CN112524663B - Air quantity adjusting control method and system for central flue system - Google Patents
Air quantity adjusting control method and system for central flue system Download PDFInfo
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- CN112524663B CN112524663B CN202011296776.4A CN202011296776A CN112524663B CN 112524663 B CN112524663 B CN 112524663B CN 202011296776 A CN202011296776 A CN 202011296776A CN 112524663 B CN112524663 B CN 112524663B
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000003247 decreasing effect Effects 0.000 claims abstract description 38
- 238000004891 communication Methods 0.000 claims description 52
- 239000000779 smoke Substances 0.000 claims description 28
- 238000012544 monitoring process Methods 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 abstract description 27
- 230000000694 effects Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses an air quantity adjusting control method and a control system of a central flue system, wherein the air quantity adjusting control method of the central flue system comprises the following steps: acquiring working parameters of the range hood and transmitting the working parameters to a host; the working parameters comprise the working state of the range hood and the starting sequence number of the range hood; counting the number of all the range hoods in the working state by the host machine, and adjusting the target rotating speed according to a preset relation; the host adjusts the opening and closing angles of the electric valves according to the relation between the starting sequence number of the range hoods and the preset number, starting sequence, starting angle and decreasing angle of the range hoods; in the process, the distribution rule of the opening and closing angles is summarized and preset in the host in advance, and the distribution of the opening and closing angles changes along with the number of the range hoods in the working state; in addition, the distribution rule of the opening and closing angles preset in the host machine in the scheme takes the starting sequence number as an important parameter, so that reasonable distribution of air quantity is realized.
Description
Technical Field
The invention belongs to the technical field of central flue air volume adjustment, and particularly relates to an air volume adjustment control method and system of a central flue system.
Background
In recent years, the concept of a central purification system is developed, and the central purification system generates power through a fan arranged at the top end of a public flue and is matched with an electric valve connected with the public flue to realize uniform flow distribution of each floor, so that the purposes of smooth smoke discharge and low noise use scenes are achieved.
Although the structure is widely applied, how to realize reasonable distribution of the air quantity of each floor is always a difficult problem in the industry. The traditional solution is that the rotation speed or frequency of the flue fan is regulated through an outdoor control system, the opening angle of the valve plate is controlled through a check valve control system, although the flow uniform distribution method only needs to preset the valve plate preset angles under two different starting rates, the flow uniform distribution can be ensured through the judgment of the opening rate, but the following problems exist: the preset angle of each layer does not consider the starting sequence (i.e. does not consider what the range hood is started), so that the distribution effect is poor; and preset angle adjustment is difficult, if the project (floor height, flue size etc.) is different, the preset angle that every motorised valve inside was stored all needs to change, and actual operation is difficult.
Disclosure of Invention
In order to solve the problems, the invention provides an air quantity adjusting and controlling method of a central flue system, which realizes reasonable distribution of air quantity of each floor.
It is another object of the present invention to provide a control system for a central flue.
The technical scheme adopted by the invention is as follows:
the air quantity regulation control method of the central flue system comprises a range hood and a public flue which are positioned on each floor, wherein a main machine is arranged at the top of the public flue, an electric valve is connected with the public flue and the range hood, and the air quantity is controlled by regulating the opening and closing angle of the electric valve; the method comprises the following steps of:
s1, an electric valve assembly acquires working parameters of the range hood and transmits the working parameters to a host; the working parameters comprise the working state of the range hood and the starting sequence number of the range hood;
s2, counting the number of all the range hoods in the working state by the host machine, and adjusting the target rotating speed of the host machine according to the preset relation among the number of the range hoods, the air quantity and the air pressure;
and S3, the host machine works at the target rotating speed, and meanwhile, the host machine adjusts the opening and closing angles of the electric valves according to the relation between the starting sequence number of the range hoods and the preset number, starting sequence, starting angle and decreasing angle of the range hoods.
