CN114562754A - Central range hood system and control method thereof - Google Patents

Central range hood system and control method thereof Download PDF

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Publication number
CN114562754A
CN114562754A CN202210291965.5A CN202210291965A CN114562754A CN 114562754 A CN114562754 A CN 114562754A CN 202210291965 A CN202210291965 A CN 202210291965A CN 114562754 A CN114562754 A CN 114562754A
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China
Prior art keywords
power distribution
distribution valve
opening degree
floor
target
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CN202210291965.5A
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Chinese (zh)
Inventor
任富佳
李富强
李明
陈晓伟
常莹
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Hangzhou Robam Appliances Co Ltd
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Hangzhou Robam Appliances Co Ltd
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Priority to CN202210291965.5A priority Critical patent/CN114562754A/en
Publication of CN114562754A publication Critical patent/CN114562754A/en
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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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)

Abstract

The invention discloses a central range hood system and a control method thereof. The central range hood system comprises a public flue, an exhaust host, a first power distribution valve and a terminal, wherein the first power distribution valve and the terminal are located on each floor of the building, the building comprises a high-floor set and a low-floor set, the high-floor set comprises at least one floor, the low-floor set comprises at least one floor, each floor in the high-floor set is provided with a second power distribution valve, and the second power distribution valves are used for providing exhaust resistance for the terminal. According to the central range hood system and the control method thereof provided by the embodiment of the invention, the second power distribution valve is arranged at the inlet of the exhaust pipeline of each floor in the high-rise building group, so that extra exhaust resistance is provided for the terminal machine of each floor in the high-rise building group, the resistance required by the first power distribution valve when the starting terminal machine of each floor in the high-rise building group reaches the target exhaust volume is reduced, the opening degree of the first power distribution valve is increased, the howling noise is reduced, and the user experience is improved.

Description

Central range hood system and control method thereof
Technical Field
The invention relates to the technical field of central range hoods, in particular to a central range hood system and a control method thereof.
Background
In the central range hood system, resistance adjustment is carried out on each floor by adopting a power distribution valve so as to reduce the air exhaust resistance of the terminal machine positioned at the low floor position and properly increase the air exhaust resistance of the terminal machine positioned at the high floor position, thereby realizing the relative balance of the air exhaust amount of the terminal machines at different floors. The opening degree of the power distribution valve is gradually reduced from a low floor to a high floor, and when the opening rate of the terminal reaches a certain value, the opening degree of the power distribution valve at the high floor is too small, so that loud squeaking noise is generated, and user experience is influenced.
Disclosure of Invention
The invention provides a central range hood system and a control method thereof, which solve the problem of squeaking noise while ensuring the relative balance of the air exhaust volume of terminals on different floors.
According to one aspect of the invention, a central range hood system is provided, which comprises a common flue, an exhaust main machine, first power distribution valves and terminal machines, wherein the first power distribution valves and the terminal machines are positioned on each floor of a building;
the air exhaust main machine is positioned at the outlet of the public flue;
the terminal is connected with the public flue through an exhaust pipeline;
the first power distribution valve is arranged at the outlet of the exhaust pipeline;
the building comprises a high floor group and a low floor group, wherein the high floor group comprises at least one floor, the low floor group comprises at least one floor, and the height of any floor in the high floor group is higher than that of any floor in the low floor group;
and each floor in the high-rise floor group is provided with a second power distribution valve, the second power distribution valve is positioned at the inlet of the exhaust pipeline, and the second power distribution valve is used for providing exhaust resistance for the terminal machine.
Optionally, the opening degree of the first power distribution valve is greater than or equal to a first preset squeal opening degree;
the opening degree of the second power distribution valve is greater than or equal to a second preset squeal opening degree;
the first preset squeal opening degree is an opening degree of the first power distribution valve when squeal occurs, and the second preset squeal opening degree is an opening degree of the second power distribution valve when squeal occurs.
Optionally, the number of floors in the high-floor group is a, the number of floors in the low-floor group is B, wherein a/B is greater than 0 and less than or equal to 20%.
According to another aspect of the present invention, there is provided a control method for a central range hood system, which is applied to any one of the central range hood systems of the first aspect;
the control method comprises the following steps:
s1, obtaining current working condition information, wherein the working condition information comprises the number of the starting-up terminal machines;
s2, determining the maximum air exhaust resistance value of the starting terminal machine according to the current working condition information;
s3, determining the target opening degree of the first power distribution valve of each floor in the low floor group according to the maximum exhaust resistance value, and determining the target opening degree of the first power distribution valve and the target opening degree of the second power distribution valve of each floor in the high floor group;
and S4, controlling the first power distribution valve and the second power distribution valve to execute the target opening degrees.
Optionally, determining a target opening degree of the first power distribution valve and a target opening degree of the second power distribution valve of each floor in the high-rise building group according to the maximum air discharge resistance value includes:
and when the maximum air exhaust resistance value is less than or equal to 0, determining that the target opening degree of the first power distribution valve of the floor where the starting terminal machine is located is 90 degrees, and determining that the target opening degree of the second power distribution valve of the floor where the starting terminal machine is located is 90 degrees.
Optionally, determining a target opening degree of the first power distribution valve and a target opening degree of the second power distribution valve of each floor in the high-rise building group according to the maximum air discharge resistance value includes:
when the maximum air exhaust resistance value is larger than 0, determining target resistance coefficients of the first power distribution valve and the second power distribution valve of the floor where each starting terminal is located according to the maximum air exhaust resistance value;
when the target resistance coefficient is smaller than or equal to the resistance coefficient of the first power distribution valve under the preset squealing opening degree, determining the target opening degree of the first power distribution valve according to the target resistance coefficient, wherein the target opening degree of the second power distribution valve on the floor where the starting terminal is located is 90 degrees;
when the target resistance coefficient is larger than the resistance coefficient of the first power distribution valve under the preset squeal opening degree, determining the target opening degree of the first power distribution valve of the floor where the starting terminal is located as the first preset squeal opening degree, and determining the target opening degree of the second power distribution valve according to the target resistance coefficient.
Optionally, determining the target opening degree of the second power distribution valve according to the target resistance coefficient includes:
determining a difference value between the target resistance coefficient and a resistance coefficient of the first power distribution valve at a preset squeal opening degree as a resistance coefficient difference value;
and determining the target opening degree of the second power distribution valve according to the resistance coefficient difference value.
Optionally, determining the target opening degree of the second power distribution valve according to the resistance coefficient difference includes:
when the resistance coefficient difference is larger than the resistance coefficient of the second power distribution valve at a second preset squeal opening degree;
and determining the target opening degree of the second power distribution valve as a second preset squeal opening degree.
Optionally, the operating condition information further includes a gear of the terminal;
determining a target opening degree of the second power distribution valve according to the resistance coefficient difference, further comprising:
and when the resistance coefficient difference is larger than the resistance coefficient of the second power distribution valve at the second preset squeal opening degree, increasing the gear of the starting terminal, and repeating the steps S2 and S3.
