lower floor is small, the flow of the upper floor is large, and particularly, the higher the on-rate is, the larger the difference of the flow of the upper floor and the lower floor is.
In order to solve the problem of unsmooth smoke discharge of the existing range hood, in recent years, a concept of a central purification system is developed, a fan arranged at the top end of a public flue generates power, and the flow of each floor is uniformly distributed by matching with the adjustment of a check valve plate connected with the public flue, so that the aims of smooth smoke discharge and low-noise use scenes are fulfilled. However, the existing smoke exhaust system in this way has many problems, such as lack of oil-smoke separation of the indoor unit, most of oil and fat entering the flue through the check valve, influence on the service life of the check valve, and aggravate the pollution degree of the wall surface of the flue. In addition, because no fan is arranged indoors, when a host machine on the roof breaks down, the whole building is difficult to discharge smoke; in addition, when only a few users cook, the main machine is still in a high-power running state, and resources are wasted.
To realize that the flow of each layer of users meets the use requirement, several problems must be solved: 1. the flow of each household needs to be above a preset value, such as 8-10 m3More than min; 2. because the system smoke exhaust capacity of the flue is limited, the flow of high-rise users must be reduced to realize the improvement of the flow of low-rise users, and the flow of users on different floors is ensured to be uniform as much as possible so as to meet the flow requirement of each floor. At present, there are related patent reports that a high-power fan is arranged at a flue port, the fan of an indoor range hood is omitted, and an electric check valve is matched to regulate flow so as to meet the flow use requirements of users on each floor. However, in this way, to achieve even flow distribution of each floor, an adjustment algorithm of the valve plate angle is complex, and because the influence of factors such as the start-up rate, the start-up position, the flue structure size and the like needs to be considered, the difficulty in achieving multi-gear adjustment of the indoor unit is particularly high. In addition, in the mode, because the grease enters the flue without being effectively separated indoors, the grease can be fully accumulated in the flue, and the service life of the electric check valve can be shortened; in addition, the problem of the host being unusable due to a failure and the host still being in a higher power state at a low power-on rate is faced. In addition, the performance requirement on the main engine is higher under the condition of no power indoors.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a central flue system capable of effectively solving the problem of difficult smoke discharge for low-rise users of high-rise residences, in view of the above-mentioned current state of the art.
The second technical problem to be solved by the present invention is to provide an adaptive air volume adjusting method capable of reducing the use frequency of the electric check valve and the flue main blower in view of the above-mentioned current state of the art.
The technical scheme adopted by the invention for solving the first technical problem is as follows: this central flue system, including installing the range hood at different floors, the air outlet of every range hood all is linked together through respective tobacco pipe and public flue, all installs electric check valve in every tobacco pipe, and electric check valve is including the valve block install flue owner fan, its characterized in that in the public flue: the range hood comprises a fan, and further comprises a main control system, an electric check valve control system and a range hood control system, wherein the range hood control system can send signals comprising floor positions and starting gear information to the main control system, the main control system can calculate the starting rate of the whole building and correspondingly output the host power of the flue main fan according to the received signals, the range hood control system receives the starting rate information fed back by the main control system and can send corresponding signals to the electric check valve control system according to the starting rate information, and the electric check valve control system controls the opening angle of the valve plate.
Preferably, the control system of the range hood and the main control system transmit signals in a wireless mode.
Preferably, the range hood control system and the electric check valve control system are electrically connected through a lead.
The technical scheme adopted by the invention for solving the second technical problem is as follows: the air volume self-adaptive adjusting method of the central flue system is characterized by comprising the following steps of:
①, opening or closing the indoor range hood, and sending information to the main control system;
②, the valve plate of the electric check valve of the floor operated by the user is completely opened or closed;
③, the master control system calculates the start-up rate η and sends the information of the current start-up rate to the control system of the range hood on the start-up floor;
④, outputting corresponding power according to the starting rate by the flue main fan, and judging after receiving the starting rate information by the range hood control system of each starting floor;
if η is less than or equal to m, the valve plate of the electric check valve keeps 90 degrees unchanged;
if η is larger than m, opening the valve plates of the electric check valves of each floor to a preset angle, acquiring the power value of the current range hood fan by the range hood control system, and acquiring a current flow value Q according to the power-flow relation under the current gear of the fan;
⑤, judging whether the flow rate value Q is within the preset flow rate range [ Q1, Q2 ];
if Q is not less than Q1 and not more than Q2, maintaining the angle of the current valve plate unchanged;
if Q is larger than Q2, reducing the angle of the current valve plate by 1.8-2.2 degrees;
if Q < Q1, then increase 1.8 ~ 2.2 on the basis of current valve plate angle.