Preferably, the step S2 of counting the number of all the range hoods in the working state by the host machine, and adjusting the target rotation speed of the host machine according to the preset relationship among the number of the range hoods, the air quantity and the air pressure, specifically: the host comprises a fan:
s21, determining the maximum rotation speed w1 of the fan and the corresponding number n1 of the operating range hoods at the rotation speed; determining the minimum rotation speed w2 of the fan and the number n2 of the range hoods in the corresponding working state under the rotation speed;
s22, judging whether n is smaller than n2 or not, and if so, adjusting the rotating speed of the fan to w2; otherwise, the process goes to S23;
s23, judging whether n is more than n1 or not, and if so, adjusting the rotating speed of the fan to w1; otherwise, S24 is entered;
s24, determining a target rotating speed of the fan through the following formula;
w＝w2+(w1-w2)/(n1-n2)*(n-n2)；
in the above formula, w is the target rotation speed of the fan, and n is the number of the range hoods in the working state counted by the host.
Preferably, in the step S3, the host adjusts the opening and closing angle of the electric valve according to the relationship between the number of the start sequences of the range hoods and the number, the start sequence, the start angle and the decreasing angle of the preset range hoods, specifically:
s31, the host machine corresponds to the initial sequence according to the relation among the number of the preset range hoods, the initial sequence, the initial angle and the decreasing angle through the counted number of the range hoods in the S2;
s32, judging the relation between the starting sequence number and the initial sequence of the range hood, and adjusting the opening and closing angles of the electric valves according to the judging result.
Preferably, in S32, the opening and closing angle of the electric valve is adjusted according to the judgment result, specifically:
judging whether K is smaller than A or not;
if so, adjusting the opening and closing angle of the electric valve to 90 degrees;
otherwise, the opening and closing angle is adjusted according to the following formula: b- (k-a) C;
wherein K is the number of start sequences, A is the initial sequence, B is the real angle, and C is the decreasing angle.
Preferably, in S21, determining the maximum rotation speed w1 of the fan and the number n1 of operating range hoods corresponding to the rotation speed, and determining the minimum rotation speed w2 of the fan and the number n2 of operating range hoods corresponding to the rotation speed are all tests performed when all the operating range hoods are placed on a low floor;
wherein, the low floor specifically means: the floor where the range hood furthest from the host is located.
Preferably, the electric valve assembly in S1 obtains the working parameters of the range hood and transmits the working parameters to the host, specifically:
s11, a smoke ventilator operation monitoring module collects the working state of the smoke ventilator and transmits the working state to an electric valve control module through a smoke ventilator communication module;
s12, the electric valve control module controls the electric valve to be opened or closed according to the working state;
s13, the electric valve communication module transmits the state of the electric valve to the host;
s14, the host determines the working state of the range hood and the starting sequence number of the range hood through the state of the electric valve.
Preferably, in the step S2, the target rotation speed of the host is adjusted, specifically: and adjusting the target rotating speed of the host machine through the frequency converter.
The control system of the central flue is used for realizing the air quantity regulation control method of the central flue system and comprises a host, a public flue, an air pipe, an electric valve assembly and a range hood, wherein the host is positioned at the top end of the public flue, the range hoods on different floors are communicated with the public flue through the air pipe, and the electric valve assembly is arranged on the air pipe and used for regulating the air quantity;
the electric valve component is used for acquiring working parameters of the range hood and transmitting the working parameters to the host; the host computer counts the number of all the range hoods in the working state and adjusts the target rotating speed of the range hoods; the host is also used for adjusting the opening and closing angles of the electric valve components.
Preferably, the host comprises a first host communication module, a host control module and a fan which are sequentially connected, wherein the number of the range hoods, the initial sequence, the initial angle and the decreasing angle are preset in the host control module, and the host also comprises a second host communication module connected with the host control module.
Preferably, the electric valve assembly comprises a smoke machine operation monitoring module, an electric valve control module, a first communication module, a second communication module, a motor module and an electric valve, wherein the smoke machine operation monitoring module, the electric valve control module, the motor module and the electric valve are sequentially connected, and the electric valve control module is further connected with the first communication module and the second communication module.
