CN111197778B - Flow distribution control method for central flue system of high-rise building - Google Patents
Flow distribution control method for central flue system of high-rise building Download PDFInfo
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- CN111197778B CN111197778B CN201811373987.6A CN201811373987A CN111197778B CN 111197778 B CN111197778 B CN 111197778B CN 201811373987 A CN201811373987 A CN 201811373987A CN 111197778 B CN111197778 B CN 111197778B
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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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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F17/00—Vertical ducts; Channels, e.g. for drainage
- E04F17/02—Vertical ducts; Channels, e.g. for drainage for carrying away waste gases, e.g. flue gases; Building elements specially designed therefor, e.g. shaped bricks or sets thereof
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Abstract
The invention relates to a flow distribution control method of a central flue system of a high-rise building, wherein the central flue system comprises indoor units arranged on different floors, an air outlet of each indoor unit is communicated with a common flue through respective smoke pipes, and a preset target flow QL is in a target range [ Qx, Qd ], and the invention has the advantages that: the flow distribution control method for the high-rise building does not need sensors such as power or current, pressure and flow velocity, only needs to feed back a current gear and a current rotating speed, detects the rotating speed by using the rotating speed of the current gear or calculates the rotating speed by using back electromotive force, then calculates the current actual flow by using the one-to-one correspondence relation between the rotating speed and the flow under the same gear, calculates the difference between the current actual flow and a target flow, selects and adjusts at least one gear, calculates whether the current actual flow can be controlled within a flow range, can realize the basic guarantee of effective air volume and eliminate the difference of smoke exhaust effects of different floors, and has relatively high-efficiency, energy-saving and relatively less loss through the frequency conversion or gear shifting control of an indoor range hood.
Description
Technical Field
The invention relates to a central flue system, in particular to a flow distribution control method of a central flue system of a high-rise building.
Background
At present, newly-built building floors in cities are generally higher and higher, and are mainly based on engineering fine decoration, and most high-rise residences adopt indoor range hoods, smoke pipes, check valves and public flues to be connected, so that oil smoke in a kitchen is discharged into the public flues through the smoke pipes by the indoor powered range hoods. The high-rise public flue is generally arranged at the top, the opening and closing condition of a range hood of a user can influence the outlet resistance of the system, the increase of the flue distance can lead to the increase of the loss along the way, and the exhaust resistance of the range hood on the building can lead to the increase of the exhaust resistance of the smoke on the building, so that the pressure distribution in the public flue is extremely uneven, the high-rise smoke exhaust effect is generally good, the large-pressure smoke exhaust effect of the bottom layer is poor, and particularly, the smoke exhaust effect of the bottom layer is worse in the cooking. However, the cross-sectional area of the common flue channel is generally defined by building design specifications, and when the area of the flue channel cannot be increased, the flue is blocked by increasing the air volume, so that the flow speed and the noise of the whole flue system are increased.
Although the prior art discloses a scheme for controlling the smoke exhaust air volume of different floors within a certain range through the control of a valve, the scheme is characterized in that the on-way resistance generated by the length of a flue is replaced by increasing the local resistance of a valve plate in a high-rise building, and finally the balance of the total resistance system from the air outlets of different smoke exhaust machines to the top end is realized. Therefore, the control method realizes balanced flow regulation by increasing resistance through the outlet, has relatively large energy consumption, and is not efficient and energy-saving. In summary, the flow distribution control method of the range hood in the existing high-rise building needs to be further improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-rise building central flue system flow distribution control method which can realize the basic guarantee of effective air volume, saves energy in the control process and has high efficiency aiming at the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the flow distribution control method of the high-rise building central flue system comprises indoor units arranged on different floors, and an air outlet of each indoor unit is communicated with a common flue through respective smoke pipes, and is characterized in that: measuring different gear s, fitting the relation with the flow Q at different rotating speed n to obtain a functional formula Q (s, n) ═ As+Bsn+Csn2+Dsn3And presetting the target flow QL of the indoor unit in a target range [ Qx, Qd ]]In the interior of said container body,
the flow distribution control method comprises the following steps:
firstly, when any indoor unit user starts up, the indoor unit user operates at a default rotating speed or gear;