Optionally, the operating condition information further includes a target air discharge amount of the terminal;
determining a target opening degree of the second power distribution valve according to the resistance coefficient difference, further comprising:
and when the resistance coefficient difference is larger than the resistance coefficient of the second power distribution valve at the second preset squeal opening degree, reducing the target air discharge amount of the starting terminal, and repeating the steps S2 and S3.
The central range hood system and the control method thereof provided by the embodiment of the invention adjust the resistance through the first power distribution valve of each floor, properly increase the air exhaust resistance of the starting terminal machine positioned at the high floor, enable the air exhaust resistance of each floor to be equivalent, and further realize the relative balance of the air exhaust amount of the starting terminal machines of different floors. Meanwhile, the second power distribution valve is arranged at the inlet of the exhaust pipeline of each floor in the high-rise floor group, so that extra exhaust resistance is provided for the terminal machine of each floor in the high-rise floor group, the resistance required by the first power distribution valve when the starting terminal machine of each floor in the high-rise floor group reaches the target exhaust volume is reduced, the opening degree of the first power distribution valve is increased, the squeaking noise is reduced, and the user experience is improved.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a central extractor hood system according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a control method of a central range hood system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a power performance curve of a terminal according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating an opening-resistance characteristic relationship of a power distribution valve according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a power performance curve of an exhaust main machine according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a control method of a central extractor hood system according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of a central extractor hood system according to an embodiment of the present invention, and as shown in fig. 1, the central extractor hood system according to the embodiment of the present invention includes a common flue 10, an exhaust main machine 11, first power distribution valves 12 located at each floor of a building 20, and a terminal 13. The exhaust main machine 11 is located at the outlet of the public flue 10, the terminal 13 is connected with the public flue 10 through an exhaust duct 14, and the first power distribution valve 12 is arranged at the outlet of the exhaust duct 14. Building 20 includes high-rise group 21 and low-rise group 22, and high-rise group 21 includes at least one floor, and low-rise group 22 includes at least one floor, and the height of arbitrary floor in high-rise group 21 is higher than the height of arbitrary floor in low-rise group 22. Each floor in the high-rise group 21 is provided with a second power distribution valve 15, the second power distribution valve is positioned at the inlet of the exhaust duct 14, and the second power distribution valve 15 is used for providing exhaust resistance for the terminal 13.
Specifically, as shown in fig. 1, the central extractor hood system includes a common flue 10, and a first power distribution valve 12 and a terminal 13 located at each floor, where the terminal 13 at each floor is connected to the common flue 10 through the first power distribution valve 12.
Illustratively, as shown in FIG. 1, a top floor FNTerminal 13 through the top tower FNIs connected to the common flue 10, floor FN-1Terminal 13 through floor FN-1Is connected to a common flue 10, … …, floor 1F1Terminal 13 through first floor F1Is connected to the common tunnel 10.
The terminal 13 is an exhaust device such as a range hood or an integrated kitchen with a built-in exhaust motor, and the terminal 13 can be installed in a kitchen of each floor.
A first power distribution valve 12 is installed at an interface between an outlet of an exhaust duct 14 of the terminal 13 and an inlet of the common flue 10, and the first power distribution valve 12 is a device for adjusting an exhaust amount of the terminal 13. The first power distribution valve 12 can be composed of a valve plate angle control module and a communication module, the valve plate angle control module can realize the opening and closing of the valve plate by controlling the rotation of a motor, and can control the opening angle of the valve plate; the communication module can realize the wireless communication function.
With continued reference to fig. 1, the main exhaust unit 11 may be installed on the roof of the building 20 and located at the air outlet of the common flue 10, and the main exhaust unit 11 includes a power fan device therein, which may perform an auxiliary smoke exhaust function on the oil smoke in the common flue 10.
Since the common flue 10 has a pressure distribution characteristic that the back pressure at the bottom is large and the back pressure at the top is small, the air discharge resistance that the terminal 13 at the low floor needs to overcome when reaching the target air discharge capacity is usually larger than the air discharge resistance that the terminal 13 at the high floor needs to overcome when reaching the target air discharge capacity, and therefore, when the target air discharge capacity at the low floor is satisfied, the actual air discharge capacity at the high floor is larger than the target air discharge capacity.
In order to solve the above problems, the opening degree of the first power distribution valve 12 corresponding to the start-up terminal machine of each floor is adjusted, so that the resistance adjustment is performed through the first power distribution valve 12 of each floor, and the exhaust air volume adjustment of the start-up terminal machine of each floor is realized, wherein the opening degrees of the first power distribution valves 12 of different floors are different, the opening degree of the first power distribution valve 12 of a high floor is smaller, the opening degree of the first power distribution valve 12 of a low floor is larger, so that the exhaust air resistance of the start-up terminal machine located at the high floor is properly increased, and the exhaust air resistance of each floor is equivalent, thereby realizing the relative balance of the exhaust air volumes of the start-up terminal machines of different floors.
The starting terminal is a terminal 13 in an open state, the opening degree is an opening angle of the power distribution valve, the smaller the opening degree of the power distribution valve is, the larger the resistance coefficient is, and the larger the exhaust resistance can be provided.
However, the inventor has found that the opening degree of the first power distribution valve 12 tends to decrease gradually from the low floor to the high floor, and when the opening rate of the terminal 13 reaches a certain value, the opening degree of the first power distribution valve 12 at the high floor is too small, thereby generating a loud squeaking noise and affecting the user experience.
In this embodiment, with continued reference to fig. 1, building 20 includes a high-rise group 21 and a low-rise group 22, high-rise group 21 including at least one floor, low-rise group 22 including at least one floor, and any floor in high-rise group 21 having a height greater than any floor in low-rise group 22. The second power distribution valve 15 is arranged at the air inlet of the exhaust pipeline 14 of each floor in the high-rise building group 21, so that additional exhaust resistance can be provided for the terminal 13 of each floor in the high-rise building group 21, the resistance required by the first power distribution valve 12 when the starting terminal of each floor in the high-rise building group 21 reaches the target exhaust air volume is reduced, the opening degree of the first power distribution valve 12 is increased, the squeal noise is reduced, and the user experience is improved.
The second power distribution valve 15 may be located at any position between the first power distribution valve 12 and the terminal 13, and the specific structure of the second power distribution valve 15 may be set according to actual requirements.
In addition, the second power distribution valve 15 may include a valve sheet angle control module, which may control the rotation of the motor to open and close the valve sheet and control the opening angle of the valve sheet.
The second power distribution valve 15 may be in communication connection with the first power distribution valve 12, so that the valve plate opening angle of the second power distribution valve 15 may be controlled by the first power distribution valve 12, but is not limited thereto, and the specific structure of the second power distribution valve 15 may be set according to actual requirements as long as the air exhaust resistance in the air exhaust duct 14 can be adjusted, which is not specifically limited in this embodiment of the present invention.