Compared with the prior art, when the range hood is used, the electric valve component acquires the working parameters of the range hood and transmits the working parameters to the host; the working parameters comprise the working state of the range hood and the starting sequence number of the range hood; then, counting the number of all the range hoods in the working state by the host machine, and adjusting the target rotating speed of the host machine according to the relation among the preset number of the range hoods, the air quantity and the air pressure; the host machine works at the target rotating speed, and simultaneously, the host machine adjusts the opening and closing angles of the electric valves according to the relation between the starting sequence number of the range hoods and the preset number, starting sequence, starting angle and decreasing angle of the range hoods;
in the process, the distribution rule of the opening and closing angles is summarized and preset in the host in advance, and the distribution of the opening and closing angles changes along with the number of the range hoods in the working state; in addition, the distribution rule of the opening and closing angles preset in the host machine in the scheme takes the starting sequence number as an important parameter, and the different starting time can influence the oil smoke generation amount;
in addition, because the opening and closing angles of the electric valves corresponding to the range hoods in the scheme are adjusted along with a preset distribution rule, the invention only needs to modify the decreasing angles in the distribution rule according to different projects, and the preset angles stored in each electric valve in the prior art are all required to be adjusted, so that the actual operation is difficult.
Drawings
Fig. 1 is a flowchart of a method for controlling air volume adjustment of a central flue system according to embodiment 1 of the present invention;
fig. 2 is a detailed flowchart of a method for controlling air volume adjustment of a central flue system according to embodiment 1 of the present invention;
fig. 3 is a graph showing the air distribution of the central flue system according to embodiment 1 of the present invention when the number of the operating range hoods is the same;
fig. 4 is a graph of air distribution under the same working condition in the air quantity adjustment control method of a central flue system provided in embodiment 1 of the present invention;
FIG. 5 is a schematic structural diagram of a control system for a central flue according to embodiment 2 of the present invention;
FIG. 6 is a block diagram of a host in a control system for a central flue according to embodiment 2 of the present invention;
FIG. 7 is a block diagram showing the structure of an electrically operated valve assembly in a control system for a central flue according to embodiment 2 of the present invention;
fig. 8 is a block diagram of a range hood in a control system for a central flue according to embodiment 2 of the present invention.
The system comprises a main engine 1, a public flue 2, an air pipe 3, an electric valve assembly 4, an electric valve assembly 5, a range hood 6, a fire valve 11, a first main engine communication module 12, a main engine control module 13, a fan 14, a second main engine communication module 15, a main engine power supply module 41, a smoke engine operation monitoring module 42, an electric valve control module 43, a first communication module 44, a second communication module 45, a motor module 46, an electric valve 47, an electric valve power supply module 51, a control panel 52, a smoke engine power supply module 53, a switch button 54 and an internal fan.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it should be clearly understood that terms such as "vertical", "horizontal", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "horizontal", and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of describing the present invention, and do not mean that the apparatus or element referred to must have a specific orientation or position, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
The embodiment 1 of the invention provides an air quantity adjusting and controlling method of a central flue system, wherein the central flue system comprises a range hood and a public flue which are positioned on each floor, a main machine is arranged at the top of the public flue, an electric valve is connected with the public flue and the range hood, and the air quantity is controlled by adjusting the opening and closing angles of the electric valve; as shown in fig. 1, the method is implemented according to the following steps:
s1, an electric valve assembly acquires working parameters of the range hood and transmits the working parameters to a host; the working parameters comprise the working state of the range hood and the starting sequence number of the range hood;
s2, counting the number of all the range hoods in the working state by the host machine, and adjusting the target rotating speed of the host machine according to the preset relation among the number of the range hoods, the air quantity and the air pressure;
and S3, the host machine works at the target rotating speed, and meanwhile, the host machine adjusts the opening and closing angles of the electric valves according to the relation between the starting sequence number of the range hoods and the preset number, starting sequence, starting angle and decreasing angle of the range hoods.
In this way, the embodiment summarizes the rules among the number of the range hoods, the starting sequence, the starting angle, the decreasing angle and the opening and closing angle, and presets the rules in the host in advance, and the distribution of the opening and closing angle changes along with the number of the range hoods in a working state; in this embodiment, the distribution rule of the preset opening and closing angles in the host takes the number of startup sequences as an important parameter, because different startup time affects the oil smoke generation amount, the earlier the startup, the more oil smoke is generated, and otherwise, the less oil smoke is generated.