Further preferably, the valve sheet angle decrease value and the valve sheet angle increase value in the step ⑤ are both 2 °.
Further preferably, the preset angle of the valve plate of each floor in the step ④ is as shown in the following table,
| floor numbering | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Preset angle value | 90° | 90° | 88° | 88° | 87° | 87° | 85° | 85° | 83° | 83° | 81° | 81° |
| |
13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 |
| Preset angle value | 78° | 78° | 76° | 74° | 72° | 70° | 68° | 66° | 64° | 62° | 62° | 60° |
| Floor numbering | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | |
| Preset angle value | 60° | 58° | 58° | 56° | 56° | 54° | 54° | 52° | 52° | 50° | 50° |
And the angle deviation range of the valve plate of each floor is allowed to be within 0.5 degrees.
Compared with the prior art, the invention has the advantages that: on the premise of keeping an indoor range hood fan, the central flue system is provided with the host at a public flue port and is matched with the electric check valve, so that the problems that low-rise users in high-rise residences exhaust smoke difficultly, the oil smoke is purified efficiently, the whole building can still exhaust smoke when the host fails are solved, the service frequency of a valve plate of the electric check valve and the host is reduced, the failure rate of the central flue system is reduced, the service life of the central flue system is prolonged, and the air volume adaptive adjustment method of the central flue system is efficient, energy-saving and reliable and can meet the flow use requirements of all floors.
Drawings
FIG. 1 is a graph of effective air volume at each starting-up floor for a residence with 35 total floors at different start-up rates;
FIG. 2 is a diagram of the angle of the adjusting valve plate and the flow change of each floor when the main engine is started according to the embodiment of the invention;
FIG. 3 is a schematic structural diagram of an overall flue system according to an embodiment of the invention;
fig. 4 is a flowchart of an air volume adaptive adjustment method according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 2 and 3, the central flue system in this embodiment includes a range hood 1 installed on different floors, and the range hood 1 includes a fan (not shown), that is, the indoor range hood 1 can generate power. The air outlet of each range hood 1 is communicated with a common flue 3 through a respective smoke tube 2, an electric check valve 4 is arranged in each smoke tube 2, each electric check valve 4 comprises a valve plate 41, and a flue main fan 5 is arranged in the common flue 3.
The central flue system also comprises a main control system 6, an electric check valve control system 7 and a range hood control system 8, wherein the main control system 6 is installed on the roof, the electric check valve control system 7 is installed on the smoke tube 2, the range hood control system 8 is installed on the range hood 1, signal transmission is carried out between the range hood control system 8 and the main control system 6 in a wireless mode, and the range hood control system 8 and the electric check valve control system 7 are electrically connected through a wire 9.
As shown in figure 2, the total floor number is 35 (the inner section size of the flue is 470mm and × 370mm), and a range hood of a certain type (the measured maximum flow is 15.6 m)3Min, maximum static pressure 362Pa), and opening rate of 40% (14 users) and uniformly starting. Under the condition of conventional smoke discharge (square symbols), valve plates of all floors are completely opened, so that the flow of a high floor is large, the flow of discharged smoke is small due to large pressure of a low floor, and the flow range of all floors is 5-13 m3In the/min interval, the difficulty of smoke exhaust of users on the lower floor is shown. After the angle of the valve plate is adjusted (the angles of the floor starting from bottom to top are sequentially 90 degrees, 88 degrees, 87 degrees, 85 degrees, 83 degrees, 78 degrees, 72 degrees, 68 degrees, 65 degrees, 60 degrees, 58 degrees, 55 degrees, 52 degrees and 50 degrees), and under the condition of no host (circular symbols), the flow of the high floor is greatly reduced, the flow of the low floor is increased, the flow of each floor is uniformly distributed, but the flow requirement is difficult to meet at the moment. When the main machine is opened (triangle symbol), a pressure of-200 Pa is generated at the flue port, and the flow of each floor is increased by 1.5m relative to the flow of the main machine when the main machine is not opened (circle symbol)3About/min, all reach 8m3And the flow increment of each floor is related to the output power of the main machine (namely the negative pressure value of the flue port). The result in fig. 2 shows that the flow rate of each floor can also reach above the preset value and the flow rate distribution is uniform under the high open rate by adjusting the angle of the valve plate and the operation of the host, and in order to make the lower floor have a larger flow rate under the high open rate, the flow rate of the high floor must be reduced by adjusting the angle of the valve plate, and meanwhile, the opening of the host is matched to make the flue opening generate a certain negative pressure value.