In summary, the central range hood system provided in the embodiment of the present invention includes a common flue 10, an exhaust main machine 11, and power distribution valves 12 and terminals 13 located at each floor of a building 20, and the first power distribution valve 12 is disposed at the outlet of the exhaust duct 14 of the terminal 13, so as to adjust the resistance through the first power distribution valve 12 of each floor, and appropriately increase the exhaust resistance of the start-up terminal located at a high floor, so that the exhaust resistance of each floor is equivalent, thereby achieving the relative balance of the exhaust air volume of the start-up terminals of different floors. Meanwhile, the second power distribution valve 15 is arranged at the inlet of the exhaust duct 14 of each floor in the high-rise group 21, so that additional exhaust resistance is provided for the terminal 13 of each floor in the high-rise group 21, the resistance required by the first power distribution valve 12 when the starting terminal of each floor in the high-rise group 21 reaches the target exhaust air volume is reduced, the opening degree of the first power distribution valve 12 is increased, the squeal noise is reduced, and the user experience is improved.
Optionally, the opening degree of the first power distribution valve 12 is greater than or equal to a first preset whistle opening degree, and the opening degree of the second power distribution valve 15 is greater than or equal to a second preset whistle opening degree, where the first preset whistle opening degree is an opening degree of the first power distribution valve 12 when the whistle occurs, and the second preset whistle opening degree is an opening degree of the second power distribution valve 15 when the whistle occurs.
It can be understood that the smaller the opening degree of the power distribution valve is, the larger the resistance coefficient that can be provided is, when the opening degree of the power distribution valve is smaller than a certain critical value, the squeal may occur under the set exhaust amount, the critical value may be set to a preset squeal opening degree, when the opening degree of the power distribution valve is greater than or equal to the preset squeal opening degree, the squeal may not occur, and when the opening degree of the power distribution valve is smaller than the preset squeal opening degree, the squeal may occur.
In the present embodiment, by ensuring that the opening degree of the first power distribution valve 12 is not lower than the first preset squeal opening degree at the minimum and the opening degree of the second power distribution valve 15 is not lower than the second preset squeal opening degree at the minimum, the problem of the squeal caused by the excessively small opening degrees of the first power distribution valve 12 and the second power distribution valve 15 is avoided.
The first preset howling opening degree and the second preset howling opening degree can be set to be 45 degrees, but the invention is not limited to this, and the first preset howling opening degree and the second preset howling opening degree can be the same or different, and specific values can be measured through experiments, which is not limited in the embodiment of the invention.
Optionally, the number of floors in the high-floor group 21 is a, the number of floors in the low-floor group 22 is B, wherein a/B is greater than 0 and less than or equal to 20%.
However, if the second power distribution valve 15 is not provided, the opening degree of the first power distribution valve 12 tends to decrease gradually from the low floor to the high floor, and therefore the higher the floor is, the higher the possibility that the first power distribution valve 12 generates the howling noise is.
In this embodiment, by setting the number of floors a in the high-floor group 21 and the number of floors B in the low-floor group 22 to satisfy 0 < a/B < 20%, the number of floors in the high-floor group 21 is at least one, that is, at least the second power distribution valve 15 is arranged in the exhaust duct 14 of the top floor, so as to reduce the resistance required by the first power distribution valve 12 when the start-up terminal of the top floor reaches the target exhaust air volume, increase the opening degree of the first power distribution valve 12 of the top floor, further reduce the squealing noise of the top floor, and improve the user experience.
Meanwhile, because the opening degree of the first power distribution valve 12 of the lower floor is large, there is no possibility of generating squeal noise, therefore, the floors in the high floor group 21 can be set to be at most 20% of the total number of floors, that is, the second power distribution valve 15 is installed only on the upper floor of 20% of the total height of the floors, and the floors in the bottom low floor group 22 do not need to be installed with the second power distribution valve 15, for example, if the total height of the floors is 30 floors and the floor occupancy of 20% is 6 floors, the second power distribution valve 15 can be installed on 25 to 30 floors, and other floors are not installed, so that the second power distribution valve 15 is prevented from increasing the exhaust resistance of the floors in the low floor group 22, and further the exhaust volume of the terminal in the low floor group 22 is prevented from being reduced.
It should be noted that the relation of the ratio between the number a of floors in the high-rise group 21 and the number B of floors in the low-rise group 22 is not limited to the above-described embodiment, that is, the number of floors on which the second power distribution valve 15 is installed is not limited to the upper floors within 20% of the total floor height, and those skilled in the art can set the number of floors on which the second power distribution valve 15 is installed according to actual circumstances, which is not limited in the embodiment of the present invention.
Based on the same inventive concept, the embodiment of the present invention further provides a control method of a central range hood system, the control method is applied to the central range hood system provided in any of the embodiments, and the explanations of the structures and terms that are the same as or corresponding to the embodiments are not repeated herein.
The control method can be executed by a control device in the central extractor hood system, the control device can be implemented in the form of hardware and/or software, and for example, the control device can be configured in the exhaust main machine 11 of the central extractor hood system.
For example, the exhaust main machine 11 may further include a fan variable frequency control unit and a controller, where the fan variable frequency control unit is used to adjust the frequency of the power fan device; the control device can be integrated in the controller, and the terminal, the first power distribution valve 12 and the exhaust main machine 11 can communicate in a wired or wireless mode.
Fig. 2 is a schematic flow chart of a control method of a central extractor hood system according to an embodiment of the present invention, and as shown in fig. 2, the control method of the central extractor hood system according to the present invention includes:
and S1, acquiring current working condition information, wherein the working condition information comprises the number of the starting terminal machines.
The working condition information refers to working state information, the working condition information includes the number of the starting-up terminal machines, and the starting-up terminal machines refer to the terminal machines in the starting-up state.
In this embodiment, the exhaust main machine may obtain the operating condition information sent by the first power distribution valve of each floor, and calculate the number of the terminal machines in the open state according to the operating condition information of each floor.
Specifically, as shown in fig. 1, the first power distribution valves 12 installed in the kitchens of the same common flue 10 may be numbered from floor 1F1The numbers are sequentially numbered 1-1 till the top floor FNNumber N-1. The second power distribution valves 15 of the respective floors in the high-rise group 21 are numbered, and for example, if the first power distribution valve 12 and the second power distribution valve 15 are installed at the ith floor at the same time, the first power distribution valve 1 of the ith floor is numbered i-1 and the second power distribution valve 15 is numbered i-2.
Meanwhile, the exhaust main machine 11 and the first power distribution valves 12 of each floor can be networked to realize real-time communication between the exhaust main machine 11 and the first power distribution valves 12 of each floor, so that the exhaust main machine 11 obtains the on-off signals of each terminal 13.