Specifically, the number of boot sequences refers to what number of boots means;
for example, assuming that the number of viewing sequences of a range hood is 5, it means that in a certain fixed period of time, all range hoods located in the central flue system are the fifth to be started.
In addition, because the opening and closing angles of the electric valves corresponding to the range hoods in the scheme are adjusted along with a preset distribution rule, the invention only needs to modify the decreasing angles in the distribution rule according to different projects, and the preset angles stored in each electric valve in the prior art are all required to be adjusted, so that the actual operation is difficult.
In particular embodiments:
as shown in fig. 2, in S2, the host calculates the number of all the range hoods in the working state, and adjusts the target rotation speed of the host according to the preset relationship between the number of the range hoods, the air quantity and the air pressure, specifically: the host comprises a fan:
s21, determining the maximum rotation speed w1 of the fan and the corresponding number n1 of the operating range hoods at the rotation speed; determining the minimum rotation speed w2 of the fan and the number n2 of the range hoods in the corresponding working state under the rotation speed;
s22, judging whether n is smaller than n2 or not, and if so, adjusting the rotating speed of the fan to w2; otherwise, the process goes to S23;
s23, judging whether n is more than n1 or not, and if so, adjusting the rotating speed of the fan to w1; otherwise, S24 is entered;
s24, determining a target rotating speed of the fan through the following formula;
w＝w2+(w1-w2)/(n1-n2)*(n-n2)；
in the above formula, w is the target rotation speed of the fan, and n is the number of the range hoods in the working state counted by the host.
In the embodiment, determining the maximum rotation speed w1 of the fan and the number n1 of the operating range hoods corresponding to the rotation speed, and determining the minimum rotation speed w2 of the fan and the number n2 of the operating range hoods corresponding to the rotation speed are all tests performed when all the operating range hoods are placed on a low floor;
wherein, the low floor specifically means: the floor where the range hood farthest from the host is located;
the significance of this is: if the range hood is completely arranged at the bottom layer and started, the path of the smoke is longest, the loss is greatest, and the calculated resistance is greatest, so that the corresponding calculated rotating speed can be ensured, the power performance of the range hood is sufficient, and the power requirement of a system can be met.
In order to more specifically understand the concepts of the rotation speed and the number of the range hoods in the working state, fluid mechanics simulation is carried out, if the design is carried out according to the air quantity of 720m3/h of each household, wherein the maximum rotation speed of a fan is 1400rpm, 14 households can be supported to use simultaneously, namely, the number of the corresponding range hoods under the maximum rotation speed of the fan is 14; the minimum rotating speed of the fan is 840rpm, 6 users can be supported to use simultaneously, and the number of the corresponding range hoods is 6 under the minimum rotating speed of the fan.
More specifically, in S2:
assuming that the maximum rotation speed of the fan is 1400rpm, the number of the corresponding range hoods is 14; the minimum rotating speed of the fan is 840rpm, and the number of the corresponding range hoods is 6;
when the number of the range hoods in the working state is 8, the target rotating speed is as follows:
w＝w2+(w1-w2)/(n1-n2)*(n-n2)＝1230rpm；
when the number of the range hoods in the working state is 5, the target rotating speed is the minimum rotating speed of the fan, namely 840rpm;
when the number of the range hoods in the working state is 16, the target rotating speed is the maximum rotating speed of the fan, namely 1400rpm.
In another embodiment:
in the step S3, the host adjusts the opening and closing angles of the electric valve according to the relation between the starting sequence number of the range hood and the preset quantity, starting sequence, starting angle and decreasing angle of the range hood, specifically:
s31, the host machine corresponds to the initial sequence according to the relation among the number of the preset range hoods, the initial sequence, the initial angle and the decreasing angle through the counted number of the range hoods in the S2;
s32, judging the relation between the starting sequence number and the initial sequence of the range hood, and adjusting the opening and closing angles of the electric valves according to the judging result.
In S32, the opening and closing angle of the electric valve is adjusted according to the judgment result, specifically:
judging whether K is smaller than A or not;
if so, adjusting the opening and closing angle of the electric valve to 90 degrees;
otherwise, the opening and closing angle is adjusted according to the following formula: b- (k-a) C;
wherein K is the number of start sequences, A is the initial sequence, B is the real angle, and C is the decreasing angle.