secondly, calculating (or selecting a rotating speed detection module) through back electromotive force to obtain the current rotating speed;
inquiring the current operating gear s and the multiple term coefficients of the corresponding functional expression;
fourthly, calculating the current actual flow Qm according to the functional expression and the rotating speed;
feeding back information such as starting up and current actual flow to the host computer under the running state of the host computer of the central flue system, and determining whether to update the current target flow QL or not by the host computer according to the current starting up rate;
or, under the single machine running state, reading the target flow value from the storage unit;
sixthly, judging whether the deviation between the current actual flow and the target flow is in a set allowable range,
if the current time is within the allowable range, no adjustment is needed;
if the gear is not in the allowable range, firstly judging whether the current gear or the rotating speed is the highest (or the lowest),
under the running state of the host, if the lowest or highest gear flow still exceeds the limit, feeding back to the host to adjust the target flow of the system;
under the single machine running state, if the lowest or highest gear flow still exceeds the limit, the current gear running is directly kept and prompted;
if the current target flow is not the lowest or highest gear, calculating the ratio of the latest target flow lower limit Qx to the actual flow QM;
eighthly, adjusting the gear value of at least one gear according to the corresponding ratio;
ninthly, adjusting a driving motor;
waiting for a period of time in the red (R) and waiting for adjustment to be stable;
Preferably, the judging process of the fifth step is as follows:
the host computer calculates the current on-time rate g and judges whether g is in the range of m, n,
if m is less than or equal to g and less than or equal to n, the target flow QL is unchanged;
if g is less than m, the target flow QL is increased;
if g > n, the target flow QL is adjusted smaller.
Preferably, there are 3 gear positions adjusted in the step (viii),
judging that the current gear or the rotating speed is not the highest,
if Qx/Qm is less than h, increasing by 1 gear;
if h is less than or equal to Qx/Qm is less than or equal to i, increasing 2 gears;
if i is less than Qx/Qm, increasing 3 gears;
judging that the current gear or the rotating speed is not the lowest,
if Qx/Qm is less than j, 1 gear is lowered;
if j is less than or equal to Qx/Qm is less than or equal to k, 2 gears are reduced;
if k is less than Qx/Qm, 3 gears are reduced;
wherein h, i, j, k are preset values.
As a preferable scheme of the main machine, the main machine is an outdoor main machine with a booster fan, and the booster fan is arranged at the top of the public flue.
As another preferable scheme of the host, the host is one of the turned-on indoor units.
Compared with the prior art, the invention has the advantages that: the flow distribution control method for the high-rise building does not need sensors such as power or current, pressure and flow velocity, only needs to feed back a current gear and a current rotating speed, detects the rotating speed by using the rotating speed of the current gear or calculates the rotating speed by using back electromotive force, then calculates the current actual flow by using the one-to-one correspondence relation between the rotating speed and the flow under the same gear, calculates the difference between the current actual flow and a target flow, selects and adjusts at least one gear, calculates whether the current actual flow can be controlled within a flow range, can realize the basic guarantee of effective air volume and eliminate the difference of smoke exhaust effects of different floors, and has relatively high-efficiency, energy-saving and relatively less loss through the frequency conversion or gear shifting control of an indoor range hood.
Drawings
Fig. 1 is a schematic view of a pressure-flow curve and a system resistance curve of an indoor unit according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of the present invention;
FIG. 3 is a flow chart of a flow control method of a host operating scheme according to an embodiment of the present invention;
FIG. 4 is a flow chart of a host target traffic adjustment process according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a topology of a master and a slave according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of another topology of the master and slave devices according to the embodiment of the present invention;
fig. 7 is a flowchart of a flow control method of a stand-alone operation scheme 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. 1, the flow rate distribution control method of the present embodiment may be configured such that different steps s are measured in advance, and the relationship with the flow rate Q at different rotation speeds n is fitted to a function formula Q (s, n) ═ as+Bsn+Csn2+Dsn3For example, the flow Q1 corresponding to the rotation speed n1 at the second gear, the flow Q2 corresponding to n2 at the second gear, and the like may be directly recorded in a table, and when the subsequent actual second gear runs at n5, the current actual flow Q5 may be calculated by using a difference function such as a newton difference or a lagrangian difference, and then the flow after the gear is adjusted is estimated by using an intersection point of the resistance curve and the PQ curve, or the gear is adjusted directly according to a ratio of the target flow and the current actual flow.