Specifically, the first power distribution valves 12 of each floor detect the startup and shutdown signals of the terminal machines 13 in real time, when the startup signals of the terminal machines 13 are detected, the startup signals are broadcasted to the networking system by the first power distribution valves 12, so that the exhaust hosts 11 in the networking system obtain the startup signals, and the controller in the exhaust hosts 11 can calculate the number of the startup terminal machines according to the startup signals sent by the power distribution valves 12 of each floor.
And S2, determining the maximum air exhaust resistance value of the terminal machine according to the current working condition information.
Specifically, the maximum air discharge resistance value delta P of the starting terminal machines of each floor when the target air discharge amount is reached can be calculated according to the number m of the starting terminal machinesmaxWherein the maximum air discharge resistance value delta PmaxThe maximum air exhaust resistance is required to be overcome when the starting terminal machine of each floor reaches the target air exhaust amount.
Optionally, the air exhaust resistance value delta P of each starting terminal machine can be calculated according to the number m of the starting terminal machinesiDetermining the maximum air exhaust resistance value delta P corresponding to the starting terminal with the maximum air exhaust resistance valuemaxBut is not limited thereto.
In other embodiments, since the common flue 10 has a pressure distribution characteristic that the back pressure at the bottom is large and the back pressure at the top is small, in general, the air discharge resistance that the low-floor terminal needs to overcome when reaching the target air discharge capacity is larger than the air discharge resistance that the high-floor terminal needs to overcome when reaching the target air discharge capacity, and therefore, the air discharge resistance value of the terminal located at the bottommost floor can also be directly set to the maximum air discharge resistance value Δ PmaxThereby contributing to a reduction in the amount of calculation.
Furthermore, the air exhaust resistance value delta P of each starting terminal machineiAnd also with the target exhaust volume Q of the starting-up terminal machineZThe power performance curve f (P, Q) of the terminal, the total floor number N, the floor height h, the roughness k of the common flue and the section area S of the common flue are related, so that the calculation can be more accurate according to the embodimentStarting number m of the set terminal machine and target exhaust air quantity Q of the set terminal machineZThe total floor number N, the floor height h, the roughness k of the public flue, the power performance curve f (P, Q) of the terminal and the section area S of the public flue are calculated, and the starting terminal of each floor is calculated when the target exhaust air volume Q is reachedZHourly exhaust resistance value delta Pi＝f(f(Qz)，S，QZN, k, m, h) and determining the maximum air discharge resistance value Δ PiIs the maximum air exhaust resistance value delta Pmax。
In an exemplary embodiment, fig. 3 is a schematic diagram of a power performance curve of a terminal according to an embodiment of the present invention, as shown in fig. 3, an abscissa Q represents an air volume, and an ordinate P represents an air pressure, and the terminal can correspond to different power performance curves in different gears (e.g., a low gear X1, a medium gear X2, and a high gear X3).
And S3, determining the target opening degree of the first power distribution valve of each floor in the low floor group according to the maximum air discharge resistance value, and determining the target opening degree of the first power distribution valve and the target opening degree of the second power distribution valve of each floor in the high floor group.
As described above, since the air discharge resistance of the high floor is smaller than the air discharge resistance of the low floor, when the target air discharge amount of the low floor is satisfied, the air discharge amount of the high floor is larger than the target air discharge amount, in this embodiment, the target opening of the first power distribution valve of each floor in the low floor group is determined according to the maximum air discharge resistance value, and the target opening of the first power distribution valve and the target opening of the second power distribution valve of each floor in the high floor group are determined, so that resistance adjustment is performed through the power distribution valves of each floor, thereby realizing air discharge amount adjustment of the start-up terminal of each floor.
The second power distribution valve is arranged at the air inlet of the exhaust pipeline of each floor in the high-rise building group, so that extra exhaust resistance can be provided for the terminal machine of each floor in the high-rise building group, the target opening degree of the first power distribution valve and the target opening degree of the second power distribution valve of each floor in the high-rise building group are determined according to the maximum exhaust resistance value, the exhaust resistance required to be provided is shared by the first power distribution valve and the second power distribution valve, the resistance required to be provided by the first power distribution valve when the start terminal machine of each floor in the high-rise building group reaches the target exhaust amount is reduced, the opening degree of the first power distribution valve is increased, the squeal noise is reduced, and the user experience is improved.
And S4, controlling the first power distribution valve and the second power distribution valve to execute the target opening degrees.
The target opening of the first power distribution valve and the target opening of the second power distribution valve are controlled, so that the power distribution valves of all floors provide proper resistance coefficients, the air exhaust resistance of the terminal at the high floor position is increased, the air exhaust resistance value of each floor approaches to the maximum air exhaust resistance value, and the relative balance of the air exhaust amount of the starting terminal of different floors is realized.
Optionally, determining a target opening degree of the first power distribution valve and a target opening degree of the second power distribution valve of each floor in the high-rise building group according to the maximum air discharge resistance value, includes:
and when the maximum air exhaust resistance value is less than or equal to 0, determining that the target opening degree of the first power distribution valve of the floor where the starting terminal machine is located is 90 degrees, and determining that the target opening degree of the second power distribution valve of the floor where the starting terminal machine is located is 90 degrees.
When the maximum air exhaust resistance value is less than or equal to 0, the starting terminal machine of each floor does not need to overcome the air exhaust resistance when reaching the target air exhaust volume, at the moment, the target opening degree of the first power distribution valve of the floor where the starting terminal machine is located is determined to be 90 degrees, the target opening degree of the second power distribution valve of the floor where the starting terminal machine is located is determined to be 90 degrees, so that the first power distribution valve and the second power distribution valve are completely opened, the situation that the first power distribution valve and the second power distribution valve provide resistance coefficients to reduce the air exhaust volume is avoided, and the reduction of power consumption is facilitated.
Optionally, determining a target opening degree of the first power distribution valve of each floor in the low-floor group according to the maximum air discharge resistance value includes:
and when the maximum air exhaust resistance value is larger than 0, determining the target resistance coefficient of the first power distribution valve of the floor where each starting terminal is located according to the maximum air exhaust resistance value.
And when the target resistance coefficient is less than or equal to the resistance coefficient of the first power distribution valve at the preset squeal opening degree, determining the target opening degree of the first power distribution valve according to the target resistance coefficient.
Wherein, when the maximum air exhaust resistance value is delta PmaxWhen the air exhaust amount of the starting terminal machine of each floor reaches a target air exhaust amount, the required overcome air exhaust resistance is a positive value, the air exhaust resistance required to be overcome by the low floor is larger than the air exhaust resistance required to be overcome by the high floor, at the moment, the target resistance coefficient of the first power distribution valve of each floor in the low floor group is determined according to the maximum air exhaust resistance value, so that the first power distribution valve of the higher floor in the low floor group provides a certain resistance coefficient, the air exhaust resistance of the higher floor in the low floor group is increased, the air exhaust resistance value of the higher floor in the low floor group approaches to the maximum air exhaust resistance value, and the relative balance of the air exhaust amounts of the starting terminal machines of different floors in the low floor group is realized.