The relation among the number of the range hoods, the initial sequence, the initial angle and the decreasing angle is preset in the host in advance;
in this regard, in the present example, a large number of hydrodynamic simulations were performed, if the air volume per household was 720m 3 And (3) designing, and obtaining the relation among the number, the initial sequence, the initial angle and the decreasing angle of the range hood through a large number of experiments, wherein the relation is shown in the following table:
| starting-up number (desk) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Initiation sequence | 1 | 1 | 1 | 4 | 5 | 5 | 5 | 6 | 6 |
| Initial angle (°) | 90 | 90 | 90 | 82 | 75 | 79 | 81 | 74 | 77 |
| Decreasing angle (°) | 0 | 0 | 0 | 0 | 0 | 8.0 | 4.0 | 4.5 | 5.0 |
| Starting-up number (desk) | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| Initiation sequence | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 |
| Initial angle (°) | 77 | 79 | 83 | 80 | 85 | 81 | 77 | 77 | 77 |
| Decreasing angle (°) | 4.5 | 4.6 | 4.8 | 4.0 | 4.5 | 3.8 | 3.6 | 3.4 | 3.2 |
The starting number (table) in the table specifically refers to the number of the range hoods in the working state; the starting sequence specifically refers to the number of opening of a certain range hood under the starting number; the starting angle is the starting angle of the electric valve corresponding to the range hood; the decreasing angle refers to an angle correspondingly adjusted when the difference between the starting sequence number and the starting sequence is 1.
For example, in the S3, when the number of the range hoods is 6, the number of the start-up sequences of the range hoods is 3, namely: k=3:
by combining the above tables, it can be derived that: when the starting number is 6, the corresponding starting sequence A is 5, and the opening and closing angle of the electric valve is directly adjusted to 90 degrees because 3 is less than 5.
For another example, in the S3, when the number of the range hoods is 9, the number of the start-up sequences of the range hoods is 8, namely: k=8:
by combining the above tables, it can be derived that: when the start-up number is 9, the corresponding start sequence a is 6, and 8 < 6 is not true, so the opening and closing angle is adjusted according to the formula B- (k-a) x C, and the adjusted opening and closing angle should be: 77- (8-6) 5=67°.
Of course, the above table only gives a part of the parameters; for example, when the number of starts is 5, the table only shows the case where the start sequence is 5, and of course, the case where the start sequences are 1, 2, 3, and 4 is not shown in the table.
In particular embodiments:
the electric valve component in the S1 obtains the working parameters of the range hood and transmits the working parameters to the host, and the working parameters are specifically as follows:
s11, a smoke ventilator operation monitoring module collects the working state of the smoke ventilator and transmits the working state to an electric valve control module through a smoke ventilator communication module;
s12, the electric valve control module controls the electric valve to be opened or closed according to the working state;
s13, the electric valve communication module transmits the state of the electric valve to the host;
s14, the host determines the working state of the range hood and the starting sequence number of the range hood through the state of the electric valve.
The host comprises a first host communication module, a host control module and a fan which are sequentially connected, wherein the number of the range hoods, an initial sequence, an initial angle and a decreasing angle are preset in the host control module, and the host also comprises a second host communication module connected with the host control module;
the electric valve assembly comprises a smoke machine operation monitoring module, an electric valve control module, a first communication module, a second communication module, a motor module and an electric valve, wherein the smoke machine operation monitoring module, the electric valve control module, the motor module and the electric valve are sequentially connected, and the electric valve control module is also connected with the first communication module and the second communication module;
when the method is specifically implemented, a user operates the range hood (opens or closes), the electric valve obtains the use state of the range hood through the range hood operation monitoring module, and then the electric valve opens or closes itself according to the obtained use state; reporting the use state of the range hoods and the corresponding floor number to a host through a first communication module by the electric valve, acquiring the use state of each range hood and the corresponding floor through the first host communication module by the host, and adjusting the rotating speed of the fan according to the acquired information and the relation among the number, the initial sequence, the initial angle and the decreasing angle of the preset range hoods;
and then the host computer transmits communication information such as the use state, the starting sequence, the starting angle, the decreasing angle and the like of each range hood through the second host computer communication module, and if the range hood of the current floor is in the use state, the electric valve acquires the communication information transmitted by the host computer through the second communication module, and further adjusts the opening and closing angle of the valve plate according to the communication information.