As shown in fig. 2, the central flue system of the present embodiment includes indoor units 1 installed on different floors, i.e., range hoods, and the air outlet of each indoor unit 1 is communicated with a common flue 3 through a respective smoke tube 2.
As shown in fig. 3, the flow rate distribution control method includes the following steps when the target indoor unit flow rate QL is preset within the target range [ Qx, Qd ] and the host is operating:
firstly, when any indoor unit user starts up, the indoor unit user operates at a default rotating speed or gear;
secondly, obtaining the current rotating speed through back electromotive force calculation or an optional rotating speed detection module;
inquiring the current operating gear s and the multiple term coefficients of the corresponding functional expression;
fourthly, calculating the current actual flow Qm according to the functional expression and the rotating speed;
feeding back information such as starting up and current actual flow to the host computer under the running state of the host computer of the central flue system, and determining whether to update the current target flow QL or not by the host computer according to the current starting up rate;
sixthly, judging whether the deviation between the current actual flow and the target flow is in a set allowable range,
if the current time is within the allowable range, no adjustment is needed;
if the gear is not in the allowable range, firstly judging whether the current gear or the rotating speed is the highest (or the lowest),
under the running state of the host, if the lowest or highest gear flow still exceeds the limit, feeding back to the host to adjust the target flow of the system;
if the current target flow is not the lowest or highest gear, calculating the ratio of the latest target flow lower limit Qx to the actual flow QM;
eighthly, adjusting the gear value of at least one gear according to the corresponding ratio;
ninthly, adjusting a driving motor;
waiting for a period of time in the red (R) and waiting for adjustment to be stable;
Wherein, as shown in fig. 4, the judging process of the step (v) is as follows:
the host computer calculates the current on-time rate g and judges whether g is in the range of m, n,
if m is less than or equal to g and less than or equal to n, the target flow QL is unchanged;
if g is less than m, the target flow QL is increased;
if g > n, the target flow QL is adjusted smaller.
The number of the gears adjusted in the step (b) is 3,
judging that the current gear or the rotating speed is not the highest,
if Qx/Qm is less than h, increasing by 1 gear;
if h is less than or equal to Qx/Qm is less than or equal to i, increasing 2 gears;
if i is less than Qx/Qm, increasing 3 gears;
judging that the current gear or the rotating speed is not the lowest,
if Qx/Qm is less than j, 1 gear is lowered;
if j is less than or equal to Qx/Qm is less than or equal to k, 2 gears are reduced;
if k is less than Qx/Qm, 3 gears are reduced;
wherein h, i, j, k are preset values.
As shown in fig. 2 and 5, an outdoor main unit with a booster fan 4 is used as a main unit, and the booster fan 4 is installed on the top of the common flue 3.
As shown in fig. 6, one of the powered-on indoor units 1 serves as a host.
As shown in fig. 7, in the case of stand-alone operation,
firstly, when any indoor unit user starts up, the indoor unit user operates at a default rotating speed or gear;
secondly, obtaining the current rotating speed through a counter electromotive force calculation or rotating speed detection module;
inquiring the current operating gear s and the multiple term coefficients of the corresponding functional expression;
fourthly, calculating the current actual flow Qm according to the functional expression and the rotating speed;
reading a target flow value from the storage unit in a single machine running state;
sixthly, judging whether the deviation between the actual flow and the target flow is in a set allowable range,
if the current time is within the allowable range, no adjustment is needed;
if the gear is not in the allowable range, firstly judging whether the current gear or the rotating speed is the highest (or the lowest),
under the single machine running state, if the lowest or highest gear flow still exceeds the limit, the current gear running is directly kept and prompted;
if the current target flow is not the lowest or highest gear, calculating the ratio of the latest target flow lower limit Qx to the actual flow QM;
eighthly, adjusting the gear value of at least one gear according to the corresponding ratio;
ninthly, adjusting a driving motor;
waiting for a period of time in the red (R) and waiting for adjustment to be stable;
In summary, the flow distribution control method of this embodiment does not need sensors such as power, current, pressure, and flow velocity, but only needs to feed back the current gear and the rotation speed, uses the rotation speed of the current gear to detect or calculate the rotation speed by using the back electromotive force, then uses the one-to-one correspondence relationship between the rotation speed and the flow at the same gear to calculate the current actual flow, calculates the difference between the current actual flow and the target flow, selectively adjusts at least 1 gear, and calculates whether the current actual flow can be controlled within the flow range. The whole control method can realize basic guarantee of effective air quantity and eliminate the difference of smoke exhaust effects of different floors, and through frequency conversion or gear shifting control of the indoor range hood, the control process is efficient and energy-saving, and the loss is less.