Further, when the calculated target resistance coefficient is smaller than or equal to the resistance coefficient of the first power distribution valve at the first preset squeal opening, it is described that the resistance coefficient required to be provided by the first power distribution valve of the floor is smaller than the resistance coefficient of the first power distribution valve at the preset squeal opening, that is, the opening of the first power distribution valve of the floor when reaching the target resistance coefficient is larger than the first preset squeal opening, at this time, the target opening of the first power distribution valve can be directly determined according to the target resistance coefficient, the obtained target opening is larger than the first preset squeal opening, and the first power distribution valve does not generate squeal.
Optionally, the determining a target resistance coefficient of the first power distribution valve of the floor where each starting terminal is located according to the maximum exhaust resistance value includes:
and respectively determining the difference value between the maximum air exhaust resistance value and the air exhaust resistance value of each starting terminal machine as a resistance difference value.
And determining a target resistance coefficient of a first power distribution valve of the floor where the starting terminal is located according to the resistance difference.
Specifically, the maximum air discharge resistance value delta P can be calculated for each starting terminal in the low-floor groupmaxAnd air discharge resistance value delta PiDifference Δ P therebetweenmax-ΔPiAs a difference in resistance Δ PixThen according to the difference value delta P of the resistanceixCalculating the target exhaust air quantity Q of the first power distribution valvezTarget resistance coefficient xi of lower adjustment requirementix＝ΔPix/(Qz*Qz) So as to obtain the target resistance coefficient xi of the first power distribution valve of the floor where the starting terminal machine is positionedix。
Further, the opening degree-resistance characteristic relation f (ξ) of the power distribution valve may be relied uponixθ) calculates a target opening θ of the first power distribution valvei-1For example, fig. 4 is a schematic diagram of an opening-resistance characteristic relationship of a power distribution valve according to an embodiment of the present invention, as shown in fig. 4, an abscissa θ represents an opening, an ordinate ξ represents a resistance coefficient, the smaller the opening of the power distribution valve, the larger the resistance coefficient that can be provided, the maximum opening of the power distribution valve may be 90 °, at which time, the resistance coefficient provided by the power distribution valve is the smallest, and the opening-resistance characteristic relationship f (ξ) is based on the opening-resistance characteristic relationshipixθ), the opening degree corresponding to the first power distribution valve may be found from the resistance coefficient as the target opening degree θi。
Further, the target opening degree of the first power distribution valve, whose target resistance coefficient is larger than the resistance coefficient of the first power distribution valve at the preset squeal opening degree, may be set to the first preset squeal opening degree to ensure that the first power distribution valve does not generate squeal due to an excessively small opening degree.
Optionally, determining a target opening degree of the first power distribution valve and a target opening degree of the second power distribution valve of each floor in the high-rise building group according to the maximum air discharge resistance value, includes:
and when the maximum air exhaust resistance value is larger than 0, determining the target resistance coefficients of the first power distribution valve and the second power distribution valve of the floor where each starting terminal is located according to the maximum air exhaust resistance value.
When the target resistance coefficient is smaller than or equal to the resistance coefficient of the first power distribution valve under the preset squealing opening degree, the target opening degree of the first power distribution valve is determined according to the target resistance coefficient, and the target opening degree of the second power distribution valve of the floor where the starting terminal is located is 90 degrees.
When the target resistance coefficient is larger than the resistance coefficient of the first power distribution valve under the preset squeal opening degree, determining the target opening degree of the first power distribution valve of the floor where the starting terminal is located as the first preset squeal opening degree, and determining the target opening degree of the second power distribution valve according to the target resistance coefficient.
Wherein, when the maximum air exhaust resistance value is delta PmaxWhen the air discharge quantity of the start-up terminal machine of each floor reaches a target air discharge quantity, the required overcome air discharge resistance is a positive value, the air discharge resistance required to be overcome by the low floor is larger than the air discharge resistance required to be overcome by the high floor, at the moment, the target resistance coefficient required to be provided by the first power distribution valve and the second power distribution valve of each floor in the high floor group is determined according to the maximum air discharge resistance value, so that the first power distribution valve and the second power distribution valve of the higher floor in the high floor group provide certain resistance coefficient, the air discharge resistance of the higher floor in the high floor group is increased, the resistant air discharge value of the higher floor in the high floor group approaches to the maximum air discharge resistance value, and the relative balance of the air discharge quantity of the start-up terminal machine of different floors in the high floor group is realized.
Further, when the calculated target resistance coefficient is smaller than or equal to the resistance coefficient of the first power distribution valve at the first preset squeal opening, it is described that the resistance coefficient required to be provided by the first power distribution valve of the floor is smaller than the resistance coefficient of the first power distribution valve at the preset squeal opening, that is, the opening of the first power distribution valve of the floor when reaching the target resistance coefficient is larger than the first preset squeal opening, at this time, the target opening of the first power distribution valve can be directly determined according to the target resistance coefficient, the obtained target opening is larger than the first preset squeal opening, and the first power distribution valve does not generate squeal. Meanwhile, the target opening degree of the second power distribution valve of the floor where the starting terminal is located is 90 degrees, so that the second power distribution valve is completely opened, the second power distribution valve is prevented from providing a resistance coefficient to reduce the air exhaust amount, and the reduction of power consumption is facilitated.
Wherein, the opening degree-resistance characteristic relation f (xi) of the power distribution valve can be usedixθ) calculates a target opening θ of the first power distribution valvei-1And will not be described herein.
Further, when the target resistance coefficient is larger than the resistance coefficient of the first power distribution valve under the preset squeal opening degree, the target opening degree of the first power distribution valve of the floor where the starting terminal is located is determined to be the first preset squeal opening degree, so that the first power distribution valve is ensured not to generate squeal due to the fact that the opening degree is too small. Meanwhile, the target opening degree of the second power distribution valve is determined according to the target resistance coefficient, so that the target resistance coefficient required to be provided is complemented through the second power distribution valve, and the relative balance of the air discharge amount of the starting terminal machines of different floors in a high-rise building group is realized.
Optionally, determining the target opening degree of the second power distribution valve according to the target resistance coefficient includes:
and determining the difference between the target resistance coefficient and the resistance coefficient of the first power distribution valve at the preset squeal opening degree as a resistance coefficient difference.
And determining the target opening degree of the second power distribution valve according to the resistance coefficient difference value.
Wherein, the difference between the target resistance coefficient and the resistance coefficient of the first power distribution valve under the preset squeal opening is calculated as a resistance coefficient difference, the resistance coefficient difference is the resistance coefficient required to be provided by the second power distribution valve, and the difference can be obtained according to the opening-resistance characteristic relation f (xi) of the power distribution valvesixθ), the target opening θ of the second power distribution valve is calculated from the difference in the resistance coefficienti-2And the target resistance coefficient required to be provided is complemented through the second power distribution valve, so that the relative balance of the air discharge quantity of the starting terminal machines of different floors in the high-rise building group is realized.