And in the step S2, the target rotating speed of the host machine is adjusted, specifically: and adjusting the target rotating speed of the host machine through the frequency converter.
In addition, regarding the regulation mode of the target rotating speed of the host, the power calculation required by the host can be carried out under typical starting working conditions such as uniform starting (namely, the started range hood is distributed on different floors according to a uniformity principle) at the beginning, so that the implementation has the advantages that the power is insufficient under partial starting working conditions, but the power required by the system can be met under most conditions, and the related energy consumption can be further saved;
in addition, regarding the schemes of the initial sequence number a, the initial angle B and the decreasing angle C, the schemes of the initial sequence number a, the initial angle B and the decreasing angle C may not be changed with the number of the starts, for example, the schemes of the initial sequence number a, the initial angle B and the decreasing angle C in the case that the number of the starts is 11 are all adopted, at this time, a certain distribution effect may be obtained in other starting working conditions, but there may be a bad distribution.
Regarding the decreasing angle C, the ending angle D may be replaced by the decreasing angle D, and each valve plate is further converted into the decreasing angle according to the ending angle and the starting angle, which has the advantage that the decreasing angle is generally floating point type data containing decimal points, while the ending angle may be in integer type, and the latter is small in bytes, so that the information carried in the communication can be further reduced.
The effect of observing the air quantity regulation control method of the central flue system provided by the embodiment is provided, the fluid mechanics simulation calculation is carried out aiming at the flow distribution effect under different working conditions, and in order to increase the comparison effect, the working conditions 1-1 and 1-2 are added, wherein the working condition 1-1 is the air quantity distribution condition without an applied angle, and the working condition 1-2 is the air quantity distribution condition without a starting host and without an applied angle;
fig. 3 is a graph of air distribution under the same number of range hoods, and fig. 4 is a graph of air distribution under the same working condition, from which it can be seen that: according to the control method provided by the embodiment, the air quantity balance effect is good, and each starting floor can meet the expected design target, namely 720m of air quantity of the started floor 3 /h; and the air quantity balance performance is good, the air quantity of the high floors is obviously inhibited, and the total air quantity is obviously improved.
Example 2
The embodiment 2 of the invention provides a control system of a central flue, which is used for realizing the air quantity regulation control method of the central flue system in the embodiment 1, and as shown in fig. 5, the control system comprises a host machine 1, a public flue 2, an air pipe 3, an electric valve assembly 4 and a range hood 5, wherein the host machine 1 is positioned at the top end of the public flue 2, the range hoods 4 of different floors are communicated with the public flue 2 through the air pipe 3, and the electric valve assembly 4 is arranged on the air pipe 3 and used for regulating the air quantity;
the electric valve component 4 is used for acquiring the working parameters of the range hood and transmitting the working parameters to the host; the host machine 1 counts the number of all the range hoods in the working state and adjusts the target rotating speed; the host machine 1 is also used for adjusting the opening and closing angle of the electric valve assembly 4;
thus, with the above structure, the electric valve assembly 4 obtains the working parameters of the range hood 5 and transmits them to the host 1; the working parameters comprise the working state of the range hood 5 and the starting sequence number of the range hood 5; afterwards, the host machine 1 counts the number of all the range hoods in the working state, and adjusts the target rotating speed of the host machine according to the relation among the preset number of the range hoods, the air quantity and the air pressure; the host machine 1 works at the target rotating speed, and meanwhile, the host machine 1 adjusts the opening and closing angles of the electric valves according to the relation between the starting sequence number of the range hoods and the preset number, starting sequence, starting angle and decreasing angle of the range hoods.
In the working process of the range hood 5, the oil smoke generated by the range hood 5 is discharged into the public flue 2 through the air pipe 3, the host machine 1 positioned at the top of the public flue 2 works to extract the oil smoke in the public flue 2, and the smoke discharge is completed.