The system operation thought of the central flue system is as follows: when an indoor range hood 1 is opened or closed, the range hood control system 8 sends a current signal to the electric check valve control system 7 through the wire 9, after the electric check valve control system 7 detects the signal, the valve plate 41 is opened to 90 degrees (starting up) or closed (stopping up), and meanwhile, the range hood control system 8 sends a signal including floor position and starting-up gear information to the main control system 6 through wireless transmission. The main control system 6 can know the current open-circuit rate of the whole building through real-time calculation, outputs the corresponding main machine power of the flue main fan to ensure that a certain negative pressure value is generated at a flue port, and simultaneously feeds back the current open-circuit rate to the range hood control systems 8 of all floors. The control system 8 of the range hood sends corresponding signals to the electric check valve control system 7 according to the opening rate information, and then the electric check valve control system 7 controls the opening angle of the valve plate.
After the control system 8 of the range hood receives the opening rate information fed back by the main control system 6, corresponding judgment is carried out: if the starting rate is lower, the flow rate of the low floor can meet the use requirement, so that the angle of the valve plate does not need to be adjusted; if the start-up rate is relatively high, the smoke pressure of the lower floor is relatively high at this time, and the flow of the upper floor needs to be limited to increase the flow of the lower floor. At the moment, each starting floor starts to execute an air volume adaptive algorithm to regulate the flow.
As shown in fig. 4, the method for adaptively adjusting the air volume of the central flue system specifically includes the following steps:
①, opening or closing the indoor range hood, and sending information to the main control system;
②, the valve plate of the electric check valve of the floor operated by the user is completely opened or closed;
③, the master control system calculates the start-up rate η and sends the information of the current start-up rate to the control system of the range hood on the start-up floor;
④, outputting corresponding power according to the starting rate by the flue main fan, and judging after receiving the starting rate information by the range hood control system of each starting floor;
if η is less than or equal to m, the valve plate of the electric check valve keeps 90 degrees unchanged;
if η is larger than m, opening the valve plates of the electric check valves of each floor to a preset angle, acquiring the power value of the current range hood fan by the range hood control system, and acquiring a current flow value Q according to the power-flow relation under the current gear of the fan;
⑤, judging whether the flow rate value Q is within the preset flow rate range [ Q1, Q2 ];
if Q is not less than Q1 and not more than Q2, maintaining the angle of the current valve plate unchanged;
if Q is larger than Q2, reducing the angle of the current valve plate by 2 degrees;
if Q < Q1, the current valve plate angle is increased by 2 degrees.
After power-flow judgment, the flow of the range hood on each floor can be ensured to be within a preset range [ Q1, Q2] by carrying out a plurality of cycles.
The power and flow data of the range hood have a one-to-one correspondence relationship, and the following table shows the power and flow data of a range hood of a certain model at a certain gear.
| Power (W) | 112.2 | 112.7 | 115.0 | 124.5 | 136.3 | 150.7 | 169.1 | 186.4 | 200.6 | 211.8 |
| Air volume (m)3/min) | 0.0 | 1.74 | 2.48 | 4.39 | 6.61 | 8.93 | 11.26 | 13.18 | 14.60 | 15.61 |
When the starting rate is reduced to a lower value again, the valve plates of all the starting floors are adjusted to 90 degrees. Through the mode, the air quantity of each floor can be guaranteed to be within the preset range under the condition of high opening rate, users on the lower floors can also obtain larger air quantity, frequent adjustment of the valve plates can be avoided, and the service life of the valve plates is prolonged.
In addition, the critical on-state probability m is related to the performance of the indoor range hood, the better the performance is, the larger the m is, and generally, the m can be set to be 20%.
The preset angle of the valve sheet for each floor in the above step ④ is shown in the following table,
| floor numbering | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Preset angle value | 90° | 90° | 88° | 88° | 87° | 87° | 85° | 85° | 83° | 83° | 81° | 81° |
| Floor numbering | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 |
| Preset angle value | 78° | 78° | 76° | 74° | 72° | 70° | 68° | 66° | 64° | 62° | 62° | 60° |
| Floor numbering | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | |
| Preset angle value | 60° | 58° | 58° | 56° | 56° | 54° | 54° | 52° | 52° | 50° | 50° |
And the angle deviation range of the valve plate of each floor is allowed to be within 0.5 degrees.