Optionally, determining the target opening degree of the second power distribution valve according to the resistance coefficient difference includes:
and when the resistance coefficient difference is larger than the resistance coefficient of the second power distribution valve at the second preset squeal opening degree.
And determining the target opening degree of the second power distribution valve as a second preset squeal opening degree.
The target opening degree of the second power distribution valve, in which the difference in the resistance coefficient is greater than the resistance coefficient of the second power distribution valve at the second preset squeal opening degree, may be set to the second preset squeal opening degree, so that the second power distribution valve does not generate squeal.
The squeal problem caused by the fact that the opening degree of the second power distribution valve is too small is avoided by ensuring that the target opening degree of the second power distribution valve is not lower than a second preset squeal opening degree at the minimum.
Optionally, the operating condition information further includes a gear of the terminal.
Determining a target opening degree of the second power distribution valve according to the resistance coefficient difference value, further comprising:
and when the resistance coefficient difference is larger than the resistance coefficient of the second power distribution valve at the second preset squeal opening degree, increasing the gear of the starting terminal, and repeating the steps S2 and S3.
Wherein, central range hood system can predetermine a plurality of gears to the terminating machine.
Optionally, the terminal machine is provided with a built-in exhaust motor, and the terminal machine can have three gears of low, medium and high, and the corresponding gears are respectively a low gear of X1, a medium gear of X2 and a high gear of X3. Wherein, the higher the gear of terminal machine, the higher its frequency of built-in air exhaust motor is, the bigger the wind pressure that provides.
The initial default gear of the terminal can be an X1 low gear, and the power consumption of the terminal can be reduced by setting the initial default gear to a preset minimum gear X1 low gear.
It should be noted that, in the above embodiment, only 3 preset gears of the terminal are taken as an example, but not limited to this, and a person skilled in the art may set the number of the preset gears according to actual requirements, and in general, the terminal may include 3 to 4 gears.
Further, when the drag coefficient is differentWhen the difference value of the resistance coefficient is larger than that of the second power distribution valve under the second preset squeal opening degree, the target opening degree is smaller than the second preset squeal opening degree to generate squeal, at the moment, the gear of the starting terminal can be increased, and the steps S12 and S13 are repeated, namely, the maximum exhaust resistance value delta P of the starting terminal of each floor when the target exhaust air volume is reached is calculated according to the number m of the starting terminals and the power performance curve f (P, Q) of the terminal at the current gear (the increased gear), againmaxAccording to the new maximum air discharge resistance value delta PmaxThe target opening degree of the first power distribution valve and the target opening degree of the second power distribution valve of each floor in the high-floor group are newly determined.
The air pressure provided by the built-in air exhaust motor of the starting terminal machine can be improved by improving the gear of the starting terminal machine, so that the air exhaust resistance required to be overcome when the starting terminal machine reaches the target air exhaust volume is reduced, the target resistance coefficient required to be provided by the second power distribution valve is further reduced, the target opening degree of the power distribution valve is increased, and the squeaking noise is reduced.
It should be noted that, if the gear of the start-up terminal is increased, the difference between the resistance coefficients is still greater than the resistance coefficient of the second power distribution valve at the second preset squeal opening degree, the gear of the start-up terminal may be continuously increased until the difference between the resistance coefficients is less than or equal to the resistance coefficient of the second power distribution valve at the second preset squeal opening degree, so that the target opening degree of the second power distribution valve may be directly determined according to the difference between the resistance coefficients, and the obtained target opening degree is greater than the second preset squeal opening degree, so that the squeal of the second power distribution valve may not occur.
Optionally, the operating condition information further includes a target air discharge amount of the terminal.
Determining a target opening degree of the second power distribution valve according to the resistance coefficient difference value, further comprising:
and when the resistance coefficient difference is larger than the resistance coefficient of the second power distribution valve at the second preset squeal opening degree, reducing the target air exhaust volume of the starting terminal, and repeating the steps S2 and S3.
Wherein, the central range hood system can preset a plurality of effective exhaust volumes for the terminal machine.
For example, the central range hood system can preset effective exhaust air volume of three terminals: qZ1、QZ2And QZ3And Q isZ1＞QZ2＞QZ3It can be understood that the larger the effective exhaust air volume of the terminal machine is, the better the effect of absorbing the oil smoke is. Wherein Q may be setZ1Is 12 cubic meters per minute, QZ2Is 11 cubic meters per minute, QZ3The effective air discharge amount is 10 cubic meters per minute, but the invention is not limited to this, and the value of the effective air discharge amount can be set according to the actual requirement, which is not limited in the embodiment of the invention.
Wherein, the initial default target exhaust air volume of the central range hood system can be the effective exhaust air volume QZ1Setting the initial default target exhaust air quantity as the preset maximum effective exhaust air quantity QZ1The best smoke exhaust effect can be achieved.
It should be noted that, in order to ensure the effect of absorbing the oil smoke, the minimum effective air exhausting amount can be set to be more than or equal to 9 cubic meters per minute; meanwhile, in order to prevent the power consumption from being too large, the maximum effective air exhaust amount may be set to be not more than 15 cubic meters per minute, but is not limited thereto, and those skilled in the art may set the maximum effective air exhaust amount according to actual requirements.
It should be noted that, the above embodiment only takes the terminal to preset 3 effective air exhausting volumes as an example, but is not limited to this, and a person skilled in the art can set the number of the preset effective air exhausting volumes according to actual requirements, and normally, the terminal can be preset to have 3 to 4 effective air exhausting volumes.
Further, when the difference of the resistance coefficients is greater than the resistance coefficient of the second power distribution valve at the second preset howling opening degree, if the difference of the resistance coefficients is provided by the second power distribution valve, the target opening degree is smaller than the second preset howling opening degree to generate howling, at this time, the target exhaust volume of the start-up terminal can be reduced, and the above-mentioned S12 and S13 are repeated, that is, the start-up terminal of each floor is calculated again according to the number m of the start-up terminals and the target exhaust volume of the start-up terminal (the reduced target exhaust volume) until the current start-up terminal reaches the target exhaust volume of the start-up terminal at the current floorMaximum air discharge resistance value delta P at target air discharge ratemaxAccording to the new maximum air discharge resistance value delta PmaxThe target opening degree of the first power distribution valve and the target opening degree of the second power distribution valve of each floor in the high-floor group are newly determined.
The target air exhaust amount of the starting terminal machine is reduced, so that the air exhaust resistance required to be overcome when the starting terminal machine reaches the target air exhaust amount can be reduced, the target resistance coefficient required to be provided by the second power distribution valve is reduced, the target opening degree of the second power distribution valve is increased, and the howling noise is reduced.