As shown in fig. 6, the host 1 includes a first host communication module 11, a host control module 12, and a fan 13 that are sequentially connected, where the number of range hoods, a start sequence, a start angle, and a decreasing angle are preset in the host control module 12, and further includes a second host communication module 14 connected to the host control module 12;
as shown in fig. 7, the electric valve assembly 4 includes a smoke machine operation monitoring module 41, an electric valve control module 42, a first communication module 43, a second communication module 44, a motor module 45, and an electric valve 46, wherein the smoke machine operation monitoring module 41, the electric valve control module 42, the motor module 45, and the electric valve 46 are sequentially connected, and the electric valve control module 42 is further connected with the first communication module 43 and the second communication module 44;
thus, the user operates the range hood (opens or closes), the electric valve 46 acquires the use state of the range hood through the hood operation monitoring module 41, and then the electric valve 46 opens or closes itself according to the acquired use state; the electric valve 46 reports the use state of the range hoods 5 and the corresponding floor number to the host 1 through the first communication module 43, the host 1 acquires the use state of each range hood 5 and the corresponding floor through the first host communication module 11, and then adjusts the rotating speed of the fan 13 according to the acquired information and the relation among the preset number of range hoods, the initial sequence, the initial angle and the decreasing angle;
then the host 1 sends out communication information such as the use state, the start sequence, the start angle, the decreasing angle and the like of each range hood through the second host communication module 14, and if the range hood of the current floor is in the use state, the electric valve 46 obtains the communication information sent by the host 1 through the second communication module 44, and then the opening and closing angle of the valve plate is adjusted according to the communication information;
the opening and closing angle of the valve plate is adjusted according to the communication information, specifically:
the motor module 45 is controlled by the electric valve control module 42 through the communication information, and the electric valve 46 is controlled by the motor module 45.
In addition, the host 1 further includes a host power supply module 15 connected to the host control module 12.
The electric valve assembly 4 further includes an electric valve power module 47 coupled to the electric valve control module 42
As shown in fig. 8, the range hood 5 includes a hood power supply module 52, a control board 51, and an internal blower 54, which are sequentially connected, and also includes a switch button 53 connected to the control board 51.
In a specific embodiment, a fire damper 6 is further arranged at the connection part of the air pipe 3 and the public flue 2.
The control system of the central flue provided by the embodiment realizes data transmission through the arrangement of each communication module and control, and introduces the concept of starting sequence number, so that the distribution of air quantity is more reasonable.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (9)
1. The air quantity regulation control method of the central flue system is characterized in that the central flue system comprises a range hood and a public flue which are positioned on each floor, a main machine is arranged at the top of the public flue, an electric valve is connected with the public flue and the range hood, and the air quantity is controlled by adjusting the opening and closing angle of the electric valve; the method comprises the following steps of:
s1, an electric valve assembly acquires working parameters of the range hood and transmits the working parameters to a host; the working parameters comprise the working state of the range hood and the starting sequence number of the range hood;
s2, counting the number of all the range hoods in the working state by the host machine, and adjusting the target rotating speed of the host machine according to the relation among the number of the range hoods, the air quantity and the air pressure, wherein the method specifically comprises the following steps: the host comprises a fan:
s21, determining the maximum rotation speed w1 of the fan and the corresponding number n1 of the operating range hoods at the rotation speed; determining the minimum rotation speed w2 of the fan and the number n2 of the range hoods in the corresponding working state under the rotation speed;
s22, judging whether n is smaller than n2 or not, and if so, adjusting the rotating speed of the fan to w2; otherwise, the process goes to S23;
s23, judging whether n is more than n1 or not, and if so, adjusting the rotating speed of the fan to w1; otherwise, S24 is entered;
s24, determining a target rotating speed of the fan through the following formula;
w＝w2+(w1-w2)/(n1-n2)*(n-n2)；
in the above formula, w is the target rotating speed of the fan, n is the number of the range hoods in the working state counted by the host;
and S3, the host machine works at the target rotating speed, and meanwhile, the host machine adjusts the opening and closing angles of the electric valves according to the relation between the starting sequence number of the range hoods and the preset number, starting sequence, starting angle and decreasing angle of the range hoods.