Claims (5)
1. The utility model provides a flow distribution control method of high-rise building central flue system, central flue system includes host computer and installs indoor set (1) at different floors, and the air outlet of every indoor set (1) all is linked together with public flue (3) through respective tobacco pipe (2), its characterized in that: measuring different gear s, fitting the relation with the flow Q at different rotating speed n to obtain a functional formula Q (s, n) ═ As+Bsn+Csn2+Dsn3And presetting the target flow QL of the indoor unit in a target range [ Qx, Qd ]]In the interior of said container body,
the flow distribution control method comprises the following steps:
firstly, when any indoor unit user starts up, the indoor unit user operates at a default rotating speed or gear;
secondly, obtaining the current rotating speed through a counter electromotive force calculation or rotating speed detection module;
inquiring the current operating gear s and the multiple term coefficients of the corresponding functional expression;
fourthly, calculating the current actual flow Qm according to the functional expression and the rotating speed;
feeding back information such as startup and current actual flow to the host computer under the running state of the host computer, and determining whether to update the current target flow QL or not by the host computer according to the current startup rate;
or, under the single machine running state, reading the target flow value from the storage unit;
sixthly, judging whether the deviation between the current actual flow and the target flow is in a set allowable range,
if the current time is within the allowable range, no adjustment is needed;
if the gear is not in the allowable range, firstly judging whether the current gear or the rotating speed is the highest (or the lowest),
under the running state of the host, if the lowest or highest gear flow still exceeds the limit, feeding back to the host to adjust the target flow of the system;
under the single machine running state, if the lowest or highest gear flow still exceeds the limit, the current gear running is directly kept and prompted;
if the current target flow is not the lowest or highest gear, calculating the ratio of the latest target flow lower limit Qx to the actual flow QM;
eighthly, adjusting the gear value of at least one gear according to the corresponding ratio;
ninthly, adjusting a driving motor;
waiting for a period of time in the red (R) and waiting for adjustment to be stable;
2. The flow distribution control method for the central flue system of high-rise buildings according to claim 1, characterized in that: the judging process of the fifth step is as follows:
the host computer calculates the current on-time rate g and judges whether g is in the range of m, n,
if m is less than or equal to g and less than or equal to n, the target flow QL is unchanged;
if g is less than m, the target flow QL is increased;
if g > n, the target flow QL is adjusted smaller.
3. The flow distribution control method for the central flue system of high-rise buildings according to claim 1, characterized in that: there are 3 gears adjusted in the step (viii),
judging that the current gear or the rotating speed is not the highest,
if Qx/Qm is less than h, increasing by 1 gear;
if h is less than or equal to Qx/Qm is less than or equal to i, increasing 2 gears;
if i is less than Qx/Qm, increasing 3 gears;
judging that the current gear or the rotating speed is not the lowest,
if Qx/Qm is less than j, 1 gear is lowered;
if j is less than or equal to Qx/Qm is less than or equal to k, 2 gears are reduced;
if k is less than Qx/Qm, 3 gears are reduced;
wherein h, i, j, k are preset values.
4. The flow distribution control method for the central flue system of high-rise buildings according to any claim 1 to 3, characterized in that the host is an outdoor host with a booster fan (4), and the booster fan (4) is installed on the top of the common flue (3).
5. The method as claimed in any one of claims 1 to 3, wherein the host machine is one of the activated indoor machines (1).
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| CN112524662B (en) * | 2020-11-18 | 2022-11-29 | 华帝股份有限公司 | Smoke collection and exhaust control method and system |
| CN114234249B (en) * | 2021-12-17 | 2023-12-08 | 杭州老板电器股份有限公司 | Control method and device for identifying flue state |
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