It should be noted that, if the target air discharge amount of the start-up terminal is reduced, the difference between the resistance coefficients is still greater than the resistance coefficient of the second power distribution valve at the second preset squeal opening degree, the target air discharge amount of the start-up terminal may be continuously reduced until the difference between the resistance coefficients is less than or equal to the resistance coefficient of the second power distribution valve at the second preset squeal opening degree, so that the target opening degree of the second power distribution valve may be directly determined according to the difference between the resistance coefficients, and the obtained target opening degree is greater than the second preset squeal opening degree, so that the squeal of the second power distribution valve may not occur.
Optionally, after determining the maximum air discharge resistance value of the terminal machine according to the current working condition information, the method further includes:
and determining the target operation state of the exhaust main machine according to the maximum exhaust resistance value and the current working condition information.
And controlling the exhaust main machine to operate in a target operation state.
Wherein, confirm the target running state of the host computer of airing exhaust according to maximum resistance value of airing exhaust and current operating mode information includes:
and when the maximum air exhaust resistance value is less than or equal to 0, determining that the target operation state of the air exhaust main machine is a closed state.
And when the maximum air exhaust resistance value is larger than 0, determining that the target running state of the air exhaust main machine is an opening state.
When the maximum air exhaust resistance value is less than or equal to 0, the starting terminal of each floor does not need to overcome the air exhaust resistance when reaching the target air exhaust volume, and at the moment, the air exhaust main machine is in a closed state, namely the power fan equipment of the air exhaust main machine is not started, so that the power consumption is reduced; when the maximum air exhaust resistance value is larger than 0, the air exhaust resistance which needs to be overcome when the starting terminal machine of each floor reaches the target air exhaust amount is a positive value, at the moment, the air exhaust main machine is in an open state, and the power fan device works to extract the oil smoke in the public flue 10 and assist each floor in exhausting smoke, so that the starting terminal machine of each floor can reach the target air exhaust amount.
Optionally, the method determines a target operation state of the exhaust main machine according to the maximum exhaust resistance value and the current working condition information, and further includes:
and when the maximum air exhaust resistance value is larger than 0, determining the working point information of the air exhaust host machine according to the maximum air exhaust resistance value and the current working condition information, wherein the working point information comprises the air volume value and the air pressure value of the air exhaust host machine at the working point.
And determining the target operation frequency of the exhaust main machine according to the working point information.
Controlling the exhaust main machine to operate in the target operation state further comprises controlling the exhaust main machine to operate at the target operation frequency.
The working point information of the exhaust main machine comprises an air volume value Q and an air pressure value P when the exhaust main machine is at the working point, namely the working point is expressed as (P)0，Q0)。
When the maximum air exhaust resistance value is larger than 0, setting P0＝ΔPmax，Q0＝1.15*m*QZ1(target exhaust air quantity is Q)Z1For example), wherein 1.15 is the air leakage rate coefficient of the common flue of the system, and then the power performance curve f of the power fan device of the exhaust main machine at each operating frequency is obtainedx(P，Q，Rx) Determining the target operating frequency R of the exhaust main machinexControlling the frequency R of the power fan device of the exhaust main machinexThe terminal machine runs at a proper frequency, can provide enough smoke exhaust power, enables the starting terminal machine with the largest air exhaust resistance value to reach a target air exhaust amount, and does not increase power consumption due to overlarge power.
Wherein, the dynamic performance curve fx(P，Q，Rx) Is thatReferring to a relationship curve between wind pressure and wind volume of a power fan device of an exhaust main machine, for example, fig. 5 is a schematic diagram of a power performance curve of an exhaust main machine provided by an embodiment of the present invention, as shown in fig. 5, an abscissa Q represents wind volume, an ordinate P represents wind pressure, and a terminal machine at different frequencies Rx(with R)1、R2And R3For example) corresponding to different dynamic performance curves.
It should be noted that the common flue gas leakage rate coefficient of the system is not limited to 1.15, and can be set by those skilled in the art according to actual situations.
In order to more clearly describe the technical solutions provided by the embodiments of the present invention, the following is a detailed description of the control method of the central range hood system provided by the present invention in a feasible implementation manner, and explanations of the same or corresponding terms as those in the above embodiments are not repeated herein.
Fig. 6 is a schematic structural diagram of a control method of a central extractor hood system according to an embodiment of the present invention, and as shown in fig. 6, taking a first preset squeal opening degree and a second preset squeal opening degree both of which are 45 °, as an example, the control method of the central extractor hood system includes:
s110, numbering first power distribution valves arranged in kitchens of all floors of the same public flue, and sequentially numbering 1-1 from floor 1 to number N-1 of the top floor. And the second power distribution valves of the respective floors in the high-rise building group are numbered, for example, if the first power distribution valve and the second power distribution valve are installed at the ith floor at the same time, the number of the first power distribution valve 1 of the ith floor is i-1, and the number of the second power distribution valve 15 is i-2.
Meanwhile, the air exhaust host machine and the first power distribution valves of all floors can be networked, so that real-time communication between the air exhaust host machine and the first power distribution valves of all floors is realized, and the air exhaust host machine can acquire startup and shutdown signals of all terminals.
And S120, detecting a startup and shutdown signal of the terminal machine in real time by the first power distribution valve of each floor, and broadcasting the startup signal to the central range hood networking system by the first power distribution valve after detecting the startup signal of the terminal machine.
S130, the exhaust host machine is used for exhausting air according to the starting number m of the starting terminal machine and the target exhaust volume Q of the starting terminal machineZThe total floor number N, the floor height h, the roughness k of the public flue, the power performance curve f (P, Q) of the terminal and the section area S of the public flue are calculated, and the starting terminal of each floor is calculated when the target exhaust air volume Q is reachedZHourly exhaust resistance value delta Pi＝f(f(Qz)，S，QzN, k, m, h) and calculating the maximum air discharge resistance value delta Pmax。
The power performance working point of the exhaust main machine under the working condition is (P)0,Q0) Wherein the wind pressure value P0＝ΔPmaxAir volume value Q0＝1.15*m*QZ1(wherein, 1.15 is the air leakage rate coefficient of the system common flue). And then combining the power performance curve f of the power fan equipment of the exhaust main machine at each operating frequencyx(P，Q，Rx) Controlling the frequency R of the power fan device of the exhaust main machinexAnd (5) operating.
Meanwhile, the opening degree of the power distribution valve corresponding to the starting terminal machine of each floor is adjusted, and the air exhaust resistance of the starting terminal machine of each floor is adjusted, wherein the opening degree control method of the power distribution valve can comprise the following steps:
s140-1, when Δ PmaxWhen being less than or equal to 0, the power fan equipment of the main engine of airing exhaust does not open, and the aperture of the first power distribution valve that all the start-up terminal machines correspond is 90 degrees, and in the high-rise building group, the aperture of the second power distribution valve that all the start-up terminal machines correspond is 90 degrees.