2. The method for controlling air volume adjustment of a central flue system according to claim 1, wherein the step S3 is characterized in that the main machine adjusts the opening and closing angles of the electric valves according to the relation between the number of start-up sequences of the range hoods and the number, start sequence, start angle and decreasing angle of the range hoods, and specifically comprises:
s31, the host machine corresponds to the initial sequence according to the relation among the number of the preset range hoods, the initial sequence, the initial angle and the decreasing angle through the counted number of the range hoods in the S2;
s32, judging the relation between the starting sequence number and the initial sequence of the range hood, and adjusting the opening and closing angles of the electric valves according to the judging result.
3. The method for controlling air volume adjustment of a central flue system according to claim 2, wherein the step S32 is to adjust the opening and closing angle of the electric valve according to the determination result, specifically:
judging whether K is smaller than A or not;
if so, adjusting the opening and closing angle of the electric valve to 90 degrees;
otherwise, the opening and closing angle is adjusted according to the following formula: b- (k-a) C;
wherein K is the number of start sequences, A is the initial sequence, B is the real angle, and C is the decreasing angle.
4. A method for controlling air volume adjustment of a central flue system according to any one of claims 1 to 3, wherein in S21, the maximum rotation speed w1 of the blower and the number n1 of operating range hoods corresponding to the rotation speed are determined, and the minimum rotation speed w2 of the blower and the number n2 of operating range hoods corresponding to the rotation speed are determined, which are all tests performed when all operating range hoods are placed on a low floor;
wherein, the low floor specifically means: the floor where the range hood furthest from the host is located.
5. The method for controlling air volume adjustment of a central flue system according to claim 1, wherein the step S1 of the electric valve assembly obtains the working parameters of the range hood and transmits the working parameters to the host, specifically:
s11, a smoke ventilator operation monitoring module collects the working state of the smoke ventilator and transmits the working state to an electric valve control module through a smoke ventilator communication module;
s12, the electric valve control module controls the electric valve to be opened or closed according to the working state;
s13, the electric valve communication module transmits the state of the electric valve to the host;
s14, the host determines the working state of the range hood and the starting sequence number of the range hood through the state of the electric valve.
6. The method for controlling air volume adjustment of a central flue system according to claim 1, wherein the step S2 of adjusting the target rotational speed of the main unit is specifically: and adjusting the target rotating speed of the host machine through the frequency converter.
7. The control system of the central flue is characterized by comprising a host machine (1), a public flue (2), an air pipe (3), an electric valve assembly (4) and a range hood (5), wherein the host machine (1) is positioned at the top end of the public flue (2), the range hoods (5) of different floors are communicated with the public flue (2) through the air pipe (3), and the electric valve assembly (4) is arranged on the air pipe (3) and is used for adjusting the air quantity;
the electric valve component (4) is used for acquiring the working parameters of the range hood and transmitting the working parameters to the host; the host machine (1) counts the number of all the range hoods in the working state and adjusts the target rotating speed of the range hoods; the main machine (1) is also used for adjusting the opening and closing angles of the electric valve assembly (4).
8. The control system of a central flue according to claim 7, wherein the host (1) comprises a first host communication module (11), a host control module (12) and a fan (13) which are sequentially connected, the relationship among the number of the range hoods, the starting sequence, the starting angle and the decreasing angle is preset in the host control module (12), and the control system further comprises a second host communication module (14) connected with the host control module (12).
9. The control system of a central flue according to claim 8, wherein the electric valve assembly (4) comprises a smoke machine operation monitoring module (41), an electric valve control module (42), a first communication module (43), a second communication module (44), a motor module (45) and an electric valve (46), the smoke machine operation monitoring module (41), the electric valve control module (42), the motor module (45) and the electric valve (46) are sequentially connected, and the electric valve control module (42) is further connected with the first communication module (43) and the second communication module (44).
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| CN113587161B (en) * | 2021-06-25 | 2022-12-06 | 华帝股份有限公司 | Communication method of central flue system and central flue system adopting same |
| CN114623481A (en) * | 2022-04-12 | 2022-06-14 | 杭州老板电器股份有限公司 | Central range hood system and control method and control device thereof |
| CN115229218B (en) * | 2022-07-21 | 2023-11-10 | 湖南华曙高科技股份有限公司 | Wind field intelligent control method and device, wind field equipment and readable storage medium |
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