It can be seen that the preset valve plate angle value of each floor is related to the floor number, only the preset valve plate angle value of 35 floors is listed here, the range of the preset valve plate angle value is 90- β, β is the preset angle value of the highest floor, and the larger the total floor number is, the smaller β is.
Claims (6)
1. The utility model provides a central flue system, is including installing range hood (1) at different floors, and the air outlet of every range hood (1) all is linked together with public flue (3) through respective tobacco pipe (2), all installs electric check valve (4) in every tobacco pipe (2), and electric check valve (4) are including valve block (41) install flue owner fan (5), its characterized in that in public flue (3): the range hood is including the fan, and this system still includes main control system (6), electronic check valve control system (7) and range hood control system (8), range hood control system (8) can send the signal including floor position and start gear information extremely main control system (6), main control system (6) can calculate the rate of opening of whole building and the corresponding host computer power of exporting flue main air fan according to the signal received, range hood control system (8) receive the rate of opening information that main control system (6) fed back to can send corresponding signal according to this rate of opening information and give electronic check valve control system (7), and then by electronic check valve control system (7) control the angle of opening of valve block.
2. The central flue system of claim 1 wherein: and the range hood control system (8) and the main control system (6) are in signal transmission in a wireless mode.
3. The central flue system of claim 1 wherein: the range hood control system (8) is electrically connected with the electric check valve control system (7) through a lead (9).
4. The air volume self-adaptive adjusting method of the central flue system as claimed in claim 1, characterized by comprising the following steps:
①, opening or closing the indoor range hood, and sending information to the main control system;
②, the valve plate of the electric check valve of the floor operated by the user is completely opened or closed;
③, the master control system calculates the start-up rate η and sends the information of the current start-up rate to the control system of the range hood on the start-up floor;
④, outputting corresponding power according to the starting rate by the flue main fan, and judging after receiving the starting rate information by the range hood control system of each starting floor;
if η is less than or equal to m, the valve plate of the electric check valve keeps 90 degrees unchanged;
if η is larger than m, opening the valve plates of the electric check valves of each floor to a preset angle, acquiring the power value of the current range hood fan by the range hood control system, and acquiring a current flow value Q according to the power-flow relation under the current gear of the fan;
⑤, judging whether the flow rate value Q is within the preset flow rate range [ Q1, Q2 ];
if Q is not less than Q1 and not more than Q2, maintaining the angle of the current valve plate unchanged;
if Q is larger than Q2, reducing the angle of the current valve plate by 1.8-2.2 degrees;
if Q < Q1, then increase 1.8 ~ 2.2 on the basis of current valve plate angle.
5. The adaptive air volume adjusting method for the central flue system as claimed in claim 4, wherein the valve sheet angle decrease value and the valve sheet angle increase value in the step ⑤ are both 2 °.
6. The adaptive air volume adjusting method for the central flue system according to claim 4, wherein the preset angle of the valve sheet of each floor in the step ④ is as shown in the following table,
And the angle deviation range of the valve plate of each floor is allowed to be within 0.5 degrees.
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Cited By (9)
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| CN112212376A (en) * | 2020-09-18 | 2021-01-12 | 华帝股份有限公司 | Central flue system and air flow control method |
| CN112377958A (en) * | 2020-10-20 | 2021-02-19 | 华帝股份有限公司 | Central flue air volume control method and system |
| CN112524664A (en) * | 2020-11-19 | 2021-03-19 | 华帝股份有限公司 | Air volume control method and system for central flue system |
| CN112628813A (en) * | 2020-12-08 | 2021-04-09 | 华帝股份有限公司 | Centralized exhaust type range hood control system and air volume control method thereof |
| CN113357688A (en) * | 2021-07-27 | 2021-09-07 | 杭州老板电器股份有限公司 | Central range hood system control method and device and central range hood system |
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| CN113654092A (en) * | 2021-07-13 | 2021-11-16 | 华帝股份有限公司 | Flow distribution method of central flue system and central flue system |
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| CN113357688A (en) * | 2021-07-27 | 2021-09-07 | 杭州老板电器股份有限公司 | Central range hood system control method and device and central range hood system |
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| CN113883572A (en) * | 2021-11-08 | 2022-01-04 | 杭州老板电器股份有限公司 | Floor configuration method and system for power distribution valve of central range hood and electronic equipment |
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