S140-2, when Δ PmaxWhen the frequency is more than 0, the power fan device of the exhaust main machine is at the frequency R in S130xAnd (5) operating. Calculating the maximum air exhaust resistance value delta PmaxAnd the exhaust resistance value delta PiDifference Δ P therebetweenmax-ΔPiAs a difference in resistance Δ PixThen calculating the target exhaust air quantity Q of the power distribution valvezTarget resistance coefficient xi required to be adjustedix＝ΔPix/(Qz*Qz). Then, a target resistance coefficient xi is calculatedixAnd a resistance system of the first power distribution valve when the opening degree is a first preset squeal opening degreeXi number45(the first preset howling opening is exemplified by 45 °) to the difference ξi＝ξix-ξ45。
S150, when xiiWhen the opening degree-resistance characteristic relation f (xi) of the power distribution valve is less than or equal to 0ixθ) calculates a target opening degree θ of the first power distribution valvei-1If the second power distribution valve is installed at the floor, the target opening degree theta of the second power distribution valvei-2Is 90 DEG, and controls the first power distribution valve to perform the target opening degree thetai-1First power distribution valve execution target opening degree thetai-2。
S160, when xiiWhen > 0, the target opening degree theta of the first power distribution valvei-1At 45 degrees, according to the opening-resistance characteristic relation f (xi) of the power distribution valveixθ) calculating a target opening degree θ of the second power distribution valvei-2And controls the first power distribution valve to perform the target opening degree thetai-1First power distribution valve execution target opening degree thetai-2。
According to the central range hood system and the control method thereof provided by the embodiment of the invention, the second power distribution valve is arranged on 20% of the floors at the top according to the pressure distribution characteristic of the common flue, so that the resistance of the central range hood system to be adjusted by the first power distribution valve on the floors at the top under the high-opening-rate condition is reduced, the high-efficiency balanced air exhaust is finally realized, the squeaking noise generated by the power distribution valves is avoided, and the user experience is improved.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A central range hood system is characterized by comprising a public flue, an exhaust main machine, a first power distribution valve and a terminal machine, wherein the first power distribution valve and the terminal machine are positioned on each floor of a building;
the air exhaust main machine is positioned at an outlet of the public flue;
the terminal is connected with the public flue through an exhaust pipeline;
the first power distribution valve is arranged at the outlet of the exhaust pipeline;
the building comprises a high floor group and a low floor group, wherein the high floor group comprises at least one floor, the low floor group comprises at least one floor, and the height of any floor in the high floor group is higher than that of any floor in the low floor group;
and each floor in the high-rise floor group is provided with a second power distribution valve, the second power distribution valve is positioned at the inlet of the exhaust pipeline, and the second power distribution valve is used for providing exhaust resistance for the terminal machine.
2. The central extractor hood system of claim 1,
the opening degree of the first power distribution valve is greater than or equal to a first preset howling opening degree;
the opening degree of the second power distribution valve is greater than or equal to a second preset squeal opening degree;
the first preset whistle opening degree is the opening degree of the first power distribution valve when the whistle occurs, and the second preset whistle opening degree is the opening degree of the second power distribution valve when the whistle occurs.
3. The central extractor hood system of claim 1,
the number of floors in the high floor group is A, the number of floors in the low floor group is B, wherein A/B is more than 0 and less than or equal to 20%.
4. A control method of a central range hood system, which is characterized in that the control method is applied to the central range hood system of any one of claims 1 to 3;
the control method comprises the following steps:
s1, obtaining current working condition information, wherein the working condition information comprises the number of the starting-up terminal machines;
s2, determining the maximum air exhaust resistance value of the starting terminal machine according to the current working condition information;
s3, determining the target opening degree of the first power distribution valve of each floor in the low floor group according to the maximum exhaust resistance value, and determining the target opening degree of the first power distribution valve and the target opening degree of the second power distribution valve of each floor in the high floor group;
and S4, controlling the first power distribution valve and the second power distribution valve to execute the target opening degrees.
5. The control method according to claim 4,
determining the target opening degree of the first power distribution valve and the target opening degree of the second power distribution valve of each floor in the high-rise building group according to the maximum air exhaust resistance value, and the method comprises the following steps:
and when the maximum air exhaust resistance value is less than or equal to 0, determining that the target opening degree of the first power distribution valve of the floor where the starting terminal machine is located is 90 degrees, and determining that the target opening degree of the second power distribution valve of the floor where the starting terminal machine is located is 90 degrees.
6. The control method according to claim 4,
determining a target opening degree of the first power distribution valve and a target opening degree of the second power distribution valve of each floor in the high-rise building group according to the maximum air discharge resistance value, comprising:
when the maximum air exhaust resistance value is larger than 0, determining target resistance coefficients of the first power distribution valve and the second power distribution valve of the floor where each starting terminal is located according to the maximum air exhaust resistance value;
when the target resistance coefficient is smaller than or equal to the resistance coefficient of the first power distribution valve under the preset squealing opening degree, determining the target opening degree of the first power distribution valve according to the target resistance coefficient, wherein the target opening degree of the second power distribution valve on the floor where the starting terminal is located is 90 degrees;
when the target resistance coefficient is larger than the resistance coefficient of the first power distribution valve under the preset squeal opening degree, determining the target opening degree of the first power distribution valve of the floor where the starting terminal is located as the first preset squeal opening degree, and determining the target opening degree of the second power distribution valve according to the target resistance coefficient.
7. The control method according to claim 6,
determining a target opening degree of the second power distribution valve according to the target resistance coefficient includes:
determining a difference value between the target resistance coefficient and a resistance coefficient of the first power distribution valve at a preset howling opening degree as a resistance coefficient difference value;
and determining the target opening degree of the second power distribution valve according to the resistance coefficient difference value.
8. The control method according to claim 7,
determining a target opening degree of the second power distribution valve according to the resistance coefficient difference, including:
when the resistance coefficient difference is larger than the resistance coefficient of the second power distribution valve at a second preset squeal opening degree;
and determining the target opening degree of the second power distribution valve as a second preset squeal opening degree.
9. The control method according to claim 7,
the working condition information also comprises the gear of the starting terminal machine;
determining a target opening degree of the second power distribution valve according to the resistance coefficient difference, further comprising:
and when the resistance coefficient difference is larger than the resistance coefficient of the second power distribution valve at the second preset squeal opening degree, increasing the gear of the starting terminal, and repeating the steps S2 and S3.
10. The control method according to claim 7,
the working condition information also comprises a target air exhaust volume of the starting terminal machine;
determining a target opening degree of the second power distribution valve according to the resistance coefficient difference, further comprising:
and when the resistance coefficient difference is larger than the resistance coefficient of the second power distribution valve at the second preset squeal opening degree, reducing the target air discharge amount of the starting terminal, and repeating the steps S2 and S3.
CN202210291965.5A 2022-03-23 2022-03-23 Central range hood system and control method thereof Pending CN114562754A (en)

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